mirror of
https://github.com/joaotavora/yasnippet.git
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1333 lines
49 KiB
EmacsLisp
1333 lines
49 KiB
EmacsLisp
;;; yasnippet.el --- Yet another snippet extension for Emacs.
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;; Copyright 2008 pluskid
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;;
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;; Author: pluskid <pluskid@gmail.com>
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;; Version: 0.5.6 XXX: Change this
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;; X-URL: http://code.google.com/p/yasnippet/
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;; This file is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; This file 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Basic steps to setup:
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;; 1. Place `yasnippet.el' in your `load-path'.
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;; 2. In your .emacs file:
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;; (require 'yasnippet)
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;; 3. Place the `snippets' directory somewhere. E.g: ~/.emacs.d/snippets
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;; 4. In your .emacs file
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;; (yas/initialize)
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;; (yas/load-directory "~/.emacs.d/snippets")
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;;
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;; For more information and detailed usage, refer to the project page:
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;; http://code.google.com/p/yasnippet/
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(require 'cl)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User customizable variables
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar yas/dont-activate nil
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"If set to t, don't activate yas/minor-mode automatically.")
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(make-variable-buffer-local 'yas/dont-activate)
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(defvar yas/key-syntaxes (list "w" "w_" "w_." "^ ")
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"A list of syntax of a key. This list is tried in the order
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to try to find a key. For example, if the list is '(\"w\" \"w_\").
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And in emacs-lisp-mode, where \"-\" has the syntax of \"_\":
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foo-bar
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will first try \"bar\", if not found, then \"foo-bar\" is tried.")
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(defvar yas/root-directory nil
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"The (list of) root directory that stores the snippets for each
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major modes.")
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(defvar yas/indent-line t
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"Each (except the 1st) line of the snippet template is indented to
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current column if this variable is non-`nil'.")
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(make-variable-buffer-local 'yas/indent-line)
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(defvar yas/trigger-key (kbd "<tab>")
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"The key to bind as a trigger of snippet.")
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(defvar yas/next-field-key (kbd "<tab>")
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"The key to navigate to next field.")
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(defvar yas/clear-field-key (kbd "C-d")
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"The key to clear the currently active field.")
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(defvar yas/keymap (make-sparse-keymap)
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"The keymap of snippet.")
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(define-key yas/keymap yas/next-field-key 'yas/next-field)
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(define-key yas/keymap yas/clear-field-key 'yas/clear-field)
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(define-key yas/keymap (kbd "S-TAB") 'yas/prev-field)
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(define-key yas/keymap (kbd "<DEL>") 'yas/prev-field)
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(define-key yas/keymap (kbd "DEL") 'yas/prev-field)
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(define-key yas/keymap (kbd "<deletechar>") 'yas/prev-field)
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(define-key yas/keymap (kbd "<S-iso-lefttab>") 'yas/prev-field)
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(define-key yas/keymap (kbd "<S-tab>") 'yas/prev-field)
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(define-key yas/keymap (kbd "<backtab>") 'yas/prev-field)
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(defvar yas/show-all-modes-in-menu nil
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"Currently yasnippet only all \"real modes\" to menubar. For
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example, you define snippets for \"cc-mode\" and make it the
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parent of `c-mode', `c++-mode' and `java-mode'. There's really
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no such mode like \"cc-mode\". So we don't show it in the yasnippet
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menu to avoid the menu becoming too big with strange modes. The
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snippets defined for \"cc-mode\" can still be accessed from
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menu-bar->c-mode->parent (or c++-mode, java-mode, all are ok).
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However, if you really like to show all modes in the menu, set
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this variable to t.")
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(defvar yas/use-menu t
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"If this is set to `t', all snippet template of the current
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mode will be listed under the menu \"yasnippet\".")
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(defvar yas/trigger-symbol " =>"
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"The text that will be used in menu to represent the trigger.")
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(defface yas/field-highlight-face
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'((((class color) (background light)) (:background "DarkSeaGreen1"))
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(t (:background "DimGrey")))
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"The face used to highlight the currently active field of a snippet")
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(defface yas/mirror-highlight-face
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'((((class color) (background light)) (:background "Dodgerblue"))
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(t (:background "DimGrey")))
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"The face used to highlight a mirror of a snippet")
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(defface yas/field-debug-face
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'((((class color) (background light)) (:background "tomato"))
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(t (:background "tomato")))
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"The face used for debugging")
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(defvar yas/window-system-popup-function #'yas/dropdown-list-popup-for-template
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"When there's multiple candidate for a snippet key. This function
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is called to let user select one of them. `yas/text-popup-function'
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is used instead when not in a window system.")
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(defvar yas/text-popup-function #'yas/dropdown-list-popup-for-template
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"When there's multiple candidate for a snippet key. If not in a
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window system, this function is called to let user select one of
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them. `yas/window-system-popup-function' is used instead when in
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a window system.")
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(defvar yas/extra-mode-hooks
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'()
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"A list of mode-hook that should be hooked to enable yas/minor-mode.
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Most modes need no special consideration. Some mode (like `ruby-mode')
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doesn't call `after-change-major-mode-hook' need to be hooked explicitly.")
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(mapc '(lambda (x)
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(add-to-list 'yas/extra-mode-hooks
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x))
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'(ruby-mode-hook actionscript-mode-hook ox-mode-hook python-mode-hook))
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(defvar yas/after-exit-snippet-hook
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'()
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"Hooks to run after a snippet exited.
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The hooks will be run in an environment where some variables bound to
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proper values:
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* yas/snippet-beg : The beginning of the region of the snippet.
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* yas/snippet-end : Similar to beg.")
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(defvar yas/before-expand-snippet-hook
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'()
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"Hooks to run after a before expanding a snippet.")
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(defvar yas/buffer-local-condition
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'(if (and (not (bobp))
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(or (equal "font-lock-comment-face"
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(get-char-property (1- (point))
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'face))
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(equal "font-lock-string-face"
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(get-char-property (1- (point))
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'face))))
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'(require-snippet-condition . force-in-comment)
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t)
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"Condition to yasnippet local to each buffer.
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* If yas/buffer-local-condition evaluate to nil, snippet
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won't be expanded.
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* If it evaluate to the a cons cell where the car is the
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symbol require-snippet-condition and the cdr is a
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symbol (let's call it requirement):
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* If the snippet has no condition, then it won't be
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expanded.
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* If the snippet has a condition but evaluate to nil or
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error occured during evaluation, it won't be expanded.
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* If the snippet has a condition that evaluate to
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non-nil (let's call it result):
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* If requirement is t, the snippet is ready to be
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expanded.
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* If requirement is eq to result, the snippet is ready
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to be expanded.
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* Otherwise the snippet won't be expanded.
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* If it evaluate to other non-nil value:
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* If the snippet has no condition, or has a condition that
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evaluate to non-nil, it is ready to be expanded.
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* Otherwise, it won't be expanded.
