<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - 071print.mu</title>
<meta name="Generator" content="Vim/7.4">
<meta name="plugin-version" content="vim7.4_v1">
<meta name="syntax" content="none">
<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
body { font-family: monospace; color: #eeeeee; background-color: #080808; }
* { font-size: 1.05em; }
.muRecipe { color: #ff8700; }
.Delimiter { color: #a04060; }
.muScenario { color: #00af00; }
.Comment { color: #9090ff; }
.Constant { color: #00a0a0; }
.Special { color: #ff6060; }
.CommentedCode { color: #6c6c6c; }
.muControl { color: #c0a020; }
-->
</style>
<script type='text/javascript'>
<!--
-->
</script>
</head>
<body>
<pre id='vimCodeElement'>
<span class="Comment"># Wrappers around print primitives that take a 'screen' object and are thus</span>
<span class="Comment"># easier to test.</span>
container screen [
num-rows:number
num-columns:number
cursor-row:number
cursor-column:number
data:address:array:screen-cell
]
container screen-cell [
contents:character
color:number
]
<span class="muRecipe">recipe</span> new-fake-screen [
<span class="Constant">local-scope</span>
result:address:screen<span class="Special"> <- </span>new screen:type
width:address:number<span class="Special"> <- </span>get-address result:address:screen/deref, num-columns:offset
width:address:number/deref<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
height:address:number<span class="Special"> <- </span>get-address result:address:screen/deref, num-rows:offset
height:address:number/deref<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="CommentedCode">#? $print height:address:number/deref, 10:literal/newline</span>
row:address:number<span class="Special"> <- </span>get-address result:address:screen/deref, cursor-row:offset
row:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
column:address:number<span class="Special"> <- </span>get-address result:address:screen/deref, cursor-column:offset
column:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
bufsize:number<span class="Special"> <- </span>multiply width:address:number/deref, height:address:number/deref
buf:address:address:array:screen-cell<span class="Special"> <- </span>get-address result:address:screen/deref, data:offset
buf:address:address:array:screen-cell/deref<span class="Special"> <- </span>new screen-cell:type, bufsize:number
clear-screen result:address:screen
<span class="muControl">reply</span> result:address:screen
]
<span class="muRecipe">recipe</span> clear-screen [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="CommentedCode">#? $print [clearing screen</span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="Comment"># if x exists</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="Comment"># clear fake screen</span>
buf:address:array:screen-cell<span class="Special"> <- </span>get x:address:screen/deref, data:offset
max:number<span class="Special"> <- </span>length buf:address:array:screen-cell/deref
i:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal i:number, max:number
<span class="muControl">break-if</span> done?:boolean
curr:address:screen-cell<span class="Special"> <- </span>index-address buf:address:array:screen-cell/deref, i:number
curr-content:address:character<span class="Special"> <- </span>get-address curr:address:screen-cell/deref, contents:offset
curr-content:address:character/deref<span class="Special"> <- </span>copy <span class="Constant">[ ]</span>
curr-color:address:character<span class="Special"> <- </span>get-address curr:address:screen-cell/deref, color:offset
curr-color:address:character/deref<span class="Special"> <- </span>copy <span class="Constant">7:literal/white</span>
i:number<span class="Special"> <- </span>add i:number, <span class="Constant">1:literal</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="Comment"># reset cursor</span>
cur:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-row:offset
cur:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
cur:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-column:offset
cur:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
clear-display
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> fake-screen-is-clear? [
<span class="Constant">local-scope</span>
screen:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="muControl">reply-unless</span> screen:address:screen, <span class="Constant">1:literal/true</span>
buf:address:array:screen-cell<span class="Special"> <- </span>get screen:address:screen/deref, data:offset
i:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
len:number<span class="Special"> <- </span>length buf:address:array:screen-cell/deref
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal i:number, len:number
<span class="muControl">break-if</span> done?:boolean
curr:screen-cell<span class="Special"> <- </span>index buf:address:array:screen-cell/deref, i:number
curr-contents:character<span class="Special"> <- </span>get curr:screen-cell, contents:offset
i:number<span class="Special"> <- </span>add i:number, <span class="Constant">1:literal</span>
<span class="muControl">loop-unless</span> curr-contents:character
<span class="Comment"># not 0</span>
<span class="muControl">reply</span> <span class="Constant">0:literal/false</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> <span class="Constant">1:literal/true</span>
]
<span class="muRecipe">recipe</span> print-character [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
c:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
color:number, color-found?:boolean<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Comment"># default color to white</span>
