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-- Copyright 2007 Mitchell mitchell<att>caladbolg.net. See LICENSE.
--- Handles file-specific settings (based on file extension).
module('textadept.mime_types', package.seeall)
---
-- [Local table] Language names with their associated lexers.
-- @class table
-- @name languages
local languages = {
cpp = 'cpp',
css = 'css',
diff = 'diff',
html = 'html',
javascript = 'javascript',
lua = 'lua',
makefile = 'makefile',
php = 'php',
python = 'python',
rhtml = 'rhtml',
ruby = 'ruby',
xml = 'xml'
}
local l = languages
---
-- [Local table] File extensions with their associated languages.
-- @class table
-- @name extensions
local extensions = {
c = l.cpp, cpp = l.cpp, cxx = l.cpp, h = l.cpp,
css = l.css,
diff = l.diff, patch = l.diff,
html = l.html, htm = l.html, shtml = l.html,
iface = l.makefile,
js = l.javascript,
lua = l.lua,
mak = l.makefile, makefile = l.makefile, Makefile = l.makefile,
php = l.php,
py = l.python, pyw = l.python,
rhtml = l.rhtml,
rb = l.rb, rbw = l.rb,
xml = l.xml, xsl = l.xml, xslt = l.xml
}
---
-- [Local table] Shebang words and their associated languages.
-- @class table
-- @name shebangs
local shebangs = {
lua = l.lua,
ruby = l.ruby
}
---
-- [Local function] Sets the buffer's lexer language based on a filename.
-- @param filename The filename used to set the lexer language.
-- @return boolean indicating whether or not a lexer language was set.
local function set_lexer_from_filename(filename)
local lexer
if filename then
local ext = filename:match('[^/]+$'):match('[^.]+$')
lexer = extensions[ext]
end
buffer:set_lexer_language(lexer or 'container')
return lexer
end
---
-- [Local function] Sets the buffer's lexer language based on a shebang line.
local function set_lexer_from_sh_bang()
local lexer
local line = buffer:get_line(0)
if line:match('^#!') then
line = line:gsub('[\\/]', ' ')
for word in line:gmatch('%S+') do
lexer = shebangs[word]
if lexer then break end
end
buffer:set_lexer_language(lexer)
end
end
---
-- [Local function] Loads a language module based on a filename (if it hasn't
-- been loaded already).
-- @param filename The filename used to load a language module from.
local function load_language_module_from_filename(filename)
if not filename then return end
local ext = filename:match('[^/]+$'):match('[^.]+$')
local lang = extensions[ext]
if lang then
local ret, err = pcall(require, lang)
if ret then
_m[lang].set_buffer_properties()
elseif not ret and not err:match("^module '"..lang.."' not found:") then
textadept.handlers.error(err)
end
end
end
---
-- [Local function] Performs actions suitable for a new buffer.
-- Sets the buffer's lexer language and loads the language module.
local function handle_new()
local buffer = buffer
if not set_lexer_from_filename(buffer.filename) then
set_lexer_from_sh_bang()
end
load_language_module_from_filename(buffer.filename)
end
---
-- [Local function] Performs actions suitable for when buffers are switched.
-- Sets the buffer's lexer language.
local function handle_switch()
if not set_lexer_from_filename(buffer.filename) then
set_lexer_from_sh_bang()
end
end
local handlers = textadept.handlers
handlers.add_handler_function('file_opened', handle_new)
handlers.add_handler_function('file_saved_as', handle_new)
handlers.add_handler_function('buffer_switch', handle_switch)
handlers.add_handler_function('view_new', handle_switch)
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