Pileus Git - ~andy/gtk/blob - gtk/gtkcellrenderertext.c

   1 /* gtkcellrenderertext.c
   2  * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <stdlib.h>
  21 #include "gtkcellrenderertext.h"
  22 #include "gtkintl.h"
  23
  24 static void gtk_cell_renderer_text_init       (GtkCellRendererText      *celltext);
  25 static void gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class);
  26 static void gtk_cell_renderer_text_finalize   (GObject                  *object);
  27
  28 static void gtk_cell_renderer_text_get_property  (GObject                  *object,
  29                                                   guint                     param_id,
  30                                                   GValue                   *value,
  31                                                   GParamSpec               *pspec);
  32 static void gtk_cell_renderer_text_set_property  (GObject                  *object,
  33                                                   guint                     param_id,
  34                                                   const GValue             *value,
  35                                                   GParamSpec               *pspec);
  36 static void gtk_cell_renderer_text_get_size   (GtkCellRenderer          *cell,
  37                                                GtkWidget                *widget,
  38                                                GdkRectangle             *cell_area,
  39                                                gint                     *x_offset,
  40                                                gint                     *y_offset,
  41                                                gint                     *width,
  42                                                gint                     *height);
  43 static void gtk_cell_renderer_text_render     (GtkCellRenderer          *cell,
  44                                                GdkWindow                *window,
  45                                                GtkWidget                *widget,
  46                                                GdkRectangle             *background_area,
  47                                                GdkRectangle             *cell_area,
  48                                                GdkRectangle             *expose_area,
  49                                                guint                     flags);
  50
  51
  52
  53 enum {
  54   PROP_0,
  55
  56   PROP_TEXT,
  57   PROP_MARKUP,
  58   PROP_ATTRIBUTES,
  59
  60   /* Style args */
  61   PROP_BACKGROUND,
  62   PROP_FOREGROUND,
  63   PROP_BACKGROUND_GDK,
  64   PROP_FOREGROUND_GDK,
  65   PROP_FONT,
  66   PROP_FONT_DESC,
  67   PROP_FAMILY,
  68   PROP_STYLE,
  69   PROP_VARIANT,
  70   PROP_WEIGHT,
  71   PROP_STRETCH,
  72   PROP_SIZE,
  73   PROP_SIZE_POINTS,
  74   PROP_SCALE,
  75   PROP_EDITABLE,
  76   PROP_STRIKETHROUGH,
  77   PROP_UNDERLINE,
  78   PROP_RISE,
  79
  80   /* Whether-a-style-arg-is-set args */
  81   PROP_BACKGROUND_SET,
  82   PROP_FOREGROUND_SET,
  83   PROP_FAMILY_SET,
  84   PROP_STYLE_SET,
  85   PROP_VARIANT_SET,
  86   PROP_WEIGHT_SET,
  87   PROP_STRETCH_SET,
  88   PROP_SIZE_SET,
  89   PROP_SCALE_SET,
  90   PROP_EDITABLE_SET,
  91   PROP_STRIKETHROUGH_SET,
  92   PROP_UNDERLINE_SET,
  93   PROP_RISE_SET
  94 };
  95
  96 static gpointer parent_class;
  97
  98 GtkType
  99 gtk_cell_renderer_text_get_type (void)
 100 {
 101   static GtkType cell_text_type = 0;
 102
 103   if (!cell_text_type)
 104     {
 105       static const GTypeInfo cell_text_info =
 106       {
 107         sizeof (GtkCellRendererTextClass),
 108         NULL,           /* base_init */
 109         NULL,           /* base_finalize */
 110         (GClassInitFunc) gtk_cell_renderer_text_class_init,
 111         NULL,           /* class_finalize */
 112         NULL,           /* class_data */
 113         sizeof (GtkCellRendererText),
 114         0,              /* n_preallocs */
 115         (GInstanceInitFunc) gtk_cell_renderer_text_init,
 116       };
 117
 118       cell_text_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererText", &cell_text_info, 0);
 119     }
 120
 121   return cell_text_type;
 122 }
 123
 124 static void
 125 gtk_cell_renderer_text_init (GtkCellRendererText *celltext)
 126 {
 127   GTK_CELL_RENDERER (celltext)->xalign = 0.0;
 128   GTK_CELL_RENDERER (celltext)->yalign = 0.5;
 129   GTK_CELL_RENDERER (celltext)->xpad = 2;
 130   GTK_CELL_RENDERER (celltext)->ypad = 2;
 131
 132   celltext->fixed_height_rows = -1;
 133 }
 134
 135 static void
 136 gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
 137 {
 138   GObjectClass *object_class = G_OBJECT_CLASS (class);
 139   GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
 140
 141   parent_class = g_type_class_peek_parent (class);
 142
 143   object_class->finalize = gtk_cell_renderer_text_finalize;
 144
 145   object_class->get_property = gtk_cell_renderer_text_get_property;
 146   object_class->set_property = gtk_cell_renderer_text_set_property;
 147
 148   cell_class->get_size = gtk_cell_renderer_text_get_size;
 149   cell_class->render = gtk_cell_renderer_text_render;
 150
 151   g_object_class_install_property (object_class,
 152                                    PROP_TEXT,
 153                                    g_param_spec_string ("text",
 154                                                         _("Text"),
 155                                                         _("Text to render"),
 156                                                         NULL,
 157                                                         G_PARAM_READWRITE));
 158
 159   g_object_class_install_property (object_class,
 160                                    PROP_MARKUP,
 161                                    g_param_spec_string ("markup",
 162                                                         _("Markup"),
 163                                                         _("Marked up text to render"),
 164                                                         NULL,
 165                                                         G_PARAM_WRITABLE));
 166
 167   g_object_class_install_property (gobject_class,
 168                                    PROP_ATTRIBUTES,
 169                                    g_param_spec_boxed ("attributes",
 170                                                        _("Attributes"),
 171                                                        _("A list of style attributes to apply to the text of the renderer."),
 172                                                        PANGO_TYPE_ATTR_LIST,
