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annotate mcabber/mcabber/compl.c @ 1811:e6d355e50d7a
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| author | Mikael Berthe <mikael@lilotux.net> |
|---|---|
| date | Mon, 22 Mar 2010 21:32:11 +0100 |
| parents | e2c084204583 |
| children | 8f7d7c05f275 |
| rev | line source |
|---|---|
| 94 | 1 /* |
| 2 * compl.c -- Completion system | |
| 393 | 3 * |
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4 * Copyright (C) 2005-2010 Mikael Berthe <mikael@lilotux.net> |
| 94 | 5 * |
| 6 * This program is free software; you can redistribute it and/or modify | |
| 7 * it under the terms of the GNU General Public License as published by | |
| 8 * the Free Software Foundation; either version 2 of the License, or (at | |
| 9 * your option) any later version. | |
| 10 * | |
| 11 * This program is distributed in the hope that it will be useful, but | |
| 12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License | |
| 17 * along with this program; if not, write to the Free Software | |
| 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
| 19 * USA | |
| 20 */ | |
| 21 | |
| 22 /* Usage, basically: | |
| 23 * - new_completion(); // 1. Initialization | |
| 24 * - complete(); // 2. 1st completion | |
| 25 * - cancel_completion(); // 3a. 2nd completion / cancel previous | |
| 26 * - complete(); // 3b. 2nd completion / complete | |
| 27 * ... | |
| 28 * - done_completion(); // n. finished -- free allocated areas | |
| 29 * | |
| 30 */ | |
| 31 | |
| 32 #include <string.h> | |
| 33 | |
| 34 #include "compl.h" | |
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35 #include "utf8.h" |
| 225 | 36 #include "roster.h" |
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37 #include "events.h" |
| 94 | 38 |
| 39 // Completion structure | |
| 40 typedef struct { | |
| 41 GSList *list; // list of matches | |
| 42 guint len_prefix; // length of text already typed by the user | |
| 43 guint len_compl; // length of the last completion | |
| 44 GSList *next; // pointer to next completion to try | |
| 45 } compl; | |
| 46 | |
| 47 // Category structure | |
| 48 typedef struct { | |
| 49 guint flag; | |
| 50 GSList *words; | |
| 51 } category; | |
| 52 | |
| 53 static GSList *Categories; | |
| 54 static compl *InputCompl; | |
| 55 | |
| 1607 | 56 #ifdef MODULES_ENABLE |
| 57 guint registered_cats = COMPL_CMD|COMPL_JID|COMPL_URLJID|COMPL_NAME| \ | |
| 58 COMPL_STATUS|COMPL_FILENAME|COMPL_ROSTER|COMPL_BUFFER| \ | |
| 59 COMPL_GROUP|COMPL_GROUPNAME|COMPL_MULTILINE|COMPL_ROOM| \ | |
| 60 COMPL_RESOURCE|COMPL_AUTH|COMPL_REQUEST|COMPL_EVENTS| \ | |
| 61 COMPL_EVENTSID|COMPL_PGP|COMPL_COLOR| \ | |
| 62 COMPL_OTR|COMPL_OTRPOLICY| \ | |
| 63 0; | |
| 64 | |
| 65 // compl_new_category() | |
| 66 // Reserves id for new completion category. | |
| 67 // Returns 0, if no more categories can be allocated. | |
| 68 // Note, that user should not make any assumptions about id nature, | |
| 69 // as it is likely to change in future. | |
| 70 guint compl_new_category (void) | |
| 71 { | |
| 72 guint i = 0; | |
| 73 while ((registered_cats >> i) & 1) | |
| 74 i++; | |
| 75 if (i >= sizeof (guint)*8) | |
| 76 return 0; | |
| 77 else { | |
| 78 guint id = 1 << i; | |
| 79 registered_cats |= id; | |
| 80 return id; | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 // compl_del_category (id) | |
| 85 // Frees reserved id for category. | |
| 86 // Note, that for now it not validates its input, so, be careful | |
| 87 // and specify exactly what you get from compl_new_category. | |
| 88 void compl_del_category (guint id) | |
| 89 { | |
| 90 registered_cats &= ~id; | |
| 91 } | |
| 92 #endif | |
| 93 | |
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94 // new_completion(prefix, compl_cat, suffix) |
| 94 | 95 // . prefix = beginning of the word, typed by the user |
| 96 // . compl_cat = pointer to a completion category list (list of *char) | |
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97 // . suffix = string to append to all completion possibilities (i.e. ":") |
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98 // Set the InputCompl pointer to an allocated compl structure. |
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99 // done_completion() must be called when finished. |
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100 // Returns the number of possible completions. |
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101 guint new_completion(const char *prefix, GSList *compl_cat, const gchar *suffix) |
| 94 | 102 { |
| 103 compl *c; | |
| 104 GSList *sl_cat; | |
| 735 | 105 size_t len = strlen(prefix); |
| 94 | 106 |
| 107 if (InputCompl) { // This should not happen, but hey... | |
| 108 cancel_completion(); | |
| 109 } | |
| 110 | |
| 111 c = g_new0(compl, 1); | |
| 112 // Build the list of matches | |
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113 for (sl_cat = compl_cat; sl_cat; sl_cat = g_slist_next(sl_cat)) { |
| 94 | 114 char *word = sl_cat->data; |
| 104 | 115 if (!strncasecmp(prefix, word, len)) { |
