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| -rw-r--r-- | doc/colorschemes.md | 77 | ||||
| -rw-r--r-- | doc/colorschemes.txt | 92 |
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diff --git a/doc/colorschemes.md b/doc/colorschemes.md new file mode 100644 index 00000000..eb8bdef0 --- /dev/null +++ b/doc/colorschemes.md @@ -0,0 +1,77 @@ +# Colorschemes + +This text explains colorschemes and how they work. + +## Context Tags + +Context Tags provide information about the context. If the tag `in_titlebar` is +set, you probably want to know about the color of a part of the titlebar now. + +There are a number of context tags, specified in /ranger/gui/context.py in the +constant `CONTEXT_KEYS`. + +A Context object, defined in the same file, contains attributes with the names +of all tags, whose values are either True or False. + +## Implementation in the GUI Classes + +The class CursesShortcuts in the file `/ranger/gui/curses_shortcuts.py` defines +the methods `color(*tags)`, `color_at(y, x, wid, *tags)` and `color_reset()`. +This class is a superclass of Displayable, so these methods are available almost +everywhere. + +Something like `color("in_titlebar", "directory")` will be called to get the +color of directories in the titlebar. This creates a `ranger.gui.context.Context` +object, sets its attributes `in_titlebar` and `directory` to True, leaves the +others as False, and passes it to the colorscheme's `use(context)` method. + +## The Color Scheme + +A colorscheme should be a subclass of `ranger.gui.ColorScheme` and define the +method `use(context)`. By looking at the context, this use-method has to +determine a 3-tuple of integers: `(foreground, background, attribute)` and return +it. + +`foreground` and `background` are integers representing colors, `attribute` is +another integer with each bit representing one attribute. These integers are +interpreted by the used terminal emulator. + +Abbreviations for colors and attributes are defined in `ranger.gui.color`. Two +attributes can be combined via bitwise OR: bold | reverse + +Once the color for a set of tags is determined, it will be cached by default. If +you want more dynamic colorschemes (such as a different color for very large +files), you will need to dig into the source code, perhaps add an own tag and +modify the draw-method of the widget to use that tag. + +Run `tc_colorscheme` to check if your colorschemes are valid. + +## Specify a Colorscheme + +Colorschemes are searched for in these directories: + +- `~/.config/ranger/colorschemes/` +- `/path/to/ranger/colorschemes/` + +To specify which colorscheme to use, change the option `colorscheme` in your +rc.conf: `set colorscheme default`. + +This means, use the colorscheme contained in either +`~/.config/ranger/colorschemes/default.py` or +`/path/to/ranger/colorschemes/default.py`. + +## Adapt a colorscheme + +You may want to adapt a colorscheme to your needs without having a complete copy +of it, but rather the changes only. Say, you want the exact same colors as in +the default colorscheme, but the directories to be green rather than blue, +because you find the blue hard to read. + +This is done in the jungle colorscheme `ranger/colorschemes/jungle`, check it +out for implementation details. In short, I made a subclass of the default +scheme, set the initial colors to the result of the default `use()` method and +modified the colors how I wanted. + +This has the obvious advantage that you need to write less, which results in +less maintenance work and a greater chance that your colorscheme will work with +future versions of ranger. diff --git a/doc/colorschemes.txt b/doc/colorschemes.txt deleted file mode 100644 index 145cc94e..00000000 --- a/doc/colorschemes.txt +++ /dev/null @@ -1,92 +0,0 @@ -Colorschemes -============ - -This text explains colorschemes and how they work. - - -Context Tags ------------- - -Context Tags provide information about the context. If the tag -"in_titlebar" is set, you probably want to know about the color -of a part of the titlebar now. - -There are a number of context tags, specified in /ranger/gui/context.py -in the constant CONTEXT_KEYS. - -A Context object, defined in the same file, contains attributes with -the names of all tags, whose values are either True or False. - - -Implementation in the GUI Classes ---------------------------------- - -The class CursesShortcuts in the file /ranger/gui/curses_shortcuts.py -defines the methods color(*tags), color_at(y, x, wid, *tags) and -color_reset(). This class is a superclass of Displayable, so these -methods are available almost everywhere. - -Something like color("in_titlebar", "directory") will be called to -get the color of directories in the titlebar. This creates a -ranger.gui.context.Context object, sets its attributes "in_titlebar" and -"directory" to True, leaves the others as False, and passes it to the -colorscheme's use(context) method. - - -The Color Scheme ----------------- - -A colorscheme should be a subclass of ranger.gui.ColorScheme and -define the method use(context). By looking at the context, this use-method -has to determine a 3-tuple of integers: (foreground, background, attribute) -and return it. - -foreground and background are integers representing colors, -attribute is another integer with each bit representing one attribute. -These integers are interpreted by the used terminal emulator. - -Abbreviations for colors and attributes are defined in ranger.gui.color. -Two attributes can be combined via bitwise OR: bold | reverse - -Once the color for a set of tags is determined, it will be cached by -default. If you want more dynamic colorschemes (such as a different -color for very large files), you will need to dig into the source code, -perhaps add an own tag and modify the draw-method of the widget to use -that tag. - -Run tc_colorscheme to check if your colorschemes are valid. - - -Specify a Colorscheme ---------------------- - -Colorschemes are searched for in these directories: -~/.config/ranger/colorschemes/ -/path/to/ranger/colorschemes/ - -To specify which colorscheme to use, change the option "colorscheme" -in your rc.conf: -set colorscheme default - -This means, use the colorscheme contained in -either ~/.config/ranger/colorschemes/default.py or -/path/to/ranger/colorschemes/default.py. - - -Adapt a colorscheme -------------------- - -You may want to adapt a colorscheme to your needs without having -a complete copy of it, but rather the changes only. Say, you -want the exact same colors as in the default colorscheme, but -the directories to be green rather than blue, because you find the -blue hard to read. - -This is done in the jungle colorscheme ranger/colorschemes/jungle, -check it out for implementation details. In short, I made a subclass -of the default scheme, set the initial colors to the result of the -default use() method and modified the colors how I wanted. - -This has the obvious advantage that you need to write less, which -results in less maintenance work and a greater chance that your colorscheme -will work with future versions of ranger. |