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