<span class="muControl">break-if</span> color-found?:boolean
color:number<span class="Special"> <- </span>copy <span class="Constant">7:literal/white</span>
<span class="Delimiter">}</span>
bg-color:number, bg-color-found?:boolean<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Comment"># default bg-color to black</span>
<span class="muControl">break-if</span> bg-color-found?:boolean
bg-color:number<span class="Special"> <- </span>copy <span class="Constant">0:literal/black</span>
<span class="Delimiter">}</span>
<span class="CommentedCode">#? trace [app], [print character] #? 1</span>
<span class="Delimiter">{</span>
<span class="Comment"># if x exists</span>
<span class="Comment"># (handle special cases exactly like in the real screen)</span>
<span class="muControl">break-unless</span> x:address:screen
width:number<span class="Special"> <- </span>get x:address:screen/deref, num-columns:offset
height:number<span class="Special"> <- </span>get x:address:screen/deref, num-rows:offset
<span class="Comment"># if cursor is out of bounds, silently exit</span>
row:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-row:offset
legal?:boolean<span class="Special"> <- </span>greater-or-equal row:address:number/deref, <span class="Constant">0:literal</span>
<span class="muControl">reply-unless</span> legal?:boolean, x:address:screen
legal?:boolean<span class="Special"> <- </span>lesser-than row:address:number/deref, height:number
<span class="muControl">reply-unless</span> legal?:boolean, x:address:screen
column:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-column:offset
legal?:boolean<span class="Special"> <- </span>greater-or-equal column:address:number/deref, <span class="Constant">0:literal</span>
<span class="muControl">reply-unless</span> legal?:boolean, x:address:screen
legal?:boolean<span class="Special"> <- </span>lesser-than column:address:number/deref, width:number
<span class="muControl">reply-unless</span> legal?:boolean, x:address:screen
<span class="Comment"># special-case: newline</span>
<span class="Delimiter">{</span>
newline?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">10:literal/newline</span>
<span class="CommentedCode">#? $print c:character, [ ], newline?:boolean, 10:literal/newline</span>
<span class="muControl">break-unless</span> newline?:boolean
<span class="Delimiter">{</span>
<span class="Comment"># unless cursor is already at bottom</span>
bottom:number<span class="Special"> <- </span>subtract height:number, <span class="Constant">1:literal</span>
at-bottom?:boolean<span class="Special"> <- </span>greater-or-equal row:address:number/deref, bottom:number
<span class="muControl">break-if</span> at-bottom?:boolean
<span class="Comment"># move it to the next row</span>
column:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
row:address:number/deref<span class="Special"> <- </span>add row:address:number/deref, <span class="Constant">1:literal</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># save character in fake screen</span>
index:number<span class="Special"> <- </span>multiply row:address:number/deref, width:number
index:number<span class="Special"> <- </span>add index:number, column:address:number/deref
buf:address:array:screen-cell<span class="Special"> <- </span>get x:address:screen/deref, data:offset
len:number<span class="Special"> <- </span>length buf:address:array:screen-cell/deref
<span class="Comment"># special-case: backspace</span>
<span class="Delimiter">{</span>
backspace?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">8:literal</span>
<span class="muControl">break-unless</span> backspace?:boolean
<span class="Delimiter">{</span>
<span class="Comment"># unless cursor is already at left margin</span>
at-left?:boolean<span class="Special"> <- </span>lesser-or-equal column:address:number/deref, <span class="Constant">0:literal</span>
<span class="muControl">break-if</span> at-left?:boolean
<span class="Comment"># clear previous location</span>
column:address:number/deref<span class="Special"> <- </span>subtract column:address:number/deref, <span class="Constant">1:literal</span>
index:number<span class="Special"> <- </span>subtract index:number, <span class="Constant">1:literal</span>
cursor:address:screen-cell<span class="Special"> <- </span>index-address buf:address:array:screen-cell/deref, index:number
cursor-contents:address:character<span class="Special"> <- </span>get-address cursor:address:screen-cell/deref, contents:offset
cursor-color:address:number<span class="Special"> <- </span>get-address cursor:address:screen-cell/deref, color:offset
cursor-contents:address:character/deref<span class="Special"> <- </span>copy <span class="Constant">32:literal/space</span>
cursor-color:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">7:literal/white</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="CommentedCode">#? $print [saving character ], c:character, [ to fake screen ], cursor:address/screen, 10:literal/newline</span>
cursor:address:screen-cell<span class="Special"> <- </span>index-address buf:address:array:screen-cell/deref, index:number
cursor-contents:address:character<span class="Special"> <- </span>get-address cursor:address:screen-cell/deref, contents:offset
cursor-color:address:number<span class="Special"> <- </span>get-address cursor:address:screen-cell/deref, color:offset
cursor-contents:address:character/deref<span class="Special"> <- </span>copy c:character
cursor-color:address:number/deref<span class="Special"> <- </span>copy color:number
<span class="Comment"># increment column unless it's already all the way to the right</span>
