src/widgets/font-selector.cpp

   1 #define __SP_FONT_SELECTOR_C__
   2
   3 /*
   4  * Font selection widgets
   5  *
   6  * Authors:
   7  *   Chris Lahey <clahey@ximian.com>
   8  *   Lauris Kaplinski <lauris@kaplinski.com>
   9  *   bulia byak <buliabyak@users.sf.net>
  10  *   Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
  11  *
  12  * Copyright (C) 1999-2001 Ximian, Inc.
  13  * Copyright (C) 2002 Lauris Kaplinski
  14  * Copyright (C) -2007 Authors
  15  *
  16  * Released under GNU GPL, read the file 'COPYING' for more information
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include "config.h"
  21 #endif
  22
  23 #include <libnr/nr-blit.h>
  24 #include <libnrtype/font-instance.h>
  25 #include <libnrtype/raster-glyph.h>
  26 #include <libnrtype/RasterFont.h>
  27 #include <libnrtype/TextWrapper.h>
  28 #include <libnrtype/one-glyph.h>
  29 #include <libnrtype/font-lister.h>
  30
  31 #include <gtk/gtk.h>
  32 #include <gtk/gtkframe.h>
  33 #include <gtk/gtkscrolledwindow.h>
  34 #include <gtk/gtkclist.h>
  35 #include <gtk/gtkvbox.h>
  36 #include <gtk/gtkcombo.h>
  37 #include <gtk/gtkentry.h>
  38 #include <gtk/gtkdrawingarea.h>
  39
  40 #include "../display/nr-plain-stuff-gdk.h"
  41 #include <glibmm/i18n.h>
  42
  43 #include "../desktop.h"
  44 #include "font-selector.h"
  45
  46 /* SPFontSelector */
  47
  48 struct SPFontSelector
  49 {
  50     GtkHBox hbox;
  51
  52     unsigned int block_emit : 1;
  53
  54     GtkWidget *family;
  55     GtkWidget *style;
  56     GtkWidget *size;
  57
  58     GtkWidget *family_treeview;
  59     GtkWidget *style_treeview;
  60
  61     NRNameList families;
  62     NRStyleList styles;
  63     int familyidx;
  64     int styleidx;
  65     gfloat fontsize;
  66     bool fontsize_dirty;
  67     font_instance *font;
  68 };
  69
  70
  71 struct SPFontSelectorClass
  72 {
  73     GtkHBoxClass parent_class;
  74
  75     void (* font_set) (SPFontSelector *fsel, font_instance *font);
  76 };
  77
  78 enum {
  79     FONT_SET,
  80     LAST_SIGNAL
  81 };
  82
  83 static void sp_font_selector_class_init         (SPFontSelectorClass    *c);
  84 static void sp_font_selector_init               (SPFontSelector         *fsel);
  85 static void sp_font_selector_destroy            (GtkObject              *object);
  86
  87 static void sp_font_selector_family_select_row  (GtkTreeSelection       *selection,
  88                                                  SPFontSelector         *fsel);
  89
  90 static void sp_font_selector_style_select_row   (GtkTreeSelection       *selection,
  91                                                  SPFontSelector         *fsel);
  92
  93 static void sp_font_selector_size_changed       (GtkComboBox            *combobox,
  94                                                  SPFontSelector         *fsel);
  95
  96 static void sp_font_selector_emit_set           (SPFontSelector         *fsel);
  97
  98 namespace {
  99     const char *sizes[] = {
 100         "4", "6", "8", "9", "10", "11", "12", "13", "14",
 101         "16", "18", "20", "22", "24", "28",
 102         "32", "36", "40", "48", "56", "64", "72", "144",
 103         NULL
 104     };
 105 }
 106
 107 static GtkHBoxClass *fs_parent_class = NULL;
 108 static guint fs_signals[LAST_SIGNAL] = { 0 };
 109
 110 GType sp_font_selector_get_type()
 111 {
 112     static GType type = 0;
 113     if (!type) {
 114         GTypeInfo info = {
 115             sizeof(SPFontSelectorClass),
