src/text-backend.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 <stdlib.h>
  24
  25 #include "compositor.h"
  26 #include "text-server-protocol.h"
  27
  28 struct input_method;
  29
  30 struct text_model {
  31         struct wl_resource resource;
  32
  33         struct weston_compositor *ec;
  34
  35         struct wl_list input_methods;
  36 };
  37
  38 struct input_method {
  39         struct wl_resource *input_method_binding;
  40         struct wl_global *input_method_global;
  41         struct wl_global *text_model_factory_global;
  42         struct wl_listener destroy_listener;
  43
  44         struct weston_compositor *ec;
  45         struct text_model *model;
  46
  47         struct wl_list link;
  48 };
  49
  50 static void
  51 deactivate_text_model(struct text_model *text_model,
  52                       struct input_method *input_method)
  53 {
  54         struct weston_compositor *ec = text_model->ec;
  55
  56         if (input_method->model == text_model) {
  57                 wl_list_remove(&input_method->link);
  58                 input_method->model = NULL;
  59                 wl_signal_emit(&ec->hide_input_panel_signal, ec);
  60                 text_model_send_deactivated(&text_model->resource);
  61         }
  62 }
  63
  64 static void
  65 destroy_text_model(struct wl_resource *resource)
  66 {
  67         struct text_model *text_model =
  68                 container_of(resource, struct text_model, resource);
  69         struct input_method *input_method, *next;
  70
  71         wl_list_for_each_safe(input_method, next, &text_model->input_methods, link)
  72                 deactivate_text_model(text_model, input_method);
  73
  74         free(text_model);
  75 }
  76
  77 static void
  78 text_model_set_surrounding_text(struct wl_client *client,
  79                                 struct wl_resource *resource,
  80                                 const char *text)
  81 {
  82 }
  83
  84 static void
  85 text_model_set_cursor_index(struct wl_client *client,
  86                             struct wl_resource *resource,
  87                             uint32_t index)
  88 {
  89 }
  90
  91 static void
  92 text_model_activate(struct wl_client *client,
  93                     struct wl_resource *resource,
  94                     struct wl_resource *seat,
  95                     struct wl_resource *surface)
  96 {
  97         struct text_model *text_model = resource->data;
  98         struct weston_seat *weston_seat = seat->data;
  99         struct text_model *old = weston_seat->input_method->model;
 100         struct weston_compositor *ec = text_model->ec;
 101
 102         if (old == text_model)
 103                 return;
 104
 105         if (old) {
 106                 deactivate_text_model(old,
 107                                       weston_seat->input_method);
 108         }
 109
 110         weston_seat->input_method->model = text_model;
 111         wl_list_insert(&text_model->input_methods, &weston_seat->input_method->link);
 112
 113         wl_signal_emit(&ec->show_input_panel_signal, ec);
 114
 115         text_model_send_activated(&text_model->resource);
 116 }
 117
 118 static void
 119 text_model_deactivate(struct wl_client *client,
 120                       struct wl_resource *resource,
 121                       struct wl_resource *seat)
 122 {
 123         struct text_model *text_model = resource->data;
 124         struct weston_seat *weston_seat = seat->data;
 125
 126         deactivate_text_model(text_model,
 127                               weston_seat->input_method);
 128 }
 129
 130 static void
 131 text_model_set_selected_text(struct wl_client *client,
 132                              struct wl_resource *resource,
 133                              const char *text,
 134                              int32_t index)
 135 {
 136 }
 137
 138 static void
 139 text_model_set_micro_focus(struct wl_client *client,
 140                            struct wl_resource *resource,
 141                            int32_t x,
 142                            int32_t y,
 143                            int32_t width,
 144                            int32_t height)
 145 {
 146 }
 147
 148 static void
 149 text_model_set_preedit(struct wl_client *client,
 150                        struct wl_resource *resource)
 151 {
 152 }
 153
 154 static void
 155 text_model_set_content_type(struct wl_client *client,
 156                             struct wl_resource *resource)
 157 {
 158 }
 159
 160 static const struct text_model_interface text_model_implementation = {
 161         text_model_set_surrounding_text,
 162         text_model_set_cursor_index,
 163         text_model_activate,
 164         text_model_deactivate,
 165         text_model_set_selected_text,
 166         text_model_set_micro_focus,
 167         text_model_set_preedit,
 168         text_model_set_content_type
 169 };
 170
 171 static void text_model_factory_create_text_model(struct wl_client *client,
 172                                                  struct wl_resource *resource,
