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Diffstat (limited to 'fontconfig.lua')
| -rw-r--r-- | fontconfig.lua | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/fontconfig.lua b/fontconfig.lua new file mode 100644 index 0000000..3ef3de9 --- /dev/null +++ b/fontconfig.lua @@ -0,0 +1,57 @@ +-- mod-version:1 -- lite-xl 1.16 +local subprocess = require "process" + +local core = require "core" +local style = require "core.style" +local config = require "core.config" + +--[[ + Example config (put it in user module): + ``` + local fc = require "plugins.fontconfig" + fc( + { name = "sans", size = 13 * SCALE }, -- UI font + { name = "monospace", size = 13 * SCALE } -- code font + ) + ``` +]] + +local function resolve_font(spec) + local scan_rate = 1 / config.fps + local proc = subprocess.start({ "fc-match", "-s", "-f", "%{file}\n", spec }, { + stdin = subprocess.REDIRECT_DISCARD, + stdout = subprocess.REDIRECT_PIPE, + stderr = subprocess.REDIRECT_STDOUT + }) + local prev, lines = {}, {} + while proc:running() do + coroutine.yield(scan_rate) + local buf = proc:read_stdout() + local p, _, n = string.match(buf, "(.+)\n(.+)") + if p then + prev[#prev + 1] = p + lines[#lines + 1] = table.concat(prev, "") + prev = { n } + else + prev[#prev + 1] = buf + end + end + table.insert(lines, table.concat(prev, "")) + + if proc:returncode() ~= 0 or #lines < 1 then + error(string.format("Cannot find a font matching the given specs: %q", spec), 0) + end + -- maybe in the future we can detect and do glyph substitution here... + return lines[1] +end + +local function load_system_fonts(font, code_font) + core.add_thread(function() + local font_file = resolve_font(font.name) + local code_font_file = resolve_font(code_font.name) + style.font = renderer.font.load(font_file, font.size, font) + style.code_font = renderer.font.load(code_font_file, code_font.size, code_font) + end) +end + +return load_system_fonts
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