src/text-backend.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 <stdlib.h>
  25
  26 #include "compositor.h"
  27 #include "text-server-protocol.h"
  28 #include "input-method-server-protocol.h"
  29
  30 struct input_method;
  31 struct input_method_context;
  32
  33 struct text_model {
  34         struct wl_resource resource;
  35
  36         struct weston_compositor *ec;
  37
  38         struct wl_list input_methods;
  39
  40         struct wl_surface *surface;
  41 };
  42
  43 struct text_model_factory {
  44         struct wl_global *text_model_factory_global;
  45         struct wl_listener destroy_listener;
  46
  47         struct weston_compositor *ec;
  48 };
  49
  50 struct input_method {
  51         struct wl_resource *input_method_binding;
  52         struct wl_global *input_method_global;
  53         struct wl_listener destroy_listener;
  54
  55         struct weston_seat *seat;
  56         struct text_model *model;
  57
  58         struct wl_list link;
  59
  60         struct wl_listener keyboard_focus_listener;
  61
  62         int focus_listener_initialized;
  63
  64         struct input_method_context *context;
  65 };
  66
  67 struct input_method_context {
  68         struct wl_resource resource;
  69
  70         struct text_model *model;
  71
  72         struct wl_list link;
  73 };
  74
  75 static void input_method_context_create(struct text_model *model,
  76                                         struct input_method *input_method);
  77
  78 static void input_method_init_seat(struct weston_seat *seat);
  79
  80 static void
  81 deactivate_text_model(struct text_model *text_model,
  82                       struct input_method *input_method)
  83 {
  84         struct weston_compositor *ec = text_model->ec;
  85
  86         if (input_method->model == text_model) {
  87                 if (input_method->input_method_binding)
  88                         input_method_send_deactivate(input_method->input_method_binding, &input_method->context->resource);
  89                 wl_list_remove(&input_method->link);
  90                 input_method->model = NULL;
  91                 input_method->context = NULL;
  92                 wl_signal_emit(&ec->hide_input_panel_signal, ec);
  93                 text_model_send_deactivated(&text_model->resource);
  94         }
  95 }
  96
  97 static void
  98 destroy_text_model(struct wl_resource *resource)
  99 {
 100         struct text_model *text_model =
 101                 container_of(resource, struct text_model, resource);
 102         struct input_method *input_method, *next;
 103
 104         wl_list_for_each_safe(input_method, next, &text_model->input_methods, link)
 105                 deactivate_text_model(text_model, input_method);
 106
 107         free(text_model);
 108 }
 109
 110 static void
 111 text_model_set_surrounding_text(struct wl_client *client,
 112                                 struct wl_resource *resource,
 113                                 const char *text,
 114                                 uint32_t cursor,
 115                                 uint32_t anchor)
 116 {
 117         struct text_model *text_model = resource->data;
 118         struct input_method *input_method, *next;
 119
 120         wl_list_for_each_safe(input_method, next, &text_model->input_methods, link) {
 121                 if (!input_method->context)
 122                         continue;
 123                 input_method_context_send_surrounding_text(&input_method->context->resource,
 124                                                            text,
 125                                                            cursor,
 126                                                            anchor);
 127         }
 128 }
 129
 130 static void
 131 text_model_activate(struct wl_client *client,
 132                     struct wl_resource *resource,
 133                     struct wl_resource *seat,
 134                     struct wl_resource *surface)
 135 {
 136         struct text_model *text_model = resource->data;
 137         struct weston_seat *weston_seat = seat->data;
 138         struct input_method *input_method = weston_seat->input_method;
 139         struct text_model *old = weston_seat->input_method->model;
 140         struct weston_compositor *ec = text_model->ec;
 141
 142         if (old == text_model)
 143                 return;
 144
 145         if (old) {
 146                 deactivate_text_model(old,
 147                                       weston_seat->input_method);
 148         }
 149
 150         input_method->model = text_model;
 151         wl_list_insert(&text_model->input_methods, &input_method->link);
 152         input_method_init_seat(weston_seat);
 153
 154         text_model->surface = surface->data;
 155
 156         input_method_context_create(text_model, input_method);
 157
 158         wl_signal_emit(&ec->show_input_panel_signal, ec);
 159
 160         text_model_send_activated(&text_model->resource);
 161 }
 162
 163 static void
 164 text_model_deactivate(struct wl_client *client,
 165                       struct wl_resource *resource,
 166                       struct wl_resource *seat)
 167 {
 168         struct text_model *text_model = resource->data;
 169         struct weston_seat *weston_seat = seat->data;
 170
 171         deactivate_text_model(text_model,
 172                               weston_seat->input_method);
 173 }
 174
 175 static void
 176 text_model_set_micro_focus(struct wl_client *client,
 177                            struct wl_resource *resource,
 178                            int32_t x,
 179                            int32_t y,
 180                            int32_t width,
 181                            int32_t height)
 182 {
 183 }
 184
 185 static void
 186 text_model_set_preedit(struct wl_client *client,
 187                        struct wl_resource *resource)
 188 {
 189 }
 190
 191 static void
 192 text_model_set_content_type(struct wl_client *client,
 193                             struct wl_resource *resource)
 194 {
 195 }
 196
 197 static const struct text_model_interface text_model_implementation = {
 198         text_model_set_surrounding_text,
 199         text_model_activate,
 200         text_model_deactivate,
 201         text_model_set_micro_focus,
 202         text_model_set_preedit,
 203         text_model_set_content_type
 204 };
 205
 206 static void text_model_factory_create_text_model(struct wl_client *client,
 207                                                  struct wl_resource *resource,
 208                                                  uint32_t id)
 209 {
 210         struct text_model_factory *text_model_factory = resource->data;
 211         struct text_model *text_model;
 212
 213         text_model = calloc(1, sizeof *text_model);
 214
 215         text_model->resource.object.id = id;
 216         text_model->resource.object.interface = &text_model_interface;
 217         text_model->resource.object.implementation =
 218                 (void (**)(void)) &text_model_implementation;
 219
 220         text_model->resource.data = text_model;
 221         text_model->resource.destroy = destroy_text_model;
 222
 223         text_model->ec = text_model_factory->ec;
 224
 225         wl_list_init(&text_model->input_methods);
 226
 227         wl_client_add_resource(client, &text_model->resource);
 228 };
 229
 230 static const struct text_model_factory_interface text_model_factory_implementation = {
 231         text_model_factory_create_text_model
 232 };
 233
 234 static void
 235 bind_text_model_factory(struct wl_client *client,
 236                         void *data,
 237                         uint32_t version,
 238                         uint32_t id)
 239 {
 240         struct text_model_factory *text_model_factory = data;
 241
 242         /* No checking for duplicate binding necessary.
 243          * No events have to be sent, so we don't need the return value. */
 244         wl_client_add_object(client, &text_model_factory_interface,
 245                              &text_model_factory_implementation,
 246                              id, text_model_factory);
 247 }
 248
 249 static void
 250 text_model_factory_notifier_destroy(struct wl_listener *listener, void *data)
 251 {
 252         struct text_model_factory *text_model_factory =
 253                 container_of(listener, struct text_model_factory, destroy_listener);
 254
 255         wl_display_remove_global(text_model_factory->ec->wl_display,
 256                                  text_model_factory->text_model_factory_global);
 257
 258         free(text_model_factory);
 259 }
 260
 261 WL_EXPORT void
 262 text_model_factory_create(struct weston_compositor *ec)
 263 {
 264         struct text_model_factory *text_model_factory;
 265
 266         text_model_factory = calloc(1, sizeof *text_model_factory);
 267
 268         text_model_factory->ec = ec;
 269
 270         text_model_factory->text_model_factory_global =
 271                 wl_display_add_global(ec->wl_display,
 272                                       &text_model_factory_interface,
 273                                       text_model_factory, bind_text_model_factory);
 274
 275         text_model_factory->destroy_listener.notify = text_model_factory_notifier_destroy;
 276         wl_signal_add(&ec->destroy_signal, &text_model_factory->destroy_listener);
 277 }
 278
 279 static void
 280 input_method_context_destroy(struct wl_client *client,
 281                              struct wl_resource *resource)
 282 {
 283         wl_resource_destroy(resource);
 284 }
 285
 286 static void
 287 input_method_context_commit_string(struct wl_client *client,
 288                                    struct wl_resource *resource,
 289                                    const char *text,
 290                                    uint32_t index)
 291 {
 292         struct input_method_context *context = resource->data;
 293
 294         text_model_send_commit_string(&context->model->resource, text, index);
 295 }
 296
 297 static void
 298 input_method_context_preedit_string(struct wl_client *client,
 299                                    struct wl_resource *resource,
 300                                    const char *text,
 301                                    uint32_t index)
 302 {
 303         struct input_method_context *context = resource->data;
 304
 305         text_model_send_preedit_string(&context->model->resource, text, index);
 306 }
 307
 308 static const struct input_method_context_interface input_method_context_implementation = {
 309         input_method_context_destroy,
