Mercurial > hg
annotate mcabber/src/hbuf.c @ 768:0f6d25a02450
Add PuTTY escape keys for Ctrl-arrows
author | Mikael Berthe <mikael@lilotux.net> |
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date | Thu, 23 Mar 2006 19:11:07 +0100 |
parents | c502bfe67c31 |
children | 5d4ad1d77da4 |
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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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Add /buffer search_{backward,forward}
Mikael Berthe <mikael@lilotux.net>
parents:
368
diff
changeset
|
320 return hbuf; |
dd9e2eb52916
Add /buffer search_{backward,forward}
Mikael Berthe <mikael@lilotux.net>
parents:
368
diff
changeset
|
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... */ |