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--
-- vis-commentary
--
-- comment strings and matching patterns are taken from:
-- https://github.com/rgieseke/textadept/blob/9906c1fcec1c33c6a83c33dc7874669b5c6113f8/modules/textadept/editing.lua
--
local comment_string = {
actionscript='//', ada='--', ansi_c='/*|*/', antlr='//', apdl='!', apl='#',
applescript='--', asp='\'', autoit=';', awk='#', b_lang='//', bash='#',
batch=':', bibtex='%', boo='#', chuck='//', cmake='#', coffeescript='#',
context='%', cpp='//', crystal='#', csharp='//', css='/*|*/', cuda='//',
dart='//', desktop='#', django='{#|#}', dmd='//', dockerfile='#', dot='//',
eiffel='--', elixir='#', erlang='%', faust='//', fish='#', forth='|\\',
fortran='!', fsharp='//', gap='#', gettext='#', gherkin='#', glsl='//',
gnuplot='#', go='//', groovy='//', gtkrc='#', haskell='--', html='<!--|-->',
icon='#', idl='//', inform='!', ini='#', Io='#', java='//', javascript='//',
json='/*|*/', jsp='//', latex='%', ledger='#', less='//', lilypond='%',
lisp=';', logtalk='%', lua='--', makefile='#', markdown='<!--|-->', matlab='#',
moonscript='--', myrddin='//', nemerle='//', nsis='#', objective_c='//',
pascal='//', perl='#', php='//', pico8='//', pike='//', pkgbuild='#', prolog='%',
props='#', protobuf='//', ps='%', pure='//', python='#', rails='#', rc='#',
rebol=';', rest='.. ', rexx='--', rhtml='<!--|-->', rstats='#', ruby='#',
rust='//', sass='//', scala='//', scheme=';', smalltalk='"|"', sml='(*)',
snobol4='#', sql='#', tcl='#', tex='%', text='', toml='#', vala='//',
vb='\'', vbscript='\'', verilog='//', vhdl='--', wsf='<!--|-->',
xml='<!--|-->', yaml='#'
}
-- escape all magic characters with a '%'
local function esc(str)
if not str then return "" end
return (str:gsub('%%', '%%%%')
:gsub('^%^', '%%^')
:gsub('%$$', '%%$')
:gsub('%(', '%%(')
:gsub('%)', '%%)')
:gsub('%.', '%%.')
:gsub('%[', '%%[')
:gsub('%]', '%%]')
:gsub('%*', '%%*')
:gsub('%+', '%%+')
:gsub('%-', '%%-')
:gsub('%?', '%%?'))
end
-- escape '%'
local function pesc(str)
if not str then return "" end
return str:gsub('%%', '%%%%')
end
function rtrim(s)
local n = #s
while n > 0 and s:find("^%s", n) do n = n - 1 end
return s:sub(1, n)
end
local function comment_line(lines, lnum, prefix, suffix)
if suffix ~= "" then suffix = " " .. suffix end
lines[lnum] = string.gsub(lines[lnum],
"(%s*)(.*)",
"%1" .. pesc(prefix) .. " %2" .. pesc(suffix))
end
local function uncomment_line(lines, lnum, prefix, suffix)
local match_str = "^(%s*)" .. esc(prefix) .. "%s?(.*)" .. esc(suffix)
m = table.pack(lines[lnum]:match(match_str))
lines[lnum] = m[1] .. rtrim(m[2])
end
local function is_comment(line, prefix)
return (line:match("^%s*(.+)"):sub(0, #prefix) == prefix)
end
local function toggle_line_comment(lines, lnum, prefix, suffix)
if not lines or not lines[lnum] then return end
if not lines[lnum]:match("^%s*(.+)") then return end -- ignore empty lines
if is_comment(lines[lnum], prefix) then
uncomment_line(lines, lnum, prefix, suffix)
else
comment_line(lines, lnum, prefix, suffix)
end
end
-- if one line inside the block is not a comment, comment the block.
-- only uncomment, if every single line is comment.
local function block_comment(lines, a, b, prefix, suffix)
local uncomment = true
for i=a,b do
if lines[i]:match("^%s*(.+)") and not is_comment(lines[i], prefix) then
uncomment = false
end
end
if uncomment then
for i=a,b do
if lines[i]:match("^%s*(.+)") then
uncomment_line(lines, i, prefix, suffix)
end
end
else
for i=a,b do
if lines[i]:match("^%s*(.+)") then
comment_line(lines, i, prefix, suffix)
end
end
end
end
vis:map(vis.modes.NORMAL, "gcc", function()
local win = vis.win
local lines = win.file.lines
local comment = comment_string[win.syntax]
if not comment then return end
local prefix, suffix = comment:match('^([^|]+)|?([^|]*)$')
if not prefix then return end
for sel in win:selections_iterator() do
local lnum = sel.line
local col = sel.col
toggle_line_comment(lines, lnum, prefix, suffix)
sel:to(lnum, col) -- restore cursor position
end
win:draw()
end, "Toggle comment on a the current line")
local function visual_f(i)
return function()
local win = vis.win
local lines = win.file.lines
local comment = comment_string[win.syntax]
if not comment then return end
local prefix, suffix = comment:match('^([^|]+)|?([^|]*)$')
if not prefix then return end
for sel in win:selections_iterator() do
local r = sel.range
local lnum = sel.line -- line number of cursor
local col = sel.col -- column of cursor
if sel.anchored and r then
sel.pos = r.start
local a = sel.line
sel.pos = r.finish
local b = sel.line - i
block_comment(lines, a, b, prefix, suffix)
sel:to(lnum, col) -- restore cursor position
end
end
win:draw()
vis.mode = vis.modes.NORMAL -- go to normal mode
end
end
vis:map(vis.modes.VISUAL_LINE, "gc", visual_f(1), "Toggle comment on the selected lines")
vis:map(vis.modes.VISUAL, "gc", visual_f(0), "Toggle comment on the selected lines")
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