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vim/CSApprox.vim

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" CSApprox: Make gvim-only colorschemes Just Work terminal vim
" Maintainer: Matthew Wozniski (godlygeek@gmail.com)
" Date: Fri, 14 Sep 2012 01:12:13 -0400
" Version: 4.00
" History: :help csapprox-changelog
"
" Long Description:
" It's hard to find colorschemes for terminal Vim. Most colorschemes are
" written to only support GVim, and don't work at all in terminal Vim.
"
" This plugin makes GVim-only colorschemes Just Work in terminal Vim, as long
" as the terminal supports 88 or 256 colors - and most do these days. This
" usually requires no user interaction (but see below for what to do if things
" don't Just Work). After getting this plugin happily installed, any time you
" use :colorscheme it will do its magic and make the colorscheme Just Work.
"
" Whenever you change colorschemes using the :colorscheme command this script
" will be executed. It will take the colors that the scheme specified for use
" in the GUI and use an approximation algorithm to try to gracefully degrade
" them to the closest color available in your terminal. If you are running in
" a GUI or if your terminal doesn't support 88 or 256 colors, no changes are
" made. Also, no changes will be made if the colorscheme seems to have been
" high color already.
"
" License:
" Copyright (c) 2012, Matthew J. Wozniski
" All rights reserved.
"
" Redistribution and use in source and binary forms, with or without
" modification, are permitted provided that the following conditions are met:
" * Redistributions of source code must retain the above copyright
" notice, this list of conditions and the following disclaimer.
" * Redistributions in binary form must reproduce the above copyright
" notice, this list of conditions and the following disclaimer in the
" documentation and/or other materials provided with the distribution.
" * The names of the contributors may not be used to endorse or promote
" products derived from this software without specific prior written
" permission.
"
" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY
" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
" ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
" SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
" {>1} Basic plugin setup
" {>2} Check preconditions
" Quit if the user doesn't want or need us or is missing the gui feature. We
" need +gui to be able to check the gui color settings; vim doesn't bother to
" store them if it is not built with +gui.
if exists('g:CSApprox_loaded')
finish
elseif !has('gui') && v:version < 703
" Vim versions less than < 7.3.0 need +gui.
" Warn unless the user set g:CSApprox_verbose_level to zero.
if get(g:, 'CSApprox_verbose_level', 1)
echomsg "CSApprox needs gui support - not loading."
echomsg " See :help |csapprox-+gui| for possible workarounds."
endif
finish
endif
" {1} Mark us as loaded, and disable all compatibility options for now.
let g:CSApprox_loaded = 1
let s:savecpo = &cpo
set cpo&vim
" {>1} Collect info for the set highlights
" {>2} Determine if synIDattr is usable
" synIDattr() couldn't support 'guisp' until 7.2.052. This function returns
" true if :redir is needed to find the 'guisp' attribute, false if synIDattr()
" is functional. This test can be overridden by setting the global variable
" g:CSApprox_redirfallback to 1 (to force use of :redir) or to 0 (to force use
" of synIDattr()).
function! s:NeedRedirFallback()
if !exists("g:CSApprox_redirfallback")
let g:CSApprox_redirfallback = (v:version == 702 && !has('patch52'))
\ || v:version < 702
endif
return g:CSApprox_redirfallback
endfunction
" {>2} Collect and store the highlights
" Get a dictionary containing information for every highlight group not merely
" linked to another group. Return value is a dictionary, with highlight group
" numbers for keys and values that are dictionaries with four keys each,
" 'name', 'term', 'cterm', and 'gui'. 'name' holds the group name, and each
" of the others holds highlight information for that particular mode.