 173                                                        G_PARAM_READWRITE));
 174
 175   g_object_class_install_property (object_class,
 176                                    PROP_BACKGROUND,
 177                                    g_param_spec_string ("background",
 178                                                         _("Background color name"),
 179                                                         _("Background color as a string"),
 180                                                         NULL,
 181                                                         G_PARAM_WRITABLE));
 182
 183   g_object_class_install_property (object_class,
 184                                    PROP_BACKGROUND_GDK,
 185                                    g_param_spec_boxed ("background_gdk",
 186                                                        _("Background color"),
 187                                                        _("Background color as a GdkColor"),
 188                                                        GDK_TYPE_COLOR,
 189                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 190
 191   g_object_class_install_property (object_class,
 192                                    PROP_FOREGROUND,
 193                                    g_param_spec_string ("foreground",
 194                                                         _("Foreground color name"),
 195                                                         _("Foreground color as a string"),
 196                                                         NULL,
 197                                                         G_PARAM_WRITABLE));
 198
 199   g_object_class_install_property (object_class,
 200                                    PROP_FOREGROUND_GDK,
 201                                    g_param_spec_boxed ("foreground_gdk",
 202                                                        _("Foreground color"),
 203                                                        _("Foreground color as a GdkColor"),
 204                                                        GDK_TYPE_COLOR,
 205                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 206
 207
 208   g_object_class_install_property (object_class,
 209                                    PROP_EDITABLE,
 210                                    g_param_spec_boolean ("editable",
 211                                                          _("Editable"),
 212                                                          _("Whether the text can be modified by the user"),
 213                                                          TRUE,
 214                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 215
 216   g_object_class_install_property (object_class,
 217                                    PROP_FONT,
 218                                    g_param_spec_string ("font",
 219                                                         _("Font"),
 220                                                         _("Font description as a string"),
 221                                                         NULL,
 222                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 223
 224   g_object_class_install_property (object_class,
 225                                    PROP_FONT_DESC,
 226                                    g_param_spec_boxed ("font_desc",
 227                                                        _("Font"),
 228                                                        _("Font description as a PangoFontDescription struct"),
 229                                                        PANGO_TYPE_FONT_DESCRIPTION,
 230                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 231
 232
 233   g_object_class_install_property (object_class,
 234                                    PROP_FAMILY,
 235                                    g_param_spec_string ("family",
 236                                                         _("Font family"),
 237                                                         _("Name of the font family, e.g. Sans, Helvetica, Times, Monospace"),
 238                                                         NULL,
 239                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 240
 241   g_object_class_install_property (object_class,
 242                                    PROP_STYLE,
 243                                    g_param_spec_enum ("style",
 244                                                       _("Font style"),
 245                                                       _("Font style"),
 246                                                       PANGO_TYPE_STYLE,
 247                                                       PANGO_STYLE_NORMAL,
 248                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 249
 250   g_object_class_install_property (object_class,
 251                                    PROP_VARIANT,
 252                                    g_param_spec_enum ("variant",
 253                                                      _("Font variant"),
 254                                                      _("Font variant"),
 255                                                       PANGO_TYPE_VARIANT,
 256                                                       PANGO_VARIANT_NORMAL,
 257                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 258
 259   g_object_class_install_property (object_class,
 260                                    PROP_WEIGHT,
 261                                    g_param_spec_int ("weight",
 262                                                      _("Font weight"),
 263                                                      _("Font weight"),
 264                                                      0,
 265                                                      G_MAXINT,
 266                                                      PANGO_WEIGHT_NORMAL,
 267                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 268
 269
 270   g_object_class_install_property (object_class,
 271                                    PROP_STRETCH,
 272                                    g_param_spec_enum ("stretch",
 273                                                       _("Font stretch"),
 274                                                       _("Font stretch"),
 275                                                       PANGO_TYPE_STRETCH,
 276                                                       PANGO_STRETCH_NORMAL,
 277                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 278
