The goal is to make the editor behave like a standard block-level
element.
The horizontal behavior is simple: we stretch horizontally to fill our
container.
The vertical behavior is more nuanced. If an explicit height is assigned
on the wrapper view, we honor that height. But if no explicit height is
assigned, the editor stretches vertically so that its contents are
visible.
This prepares us to support mini editors, which need to be 1-line tall
without an explicit height assignment.
Fixes#2367
* The indent level of empty lines is the *max* of the nearest non empty
line, rather than favoring the level of the line below.
* An extra wrap guide is no longer rendered for empty lines
I didn't port the specs over because we already had good coverage at the
model level. It just needed to be updated for the preferred behavior.
Fixes#2815
This commit changes our autoscroll strategy for cursors significantly.
Originally, we were autoscrolling whenever the cursor's marker changed
positions. This worked well, except we didn't end up autoscrolling when
the user *attempted* to move the cursor to an invalid position, such as
moving down at the end of the buffer, due to the fact that the marker
wouldn't change.
Then, we moved to always requesting an autoscroll whenever a position
change was requested via Cursor::changePosition. This missed out on
moving the cursor when inserting text, so we then also added an explicit
autoscroll call when inserting text.
This had the problem of not autoscrolling due to undo. So finally, this
solution combines explicit autoscroll in ::changePosition to capture
intent, as well as implicit autoscrolling whenever the cursor's marker
position changes due to a textual change in the buffer. This captures
undo/redo correctly.
Fixes#2810
The line corresponding to the longest screen row moves when lines are
inserted or removed above it, so we need to adjust it accordingly or we
won't always realize when a change affects the longest line.
This prevents feedback loops where we handle stale 'scroll' events
for scrolls requested in the model layer. It prevents jitter when
autoscrolling with the cursor.
I previously thought this was okay, but now I'm experiencing jitter when
scrolling with the trackpad when updates are deferred, and the frames
seem jagged. So this commit restores a synchronous approach to display
updates whenever we use animation frames.