 116             0, // base_init
 117             0, // base_finalize
 118             (GClassInitFunc)sp_font_selector_class_init,
 119             0, // class_finalize
 120             0, // class_data
 121             sizeof(SPFontSelector),
 122             0, // n_preallocs
 123             (GInstanceInitFunc)sp_font_selector_init,
 124             0 // value_table
 125         };
 126         type = g_type_register_static(GTK_TYPE_HBOX, "SPFontSelector", &info, static_cast<GTypeFlags>(0));
 127     }
 128     return type;
 129 }
 130
 131 static void sp_font_selector_class_init(SPFontSelectorClass *c)
 132 {
 133     GtkObjectClass *object_class = (GtkObjectClass *) c;
 134
 135     fs_parent_class = (GtkHBoxClass* )gtk_type_class(GTK_TYPE_HBOX);
 136
 137     fs_signals[FONT_SET] = gtk_signal_new ("font_set",
 138                                            GTK_RUN_FIRST,
 139                                            GTK_CLASS_TYPE(object_class),
 140                                            GTK_SIGNAL_OFFSET(SPFontSelectorClass, font_set),
 141                                            gtk_marshal_NONE__POINTER,
 142                                            GTK_TYPE_NONE,
 143                                            1, GTK_TYPE_POINTER);
 144
 145     object_class->destroy = sp_font_selector_destroy;
 146 }
 147
 148 static void sp_font_selector_init(SPFontSelector *fsel)
 149 {
 150         gtk_box_set_homogeneous(GTK_BOX(fsel), TRUE);
 151         gtk_box_set_spacing(GTK_BOX(fsel), 4);
 152
 153         /* Family frame */
 154         GtkWidget *f = gtk_frame_new(_("Font family"));
 155         gtk_widget_show (f);
 156         gtk_box_pack_start (GTK_BOX(fsel), f, TRUE, TRUE, 0);
 157
 158         GtkWidget *sw = gtk_scrolled_window_new(NULL, NULL);
 159         gtk_widget_show(sw);
 160         gtk_container_set_border_width(GTK_CONTAINER (sw), 4);
 161         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 162         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
 163         gtk_container_add(GTK_CONTAINER(f), sw);
 164
 165         Inkscape::FontLister* fontlister = Inkscape::FontLister::get_instance();
 166
 167         fsel->family_treeview = gtk_tree_view_new ();
 168         GtkTreeViewColumn *column = gtk_tree_view_column_new ();
 169         GtkCellRenderer *cell = gtk_cell_renderer_text_new ();
 170         gtk_tree_view_column_pack_start (column, cell, FALSE);
 171         gtk_tree_view_column_set_attributes (column, cell, "text", 0, NULL);
 172         gtk_tree_view_append_column (GTK_TREE_VIEW(fsel->family_treeview), column);
 173         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(fsel->family_treeview), FALSE);
 174         Glib::RefPtr<Gtk::ListStore> store = fontlister->get_font_list();
 175         gtk_tree_view_set_model (GTK_TREE_VIEW(fsel->family_treeview), GTK_TREE_MODEL (Glib::unwrap (store)));
 176         gtk_container_add(GTK_CONTAINER(sw), fsel->family_treeview);
 177         gtk_widget_show_all (sw);
 178
 179         GtkTreeSelection *selection = gtk_tree_view_get_selection (GTK_TREE_VIEW(fsel->family_treeview));
 180         g_signal_connect (G_OBJECT(selection), "changed", G_CALLBACK (sp_font_selector_family_select_row), fsel);
 181         g_object_set_data (G_OBJECT(fsel), "family-treeview", fsel->family_treeview);
 182
 183
 184         /* Style frame */
 185         f = gtk_frame_new(_("Style"));
 186         gtk_widget_show(f);