 310         input_method_context_commit_string,
 311         input_method_context_preedit_string,
 312 };
 313
 314 static void
 315 destroy_input_method_context(struct wl_resource *resource)
 316 {
 317         struct input_method_context *context = resource->data;
 318
 319         free(context);
 320 }
 321
 322 static void
 323 input_method_context_create(struct text_model *model,
 324                             struct input_method *input_method)
 325 {
 326         struct input_method_context *context;
 327
 328         if (!input_method->input_method_binding)
 329                 return;
 330
 331         context = malloc(sizeof *context);
 332         if (context == NULL)
 333                 return;
 334
 335         context->resource.destroy = destroy_input_method_context;
 336         context->resource.object.id = 0;
 337         context->resource.object.interface = &input_method_context_interface;
 338         context->resource.object.implementation =
 339                 (void (**)(void)) &input_method_context_implementation;
 340         context->resource.data = context;
 341         wl_signal_init(&context->resource.destroy_signal);
 342
 343         context->model = model;
 344         input_method->context = context;
 345
 346         wl_client_add_resource(input_method->input_method_binding->client, &context->resource);
 347
 348         input_method_send_activate(input_method->input_method_binding, &context->resource);
 349 }
 350
 351 static void
 352 unbind_input_method(struct wl_resource *resource)
 353 {
 354         struct input_method *input_method = resource->data;
 355
 356         input_method->input_method_binding = NULL;
 357         input_method->context = NULL;
 358
 359         free(resource);
 360 }
 361
 362 static void
 363 bind_input_method(struct wl_client *client,
 364                   void *data,
 365                   uint32_t version,
 366                   uint32_t id)
 367 {
 368         struct input_method *input_method = data;
 369         struct wl_resource *resource;
 370
 371         resource = wl_client_add_object(client, &input_method_interface,
 372                                         NULL,
 373                                         id, input_method);
 374
 375         if (input_method->input_method_binding == NULL) {
 376                 resource->destroy = unbind_input_method;
 377                 input_method->input_method_binding = resource;
 378                 return;
 379         }
 380
 381         wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
 382                                "interface object already bound");
 383         wl_resource_destroy(resource);
 384 }
 385
 386 static void
 387 input_method_notifier_destroy(struct wl_listener *listener, void *data)
 388 {
 389         struct input_method *input_method =
 390                 container_of(listener, struct input_method, destroy_listener);
 391
 392         if (input_method->model)
 393                 deactivate_text_model(input_method->model, input_method);
 394
 395         wl_display_remove_global(input_method->seat->compositor->wl_display,
 396                                  input_method->input_method_global);
 397
 398         free(input_method);
 399 }
 400
 401 static void
 402 handle_keyboard_focus(struct wl_listener *listener, void *data)
 403 {
 404         struct wl_keyboard *keyboard = data;
 405         struct input_method *input_method =
 406                 container_of(listener, struct input_method, keyboard_focus_listener);
 407         struct wl_surface *surface = keyboard->focus;
 408
 409         if (!input_method->model)
 410                 return;
 411
 412         if (!surface || input_method->model->surface != surface)
 413                 deactivate_text_model(input_method->model,
 414                                       input_method);
 415 }
 416
 417 static void
 418 input_method_init_seat(struct weston_seat *seat)
 419 {
 420         if (seat->input_method->focus_listener_initialized)
 421                 return;
 422
 423         if (seat->has_keyboard) {
 424                 seat->input_method->keyboard_focus_listener.notify = handle_keyboard_focus;
 425                 wl_signal_add(&seat->seat.keyboard->focus_signal, &seat->input_method->keyboard_focus_listener);
 426         }
 427
 428         seat->input_method->focus_listener_initialized = 1;
 429 }
 430
 431 WL_EXPORT void
 432 input_method_create(struct weston_compositor *ec,
 433                     struct weston_seat *seat)
 434 {
 435         struct input_method *input_method;
 436
 437         input_method = calloc(1, sizeof *input_method);
 438
 439         input_method->seat = seat;
 440         input_method->model = NULL;
 441         input_method->focus_listener_initialized = 0;
 442         input_method->context = NULL;
 443
 444         input_method->input_method_global =
 445                 wl_display_add_global(ec->wl_display,
 446                                       &input_method_interface,
 447                                       input_method, bind_input_method);
 448
 449         input_method->destroy_listener.notify = input_method_notifier_destroy;
 450         wl_signal_add(&seat->seat.destroy_signal, &input_method->destroy_listener);
 451
 452         seat->input_method = input_method;
 453 }
 454