 279   g_object_class_install_property (object_class,
 280                                    PROP_SIZE,
 281                                    g_param_spec_int ("size",
 282                                                      _("Font size"),
 283                                                      _("Font size"),
 284                                                      0,
 285                                                      G_MAXINT,
 286                                                      0,
 287                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 288
 289   g_object_class_install_property (object_class,
 290                                    PROP_SIZE_POINTS,
 291                                    g_param_spec_double ("size_points",
 292                                                         _("Font points"),
 293                                                         _("Font size in points"),
 294                                                         0.0,
 295                                                         G_MAXDOUBLE,
 296                                                         0.0,
 297                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 298
 299   g_object_class_install_property (object_class,
 300                                    PROP_SCALE,
 301                                    g_param_spec_double ("scale",
 302                                                         _("Font scale"),
 303                                                         _("Font scaling factor"),
 304                                                         0.0,
 305                                                         G_MAXDOUBLE,
 306                                                         1.0,
 307                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 308
 309   g_object_class_install_property (object_class,
 310                                    PROP_RISE,
 311                                    g_param_spec_int ("rise",
 312                                                      _("Rise"),
 313                                                      _("Offset of text above the baseline (below the baseline if rise is negative)"),
 314                                                      -G_MAXINT,
 315                                                      G_MAXINT,
 316                                                      0,
 317                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 318
 319
 320   g_object_class_install_property (object_class,
 321                                    PROP_STRIKETHROUGH,
 322                                    g_param_spec_boolean ("strikethrough",
 323                                                          _("Strikethrough"),
 324                                                          _("Whether to strike through the text"),
 325                                                          FALSE,
 326                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 327
 328   g_object_class_install_property (object_class,
 329                                    PROP_UNDERLINE,
 330                                    g_param_spec_enum ("underline",
 331                                                       _("Underline"),
 332                                                       _("Style of underline for this text"),
 333                                                       PANGO_TYPE_UNDERLINE,
 334                                                       PANGO_UNDERLINE_NONE,
 335                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 336
 337   /* Style props are set or not */
 338
 339 #define ADD_SET_PROP(propname, propval, nick, blurb) g_object_class_install_property (object_class, propval, g_param_spec_boolean (propname, nick, blurb, FALSE, G_PARAM_READABLE | G_PARAM_WRITABLE))
 340
 341   ADD_SET_PROP ("background_set", PROP_BACKGROUND_SET,
 342                 _("Background set"),
 343                 _("Whether this tag affects the background color"));
 344
 345   ADD_SET_PROP ("foreground_set", PROP_FOREGROUND_SET,
 346                 _("Foreground set"),
 347                 _("Whether this tag affects the foreground color"));
 348
 349   ADD_SET_PROP ("editable_set", PROP_EDITABLE_SET,
 350                 _("Editability set"),
 351                 _("Whether this tag affects text editability"));
 352
 353   ADD_SET_PROP ("family_set", PROP_FAMILY_SET,
 354                 _("Font family set"),
 355                 _("Whether this tag affects the font family"));
 356
 357   ADD_SET_PROP ("style_set", PROP_STYLE_SET,
 358                 _("Font style set"),
 359                 _("Whether this tag affects the font style"));
 360
 361   ADD_SET_PROP ("variant_set", PROP_VARIANT_SET,
 362                 _("Font variant set"),
 363                 _("Whether this tag affects the font variant"));
 364
 365   ADD_SET_PROP ("weight_set", PROP_WEIGHT_SET,
 366                 _("Font weight set"),
 367                 _("Whether this tag affects the font weight"));
 368
 369   ADD_SET_PROP ("stretch_set", PROP_STRETCH_SET,
 370                 _("Font stretch set"),
 371                 _("Whether this tag affects the font stretch"));
 372
 373   ADD_SET_PROP ("size_set", PROP_SIZE_SET,
 374                 _("Font size set"),
 375                 _("Whether this tag affects the font size"));
 376
 377   ADD_SET_PROP ("scale_set", PROP_SCALE_SET,
 378                 _("Font scale set"),
 379                 _("Whether this tag scales the font size by a factor"));
 380
 381   ADD_SET_PROP ("rise_set", PROP_RISE_SET,
 382                 _("Rise set"),
 383                 _("Whether this tag affects the rise"));
 384
 385   ADD_SET_PROP ("strikethrough_set", PROP_STRIKETHROUGH_SET,
 386                 _("Strikethrough set"),
 387                 _("Whether this tag affects strikethrough"));
 388
 389   ADD_SET_PROP ("underline_set", PROP_UNDERLINE_SET,
 390                 _("Underline set"),
 391                 _("Whether this tag affects underlining"));
 392 }
 393
 394 static void
 395 gtk_cell_renderer_text_finalize (GObject *object)
 396 {
 397   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 398
 399   if (celltext->font.family_name)
 400     g_free (celltext->font.family_name);
 401
 402   if (celltext->text)
 403     g_free (celltext->text);
 404
 405   if (celltext->extra_attrs)
 406     pango_attr_list_unref (celltext->extra_attrs);
 407
 408   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
 409 }
 410
 411 static void
 412 gtk_cell_renderer_text_get_property (GObject        *object,