function! s:Highlights(modes)
let rv = {}
let i = 0
while 1
let i += 1
" Only interested in groups that exist and aren't linked
if synIDtrans(i) == 0
break
endif
" Handle vim bug allowing groups with name == "" to be created
if synIDtrans(i) != i || len(synIDattr(i, "name")) == 0
continue
endif
let rv[i] = {}
let rv[i].name = synIDattr(i, "name")
for where in a:modes
let rv[i][where] = {}
for attr in s:PossibleAttributes()
let rv[i][where][attr] = synIDattr(i, attr, where)
endfor
for attr in [ "fg", "bg" ]
let rv[i][where][attr] = synIDattr(i, attr.'#', where)
endfor
if where == "gui"
let rv[i][where]["sp"] = s:SynGuiSp(i, rv[i].name)
else
let rv[i][where]["sp"] = -1
endif
for attr in [ "fg", "bg", "sp" ]
if rv[i][where][attr] == -1
let rv[i][where][attr] = ''
endif
endfor
endfor
endwhile
return rv
endfunction
" {>2} Retrieve guisp
" Get guisp using whichever method is specified by _redir_fallback
function! s:SynGuiSp(idx, name)
if !s:NeedRedirFallback()
return s:SynGuiSpAttr(a:idx)
else
return s:SynGuiSpRedir(a:name)
endif
endfunction
" {>3} Implementation for retrieving guisp with redir hack
function! s:SynGuiSpRedir(name)
redir => temp
exe 'sil hi ' . a:name
redir END
let temp = matchstr(temp, 'guisp=\zs.*')
if len(temp) == 0 || temp[0] =~ '\s'
let temp = ""
else
" Make sure we can handle guisp='dark red'
let temp = substitute(temp, '[\x00].*', '', '')
let temp = substitute(temp, '\s*\(c\=term\|gui\).*', '', '')
let temp = substitute(temp, '\s*$', '', '')
endif
return temp
endfunction
" {>3} Implementation for retrieving guisp with synIDattr()
function! s:SynGuiSpAttr(idx)
return synIDattr(a:idx, 'sp#', 'gui')
endfunction
" {>1} Handle color names
" Place to store rgb.txt name to color mappings - lazy loaded if needed
let s:rgb = {}
" {>2} Builtin gui color names
" gui_x11.c and gui_gtk_x11.c have some default colors names that are searched
" if the x server doesn't know about a color. If 'showrgb' is available,
" we'll default to using these color names and values, and overwrite them with
" other values if 'showrgb' tells us about those colors.
let s:rgb_defaults = { "lightred" : "#FFBBBB",
\ "lightgreen" : "#88FF88",
\ "lightmagenta" : "#FFBBFF",
\ "darkcyan" : "#008888",
\ "darkblue" : "#0000BB",
\ "darkred" : "#BB0000",
\ "darkmagenta" : "#BB00BB",
\ "darkgrey" : "#BBBBBB",
\ "darkyellow" : "#BBBB00",
\ "gray10" : "#1A1A1A",
\ "grey10" : "#1A1A1A",
\ "gray20" : "#333333",
\ "grey20" : "#333333",
\ "gray30" : "#4D4D4D",
\ "grey30" : "#4D4D4D",
\ "gray40" : "#666666",
\ "grey40" : "#666666",
\ "gray50" : "#7F7F7F",
\ "grey50" : "#7F7F7F",
\ "gray60" : "#999999",
\ "grey60" : "#999999",
\ "gray70" : "#B3B3B3",
\ "grey70" : "#B3B3B3",
\ "gray80" : "#CCCCCC",
\ "grey80" : "#CCCCCC",
\ "gray90" : "#E5E5E5",
\ "grey90" : "#E5E5E5" }
" {>2} Colors that vim will use by name in one of the default schemes, either
" for bg=light or for bg=dark. This lets us avoid loading the entire rgb.txt
" database when the scheme itself doesn't ask for colors by name.
let s:rgb_presets = { "black" : "#000000",
\ "blue" : "#0000ff",
\ "brown" : "#a52a2a",
\ "cyan" : "#00ffff",
\ "darkblue" : "#00008b",
\ "darkcyan" : "#008b8b",
\ "darkgrey" : "#a9a9a9",
\ "darkmagenta" : "#8b008b",
\ "green" : "#00ff00",
\ "grey" : "#bebebe",
\ "grey40" : "#666666",
\ "grey90" : "#e5e5e5",
\ "lightblue" : "#add8e6",
\ "lightcyan" : "#e0ffff",
\ "lightgrey" : "#d3d3d3",
\ "lightmagenta" : "#ffbbff",
\ "magenta" : "#ff00ff",
\ "red" : "#ff0000",
\ "seagreen" : "#2e8b57",
\ "white" : "#ffffff",
\ "yellow" : "#ffff00" }
" {>2} Find available color names
" Find the valid named colors. By default, use our own rgb list, but try to
" retrieve the system's list if g:CSApprox_use_showrgb is set to true. Store
" the color names and color values to the dictionary s:rgb - the keys are
" color names (in lowercase), the values are strings representing color values
" (as '#rrggbb').
