diff options
Diffstat (limited to 'vis.lua')
| -rw-r--r-- | vis.lua | 61 |
1 files changed, 61 insertions, 0 deletions
@@ -222,3 +222,64 @@ vis.events.theme_change = function(name) end end +vis.events.win_syntax = function(win, name) + if name == nil then + return true + end + local lexers = vis.lexers + if lexers == nil then + return false + end + local lexer = lexers.load(name) + if not lexer then + return false + end + + win:style_define(win.STYLE_DEFAULT, lexers.STYLE_DEFAULT) + win:style_define(win.STYLE_CURSOR, lexers.STYLE_CURSOR) + win:style_define(win.STYLE_CURSOR_PRIMARY, lexers.STYLE_CURSOR_PRIMARY) + win:style_define(win.STYLE_CURSOR_LINE, lexers.STYLE_CURSOR_LINE) + win:style_define(win.STYLE_SELECTION, lexers.STYLE_SELECTION) + win:style_define(win.STYLE_LINENUMBER, lexers.STYLE_LINENUMBER) + win:style_define(win.STYLE_COLOR_COLUMN, lexers.STYLE_COLOR_COLUMN) + + for token_name, id in pairs(lexer._TOKENSTYLES) do + local style = lexers['STYLE_'..string.upper(token_name)] or lexer._EXTRASTYLES[token_name] + win:style_define(id, style) + end + return true +end + +vis.events.win_highlight = function(win) + if win.syntax == nil or vis.lexers == nil then + return + end + local lexer = vis.lexers.load(win.syntax) + if lexer == nil then + return + end + + -- TODO: improve heuristic for initial style + local viewport = win.viewport + local horizon_max = 32768 + local horizon = viewport.start < horizon_max and viewport.start or horizon_max + local view_start = viewport.start + local lex_start = viewport.start - horizon + local token_start = lex_start + viewport.start = token_start + local data = win.file:content(viewport) + local token_styles = lexer._TOKENSTYLES + local tokens = lexer:lex(data, 1) + + for i = 1, #tokens, 2 do + local token_end = lex_start + tokens[i+1] - 1 + if token_end >= view_start then + local name = tokens[i] + local style = token_styles[name] + if style ~= nil then + win:style(style, token_start, token_end) + end + end + token_start = token_end + end +end |