From 6fd3cd42e01d3c2bd8bbf9aa1629451ea4c8955e Mon Sep 17 00:00:00 2001 From: Chris Wanstrath Date: Tue, 17 May 2011 17:14:08 -0700 Subject: [PATCH] lua! --- defunkt/lua.el | 33 ++ defunkt/modes.el | 1 + vendor/lua-mode.el | 1151 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1185 insertions(+) create mode 100644 defunkt/lua.el create mode 100644 vendor/lua-mode.el diff --git a/defunkt/lua.el b/defunkt/lua.el new file mode 100644 index 00000000..6446324e --- /dev/null +++ b/defunkt/lua.el @@ -0,0 +1,33 @@ +;; use an indentation width of two spaces +(setq lua-indent-level 2) + +;; Add dangling '(', remove '=' +;; (setq 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 *\\="))) + +;; (defun lua-calculate-indentation (&optional parse-start) +;; "Overwrites the default lua-mode function that calculates the +;; column to which the current line should be indented to." +;; (save-excursion +;; (when parse-start +;; (goto-char parse-start)) + +;; ;; We calculate the indentation column depending on the previous +;; ;; non-blank, non-comment code line. Also, when the current line +;; ;; is a continuation of that previous line, we add one additional +;; ;; unit of indentation. +;; (+ (if (lua-is-continuing-statement-p) lua-indent-level 0) +;; (if (lua-goto-nonblank-previous-line) +;; (+ (current-indentation) (lua-calculate-indentation-right-shift-next)) +;; 0)))) + +;; (defun lua-calculate-indentation-right-shift-next (&optional parse-start) \ No newline at end of file diff --git a/defunkt/modes.el b/defunkt/modes.el index 1de81726..b43d4d1b 100644 --- a/defunkt/modes.el +++ b/defunkt/modes.el @@ -11,6 +11,7 @@ (load "defunkt/coffee") (load "defunkt/markdown") (load "defunkt/css") +(load "defunkt/lua") ;; all modes (add-hook 'before-save-hook 'delete-trailing-whitespace) diff --git a/vendor/lua-mode.el b/vendor/lua-mode.el new file mode 100644 index 00000000..6fce1e0c --- /dev/null +++ b/vendor/lua-mode.el @@ -0,0 +1,1151 @@ +;;; lua-mode.el --- a major-mode for editing Lua scripts + +;; Copyright (C) 1997, 2001, 2004, 2006, 2007, 2010, 2011 Free Software Foundation, Inc. + +;; Author: 2010-2011 Reuben Thomas +;; 2006 Juergen Hoetzel +;; 2004 various (support for Lua 5 and byte compilation) +;; 2001 Christian Vogler +;; 1997 Bret Mogilefsky starting from +;; tcl-mode by Gregor Schmid +;; with tons of assistance from +;; Paul Du Bois and +;; Aaron Smith . +;; URL: http://lua-mode.luaforge.net/ +;; Version: 20110121 +;; This file is NOT part of Emacs. +;; +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the GNU General Public License +;; as published by the Free Software Foundation; either version 2 +;; of the License, or (at your option) any later version. +;; +;; This program is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with this program; if not, write to the Free Software +;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, +;; MA 02110-1301, USA. + +;; Keywords: languages, processes, tools + + +;;; Commentary: + +;; Thanks to Tobias Polzin for function indenting +;; patch: Indent "(" like "{" + +;; Thanks to Fabien for imenu patches. + +;; Thanks to Simon Marshall and Olivier +;; Andrieu for font-lock patches. + +;; Additional font-lock highlighting and indentation tweaks by +;; Adam D. Moss . + +;; INSTALLATION: + +;; To install, just copy this file into a directory on your load-path +;; (and byte-compile it). To set up Emacs to automatically edit files +;; ending in ".lua" or with a