This codepath was not previously tested (an accident). Upon testing
this codepath its clear to see the logic was incorrect. When we have to
remove rows from our scrollback to fit new rows in the circular buffer,
we have to delete graphemes, but we were deleting them from the wrong
row offset.
For the row offset, we previously used the _active_ screen but the
proper offset is the _full_ screen. Tests verify.
Fixes#1329
Some shells and scripts use spaces and soft-wrapping as a way to move to
the next line instead of using newline (`\n`). Line selection
(triple-click by default) considers a soft-wrapped line as a single
line, so it was selecting the prompt.
This commit makes it so line selection considers semantic prompt state
(prompt vs command output) an additional boundary condition. This
requires shell integration but will make selection behave more
expectedly.
Rather than immediately converting a color palette index into an RGB
value for a cell color, when a palette color is used track the palette
color directly in the cell state and convert to an RGB value in the
renderer.
This causes palette color changes to take effect immediately instead of
only for newly drawn cells.
Fixes#1159
The cursor position is an "active" coordinate (defined at the top of
Screen.zig), but our resize was treating it as a "viewport" coordinate.
This adds rectangle select mode; when dragging with ctrl+alt (or
super+alt on MacOS), this allows you to select a rectangular region of
the terminal instead of the full start-end points of the buffer.
Fixes#906
This changes our resize behavior when increasing row height.
If the cursor was originally at the bottom of the viewport, existing
scrollback (if it exists) will be "pulled down" from the top,
effectively keeping the cursor at the bottom. This is the behavior
today, prior to this commit.
If the cursor is not at the bottom of the viewport, scrollback will NOT
be "pulled down" and instead blank lines will be added _below_. This is
new behavior.
