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.TH RANGER 1 ranger-1.0.4
.SH NAME
ranger - file manager with a high range overview
.\"-----------------------------------------
.SH SYNOPSIS
.B ranger
.R [OPTIONS] [FILE]
.\"-----------------------------------------
.SH DESCRIPTION
ranger is a file manager with an ncurses frontend that is designed for
smooth interaction with the human visual interface and compatibility with
the muscle memory of individuals with long term exposure to common CLI tools
of unix-like operating systems.
.\"-----------------------------------------
.SH OPTIONS
.TP
--version
Print the version and exit.
.TP
-h, --help
Print a list of options and exit.
.TP
-d, --debug
Activate the debug mode:  Whenever an error occurs, ranger will exit and
print a full backtrace.  The default behaviour is to merely print the
name of the exception in the statusbar/log and to try to keep running.
.TP
-c, --clean
Activate the clean mode:  Ranger will not access or create any configuration
files nor will it leave any traces on your system.  This is useful when
your configuration is broken, when you want to avoid clutter, etc.
.TP
-r \fIdir\fR, --confdir=\fIdir\fR
Define a different configuration directory.  The default is $HOME/.ranger.
.TP
-m \fIn\fR, --mode=\fIn\fR
When a filename is supplied, make it run in mode \fIn\fR. Check the
documentation for more information on modes.
.TP
-f \fIflags\fR, --flags=\fIflags\fR
When a filename is supplied, make it run with the flags \fIflags\fR. Check the
documentation for more information on flags.
.\"-----------------------------------------
.SH USAGE
.\"-----------------------------------------
.SS Keybindings
Many keybindings take an additional numeric argument.  Type \fI5j\fR to move
down 5 lines, \fI10<Space>\fR to mark 10 files or \fI3?\fR to read the
third chapter of the documentation.
.TP
h, j, k, l
Move left, down, up, right
.TP
^D or J, ^U or K
Move a half page down, up
.TP
H, L
Move back and forward in the history
.TP
gg
Move to the top
.TP
G
Move to the bottom
.TP
yy
Yank the selection.  (mark the files as copied)
.TP
dd
Cut the selection
.TP
pp
Paste the copied/cut files.  By default, this will not overwrite existing
files.  To overwrite them, use \fBpo\fR.
.TP
m\fIX\fR
Create a bookmark with the name \fIX\fR
.TP
`\fIX\fR
Move to the bookmark with the name \fIX\fR
.TP
n, N
Find the next file, the previous file.  You can define what to look for
by typing c\fIX\fR.  If nothing is specified, pressing n will get you to
the newest file in the directory.
.TP
o\fIX\fR
Change the sort method (like in mutt)
.TP
z\fIX\fR
Change settings
.TP
f
Quickly navigate by entering a part of the filename
.TP
Space
Mark a file
.TP
v, V
Toggle the mark-status of all files, unmark all files
.TP
/
Open the search console
.TP
:
Open the command console
.TP
?
Opens the help screen with more keybindings and documentation
.\"-----------------------------------------
.SS Mouse Usage
.TP
Left Mouse Button
Click on something and you'll move there.
To run a file, "enter" it, like a directory, by clicking on the preview.
.TP
Right Mouse Button
Enter a directory
.TP
Scroll Wheel
Scroll
.\"-----------------------------------------
.SS Commands
.TP
:delete
Destroy all files in the selection with a roundhouse kick.  Ranger will
ask for a confirmation if you attempt to delete multiple (marked) files or
non-empty directories.
.TP
:rename \fInewname\fR
Rename the current file.  Also try the keybinding A for appending something
to a file name.
.TP
:quit
Quit ranger.  The current directory will be bookmarked as ' so you can
re-enter it by typing `` or '' the next time you start ranger.
.\"-----------------------------------------
.SH TIPS
.SS
Change the directory after exit
A script like this in your bashrc would make you change the directory
of your parent shell after exiting ranger:
.nf

ranger() {
    $(which ranger) $@ &&
    cd "$(grep \\^\\' ~/.ranger/bookmarks | cut -b3-)"
}
.\"-----------------------------------------
.SH CONFIGURATION
The files in
.B ranger/defaults/
can be copied into your configuration directory (by default, this is
$HOME/.ranger) and customized according to your wishes.  
.B ranger/defaults/options.py
doesn't have to be copied completely though: Just define those settings
you want to change and they will override the default values.
Colorschemes can be placed in $HOME/.ranger/colorschemes.
.P
All configuration is done in Python.
Each configuration file should contain sufficient documentation.
.\"-----------------------------------------
.SH COPYRIGHT
Copyright \(co
2009, 2010
Roman Zimbelmann
.P
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

There is NO warranty;
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
.\"-----------------------------------------
.SH SEE ALSO
The project page:
.RB < http://savannah.nongnu.org/projects/ranger >
.P
The mailing list:
.RB < http://savannah.nongnu.org/mail/?group=ranger >
.\"-----------------------------------------
.SH BUGS
Since Chuck Norris, the Texas Ranger, watches over this project, there ought
to be no bugs.  If you think otherwise, please report them here:
.P
.RB < http://savannah.nongnu.org/bugs/?group=ranger >
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<pre id='vimCodeElement'>
<span id="L1" class="LineNr">   1 </span><span class="SalientComment">## handling events from the keyboard, mouse, touch screen, ...</span>
<span id="L2" class="LineNr">   2 </span>
<span id="L3" class="LineNr">   3 </span><span class="Comment"># temporary main: interactive editor</span>
<span id="L4" class="LineNr">   4 </span><span class="Comment"># hit ctrl-c to exit</span>
<span id="L5" class="LineNr">   5 </span><span class="muRecipe">def!</span> main text:text [
<span id="L6" class="LineNr">   6 </span>  <span class="Constant">local-scope</span>
<span id="L7" class="LineNr">   7 </span>  <span class="Constant">load-ingredients</span>
<span id="L8" class="LineNr">   8 </span>  open-console
<span id="L9" class="LineNr">   9 </span>  <a href='../081print.mu.html#L46'>clear-screen</a> <span class="Constant">0/screen</span>  <span class="Comment"># non-scrolling app</span>
<span id="L10" class="LineNr">  10 </span>  editor:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> text, <span class="Constant">5/left</span>, <span class="Constant">45/right</span>
<span id="L11" class="LineNr">  11 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <span class="Constant">0/screen</span>, editor
<span id="L12" class="LineNr">  12 </span>  <a href='002-typing.mu.html#L16'>editor-event-loop</a> <span class="Constant">0/screen</span>, <span class="Constant">0/console</span>, editor
<span id="L13" class="LineNr">  13 </span>  close-console
<span id="L14" class="LineNr">  14 </span>]
<span id="L15" class="LineNr">  15 </span>
<span id="L16" class="LineNr">  16 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>:&amp;:<a href='../084console.mu.html#L23'>console</a>, editor:&amp;:editor<span class="muRecipe"> -&gt; </span><a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>:&amp;:<a href='../084console.mu.html#L23'>console</a>, editor:&amp;:editor [
<span id="L17" class="LineNr">  17 </span>  <span class="Constant">local-scope</span>
<span id="L18" class="LineNr">  18 </span>  <span class="Constant">load-ingredients</span>
<span id="L19" class="LineNr">  19 </span>  <span class="Delimiter">{</span>
<span id="L20" class="LineNr">  20 </span>  <span class="Conceal">¦</span> <span class="Comment"># looping over each (keyboard or touch) event as it occurs</span>
<span id="L21" class="LineNr">  21 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> +next-event</span>
<span id="L22" class="LineNr">  22 </span>  <span class="Conceal">¦</span> cursor-row:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-row:offset</span>
<span id="L23" class="LineNr">  23 </span>  <span class="Conceal">¦</span> cursor-column:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-column:offset</span>
<span id="L24" class="LineNr">  24 </span>  <span class="Conceal">¦</span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special">&lt;-</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, cursor-row, cursor-column
<span id="L25" class="LineNr">  25 </span>  <span class="Conceal">¦</span> e:<a href='../084console.mu.html#L4'>event</a>, found?:bool, quit?:bool, <a href='../084console.mu.html#L23'>console</a> <span class="Special">&lt;-</span> <a href='../084console.mu.html#L35'>read-event</a> <a href='../084console.mu.html#L23'>console</a>
<span id="L26" class="LineNr">  26 </span>  <span class="Conceal">¦</span> <span class="muControl">loop-unless</span> found?
<span id="L27" class="LineNr">  27 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> quit?  <span class="Comment"># only in tests</span>
<span id="L28" class="LineNr">  28 </span>  <span class="Conceal">¦</span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[next-event]</span>
<span id="L29" class="LineNr">  29 </span>  <span class="Conceal">¦</span> <span class="Comment"># 'touch' event</span>
<span id="L30" class="LineNr">  30 </span>  <span class="Conceal">¦</span> t:<a href='../084console.mu.html#L12'>touch-event</a>, is-touch?:bool <span class="Special">&lt;-</span> maybe-convert e, <span class="Constant">touch:variant</span>
<span id="L31" class="LineNr">  31 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L32" class="LineNr">  32 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> is-touch?
<span id="L33" class="LineNr">  33 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> move-cursor editor, <a href='../081print.mu.html#L16'>screen</a>, t
<span id="L34" class="LineNr">  34 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">loop</span> <span class="Constant">+next-event</span>
<span id="L35" class="LineNr">  35 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L36" class="LineNr">  36 </span>  <span class="Conceal">¦</span> <span class="Comment"># keyboard events</span>
<span id="L37" class="LineNr">  37 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L38" class="LineNr">  38 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-if</span> is-touch?
<span id="L39" class="LineNr">  39 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> go-render?:bool <span class="Special">&lt;-</span> <a href='002-typing.mu.html#L166'>handle-keyboard-event</a> <a href='../081print.mu.html#L16'>screen</a>, editor, e
<span id="L40" class="LineNr">  40 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L41" class="LineNr">  41 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> go-render?
<span id="L42" class="LineNr">  42 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special">&lt;-</span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, editor
<span id="L43" class="LineNr">  43 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L44" class="LineNr">  44 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L45" class="LineNr">  45 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span>
<span id="L46" class="LineNr">  46 </span>  <span class="Delimiter">}</span>
<span id="L47" class="LineNr">  47 </span>]
<span id="L48" class="LineNr">  48 </span>
<span id="L49" class="LineNr">  49 </span><span class="Comment"># process click, return if it was on current editor</span>
<span id="L50" class="LineNr">  50 </span><span class="muRecipe">def</span> move-cursor editor:&amp;:editor, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, t:<a href='../084console.mu.html#L12'>touch-event</a><span class="muRecipe"> -&gt; </span>in-focus?:bool, editor:&amp;:editor [
<span id="L51" class="LineNr">  51 </span>  <span class="Constant">local-scope</span>
<span id="L52" class="LineNr">  52 </span>  <span class="Constant">load-ingredients</span>
<span id="L53" class="LineNr">  53 </span>  <span class="muControl">return-unless</span> editor, <span class="Constant">0/false</span>
<span id="L54" class="LineNr">  54 </span>  click-row:num <span class="Special">&lt;-</span> get t, <span class="Constant">row:offset</span>
<span id="L55" class="LineNr">  55 </span>  <span class="muControl">return-unless</span> click-row, <span class="Constant">0/false</span>  <span class="Comment"># ignore clicks on 'menu'</span>
<span id="L56" class="LineNr">  56 </span>  click-column:num <span class="Special">&lt;-</span> get t, <span class="Constant">column:offset</span>
<span id="L57" class="LineNr">  57 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L58" class="LineNr">  58 </span>  too-far-left?:bool <span class="Special">&lt;-</span> lesser-than click-column, left
<span id="L59" class="LineNr">  59 </span>  <span class="muControl">return-if</span> too-far-left?, <span class="Constant">0/false</span>
<span id="L60" class="LineNr">  60 </span>  right:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">right:offset</span>
<span id="L61" class="LineNr">  61 </span>  too-far-right?:bool <span class="Special">&lt;-</span> greater-than click-column, right
<span id="L62" class="LineNr">  62 </span>  <span class="muControl">return-if</span> too-far-right?, <span class="Constant">0/false</span>
<span id="L63" class="LineNr">  63 </span>  <span class="Comment"># position cursor</span>
<span id="L64" class="LineNr">  64 </span><span class="Constant">  &lt;begin-move-cursor&gt;</span>
<span id="L65" class="LineNr">  65 </span>  editor <span class="Special">&lt;-</span> <a href='002-typing.mu.html#L75'>snap-cursor</a> editor, <a href='../081print.mu.html#L16'>screen</a>, click-row, click-column
<span id="L66" class="LineNr">  66 </span>  undo-coalesce-tag:num <span class="Special">&lt;-</span> copy <span class="Constant">0/never</span>
<span id="L67" class="LineNr">  67 </span><span class="Constant">  &lt;end-move-cursor&gt;</span>
<span id="L68" class="LineNr">  68 </span>  <span class="Comment"># gain focus</span>
<span id="L69" class="LineNr">  69 </span>  <span class="muControl">return</span> <span class="Constant">1/true</span>
<span id="L70" class="LineNr">  70 </span>]
<span id="L71" class="LineNr">  71 </span>
<span id="L72" class="LineNr">  72 </span><span class="Comment"># Variant of 'render' that only moves the cursor (coordinates and</span>
<span id="L73" class="LineNr">  73 </span><span class="Comment"># before-cursor). If it's past the end of a line, it 'slides' it left. If it's</span>
<span id="L74" class="LineNr">  74 </span><span class="Comment"># past the last line it positions at end of last line.</span>
<span id="L75" class="LineNr">  75 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L75'>snap-cursor</a> editor:&amp;:editor, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, target-row:num, target-column:num<span class="muRecipe"> -&gt; </span>editor:&amp;:editor [
<span id="L76" class="LineNr">  76 </span>  <span class="Constant">local-scope</span>
<span id="L77" class="LineNr">  77 </span>  <span class="Constant">load-ingredients</span>
<span id="L78" class="LineNr">  78 </span>  <span class="muControl">return-unless</span> editor
<span id="L79" class="LineNr">  79 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L80" class="LineNr">  80 </span>  right:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">right:offset</span>
<span id="L81" class="LineNr">  81 </span>  <a href='../081print.mu.html#L782'>screen-height</a>:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L782'>screen-height</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L82" class="LineNr">  82 </span>  <span class="Comment"># count newlines until screen row</span>
<span id="L83" class="LineNr">  83 </span>  curr:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">top-of-screen:offset</span>
<span id="L84" class="LineNr">  84 </span>  <a href='../065duplex_list.mu.html#L36'>prev</a>:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> copy curr  <span class="Comment"># just in case curr becomes null and we can't compute prev</span>
<span id="L85" class="LineNr">  85 </span>  curr <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> curr
<span id="L86" class="LineNr">  86 </span>  row:num <span class="Special">&lt;-</span> copy <span class="Constant">1/top</span>
<span id="L87" class="LineNr">  87 </span>  column:num <span class="Special">&lt;-</span> copy left
<span id="L88" class="LineNr">  88 </span>  *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-row:offset</span>, target-row
<span id="L89" class="LineNr">  89 </span>  cursor-row:num <span class="Special">&lt;-</span> copy target-row
<span id="L90" class="LineNr">  90 </span>  *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-column:offset</span>, target-column
<span id="L91" class="LineNr">  91 </span>  cursor-column:num <span class="Special">&lt;-</span> copy target-column
<span id="L92" class="LineNr">  92 </span>  before-cursor:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">before-cursor:offset</span>
<span id="L93" class="LineNr">  93 </span>  <span class="Delimiter">{</span>
<span id="L94" class="LineNr">  94 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> +next-character</span>
<span id="L95" class="LineNr">  95 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> curr
<span id="L96" class="LineNr">  96 </span>  <span class="Conceal">¦</span> off-screen?:bool <span class="Special">&lt;-</span> greater-or-equal row, <a href='../081print.mu.html#L782'>screen-height</a>
<span id="L97" class="LineNr">  97 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> off-screen?
