libempathy-gtk/gossip-cell-renderer-text.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2004-2007 Imendio AB
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public
  16  * License along with this program; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Authors: Mikael Hallendal <micke@imendio.com>
  21  */
  22
  23 #include "config.h"
  24
  25 #include <string.h>
  26
  27 #include "gossip-cell-renderer-text.h"
  28
  29 #define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GOSSIP_TYPE_CELL_RENDERER_TEXT, GossipCellRendererTextPriv))
  30
  31 struct _GossipCellRendererTextPriv {
  32         gchar    *name;
  33         gchar    *status;
  34         gboolean  is_group;
  35
  36         gboolean  is_valid;
  37         gboolean  is_selected;
  38
  39         gboolean  show_status;
  40 };
  41
  42 static void gossip_cell_renderer_text_class_init (GossipCellRendererTextClass *klass);
  43 static void gossip_cell_renderer_text_init       (GossipCellRendererText      *cell);
  44 static void cell_renderer_text_finalize          (GObject                     *object);
  45 static void cell_renderer_text_get_property      (GObject                     *object,
  46                                                   guint                        param_id,
  47                                                   GValue                      *value,
  48                                                   GParamSpec                  *pspec);
  49 static void cell_renderer_text_set_property      (GObject                     *object,
  50                                                   guint                        param_id,
  51                                                   const GValue                *value,
  52                                                   GParamSpec                  *pspec);
  53 static void cell_renderer_text_get_size          (GtkCellRenderer             *cell,
  54                                                   GtkWidget                   *widget,
  55                                                   GdkRectangle                *cell_area,
  56                                                   gint                        *x_offset,
  57                                                   gint                        *y_offset,
  58                                                   gint                        *width,
  59                                                   gint                        *height);
  60 static void cell_renderer_text_render            (GtkCellRenderer             *cell,
  61                                                   GdkDrawable                 *window,
  62                                                   GtkWidget                   *widget,
  63                                                   GdkRectangle                *background_area,
  64                                                   GdkRectangle                *cell_area,
  65                                                   GdkRectangle                *expose_area,
  66                                                   GtkCellRendererState         flags);
  67 static void cell_renderer_text_update_text       (GossipCellRendererText      *cell,
  68                                                   GtkWidget                   *widget,
  69                                                   gboolean                     selected);
  70
  71 /* Properties */
  72 enum {
  73         PROP_0,
  74         PROP_NAME,
  75         PROP_STATUS,
  76         PROP_IS_GROUP,
  77         PROP_SHOW_STATUS,
  78 };
  79
  80 G_DEFINE_TYPE (GossipCellRendererText, gossip_cell_renderer_text, GTK_TYPE_CELL_RENDERER_TEXT);
  81
  82 static void
  83 gossip_cell_renderer_text_class_init (GossipCellRendererTextClass *klass)
  84 {
  85         GObjectClass         *object_class;
  86         GtkCellRendererClass *cell_class;
  87
  88         object_class = G_OBJECT_CLASS (klass);
  89         cell_class = GTK_CELL_RENDERER_CLASS (klass);
  90
  91         object_class->finalize = cell_renderer_text_finalize;
  92
  93         object_class->get_property = cell_renderer_text_get_property;
  94         object_class->set_property = cell_renderer_text_set_property;
  95
  96         cell_class->get_size = cell_renderer_text_get_size;
  97         cell_class->render = cell_renderer_text_render;
  98
  99         g_object_class_install_property (object_class,
 100                                          PROP_NAME,
 101                                          g_param_spec_string ("name",
 102                                                               "Name",
 103                                                               "Contact name",
 104                                                               NULL,
 105                                                               G_PARAM_READWRITE));
 106         g_object_class_install_property (object_class,
 107                                          PROP_STATUS,
 108                                          g_param_spec_string ("status",
 109                                                               "Status",
 110                                                               "Contact status string",
 111                                                               NULL,
