| Commit message (Collapse) | Author | Age | Files | Lines |
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Just checking mouse.isDown works if the editor is the entirety of the
app, as is true in this fork. However, we often want to introduce other
widgets. We'd like tapping on them to not cause the selection to flash:
https://news.ycombinator.com/context?id=38404923&submission=38397715
The right architecture to enforce this is: have each layer of the UI
maintain its own state machine between mouse_press and mouse_release
events. And only check the state machine in the next level down rather
than lower layers or the bottommost layer of raw LÖVE.
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Each one should provide a message that will show up within LÖVE. Stop
relying on nearby prints to the terminal.
I also found some unnecessary ones.
There is some potential here for performance regressions: the format()
calls will trigger whether or not the assertion fails, and cause
allocations. So far Lua's GC seems good enough to manage the load even
with Moby Dick, even in some situations that caused issues in the past
like undo.
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To fix this I have to first stop incrementally updating screen_bottom1
in the middle of a frame. Now it always has a good value from the end of
a frame.
I'm also running into some limitations in the test I'd ideally like to
write (that are documented in a comment), but I still get some sort of
automated test for this bugfix.
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It's a hack:
- if you start selecting from below final line the start of the
selection is the most recent click even if it was forever ago
- (the crash we're currently fixing) if you start up and immediately
select all then click below final line => crash. recent_mouse was
never set.
- getting rid of it breaks no tests (except the crash we're currently
fixing)
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This helps, but doesn't address the C-a case. As it stands, literally my
first click of the mouse might need access to recent_mouse.line/pos
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Text.mouse_pos can sometimes set recent_mouse.time but not
recent_mouse.x/y. I'd assumed x/y is never nil in those situations, but
that's violated. It's most easily seen when typing C-a and then
clicking.
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The bug has been spotted twice:
1. In snap.love, I selected text in one node, then another, and hit:
Error: text.lua:789: attempt to compare nil with number
stack traceback:
text.lua:789: in function 'lt1'
select.lua:19: in function 'clip_selection'
text.lua:32: in function 'draw'
edit.lua:117: in function 'draw'
[string "REPL"]:21: in function 'draw'
main.lua:152: in function 'draw'
app.lua:102: in function <app.lua:84>
[C]: in function 'xpcall'
app.lua:112: in function <app.lua:111>
[C]: in function 'xpcall'
Couldn't reproduce.
2. In text.love, inscript selected all text in a small buffer and then
clicked outside the text. And got:
Error: text.lua:784: attempt to compare nil with number
Traceback
[love "callbacks.lua"]:228: in function 'handler'
text.lua:784: in function 'lt1'
select.lua:19: in function 'clip_selection'
text.lua:27: in function 'draw'
edit.lua:117: in function 'draw'
run.lua:136: in function 'draw'
main.lua:148: in function 'draw'
app.lua:42: in function <app.lua:22>
[C]: in function 'xpcall'
This is reproducible, and also across forks.
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In the process I discovered the horrible fact that Text.x allocates a new Text.
And it gets called (just once, thank goodness) on every single frame.
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I have no idea what the performance implications of this are..
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- Text.to_pos_on_line
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- Text.in_line
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- Text.cursor_at_final_screen_line
- Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary
- Text.snap_cursor_to_bottom_of_screen
- Text.in_line
- Text.to_pos_on_line
- Text.to2
- Text.to1
- Text.previous_screen_line
- Text.tweak_screen_top_and_cursor
- Text.redraw_all
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- Text.pos_at_start_of_cursor_screen_line
- Text.cursor_past_screen_bottom
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- record_undo_event
- undo_event
- redo_event
- snapshot
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- Text.draw_highlight
- Text.clip_selection
- Text.selection
- Text.cut_selection
- Text.delete_selection
- Text.delete_selection_without_undo
- Text.mouse_pos
- Text.to_pos
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We're still accessing them through a global. But we'll change that next.
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One advantage of this approach: we don't end up with multiple lexical
scopes containing duplicates of the same modules.
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- Text.pos_at_start_of_cursor_screen_line
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- Text.to_pos_on_line
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- Text.in_line
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- Text.clip_selection
- Text.cut_selection
- Text.delete_selection
- Text.delete_selection_without_undo
- Text.mouse_pos
- Text.to_pos
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Let's just make all the utf8.offset calculations more defensive.
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Not sure where that idiom comes from or why strings work in some places
(auto-coercion?). I picked it up off some example apps. But
https://love2d.org/wiki/love.mouse.isDown says it should be an integer.
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If I'd had this stuff in my test harness earlier, two recent commits
would have failed tests and given me early warning:
ff88238ff1
ff88a2a927
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I need more tests.
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Problem: repeatedly copying (relatively large) sections of text quickly
makes the app sluggish until it has to be killed. (Thanks John Blommers
for the report.)
When I instrument with prints, the sluggishness seems to happen in
random draw() calls many times after I perform the copy.
I don't know for sure, but I'm initially checking if the cause is
garbage generated by repeated string concatenation.
This attempt doesn't seem to make any difference.
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