Refactor color string to RGB code into autoloads
Expose 2 more functions as autoloads: csapprox#common#color_name_to_hex(name) - Resolve a color name (like PapayaWhip) to hex (#ffefd5) csapprox#common#hex_to_rgb(hex) - Split a hex color (like #ffefd5) to a list ([ 255, 239, 213 ])
This commit is contained in:
Matt Wozniski
parent
e0a472238c
commit
7f0186d6bc
@ -23,6 +23,8 @@
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" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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" SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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" {>1} Handle terminal color cubes
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let s:xterm_colors = [ 0x00, 0x5F, 0x87, 0xAF, 0xD7, 0xFF ]
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let s:eterm_colors = [ 0x00, 0x2A, 0x55, 0x7F, 0xAA, 0xD4 ]
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let s:konsole_colors = [ 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF ]
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@ -76,3 +78,144 @@ endfunction
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function! csapprox#common#Colors()
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return s:{csapprox#common#PaletteType()}_colors
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endfunction
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" {>1} Handle color names
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" Place to store rgb.txt name to color mappings - lazy loaded if needed
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let s:rgb = {}
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" {>2} Builtin gui color names
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" gui_x11.c and gui_gtk_x11.c have some default colors names that are searched
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" if the x server doesn't know about a color. If 'showrgb' is available,
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" we'll default to using these color names and values, and overwrite them with
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" other values if 'showrgb' tells us about those colors.
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let s:rgb_defaults = { "lightred" : "#FFBBBB",
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\ "lightgreen" : "#88FF88",
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\ "lightmagenta" : "#FFBBFF",
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\ "darkcyan" : "#008888",
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\ "darkblue" : "#0000BB",
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\ "darkred" : "#BB0000",
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\ "darkmagenta" : "#BB00BB",
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\ "darkgrey" : "#BBBBBB",
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\ "darkyellow" : "#BBBB00",
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\ "gray10" : "#1A1A1A",
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\ "grey10" : "#1A1A1A",
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\ "gray20" : "#333333",
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\ "grey20" : "#333333",
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\ "gray30" : "#4D4D4D",
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\ "grey30" : "#4D4D4D",
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\ "gray40" : "#666666",
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\ "grey40" : "#666666",
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\ "gray50" : "#7F7F7F",
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\ "grey50" : "#7F7F7F",
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\ "gray60" : "#999999",
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\ "grey60" : "#999999",
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\ "gray70" : "#B3B3B3",
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\ "grey70" : "#B3B3B3",
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\ "gray80" : "#CCCCCC",
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\ "grey80" : "#CCCCCC",
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\ "gray90" : "#E5E5E5",
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\ "grey90" : "#E5E5E5" }
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" {>2} Colors that vim will use by name in one of the default schemes, either
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" for bg=light or for bg=dark. This lets us avoid loading the entire rgb.txt
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" database when the scheme itself doesn't ask for colors by name.
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let s:rgb_presets = { "black" : "#000000",
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\ "blue" : "#0000ff",
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\ "brown" : "#a52a2a",
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\ "cyan" : "#00ffff",
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\ "darkblue" : "#00008b",
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\ "darkcyan" : "#008b8b",
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\ "darkgrey" : "#a9a9a9",
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\ "darkmagenta" : "#8b008b",
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\ "green" : "#00ff00",
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\ "grey" : "#bebebe",
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\ "grey40" : "#666666",
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\ "grey90" : "#e5e5e5",
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\ "lightblue" : "#add8e6",
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\ "lightcyan" : "#e0ffff",
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\ "lightgrey" : "#d3d3d3",
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\ "lightmagenta" : "#ffbbff",
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\ "magenta" : "#ff00ff",
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\ "red" : "#ff0000",
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\ "seagreen" : "#2e8b57",
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\ "white" : "#ffffff",
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\ "yellow" : "#ffff00" }
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" {>2} Find available color names
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" Find the valid named colors. By default, use our own rgb list, but try to
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" retrieve the system's list if g:CSApprox_use_showrgb is set to true. Store
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" the color names and color values to the dictionary s:rgb - the keys are
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" color names (in lowercase), the values are strings representing color values
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" (as '#rrggbb').