<span class="Delimiter">{</span>
right:number<span class="Special"> <- </span>subtract width:number, <span class="Constant">1:literal</span>
at-right?:boolean<span class="Special"> <- </span>greater-or-equal column:address:number/deref, right:number
<span class="muControl">break-if</span> at-right?:boolean
column:address:number/deref<span class="Special"> <- </span>add column:address:number/deref, <span class="Constant">1:literal</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
print-character-to-display c:character, color:number, bg-color:number
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muScenario">scenario</span> print-character-at-top-left [
run [
<span class="CommentedCode">#? $start-tracing #? 3</span>
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
2:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
3:array:screen-cell<span class="Special"> <- </span>copy 2:address:array:screen-cell/deref
]
memory-should-contain [
3<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
4<span class="Special"> <- </span>97 <span class="Comment"># 'a'</span>
5<span class="Special"> <- </span>7 <span class="Comment"># white</span>
6<span class="Special"> <- </span>0
]
]
<span class="muScenario">scenario</span> print-character-color [
run [
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal/a</span>, <span class="Constant">1:literal/red</span>
2:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
3:array:screen-cell<span class="Special"> <- </span>copy 2:address:array:screen-cell/deref
]
memory-should-contain [
3<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
4<span class="Special"> <- </span>97 <span class="Comment"># 'a'</span>
5<span class="Special"> <- </span>1 <span class="Comment"># red</span>
6<span class="Special"> <- </span>0
]
]
<span class="muScenario">scenario</span> print-backspace-character [
run [
<span class="CommentedCode">#? $start-tracing #? 3</span>
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">8:literal</span> <span class="Comment"># backspace</span>
2:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-column:offset
3:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
4:array:screen-cell<span class="Special"> <- </span>copy 3:address:array:screen-cell/deref
]
memory-should-contain [
2<span class="Special"> <- </span>0 <span class="Comment"># cursor column</span>
4<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
5<span class="Special"> <- </span>32 <span class="Comment"># space, not 'a'</span>
6<span class="Special"> <- </span>7 <span class="Comment"># white</span>
7<span class="Special"> <- </span>0
]
]
<span class="muScenario">scenario</span> print-extra-backspace-character [
run [
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">8:literal</span> <span class="Comment"># backspace</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">8:literal</span> <span class="Comment"># backspace</span>
2:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-column:offset
3:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
4:array:screen-cell<span class="Special"> <- </span>copy 3:address:array:screen-cell/deref
]
memory-should-contain [
2<span class="Special"> <- </span>0 <span class="Comment"># cursor column</span>
4<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
5<span class="Special"> <- </span>32 <span class="Comment"># space, not 'a'</span>
6<span class="Special"> <- </span>7 <span class="Comment"># white</span>
7<span class="Special"> <- </span>0
]
]
<span class="muScenario">scenario</span> print-at-right-margin [
run [
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">2:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">98:literal</span> <span class="Comment"># 'b'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">99:literal</span> <span class="Comment"># 'c'</span>
2:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-column:offset
3:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
4:array:screen-cell<span class="Special"> <- </span>copy 3:address:array:screen-cell/deref
]
memory-should-contain [
2<span class="Special"> <- </span>1 <span class="Comment"># cursor column</span>
4<span class="Special"> <- </span>4 <span class="Comment"># width*height</span>
5<span class="Special"> <- </span>97 <span class="Comment"># 'a'</span>
6<span class="Special"> <- </span>7 <span class="Comment"># white</span>
7<span class="Special"> <- </span>99 <span class="Comment"># 'c' over 'b'</span>
8<span class="Special"> <- </span>7 <span class="Comment"># white</span>
9<span class="Special"> <- </span>0
]
]
<span class="muScenario">scenario</span> print-newline-character [
run [
<span class="CommentedCode">#? $start-tracing #? 3</span>
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">10:literal/newline</span>
2:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-row:offset
3:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-column:offset
4:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
5:array:screen-cell<span class="Special"> <- </span>copy 4:address:array:screen-cell/deref
]
memory-should-contain [
2<span class="Special"> <- </span>1 <span class="Comment"># cursor row</span>
3<span class="Special"> <- </span>0 <span class="Comment"># cursor column</span>
5<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
6<span class="Special"> <- </span>97 <span class="Comment"># 'a'</span>
7<span class="Special"> <- </span>7 <span class="Comment"># white</span>
8<span class="Special"> <- </span>0
]
]
<span class="muScenario">scenario</span> print-newline-at-bottom-line [
run [
