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 "gtkeditable.h"
  23 #include "gtkentry.h"
  24 #include "gtksignal.h"
  25 #include "gtkintl.h"
  26
  27 static void gtk_cell_renderer_text_init       (GtkCellRendererText      *celltext);
  28 static void gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class);
  29 static void gtk_cell_renderer_text_finalize   (GObject                  *object);
  30
  31 static void gtk_cell_renderer_text_get_property  (GObject                  *object,
  32                                                   guint                     param_id,
  33                                                   GValue                   *value,
  34                                                   GParamSpec               *pspec);
  35 static void gtk_cell_renderer_text_set_property  (GObject                  *object,
  36                                                   guint                     param_id,
  37                                                   const GValue             *value,
  38                                                   GParamSpec               *pspec);
  39 static void gtk_cell_renderer_text_get_size   (GtkCellRenderer          *cell,
  40                                                GtkWidget                *widget,
  41                                                GdkRectangle             *cell_area,
  42                                                gint                     *x_offset,
  43                                                gint                     *y_offset,
  44                                                gint                     *width,
  45                                                gint                     *height);
  46 static void gtk_cell_renderer_text_render     (GtkCellRenderer          *cell,
  47                                                GdkWindow                *window,
  48                                                GtkWidget                *widget,
  49                                                GdkRectangle             *background_area,
  50                                                GdkRectangle             *cell_area,
  51                                                GdkRectangle             *expose_area,
  52                                                guint                     flags);
  53
  54 static GtkCellEditable *gtk_cell_renderer_text_start_editing (GtkCellRenderer      *cell,
  55                                                               GdkEvent             *event,
  56                                                               GtkWidget            *widget,
  57                                                               gchar                *path,
  58                                                               GdkRectangle         *background_area,
  59                                                               GdkRectangle         *cell_area,
  60                                                               GtkCellRendererState  flags);
  61
  62 enum {
  63   EDITED,
  64   LAST_SIGNAL
  65 };
  66
  67 enum {
  68   PROP_0,
  69
  70   PROP_TEXT,
  71   PROP_MARKUP,
  72   PROP_ATTRIBUTES,
  73
  74   /* Style args */
  75   PROP_BACKGROUND,
  76   PROP_FOREGROUND,
  77   PROP_BACKGROUND_GDK,
  78   PROP_FOREGROUND_GDK,
  79   PROP_FONT,
  80   PROP_FONT_DESC,
  81   PROP_FAMILY,
  82   PROP_STYLE,
  83   PROP_VARIANT,
  84   PROP_WEIGHT,
  85   PROP_STRETCH,
  86   PROP_SIZE,
  87   PROP_SIZE_POINTS,
  88   PROP_SCALE,
  89   PROP_EDITABLE,
  90   PROP_STRIKETHROUGH,
  91   PROP_UNDERLINE,
  92   PROP_RISE,
  93
  94   /* Whether-a-style-arg-is-set args */
  95   PROP_BACKGROUND_SET,
  96   PROP_FOREGROUND_SET,
  97   PROP_FAMILY_SET,
  98   PROP_STYLE_SET,
  99   PROP_VARIANT_SET,
 100   PROP_WEIGHT_SET,
 101   PROP_STRETCH_SET,
 102   PROP_SIZE_SET,
 103   PROP_SCALE_SET,
 104   PROP_EDITABLE_SET,
 105   PROP_STRIKETHROUGH_SET,
 106   PROP_UNDERLINE_SET,
 107   PROP_RISE_SET
 108 };
 109
 110 static gpointer parent_class;
 111 static guint text_cell_renderer_signals [LAST_SIGNAL];
 112
 113 #define GTK_CELL_RENDERER_TEXT_PATH "gtk-cell-renderer-text-path"
 114
 115 GtkType
 116 gtk_cell_renderer_text_get_type (void)
 117 {
 118   static GtkType cell_text_type = 0;
 119
 120   if (!cell_text_type)
 121     {
 122       static const GTypeInfo cell_text_info =
 123       {
 124         sizeof (GtkCellRendererTextClass),
 125         NULL,           /* base_init */
 126         NULL,           /* base_finalize */
 127         (GClassInitFunc) gtk_cell_renderer_text_class_init,
 128         NULL,           /* class_finalize */
 129         NULL,           /* class_data */
 130         sizeof (GtkCellRendererText),
 131         0,              /* n_preallocs */
 132         (GInstanceInitFunc) gtk_cell_renderer_text_init,
 133       };
 134
 135       cell_text_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererText", &cell_text_info, 0);
 136     }
 137
 138   return cell_text_type;
 139 }
 140
 141 static void
 142 gtk_cell_renderer_text_init (GtkCellRendererText *celltext)
 143 {
 144   GTK_CELL_RENDERER (celltext)->xalign = 0.0;
 145   GTK_CELL_RENDERER (celltext)->yalign = 0.5;
 146   GTK_CELL_RENDERER (celltext)->xpad = 2;
 147   GTK_CELL_RENDERER (celltext)->ypad = 2;
 148   GTK_CELL_RENDERER (celltext)->mode = GTK_CELL_RENDERER_MODE_EDITABLE;
 149   celltext->fixed_height_rows = -1;
 150   celltext->font = pango_font_description_new ();
 151 }
 152
 153 static void
 154 gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
 155 {
 156   GObjectClass *object_class = G_OBJECT_CLASS (class);
 157   GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
 158
 159   parent_class = g_type_class_peek_parent (class);
 160
 161   object_class->finalize = gtk_cell_renderer_text_finalize;
 162
 163   object_class->get_property = gtk_cell_renderer_text_get_property;
 164   object_class->set_property = gtk_cell_renderer_text_set_property;
 165
 166   cell_class->get_size = gtk_cell_renderer_text_get_size;
 167   cell_class->render = gtk_cell_renderer_text_render;
 168   cell_class->start_editing = gtk_cell_renderer_text_start_editing;
 169
 170   g_object_class_install_property (object_class,
 171                                    PROP_TEXT,
 172                                    g_param_spec_string ("text",
 173                                                         _("Text"),
