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comparison: ui/motif/text.c

ui/motif/text.c

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1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2014 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31
32 #include "text.h"
33 #include "container.h"
34
35
36 UIWIDGET ui_textarea_var(UiObject *obj, UiVar *var) {
37 UiContainer *ct = uic_get_current_container(obj);
38 int n = 0;
39 Arg args[16];
40
41 //XtSetArg(args[n], XmNeditable, TRUE);
42 //n++;
43 XtSetArg(args[n], XmNeditMode, XmMULTI_LINE_EDIT);
44 n++;
45
46 Widget parent = ct->prepare(ct, args, &n, TRUE);
47 Widget text_area = XmCreateScrolledText(parent, "text_area", args, n);
48 ct->add(ct, XtParent(text_area));
49 XtManageChild(text_area);
50
51 UiTextArea *uitext = ucx_mempool_malloc(
52 obj->ctx->mempool,
53 sizeof(UiTextArea));
54 uitext->ctx = obj->ctx;
55 uitext->last_selection_state = 0;
56 XtAddCallback(
57 text_area,
58 XmNmotionVerifyCallback,
59 (XtCallbackProc)ui_text_selection_callback,
60 uitext);
61
62 // bind value
63 if(var->value) {
64 UiText *value = var->value;
65 if(value->value.ptr) {
66 XmTextSetString(text_area, value->value.ptr);
67 value->value.free(value->value.ptr);
68 }
69
70 value->set = ui_textarea_set;
71 value->get = ui_textarea_get;
72 value->getsubstr = ui_textarea_getsubstr;
73 value->insert = ui_textarea_insert;
74 value->setposition = ui_textarea_setposition;
75 value->position = ui_textarea_position;
76 value->selection = ui_textarea_selection;
77 value->length = ui_textarea_length;
78 value->value.ptr = NULL;
79 value->obj = text_area;
80
81 if(!value->undomgr) {
82 value->undomgr = ui_create_undomgr();
83 }
84
85 XtAddCallback(
86 text_area,
87 XmNmodifyVerifyCallback,
88 (XtCallbackProc)ui_text_modify_callback,
89 var);
90 }
91
92 return text_area;
93 }
94
95 UIWIDGET ui_textarea(UiObject *obj, UiText *value) {
96 UiVar *var = malloc(sizeof(UiVar));
97 var->value = value;
98 var->type = UI_VAR_SPECIAL;
99 return ui_textarea_var(obj, var);
100 }
101
102 UIWIDGET ui_textarea_nv(UiObject *obj, char *varname) {
103 UiVar *var = uic_create_var(obj->ctx, varname, UI_VAR_TEXT);
104 if(var) {
105 return ui_textarea_var(obj, var);
106 } else {
107 // TODO: error
108 }
109 return NULL;
110 }
111
112 char* ui_textarea_get(UiText *text) {
113 if(text->value.ptr) {
114 text->value.free(text->value.ptr);
115 }
116 char *str = XmTextGetString(text->obj);
117 text->value.ptr = str;
118 text->value.free = (ui_freefunc)XtFree;
119 return str;
120 }
121
122 void ui_textarea_set(UiText *text, char *str) {
123 XmTextSetString(text->obj, str);
124 if(text->value.ptr) {
125 text->value.free(text->value.ptr);
126 }
127 text->value.ptr = NULL;
128 }
129
130 char* ui_textarea_getsubstr(UiText *text, int begin, int end) {
131 if(text->value.ptr) {
132 text->value.free(text->value.ptr);
133 }
134 int length = end - begin;
135 char *str = XtMalloc(length + 1);
136 XmTextGetSubstring(text->obj, begin, length, length + 1, str);
137 text->value.ptr = str;
138 text->value.free = (ui_freefunc)XtFree;
139 return str;
140 }
141
142 void ui_textarea_insert(UiText *text, int pos, char *str) {
143 text->value.ptr = NULL;
144 XmTextInsert(text->obj, pos, str);
145 if(text->value.ptr) {
146 text->value.free(text->value.ptr);
147 }
148 }
149
150 void ui_textarea_setposition(UiText *text, int pos) {
151 XmTextSetInsertionPosition(text->obj, pos);
152 }
153
154 int ui_textarea_position(UiText *text) {
155 long begin;
156 long end;
157 XmTextGetSelectionPosition(text->obj, &begin, &end);
158 text->pos = begin;
159 return text->pos;
160 }
161
162 void ui_textarea_selection(UiText *text, int *begin, int *end) {
163 XmTextGetSelectionPosition(text->obj, (long*)begin, (long*)end);
164 }
165
166 int ui_textarea_length(UiText *text) {
167 return (int)XmTextGetLastPosition(text->obj);
168 }
169
170
171 void ui_text_set(UiText *text, char *str) {
