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Switch to high number OSC codes instead of DCS string codes for dynamic color push/pop

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Kovid Goyal 2018-06-15 15:21:46 +05:30
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3 changed files with 29 additions and 18 deletions
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19
docs/protocol-extensions.rst
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@ -165,3 +165,22 @@ For example, to set the background color to blue in a
rectangular region of the screen from (3, 4) to (10, 11), you use::
<ESC>[2*x<ESC>[4;3;11;10;44$r<ESC>[*x
Saving and restoring the default foreground/background/selection/cursor colors
---------------------------------------------------------------------------------
It is often useful for a full screen application that has its own color themes
to set the default foreground, background, selection and cursor colors. This
allows for various performance optimizations when drawing the screen. The
problem is that if the user previously used the escape codes to change these
colors herself, then running the full screen application will overwrite her
changes even after it exits. To avoid this, kitty introduces a new pair of
*OSC* escape codes to push and pop the current color values from a stack::
<ESC>]30001<ESC>\ # push onto stack
<ESC>]30101<ESC>\ # pop from stack
These escape codes save/restore the so called *dynamic colors*, default
background, default foreground, selection background, selection foreground and
cursor color.