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 destroy_text_model(struct wl_resource *resource)
  50 {
  51         struct text_model *text_model = container_of(resource,
  52                                                      struct text_model, resource);
  53
  54         if (text_model->input_method->active_model == text_model) {
  55                 text_model->input_method->active_model = 0;
  56         }
  57
  58         wl_list_remove(&text_model->link);
  59         free(text_model);
  60 }
  61
  62 static void
  63 text_model_set_surrounding_text(struct wl_client *client,
  64                                 struct wl_resource *resource,
  65                                 const char *text)
  66 {
  67 }
  68
  69 static void
  70 text_model_set_cursor_index(struct wl_client *client,
  71                             struct wl_resource *resource,
  72                             uint32_t index)
  73 {
  74 }
  75
  76 static void
  77 text_model_activate(struct wl_client *client,
  78                     struct wl_resource *resource)
  79 {
  80         struct text_model *text_model = resource->data;
  81
  82         text_model->input_method->active_model = text_model;
  83
  84         wl_signal_emit(&text_model->input_method->ec->show_input_panel_signal, text_model->input_method->ec);
  85 }
  86
  87 static void
  88 text_model_deactivate(struct wl_client *client,
  89                       struct wl_resource *resource)
  90 {
  91         struct text_model *text_model = resource->data;
  92
  93         if (text_model->input_method->active_model == text_model) {
  94                 text_model->input_method->active_model = NULL;
  95                 wl_signal_emit(&text_model->input_method->ec->hide_input_panel_signal, text_model->input_method->ec);
  96         }
  97 }
  98
  99 static void
 100 text_model_set_selected_text(struct wl_client *client,
 101                              struct wl_resource *resource,
 102                              const char *text,
 103                              int32_t index)
 104 {
 105 }
 106
 107 static void
 108 text_model_set_micro_focus(struct wl_client *client,
 109                            struct wl_resource *resource,
 110                            int32_t x,
 111                            int32_t y,
 112                            int32_t width,
 113                            int32_t height)
 114 {
 115 }
 116
 117 static void
 118 text_model_set_preedit(struct wl_client *client,
 119                        struct wl_resource *resource)
 120 {
 121 }
 122
 123 static void
 124 text_model_set_content_type(struct wl_client *client,
 125                             struct wl_resource *resource)
 126 {
 127 }
 128
 129 struct text_model_interface text_model_implementation = {
 130         text_model_set_surrounding_text,
 131         text_model_set_cursor_index,
 132         text_model_activate,
 133         text_model_deactivate,
 134         text_model_set_selected_text,
 135         text_model_set_micro_focus,
 136         text_model_set_preedit,
 137         text_model_set_content_type
 138 };
 139
 140 static void input_method_create_text_model(struct wl_client *client,
 141                                            struct wl_resource *resource,
 142                                            uint32_t id,
 143                                            struct wl_resource *surface)
 144 {
 145         struct input_method *input_method = resource->data;
 146         struct text_model *text_model;
 147
 148         text_model = malloc(sizeof *text_model);
 149
 150         text_model->resource.destroy = destroy_text_model;
 151
 152         text_model->resource.object.id = id;
 153         text_model->resource.object.interface = &text_model_interface;
 154         text_model->resource.object.implementation =
 155                 (void (**)(void)) &text_model_implementation;
 156         text_model->resource.data = text_model;
 157
 158         text_model->input_method = input_method;
 159
 160         wl_client_add_resource(client, &text_model->resource);
 161
 162         wl_list_insert(&input_method->models, &text_model->link);
 163 };
 164
 165 static void
 166 input_method_commit_string(struct wl_client *client,
 167                            struct wl_resource *resource,
 168                            const char *text,
 169                            uint32_t index)
 170 {
 171         struct input_method *input_method = resource->data;
 172
 173         if (input_method->active_model) {
 174                 text_model_send_commit_string(&input_method->active_model->resource, text, index);
 175         }
 176 }
 177
 178 struct input_method_interface input_method_implementation = {
 179         input_method_create_text_model,
 180         input_method_commit_string
 181 };
 182
 183 static void
 184 bind_input_method(struct wl_client *client,
 185                   void *data,
 186                   uint32_t version,
 187                   uint32_t id)
 188 {
 189         wl_client_add_object(client, &input_method_interface,
 190                              &input_method_implementation, id, data);
 191 }
 192
 193 static void
 194 input_method_notifier_destroy(struct wl_listener *listener, void *data)
 195 {
 196         struct input_method *input_method = container_of(listener, struct input_method, destroy_listener);
 197
 198         wl_display_remove_global(input_method->ec->wl_display, input_method->global);
 199         free(input_method);
 200 }
 201
 202 void
 203 input_method_create(struct weston_compositor *ec)
 204 {
 205         struct input_method *input_method;
 206
 207         input_method = malloc(sizeof *input_method);
 208
 209         input_method->base.interface = &input_method_interface;
 210         input_method->base.implementation = (void(**)(void)) &input_method_implementation;
 211         input_method->ec = ec;
 212         input_method->active_model = NULL;
 213
 214         wl_list_init(&input_method->models);
 215
 216         input_method->global = wl_display_add_global(ec->wl_display,
 217                                                      &input_method_interface,
 218                                                      input_method, bind_input_method);
 219
 220         input_method->destroy_listener.notify = input_method_notifier_destroy;
 221         wl_signal_add(&ec->destroy_signal, &input_method->destroy_listener);
 222 }