function! s:UpdateRgbHash()
try
if !exists("g:CSApprox_use_showrgb") || !g:CSApprox_use_showrgb
throw "Not using showrgb"
endif
" We want to use the 'showrgb' program, if it's around
let lines = split(system('showrgb'), '\n')
if v:shell_error || !exists('lines') || empty(lines)
throw "'showrgb' didn't give us an rgb.txt"
endif
let s:rgb = copy(s:rgb_defaults)
" fmt is (blanks?)(red)(blanks)(green)(blanks)(blue)(blanks)(name)
let parsepat = '^\s*\(\d\+\)\s\+\(\d\+\)\s\+\(\d\+\)\s\+\(.*\)$'
for line in lines
let v = matchlist(line, parsepat)
if len(v) < 0
throw "CSApprox: Bad RGB line: " . string(line)
endif
let s:rgb[tolower(v[4])] = printf("#%02x%02x%02x", v[1], v[2], v[3])
endfor
catch
try
let s:rgb = csapprox#rgb()
catch
echohl ErrorMsg
echomsg "Can't call rgb() from autoload/csapprox.vim"
echomsg "Named colors will not be available!"
echohl None
endtry
endtry
return 0
endfunction
" {>1} Derive and set cterm attributes
" {>2} List of all possible attributes
function! s:PossibleAttributes()
return [ "bold", "italic", "reverse", "underline", "undercurl" ]
endfunction
" {>2} Attribute overrides
" Allow the user to override a specified attribute with another attribute.
" For example, the default is to map 'italic' to 'underline' (since many
" terminals cannot display italic text, and gvim itself will replace italics
" with underlines where italicizing is impossible), and to replace 'sp' with
" 'fg' (since terminals can't use one color for the underline and another for
" the foreground, we color the entire word). This default can of course be
" overridden by the user, by setting g:CSApprox_attr_map. This map must be
" a dictionary of string keys, representing the same attributes that synIDattr
" can look up, to string values, representing the attribute mapped to or an
" empty string to disable the given attribute entirely.
function! s:attr_map(attr)
let rv = get(g:CSApprox_attr_map, a:attr, a:attr)
return rv
endfunction
function! s:NormalizeAttrMap(map)
let old = copy(a:map)
let new = filter(a:map, '0')
let valid_attrs = [ 'bg', 'fg', 'sp' ] + s:PossibleAttributes()
let colorattrs = [ 'fg', 'bg', 'sp' ]
for olhs in keys(old)
if olhs ==? 'inverse'
let nlhs = 'reverse'
endif
let orhs = old[olhs]
if orhs ==? 'inverse'
let nrhs = 'reverse'
endif
let nlhs = tolower(olhs)
let nrhs = tolower(orhs)
try
if index(valid_attrs, nlhs) == -1
echomsg "CSApprox: Bad attr map (removing unrecognized attribute " . olhs . ")"
elseif nrhs != '' && index(valid_attrs, nrhs) == -1
echomsg "CSApprox: Bad attr map (removing unrecognized attribute " . orhs . ")"
elseif nrhs != '' && !!(index(colorattrs, nlhs)+1) != !!(index(colorattrs, nrhs)+1)
echomsg "CSApprox: Bad attr map (removing " . olhs . "; type mismatch with " . orhs . ")"
elseif nrhs == 'sp'
echomsg "CSApprox: Bad attr map (removing " . olhs . "; can't map to 'sp')"
else
let new[nlhs] = nrhs
endif
catch
echo v:exception
endtry
endfor
endfunction
" {>2} Normalize the GUI settings of a highlight group
" If the Normal group is cleared, set it to gvim's default, black on white
" Though this would be a really weird thing for a scheme to do... *shrug*
function! s:FixupGuiInfo(highlights)
if a:highlights[s:hlid_normal].gui.bg == ''
let a:highlights[s:hlid_normal].gui.bg = 'white'
endif
if a:highlights[s:hlid_normal].gui.fg == ''
let a:highlights[s:hlid_normal].gui.fg = 'black'
endif
endfunction
" {>2} Map gui settings to cterm settings
" Given information about a highlight group, replace the cterm settings with
" the mapped gui settings, applying any attribute overrides along the way. In
" particular, this gives special treatment to the 'reverse' attribute and the
" 'guisp' attribute. In particular, if the 'reverse' attribute is set for
" gvim, we unset it for the terminal and instead set ctermfg to match guibg
" and vice versa, since terminals can consider a 'reverse' flag to mean using
" default-bg-on-default-fg instead of current-bg-on-current-fg. We also
" ensure that the 'sp' attribute is never set for cterm, since no terminal can
" handle that particular highlight. If the user wants to display the guisp
" color, he should map it to either 'fg' or 'bg' using g:CSApprox_attr_map.