<span id="L98" class="LineNr">  98 </span>  <span class="Conceal">¦</span> <span class="Comment"># update editor.before-cursor</span>
<span id="L99" class="LineNr">  99 </span>  <span class="Conceal">¦</span> <span class="Comment"># Doing so at the start of each iteration ensures it stays one step behind</span>
<span id="L100" class="LineNr"> 100 </span>  <span class="Conceal">¦</span> <span class="Comment"># the current character.</span>
<span id="L101" class="LineNr"> 101 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L102" class="LineNr"> 102 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-cursor-row?:bool <span class="Special">&lt;-</span> equal row, cursor-row
<span id="L103" class="LineNr"> 103 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> at-cursor-row?
<span id="L104" class="LineNr"> 104 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-cursor?:bool <span class="Special">&lt;-</span> equal column, cursor-column
<span id="L105" class="LineNr"> 105 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> at-cursor?
<span id="L106" class="LineNr"> 106 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> before-cursor <span class="Special">&lt;-</span> copy <a href='../065duplex_list.mu.html#L36'>prev</a>
<span id="L107" class="LineNr"> 107 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor
<span id="L108" class="LineNr"> 108 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L109" class="LineNr"> 109 </span>  <span class="Conceal">¦</span> c:char <span class="Special">&lt;-</span> get *curr, <span class="Constant">value:offset</span>
<span id="L110" class="LineNr"> 110 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L111" class="LineNr"> 111 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># newline? move to left rather than 0</span>
<span id="L112" class="LineNr"> 112 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> newline?:bool <span class="Special">&lt;-</span> equal c, <span class="Constant">10/newline</span>
<span id="L113" class="LineNr"> 113 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> newline?
<span id="L114" class="LineNr"> 114 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># adjust cursor if necessary</span>
<span id="L115" class="LineNr"> 115 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L116" class="LineNr"> 116 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-cursor-row?:bool <span class="Special">&lt;-</span> equal row, cursor-row
<span id="L117" class="LineNr"> 117 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> at-cursor-row?
<span id="L118" class="LineNr"> 118 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> left-of-cursor?:bool <span class="Special">&lt;-</span> lesser-than column, cursor-column
<span id="L119" class="LineNr"> 119 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> left-of-cursor?
<span id="L120" class="LineNr"> 120 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> cursor-column <span class="Special">&lt;-</span> copy column
<span id="L121" class="LineNr"> 121 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column
<span id="L122" class="LineNr"> 122 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> before-cursor <span class="Special">&lt;-</span> copy <a href='../065duplex_list.mu.html#L36'>prev</a>
<span id="L123" class="LineNr"> 123 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor
<span id="L124" class="LineNr"> 124 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L125" class="LineNr"> 125 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># skip to next line</span>
<span id="L126" class="LineNr"> 126 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> row <span class="Special">&lt;-</span> add row,<span class="Constant"> 1</span>
<span id="L127" class="LineNr"> 127 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> column <span class="Special">&lt;-</span> copy left
<span id="L128" class="LineNr"> 128 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> curr <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> curr
<span id="L129" class="LineNr"> 129 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='../065duplex_list.mu.html#L36'>prev</a> <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> <a href='../065duplex_list.mu.html#L36'>prev</a>
<span id="L130" class="LineNr"> 130 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">loop</span> <span class="Constant">+next-character</span>
<span id="L131" class="LineNr"> 131 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L132" class="LineNr"> 132 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L133" class="LineNr"> 133 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># at right? wrap. even if there's only one more letter left; we need</span>
<span id="L134" class="LineNr"> 134 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># room for clicking on the cursor after it.</span>
<span id="L135" class="LineNr"> 135 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-right?:bool <span class="Special">&lt;-</span> equal column, right
<span id="L136" class="LineNr"> 136 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> at-right?
<span id="L137" class="LineNr"> 137 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> column <span class="Special">&lt;-</span> copy left
<span id="L138" class="LineNr"> 138 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> row <span class="Special">&lt;-</span> add row,<span class="Constant"> 1</span>
<span id="L139" class="LineNr"> 139 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># don't increment curr/prev</span>
<span id="L140" class="LineNr"> 140 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">loop</span> <span class="Constant">+next-character</span>
<span id="L141" class="LineNr"> 141 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L142" class="LineNr"> 142 </span>  <span class="Conceal">¦</span> curr <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> curr
<span id="L143" class="LineNr"> 143 </span>  <span class="Conceal">¦</span> <a href='../065duplex_list.mu.html#L36'>prev</a> <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> <a href='../065duplex_list.mu.html#L36'>prev</a>
<span id="L144" class="LineNr"> 144 </span>  <span class="Conceal">¦</span> column <span class="Special">&lt;-</span> add column,<span class="Constant"> 1</span>
<span id="L145" class="LineNr"> 145 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span>
<span id="L146" class="LineNr"> 146 </span>  <span class="Delimiter">}</span>
<span id="L147" class="LineNr"> 147 </span>  <span class="Comment"># is cursor to the right of the last line? move to end</span>
<span id="L148" class="LineNr"> 148 </span>  <span class="Delimiter">{</span>
<span id="L149" class="LineNr"> 149 </span>  <span class="Conceal">¦</span> at-cursor-row?:bool <span class="Special">&lt;-</span> equal row, cursor-row
<span id="L150" class="LineNr"> 150 </span>  <span class="Conceal">¦</span> cursor-outside-line?:bool <span class="Special">&lt;-</span> lesser-or-equal column, cursor-column
<span id="L151" class="LineNr"> 151 </span>  <span class="Conceal">¦</span> before-cursor-on-same-line?:bool <span class="Special">&lt;-</span> and at-cursor-row?, cursor-outside-line?
<span id="L152" class="LineNr"> 152 </span>  <span class="Conceal">¦</span> above-cursor-row?:bool <span class="Special">&lt;-</span> lesser-than row, cursor-row
<span id="L153" class="LineNr"> 153 </span>  <span class="Conceal">¦</span> before-cursor?:bool <span class="Special">&lt;-</span> or before-cursor-on-same-line?, above-cursor-row?
<span id="L154" class="LineNr"> 154 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> before-cursor?
<span id="L155" class="LineNr"> 155 </span>  <span class="Conceal">¦</span> cursor-row <span class="Special">&lt;-</span> copy row
<span id="L156" class="LineNr"> 156 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row
<span id="L157" class="LineNr"> 157 </span>  <span class="Conceal">¦</span> cursor-column <span class="Special">&lt;-</span> copy column
<span id="L158" class="LineNr"> 158 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column
<span id="L159" class="LineNr"> 159 </span>  <span class="Conceal">¦</span> before-cursor <span class="Special">&lt;-</span> copy <a href='../065duplex_list.mu.html#L36'>prev</a>
<span id="L160" class="LineNr"> 160 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor
<span id="L161" class="LineNr"> 161 </span>  <span class="Delimiter">}</span>
<span id="L162" class="LineNr"> 162 </span>]
<span id="L163" class="LineNr"> 163 </span>
<span id="L164" class="LineNr"> 164 </span><span class="Comment"># Process an event 'e' and try to minimally update the screen.</span>
<span id="L165" class="LineNr"> 165 </span><span class="Comment"># Set 'go-render?' to true to indicate the caller must perform a non-minimal update.</span>
<span id="L166" class="LineNr"> 166 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L166'>handle-keyboard-event</a> <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, editor:&amp;:editor, e:<a href='../084console.mu.html#L4'>event</a><span class="muRecipe"> -&gt; </span>go-render?:bool, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, editor:&amp;:editor [
<span id="L167" class="LineNr"> 167 </span>  <span class="Constant">local-scope</span>
<span id="L168" class="LineNr"> 168 </span>  <span class="Constant">load-ingredients</span>
<span id="L169" class="LineNr"> 169 </span>  <span class="muControl">return-unless</span> editor, <span class="Constant">0/don't-render</span>
<span id="L170" class="LineNr"> 170 </span>  <a href='../081print.mu.html#L768'>screen-width</a>:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L768'>screen-width</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L171" class="LineNr"> 171 </span>  <a href='../081print.mu.html#L782'>screen-height</a>:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L782'>screen-height</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L172" class="LineNr"> 172 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L173" class="LineNr"> 173 </span>  right:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">right:offset</span>
<span id="L174" class="LineNr"> 174 </span>  before-cursor:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">before-cursor:offset</span>
<span id="L175" class="LineNr"> 175 </span>  cursor-row:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-row:offset</span>
<span id="L176" class="LineNr"> 176 </span>  cursor-column:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-column:offset</span>
<span id="L177" class="LineNr"> 177 </span>  save-row:num <span class="Special">&lt;-</span> copy cursor-row
<span id="L178" class="LineNr"> 178 </span>  save-column:num <span class="Special">&lt;-</span> copy cursor-column
<span id="L179" class="LineNr"> 179 </span>  <span class="Comment"># character</span>
<span id="L180" class="LineNr"> 180 </span>  <span class="Delimiter">{</span>
<span id="L181" class="LineNr"> 181 </span>  <span class="Conceal">¦</span> c:char, is-unicode?:bool <span class="Special">&lt;-</span> maybe-convert e, <span class="Constant">text:variant</span>
<span id="L182" class="LineNr"> 182 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> is-unicode?
