clients/editor.c

   1 /*
   2  * Copyright © 2012 Openismus GmbH
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #include <assert.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include <linux/input.h>
  29 #include <cairo.h>
  30
  31 #include "window.h"
  32 #include "text-client-protocol.h"
  33
  34 struct text_entry {
  35         struct widget *widget;
  36         struct window *window;
  37         char *text;
  38         int active;
  39         struct rectangle allocation;
  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
  53 text_entry_append(struct text_entry *entry, const char *text)
  54 {
  55         entry->text = realloc(entry->text, strlen(entry->text) + strlen(text) + 1);
  56         strcat(entry->text, text);
  57 }
  58
  59
  60 static void
  61 text_model_commit_string(void *data,
  62                          struct text_model *text_model,
  63                          const char *text,
  64                          uint32_t index)
  65 {
  66         struct text_entry *entry = data;
  67
  68         text_entry_append(entry, text);
  69
  70         widget_schedule_redraw(entry->widget);
  71 }
  72
  73 static void
  74 text_model_preedit_string(void *data,
  75                           struct text_model *text_model,
  76                           const char *text,
  77                           uint32_t index)
  78 {
  79 }
  80
  81 static void
  82 text_model_preedit_styling(void *data,
  83                            struct text_model *text_model)
  84 {
  85 }
  86
  87 static void
  88 text_model_key(void *data,
  89                struct text_model *text_model)
  90 {
  91 }
  92
  93 static void
  94 text_model_selection_replacement(void *data,
  95                                  struct text_model *text_model)
  96 {
  97 }
  98
  99 static void
 100 text_model_direction(void *data,
 101                      struct text_model *text_model)
 102 {
 103 }
 104
 105 static void
 106 text_model_locale(void *data,
 107                   struct text_model *text_model)
 108 {
 109 }
 110
 111 static void
 112 text_model_activated(void *data,
 113                      struct text_model *text_model)
 114 {
 115         struct text_entry *entry = data;
 116
 117         entry->active = 1;
 118
 119         widget_schedule_redraw(entry->widget);
 120 }
 121
 122 static void
 123 text_model_deactivated(void *data,
 124                        struct text_model *text_model)
 125 {
 126         struct text_entry *entry = data;
 127
 128         entry->active = 0;
 129
 130         widget_schedule_redraw(entry->widget);
 131 }
 132
 133 static const struct text_model_listener text_model_listener = {
 134         text_model_commit_string,
 135         text_model_preedit_string,
 136         text_model_preedit_styling,
 137         text_model_key,
 138         text_model_selection_replacement,
 139         text_model_direction,
 140         text_model_locale,
 141         text_model_activated,
 142         text_model_deactivated
 143 };
 144
 145 static struct text_entry*
 146 text_entry_create(struct editor *editor, const char *text)
 147 {
 148         struct text_entry *entry;
 149         struct wl_surface *surface;
 150
 151         entry = malloc(sizeof *entry);
 152
 153         surface = window_get_wl_surface(editor->window);
 154
 155         entry->widget = editor->widget;
 156         entry->window = editor->window;
 157         entry->text = strdup(text);
 158         entry->active = 0;
 159         entry->model = text_model_factory_create_text_model(editor->text_model_factory, surface);
 160         text_model_add_listener(entry->model, &text_model_listener, entry);
 161
 162         return entry;
 163 }
 164
 165 static void
 166 text_entry_destroy(struct text_entry *entry)
 167 {
 168         text_model_destroy(entry->model);
 169         free(entry->text);
 170         free(entry);
 171 }
 172
 173 static void
 174 text_entry_draw(struct text_entry *entry, cairo_t *cr)
 175 {
 176         cairo_save(cr);
 177         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 178
 179         cairo_rectangle(cr, entry->allocation.x, entry->allocation.y, entry->allocation.width, entry->allocation.height);
 180         cairo_clip(cr);
 181
 182         cairo_translate(cr, entry->allocation.x, entry->allocation.y);
 183         cairo_rectangle(cr, 0, 0, entry->allocation.width, entry->allocation.height);
 184         cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
 185         cairo_fill(cr);
 186         if (entry->active) {
 187                 cairo_rectangle(cr, 0, 0, entry->allocation.width, entry->allocation.height);
 188                 cairo_set_source_rgba(cr, 0, 0, 1, 0.5);
 189                 cairo_stroke(cr);
 190         }
 191
 192         cairo_set_source_rgb(cr, 0, 0, 0);
 193         cairo_select_font_face(cr, "sans",
 194                                CAIRO_FONT_SLANT_NORMAL,
 195                                CAIRO_FONT_WEIGHT_BOLD);
 196         cairo_set_font_size(cr, 14);
 197
 198         cairo_translate(cr, 10, entry->allocation.height / 2);
 199         cairo_show_text(cr, entry->text);
 200
 201         cairo_restore(cr);
 202 }
 203
 204 static void
 205 redraw_handler(struct widget *widget, void *data)
 206 {
 207         struct editor *editor = data;
 208         cairo_surface_t *surface;
 209         struct rectangle allocation;
 210         cairo_t *cr;
 211
 212         surface = window_get_surface(editor->window);
 213         widget_get_allocation(editor->widget, &allocation);
 214
 215         cr = cairo_create(surface);
 216         cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
 217         cairo_clip(cr);
 218
 219         cairo_translate(cr, allocation.x, allocation.y);
 220
 221         /* Draw background */
 222         cairo_push_group(cr);
 223         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 224         cairo_set_source_rgba(cr, 1, 1, 1, 1);
 225         cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
 226         cairo_fill(cr);
 227
 228         /* Entry */
 229         text_entry_draw(editor->entry, cr);
 230
 231         /* Editor */
 232         text_entry_draw(editor->editor, cr);
 233
 234         cairo_pop_group_to_source(cr);
 235         cairo_paint(cr);
 236
 237         cairo_destroy(cr);
 238         cairo_surface_destroy(surface);
 239 }
 240
 241 static void
 242 text_entry_allocate(struct text_entry *entry, int32_t x, int32_t y,
 243                     int32_t width, int32_t height)
 244 {
 245         entry->allocation.x = x;
 246         entry->allocation.y = y;
 247         entry->allocation.width = width;
 248         entry->allocation.height = height;
 249 }
 250
 251 static void
 252 resize_handler(struct widget *widget,
 253                int32_t width, int32_t height, void *data)
 254 {
 255         struct editor *editor = data;
 256
 257         text_entry_allocate(editor->entry, 20, 20, width - 40, height / 2 - 40);
 258         text_entry_allocate(editor->editor, 20, height / 2 + 20, width - 40, height / 2 - 40);
 259 }
 260
 261 static int32_t
 262 rectangle_contains(struct rectangle *rectangle, int32_t x, int32_t y)
 263 {
 264         if (x < rectangle->x || x > rectangle->x + rectangle->width) {
 265                 return 0;
 266         }
 267
 268         if (y < rectangle->y || y > rectangle->y + rectangle->height) {
 269                 return 0;
 270         }
 271
 272         return 1;
 273 }
 274
 275 static void
 276 text_entry_activate(struct text_entry *entry,
 277                     struct wl_seat *seat)
 278 {
 279         struct wl_surface *surface = window_get_wl_surface(entry->window);
 280
 281         text_model_activate(entry->model,
 282                             seat,
 283                             surface);
 284 }
 285
 286 static void
 287 text_entry_deactivate(struct text_entry *entry,
 288                       struct wl_seat *seat)
 289 {
 290         text_model_deactivate(entry->model,
 291                               seat);
 292 }
 293
 294 static void
 295 button_handler(struct widget *widget,
 296                struct input *input, uint32_t time,
 297                uint32_t button,
 298                enum wl_pointer_button_state state, void *data)
 299 {
 300         struct editor *editor = data;
 301         struct rectangle allocation;
 302         int32_t x, y;
 303         struct wl_seat *seat;
 304
 305         if (state != WL_POINTER_BUTTON_STATE_PRESSED || button != BTN_LEFT) {
 306                 return;
 307         }
 308
 309         input_get_position(input, &x, &y);
 310
 311         widget_get_allocation(editor->widget, &allocation);
 312         x -= allocation.x;
 313         y -= allocation.y;
 314
 315         int32_t activate_entry = rectangle_contains(&editor->entry->allocation, x, y);
 316         int32_t activate_editor = rectangle_contains(&editor->editor->allocation, x, y);
 317         assert(!(activate_entry && activate_editor));
 318
 319         seat = input_get_seat(input);
 320
 321         if (activate_entry) {
 322                 text_entry_activate(editor->entry, seat);
 323         } else if (activate_editor) {
 324                 text_entry_activate(editor->editor, seat);
 325         } else {
 326                 text_entry_deactivate(editor->entry, seat);
 327                 text_entry_deactivate(editor->editor, seat);
 328         }
 329
 330         widget_schedule_redraw(widget);
 331 }
 332
 333 static void
 334 global_handler(struct wl_display *display, uint32_t id,
 335                const char *interface, uint32_t version, void *data)
 336 {
 337         struct editor *editor = data;
 338
 339         if (!strcmp(interface, "text_model_factory")) {
 340                 editor->text_model_factory = wl_display_bind(display, id,
 341                                                              &text_model_factory_interface);
 342         } else if (!strcmp(interface, "wl_seat")) {
 343                 fprintf(stderr, "wl_seat added\n");
 344         }
 345 }
 346
 347 int
 348 main(int argc, char *argv[])
 349 {
 350         struct editor editor;
 351
 352         editor.display = display_create(argc, argv);
 353         if (editor.display == NULL) {
 354                 fprintf(stderr, "failed to create display: %m\n");
 355                 return -1;
 356         }
 357         wl_display_add_global_listener(display_get_display(editor.display),
 358                                        global_handler, &editor);
 359
 360
 361         editor.window = window_create(editor.display);
 362         editor.widget = frame_create(editor.window, &editor);
 363
 364         editor.entry = text_entry_create(&editor, "Entry");
 365         editor.editor = text_entry_create(&editor, "Editor");
 366
 367         window_set_title(editor.window, "Text Editor");
 368
 369         widget_set_redraw_handler(editor.widget, redraw_handler);
 370         widget_set_resize_handler(editor.widget, resize_handler);
 371         widget_set_button_handler(editor.widget, button_handler);
 372
 373         window_schedule_resize(editor.window, 500, 400);
 374
 375         display_run(editor.display);
 376
 377         text_entry_destroy(editor.entry);
 378         text_entry_destroy(editor.editor);
 379
 380         return 0;
 381 }