diff options
Diffstat (limited to 'runtime/lua/vim/_defaults.lua')
| -rw-r--r-- | runtime/lua/vim/_defaults.lua | 255 |
1 files changed, 180 insertions, 75 deletions
diff --git a/runtime/lua/vim/_defaults.lua b/runtime/lua/vim/_defaults.lua index c3bb36fc36..b73681be04 100644 --- a/runtime/lua/vim/_defaults.lua +++ b/runtime/lua/vim/_defaults.lua @@ -165,91 +165,92 @@ do }) end ---- Guess value of 'background' based on terminal color. ---- ---- We write Operating System Command (OSC) 11 to the terminal to request the ---- terminal's background color. We then wait for a response. If the response ---- matches `rgba:RRRR/GGGG/BBBB/AAAA` where R, G, B, and A are hex digits, then ---- compute the luminance[1] of the RGB color and classify it as light/dark ---- accordingly. Note that the color components may have anywhere from one to ---- four hex digits, and require scaling accordingly as values out of 4, 8, 12, ---- or 16 bits. Also note the A(lpha) component is optional, and is parsed but ---- ignored in the calculations. ---- ---- [1] https://en.wikipedia.org/wiki/Luma_%28video%29 -do - --- Parse a string of hex characters as a color. - --- - --- The string can contain 1 to 4 hex characters. The returned value is - --- between 0.0 and 1.0 (inclusive) representing the intensity of the color. - --- - --- For instance, if only a single hex char "a" is used, then this function - --- returns 0.625 (10 / 16), while a value of "aa" would return 0.664 (170 / - --- 256). - --- - --- @param c string Color as a string of hex chars - --- @return number? Intensity of the color - local function parsecolor(c) - if #c == 0 or #c > 4 then - return nil - end - - local val = tonumber(c, 16) - if not val then - return nil - end - - local max = tonumber(string.rep('f', #c), 16) - return val / max +-- Only do the following when the TUI is attached +local tty = nil +for _, ui in ipairs(vim.api.nvim_list_uis()) do + if ui.chan == 1 and ui.stdout_tty then + tty = ui + break end +end - --- Parse an OSC 11 response - --- - --- Either of the two formats below are accepted: - --- - --- OSC 11 ; rgb:<red>/<green>/<blue> - --- - --- or - --- - --- OSC 11 ; rgba:<red>/<green>/<blue>/<alpha> +if tty then + --- Guess value of 'background' based on terminal color. --- - --- where + --- We write Operating System Command (OSC) 11 to the terminal to request the + --- terminal's background color. We then wait for a response. If the response + --- matches `rgba:RRRR/GGGG/BBBB/AAAA` where R, G, B, and A are hex digits, then + --- compute the luminance[1] of the RGB color and classify it as light/dark + --- accordingly. Note that the color components may have anywhere from one to + --- four hex digits, and require scaling accordingly as values out of 4, 8, 12, + --- or 16 bits. Also note the A(lpha) component is optional, and is parsed but + --- ignored in the calculations. --- - --- <red>, <green>, <blue>, <alpha> := h | hh | hhh | hhhh - --- - --- The alpha component is ignored, if present. - --- - --- @param resp string OSC 11 response - --- @return string? Red component - --- @return string? Green component - --- @return string? Blue component - local function parseosc11(resp) - local r, g, b - r, g, b = resp:match('^\027%]11;rgb:(%x+)/(%x+)/(%x+)$') - if not r and not g and not b then - local a - r, g, b, a = resp:match('^\027%]11;rgba:(%x+)/(%x+)/(%x+)/(%x+)$') - if not a or #a > 4 then - return nil, nil, nil + --- [1] https://en.wikipedia.org/wiki/Luma_%28video%29 + do + --- Parse a string of hex characters as a color. + --- + --- The string can contain 1 to 4 hex characters. The returned value is + --- between 0.0 and 1.0 (inclusive) representing the intensity of the color. + --- + --- For instance, if only a single hex char "a" is used, then this function + --- returns 0.625 (10 / 16), while a value of "aa" would return 0.664 (170 / + --- 256). + --- + --- @param c string Color as a string of hex chars + --- @return number? Intensity of the color + local function parsecolor(c) + if #c == 0 or #c > 4 then + return nil end - end - if r and g and b and #r <= 4 and #g <= 4 and #b <= 4 then - return r, g, b + local val = tonumber(c, 16) + if not val then + return nil + end + + local max = tonumber(string.rep('f', #c), 16) + return val / max end - return nil, nil, nil - end + --- Parse an OSC 11 response + --- + --- Either of the two formats below are accepted: + --- + --- OSC 11 ; rgb:<red>/<green>/<blue> + --- + --- or + --- + --- OSC 11 ; rgba:<red>/<green>/<blue>/<alpha> + --- + --- where + --- + --- <red>, <green>, <blue>, <alpha> := h | hh | hhh | hhhh + --- + --- The alpha component is ignored, if present. + --- + --- @param resp string OSC 11 response + --- @return string? Red component + --- @return string? Green component + --- @return string? Blue component + local function parseosc11(resp) + local r, g, b + r, g, b = resp:match('^\027%]11;rgb:(%x+)/(%x+)/(%x+)$') + if not r and not g and not b then + local a + r, g, b, a = resp:match('^\027%]11;rgba:(%x+)/(%x+)/(%x+)/(%x+)$') + if not a or #a > 4 then + return nil, nil, nil + end + end + + if r and g and b and #r <= 4 and #g <= 4 and #b <= 4 then + return r, g, b + end - local tty = false - for _, ui in ipairs(vim.api.nvim_list_uis()) do - if ui.chan == 1 and ui.stdout_tty then - tty = true - break + return nil, nil, nil end - end - if tty then local timer = assert(vim.uv.new_timer()) ---@param bg string New value of the 'background' option @@ -300,7 +301,7 @@ do io.stdout:write('\027]11;?\007') timer:start(1000, 0, function() - -- No response received. Delete the autocommand + -- Delete the autocommand if no response was received vim.schedule(function() -- Suppress error if autocommand has already been deleted pcall(vim.api.nvim_del_autocmd, id) @@ -311,4 +312,108 @@ do end end) end + + --- If the TUI (term_has_truecolor) was able to determine that the host + --- terminal supports truecolor, enable 'termguicolors'. Otherwise, query the + --- terminal (using both XTGETTCAP and SGR + DECRQSS). If the terminal's + --- response indicates that it does support truecolor enable 'termguicolors', + --- but only if the user has not already disabled it. + do + if tty.rgb then + -- The TUI was able to determine truecolor support + vim.o.termguicolors = true + else + --- Enable 'termguicolors', but only if it was not already set by the user. + local function settgc() + if not vim.api.nvim_get_option_info2('termguicolors', {}).was_set then + vim.o.termguicolors = true + end + end + + local caps = {} ---@type table<string, boolean> + require('vim.termcap').query({ 'Tc', 'RGB', 'setrgbf', 'setrgbb' }, function(cap, found) + if not found then + return + end + + caps[cap] = true + if caps.Tc or caps.RGB or (caps.setrgbf and caps.setrgbb) then + settgc() + end + end) + + local timer = assert(vim.uv.new_timer()) + + -- Arbitrary colors to set in the SGR sequence + local r = 1 + local g = 2 + local b = 3 + + local id = vim.api.nvim_create_autocmd('TermResponse', { + nested = true, + callback = function(args) + local resp = args.data ---@type string + local decrqss = resp:match('^\027P1%$r([%d;:]+)m$') + + if decrqss then + -- The DECRQSS SGR response first contains attributes separated by + -- semicolons, followed by the SGR itself with parameters separated + -- by colons. Some terminals include "0" in the attribute list + -- unconditionally; others do not. Our SGR sequence did not set any + -- attributes, so there should be no attributes in the list. + local attrs = vim.split(decrqss, ';') + if #attrs ~= 1 and (#attrs ~= 2 or attrs[1] ~= '0') then + return true + end + + -- The returned SGR sequence should begin with 48:2 + local sgr = attrs[#attrs]:match('^48:2:([%d:]+)$') + if not sgr then + return true + end + + -- The remaining elements of the SGR sequence should be the 3 colors + -- we set. Some terminals also include an additional parameter + -- (which can even be empty!), so handle those cases as well + local params = vim.split(sgr, ':') + if #params ~= 3 and (#params ~= 4 or (params[1] ~= '' and params[1] ~= '1')) then + return true + end + + if + tonumber(params[#params - 2]) == r + and tonumber(params[#params - 1]) == g + and tonumber(params[#params]) == b + then + settgc() + end + + return true + end + end, + }) + + -- Write SGR followed by DECRQSS. This sets the background color then + -- immediately asks the terminal what the background color is. If the + -- terminal responds to the DECRQSS with the same SGR sequence that we + -- sent then the terminal supports truecolor. + local decrqss = '\027P$qm\027\\' + if os.getenv('TMUX') then + decrqss = string.format('\027Ptmux;%s\027\\', decrqss:gsub('\027', '\027\027')) + end + io.stdout:write(string.format('\027[48;2;%d;%d;%dm%s', r, g, b, decrqss)) + + timer:start(1000, 0, function() + -- Delete the autocommand if no response was received + vim.schedule(function() + -- Suppress error if autocommand has already been deleted + pcall(vim.api.nvim_del_autocmd, id) + end) + + if not timer:is_closing() then + timer:close() + end + end) + end + end end |