<span id="L183" class="LineNr"> 183 </span>  <span class="Conceal">¦</span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[handle-keyboard-event: special character]</span>
<span id="L184" class="LineNr"> 184 </span>  <span class="Conceal">¦</span> <span class="Comment"># exceptions for special characters go here</span>
<span id="L185" class="LineNr"> 185 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> <a href='002-typing.mu.html#L185'>&lt;handle-special-character&gt;</a></span>
<span id="L186" class="LineNr"> 186 </span>  <span class="Conceal">¦</span> <span class="Comment"># ignore any other special characters</span>
<span id="L187" class="LineNr"> 187 </span>  <span class="Conceal">¦</span> regular-character?:bool <span class="Special">&lt;-</span> greater-or-equal c, <span class="Constant">32/space</span>
<span id="L188" class="LineNr"> 188 </span>  <span class="Conceal">¦</span> <span class="muControl">return-unless</span> regular-character?, <span class="Constant">0/don't-render</span>
<span id="L189" class="LineNr"> 189 </span>  <span class="Conceal">¦</span> <span class="Comment"># otherwise type it in</span>
<span id="L190" class="LineNr"> 190 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> &lt;begin-insert-character&gt;</span>
<span id="L191" class="LineNr"> 191 </span>  <span class="Conceal">¦</span> go-render? <span class="Special">&lt;-</span> <a href='002-typing.mu.html#L203'>insert-at-cursor</a> editor, c, <a href='../081print.mu.html#L16'>screen</a>
<span id="L192" class="LineNr"> 192 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> &lt;end-insert-character&gt;</span>
<span id="L193" class="LineNr"> 193 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span>
<span id="L194" class="LineNr"> 194 </span>  <span class="Delimiter">}</span>
<span id="L195" class="LineNr"> 195 </span>  <span class="Comment"># special key to modify the text or move the cursor</span>
<span id="L196" class="LineNr"> 196 </span>  k:num, is-keycode?:bool <span class="Special">&lt;-</span> maybe-convert e:<a href='../084console.mu.html#L4'>event</a>, <span class="Constant">keycode:variant</span>
<span id="L197" class="LineNr"> 197 </span>  assert is-keycode?, <span class="Constant">[event was of unknown type; neither keyboard nor mouse]</span>
<span id="L198" class="LineNr"> 198 </span>  <span class="Comment"># handlers for each special key will go here</span>
<span id="L199" class="LineNr"> 199 </span><span class="Constant">  <a href='002-typing.mu.html#L199'>&lt;handle-special-key&gt;</a></span>
<span id="L200" class="LineNr"> 200 </span>  <span class="muControl">return</span> <span class="Constant">1/go-render</span>
<span id="L201" class="LineNr"> 201 </span>]
<span id="L202" class="LineNr"> 202 </span>
<span id="L203" class="LineNr"> 203 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L203'>insert-at-cursor</a> editor:&amp;:editor, c:char, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a><span class="muRecipe"> -&gt; </span>go-render?:bool, editor:&amp;:editor, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a> [
<span id="L204" class="LineNr"> 204 </span>  <span class="Constant">local-scope</span>
<span id="L205" class="LineNr"> 205 </span>  <span class="Constant">load-ingredients</span>
<span id="L206" class="LineNr"> 206 </span>  before-cursor:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">before-cursor:offset</span>
<span id="L207" class="LineNr"> 207 </span>  insert c, before-cursor
<span id="L208" class="LineNr"> 208 </span>  before-cursor <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> before-cursor
<span id="L209" class="LineNr"> 209 </span>  *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor
<span id="L210" class="LineNr"> 210 </span>  cursor-row:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-row:offset</span>
<span id="L211" class="LineNr"> 211 </span>  cursor-column:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-column:offset</span>
<span id="L212" class="LineNr"> 212 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L213" class="LineNr"> 213 </span>  right:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">right:offset</span>
<span id="L214" class="LineNr"> 214 </span>  save-row:num <span class="Special">&lt;-</span> copy cursor-row
<span id="L215" class="LineNr"> 215 </span>  save-column:num <span class="Special">&lt;-</span> copy cursor-column
<span id="L216" class="LineNr"> 216 </span>  <a href='../081print.mu.html#L768'>screen-width</a>:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L768'>screen-width</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L217" class="LineNr"> 217 </span>  <a href='../081print.mu.html#L782'>screen-height</a>:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L782'>screen-height</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L218" class="LineNr"> 218 </span>  <span class="Comment"># occasionally we'll need to mess with the cursor</span>
<span id="L219" class="LineNr"> 219 </span><span class="Constant">  <a href='002-typing.mu.html#L219'>&lt;insert-character-special-case&gt;</a></span>
<span id="L220" class="LineNr"> 220 </span>  <span class="Comment"># but mostly we'll just move the cursor right</span>
<span id="L221" class="LineNr"> 221 </span>  cursor-column <span class="Special">&lt;-</span> add cursor-column,<span class="Constant"> 1</span>
<span id="L222" class="LineNr"> 222 </span>  *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column
<span id="L223" class="LineNr"> 223 </span>  <a href='../065duplex_list.mu.html#L29'>next</a>:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> before-cursor
<span id="L224" class="LineNr"> 224 </span>  <span class="Delimiter">{</span>
<span id="L225" class="LineNr"> 225 </span>  <span class="Conceal">¦</span> <span class="Comment"># at end of all text? no need to scroll? just print the character and leave</span>
<span id="L226" class="LineNr"> 226 </span>  <span class="Conceal">¦</span> at-end?:bool <span class="Special">&lt;-</span> equal <a href='../065duplex_list.mu.html#L29'>next</a>, <span class="Constant">0/null</span>
<span id="L227" class="LineNr"> 227 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> at-end?
<span id="L228" class="LineNr"> 228 </span>  <span class="Conceal">¦</span> bottom:num <span class="Special">&lt;-</span> subtract <a href='../081print.mu.html#L782'>screen-height</a>,<span class="Constant"> 1</span>
<span id="L229" class="LineNr"> 229 </span>  <span class="Conceal">¦</span> at-bottom?:bool <span class="Special">&lt;-</span> equal save-row, bottom
<span id="L230" class="LineNr"> 230 </span>  <span class="Conceal">¦</span> at-right?:bool <span class="Special">&lt;-</span> equal save-column, right
<span id="L231" class="LineNr"> 231 </span>  <span class="Conceal">¦</span> overflow?:bool <span class="Special">&lt;-</span> and at-bottom?, at-right?
<span id="L232" class="LineNr"> 232 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> overflow?
<span id="L233" class="LineNr"> 233 </span>  <span class="Conceal">¦</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, save-row, save-column
<span id="L234" class="LineNr"> 234 </span>  <span class="Conceal">¦</span> print <a href='../081print.mu.html#L16'>screen</a>, c
<span id="L235" class="LineNr"> 235 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span>
<span id="L236" class="LineNr"> 236 </span>  <span class="Delimiter">}</span>
<span id="L237" class="LineNr"> 237 </span>  <span class="Delimiter">{</span>
<span id="L238" class="LineNr"> 238 </span>  <span class="Conceal">¦</span> <span class="Comment"># not at right margin? print the character and rest of line</span>
<span id="L239" class="LineNr"> 239 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L29'>next</a>
<span id="L240" class="LineNr"> 240 </span>  <span class="Conceal">¦</span> at-right?:bool <span class="Special">&lt;-</span> greater-or-equal cursor-column, <a href='../081print.mu.html#L768'>screen-width</a>
<span id="L241" class="LineNr"> 241 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> at-right?
<span id="L242" class="LineNr"> 242 </span>  <span class="Conceal">¦</span> curr:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> copy before-cursor
<span id="L243" class="LineNr"> 243 </span>  <span class="Conceal">¦</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, save-row, save-column
<span id="L244" class="LineNr"> 244 </span>  <span class="Conceal">¦</span> curr-column:num <span class="Special">&lt;-</span> copy save-column
<span id="L245" class="LineNr"> 245 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L246" class="LineNr"> 246 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># hit right margin? give up and let caller render</span>
<span id="L247" class="LineNr"> 247 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-right?:bool <span class="Special">&lt;-</span> greater-than curr-column, right
<span id="L248" class="LineNr"> 248 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span>
<span id="L249" class="LineNr"> 249 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> curr
<span id="L250" class="LineNr"> 250 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># newline? done.</span>
<span id="L251" class="LineNr"> 251 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> currc:char <span class="Special">&lt;-</span> get *curr, <span class="Constant">value:offset</span>
<span id="L252" class="LineNr"> 252 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-newline?:bool <span class="Special">&lt;-</span> equal currc, <span class="Constant">10/newline</span>
<span id="L253" class="LineNr"> 253 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-if</span> at-newline?
<span id="L254" class="LineNr"> 254 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> print <a href='../081print.mu.html#L16'>screen</a>, currc
<span id="L255" class="LineNr"> 255 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> curr-column <span class="Special">&lt;-</span> add curr-column,<span class="Constant"> 1</span>
<span id="L256" class="LineNr"> 256 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> curr <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> curr
<span id="L257" class="LineNr"> 257 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">loop</span>
<span id="L258" class="LineNr"> 258 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L259" class="LineNr"> 259 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span>
<span id="L260" class="LineNr"> 260 </span>  <span class="Delimiter">}</span>
<span id="L261" class="LineNr"> 261 </span>  <span class="muControl">return</span> <span class="Constant">1/go-render</span>
<span id="L262" class="LineNr"> 262 </span>]
<span id="L263" class="LineNr"> 263 </span>
<span id="L264" class="LineNr"> 264 </span><span class="Comment"># helper for tests</span>
<span id="L265" class="LineNr"> 265 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, editor:&amp;:editor<span class="muRecipe"> -&gt; </span><a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, editor:&amp;:editor [
<span id="L266" class="LineNr"> 266 </span>  <span class="Constant">local-scope</span>
<span id="L267" class="LineNr"> 267 </span>  <span class="Constant">load-ingredients</span>
<span id="L268" class="LineNr"> 268 </span>  old-top-idx:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L509'>save-top-idx</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L269" class="LineNr"> 269 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L270" class="LineNr"> 270 </span>  right:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">right:offset</span>
<span id="L271" class="LineNr"> 271 </span>  row:num, column:num <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L107'>render</a> <a href='../081print.mu.html#L16'>screen</a>, editor
<span id="L272" class="LineNr"> 272 </span>  <a href='../081print.mu.html#L553'>clear-line-until</a> <a href='../081print.mu.html#L16'>screen</a>, right
<span id="L273" class="LineNr"> 273 </span>  row <span class="Special">&lt;-</span> add row,<span class="Constant"> 1</span>
<span id="L274" class="LineNr"> 274 </span>  <a href='002-typing.mu.html#L1116'>draw-horizontal</a> <a href='../081print.mu.html#L16'>screen</a>, row, left, right, <span class="Constant">9480/horizontal-dotted</span>
<span id="L275" class="LineNr"> 275 </span>  row <span class="Special">&lt;-</span> add row,<span class="Constant"> 1</span>
<span id="L276" class="LineNr"> 276 </span>  <a href='001-editor.mu.html#L207'>clear-screen-from</a> <a href='../081print.mu.html#L16'>screen</a>, row, left, left, right
<span id="L277" class="LineNr"> 277 </span>  <a href='../081print.mu.html#L515'>assert-no-scroll</a> <a href='../081print.mu.html#L16'>screen</a>, old-top-idx
<span id="L278" class="LineNr"> 278 </span>]
<span id="L279" class="LineNr"> 279 </span>
<span id="L280" class="LineNr"> 280 </span><span class="muScenario">scenario</span> editor-handles-empty-event-queue [
<span id="L281" class="LineNr"> 281 </span>  <span class="Constant">local-scope</span>
<span id="L282" class="LineNr"> 282 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L283" class="LineNr"> 283 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L284" class="LineNr"> 284 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L285" class="LineNr"> 285 </span>  assume-console <span class="Constant">[]</span>
<span id="L286" class="LineNr"> 286 </span>  run [
<span id="L287" class="LineNr"> 287 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L288" class="LineNr"> 288 </span>  ]
<span id="L289" class="LineNr"> 289 </span>  screen-should-contain [
<span id="L290" class="LineNr"> 290 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L291" class="LineNr"> 291 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L292" class="LineNr"> 292 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L293" class="LineNr"> 293 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L294" class="LineNr"> 294 </span>  ]
<span id="L295" class="LineNr"> 295 </span>]
<span id="L296" class="LineNr"> 296 </span>
<span id="L297" class="LineNr"> 297 </span><span class="muScenario">scenario</span> editor-handles-mouse-clicks [
<span id="L298" class="LineNr"> 298 </span>  <span class="Constant">local-scope</span>
<span id="L299" class="LineNr"> 299 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L300" class="LineNr"> 300 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L301" class="LineNr"> 301 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L302" class="LineNr"> 302 </span>  $clear-trace
<span id="L303" class="LineNr"> 303 </span>  assume-console [
<span id="L304" class="LineNr"> 304 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span>  <span class="Comment"># on the 'b'</span>
<span id="L305" class="LineNr"> 305 </span>  ]
<span id="L306" class="LineNr"> 306 </span>  run [
<span id="L307" class="LineNr"> 307 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L308" class="LineNr"> 308 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L309" class="LineNr"> 309 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L310" class="LineNr"> 310 </span>  ]
<span id="L311" class="LineNr"> 311 </span>  screen-should-contain [
<span id="L312" class="LineNr"> 312 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L313" class="LineNr"> 313 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L314" class="LineNr"> 314 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L315" class="LineNr"> 315 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L316" class="LineNr"> 316 </span>  ]
<span id="L317" class="LineNr"> 317 </span>  memory-should-contain [
<span id="L318" class="LineNr"> 318 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># cursor is at row 0..</span>
<span id="L319" class="LineNr"> 319 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># ..and column 1</span>
<span id="L320" class="LineNr"> 320 </span>  ]
<span id="L321" class="LineNr"> 321 </span>  check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span>
<span id="L322" class="LineNr"> 322 </span>]
<span id="L323" class="LineNr"> 323 </span>
<span id="L324" class="LineNr"> 324 </span><span class="muScenario">scenario</span> editor-handles-mouse-clicks-outside-text [