 174                                                         _("Text to render"),
 175                                                         NULL,
 176                                                         G_PARAM_READWRITE));
 177
 178   g_object_class_install_property (object_class,
 179                                    PROP_MARKUP,
 180                                    g_param_spec_string ("markup",
 181                                                         _("Markup"),
 182                                                         _("Marked up text to render"),
 183                                                         NULL,
 184                                                         G_PARAM_WRITABLE));
 185
 186   g_object_class_install_property (object_class,
 187                                    PROP_ATTRIBUTES,
 188                                    g_param_spec_boxed ("attributes",
 189                                                        _("Attributes"),
 190                                                        _("A list of style attributes to apply to the text of the renderer."),
 191                                                        PANGO_TYPE_ATTR_LIST,
 192                                                        G_PARAM_READWRITE));
 193
 194   g_object_class_install_property (object_class,
 195                                    PROP_BACKGROUND,
 196                                    g_param_spec_string ("background",
 197                                                         _("Background color name"),
 198                                                         _("Background color as a string"),
 199                                                         NULL,
 200                                                         G_PARAM_WRITABLE));
 201
 202   g_object_class_install_property (object_class,
 203                                    PROP_BACKGROUND_GDK,
 204                                    g_param_spec_boxed ("background_gdk",
 205                                                        _("Background color"),
 206                                                        _("Background color as a GdkColor"),
 207                                                        GDK_TYPE_COLOR,
 208                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 209
 210   g_object_class_install_property (object_class,
 211                                    PROP_FOREGROUND,
 212                                    g_param_spec_string ("foreground",
 213                                                         _("Foreground color name"),
 214                                                         _("Foreground color as a string"),
 215                                                         NULL,
 216                                                         G_PARAM_WRITABLE));
 217
 218   g_object_class_install_property (object_class,
 219                                    PROP_FOREGROUND_GDK,
 220                                    g_param_spec_boxed ("foreground_gdk",
 221                                                        _("Foreground color"),
 222                                                        _("Foreground color as a GdkColor"),
 223                                                        GDK_TYPE_COLOR,
 224                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 225
 226
 227   g_object_class_install_property (object_class,
 228                                    PROP_EDITABLE,
 229                                    g_param_spec_boolean ("editable",
 230                                                          _("Editable"),
 231                                                          _("Whether the text can be modified by the user"),
 232                                                          TRUE,
 233                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 234
 235   g_object_class_install_property (object_class,
 236                                    PROP_FONT,
 237                                    g_param_spec_string ("font",
 238                                                         _("Font"),
 239                                                         _("Font description as a string"),
 240                                                         NULL,
 241                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 242
 243   g_object_class_install_property (object_class,
 244                                    PROP_FONT_DESC,
 245                                    g_param_spec_boxed ("font_desc",
 246                                                        _("Font"),
 247                                                        _("Font description as a PangoFontDescription struct"),
 248                                                        PANGO_TYPE_FONT_DESCRIPTION,
 249                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 250
 251
 252   g_object_class_install_property (object_class,
 253                                    PROP_FAMILY,
 254                                    g_param_spec_string ("family",
 255                                                         _("Font family"),
 256                                                         _("Name of the font family, e.g. Sans, Helvetica, Times, Monospace"),
 257                                                         NULL,
 258                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 259
 260   g_object_class_install_property (object_class,
 261                                    PROP_STYLE,
 262                                    g_param_spec_enum ("style",
 263                                                       _("Font style"),
 264                                                       _("Font style"),
 265                                                       PANGO_TYPE_STYLE,
 266                                                       PANGO_STYLE_NORMAL,
 267                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 268
 269   g_object_class_install_property (object_class,
 270                                    PROP_VARIANT,
 271                                    g_param_spec_enum ("variant",
 272                                                      _("Font variant"),
 273                                                      _("Font variant"),
 274                                                       PANGO_TYPE_VARIANT,
