62f897fdf5
* .emacs only loops through .emacs.d and runs the *.el files there. * files are automatically compiled before loading. But only if it hasn't already been compiled. * all emacs el files, save for the startup scripts, have been moved to .emacs.d/elisp
1135 lines
40 KiB
EmacsLisp
1135 lines
40 KiB
EmacsLisp
;;; lua-mode.el --- a major-mode for editing Lua scripts
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;; Copyright (C) 1997, 2001, 2004, 2006, 2007, 2010 Free Software Foundation, Inc.
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;; Author: 2010 Reuben Thomas <rrt@sc3d.org>
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;; 2006 Juergen Hoetzel <juergen@hoetzel.info>
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;; 2004 various (support for Lua 5 and byte compilation)
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;; 2001 Christian Vogler <cvogler@gradient.cis.upenn.edu>
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;; 1997 Bret Mogilefsky <mogul-lua@gelatinous.com> starting from
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;; tcl-mode by Gregor Schmid <schmid@fb3-s7.math.tu-berlin.de>
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;; with tons of assistance from
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;; Paul Du Bois <pld-lua@gelatinous.com> and
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;; Aaron Smith <aaron-lua@gelatinous.com>.
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;; URL: http://lua-mode.luaforge.net/
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;; Version: 20100617
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;; This file is NOT part of Emacs.
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;;
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License
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;; as published by the Free Software Foundation; either version 2
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;; of the License, or (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, write to the Free Software
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;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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;; MA 02110-1301, USA.
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;; Keywords: languages, processes, tools
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;;; Commentary:
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;; Thanks to Tobias Polzin <polzin@gmx.de> for function indenting
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;; patch: Indent "(" like "{"
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;; Thanks to Fabien <fleutot@gmail.com> for imenu patches.
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;; Thanks to Simon Marshall <simonm@mail.esrin.esa.it> and Olivier
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;; Andrieu <oandrieu@gmail.com> for font-lock patches.
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;; Additional font-lock highlighting and indentation tweaks by
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;; Adam D. Moss <adam@gimp.org>.
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;; INSTALLATION:
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;; To install, just drop this file into a directory on your load-path (and
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;; byte-compile it). To set up Emacs to automatically edit files ending in
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;; ".lua" using lua-mode add the following to your init file:
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;; (setq auto-mode-alist (cons '("\\.lua$" . lua-mode) auto-mode-alist))
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;; (autoload 'lua-mode "lua-mode" "Lua editing mode." t)
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;; Usage
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;; Lua-mode supports c-mode style formatting and sending of
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;; lines/regions/files to a Lua interpreter. An interpreter (see
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;; variable `lua-default-application') will be started if you try to
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;; send some code and none is running. You can use the process-buffer
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;; (named after the application you chose) as if it were an
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;; interactive shell. See the documentation for `comint.el' for
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;; details.
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;; Lua-mode works with Hide Show minor mode (see ``hs-minor-mode``).
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;; Key-bindings
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;; To see all the keybindings for Lua mode, look at `lua-setup-keymap'
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;; or start `lua-mode' and type `\C-h m'.
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;; The keybindings may seem strange, since I prefer to use them with
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;; lua-prefix-key set to nil, but since those keybindings are already used
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;; the default for `lua-prefix-key' is `\C-c', which is the conventional
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;; prefix for major-mode commands.
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;; You can customise the keybindings either by setting `lua-prefix-key'
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;; or by putting the following in your .emacs
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;; (setq lua-mode-map (make-sparse-keymap))
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;; and
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;; (define-key lua-mode-map <your-key> <function>)
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;; for all the functions you need.
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;;; Code:
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(require 'comint)
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;; Local variables
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(defgroup lua nil
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"Major mode for editing lua code."
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:prefix "lua-"
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:group 'languages)
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(defcustom lua-default-application "lua"
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"Default application to run in lua subprocess."
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:type 'string
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:group 'lua)
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(defcustom lua-default-command-switches (list "-i")
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"Command switches for `lua-default-application'.
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Should be a list of strings."
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:type '(repeat string)
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:group 'lua)
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(defcustom lua-always-show t
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"*Non-nil means display lua-process-buffer after sending a command."
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:type 'boolean
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:group 'lua)
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(defcustom lua-search-url-prefix "http://www.lua.org/manual/5.1/manual.html#pdf-"
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"*URL at which to search for documentation on a word"
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:type 'string
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:group 'lua)
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(defvar lua-process nil
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"The active Lua subprocess")
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(defvar lua-process-buffer nil
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"Buffer used for communication with Lua subprocess")
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(defvar lua-mode-map nil
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"Keymap used with lua-mode.")
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(defvar lua-electric-flag t
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"If t, electric actions (like automatic reindentation) will happen when an electric
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key like `{' is pressed")
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(make-variable-buffer-local 'lua-electric-flag)
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(defcustom lua-prefix-key "\C-c"
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"Prefix for all lua-mode commands."
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:type 'string
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:group 'lua)
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(defcustom lua-prompt-regexp "[^\n]*\\(>[\t ]+\\)+$"
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"Regexp which matches the Lua program's prompt."
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:group 'lua
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:type 'regexp
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)
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(defcustom lua-traceback-line-re
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"^\\(?:[\t ]*\\|.*>[\t ]+\\)\\([^\n\t ]+\\):\\([0-9]+\\):"
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"Regular expression that describes tracebacks and errors."
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:group 'lua
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:type 'regexp
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)
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(defcustom lua-jump-on-traceback t
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"*Jump to innermost traceback location in *lua* buffer. When this
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variable is non-nil and a traceback occurs when running Lua code in a
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subprocess, jump immediately to the source code of the innermost
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traceback location."
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:group 'lua
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:type 'boolean
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)
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(defvar lua-mode-hook nil
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"Hooks called when Lua mode fires up.")
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(defvar lua-region-start (make-marker)
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"Start of special region for Lua communication.")
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(defvar lua-region-end (make-marker)
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"End of special region for Lua communication.")
