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Standardize functions to put the main object being modified first.
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Turns out all I had to do was reset `go-render?` to false.
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This change is interesting because I only updated one test to gain confidence
that F4 will never redraw the recipe side. (Most of the changes are to
explicitly render-all before each scenario.)
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There seems to be some chance of speed-up when I inline these functions.
However, it's not a clear enough signal to justify improving the `build`
script to handle the `inline` keyword.
Current timing experiments:
Before After
ubuntu 1GB 9:22,8:48,8:51,9:16,9:17,8:36,9:05 8:55,8:41,8:15,8:27,8:29,8:54,9:29
OS X 8GB 4:05,4:00,4:18,4:09,3:40,3:51,3:56 3:58,3:52,4:01,4:13,4:16,4:31,4:13
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Fix a keyboard shortcut conflict in commit 3884.
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We're currently spending 50% of our time in `mu edit` performing refcount
updates.
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Time to make my ad hoc commented out code fragments a first-class feature.
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It's always confusing when `break` refers to a `switch` but `continue`
refers to the loop around the `switch`. But we've done ugly things like
this and `goto` for expedience. However, we're starting to run into cases
where we now need to insert code at every `continue` or `continue`-mimicking
`goto` inside the core interpreter loop. Better to make the loop single-entry-single-exit.
Common things to run after every instruction will now happen inside the
`finish_instruction` function rather than at the `finish_instruction` label.
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Hook up fake screen to scroll properly on cursor-down.
Thanks Lakshman Swaminathan for finding this hole in commit 3860 with your
incessant fidgeting :)
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Thanks Juan Crispin Hernandez for the suggestion.
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Thanks Ella Couch for reporting this issue.
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Improve fix of commit 3866.
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Starting to look for lack of organization in the edit/ app.
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Strange race condition: if I repeatedly press <enter> and <backspace> so
the screen is constantly playing catch up, it will sometimes fail these
assertions when it does eventually catch up. Somehow the cursor ends up
misplaced. Let's just take them out. It's likely some low-level implementation
detail of the terminal.
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Clean up a few superficial things in Caleb's commit.
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Yet another bugfix, this time in just the sandbox/ app:
open sandbox/ with empty lesson/ directory
type 'a'
press backspace
cursor was not moving left
Now fixed.
Turns out the sandbox/ app hadn't been working right since commit 3854.
(Which ironically was a revert but clearly didn't revert enough; the last
truly good commit was 3823, and we're still clawing our way back to the
sunlight.)
The issue in this case was that commit 3853 disabled update-cursor in some
situations when it shouldn't have. To be safe, just always update-cursor
one very event. I should probably reorganize this in edit/ as well, but
it's not necessary for this particular bug.
---
Incidentally, as part of my git bisecting I realized that the bug fixed
in the trace browser as part of commit 3862 was very old:
press '/'
press some key
press ctrl-u to erase
press some key
= out of bounds string access
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Being able to `cout` directly in raw mode isn't going to be more than a
neat gimmick; we need to maintain control over colors. (The sandbox/ app
was getting messed up because it just so happened that the next thing being
printed to screen after the `Run` button was clear-display-from, which
used `cout` with the same colors as the button.)
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Thanks Lakshman Swaminathan for running into this bug.
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As the finishing touch on commit 3860, completely decouple the termbox
API between moving the cursor and printing at the cursor.
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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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Lose the ability to hide the cursor. If we want to stop buffering the screen
in termbox, it needs to go.
What's more, it has no tests.
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Bugfix on commit 3853: clear `render-all-on-no-more-events` once you've
actually run the `render-all`.
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