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function! s:UpdateRgbHash()
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try
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if !exists("g:CSApprox_use_showrgb") || !g:CSApprox_use_showrgb
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throw "Not using showrgb"
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endif
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" We want to use the 'showrgb' program, if it's around
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let lines = split(system('showrgb'), '\n')
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if v:shell_error || !exists('lines') || empty(lines)
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throw "'showrgb' didn't give us an rgb.txt"
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endif
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let s:rgb = copy(s:rgb_defaults)
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" fmt is (blanks?)(red)(blanks)(green)(blanks)(blue)(blanks)(name)
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let parsepat = '^\s*\(\d\+\)\s\+\(\d\+\)\s\+\(\d\+\)\s\+\(.*\)$'
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for line in lines
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let v = matchlist(line, parsepat)
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if len(v) < 0
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throw "CSApprox: Bad RGB line: " . string(line)
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endif
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let s:rgb[tolower(v[4])] = printf("#%02x%02x%02x", v[1], v[2], v[3])
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endfor
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catch
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try
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let s:rgb = csapprox#rgb()
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catch
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echohl ErrorMsg
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echomsg "Can't call rgb() from autoload/csapprox.vim"
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echomsg "Named colors will not be available!"
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echohl None
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endtry
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endtry
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return 0
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endfunction
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" {>2} Resolve color names
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" Given a color name, return the color as "#rrggbb". Throws if the name
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" cannot be resolved.
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function! csapprox#common#color_name_to_hex(name)
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let val = tolower(a:name)
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try
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" First see if it is in our preset-by-vim rgb list
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let val = s:rgb_presets[val]
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catch
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" Then try loading and checking our real rgb list
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if empty(s:rgb)
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call s:UpdateRgbHash()
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endif
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let val = s:rgb[val] " Throws if the key can't be found
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endtry
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return val
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endfunction
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" {>2} Hex color to r, g, b
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" Given a hex color string ("#rrggbb", with or without the leading '#'),
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" return the a list containing the red, green, and blue components as ints.
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function! csapprox#common#hex_to_rgb(hex)
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let val = substitute(a:hex, '^#', '', '')
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let r = str2nr(val[0:1], 16)
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let g = str2nr(val[2:3], 16)
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let b = str2nr(val[4:5], 16)
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return [r, g, b]
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endfunction
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" {0} vim:sw=2:sts=2:et:fdm=expr:fde=substitute(matchstr(getline(v\:lnum),'^\\s*"\\s*{\\zs.\\{-}\\ze}'),'^$','=','')
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@ -175,114 +175,6 @@ function! s:SynGuiSpAttr(idx)
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return synIDattr(a:idx, 'sp#', 'gui')
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endfunction
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" {>1} Handle color names
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" Place to store rgb.txt name to color mappings - lazy loaded if needed
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let s:rgb = {}
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" {>2} Builtin gui color names
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" gui_x11.c and gui_gtk_x11.c have some default colors names that are searched
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" if the x server doesn't know about a color. If 'showrgb' is available,
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" we'll default to using these color names and values, and overwrite them with
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" other values if 'showrgb' tells us about those colors.
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let s:rgb_defaults = { "lightred" : "#FFBBBB",
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\ "lightgreen" : "#88FF88",
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\ "lightmagenta" : "#FFBBFF",
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\ "darkcyan" : "#008888",
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\ "darkblue" : "#0000BB",
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\ "darkred" : "#BB0000",
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\ "darkmagenta" : "#BB00BB",
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\ "darkgrey" : "#BBBBBB",
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\ "darkyellow" : "#BBBB00",
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\ "gray10" : "#1A1A1A",
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\ "grey10" : "#1A1A1A",
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\ "gray20" : "#333333",
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\ "grey20" : "#333333",
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\ "gray30" : "#4D4D4D",
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\ "grey30" : "#4D4D4D",
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\ "gray40" : "#666666",
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\ "grey40" : "#666666",
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\ "gray50" : "#7F7F7F",
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\ "grey50" : "#7F7F7F",
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\ "gray60" : "#999999",
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\ "grey60" : "#999999",
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\ "gray70" : "#B3B3B3",
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\ "grey70" : "#B3B3B3",
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\ "gray80" : "#CCCCCC",
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\ "grey80" : "#CCCCCC",
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\ "gray90" : "#E5E5E5",
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\ "grey90" : "#E5E5E5" }
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" {>2} Colors that vim will use by name in one of the default schemes, either
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" for bg=light or for bg=dark. This lets us avoid loading the entire rgb.txt
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" database when the scheme itself doesn't ask for colors by name.