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Here's an example:
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(add-hook 'python-mode-hook
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'(lambda ()
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(setq yas/buffer-local-condition
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'(if (python-in-string/comment)
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'(require-snippet-condition . force-in-comment)
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t))))")
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(defvar yas/fallback-behavior 'call-other-command
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"The fall back behavior of YASnippet when it can't find a snippet
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to expand.
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* 'call-other-command means try to temporarily disable
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YASnippet and call other command bound to `yas/trigger-key'.
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* 'return-nil means return nil.")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Internal variables
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar yas/version "0.5.6-nested-placeholders")
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(defvar yas/snippet-tables (make-hash-table)
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"A hash table of snippet tables corresponding to each major-mode.")
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(defvar yas/menu-table (make-hash-table)
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"A hash table of menus of corresponding major-mode.")
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(defvar yas/menu-keymap (make-sparse-keymap "YASnippet"))
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;; empty menu will cause problems, so we insert some items
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(define-key yas/menu-keymap [yas/about]
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'(menu-item "About" yas/about))
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(define-key yas/menu-keymap [yas/reload]
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'(menu-item "Reload all snippets" yas/reload-all))
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(define-key yas/menu-keymap [yas/load]
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'(menu-item "Load snippets..." yas/load-directory))
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(define-key yas/menu-keymap [yas/separator]
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'(menu-item "--"))
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(defvar yas/known-modes
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'(ruby-mode rst-mode markdown-mode)
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"A list of mode which is well known but not part of emacs.")
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(defconst yas/escape-backslash
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(concat "YASESCAPE" "BACKSLASH" "PROTECTGUARD"))
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(defconst yas/escape-dollar
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(concat "YASESCAPE" "DOLLAR" "PROTECTGUARD"))
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(defconst yas/escape-backquote
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(concat "YASESCAPE" "BACKQUOTE" "PROTECTGUARD"))
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(defconst yas/field-regexp
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"${\\([0-9]+:\\)?\\([^}]*\\)}"
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"A regexp to *almost* recognize a field")
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(defconst yas/transform-mirror-regexp
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"${\\(?:\\([0-9]+\\):\\)?$\\([^}]*\\)"
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"A regexp to *almost* recognize a mirror with a transform")
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(defconst yas/simple-mirror-regexp
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"$\\([0-9]+\\)"
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"A regexp to recognize a simple mirror")
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(defvar yas/snippet-id-seed 0
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"Contains the next id for a snippet.")
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(defun yas/snippet-next-id ()
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(let ((id yas/snippet-id-seed))
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(incf yas/snippet-id-seed)
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id))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; YASnippet minor mode
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar yas/minor-mode-map (make-sparse-keymap)
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"The keymap of yas/minor-mode")
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(defvar yas/minor-mode-on-hook nil
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"Hook to call when yas/minor-mode is on.")
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(defvar yas/minor-mode-off-hook nil
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"Hook to call when yas/minor-mode is off.")
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(define-minor-mode yas/minor-mode
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"Toggle YASnippet mode.
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With no argument, this command toggles the mode.
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positive prefix argument turns on the mode.
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Negative prefix argument turns off the mode.
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When YASnippet mode is enabled, the TAB key
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expands snippets of code depending on the mode.
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You can customize the key through `yas/trigger-key'."
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;; The initial value.
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nil
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;; The indicator for the mode line.
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" yas"
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:group 'editing
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(define-key yas/minor-mode-map yas/trigger-key 'yas/expand)
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(if yas/minor-mode
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(progn
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(add-hook 'post-command-hook 'yas/post-command-handler nil t)
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(add-hook 'pre-command-hook 'yas/pre-command-handler t t))
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(remove-hook 'post-command-hook 'yas/post-command-handler)
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(remove-hook 'pre-command-hook 'yas/pre-command-handler)))
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(defun yas/minor-mode-auto-on ()
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"Turn on YASnippet minor mode unless `yas/dont-activate' is
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set to t."
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(unless yas/dont-activate
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(yas/minor-mode-on)))
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(defun yas/minor-mode-on ()
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"Turn on YASnippet minor mode."
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(interactive)
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(yas/minor-mode 1))
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(defun yas/minor-mode-off ()
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"Turn off YASnippet minor mode."
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(interactive)
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(yas/minor-mode -1))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Internal Structs
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defstruct (yas/template (:constructor yas/make-template
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(content name condition)))
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"A template for a snippet."
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content
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name
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condition)
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(defvar yas/active-field-overlay nil
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"Overlays the currently active field")
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(defvar yas/field-protection-overlays nil
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"Two overlays protect the current active field ")
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(make-variable-buffer-local 'yas/active-field-overlay)
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(make-variable-buffer-local 'yas/field-protection-overlays)
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(defstruct (yas/snippet (:constructor yas/make-snippet ()))
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"A snippet.
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..."
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(fields '())
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(exit nil)
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(id (yas/snippet-next-id) :read-only t)
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(control-overlay nil)
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active-field)
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(defstruct (yas/field (:constructor yas/make-field (number start end parent-field)))
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"A field."
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number
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start end
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parent-field
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(mirrors '())
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(next nil)
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(prev nil)
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(transform nil)
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(modified-p nil))
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(defstruct (yas/mirror (:constructor yas/make-mirror (start end transform)))
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"A mirror."
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start end
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(transform nil))
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(defstruct (yas/snippet-table (:constructor yas/make-snippet-table ()))
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"A table to store snippets for a perticular mode."
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(hash (make-hash-table :test 'equal))
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(parent nil))
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(defun yas/snippet-find-field (snippet number)
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(find-if #'(lambda (field)
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(eq number (yas/field-number field)))
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(yas/snippet-fields snippet)))
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(defun yas/snippet-field-compare (field1 field2)
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"Compare two fields. The field with a number is sorted first.
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If they both have a number, compare through the number. If neither
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have, compare through the field's start point"
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(let ((n1 (yas/field-number field1))
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(n2 (yas/field-number field2)))
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(if n1
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(if n2
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(< n1 n2)
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t)
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(if n2
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nil
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(< (yas/field-start field1)
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(yas/field-start field2))))))
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(defun yas/template-condition-predicate (condition)
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(condition-case err
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(save-excursion
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(save-restriction
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(save-match-data
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(eval condition))))
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(error (progn
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(message (format "[yas]error in condition evaluation: %s"
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(error-message-string err)))
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nil))))
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(defun yas/filter-templates-by-condition (templates)
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"Filter the templates using the condition. The rules are:
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* If the template has no condition, it is kept.
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* If the template's condition eval to non-nil, it is kept.
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* Otherwise (eval error or eval to nil) it is filtered."