 112                                                               G_PARAM_READWRITE));
 113         g_object_class_install_property (object_class,
 114                                          PROP_IS_GROUP,
 115                                          g_param_spec_boolean ("is_group",
 116                                                                "Is group",
 117                                                                "Whether this cell is a group",
 118                                                                FALSE,
 119                                                                G_PARAM_READWRITE));
 120         g_object_class_install_property (object_class,
 121                                          PROP_SHOW_STATUS,
 122                                          g_param_spec_boolean ("show-status",
 123                                                                "Show status",
 124                                                                "Whether to show the status line",
 125                                                                TRUE,
 126                                                                G_PARAM_READWRITE));
 127
 128         g_type_class_add_private (object_class, sizeof (GossipCellRendererTextPriv));
 129 }
 130
 131 static void
 132 gossip_cell_renderer_text_init (GossipCellRendererText *cell)
 133 {
 134         GossipCellRendererTextPriv *priv;
 135
 136         priv = GET_PRIV (cell);
 137
 138         g_object_set (cell,
 139                       "ellipsize", PANGO_ELLIPSIZE_END,
 140                       NULL);
 141
 142         priv->name = g_strdup ("");
 143         priv->status = g_strdup ("");
 144         priv->show_status = TRUE;
 145 }
 146
 147 static void
 148 cell_renderer_text_finalize (GObject *object)
 149 {
 150         GossipCellRendererText     *cell;
 151         GossipCellRendererTextPriv *priv;
 152
 153         cell = GOSSIP_CELL_RENDERER_TEXT (object);
 154         priv = GET_PRIV (cell);
 155
 156         g_free (priv->name);
 157         g_free (priv->status);
 158
 159         (G_OBJECT_CLASS (gossip_cell_renderer_text_parent_class)->finalize) (object);
 160 }
 161
 162 static void
 163 cell_renderer_text_get_property (GObject    *object,
 164                                  guint       param_id,
 165                                  GValue     *value,
 166                                  GParamSpec *pspec)
 167 {
 168         GossipCellRendererText     *cell;
 169         GossipCellRendererTextPriv *priv;
 170
 171         cell = GOSSIP_CELL_RENDERER_TEXT (object);
 172         priv = GET_PRIV (cell);
 173
 174         switch (param_id) {
 175         case PROP_NAME:
 176                 g_value_set_string (value, priv->name);
 177                 break;
 178         case PROP_STATUS:
 179                 g_value_set_string (value, priv->status);
 180                 break;
 181         case PROP_IS_GROUP:
 182                 g_value_set_boolean (value, priv->is_group);
 183                 break;
 184         case PROP_SHOW_STATUS:
 185                 g_value_set_boolean (value, priv->show_status);
 186                 break;
 187         default:
 188                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 189                 break;
 190         }
 191 }
 192
 193 static void
 194 cell_renderer_text_set_property (GObject      *object,
 195                                  guint         param_id,
 196                                  const GValue *value,
 197                                  GParamSpec   *pspec)
 198 {
 199         GossipCellRendererText     *cell;
 200         GossipCellRendererTextPriv *priv;
 201         const gchar                *str;
 202
 203         cell = GOSSIP_CELL_RENDERER_TEXT (object);
 204         priv = GET_PRIV (cell);
 205
 206         switch (param_id) {
 207         case PROP_NAME:
 208                 g_free (priv->name);
 209                 str = g_value_get_string (value);
 210                 priv->name = g_strdup (str ? str : "");
 211                 g_strdelimit (priv->name, "\n\r\t", ' ');
 212                 priv->is_valid = FALSE;
 213                 break;
 214         case PROP_STATUS:
 215                 g_free (priv->status);
 216                 str = g_value_get_string (value);
 217                 priv->status = g_strdup (str ? str : "");
 218                 g_strdelimit (priv->status, "\n\r\t", ' ');
 219                 priv->is_valid = FALSE;
 220                 break;
 221         case PROP_IS_GROUP:
 222                 priv->is_group = g_value_get_boolean (value);
 223                 priv->is_valid = FALSE;
 224                 break;
 225         case PROP_SHOW_STATUS:
 226                 priv->show_status = g_value_get_boolean (value);
 227                 priv->is_valid = FALSE;
 228                 break;
 229         default:
 230                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 231                 break;
 232         }
 233 }
 234
 235 static void
 236 cell_renderer_text_get_size (GtkCellRenderer *cell,
 237                              GtkWidget       *widget,
 238                              GdkRectangle    *cell_area,
 239                              gint            *x_offset,