function! s:FixupCtermInfo(highlights)
for hl in values(a:highlights)
if !has_key(hl, 'cterm')
let hl["cterm"] = {}
endif
" Find attributes to be set in the terminal
for attr in s:PossibleAttributes()
let hl.cterm[attr] = ''
if hl.gui[attr] == 1
if s:attr_map(attr) != ''
let hl.cterm[ s:attr_map(attr) ] = 1
endif
endif
endfor
for color in [ "bg", "fg" ]
let eff_color = color
if hl.cterm['reverse']
let eff_color = (color == 'bg' ? 'fg' : 'bg')
endif
let hl.cterm[color] = get(hl.gui, s:attr_map(eff_color), '')
endfor
if hl.gui['sp'] != '' && s:attr_map('sp') != ''
let hl.cterm[s:attr_map('sp')] = hl.gui['sp']
endif
if exists("g:CSApprox_fake_reverse") && g:CSApprox_fake_reverse
if hl.cterm['reverse'] && hl.cterm.bg == ''
let hl.cterm.bg = 'fg'
endif
if hl.cterm['reverse'] && hl.cterm.fg == ''
let hl.cterm.fg = 'bg'
endif
if hl.cterm['reverse']
let hl.cterm.reverse = ''
endif
endif
endfor
endfunction
" {>2} Kludge around inability to reference autoload functions
function! s:DefaultApproximator(...)
return call('csapprox#per_component#Approximate', a:000)
endfunction
" {>2} Set cterm colors for a highlight group
" Given the information for a single highlight group (ie, the value of
" one of the items in s:Highlights() already normalized with s:FixupCtermInfo
" and s:FixupGuiInfo), handle matching the gvim colors to the closest cterm
" colors by calling the appropriate approximator as specified with the
" g:CSApprox_approximator_function variable and set the colors and attributes
" appropriately to match the gui.