<span id="L325" class="LineNr"> 325 </span>  <span class="Constant">local-scope</span>
<span id="L326" class="LineNr"> 326 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L327" class="LineNr"> 327 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L328" class="LineNr"> 328 </span>  $clear-trace
<span id="L329" class="LineNr"> 329 </span>  assume-console [
<span id="L330" class="LineNr"> 330 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span>  <span class="Comment"># last line, to the right of text</span>
<span id="L331" class="LineNr"> 331 </span>  ]
<span id="L332" class="LineNr"> 332 </span>  run [
<span id="L333" class="LineNr"> 333 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L334" class="LineNr"> 334 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L335" class="LineNr"> 335 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L336" class="LineNr"> 336 </span>  ]
<span id="L337" class="LineNr"> 337 </span>  memory-should-contain [
<span id="L338" class="LineNr"> 338 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># cursor row</span>
<span id="L339" class="LineNr"> 339 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># cursor column</span>
<span id="L340" class="LineNr"> 340 </span>  ]
<span id="L341" class="LineNr"> 341 </span>  check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span>
<span id="L342" class="LineNr"> 342 </span>]
<span id="L343" class="LineNr"> 343 </span>
<span id="L344" class="LineNr"> 344 </span><span class="muScenario">scenario</span> editor-handles-mouse-clicks-outside-text-2 [
<span id="L345" class="LineNr"> 345 </span>  <span class="Constant">local-scope</span>
<span id="L346" class="LineNr"> 346 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L347" class="LineNr"> 347 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abc</span>
<span id="L348" class="LineNr"> 348 </span><span class="Constant">def]</span>
<span id="L349" class="LineNr"> 349 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L350" class="LineNr"> 350 </span>  $clear-trace
<span id="L351" class="LineNr"> 351 </span>  assume-console [
<span id="L352" class="LineNr"> 352 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span>  <span class="Comment"># interior line, to the right of text</span>
<span id="L353" class="LineNr"> 353 </span>  ]
<span id="L354" class="LineNr"> 354 </span>  run [
<span id="L355" class="LineNr"> 355 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L356" class="LineNr"> 356 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L357" class="LineNr"> 357 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L358" class="LineNr"> 358 </span>  ]
<span id="L359" class="LineNr"> 359 </span>  memory-should-contain [
<span id="L360" class="LineNr"> 360 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># cursor row</span>
<span id="L361" class="LineNr"> 361 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># cursor column</span>
<span id="L362" class="LineNr"> 362 </span>  ]
<span id="L363" class="LineNr"> 363 </span>  check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span>
<span id="L364" class="LineNr"> 364 </span>]
<span id="L365" class="LineNr"> 365 </span>
<span id="L366" class="LineNr"> 366 </span><span class="muScenario">scenario</span> editor-handles-mouse-clicks-outside-text-3 [
<span id="L367" class="LineNr"> 367 </span>  <span class="Constant">local-scope</span>
<span id="L368" class="LineNr"> 368 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L369" class="LineNr"> 369 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abc</span>
<span id="L370" class="LineNr"> 370 </span><span class="Constant">def]</span>
<span id="L371" class="LineNr"> 371 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L372" class="LineNr"> 372 </span>  $clear-trace
<span id="L373" class="LineNr"> 373 </span>  assume-console [
<span id="L374" class="LineNr"> 374 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 7</span>  <span class="Comment"># below text</span>
<span id="L375" class="LineNr"> 375 </span>  ]
<span id="L376" class="LineNr"> 376 </span>  run [
<span id="L377" class="LineNr"> 377 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L378" class="LineNr"> 378 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L379" class="LineNr"> 379 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L380" class="LineNr"> 380 </span>  ]
<span id="L381" class="LineNr"> 381 </span>  memory-should-contain [
<span id="L382" class="LineNr"> 382 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 2</span>  <span class="Comment"># cursor row</span>
<span id="L383" class="LineNr"> 383 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># cursor column</span>
<span id="L384" class="LineNr"> 384 </span>  ]
<span id="L385" class="LineNr"> 385 </span>  check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span>
<span id="L386" class="LineNr"> 386 </span>]
<span id="L387" class="LineNr"> 387 </span>
<span id="L388" class="LineNr"> 388 </span><span class="muScenario">scenario</span> editor-handles-mouse-clicks-outside-column [
<span id="L389" class="LineNr"> 389 </span>  <span class="Constant">local-scope</span>
<span id="L390" class="LineNr"> 390 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L391" class="LineNr"> 391 </span>  <span class="Comment"># editor occupies only left half of screen</span>
<span id="L392" class="LineNr"> 392 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L393" class="LineNr"> 393 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L394" class="LineNr"> 394 </span>  $clear-trace
<span id="L395" class="LineNr"> 395 </span>  assume-console [
<span id="L396" class="LineNr"> 396 </span>  <span class="Conceal">¦</span> <span class="Comment"># click on right half of screen</span>
<span id="L397" class="LineNr"> 397 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 8</span>
<span id="L398" class="LineNr"> 398 </span>  ]
<span id="L399" class="LineNr"> 399 </span>  run [
<span id="L400" class="LineNr"> 400 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L401" class="LineNr"> 401 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L402" class="LineNr"> 402 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L403" class="LineNr"> 403 </span>  ]
<span id="L404" class="LineNr"> 404 </span>  screen-should-contain [
<span id="L405" class="LineNr"> 405 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L406" class="LineNr"> 406 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L407" class="LineNr"> 407 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L408" class="LineNr"> 408 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L409" class="LineNr"> 409 </span>  ]
<span id="L410" class="LineNr"> 410 </span>  memory-should-contain [
<span id="L411" class="LineNr"> 411 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># no change to cursor row</span>
<span id="L412" class="LineNr"> 412 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># ..or column</span>
<span id="L413" class="LineNr"> 413 </span>  ]
<span id="L414" class="LineNr"> 414 </span>  check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span>
<span id="L415" class="LineNr"> 415 </span>]
<span id="L416" class="LineNr"> 416 </span>
<span id="L417" class="LineNr"> 417 </span><span class="muScenario">scenario</span> editor-handles-mouse-clicks-in-menu-area [
<span id="L418" class="LineNr"> 418 </span>  <span class="Constant">local-scope</span>
<span id="L419" class="LineNr"> 419 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L420" class="LineNr"> 420 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L421" class="LineNr"> 421 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L422" class="LineNr"> 422 </span>  $clear-trace
<span id="L423" class="LineNr"> 423 </span>  assume-console [
<span id="L424" class="LineNr"> 424 </span>  <span class="Conceal">¦</span> <span class="Comment"># click on first, 'menu' row</span>
<span id="L425" class="LineNr"> 425 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 0</span>,<span class="Constant"> 3</span>
<span id="L426" class="LineNr"> 426 </span>  ]
<span id="L427" class="LineNr"> 427 </span>  run [
<span id="L428" class="LineNr"> 428 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L429" class="LineNr"> 429 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L430" class="LineNr"> 430 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L431" class="LineNr"> 431 </span>  ]
<span id="L432" class="LineNr"> 432 </span>  <span class="Comment"># no change to cursor</span>
<span id="L433" class="LineNr"> 433 </span>  memory-should-contain [
<span id="L434" class="LineNr"> 434 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>
<span id="L435" class="LineNr"> 435 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>
<span id="L436" class="LineNr"> 436 </span>  ]
<span id="L437" class="LineNr"> 437 </span>]
<span id="L438" class="LineNr"> 438 </span>
<span id="L439" class="LineNr"> 439 </span><span class="muScenario">scenario</span> editor-inserts-characters-into-empty-editor [
<span id="L440" class="LineNr"> 440 </span>  <span class="Constant">local-scope</span>
<span id="L441" class="LineNr"> 441 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L442" class="LineNr"> 442 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L443" class="LineNr"> 443 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L444" class="LineNr"> 444 </span>  $clear-trace
<span id="L445" class="LineNr"> 445 </span>  assume-console [
<span id="L446" class="LineNr"> 446 </span>  <span class="Conceal">¦</span> type <span class="Constant">[abc]</span>
<span id="L447" class="LineNr"> 447 </span>  ]
<span id="L448" class="LineNr"> 448 </span>  run [
<span id="L449" class="LineNr"> 449 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L450" class="LineNr"> 450 </span>  ]
<span id="L451" class="LineNr"> 451 </span>  screen-should-contain [
<span id="L452" class="LineNr"> 452 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L453" class="LineNr"> 453 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L454" class="LineNr"> 454 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L455" class="LineNr"> 455 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L456" class="LineNr"> 456 </span>  ]
<span id="L457" class="LineNr"> 457 </span>  check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span>
<span id="L458" class="LineNr"> 458 </span>]
<span id="L459" class="LineNr"> 459 </span>
<span id="L460" class="LineNr"> 460 </span><span class="muScenario">scenario</span> editor-inserts-characters-at-cursor [
<span id="L461" class="LineNr"> 461 </span>  <span class="Constant">local-scope</span>
<span id="L462" class="LineNr"> 462 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L463" class="LineNr"> 463 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L464" class="LineNr"> 464 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L465" class="LineNr"> 465 </span>  $clear-trace
<span id="L466" class="LineNr"> 466 </span>  <span class="Comment"># type two letters at different places</span>
<span id="L467" class="LineNr"> 467 </span>  assume-console [
<span id="L468" class="LineNr"> 468 </span>  <span class="Conceal">¦</span> type <span class="Constant">[0]</span>
<span id="L469" class="LineNr"> 469 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span>
<span id="L470" class="LineNr"> 470 </span>  <span class="Conceal">¦</span> type <span class="Constant">[d]</span>
<span id="L471" class="LineNr"> 471 </span>  ]
<span id="L472" class="LineNr"> 472 </span>  run [
<span id="L473" class="LineNr"> 473 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L474" class="LineNr"> 474 </span>  ]
<span id="L475" class="LineNr"> 475 </span>  screen-should-contain [
<span id="L476" class="LineNr"> 476 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L477" class="LineNr"> 477 </span>  <span class="Conceal">¦</span><span class="Constant"> .0adbc     .</span>
<span id="L478" class="LineNr"> 478 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L479" class="LineNr"> 479 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L480" class="LineNr"> 480 </span>  ]
<span id="L481" class="LineNr"> 481 </span>  check-trace-count-for-label<span class="Constant"> 7</span>, <span class="Constant">[print-character]</span>  <span class="Comment"># 4 for first letter, 3 for second</span>
<span id="L482" class="LineNr"> 482 </span>]
<span id="L483" class="LineNr"> 483 </span>
<span id="L484" class="LineNr"> 484 </span><span class="muScenario">scenario</span> editor-inserts-characters-at-cursor-2 [
<span id="L485" class="LineNr"> 485 </span>  <span class="Constant">local-scope</span>
<span id="L486" class="LineNr"> 486 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L487" class="LineNr"> 487 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L488" class="LineNr"> 488 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L489" class="LineNr"> 489 </span>  $clear-trace
<span id="L490" class="LineNr"> 490 </span>  assume-console [
<span id="L491" class="LineNr"> 491 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 5</span>  <span class="Comment"># right of last line</span>
<span id="L492" class="LineNr"> 492 </span>  <span class="Conceal">¦</span> type <span class="Constant">[d]</span>
<span id="L493" class="LineNr"> 493 </span>  ]
<span id="L494" class="LineNr"> 494 </span>  run [
<span id="L495" class="LineNr"> 495 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L496" class="LineNr"> 496 </span>  ]
<span id="L497" class="LineNr"> 497 </span>  screen-should-contain [
<span id="L498" class="LineNr"> 498 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L499" class="LineNr"> 499 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd      .</span>
<span id="L500" class="LineNr"> 500 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L501" class="LineNr"> 501 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L502" class="LineNr"> 502 </span>  ]
<span id="L503" class="LineNr"> 503 </span>  check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span>
<span id="L504" class="LineNr"> 504 </span>]
<span id="L505" class="LineNr"> 505 </span>
<span id="L506" class="LineNr"> 506 </span><span class="muScenario">scenario</span> editor-inserts-characters-at-cursor-5 [
<span id="L507" class="LineNr"> 507 </span>  <span class="Constant">local-scope</span>
<span id="L508" class="LineNr"> 508 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L509" class="LineNr"> 509 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abc</span>
<span id="L510" class="LineNr"> 510 </span><span class="Constant">d]</span>
<span id="L511" class="LineNr"> 511 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L512" class="LineNr"> 512 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L513" class="LineNr"> 513 </span>  $clear-trace
<span id="L514" class="LineNr"> 514 </span>  assume-console [
<span id="L515" class="LineNr"> 515 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 5</span>  <span class="Comment"># right of non-last line</span>
<span id="L516" class="LineNr"> 516 </span>  <span class="Conceal">¦</span> type <span class="Constant">[e]</span>
<span id="L517" class="LineNr"> 517 </span>  ]
<span id="L518" class="LineNr"> 518 </span>  run [
<span id="L519" class="LineNr"> 519 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L520" class="LineNr"> 520 </span>  ]
<span id="L521" class="LineNr"> 521 </span>  screen-should-contain [
<span id="L522" class="LineNr"> 522 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L523" class="LineNr"> 523 </span>  <span class="Conceal">¦</span><span class="Constant"> .abce      .</span>
<span id="L524" class="LineNr"> 524 </span>  <span class="Conceal">¦</span><span class="Constant"> .d         .</span>
<span id="L525" class="LineNr"> 525 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L526" class="LineNr"> 526 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L527" class="LineNr"> 527 </span>  ]
<span id="L528" class="LineNr"> 528 </span>  check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span>
<span id="L529" class="LineNr"> 529 </span>]
<span id="L530" class="LineNr"> 530 </span>