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(remove-if-not '(lambda (pair)
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(let ((condition (yas/template-condition (cdr pair))))
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(if (null condition)
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(if yas/require-template-condition
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nil
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t)
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(let ((result
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(yas/template-condition-predicate condition)))
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(if yas/require-template-condition
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(if (eq yas/require-template-condition t)
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result
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(eq result yas/require-template-condition))
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result)))))
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templates))
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(defun yas/snippet-table-fetch (table key)
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"Fetch a snippet binding to KEY from TABLE. If not found,
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fetch from parent if any."
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(let ((templates (yas/filter-templates-by-condition
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(gethash key (yas/snippet-table-hash table)))))
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(when (and (null templates)
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(not (null (yas/snippet-table-parent table))))
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(setq templates (yas/snippet-table-fetch
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(yas/snippet-table-parent table)
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key)))
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templates))
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(defun yas/snippet-table-store (table full-key key template)
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"Store a snippet template in the table."
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(puthash key
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(yas/modify-alist (gethash key
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(yas/snippet-table-hash table))
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full-key
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template)
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(yas/snippet-table-hash table)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Internal functions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun yas/ensure-minor-mode-priority ()
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"Ensure that the key binding of yas/minor-mode takes priority."
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(unless (eq 'yas/minor-mode
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(caar minor-mode-map-alist))
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(setq minor-mode-map-alist
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(cons
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(cons 'yas/minor-mode yas/minor-mode-map)
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(assq-delete-all 'yas/minor-mode
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minor-mode-map-alist)))))
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(defun yas/real-mode? (mode)
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"Try to find out if MODE is a real mode. The MODE bound to
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a function (like `c-mode') is considered real mode. Other well
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known mode like `ruby-mode' which is not part of Emacs might
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not bound to a function until it is loaded. So yasnippet keeps
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a list of modes like this to help the judgement."
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(or (fboundp mode)
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(find mode yas/known-modes)))
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(defun yas/eval-string (string)
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"Evaluate STRING and convert the result to string."
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(condition-case err
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(save-excursion
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(save-restriction
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(save-match-data
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(widen)
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(format "%s" (eval (read string))))))
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(error (format "(error in elisp evaluation: %s)"
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(error-message-string err)))))
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(defun yas/apply-transform (field-or-mirror field)
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"Calculate the value of the field. If there's a transform
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for this field, apply it. Otherwise, the value is returned
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unmodified.
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TODO: I really dont think field transforms are easily done, but oh
|
|
well
|
|
|
|
"
|
|
(let ((text (yas/field-text-for-display field))
|
|
(transform (if (yas/mirror-p field-or-mirror)
|
|
(yas/mirror-transform field-or-mirror)
|
|
(yas/field-transform field-or-mirror))))
|
|
(if transform
|
|
(yas/eval-string transform)
|
|
text)))
|
|
|
|
(defsubst yas/replace-all (from to)
|
|
"Replace all occurance from FROM to TO."
|
|
(goto-char (point-min))
|
|
(while (search-forward from nil t)
|
|
(replace-match to t t)))
|
|
|
|
(defun yas/snippet-table (mode)
|
|
"Get the snippet table corresponding to MODE."
|
|
(let ((table (gethash mode yas/snippet-tables)))
|
|
(unless table
|
|
(setq table (yas/make-snippet-table))
|
|
(puthash mode table yas/snippet-tables))
|
|
table))
|
|
(defsubst yas/current-snippet-table ()
|
|
"Get the snippet table for current major-mode."
|
|
(yas/snippet-table major-mode))
|
|
|
|
(defun yas/menu-keymap-for-mode (mode)
|
|
"Get the menu keymap correspondong to MODE."
|
|
(let ((keymap (gethash mode yas/menu-table)))
|
|
(unless keymap
|
|
(setq keymap (make-sparse-keymap))
|
|
(puthash mode keymap yas/menu-table))
|
|
keymap))
|
|
|
|
(defun yas/current-key ()
|
|
"Get the key under current position. A key is used to find
|
|
the template of a snippet in the current snippet-table."
|
|
(let ((start (point))
|
|
(end (point))
|
|
(syntaxes yas/key-syntaxes)
|
|
syntax done templates)
|
|
(while (and (not done) syntaxes)
|
|
(setq syntax (car syntaxes))
|
|
(setq syntaxes (cdr syntaxes))
|
|
(save-excursion
|
|
(skip-syntax-backward syntax)
|
|
(setq start (point)))
|
|
(setq templates
|
|
(yas/snippet-table-fetch
|
|
(yas/current-snippet-table)
|
|
(buffer-substring-no-properties start end)))
|
|
(if templates
|
|
(setq done t)
|
|
(setq start end)))
|
|
(list templates
|
|
start
|
|
end)))
|
|
|
|
(defun yas/field-text-for-display (field)
|
|
"Return the propertized display text for field FIELD. "
|
|
(buffer-substring (yas/field-start field) (yas/field-end field)))
|
|
|
|
(defun yas/undo-in-progress ()
|
|
(or undo-in-progress
|
|
(eq this-command 'undo)))
|
|
|
|
(defun yas/make-control-overlay (start end)
|
|
"..."
|
|
(let ((overlay (make-overlay start
|
|
end
|
|
nil
|
|
t
|
|
nil)))
|
|
(overlay-put overlay 'keymap yas/keymap)
|
|
(overlay-put overlay 'yas/snippet snippet)
|
|
(overlay-put overlay 'evaporate t)
|
|
overlay))
|
|
|
|
(defun yas/clear-field (&optional field)
|
|
(interactive)
|
|
(let ((field (or field
|
|
(and yas/active-field-overlay
|
|
(overlay-buffer yas/active-field-overlay)
|
|
(overlay-get yas/active-field-overlay 'yas/field)))))
|
|
(let ((inhibit-modification-hooks t))
|
|
(delete-region (yas/field-start field) (yas/field-end field)))))
|
|
|
|
(defun yas/on-field-overlay-modification (overlay after? beg end &optional length)
|
|
"To be written"
|
|
(cond ((and after?
|
|
(not (yas/undo-in-progress)))
|
|
(mapcar #'yas/update-mirrors (yas/snippets-at-point)))
|
|
(t
|
|
(let ((field (overlay-get yas/active-field-overlay 'yas/field)))
|
|
(when (and field
|
|
(not (or after? (yas/undo-in-progress)))
|
|
(not (yas/field-modified-p field)))
|
|
(setf (yas/field-modified-p field) t)
|
|
(yas/clear-field field))))))
|
|
|
|
(defun yas/on-protection-overlay-modification (overlay after? beg end &optional length)
|
|
"To be written"
|
|
(cond ((not (or after?
|
|
(yas/undo-in-progress)))
|
|
(let ((snippet (car (yas/snippets-at-point))))
|
|
(when snippet
|
|
(yas/commit-snippet snippet)
|
|
(call-interactively this-command)
|
|
(error "Snippet exited"))))))
|
|
|
|
(defun yas/expand-snippet (start end template)
|
|
"Expand snippet at current point. Text between START and END
|
|
will be deleted before inserting template."