function! s:SetCtermFromGui(hl)
let hl = a:hl
" Set up the default approximator function, if needed
if !exists("g:CSApprox_approximator_function")
let g:CSApprox_approximator_function = function("s:DefaultApproximator")
endif
" Clear existing highlights
exe 'hi ' . hl.name . ' cterm=NONE ctermbg=NONE ctermfg=NONE'
for which in [ 'bg', 'fg' ]
let val = hl.cterm[which]
" Skip unset colors
if val == -1 || val == ""
continue
endif
" Try translating anything but 'fg', 'bg', #rrggbb, and rrggbb from an
" rgb.txt color to a #rrggbb color
if val !~? '^[fb]g$' && val !~ '^#\=\x\{6}$'
try
" First see if it is in our preset-by-vim rgb list
let val = s:rgb_presets[tolower(val)]
catch
" Then try loading and checking our real rgb list
if empty(s:rgb)
call s:UpdateRgbHash()
endif
try
let val = s:rgb[tolower(val)]
catch
" And then barf if we still haven't found it
if &verbose
echomsg "CSApprox: Colorscheme uses unknown color \"" . val . "\""
endif
continue
endtry
endtry
endif
if val =~? '^[fb]g$'
exe 'hi ' . hl.name . ' cterm' . which . '=' . val
let hl.cterm[which] = val
elseif val =~ '^#\=\x\{6}$'
let val = substitute(val, '^#', '', '')
let r = str2nr(val[0:1], 16)
let g = str2nr(val[2:3], 16)
let b = str2nr(val[4:5], 16)
let hl.cterm[which] = g:CSApprox_approximator_function(r, g, b)
exe 'hi ' . hl.name . ' cterm' . which . '=' . hl.cterm[which]
else
throw "Internal error handling color: " . val
endif
endfor
" Finally, set the attributes
let attrs = s:PossibleAttributes()
call filter(attrs, 'hl.cterm[v:val] == 1')
if !empty(attrs)
exe 'hi ' . hl.name . ' cterm=' . join(attrs, ',')
endif
endfunction
" {>1} Top-level control
" Cache the highlight ID of the normal group; it's used often and won't change
let s:hlid_normal = hlID('Normal')
" {>2} Builtin cterm color names above 15
" Vim defines some color name to high color mappings internally (see
" syntax.c:do_highlight). Since we don't want to overwrite a colorscheme that
" was actually written for a high color terminal with our choices, but have no
" way to tell if a colorscheme was written for a high color terminal, we fall
" back on guessing. If any highlight group has a cterm color set to 16 or
" higher, we assume that the user has used a high color colorscheme - unless
" that color is one of the below, which vim can set internally when a color is
" requested by name.
let s:presets_88 = []
let s:presets_88 += [32] " Brown
let s:presets_88 += [72] " DarkYellow
let s:presets_88 += [84] " Gray
let s:presets_88 += [84] " Grey
let s:presets_88 += [82] " DarkGray
let s:presets_88 += [82] " DarkGrey
let s:presets_88 += [43] " LightBlue
let s:presets_88 += [61] " LightGreen
let s:presets_88 += [63] " LightCyan
let s:presets_88 += [74] " LightRed
let s:presets_88 += [75] " LightMagenta
let s:presets_88 += [78] " LightYellow
let s:presets_256 = []
let s:presets_256 += [130] " Brown
let s:presets_256 += [130] " DarkYellow
let s:presets_256 += [248] " Gray
let s:presets_256 += [248] " Grey
let s:presets_256 += [242] " DarkGray
let s:presets_256 += [242] " DarkGrey
let s:presets_256 += [ 81] " LightBlue
let s:presets_256 += [121] " LightGreen
let s:presets_256 += [159] " LightCyan
let s:presets_256 += [224] " LightRed
let s:presets_256 += [225] " LightMagenta
let s:presets_256 += [229] " LightYellow
" {>2} Wrapper around :exe to allow :executing multiple commands.
" "cmd" is the command to be :executed.
" If the variable is a String, it is :executed.
" If the variable is a List, each element is :executed.
function! s:exe(cmd)
if type(a:cmd) == type('')
exe a:cmd
else
for cmd in a:cmd
call s:exe(cmd)
endfor
endif
endfunction
" {>2} Function to handle hooks
" Prototype: HandleHooks(type [, scheme])
" "type" is the type of hook to be executed, ie. "pre" or "post"
" "scheme" is the name of the colorscheme that is currently active, if known
"
" If the variables g:CSApprox_hook_{type} and g:CSApprox_hook_{scheme}_{type}
" exist, this will :execute them in that order. If one does not exist, it
" will silently be ignored.