 275                                                       PANGO_VARIANT_NORMAL,
 276                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 277
 278   g_object_class_install_property (object_class,
 279                                    PROP_WEIGHT,
 280                                    g_param_spec_int ("weight",
 281                                                      _("Font weight"),
 282                                                      _("Font weight"),
 283                                                      0,
 284                                                      G_MAXINT,
 285                                                      PANGO_WEIGHT_NORMAL,
 286                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 287
 288
 289   g_object_class_install_property (object_class,
 290                                    PROP_STRETCH,
 291                                    g_param_spec_enum ("stretch",
 292                                                       _("Font stretch"),
 293                                                       _("Font stretch"),
 294                                                       PANGO_TYPE_STRETCH,
 295                                                       PANGO_STRETCH_NORMAL,
 296                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 297
 298   g_object_class_install_property (object_class,
 299                                    PROP_SIZE,
 300                                    g_param_spec_int ("size",
 301                                                      _("Font size"),
 302                                                      _("Font size"),
 303                                                      0,
 304                                                      G_MAXINT,
 305                                                      0,
 306                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 307
 308   g_object_class_install_property (object_class,
 309                                    PROP_SIZE_POINTS,
 310                                    g_param_spec_double ("size_points",
 311                                                         _("Font points"),
 312                                                         _("Font size in points"),
 313                                                         0.0,
 314                                                         G_MAXDOUBLE,
 315                                                         0.0,
 316                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 317
 318   g_object_class_install_property (object_class,
 319                                    PROP_SCALE,
 320                                    g_param_spec_double ("scale",
 321                                                         _("Font scale"),
 322                                                         _("Font scaling factor"),
 323                                                         0.0,
 324                                                         G_MAXDOUBLE,
 325                                                         1.0,
 326                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 327
 328   g_object_class_install_property (object_class,
 329                                    PROP_RISE,
 330                                    g_param_spec_int ("rise",
 331                                                      _("Rise"),
 332                                                      _("Offset of text above the baseline (below the baseline if rise is negative)"),
 333                                                      -G_MAXINT,
 334                                                      G_MAXINT,
 335                                                      0,
 336                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 337
 338
 339   g_object_class_install_property (object_class,
 340                                    PROP_STRIKETHROUGH,
 341                                    g_param_spec_boolean ("strikethrough",
 342                                                          _("Strikethrough"),
 343                                                          _("Whether to strike through the text"),
 344                                                          FALSE,
 345                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 346
 347   g_object_class_install_property (object_class,
 348                                    PROP_UNDERLINE,
 349                                    g_param_spec_enum ("underline",
 350                                                       _("Underline"),
 351                                                       _("Style of underline for this text"),
 352                                                       PANGO_TYPE_UNDERLINE,
 353                                                       PANGO_UNDERLINE_NONE,
 354                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 355
 356   /* Style props are set or not */
 357
 358 #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))
 359
 360   ADD_SET_PROP ("background_set", PROP_BACKGROUND_SET,
 361                 _("Background set"),
 362                 _("Whether this tag affects the background color"));
 363
 364   ADD_SET_PROP ("foreground_set", PROP_FOREGROUND_SET,
 365                 _("Foreground set"),
 366                 _("Whether this tag affects the foreground color"));
 367
 368   ADD_SET_PROP ("editable_set", PROP_EDITABLE_SET,
 369                 _("Editability set"),
 370                 _("Whether this tag affects text editability"));
 371
 372   ADD_SET_PROP ("family_set", PROP_FAMILY_SET,
 373                 _("Font family set"),
 374                 _("Whether this tag affects the font family"));
 375
 376   ADD_SET_PROP ("style_set", PROP_STYLE_SET,
 377                 _("Font style set"),
 378                 _("Whether this tag affects the font style"));
 379
 380   ADD_SET_PROP ("variant_set", PROP_VARIANT_SET,
 381                 _("Font variant set"),
 382                 _("Whether this tag affects the font variant"));
 383
 384   ADD_SET_PROP ("weight_set", PROP_WEIGHT_SET,
 385                 _("Font weight set"),
 386                 _("Whether this tag affects the font weight"));
 387
 388   ADD_SET_PROP ("stretch_set", PROP_STRETCH_SET,
 389                 _("Font stretch set"),
 390                 _("Whether this tag affects the font stretch"));
 391
