blob: 5c75ac194a941a240efaf92fc52a884c7dc36467 [file] [log] [blame]
Jan Arne Petersencba9e472012-06-21 21:52:19 +02001/*
2 * Copyright © 2012 Openismus GmbH
Jan Arne Petersen4c265182012-09-09 23:08:30 +02003 * Copyright © 2012 Intel Corporation
Jan Arne Petersencba9e472012-06-21 21:52:19 +02004 *
5 * Permission to use, copy, modify, distribute, and sell this software and
6 * its documentation for any purpose is hereby granted without fee, provided
7 * that the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of the copyright holders not be used in
10 * advertising or publicity pertaining to distribution of the software
11 * without specific, written prior permission. The copyright holders make
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied warranty.
14 *
15 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
16 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
17 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
18 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
19 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
20 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 */
23
Philipp Brüschweiler591cfca2012-07-11 22:25:29 +020024#include <assert.h>
Jan Arne Petersencba9e472012-06-21 21:52:19 +020025#include <stdio.h>
26#include <stdlib.h>
27#include <string.h>
28
29#include <linux/input.h>
30#include <cairo.h>
31
32#include "window.h"
33#include "text-client-protocol.h"
34
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +020035static const char *font_name = "sans-serif";
36static int font_size = 14;
37
38struct text_layout {
39 cairo_glyph_t *glyphs;
40 int num_glyphs;
41 cairo_text_cluster_t *clusters;
42 int num_clusters;
43 cairo_text_cluster_flags_t cluster_flags;
44 cairo_scaled_font_t *font;
45};
46
Jan Arne Petersencba9e472012-06-21 21:52:19 +020047struct text_entry {
48 struct widget *widget;
Jan Arne Petersene829adc2012-08-10 16:47:22 +020049 struct window *window;
Jan Arne Petersencba9e472012-06-21 21:52:19 +020050 char *text;
51 int active;
Jan Arne Petersen7e634a02012-09-09 23:08:36 +020052 uint32_t cursor;
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +020053 uint32_t anchor;
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +020054 char *preedit_text;
55 uint32_t preedit_cursor;
Jan Arne Petersencba9e472012-06-21 21:52:19 +020056 struct text_model *model;
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +020057 struct text_layout *layout;
Jan Arne Petersencba9e472012-06-21 21:52:19 +020058};
59
60struct editor {
Jan Arne Petersen51963742012-08-10 16:47:20 +020061 struct text_model_factory *text_model_factory;
Jan Arne Petersencba9e472012-06-21 21:52:19 +020062 struct display *display;
63 struct window *window;
64 struct widget *widget;
65 struct text_entry *entry;
66 struct text_entry *editor;
67};
68
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +020069static struct text_layout *
70text_layout_create(void)
71{
72 struct text_layout *layout;
73 cairo_surface_t *surface;
74 cairo_t *cr;
75
76 layout = malloc(sizeof *layout);
77 if (!layout)
78 return NULL;
79
80 layout->glyphs = NULL;
81 layout->num_glyphs = 0;
82
83 layout->clusters = NULL;
84 layout->num_clusters = 0;
85
86 surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 0, 0);
87 cr = cairo_create(surface);
88 cairo_set_font_size(cr, font_size);
89 cairo_select_font_face(cr, font_name, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
90 layout->font = cairo_get_scaled_font(cr);
91 cairo_scaled_font_reference(layout->font);
92
93 cairo_destroy(cr);
94 cairo_surface_destroy(surface);
95
96 return layout;
97}
98
99static void
100text_layout_destroy(struct text_layout *layout)
101{
102 if (layout->glyphs)
103 cairo_glyph_free(layout->glyphs);
104
105 if (layout->clusters)
106 cairo_text_cluster_free(layout->clusters);
107
108 cairo_scaled_font_destroy(layout->font);
109
110 free(layout);
111}
112
113static void
114text_layout_set_text(struct text_layout *layout,
115 const char *text)
116{
117 if (layout->glyphs)
118 cairo_glyph_free(layout->glyphs);
119
120 if (layout->clusters)
121 cairo_text_cluster_free(layout->clusters);
122
123 layout->glyphs = NULL;
124 layout->num_glyphs = 0;
125 layout->clusters = NULL;
126 layout->num_clusters = 0;
127
128 cairo_scaled_font_text_to_glyphs(layout->font, 0, 0, text, -1,
129 &layout->glyphs, &layout->num_glyphs,
130 &layout->clusters, &layout->num_clusters,