 413                                      guint           param_id,
 414                                      GValue         *value,
 415                                      GParamSpec     *pspec)
 416 {
 417   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 418
 419   switch (param_id)
 420     {
 421     case PROP_TEXT:
 422       g_value_set_string (value, celltext->text);
 423       break;
 424
 425     case PROP_ATTRIBUTES:
 426       g_value_set_boxed (value, celltext->extra_attrs);
 427       break;
 428
 429     case PROP_BACKGROUND_GDK:
 430       {
 431         GdkColor color;
 432
 433         color.red = celltext->background.red;
 434         color.green = celltext->background.green;
 435         color.blue = celltext->background.blue;
 436
 437         g_value_set_boxed (value, &color);
 438       }
 439       break;
 440
 441     case PROP_FOREGROUND_GDK:
 442       {
 443         GdkColor color;
 444
 445         color.red = celltext->foreground.red;
 446         color.green = celltext->foreground.green;
 447         color.blue = celltext->foreground.blue;
 448
 449         g_value_set_boxed (value, &color);
 450       }
 451       break;
 452
 453     case PROP_FONT:
 454       {
 455         /* FIXME GValue imposes a totally gratuitous string copy
 456          * here, we could just hand off string ownership
 457          */
 458         gchar *str = pango_font_description_to_string (&celltext->font);
 459         g_value_set_string (value, str);
 460         g_free (str);
 461       }
 462       break;
 463
 464     case PROP_FONT_DESC:
 465       g_value_set_boxed (value, &celltext->font);
 466       break;
 467
 468     case PROP_FAMILY:
 469       g_value_set_string (value, celltext->font.family_name);
 470       break;
 471
 472     case PROP_STYLE:
 473       g_value_set_enum (value, celltext->font.style);
 474       break;
 475
 476     case PROP_VARIANT:
 477       g_value_set_enum (value, celltext->font.variant);
 478       break;
 479
 480     case PROP_WEIGHT:
 481       g_value_set_int (value, celltext->font.weight);
 482       break;
 483
 484     case PROP_STRETCH:
 485       g_value_set_enum (value, celltext->font.stretch);
 486       break;
 487
 488     case PROP_SIZE:
 489       g_value_set_int (value, celltext->font.size);
 490       break;
 491
 492     case PROP_SIZE_POINTS:
 493       g_value_set_double (value, ((double)celltext->font.size) / (double)PANGO_SCALE);
 494       break;
 495
 496     case PROP_SCALE:
 497       g_value_set_double (value, celltext->font_scale);
 498       break;
 499
 500     case PROP_EDITABLE:
 501       g_value_set_boolean (value, celltext->editable);
 502       break;
 503
 504     case PROP_STRIKETHROUGH:
 505       g_value_set_boolean (value, celltext->strikethrough);
 506       break;
 507
 508     case PROP_UNDERLINE:
 509       g_value_set_enum (value, celltext->underline_style);
 510       break;
 511
 512     case PROP_RISE:
 513       g_value_set_int (value, celltext->rise);
 514       break;
 515
 516     case PROP_BACKGROUND_SET:
 517       g_value_set_boolean (value, celltext->background_set);
 518       break;
 519
 520     case PROP_FOREGROUND_SET:
 521       g_value_set_boolean (value, celltext->foreground_set);
 522       break;
 523
 524     case PROP_FAMILY_SET:
 525       g_value_set_boolean (value, celltext->family_set);
 526       break;
 527
 528     case PROP_STYLE_SET:
 529       g_value_set_boolean (value, celltext->style_set);
 530       break;
 531
 532     case PROP_VARIANT_SET:
 533       g_value_set_boolean (value, celltext->variant_set);
 534       break;
 535
 536     case PROP_WEIGHT_SET:
 537       g_value_set_boolean (value, celltext->weight_set);
 538       break;
 539
 540     case PROP_STRETCH_SET:
 541       g_value_set_boolean (value, celltext->stretch_set);
 542       break;
 543
 544     case PROP_SIZE_SET:
 545       g_value_set_boolean (value, celltext->size_set);
 546       break;
 547
 548     case PROP_SCALE_SET:
 549       g_value_set_boolean (value, celltext->scale_set);
 550       break;
 551
 552     case PROP_EDITABLE_SET:
 553       g_value_set_boolean (value, celltext->editable_set);
 554       break;
 555
 556     case PROP_STRIKETHROUGH_SET:
 557       g_value_set_boolean (value, celltext->strikethrough_set);
 558       break;
 559
 560     case PROP_UNDERLINE_SET:
 561       g_value_set_boolean (value, celltext->underline_set);
 562       break;
 563
 564     case  PROP_RISE_SET:
 565       g_value_set_boolean (value, celltext->rise_set);
 566       break;
 567
 568     case PROP_BACKGROUND:
 569     case PROP_FOREGROUND:
 570     case PROP_MARKUP:
 571     default:
 572       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 573       break;
 574     }
 575 }
 576
 577
 578 static void
 579 set_bg_color (GtkCellRendererText *celltext,
 580               GdkColor            *color)
 581 {
 582   if (color)
 583     {
 584       if (!celltext->background_set)
 585         {
 586           celltext->background_set = TRUE;
 587           g_object_notify (G_OBJECT (celltext), "background_set");
 588         }
 589
 590       celltext->background.red = color->red;
 591       celltext->background.green = color->green;
 592       celltext->background.blue = color->blue;
 593     }
 594   else
 595     {
 596       if (celltext->background_set)
 597         {
 598           celltext->background_set = FALSE;
 599           g_object_notify (G_OBJECT (celltext), "background_set");
 600         }
 601     }
 602 }
 603
 604
 605 static void
 606 set_fg_color (GtkCellRendererText *celltext,
 607               GdkColor            *color)
 608 {
 609   if (color)
 610     {
 611       if (!celltext->foreground_set)
 612         {
 613           celltext->foreground_set = TRUE;
 614           g_object_notify (G_OBJECT (celltext), "foreground_set");
 615         }
 616
 617       celltext->foreground.red = color->red;
 618       celltext->foreground.green = color->green;
 619       celltext->foreground.blue = color->blue;
 620     }
 621   else
 622     {
 623       if (celltext->foreground_set)
 624         {
 625           celltext->foreground_set = FALSE;
 626           g_object_notify (G_OBJECT (celltext), "foreground_set");
 627         }
 628     }
 629 }
 630
 631 static void
 632 set_font_description (GtkCellRendererText  *celltext,
 633                       PangoFontDescription *font_desc)
 634 {
 635   if (font_desc != NULL)
 636     {
 637       /* pango_font_description_from_string() will sometimes return
 638        * a NULL family or -1 size, so handle those cases.