|
|
(run-hooks 'yas/before-expand-snippet-hook)
|
|
(goto-char start)
|
|
|
|
(let* ((key (buffer-substring-no-properties start end))
|
|
(length (- end start))
|
|
(column (current-column))
|
|
snippet)
|
|
(delete-char length)
|
|
(save-restriction
|
|
(let ((buffer-undo-list t))
|
|
(narrow-to-region start start)
|
|
(insert template)
|
|
(setq snippet (yas/snippet-create (point-min) (point-max))))
|
|
(push (cons (point-min) (point-max)) buffer-undo-list)
|
|
;; Push an undo action
|
|
(push `(apply yas/take-care-of-redo ,(point-min) ,(point-max) ,snippet)
|
|
buffer-undo-list))))
|
|
|
|
(defun yas/take-care-of-redo (beg end snippet)
|
|
(let ((inhibit-modification-hooks t))
|
|
(when yas/active-field-overlay
|
|
(delete-overlay yas/active-field-overlay))
|
|
(when yas/field-protection-overlays
|
|
(mapcar #'delete-overlay yas/field-protection-overlays)))
|
|
(push `(apply yas/snippet-revive ,beg ,end ,snippet)
|
|
buffer-undo-list))
|
|
|
|
(defun yas/snippet-revive (beg end snippet)
|
|
(setf (yas/snippet-control-overlay snippet) (yas/make-control-overlay beg end))
|
|
(overlay-put (yas/snippet-control-overlay snippet) 'yas/snippet snippet)
|
|
(yas/move-to-field snippet (or (yas/snippet-active-field snippet)
|
|
(car (yas/snippet-fields snippet))))
|
|
(push `(apply yas/take-care-of-redo ,beg ,end ,snippet)
|
|
buffer-undo-list))
|
|
|
|
(defun yas/snippet-create (begin end)
|
|
(let ((snippet (yas/make-snippet)))
|
|
(goto-char begin)
|
|
(yas/snippet-parse-create snippet)
|
|
|
|
;; Sort and link each field
|
|
(yas/snippet-sort-link-fields snippet)
|
|
|
|
;; Update the mirrors for the first time
|
|
(yas/update-mirrors snippet)
|
|
|
|
;; Create keymap overlay for snippet
|
|
(setf (yas/snippet-control-overlay snippet) (yas/make-control-overlay (point-min) (point-max)))
|
|
|
|
;; Move to end
|
|
(goto-char (point-max))
|
|
|
|
;; Place the cursor at a proper place
|
|
(let* ((first-field (car (yas/snippet-fields snippet)))
|
|
overlay)
|
|
(cond (first-field
|
|
;; Move to the new field, setting up properties of the
|
|
;; wandering active field overlay.
|
|
(yas/move-to-field snippet first-field))
|
|
(t
|
|
;; No fields, quite a simple snippet I suppose
|
|
(yas/exit-snippet snippet))))
|
|
snippet))
|
|
|
|
(defun yas/snippet-sort-link-fields (snippet)
|
|
(setf (yas/snippet-fields snippet)
|
|
(sort (yas/snippet-fields snippet)
|
|
'(lambda (field1 field2)
|
|
(yas/snippet-field-compare field1 field2))))
|
|
(let ((prev nil))
|
|
(dolist (field (yas/snippet-fields snippet))
|
|
(setf (yas/field-prev field) prev)
|
|
(when prev
|
|
(setf (yas/field-next prev) field))
|
|
(setq prev field))))
|
|
|
|
(defun yas/snippet-parse-create (snippet)
|
|
"Parse a recently inserted snippet template, creating all
|
|
necessary fields.
|
|
|
|
Allows nested placeholder in the style of Textmate."
|
|
(let ((parse-start (point)))
|
|
(yas/field-parse-create snippet)
|
|
(goto-char parse-start)
|
|
(yas/transform-mirror-parse-create snippet)
|
|
(goto-char parse-start)
|
|
(yas/simple-mirror-parse-create snippet)))
|
|
|
|
(defun yas/field-parse-create (snippet &optional parent-field)
|
|
(while (re-search-forward yas/field-regexp nil t)
|
|
(let* ((real-match-end-0 (scan-sexps (1+ (match-beginning 0)) 1))
|
|
(number (string-to-number (match-string-no-properties 1)))
|
|
(brand-new-field (and real-match-end-0
|
|
(save-match-data (not (string-match "$(" (match-string-no-properties 2))))
|
|
number
|
|
(not (zerop number))
|
|
(yas/make-field number
|
|
(set-marker (make-marker) (match-beginning 2))
|
|
(set-marker (make-marker) (1- real-match-end-0))
|
|
parent-field))))
|
|
(when brand-new-field
|
|
(delete-region (1- real-match-end-0) real-match-end-0)
|
|
(delete-region (match-beginning 0) (match-beginning 2))
|
|
(push brand-new-field (yas/snippet-fields snippet))
|
|
(save-excursion
|
|
(save-restriction
|
|
(narrow-to-region (yas/field-start brand-new-field) (yas/field-end brand-new-field))
|
|
(goto-char (point-min))
|
|
(yas/field-parse-create snippet brand-new-field)))))))
|
|
|
|
(defun yas/transform-mirror-parse-create (snippet)
|
|
(while (re-search-forward yas/transform-mirror-regexp nil t)
|
|
(let* ((real-match-end-0 (scan-sexps (1+ (match-beginning 0)) 1))
|
|
(number (string-to-number (match-string-no-properties 1)))
|
|
(field (and number
|
|
(not (zerop number))
|
|
(yas/snippet-find-field snippet number))))
|
|
(when (and real-match-end-0 field)
|
|
(push (yas/make-mirror (set-marker (make-marker) (match-beginning 0))
|
|
(set-marker (make-marker) (match-beginning 0))
|
|
(buffer-substring-no-properties (match-beginning 2)
|
|
(1- real-match-end-0)))
|
|
(yas/field-mirrors field))
|
|
(delete-region (match-beginning 0) real-match-end-0)))))
|
|
|
|
(defun yas/simple-mirror-parse-create (snippet)
|
|
(while (re-search-forward yas/simple-mirror-regexp nil t)
|
|
(let ((number (string-to-number (match-string-no-properties 1))))
|
|
(cond ((zerop number)
|
|
(setf (yas/snippet-exit snippet)
|
|
(set-marker (make-marker) (match-beginning 0)))
|
|
(delete-region (match-beginning 0) (match-end 0)))
|
|
(t
|
|
(let ((field (yas/snippet-find-field snippet number)))
|
|
(when field
|
|
(push (yas/make-mirror (set-marker (make-marker) (match-beginning 0))
|
|
(set-marker (make-marker) (match-beginning 0))
|
|
nil)
|
|
(yas/field-mirrors field))
|
|
(delete-region (match-beginning 0) (match-end 0)))))))))
|
|
|
|
(defun yas/update-mirrors (snippet)
|
|
(save-excursion
|
|
(dolist (field (yas/snippet-fields snippet))
|
|
(dolist (mirror (yas/field-mirrors field))
|
|
(yas/mirror-update-display mirror field)))))
|
|
|
|
(defun yas/mirror-update-display (mirror field)
|
|
(goto-char (yas/mirror-start mirror))
|
|
(delete-region (yas/mirror-start mirror) (yas/mirror-end mirror))
|
|
(insert (yas/apply-transform mirror field))
|
|
(set-marker (yas/mirror-end mirror) (point)))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;;; Template-related and snippet loading functions
|
|
|
|
(defun yas/parse-template (&optional file-name)
|
|
"Parse the template in the current buffer.