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let s:rgb_presets = { "black" : "#000000",
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\ "blue" : "#0000ff",
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\ "brown" : "#a52a2a",
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\ "cyan" : "#00ffff",
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\ "darkblue" : "#00008b",
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\ "darkcyan" : "#008b8b",
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\ "darkgrey" : "#a9a9a9",
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\ "darkmagenta" : "#8b008b",
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\ "green" : "#00ff00",
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\ "grey" : "#bebebe",
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\ "grey40" : "#666666",
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\ "grey90" : "#e5e5e5",
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\ "lightblue" : "#add8e6",
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\ "lightcyan" : "#e0ffff",
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\ "lightgrey" : "#d3d3d3",
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\ "lightmagenta" : "#ffbbff",
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\ "magenta" : "#ff00ff",
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\ "red" : "#ff0000",
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\ "seagreen" : "#2e8b57",
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\ "white" : "#ffffff",
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\ "yellow" : "#ffff00" }
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" {>2} Find available color names
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" Find the valid named colors. By default, use our own rgb list, but try to
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" retrieve the system's list if g:CSApprox_use_showrgb is set to true. Store
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" the color names and color values to the dictionary s:rgb - the keys are
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" color names (in lowercase), the values are strings representing color values
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" (as '#rrggbb').
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function! s:UpdateRgbHash()
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try
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if !exists("g:CSApprox_use_showrgb") || !g:CSApprox_use_showrgb
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throw "Not using showrgb"
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endif
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" We want to use the 'showrgb' program, if it's around
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let lines = split(system('showrgb'), '\n')
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if v:shell_error || !exists('lines') || empty(lines)
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throw "'showrgb' didn't give us an rgb.txt"
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endif
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let s:rgb = copy(s:rgb_defaults)
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" fmt is (blanks?)(red)(blanks)(green)(blanks)(blue)(blanks)(name)
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let parsepat = '^\s*\(\d\+\)\s\+\(\d\+\)\s\+\(\d\+\)\s\+\(.*\)$'
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for line in lines
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let v = matchlist(line, parsepat)
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if len(v) < 0
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throw "CSApprox: Bad RGB line: " . string(line)
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endif
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let s:rgb[tolower(v[4])] = printf("#%02x%02x%02x", v[1], v[2], v[3])
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endfor
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catch
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try
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let s:rgb = csapprox#rgb()
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catch
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echohl ErrorMsg
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echomsg "Can't call rgb() from autoload/csapprox.vim"
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echomsg "Named colors will not be available!"
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echohl None
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endtry
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endtry
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return 0
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endfunction
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" {>1} Derive and set cterm attributes
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" {>2} List of all possible attributes
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@ -452,22 +344,13 @@ function! s:SetCtermFromGui(hl)
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" rgb.txt color to a #rrggbb color
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if val !~? '^[fb]g$' && val !~ '^#\=\x\{6}$'
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try
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" First see if it is in our preset-by-vim rgb list
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let val = s:rgb_presets[tolower(val)]
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let val = csapprox#common#color_name_to_hex(val)
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catch
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" Then try loading and checking our real rgb list
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if empty(s:rgb)
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call s:UpdateRgbHash()
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" Barf if we can't resolve the color name
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if &verbose
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echomsg "CSApprox: Colorscheme uses unknown color \"" . val . "\""
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endif
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try
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let val = s:rgb[tolower(val)]
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catch
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" And then barf if we still haven't found it
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if &verbose
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echomsg "CSApprox: Colorscheme uses unknown color \"" . val . "\""
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endif
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continue
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endtry
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continue
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endtry
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endif
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@ -475,10 +358,7 @@ function! s:SetCtermFromGui(hl)
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exe 'hi ' . hl.name . ' cterm' . which . '=' . val
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let hl.cterm[which] = val
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elseif val =~ '^#\=\x\{6}$'
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let val = substitute(val, '^#', '', '')
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let r = str2nr(val[0:1], 16)
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let g = str2nr(val[2:3], 16)
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let b = str2nr(val[4:5], 16)
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let [r, g, b] = csapprox#common#hex_to_rgb(val)
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let hl.cterm[which] = g:CSApprox_approximator_function(r, g, b)
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exe 'hi ' . hl.name . ' cterm' . which . '=' . hl.cterm[which]
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else
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