172 if(text->set) {
173 text->set(text, str);
174 } else {
175 if(text->value.ptr) {
176 text->value.free(text->value.ptr);
177 }
178 text->value.ptr = XtNewString(str);
179 text->value.free = (ui_freefunc)XtFree;
180 }
181 }
182
183 char* ui_text_get(UiText *text) {
184 if(text->get) {
185 return text->get(text);
186 } else {
187 return text->value.ptr;
188 }
189 }
190
191
192 UiUndoMgr* ui_create_undomgr() {
193 UiUndoMgr *mgr = malloc(sizeof(UiUndoMgr));
194 mgr->begin = NULL;
195 mgr->cur = NULL;
196 mgr->length = 0;
197 mgr->event = 1;
198 return mgr;
199 }
200
201 void ui_text_selection_callback(
202 Widget widget,
203 UiTextArea *textarea,
204 XtPointer data)
205 {
206 long left = 0;
207 long right = 0;
208 XmTextGetSelectionPosition(widget, &left, &right);
209 int sel = left < right ? 1 : 0;
210 if(sel != textarea->last_selection_state) {
211 if(sel) {
212 ui_set_group(textarea->ctx, UI_GROUP_SELECTION);
213 } else {
214 ui_unset_group(textarea->ctx, UI_GROUP_SELECTION);
215 }
216 }
217 textarea->last_selection_state = sel;
218 }
219
220 void ui_text_modify_callback(Widget widget, UiVar *var, XtPointer data) {
221 UiText *value = var->value;
222 if(!value->obj) {
223 // TODO: bug, fix
224 return;
225 }
226 if(!value->undomgr) {
227 value->undomgr = ui_create_undomgr();
228 }
229
230 XmTextVerifyCallbackStruct *txv = (XmTextVerifyCallbackStruct*)data;
231 int type = txv->text->length > 0 ? UI_TEXTBUF_INSERT : UI_TEXTBUF_DELETE;
232 UiUndoMgr *mgr = value->undomgr;
233 if(!mgr->event) {
234 return;
235 }
236
237 char *text = txv->text->ptr;
238 int length = txv->text->length;
239
240 if(mgr->cur) {
241 UcxList *elm = mgr->cur->next;
242 if(elm) {
243 mgr->cur->next = NULL;
244 while(elm) {
245 elm->prev = NULL;
246 UcxList *next = elm->next;
247 ui_free_textbuf_op(elm->data);
248 free(elm);
249 elm = next;
250 }
251 }
252
253 if(type == UI_TEXTBUF_INSERT) {
254 UiTextBufOp *last_op = mgr->cur->data;
255 if(
256 last_op->type == UI_TEXTBUF_INSERT &&
257 ui_check_insertstr(last_op->text, last_op->len, text, length) == 0)
258 {
259 // append text to last op
260 int ln = last_op->len;
261 char *newtext = malloc(ln + length + 1);
262 memcpy(newtext, last_op->text, ln);
263 memcpy(newtext+ln, text, length);
264 newtext[ln+length] = '\0';
265
266 last_op->text = newtext;
267 last_op->len = ln + length;
268 last_op->end += length;
269
270 return;
271 }
272 }
273 }
274
275 char *str;
276 if(type == UI_TEXTBUF_INSERT) {
277 str = malloc(length + 1);
278 memcpy(str, text, length);
279 str[length] = 0;
280 } else {
281 length = txv->endPos - txv->startPos;
282 str = malloc(length + 1);
283 XmTextGetSubstring(value->obj, txv->startPos, length, length+1, str);
284 }
285
286 UiTextBufOp *op = malloc(sizeof(UiTextBufOp));
287 op->type = type;
288 op->start = txv->startPos;
289 op->end = txv->endPos + 1;
290 op->len = length;
291 op->text = str;
292
293 UcxList *elm = ucx_list_append(NULL, op);
294 mgr->cur = elm;
295 mgr->begin = ucx_list_concat(mgr->begin, elm);
296 }
297
298 int ui_check_insertstr(char *oldstr, int oldlen, char *newstr, int newlen) {
299 // return 1 if oldstr + newstr are one word
300
301 int has_space = 0;
302 for(int i=0;i<oldlen;i++) {
303 if(oldstr[i] < 33) {
304 has_space = 1;
305 break;
306 }
307 }
308
309 for(int i=0;i<newlen;i++) {
310 if(has_space && newstr[i] > 32) {
311 return 1;
312 }
313 }
314
315 return 0;
316 }
317
318 void ui_free_textbuf_op(UiTextBufOp *op) {
319 if(op->text) {
320 free(op->text);
321 }
322 free(op);
323 }
324
325
326 void ui_text_undo(UiText *value) {
327 UiUndoMgr *mgr = value->undomgr;
328
329 if(mgr->cur) {
330 UiTextBufOp *op = mgr->cur->data;
331 mgr->event = 0;
332 switch(op->type) {
333 case UI_TEXTBUF_INSERT: {
334 XmTextReplace(value->obj, op->start, op->end, "");
335 break;
336 }
337 case UI_TEXTBUF_DELETE: {
338 XmTextInsert(value->obj, op->start, op->text);
339 break;
340 }
341 }
342 mgr->event = 1;
343 mgr->cur = mgr->cur->prev;
