clients/editor.c

   1 /*
   2  * Copyright © 2012 Openismus GmbH
   3  * Copyright © 2012 Intel Corporation
   4  *
   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
  24 #include <assert.h>
  25 #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
  35 struct text_entry {
  36         struct widget *widget;
  37         struct window *window;
  38         char *text;
  39         int active;
  40         struct text_model *model;
  41 };
  42
  43 struct editor {
  44         struct text_model_factory *text_model_factory;
  45         struct display *display;
  46         struct window *window;
  47         struct widget *widget;
  48         struct text_entry *entry;
  49         struct text_entry *editor;
  50 };
  51
  52 static void text_entry_redraw_handler(struct widget *widget, void *data);
  53 static void text_entry_button_handler(struct widget *widget,
  54                                       struct input *input, uint32_t time,
  55                                       uint32_t button,
  56                                       enum wl_pointer_button_state state, void *data);
  57
  58 static void
  59 text_entry_append(struct text_entry *entry, const char *text)
  60 {
  61         entry->text = realloc(entry->text, strlen(entry->text) + strlen(text) + 1);
  62         strcat(entry->text, text);
  63 }
  64
  65
  66 static void
  67 text_model_commit_string(void *data,
  68                          struct text_model *text_model,
  69                          const char *text,
  70                          uint32_t index)
  71 {
  72         struct text_entry *entry = data;
  73
  74         text_entry_append(entry, text);
  75
  76         widget_schedule_redraw(entry->widget);
  77 }
  78
  79 static void
  80 text_model_preedit_string(void *data,
  81                           struct text_model *text_model,
  82                           const char *text,
  83                           uint32_t index)
  84 {
  85 }
  86
  87 static void
  88 text_model_preedit_styling(void *data,
  89                            struct text_model *text_model)
  90 {
  91 }
  92
  93 static void
  94 text_model_key(void *data,
  95                struct text_model *text_model)
  96 {
  97 }
  98
  99 static void
 100 text_model_selection_replacement(void *data,
 101                                  struct text_model *text_model)
 102 {
 103 }
 104
 105 static void
 106 text_model_direction(void *data,
 107                      struct text_model *text_model)
 108 {
 109 }
 110
 111 static void
 112 text_model_locale(void *data,
 113                   struct text_model *text_model)
 114 {
 115 }
 116
 117 static void
 118 text_model_activated(void *data,
 119                      struct text_model *text_model)
 120 {
 121         struct text_entry *entry = data;
 122
 123         entry->active = 1;
 124
 125         widget_schedule_redraw(entry->widget);
 126 }
 127
 128 static void
 129 text_model_deactivated(void *data,
 130                        struct text_model *text_model)
 131 {
 132         struct text_entry *entry = data;
 133
 134         entry->active = 0;
 135
 136         widget_schedule_redraw(entry->widget);
 137 }
 138
 139 static const struct text_model_listener text_model_listener = {
 140         text_model_commit_string,
 141         text_model_preedit_string,
 142         text_model_preedit_styling,
 143         text_model_key,
 144         text_model_selection_replacement,
 145         text_model_direction,
 146         text_model_locale,
 147         text_model_activated,
 148         text_model_deactivated
 149 };
 150
 151 static struct text_entry*
 152 text_entry_create(struct editor *editor, const char *text)
 153 {
 154         struct text_entry *entry;
 155
 156         entry = malloc(sizeof *entry);
 157
 158         entry->widget = widget_add_widget(editor->widget, entry);
 159         entry->window = editor->window;
 160         entry->text = strdup(text);
 161         entry->active = 0;
 162         entry->model = text_model_factory_create_text_model(editor->text_model_factory);
 163         text_model_add_listener(entry->model, &text_model_listener, entry);
 164
 165         widget_set_redraw_handler(entry->widget, text_entry_redraw_handler);
 166         widget_set_button_handler(entry->widget, text_entry_button_handler);
 167
 168         return entry;
 169 }
 170
 171 static void
 172 text_entry_destroy(struct text_entry *entry)
 173 {
 174         widget_destroy(entry->widget);
 175         text_model_destroy(entry->model);
 176         free(entry->text);
 177         free(entry);
 178 }
 179
 180 static void
 181 redraw_handler(struct widget *widget, void *data)
 182 {
 183         struct editor *editor = data;
 184         cairo_surface_t *surface;
 185         struct rectangle allocation;
 186         cairo_t *cr;
 187
 188         surface = window_get_surface(editor->window);
 189         widget_get_allocation(editor->widget, &allocation);
 190
 191         cr = cairo_create(surface);
 192         cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
 193         cairo_clip(cr);
 194
 195         cairo_translate(cr, allocation.x, allocation.y);
 196
 197         /* Draw background */
 198         cairo_push_group(cr);
 199         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 200         cairo_set_source_rgba(cr, 1, 1, 1, 1);
 201         cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
 202         cairo_fill(cr);
 203
 204         cairo_pop_group_to_source(cr);
 205         cairo_paint(cr);
 206
 207         cairo_destroy(cr);
 208         cairo_surface_destroy(surface);
 209 }
 210
 211 static void
 212 text_entry_allocate(struct text_entry *entry, int32_t x, int32_t y,
 213                     int32_t width, int32_t height)
 214 {
 215         widget_set_allocation(entry->widget, x, y, width, height);
 216 }
 217
 218 static void
 219 resize_handler(struct widget *widget,
