Mercurial > ~mikael > mcabber > hg
annotate mcabber/src/hbuf.c @ 733:c502bfe67c31
Fix highlighting of outgoing multi-line messages
| author | Mikael Berthe <mikael@lilotux.net> |
|---|---|
| date | Thu, 09 Mar 2006 19:25:31 +0100 |
| parents | 39f67cade02c |
| children | 5d4ad1d77da4 |
| rev | line source |
|---|---|
| 71 | 1 /* |
| 2 * hbuf.c -- History buffer implementation | |
| 393 | 3 * |
| 699 | 4 * Copyright (C) 2005, 2006 Mikael Berthe <bmikael@lists.lilotux.net> |
| 71 | 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 | |
|
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22 #define _GNU_SOURCE /* We need glibc for strptime */ |
| 71 | 23 #include <string.h> |
| 24 | |
| 25 #include "hbuf.h" | |
| 26 | |
| 27 | |
| 28 /* This is a private structure type */ | |
| 29 | |
| 30 typedef struct { | |
| 31 char *ptr; | |
| 182 | 32 char *ptr_end; // beginning of the block |
| 33 char *ptr_end_alloc; // end of the current persistent block | |
| 71 | 34 guchar flags; |
| 35 | |
| 36 // XXX This should certainly be a pointer, and be allocated only when needed | |
| 37 // (for ex. when HBB_FLAG_PERSISTENT is set). | |
| 38 struct { // hbuf_line_info | |
| 184 | 39 time_t timestamp; |
| 40 guchar flags; | |
| 41 } prefix; | |
| 71 | 42 } hbuf_block; |
| 43 | |
| 44 | |
| 184 | 45 // hbuf_add_line(p_hbuf, text, prefix_flags, width) |
| 71 | 46 // Add a line to the given buffer. If width is not null, then lines are |
| 47 // wrapped at this length. | |
| 48 // | |
| 49 // Note 1: Splitting according to width won't work if there are tabs; they | |
| 50 // should be expanded before. | |
| 51 // Note 2: width does not include the ending \0. | |
| 184 | 52 void hbuf_add_line(GList **p_hbuf, const char *text, time_t timestamp, |
| 53 guint prefix_flags, guint width) | |
| 71 | 54 { |
| 55 GList *hbuf = *p_hbuf; | |
| 56 char *line, *cr, *end; | |
| 83 | 57 hbuf_block *hbuf_block_elt; |
| 71 | 58 |
| 59 if (!text) return; | |
| 60 | |
| 83 | 61 hbuf_block_elt = g_new0(hbuf_block, 1); |
| 184 | 62 hbuf_block_elt->prefix.timestamp = timestamp; |
| 63 hbuf_block_elt->prefix.flags = prefix_flags; | |
| 71 | 64 if (!hbuf) { |
| 390 | 65 hbuf_block_elt->ptr = g_new(char, HBB_BLOCKSIZE); |
| 71 | 66 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
| 182 | 67 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
| 71 | 68 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
| 69 } else { | |
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70 hbuf_block *hbuf_b_prev; |
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71 // Set p_hbuf to the end of the list, to speed up history loading |
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72 // (or CPU time will be used by g_list_last() for each line) |
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73 hbuf = *p_hbuf = g_list_last(*p_hbuf); |
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74 hbuf_b_prev = hbuf->data; |
| 71 | 75 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end; |
| 76 hbuf_block_elt->flags = HBB_FLAG_PERSISTENT; | |
| 182 | 77 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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78 g_list_append(*p_hbuf, hbuf_block_elt); |
| 71 | 79 } |
| 80 | |
| 81 if (strlen(text) >= HBB_BLOCKSIZE) { | |
| 82 // Too long | |
| 83 text = "[ERR:LINE_TOO_LONG]"; | |
| 197 | 84 hbuf_block_elt->prefix.flags |= HBB_PREFIX_INFO; |
| 71 | 85 } |
| 182 | 86 if (hbuf_block_elt->ptr + strlen(text) >= hbuf_block_elt->ptr_end_alloc) { |
| 71 | 87 // Too long for the current allocated bloc, we need another one |
| 390 | 88 hbuf_block_elt->ptr = g_new0(char, HBB_BLOCKSIZE); |
| 71 | 89 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
| 182 | 90 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
| 71 | 91 } |
| 92 | |
| 93 line = hbuf_block_elt->ptr; | |
| 94 // Ok, now we can copy the text.. | |
| 95 strcpy(line, text); | |
| 96 hbuf_block_elt->ptr_end = line + strlen(line) + 1; | |
