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