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csapprox/plugin/CSApprox.vim
Matt Wozniski 80b1bd5863 Kludge around inability to reference autoloads 
This was causing problems when running in Vim 7.0 or 7.1.  graywh
bisected down to the commit introducing it for me, (d2c906) making it
easy to spot the problem.
2009-11-07 11:46:48 -05:00

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" CSApprox: Make gvim-only colorschemes Just Work terminal vim
" Maintainer: Matthew Wozniski (mjw@drexel.edu)
" Date: Wed, 01 Apr 2009 22:10:19 -0400
" Version: 3.50
" 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) 2009, 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')
" 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 [ "bold", "italic", "reverse", "underline", "undercurl" ]
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} 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', 'bold', 'italic',
\ 'reverse', 'underline', 'undercurl' ]
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 [ "bold", "italic", "reverse", "underline", "undercurl" ]
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 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
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 = [ 'bold', 'italic', 'underline', 'undercurl' ]
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 : ""))
" Set 'verbose' set to the maximum of &verbose and CSApprox_verbose_level
exe max([&vbs, g:CSApprox_verbose_level]) 'verbose call s:CSApproxImpl()'
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 && !has('gui_running')
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 += [ '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'
let lines += [ 'elseif has("gui_running") || (&t_Co == ' . &t_Co
\ . ' && (&term ==# "xterm" || &term =~# "^screen")'
\ . ' && exists("g:CSApprox_' . round . '")'
\ . ' && g:CSApprox_' . round . ')'
\ . ' || &term =~? "^' . 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 = [ 'reverse', 'bold', 'italic', 'underline', 'undercurl' ]
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} Hooks
" {>2} 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
" {>2} Execute
" The last thing to do when sourced is to run and actually fix up the colors.
if !has('gui_running')
call s:CSApprox()
endif
" {>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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