131 &layout->cluster_flags);
132}
133
134static void
135text_layout_draw(struct text_layout *layout, cairo_t *cr)
136{
137 cairo_save(cr);
138 cairo_set_scaled_font(cr, layout->font);
139 cairo_show_glyphs(cr, layout->glyphs, layout->num_glyphs);
140 cairo_restore(cr);
141}
142
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200143static void
144text_layout_extents(struct text_layout *layout, cairo_text_extents_t *extents)
145{
146 cairo_scaled_font_glyph_extents(layout->font,
147 layout->glyphs, layout->num_glyphs,
148 extents);
149}
150
151static int
152text_layout_xy_to_index(struct text_layout *layout, double x, double y)
153{
154 cairo_text_extents_t extents;
155 int i;
156
157 cairo_scaled_font_glyph_extents(layout->font,
158 layout->glyphs, layout->num_glyphs,
159 &extents);
160
161 for (i = 1; i < layout->num_glyphs; i++) {
162 if (layout->glyphs[i].x >= x) {
163 return i - 1;
164 }
165 }
166
167 if (x >= layout->glyphs[layout->num_glyphs - 1].x && x < extents.width)
168 return layout->num_glyphs - 1;
169
170 return layout->num_glyphs;
171}
172
173static void
174text_layout_index_to_pos(struct text_layout *layout, uint32_t index, cairo_rectangle_t *pos)
175{
176 cairo_text_extents_t extents;
177
178 if (!pos)
179 return;
180
181 cairo_scaled_font_glyph_extents(layout->font,
182 layout->glyphs, layout->num_glyphs,
183 &extents);
184
185 if ((int)index >= layout->num_glyphs) {
186 pos->x = extents.x_advance;
187 pos->y = layout->num_glyphs ? layout->glyphs[layout->num_glyphs - 1].y : 0;
188 pos->width = 1;
189 pos->height = extents.height;
190 return;
191 }
192
193 pos->x = layout->glyphs[index].x;
194 pos->y = layout->glyphs[index].y;
195 pos->width = (int)index < layout->num_glyphs - 1 ? layout->glyphs[index + 1].x : extents.x_advance - pos->x;
196 pos->height = extents.height;
197}
198
199static void
200text_layout_get_cursor_pos(struct text_layout *layout, int index, cairo_rectangle_t *pos)
201{
202 text_layout_index_to_pos(layout, index, pos);
203 pos->width = 1;
204}
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +0200205
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200206static void text_entry_redraw_handler(struct widget *widget, void *data);
207static void text_entry_button_handler(struct widget *widget,
208 struct input *input, uint32_t time,
209 uint32_t button,
210 enum wl_pointer_button_state state, void *data);
Jan Arne Petersen09e7c962012-09-09 23:08:37 +0200211static void text_entry_insert_at_cursor(struct text_entry *entry, const char *text);
Jan Arne Petersen43f4aa82012-09-09 23:08:43 +0200212static void text_entry_set_preedit(struct text_entry *entry,
213 const char *preedit_text,
214 int preedit_cursor);
Jan Arne Petersene202bae2012-09-09 23:08:44 +0200215static void text_entry_delete_text(struct text_entry *entry,
216 uint32_t index, uint32_t length);
Jan Arne Petersene386dd22012-09-17 15:28:09 +0200217static void text_entry_delete_selected_text(struct text_entry *entry);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200218
219static void
220text_model_commit_string(void *data,
221 struct text_model *text_model,
222 const char *text,
223 uint32_t index)
224{
225 struct text_entry *entry = data;
226
Jan Arne Petersen09e7c962012-09-09 23:08:37 +0200227 if (index > strlen(text)) {
228 fprintf(stderr, "Invalid cursor index %d\n", index);
229 index = strlen(text);
230 }
231
Jan Arne Petersene386dd22012-09-17 15:28:09 +0200232 text_entry_delete_selected_text(entry);
Jan Arne Petersen09e7c962012-09-09 23:08:37 +0200233 text_entry_insert_at_cursor(entry, text);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200234
235 widget_schedule_redraw(entry->widget);
236}
237
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200238static void
239text_model_preedit_string(void *data,
240 struct text_model *text_model,
241 const char *text,
242 uint32_t index)
243{
Jan Arne Petersen43f4aa82012-09-09 23:08:43 +0200244 struct text_entry *entry = data;
245
246 if (index > strlen(text)) {
247 fprintf(stderr, "Invalid cursor index %d\n", index);
248 index = strlen(text);
249 }
250
Jan Arne Petersene386dd22012-09-17 15:28:09 +0200251 text_entry_delete_selected_text(entry);
Jan Arne Petersen43f4aa82012-09-09 23:08:43 +0200252 text_entry_set_preedit(entry, text, index);
253
254 widget_schedule_redraw(entry->widget);
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200255}
256
257static void