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(defvar lua-indent-level 3
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"Amount by which Lua subexpressions are indented.")
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(defvar lua-mode-menu (make-sparse-keymap "Lua")
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"Keymap for lua-mode's menu.")
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(defvar lua-emacs-menu
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'(["Restart With Whole File" lua-restart-with-whole-file t]
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["Kill Process" lua-kill-process t]
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["Hide Process Buffer" lua-hide-process-buffer t]
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["Show Process Buffer" lua-show-process-buffer t]
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["Beginning Of Proc" lua-beginning-of-proc t]
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["End Of Proc" lua-end-of-proc t]
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["Set Lua-Region Start" lua-set-lua-region-start t]
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["Set Lua-Region End" lua-set-lua-region-end t]
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["Send Lua-Region" lua-send-lua-region t]
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["Send Current Line" lua-send-current-line t]
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["Send Region" lua-send-region t]
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["Send Proc" lua-send-proc t]
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["Send Buffer" lua-send-buffer t]
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["Search Documentation" lua-search-documentation t])
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"Emacs menu for Lua mode.")
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(defvar lua-font-lock-keywords
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(eval-when-compile
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(list
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;; Handle variable names
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;; local blalba =
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;; ^^^^^^
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'("\\(local[ \t]+\\(\\sw+\\)[ \t]*=\\)"
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(2 font-lock-variable-name-face))
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;; Function name declarations.
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'("^[ \t]*\\_<\\(\\(local[ \t]+\\)?function\\)\\_>[ \t]+\\(\\(\\sw:\\|\\sw\\.\\|\\sw_\\|\\sw\\)+\\)"
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(1 font-lock-keyword-face) (3 font-lock-function-name-face nil t))
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;; Handle function names in assignments
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'("\\(\\(\\sw:\\|\\sw\\.\\|\\sw_\\|\\sw\\)+\\)[ \t]*=[ \t]*\\(function\\)\\_>"
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(1 font-lock-function-name-face nil t) (3 font-lock-keyword-face))
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;; Keywords.
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(concat "\\_<"
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(regexp-opt '("and" "break" "do" "else" "elseif" "end" "false"
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"for" "function" "if" "in" "local" "nil" "not"
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"or" "repeat" "return" "then" "true" "until"
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"while") t)
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"\\_>")
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"Default expressions to highlight in Lua mode.")))
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(defvar lua-imenu-generic-expression
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'((nil "^[ \t]*\\(?:local[ \t]+\\)?function[ \t]+\\(\\(\\sw:\\|\\sw_\\|\\sw\\.\\|\\sw\\)+\\)" 1))
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"Imenu generic expression for lua-mode. See `imenu-generic-expression'.")
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(defvar lua-mode-abbrev-table nil
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"Abbreviation table used in lua-mode buffers.")
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(defvar lua-sexp-alist '(("then" . "end")
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("function" . "end")
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("do" . "end")))
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(define-abbrev-table 'lua-mode-abbrev-table
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'(
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("end" "end" lua-indent-line 0)
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("else" "else" lua-indent-line 0)
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("elseif" "elseif" lua-indent-line 0)
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))
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(defconst lua-indent-whitespace " \t"
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"Character set that constitutes whitespace for indentation in lua.")
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(eval-and-compile
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(defalias 'lua-make-temp-file
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(if (fboundp 'make-temp-file)
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'make-temp-file
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(lambda (prefix &optional dir-flag) ;; Simple implementation
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(expand-file-name
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(make-temp-name prefix)
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(if (fboundp 'temp-directory)
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(temp-directory)
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temporary-file-directory))))))
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;;;###autoload
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(defun lua-mode ()
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"Major mode for editing Lua code.
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The following keys are bound:
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\\{lua-mode-map}
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"
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(interactive)
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(let ((switches nil)
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s)
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(kill-all-local-variables)
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(setq major-mode 'lua-mode)
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(setq mode-name "Lua")
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(setq comint-prompt-regexp lua-prompt-regexp)
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(make-local-variable 'lua-default-command-switches)
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(set (make-local-variable 'indent-line-function) 'lua-indent-line)
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(set (make-local-variable 'comment-start) "--")
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(set (make-local-variable 'comment-start-skip) "--")
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(set (make-local-variable 'font-lock-defaults)
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'(lua-font-lock-keywords
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nil nil ((?_ . "w"))))
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(set (make-local-variable 'imenu-generic-expression)
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lua-imenu-generic-expression)
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(setq local-abbrev-table lua-mode-abbrev-table)
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(abbrev-mode 1)
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(make-local-variable 'lua-default-eval)
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(or lua-mode-map
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(lua-setup-keymap))
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(use-local-map lua-mode-map)
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(set-syntax-table (copy-syntax-table))
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(modify-syntax-entry ?+ ".")
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(modify-syntax-entry ?- ". 12")
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(modify-syntax-entry ?* ".")
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(modify-syntax-entry ?/ ".")
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(modify-syntax-entry ?^ ".")
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;; This might be better as punctuation, as for C, but this way you
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;; can treat table index as symbol.
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(modify-syntax-entry ?. "_") ; e.g. `io.string'
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(modify-syntax-entry ?> ".")
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(modify-syntax-entry ?< ".")
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(modify-syntax-entry ?= ".")
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(modify-syntax-entry ?~ ".")
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(modify-syntax-entry ?\n ">")
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(modify-syntax-entry ?\' "\"")
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(modify-syntax-entry ?\" "\"")
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(if (and (featurep 'menubar)
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current-menubar
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(not (assoc "Lua" current-menubar)))
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(progn
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(set-buffer-menubar (copy-sequence current-menubar))
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(add-menu nil "Lua" lua-emacs-menu)))
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;; Append Lua menu to popup menu for Emacs.