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116 if (strlen(word) != len) { |
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117 gchar *compval; |
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118 if (suffix) |
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119 compval = g_strdup_printf("%s%s", word+len, suffix); |
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120 else |
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121 compval = g_strdup(word+len); |
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122 c->list = g_slist_append(c->list, compval); // TODO sort |
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123 } |
| 94 | 124 } |
| 125 } | |
| 126 c->next = c->list; | |
| 127 InputCompl = c; | |
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128 return g_slist_length(c->list); |
| 94 | 129 } |
| 130 | |
| 131 // done_completion(); | |
| 132 void done_completion(void) | |
| 133 { | |
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134 GSList *clp; |
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135 |
| 98 | 136 if (!InputCompl) return; |
| 137 | |
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138 // Free the current completion list |
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139 for (clp = InputCompl->list; clp; clp = g_slist_next(clp)) |
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140 g_free(clp->data); |
| 94 | 141 g_slist_free(InputCompl->list); |
| 142 g_free(InputCompl); | |
| 143 InputCompl = NULL; | |
| 144 } | |
| 145 | |
| 146 // cancel_completion() | |
| 147 // Returns the number of chars to delete to cancel the completion | |
| 148 guint cancel_completion(void) | |
| 149 { | |
| 98 | 150 if (!InputCompl) return 0; |
| 94 | 151 return InputCompl->len_compl; |
| 152 } | |
| 153 | |
| 154 // Returns pointer to text to insert, NULL if no completion. | |
| 155 const char *complete() | |
| 156 { | |
| 157 compl* c = InputCompl; | |
| 158 char *r; | |
| 98 | 159 |
| 160 if (!InputCompl) return NULL; | |
| 161 | |
| 94 | 162 if (!c->next) { |
| 163 c->next = c->list; // back to the beginning | |
| 164 c->len_compl = 0; | |
| 165 return NULL; | |
| 166 } | |
| 167 r = (char*)c->next->data; | |
| 168 c->next = g_slist_next(c->next); | |
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169 if (!utf8_mode) { |
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170 c->len_compl = strlen(r); |
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171 } else { |
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172 char *wc; |
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173 c->len_compl = 0; |
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174 for (wc = r; *wc; wc = next_char(wc)) |
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175 c->len_compl++; |
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176 } |
| 94 | 177 return r; |
| 178 } | |
| 179 | |
| 180 | |
| 181 /* Categories functions */ | |
| 182 | |
| 95 | 183 // compl_add_category_word(categ, command) |
| 184 // Adds a keyword as a possible completion in category categ. | |
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185 void compl_add_category_word(guint categ, const gchar *word) |
| 94 | 186 { |
| 187 GSList *sl_cat; | |
| 188 category *cat; | |
| 121 | 189 char *nword; |
| 94 | 190 // Look for category |
| 191 for (sl_cat=Categories; sl_cat; sl_cat = g_slist_next(sl_cat)) { | |
| 192 if (categ == ((category*)sl_cat->data)->flag) | |
| 193 break; | |
| 194 } | |
| 195 if (!sl_cat) { // Category not found, let's create it | |
| 196 cat = g_new0(category, 1); | |
| 197 cat->flag = categ; | |
| 198 Categories = g_slist_append(Categories, cat); | |
| 199 } else | |
| 200 cat = (category*)sl_cat->data; | |
| 201 | |
| 121 | 202 // If word is not space-terminated, we add one trailing space |
| 203 for (nword = (char*)word; *nword; nword++) | |
| 204 ; | |
| 205 if (nword > word) nword--; | |
| 206 if (*nword != ' ') { // Add a space | |
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207 nword = g_strdup_printf("%s ", word); |
| 121 | 208 } else { // word is fine |
| 209 nword = g_strdup(word); | |
| 210 } | |
| 211 | |
| 94 | 212 // TODO Check word does not already exist |
| 121 | 213 cat->words = g_slist_append(cat->words, nword); // TODO sort |
| 94 | 214 } |
| 215 | |
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216 // compl_del_category_word(categ, command) |
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217 // Removes a keyword from category categ in completion list. |
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218 void compl_del_category_word(guint categ, const gchar *word) |
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219 { |
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220 GSList *sl_cat, *sl_elt; |
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221 category *cat; |
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222 char *nword; |
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223 // Look for category |