Jan Arne Petersene202bae2012-09-09 23:08:44 +0200258text_model_delete_surrounding_text(void *data,
259 struct text_model *text_model,
260 int32_t index,
261 uint32_t length)
262{
263 struct text_entry *entry = data;
264 uint32_t cursor_index = index + entry->cursor;
265
266 if (cursor_index > strlen(entry->text)) {
267 fprintf(stderr, "Invalid cursor index %d\n", index);
268 return;
269 }
270
271 if (cursor_index + length > strlen(entry->text)) {
272 fprintf(stderr, "Invalid length %d\n", length);
273 return;
274 }
275
276 if (length == 0)
277 return;
278
279 text_entry_delete_text(entry, cursor_index, length);
280}
281
282static void
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200283text_model_preedit_styling(void *data,
284 struct text_model *text_model)
285{
286}
287
288static void
289text_model_key(void *data,
Jan Arne Petersence8a4432012-09-09 23:08:45 +0200290 struct text_model *text_model,
291 uint32_t key,
292 uint32_t state)
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200293{
Jan Arne Petersen8aba11d2012-09-17 15:28:07 +0200294 struct text_entry *entry = data;
Jan Arne Petersence8a4432012-09-09 23:08:45 +0200295 const char *state_label;
Jan Arne Petersen8aba11d2012-09-17 15:28:07 +0200296 const char *key_label = "released";
Jan Arne Petersence8a4432012-09-09 23:08:45 +0200297
298 if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
299 state_label = "pressed";
Jan Arne Petersence8a4432012-09-09 23:08:45 +0200300 }
301
302 switch (key) {
303 case XKB_KEY_Tab:
304 key_label = "Tab";
305 break;
306 case XKB_KEY_KP_Enter:
307 key_label = "Enter";
308 break;
Jan Arne Petersen8aba11d2012-09-17 15:28:07 +0200309 case XKB_KEY_Left:
310 if (entry->cursor > 0) {
311 entry->cursor--;
312 entry->anchor = entry->cursor;
313 widget_schedule_redraw(entry->widget);
314 }
315 break;
316 case XKB_KEY_Right:
317 if (entry->cursor < strlen(entry->text)) {
318 entry->cursor++;
319 entry->anchor = entry->cursor;
320 widget_schedule_redraw(entry->widget);
321 }
322 break;
Jan Arne Petersence8a4432012-09-09 23:08:45 +0200323 default:
324 key_label = "Unknown";
325 }
326
327 fprintf(stderr, "%s key was %s.\n", key_label, state_label);
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200328}
329
330static void
331text_model_selection_replacement(void *data,
332 struct text_model *text_model)
333{
334}
335
336static void
337text_model_direction(void *data,
338 struct text_model *text_model)
339{
340}
341
342static void
343text_model_locale(void *data,
344 struct text_model *text_model)
345{
346}
347
Jan Arne Petersende3b6a12012-08-10 16:47:21 +0200348static void
349text_model_activated(void *data,
350 struct text_model *text_model)
351{
352 struct text_entry *entry = data;
353
354 entry->active = 1;
355
356 widget_schedule_redraw(entry->widget);
357}
358
359static void
360text_model_deactivated(void *data,
361 struct text_model *text_model)
362{
363 struct text_entry *entry = data;
364
365 entry->active = 0;
366
367 widget_schedule_redraw(entry->widget);
368}
369
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200370static const struct text_model_listener text_model_listener = {
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200371 text_model_commit_string,
372 text_model_preedit_string,
Jan Arne Petersene202bae2012-09-09 23:08:44 +0200373 text_model_delete_surrounding_text,
Jan Arne Petersen72f60822012-08-10 16:47:19 +0200374 text_model_preedit_styling,
375 text_model_key,
376 text_model_selection_replacement,
377 text_model_direction,
Jan Arne Petersende3b6a12012-08-10 16:47:21 +0200378 text_model_locale,
379 text_model_activated,
380 text_model_deactivated
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200381};
382
383static struct text_entry*
384text_entry_create(struct editor *editor, const char *text)
385{
386 struct text_entry *entry;
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200387
388 entry = malloc(sizeof *entry);
389
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200390 entry->widget = widget_add_widget(editor->widget, entry);
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200391 entry->window = editor->window;
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200392 entry->text = strdup(text);
393 entry->active = 0;
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200394 entry->cursor = strlen(text);
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200395 entry->anchor = entry->cursor;