|
|
If the buffer contains a line of \"# --\" then the contents
|
|
above this line are ignored. Variables can be set above this
|
|
line through the syntax:
|
|
|
|
#name : value
|
|
|
|
Here's a list of currently recognized variables:
|
|
|
|
* name
|
|
* contributor
|
|
* condition
|
|
|
|
#name: #include \"...\"
|
|
# --
|
|
#include \"$1\""
|
|
(goto-char (point-min))
|
|
(let ((name file-name) template bound condition)
|
|
(if (re-search-forward "^# --\n" nil t)
|
|
(progn (setq template
|
|
(buffer-substring-no-properties (point)
|
|
(point-max)))
|
|
(setq bound (point))
|
|
(goto-char (point-min))
|
|
(while (re-search-forward "^#\\([^ ]+\\) *: *\\(.*\\)$" bound t)
|
|
(when (string= "name" (match-string-no-properties 1))
|
|
(setq name (match-string-no-properties 2)))
|
|
(when (string= "condition" (match-string-no-properties 1))
|
|
(setq condition (read (match-string-no-properties 2))))))
|
|
(setq template
|
|
(buffer-substring-no-properties (point-min) (point-max))))
|
|
(list template name condition)))
|
|
|
|
(defun yas/directory-files (directory file?)
|
|
"Return directory files or subdirectories in full path."
|
|
(remove-if (lambda (file)
|
|
(or (string-match "^\\."
|
|
(file-name-nondirectory file))
|
|
(if file?
|
|
(file-directory-p file)
|
|
(not (file-directory-p file)))))
|
|
(directory-files directory t)))
|
|
|
|
(defun yas/make-menu-binding (template)
|
|
(lexical-let ((template template))
|
|
(lambda ()
|
|
(interactive)
|
|
(yas/expand-snippet (point)
|
|
(point)
|
|
template))))
|
|
|
|
(defun yas/modify-alist (alist key value)
|
|
"Modify ALIST to map KEY to VALUE. return the new alist."
|
|
(let ((pair (assoc key alist)))
|
|
(if (null pair)
|
|
(cons (cons key value)
|
|
alist)
|
|
(setcdr pair value)
|
|
alist)))
|
|
|
|
(defun yas/fake-keymap-for-popup (templates)
|
|
"Create a fake keymap for popup menu usage."
|
|
(cons 'keymap
|
|
(mapcar (lambda (pair)
|
|
(let* ((template (cdr pair))
|
|
(name (yas/template-name template))
|
|
(content (yas/template-content template)))
|
|
(list content 'menu-item name t)))
|
|
templates)))
|
|
|
|
(defun yas/point-to-coord (&optional point)
|
|
"Get the xoffset/yoffset information of POINT.
|
|
If POINT is not given, default is to current point.
|
|
If `posn-at-point' is not available (like in Emacs 21.3),
|
|
t is returned simply."
|
|
(if (fboundp 'posn-at-point)
|
|
(let ((x-y (posn-x-y (posn-at-point (or point (point))))))
|
|
(list (list (+ (car x-y) 10)
|
|
(+ (cdr x-y) 20))
|
|
(selected-window)))
|
|
t))
|
|
|
|
(defun yas/x-popup-menu-for-template (templates)
|
|
"Show a popup menu listing templates to let the user select one."
|
|
(car (x-popup-menu (yas/point-to-coord)
|
|
(yas/fake-keymap-for-popup templates))))
|
|
(defun yas/text-popup-for-template (templates)
|
|
"Can't display popup menu in text mode. Just select the first one."
|
|
(yas/template-content (cdar templates)))
|
|
(defun yas/dropdown-list-popup-for-template (templates)
|
|
"Use dropdown-list.el to popup for templates. Better than the
|
|
default \"select first\" behavior of `yas/text-popup-for-template'.
|
|
You can also use this in window-system.
|
|
|
|
NOTE: You need to download and install dropdown-list.el to use this."
|
|
(if (fboundp 'dropdown-list)
|
|
(let ((n (dropdown-list (mapcar (lambda (i)
|
|
(yas/template-name
|
|
(cdr i)))
|
|
templates))))
|
|
(if n
|
|
(yas/template-content
|
|
(cdr (nth n templates)))
|
|
nil))
|
|
(error "Please download and install dropdown-list.el to use this")))
|
|
|
|
(defun yas/popup-for-template (templates)
|
|
(if window-system
|
|
(funcall yas/window-system-popup-function templates)
|
|
(funcall yas/text-popup-function templates)))
|
|
|
|
(defun yas/load-directory-1 (directory &optional parent)
|
|
"Really do the job of loading snippets from a directory
|
|
hierarchy."
|
|
(let ((mode-sym (intern (file-name-nondirectory directory)))
|
|
(snippets nil))
|
|
(with-temp-buffer
|
|
(dolist (file (yas/directory-files directory t))
|
|
(when (file-readable-p file)
|
|
(insert-file-contents file nil nil nil t)
|
|
(let ((snippet-file-name (file-name-nondirectory file)))
|
|
(push (cons snippet-file-name
|
|
(yas/parse-template snippet-file-name))
|
|
snippets)))))
|
|
(yas/define-snippets mode-sym
|
|
snippets
|
|
parent)
|
|
(dolist (subdir (yas/directory-files directory nil))
|
|
(yas/load-directory-1 subdir mode-sym))))
|
|
|
|
(defun yas/quote-string (string)
|
|
"Escape and quote STRING.
|
|
foo\"bar\\! -> \"foo\\\"bar\\\\!\""
|
|
(concat "\""
|
|
(replace-regexp-in-string "[\\\"]"
|
|
"\\\\\\&"
|
|
string
|
|
t)
|
|
"\""))
|
|
|
|
(defun yas/compile-bundle
|
|
(&optional yasnippet yasnippet-bundle snippet-roots code)
|
|
"Compile snippets in SNIPPET-ROOTS to a single bundle file.