344 }
345 }
346
347 void ui_text_redo(UiText *value) {
348 UiUndoMgr *mgr = value->undomgr;
349
350 UcxList *elm = NULL;
351 if(mgr->cur) {
352 if(mgr->cur->next) {
353 elm = mgr->cur->next;
354 }
355 } else if(mgr->begin) {
356 elm = mgr->begin;
357 }
358
359 if(elm) {
360 UiTextBufOp *op = elm->data;
361 mgr->event = 0;
362 switch(op->type) {
363 case UI_TEXTBUF_INSERT: {
364 XmTextInsert(value->obj, op->start, op->text);
365 break;
366 }
367 case UI_TEXTBUF_DELETE: {
368 XmTextReplace(value->obj, op->start, op->end, "");
369 break;
370 }
371 }
372 mgr->event = 1;
373 mgr->cur = elm;
374 }
375 }
376
377
378 /* ------------------------- textfield ------------------------- */
379
380 static UIWIDGET create_textfield(UiObject *obj, int width, UiBool frameless, UiBool password, UiString *value) {
381 UiContainer *ct = uic_get_current_container(obj);
382 int n = 0;
383 Arg args[16];
384 XtSetArg(args[n], XmNeditMode, XmSINGLE_LINE_EDIT);
385 n++;
386 if(width > 0) {
387 XtSetArg(args[n], XmNcolumns, width / 2 + 1);
388 n++;
389 }
390 if(frameless) {
391 XtSetArg(args[n], XmNshadowThickness, 0);
392 n++;
393 }
394 if(password) {
395 // TODO
396 }
397
398 Widget parent = ct->prepare(ct, args, &n, FALSE);
399 Widget textfield = XmCreateText(parent, "text_field", args, n);
400 ct->add(ct, textfield);
401 XtManageChild(textfield);
402
403 // bind value
404 if(value) {
405 if(value->value.ptr) {
406 XmTextSetString(textfield, value->value.ptr);
407 value->value.free(value->value.ptr);
408 }
409
410 value->set = ui_textfield_set;
411 value->get = ui_textfield_get;
412 value->value.ptr = NULL;
413 value->obj = textfield;
414 }
415
416 return textfield;
417 }
418
419 static UIWIDGET create_textfield_nv(UiObject *obj, int width, UiBool frameless, UiBool password, char *varname) {
420 UiVar *var = uic_create_var(obj->ctx, varname, UI_VAR_STRING);
421 if(var) {
422 UiString *value = var->value;
423 return ui_textfield(obj, value);
424 } else {
425 // TODO: error
426 }
427 return NULL;
428 }
429
430 UIWIDGET ui_textfield(UiObject *obj, UiString *value) {
431 return create_textfield(obj, 0, FALSE, FALSE, value);
432 }
433
434 UIWIDGET ui_textfield_nv(UiObject *obj, char *varname) {
435 return create_textfield_nv(obj, 0, FALSE, FALSE, varname);
436 }
437
438 UIWIDGET ui_textfield_w(UiObject *obj, int width, UiString *value) {
439 return create_textfield(obj, width, FALSE, FALSE, value);
440 }
441
442 UIWIDGET ui_textfield_wnv(UiObject *obj, int width, char *varname) {
443 return create_textfield_nv(obj, width, FALSE, FALSE, varname);
444 }
445
446 UIWIDGET ui_frameless_textfield(UiObject *obj, UiString *value) {
447 return create_textfield(obj, 0, TRUE, FALSE, value);
448 }
449
450 UIWIDGET ui_frameless_textfield_nv(UiObject *obj, char *varname) {
451 return create_textfield_nv(obj, 0, TRUE, FALSE, varname);
452 }
453
454 UIWIDGET ui_passwordfield(UiObject *obj, UiString *value) {
455 return create_textfield(obj, 0, FALSE, TRUE, value);
456 }
457
458 UIWIDGET ui_passwordfield_nv(UiObject *obj, char *varname) {
459 return create_textfield_nv(obj, 0, FALSE, TRUE, varname);
460 }
461
462 UIWIDGET ui_passwordfield_w(UiObject *obj, int width, UiString *value) {
463 return create_textfield(obj, width, FALSE, TRUE, value);
464 }
465
466 UIWIDGET ui_passwordfield_wnv(UiObject *obj, int width, char *varname) {
467 return create_textfield_nv(obj, width, FALSE, TRUE, varname);
468 }
469
470
471 char* ui_textfield_get(UiString *str) {
472 if(str->value.ptr) {
473 str->value.free(str->value.ptr);
474 }
475 char *value = XmTextGetString(str->obj);
476 str->value.ptr = value;
477 str->value.free = (ui_freefunc)XtFree;
478 return value;
479 }
480
481 void ui_textfield_set(UiString *str, char *value) {
482 XmTextSetString(str->obj, value);
483 if(str->value.ptr) {
484 str->value.free(str->value.ptr);
485 }
486 str->value.ptr = NULL;
487 }
488

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