| Commit message (Collapse) | Author | Age | Files | Lines |
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Redo cursor-down to fix a bug.
This should be the final bug I find as part of my audit of everywhere we
compare characters to newlines in layer 3 of the edit/ app.
Pretty messy implementation, but we'll clean it up now.
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Fix a regression caused by commit 3919.
Thanks Juan Crispin Hernandez for running into this.
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Fix CI.
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Fix the failing scenario of commit 3944.
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Fix a discrepancy between fake screen and real terminal behavior. (See
recent commits.)
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Reintroduce the failing test of commit 3938. It has two problems:
a) it's failing, and
b) it's not failing the same way as with a real screen.
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Undo commit 3938 and almost everything after. Let's do this right.
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No, my conclusion in the previous commit was wrong. When you print a
character on the right margin, the cursor coordinates always wrap around
to the left margin on the next row. It's just that if you're at the
bottom of the screen, scrolling gives the impression that the row didn't
change.
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Even though the bug of commit 3938 is now fixed, I'm still trying to
track down why the failure looked different on the fake screen than on
the real one. Snapshot as I try to track down the difference.
One key lesson is that the approach of commit 3860 -- updating the
cursor before rather than after printing each character -- turns out to
be untenable. A sequence of `print` followed by `cursor-position` needs
to behave the same as the real screen.
But it's still not clear how the real screen. When you get to the end of
a line the cursor position wraps after print to the left margin (column
0) on the next row. When you get to the bottom right the cursor position
wraps to the *bottom left* margin. How the heck does it know to scroll
on the next print, then? Is there some hidden state in the terminal?
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Fix an out-of-bounds write to the screen when sandboxes aligned just
right.
Thanks Ella Couch for reporting this issue.
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Fix screen-checking functions to handle fake screen after scrolling.
I can't believe I forgot about this during commit 3882.
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Some corrections and one bugfix to channels after reviewing their
implementation with Caleb Couch.
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Bugfix: when you hit `enter`, the cursor-row does not increment in *one*
special situation: when the line wraps and the cursor is right at the
start of one of the wrapped lines.
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Bugfix: adjust row when hitting ctrl-u on wrapped lines.
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Bugfix: ctrl-a leaves things consistent in the presence of wrapped
lines.
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Bugfix: up-arrow in combination with wrapped lines.
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Bugfix: handle wrapped lines when moving to end of line.
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Redo commit 3905 to always shutdown cleanly on any error raised.
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Remember that `before-previous-line` deals with wrapped screen lines.
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Bugfix in ctrl-u.
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In tests where a text has the wrong length, properly show the text
observed to help debug failures.
We now also consistently say 'text' in Mu errors, never 'string'.
Thanks Ella Couch for reporting this long-standing issue.
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Replace an assertion failure with an error message. Thanks Ella Couch
for reporting this issue.
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Yet another attempt at decomposing incremental edits in some clean way.
The new idea now is that I need to only modify the screen using a
restricted vocabulary of actions:
render-all
render-recipe-side
render-sandbox-side
render-recipe-errors
render-line-from-cursor
render-line-from-start
erase-line-from-cursor
render-character-at-cursor
erase-character-at-cursor
However, decomposing insert-at-cursor is challenging; how to manipulate
cursor-row and cursor-column without also pretending to print to screen?
Do I need to decompose `editor` into multiple containers so that I can
keep cursor-row and cursor-column with screen modifications? Here's what
`editor` looks like after all layers:
container editor [
data:&:duplex-list:char
top-of-screen:&:duplex-list:char
bottom-of-screen:&:duplex-list:char
before-cursor:&:duplex-list:char
left:num
right:num
bottom:num
cursor-row:num
cursor-column:num
indent?:bool
undo:&:list:&:operation
redo:&:list:&:operation
]
It's not obvious that there's a clean way to split all these fields.
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Standardize exit paths. Most layers now don't need to know about termbox.
We can't really use `assert` in console-mode apps; it can't just exit because
we want to be able to check assertion failures in tests.
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Standardize functions to put the main object being modified first.
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