|
|
SNIPPET-ROOTS is a list of root directories that contains the snippets
|
|
definition. YASNIPPET is the yasnippet.el file path. YASNIPPET-BUNDLE
|
|
is the output file of the compile result. CODE is the code you would
|
|
like to used to initialize yasnippet. Here's the default value for
|
|
all the parameters:
|
|
|
|
(yas/compile-bundle \"yasnippet.el\"
|
|
\"./yasnippet-bundle.el\"
|
|
'(\"snippets\")
|
|
\"(yas/initialize)\")"
|
|
(when (null yasnippet)
|
|
(setq yasnippet "yasnippet.el"))
|
|
(when (null yasnippet-bundle)
|
|
(setq yasnippet-bundle "./yasnippet-bundle.el"))
|
|
(when (null snippet-roots)
|
|
(setq snippet-roots '("snippets")))
|
|
(when (null code)
|
|
(setq code "(yas/initialize)"))
|
|
|
|
(let ((dirs (or (and (listp snippet-roots) snippet-roots)
|
|
(list snippet-roots)))
|
|
(bundle-buffer nil))
|
|
(with-temp-buffer
|
|
(setq bundle-buffer (current-buffer))
|
|
(insert-file-contents yasnippet)
|
|
(goto-char (point-max))
|
|
(insert ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\n")
|
|
(insert ";;;; Auto-generated code ;;;;\n")
|
|
(insert ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\n")
|
|
(insert code "\n")
|
|
(flet ((yas/define-snippets
|
|
(mode snippets &optional parent)
|
|
(with-current-buffer bundle-buffer
|
|
(insert ";;; snippets for " (symbol-name mode) "\n")
|
|
(insert "(yas/define-snippets '" (symbol-name mode) "\n")
|
|
(insert "'(\n")
|
|
(dolist (snippet snippets)
|
|
(insert " ("
|
|
(yas/quote-string (car snippet))
|
|
" "
|
|
(yas/quote-string (cadr snippet))
|
|
" "
|
|
(if (caddr snippet)
|
|
(yas/quote-string (caddr snippet))
|
|
"nil")
|
|
" "
|
|
(if (nth 3 snippet)
|
|
(format "'%s" (nth 3 snippet))
|
|
"nil")
|
|
")\n"))
|
|
(insert " )\n")
|
|
(insert (if parent
|
|
(concat "'" (symbol-name parent))
|
|
"nil")
|
|
")\n\n"))))
|
|
(dolist (dir dirs)
|
|
(dolist (subdir (yas/directory-files dir nil))
|
|
(yas/load-directory-1 subdir nil))))
|
|
(insert "(provide '"
|
|
(file-name-nondirectory
|
|
(file-name-sans-extension
|
|
yasnippet-bundle))
|
|
")\n")
|
|
(setq buffer-file-name yasnippet-bundle)
|
|
(save-buffer))))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; User level functions
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
(defun yas/about ()
|
|
(interactive)
|
|
(message (concat "yasnippet (version "
|
|
yas/version
|
|
") -- pluskid <pluskid@gmail.com>")))
|
|
(defun yas/reload-all ()
|
|
"Reload all snippets."
|
|
(interactive)
|
|
(if yas/root-directory
|
|
(if (listp yas/root-directory)
|
|
(dolist (directory yas/root-directory)
|
|
(yas/load-directory directory))
|
|
(yas/load-directory yas/root-directory))
|
|
(call-interactively 'yas/load-directory))
|
|
(message "done."))
|
|
|
|
(defun yas/load-directory (directory)
|
|
"Load snippet definition from a directory hierarchy.
|
|
Below the top-level directory, each directory is a mode
|
|
name. And under each subdirectory, each file is a definition
|
|
of a snippet. The file name is the trigger key and the
|
|
content of the file is the template."
|
|
(interactive "DSelect the root directory: ")
|
|
(unless (file-directory-p directory)
|
|
(error "Error %s not a directory" directory))
|
|
(add-to-list 'yas/root-directory directory)
|
|
(dolist (dir (yas/directory-files directory nil))
|
|
(yas/load-directory-1 dir))
|
|
(when (interactive-p)
|
|
(message "done.")))
|
|
|
|
(defun yas/initialize ()
|
|
"Do necessary initialization."
|
|
(add-hook 'after-change-major-mode-hook
|
|
'yas/minor-mode-auto-on)
|
|
(dolist (hook yas/extra-mode-hooks)
|
|
(add-hook hook
|
|
'yas/minor-mode-auto-on))
|
|
(add-hook 'yas/minor-mode-on-hook
|
|
'yas/ensure-minor-mode-priority)
|
|
(when yas/use-menu
|
|
(define-key-after
|
|
(lookup-key global-map [menu-bar])
|
|
[yasnippet]
|
|
(cons "YASnippet" yas/menu-keymap)
|
|
'buffer)))
|
|
|
|
(defun yas/define-snippets (mode snippets &optional parent-mode)
|
|
"Define snippets for MODE. SNIPPETS is a list of
|
|
snippet definition, of the following form:
|
|
|
|
(KEY TEMPLATE NAME CONDITION)
|
|
|
|
or the NAME and CONDITION may be omitted. The optional 3rd
|
|
parameter can be used to specify the parent mode of MODE. That
|
|
is, when looking a snippet in MODE failed, it can refer to its
|
|
parent mode. The PARENT-MODE may not need to be a real mode."
|
|
(let ((snippet-table (yas/snippet-table mode))
|
|
(parent-table (if parent-mode
|
|
(yas/snippet-table parent-mode)
|
|
nil))
|
|
(keymap (if yas/use-menu
|
|
(yas/menu-keymap-for-mode mode)
|
|
nil)))
|
|
(when parent-table
|
|
(setf (yas/snippet-table-parent snippet-table)
|
|
parent-table)
|
|
(when yas/use-menu
|
|
(define-key keymap (vector 'parent-mode)
|
|
`(menu-item "parent mode"
|
|
,(yas/menu-keymap-for-mode parent-mode)))))
|
|
(when (and yas/use-menu
|
|
(yas/real-mode? mode))
|
|
(define-key yas/menu-keymap (vector mode)
|
|
`(menu-item ,(symbol-name mode) ,keymap)))
|
|
(dolist (snippet snippets)
|
|
(let* ((full-key (car snippet))
|
|
(key (file-name-sans-extension full-key))
|
|
(name (or (caddr snippet) (file-name-extension full-key)))
|
|
(condition (nth 3 snippet))
|
|
(template (yas/make-template (cadr snippet)
|
|
(or name key)
|
|
condition)))
|
|
(yas/snippet-table-store snippet-table
|
|
full-key
|
|
key
|
|
template)
|
|
(when yas/use-menu
|
|
(define-key keymap (vector (make-symbol full-key))
|
|
`(menu-item ,(yas/template-name template)
|
|
,(yas/make-menu-binding (yas/template-content template))
|
|
:keys ,(concat key yas/trigger-symbol))))))))
|
|
|
|
(defun yas/set-mode-parent (mode parent)
|
|
"Set parent mode of MODE to PARENT."