| 97 end = hbuf_block_elt->ptr_end; | |
| 98 | |
| 99 // Let's add non-persistent blocs if necessary | |
| 100 // - If there are '\n' in the string | |
| 101 // - If length > width (and width != 0) | |
| 102 cr = strchr(line, '\n'); | |
| 103 while (cr || (width && strlen(line) > width)) { | |
| 104 hbuf_block *hbuf_b_prev = hbuf_block_elt; | |
| 105 | |
| 106 if (!width || (cr && (cr - line <= (int)width))) { | |
| 107 // Carriage return | |
| 108 *cr = 0; | |
| 109 hbuf_block_elt->ptr_end = cr; | |
| 110 // Create another persistent block | |
| 111 hbuf_block_elt = g_new0(hbuf_block, 1); | |
| 112 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end + 1; // == cr+1 | |
| 113 hbuf_block_elt->ptr_end = end; | |
| 114 hbuf_block_elt->flags = HBB_FLAG_PERSISTENT; | |
| 182 | 115 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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116 g_list_append(*p_hbuf, hbuf_block_elt); |
| 71 | 117 line = hbuf_block_elt->ptr; |
| 118 } else { | |
| 119 // We need to break where we can find a space char | |
| 120 char *br; // break pointer | |
| 121 for (br = line + width; br > line && *br != 32 && *br != 9; br--) | |
| 122 ; | |
| 123 if (br <= line) | |
| 124 br = line + width; | |
| 125 else | |
| 126 br++; | |
| 127 hbuf_block_elt->ptr_end = br; | |
| 128 // Create another block, non-persistent | |
| 129 hbuf_block_elt = g_new0(hbuf_block, 1); | |
| 130 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end; // == br | |
| 131 hbuf_block_elt->ptr_end = end; | |
| 132 hbuf_block_elt->flags = 0; | |
| 182 | 133 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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134 g_list_append(*p_hbuf, hbuf_block_elt); |
| 71 | 135 line = hbuf_block_elt->ptr; |
| 136 } | |
| 137 cr = strchr(line, '\n'); | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 // hbuf_free() | |
| 142 // Destroys all hbuf list. | |
| 143 void hbuf_free(GList **p_hbuf) | |
| 144 { | |
| 145 hbuf_block *hbuf_b_elt; | |
| 146 GList *hbuf_elt; | |
| 147 GList *first_elt = g_list_first(*p_hbuf); | |
| 148 | |
| 149 for (hbuf_elt = first_elt; hbuf_elt; hbuf_elt = g_list_next(hbuf_elt)) { | |
| 150 hbuf_b_elt = (hbuf_block*)(hbuf_elt->data); | |
| 151 if (hbuf_b_elt->flags & HBB_FLAG_ALLOC) { | |
| 152 g_free(hbuf_b_elt->ptr); | |
| 153 } | |
| 390 | 154 g_free(hbuf_b_elt); |
| 71 | 155 } |
| 156 | |
| 157 g_list_free(*p_hbuf); | |
| 158 *p_hbuf = NULL; | |
| 159 } | |
| 160 | |
| 161 // hbuf_rebuild() | |
| 162 // Rebuild all hbuf list, with the new width. | |
| 163 // If width == 0, lines are not wrapped. | |
| 164 void hbuf_rebuild(GList **p_hbuf, unsigned int width) | |
| 165 { | |
| 166 GList *first_elt, *curr_elt, *next_elt; | |
| 167 hbuf_block *hbuf_b_curr, *hbuf_b_next; | |
| 168 | |
| 150 | 169 // *p_hbuf needs to be the head of the list |
| 170 first_elt = *p_hbuf = g_list_first(*p_hbuf); | |
| 71 | 171 |
| 172 // #1 Remove non-persistent blocks (ptr_end should be updated!) | |
| 173 curr_elt = first_elt; | |
| 174 while (curr_elt) { | |
| 175 next_elt = g_list_next(curr_elt); | |
| 176 // Last element? | |
| 177 if (!next_elt) | |
| 178 break; | |
| 179 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
| 180 hbuf_b_next = (hbuf_block*)(next_elt->data); | |
| 181 // Is next line not-persistent? | |
| 182 if (!(hbuf_b_next->flags & HBB_FLAG_PERSISTENT)) { | |
| 183 hbuf_b_curr->ptr_end = hbuf_b_next->ptr_end; | |
| 390 | 184 g_free(hbuf_b_next); |
| 71 | 185 g_list_delete_link(curr_elt, next_elt); |
| 393 | 186 } else |
| 71 | 187 curr_elt = next_elt; |
| 188 } | |
| 189 // #2 Go back to head and create non-persistent blocks when needed | |
| 190 if (width) { | |
| 191 char *line, *end; | |
| 192 curr_elt = first_elt; | |
| 193 | |
| 194 while (curr_elt) { | |
| 195 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
| 196 line = hbuf_b_curr->ptr; | |
| 197 if (strlen(line) > width) { | |
| 198 hbuf_block *hbuf_b_prev = hbuf_b_curr; | |
| 199 | |
