| Commit message (Collapse) | Author | Age | Files | Lines |
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To achieve this we have to switch to a model of the screen in termbox that
is closer to the underlying terminal.
Before:
a screen is a grid of characters
writing out of bounds does nothing
After:
a screen is a scrolling raster of characters
writing out of bounds wraps to next line and scrolls if necessary
To move to the new model, it was essential that I migrate my fake screen
at the same time to mimic it. This is why the first attempt (commit 3824)
failed (commit 3858). This is also why this commit can't be split into
smaller pieces.
The fake screen now 'scrolls' by rotating screen lines from top to bottom.
There's still no notion of a scrollback buffer.
The newer model is richer; it permits repl-like apps that upstream termbox
can't do easily. It also permits us to simply use `printf` or `cout` to
write to the screen, and everything mostly works as you would expect. Exceptions:
a) '\n' won't do what you expect. You need to explicitly print both '\n'
and '\r'.
b) backspace won't do what you expect. It only moves the cursor back,
without erasing the previous character. It does not wrap.
Both behaviors exactly mimic my existing terminal's emulation of vt100.
The catch: it's easy to accidentally scroll in apps. Out-of-bounds prints
didn't matter before, but they're bugs now. To help track them down, use
the `save-top-idx`, `assert-no-scroll` pair of helpers.
An important trick is to wrap the cursor before rather after printing
a character. Otherwise we end up scrolling every time we print to the
bottom-right character. This means that the cursor position can be invalid
at the start of a print, and we need to handle that.
In the process we also lose the ability to hide and show the screen. We
have to show the prints happening. Seems apt for a "white-box" platform
like Mu.
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Revert commits 3824, 3850 and 3852. We'll redo them more carefully.
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Bugfix of commit 3850 for the sandbox/ app. I'd hoped to just quickly move
past this ugly approach, but a cleaner way is more involved than I thought.
This way is ugly partly because I'm introducing a bunch of conditionals
without testing them. One or more of my additions may well be hiding bugs.
Or I may need to add them in a few other places.
The clean way is to update the fake screen model to accurately mimic the
new real screen, where out of bounds prints aren't silently ignored, and
where scrolling is a fact of life.
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Fix CI.
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Now it's much more apparent why things are slow. You can see each repaint
happening. Already I fixed one performance bug -- in clear-rest-of-screen.
Since this subverts Mu's fake screen there may be bugs.
Another salubrious side effect: I've finally internalized that switching
to raw mode doesn't have to clear the screen. That was just an artifact
of how termbox abstracted operations. Now I can conceive of using termbox
to build a repl as well.
(I was inspired to poke into termbox internals by
http://viewsourcecode.org/snaptoken/kilo and
https://github.com/antirez/linenoise)
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Standardize the order of some common blocks in `render`, `render-text`
and `render-code`. This is preparation for trying to reorganize them to
reduce duplicate code.
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Fix a _very_ misleading comment.
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Move 'render-code' to the layer where it's used.
Thanks Caleb Couch for finding this bit of ugliness.
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Don't try to snapshot in scenarios.
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I accidentally got rid of git snapshotting of lessons back when I switched
to testable file primitives last December (commit 3705).
>:-(
Bringing it back now, hopefully better. The improvement is that there's
now at most one commit every time we hit F4.
This change adds yet another reason that running `mu` from a different
directory is just not supported.
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Update sandbox/ with recent changes to edit/ (commit 3695 onwards).
[Incidentally, this is the first commit to be made while running on
OpenBSD. Simulated and host systems are going to blur together from now
on.]
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Stop requiring jump instructions to explicitly provide a ':label' type
for jump targets.
This has been a source of repeated confusion for my students:
a) They'd add the ':label' to the label definition rather than the
jump target (label use)
b) They'd spend time thinking about whether the initial '+' prefix was
part of the label name.
In the process I cleaned up a couple of things:
- the space of names is more cleanly partitioned into labels and
non-labels (clarifying that '_' and '-' are non-label prefixes)
- you can't use label names as regular variables anymore
- you can infer the type of a label just from its name
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Redo commit 3457.
Basically there were 3 unicode characters we changed back then:
solid horizontal line: 9473 -> 9472
fuzzy horizontal line: 9480 -> 9548
fuzzy vertical line: 9482 -> 9550
The solid horizontal line has no issues, so we just redo it here.
For the other two, we'll perform the substitution only when rendering
html. That gives us the best of both worlds: the scenario screens render
right in html, and alt-tabbing continues to be snappy when running the
edit/ app.
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Revert commit 3457, where I switched the unicode characters used in the
edit/ app to something that doesn't render double-wide in html. It turns
out that the new unicode characters made iTerm2 sluggish in alt-tabbing
between windows. (Commit 3488 only fixed the screen-clearing issue.)