lua hash-bang line using lua-mode add +;; the following to your init file: +;; +;; (autoload 'lua-mode "lua-mode" "Lua editing mode." t) +;; (add-to-list 'auto-mode-alist '("\\.lua$" . lua-mode)) +;; (add-to-list 'interpreter-mode-alist '("lua" . lua-mode)) + +;; Usage + +;; Lua-mode supports c-mode style formatting and sending of +;; lines/regions/files to a Lua interpreter. An interpreter (see +;; variable `lua-default-application') will be started if you try to +;; send some code and none is running. You can use the process-buffer +;; (named after the application you chose) as if it were an +;; interactive shell. See the documentation for `comint.el' for +;; details. + +;; Lua-mode works with Hide Show minor mode (see ``hs-minor-mode``). + +;; Key-bindings + +;; To see all the keybindings for Lua mode, look at `lua-setup-keymap' +;; or start `lua-mode' and type `\C-h m'. +;; The keybindings may seem strange, since I prefer to use them with +;; lua-prefix-key set to nil, but since those keybindings are already used +;; the default for `lua-prefix-key' is `\C-c', which is the conventional +;; prefix for major-mode commands. + +;; You can customise the keybindings either by setting `lua-prefix-key' +;; or by putting the following in your .emacs +;; (setq lua-mode-map (make-sparse-keymap)) +;; and +;; (define-key lua-mode-map ) +;; for all the functions you need. + + +;;; Code: +(require 'comint) + +;; Local variables +(defgroup lua nil + "Major mode for editing lua code." + :prefix "lua-" + :group 'languages) + +(defcustom lua-indent-level 3 + "Amount by which Lua subexpressions are indented." + :type 'integer + :group 'lua) + +(defcustom lua-comment-start "-- " + "Default value of `comment-start'." + :type 'string + :group 'lua) + +(defcustom lua-comment-start-skip "-- " + "Default value of `comment-start-skip'." + :type 'string + :group 'lua) + +(defcustom lua-default-application "lua" + "Default application to run in lua subprocess." + :type 'string + :group 'lua) + +(defcustom lua-default-command-switches (list "-i") + "Command switches for `lua-default-application'. +Should be a list of strings." + :type '(repeat string) + :group 'lua) + +(defcustom lua-always-show t + "*Non-nil means display lua-process-buffer after sending a command." + :type 'boolean + :group 'lua) + +(defcustom lua-search-url-prefix "http://www.lua.org/manual/5.1/manual.html#pdf-" + "*URL at which to search for documentation on a word" + :type 'string + :group 'lua) + +(defvar lua-process nil + "The active Lua subprocess") + +(defvar lua-process-buffer nil + "Buffer used for communication with Lua subprocess") + +(defvar lua-mode-map nil + "Keymap used with lua-mode.") + +(defvar lua-electric-flag t + "If t, electric actions (like automatic reindentation) will happen when an electric + key like `{' is pressed") +(make-variable-buffer-local 'lua-electric-flag) + +(defcustom lua-prefix-key "\C-c" + "Prefix for all lua-mode commands." + :type 'string + :group 'lua) + +(defcustom lua-prompt-regexp "[^\n]*\\(>[\t ]+\\)+$" + "Regexp which matches the Lua program's prompt." + :type 'regexp + :group 'lua) + +(defcustom lua-traceback-line-re + "^\\(?:[\t ]*\\|.