| 200 // We need to break where we can find a space char | |
| 201 char *br; // break pointer | |
| 202 for (br = line + width; br > line && *br != 32 && *br != 9; br--) | |
| 203 ; | |
| 204 if (br <= line) | |
| 205 br = line + width; | |
| 206 else | |
| 207 br++; | |
| 208 end = hbuf_b_curr->ptr_end; | |
| 209 hbuf_b_curr->ptr_end = br; | |
| 210 // Create another block, non-persistent | |
| 211 hbuf_b_curr = g_new0(hbuf_block, 1); | |
| 212 hbuf_b_curr->ptr = hbuf_b_prev->ptr_end; // == br | |
| 213 hbuf_b_curr->ptr_end = end; | |
| 214 hbuf_b_curr->flags = 0; | |
| 182 | 215 hbuf_b_curr->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
| 150 | 216 // This is OK because insert_before(NULL) == append(): |
| 217 *p_hbuf = g_list_insert_before(*p_hbuf, curr_elt->next, hbuf_b_curr); | |
| 71 | 218 } |
| 219 curr_elt = g_list_next(curr_elt); | |
| 220 } | |
| 221 } | |
| 222 } | |
| 223 | |
| 189 | 224 // hbuf_previous_persistent() |
| 225 // Returns the previous persistent block (line). If the given line is | |
| 226 // persistent, then it is returned. | |
| 227 // This function is used for example when resizing a buffer. If the top of the | |
| 228 // screen is on a non-persistent block, then a screen resize could destroy this | |
| 229 // line... | |
| 230 GList *hbuf_previous_persistent(GList *l_line) | |
| 231 { | |
| 232 hbuf_block *hbuf_b_elt; | |
| 233 | |
| 234 while (l_line) { | |
| 235 hbuf_b_elt = (hbuf_block*)l_line->data; | |
| 236 if (hbuf_b_elt->flags & HBB_FLAG_PERSISTENT) | |
| 237 return l_line; | |
| 238 l_line = g_list_previous(l_line); | |
| 239 } | |
| 240 | |
| 241 return NULL; | |
| 242 } | |
| 243 | |
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244 // hbuf_get_lines(hbuf, n) |
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245 // Returns an array of n hbb_line pointers |
| 71 | 246 // (The first line will be the line currently pointed by hbuf) |
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247 // Note: The caller should free the array and the text pointers after use. |
| 184 | 248 hbb_line **hbuf_get_lines(GList *hbuf, unsigned int n) |
| 71 | 249 { |
| 250 unsigned int i; | |
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251 hbuf_block *blk; |
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252 guchar last_persist_prefixflags = 0; |
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253 GList *last_persist; // last persistent flags |
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254 |
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255 // To be able to correctly highlight multi-line messages, |
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256 // we need to look at the last non-null prefix, which should be the first |
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257 // line of the message. |
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258 last_persist = hbuf_previous_persistent(hbuf); |
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259 while (last_persist) { |
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260 blk = (hbuf_block*)last_persist->data; |
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261 if ((blk->flags & HBB_FLAG_PERSISTENT) && blk->prefix.flags) { |
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262 last_persist_prefixflags = blk->prefix.flags; |
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263 break; |
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264 } |
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265 last_persist = g_list_previous(last_persist); |
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266 } |
| 71 | 267 |
| 184 | 268 hbb_line **array = g_new0(hbb_line*, n); |
| 269 hbb_line **array_elt = array; | |
| 71 | 270 |
| 271 for (i=0 ; i < n ; i++) { | |
| 272 if (hbuf) { | |
| 273 int maxlen; | |
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274 blk = (hbuf_block*)(hbuf->data); |
| 71 | 275 maxlen = blk->ptr_end - blk->ptr; |
| 184 | 276 *array_elt = (hbb_line*)g_new(hbb_line, 1); |