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(if (boundp 'mode-popup-menu)
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(setq mode-popup-menu
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(cons (concat mode-name " Mode Commands") lua-emacs-menu)))
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;; hideshow setup
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(unless (assq 'lua-mode hs-special-modes-alist)
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(add-to-list 'hs-special-modes-alist
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`(lua-mode
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,(regexp-opt (mapcar 'car lua-sexp-alist) 'words) ;start
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,(regexp-opt (mapcar 'cdr lua-sexp-alist) 'words) ;end
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nil lua-forward-sexp)))
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(run-hooks 'lua-mode-hook)))
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;;;###autoload
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(add-to-list 'auto-mode-alist '("\\.lua$" . lua-mode))
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(defun lua-setup-keymap ()
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"Set up keymap for Lua mode.
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If the variable `lua-prefix-key' is nil, the bindings go directly
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to `lua-mode-map', otherwise they are prefixed with `lua-prefix-key'."
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(setq lua-mode-map (make-sparse-keymap))
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(define-key lua-mode-map [menu-bar lua-mode]
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(cons "Lua" lua-mode-menu))
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(define-key lua-mode-map "}" 'lua-electric-match)
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(define-key lua-mode-map "]" 'lua-electric-match)
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(define-key lua-mode-map ")" 'lua-electric-match)
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(define-key lua-mode-map (kbd "C-M-a") 'lua-beginning-of-proc)
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(define-key lua-mode-map (kbd "C-M-e") 'lua-end-of-proc)
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(define-key lua-mode-map (kbd "C-M-<home>") 'lua-beginning-of-proc)
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(define-key lua-mode-map (kbd "C-M-<end>") 'lua-end-of-proc)
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(let ((map (if lua-prefix-key
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(make-sparse-keymap)
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lua-mode-map)))
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;; communication
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(define-key map "\C-l" 'lua-send-buffer)
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(define-key map "\C-f" 'lua-search-documentation)
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(if lua-prefix-key
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(define-key lua-mode-map lua-prefix-key map))
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))
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(defun lua-electric-match (arg)
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"Insert character and adjust indentation."
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(interactive "P")
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(insert-char last-command-char (prefix-numeric-value arg))
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(if lua-electric-flag
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(lua-indent-line))
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(blink-matching-open))
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;; private functions
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(defun lua-syntax-status ()
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"Returns the syntactic status of the character after the point."
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(parse-partial-sexp (save-excursion (beginning-of-line) (point))
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(point)))
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(defun lua-string-p ()
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"Returns true if the point is in a string."
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(elt (lua-syntax-status) 3))
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(defun lua-comment-p ()
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"Returns true if the point is in a comment."
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(elt (lua-syntax-status) 4))
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(defun lua-comment-or-string-p ()
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"Returns true if the point is in a comment or string."
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(let ((parse-result (lua-syntax-status)))
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(or (elt parse-result 3) (elt parse-result 4))))
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(defun lua-indent-line ()
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"Indent current line for Lua mode.
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Return the amount the indentation changed by."
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(let ((indent (max 0 (- (lua-calculate-indentation nil)
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(lua-calculate-indentation-left-shift))))
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beg shift-amt
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(case-fold-search nil)
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(pos (- (point-max) (point))))
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(beginning-of-line)
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(setq beg (point))
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(skip-chars-forward lua-indent-whitespace)
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(setq shift-amt (- indent (current-column)))
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(when (not (zerop shift-amt))
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(delete-region beg (point))
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(indent-to indent))
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;; If initial point was within line's indentation,
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;; position after the indentation. Else stay at same point in text.
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(if (> (- (point-max) pos) (point))
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(goto-char (- (point-max) pos)))
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shift-amt
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indent))
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(defun lua-find-regexp (direction regexp &optional limit ignore-p)
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"Searches for a regular expression in the direction specified.
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Direction is one of 'forward and 'backward.
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By default, matches in comments and strings are ignored, but what to ignore is
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configurable by specifying ignore-p. If the regexp is found, returns point
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position, nil otherwise.
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ignore-p returns true if the match at the current point position should be
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ignored, nil otherwise."
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(let ((ignore-func (or ignore-p 'lua-comment-or-string-p))
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(search-func (if (eq direction 'forward)
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're-search-forward 're-search-backward))
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(case-fold-search nil))
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(catch 'found
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(while (funcall search-func regexp limit t)
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(if (not (funcall ignore-func))
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(throw 'found (point)))))))
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(defun lua-backwards-to-block-begin-or-end ()
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"Move backwards to nearest block begin or end. Returns nil if not successful."
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(interactive)
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(lua-find-regexp 'backward lua-block-regexp))
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(defconst lua-block-regexp
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(eval-when-compile
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(concat
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"\\(\\_<"
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(regexp-opt '("do" "function" "repeat" "then"
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"else" "elseif" "end" "until") t)
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"\\_>\\)\\|"
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(regexp-opt '("{" "(" "[" "]" ")" "}") t))
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))
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(defconst lua-block-token-alist
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;; The absence of "else" is deliberate. This construct in a way both
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;; opens and closes a block. As a result, it is difficult to handle
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;; cleanly. It is also ambiguous - if we are looking for the match
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;; of "else", should we look backward for "then/elseif" or forward
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;; for "end"?
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;; Maybe later we will find a way to handle it.
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'(("do" "\\_<end\\_>" open)
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("function" "\\_<end\\_>" open)
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("repeat" "\\_<until\\_>" open)
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("then" "\\_<\\(e\\(lseif\\|nd\\)\\)\\_>" open)
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("{" "}" open)
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("[" "]" open)
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("(" ")" open)
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("elseif" "\\_<then\\_>" close)
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("end" "\\_<\\(do\\|function\\|then\\)\\_>" close)
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("until" "\\_<repeat\\_>" close)
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("}" "{" close)
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("]" "\\[" close)
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(")" "(" close)))
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(defconst lua-indentation-modifier-regexp
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;; The absence of else is deliberate, since it does not modify the
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;; indentation level per se. It only may cause the line, in which the
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;; else is, to be shifted to the left.