 392   ADD_SET_PROP ("size_set", PROP_SIZE_SET,
 393                 _("Font size set"),
 394                 _("Whether this tag affects the font size"));
 395
 396   ADD_SET_PROP ("scale_set", PROP_SCALE_SET,
 397                 _("Font scale set"),
 398                 _("Whether this tag scales the font size by a factor"));
 399
 400   ADD_SET_PROP ("rise_set", PROP_RISE_SET,
 401                 _("Rise set"),
 402                 _("Whether this tag affects the rise"));
 403
 404   ADD_SET_PROP ("strikethrough_set", PROP_STRIKETHROUGH_SET,
 405                 _("Strikethrough set"),
 406                 _("Whether this tag affects strikethrough"));
 407
 408   ADD_SET_PROP ("underline_set", PROP_UNDERLINE_SET,
 409                 _("Underline set"),
 410                 _("Whether this tag affects underlining"));
 411
 412   text_cell_renderer_signals [EDITED] =
 413     gtk_signal_new ("edited",
 414                     GTK_RUN_LAST,
 415                     GTK_CLASS_TYPE (object_class),
 416                     GTK_SIGNAL_OFFSET (GtkCellRendererTextClass, edited),
 417                     gtk_marshal_VOID__STRING_STRING,
 418                     GTK_TYPE_NONE, 2,
 419                     G_TYPE_STRING,
 420                     G_TYPE_STRING);
 421
 422 }
 423
 424 static void
 425 gtk_cell_renderer_text_finalize (GObject *object)
 426 {
 427   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 428
 429   pango_font_description_free (celltext->font);
 430
 431   if (celltext->text)
 432     g_free (celltext->text);
 433
 434   if (celltext->extra_attrs)
 435     pango_attr_list_unref (celltext->extra_attrs);
 436
 437   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
 438 }
 439
 440 static PangoFontMask
 441 get_property_font_set_mask (guint prop_id)
 442 {
 443   switch (prop_id)
 444     {
 445     case PROP_FAMILY_SET:
 446       return PANGO_FONT_MASK_FAMILY;
 447     case PROP_STYLE_SET:
 448       return PANGO_FONT_MASK_STYLE;
 449     case PROP_VARIANT_SET:
 450       return PANGO_FONT_MASK_VARIANT;
 451     case PROP_WEIGHT_SET:
 452       return PANGO_FONT_MASK_WEIGHT;
 453     case PROP_STRETCH_SET:
 454       return PANGO_FONT_MASK_STRETCH;
 455     case PROP_SIZE_SET:
 456       return PANGO_FONT_MASK_SIZE;
 457     }
 458
 459   return 0;
 460 }
 461
 462 static void
 463 gtk_cell_renderer_text_get_property (GObject        *object,
 464                                      guint           param_id,
 465                                      GValue         *value,
 466                                      GParamSpec     *pspec)
 467 {
 468   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 469
 470   switch (param_id)
 471     {
 472     case PROP_TEXT:
 473       g_value_set_string (value, celltext->text);
 474       break;
 475
 476     case PROP_ATTRIBUTES:
 477       g_value_set_boxed (value, celltext->extra_attrs);
 478       break;
 479
 480     case PROP_BACKGROUND_GDK:
 481       {
 482         GdkColor color;
 483
 484         color.red = celltext->background.red;
 485         color.green = celltext->background.green;
 486         color.blue = celltext->background.blue;
 487
 488         g_value_set_boxed (value, &color);
 489       }
 490       break;
 491
 492     case PROP_FOREGROUND_GDK:
 493       {
 494         GdkColor color;
 495
 496         color.red = celltext->foreground.red;
 497         color.green = celltext->foreground.green;
 498         color.blue = celltext->foreground.blue;
 499
 500         g_value_set_boxed (value, &color);
 501       }
 502       break;
 503
 504     case PROP_FONT:
 505       {
 506         /* FIXME GValue imposes a totally gratuitous string copy
 507          * here, we could just hand off string ownership
 508          */
 509         gchar *str = pango_font_description_to_string (celltext->font);
 510         g_value_set_string (value, str);
 511         g_free (str);
 512       }
 513       break;
 514
 515     case PROP_FONT_DESC:
 516       g_value_set_boxed (value, celltext->font);
 517       break;
 518
 519     case PROP_FAMILY:
 520       g_value_set_string (value, pango_font_description_get_family (celltext->font));
 521       break;
 522
 523     case PROP_STYLE:
 524       g_value_set_enum (value, pango_font_description_get_style (celltext->font));
 525       break;
 526
 527     case PROP_VARIANT:
 528       g_value_set_enum (value, pango_font_description_get_variant (celltext->font));
 529       break;
 530
 531     case PROP_WEIGHT:
 532       g_value_set_int (value, pango_font_description_get_weight (celltext->font));
 533       break;
 534
 535     case PROP_STRETCH:
 536       g_value_set_enum (value, pango_font_description_get_stretch (celltext->font));
 537       break;
 538
 539     case PROP_SIZE:
 540       g_value_set_int (value, pango_font_description_get_size (celltext->font));
 541       break;
 542
 543     case PROP_SIZE_POINTS:
 544       g_value_set_double (value, ((double)pango_font_description_get_size (celltext->font)) / (double)PANGO_SCALE);
 545       break;
 546
 547     case PROP_SCALE:
 548       g_value_set_double (value, celltext->font_scale);
 549       break;
 550
 551     case PROP_EDITABLE:
 552       g_value_set_boolean (value, celltext->editable);
 553       break;
 554
 555     case PROP_STRIKETHROUGH:
 556       g_value_set_boolean (value, celltext->strikethrough);
 557       break;
 558
 559     case PROP_UNDERLINE:
 560       g_value_set_enum (value, celltext->underline_style);
 561       break;
 562
 563     case PROP_RISE:
 564       g_value_set_int (value, celltext->rise);
 565       break;
 566
 567     case PROP_BACKGROUND_SET:
 568       g_value_set_boolean (value, celltext->background_set);
 569       break;
 570
 571     case PROP_FOREGROUND_SET:
 572       g_value_set_boolean (value, celltext->foreground_set);
 573       break;
 574
 575     case PROP_FAMILY_SET:
 576     case PROP_STYLE_SET:
 577     case PROP_VARIANT_SET:
 578     case PROP_WEIGHT_SET:
 579     case PROP_STRETCH_SET:
 580     case PROP_SIZE_SET:
 581       {
 582         PangoFontMask mask = get_property_font_set_mask (param_id);
 583         g_value_set_boolean (value, (pango_font_description_get_set_fields (celltext->font) & mask) != 0);
 584
 585         break;
 586       }
 587
 588     case PROP_SCALE_SET:
 589       g_value_set_boolean (value, celltext->scale_set);
 590       break;
 591
 592     case PROP_EDITABLE_SET:
 593       g_value_set_boolean (value, celltext->editable_set);
 594       break;
 595
 596     case PROP_STRIKETHROUGH_SET:
 597       g_value_set_boolean (value, celltext->strikethrough_set);
 598       break;
 599
 600     case PROP_UNDERLINE_SET:
 601       g_value_set_boolean (value, celltext->underline_set);
 602       break;
 603
 604     case  PROP_RISE_SET:
 605       g_value_set_boolean (value, celltext->rise_set);
 606       break;
 607
 608     case PROP_BACKGROUND:
 609     case PROP_FOREGROUND:
 610     case PROP_MARKUP:
 611     default:
 612       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 613       break;
 614     }
 615 }
 616
 617
 618 static void
 619 set_bg_color (GtkCellRendererText *celltext,
 620               GdkColor            *color)
 621 {
 622   if (color)
 623     {
 624       if (!celltext->background_set)
 625         {
 626           celltext->background_set = TRUE;
 627           g_object_notify (G_OBJECT (celltext), "background_set");
 628         }
 629
 630       celltext->background.red = color->red;
 631       celltext->background.green = color->green;
 632       celltext->background.blue = color->blue;
 633     }
 634   else
 635     {
 636       if (celltext->background_set)
 637         {
 638           celltext->background_set = FALSE;
 639           g_object_notify (G_OBJECT (celltext), "background_set");
 640         }
 641     }
 642 }
 643
 644
 645 static void
 646 set_fg_color (GtkCellRendererText *celltext,
 647               GdkColor            *color)
 648 {
 649   if (color)
 650     {
 651       if (!celltext->foreground_set)
 652         {
 653           celltext->foreground_set = TRUE;
 654           g_object_notify (G_OBJECT (celltext), "foreground_set");
 655         }
 656
 657       celltext->foreground.red = color->red;
 658       celltext->foreground.green = color->green;
 659       celltext->foreground.blue = color->blue;
 660     }
 661   else
 662     {
 663       if (celltext->foreground_set)
 664         {
 665           celltext->foreground_set = FALSE;
 666           g_object_notify (G_OBJECT (celltext), "foreground_set");
 667         }
 668     }
 669 }
 670
 671 static void
 672 notify_set_changed (GObject       *object,
 673                     PangoFontMask  changed_mask)
 674 {
 675   if (changed_mask & PANGO_FONT_MASK_FAMILY)
 676     g_object_notify (object, "family_set");
 677   if (changed_mask & PANGO_FONT_MASK_STYLE)
 678     g_object_notify (object, "style_set");
 679   if (changed_mask & PANGO_FONT_MASK_VARIANT)
 680     g_object_notify (object, "variant_set");
 681   if (changed_mask & PANGO_FONT_MASK_WEIGHT)
 682     g_object_notify (object, "weight_set");
 683   if (changed_mask & PANGO_FONT_MASK_STRETCH)
 684     g_object_notify (object, "stretch_set");
 685   if (changed_mask & PANGO_FONT_MASK_SIZE)
 686     g_object_notify (object, "size_set");
 687 }
 688
 689 static void
 690 set_font_description (GtkCellRendererText  *celltext,
 691                       PangoFontDescription *font_desc)
 692 {
 693   GObject *object = G_OBJECT (celltext);
 694   PangoFontDescription *new_font_desc;
 695   PangoFontMask old_mask, new_mask, changed_mask, set_changed_mask;
 696
 697   if (font_desc)
 698     new_font_desc = pango_font_description_copy (font_desc);
 699   else
 700     new_font_desc = pango_font_description_new ();
 701
 702   old_mask = pango_font_description_get_set_fields (celltext->font);
 703   new_mask = pango_font_description_get_set_fields (new_font_desc);
 704
 705   changed_mask = old_mask | new_mask;
 706   set_changed_mask = old_mask ^ new_mask;
 707
 708   pango_font_description_free (celltext->font);
 709   celltext->font = new_font_desc;
 710
 711   g_object_freeze_notify (object);
 712
 713   g_object_notify (object, "font_desc");
 714   g_object_notify (object, "font");
 715
 716   if (changed_mask & PANGO_FONT_MASK_FAMILY)
 717     g_object_notify (object, "family");
 718   if (changed_mask & PANGO_FONT_MASK_STYLE)
 719     g_object_notify (object, "style");
 720   if (changed_mask & PANGO_FONT_MASK_VARIANT)
 721     g_object_notify (object, "variant");
 722   if (changed_mask & PANGO_FONT_MASK_WEIGHT)
 723     g_object_notify (object, "weight");
 724   if (changed_mask & PANGO_FONT_MASK_STRETCH)
 725     g_object_notify (object, "stretch");
 726   if (changed_mask & PANGO_FONT_MASK_SIZE)
 727     {
 728       g_object_notify (object, "size");
 729       g_object_notify (object, "size_points");
 730     }
 731
 732   notify_set_changed (object, set_changed_mask);
 733
 734   g_object_thaw_notify (object);
 735 }
 736
 737 static void
 738 gtk_cell_renderer_text_set_property (GObject      *object,
 739                                      guint         param_id,
 740                                      const GValue *value,
 741                                      GParamSpec   *pspec)
 742 {
 743   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 744
 745   switch (param_id)
 746     {
 747     case PROP_TEXT:
 748       if (celltext->text)
 749         g_free (celltext->text);
 750       celltext->text = g_strdup (g_value_get_string (value));
 751       g_object_notify (object, "text");
 752       break;
 753
 754     case PROP_ATTRIBUTES:
 755       if (celltext->extra_attrs)
 756         pango_attr_list_unref (celltext->extra_attrs);
 757
 758       celltext->extra_attrs = g_value_get_boxed (value);
 759       if (celltext->extra_attrs)
 760         pango_attr_list_ref (celltext->extra_attrs);
 761       break;
 762     case PROP_MARKUP:
 763       {
 764         const gchar *str;
 765         gchar *text = NULL;
 766         GError *error = NULL;
 767         PangoAttrList *attrs = NULL;
 768
 769         if (celltext->text)
 770           g_free (celltext->text);
 771
 772         if (celltext->extra_attrs)
 773           pango_attr_list_unref (celltext->extra_attrs);
 774
 775         str = g_value_get_string (value);
 776         if (str && !pango_parse_markup (str,
 777                                         -1,
 778                                         0,
 779                                         &attrs,
 780                                         &text,
 781                                         NULL,
 782                                         &error))
 783           {
 784             g_warning ("Failed to set cell text from markup due to error parsing markup: %s",
 785                        error->message);