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200396 entry->preedit_text = NULL;
397 entry->preedit_cursor = 0;
Jan Arne Petersen4c265182012-09-09 23:08:30 +0200398 entry->model = text_model_factory_create_text_model(editor->text_model_factory);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200399 text_model_add_listener(entry->model, &text_model_listener, entry);
400
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +0200401 entry->layout = text_layout_create();
402 text_layout_set_text(entry->layout, entry->text);
403
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200404 widget_set_redraw_handler(entry->widget, text_entry_redraw_handler);
405 widget_set_button_handler(entry->widget, text_entry_button_handler);
406
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200407 return entry;
408}
409
410static void
411text_entry_destroy(struct text_entry *entry)
412{
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200413 widget_destroy(entry->widget);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200414 text_model_destroy(entry->model);
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +0200415 text_layout_destroy(entry->layout);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200416 free(entry->text);
417 free(entry);
418}
419
420static void
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200421redraw_handler(struct widget *widget, void *data)
422{
423 struct editor *editor = data;
424 cairo_surface_t *surface;
425 struct rectangle allocation;
426 cairo_t *cr;
427
428 surface = window_get_surface(editor->window);
429 widget_get_allocation(editor->widget, &allocation);
430
431 cr = cairo_create(surface);
432 cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
433 cairo_clip(cr);
434
435 cairo_translate(cr, allocation.x, allocation.y);
436
437 /* Draw background */
438 cairo_push_group(cr);
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200439 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200440 cairo_set_source_rgba(cr, 1, 1, 1, 1);
441 cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
442 cairo_fill(cr);
443
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200444 cairo_pop_group_to_source(cr);
445 cairo_paint(cr);
446
447 cairo_destroy(cr);
448 cairo_surface_destroy(surface);
449}
450
451static void
452text_entry_allocate(struct text_entry *entry, int32_t x, int32_t y,
453 int32_t width, int32_t height)
454{
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200455 widget_set_allocation(entry->widget, x, y, width, height);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200456}
457
458static void
459resize_handler(struct widget *widget,
460 int32_t width, int32_t height, void *data)
461{
462 struct editor *editor = data;
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200463 struct rectangle allocation;
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200464
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200465 widget_get_allocation(editor->widget, &allocation);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200466
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200467 text_entry_allocate(editor->entry,
468 allocation.x + 20, allocation.y + 20,
469 width - 40, height / 2 - 40);
470 text_entry_allocate(editor->editor,
471 allocation.x + 20, allocation.y + height / 2 + 20,
472 width - 40, height / 2 - 40);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200473}
474
475static void
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200476text_entry_activate(struct text_entry *entry,
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200477 struct wl_seat *seat)
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200478{
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200479 struct wl_surface *surface = window_get_wl_surface(entry->window);
480
481 text_model_activate(entry->model,
482 seat,
483 surface);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200484}
485
486static void
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200487text_entry_deactivate(struct text_entry *entry,
488 struct wl_seat *seat)
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200489{
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200490 text_model_deactivate(entry->model,
491 seat);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200492}
493
494static void
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200495text_entry_update_layout(struct text_entry *entry)