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(concat
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"\\(\\_<"
|
|
;; n.b. "local function" is a bit of a hack, allowing only a single space
|
|
(regexp-opt '("do" "local function" "function" "repeat" "then") t)
|
|
"\\_>\\|"
|
|
(regexp-opt '("{" "(" "["))
|
|
"\\)\\|\\(\\_<"
|
|
(regexp-opt '("elseif" "end" "until") t)
|
|
"\\_>\\|"
|
|
(regexp-opt '("]" ")" "}"))
|
|
"\\)")
|
|
|
|
)
|
|
|
|
(defun lua-find-matching-token-word (token search-start)
|
|
(let* ((token-info (assoc token lua-block-token-alist))
|
|
(match (car (cdr token-info)))
|
|
(match-type (car (cdr (cdr token-info))))
|
|
(search-direction (if (eq match-type 'open) 'forward 'backward)))
|
|
;; if we are searching forward from the token at the current point
|
|
;; (i.e. for a closing token), need to step one character forward
|
|
;; first, or the regexp will match the opening token.
|
|
(if (eq match-type 'open) (forward-char 1))
|
|
(if search-start (goto-char search-start))
|
|
(catch 'found
|
|
(while (lua-find-regexp search-direction lua-indentation-modifier-regexp)
|
|
;; have we found a valid matching token?
|
|
(let ((found-token (match-string 0))
|
|
(found-pos (match-beginning 0)))
|
|
(if (string-match match found-token)
|
|
(throw 'found found-pos))
|
|
;; no - then there is a nested block. If we were looking for
|
|
;; a block begin token, found-token must be a block end
|
|
;; token; likewise, if we were looking for a block end token,
|
|
;; found-token must be a block begin token, otherwise there
|
|
;; is a grammatical error in the code.
|
|
(if (not (and
|
|
(eq (car (cdr (cdr (assoc found-token lua-block-token-alist))))
|
|
match-type)
|
|
(lua-find-matching-token-word found-token nil)))
|
|
(throw 'found nil)))))))
|
|
|
|
(defun lua-goto-matching-block-token (&optional search-start parse-start)
|
|
"Find block begion/end token matching the one at the point.
|
|
This function moves the point to the token that matches the one
|
|
at the current point. Returns the point position of the first character of
|
|
the matching token if successful, nil otherwise."
|
|
(if parse-start (goto-char parse-start))
|
|
(let ((case-fold-search nil))
|
|
(if (looking-at lua-indentation-modifier-regexp)
|
|
(let ((position (lua-find-matching-token-word (match-string 0)
|
|
search-start)))
|
|
(and position
|
|
(goto-char position))))))
|
|
|
|
(defun lua-goto-matching-block (&optional noreport)
|
|
"Go to the keyword balancing the one under the point.
|
|
If the point is on a keyword/brace that starts a block, go to the
|
|
matching keyword that ends the block, and vice versa."
|
|
(interactive)
|
|
;; search backward to the beginning of the keyword if necessary
|
|
(if (eq (char-syntax (following-char)) ?w)
|
|
(re-search-backward "\\_<" nil t))
|
|
(let ((position (lua-goto-matching-block-token)))
|
|
(if (and (not position)
|
|
(not noreport))
|
|
(error "Not on a block control keyword or brace.")
|
|
position)))
|
|
|
|
(defun lua-goto-nonblank-previous-line ()
|
|
"Puts the point at the first previous line that is not blank.
|
|
Returns the point, or nil if it reached the beginning of the buffer"
|
|
(catch 'found
|
|
(beginning-of-line)
|
|
(while t
|
|
(if (bobp) (throw 'found nil))
|
|
(forward-char -1)
|
|
(beginning-of-line)
|
|
(if (not (looking-at "\\s *\\(--.*\\)?$")) (throw 'found (point))))))
|
|
|
|
(defun lua-goto-nonblank-next-line ()
|
|
"Puts the point at the first next line that is not blank.
|
|
Returns the point, or nil if it reached the end of the buffer"
|
|
(catch 'found
|
|
(end-of-line)
|
|
(while t
|
|
(forward-line)
|
|
(if (eobp) (throw 'found nil))
|
|
(beginning-of-line)
|
|
(if (not (looking-at "\\s *\\(--.*\\)?$")) (throw 'found (point))))))
|
|
|
|
(eval-when-compile
|
|
(defconst lua-operator-class
|
|
"-+*/^.=<>~"))
|
|
|
|
(defconst lua-cont-eol-regexp
|
|
(eval-when-compile
|
|
(concat
|
|
"\\(\\_<"
|
|
(regexp-opt '("and" "or" "not" "in" "for" "while"
|
|
"local" "function") t)
|
|
"\\_>\\|"
|
|
"\\(^\\|[^" lua-operator-class "]\\)"
|
|
(regexp-opt '("+" "-" "*" "/" "^" ".." "==" "=" "<" ">" "<=" ">=" "~=") t)
|
|
"\\)"
|
|
"\\s *\\=")
|
|
))
|
|
|
|
|
|
(defconst lua-cont-bol-regexp
|
|
(eval-when-compile
|
|
(concat
|
|
"\\=\\s *"
|
|
"\\(\\_<"
|
|
(regexp-opt '("and" "or" "not") t)
|
|
"\\_>\\|"
|
|
(regexp-opt '("+" "-" "*" "/" "^" ".." "==" "=" "<" ">" "<=" ">=" "~=") t)
|
|
"\\($\\|[^" lua-operator-class "]\\)"
|
|
"\\)")
|
|
|
|
))
|
|
|
|
(defun lua-last-token-continues-p ()
|
|
"Returns true if the last token on this line is a continuation token."
|
|
(let (line-begin
|
|
line-end)
|
|
(save-excursion
|
|
(beginning-of-line)
|
|
(setq line-begin (point))
|
|
(end-of-line)
|
|
(setq line-end (point))
|
|
;; we need to check whether the line ends in a comment and
|
|
;; skip that one.
|
|
(while (lua-find-regexp 'backward "-" line-begin 'lua-string-p)
|
|
(if (looking-at "--")
|
|
(setq line-end (point))))
|
|
(goto-char line-end)
|
|
(re-search-backward lua-cont-eol-regexp line-begin t))))
|
|
|
|
(defun lua-first-token-continues-p ()
|
|
"Returns true if the first token on this line is a continuation token."