<span id="L531" class="LineNr"> 531 </span><span class="muScenario">scenario</span> editor-inserts-characters-at-cursor-3 [
<span id="L532" class="LineNr"> 532 </span>  <span class="Constant">local-scope</span>
<span id="L533" class="LineNr"> 533 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L534" class="LineNr"> 534 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L535" class="LineNr"> 535 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L536" class="LineNr"> 536 </span>  $clear-trace
<span id="L537" class="LineNr"> 537 </span>  assume-console [
<span id="L538" class="LineNr"> 538 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 5</span>  <span class="Comment"># below all text</span>
<span id="L539" class="LineNr"> 539 </span>  <span class="Conceal">¦</span> type <span class="Constant">[d]</span>
<span id="L540" class="LineNr"> 540 </span>  ]
<span id="L541" class="LineNr"> 541 </span>  run [
<span id="L542" class="LineNr"> 542 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L543" class="LineNr"> 543 </span>  ]
<span id="L544" class="LineNr"> 544 </span>  screen-should-contain [
<span id="L545" class="LineNr"> 545 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L546" class="LineNr"> 546 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd      .</span>
<span id="L547" class="LineNr"> 547 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L548" class="LineNr"> 548 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L549" class="LineNr"> 549 </span>  ]
<span id="L550" class="LineNr"> 550 </span>  check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span>
<span id="L551" class="LineNr"> 551 </span>]
<span id="L552" class="LineNr"> 552 </span>
<span id="L553" class="LineNr"> 553 </span><span class="muScenario">scenario</span> editor-inserts-characters-at-cursor-4 [
<span id="L554" class="LineNr"> 554 </span>  <span class="Constant">local-scope</span>
<span id="L555" class="LineNr"> 555 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L556" class="LineNr"> 556 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abc</span>
<span id="L557" class="LineNr"> 557 </span><span class="Constant">d]</span>
<span id="L558" class="LineNr"> 558 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L559" class="LineNr"> 559 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L560" class="LineNr"> 560 </span>  $clear-trace
<span id="L561" class="LineNr"> 561 </span>  assume-console [
<span id="L562" class="LineNr"> 562 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 5</span>  <span class="Comment"># below all text</span>
<span id="L563" class="LineNr"> 563 </span>  <span class="Conceal">¦</span> type <span class="Constant">[e]</span>
<span id="L564" class="LineNr"> 564 </span>  ]
<span id="L565" class="LineNr"> 565 </span>  run [
<span id="L566" class="LineNr"> 566 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L567" class="LineNr"> 567 </span>  ]
<span id="L568" class="LineNr"> 568 </span>  screen-should-contain [
<span id="L569" class="LineNr"> 569 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L570" class="LineNr"> 570 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L571" class="LineNr"> 571 </span>  <span class="Conceal">¦</span><span class="Constant"> .de        .</span>
<span id="L572" class="LineNr"> 572 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L573" class="LineNr"> 573 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L574" class="LineNr"> 574 </span>  ]
<span id="L575" class="LineNr"> 575 </span>  check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span>
<span id="L576" class="LineNr"> 576 </span>]
<span id="L577" class="LineNr"> 577 </span>
<span id="L578" class="LineNr"> 578 </span><span class="muScenario">scenario</span> editor-inserts-characters-at-cursor-6 [
<span id="L579" class="LineNr"> 579 </span>  <span class="Constant">local-scope</span>
<span id="L580" class="LineNr"> 580 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L581" class="LineNr"> 581 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abc</span>
<span id="L582" class="LineNr"> 582 </span><span class="Constant">d]</span>
<span id="L583" class="LineNr"> 583 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L584" class="LineNr"> 584 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L585" class="LineNr"> 585 </span>  $clear-trace
<span id="L586" class="LineNr"> 586 </span>  assume-console [
<span id="L587" class="LineNr"> 587 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 5</span>  <span class="Comment"># below all text</span>
<span id="L588" class="LineNr"> 588 </span>  <span class="Conceal">¦</span> type <span class="Constant">[ef]</span>
<span id="L589" class="LineNr"> 589 </span>  ]
<span id="L590" class="LineNr"> 590 </span>  run [
<span id="L591" class="LineNr"> 591 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L592" class="LineNr"> 592 </span>  ]
<span id="L593" class="LineNr"> 593 </span>  screen-should-contain [
<span id="L594" class="LineNr"> 594 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L595" class="LineNr"> 595 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L596" class="LineNr"> 596 </span>  <span class="Conceal">¦</span><span class="Constant"> .def       .</span>
<span id="L597" class="LineNr"> 597 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L598" class="LineNr"> 598 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L599" class="LineNr"> 599 </span>  ]
<span id="L600" class="LineNr"> 600 </span>  check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span>
<span id="L601" class="LineNr"> 601 </span>]
<span id="L602" class="LineNr"> 602 </span>
<span id="L603" class="LineNr"> 603 </span><span class="muScenario">scenario</span> editor-moves-cursor-after-inserting-characters [
<span id="L604" class="LineNr"> 604 </span>  <span class="Constant">local-scope</span>
<span id="L605" class="LineNr"> 605 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L606" class="LineNr"> 606 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L607" class="LineNr"> 607 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L608" class="LineNr"> 608 </span>  assume-console [
<span id="L609" class="LineNr"> 609 </span>  <span class="Conceal">¦</span> type <span class="Constant">[01]</span>
<span id="L610" class="LineNr"> 610 </span>  ]
<span id="L611" class="LineNr"> 611 </span>  run [
<span id="L612" class="LineNr"> 612 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L613" class="LineNr"> 613 </span>  ]
<span id="L614" class="LineNr"> 614 </span>  screen-should-contain [
<span id="L615" class="LineNr"> 615 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L616" class="LineNr"> 616 </span>  <span class="Conceal">¦</span><span class="Constant"> .01ab      .</span>
<span id="L617" class="LineNr"> 617 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L618" class="LineNr"> 618 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L619" class="LineNr"> 619 </span>  ]
<span id="L620" class="LineNr"> 620 </span>]
<span id="L621" class="LineNr"> 621 </span>
<span id="L622" class="LineNr"> 622 </span><span class="Comment"># if the cursor reaches the right margin, wrap the line</span>
<span id="L623" class="LineNr"> 623 </span>
<span id="L624" class="LineNr"> 624 </span><span class="muScenario">scenario</span> editor-wraps-line-on-insert [
<span id="L625" class="LineNr"> 625 </span>  <span class="Constant">local-scope</span>
<span id="L626" class="LineNr"> 626 </span>  assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span>
<span id="L627" class="LineNr"> 627 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L628" class="LineNr"> 628 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L629" class="LineNr"> 629 </span>  <span class="Comment"># type a letter</span>
<span id="L630" class="LineNr"> 630 </span>  assume-console [
<span id="L631" class="LineNr"> 631 </span>  <span class="Conceal">¦</span> type <span class="Constant">[e]</span>
<span id="L632" class="LineNr"> 632 </span>  ]
<span id="L633" class="LineNr"> 633 </span>  run [
<span id="L634" class="LineNr"> 634 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L635" class="LineNr"> 635 </span>  ]
<span id="L636" class="LineNr"> 636 </span>  <span class="Comment"># no wrap yet</span>
<span id="L637" class="LineNr"> 637 </span>  screen-should-contain [
<span id="L638" class="LineNr"> 638 </span>  <span class="Conceal">¦</span><span class="Constant"> .     .</span>
<span id="L639" class="LineNr"> 639 </span>  <span class="Conceal">¦</span><span class="Constant"> .eabc .</span>
<span id="L640" class="LineNr"> 640 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌.</span>
<span id="L641" class="LineNr"> 641 </span>  <span class="Conceal">¦</span><span class="Constant"> .     .</span>
<span id="L642" class="LineNr"> 642 </span>  <span class="Conceal">¦</span><span class="Constant"> .     .</span>
<span id="L643" class="LineNr"> 643 </span>  ]
<span id="L644" class="LineNr"> 644 </span>  <span class="Comment"># type a second letter</span>
<span id="L645" class="LineNr"> 645 </span>  assume-console [
<span id="L646" class="LineNr"> 646 </span>  <span class="Conceal">¦</span> type <span class="Constant">[f]</span>
<span id="L647" class="LineNr"> 647 </span>  ]
<span id="L648" class="LineNr"> 648 </span>  run [
<span id="L649" class="LineNr"> 649 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L650" class="LineNr"> 650 </span>  ]
<span id="L651" class="LineNr"> 651 </span>  <span class="Comment"># now wrap</span>
<span id="L652" class="LineNr"> 652 </span>  screen-should-contain [
<span id="L653" class="LineNr"> 653 </span>  <span class="Conceal">¦</span><span class="Constant"> .     .</span>
<span id="L654" class="LineNr"> 654 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .efab↩.</span>
<span id="L655" class="LineNr"> 655 </span>  <span class="Conceal">¦</span><span class="Constant"> .c    .</span>
<span id="L656" class="LineNr"> 656 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌.</span>
<span id="L657" class="LineNr"> 657 </span>  <span class="Conceal">¦</span><span class="Constant"> .     .</span>
<span id="L658" class="LineNr"> 658 </span>  ]
<span id="L659" class="LineNr"> 659 </span>]
<span id="L660" class="LineNr"> 660 </span>
<span id="L661" class="LineNr"> 661 </span><span class="muScenario">scenario</span> editor-wraps-line-on-insert-2 [
<span id="L662" class="LineNr"> 662 </span>  <span class="Constant">local-scope</span>
<span id="L663" class="LineNr"> 663 </span>  <span class="Comment"># create an editor with some text</span>
<span id="L664" class="LineNr"> 664 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L665" class="LineNr"> 665 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abcdefg</span>
<span id="L666" class="LineNr"> 666 </span><span class="Constant">defg]</span>
<span id="L667" class="LineNr"> 667 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L668" class="LineNr"> 668 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L669" class="LineNr"> 669 </span>  <span class="Comment"># type more text at the start</span>
<span id="L670" class="LineNr"> 670 </span>  assume-console [
<span id="L671" class="LineNr"> 671 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
<span id="L672" class="LineNr"> 672 </span>  <span class="Conceal">¦</span> type <span class="Constant">[abc]</span>
<span id="L673" class="LineNr"> 673 </span>  ]
<span id="L674" class="LineNr"> 674 </span>  run [
<span id="L675" class="LineNr"> 675 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L676" class="LineNr"> 676 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L677" class="LineNr"> 677 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L678" class="LineNr"> 678 </span>  ]
<span id="L679" class="LineNr"> 679 </span>  <span class="Comment"># cursor is not wrapped</span>
<span id="L680" class="LineNr"> 680 </span>  memory-should-contain [
<span id="L681" class="LineNr"> 681 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
<span id="L682" class="LineNr"> 682 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
<span id="L683" class="LineNr"> 683 </span>  ]
<span id="L684" class="LineNr"> 684 </span>  <span class="Comment"># but line is wrapped</span>
<span id="L685" class="LineNr"> 685 </span>  screen-should-contain [
<span id="L686" class="LineNr"> 686 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L687" class="LineNr"> 687 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd↩     .</span>
<span id="L688" class="LineNr"> 688 </span>  <span class="Conceal">¦</span><span class="Constant"> .efg       .</span>
<span id="L689" class="LineNr"> 689 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd↩     .</span>
<span id="L690" class="LineNr"> 690 </span>  <span class="Conceal">¦</span><span class="Constant"> .efg       .</span>
<span id="L691" class="LineNr"> 691 </span>  ]
<span id="L692" class="LineNr"> 692 </span>]
<span id="L693" class="LineNr"> 693 </span>
<span id="L694" class="LineNr"> 694 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L219'>&lt;insert-character-special-case&gt;</a></span> [
<span id="L695" class="LineNr"> 695 </span>  <span class="Comment"># if the line wraps at the cursor, move cursor to start of next row</span>
<span id="L696" class="LineNr"> 696 </span>  <span class="Delimiter">{</span>
<span id="L697" class="LineNr"> 697 </span>  <span class="Conceal">¦</span> <span class="Comment"># if either:</span>
<span id="L698" class="LineNr"> 698 </span>  <span class="Conceal">¦</span> <span class="Comment"># a) we're at the end of the line and at the column of the wrap indicator, or</span>
<span id="L699" class="LineNr"> 699 </span>  <span class="Conceal">¦</span> <span class="Comment"># b) we're not at end of line and just before the column of the wrap indicator</span>
<span id="L700" class="LineNr"> 700 </span>  <span class="Conceal">¦</span> wrap-column:num <span class="Special">&lt;-</span> copy right
<span id="L701" class="LineNr"> 701 </span>  <span class="Conceal">¦</span> before-wrap-column:num <span class="Special">&lt;-</span> subtract wrap-column,<span class="Constant"> 1</span>
<span id="L702" class="LineNr"> 702 </span>  <span class="Conceal">¦</span> at-wrap?:bool <span class="Special">&lt;-</span> greater-or-equal cursor-column, wrap-column
<span id="L703" class="LineNr"> 703 </span>  <span class="Conceal">¦</span> just-before-wrap?:bool <span class="Special">&lt;-</span> greater-or-equal cursor-column, before-wrap-column
<span id="L704" class="LineNr"> 704 </span>  <span class="Conceal">¦</span> <a href='../065duplex_list.mu.html#L29'>next</a>:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> before-cursor
<span id="L705" class="LineNr"> 705 </span>  <span class="Conceal">¦</span> <span class="Comment"># at end of line? next == 0 || next.value == 10/newline</span>
<span id="L706" class="LineNr"> 706 </span>  <span class="Conceal">¦</span> at-end-of-line?:bool <span class="Special">&lt;-</span> equal <a href='../065duplex_list.mu.html#L29'>next</a>,<span class="Constant"> 0</span>
<span id="L707" class="LineNr"> 707 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L708" class="LineNr"> 708 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-if</span> at-end-of-line?
<span id="L709" class="LineNr"> 709 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> next-character:char <span class="Special">&lt;-</span> get *next, <span class="Constant">value:offset</span>
<span id="L710" class="LineNr"> 710 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> at-end-of-line? <span class="Special">&lt;-</span> equal next-character, <span class="Constant">10/newline</span>
<span id="L711" class="LineNr"> 711 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L712" class="LineNr"> 712 </span>  <span class="Conceal">¦</span> <span class="Comment"># break unless ((eol? and at-wrap?) or (~eol? and just-before-wrap?))</span>
<span id="L713" class="LineNr"> 713 </span>  <span class="Conceal">¦</span> move-cursor-to-next-line?:bool <span class="Special">&lt;-</span> copy <span class="Constant">0/false</span>
<span id="L714" class="LineNr"> 714 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L715" class="LineNr"> 715 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-if</span> at-end-of-line?
<span id="L716" class="LineNr"> 716 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> move-cursor-to-next-line? <span class="Special">&lt;-</span> copy just-before-wrap?
<span id="L717" class="LineNr"> 717 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># if we're moving the cursor because it's in the middle of a wrapping</span>
<span id="L718" class="LineNr"> 718 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># line, adjust it to left-most column</span>
<span id="L719" class="LineNr"> 719 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> potential-new-cursor-column:num <span class="Special">&lt;-</span> copy left
<span id="L720" class="LineNr"> 720 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L721" class="LineNr"> 721 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L722" class="LineNr"> 722 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> at-end-of-line?
<span id="L723" class="LineNr"> 723 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> move-cursor-to-next-line? <span class="Special">&lt;-</span> copy at-wrap?
<span id="L724" class="LineNr"> 724 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># if we're moving the cursor because it's at the end of a wrapping line,</span>
<span id="L725" class="LineNr"> 725 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># adjust it to one past the left-most column to make room for the</span>
<span id="L726" class="LineNr"> 726 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment"># newly-inserted wrap-indicator</span>
<span id="L727" class="LineNr"> 727 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> potential-new-cursor-column:num <span class="Special">&lt;-</span> add left, <span class="Constant">1/make-room-for-wrap-indicator</span>
<span id="L728" class="LineNr"> 728 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L729" class="LineNr"> 729 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> move-cursor-to-next-line?
<span id="L730" class="LineNr"> 730 </span>  <span class="Conceal">¦</span> cursor-column <span class="Special">&lt;-</span> copy potential-new-cursor-column
<span id="L731" class="LineNr"> 731 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column
<span id="L732" class="LineNr"> 732 </span>  <span class="Conceal">¦</span> cursor-row <span class="Special">&lt;-</span> add cursor-row,<span class="Constant"> 1</span>
<span id="L733" class="LineNr"> 733 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row
<span id="L734" class="LineNr"> 734 </span>  <span class="Conceal">¦</span> <span class="Comment"># if we're out of the screen, scroll down</span>
<span id="L735" class="LineNr"> 735 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L736" class="LineNr"> 736 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> below-screen?:bool <span class="Special">&lt;-</span> greater-or-equal cursor-row, <a href='../081print.mu.html#L782'>screen-height</a>
<span id="L737" class="LineNr"> 737 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> below-screen?
<span id="L738" class="LineNr"> 738 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> </span><span class="Conceal">¦</span><span class="Constant"> &lt;scroll-down&gt;</span>
<span id="L739" class="LineNr"> 739 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L740" class="LineNr"> 740 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">1/go-render</span>
<span id="L741" class="LineNr"> 741 </span>  <span class="Delimiter">}</span>
<span id="L742" class="LineNr"> 742 </span>]
<span id="L743" class="LineNr"> 743 </span>
<span id="L744" class="LineNr"> 744 </span><span class="muScenario">scenario</span> editor-wraps-cursor-after-inserting-characters-in-middle-of-line [
<span id="L745" class="LineNr"> 745 </span>  <span class="Constant">local-scope</span>
<span id="L746" class="LineNr"> 746 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L747" class="LineNr"> 747 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abcde]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L748" class="LineNr"> 748 </span>  assume-console [
<span id="L749" class="LineNr"> 749 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span>  <span class="Comment"># right before the wrap icon</span>
<span id="L750" class="LineNr"> 750 </span>  <span class="Conceal">¦</span> type <span class="Constant">[f]</span>
<span id="L751" class="LineNr"> 751 </span>  ]
<span id="L752" class="LineNr"> 752 </span>  run [
<span id="L753" class="LineNr"> 753 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L754" class="LineNr"> 754 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L755" class="LineNr"> 755 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L756" class="LineNr"> 756 </span>  ]
<span id="L757" class="LineNr"> 757 </span>  screen-should-contain [
<span id="L758" class="LineNr"> 758 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L759" class="LineNr"> 759 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcf↩     .</span>
<span id="L760" class="LineNr"> 760 </span>  <span class="Conceal">¦</span><span class="Constant"> .de        .</span>
<span id="L761" class="LineNr"> 761 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L762" class="LineNr"> 762 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L763" class="LineNr"> 763 </span>  ]
<span id="L764" class="LineNr"> 764 </span>  memory-should-contain [
<span id="L765" class="LineNr"> 765 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 2</span>  <span class="Comment"># cursor row</span>
<span id="L766" class="LineNr"> 766 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># cursor column</span>
<span id="L767" class="LineNr"> 767 </span>  ]
<span id="L768" class="LineNr"> 768 </span>]
<span id="L769" class="LineNr"> 769 </span>
<span id="L770" class="LineNr"> 770 </span><span class="muScenario">scenario</span> editor-wraps-cursor-after-inserting-characters-at-end-of-line [
<span id="L771" class="LineNr"> 771 </span>  <span class="Constant">local-scope</span>
<span id="L772" class="LineNr"> 772 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L773" class="LineNr"> 773 </span>  <span class="Comment"># create an editor containing two lines</span>
<span id="L774" class="LineNr"> 774 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[abc</span>
<span id="L775" class="LineNr"> 775 </span><span class="Constant">xyz]</span>
<span id="L776" class="LineNr"> 776 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L777" class="LineNr"> 777 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L778" class="LineNr"> 778 </span>  screen-should-contain [
<span id="L779" class="LineNr"> 779 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L780" class="LineNr"> 780 </span>  <span class="Conceal">¦</span><span class="Constant"> .abc       .</span>
<span id="L781" class="LineNr"> 781 </span>  <span class="Conceal">¦</span><span class="Constant"> .xyz       .</span>
<span id="L782" class="LineNr"> 782 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L783" class="LineNr"> 783 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L784" class="LineNr"> 784 </span>  ]
<span id="L785" class="LineNr"> 785 </span>  assume-console [
<span id="L786" class="LineNr"> 786 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 4</span>  <span class="Comment"># at end of first line</span>
<span id="L787" class="LineNr"> 787 </span>  <span class="Conceal">¦</span> type <span class="Constant">[de]</span>  <span class="Comment"># trigger wrap</span>
<span id="L788" class="LineNr"> 788 </span>  ]
<span id="L789" class="LineNr"> 789 </span>  run [
<span id="L790" class="LineNr"> 790 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L791" class="LineNr"> 791 </span>  ]
<span id="L792" class="LineNr"> 792 </span>  screen-should-contain [
<span id="L793" class="LineNr"> 793 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L794" class="LineNr"> 794 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd↩     .</span>
<span id="L795" class="LineNr"> 795 </span>  <span class="Conceal">¦</span><span class="Constant"> .e         .</span>
<span id="L796" class="LineNr"> 796 </span>  <span class="Conceal">¦</span><span class="Constant"> .xyz       .</span>
<span id="L797" class="LineNr"> 797 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L798" class="LineNr"> 798 </span>  ]
<span id="L799" class="LineNr"> 799 </span>]
<span id="L800" class="LineNr"> 800 </span>
<span id="L801" class="LineNr"> 801 </span><span class="muScenario">scenario</span> editor-wraps-cursor-to-left-margin [
<span id="L802" class="LineNr"> 802 </span>  <span class="Constant">local-scope</span>
<span id="L803" class="LineNr"> 803 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L804" class="LineNr"> 804 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abcde]</span>, <span class="Constant">2/left</span>, <span class="Constant">7/right</span>
<span id="L805" class="LineNr"> 805 </span>  assume-console [
<span id="L806" class="LineNr"> 806 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 5</span>  <span class="Comment"># line is full; no wrap icon yet</span>
<span id="L807" class="LineNr"> 807 </span>  <span class="Conceal">¦</span> type <span class="Constant">[01]</span>
<span id="L808" class="LineNr"> 808 </span>  ]
<span id="L809" class="LineNr"> 809 </span>  run [
<span id="L810" class="LineNr"> 810 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L811" class="LineNr"> 811 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L812" class="LineNr"> 812 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L813" class="LineNr"> 813 </span>  ]
<span id="L814" class="LineNr"> 814 </span>  screen-should-contain [
<span id="L815" class="LineNr"> 815 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L816" class="LineNr"> 816 </span>  <span class="Conceal">¦</span><span class="Constant"> .  abc0↩   .</span>
<span id="L817" class="LineNr"> 817 </span>  <span class="Conceal">¦</span><span class="Constant"> .  1de     .</span>
<span id="L818" class="LineNr"> 818 </span>  <span class="Conceal">¦</span><span class="Constant"> .  ╌╌╌╌╌   .</span>
<span id="L819" class="LineNr"> 819 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L820" class="LineNr"> 820 </span>  ]
<span id="L821" class="LineNr"> 821 </span>  memory-should-contain [
<span id="L822" class="LineNr"> 822 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 2</span>  <span class="Comment"># cursor row</span>
<span id="L823" class="LineNr"> 823 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># cursor column</span>
<span id="L824" class="LineNr"> 824 </span>  ]
<span id="L825" class="LineNr"> 825 </span>]
<span id="L826" class="LineNr"> 826 </span>
<span id="L827" class="LineNr"> 827 </span><span class="Comment"># if newline, move cursor to start of next line, and maybe align indent with previous line</span>
<span id="L828" class="LineNr"> 828 </span>
<span id="L829" class="LineNr"> 829 </span><span class="muData">container</span> editor [
<span id="L830" class="LineNr"> 830 </span>  indent?:bool
<span id="L831" class="LineNr"> 831 </span>]
<span id="L832" class="LineNr"> 832 </span>
<span id="L833" class="LineNr"> 833 </span><span class="muRecipe">after</span> <span class="Constant"><a href='001-editor.mu.html#L69'>&lt;editor-initialization&gt;</a></span> [
<span id="L834" class="LineNr"> 834 </span>  *result <span class="Special">&lt;-</span> put *result, <span class="Constant">indent?:offset</span>, <span class="Constant">1/true</span>
<span id="L835" class="LineNr"> 835 </span>]
<span id="L836" class="LineNr"> 836 </span>
<span id="L837" class="LineNr"> 837 </span><span class="muScenario">scenario</span> editor-moves-cursor-down-after-inserting-newline [
<span id="L838" class="LineNr"> 838 </span>  <span class="Constant">local-scope</span>
<span id="L839" class="LineNr"> 839 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L840" class="LineNr"> 840 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L841" class="LineNr"> 841 </span>  assume-console [
<span id="L842" class="LineNr"> 842 </span>  <span class="Conceal">¦</span> type <span class="Constant">[0</span>
<span id="L843" class="LineNr"> 843 </span><span class="Constant">1]</span>
<span id="L844" class="LineNr"> 844 </span>  ]
<span id="L845" class="LineNr"> 845 </span>  run [
<span id="L846" class="LineNr"> 846 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L847" class="LineNr"> 847 </span>  ]
<span id="L848" class="LineNr"> 848 </span>  screen-should-contain [
<span id="L849" class="LineNr"> 849 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L850" class="LineNr"> 850 </span>  <span class="Conceal">¦</span><span class="Constant"> .0         .</span>
<span id="L851" class="LineNr"> 851 </span>  <span class="Conceal">¦</span><span class="Constant"> .1abc      .</span>
<span id="L852" class="LineNr"> 852 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span>
<span id="L853" class="LineNr"> 853 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L854" class="LineNr"> 854 </span>  ]
<span id="L855" class="LineNr"> 855 </span>]
<span id="L856" class="LineNr"> 856 </span>
<span id="L857" class="LineNr"> 857 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'>&lt;handle-special-character&gt;</a></span> [
<span id="L858" class="LineNr"> 858 </span>  <span class="Delimiter">{</span>
<span id="L859" class="LineNr"> 859 </span>  <span class="Conceal">¦</span> newline?:bool <span class="Special">&lt;-</span> equal c, <span class="Constant">10/newline</span>
<span id="L860" class="LineNr"> 860 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> newline?
<span id="L861" class="LineNr"> 861 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> <a href='002-typing.mu.html#L861'>&lt;begin-insert-enter&gt;</a></span>
<span id="L862" class="LineNr"> 862 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L868'>insert-new-line-and-indent</a> editor, <a href='../081print.mu.html#L16'>screen</a>
<span id="L863" class="LineNr"> 863 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> <a href='002-typing.mu.html#L863'>&lt;end-insert-enter&gt;</a></span>
<span id="L864" class="LineNr"> 864 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">1/go-render</span>
<span id="L865" class="LineNr"> 865 </span>  <span class="Delimiter">}</span>
<span id="L866" class="LineNr"> 866 </span>]
<span id="L867" class="LineNr"> 867 </span>
<span id="L868" class="LineNr"> 868 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L868'>insert-new-line-and-indent</a> editor:&amp;:editor, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a><span class="muRecipe"> -&gt; </span>editor:&amp;:editor, <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a> [
<span id="L869" class="LineNr"> 869 </span>  <span class="Constant">local-scope</span>
<span id="L870" class="LineNr"> 870 </span>  <span class="Constant">load-ingredients</span>
<span id="L871" class="LineNr"> 871 </span>  cursor-row:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-row:offset</span>
<span id="L872" class="LineNr"> 872 </span>  cursor-column:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-column:offset</span>
<span id="L873" class="LineNr"> 873 </span>  before-cursor:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">before-cursor:offset</span>
<span id="L874" class="LineNr"> 874 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L875" class="LineNr"> 875 </span>  right:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">right:offset</span>
<span id="L876" class="LineNr"> 876 </span>  <a href='../081print.mu.html#L782'>screen-height</a>:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L782'>screen-height</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L877" class="LineNr"> 877 </span>  <span class="Comment"># update cursor coordinates</span>
<span id="L878" class="LineNr"> 878 </span>  <a href='002-typing.mu.html#L914'>at-start-of-wrapped-line?</a>:bool <span class="Special">&lt;-</span> <a href='002-typing.mu.html#L914'>at-start-of-wrapped-line?</a> editor
<span id="L879" class="LineNr"> 879 </span>  <span class="Delimiter">{</span>
<span id="L880" class="LineNr"> 880 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> <a href='002-typing.mu.html#L914'>at-start-of-wrapped-line?</a>
<span id="L881" class="LineNr"> 881 </span>  <span class="Conceal">¦</span> cursor-row <span class="Special">&lt;-</span> add cursor-row,<span class="Constant"> 1</span>
<span id="L882" class="LineNr"> 882 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row
<span id="L883" class="LineNr"> 883 </span>  <span class="Delimiter">}</span>
<span id="L884" class="LineNr"> 884 </span>  cursor-column <span class="Special">&lt;-</span> copy left
<span id="L885" class="LineNr"> 885 </span>  *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column
<span id="L886" class="LineNr"> 886 </span>  <span class="Comment"># maybe scroll</span>
<span id="L887" class="LineNr"> 887 </span>  <span class="Delimiter">{</span>
<span id="L888" class="LineNr"> 888 </span>  <span class="Conceal">¦</span> below-screen?:bool <span class="Special">&lt;-</span> greater-or-equal cursor-row, <a href='../081print.mu.html#L782'>screen-height</a>  <span class="Comment"># must be equal, never greater</span>
<span id="L889" class="LineNr"> 889 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> below-screen?
<span id="L890" class="LineNr"> 890 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> &lt;scroll-down&gt;</span>
<span id="L891" class="LineNr"> 891 </span>  <span class="Conceal">¦</span> cursor-row <span class="Special">&lt;-</span> subtract cursor-row,<span class="Constant"> 1</span>  <span class="Comment"># bring back into screen range</span>
<span id="L892" class="LineNr"> 892 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row
<span id="L893" class="LineNr"> 893 </span>  <span class="Delimiter">}</span>
<span id="L894" class="LineNr"> 894 </span>  <span class="Comment"># insert newline</span>
<span id="L895" class="LineNr"> 895 </span>  insert <span class="Constant">10/newline</span>, before-cursor
<span id="L896" class="LineNr"> 896 </span>  before-cursor <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L29'>next</a> before-cursor
<span id="L897" class="LineNr"> 897 </span>  *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor
<span id="L898" class="LineNr"> 898 </span>  <span class="Comment"># indent if necessary</span>
<span id="L899" class="LineNr"> 899 </span>  indent?:bool <span class="Special">&lt;-</span> get *editor, <span class="Constant">indent?:offset</span>
<span id="L900" class="LineNr"> 900 </span>  <span class="muControl">return-unless</span> indent?
<span id="L901" class="LineNr"> 901 </span>  d:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">data:offset</span>
<span id="L902" class="LineNr"> 902 </span>  end-of-previous-line:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L36'>prev</a> before-cursor
<span id="L903" class="LineNr"> 903 </span>  indent:num <span class="Special">&lt;-</span> <a href='002-typing.mu.html#L934'>line-indent</a> end-of-previous-line, d
<span id="L904" class="LineNr"> 904 </span>  i:num <span class="Special">&lt;-</span> copy<span class="Constant"> 0</span>
<span id="L905" class="LineNr"> 905 </span>  <span class="Delimiter">{</span>
<span id="L906" class="LineNr"> 906 </span>  <span class="Conceal">¦</span> indent-done?:bool <span class="Special">&lt;-</span> greater-or-equal i, indent
<span id="L907" class="LineNr"> 907 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> indent-done?
<span id="L908" class="LineNr"> 908 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L203'>insert-at-cursor</a> editor, <span class="Constant">32/space</span>, <a href='../081print.mu.html#L16'>screen</a>
<span id="L909" class="LineNr"> 909 </span>  <span class="Conceal">¦</span> i <span class="Special">&lt;-</span> add i,<span class="Constant"> 1</span>
<span id="L910" class="LineNr"> 910 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span>
<span id="L911" class="LineNr"> 911 </span>  <span class="Delimiter">}</span>
<span id="L912" class="LineNr"> 912 </span>]
<span id="L913" class="LineNr"> 913 </span>
<span id="L914" class="LineNr"> 914 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L914'>at-start-of-wrapped-line?</a> editor:&amp;:editor<span class="muRecipe"> -&gt; </span>result:bool [
<span id="L915" class="LineNr"> 915 </span>  <span class="Constant">local-scope</span>
<span id="L916" class="LineNr"> 916 </span>  <span class="Constant">load-ingredients</span>
<span id="L917" class="LineNr"> 917 </span>  left:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">left:offset</span>
<span id="L918" class="LineNr"> 918 </span>  cursor-column:num <span class="Special">&lt;-</span> get *editor, <span class="Constant">cursor-column:offset</span>
<span id="L919" class="LineNr"> 919 </span>  cursor-at-left?:bool <span class="Special">&lt;-</span> equal cursor-column, left
<span id="L920" class="LineNr"> 920 </span>  <span class="muControl">return-unless</span> cursor-at-left?, <span class="Constant">0/false</span>
<span id="L921" class="LineNr"> 921 </span>  before-cursor:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> get *editor, <span class="Constant">before-cursor:offset</span>
<span id="L922" class="LineNr"> 922 </span>  before-before-cursor:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L36'>prev</a> before-cursor
<span id="L923" class="LineNr"> 923 </span>  <span class="muControl">return-unless</span> before-before-cursor, <span class="Constant">0/false</span>  <span class="Comment"># cursor is at start of editor</span>
<span id="L924" class="LineNr"> 924 </span>  char-before-cursor:char <span class="Special">&lt;-</span> get *before-cursor, <span class="Constant">value:offset</span>
<span id="L925" class="LineNr"> 925 </span>  cursor-after-newline?:bool <span class="Special">&lt;-</span> equal char-before-cursor, <span class="Constant">10/newline</span>
<span id="L926" class="LineNr"> 926 </span>  <span class="muControl">return-if</span> cursor-after-newline?, <span class="Constant">0/false</span>
<span id="L927" class="LineNr"> 927 </span>  <span class="Comment"># if cursor is at left margin and not at start, but previous character is not a newline,</span>
<span id="L928" class="LineNr"> 928 </span>  <span class="Comment"># then we're at start of a wrapped line</span>
<span id="L929" class="LineNr"> 929 </span>  <span class="muControl">return</span> <span class="Constant">1/true</span>
<span id="L930" class="LineNr"> 930 </span>]
<span id="L931" class="LineNr"> 931 </span>
<span id="L932" class="LineNr"> 932 </span><span class="Comment"># takes a pointer 'curr' into the doubly-linked list and its sentinel, counts</span>
<span id="L933" class="LineNr"> 933 </span><span class="Comment"># the number of spaces at the start of the line containing 'curr'.</span>
<span id="L934" class="LineNr"> 934 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L934'>line-indent</a> curr:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char, start:&amp;:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char<span class="muRecipe"> -&gt; </span>result:num [
<span id="L935" class="LineNr"> 935 </span>  <span class="Constant">local-scope</span>
<span id="L936" class="LineNr"> 936 </span>  <span class="Constant">load-ingredients</span>
<span id="L937" class="LineNr"> 937 </span>  result:num <span class="Special">&lt;-</span> copy<span class="Constant"> 0</span>
<span id="L938" class="LineNr"> 938 </span>  <span class="muControl">return-unless</span> curr
<span id="L939" class="LineNr"> 939 </span>  at-start?:bool <span class="Special">&lt;-</span> equal curr, start
<span id="L940" class="LineNr"> 940 </span>  <span class="muControl">return-if</span> at-start?
<span id="L941" class="LineNr"> 941 </span>  <span class="Delimiter">{</span>
<span id="L942" class="LineNr"> 942 </span>  <span class="Conceal">¦</span> curr <span class="Special">&lt;-</span> <a href='../065duplex_list.mu.html#L36'>prev</a> curr
<span id="L943" class="LineNr"> 943 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> curr
<span id="L944" class="LineNr"> 944 </span>  <span class="Conceal">¦</span> at-start?:bool <span class="Special">&lt;-</span> equal curr, start
<span id="L945" class="LineNr"> 945 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> at-start?
<span id="L946" class="LineNr"> 946 </span>  <span class="Conceal">¦</span> c:char <span class="Special">&lt;-</span> get *curr, <span class="Constant">value:offset</span>
<span id="L947" class="LineNr"> 947 </span>  <span class="Conceal">¦</span> at-newline?:bool <span class="Special">&lt;-</span> equal c, <span class="Constant">10/newline</span>
<span id="L948" class="LineNr"> 948 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> at-newline?
<span id="L949" class="LineNr"> 949 </span>  <span class="Conceal">¦</span> <span class="Comment"># if c is a space, increment result</span>
<span id="L950" class="LineNr"> 950 </span>  <span class="Conceal">¦</span> is-space?:bool <span class="Special">&lt;-</span> equal c, <span class="Constant">32/space</span>
<span id="L951" class="LineNr"> 951 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L952" class="LineNr"> 952 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-unless</span> is-space?
<span id="L953" class="LineNr"> 953 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> result <span class="Special">&lt;-</span> add result,<span class="Constant"> 1</span>
<span id="L954" class="LineNr"> 954 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L955" class="LineNr"> 955 </span>  <span class="Conceal">¦</span> <span class="Comment"># if c is not a space, reset result</span>
<span id="L956" class="LineNr"> 956 </span>  <span class="Conceal">¦</span> <span class="Delimiter">{</span>
<span id="L957" class="LineNr"> 957 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="muControl">break-if</span> is-space?