496{
497 char *text;
498
499 assert(((unsigned int)entry->cursor) <= strlen(entry->text));
500
501 if (!entry->preedit_text) {
502 text_layout_set_text(entry->layout, entry->text);
503 return;
504 }
505
506 text = malloc(strlen(entry->text) + strlen(entry->preedit_text) + 1);
507 strncpy(text, entry->text, entry->cursor);
508 strcpy(text + entry->cursor, entry->preedit_text);
509 strcpy(text + entry->cursor + strlen(entry->preedit_text),
510 entry->text + entry->cursor);
511
512 text_layout_set_text(entry->layout, text);
513 free(text);
514
515 widget_schedule_redraw(entry->widget);
Jan Arne Petersencb08f4d2012-09-09 23:08:40 +0200516
517 text_model_set_surrounding_text(entry->model,
518 entry->text,
519 entry->cursor,
520 entry->anchor);
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200521}
522
523static void
Jan Arne Petersen09e7c962012-09-09 23:08:37 +0200524text_entry_insert_at_cursor(struct text_entry *entry, const char *text)
525{
526 char *new_text = malloc(strlen(entry->text) + strlen(text) + 1);
527
528 strncpy(new_text, entry->text, entry->cursor);
529 strcpy(new_text + entry->cursor, text);
530 strcpy(new_text + entry->cursor + strlen(text),
531 entry->text + entry->cursor);
532
533 free(entry->text);
534 entry->text = new_text;
535 entry->cursor += strlen(text);
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200536 entry->anchor += strlen(text);
Jan Arne Petersen09e7c962012-09-09 23:08:37 +0200537
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200538 text_entry_update_layout(entry);
539}
540
541static void
542text_entry_set_preedit(struct text_entry *entry,
543 const char *preedit_text,
544 int preedit_cursor)
545{
546 if (entry->preedit_text) {
547 free(entry->preedit_text);
548 entry->preedit_text = NULL;
549 entry->preedit_cursor = 0;
550 }
551
552 if (!preedit_text)
553 return;
554
555 entry->preedit_text = strdup(preedit_text);
556 entry->preedit_cursor = preedit_cursor;
557
558 text_entry_update_layout(entry);
Jan Arne Petersen09e7c962012-09-09 23:08:37 +0200559}
560
561static void
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200562text_entry_set_cursor_position(struct text_entry *entry,
563 int32_t x, int32_t y)
564{
565 entry->cursor = text_layout_xy_to_index(entry->layout, x, y);
566
Jan Arne Petersenc1e481e2012-09-09 23:08:46 +0200567 text_model_reset(entry->model);
568
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200569 if (entry->cursor >= entry->preedit_cursor) {
570 entry->cursor -= entry->preedit_cursor;
571 }
572
573 text_entry_update_layout(entry);
574
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200575 widget_schedule_redraw(entry->widget);
576}
577
578static void
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200579text_entry_set_anchor_position(struct text_entry *entry,
580 int32_t x, int32_t y)
581{
582 entry->anchor = text_layout_xy_to_index(entry->layout, x, y);
583
584 widget_schedule_redraw(entry->widget);
585}
586
587static void
Jan Arne Petersene202bae2012-09-09 23:08:44 +0200588text_entry_delete_text(struct text_entry *entry,
589 uint32_t index, uint32_t length)
590{
591 if (entry->cursor > index)
592 entry->cursor -= length;
593
594 entry->text[index] = '\0';
595 strcat(entry->text, entry->text + index + length);
596
597 text_entry_update_layout(entry);
598
599 widget_schedule_redraw(entry->widget);
600}
601
602static void
Jan Arne Petersene386dd22012-09-17 15:28:09 +0200603text_entry_delete_selected_text(struct text_entry *entry)
604{
605 uint32_t start_index = entry->anchor < entry->cursor ? entry->anchor : entry->cursor;
606 uint32_t end_index = entry->anchor < entry->cursor ? entry->cursor : entry->anchor;
607
608 if (entry->anchor == entry->cursor)
609 return;
610
611 text_entry_delete_text(entry, start_index, end_index - start_index);
612
613 entry->anchor = entry->cursor;
614}
615
616static void
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200617text_entry_draw_selection(struct text_entry *entry, cairo_t *cr)
618{
619 cairo_text_extents_t extents;
620 uint32_t start_index = entry->anchor < entry->cursor ? entry->anchor : entry->cursor;
621 uint32_t end_index = entry->anchor < entry->cursor ? entry->cursor : entry->anchor;
622 cairo_rectangle_t start;
623 cairo_rectangle_t end;
624
625 if (entry->anchor == entry->cursor)
626 return;
627
628 text_layout_extents(entry->layout, &extents);
629