|
|
(let (line-end)
|
|
(save-excursion
|
|
(end-of-line)
|
|
(setq line-end (point))
|
|
(beginning-of-line)
|
|
(re-search-forward lua-cont-bol-regexp line-end t))))
|
|
|
|
(defun lua-is-continuing-statement-p (&optional parse-start)
|
|
"Return non-nil if the line continues a statement.
|
|
More specifically, return the point in the line that is continued.
|
|
The criteria for a continuing statement are:
|
|
|
|
* the last token of the previous line is a continuing op,
|
|
OR the first token of the current line is a continuing op
|
|
|
|
"
|
|
(let ((prev-line nil))
|
|
(save-excursion
|
|
(if parse-start (goto-char parse-start))
|
|
(save-excursion (setq prev-line (lua-goto-nonblank-previous-line)))
|
|
(and prev-line
|
|
(or (lua-first-token-continues-p)
|
|
(and (goto-char prev-line)
|
|
;; check last token of previous nonblank line
|
|
(lua-last-token-continues-p)))))))
|
|
|
|
(defun lua-make-indentation-info-pair ()
|
|
"This is a helper function to lua-calculate-indentation-info. Don't
|
|
use standalone."
|
|
(cond ((string-equal found-token "function")
|
|
;; this is the location where we need to start searching for the
|
|
;; matching opening token, when we encounter the next closing token.
|
|
;; It is primarily an optimization to save some searching time.
|
|
(cons 'absolute (+ (save-excursion (goto-char found-pos)
|
|
(current-column))
|
|
lua-indent-level)))
|
|
((or (string-equal found-token "{")
|
|
(string-equal found-token "("))
|
|
(save-excursion
|
|
;; expression follows -> indent at start of next expression
|
|
(if (and (not (search-forward-regexp "[[:space:]]--" (line-end-position) t))
|
|
(search-forward-regexp "[^[:space:]]" (line-end-position) t))
|
|
(cons 'absolute (1- (current-column)))
|
|
(cons 'relative lua-indent-level))))
|
|
;; closing tokens follow
|
|
((string-equal found-token "end")
|
|
(save-excursion
|
|
(lua-goto-matching-block-token nil found-pos)
|
|
(if (looking-at "\\_<function\\_>")
|
|
(cons 'absolute
|
|
(+ (current-indentation)
|
|
(lua-calculate-indentation-block-modifier
|
|
nil (point))))
|
|
(cons 'relative (- lua-indent-level)))))
|
|
((or (string-equal found-token ")")
|
|
(string-equal found-token "}"))
|
|
(save-excursion
|
|
(lua-goto-matching-block-token nil found-pos)
|
|
(cons 'absolute
|
|
(+ (current-indentation)
|
|
(lua-calculate-indentation-block-modifier
|
|
nil (point))))))
|
|
(t
|
|
(cons 'relative (if (nth 2 (match-data))
|
|
;; beginning of a block matched
|
|
lua-indent-level
|
|
;; end of a block matched
|
|
(- lua-indent-level))))))
|
|
|
|
|
|
(defun lua-calculate-indentation-info (&optional parse-start parse-end)
|
|
"For each block token on the line, computes how it affects the indentation.
|
|
The effect of each token can be either a shift relative to the current
|
|
indentation level, or indentation to some absolute column. This information
|
|
is collected in a list of indentation info pairs, which denote absolute
|
|
and relative each, and the shift/column to indent to."
|
|
(let* ((line-end (save-excursion (end-of-line) (point)))
|
|
(search-stop (if parse-end (min parse-end line-end) line-end))
|
|
(indentation-info nil))
|
|
(if parse-start (goto-char parse-start))
|
|
(save-excursion
|
|
(beginning-of-line)
|
|
(while (lua-find-regexp 'forward lua-indentation-modifier-regexp
|
|
search-stop)
|
|
(let ((found-token (match-string 0))
|
|
(found-pos (match-beginning 0))
|
|
(found-end (match-end 0))
|
|
(data (match-data)))
|
|
(setq indentation-info
|
|
(cons (lua-make-indentation-info-pair) indentation-info)))))
|
|
indentation-info))
|
|
|
|
(defun lua-accumulate-indentation-info (info)
|
|
"Accumulates the indentation information previously calculated by
|
|
lua-calculate-indentation-info. Returns either the relative indentation
|
|
shift, or the absolute column to indent to."
|
|
(let ((info-list (reverse info))
|
|
(type 'relative)
|
|
(accu 0))
|
|
(mapcar (lambda (x)
|
|
(setq accu (if (eq 'absolute (car x))
|
|
(progn (setq type 'absolute)
|
|
(cdr x))
|
|
(+ accu (cdr x)))))
|
|
info-list)
|
|
(cons type accu)))
|
|
|
|
(defun lua-calculate-indentation-block-modifier (&optional parse-start
|
|
parse-end)
|
|
"Return amount by which this line modifies the indentation.
|
|
Beginnings of blocks add lua-indent-level once each, and endings
|
|
of blocks subtract lua-indent-level once each. This function is used
|
|
to determine how the indentation of the following line relates to this
|
|
one."
|
|
(if parse-start (goto-char parse-start))
|
|
(let ((case-fold-search nil)
|
|
(indentation-info (lua-accumulate-indentation-info
|
|
(lua-calculate-indentation-info nil parse-end))))
|
|
(if (eq (car indentation-info) 'absolute)
|
|
(- (cdr indentation-info)
|
|
(current-indentation)
|
|
;; reduce indentation if this line also starts new continued statement
|
|
;; or next line cont. this line
|
|
;;This is for aesthetic reasons: the indentation should be
|
|
;;dosomething(d +
|
|
;; e + f + g)
|
|
;;not
|
|
;;dosomething(d +
|
|
;; e + f + g)"
|
|
(save-excursion
|
|
(or (and (lua-last-token-continues-p) lua-indent-level)
|
|
(and (lua-goto-nonblank-next-line) (lua-first-token-continues-p) lua-indent-level)
|
|
0)))
|
|
(+ (lua-calculate-indentation-left-shift)
|
|
(cdr indentation-info)
|
|
(if (lua-is-continuing-statement-p) (- lua-indent-level) 0)))))
|
|
|
|
(defconst lua-left-shift-regexp-1
|
|
(concat "\\("
|
|
"\\(\\_<" (regexp-opt '("else" "elseif" "until") t)
|
|
"\\_>\\)\\($\\|\\s +\\)"
|
|
"\\)"))
|
|
|
|
(defconst lua-left-shift-regexp-2
|
|
(concat "\\(\\_<"
|
|
(regexp-opt '("end") t)
|
|
"\\_>\\)"))
|
|
|
|
(defconst lua-left-shift-regexp
|
|
;; "else", "elseif", "until" followed by whitespace, or "end"/closing
|
|
;; brackets followed by
|
|
;; whitespace, punctuation, or closing parentheses
|
|
(concat lua-left-shift-regexp-1
|
|
"\\|\\(\\("
|
|
lua-left-shift-regexp-2
|
|
"\\|\\("
|
|
(regexp-opt '("]" "}" ")"))
|
|
"\\)\\)\\($\\|\\(\\s \\|\\s.\\)*\\)"
|
|
"\\)"))
|
|
|
|
(defconst lua-left-shift-pos-1
|
|
2)
|
|
|
|
(defconst lua-left-shift-pos-2
|
|
(+ 3 (regexp-opt-depth lua-left-shift-regexp-1)))
|
|
|
|
(defconst lua-left-shift-pos-3
|
|
(+ lua-left-shift-pos-2
|
|
(regexp-opt-depth lua-left-shift-regexp-2)))
|
|
|
|
(defun lua-calculate-indentation-left-shift (&optional parse-start)
|
|
"Return amount, by which this line should be shifted left.
|
|
Look for an uninterrupted sequence of block-closing tokens that starts
|
|
at the beginning of the line. For each of these tokens, shift indentation
|
|
to the left by the amount specified in lua-indent-level."
|
|
(let (line-begin
|
|
(indentation-modifier 0)
|
|
(case-fold-search nil)
|
|
(block-token nil))
|
|
(save-excursion
|
|
(if parse-start (goto-char parse-start))
|
|
(beginning-of-line)
|
|
(setq line-begin (point))
|
|
;; Look for the block-closing token sequence
|
|
(skip-chars-forward lua-indent-whitespace)
|
|
(catch 'stop
|
|
(while (and (looking-at lua-left-shift-regexp)
|
|
(not (lua-comment-or-string-p)))
|
|
(let ((last-token (or (match-string lua-left-shift-pos-1)
|
|
(match-string lua-left-shift-pos-2)
|
|
(match-string lua-left-shift-pos-3))))
|
|
(if (not block-token) (setq block-token last-token))
|
|
(if (not (string-equal block-token last-token)) (throw 'stop nil))
|
|
(setq indentation-modifier (+ indentation-modifier
|
|
lua-indent-level))
|
|
(forward-char (length (match-string 0))))))
|
|
indentation-modifier)))
|
|
|
|
(defun lua-calculate-indentation (&optional parse-start)
|
|
"Return appropriate indentation for current line as Lua code.
|
|
In usual case returns an integer: the column to indent to."
|
|
(let ((pos (point))
|
|
shift-amt)
|
|
(save-excursion
|
|
(if parse-start (setq pos (goto-char parse-start)))
|
|
(beginning-of-line)
|
|
(setq shift-amt (if (lua-is-continuing-statement-p) lua-indent-level 0))
|
|
(if (bobp) ; If we're at the beginning of the buffer, no change.
|
|
(+ (current-indentation) shift-amt)
|
|
;; This code here searches backwards for a "block beginning/end"
|
|
;; It snarfs the indentation of that, plus whatever amount the
|
|
;; line was shifted left by, because of block end tokens. It
|
|
;; then adds the indentation modifier of that line to obtain the
|
|
;; final level of indentation.
|
|
;; Finally, if this line continues a statement from the
|
|
;; previous line, add another level of indentation.
|
|
(if (lua-backwards-to-block-begin-or-end)
|
|
;; now we're at the line with block beginning or end.
|
|
(max (+ (current-indentation)
|
|
(lua-calculate-indentation-block-modifier)
|
|
shift-amt)
|
|
0)
|
|
;; Failed to find a block begin/end.
|
|
;; Just use the previous line's indent.
|
|
(goto-char pos)
|
|
(beginning-of-line)
|
|
(forward-line -1)
|
|
(+ (current-indentation) shift-amt))))))
|
|
|
|
(defun lua-beginning-of-proc (&optional arg)
|
|
"Move backward to the beginning of a lua proc (or similar).
|
|
With argument, do it that many times. Negative arg -N
|
|
means move forward to Nth following beginning of proc.
|
|
Returns t unless search stops due to beginning or end of buffer."
|
|
(interactive "P")
|
|
(or arg
|
|
(setq arg 1))
|
|
(let ((found nil)
|
|
(ret t))
|
|
(while (< arg 0)
|
|
(if (re-search-forward "^function[ \t]" nil t)
|
|
(setq arg (1+ arg)
|
|
found t)
|
|
(setq ret nil
|
|
arg 0)))
|
|
(if found
|
|
(beginning-of-line))
|
|
(if (> arg 0)
|
|
(if (re-search-forward "^function[ \t]" nil t)
|
|
(setq arg (1+ arg))
|
|
(goto-char (point-max))))
|
|
(while (> arg 0)
|
|
(if (re-search-backward "^function[ \t]" nil t)
|
|
(setq arg (1- arg))
|
|
(setq ret nil
|
|
arg 0)))
|
|
ret))
|
|
|
|
(defun lua-end-of-proc (&optional arg)
|
|
"Move forward to next end of lua proc (or similar).
|
|
With argument, do it that many times. Negative argument -N means move
|
|
back to Nth preceding end of proc.
