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