 187         gtk_box_pack_start(GTK_BOX (fsel), f, TRUE, TRUE, 0);
 188
 189         GtkWidget *vb = gtk_vbox_new(FALSE, 4);
 190         gtk_widget_show(vb);
 191         gtk_container_set_border_width(GTK_CONTAINER (vb), 4);
 192         gtk_container_add(GTK_CONTAINER(f), vb);
 193
 194         sw = gtk_scrolled_window_new(NULL, NULL);
 195         gtk_widget_show(sw);
 196         gtk_container_set_border_width(GTK_CONTAINER (sw), 4);
 197         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 198         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
 199         gtk_box_pack_start(GTK_BOX (vb), sw, TRUE, TRUE, 0);
 200
 201         fsel->style_treeview = gtk_tree_view_new ();
 202         column = gtk_tree_view_column_new ();
 203         cell = gtk_cell_renderer_text_new ();
 204         gtk_tree_view_column_pack_start (column, cell, FALSE);
 205         gtk_tree_view_column_set_attributes (column, cell, "text", 0, NULL);
 206         gtk_tree_view_append_column (GTK_TREE_VIEW(fsel->style_treeview), column);
 207         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(fsel->style_treeview), FALSE);
 208         gtk_container_add(GTK_CONTAINER(sw), fsel->style_treeview);
 209         gtk_widget_show_all (sw);
 210
 211         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW(fsel->style_treeview));
 212         g_signal_connect (G_OBJECT(selection), "changed", G_CALLBACK (sp_font_selector_style_select_row), fsel);
 213
 214         GtkWidget *hb = gtk_hbox_new(FALSE, 4);
 215         gtk_widget_show(hb);
 216         gtk_box_pack_start(GTK_BOX(vb), hb, FALSE, FALSE, 0);
 217
 218         fsel->size = gtk_combo_box_entry_new_text ();
 219         gtk_widget_set_size_request(fsel->size, 90, -1);
 220         g_signal_connect (G_OBJECT(fsel->size), "changed", G_CALLBACK (sp_font_selector_size_changed), fsel);
 221         gtk_box_pack_end (GTK_BOX(hb), fsel->size, FALSE, FALSE, 0);
 222
 223         GtkWidget *l = gtk_label_new(_("Font size:"));
 224         gtk_widget_show_all (l);
 225         gtk_box_pack_end(GTK_BOX (hb), l, FALSE, FALSE, 0);
 226
 227         for (unsigned int n = 0; sizes[n]; ++n)
 228             {
 229                 gtk_combo_box_append_text (GTK_COMBO_BOX(fsel->size), sizes[n]);
 230             }
 231
 232         gtk_widget_show_all (fsel->size);
 233
 234         fsel->familyidx = 0;
 235         fsel->styleidx = 0;
 236         fsel->fontsize = 10.0;
 237         fsel->fontsize_dirty = false;
 238         fsel->font = NULL;
 239 }
 240
 241 static void sp_font_selector_destroy(GtkObject *object)
 242 {
 243     SPFontSelector *fsel = SP_FONT_SELECTOR (object);
 244
 245     if (fsel->font) {
 246         fsel->font->Unref();
 247         fsel->font = NULL;
 248     }
 249
 250     if (fsel->families.length > 0) {
 251         nr_name_list_release(&fsel->families);
 252         fsel->families.length = 0;
 253     }
 254
 255     if (fsel->styles.length > 0) {
 256         nr_style_list_release(&fsel->styles);
 257         fsel->styles.length = 0;
 258     }
 259
 260     if (GTK_OBJECT_CLASS(fs_parent_class)->destroy) {
 261         GTK_OBJECT_CLASS(fs_parent_class)->destroy(object);
 262     }
 263 }
 264
 265 static void sp_font_selector_family_select_row(GtkTreeSelection *selection,
 266                                                SPFontSelector *fsel)
 267 {
 268     GtkTreeIter   iter;
 269     GtkTreeModel *model;
 270     GtkListStore *store;
 271     GtkTreePath  *path;
 272     GList        *list=0;