 639        */
 640
 641       if (font_desc->family_name)
 642         g_object_set (G_OBJECT (celltext),
 643                       "family", font_desc->family_name,
 644                       NULL);
 645
 646       if (font_desc->size >= 0)
 647         g_object_set (G_OBJECT (celltext),
 648                       "size", font_desc->size,
 649                       NULL);
 650
 651       g_object_set (G_OBJECT (celltext),
 652                     "style", font_desc->style,
 653                     "variant", font_desc->variant,
 654                     "weight", font_desc->weight,
 655                     "stretch", font_desc->stretch,
 656                     NULL);
 657     }
 658   else
 659     {
 660       if (celltext->family_set)
 661         {
 662           celltext->family_set = FALSE;
 663           g_object_notify (G_OBJECT (celltext), "family_set");
 664         }
 665       if (celltext->style_set)
 666         {
 667           celltext->style_set = FALSE;
 668           g_object_notify (G_OBJECT (celltext), "style_set");
 669         }
 670       if (celltext->variant_set)
 671         {
 672           celltext->variant_set = FALSE;
 673           g_object_notify (G_OBJECT (celltext), "variant_set");
 674         }
 675       if (celltext->weight_set)
 676         {
 677           celltext->weight_set = FALSE;
 678           g_object_notify (G_OBJECT (celltext), "weight_set");
 679         }
 680       if (celltext->stretch_set)
 681         {
 682           celltext->stretch_set = FALSE;
 683           g_object_notify (G_OBJECT (celltext), "stretch_set");
 684         }
 685       if (celltext->size_set)
 686         {
 687           celltext->size_set = FALSE;
 688           g_object_notify (G_OBJECT (celltext), "size_set");
 689         }
 690     }
 691 }
 692
 693 static void
 694 gtk_cell_renderer_text_set_property (GObject      *object,
 695                                      guint         param_id,
 696                                      const GValue *value,
 697                                      GParamSpec   *pspec)
 698 {
 699   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 700
 701   switch (param_id)
 702     {
 703     case PROP_TEXT:
 704       if (celltext->text)
 705         g_free (celltext->text);
 706       celltext->text = g_strdup (g_value_get_string (value));
 707       g_object_notify(G_OBJECT(object), "text");
 708       break;
 709
 710     case PROP_ATTRIBUTES:
 711       if (celltext->extra_attrs)
 712         pango_attr_list_unref (celltext->extra_attrs);
 713
 714       celltext->extra_attrs = g_value_get_boxed (value);
 715       pango_attr_list_ref (celltext->extra_attrs);
 716       break;
 717     case PROP_MARKUP:
 718       {
 719         const gchar *str;
 720         gchar *text = NULL;
 721         GError *error = NULL;
 722         PangoAttrList *attrs = NULL;
 723
 724         if (celltext->text)
 725           g_free (celltext->text);
 726
 727         if (celltext->extra_attrs)
 728           pango_attr_list_unref (celltext->extra_attrs);
 729
 730         str = g_value_get_string (value);
 731         if (str && !pango_parse_markup (str,
 732                                         -1,
 733                                         0,
 734                                         &attrs,
 735                                         &text,
 736                                         NULL,
 737                                         &error))
 738           {
 739             g_warning ("Failed to set cell text from markup due to error parsing markup: %s",
 740                        error->message);
 741             g_error_free (error);
 742             return;
 743           }
 744
 745         celltext->text = text;
 746         celltext->extra_attrs = attrs;
 747       }
 748       break;
 749
 750     case PROP_BACKGROUND:
 751       {
 752         GdkColor color;
 753
 754         if (!g_value_get_string (value))
 755           set_bg_color (celltext, NULL);       /* reset to backgrounmd_set to FALSE */
 756         else if (gdk_color_parse (g_value_get_string (value), &color))
 757           set_bg_color (celltext, &color);
 758         else
 759           g_warning ("Don't know color `%s'", g_value_get_string (value));
 760
 761         g_object_notify (G_OBJECT (celltext), "background_gdk");
 762       }
 763       break;
 764
 765     case PROP_FOREGROUND:
 766       {
 767         GdkColor color;
 768
 769         if (!g_value_get_string (value))
 770           set_fg_color (celltext, NULL);       /* reset to foreground_set to FALSE */
 771         else if (gdk_color_parse (g_value_get_string (value), &color))
 772           set_fg_color (celltext, &color);
 773         else
 774           g_warning ("Don't know color `%s'", g_value_get_string (value));
 775
 776         g_object_notify (G_OBJECT (celltext), "foreground_gdk");
 777       }
 778       break;
 779
 780     case PROP_BACKGROUND_GDK:
 781       /* This notifies the GObject itself. */
 782       set_bg_color (celltext, g_value_get_boxed (value));
 783       break;
 784
 785     case PROP_FOREGROUND_GDK:
 786       /* This notifies the GObject itself. */
 787       set_fg_color (celltext, g_value_get_boxed (value));
 788       break;
 789
 790     case PROP_FONT:
 791       {
 792         PangoFontDescription *font_desc = NULL;
 793         const gchar *name;
 794
 795         name = g_value_get_string (value);
 796
 797         if (name)
 798           font_desc = pango_font_description_from_string (name);
 799
 800         /* This function notifies the relevant GObjects itself.
 801          * I'm not sure how useful the notify() on 'font'
 802          * actually is here, but it's here for consistency.
