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         char *text;
  37         int active;
  38         struct rectangle allocation;
  39         struct text_model *model;
  40 };
  41
  42 struct editor {
  43         struct text_model_factory *text_model_factory;
  44         struct display *display;
  45         struct window *window;
  46         struct widget *widget;
  47         struct text_entry *entry;
  48         struct text_entry *editor;
  49 };
  50
  51 static void
  52 text_entry_append(struct text_entry *entry, const char *text)
  53 {
  54         entry->text = realloc(entry->text, strlen(entry->text) + strlen(text) + 1);
  55         strcat(entry->text, text);
  56 }
  57
  58
  59 static void
  60 text_model_commit_string(void *data,
  61                          struct text_model *text_model,
  62                          const char *text,
  63                          uint32_t index)
  64 {
  65         struct text_entry *entry = data;
  66
  67         text_entry_append(entry, text);
  68
  69         widget_schedule_redraw(entry->widget);
  70 }
  71
  72 static void
  73 text_model_preedit_string(void *data,
  74                           struct text_model *text_model,
  75                           const char *text,
  76                           uint32_t index)
  77 {
  78 }
  79
  80 static void
  81 text_model_preedit_styling(void *data,
  82                            struct text_model *text_model)
  83 {
  84 }
  85
  86 static void
  87 text_model_key(void *data,
  88                struct text_model *text_model)
  89 {
  90 }
  91
  92 static void
  93 text_model_selection_replacement(void *data,
  94                                  struct text_model *text_model)
  95 {
  96 }
  97
  98 static void
  99 text_model_direction(void *data,
 100                      struct text_model *text_model)
 101 {
 102 }
 103
 104 static void
 105 text_model_locale(void *data,
 106                   struct text_model *text_model)
 107 {
 108 }
 109
 110 static void
 111 text_model_activated(void *data,
 112                      struct text_model *text_model)
 113 {
 114         struct text_entry *entry = data;
 115
 116         entry->active = 1;
 117
 118         widget_schedule_redraw(entry->widget);
 119 }
 120
 121 static void
 122 text_model_deactivated(void *data,
 123                        struct text_model *text_model)
 124 {
 125         struct text_entry *entry = data;
 126
 127         entry->active = 0;
 128
 129         widget_schedule_redraw(entry->widget);
 130 }
 131
 132 static const struct text_model_listener text_model_listener = {
 133         text_model_commit_string,
 134         text_model_preedit_string,
 135         text_model_preedit_styling,
 136         text_model_key,
 137         text_model_selection_replacement,
 138         text_model_direction,
 139         text_model_locale,
 140         text_model_activated,
 141         text_model_deactivated
 142 };
 143
 144 static struct text_entry*
 145 text_entry_create(struct editor *editor, const char *text)
 146 {
 147         struct text_entry *entry;
 148         struct wl_surface *surface;
 149
 150         entry = malloc(sizeof *entry);
 151
 152         surface = window_get_wl_surface(editor->window);
 153
 154         entry->widget = editor->widget;
 155         entry->text = strdup(text);
 156         entry->active = 0;
 157         entry->model = text_model_factory_create_text_model(editor->text_model_factory, surface);
 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 {
 276         text_model_activate(entry->model);
 277 }
 278
 279 static void
 280 text_entry_deactivate(struct text_entry *entry)
 281 {
 282         text_model_deactivate(entry->model);
 283 }
 284
 285 static void
 286 button_handler(struct widget *widget,
 287                struct input *input, uint32_t time,
 288                uint32_t button,
 289                enum wl_pointer_button_state state, void *data)
 290 {
 291         struct editor *editor = data;
 292         struct rectangle allocation;
 293         int32_t x, y;
 294
 295         if (state != WL_POINTER_BUTTON_STATE_PRESSED || button != BTN_LEFT) {
 296                 return;
 297         }
 298
 299         input_get_position(input, &x, &y);
 300
 301         widget_get_allocation(editor->widget, &allocation);
 302         x -= allocation.x;
 303         y -= allocation.y;
 304
 305         int32_t activate_entry = rectangle_contains(&editor->entry->allocation, x, y);
 306         int32_t activate_editor = rectangle_contains(&editor->editor->allocation, x, y);
 307         assert(!(activate_entry && activate_editor));
 308
 309         if (activate_entry) {
 310                 text_entry_activate(editor->entry);
 311         } else if (activate_editor) {
 312                 text_entry_activate(editor->editor);
 313         } else {
 314                 text_entry_deactivate(editor->entry);
 315                 text_entry_deactivate(editor->editor);
 316         }
 317
 318         widget_schedule_redraw(widget);
 319 }
 320
 321 static void
 322 global_handler(struct wl_display *display, uint32_t id,
 323                const char *interface, uint32_t version, void *data)
 324 {
 325         struct editor *editor = data;
 326
 327         if (!strcmp(interface, "text_model_factory")) {
 328                 editor->text_model_factory = wl_display_bind(display, id,
 329                                                              &text_model_factory_interface);
 330         } else if (!strcmp(interface, "wl_seat")) {
 331                 fprintf(stderr, "wl_seat added\n");
 332         }
 333 }
 334
 335 int
 336 main(int argc, char *argv[])
 337 {
 338         struct editor editor;
 339
 340         editor.display = display_create(argc, argv);
 341         if (editor.display == NULL) {
 342                 fprintf(stderr, "failed to create display: %m\n");
 343                 return -1;
 344         }
 345         wl_display_add_global_listener(display_get_display(editor.display),
 346                                        global_handler, &editor);
 347
 348
 349         editor.window = window_create(editor.display);
 350         editor.widget = frame_create(editor.window, &editor);
 351
 352         editor.entry = text_entry_create(&editor, "Entry");
 353         editor.editor = text_entry_create(&editor, "Editor");
 354
 355         window_set_title(editor.window, "Text Editor");
 356
 357         widget_set_redraw_handler(editor.widget, redraw_handler);
 358         widget_set_resize_handler(editor.widget, resize_handler);
 359         widget_set_button_handler(editor.widget, button_handler);
 360
 361         window_schedule_resize(editor.window, 500, 400);
 362
 363         display_run(editor.display);
 364
 365         text_entry_destroy(editor.entry);
 366         text_entry_destroy(editor.editor);
 367
 368         return 0;
 369 }