Fixes#845
Quick background: Emoji codepoints are either default text or default
graphical ("Emoji") presentation. An example of a default text emoji
is ❤. You have to add VS16 to this emoji to get: ❤️. Some font are
default graphical and require VS15 to force text.
A font face can only advertise text vs emoji presentation for the entire
font face. Some font faces (i.e. Cozette) include both text glyphs and
emoji glyphs, but since they can only advertise as one, advertise as
"text".
As a result, if a user types an emoji such as 👽, it will fallback to
another font to try to find a font that satisfies the "graphical"
presentation requirement. But Cozette supports 👽, its just advertised
as "text"!
Normally, this behavior is what you want. However, if a user explicitly
requests their font-family to be a font that contains a mix of test and
emoji, they _probably_ want those emoji to be used regardless of default
presentation. This is similar to a rich text editor (like TextEdit on
Mac): if you explicitly select "Cozette" as your font, the alien emoji
shows up using the text-based Cozette glyph.
This commit changes our presentation handling behavior to do the
following:
* If no explicit variation selector (VS15/VS16) is specified,
any matching codepoint in an explicitly loaded font (i.e. via
`font-family`) will be used.
* If an explicit variation selector is specified or our explicitly
loaded fonts don't contain the codepoint, fallback fonts will be
searched but require an exact match on presentation.
* If no fallback is found with an exact match, any font with any
presentation can match the codepoint.
This commit should generally not change the behavior of Emoji or VS15/16
handling for almost all users. The only users impacted by this commit
are specifically users who are using fonts with a mix of emoji and text.
When shift is held, we are bypassing mouse reporting mode. Change the
cursor to text to indicate this to the user. On release, change back to
whatever we were before.
Changes:
- Add WindowsPty, which uses the ConPTY API to create a pseudo console
- Pty now selects between PosixPty and WindowsPty
- Windows support in Command, including the ability to launch a process with a pseudo console
- Enable Command tests on windows
- Add some environment variable abstractions to handle the missing libc APIs on Windows
- Windows version of ReadThread
The resizeIncrements property is only modified when the cell size of the
focused window changes. If two splits have the same cell size then the
property is not modified when focusing between the two splits.