 220                int32_t width, int32_t height, void *data)
 221 {
 222         struct editor *editor = data;
 223         struct rectangle allocation;
 224
 225         widget_get_allocation(editor->widget, &allocation);
 226
 227         text_entry_allocate(editor->entry,
 228                             allocation.x + 20, allocation.y + 20,
 229                             width - 40, height / 2 - 40);
 230         text_entry_allocate(editor->editor,
 231                             allocation.x + 20, allocation.y + height / 2 + 20,
 232                             width - 40, height / 2 - 40);
 233 }
 234
 235 static void
 236 text_entry_activate(struct text_entry *entry,
 237                     struct wl_seat *seat)
 238 {
 239         struct wl_surface *surface = window_get_wl_surface(entry->window);
 240
 241         text_model_activate(entry->model,
 242                             seat,
 243                             surface);
 244 }
 245
 246 static void
 247 text_entry_deactivate(struct text_entry *entry,
 248                       struct wl_seat *seat)
 249 {
 250         text_model_deactivate(entry->model,
 251                               seat);
 252 }
 253
 254 static void
 255 text_entry_redraw_handler(struct widget *widget, void *data)
 256 {
 257         struct text_entry *entry = data;
 258         cairo_surface_t *surface;
 259         struct rectangle allocation;
 260         cairo_t *cr;
 261
 262         surface = window_get_surface(entry->window);
 263         widget_get_allocation(entry->widget, &allocation);
 264
 265         cr = cairo_create(surface);
 266         cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
 267         cairo_clip(cr);
 268
 269         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 270
 271         cairo_push_group(cr);
 272         cairo_translate(cr, allocation.x, allocation.y);
 273
 274         cairo_set_source_rgba(cr, 1, 1, 1, 1);
 275         cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
 276         cairo_fill(cr);
 277
 278         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 279
 280         if (entry->active) {
 281                 cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
 282                 cairo_set_line_width (cr, 3);
 283                 cairo_set_source_rgba(cr, 0, 0, 1, 1.0);
 284                 cairo_stroke(cr);
 285         }
 286
 287         cairo_set_source_rgba(cr, 0, 0, 0, 1);
 288         cairo_select_font_face(cr, "sans",
 289                                CAIRO_FONT_SLANT_NORMAL,
 290                                CAIRO_FONT_WEIGHT_BOLD);
 291         cairo_set_font_size(cr, 14);
 292
 293         cairo_translate(cr, 10, allocation.height / 2);
 294         cairo_show_text(cr, entry->text);
 295         cairo_pop_group_to_source(cr);
 296         cairo_paint(cr);
 297
 298         cairo_destroy(cr);
 299         cairo_surface_destroy(surface);
 300 }
 301
 302 static void
 303 text_entry_button_handler(struct widget *widget,
 304                           struct input *input, uint32_t time,
 305                           uint32_t button,
 306                           enum wl_pointer_button_state state, void *data)
 307 {
 308         struct text_entry *entry = data;
 309
 310         if (button != BTN_LEFT) {
 311                 return;
 312         }
 313
 314         if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
 315                 struct wl_seat *seat = input_get_seat(input);
 316
 317                 text_entry_activate(entry, seat);
 318         }
 319 }
 320
 321 static void
 322 editor_button_handler(struct widget *widget,
 323                       struct input *input, uint32_t time,
 324                       uint32_t button,
 325                       enum wl_pointer_button_state state, void *data)
 326 {
 327         struct editor *editor = data;
 328
 329         if (button != BTN_LEFT) {
 330                 return;
 331         }
 332
 333         if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
 334                 struct wl_seat *seat = input_get_seat(input);
 335
 336                 text_entry_deactivate(editor->entry, seat);
 337                 text_entry_deactivate(editor->editor, seat);
 338         }
 339 }
 340
 341 static void
 342 global_handler(struct wl_display *display, uint32_t id,
 343                const char *interface, uint32_t version, void *data)
 344 {
 345         struct editor *editor = data;
 346
 347         if (!strcmp(interface, "text_model_factory")) {
 348                 editor->text_model_factory = wl_display_bind(display, id,
 349                                                              &text_model_factory_interface);
 350         }
 351 }
 352
 353 int
 354 main(int argc, char *argv[])
 355 {
 356         struct editor editor;
 357
 358         editor.display = display_create(argc, argv);
 359         if (editor.display == NULL) {
 360                 fprintf(stderr, "failed to create display: %m\n");
 361                 return -1;
 362         }
 363         wl_display_add_global_listener(display_get_display(editor.display),
 364                                        global_handler, &editor);
 365
 366
 367         editor.window = window_create(editor.display);
 368         editor.widget = frame_create(editor.window, &editor);
 369
 370         editor.entry = text_entry_create(&editor, "Entry");
 371         editor.editor = text_entry_create(&editor, "Editor");
 372
 373         window_set_title(editor.window, "Text Editor");
 374
 375         widget_set_redraw_handler(editor.widget, redraw_handler);
 376         widget_set_resize_handler(editor.widget, resize_handler);
 377         widget_set_button_handler(editor.widget, editor_button_handler);
 378
 379         window_schedule_resize(editor.window, 500, 400);
 380
 381         display_run(editor.display);
 382
 383         text_entry_destroy(editor.entry);
 384         text_entry_destroy(editor.editor);
 385
 386         return 0;
 387 }