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13303416b8
Add more text roles and links. Fix typos. Adjust the default shortcut order in overview. Notes on the impact of kitty-open.desktop on the default open apps. Document KITTY_DEVELOP_FROM in glossary. Add Python type hints to the watcher example. Mention clone-in-kitty in launch --copy-env. Fix remote control ls example does not work, by escaping the backslash.
38 lines
1.4 KiB
ReStructuredText
38 lines
1.4 KiB
ReStructuredText
Colored and styled underlines
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================================
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|kitty| supports colored and styled (wavy) underlines. This is of particular use
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in terminal based text editors such as :program:`vim` and :program:`emacs` to
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display red, wavy underlines under mis-spelled words and/or syntax errors. This
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is done by re-purposing some SGR escape codes that are not used in modern
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terminals (`CSI codes <https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_(Control_Sequence_Introducer)_sequences>`__)
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To set the underline style::
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<ESC>[4:0m # no underline
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<ESC>[4:1m # straight underline
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<ESC>[4:2m # double underline
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<ESC>[4:3m # curly underline
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<ESC>[4:4m # dotted underline
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<ESC>[4:5m # dashed underline
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<ESC>[4m # straight underline (for backwards compat)
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<ESC>[24m # no underline (for backwards compat)
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To set the underline color (this is reserved and as far as I can tell not
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actually used for anything)::
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<ESC>[58...m
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This works exactly like the codes ``38, 48`` that are used to set foreground and
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background color respectively.
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To reset the underline color (also previously reserved and unused)::
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<ESC>[59m
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The underline color must remain the same under reverse video, if it has a color,
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if not, it should follow the foreground color.
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To detect support for this feature in a terminal emulator, query the terminfo
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database for the ``Su`` boolean capability.
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