630 text_layout_index_to_pos(entry->layout, start_index, &start);
631 text_layout_index_to_pos(entry->layout, end_index, &end);
632
633 cairo_save (cr);
634
635 cairo_set_source_rgba(cr, 0.0, 0.0, 1.0, 1.0);
636 cairo_rectangle(cr,
637 start.x, extents.y_bearing + extents.height + 2,
638 end.x - start.x, -extents.height - 4);
639 cairo_fill(cr);
640
641 cairo_rectangle(cr,
642 start.x, extents.y_bearing + extents.height,
643 end.x - start.x, -extents.height);
644 cairo_clip(cr);
645 cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
646 text_layout_draw(entry->layout, cr);
647
648 cairo_restore (cr);
649}
650
651static void
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200652text_entry_draw_cursor(struct text_entry *entry, cairo_t *cr)
653{
654 cairo_text_extents_t extents;
655 cairo_rectangle_t cursor_pos;
656
657 text_layout_extents(entry->layout, &extents);
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200658 text_layout_get_cursor_pos(entry->layout,
659 entry->cursor + entry->preedit_cursor,
660 &cursor_pos);
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200661
662 cairo_set_line_width(cr, 1.0);
663 cairo_move_to(cr, cursor_pos.x, extents.y_bearing + extents.height + 2);
664 cairo_line_to(cr, cursor_pos.x, extents.y_bearing - 2);
665 cairo_stroke(cr);
666}
667
668static void
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200669text_entry_draw_preedit(struct text_entry *entry, cairo_t *cr)
670{
671 cairo_text_extents_t extents;
672 cairo_rectangle_t start;
673 cairo_rectangle_t end;
674
675 if (!entry->preedit_text)
676 return;
677
678 text_layout_extents(entry->layout, &extents);
679
680 text_layout_index_to_pos(entry->layout, entry->cursor, &start);
681 text_layout_index_to_pos(entry->layout,
682 entry->cursor + strlen(entry->preedit_text),
683 &end);
684
685 cairo_save (cr);
686
687 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
688 cairo_rectangle(cr,
689 start.x, 0,
690 end.x - start.x, 1);
691 cairo_fill(cr);
692
693 cairo_restore (cr);
694}
695
696static void
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200697text_entry_redraw_handler(struct widget *widget, void *data)
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200698{
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200699 struct text_entry *entry = data;
700 cairo_surface_t *surface;
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200701 struct rectangle allocation;
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200702 cairo_t *cr;
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200703
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200704 surface = window_get_surface(entry->window);
705 widget_get_allocation(entry->widget, &allocation);
706
707 cr = cairo_create(surface);
708 cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
709 cairo_clip(cr);
710
711 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
712
713 cairo_push_group(cr);
714 cairo_translate(cr, allocation.x, allocation.y);
715
716 cairo_set_source_rgba(cr, 1, 1, 1, 1);
717 cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
718 cairo_fill(cr);
719
720 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
721
722 if (entry->active) {
723 cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
724 cairo_set_line_width (cr, 3);
725 cairo_set_source_rgba(cr, 0, 0, 1, 1.0);
726 cairo_stroke(cr);
727 }
728
729 cairo_set_source_rgba(cr, 0, 0, 0, 1);
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200730
731 cairo_translate(cr, 10, allocation.height / 2);
Jan Arne Petersenb9eb02c2012-09-09 23:08:35 +0200732 text_layout_draw(entry->layout, cr);
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200733
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200734 text_entry_draw_selection(entry, cr);
735
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200736 text_entry_draw_cursor(entry, cr);
737
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200738 text_entry_draw_preedit(entry, cr);
739
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200740 cairo_pop_group_to_source(cr);
741 cairo_paint(cr);
742
743 cairo_destroy(cr);
744 cairo_surface_destroy(surface);
745}
746
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200747static int
748text_entry_motion_handler(struct widget *widget,
749 struct input *input, uint32_t time,
750 float x, float y, void *data)
751{
752 struct text_entry *entry = data;
753 struct rectangle allocation;
754