| 277 (*array_elt)->timestamp = blk->prefix.timestamp; | |
| 278 (*array_elt)->flags = blk->prefix.flags; | |
| 279 (*array_elt)->text = g_strndup(blk->ptr, maxlen); | |
| 280 | |
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281 if ((blk->flags & HBB_FLAG_PERSISTENT) && blk->prefix.flags) { |
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282 last_persist_prefixflags = blk->prefix.flags; |
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283 } else { |
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284 // Propagate hilighting flag |
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285 (*array_elt)->flags |= last_persist_prefixflags & HBB_PREFIX_HLIGHT; |
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286 } |
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287 |
| 71 | 288 hbuf = g_list_next(hbuf); |
| 289 } else | |
| 184 | 290 break; |
| 291 | |
| 292 array_elt++; | |
| 71 | 293 } |
| 294 | |
| 295 return array; | |
| 296 } | |
| 297 | |
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298 // hbuf_search(hbuf, direction, string) |
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299 // Look backward/forward for a line containing string in the history buffer |
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300 // Search starts at hbuf, and goes forward if direction == 1, backward if -1 |
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301 GList *hbuf_search(GList *hbuf, int direction, const char *string) |
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302 { |
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303 hbuf_block *blk; |
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304 |
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305 for (;;) { |
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306 if (direction > 0) |
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307 hbuf = g_list_next(hbuf); |
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308 else |
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309 hbuf = g_list_previous(hbuf); |
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310 |
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311 if (!hbuf) break; |
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312 |
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313 blk = (hbuf_block*)(hbuf->data); |
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314 // XXX blk->ptr is (maybe) not really correct, because the match should |
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315 // not be after ptr_end. We should check that... |
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316 if (strcasestr(blk->ptr, string)) |
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317 break; |
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318 } |
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319 |
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320 return hbuf; |
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321 } |
| 462 | 322 |
| 464 | 323 // hbuf_jump_date(hbuf, t) |
| 324 // Return a pointer to the first line after date t in the history buffer | |
| 325 GList *hbuf_jump_date(GList *hbuf, time_t t) | |
| 326 { | |
| 327 hbuf_block *blk; | |
| 328 | |
| 329 hbuf = g_list_first(hbuf); | |
| 330 | |
| 331 for ( ; hbuf && g_list_next(hbuf); hbuf = g_list_next(hbuf)) { | |
| 332 blk = (hbuf_block*)(hbuf->data); | |
| 333 if (blk->prefix.timestamp >= t) break; | |
| 334 } | |
| 335 | |
| 336 return hbuf; | |
| 337 } | |
| 338 | |
| 462 | 339 // hbuf_jump_percent(hbuf, pc) |
| 340 // Return a pointer to the line at % pc of the history buffer | |
| 341 GList *hbuf_jump_percent(GList *hbuf, int pc) | |
| 342 { | |
| 343 guint hlen; | |
| 344 | |
| 345 hbuf = g_list_first(hbuf); | |
| 346 hlen = g_list_length(hbuf); | |
| 347 | |
| 348 return g_list_nth(hbuf, pc*hlen/100); | |
| 349 } | |
| 576 | 350 |
| 580 | 351 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */ |