1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
-- Copyright 2007-2013 Mitchell mitchell.att.foicica.com. See LICENSE.
local M = {}
--[[ This comment is for LuaDoc.
---
-- Handles file type detection for Textadept.
-- @field _G.events.LANGUAGE_MODULE_LOADED (string)
-- Emitted after loading a language-specific module.
-- This is useful for overriding a language-specific module's key bindings
-- or other properties since the module is not loaded when Textadept starts.
-- Arguments:
--
-- * *`lang`*: The language lexer name.
module('_M.textadept.mime_types')]]
-- Events.
events.LANGUAGE_MODULE_LOADED = 'language_module_loaded'
---
-- Map of file extensions (excluding the leading '.') to their associated
-- lexers.
-- If the file type is not recognized by shebang words or first-line patterns,
-- each file extension is matched against the file's extension.
-- @class table
-- @name extensions
M.extensions = {}
---
-- Map of shebang words to their associated lexers.
-- If the file has a shebang line, a line that starts with "#!" and is the first
-- line in the file, each shebang word is matched against that line.
-- @class table
-- @name shebangs
M.shebangs = {}
---
-- Map of first-line patterns to their associated lexers.
-- If a file type is not recognized by shebang words, each pattern is matched
-- against the first line in the file.
-- @class table
-- @name patterns
M.patterns = {}
---
-- List of available lexers.
-- @class table
-- @name lexers
M.lexers = {}
local GETLEXERLANGUAGE = _SCINTILLA.properties.lexer_language[1]
-- LuaDoc is in core/.buffer.luadoc.
local function get_lexer(buffer, current)
buffer:check_global()
local lexer = buffer:private_lexer_call(GETLEXERLANGUAGE)
return current and lexer:match('[^/]+$') or lexer:match('^[^/]+')
end
local SETDIRECTPOINTER = _SCINTILLA.properties.doc_pointer[2]
local SETLEXERLANGUAGE = _SCINTILLA.properties.lexer_language[2]
-- LuaDoc is in core/.buffer.luadoc.
local function set_lexer(buffer, lang)
buffer:check_global()
-- If no language was given, attempt to detect it.
if not lang then
local line = buffer:get_line(0)
-- Detect from shebang line.
if line:find('^#!') then
for word in line:gsub('[/\\]', ' '):gmatch('%S+') do
if M.shebangs[word] then lang = M.shebangs[word] break end
end
end
-- Detect from first line.
if not lang then
for patt, lexer in pairs(M.patterns) do
if line:find(patt) then lang = lexer break end
end
end
-- Detect from file extension.
if not lang and buffer.filename then
lang = M.extensions[buffer.filename:match('[^/\\.]+$')]
end
if not lang then lang = 'text' end
end
-- Set the lexer and load its language-specific module.
buffer._lexer = lang
buffer:private_lexer_call(SETDIRECTPOINTER, buffer.direct_pointer)
buffer:private_lexer_call(SETLEXERLANGUAGE, lang)
if package.searchpath(lang, package.path) then
_M[lang] = require(lang)
local post_init = lang..'.post_init'
if package.searchpath(post_init, package.path) then require(post_init) end
events.emit(events.LANGUAGE_MODULE_LOADED, lang)
end
local last_line = buffer.first_visible_line + buffer.lines_on_screen
buffer:colourise(0, buffer:position_from_line(last_line + 1))
end
-- LuaDoc is in core/.buffer.luadoc.
local function get_style_name(buffer, style_num)
buffer:check_global()
if style_num < 0 or style_num > 255 then error('0 <= style_num < 256') end
return buffer:private_lexer_call(style_num)
end
-- Gives new buffers lexer-specific functions.
local function set_lexer_functions()
buffer.get_lexer, buffer.set_lexer = get_lexer, set_lexer
buffer.get_style_name = get_style_name
end
events.connect(events.BUFFER_NEW, set_lexer_functions, 1)
-- Scintilla's first buffer does not have these.
if not RESETTING then set_lexer_functions() end
-- Auto-detect lexer on file open or save as.
events.connect(events.FILE_OPENED, function() buffer:set_lexer() end)
events.connect(events.FILE_SAVED_AS, function() buffer:set_lexer() end)
-- Restores the buffer's lexer.
local function restore_lexer() buffer:set_lexer(buffer._lexer) end
events.connect(events.BUFFER_AFTER_SWITCH, restore_lexer)
events.connect(events.VIEW_NEW, restore_lexer)
events.connect(events.RESET_AFTER, restore_lexer)
---
-- Prompts the user to select a lexer for the current buffer.
-- @see buffer.set_lexer
-- @name select_lexer
function M.select_lexer()
local lexer = gui.filteredlist(_L['Select Lexer'], _L['Name'], M.lexers)
if lexer then buffer:set_lexer(lexer) end
end
-- Load mime-types.
local function process_line(line)
if line:find('^%s*%%') then return end
if line:find('^%s*[^#/]') then -- extension definition
local ext, lexer_name = line:match('^%s*(.+)%s+(%S+)$')
if ext and lexer_name then M.extensions[ext] = lexer_name end
else -- shebang or pattern
local ch, text, lexer_name = line:match('^%s*([#/])(.+)%s+(%S+)$')
if ch and text and lexer_name then
(ch == '#' and M.shebangs or M.patterns)[text] = lexer_name
end
end
end
local f = io.open(_HOME..'/modules/textadept/mime_types.conf', 'rb')
for line in f:lines() do process_line(line) end
f:close()
f = io.open(_USERHOME..'/mime_types.conf', 'rb')
if f then
for line in f:lines() do process_line(line) end
f:close()
end
-- Generate lexer list.
local lexers_found = {}
for _, dir in ipairs{_HOME..'/lexers', _USERHOME..'/lexers'} do
if lfs.attributes(dir) then
for lexer in lfs.dir(dir) do
if lexer:find('%.lua$') and lexer ~= 'lexer.lua' then
lexers_found[lexer:match('^(.+)%.lua$')] = true
end
end
end
end
for lexer in pairs(lexers_found) do M.lexers[#M.lexers + 1] = lexer end
table.sort(M.lexers)
return M
|