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">10:literal/newline</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">10:literal/newline</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">10:literal/newline</span>
2:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-row:offset
3:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-column:offset
]
memory-should-contain [
2<span class="Special"> <- </span>1 <span class="Comment"># cursor row</span>
3<span class="Special"> <- </span>0 <span class="Comment"># cursor column</span>
]
]
<span class="muScenario">scenario</span> print-at-bottom-right [
run [
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">2:literal/width</span>, <span class="Constant">2:literal/height</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">10:literal/newline</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">98:literal</span> <span class="Comment"># 'b'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">99:literal</span> <span class="Comment"># 'c'</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">10:literal/newline</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">100:literal</span> <span class="Comment"># 'd'</span>
2:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-row:offset
3:number<span class="Special"> <- </span>get 1:address:screen/deref, cursor-column:offset
4:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
5:array:screen-cell<span class="Special"> <- </span>copy 4:address:array:screen-cell/deref
]
memory-should-contain [
2<span class="Special"> <- </span>1 <span class="Comment"># cursor row</span>
3<span class="Special"> <- </span>1 <span class="Comment"># cursor column</span>
5<span class="Special"> <- </span>4 <span class="Comment"># width*height</span>
6<span class="Special"> <- </span>0 <span class="Comment"># unused</span>
7<span class="Special"> <- </span>7 <span class="Comment"># white</span>
8<span class="Special"> <- </span>0 <span class="Comment"># unused</span>
9<span class="Special"> <- </span>7 <span class="Comment"># white</span>
10<span class="Special"> <- </span>97 <span class="Comment"># 'a'</span>
11<span class="Special"> <- </span>7 <span class="Comment"># white</span>
12<span class="Special"> <- </span>100 <span class="Comment"># 'd' over 'b' and 'c' and newline</span>
13<span class="Special"> <- </span>7 <span class="Comment"># white</span>
14<span class="Special"> <- </span>0
]
]
<span class="muRecipe">recipe</span> clear-line [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, clear line in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
width:number<span class="Special"> <- </span>get x:address:screen/deref, num-columns:offset
column:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-column:offset
original-column:number<span class="Special"> <- </span>copy column:address:number/deref
<span class="Comment"># space over the entire line</span>
<span class="CommentedCode">#? $start-tracing #? 1</span>
<span class="Delimiter">{</span>
<span class="CommentedCode">#? $print column:address:number/deref, 10:literal/newline</span>
right:number<span class="Special"> <- </span>subtract width:number, <span class="Constant">1:literal</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal column:address:number/deref, right:number
<span class="muControl">break-if</span> done?:boolean
print-character x:address:screen, <span class="Constant">[ ]</span> <span class="Comment"># implicitly updates 'column'</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="Comment"># now back to where the cursor was</span>
column:address:number/deref<span class="Special"> <- </span>copy original-column:number
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
clear-line-on-display
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> cursor-position [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, lookup cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
row:number<span class="Special"> <- </span>get x:address:screen/deref, cursor-row:offset
column:number<span class="Special"> <- </span>get x:address:screen/deref, cursor-column:offset
<span class="muControl">reply</span> row:number, column:number, x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
row:number, column:number<span class="Special"> <- </span>cursor-position-on-display
<span class="muControl">reply</span> row:number, column:number, x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> move-cursor [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
new-row:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
new-column:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
row:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-row:offset
row:address:number/deref<span class="Special"> <- </span>copy new-row:number
column:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-column:offset
column:address:number/deref<span class="Special"> <- </span>copy new-column:number
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
move-cursor-on-display new-row:number, new-column:number
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muScenario">scenario</span> clear-line-erases-printed-characters [
run [
<span class="CommentedCode">#? $start-tracing #? 4</span>
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
<span class="Comment"># print a character</span>
1:address:screen<span class="Special"> <- </span>print-character 1:address:screen, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
<span class="Comment"># move cursor to start of line</span>
1:address:screen<span class="Special"> <- </span>move-cursor 1:address:screen, <span class="Constant">0:literal/row</span>, <span class="Constant">0:literal/column</span>
<span class="Comment"># clear line</span>