 173                                                  uint32_t id,
 174                                                  struct wl_resource *surface)
 175 {
 176         struct input_method *input_method = resource->data;
 177         struct text_model *text_model;
 178
 179         text_model = calloc(1, sizeof *text_model);
 180
 181         text_model->resource.destroy = destroy_text_model;
 182
 183         text_model->resource.object.id = id;
 184         text_model->resource.object.interface = &text_model_interface;
 185         text_model->resource.object.implementation =
 186                 (void (**)(void)) &text_model_implementation;
 187         text_model->resource.data = text_model;
 188
 189         text_model->ec = input_method->ec;
 190
 191         wl_client_add_resource(client, &text_model->resource);
 192
 193         wl_list_init(&text_model->input_methods);
 194 };
 195
 196 static const struct text_model_factory_interface text_model_factory_implementation = {
 197         text_model_factory_create_text_model
 198 };
 199
 200 static void
 201 bind_text_model_factory(struct wl_client *client,
 202                         void *data,
 203                         uint32_t version,
 204                         uint32_t id)
 205 {
 206         struct input_method *input_method = data;
 207
 208         /* No checking for duplicate binding necessary.
 209          * No events have to be sent, so we don't need the return value. */
 210         wl_client_add_object(client, &text_model_factory_interface,
 211                              &text_model_factory_implementation,
 212                              id, input_method);
 213 }
 214
 215 static void
 216 input_method_commit_string(struct wl_client *client,
 217                            struct wl_resource *resource,
 218                            const char *text,
 219                            uint32_t index)
 220 {
 221         struct input_method *input_method = resource->data;
 222
 223         if (input_method->model) {
 224                 text_model_send_commit_string(&input_method->model->resource, text, index);
 225         }
 226 }
 227
 228 static const struct input_method_interface input_method_implementation = {
 229         input_method_commit_string
 230 };
 231
 232 static void
 233 unbind_input_method(struct wl_resource *resource)
 234 {
 235         struct input_method *input_method = resource->data;
 236
 237         input_method->input_method_binding = NULL;
 238         free(resource);
 239 }
 240
 241 static void
 242 bind_input_method(struct wl_client *client,
 243                   void *data,
 244                   uint32_t version,
 245                   uint32_t id)
 246 {
 247         struct input_method *input_method = data;
 248         struct wl_resource *resource;
 249
 250         resource = wl_client_add_object(client, &input_method_interface,
 251                                         &input_method_implementation,
 252                                         id, input_method);
 253
 254         if (input_method->input_method_binding == NULL) {
 255                 resource->destroy = unbind_input_method;
 256                 input_method->input_method_binding = resource;
 257                 return;
 258         }
 259
 260         wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
 261                                "interface object already bound");
 262         wl_resource_destroy(resource);
 263 }
 264
 265 static void
 266 input_method_notifier_destroy(struct wl_listener *listener, void *data)
 267 {
 268         struct input_method *input_method =
 269                 container_of(listener, struct input_method, destroy_listener);
 270
 271         wl_display_remove_global(input_method->ec->wl_display,
 272                                  input_method->input_method_global);
 273         wl_display_remove_global(input_method->ec->wl_display,
 274                                  input_method->text_model_factory_global);
 275         free(input_method);
 276 }
 277
 278 void
 279 input_method_create(struct weston_compositor *ec,
 280                     struct weston_seat *seat)
 281 {
 282         struct input_method *input_method;
 283
 284         input_method = calloc(1, sizeof *input_method);
 285
 286         input_method->ec = ec;
 287         input_method->model = NULL;
 288
 289         input_method->input_method_global =
 290                 wl_display_add_global(ec->wl_display,
 291                                       &input_method_interface,
 292                                       input_method, bind_input_method);
 293
 294         input_method->text_model_factory_global =
 295                 wl_display_add_global(ec->wl_display,
 296                                       &text_model_factory_interface,
 297                                       input_method, bind_text_model_factory);
 298
 299         input_method->destroy_listener.notify = input_method_notifier_destroy;
 300         wl_signal_add(&ec->destroy_signal, &input_method->destroy_listener);
 301
 302         seat->input_method = input_method;
 303 }