Mercurial > ~mikael > mcabber > hg
annotate mcabber/src/hbuf.c @ 932:fc6aaa223650
Fix a few problems with non-UTF-8 locales
| author | Mikael Berthe <mikael@lilotux.net> |
|---|---|
| date | Sat, 08 Jul 2006 09:43:18 +0200 |
| parents | a75f7a13df7b |
| children | c6bd42119c31 |
| 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 | |
| 22 #include <string.h> | |
| 23 | |
| 24 #include "hbuf.h" | |
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25 #include "utils.h" |
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26 #include "utf8.h" |
| 71 | 27 |
| 28 | |
| 29 /* This is a private structure type */ | |
| 30 | |
| 31 typedef struct { | |
| 32 char *ptr; | |
| 182 | 33 char *ptr_end; // beginning of the block |
| 34 char *ptr_end_alloc; // end of the current persistent block | |
| 71 | 35 guchar flags; |
| 36 | |
| 37 // XXX This should certainly be a pointer, and be allocated only when needed | |
| 38 // (for ex. when HBB_FLAG_PERSISTENT is set). | |
| 39 struct { // hbuf_line_info | |
| 184 | 40 time_t timestamp; |
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41 guint flags; |
| 184 | 42 } prefix; |
| 71 | 43 } hbuf_block; |
| 44 | |
| 45 | |
| 184 | 46 // hbuf_add_line(p_hbuf, text, prefix_flags, width) |
| 71 | 47 // Add a line to the given buffer. If width is not null, then lines are |
| 48 // wrapped at this length. | |
| 49 // | |
| 50 // Note 1: Splitting according to width won't work if there are tabs; they | |
| 51 // should be expanded before. | |
| 52 // Note 2: width does not include the ending \0. | |
| 184 | 53 void hbuf_add_line(GList **p_hbuf, const char *text, time_t timestamp, |
| 54 guint prefix_flags, guint width) | |
| 71 | 55 { |
| 56 GList *hbuf = *p_hbuf; | |
| 57 char *line, *cr, *end; | |
| 83 | 58 hbuf_block *hbuf_block_elt; |
| 71 | 59 |
| 60 if (!text) return; | |
| 61 | |
| 83 | 62 hbuf_block_elt = g_new0(hbuf_block, 1); |
| 184 | 63 hbuf_block_elt->prefix.timestamp = timestamp; |
| 64 hbuf_block_elt->prefix.flags = prefix_flags; | |
| 71 | 65 if (!hbuf) { |
| 390 | 66 hbuf_block_elt->ptr = g_new(char, HBB_BLOCKSIZE); |
| 71 | 67 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
| 182 | 68 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
| 71 | 69 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
| 70 } else { | |
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71 hbuf_block *hbuf_b_prev; |
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72 // Set p_hbuf to the end of the list, to speed up history loading |
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73 // (or CPU time will be used by g_list_last() for each line) |
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74 hbuf = *p_hbuf = g_list_last(*p_hbuf); |
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75 hbuf_b_prev = hbuf->data; |
| 71 | 76 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end; |
| 77 hbuf_block_elt->flags = HBB_FLAG_PERSISTENT; | |
| 182 | 78 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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79 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
| 71 | 80 } |
| 81 | |
| 82 if (strlen(text) >= HBB_BLOCKSIZE) { | |
| 83 // Too long | |
| 84 text = "[ERR:LINE_TOO_LONG]"; | |
| 197 | 85 hbuf_block_elt->prefix.flags |= HBB_PREFIX_INFO; |
| 71 | 86 } |
| 182 | 87 if (hbuf_block_elt->ptr + strlen(text) >= hbuf_block_elt->ptr_end_alloc) { |
| 71 | 88 // Too long for the current allocated bloc, we need another one |
| 390 | 89 hbuf_block_elt->ptr = g_new0(char, HBB_BLOCKSIZE); |
| 71 | 90 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
| 182 | 91 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
| 71 | 92 } |
| 93 | |
| 94 line = hbuf_block_elt->ptr; | |
| 95 // Ok, now we can copy the text.. | |
| 96 strcpy(line, text); | |
| 97 hbuf_block_elt->ptr_end = line + strlen(line) + 1; | |
| 98 end = hbuf_block_elt->ptr_end; | |
| 99 | |
| 100 // Let's add non-persistent blocs if necessary | |
| 101 // - If there are '\n' in the string | |
| 102 // - If length > width (and width != 0) | |
| 103 cr = strchr(line, '\n'); | |
| 104 while (cr || (width && strlen(line) > width)) { | |
| 105 hbuf_block *hbuf_b_prev = hbuf_block_elt; | |
| 106 | |
| 107 if (!width || (cr && (cr - line <= (int)width))) { | |
| 108 // Carriage return | |