I haven't reverted the html files. I'm going to redo commit 3457 next so
the html files continue to render like they do now.
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Switch around some unicode characters in the edit/ app so that it
renders more cleanly in html (with monospace fonts).
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Ugly that we didn't need 'screen' to provide a type in scenarios
(because assume-screen expands to a definition of 'screen') but we did
need a type for 'console'. Just never require types for special names in
scenarios.
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A long-standing problem has been that I couldn't spread code across
'run' blocks because they were separate scopes, so I've ended up making
them effectively comments. Running code inside a 'run' block is
identical in every way to simply running the code directly. The 'run'
block is merely a visual aid to separate setup from the component under
test.
In the process I've also standardized all Mu scenarios to always run in
a local scope, and only use (raw) numeric addresses for values they want
to check later.
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Well, almost. I can't use them in some places in C++ where I'm just
creating a temporary reagent without passing it through transforms. Like
in some unit tests. I can't use them in memory-should-contain.
And there's one remaining bug: I can't use abbreviations in a couple of
places in 075channel.mu.
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Done using 'text' type abbreviation everywhere.
There's still a problem. If we define a function with a type
abbreviation and then redefine it without, I think we end up creating
separate variants. That seems wrong. Let's isolate a scenario for that
next.
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Process type abbreviations in function headers.
Still a couple of places where doing this causes strange errors. We'll
track those down next.
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Process type abbreviations in container definitions.
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In the process I've uncover a couple of situations we don't support type
abbreviations yet. They're next.
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This is part of efforts to allow students to transition gradually from
the sandbox to running programs directly on the commandline, writing
real scenarios, etc. Running on the commandline requires 'main', but
overriding 'main' would mess up edit/ which is itself a Mu program.
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This ports commits 3052 and 3053 from the edit/ app.
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Clean up this helper before we start redoing sandbox menubars.
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The actual fix is in the layer rewriting literal strings.
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In the process I've also simplified the sandbox/ app. Since it's
impossible for sandbox editors to span multiple pages, we can drop all
scroll support altogether.
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This had been broken ever since 2854, because we can't write tests for
restore-snapshots at the moment.
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Now that we no longer have non-shared addresses, we can just always
track refcounts for all addresses.
Phew!
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I'm dropping all mention of 'recipe' terminology from the Readme. That
way I hope to avoid further bike-shedding discussions while I very
slowly decide on the right terminology with my students.
I could be smarter in my error messages and use 'recipe' when code uses
it and 'function' otherwise. But what about other words like ingredient?
It would all add complexity that I'm not yet sure is worthwhile. But I
do want separate experiences for veteran programmers reading about Mu on
github and for people learning programming using Mu.
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Reorganize further to make edit/008-sandbox-test more self-contained.
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If you restore 2 sandboxes, the first render was setting
response-starting-row-on-screen on both, without ever rendering a
response. If the lower sandbox contained a print and rendered the screen
instead of the response, the original response-starting-row-on-screen
was never reset. If the process of running the sandboxes caused the
lower sandbox's title bar to move below the now-stale
response-starting-row-on-screen[1], editing the lower sandbox no longer
works.
[1] (Either because the upper sandbox prints to screen as well (causing
the first F4 to move the lower sandbox down by several lines), or
because a fresh sandbox is created with several lines before the first
F4 is hit.)
Current solution: never set response-starting-row-on-screen during
reload (or otherwise when there's no response).
This is hard to test right now because 'restore' is not a tested
interface, and I can't come up with another situation where the
response-starting-row-on-screen goes stale. So I'm now trying to keep
all changes to response-starting-row-on-screen close together. Another
idea is to add a check that the click row lies below the
response-starting row *and* above the start of the next sandbox. (But
what if there's no next sandbox?)
(This bug is really a regression, introduced last Sep in 2163.)
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I spent the longest time trying to understand what bug 2268 fixed. But
it's being tested now.
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Somehow this never transferred over from the Arc version until now.
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I'd feared that the refcount errors in the previous commit meant there
was a bug in my ref-counting, so I temporarily used new variables rather
than reusing existing ones. But it turns out the one remaining place
memory corruption can happen is when recipes don't use default-scope and
so end up sharing memory. Don't I have a warning for this?
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When I first forked it from the edit/ app, I wasn't sure how to deal
with changing the recipe side when the only way the program accesses it
is with the untestable 'restore' hack. Now we introduce a little hook
into event-loop and pass in any updated recipe side directly.
In the process I've cleaned up several minor stylistic inconsistencies
between edit/ and sandbox/ apps.
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Finish 2595.
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This required completely redesigning scrolling.
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