 803          */
 804         set_font_description (celltext, font_desc);
 805         g_object_notify(G_OBJECT(object), "font_desc");
 806         g_object_notify(G_OBJECT(object), "font");
 807
 808         if (font_desc)
 809           pango_font_description_free (font_desc);
 810         if (celltext->fixed_height_rows != -1)
 811           celltext->calc_fixed_height = TRUE;
 812       }
 813       break;
 814
 815     case PROP_FONT_DESC:
 816       set_font_description (celltext, g_value_get_boxed (value));
 817       if (celltext->fixed_height_rows != -1)
 818         celltext->calc_fixed_height = TRUE;
 819       break;
 820
 821     case PROP_FAMILY:
 822       if (celltext->font.family_name)
 823         g_free (celltext->font.family_name);
 824       celltext->font.family_name = g_strdup (g_value_get_string (value));
 825
 826       celltext->family_set = TRUE;
 827       g_object_notify (G_OBJECT (celltext), "family_set");
 828       g_object_notify (G_OBJECT (celltext), "font_desc");
 829       g_object_notify (G_OBJECT (celltext), "font");
 830       if (celltext->fixed_height_rows != -1)
 831         celltext->calc_fixed_height = TRUE;
 832       break;
 833
 834     case PROP_STYLE:
 835       celltext->font.style = g_value_get_enum (value);
 836
 837       celltext->style_set = TRUE;
 838       g_object_notify (G_OBJECT (celltext), "style_set");
 839       g_object_notify (G_OBJECT (celltext), "font_desc");
 840       g_object_notify (G_OBJECT (celltext), "font");
 841       if (celltext->fixed_height_rows != -1)
 842         celltext->calc_fixed_height = TRUE;
 843       break;
 844
 845     case PROP_VARIANT:
 846       celltext->font.variant = g_value_get_enum (value);
 847
 848       celltext->variant_set = TRUE;
 849       g_object_notify (G_OBJECT (celltext), "variant_set");
 850       g_object_notify (G_OBJECT (celltext), "font_desc");
 851       g_object_notify (G_OBJECT (celltext), "font");
 852       if (celltext->fixed_height_rows != -1)
 853         celltext->calc_fixed_height = TRUE;
 854       break;
 855
 856     case PROP_WEIGHT:
 857       celltext->font.weight = g_value_get_int (value);
 858
 859       celltext->weight_set = TRUE;
 860       g_object_notify (G_OBJECT (celltext), "weight_set");
 861       g_object_notify (G_OBJECT (celltext), "font_desc");
 862       g_object_notify (G_OBJECT (celltext), "font");
 863       if (celltext->fixed_height_rows != -1)
 864         celltext->calc_fixed_height = TRUE;
 865       break;
 866
 867     case PROP_STRETCH:
 868       celltext->font.stretch = g_value_get_enum (value);
 869
 870       celltext->stretch_set = TRUE;
 871       g_object_notify (G_OBJECT (celltext), "stretch_set");
 872       g_object_notify (G_OBJECT (celltext), "font_desc");
 873       g_object_notify (G_OBJECT (celltext), "font");
 874       if (celltext->fixed_height_rows != -1)
 875         celltext->calc_fixed_height = TRUE;
 876       break;
 877
 878     case PROP_SIZE:
 879       celltext->font.size = g_value_get_int (value);
 880
 881       celltext->size_set = TRUE;
 882       g_object_notify (G_OBJECT (celltext), "size_set");
 883       g_object_notify (G_OBJECT (celltext), "font_desc");
 884       g_object_notify (G_OBJECT (celltext), "font");
 885       if (celltext->fixed_height_rows != -1)
 886         celltext->calc_fixed_height = TRUE;
 887       break;
 888
 889     case PROP_SCALE:
 890       celltext->font_scale = g_value_get_double (value);
 891       celltext->scale_set = TRUE;
 892       if (celltext->fixed_height_rows != -1)
 893         celltext->calc_fixed_height = TRUE;
 894       break;
 895
 896     case PROP_SIZE_POINTS:
 897       celltext->font.size = g_value_get_double (value) * PANGO_SCALE;
 898
 899       celltext->size_set = TRUE;
 900       g_object_notify (G_OBJECT (celltext), "size_set");
 901       g_object_notify (G_OBJECT (celltext), "font_desc");
 902       g_object_notify (G_OBJECT (celltext), "font");
 903       if (celltext->fixed_height_rows != -1)
 904         celltext->calc_fixed_height = TRUE;
 905       break;
 906
 907     case PROP_EDITABLE:
 908       celltext->editable = g_value_get_boolean (value);
 909       celltext->editable_set = TRUE;
 910       g_object_notify (G_OBJECT (celltext), "editable_set");
 911       break;
 912
 913     case PROP_STRIKETHROUGH:
 914       celltext->strikethrough = g_value_get_boolean (value);
 915       celltext->strikethrough_set = TRUE;
 916       g_object_notify (G_OBJECT (celltext), "strikethrough_set");
 917       break;
 918
 919     case PROP_UNDERLINE:
 920       celltext->underline_style = g_value_get_enum (value);
 921       celltext->underline_set = TRUE;
 922       g_object_notify (G_OBJECT (celltext), "underline_set");
 923
 924       break;
 925
 926     case PROP_RISE:
 927       celltext->rise = g_value_get_int (value);
 928       celltext->rise_set = TRUE;
 929       g_object_notify (G_OBJECT (celltext), "rise_set");
 930       if (celltext->fixed_height_rows != -1)
 931         celltext->calc_fixed_height = TRUE;
 932       break;
 933
 934     case PROP_BACKGROUND_SET:
 935       celltext->background_set = g_value_get_boolean (value);
 936       break;
 937
 938     case PROP_FOREGROUND_SET:
 939       celltext->foreground_set = g_value_get_boolean (value);
 940       break;
 941
 942     case PROP_FAMILY_SET:
 943       celltext->family_set = g_value_get_boolean (value);
 944       break;
 945
 946     case PROP_STYLE_SET:
 947       celltext->style_set = g_value_get_boolean (value);
 948       break;
 949
 950     case PROP_VARIANT_SET:
 951       celltext->variant_set = g_value_get_boolean (value);
 952       break;
 953
 954     case PROP_WEIGHT_SET:
 955       celltext->weight_set = g_value_get_boolean (value);
 956       break;
 957
 958     case PROP_STRETCH_SET:
 959       celltext->stretch_set = g_value_get_boolean (value);
 960       break;
 961
 962     case PROP_SIZE_SET:
 963       celltext->size_set = g_value_get_boolean (value);
 964       break;
 965
 966     case PROP_SCALE_SET:
 967       celltext->scale_set = g_value_get_boolean (value);
 968       break;
 969
 970     case PROP_EDITABLE_SET:
 971       celltext->editable_set = g_value_get_boolean (value);
 972       break;
 973
 974     case PROP_STRIKETHROUGH_SET:
 975       celltext->strikethrough_set = g_value_get_boolean (value);
 976       break;
 977
 978     case PROP_UNDERLINE_SET:
 979       celltext->underline_set = g_value_get_boolean (value);
 980       break;
 981
 982     case PROP_RISE_SET:
 983       celltext->rise_set = g_value_get_boolean (value);
 984       break;
 985
 986     default:
 987       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 988       break;
 989     }
 990 }
 991
 992 /**
 993  * gtk_cell_renderer_text_new:
 994  *
 995  * Creates a new #GtkCellRendererText. Adjust how text is drawn using
 996  * object properties. Object properties can be
 997  * set globally (with g_object_set()). Also, with #GtkTreeViewColumn,
 998  * you can bind a property to a value in a #GtkTreeModel. For example,
 999  * you can bind the "text" property on the cell renderer to a string
1000  * value in the model, thus rendering a different string in each row
1001  * of the #GtkTreeView
1002  *
1003  * Return value: the new cell renderer
1004  **/
1005 GtkCellRenderer *
1006 gtk_cell_renderer_text_new (void)
1007 {
1008   return GTK_CELL_RENDERER (g_object_new (gtk_cell_renderer_text_get_type (), NULL));
1009 }
1010
1011 static void
1012 add_attr (PangoAttrList  *attr_list,
1013           PangoAttribute *attr)
1014 {
1015   attr->start_index = 0;
1016   attr->end_index = G_MAXINT;
1017
1018   pango_attr_list_insert (attr_list, attr);
1019 }
1020
1021 static PangoLayout*
1022 get_layout (GtkCellRendererText *celltext,
1023             GtkWidget           *widget,
1024             gboolean             will_render,
1025             GtkCellRendererState flags)
1026 {
1027   PangoAttrList *attr_list;
1028   PangoLayout *layout;
1029   PangoUnderline uline;
1030
1031   layout = gtk_widget_create_pango_layout (widget, celltext->text);
1032
1033   if (celltext->extra_attrs)
1034     attr_list = pango_attr_list_copy (celltext->extra_attrs);
1035   else
1036     attr_list = pango_attr_list_new ();
1037
1038   if (will_render)
1039     {
1040       /* Add options that affect appearance but not size */
1041
1042       /* note that background doesn't go here, since it affects
1043        * background_area not the PangoLayout area
1044        */
1045
1046       if (celltext->foreground_set)
1047         {
1048           PangoColor color;
1049
1050           color = celltext->foreground;
1051
1052           add_attr (attr_list,
1053                     pango_attr_foreground_new (color.red, color.green, color.blue));
1054         }
1055
1056       if (celltext->strikethrough_set)
1057         add_attr (attr_list,
1058                   pango_attr_strikethrough_new (celltext->strikethrough));
1059     }
1060
1061   if (celltext->family_set &&
1062       celltext->font.family_name)
1063     add_attr (attr_list, pango_attr_family_new (celltext->font.family_name));
1064
1065   if (celltext->style_set)
1066     add_attr (attr_list, pango_attr_style_new (celltext->font.style));
1067
1068   if (celltext->variant_set)
1069     add_attr (attr_list, pango_attr_variant_new (celltext->font.variant));
1070
1071   if (celltext->weight_set)
1072     add_attr (attr_list, pango_attr_weight_new (celltext->font.weight));
1073
1074   if (celltext->stretch_set)
1075     add_attr (attr_list, pango_attr_stretch_new (celltext->font.stretch));
1076
1077   if (celltext->size_set &&
1078       celltext->font.size >= 0)
1079     add_attr (attr_list, pango_attr_size_new (celltext->font.size));
1080
1081   if (celltext->scale_set &&
1082       celltext->font_scale != 1.0)
1083     add_attr (attr_list, pango_attr_scale_new (celltext->font_scale));
1084
1085   if (celltext->underline_set)
1086     uline = celltext->underline_style;
1087   else
1088     uline = PANGO_UNDERLINE_NONE;
1089
1090   if ((flags & GTK_CELL_RENDERER_PRELIT) == GTK_CELL_RENDERER_PRELIT)
1091     {
1092       switch (uline)
1093         {
1094         case PANGO_UNDERLINE_NONE:
1095           uline = PANGO_UNDERLINE_SINGLE;
1096           break;
1097
1098         case PANGO_UNDERLINE_SINGLE:
1099           uline = PANGO_UNDERLINE_DOUBLE;
1100           break;
1101
1102         default:
1103           break;
1104         }
1105     }
1106
1107   if (uline != PANGO_UNDERLINE_NONE)
1108     add_attr (attr_list, pango_attr_underline_new (celltext->underline_style));
1109
1110   if (celltext->rise_set)
1111     add_attr (attr_list, pango_attr_rise_new (celltext->rise));
1112
1113   pango_layout_set_attributes (layout, attr_list);
1114   pango_layout_set_width (layout, -1);
1115
1116   pango_attr_list_unref (attr_list);
1117
1118   return layout;
1119 }
1120
1121 static void
1122 gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
1123                                  GtkWidget       *widget,
1124                                  GdkRectangle    *cell_area,
1125                                  gint            *x_offset,
1126                                  gint            *y_offset,
1127                                  gint            *width,
1128                                  gint            *height)
1129 {
1130   GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
1131   PangoRectangle rect;
1132   PangoLayout *layout;
1133
1134   if (celltext->calc_fixed_height)
1135     {
1136       PangoContext *context;
1137       PangoFontMetrics metrics;
1138       PangoFontDescription font_desc;
1139
1140       font_desc = (* widget->style->font_desc);
1141
1142       if (celltext->family_set &&