"
" If the scheme name contains characters that are invalid in a variable name,
" they will simply be removed. Ie, g:colors_name = "123 foo_bar-baz456"
" becomes "foo_barbaz456"
"
" NOTE: Exceptions will be printed out, rather than end processing early. The
" rationale is that it is worse for the user to fix the hook in an editor with
" broken colors. :)
function! s:HandleHooks(type, ...)
let type = a:type
let scheme = (a:0 == 1 ? a:1 : "")
let scheme = substitute(scheme, '[^[:alnum:]_]', '', 'g')
let scheme = substitute(scheme, '^\d\+', '', '')
for cmd in [ 'g:CSApprox_hook_' . type,
\ 'g:CSApprox_' . scheme . '_hook_' . type,
\ 'g:CSApprox_hook_' . scheme . '_' . type ]
if exists(cmd)
try
call s:exe(eval(cmd))
catch
echomsg "Error processing " . cmd . ":"
echomsg v:exception
endtry
endif
endfor
endfunction
" {>2} Main function
" Wrapper around the actual implementation to make it easier to ensure that
" all temporary settings are restored by the time we return, whether or not
" something was thrown. Additionally, sets the 'verbose' option to the max of
" g:CSApprox_verbose_level (default 1) and &verbose for the duration of the
" main function. This allows us to default to a message whenever any error,
" even a recoverable one, occurs, meaning the user quickly finds out when
" something's wrong, but makes it very easy for the user to make us silent.
function! s:CSApprox(...)
try
if a:0 == 1 && a:1
if !exists('s:inhibit_hicolor_test')
let s:inhibit_hicolor_test = 0
endif
let s:inhibit_hicolor_test += 1
endif
let savelz = &lz
set lz
if exists("g:CSApprox_attr_map") && type(g:CSApprox_attr_map) == type({})
call s:NormalizeAttrMap(g:CSApprox_attr_map)
else
let g:CSApprox_attr_map = { 'italic' : 'underline', 'sp' : 'fg' }
endif
" colors_name must be unset and reset, or vim will helpfully reload the
" colorscheme when we set the background for the Normal group.
" See the help entries ':hi-normal-cterm' and 'g:colors_name'
if exists("g:colors_name")
let colors_name = g:colors_name
unlet g:colors_name
endif
" Similarly, the global variable "syntax_cmd" must be set to something vim
" doesn't recognize, lest vim helpfully switch all colors back to the
" default whenever the Normal group is changed (in syncolor.vim)...
if exists("g:syntax_cmd")
let syntax_cmd = g:syntax_cmd
endif
let g:syntax_cmd = "PLEASE DON'T CHANGE ANY COLORS!!!"
" Set up our verbosity level, if needed.
" Default to 1, so the user can know if something's wrong.
if !exists("g:CSApprox_verbose_level")
let g:CSApprox_verbose_level = 1
endif
call s:HandleHooks("pre", (exists("colors_name") ? colors_name : ""))
let old_bg = &bg
" Set 'verbose' set to the maximum of &verbose and CSApprox_verbose_level
exe max([&vbs, g:CSApprox_verbose_level]) 'verbose call s:CSApproxImpl()'
let &bg = old_bg
call s:HandleHooks("post", (exists("colors_name") ? colors_name : ""))
finally
if exists("colors_name")
let g:colors_name = colors_name
endif
unlet g:syntax_cmd
if exists("syntax_cmd")
let g:syntax_cmd = syntax_cmd
endif
let &lz = savelz
if a:0 == 1 && a:1
let s:inhibit_hicolor_test -= 1
if s:inhibit_hicolor_test == 0
unlet s:inhibit_hicolor_test
endif
endif
endtry
endfunction
" {>2} CSApprox implementation
" Verifies that the user has not started the gui, and that vim recognizes his
" terminal as having enough colors for us to go on, then gathers the existing
" highlights and sets the cterm colors to match the gui colors for all those
" highlights (unless the colorscheme was already high-color).
function! s:CSApproxImpl()
" Return if not running in an 88/256 color terminal
if &t_Co != 256 && &t_Co != 88
if &verbose && &t_Co != ''
echomsg "CSApprox skipped; terminal only has" &t_Co "colors, not 88/256"
echomsg "Try checking :help csapprox-terminal for workarounds"
endif
return
endif
" Get the current highlight colors
let highlights = s:Highlights(["gui"])
let hinums = keys(highlights)
" Make sure that the script is not already 256 color by checking to make
" sure that no groups are set to a value above 256, unless the color they're
" set to can be set internally by vim (gotten by scraping
" color_numbers_{88,256} in syntax.c:do_highlight)
"
" XXX: s:inhibit_hicolor_test allows this test to be skipped for snapshots
if !exists("s:inhibit_hicolor_test") || !s:inhibit_hicolor_test
for hlid in hinums
for type in [ 'bg', 'fg' ]
let color = synIDattr(hlid, type, 'cterm')
if color > 15 && index(s:presets_{&t_Co}, str2nr(color)) < 0
" The value is set above 15, and wasn't set by vim.