1:address:screen<span class="Special"> <- </span>clear-line 1:address:screen
2:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
3:array:screen-cell<span class="Special"> <- </span>copy 2:address:array:screen-cell/deref
]
<span class="Comment"># screen should be blank</span>
memory-should-contain [
3<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
4<span class="Special"> <- </span>0
5<span class="Special"> <- </span>7
6<span class="Special"> <- </span>0
7<span class="Special"> <- </span>7
8<span class="Special"> <- </span>0
9<span class="Special"> <- </span>7
10<span class="Special"> <- </span>0
11<span class="Special"> <- </span>7
12<span class="Special"> <- </span>0
13<span class="Special"> <- </span>7
14<span class="Special"> <- </span>0
15<span class="Special"> <- </span>7
]
]
<span class="muRecipe">recipe</span> cursor-down [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="Delimiter">{</span>
<span class="Comment"># if row < height-1</span>
height:number<span class="Special"> <- </span>get x:address:screen/deref, num-rows:offset
row:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-row:offset
max:number<span class="Special"> <- </span>subtract height:number, <span class="Constant">1:literal</span>
at-bottom?:boolean<span class="Special"> <- </span>greater-or-equal row:address:number/deref, max:number
<span class="muControl">break-if</span> at-bottom?:boolean
<span class="Comment"># row = row+1</span>
<span class="CommentedCode">#? $print [AAA: ], row:address:number, [ -> ], row:address:number/deref, 10:literal/newline</span>
row:address:number/deref<span class="Special"> <- </span>add row:address:number/deref, <span class="Constant">1:literal</span>
<span class="CommentedCode">#? $print [BBB: ], row:address:number, [ -> ], row:address:number/deref, 10:literal/newline</span>
<span class="CommentedCode">#? $start-tracing #? 1</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
move-cursor-down-on-display
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> cursor-up [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="Delimiter">{</span>
<span class="Comment"># if row > 0</span>
row:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-row:offset
at-top?:boolean<span class="Special"> <- </span>lesser-or-equal row:address:number/deref, <span class="Constant">0:literal</span>
<span class="muControl">break-if</span> at-top?:boolean
<span class="Comment"># row = row-1</span>
row:address:number/deref<span class="Special"> <- </span>subtract row:address:number/deref, <span class="Constant">1:literal</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
move-cursor-up-on-display
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> cursor-right [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="Delimiter">{</span>
<span class="Comment"># if column < width-1</span>
width:number<span class="Special"> <- </span>get x:address:screen/deref, num-columns:offset
column:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-column:offset
max:number<span class="Special"> <- </span>subtract width:number, <span class="Constant">1:literal</span>
at-bottom?:boolean<span class="Special"> <- </span>greater-or-equal column:address:number/deref, max:number
<span class="muControl">break-if</span> at-bottom?:boolean
<span class="Comment"># column = column+1</span>
column:address:number/deref<span class="Special"> <- </span>add column:address:number/deref, <span class="Constant">1:literal</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
move-cursor-right-on-display
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> cursor-left [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="Delimiter">{</span>
<span class="Comment"># if column > 0</span>
column:address:number<span class="Special"> <- </span>get-address x:address:screen/deref, cursor-column:offset
at-top?:boolean<span class="Special"> <- </span>lesser-or-equal column:address:number/deref, <span class="Constant">0:literal</span>
<span class="muControl">break-if</span> at-top?:boolean
<span class="Comment"># column = column-1</span>
column:address:number/deref<span class="Special"> <- </span>subtract column:address:number/deref, <span class="Constant">1:literal</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
move-cursor-left-on-display
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> cursor-to-start-of-line [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
row:number, _, x:address:screen<span class="Special"> <- </span>cursor-position x:address:screen
column:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
x:address:screen<span class="Special"> <- </span>move-cursor x:address:screen, row:number, column:number
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> cursor-to-next-line [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
x:address:screen<span class="Special"> <- </span>cursor-down x:address:screen
x:address:screen<span class="Special"> <- </span>cursor-to-start-of-line x:address:screen
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> screen-width [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
width:number<span class="Special"> <- </span>get x:address:screen/deref, num-columns:offset
<span class="muControl">reply</span> width:number
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
width:number<span class="Special"> <- </span>display-width
<span class="muControl">reply</span> width:number
]
<span class="muRecipe">recipe</span> screen-height [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists, move cursor in fake screen</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