 786             g_error_free (error);
 787             return;
 788           }
 789
 790         celltext->text = text;
 791         celltext->extra_attrs = attrs;
 792       }
 793       break;
 794
 795     case PROP_BACKGROUND:
 796       {
 797         GdkColor color;
 798
 799         if (!g_value_get_string (value))
 800           set_bg_color (celltext, NULL);       /* reset to backgrounmd_set to FALSE */
 801         else if (gdk_color_parse (g_value_get_string (value), &color))
 802           set_bg_color (celltext, &color);
 803         else
 804           g_warning ("Don't know color `%s'", g_value_get_string (value));
 805
 806         g_object_notify (object, "background_gdk");
 807       }
 808       break;
 809
 810     case PROP_FOREGROUND:
 811       {
 812         GdkColor color;
 813
 814         if (!g_value_get_string (value))
 815           set_fg_color (celltext, NULL);       /* reset to foreground_set to FALSE */
 816         else if (gdk_color_parse (g_value_get_string (value), &color))
 817           set_fg_color (celltext, &color);
 818         else
 819           g_warning ("Don't know color `%s'", g_value_get_string (value));
 820
 821         g_object_notify (object, "foreground_gdk");
 822       }
 823       break;
 824
 825     case PROP_BACKGROUND_GDK:
 826       /* This notifies the GObject itself. */
 827       set_bg_color (celltext, g_value_get_boxed (value));
 828       break;
 829
 830     case PROP_FOREGROUND_GDK:
 831       /* This notifies the GObject itself. */
 832       set_fg_color (celltext, g_value_get_boxed (value));
 833       break;
 834
 835     case PROP_FONT:
 836       {
 837         PangoFontDescription *font_desc = NULL;
 838         const gchar *name;
 839
 840         name = g_value_get_string (value);
 841
 842         if (name)
 843           font_desc = pango_font_description_from_string (name);
 844
 845         set_font_description (celltext, font_desc);
 846
 847         if (celltext->fixed_height_rows != -1)
 848           celltext->calc_fixed_height = TRUE;
 849       }
 850       break;
 851
 852     case PROP_FONT_DESC:
 853       set_font_description (celltext, g_value_get_boxed (value));
 854
 855       if (celltext->fixed_height_rows != -1)
 856         celltext->calc_fixed_height = TRUE;
 857       break;
 858
 859     case PROP_FAMILY:
 860     case PROP_STYLE:
 861     case PROP_VARIANT:
 862     case PROP_WEIGHT:
 863     case PROP_STRETCH:
 864     case PROP_SIZE:
 865     case PROP_SIZE_POINTS:
 866       {
 867         PangoFontMask old_set_mask = pango_font_description_get_set_fields (celltext->font);
 868
 869         switch (param_id)
 870           {
 871           case PROP_FAMILY:
 872             pango_font_description_set_family (celltext->font,
 873                                                g_value_get_string (value));
 874             break;
 875           case PROP_STYLE:
 876             pango_font_description_set_style (celltext->font,
 877                                               g_value_get_enum (value));
 878             break;
 879           case PROP_VARIANT:
 880             pango_font_description_set_variant (celltext->font,
 881                                                 g_value_get_enum (value));
 882             break;
 883           case PROP_WEIGHT:
 884             pango_font_description_set_weight (celltext->font,
 885                                                g_value_get_enum (value));
 886             break;
 887           case PROP_STRETCH:
 888             pango_font_description_set_stretch (celltext->font,
 889                                                 g_value_get_enum (value));
 890             break;
 891           case PROP_SIZE:
 892             pango_font_description_set_size (celltext->font,
 893                                              g_value_get_int (value));
 894             g_object_notify (object, "size_points");
 895             break;
 896           case PROP_SIZE_POINTS:
 897             pango_font_description_set_size (celltext->font,
 898                                              g_value_get_double (value) * PANGO_SCALE);
 899             g_object_notify (object, "size");
 900             break;
 901           }
 902
 903         if (celltext->fixed_height_rows != -1)
 904           celltext->calc_fixed_height = TRUE;
 905
 906         notify_set_changed (object, old_set_mask & pango_font_description_get_set_fields (celltext->font));
 907         g_object_notify (object, "font_desc");
 908         g_object_notify (object, "font");
 909
 910         break;
 911       }
 912
 913     case PROP_SCALE:
 914       celltext->font_scale = g_value_get_double (value);
 915       celltext->scale_set = TRUE;
 916       if (celltext->fixed_height_rows != -1)
 917         celltext->calc_fixed_height = TRUE;
 918       g_object_notify (object, "scale_set");
 919       break;
 920
 921     case PROP_EDITABLE:
 922       celltext->editable = g_value_get_boolean (value);
 923       celltext->editable_set = TRUE;
 924       g_object_notify (object, "editable_set");
 925       break;
 926
 927     case PROP_STRIKETHROUGH:
 928       celltext->strikethrough = g_value_get_boolean (value);
 929       celltext->strikethrough_set = TRUE;
 930       g_object_notify (object, "strikethrough_set");
 931       break;
 932
 933     case PROP_UNDERLINE:
 934       celltext->underline_style = g_value_get_enum (value);
 935       celltext->underline_set = TRUE;
 936       g_object_notify (object, "underline_set");
 937
 938       break;
 939
 940     case PROP_RISE:
 941       celltext->rise = g_value_get_int (value);
 942       celltext->rise_set = TRUE;
 943       g_object_notify (object, "rise_set");
 944       if (celltext->fixed_height_rows != -1)
 945         celltext->calc_fixed_height = TRUE;
 946       break;
 947
 948     case PROP_BACKGROUND_SET:
 949       celltext->background_set = g_value_get_boolean (value);
 950       break;
 951
 952     case PROP_FOREGROUND_SET:
 953       celltext->foreground_set = g_value_get_boolean (value);
 954       break;
 955
 956     case PROP_FAMILY_SET:
 957     case PROP_STYLE_SET:
 958     case PROP_VARIANT_SET:
 959     case PROP_WEIGHT_SET:
 960     case PROP_STRETCH_SET:
 961     case PROP_SIZE_SET:
 962       if (!g_value_get_boolean (value))
 963         pango_font_description_unset_fields (celltext->font,
 964                                              get_property_font_set_mask (param_id));
 965       break;
 966
 967     case PROP_SCALE_SET:
 968       celltext->scale_set = g_value_get_boolean (value);
 969       break;
 970
 971     case PROP_EDITABLE_SET:
 972       celltext->editable_set = g_value_get_boolean (value);
 973       break;
 974
 975     case PROP_STRIKETHROUGH_SET:
 976       celltext->strikethrough_set = g_value_get_boolean (value);
 977       break;
 978
 979     case PROP_UNDERLINE_SET:
 980       celltext->underline_set = g_value_get_boolean (value);
 981       break;
 982
 983     case PROP_RISE_SET:
 984       celltext->rise_set = g_value_get_boolean (value);
 985       break;
 986
 987     default:
 988       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 989       break;
 990     }
 991 }
 992
 993 /**
 994  * gtk_cell_renderer_text_new:
 995  *
 996  * Creates a new #GtkCellRendererText. Adjust how text is drawn using
 997  * object properties. Object properties can be
 998  * set globally (with g_object_set()). Also, with #GtkTreeViewColumn,
 999  * you can bind a property to a value in a #GtkTreeModel. For example,
1000  * you can bind the "text" property on the cell renderer to a string
1001  * value in the model, thus rendering a different string in each row
1002  * of the #GtkTreeView
1003  *
1004  * Return value: the new cell renderer
1005  **/
1006 GtkCellRenderer *
1007 gtk_cell_renderer_text_new (void)
1008 {
1009   return GTK_CELL_RENDERER (g_object_new (gtk_cell_renderer_text_get_type (), NULL));
1010 }
1011
1012 static void
1013 add_attr (PangoAttrList  *attr_list,
1014           PangoAttribute *attr)
1015 {
1016   attr->start_index = 0;
1017   attr->end_index = G_MAXINT;
1018
1019   pango_attr_list_insert (attr_list, attr);
1020 }
1021
1022 static PangoLayout*
1023 get_layout (GtkCellRendererText *celltext,
1024             GtkWidget           *widget,
1025             gboolean             will_render,
1026             GtkCellRendererState flags)
1027 {
1028   PangoAttrList *attr_list;
1029   PangoLayout *layout;
1030   PangoUnderline uline;
1031
1032   layout = gtk_widget_create_pango_layout (widget, celltext->text);
1033
1034   if (celltext->extra_attrs)
1035     attr_list = pango_attr_list_copy (celltext->extra_attrs);
1036   else
1037     attr_list = pango_attr_list_new ();
1038
1039   if (will_render)
1040     {
1041       /* Add options that affect appearance but not size */
1042
1043       /* note that background doesn't go here, since it affects
1044        * background_area not the PangoLayout area
1045        */
1046
1047       if (celltext->foreground_set)
1048         {
1049           PangoColor color;
1050
1051           color = celltext->foreground;
1052
1053           add_attr (attr_list,
1054                     pango_attr_foreground_new (color.red, color.green, color.blue));
1055         }
1056
1057       if (celltext->strikethrough_set)
1058         add_attr (attr_list,
1059                   pango_attr_strikethrough_new (celltext->strikethrough));
1060     }
1061
1062   add_attr (attr_list, pango_attr_font_desc_new (celltext->font));
1063
1064   if (celltext->scale_set &&
1065       celltext->font_scale != 1.0)
1066     add_attr (attr_list, pango_attr_scale_new (celltext->font_scale));
1067
1068   if (celltext->underline_set)
1069     uline = celltext->underline_style;
1070   else
1071     uline = PANGO_UNDERLINE_NONE;
1072
1073   if ((flags & GTK_CELL_RENDERER_PRELIT) == GTK_CELL_RENDERER_PRELIT)
1074     {
1075       switch (uline)
1076         {
1077         case PANGO_UNDERLINE_NONE:
1078           uline = PANGO_UNDERLINE_SINGLE;
1079           break;
1080
1081         case PANGO_UNDERLINE_SINGLE:
1082           uline = PANGO_UNDERLINE_DOUBLE;
1083           break;
1084
1085         default:
1086           break;
1087         }
1088     }
1089
1090   if (uline != PANGO_UNDERLINE_NONE)
1091     add_attr (attr_list, pango_attr_underline_new (celltext->underline_style));
1092
1093   if (celltext->rise_set)
1094     add_attr (attr_list, pango_attr_rise_new (celltext->rise));
1095
1096   pango_layout_set_attributes (layout, attr_list);
1097   pango_layout_set_width (layout, -1);
1098
1099   pango_attr_list_unref (attr_list);
1100
1101   return layout;
1102 }
1103
1104 static void
1105 gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
1106                                  GtkWidget       *widget,
1107                                  GdkRectangle    *cell_area,
1108                                  gint            *x_offset,
1109                                  gint            *y_offset,
1110                                  gint            *width,
1111                                  gint            *height)
1112 {
1113   GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
1114   PangoRectangle rect;
1115   PangoLayout *layout;
1116
1117   if (celltext->calc_fixed_height)
1118     {
1119       PangoContext *context;
1120       PangoFontMetrics *metrics;
1121       PangoFontDescription *font_desc;
1122       gint row_height;
1123
1124       font_desc = pango_font_description_copy (widget->style->font_desc);
1125       pango_font_description_merge (font_desc, celltext->font, TRUE);
1126
1127       if (celltext->scale_set)
1128         pango_font_description_set_size (font_desc,
1129                                          celltext->font_scale * pango_font_description_get_size (font_desc));
1130
1131       context = gtk_widget_get_pango_context (widget);
1132
1133       metrics = pango_context_get_metrics (context,
1134                                            font_desc,
1135                                            pango_context_get_language (context));
1136       row_height = (pango_font_metrics_get_ascent (metrics) +
1137                     pango_font_metrics_get_descent (metrics));
1138       pango_font_metrics_unref (metrics);
1139
1140       gtk_cell_renderer_set_fixed_size (cell,
1141                                         cell->width, 2*cell->ypad +
1142                                         celltext->fixed_height_rows * PANGO_PIXELS (row_height));
1143
1144       if (height)
1145         {
1146           *height = cell->height;
1147           height = NULL;
1148         }
1149       celltext->calc_fixed_height = FALSE;
1150       if (width == NULL)
1151         return;
1152     }
1153   layout = get_layout (celltext, widget, FALSE, 0);
1154   pango_layout_get_pixel_extents (layout, NULL, &rect);
1155
1156   if (width)
