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_object base;
  40         struct weston_compositor *ec;
  41         struct wl_global *global;
  42         struct wl_listener destroy_listener;
  43         struct wl_list models;
  44
  45         struct text_model *active_model;
  46 };
  47
  48 static void
  49 deactivate_text_model(struct text_model *text_model)
  50 {
  51         struct weston_compositor *ec = text_model->input_method->ec;
  52
  53         if (text_model->input_method->active_model == text_model) {
  54                 text_model->input_method->active_model = NULL;
  55                 wl_signal_emit(&ec->hide_input_panel_signal, ec);
  56         }
  57 }
  58
  59 static void
  60 destroy_text_model(struct wl_resource *resource)
  61 {
  62         struct text_model *text_model =
  63                 container_of(resource, struct text_model, resource);
  64
  65         deactivate_text_model(text_model);
  66
  67         wl_list_remove(&text_model->link);
  68         free(text_model);
  69 }
  70
  71 static void
  72 text_model_set_surrounding_text(struct wl_client *client,
  73                                 struct wl_resource *resource,
  74                                 const char *text)
  75 {
  76 }
  77
  78 static void
  79 text_model_set_cursor_index(struct wl_client *client,
  80                             struct wl_resource *resource,
  81                             uint32_t index)
  82 {
  83 }
  84
  85 static void
  86 text_model_activate(struct wl_client *client,
  87                     struct wl_resource *resource)
  88 {
  89         struct text_model *text_model = resource->data;
  90         struct weston_compositor *ec = text_model->input_method->ec;
  91
  92         text_model->input_method->active_model = text_model;
  93
  94         wl_signal_emit(&ec->show_input_panel_signal, ec);
  95 }
  96
  97 static void
  98 text_model_deactivate(struct wl_client *client,
  99                       struct wl_resource *resource)
 100 {
 101         struct text_model *text_model = resource->data;
 102
 103         deactivate_text_model(text_model);
 104 }
 105
 106 static void
 107 text_model_set_selected_text(struct wl_client *client,
 108                              struct wl_resource *resource,
 109                              const char *text,
 110                              int32_t index)
 111 {
 112 }
 113
 114 static void
 115 text_model_set_micro_focus(struct wl_client *client,
 116                            struct wl_resource *resource,
 117                            int32_t x,
 118                            int32_t y,
 119                            int32_t width,
 120                            int32_t height)
 121 {
 122 }
 123
 124 static void
 125 text_model_set_preedit(struct wl_client *client,
 126                        struct wl_resource *resource)
 127 {
 128 }
 129
 130 static void
 131 text_model_set_content_type(struct wl_client *client,
 132                             struct wl_resource *resource)
 133 {
 134 }
 135
 136 struct text_model_interface text_model_implementation = {
 137         text_model_set_surrounding_text,
 138         text_model_set_cursor_index,
 139         text_model_activate,
 140         text_model_deactivate,
 141         text_model_set_selected_text,
 142         text_model_set_micro_focus,
 143         text_model_set_preedit,
 144         text_model_set_content_type
 145 };
 146
 147 static void input_method_create_text_model(struct wl_client *client,
 148                                            struct wl_resource *resource,
 149                                            uint32_t id,
 150                                            struct wl_resource *surface)
 151 {
 152         struct input_method *input_method = resource->data;
 153         struct text_model *text_model;
 154
 155         text_model = calloc(1, sizeof *text_model);
 156
 157         text_model->resource.destroy = destroy_text_model;
 158
 159         text_model->resource.object.id = id;
 160         text_model->resource.object.interface = &text_model_interface;
 161         text_model->resource.object.implementation =
 162                 (void (**)(void)) &text_model_implementation;
 163         text_model->resource.data = text_model;
 164
 165         text_model->input_method = input_method;
 166
 167         wl_client_add_resource(client, &text_model->resource);
 168
 169         wl_list_insert(&input_method->models, &text_model->link);
 170 };
 171
 172 static void
 173 input_method_commit_string(struct wl_client *client,
 174                            struct wl_resource *resource,
 175                            const char *text,
 176                            uint32_t index)
 177 {
 178         struct input_method *input_method = resource->data;
 179
 180         if (input_method->active_model) {
 181                 text_model_send_commit_string(&input_method->active_model->resource, text, index);
 182         }
 183 }
 184
 185 struct input_method_interface input_method_implementation = {
 186         input_method_create_text_model,
 187         input_method_commit_string
 188 };
 189
 190 static void
 191 bind_input_method(struct wl_client *client,
 192                   void *data,
 193                   uint32_t version,
 194                   uint32_t id)
 195 {
 196         wl_client_add_object(client, &input_method_interface,
 197                              &input_method_implementation, id, data);
 198 }
 199
 200 static void
 201 input_method_notifier_destroy(struct wl_listener *listener, void *data)
 202 {
 203         struct input_method *input_method =
 204                 container_of(listener, struct input_method, destroy_listener);
 205
 206         wl_display_remove_global(input_method->ec->wl_display,
 207                                  input_method->global);
 208         free(input_method);
 209 }
 210
 211 void
 212 input_method_create(struct weston_compositor *ec)
 213 {
 214         struct input_method *input_method;
 215
 216         input_method = calloc(1, sizeof *input_method);
 217
 218         input_method->base.interface = &input_method_interface;
 219         input_method->base.implementation =
 220                 (void(**)(void)) &input_method_implementation;
 221         input_method->ec = ec;
 222         input_method->active_model = NULL;
 223
 224         wl_list_init(&input_method->models);
 225
 226         input_method->global = wl_display_add_global(ec->wl_display,
 227                                                      &input_method_interface,
 228                                                      input_method,
 229                                                      bind_input_method);
 230
 231         input_method->destroy_listener.notify = input_method_notifier_destroy;
 232         wl_signal_add(&ec->destroy_signal, &input_method->destroy_listener);
 233 }