if &verbose >= 2
echomsg 'CSApprox: Exiting - high' type 'color found for' highlights[hlid].name
endif
return
endif
endfor
endfor
endif
call s:FixupGuiInfo(highlights)
call s:FixupCtermInfo(highlights)
" We need to set the Normal group first so 'bg' and 'fg' work as colors
call insert(hinums, remove(hinums, index(hinums, string(s:hlid_normal))))
" then set each color's cterm attributes to match gui
for hlid in hinums
call s:SetCtermFromGui(highlights[hlid])
endfor
endfunction
" {>2} Write out the current colors to an 88/256 color colorscheme file.
" "file" - destination filename
" "overwrite" - overwrite an existing file
function! s:CSApproxSnapshot(file, overwrite)
let force = a:overwrite
let file = fnamemodify(a:file, ":p")
if empty(file)
throw "Bad file name: \"" . file . "\""
elseif (filewritable(fnamemodify(file, ':h')) != 2)
throw "Cannot write to directory \"" . fnamemodify(file, ':h') . "\""
elseif (glob(file) || filereadable(file)) && !force
" TODO - respect 'confirm' here and prompt if it's set.
echohl ErrorMsg
echomsg "E13: File exists (add ! to override)"
echohl None
return
endif
" Sigh... This is basically a bug, but one that I have no chance of fixing.
" Vim decides that Pmenu should be highlighted in 'LightMagenta' in terminal
" vim and as 'Magenta' in gvim... And I can't ask it what color it actually
" *wants*. As far as I can see, there's no way for me to learn that
" I should output 'Magenta' when 'LightMagenta' is provided by vim for the
" terminal.
if !has('gui_running')
echohl WarningMsg
echomsg "Warning: The written colorscheme may have incorrect colors"
echomsg " when CSApproxSnapshot is used in terminal vim!"
echohl None
endif
let save_t_Co = &t_Co
let s:inhibit_hicolor_test = 1
if exists("g:CSApprox_konsole")
let save_CSApprox_konsole = g:CSApprox_konsole
endif
if exists("g:CSApprox_eterm")
let save_CSApprox_eterm = g:CSApprox_eterm
endif
" Needed just like in CSApprox()
if exists("g:colors_name")
let colors_name = g:colors_name
unlet g:colors_name
endif
" Needed just like in CSApprox()
if exists("g:syntax_cmd")
let syntax_cmd = g:syntax_cmd
endif
let g:syntax_cmd = "PLEASE DON'T CHANGE ANY COLORS!!!"
try
let lines = []
let lines += [ '" This scheme was created by CSApproxSnapshot' ]
let lines += [ '" on ' . strftime("%a, %d %b %Y") ]
let lines += [ '' ]
let lines += [ 'hi clear' ]
let lines += [ 'if exists("syntax_on")' ]
let lines += [ ' syntax reset' ]
let lines += [ 'endif' ]
let lines += [ '' ]
let lines += [ 'if v:version < 700' ]
let lines += [ ' let g:colors_name = expand("<sfile>:t:r")' ]
let lines += [ ' command! -nargs=+ CSAHi exe "hi" substitute(substitute(<q-args>, "undercurl", "underline", "g"), "guisp\\S\\+", "", "g")' ]
let lines += [ 'else' ]
let lines += [ ' let g:colors_name = expand("<sfile>:t:r")' ]
let lines += [ ' command! -nargs=+ CSAHi exe "hi" <q-args>' ]
let lines += [ 'endif' ]
let lines += [ '' ]
let lines += [ 'function! s:old_kde()' ]
let lines += [ ' " Konsole only used its own palette up til KDE 4.2.0' ]
let lines += [ " if executable('kde4-config') && system('kde4-config --kde-version') =~ '^4\.[10]\.'" ]
let lines += [ ' return 1' ]
