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1 | ;;;; srecode/find.el --- Tools for finding templates in the database. |
2 | ||
114f9c96 | 3 | ;; Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
4d902e6f CY |
4 | |
5 | ;; Author: Eric M. Ludlam <eric@siege-engine.com> | |
6 | ||
7 | ;; This file is part of GNU Emacs. | |
8 | ||
9 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
11 | ;; the Free Software Foundation, either version 3 of the License, or | |
12 | ;; (at your option) any later version. | |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
21 | ||
22 | ;;; Commentary: | |
23 | ;; | |
24 | ;; Various routines that search through various template tables | |
25 | ;; in search of the right template. | |
26 | ||
27 | (require 'srecode/ctxt) | |
28 | (require 'srecode/table) | |
29 | (require 'srecode/map) | |
30 | ||
31 | (declare-function srecode-compile-file "srecode/compile") | |
32 | ||
33 | ;;; Code: | |
34 | ||
35 | (defun srecode-table (&optional mode) | |
36 | "Return the currently active Semantic Recoder table for this buffer. | |
37 | Optional argument MODE specifies the mode table to use." | |
38 | (let* ((modeq (or mode major-mode)) | |
39 | (table (srecode-get-mode-table modeq))) | |
40 | ||
41 | ;; If there isn't one, keep searching backwards for a table. | |
42 | (while (and (not table) (setq modeq (get-mode-local-parent modeq))) | |
43 | (setq table (srecode-get-mode-table modeq))) | |
44 | ||
45 | ;; Last ditch effort. | |
46 | (when (not table) | |
47 | (setq table (srecode-get-mode-table 'default))) | |
48 | ||
49 | table)) | |
50 | ||
51 | ;;; TRACKER | |
52 | ;; | |
53 | ;; Template file tracker for between sessions. | |
54 | ;; | |
55 | (defun srecode-load-tables-for-mode (mmode &optional appname) | |
56 | "Load all the template files for MMODE. | |
57 | Templates are found in the SRecode Template Map. | |
58 | See `srecode-get-maps' for more. | |
59 | APPNAME is the name of an application. In this case, | |
60 | all template files for that application will be loaded." | |
61 | (require 'srecode/compile) | |
62 | (let ((files | |
63 | (if appname | |
64 | (apply 'append | |
65 | (mapcar | |
66 | (lambda (map) | |
67 | (srecode-map-entries-for-app-and-mode map appname mmode)) | |
68 | (srecode-get-maps))) | |
69 | (apply 'append | |
70 | (mapcar | |
71 | (lambda (map) | |
72 | (srecode-map-entries-for-mode map mmode)) | |
73 | (srecode-get-maps))))) | |
74 | ) | |
75 | ;; Don't recurse if we are already the 'default state. | |
76 | (when (not (eq mmode 'default)) | |
77 | ;; Are we a derived mode? If so, get the parent mode's | |
78 | ;; templates loaded too. | |
79 | (if (get-mode-local-parent mmode) | |
80 | (srecode-load-tables-for-mode (get-mode-local-parent mmode) | |
81 | appname) | |
82 | ;; No parent mode, all templates depend on the defaults being | |
83 | ;; loaded in, so get that in instead. | |
84 | (srecode-load-tables-for-mode 'default appname))) | |
85 | ||
86 | ;; Load in templates for our major mode. | |
87 | (dolist (f files) | |
88 | (let ((mt (srecode-get-mode-table mmode)) | |
89 | ) | |
90 | (when (or (not mt) (not (srecode-mode-table-find mt (car f)))) | |
91 | (srecode-compile-file (car f))) | |
92 | )) | |
93 | )) | |
94 | ||
95 | ;;; SEARCH | |
96 | ;; | |
97 | ;; Find a given template based on name, and features of the current | |
98 | ;; buffer. | |
99 | (defmethod srecode-template-get-table ((tab srecode-template-table) | |
100 | template-name &optional | |
101 | context application) | |
102 | "Find in the template in table TAB, the template with TEMPLATE-NAME. | |
103 | Optional argument CONTEXT specifies that the template should part | |
104 | of a particular context. | |
105 | The APPLICATION argument is unused." | |
106 | (if context | |
107 | ;; If a context is specified, then look it up there. | |
108 | (let ((ctxth (gethash context (oref tab contexthash)))) | |
109 | (when ctxth | |
110 | (gethash template-name ctxth))) | |
111 | ;; No context, perhaps a merged name? | |
112 | (gethash template-name (oref tab namehash)))) | |
113 | ||
114 | (defmethod srecode-template-get-table ((tab srecode-mode-table) | |
115 | template-name &optional | |
116 | context application) | |
117 | "Find in the template in mode table TAB, the template with TEMPLATE-NAME. | |
118 | Optional argument CONTEXT specifies a context a particular template | |
119 | would belong to. | |
120 | Optional argument APPLICATION restricts searches to only template tables | |
121 | belonging to a specific application. If APPLICATION is nil, then only | |
122 | tables that do not belong to an application will be searched." | |
123 | (let* ((mt tab) | |
124 | (tabs (oref mt :tables)) | |
125 | (ans nil)) | |
126 | (while (and (not ans) tabs) | |
127 | (let ((app (oref (car tabs) :application))) | |
128 | (when (or (and (not application) (null app)) | |
129 | (and application (eq app application))) | |
130 | (setq ans (srecode-template-get-table (car tabs) template-name | |
131 | context))) | |
132 | (setq tabs (cdr tabs)))) | |
133 | (or ans | |
134 | ;; Recurse to the default. | |
135 | (when (not (equal (oref tab :major-mode) 'default)) | |
136 | (srecode-template-get-table (srecode-get-mode-table 'default) | |
137 | template-name context application))))) | |
138 | ||
139 | ;; | |
140 | ;; Find a given template based on a key binding. | |
141 | ;; | |
142 | (defmethod srecode-template-get-table-for-binding | |
143 | ((tab srecode-template-table) binding &optional context) | |
144 | "Find in the template name in table TAB, the template with BINDING. | |
145 | Optional argument CONTEXT specifies that the template should part | |
146 | of a particular context." | |
147 | (let* ((keyout nil) | |
148 | (hashfcn (lambda (key value) | |
149 | (when (and (slot-boundp value 'binding) | |
150 | (oref value binding) | |
151 | (= (aref (oref value binding) 0) binding)) | |
152 | (setq keyout key)))) | |
153 | (contextstr (cond ((listp context) | |
154 | (car-safe context)) | |
155 | ((stringp context) | |
156 | context) | |
157 | (t nil))) | |
158 | ) | |
159 | (if context | |
160 | (let ((ctxth (gethash contextstr (oref tab contexthash)))) | |
161 | (when ctxth | |
162 | ;; If a context is specified, then look it up there. | |
163 | (maphash hashfcn ctxth) | |
164 | ;; Context hashes EXCLUDE the context prefix which | |
165 | ;; we need to include, so concat it here | |
166 | (when keyout | |
167 | (setq keyout (concat contextstr ":" keyout))) | |
168 | ))) | |
169 | (when (not keyout) | |
170 | ;; No context, or binding in context. Try full hash. | |
171 | (maphash hashfcn (oref tab namehash))) | |
172 | keyout)) | |
173 | ||
174 | (defmethod srecode-template-get-table-for-binding | |
175 | ((tab srecode-mode-table) binding &optional context application) | |
176 | "Find in the template name in mode table TAB, the template with BINDING. | |
177 | Optional argument CONTEXT specifies a context a particular template | |
178 | would belong to. | |
179 | Optional argument APPLICATION restricts searches to only template tables | |
180 | belonging to a specific application. If APPLICATION is nil, then only | |
181 | tables that do not belong to an application will be searched." | |
182 | (let* ((mt tab) | |
183 | (tabs (oref mt :tables)) | |
184 | (ans nil)) | |
185 | (while (and (not ans) tabs) | |
186 | (let ((app (oref (car tabs) :application))) | |
187 | (when (or (and (not application) (null app)) | |
188 | (and application (eq app application))) | |
189 | (setq ans (srecode-template-get-table-for-binding | |
190 | (car tabs) binding context))) | |
191 | (setq tabs (cdr tabs)))) | |
192 | (or ans | |
193 | ;; Recurse to the default. | |
194 | (when (not (equal (oref tab :major-mode) 'default)) | |
195 | (srecode-template-get-table-for-binding | |
196 | (srecode-get-mode-table 'default) binding context))))) | |
197 | ;;; Interactive | |
198 | ;; | |
199 | ;; Interactive queries into the template data. | |
200 | ;; | |
201 | (defvar srecode-read-template-name-history nil | |
202 | "History for completing reads for template names.") | |
203 | ||
204 | (defun srecode-all-template-hash (&optional mode hash) | |
205 | "Create a hash table of all the currently available templates. | |
206 | Optional argument MODE is the major mode to look for. | |
207 | Optional argument HASH is the hash table to fill in." | |
208 | (let* ((mhash (or hash (make-hash-table :test 'equal))) | |
209 | (mmode (or mode major-mode)) | |
210 | (mp (get-mode-local-parent mmode)) | |
211 | ) | |
212 | ;; Get the parent hash table filled into our current hash. | |
213 | (when (not (eq mode 'default)) | |
214 | (if mp | |
215 | (srecode-all-template-hash mp mhash) | |
216 | (srecode-all-template-hash 'default mhash))) | |
217 | ;; Load up the hash table for our current mode. | |
218 | (let* ((mt (srecode-get-mode-table mmode)) | |
219 | (tabs (when mt (oref mt :tables))) | |
220 | ) | |
221 | (while tabs | |
222 | ;; Exclude templates for a perticular application. | |
223 | (when (not (oref (car tabs) :application)) | |
224 | (maphash (lambda (key temp) | |
225 | (puthash key temp mhash) | |
226 | ) | |
227 | (oref (car tabs) namehash))) | |
228 | (setq tabs (cdr tabs))) | |
229 | mhash))) | |
230 | ||
231 | (defun srecode-calculate-default-template-string (hash) | |
232 | "Calculate the name of the template to use as a DEFAULT. | |
233 | Templates are read from HASH. | |
234 | Context into which the template is inserted is calculated | |
235 | with `srecode-calculate-context'." | |
236 | (let* ((ctxt (srecode-calculate-context)) | |
237 | (ans (concat (nth 0 ctxt) ":" (nth 1 ctxt)))) | |
238 | (if (gethash ans hash) | |
239 | ans | |
240 | ;; No hash at the specifics, at least offer | |
241 | ;; the prefix for the completing read | |
242 | (concat (nth 0 ctxt) ":")))) | |
243 | ||
244 | (defun srecode-read-template-name (prompt &optional initial hist default) | |
245 | "Completing read for Semantic Recoder template names. | |
246 | PROMPT is used to query for the name of the template desired. | |
247 | INITIAL is the initial string to use. | |
248 | HIST is a history variable to use. | |
249 | DEFAULT is what to use if the user presses RET." | |
250 | (srecode-load-tables-for-mode major-mode) | |
251 | (let* ((hash (srecode-all-template-hash)) | |
252 | (def (or initial | |
253 | (srecode-calculate-default-template-string hash)))) | |
254 | (completing-read prompt hash | |
255 | nil t def | |
256 | (or hist | |
257 | 'srecode-read-template-name-history)))) | |
258 | ||
259 | (provide 'srecode/find) | |
260 | ||
3999968a | 261 | ;; arch-tag: 49d18e58-45a0-48f5-92e1-4a1dcd4e36a6 |
4d902e6f | 262 | ;;; srecode/find.el ends here |