|
|
(setf (yas/snippet-table-parent
|
|
(yas/snippet-table mode))
|
|
(yas/snippet-table parent))
|
|
(when yas/use-menu
|
|
(define-key (yas/menu-keymap-for-mode mode) (vector 'parent-mode)
|
|
`(menu-item "parent mode"
|
|
,(yas/menu-keymap-for-mode parent)))))
|
|
|
|
(defun yas/define (mode key template &optional name condition)
|
|
"Define a snippet. Expanding KEY into TEMPLATE.
|
|
NAME is a description to this template. Also update
|
|
the menu if `yas/use-menu' is `t'. CONDITION is the
|
|
condition attached to this snippet. If you attach a
|
|
condition to a snippet, then it will only be expanded
|
|
when the condition evaluated to non-nil."
|
|
(yas/define-snippets mode
|
|
(list (list key template name condition))))
|
|
|
|
|
|
(defun yas/hippie-try-expand (first-time?)
|
|
"Integrate with hippie expand. Just put this function in
|
|
`hippie-expand-try-functions-list'."
|
|
(if (not first-time?)
|
|
(let ((yas/fallback-behavior 'return-nil))
|
|
(yas/expand))
|
|
(when (and (null (car buffer-undo-list))
|
|
(eq 'apply
|
|
(car (cadr buffer-undo-list)))
|
|
(eq 'yas/undo-expand-snippet
|
|
(cadr (cadr buffer-undo-list))))
|
|
(undo 1))
|
|
nil))
|
|
|
|
(defun yas/expand ()
|
|
"Expand a snippet."
|
|
(interactive)
|
|
(let ((local-condition (yas/template-condition-predicate
|
|
yas/buffer-local-condition)))
|
|
(if local-condition
|
|
(let ((yas/require-template-condition
|
|
(if (and (consp local-condition)
|
|
(eq 'require-snippet-condition (car local-condition))
|
|
(symbolp (cdr local-condition)))
|
|
(cdr local-condition)
|
|
nil)))
|
|
(multiple-value-bind (templates start end) (yas/current-key)
|
|
(if templates
|
|
(let ((template (if (null (cdr templates)) ; only 1 template
|
|
(yas/template-content (cdar templates))
|
|
(yas/popup-for-template templates))))
|
|
(if template
|
|
(progn (yas/expand-snippet start end template)
|
|
'expanded) ; expanded successfully
|
|
'interrupted)) ; interrupted by user
|
|
(if (eq yas/fallback-behavior 'return-nil)
|
|
nil ; return nil
|
|
(let* ((yas/minor-mode nil)
|
|
(command (key-binding yas/trigger-key)))
|
|
(when (commandp command)
|
|
(call-interactively command))))))))))
|
|
|
|
(defun yas/field-probably-deleted-p (field)
|
|
"Guess if FIELD was deleted because of his parent-field"
|
|
(and (zerop (- (yas/field-start field) (yas/field-end field)))
|
|
(yas/field-parent-field field)))
|
|
|
|
(defun yas/snippets-at-point ()
|
|
(remove nil (mapcar #'(lambda (ov)
|
|
(overlay-get ov 'yas/snippet))
|
|
(overlays-at (point)))))
|
|
|
|
|
|
(defun yas/next-field (&optional arg)
|
|
"Navigate to next field. If there's none, exit the snippet."
|
|
(interactive)
|
|
(let* ((arg (or arg
|
|
1))
|
|
(snippet (first (yas/snippets-at-point)))
|
|
(active-field (overlay-get yas/active-field-overlay 'yas/field))
|
|
(number (and snippet
|
|
(+ arg
|
|
(yas/field-number active-field))))
|
|
(live-fields (remove-if #'yas/field-probably-deleted-p (yas/snippet-fields snippet)))
|
|
(target-field (yas/snippet-find-field snippet number)))
|
|
(cond ((and number
|
|
(> number (length live-fields)))
|
|
(yas/exit-snippet snippet))
|
|
(target-field
|
|
(yas/move-to-field snippet target-field))
|
|
(t
|
|
nil))))
|
|
|
|
(defun yas/make-move-active-field-overlay (snippet field)
|
|
(if (and yas/active-field-overlay
|
|
(overlay-buffer yas/active-field-overlay))
|
|
(move-overlay yas/active-field-overlay
|
|
(yas/field-start field)
|
|
(yas/field-end field))
|
|
(setq yas/active-field-overlay
|
|
(make-overlay (yas/field-start field)
|
|
(yas/field-end field)
|
|
nil nil t))
|
|
(overlay-put yas/active-field-overlay 'face 'yas/field-highlight-face)
|
|
;;(overlay-put yas/active-field-overlay 'evaporate t)
|
|
(overlay-put yas/active-field-overlay 'modification-hooks '(yas/on-field-overlay-modification))
|
|
(overlay-put yas/active-field-overlay 'insert-in-front-hooks '(yas/on-field-overlay-modification))
|
|
(overlay-put yas/active-field-overlay 'insert-behind-hooks '(yas/on-field-overlay-modification))))
|
|
|
|
(defun yas/make-move-field-protection-overlays (snippet field)
|
|
(cond ((and yas/field-protection-overlays
|
|
(every #'overlay-buffer yas/field-protection-overlays))
|
|
(move-overlay (first yas/field-protection-overlays) (1- (yas/field-start field)) (yas/field-start field))
|
|
(move-overlay (second yas/field-protection-overlays) (yas/field-end field) (1+ (yas/field-end field))))
|
|
(t
|
|
(setq yas/field-protection-overlays
|
|
(list (make-overlay (1- (yas/field-start field)) (yas/field-start field) nil t nil)
|
|
(make-overlay (yas/field-end field) (1+ (yas/field-end field)) nil t nil)))
|
|
(dolist (ov yas/field-protection-overlays)
|
|
(overlay-put ov 'face 'yas/field-debug-face)
|
|
;; (overlay-put ov 'evaporate t)
|
|
(overlay-put ov 'modification-hooks '(yas/on-protection-overlay-modification))))))
|
|
|
|
|
|
(defun yas/move-to-field (snippet field)
|
|
"Update SNIPPET to move to field FIELD.
|
|
|
|
Also create some protection overlays"
|
|
(goto-char (yas/field-start field))
|
|
(setf (yas/snippet-active-field snippet) field)
|
|
(yas/make-move-active-field-overlay snippet field)
|
|
(yas/make-move-field-protection-overlays snippet field)
|
|
(overlay-put yas/active-field-overlay 'yas/field field))
|
|
|
|
(defun yas/prev-field ()
|
|
"Navigate to prev field. If there's none, exit the snippet."
|
|
(interactive)
|
|
(yas/next-field -1))
|
|
|
|
(defun yas/exit-snippet (snippet)
|
|
"Goto exit-marker of SNIPPET and commit the snippet. Cleaning
|
|
up the snippet does not delete it!"