| 109 *cr = 0; | |
| 110 hbuf_block_elt->ptr_end = cr; | |
| 111 // Create another persistent block | |
| 112 hbuf_block_elt = g_new0(hbuf_block, 1); | |
| 113 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end + 1; // == cr+1 | |
| 114 hbuf_block_elt->ptr_end = end; | |
| 115 hbuf_block_elt->flags = HBB_FLAG_PERSISTENT; | |
| 182 | 116 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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117 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
| 71 | 118 line = hbuf_block_elt->ptr; |
| 119 } else { | |
| 120 // We need to break where we can find a space char | |
| 121 char *br; // break pointer | |
| 122 for (br = line + width; br > line && *br != 32 && *br != 9; br--) | |
| 123 ; | |
| 124 if (br <= line) | |
| 125 br = line + width; | |
| 126 else | |
| 127 br++; | |
| 128 hbuf_block_elt->ptr_end = br; | |
| 129 // Create another block, non-persistent | |
| 130 hbuf_block_elt = g_new0(hbuf_block, 1); | |
| 131 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end; // == br | |
| 132 hbuf_block_elt->ptr_end = end; | |
| 133 hbuf_block_elt->flags = 0; | |
| 182 | 134 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
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135 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
| 71 | 136 line = hbuf_block_elt->ptr; |
| 137 } | |
| 138 cr = strchr(line, '\n'); | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 // hbuf_free() | |
| 143 // Destroys all hbuf list. | |
| 144 void hbuf_free(GList **p_hbuf) | |
| 145 { | |
| 146 hbuf_block *hbuf_b_elt; | |
| 147 GList *hbuf_elt; | |
| 148 GList *first_elt = g_list_first(*p_hbuf); | |
| 149 | |
| 150 for (hbuf_elt = first_elt; hbuf_elt; hbuf_elt = g_list_next(hbuf_elt)) { | |
| 151 hbuf_b_elt = (hbuf_block*)(hbuf_elt->data); | |
| 152 if (hbuf_b_elt->flags & HBB_FLAG_ALLOC) { | |
| 153 g_free(hbuf_b_elt->ptr); | |
| 154 } | |
| 390 | 155 g_free(hbuf_b_elt); |
| 71 | 156 } |
| 157 | |
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158 g_list_free(first_elt); |
| 71 | 159 *p_hbuf = NULL; |
| 160 } | |
| 161 | |
| 162 // hbuf_rebuild() | |
| 163 // Rebuild all hbuf list, with the new width. | |
| 164 // If width == 0, lines are not wrapped. | |
| 165 void hbuf_rebuild(GList **p_hbuf, unsigned int width) | |
| 166 { | |
| 167 GList *first_elt, *curr_elt, *next_elt; | |
| 168 hbuf_block *hbuf_b_curr, *hbuf_b_next; | |
| 169 | |
| 150 | 170 // *p_hbuf needs to be the head of the list |
| 171 first_elt = *p_hbuf = g_list_first(*p_hbuf); | |
| 71 | 172 |
| 173 // #1 Remove non-persistent blocks (ptr_end should be updated!) | |
| 174 curr_elt = first_elt; | |
| 175 while (curr_elt) { | |
| 176 next_elt = g_list_next(curr_elt); | |
| 177 // Last element? | |
| 178 if (!next_elt) | |
| 179 break; | |
| 180 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
| 181 hbuf_b_next = (hbuf_block*)(next_elt->data); | |
| 182 // Is next line not-persistent? | |
| 183 if (!(hbuf_b_next->flags & HBB_FLAG_PERSISTENT)) { | |
| 184 hbuf_b_curr->ptr_end = hbuf_b_next->ptr_end; | |
| 390 | 185 g_free(hbuf_b_next); |
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186 curr_elt = g_list_delete_link(curr_elt, next_elt); |
| 393 | 187 } else |
| 71 | 188 curr_elt = next_elt; |
| 189 } | |
| 190 // #2 Go back to head and create non-persistent blocks when needed | |
| 191 if (width) { | |
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192 char *end; |
| 71 | 193 curr_elt = first_elt; |
| 194 | |
| 195 while (curr_elt) { | |
| 196 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
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197 hbuf_block *hbuf_b_prev = hbuf_b_curr; |
| 71 | 198 |
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199 // We need to break where we can find a space char |
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200 char *br = NULL; // break pointer |
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201 char *c = hbuf_b_curr->ptr; |
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202 unsigned int cur_w = 0; |
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203 while (*c && cur_w <= width) { |
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204 if (iswblank(get_char(c))) |
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205 br = c; |
