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-- Copyright 2007-2014 Mitchell mitchell.att.foicica.com. See LICENSE.
local M = {}
--[[ This comment is for LuaDoc.
---
-- The lua module.
-- It provides utilities for editing Lua code.
--
-- ## Key Bindings
--
-- + `Ctrl+L, M` (`⌘L, M` on Mac OSX | `M-L, M` in curses)
-- Open this module for editing.
-- + `Shift+Enter` (`⇧↩` | `S-Enter`)
-- Autocomplete an `if`, `while`, `for`, etc. control structure with the `end`
-- keyword.
module('_M.lua')]]
-- Autocompletion and documentation.
---
-- List of "fake" ctags files to use for autocompletion.
-- The kind 'm' is recognized as a module, 'f' as a function, 't' as a table and
-- 'F' as a module or table field.
-- @class table
-- @name tags
-- @see textadept.editing.autocomplete
M.tags = {_HOME..'/modules/lua/tags', _USERHOME..'/modules/lua/tags'}
---
-- Map of expression patterns to their types.
-- Expressions are expected to match after the '=' sign of a statement.
-- @class table
-- @name expr_types
-- @usage _M.lua.expr_types['^spawn%b()%s*$'] = 'proc'
M.expr_types = {['^[\'"]'] = 'string', ['^io%.p?open%s*%b()%s*$'] = 'file'}
local XPM = textadept.editing.XPM_IMAGES
local xpms = {m = XPM.CLASS, f = XPM.METHOD, F = XPM.VARIABLE, t = XPM.TYPEDEF}
textadept.editing.autocompleters.lua = function()
local list = {}
-- Retrieve the symbol behind the caret.
local line, pos = buffer:get_cur_line()
local symbol, op, part = line:sub(1, pos):match('([%w_%.]-)([%.:]?)([%w_]*)$')
if symbol == '' and part == '' and op ~= '' then return nil end -- lone .
symbol, part = symbol:gsub('^_G%.?', ''), part ~= '_G' and part or ''
-- Attempt to identify string type and file type symbols.
local buffer = buffer
local assignment = '%f[%w_]'..symbol:gsub('(%p)', '%%%1')..'%s*=%s*(.*)$'
for i = buffer:line_from_position(buffer.current_pos) - 1, 0, -1 do
local expr = buffer:get_line(i):match(assignment)
if expr then
for patt, type in pairs(M.expr_types) do
if expr:find(patt) then symbol = type break end
end
end
end
-- Search through ctags for completions for that symbol.
local name_patt = '^'..part
for i = 1, #M.tags do
if lfs.attributes(M.tags[i]) then
for line in io.lines(M.tags[i]) do
local name = line:match('^%S+')
if name:find(name_patt) and not list[name] then
local fields = line:match(';"\t(.*)$')
local k, class = fields:sub(1, 1), fields:match('class:(%S+)') or ''
if class == symbol and (op ~= ':' or k == 'f') then
list[#list + 1], list[name] = ("%s?%d"):format(name, xpms[k]), true
end
end
end
end
end
return #part, list
end
textadept.editing.api_files.lua = {
_HOME..'/modules/lua/api', _USERHOME..'/modules/lua/api'
}
-- Commands.
---
-- List of patterns for auto-`end` completion for control structures.
-- @class table
-- @name control_structure_patterns
-- @see try_to_autocomplete_end
local control_structure_patterns = {
'^%s*for', '^%s*function', '^%s*if', '^%s*repeat', '^%s*while',
'function%s*%b()%s*$', '^%s*local%s*function'
}
---
-- Tries to autocomplete control structures like `if`, `while`, `for`, etc. with
-- the `end` keyword.
-- @see control_structure_patterns
-- @name try_to_autocomplete_end
function M.try_to_autocomplete_end()
local line_num = buffer:line_from_position(buffer.current_pos)
local line = buffer:get_line(line_num)
local line_indentation = buffer.line_indentation
for _, patt in ipairs(control_structure_patterns) do
if line:find(patt) then
local indent = line_indentation[line_num]
buffer:begin_undo_action()
buffer:new_line()
buffer:new_line()
buffer:add_text(patt:find('repeat') and 'until' or 'end')
line_indentation[line_num + 1] = indent + buffer.tab_width
buffer:line_up()
buffer:line_end()
buffer:end_undo_action()
return true
end
end
return false
end
-- Show syntax errors as annotations.
events.connect(events.FILE_AFTER_SAVE, function()
if buffer:get_lexer() ~= 'lua' then return end
buffer:annotation_clear_all()
local text = buffer:get_text():gsub('^#![^\n]+', '') -- ignore shebang line
local f, err = load(text)
if f then return end
local line, msg = err:match('^.-:(%d+):%s*(.+)$')
if line then
buffer.annotation_text[line - 1] = msg
buffer.annotation_style[line - 1] = 8 -- error style number
buffer:goto_line(line - 1)
end
end)
---
-- Container for Lua-specific key bindings.
-- @class table
-- @name _G.keys.lua
keys.lua = {
[keys.LANGUAGE_MODULE_PREFIX] = {
m = {io.open_file, _HOME..'/modules/lua/init.lua'},
},
['s\n'] = M.try_to_autocomplete_end,
}
-- Snippets.
if type(snippets) == 'table' then
---
-- Container for Lua-specific snippets.
-- @class table
-- @name _G.snippets.lua
snippets.lua = {
}
end
return M
|
