Mercurial > hg
annotate mcabber/src/hbuf.c @ 388:f211238d5812
Ctrl-l does a full refresh
* Use redrawwin() to tell curses the screen has been corrupted
* Prevent a resize from ending auto-away
author | Mikael Berthe <mikael@lilotux.net> |
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date | Fri, 29 Jul 2005 20:28:06 +0100 |
parents | dd9e2eb52916 |
children | 468c9cac2798 |
rev | line source |
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71 | 1 /* |
2 * hbuf.c -- History buffer implementation | |
3 * | |
4 * Copyright (C) 2005 Mikael Berthe <bmikael@lists.lilotux.net> | |
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) { |
153 | 65 do { |
66 hbuf_block_elt->ptr = g_new(char, HBB_BLOCKSIZE); | |
67 } while (!hbuf_block_elt->ptr); | |
71 | 68 hbuf_block_elt->flags = HBB_FLAG_ALLOC | HBB_FLAG_PERSISTENT; |
182 | 69 hbuf_block_elt->ptr_end_alloc = hbuf_block_elt->ptr + HBB_BLOCKSIZE; |
71 | 70 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
71 } else { | |
72 hbuf_block *hbuf_b_prev = g_list_last(hbuf)->data; | |
73 hbuf_block_elt->ptr = hbuf_b_prev->ptr_end; | |
74 hbuf_block_elt->flags = HBB_FLAG_PERSISTENT; | |
182 | 75 hbuf_block_elt->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
71 | 76 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
77 } | |
78 | |
79 if (strlen(text) >= HBB_BLOCKSIZE) { | |
80 // Too long | |
81 text = "[ERR:LINE_TOO_LONG]"; | |
197 | 82 hbuf_block_elt->prefix.flags |= HBB_PREFIX_INFO; |
71 | 83 } |
182 | 84 if (hbuf_block_elt->ptr + strlen(text) >= hbuf_block_elt->ptr_end_alloc) { |
71 | 85 // Too long for the current allocated bloc, we need another one |
153 | 86 do { |
87 hbuf_block_elt->ptr = g_new0(char, HBB_BLOCKSIZE); | |
88 } while (!hbuf_block_elt->ptr); | |
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; |
71 | 116 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
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; |
71 | 134 *p_hbuf = g_list_append(*p_hbuf, hbuf_block_elt); |
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 } | |
154 } | |
155 | |
156 g_list_free(*p_hbuf); | |
157 *p_hbuf = NULL; | |
158 } | |
159 | |
160 // hbuf_rebuild() | |
161 // Rebuild all hbuf list, with the new width. | |
162 // If width == 0, lines are not wrapped. | |
163 void hbuf_rebuild(GList **p_hbuf, unsigned int width) | |
164 { | |
165 GList *first_elt, *curr_elt, *next_elt; | |
166 hbuf_block *hbuf_b_curr, *hbuf_b_next; | |
167 | |
150 | 168 // *p_hbuf needs to be the head of the list |
169 first_elt = *p_hbuf = g_list_first(*p_hbuf); | |
71 | 170 |
171 // #1 Remove non-persistent blocks (ptr_end should be updated!) | |
172 curr_elt = first_elt; | |
173 while (curr_elt) { | |
174 next_elt = g_list_next(curr_elt); | |
175 // Last element? | |
176 if (!next_elt) | |
177 break; | |
178 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
179 hbuf_b_next = (hbuf_block*)(next_elt->data); | |
180 // Is next line not-persistent? | |
181 if (!(hbuf_b_next->flags & HBB_FLAG_PERSISTENT)) { | |
182 hbuf_b_curr->ptr_end = hbuf_b_next->ptr_end; | |
183 g_list_delete_link(curr_elt, next_elt); | |
184 } else | |
185 curr_elt = next_elt; | |
186 } | |
187 // #2 Go back to head and create non-persistent blocks when needed | |
188 if (width) { | |
189 char *line, *end; | |
190 curr_elt = first_elt; | |
191 | |
192 while (curr_elt) { | |
193 hbuf_b_curr = (hbuf_block*)(curr_elt->data); | |
194 line = hbuf_b_curr->ptr; | |
195 if (strlen(line) > width) { | |
196 hbuf_block *hbuf_b_prev = hbuf_b_curr; | |
197 | |
198 // We need to break where we can find a space char | |
199 char *br; // break pointer | |
200 for (br = line + width; br > line && *br != 32 && *br != 9; br--) | |
201 ; | |
202 if (br <= line) | |
203 br = line + width; | |
204 else | |
205 br++; | |
206 end = hbuf_b_curr->ptr_end; | |
207 hbuf_b_curr->ptr_end = br; | |
208 // Create another block, non-persistent | |
209 hbuf_b_curr = g_new0(hbuf_block, 1); | |
210 hbuf_b_curr->ptr = hbuf_b_prev->ptr_end; // == br | |
211 hbuf_b_curr->ptr_end = end; | |
212 hbuf_b_curr->flags = 0; | |
182 | 213 hbuf_b_curr->ptr_end_alloc = hbuf_b_prev->ptr_end_alloc; |