1157     *width = GTK_CELL_RENDERER (celltext)->xpad * 2 + rect.width;
1158
1159   if (height)
1160     *height = GTK_CELL_RENDERER (celltext)->ypad * 2 + rect.height;
1161
1162   if (cell_area)
1163     {
1164       if (x_offset)
1165         {
1166           *x_offset = cell->xalign * (cell_area->width - rect.width - (2 * cell->xpad));
1167           *x_offset = MAX (*x_offset, 0);
1168         }
1169       if (y_offset)
1170         {
1171           *y_offset = cell->yalign * (cell_area->height - rect.height - (2 * cell->ypad));
1172           *y_offset = MAX (*y_offset, 0);
1173         }
1174     }
1175
1176   g_object_unref (G_OBJECT (layout));
1177 }
1178
1179 static void
1180 gtk_cell_renderer_text_render (GtkCellRenderer    *cell,
1181                                GdkWindow          *window,
1182                                GtkWidget          *widget,
1183                                GdkRectangle       *background_area,
1184                                GdkRectangle       *cell_area,
1185                                GdkRectangle       *expose_area,
1186                                guint               flags)
1187
1188 {
1189   GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
1190   PangoLayout *layout;
1191   GtkStateType state;
1192   gint x_offset;
1193   gint y_offset;
1194
1195   layout = get_layout (celltext, widget, TRUE, flags);
1196
1197   gtk_cell_renderer_text_get_size (cell, widget, cell_area, &x_offset, &y_offset, NULL, NULL);
1198
1199   if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
1200     {
1201       if (GTK_WIDGET_HAS_FOCUS (widget))
1202         state = GTK_STATE_SELECTED;
1203       else
1204         state = GTK_STATE_ACTIVE;
1205     }
1206   else
1207     {
1208       state = GTK_STATE_NORMAL;
1209     }
1210
1211   if (celltext->background_set && state != GTK_STATE_SELECTED)
1212     {
1213       GdkColor color;
1214       GdkGC *gc;
1215
1216       color.red = celltext->background.red;
1217       color.green = celltext->background.green;
1218       color.blue = celltext->background.blue;
1219
1220       gc = gdk_gc_new (window);
1221
1222       gdk_gc_set_rgb_fg_color (gc, &color);
1223
1224       gdk_draw_rectangle (window,
1225                           gc,
1226                           TRUE,
1227                           background_area->x,
1228                           background_area->y,
1229                           background_area->width,
1230                           background_area->height);
1231
1232       g_object_unref (G_OBJECT (gc));
1233     }
1234
1235   gtk_paint_layout (widget->style,
1236                     window,
1237                     state,
1238                     TRUE,
1239                     cell_area,
1240                     widget,
1241                     "cellrenderertext",
1242                     cell_area->x + x_offset + cell->xpad,
1243                     cell_area->y + y_offset + cell->ypad,
1244                     layout);
1245
1246   g_object_unref (G_OBJECT (layout));
1247 }
1248 static void
1249 gtk_cell_renderer_text_editing_done (GtkCellEditable *entry,
1250                                      gpointer         data)
1251 {
1252   gchar *path;
1253   gchar *new_text;
1254
1255   path = g_object_get_data (G_OBJECT (entry), GTK_CELL_RENDERER_TEXT_PATH);
1256   new_text = gtk_entry_get_text (GTK_ENTRY (entry));
1257
1258   gtk_signal_emit (GTK_OBJECT (data), text_cell_renderer_signals[EDITED], path, new_text);
1259 }
1260
1261 static GtkCellEditable *
1262 gtk_cell_renderer_text_start_editing (GtkCellRenderer      *cell,
1263                                       GdkEvent             *event,
1264                                       GtkWidget            *widget,
1265                                       gchar                *path,
1266                                       GdkRectangle         *background_area,
1267                                       GdkRectangle         *cell_area,
1268                                       GtkCellRendererState  flags)
1269 {
1270   GtkCellRendererText *celltext;
1271   GtkWidget *entry;
1272
1273   celltext = GTK_CELL_RENDERER_TEXT (cell);
1274
1275   /* If the cell isn't editable we return NULL. */
1276   if (celltext->editable == FALSE)
1277     return NULL;
1278
1279   entry = g_object_new (GTK_TYPE_ENTRY,
1280                         "has_frame", FALSE,
1281                         NULL);
1282
1283   gtk_entry_set_text (GTK_ENTRY (entry), celltext->text);
1284   g_object_set_data_full (G_OBJECT (entry), GTK_CELL_RENDERER_TEXT_PATH, g_strdup (path), g_free);
1285
1286   gtk_editable_select_region (GTK_EDITABLE (entry), 0, -1);
1287
1288   gtk_widget_show (entry);
1289   gtk_signal_connect (GTK_OBJECT (entry),
1290                       "editing_done",
1291                       G_CALLBACK (gtk_cell_renderer_text_editing_done),
1292                       celltext);
1293   return GTK_CELL_EDITABLE (entry);
1294
1295 }
1296
1297 /**
1298  * gtk_cell_renderer_text_set_fixed_height_from_font:
1299  * @renderer: A #GtkCellRendererText
1300  * @number_of_rows: Number of rows of text each cell renderer is allocated, or -1
1301  *
1302  * Sets the height of a renderer to explicitly be determined by the "font" and
1303  * "y_pad" property set on it.  Further changes in these properties do not
1304  * affect the height, so they must be accompanied by a subsequent call to this
1305  * function.  Using this function is unflexible, and should really only be used
1306  * if calculating the size of a cell is too slow (ie, a massive number of cells
1307  * displayed).  If @number_of_rows is -1, then the fixed height is unset, and
1308  * the height is determined by the properties again.
1309  **/
1310 void
1311 gtk_cell_renderer_text_set_fixed_height_from_font (GtkCellRendererText *renderer,
1312                                                    gint                 number_of_rows)
1313 {
1314   g_return_if_fail (GTK_IS_CELL_RENDERER_TEXT (renderer));
1315   g_return_if_fail (number_of_rows == -1 || number_of_rows > 0);
1316
1317   if (number_of_rows == -1)
1318     {
1319       gtk_cell_renderer_set_fixed_size (GTK_CELL_RENDERER (renderer),
1320                                         GTK_CELL_RENDERER (renderer)->width,
1321                                         -1);
1322     }
1323   else
1324     {
1325       renderer->fixed_height_rows = number_of_rows;
1326       renderer->calc_fixed_height = TRUE;
1327     }
1328 }