We budget size based on the x_advance, which can be 1 pixel less
than the width of the glyph texture, so we could often end up
omitting the last character in "Launcher" or "default" in the
tab title or right status area.
This commit uses x_advance in both places.
Make the scrolling mostly independent of the active row; adjust
the top row when hitting the top/bottom edges of the display.
Mouse movement no longer changes the scroll position. Instead,
the wheel is used to scroll the list.
refs: https://github.com/wez/wezterm/issues/1485
* #1457 Initial commit compiles but doesn't yet work
* #1457 Fix cell offsets
* #1457 refactor, ClickPosition
* fix nits
* #1457 filter per-pixel motion when not in SGR-Pixels mode
* Much cleaner match condition for filtering mouse events based on encoding protocol
I generated nerdfonts_data.rs with this shell script; it uses `i_all.sh`
from the nerdfonts repo to get the base mapping:
```
source ./lib/i_all.sh
echo "//! Data mapping nerd font symbol names to their char codepoints"
echo "pub const NERD_FONT_GLYPHS: &[(&str, char)] = &["
for var in "${!i@}"; do
# trim 'i_' prefix
glyph_name=${var#*_}
glyph_char=${!var}
glyph_code=$(printf "%x" "'$glyph_char'")
echo "(\"$glyph_name\", '\u{$glyph_code}'), // $glyph_char"
done
echo "];"
```
Then intent is to use it in wezterm:
```
local wezterm = require 'wezterm'
wezterm.log_info(wezterm.nerdfonts.dev_mozilla)
```
Built using:
```
./FontForge-2020-11-07-21ad4a1-x86_64.AppImage --script $PWD/font-patcher "$PWD/src/unpatched-fonts/NerdFontsSymbolsOnly/NerdFontsSymbolsOnly Template 1000 em.ttf" --powerline --use-single-width-glyphs -out /tmp/nerd-fonts-out --fontawesome --fontawesomeextension --fontlinux --octicons --codicons --powersymbols --powerline --powerlineextra --mdi --weathericons
```
which is everything *except* Pomicons at the time of writing, pending
clarifications of its distribution license
(https://github.com/ryanoasis/nerd-fonts/issues/266)
refs: https://github.com/wez/wezterm/issues/1521
It's a little ambiguous whether we should cancel the mode when moving
the cursor explicitly; I opted to do it when we move it due to newline
processing, or when its y position is changed.
refs: #1539
