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