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206 cur_w += get_char_width(c); |
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207 c = next_char(c); |
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208 } |
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209 if (*c && cur_w > width) { |
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210 if (!br || br == hbuf_b_curr->ptr) |
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211 br = c; |
| 71 | 212 else |
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213 br = next_char(br); |
| 71 | 214 end = hbuf_b_curr->ptr_end; |
| 215 hbuf_b_curr->ptr_end = br; | |
| 216 // Create another block, non-persistent | |
| 217 hbuf_b_curr = g_new0(hbuf_block, 1); | |
| 218 hbuf_b_curr->ptr = hbuf_b_prev->ptr_end; // == br | |
| 219 hbuf_b_curr->ptr_end = end; | |
| 220 hbuf_b_curr->flags = 0; | |
| 182 | 221 hbuf_b_curr->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
| 150 | 222 // This is OK because insert_before(NULL) == append(): |
| 223 *p_hbuf = g_list_insert_before(*p_hbuf, curr_elt->next, hbuf_b_curr); | |
| 71 | 224 } |
| 225 curr_elt = g_list_next(curr_elt); | |
| 226 } | |
| 227 } | |
| 228 } | |
| 229 | |
| 189 | 230 // hbuf_previous_persistent() |
| 231 // Returns the previous persistent block (line). If the given line is | |
| 232 // persistent, then it is returned. | |
| 233 // This function is used for example when resizing a buffer. If the top of the | |
| 234 // screen is on a non-persistent block, then a screen resize could destroy this | |
| 235 // line... | |
| 236 GList *hbuf_previous_persistent(GList *l_line) | |
| 237 { | |
| 238 hbuf_block *hbuf_b_elt; | |
| 239 | |
| 240 while (l_line) { | |
| 241 hbuf_b_elt = (hbuf_block*)l_line->data; | |
| 242 if (hbuf_b_elt->flags & HBB_FLAG_PERSISTENT) | |
| 243 return l_line; | |
| 244 l_line = g_list_previous(l_line); | |
| 245 } | |
| 246 | |
| 247 return NULL; | |
| 248 } | |
| 249 | |
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250 // hbuf_get_lines(hbuf, n) |
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251 // Returns an array of n hbb_line pointers |
| 71 | 252 // (The first line will be the line currently pointed by hbuf) |
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253 // Note: The caller should free the array, the hbb_line pointers and the |
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254 // text pointers after use. |
| 184 | 255 hbb_line **hbuf_get_lines(GList *hbuf, unsigned int n) |
| 71 | 256 { |
| 257 unsigned int i; | |
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258 hbuf_block *blk; |
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259 guchar last_persist_prefixflags = 0; |
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260 GList *last_persist; // last persistent flags |
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261 hbb_line **array, **array_elt; |
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262 |
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263 // To be able to correctly highlight multi-line messages, |
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264 // we need to look at the last non-null prefix, which should be the first |
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265 // line of the message. |
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266 last_persist = hbuf_previous_persistent(hbuf); |
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267 while (last_persist) { |
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268 blk = (hbuf_block*)last_persist->data; |
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269 if ((blk->flags & HBB_FLAG_PERSISTENT) && blk->prefix.flags) { |
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270 last_persist_prefixflags = blk->prefix.flags; |
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271 break; |
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272 } |
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273 last_persist = g_list_previous(last_persist); |
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274 } |
| 71 | 275 |
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276 array = g_new0(hbb_line*, n); |
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277 array_elt = array; |