|
|
(interactive)
|
|
(goto-char (if (yas/snippet-exit snippet)
|
|
(yas/snippet-exit snippet)
|
|
(overlay-end (yas/snippet-control-overlay snippet)))))
|
|
|
|
(defun yas/exterminate-snippets ()
|
|
"Remove all snippets in buffer"
|
|
(interactive)
|
|
(mapcar #'yas/commit-snippet (remove nil (mapcar #'(lambda (ov)
|
|
(overlay-get ov 'yas/snippet))
|
|
(overlays-in (point-min) (point-max))))))
|
|
|
|
(defun yas/delete-overlay-region (overlay)
|
|
(delete-region (overlay-start overlay) (overlay-end overlay)))
|
|
|
|
(defun yas/commit-snippet (snippet)
|
|
"Commit SNIPPET, but leave point as it is. This renders the
|
|
snippet as ordinary text.
|
|
|
|
Return a buffer position where the point should be placed if
|
|
exiting the snippet."
|
|
(let ((control-overlay (yas/snippet-control-overlay snippet))
|
|
yas/snippet-beg
|
|
yas/snippet-end)
|
|
;;
|
|
;; Save the end of the moribund snippet in case we need to revive it
|
|
;; its original expansion.
|
|
;;
|
|
(when (and control-overlay
|
|
(overlay-buffer control-overlay))
|
|
(setq yas/snippet-beg (overlay-start control-overlay))
|
|
(setq yas/snippet-end (overlay-end control-overlay))
|
|
(delete-overlay control-overlay))
|
|
|
|
(let ((inhibit-modification-hooks t))
|
|
(when yas/active-field-overlay
|
|
(delete-overlay yas/active-field-overlay))
|
|
(when yas/field-protection-overlays
|
|
(mapcar #'delete-overlay yas/field-protection-overlays)))
|
|
|
|
;; Push an action for snippet revival
|
|
;;
|
|
(push `(apply yas/snippet-revive ,yas/snippet-beg ,yas/snippet-end ,snippet)
|
|
buffer-undo-list)
|
|
|
|
;; XXX: `yas/after-exit-snippet-hook' should be run with
|
|
;; `yas/snippet-beg' and `yas/snippet-end' bound. That might not
|
|
;; be the case if the main overlay had somehow already
|
|
;; disappeared, which sometimes happens when the snippet's messed
|
|
;; up...
|
|
;;
|
|
(run-hooks 'yas/after-exit-snippet-hook)))
|
|
|
|
(defun yas/check-commit-snippet ()
|
|
"Checks if point exited the currently active field of the
|
|
snippet, if so cleans up the whole snippet up."
|
|
(let* ((snippet (first (yas/snippets-at-point))))
|
|
(cond ((null snippet)
|
|
;;
|
|
;; No snippet at point, cleanup *all* snippets
|
|
;;
|
|
(yas/exterminate-snippets))
|
|
((let ((beg (overlay-start yas/active-field-overlay))
|
|
(end (overlay-end yas/active-field-overlay)))
|
|
(or (not end)
|
|
(not beg)
|
|
(> (point) end)
|
|
(< (point) beg)))
|
|
;; A snippet exitss at point, but point left the currently
|
|
;; active field overlay
|
|
(yas/commit-snippet snippet))
|
|
( ;;
|
|
;; Snippet at point, and point inside a snippet field,
|
|
;; everything is normal
|
|
;;
|
|
t
|
|
nil))))
|
|
|
|
;;
|
|
;; Pre and post command handlers
|
|
;;
|
|
(defun yas/pre-command-handler ()
|
|
)
|
|
|
|
(defun yas/post-command-handler ()
|
|
(cond ((eq 'undo this-command)
|
|
(let ((snippet (car (yas/snippets-at-point))))
|
|
(when snippet
|
|
(yas/move-to-field snippet (or (yas/snippet-active-field snippet)
|
|
(car (yas/snippet-fields snippet)))))))
|
|
((not (yas/undo-in-progress))
|
|
(yas/check-commit-snippet))))
|
|
|
|
;; Debug functions. Use (or change) at will whenever needed.
|
|
|
|
(defun yas/debug-some-vars ()
|
|
(interactive)
|
|
(with-output-to-temp-buffer "*YASnippet trace*"
|
|
(princ "Interesting YASnippet vars: \n\n")
|
|
|
|
(princ (format "\nPost command hook: %s\n" post-command-hook))
|
|
(princ (format "\nPre command hook: %s\n" pre-command-hook))
|
|
|
|
(princ (format "\nUndo is %s and point-max is %s.\n"
|
|
(if (eq buffer-undo-list t)
|
|
"DISABLED"
|
|
"ENABLED")
|
|
(point-max)))
|
|
(unless (eq buffer-undo-list t)
|
|
(princ (format "Undpolist has %s elements. First 10 elements follow:\n" (length buffer-undo-list)))
|
|
(let ((first-ten (subseq buffer-undo-list 0 19)))
|
|
(dolist (undo-elem first-ten)
|
|
(princ (format "%2s: %s\n" (position undo-elem first-ten) (truncate-string-to-width (format "%s" undo-elem) 70))))))))
|
|
|
|
|
|
(defun yas/exterminate-package ()
|
|
(interactive)
|
|
(yas/minor-mode -1)
|
|
(mapatoms #'(lambda (atom)
|
|
(when (string-match "yas/" (symbol-name atom))
|
|
(unintern atom)))))
|
|
|
|
(defun yas/debug-test (&optional quiet)
|
|
(interactive "P")
|
|
(yas/load-directory "~/Source/yasnippet/snippets/")
|
|
;;(kill-buffer (get-buffer "*YAS TEST*"))
|
|
(set-buffer (switch-to-buffer "*YAS TEST*"))
|
|
(yas/exterminate-snippets)
|
|
(erase-buffer)
|
|
(setq buffer-undo-list nil)
|
|
(html-mode)
|
|
(let ((abbrev))
|
|
;; (if (require 'ido nil t)
|
|
;; (setq abbrev (ido-completing-read "Snippet abbrev: " '("crazy" "prip" "prop")))
|
|
;; (setq abbrev "prop"))
|
|
(setq abbrev "bosta")
|
|
(insert abbrev))
|
|
(unless quiet
|
|
(add-hook 'post-command-hook 'yas/debug-some-vars 't 'local))
|
|
)
|
|
|
|
|
|
(provide 'yasnippet)
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Monkey patching for other functions that's causing
|
|
;; problems to yasnippet. For details on why I patch
|
|
;; those functions, refer to
|
|
;; http://code.google.com/p/yasnippet/wiki/MonkeyPatching
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
(defadvice c-neutralize-syntax-in-CPP
|
|
(around yas-mp/c-neutralize-syntax-in-CPP activate)
|
|
"Adviced `c-neutralize-syntax-in-CPP' to properly
|
|
handle the end-of-buffer error fired in it by calling
|
|
`forward-char' at the end of buffer."
|
|
(condition-case err
|
|
ad-do-it
|
|
(error (message (error-message-string err)))))
|