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224 for (sl_cat=Categories; sl_cat; sl_cat = g_slist_next(sl_cat)) { |
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225 if (categ == ((category*)sl_cat->data)->flag) |
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226 break; |
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227 } |
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228 if (!sl_cat) return; // Category not found, finished! |
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229 |
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230 cat = (category*)sl_cat->data; |
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231 |
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232 // If word is not space-terminated, we add one trailing space |
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233 for (nword = (char*)word; *nword; nword++) |
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234 ; |
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235 if (nword > word) nword--; |
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236 if (*nword != ' ') { // Add a space |
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237 nword = g_strdup_printf("%s ", word); |
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238 } else { // word is fine |
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239 nword = g_strdup(word); |
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240 } |
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241 |
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242 sl_elt = cat->words; |
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243 while (sl_elt) { |
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244 if (!strcasecmp((char*)sl_elt->data, nword)) { |
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245 g_free(sl_elt->data); |
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246 cat->words = g_slist_delete_link(cat->words, sl_elt); |
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247 break; // Only remove first occurence |
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248 } |
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249 sl_elt = g_slist_next(sl_elt); |
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250 } |
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251 } |
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252 |
| 95 | 253 // compl_get_category_list() |
| 254 // Returns a slist of all words in the categories specified by the given flags | |
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255 // Iff this function sets *dynlist to TRUE, then the caller must free the |
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256 // whole list after use. |
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257 GSList *compl_get_category_list(guint cat_flags, guint *dynlist) |
| 94 | 258 { |
| 259 GSList *sl_cat; | |
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260 |
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261 *dynlist = FALSE; |
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262 |
| 94 | 263 // Look for category |
| 264 // XXX Actually that's not that simple... cat_flags can be a combination | |
| 265 // of several flags! | |
| 266 for (sl_cat=Categories; sl_cat; sl_cat = g_slist_next(sl_cat)) { | |
| 267 if (cat_flags == ((category*)sl_cat->data)->flag) | |
| 268 break; | |
| 269 } | |
| 270 if (sl_cat) // Category was found, easy... | |
| 271 return ((category*)sl_cat->data)->words; | |
| 272 | |
| 225 | 273 // Handle dynamic SLists |
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274 *dynlist = TRUE; |
| 225 | 275 if (cat_flags == COMPL_GROUPNAME) { |
| 276 return compl_list(ROSTER_TYPE_GROUP); | |
| 277 } | |
| 278 if (cat_flags == COMPL_JID) { | |
| 279 return compl_list(ROSTER_TYPE_USER); | |
| 280 } | |
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281 if (cat_flags == COMPL_RESOURCE) { |
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282 return buddy_getresources_locale(NULL); |
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283 } |
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284 if (cat_flags == COMPL_EVENTSID) { |
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285 GSList *compl = evs_geteventslist(); |
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286 GSList *cel; |
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287 for (cel = compl; cel; cel = cel->next) |
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288 cel->data = g_strdup(cel->data); |
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289 compl = g_slist_append(compl, g_strdup("list")); |
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290 return compl; |
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291 } |
| 225 | 292 |
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293 *dynlist = FALSE; |
| 94 | 294 return NULL; |
| 295 } | |
| 296 | |
| 1811 | 297 /* vim: set expandtab cindent cinoptions=>2\:2(0 sw=2 ts=2: For Vim users... */ |