| 71 | 278 |
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279 for (i = 0 ; i < n ; i++) { |
| 71 | 280 if (hbuf) { |
| 281 int maxlen; | |
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282 blk = (hbuf_block*)(hbuf->data); |
| 71 | 283 maxlen = blk->ptr_end - blk->ptr; |
| 184 | 284 *array_elt = (hbb_line*)g_new(hbb_line, 1); |
| 285 (*array_elt)->timestamp = blk->prefix.timestamp; | |
| 286 (*array_elt)->flags = blk->prefix.flags; | |
| 287 (*array_elt)->text = g_strndup(blk->ptr, maxlen); | |
| 288 | |
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289 if ((blk->flags & HBB_FLAG_PERSISTENT) && blk->prefix.flags) { |
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290 last_persist_prefixflags = blk->prefix.flags; |
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291 } else { |
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292 // Propagate highlighting flag |
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293 (*array_elt)->flags |= last_persist_prefixflags & HBB_PREFIX_HLIGHT; |
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294 } |
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295 |
| 71 | 296 hbuf = g_list_next(hbuf); |
| 297 } else | |
| 184 | 298 break; |
| 299 | |
| 300 array_elt++; | |
| 71 | 301 } |
| 302 | |
| 303 return array; | |
| 304 } | |
| 305 | |
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306 // hbuf_search(hbuf, direction, string) |
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307 // Look backward/forward for a line containing string in the history buffer |
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308 // Search starts at hbuf, and goes forward if direction == 1, backward if -1 |
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309 GList *hbuf_search(GList *hbuf, int direction, const char *string) |
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310 { |
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311 hbuf_block *blk; |
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312 |
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313 for (;;) { |
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314 if (direction > 0) |
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315 hbuf = g_list_next(hbuf); |
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316 else |
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317 hbuf = g_list_previous(hbuf); |
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318 |
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319 if (!hbuf) break; |
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320 |
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321 blk = (hbuf_block*)(hbuf->data); |
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322 // XXX blk->ptr is (maybe) not really correct, because the match should |
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323 // not be after ptr_end. We should check that... |
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324 if (strcasestr(blk->ptr, string)) |
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325 break; |
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326 } |
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327 |
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328 return hbuf; |
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329 } |
| 462 | 330 |
| 464 | 331 // hbuf_jump_date(hbuf, t) |
| 332 // Return a pointer to the first line after date t in the history buffer | |
| 333 GList *hbuf_jump_date(GList *hbuf, time_t t) | |
| 334 { | |
| 335 hbuf_block *blk; | |
| 336 | |
| 337 hbuf = g_list_first(hbuf); | |
| 338 | |
| 339 for ( ; hbuf && g_list_next(hbuf); hbuf = g_list_next(hbuf)) { | |
| 340 blk = (hbuf_block*)(hbuf->data); | |
| 341 if (blk->prefix.timestamp >= t) break; | |
| 342 } | |
| 343 | |
| 344 return hbuf; | |
| 345 } | |
| 346 | |
| 462 | 347 // hbuf_jump_percent(hbuf, pc) |
| 348 // Return a pointer to the line at % pc of the history buffer | |
| 349 GList *hbuf_jump_percent(GList *hbuf, int pc) | |
| 350 { | |
| 351 guint hlen; | |
| 352 | |
| 353 hbuf = g_list_first(hbuf); | |
| 354 hlen = g_list_length(hbuf); | |
| 355 | |
| 356 return g_list_nth(hbuf, pc*hlen/100); | |
| 357 } | |
| 576 | 358 |
| 580 | 359 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */ |