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 rectangle allocation;
  41         struct text_model *model;
  42 };
  43
  44 struct editor {
  45         struct text_model_factory *text_model_factory;
  46         struct display *display;
  47         struct window *window;
  48         struct widget *widget;
  49         struct text_entry *entry;
  50         struct text_entry *editor;
  51 };
  52
  53 static void
  54 text_entry_append(struct text_entry *entry, const char *text)
  55 {
  56         entry->text = realloc(entry->text, strlen(entry->text) + strlen(text) + 1);
  57         strcat(entry->text, text);
  58 }
  59
  60
  61 static void
  62 text_model_commit_string(void *data,
  63                          struct text_model *text_model,
  64                          const char *text,
  65                          uint32_t index)
  66 {
  67         struct text_entry *entry = data;
  68
  69         text_entry_append(entry, text);
  70
  71         widget_schedule_redraw(entry->widget);
  72 }
  73
  74 static void
  75 text_model_preedit_string(void *data,
  76                           struct text_model *text_model,
  77                           const char *text,
  78                           uint32_t index)
  79 {
  80 }
  81
  82 static void
  83 text_model_preedit_styling(void *data,
  84                            struct text_model *text_model)
  85 {
  86 }
  87
  88 static void
  89 text_model_key(void *data,
  90                struct text_model *text_model)
  91 {
  92 }
  93
  94 static void
  95 text_model_selection_replacement(void *data,
  96                                  struct text_model *text_model)
  97 {
  98 }
  99
 100 static void
 101 text_model_direction(void *data,
 102                      struct text_model *text_model)
 103 {
 104 }
 105
 106 static void
 107 text_model_locale(void *data,
 108                   struct text_model *text_model)
 109 {
 110 }
 111
 112 static void
 113 text_model_activated(void *data,
 114                      struct text_model *text_model)
 115 {
 116         struct text_entry *entry = data;
 117
 118         entry->active = 1;
 119
 120         widget_schedule_redraw(entry->widget);
 121 }
 122
 123 static void
 124 text_model_deactivated(void *data,
 125                        struct text_model *text_model)
 126 {
 127         struct text_entry *entry = data;
 128
 129         entry->active = 0;
 130
 131         widget_schedule_redraw(entry->widget);
 132 }
 133
 134 static const struct text_model_listener text_model_listener = {
 135         text_model_commit_string,
 136         text_model_preedit_string,
 137         text_model_preedit_styling,
 138         text_model_key,
 139         text_model_selection_replacement,
 140         text_model_direction,
 141         text_model_locale,
 142         text_model_activated,
 143         text_model_deactivated
 144 };
 145
 146 static struct text_entry*
 147 text_entry_create(struct editor *editor, const char *text)
 148 {
 149         struct text_entry *entry;
 150
 151         entry = malloc(sizeof *entry);
 152
 153         entry->widget = editor->widget;
 154         entry->window = editor->window;
 155         entry->text = strdup(text);
 156         entry->active = 0;
 157         entry->model = text_model_factory_create_text_model(editor->text_model_factory);
 158         text_model_add_listener(entry->model, &text_model_listener, entry);
 159
 160         return entry;
 161 }
 162
 163 static void
 164 text_entry_destroy(struct text_entry *entry)
 165 {
 166         text_model_destroy(entry->model);
 167         free(entry->text);
 168         free(entry);
 169 }
 170
 171 static void
 172 text_entry_draw(struct text_entry *entry, cairo_t *cr)
 173 {
 174         cairo_save(cr);
 175         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 176
 177         cairo_rectangle(cr, entry->allocation.x, entry->allocation.y, entry->allocation.width, entry->allocation.height);
 178         cairo_clip(cr);
 179
 180         cairo_translate(cr, entry->allocation.x, entry->allocation.y);
 181         cairo_rectangle(cr, 0, 0, entry->allocation.width, entry->allocation.height);
 182         cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
 183         cairo_fill(cr);
 184         if (entry->active) {
 185                 cairo_rectangle(cr, 0, 0, entry->allocation.width, entry->allocation.height);
 186                 cairo_set_source_rgba(cr, 0, 0, 1, 0.5);
 187                 cairo_stroke(cr);
 188         }
 189
 190         cairo_set_source_rgb(cr, 0, 0, 0);
 191         cairo_select_font_face(cr, "sans",
 192                                CAIRO_FONT_SLANT_NORMAL,
 193                                CAIRO_FONT_WEIGHT_BOLD);
 194         cairo_set_font_size(cr, 14);
 195
 196         cairo_translate(cr, 10, entry->allocation.height / 2);
 197         cairo_show_text(cr, entry->text);
 198
 199         cairo_restore(cr);
 200 }
 201
 202 static void
 203 redraw_handler(struct widget *widget, void *data)
 204 {
 205         struct editor *editor = data;
 206         cairo_surface_t *surface;
 207         struct rectangle allocation;
 208         cairo_t *cr;
 209
 210         surface = window_get_surface(editor->window);
 211         widget_get_allocation(editor->widget, &allocation);
 212
 213         cr = cairo_create(surface);
 214         cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
 215         cairo_clip(cr);
 216
 217         cairo_translate(cr, allocation.x, allocation.y);
 218
 219         /* Draw background */
 220         cairo_push_group(cr);
 221         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 222         cairo_set_source_rgba(cr, 1, 1, 1, 1);
 223         cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
 224         cairo_fill(cr);
 225
 226         /* Entry */
 227         text_entry_draw(editor->entry, cr);
 228
 229         /* Editor */
 230         text_entry_draw(editor->editor, cr);
 231
 232         cairo_pop_group_to_source(cr);
 233         cairo_paint(cr);
 234
 235         cairo_destroy(cr);
 236         cairo_surface_destroy(surface);
 237 }
 238
 239 static void
 240 text_entry_allocate(struct text_entry *entry, int32_t x, int32_t y,
 241                     int32_t width, int32_t height)
 242 {
 243         entry->allocation.x = x;
 244         entry->allocation.y = y;
 245         entry->allocation.width = width;
 246         entry->allocation.height = height;
 247 }
 248
 249 static void
 250 resize_handler(struct widget *widget,
 251                int32_t width, int32_t height, void *data)
 252 {
 253         struct editor *editor = data;
 254
 255         text_entry_allocate(editor->entry, 20, 20, width - 40, height / 2 - 40);
 256         text_entry_allocate(editor->editor, 20, height / 2 + 20, width - 40, height / 2 - 40);
 257 }
 258
 259 static int32_t
 260 rectangle_contains(struct rectangle *rectangle, int32_t x, int32_t y)
 261 {
 262         if (x < rectangle->x || x > rectangle->x + rectangle->width) {
 263                 return 0;
 264         }
 265
 266         if (y < rectangle->y || y > rectangle->y + rectangle->height) {
 267                 return 0;
 268         }
 269
 270         return 1;
 271 }
 272
 273 static void
 274 text_entry_activate(struct text_entry *entry,
 275                     struct wl_seat *seat)
 276 {
 277         struct wl_surface *surface = window_get_wl_surface(entry->window);
 278
 279         text_model_activate(entry->model,
 280                             seat,
 281                             surface);
 282 }
 283
 284 static void
 285 text_entry_deactivate(struct text_entry *entry,
 286                       struct wl_seat *seat)
 287 {
 288         text_model_deactivate(entry->model,
 289                               seat);
 290 }
 291
 292 static void
 293 button_handler(struct widget *widget,
 294                struct input *input, uint32_t time,
 295                uint32_t button,
 296                enum wl_pointer_button_state state, void *data)
 297 {
 298         struct editor *editor = data;
 299         struct rectangle allocation;
 300         int32_t x, y;
 301         struct wl_seat *seat;
 302
 303         if (state != WL_POINTER_BUTTON_STATE_PRESSED || button != BTN_LEFT) {
 304                 return;
 305         }
 306
 307         input_get_position(input, &x, &y);
 308
 309         widget_get_allocation(editor->widget, &allocation);
 310         x -= allocation.x;
 311         y -= allocation.y;
 312
 313         int32_t activate_entry = rectangle_contains(&editor->entry->allocation, x, y);
 314         int32_t activate_editor = rectangle_contains(&editor->editor->allocation, x, y);
 315         assert(!(activate_entry && activate_editor));
 316
 317         seat = input_get_seat(input);
 318
 319         if (activate_entry) {
 320                 text_entry_activate(editor->entry, seat);
 321         } else if (activate_editor) {
 322                 text_entry_activate(editor->editor, seat);
 323         } else {
 324                 text_entry_deactivate(editor->entry, seat);
 325                 text_entry_deactivate(editor->editor, seat);
 326         }
 327
 328         widget_schedule_redraw(widget);
 329 }
 330
 331 static void
 332 global_handler(struct wl_display *display, uint32_t id,
 333                const char *interface, uint32_t version, void *data)
 334 {
 335         struct editor *editor = data;
 336
 337         if (!strcmp(interface, "text_model_factory")) {
 338                 editor->text_model_factory = wl_display_bind(display, id,
 339                                                              &text_model_factory_interface);
 340         } else if (!strcmp(interface, "wl_seat")) {
 341                 fprintf(stderr, "wl_seat added\n");
 342         }
 343 }
 344
 345 int
 346 main(int argc, char *argv[])
 347 {
 348         struct editor editor;
 349
 350         editor.display = display_create(argc, argv);
 351         if (editor.display == NULL) {
 352                 fprintf(stderr, "failed to create display: %m\n");
 353                 return -1;
 354         }
 355         wl_display_add_global_listener(display_get_display(editor.display),
 356                                        global_handler, &editor);
 357
 358
 359         editor.window = window_create(editor.display);
 360         editor.widget = frame_create(editor.window, &editor);
 361
 362         editor.entry = text_entry_create(&editor, "Entry");
 363         editor.editor = text_entry_create(&editor, "Editor");
 364
 365         window_set_title(editor.window, "Text Editor");
 366
 367         widget_set_redraw_handler(editor.widget, redraw_handler);
 368         widget_set_resize_handler(editor.widget, resize_handler);
 369         widget_set_button_handler(editor.widget, button_handler);
 370
 371         window_schedule_resize(editor.window, 500, 400);
 372
 373         display_run(editor.display);
 374
 375         text_entry_destroy(editor.entry);
 376         text_entry_destroy(editor.editor);
 377
 378         return 0;
 379 }