|
|
|
|
This function just searches for a `end' at the beginning of a line."
|
|
(interactive "P")
|
|
(or arg
|
|
(setq arg 1))
|
|
(let ((found nil)
|
|
(ret t))
|
|
(if (and (< arg 0)
|
|
(not (bolp))
|
|
(save-excursion
|
|
(beginning-of-line)
|
|
(eq (following-char) ?})))
|
|
(forward-char -1))
|
|
(while (> arg 0)
|
|
(if (re-search-forward "^end" nil t)
|
|
(setq arg (1- arg)
|
|
found t)
|
|
(setq ret nil
|
|
arg 0)))
|
|
(while (< arg 0)
|
|
(if (re-search-backward "^end" nil t)
|
|
(setq arg (1+ arg)
|
|
found t)
|
|
(setq ret nil
|
|
arg 0)))
|
|
(if found
|
|
(progn
|
|
(beginning-of-line)
|
|
(forward-line)))
|
|
ret))
|
|
|
|
(defun lua-start-process (name &optional program startfile &rest switches)
|
|
"Start a lua process named NAME, running PROGRAM."
|
|
(or switches
|
|
(setq switches lua-default-command-switches))
|
|
(setq program (or program name))
|
|
(setq lua-process-buffer (apply 'make-comint name program startfile switches))
|
|
(setq lua-process (get-buffer-process lua-process-buffer))
|
|
;; wait for prompt
|
|
(with-current-buffer lua-process-buffer
|
|
(while (not (lua-prompt-line))
|
|
(accept-process-output (get-buffer-process (current-buffer)))
|
|
(goto-char (point-max)))))
|
|
|
|
(defun lua-kill-process ()
|
|
"Kill lua subprocess and its buffer."
|
|
(interactive)
|
|
(if lua-process-buffer
|
|
(kill-buffer lua-process-buffer)))
|
|
|
|
(defun lua-set-lua-region-start (&optional arg)
|
|
"Set start of region for use with `lua-send-lua-region'."
|
|
(interactive)
|
|
(set-marker lua-region-start (or arg (point))))
|
|
|
|
(defun lua-set-lua-region-end (&optional arg)
|
|
"Set end of region for use with `lua-send-lua-region'."
|
|
(interactive)
|
|
(set-marker lua-region-end (or arg (point))))
|
|
|
|
(defun lua-send-current-line ()
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"Send current line to lua subprocess, found in `lua-process'.
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If `lua-process' is nil or dead, start a new process first."
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(interactive)
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(let ((start (save-excursion (beginning-of-line) (point)))
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(end (save-excursion (end-of-line) (point))))
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(lua-send-region start end)))
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(defun lua-send-region (start end)
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"Send region to lua subprocess."
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(interactive "r")
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;; make temporary lua file
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(let ((tempfile (lua-make-temp-file "lua-"))
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(last-prompt nil)
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(prompt-found nil)
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(lua-stdin-line-offset (count-lines (point-min) start))
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(lua-stdin-buffer (current-buffer))
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current-prompt )
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(write-region start end tempfile)
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(or (and lua-process
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(comint-check-proc lua-process-buffer))
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(lua-start-process lua-default-application))
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;; kill lua process without query
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(if (fboundp 'process-kill-without-query)
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(process-kill-without-query lua-process))
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;; send dofile(tempfile)
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(with-current-buffer lua-process-buffer
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(goto-char (point-max))
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(setq last-prompt (point-max))
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(comint-simple-send (get-buffer-process (current-buffer))
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(format "dofile(\"%s\")"
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(replace-regexp-in-string "\\\\" "\\\\\\\\" tempfile)))
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;; wait for prompt
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(while (not prompt-found)
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(accept-process-output (get-buffer-process (current-buffer)))
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(goto-char (point-max))
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(setq prompt-found (and (lua-prompt-line) (< last-prompt (point-max)))))
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;; remove temp. lua file
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(delete-file tempfile)
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(lua-postprocess-output-buffer lua-process-buffer last-prompt lua-stdin-line-offset)
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(if lua-always-show
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(display-buffer lua-process-buffer)))))
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(defun lua-postprocess-output-buffer (buf start &optional lua-stdin-line-offset)
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"Highlight tracebacks found in buf. If an traceback occurred return
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t, otherwise return nil. BUF must exist."
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(let ((lua-stdin-line-offset (or lua-stdin-line-offset 0))
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line file bol err-p)
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(save-excursion
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(set-buffer buf)
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(goto-char start)
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(beginning-of-line)
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(if (re-search-forward lua-traceback-line-re nil t)
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(setq file (match-string 1)
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line (string-to-number (match-string 2)))))
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(when (and lua-jump-on-traceback line)
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(beep)
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;; FIXME: highlight
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(lua-jump-to-traceback file line lua-stdin-line-offset)
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(setq err-p t))
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err-p))
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(defun lua-jump-to-traceback (file line lua-stdin-line-offset)
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"Jump to the Lua code in FILE at LINE."
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;; sanity check: temporary-file-directory
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(if (string= (substring file 0 3) "...")
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(message "Lua traceback output truncated: customize 'temporary-file-directory' or increase 'LUA_IDSIZE' in 'luaconf.h'.")