*>[\t ]+\\)\\([^\n\t ]+\\):\\([0-9]+\\):" + "Regular expression that describes tracebacks and errors." + :type 'regexp + :group 'lua) + +(defcustom lua-jump-on-traceback t + "*Jump to innermost traceback location in *lua* buffer. When this +variable is non-nil and a traceback occurs when running Lua code in a +subprocess, jump immediately to the source code of the innermost +traceback location." + :type 'boolean + :group 'lua) + +(defvar lua-mode-hook nil + "Hooks called when Lua mode fires up.") + +(defvar lua-region-start (make-marker) + "Start of special region for Lua communication.") + +(defvar lua-region-end (make-marker) + "End of special region for Lua communication.") + +(defvar lua-mode-menu (make-sparse-keymap "Lua") + "Keymap for lua-mode's menu.") + +(defvar lua-emacs-menu + '(["Restart With Whole File" lua-restart-with-whole-file t] + ["Kill Process" lua-kill-process t] + ["Hide Process Buffer" lua-hide-process-buffer t] + ["Show Process Buffer" lua-show-process-buffer t] + ["Beginning Of Proc" lua-beginning-of-proc t] + ["End Of Proc" lua-end-of-proc t] + ["Set Lua-Region Start" lua-set-lua-region-start t] + ["Set Lua-Region End" lua-set-lua-region-end t] + ["Send Lua-Region" lua-send-lua-region t] + ["Send Current Line" lua-send-current-line t] + ["Send Region" lua-send-region t] + ["Send Proc" lua-send-proc t] + ["Send Buffer" lua-send-buffer t] + ["Search Documentation" lua-search-documentation t]) + "Emacs menu for Lua mode.") + +(defvar lua-font-lock-keywords + (eval-when-compile + (list + ;; Handle variable names + ;; local blalba = + ;; ^^^^^^ + '("\\(local[ \t]+\\(\\sw+\\)[ \t]*=\\)" + (2 font-lock-variable-name-face)) + + ;; Function name declarations. + '("^[ \t]*\\_<\\(\\(local[ \t]+\\)?function\\)\\_>[ \t]+\\(\\(\\sw:\\|\\sw\\.\\|\\sw_\\|\\sw\\)+\\)" + (1 font-lock-keyword-face) (3 font-lock-function-name-face nil t)) + + ;; Handle function names in assignments + '("\\(\\(\\sw:\\|\\sw\\.\\|\\sw_\\|\\sw\\)+\\)[ \t]*=[ \t]*\\(function\\)\\_>" + (1 font-lock-function-name-face nil t) (3 font-lock-keyword-face)) + + ;; Multi-line string literals. + '("[^-]\\[=*\\[\\(\\([^]]\\|][^]]\\|]=+[^]]\\)*?\\)]=*]" + (1 font-lock-string-face t)) + + ;; Keywords. + (concat "\\_<" + (regexp-opt '("and" "break" "do" "else" "elseif" "end" "false" + "for" "function" "if" "in" "local" "nil" "not" + "or" "repeat" "return" "then" "true" "until" + "while") t) + "\\_>") + + "Default expressions to highlight in Lua mode."))) + +(defvar lua-imenu-generic-expression + '((nil "^[ \t]*\\(?:local[ \t]+\\)?function[ \t]+\\(\\(\\sw:\\|\\sw_\\|\\sw\\.\\|\\sw\\)+\\)" 1)) + "Imenu generic expression for lua-mode. See `imenu-generic-expression'.") + +(defvar lua-mode-abbrev-table nil + "Abbreviation table used in lua-mode buffers.") + +(defvar lua-sexp-alist '(("then" . "end") + ("function" . "end") + ("do" . "end"))) + +(define-abbrev-table 'lua-mode-abbrev-table + '( + ("end" "end" lua-indent-line 0) + ("else" "else" lua-indent-line 0) + ("elseif" "elseif" lua-indent-line 0) + )) + +(defconst lua-indent-whitespace " \t" + "Character set that constitutes whitespace for indentation in lua.") + +(eval-and-compile + (defalias 'lua-make-temp-file + (if (fboundp 'make-temp-file) + 'make-temp-file + (lambda (prefix &optional dir-flag) ;; Simple implementation + (expand-file-name + (make-temp-name prefix) + (if (fboundp 'temp-directory) + (temp-directory) + temporary-file-directory)))))) + +;;;###autoload +(defun lua-mode () + "Major mode for editing Lua code. +The following keys are bound: +\\{lua-mode-map} +" + (interactive) + (let ((switches nil) + s) + (kill-all-local-variables) + (setq major-mode 'lua-mode) + (setq mode-name "Lua") + (setq comint-prompt-regexp lua-prompt-regexp) + (make-local-variable 'lua-default-command-switches) + (set (make-local-variable 'indent-line-function) 'lua-indent-line) + (set (make-local-variable 'comment-start) lua-comment-start) + (set (make-local-variable 'comment-start-skip) lua-comment-start-skip) + (set (make-local-variable 'font-lock-defaults) + '(lua-font-lock-keywords + nil nil ((?