 240                              gint            *y_offset,
 241                              gint            *width,
 242                              gint            *height)
 243 {
 244         GossipCellRendererText     *celltext;
 245         GossipCellRendererTextPriv *priv;
 246
 247         celltext = GOSSIP_CELL_RENDERER_TEXT (cell);
 248         priv = GET_PRIV (cell);
 249
 250         /* Only update if not already valid so we get the right size. */
 251         cell_renderer_text_update_text (celltext, widget, priv->is_selected);
 252
 253         (GTK_CELL_RENDERER_CLASS (gossip_cell_renderer_text_parent_class)->get_size) (cell, widget,
 254                                                                                       cell_area,
 255                                                                                       x_offset, y_offset,
 256                                                                                       width, height);
 257 }
 258
 259 static void
 260 cell_renderer_text_render (GtkCellRenderer      *cell,
 261                            GdkWindow            *window,
 262                            GtkWidget            *widget,
 263                            GdkRectangle         *background_area,
 264                            GdkRectangle         *cell_area,
 265                            GdkRectangle         *expose_area,
 266                            GtkCellRendererState  flags)
 267 {
 268         GossipCellRendererText *celltext;
 269
 270         celltext = GOSSIP_CELL_RENDERER_TEXT (cell);
 271
 272         cell_renderer_text_update_text (celltext,
 273                                         widget,
 274                                         (flags & GTK_CELL_RENDERER_SELECTED));
 275
 276         (GTK_CELL_RENDERER_CLASS (gossip_cell_renderer_text_parent_class)->render) (
 277                 cell, window,
 278                 widget,
 279                 background_area,
 280                 cell_area,
 281                 expose_area, flags);
 282 }
 283
 284 static void
 285 cell_renderer_text_update_text (GossipCellRendererText *cell,
 286                                 GtkWidget              *widget,
 287                                 gboolean                selected)
 288 {
 289         GossipCellRendererTextPriv *priv;
 290         PangoAttrList              *attr_list;
 291         PangoAttribute             *attr_color, *attr_style, *attr_size;
 292         GtkStyle                   *style;
 293         gchar                      *str;
 294
 295         priv = GET_PRIV (cell);
 296
 297         if (priv->is_valid && priv->is_selected == selected) {
 298                 return;
 299         }
 300
 301         if (priv->is_group) {
 302                 g_object_set (cell,
 303                               "visible", TRUE,
 304                               "weight", PANGO_WEIGHT_BOLD,
 305                               "text", priv->name,
 306                               "attributes", NULL,
 307                               "xpad", 1,
 308                               "ypad", 1,
 309                               NULL);
 310
 311                 priv->is_selected = selected;
 312                 priv->is_valid = TRUE;
 313                 return;
 314         }
 315
 316         style = gtk_widget_get_style (widget);
 317
 318         attr_list = pango_attr_list_new ();
 319
 320         attr_style = pango_attr_style_new (PANGO_STYLE_ITALIC);
 321         attr_style->start_index = strlen (priv->name) + 1;
 322         attr_style->end_index = -1;
 323         pango_attr_list_insert (attr_list, attr_style);
 324
 325         if (!selected) {
 326                 GdkColor color;
 327
 328                 color = style->text_aa[GTK_STATE_NORMAL];
 329
 330                 attr_color = pango_attr_foreground_new (color.red, color.green, color.blue);
 331                 attr_color->start_index = attr_style->start_index;
 332                 attr_color->end_index = -1;
 333                 pango_attr_list_insert (attr_list, attr_color);
 334         }
 335
 336         attr_size = pango_attr_size_new (pango_font_description_get_size (style->font_desc) / 1.2);
 337
 338         attr_size->start_index = attr_style->start_index;
 339         attr_size->end_index = -1;
 340         pango_attr_list_insert (attr_list, attr_size);
 341
 342         if (!priv->status || !priv->status[0] || !priv->show_status) {
 343                 str = g_strdup (priv->name);
 344         } else {
 345                 str = g_strdup_printf ("%s\n%s", priv->name, priv->status);
 346         }
 347
 348         g_object_set (cell,
 349                       "visible", TRUE,
 350                       "weight", PANGO_WEIGHT_NORMAL,
 351                       "text", str,
 352                       "attributes", attr_list,
 353                       "xpad", 0,
 354                       "ypad", 1,
 355                       NULL);
 356
 357         g_free (str);
 358         pango_attr_list_unref (attr_list);
 359
 360         priv->is_selected = selected;
 361         priv->is_valid = TRUE;
 362 }
 363
 364 GtkCellRenderer *
 365 gossip_cell_renderer_text_new (void)
 366 {
 367         return g_object_new (GOSSIP_TYPE_CELL_RENDERER_TEXT, NULL);
 368 }