diff options
Diffstat (limited to 'context/data/scite/lexers/scite-context-lexer.lua')
| -rw-r--r-- | context/data/scite/lexers/scite-context-lexer.lua | 215 |
1 files changed, 118 insertions, 97 deletions
diff --git a/context/data/scite/lexers/scite-context-lexer.lua b/context/data/scite/lexers/scite-context-lexer.lua index 13b8d77a8..8573d331c 100644 --- a/context/data/scite/lexers/scite-context-lexer.lua +++ b/context/data/scite/lexers/scite-context-lexer.lua @@ -321,128 +321,149 @@ setmetatable(n_table, { __index = function(t,level) local v = { level -- end -- line_num = line_num + 1 -- end --- --- -- not that much faster but less memory: - -local action_y, action_n -local newline = P("\r\n") + S("\r\n") -local splitlines = ( ( - (Cp() * Cs((1-newline)^1) * newline^-1) / function(p,l) action_y(p,l) end - + ( newline ) / function() action_n() end -) )^0 +local newline = P("\r\n") + S("\r\n") +local p_yes = Cp() * Cs((1-newline)^1) * newline^-1 +local p_nop = newline -function context.fold(text, start_pos, start_line, start_level) - if text == '' then +local function fold_by_parsing(text,start_pos,start_line,start_level,lexer) + local foldsymbols = lexer._foldsymbols + if not foldsymbols then return { } end - local lexer = global._LEXER - if lexer._fold then - return lexer._fold(text, start_pos, start_line, start_level) + local patterns = foldsymbols._patterns + if not patterns then + return { } + end + local nofpatterns = #patterns + if nofpatterns == 0 then + return { } end local folds = { } - if lexer._foldsymbols then - local fold_symbols = lexer._foldsymbols - local line_num = start_line - local prev_level = start_level - local current_level = prev_level - local patterns = fold_symbols._patterns - local nofpatterns = #patterns - local hash = fold_symbols._hash - if not hash then - hash = { } - for symbol, matches in next, fold_symbols do - if not find(symbol,"^_") then - for s, _ in next, matches do - hash[s] = true - end + local line_num = start_line + local prev_level = start_level + local current_level = prev_level + local validmatches = foldsymbols._validmatches + if not validmatches then + validmatches = { } + for symbol, matches in next, foldsymbols do -- whatever = { start = 1, stop = -1 } + if not find(symbol,"^_") then -- brrr + for s, _ in next, matches do + validmatches[s] = true end end - fold_symbols._hash = hash end - action_y = function(pos,line) -- we can consider moving this one outside the function - for i=1,nofpatterns do - for s, m in gmatch(line,patterns[i]) do - if hash[m] then - local symbols = fold_symbols[get_style_at(start_pos + pos + s - 1)] - if symbols then - local l = symbols[m] - if l then - local t = type(l) - if t == 'number' then - current_level = current_level + l - if current_level < FOLD_BASE then -- can this happen? - current_level = FOLD_BASE - end - elseif t == 'function' then - current_level = current_level + l(text, pos, line, s, match) - if current_level < FOLD_BASE then - current_level = FOLD_BASE - end - end + foldsymbols._validmatches = validmatches + end + local function action_y(pos,line) -- we can consider moving the local functions outside (drawback: folds is kept) + for i=1,nofpatterns do + for s, m in gmatch(line,patterns[i]) do + if validmatches[m] then + local symbols = foldsymbols[get_style_at(start_pos + pos + s - 1)] + if symbols then + local action = symbols[m] + if action then + if type(action) == 'number' then -- we could store this in validmatches if there was only one symbol category + current_level = current_level + action + else + current_level = current_level + action(text,pos,line,s,m) + end + if current_level < FOLD_BASE then + current_level = FOLD_BASE end end end end end - if current_level > prev_level then - folds[line_num] = h_table[prev_level] -- { prev_level, FOLD_HEADER } - else - folds[line_num] = n_table[prev_level] -- { prev_level } - end - prev_level = current_level - line_num = line_num + 1 end - action_n = function() -- we can consider moving this one outside the function - folds[line_num] = b_table[prev_level] -- { prev_level, FOLD_BLANK } - line_num = line_num + 1 + if current_level > prev_level then + folds[line_num] = h_table[prev_level] -- { prev_level, FOLD_HEADER } + else + folds[line_num] = n_table[prev_level] -- { prev_level } end - local lines = lpegmatch(splitlines,text) - elseif get_property('fold.by.indentation',1) == 1 then - local current_line = start_line - local prev_level = start_level - for _, line in gmatch(text,'([\t ]*)(.-)\r?\n') do - if line ~= "" then - local current_level = FOLD_BASE + get_indent_amount(current_line) - if current_level > prev_level then -- next level - local i = current_line - 1 - while true do - local f = folds[i] - if f and f[2] == FOLD_BLANK then - i = i - 1 - else - break - end - end + prev_level = current_level + line_num = line_num + 1 + end + local function action_n() + folds[line_num] = b_table[prev_level] -- { prev_level, FOLD_BLANK } + line_num = line_num + 1 + end + if lexer._reset_parser then + lexer._reset_parser() + end + local lpegpattern = (p_yes/action_y + p_nop/action_n)^0 -- not too efficient but indirect function calls are neither but + lpegmatch(lpegpattern,text) -- keys are not pressed that fast ... large files are slow anyway + return folds +end + +local function fold_by_indentation(text,start_pos,start_line,start_level) + local folds = { } + local current_line = start_line + local prev_level = start_level + for _, line in gmatch(text,'([\t ]*)(.-)\r?\n') do + if line ~= "" then + local current_level = FOLD_BASE + get_indent_amount(current_line) + if current_level > prev_level then -- next level + local i = current_line - 1 + while true do local f = folds[i] - if f then - f[2] = FOLD_HEADER - end -- low indent - folds[current_line] = n_table[current_level] -- { current_level } -- high indent - elseif current_level < prev_level then -- prev level - local f = folds[current_line - 1] - if f then - f[1] = prev_level -- high indent + if f and f[2] == FOLD_BLANK then + i = i - 1 + else + break end - folds[current_line] = n_table[current_level] -- { current_level } -- low indent - else -- same level - folds[current_line] = n_table[prev_level] -- { prev_level } end - prev_level = current_level - else - folds[current_line] = b_table[prev_level] -- { prev_level, FOLD_BLANK } + local f = folds[i] + if f then + f[2] = FOLD_HEADER + end -- low indent + folds[current_line] = n_table[current_level] -- { current_level } -- high indent + elseif current_level < prev_level then -- prev level + local f = folds[current_line - 1] + if f then + f[1] = prev_level -- high indent + end + folds[current_line] = n_table[current_level] -- { current_level } -- low indent + else -- same level + folds[current_line] = n_table[prev_level] -- { prev_level } end - current_line = current_line + 1 - end - else - for _ in gmatch(text,".-\r?\n") do - folds[start_line] = n_table[start_level] -- { start_level } - start_line = start_line + 1 + prev_level = current_level + else + folds[current_line] = b_table[prev_level] -- { prev_level, FOLD_BLANK } end + current_line = current_line + 1 + end + return folds +end + +local function fold_by_line(text,start_pos,start_line,start_level) + local folds = { } + for _ in gmatch(text,".-\r?\n") do + folds[start_line] = n_table[start_level] -- { start_level } + start_line = start_line + 1 end return folds end +function context.fold(text,start_pos,start_line,start_level) + if text == '' then + return { } + end + local lexer = global._LEXER + local fold_by_lexer = lexer._fold + if fold_by_lexer then + return fold_by_lexer(text,start_pos,start_line,start_level,lexer) + elseif get_property('fold.by.parsing',1) > 0 then + return fold_by_parsing(text,start_pos,start_line,start_level,lexer) + elseif get_property('fold.by.indentation',1) > 0 then -- not that usefull + return fold_by_indentation(text,start_pos,start_line,start_level,lexer) + elseif get_property('fold.by.line',1) > 0 then -- rather useless + return fold_by_line(text,start_pos,start_line,start_level,lexer) + else + return { } + end +end + function context.lex(text,init_style) local lexer = global._LEXER local grammar = lexer._GRAMMAR |