_ . "w")))) + (set (make-local-variable 'imenu-generic-expression) + lua-imenu-generic-expression) + (setq local-abbrev-table lua-mode-abbrev-table) + (abbrev-mode 1) + (make-local-variable 'lua-default-eval) + (or lua-mode-map + (lua-setup-keymap)) + (use-local-map lua-mode-map) + (set-syntax-table (copy-syntax-table)) + (modify-syntax-entry ?+ ".") + (modify-syntax-entry ?- ". 12") + (modify-syntax-entry ?* ".") + (modify-syntax-entry ?/ ".") + (modify-syntax-entry ?^ ".") + ;; This might be better as punctuation, as for C, but this way you + ;; can treat table index as symbol. + (modify-syntax-entry ?. "_") ; e.g. `io.string' + (modify-syntax-entry ?> ".") + (modify-syntax-entry ?< ".") + (modify-syntax-entry ?= ".") + (modify-syntax-entry ?~ ".") + (modify-syntax-entry ?\n ">") + (modify-syntax-entry ?\' "\"") + (modify-syntax-entry ?\" "\"") + (if (and (featurep 'menubar) + current-menubar + (not (assoc "Lua" current-menubar))) + (progn + (set-buffer-menubar (copy-sequence current-menubar)) + (add-menu nil "Lua" lua-emacs-menu))) + ;; Append Lua menu to popup menu for Emacs. + (if (boundp 'mode-popup-menu) + (setq mode-popup-menu + (cons (concat mode-name " Mode Commands") lua-emacs-menu))) + + ;; hideshow setup + (unless (assq 'lua-mode hs-special-modes-alist) + (add-to-list 'hs-special-modes-alist + `(lua-mode + ,(regexp-opt (mapcar 'car lua-sexp-alist) 'words) ;start + ,(regexp-opt (mapcar 'cdr lua-sexp-alist) 'words) ;end + nil lua-forward-sexp))) + (run-hooks 'lua-mode-hook))) + +;;;###autoload +(add-to-list 'auto-mode-alist '("\\.lua$" . lua-mode)) + +(defun lua-setup-keymap () + "Set up keymap for Lua mode. +If the variable `lua-prefix-key' is nil, the bindings go directly +to `lua-mode-map', otherwise they are prefixed with `lua-prefix-key'." + (setq lua-mode-map (make-sparse-keymap)) + (define-key lua-mode-map [menu-bar lua-mode] + (cons "Lua" lua-mode-menu)) + (define-key lua-mode-map "}" 'lua-electric-match) + (define-key lua-mode-map "]" 'lua-electric-match) + (define-key lua-mode-map ")" 'lua-electric-match) + (define-key lua-mode-map (kbd "C-M-a") 'lua-beginning-of-proc) + (define-key lua-mode-map (kbd "C-M-e") 'lua-end-of-proc) + (define-key lua-mode-map (kbd "C-M-") 'lua-beginning-of-proc) + (define-key lua-mode-map (kbd "C-M-") 'lua-end-of-proc) + (let ((map (if lua-prefix-key + (make-sparse-keymap) + lua-mode-map))) + + ;; communication + (define-key map "\C-l" 'lua-send-buffer) + (define-key map "\C-f" 'lua-search-documentation) + (if lua-prefix-key + (define-key lua-mode-map lua-prefix-key map)) + )) + +(defun lua-electric-match (arg) + "Insert character and adjust indentation." + (interactive "P") + (insert-char last-command-char (prefix-numeric-value arg)) + (if lua-electric-flag + (lua-indent-line)) + (blink-matching-open)) + +;; private functions +(defun lua-syntax-status () + "Returns the syntactic status of the character after the point." + (parse-partial-sexp (save-excursion (beginning-of-line) (point)) + (point))) + + +(defun lua-string-p () + "Returns true if the point is in a string." + (elt (lua-syntax-status) 3)) + +(defun lua-comment-p () + "Returns true if the point is in a comment." + (elt (lua-syntax-status) 4)) + +(defun lua-comment-or-string-p () + "Returns true if the point is in a comment or string." + (let ((parse-result (lua-syntax-status))) + (or (elt parse-result 3) (elt parse-result 4)))) + +(defun lua-indent-line () + "Indent current line for Lua mode. +Return the amount the indentation changed by." + (let ((indent (max 0 (- (lua-calculate-indentation nil) + (lua-calculate-indentation-left-shift)))) + beg shift-amt + (case-fold-search nil) + (pos (- (point-max) (point)))) + (beginning-of-line) + (setq beg (point)) + (skip-chars-forward lua-indent-whitespace) + (setq shift-amt (- indent (current-column))) + (when (not (zerop shift-amt)) + (delete-region beg (point)) + (indent-to indent)) + ;; If initial point was within line's indentation, + ;; position after the indentation. Else stay at same point in text. + (if (> (- (point-max) pos) (point)) + (goto-char (- (point-max) pos))) + shift-amt + indent)) + +(defun lua-find-regexp (direction regexp &optional limit ignore-p) + "Searches for a regular expression in the direction specified. +Direction is one of 'forward and 'backward. +By default, matches in comments and strings are ignored, but what to ignore is +configurable by specifying ignore-p. If the regexp is found, returns point +position, nil otherwise. +ignore-p returns true if the match at the current point position should be +ignored, nil otherwise." + (let ((ignore-func (or ignore-p 'lua-comment-or-string-p)) + (search-func (if (eq direction 'forward) + 're-search-forward 're-search-backward)) + (case-fold-search nil)) + (catch 'found + (while (funcall search-func regexp limit t) + (if (not (funcall ignore-func)) + (throw 'found (point))))))) + +(defun lua-backwards-to-block-begin-or-end () + "Move backwards to nearest block begin or end. Returns nil if not successful." + (interactive) + (lua-find-regexp 'backward lua-block-regexp)) + +(defconst lua-block-regexp + (eval-when-compile + (concat + "\\(\\_<" + (regexp-opt '("do" "function" "repeat" "then" + "else" "elseif" "end" "until") t) + "\\_>\\)\\|" + (regexp-opt '("{" "(" "[" "]" ")" "}") t)) + + )) + +(defconst lua-block-token-alist + ;; The absence of "else" is deliberate. This construct in a way both + ;; opens and closes a block. As a result, it is difficult to handle + ;; cleanly. It is also ambiguous - if we are looking for the match + ;; of "else", should we look backward for "then/elseif" or forward + ;; for "end"? + ;; Maybe later we will find a way to handle it. + '(("do" "\\_" open) + ("function" "\\_" open) + ("repeat" "\\_" open) + ("then" "\\_<\\(e\\(lseif\\|nd\\)\\)\\_>" open) + ("{" "}" open) + ("[" "]" open) + ("(" ")" open) + ("elseif" "\\_" close) + ("end" "\\_<\\(do\\|function\\|then\\)\\_>" close) + ("until" "\\_" close) + ("}" "{" close) + ("]" "\\[" close) + (")" "(" close))) + + +(defconst lua-indentation-modifier-regexp + ;; The absence of else is deliberate, since it does not modify the + ;; indentation level per se. It only may cause the line, in which the + ;; else is, to be shifted to the left. + (concat + "\\(\\_<" + ;; 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 "\\_") + (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 () + "Send current line to lua subprocess, found in `lua-process'. +If `lua-process' is nil or dead, start a new process first." + (interactive) + (let ((start (save-excursion (beginning-of-line) (point))) + (end (save-excursion (end-of-line) (point)))) + (lua-send-region start end))) + +(defun lua-send-region (start end) + "Send region to lua subprocess." + (interactive "r") + ;; make temporary lua file + (let ((tempfile (lua-make-temp-file "lua-")) + (last-prompt nil) + (prompt-found nil) + (lua-stdin-line-offset (count-lines (point-min) start)) + (lua-stdin-buffer (current-buffer)) + current-prompt ) + (write-region start end tempfile) + (or (and lua-process + (comint-check-proc lua-process-buffer)) + (lua-start-process lua-default-application)) + ;; kill lua process without query + (if (fboundp 'process-kill-without-query) + (process-kill-without-query lua-process)) + ;; send dofile(tempfile) + (with-current-buffer lua-process-buffer + (goto-char (point-max)) + (setq last-prompt (point-max)) + (comint-simple-send (get-buffer-process (current-buffer)) + (format "dofile(\"%s\")" + (replace-regexp-in-string "\\\\" "\\\\\\\\" tempfile))) + ;; wait for prompt + (while (not prompt-found) + (accept-process-output (get-buffer-process (current-buffer))) + (goto-char (point-max)) + (setq prompt-found (and (lua-prompt-line) (< last-prompt (point-max))))) + ;; remove temp. lua file + (delete-file tempfile) + (lua-postprocess-output-buffer lua-process-buffer last-prompt lua-stdin-line-offset) + (if lua-always-show + (display-buffer lua-process-buffer))))) + +(defun lua-postprocess-output-buffer (buf start &optional lua-stdin-line-offset) + "Highlight tracebacks found in buf. If an traceback occurred return +t, otherwise return nil. BUF must exist." + (let ((lua-stdin-line-offset (or lua-stdin-line-offset 0)) + line file bol err-p) + (save-excursion + (set-buffer buf) + (goto-char start) + (beginning-of-line) + (if (re-search-forward lua-traceback-line-re nil t) + (setq file (match-string 1) + line (string-to-number (match-string 2))))) + (when (and lua-jump-on-traceback line) + (beep) + ;; FIXME: highlight + (lua-jump-to-traceback file line lua-stdin-line-offset) + (setq err-p t)) + err-p)) + +(defun lua-jump-to-traceback (file line lua-stdin-line-offset) + "Jump to the Lua code in FILE at LINE." + ;; sanity check: temporary-file-directory + (if (string= (substring file 0 3) "...") + (message "Lua traceback output truncated: customize 'temporary-file-directory' or increase 'LUA_IDSIZE' in 'luaconf.h'.") + (let ((buffer (cond ((or (string-equal file tempfile) (string-equal file "stdin")) + (setq line (+ line lua-stdin-line-offset)) + lua-stdin-buffer) + (t (find-file-noselect file))))) + (pop-to-buffer buffer) + ;; Force Lua mode + (if (not (eq major-mode 'lua-mode)) + (lua-mode)) + ;; FIXME: fix offset when executing region + (goto-line line) + (message "Jumping to error in file %s on line %d" file line)))) + +(defun lua-prompt-line () + (save-excursion + (save-match-data + (forward-line 0) + (if (looking-at comint-prompt-regexp) + (match-end 0))))) + +(defun lua-send-lua-region () + "Send preset lua region to lua subprocess." + (interactive) + (or (and lua-region-start lua-region-end) + (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 + (buffer-substring lua-region-start lua-region-end) + ) + (if lua-always-show + (display-buffer lua-process-buffer))) + +(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 () + "Send whole buffer to lua subprocess." + (interactive) + (lua-send-region (point-min) (point-max))) + +(defun lua-restart-with-whole-file () + "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