let lines += [ " elseif executable('kde-config') && system('kde-config --version') =~# 'KDE: 3\.'" ]
let lines += [ ' return 1' ]
let lines += [ ' else' ]
let lines += [ ' return 0' ]
let lines += [ ' endif' ]
let lines += [ 'endfunction' ]
let lines += [ '' ]
let lines += [ 'if 0' ]
for round in [ 'konsole', 'eterm', 'xterm', 'urxvt' ]
sil! unlet g:CSApprox_eterm
sil! unlet g:CSApprox_konsole
if round == 'konsole'
let g:CSApprox_konsole = 1
elseif round == 'eterm'
let g:CSApprox_eterm = 1
endif
if round == 'urxvt'
set t_Co=88
else
set t_Co=256
endif
call s:CSApprox()
let highlights = s:Highlights(["term", "cterm", "gui"])
call s:FixupGuiInfo(highlights)
if round == 'konsole' || round == 'eterm'
if round == 'konsole'
let term_matches_round = '(&term =~? "^konsole" && s:old_kde())'
else
let term_matches_round = '&term =~? "^' . round . '"'
endif
let lines += [ 'elseif has("gui_running") || (&t_Co == ' . &t_Co
\ . ' && (&term ==# "xterm" || &term =~# "^screen")'
\ . ' && exists("g:CSApprox_' . round . '")'
\ . ' && g:CSApprox_' . round . ')'
\ . ' || ' . term_matches_round ]
else
let lines += [ 'elseif has("gui_running") || &t_Co == ' . &t_Co ]
endif
let hinums = keys(highlights)
call insert(hinums, remove(hinums, index(hinums, string(s:hlid_normal))))
for hlnum in hinums
let hl = highlights[hlnum]
let line = ' CSAHi ' . hl.name
for type in [ 'term', 'cterm', 'gui' ]
let attrs = s:PossibleAttributes()
call filter(attrs, 'hl[type][v:val] == 1')
let line .= ' ' . type . '=' . (empty(attrs) ? 'NONE' : join(attrs, ','))
if type != 'term'
let line .= ' ' . type . 'bg=' . (len(hl[type].bg) ? hl[type].bg : 'bg')
let line .= ' ' . type . 'fg=' . (len(hl[type].fg) ? hl[type].fg : 'fg')
if type == 'gui' && hl.gui.sp !~ '^\s*$'
let line .= ' ' . type . 'sp=' . hl[type].sp
endif
endif
endfor
let lines += [ line ]
endfor
endfor
let lines += [ 'endif' ]
let lines += [ '' ]
let lines += [ 'if 1' ]
let lines += [ ' delcommand CSAHi' ]
let lines += [ 'endif' ]
call writefile(lines, file)
finally
let &t_Co = save_t_Co
if exists("save_CSApprox_konsole")
let g:CSApprox_konsole = save_CSApprox_konsole
endif
if exists("save_CSApprox_eterm")
let g:CSApprox_eterm = save_CSApprox_eterm
endif
if exists("colors_name")
let g:colors_name = colors_name
endif
unlet g:syntax_cmd
if exists("syntax_cmd")
let g:syntax_cmd = syntax_cmd
endif
call s:CSApprox()
unlet s:inhibit_hicolor_test
endtry
endfunction
" {>2} Snapshot user command
command! -bang -nargs=1 -complete=file -bar CSApproxSnapshot
\ call s:CSApproxSnapshot(<f-args>, strlen("<bang>"))
" {>2} Manual updates
command -bang -bar CSApprox call s:CSApprox(strlen("<bang>"))
" {>1} Autocmds
" Set up an autogroup to hook us on the completion of any :colorscheme command
augroup CSApprox
au!
au ColorScheme * call s:CSApprox()
"au User CSApproxPost highlight Normal ctermbg=none | highlight NonText ctermbg=None
augroup END
" {>1} Restore compatibility options
let &cpo = s:savecpo
unlet s:savecpo
" {0} vim:sw=2:sts=2:et:fdm=expr:fde=substitute(matchstr(getline(v\:lnum),'^\\s*"\\s*{\\zs.\\{-}\\ze}'),'^$','=','')
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