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(let ((buffer (cond ((or (string-equal file tempfile) (string-equal file "stdin"))
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(setq line (+ line lua-stdin-line-offset))
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lua-stdin-buffer)
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(t (find-file-noselect file)))))
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(pop-to-buffer buffer)
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|
;; Force Lua mode
|
|
(if (not (eq major-mode 'lua-mode))
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|
(lua-mode))
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;; FIXME: fix offset when executing region
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(goto-line line)
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(message "Jumping to error in file %s on line %d" file line))))
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|
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(defun lua-prompt-line ()
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(save-excursion
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(save-match-data
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(forward-line 0)
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(if (looking-at comint-prompt-regexp)
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(match-end 0)))))
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|
|
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(defun lua-send-lua-region ()
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"Send preset lua region to lua subprocess."
|
|
(interactive)
|
|
(or (and lua-region-start lua-region-end)
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|
(error "lua-region not set"))
|
|
(or (and lua-process
|
|
(comint-check-proc lua-process-buffer))
|
|
(lua-start-process lua-default-application))
|
|
(comint-simple-send lua-process
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|
(buffer-substring lua-region-start lua-region-end)
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|
)
|
|
(if lua-always-show
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|
(display-buffer lua-process-buffer)))
|
|
|
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(defun lua-send-proc ()
|
|
"Send proc around point to lua subprocess."
|
|
(interactive)
|
|
(let (beg end)
|
|
(save-excursion
|
|
(lua-beginning-of-proc)
|
|
(setq beg (point))
|
|
(lua-end-of-proc)
|
|
(setq end (point)))
|
|
(or (and lua-process
|
|
(comint-check-proc lua-process-buffer))
|
|
(lua-start-process lua-default-application))
|
|
(comint-simple-send lua-process
|
|
(buffer-substring beg end))
|
|
(if lua-always-show
|
|
(display-buffer lua-process-buffer))))
|
|
|
|
;; FIXME: This needs work... -Bret
|
|
(defun lua-send-buffer ()
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|
"Send whole buffer to lua subprocess."
|
|
(interactive)
|
|
(lua-send-region (point-min) (point-max)))
|
|
|
|
(defun lua-restart-with-whole-file ()
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|
"Restart lua subprocess and send whole file as input."
|
|
(interactive)
|
|
(lua-kill-process)
|
|
(lua-start-process lua-default-application)
|
|
(lua-send-buffer))
|
|
|
|
(defun lua-show-process-buffer ()
|
|
"Make sure `lua-process-buffer' is being displayed."
|
|
(interactive)
|
|
(display-buffer lua-process-buffer))
|
|
|
|
(defun lua-hide-process-buffer ()
|
|
"Delete all windows that display `lua-process-buffer'."
|
|
(interactive)
|
|
(delete-windows-on lua-process-buffer))
|
|
|
|
(defun lua-search-documentation ()
|
|
"Search Lua documentation for the word at the point."
|
|
(interactive)
|
|
(browse-url (concat lua-search-url-prefix (current-word t))))
|
|
|
|
(defun lua-calculate-state (arg prevstate)
|
|
;; Calculate the new state of PREVSTATE, t or nil, based on arg. If
|
|
;; arg is nil or zero, toggle the state. If arg is negative, turn
|
|
;; the state off, and if arg is positive, turn the state on
|
|
(if (or (not arg)
|
|
(zerop (setq arg (prefix-numeric-value arg))))
|
|
(not prevstate)
|
|
(> arg 0)))
|
|
|
|
(defun lua-toggle-electric-state (&optional arg)
|
|
"Toggle the electric indentation feature.
|
|
Optional numeric ARG, if supplied, turns on electric indentation when
|
|
positive, turns it off when negative, and just toggles it when zero or
|
|
left out."
|
|
(interactive "P")
|
|
(setq lua-electric-flag (lua-calculate-state arg lua-electric-flag)))
|
|
|
|
(defun lua-forward-sexp (&optional count)
|
|
"Forward to block end"
|
|
(interactive "p")
|
|
(save-match-data
|
|
(let* ((count (or count 1))
|
|
(stackheight 0)
|
|
(block-start (mapcar 'car lua-sexp-alist))
|
|
(block-end (mapcar 'cdr lua-sexp-alist))
|
|
(block-regex (regexp-opt (append block-start block-end) 'words))
|
|
current-exp
|
|
)
|
|
(while (> count 0)
|
|
;; skip whitespace
|
|
(skip-chars-forward " \t\n")
|
|
(if (looking-at (regexp-opt block-start 'words))
|
|
(let ((keyword (match-string 1)))
|
|
(lua-find-matching-token-word keyword nil))
|
|
;; If the current keyword is not a "begin" keyword, then just
|
|
;; perform the normal forward-sexp.
|
|
(forward-sexp 1))
|
|
(setq count (1- count))))))
|
|
|
|
|
|
;; menu bar
|
|
|
|
(define-key lua-mode-menu [restart-with-whole-file]
|
|
'("Restart With Whole File" . lua-restart-with-whole-file))
|
|
(define-key lua-mode-menu [kill-process]
|
|
'("Kill Process" . lua-kill-process))
|
|
|
|
(define-key lua-mode-menu [hide-process-buffer]
|
|
'("Hide Process Buffer" . lua-hide-process-buffer))
|
|
(define-key lua-mode-menu [show-process-buffer]
|
|
'("Show Process Buffer" . lua-show-process-buffer))
|
|
|
|
(define-key lua-mode-menu [end-of-proc]
|
|
'("End Of Proc" . lua-end-of-proc))
|
|
(define-key lua-mode-menu [beginning-of-proc]
|
|
'("Beginning Of Proc" . lua-beginning-of-proc))
|
|
|
|
(define-key lua-mode-menu [send-lua-region]
|
|
'("Send Lua-Region" . lua-send-lua-region))
|
|
(define-key lua-mode-menu [set-lua-region-end]
|
|
'("Set Lua-Region End" . lua-set-lua-region-end))
|
|
(define-key lua-mode-menu [set-lua-region-start]
|
|
'("Set Lua-Region Start" . lua-set-lua-region-start))
|
|
|
|
(define-key lua-mode-menu [send-current-line]
|
|
'("Send Current Line" . lua-send-current-line))
|
|
(define-key lua-mode-menu [send-region]
|
|
'("Send Region" . lua-send-region))
|
|
(define-key lua-mode-menu [send-proc]
|
|
'("Send Proc" . lua-send-proc))
|
|
(define-key lua-mode-menu [send-buffer]
|
|
'("Send Buffer" . lua-send-buffer))
|
|
(define-key lua-mode-menu [search-documentation]
|
|
'("Search Documentation" . lua-search-documentation))
|
|
|
|
(provide 'lua-mode)
|
|
|
|
|
|
;;; lua-mode.el ends here
|