height:number<span class="Special"> <- </span>get x:address:screen/deref, num-rows:offset
<span class="muControl">reply</span> height:number
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
height:number<span class="Special"> <- </span>display-height
<span class="muControl">reply</span> height:number
]
<span class="muRecipe">recipe</span> hide-cursor [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists (not real display), do nothing</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="muControl">reply</span> x:address:screen
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
hide-cursor-on-display
<span class="muControl">reply</span> x:address:screen
]
<span class="muRecipe">recipe</span> show-cursor [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists (not real display), do nothing</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="muControl">reply</span> x:address:screen
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
show-cursor-on-display
<span class="muControl">reply</span> x:address:screen
]
<span class="muRecipe">recipe</span> hide-screen [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists (not real display), do nothing</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="muControl">reply</span> x:address:screen
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
hide-display
<span class="muControl">reply</span> x:address:screen
]
<span class="muRecipe">recipe</span> show-screen [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># if x exists (not real display), do nothing</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> x:address:screen
<span class="muControl">reply</span> x:address:screen
<span class="Delimiter">}</span>
<span class="Comment"># otherwise, real screen</span>
show-display
<span class="muControl">reply</span> x:address:screen
]
<span class="muRecipe">recipe</span> print-string [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
s:address:array:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
color:number, color-found?:boolean<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Comment"># default color to white</span>
<span class="muControl">break-if</span> color-found?:boolean
color:number<span class="Special"> <- </span>copy <span class="Constant">7:literal/white</span>
<span class="Delimiter">}</span>
bg-color:number, bg-color-found?:boolean<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Comment"># default bg-color to black</span>
<span class="muControl">break-if</span> bg-color-found?:boolean
bg-color:number<span class="Special"> <- </span>copy <span class="Constant">0:literal/black</span>
<span class="Delimiter">}</span>
len:number<span class="Special"> <- </span>length s:address:array:character/deref
i:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal i:number, len:number
<span class="muControl">break-if</span> done?:boolean
c:character<span class="Special"> <- </span>index s:address:array:character/deref, i:number
print-character x:address:screen, c:character, color:number, bg-color:number
i:number<span class="Special"> <- </span>add i:number, <span class="Constant">1:literal</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
<span class="muScenario">scenario</span> print-string-stops-at-right-margin [
run [
1:address:screen<span class="Special"> <- </span>new-fake-screen <span class="Constant">3:literal/width</span>, <span class="Constant">2:literal/height</span>
2:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abcd]</span>
1:address:screen<span class="Special"> <- </span>print-string 1:address:screen, 2:address:array:character
3:address:array:screen-cell<span class="Special"> <- </span>get 1:address:screen/deref, data:offset
4:array:screen-cell<span class="Special"> <- </span>copy 3:address:array:screen-cell/deref
]
memory-should-contain [
4<span class="Special"> <- </span>6 <span class="Comment"># width*height</span>
5<span class="Special"> <- </span>97 <span class="Comment"># 'a'</span>
6<span class="Special"> <- </span>7 <span class="Comment"># white</span>
7<span class="Special"> <- </span>98 <span class="Comment"># 'b'</span>
8<span class="Special"> <- </span>7 <span class="Comment"># white</span>
9<span class="Special"> <- </span>100 <span class="Comment"># 'd' overwrites 'c'</span>
10<span class="Special"> <- </span>7 <span class="Comment"># white</span>
11<span class="Special"> <- </span>0 <span class="Comment"># unused</span>
]
]
<span class="muRecipe">recipe</span> print-integer [
<span class="Constant">local-scope</span>
x:address:screen<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
n:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
color:number, color-found?:boolean<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Comment"># default color to white</span>
<span class="muControl">break-if</span> color-found?:boolean
color:number<span class="Special"> <- </span>copy <span class="Constant">7:literal/white</span>
<span class="Delimiter">}</span>
bg-color:number, bg-color-found?:boolean<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Comment"># default bg-color to black</span>
<span class="muControl">break-if</span> bg-color-found?:boolean
bg-color:number<span class="Special"> <- </span>copy <span class="Constant">0:literal/black</span>
<span class="Delimiter">}</span>
<span class="Comment"># todo: other bases besides decimal</span>
s:address:array:character<span class="Special"> <- </span>integer-to-decimal-string n:number
print-string x:address:screen, s:address:array:character, color:number, bg-color:number
<span class="muControl">reply</span> x:address:screen/same-as-ingredient:0
]
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->