755 widget_get_allocation(entry->widget, &allocation);
756
757 text_entry_set_cursor_position(entry,
758 x - allocation.x,
759 y - allocation.y);
760
761 return CURSOR_IBEAM;
762}
763
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200764static void
765text_entry_button_handler(struct widget *widget,
766 struct input *input, uint32_t time,
767 uint32_t button,
768 enum wl_pointer_button_state state, void *data)
769{
770 struct text_entry *entry = data;
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200771 struct rectangle allocation;
772 int32_t x, y;
773
774 widget_get_allocation(entry->widget, &allocation);
775 input_get_position(input, &x, &y);
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200776
777 if (button != BTN_LEFT) {
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200778 return;
779 }
780
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200781 text_entry_set_cursor_position(entry,
Jan Arne Petersen7e634a02012-09-09 23:08:36 +0200782 x - allocation.x,
783 y - allocation.y);
784
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200785 if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
786 struct wl_seat *seat = input_get_seat(input);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200787
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200788 text_entry_activate(entry, seat);
Jan Arne Petersen0e5bd452012-09-09 23:08:38 +0200789
790 text_entry_set_anchor_position(entry,
791 x - allocation.x,
792 y - allocation.y);
793
794 widget_set_motion_handler(entry->widget, text_entry_motion_handler);
795 } else {
796 widget_set_motion_handler(entry->widget, NULL);
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200797 }
798}
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200799
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200800static void
801editor_button_handler(struct widget *widget,
802 struct input *input, uint32_t time,
803 uint32_t button,
804 enum wl_pointer_button_state state, void *data)
805{
806 struct editor *editor = data;
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200807
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200808 if (button != BTN_LEFT) {
809 return;
810 }
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200811
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200812 if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
813 struct wl_seat *seat = input_get_seat(input);
814
Jan Arne Petersene829adc2012-08-10 16:47:22 +0200815 text_entry_deactivate(editor->entry, seat);
816 text_entry_deactivate(editor->editor, seat);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200817 }
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200818}
819
820static void
821global_handler(struct wl_display *display, uint32_t id,
822 const char *interface, uint32_t version, void *data)
823{
824 struct editor *editor = data;
825
Jan Arne Petersen51963742012-08-10 16:47:20 +0200826 if (!strcmp(interface, "text_model_factory")) {
827 editor->text_model_factory = wl_display_bind(display, id,
828 &text_model_factory_interface);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200829 }
830}
831
832int
833main(int argc, char *argv[])
834{
835 struct editor editor;
836
837 editor.display = display_create(argc, argv);
838 if (editor.display == NULL) {
839 fprintf(stderr, "failed to create display: %m\n");
840 return -1;
841 }
842 wl_display_add_global_listener(display_get_display(editor.display),
843 global_handler, &editor);
844
845
846 editor.window = window_create(editor.display);
847 editor.widget = frame_create(editor.window, &editor);
848
849 editor.entry = text_entry_create(&editor, "Entry");
850 editor.editor = text_entry_create(&editor, "Editor");
Jan Arne Petersenc1fbcb72012-09-09 23:08:39 +0200851 text_entry_set_preedit(editor.editor, "preedit", strlen("preedit"));
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200852
853 window_set_title(editor.window, "Text Editor");
854
855 widget_set_redraw_handler(editor.widget, redraw_handler);
856 widget_set_resize_handler(editor.widget, resize_handler);
Jan Arne Petersenf80bc062012-09-09 23:08:34 +0200857 widget_set_button_handler(editor.widget, editor_button_handler);
Jan Arne Petersencba9e472012-06-21 21:52:19 +0200858
859 window_schedule_resize(editor.window, 500, 400);
860
861 display_run(editor.display);
862
863 text_entry_destroy(editor.entry);
864 text_entry_destroy(editor.editor);
865
866 return 0;
867}