150 | 214 // This is OK because insert_before(NULL) == append(): |
215 *p_hbuf = g_list_insert_before(*p_hbuf, curr_elt->next, hbuf_b_curr); | |
71 | 216 } |
217 curr_elt = g_list_next(curr_elt); | |
218 } | |
219 } | |
220 } | |
221 | |
189 | 222 // hbuf_previous_persistent() |
223 // Returns the previous persistent block (line). If the given line is | |
224 // persistent, then it is returned. | |
225 // This function is used for example when resizing a buffer. If the top of the | |
226 // screen is on a non-persistent block, then a screen resize could destroy this | |
227 // line... | |
228 GList *hbuf_previous_persistent(GList *l_line) | |
229 { | |
230 hbuf_block *hbuf_b_elt; | |
231 | |
232 while (l_line) { | |
233 hbuf_b_elt = (hbuf_block*)l_line->data; | |
234 if (hbuf_b_elt->flags & HBB_FLAG_PERSISTENT) | |
235 return l_line; | |
236 l_line = g_list_previous(l_line); | |
237 } | |
238 | |
239 return NULL; | |
240 } | |
241 | |
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242 // hbuf_get_lines(hbuf, n) |
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243 // Returns an array of n hbb_line pointers |
71 | 244 // (The first line will be the line currently pointed by hbuf) |
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245 // Note: The caller should free the array and the text pointers after use. |
184 | 246 hbb_line **hbuf_get_lines(GList *hbuf, unsigned int n) |
71 | 247 { |
248 unsigned int i; | |
249 | |
184 | 250 hbb_line **array = g_new0(hbb_line*, n); |
251 hbb_line **array_elt = array; | |
71 | 252 |
253 for (i=0 ; i < n ; i++) { | |
254 if (hbuf) { | |
255 hbuf_block *blk = (hbuf_block*)(hbuf->data); | |
256 int maxlen; | |
257 maxlen = blk->ptr_end - blk->ptr; | |
184 | 258 *array_elt = (hbb_line*)g_new(hbb_line, 1); |
259 (*array_elt)->timestamp = blk->prefix.timestamp; | |
260 (*array_elt)->flags = blk->prefix.flags; | |
261 (*array_elt)->text = g_strndup(blk->ptr, maxlen); | |
262 | |
71 | 263 hbuf = g_list_next(hbuf); |
264 } else | |
184 | 265 break; |
266 | |
267 array_elt++; | |
71 | 268 } |
269 | |
270 return array; | |
271 } | |
272 | |
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273 // hbuf_search(hbuf, direction, string) |
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274 // Look backward/forward for a line containing string in the history buffer |
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275 // Search starts at hbuf, and goes forward if direction == 1, backward if -1 |
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276 GList *hbuf_search(GList *hbuf, int direction, const char *string) |
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277 { |
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278 hbuf_block *blk; |
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279 |
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280 for (;;) { |
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281 if (direction > 0) |
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282 hbuf = g_list_next(hbuf); |
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283 else |
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284 hbuf = g_list_previous(hbuf); |
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285 |
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286 if (!hbuf) break; |
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287 |
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288 blk = (hbuf_block*)(hbuf->data); |
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289 // XXX blk->ptr is (maybe) not really correct, because the match should |
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290 // not be after ptr_end. We should check that... |
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291 if (strcasestr(blk->ptr, string)) |
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292 break; |
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293 } |
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294 |
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295 return hbuf; |
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296 } |