Use a better format for the version reporting in the "About MacVim" page
to be clear what's the Vim version, and what's specifically the MacVim
release number.
Also, store the last used MacVim version number. This isn't used right
now but may be used later for showing up a "What's New" page when
updating to a new version, primarily for non-Sparkle users (e.g.
Homebrew builds) so they can still be notified when something changed.
Storing this number now allows us to know in a later build whether the
user has upgraded to the build or starting a new build from fresh (where
we may not want to show the "What's New" page as everything would be
new).
Part of addressing #1293
This fixes the issue where particularly tall characters will get clipped
at the row boundary. This happens because even though a font describes
the line height with font metrics, individual glyphs do not have to
respect them, and we can see with emoji rendering sometimes they can
poke upwards past the line height. Also, it's trivially easy to
construct composing characters that become really tall, e.g. "x゙̂⃗", or
Tibetan scripts like "ཧཱུྃ".
To fix this, we do the following:
1. Remove the explicit clipping call at rendering.
2. Fix partial redraw to not lead to clipping / corruption. This is
quite tricky, because let's say we have a character that is tall
enough to touch other lines, if those lines are redraw but not the
line with the tall char, the redraw will paint over the parts of the
glyphs poking through. Alternatively if we redraw the line with the
tall chars we also need to expand the redraw region to make sure
other lines get repainted as well. To fix this properly, we should do
a proper glyph calculation when we receive the draw command before we
issue before we call `setNeedsDisplayInRect`, but since right now we
only extract glyph info later (during drawRect call), it's too late.
We just do the hacky solution by storing a variable
`redrawExpandRows` that tracks how many lines to expand for all
lines. It's a little hacky since this will affect all lines
permanently regardless if they have tall characters or not. The
proper fix may come later as an optimization (or when we do hardware
rendering via Metal).
3. Re-order the rendering so we have a two pass system, where we first
draw the background fill color for all rows, then the text. This
helps prevent things like Vim's window split or cursorline from
obscuring the text.
4. Add a preference to turn on clipping (old behavior). This helps
prevent odd issues with really tall texts (e.g. Zalgo text) making it
hard to see what's going on. The preference `MMRendererClipToRow` is
not exposed in UI for now as it's a relatively niche. It will be
exposed later when we have a dedicated render tab in settings.
Note that a lot of these characters only show their full height by doing
`set maxcombine=8` because the default (2) is quite low.
Part of the fix for #995
MacVim previously didn't really render composing characters with
multiple glyphs correctly. For simple ones like 'â' it would work fine
because Core Text just generates one glyph for it, but for more
complicated ones like 'x⃗' the renderer didn't properly query the advance
of the glyphs to put them at the correct position. Refactor the logic to
keep track of the current cell/glyphs and make sure to track the
advances fo the glyphs so the composing chars' glyphs would be laid out
properly on top of the cell.
We need to be careful with the tracking, because in Vim we force the
text rendering to be monospaced, and so we maintain the tracking within
a single grapheme (which can consist of multiple glyphs), but when we
move to the next grapheme we reset the position so we can get proper
monospaced rendering even for non-monospaced texts like CJK or stylized
texts.
Fix#995Fix#1172
I have looked and I do not believe there is a good reason to do this
rounding up at all. I believe the motivation is to align the baseline
with the pixel boundary, but I don't believe that is necessary, given
that Core Text will properly perform the correct antialiasing for us.
Most texts aren't directly aligned at the baseline anyway. Before, that
ceil() option is a reason why sometimes fonts would feel pushed upwards,
clipping emojis to the top, and creating a lopsided effect for fonts
like Fira Code (h11), since we draw the boxes aligned to the line
height at the bottom of the descender, meaning the ceil() has an effect
of pushing the text up.
The setting was added to "preserve" the font's original line spacing
intents, but after further investigation I cannot find why Apple's
calculation for font line spacing to be so wide. Furthermore it's quite
odd because the default line spacing is wide, but the only thing that
setting does is by re-initializing the font under Core Text (instead of
using NSFont like the default) using CTFont and somehow the issue is
fixed. Inspecting font metrics (using ttx) also didn't seem to give any
hints why the spacing are so wide (e.g. ascent / descent / line gap etc
all look fine). A StackOverflow comment seems to suggest that Apple is
simply adding a 1.2x scale to some fonts
(https://stackoverflow.com/questions/5511830/how-does-line-spacing-work-in-core-text-and-why-is-it-different-from-nslayoutm)
which seems to match the observation. My guess is that Apple looks at
some fonts and think they are too aggressive in their font metrics
design and "helpfully" introduces a 1.2x multiplier to space them out,
where Core Text is lower level than AppKit and therefore does not have
this auto-inflation.
By renaming the option it should make it clearer that this is a somewhat
arbitrary distinction instead of it being an inherent property of the
font.
Problem: MS-Windows: scrollback cropped off on Vim exit.
Solution: Don't call SetConsoleScreenBufferInfoEx when using the alternate
screen buffer. (Christopher Plewright, closes#11882)
Problem: Cursor briefly displayed in a wrong position when pressing Esc in
Insert mode after autoindent was used.
Solution: Do not adjust the cursor position for assumed deleted white space
if text is following. (closes#11877)
Problem: Cannot access a private object member in a lambda defined inside
the class.
Solution: Go up the context stack to find the class. (closes#11866)
Problem: :runtime completion can be further improved.
Solution: Also complete the {where} argument values and adjust the
completion for that. (closes#11874)
Problem: Spurious empty line when using text propertie and virtual text.
Solution: Do not set "text_prop_follows" when the other text property is not
virtual text. (closes#11846)