1143           celltext->font.family_name)
1144         font_desc.family_name = celltext->font.family_name;
1145       if (celltext->style_set)
1146         font_desc.style = celltext->font.style;
1147
1148       if (celltext->variant_set)
1149         font_desc.variant = celltext->font.variant;
1150
1151       if (celltext->weight_set)
1152         font_desc.weight = celltext->font.weight;
1153
1154       if (celltext->stretch_set)
1155         font_desc.stretch = celltext->font.stretch;
1156
1157       if (celltext->size_set &&
1158           celltext->font.size >= 0)
1159         font_desc.size = celltext->font.size;
1160
1161       context = gtk_widget_get_pango_context (widget);
1162       pango_context_get_metrics (context,
1163                                  &font_desc,
1164                                  pango_context_get_language (context),
1165                                  &metrics);
1166       gtk_cell_renderer_set_fixed_size (cell,
1167                                         cell->width, 2*cell->ypad +
1168                                         celltext->fixed_height_rows*(metrics.ascent + metrics.descent)/PANGO_SCALE);
1169       if (height)
1170         {
1171           *height = cell->height;
1172           height = NULL;
1173         }
1174       celltext->calc_fixed_height = FALSE;
1175       if (width == NULL)
1176         return;
1177     }
1178   layout = get_layout (celltext, widget, FALSE, 0);
1179   pango_layout_get_pixel_extents (layout, NULL, &rect);
1180
1181   if (width)
1182     *width = GTK_CELL_RENDERER (celltext)->xpad * 2 + rect.width;
1183
1184   if (height)
1185     *height = GTK_CELL_RENDERER (celltext)->ypad * 2 + rect.height;
1186
1187   if (cell_area)
1188     {
1189       if (x_offset)
1190         {
1191           *x_offset = cell->xalign * (cell_area->width - rect.width - (2 * cell->xpad));
1192           *x_offset = MAX (*x_offset, 0) + cell->xpad;
1193         }
1194       if (y_offset)
1195         {
1196           *y_offset = cell->yalign * (cell_area->height - rect.height - (2 * cell->ypad));
1197           *y_offset = MAX (*y_offset, 0) + cell->ypad;
1198         }
1199     }
1200
1201   g_object_unref (G_OBJECT (layout));
1202 }
1203
1204 static void
1205 gtk_cell_renderer_text_render (GtkCellRenderer    *cell,
1206                                GdkWindow          *window,
1207                                GtkWidget          *widget,
1208                                GdkRectangle       *background_area,
1209                                GdkRectangle       *cell_area,
1210                                GdkRectangle       *expose_area,
1211                                guint               flags)
1212
1213 {
1214   GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
1215   PangoLayout *layout;
1216   GtkStateType state;
1217   gint x_offset;
1218   gint y_offset;
1219
1220   layout = get_layout (celltext, widget, TRUE, flags);
1221
1222   gtk_cell_renderer_text_get_size (cell, widget, cell_area, &x_offset, &y_offset, NULL, NULL);
1223
1224   if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
1225     state = GTK_STATE_SELECTED;
1226   else
1227     state = GTK_STATE_NORMAL;
1228
1229   if (celltext->background_set && state != GTK_STATE_SELECTED)
1230     {
1231       GdkColor color;
1232       GdkGC *gc;
1233
1234       color.red = celltext->background.red;
1235       color.green = celltext->background.green;
1236       color.blue = celltext->background.blue;
1237
1238       gc = gdk_gc_new (window);
1239
1240       gdk_gc_set_rgb_fg_color (gc, &color);
1241
1242       gdk_draw_rectangle (window,
1243                           gc,
1244                           TRUE,
1245                           background_area->x,
1246                           background_area->y,
1247                           background_area->width,
1248                           background_area->height);
1249
1250       g_object_unref (G_OBJECT (gc));
1251     }
1252
1253   gtk_paint_layout (widget->style,
1254                     window,
1255                     state,
1256                     TRUE,
1257                     cell_area,
1258                     widget,
1259                     "cellrenderertext",
1260                     cell_area->x + x_offset,
1261                     cell_area->y + y_offset,
1262                     layout);
1263
1264   g_object_unref (G_OBJECT (layout));
1265 }
1266
1267 /**
1268  * gtk_cell_renderer_text_set_fixed_height_from_font:
1269  * @renderer: A #GtkCellRendererText
1270  * @number_of_rows: Number of rows of text each cell renderer is allocated, or -1
1271  *
1272  * Sets the height of a renderer to explicitly be determined by the "font" and
1273  * "y_pad" property set on it.  Further changes in these properties do not
1274  * affect the height, so they must be accompanied by a subsequent call to this
1275  * function.  Using this function is unflexible, and should really only be used
1276  * if calculating the size of a cell is too slow.  If @no_rows is -1, then the
1277  * fixed height is unset, and the height is determined by the properties again.
1278  **/
1279 void
1280 gtk_cell_renderer_text_set_fixed_height_from_font (GtkCellRendererText *renderer,
1281                                                    gint                 number_of_rows)
1282 {
1283   g_return_if_fail (GTK_IS_CELL_RENDERER_TEXT (renderer));
1284   g_return_if_fail (number_of_rows == -1 || number_of_rows > 0);
1285
1286   if (number_of_rows == -1)
1287     {
1288       gtk_cell_renderer_set_fixed_size (GTK_CELL_RENDERER (renderer),
1289                                         GTK_CELL_RENDERER (renderer)->width,
1290                                         -1);
1291     }
1292   else
1293     {
1294       renderer->fixed_height_rows = number_of_rows;
1295       renderer->calc_fixed_height = TRUE;
1296     }
1297 }