<span id="L958" class="LineNr"> 958 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> result <span class="Special">&lt;-</span> copy<span class="Constant"> 0</span>
<span id="L959" class="LineNr"> 959 </span>  <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L960" class="LineNr"> 960 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span>
<span id="L961" class="LineNr"> 961 </span>  <span class="Delimiter">}</span>
<span id="L962" class="LineNr"> 962 </span>]
<span id="L963" class="LineNr"> 963 </span>
<span id="L964" class="LineNr"> 964 </span><span class="muScenario">scenario</span> editor-moves-cursor-down-after-inserting-newline-2 [
<span id="L965" class="LineNr"> 965 </span>  <span class="Constant">local-scope</span>
<span id="L966" class="LineNr"> 966 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L967" class="LineNr"> 967 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abc]</span>, <span class="Constant">1/left</span>, <span class="Constant">10/right</span>
<span id="L968" class="LineNr"> 968 </span>  assume-console [
<span id="L969" class="LineNr"> 969 </span>  <span class="Conceal">¦</span> type <span class="Constant">[0</span>
<span id="L970" class="LineNr"> 970 </span><span class="Constant">1]</span>
<span id="L971" class="LineNr"> 971 </span>  ]
<span id="L972" class="LineNr"> 972 </span>  run [
<span id="L973" class="LineNr"> 973 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L974" class="LineNr"> 974 </span>  ]
<span id="L975" class="LineNr"> 975 </span>  screen-should-contain [
<span id="L976" class="LineNr"> 976 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L977" class="LineNr"> 977 </span>  <span class="Conceal">¦</span><span class="Constant"> . 0        .</span>
<span id="L978" class="LineNr"> 978 </span>  <span class="Conceal">¦</span><span class="Constant"> . 1abc     .</span>
<span id="L979" class="LineNr"> 979 </span>  <span class="Conceal">¦</span><span class="Constant"> . ╌╌╌╌╌╌╌╌╌.</span>
<span id="L980" class="LineNr"> 980 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L981" class="LineNr"> 981 </span>  ]
<span id="L982" class="LineNr"> 982 </span>]
<span id="L983" class="LineNr"> 983 </span>
<span id="L984" class="LineNr"> 984 </span><span class="muScenario">scenario</span> editor-clears-previous-line-completely-after-inserting-newline [
<span id="L985" class="LineNr"> 985 </span>  <span class="Constant">local-scope</span>
<span id="L986" class="LineNr"> 986 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L987" class="LineNr"> 987 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abcde]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L988" class="LineNr"> 988 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L989" class="LineNr"> 989 </span>  screen-should-contain [
<span id="L990" class="LineNr"> 990 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L991" class="LineNr"> 991 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd↩     .</span>
<span id="L992" class="LineNr"> 992 </span>  <span class="Conceal">¦</span><span class="Constant"> .e         .</span>
<span id="L993" class="LineNr"> 993 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L994" class="LineNr"> 994 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L995" class="LineNr"> 995 </span>  ]
<span id="L996" class="LineNr"> 996 </span>  assume-console [
<span id="L997" class="LineNr"> 997 </span>  <span class="Conceal">¦</span> press enter
<span id="L998" class="LineNr"> 998 </span>  ]
<span id="L999" class="LineNr"> 999 </span>  run [
<span id="L1000" class="LineNr">1000 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L1001" class="LineNr">1001 </span>  ]
<span id="L1002" class="LineNr">1002 </span>  <span class="Comment"># line should be fully cleared</span>
<span id="L1003" class="LineNr">1003 </span>  screen-should-contain [
<span id="L1004" class="LineNr">1004 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L1005" class="LineNr">1005 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L1006" class="LineNr">1006 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd↩     .</span>
<span id="L1007" class="LineNr">1007 </span>  <span class="Conceal">¦</span><span class="Constant"> .e         .</span>
<span id="L1008" class="LineNr">1008 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L1009" class="LineNr">1009 </span>  ]
<span id="L1010" class="LineNr">1010 </span>]
<span id="L1011" class="LineNr">1011 </span>
<span id="L1012" class="LineNr">1012 </span><span class="muScenario">scenario</span> editor-splits-wrapped-line-after-inserting-newline [
<span id="L1013" class="LineNr">1013 </span>  <span class="Constant">local-scope</span>
<span id="L1014" class="LineNr">1014 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
<span id="L1015" class="LineNr">1015 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abcdef]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
<span id="L1016" class="LineNr">1016 </span>  <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e
<span id="L1017" class="LineNr">1017 </span>  screen-should-contain [
<span id="L1018" class="LineNr">1018 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L1019" class="LineNr">1019 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd↩     .</span>
<span id="L1020" class="LineNr">1020 </span>  <span class="Conceal">¦</span><span class="Constant"> .ef        .</span>
<span id="L1021" class="LineNr">1021 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L1022" class="LineNr">1022 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L1023" class="LineNr">1023 </span>  ]
<span id="L1024" class="LineNr">1024 </span>  assume-console [
<span id="L1025" class="LineNr">1025 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span>
<span id="L1026" class="LineNr">1026 </span>  <span class="Conceal">¦</span> press enter
<span id="L1027" class="LineNr">1027 </span>  ]
<span id="L1028" class="LineNr">1028 </span>  run [
<span id="L1029" class="LineNr">1029 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L1030" class="LineNr">1030 </span>  <span class="Conceal">¦</span> 10:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L1031" class="LineNr">1031 </span>  <span class="Conceal">¦</span> 11:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L1032" class="LineNr">1032 </span>  ]
<span id="L1033" class="LineNr">1033 </span>  screen-should-contain [
<span id="L1034" class="LineNr">1034 </span>  <span class="Conceal">¦</span><span class="Constant"> .          .</span>
<span id="L1035" class="LineNr">1035 </span>  <span class="Conceal">¦</span><span class="Constant"> .abcd      .</span>
<span id="L1036" class="LineNr">1036 </span>  <span class="Conceal">¦</span><span class="Constant"> .ef        .</span>
<span id="L1037" class="LineNr">1037 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌     .</span>
<span id="L1038" class="LineNr">1038 </span>  ]
<span id="L1039" class="LineNr">1039 </span>  memory-should-contain [
<span id="L1040" class="LineNr">1040 </span>  <span class="Conceal">¦</span><span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 2</span>  <span class="Comment"># cursor-row</span>
<span id="L1041" class="LineNr">1041 </span>  <span class="Conceal">¦</span><span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># cursor-column</span>
<span id="L1042" class="LineNr">1042 </span>  ]
<span id="L1043" class="LineNr">1043 </span>]
<span id="L1044" class="LineNr">1044 </span>
<span id="L1045" class="LineNr">1045 </span><span class="muScenario">scenario</span> editor-inserts-indent-after-newline [
<span id="L1046" class="LineNr">1046 </span>  <span class="Constant">local-scope</span>
<span id="L1047" class="LineNr">1047 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">10/height</span>
<span id="L1048" class="LineNr">1048 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[ab</span>
<span id="L1049" class="LineNr">1049 </span><span class="Constant">  cd</span>
<span id="L1050" class="LineNr">1050 </span><span class="Constant">ef]</span>
<span id="L1051" class="LineNr">1051 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L1052" class="LineNr">1052 </span>  <span class="Comment"># position cursor after 'cd' and hit 'newline'</span>
<span id="L1053" class="LineNr">1053 </span>  assume-console [
<span id="L1054" class="LineNr">1054 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 8</span>
<span id="L1055" class="LineNr">1055 </span>  <span class="Conceal">¦</span> type [
<span id="L1056" class="LineNr">1056 </span>]
<span id="L1057" class="LineNr">1057 </span>  ]
<span id="L1058" class="LineNr">1058 </span>  run [
<span id="L1059" class="LineNr">1059 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L1060" class="LineNr">1060 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L1061" class="LineNr">1061 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L1062" class="LineNr">1062 </span>  ]
<span id="L1063" class="LineNr">1063 </span>  <span class="Comment"># cursor should be below start of previous line</span>
<span id="L1064" class="LineNr">1064 </span>  memory-should-contain [
<span id="L1065" class="LineNr">1065 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># cursor row</span>
<span id="L1066" class="LineNr">1066 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 2</span>  <span class="Comment"># cursor column (indented)</span>
<span id="L1067" class="LineNr">1067 </span>  ]
<span id="L1068" class="LineNr">1068 </span>]
<span id="L1069" class="LineNr">1069 </span>
<span id="L1070" class="LineNr">1070 </span><span class="muScenario">scenario</span> editor-skips-indent-around-paste [
<span id="L1071" class="LineNr">1071 </span>  <span class="Constant">local-scope</span>
<span id="L1072" class="LineNr">1072 </span>  assume-screen <span class="Constant">10/width</span>, <span class="Constant">10/height</span>
<span id="L1073" class="LineNr">1073 </span>  s:text <span class="Special">&lt;-</span> new <span class="Constant">[ab</span>
<span id="L1074" class="LineNr">1074 </span><span class="Constant">  cd</span>
<span id="L1075" class="LineNr">1075 </span><span class="Constant">ef]</span>
<span id="L1076" class="LineNr">1076 </span>  e:&amp;:editor <span class="Special">&lt;-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
<span id="L1077" class="LineNr">1077 </span>  <span class="Comment"># position cursor after 'cd' and hit 'newline' surrounded by paste markers</span>
<span id="L1078" class="LineNr">1078 </span>  assume-console [
<span id="L1079" class="LineNr">1079 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 8</span>
<span id="L1080" class="LineNr">1080 </span>  <span class="Conceal">¦</span> press<span class="Constant"> 65507</span>  <span class="Comment"># start paste</span>
<span id="L1081" class="LineNr">1081 </span>  <span class="Conceal">¦</span> press enter
<span id="L1082" class="LineNr">1082 </span>  <span class="Conceal">¦</span> press<span class="Constant"> 65506</span>  <span class="Comment"># end paste</span>
<span id="L1083" class="LineNr">1083 </span>  ]
<span id="L1084" class="LineNr">1084 </span>  run [
<span id="L1085" class="LineNr">1085 </span>  <span class="Conceal">¦</span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e
<span id="L1086" class="LineNr">1086 </span>  <span class="Conceal">¦</span> 3:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-row:offset</span>
<span id="L1087" class="LineNr">1087 </span>  <span class="Conceal">¦</span> 4:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *e, <span class="Constant">cursor-column:offset</span>
<span id="L1088" class="LineNr">1088 </span>  ]
<span id="L1089" class="LineNr">1089 </span>  <span class="Comment"># cursor should be below start of previous line</span>
<span id="L1090" class="LineNr">1090 </span>  memory-should-contain [
<span id="L1091" class="LineNr">1091 </span>  <span class="Conceal">¦</span><span class="Constant"> 3</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># cursor row</span>
<span id="L1092" class="LineNr">1092 </span>  <span class="Conceal">¦</span><span class="Constant"> 4</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># cursor column (not indented)</span>
<span id="L1093" class="LineNr">1093 </span>  ]
<span id="L1094" class="LineNr">1094 </span>]
<span id="L1095" class="LineNr">1095 </span>
<span id="L1096" class="LineNr">1096 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L199'>&lt;handle-special-key&gt;</a></span> [
<span id="L1097" class="LineNr">1097 </span>  <span class="Delimiter">{</span>
<span id="L1098" class="LineNr">1098 </span>  <span class="Conceal">¦</span> paste-start?:bool <span class="Special">&lt;-</span> equal k, <span class="Constant">65507/paste-start</span>
<span id="L1099" class="LineNr">1099 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> paste-start?
<span id="L1100" class="LineNr">1100 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">indent?:offset</span>, <span class="Constant">0/false</span>
<span id="L1101" class="LineNr">1101 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">1/go-render</span>
<span id="L1102" class="LineNr">1102 </span>  <span class="Delimiter">}</span>
<span id="L1103" class="LineNr">1103 </span>]
<span id="L1104" class="LineNr">1104 </span>
<span id="L1105" class="LineNr">1105 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L199'>&lt;handle-special-key&gt;</a></span> [
<span id="L1106" class="LineNr">1106 </span>  <span class="Delimiter">{</span>
<span id="L1107" class="LineNr">1107 </span>  <span class="Conceal">¦</span> paste-end?:bool <span class="Special">&lt;-</span> equal k, <span class="Constant">65506/paste-end</span>
<span id="L1108" class="LineNr">1108 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> paste-end?
<span id="L1109" class="LineNr">1109 </span>  <span class="Conceal">¦</span> *editor <span class="Special">&lt;-</span> put *editor, <span class="Constant">indent?:offset</span>, <span class="Constant">1/true</span>
<span id="L1110" class="LineNr">1110 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">1/go-render</span>
<span id="L1111" class="LineNr">1111 </span>  <span class="Delimiter">}</span>
<span id="L1112" class="LineNr">1112 </span>]
<span id="L1113" class="LineNr">1113 </span>
<span id="L1114" class="LineNr">1114 </span><span class="SalientComment">## helpers</span>
<span id="L1115" class="LineNr">1115 </span>
<span id="L1116" class="LineNr">1116 </span><span class="muRecipe">def</span> <a href='002-typing.mu.html#L1116'>draw-horizontal</a> <a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a>, row:num, x:num, right:num<span class="muRecipe"> -&gt; </span><a href='../081print.mu.html#L16'>screen</a>:&amp;:<a href='../081print.mu.html#L16'>screen</a> [
<span id="L1117" class="LineNr">1117 </span>  <span class="Constant">local-scope</span>
<span id="L1118" class="LineNr">1118 </span>  <span class="Constant">load-ingredients</span>
<span id="L1119" class="LineNr">1119 </span>  height:num <span class="Special">&lt;-</span> <a href='../081print.mu.html#L782'>screen-height</a> <a href='../081print.mu.html#L16'>screen</a>
<span id="L1120" class="LineNr">1120 </span>  past-bottom?:bool <span class="Special">&lt;-</span> greater-or-equal row, height
<span id="L1121" class="LineNr">1121 </span>  <span class="muControl">return-if</span> past-bottom?
<span id="L1122" class="LineNr">1122 </span>  style:char, style-found?:bool <span class="Special">&lt;-</span> <span class="Constant">next-ingredient</span>
<span id="L1123" class="LineNr">1123 </span>  <span class="Delimiter">{</span>
<span id="L1124" class="LineNr">1124 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> style-found?
<span id="L1125" class="LineNr">1125 </span>  <span class="Conceal">¦</span> style <span class="Special">&lt;-</span> copy <span class="Constant">9472/horizontal</span>
<span id="L1126" class="LineNr">1126 </span>  <span class="Delimiter">}</span>
<span id="L1127" class="LineNr">1127 </span>  color:num, color-found?:bool <span class="Special">&lt;-</span> <span class="Constant">next-ingredient</span>
<span id="L1128" class="LineNr">1128 </span>  <span class="Delimiter">{</span>
<span id="L1129" class="LineNr">1129 </span>  <span class="Conceal">¦</span> <span class="Comment"># default color to white</span>
<span id="L1130" class="LineNr">1130 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> color-found?
<span id="L1131" class="LineNr">1131 </span>  <span class="Conceal">¦</span> color <span class="Special">&lt;-</span> copy <span class="Constant">245/grey</span>
<span id="L1132" class="LineNr">1132 </span>  <span class="Delimiter">}</span>
<span id="L1133" class="LineNr">1133 </span>  bg-color:num, bg-color-found?:bool <span class="Special">&lt;-</span> <span class="Constant">next-ingredient</span>
<span id="L1134" class="LineNr">1134 </span>  <span class="Delimiter">{</span>
<span id="L1135" class="LineNr">1135 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> bg-color-found?
<span id="L1136" class="LineNr">1136 </span>  <span class="Conceal">¦</span> bg-color <span class="Special">&lt;-</span> copy <span class="Constant">0/black</span>
<span id="L1137" class="LineNr">1137 </span>  <span class="Delimiter">}</span>
<span id="L1138" class="LineNr">1138 </span>  <a href='../081print.mu.html#L16'>screen</a> <span class="Special">&lt;-</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, row, x
<span id="L1139" class="LineNr">1139 </span>  <span class="Delimiter">{</span>
<span id="L1140" class="LineNr">1140 </span>  <span class="Conceal">¦</span> continue?:bool <span class="Special">&lt;-</span> lesser-or-equal x, right  <span class="Comment"># right is inclusive, to match editor semantics</span>
<span id="L1141" class="LineNr">1141 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> continue?
<span id="L1142" class="LineNr">1142 </span>  <span class="Conceal">¦</span> print <a href='../081print.mu.html#L16'>screen</a>, style, color, bg-color
<span id="L1143" class="LineNr">1143 </span>  <span class="Conceal">¦</span> x <span class="Special">&lt;-</span> add x,<span class="Constant"> 1</span>
<span id="L1144" class="LineNr">1144 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span>
<span id="L1145" class="LineNr">1145 </span>  <span class="Delimiter">}</span>
<span id="L1146" class="LineNr">1146 </span>]
</pre>
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