 273
 274     if (!gtk_tree_selection_get_selected (selection, &model, &iter)) return;
 275
 276     path = gtk_tree_model_get_path (model, &iter);
 277     gtk_tree_model_get (model, &iter, 1, &list, -1);
 278     fsel->familyidx = gtk_tree_path_get_indices (path)[0];
 279     fsel->styleidx = 0;
 280
 281     store = gtk_list_store_new (1, G_TYPE_STRING);
 282
 283     for ( ; list ; list = list->next )
 284     {
 285         gtk_list_store_append (store, &iter);
 286         gtk_list_store_set (store, &iter, 0, (char*)list->data, -1);
 287     }
 288
 289     gtk_tree_view_set_model (GTK_TREE_VIEW (fsel->style_treeview), GTK_TREE_MODEL (store));
 290     path = gtk_tree_path_new ();
 291     gtk_tree_path_append_index (path, 0);
 292     gtk_tree_selection_select_path (gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->style_treeview)), path);
 293     gtk_tree_path_free (path);
 294 }
 295
 296 static void sp_font_selector_style_select_row (GtkTreeSelection *selection,
 297                                                SPFontSelector   *fsel)
 298 {
 299     GtkTreeModel *model;
 300     GtkTreePath  *path;
 301     GtkTreeIter   iter;
 302
 303     if (!gtk_tree_selection_get_selected (selection, &model, &iter)) return;
 304
 305     path = gtk_tree_model_get_path (model, &iter);
 306     fsel->styleidx = gtk_tree_path_get_indices (path)[0];
 307
 308     if (!fsel->block_emit)
 309     {
 310         sp_font_selector_emit_set (fsel);
 311     }
 312 }
 313
 314 static void sp_font_selector_size_changed( GtkComboBox */*cbox*/, SPFontSelector *fsel )
 315 {
 316     char *text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (fsel->size));
 317     gfloat old_size = fsel->fontsize;
 318
 319     gchar *endptr;
 320     gdouble value = -1;
 321     if (text) {
 322         value = g_strtod (text, &endptr);
 323         if (endptr == text) // conversion failed, non-numeric input
 324             value = -1;
 325         free (text);
 326     }
 327     if (value <= 0) {
 328         return; // could not parse value
 329     }
 330     if (value > 10000)
 331         value = 10000; // somewhat arbitrary, but text&font preview freezes with too huge fontsizes
 332
 333     fsel->fontsize = value;
 334     if ( fabs(fsel->fontsize-old_size) > 0.001)
 335     {
 336         fsel->fontsize_dirty = true;
 337     }
 338
 339     sp_font_selector_emit_set (fsel);
 340 }
 341
 342 static void sp_font_selector_emit_set (SPFontSelector *fsel)
 343 {
 344     font_instance *font;
 345
 346     GtkTreeSelection *selection_family;
 347     GtkTreeSelection *selection_style;
 348     GtkTreeModel     *model_family;
 349     GtkTreeModel     *model_style;
 350     GtkTreeIter       iter_family;
 351     GtkTreeIter       iter_style;
 352     char             *family=0, *style=0;
 353
 354     //We need to check this here since most GtkTreeModel operations are not atomic
 355     //See GtkListStore documenation, Chapter "Atomic Operations" --mderezynski
 356
 357     model_family = gtk_tree_view_get_model (GTK_TREE_VIEW (fsel->family_treeview));
 358     if (!model_family) return;
 359     model_style = gtk_tree_view_get_model (GTK_TREE_VIEW (fsel->style_treeview));
 360     if (!model_style) return;
 361
 362     selection_family = gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->family_treeview));
 363     selection_style = gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->style_treeview));
 364
 365     if (!gtk_tree_selection_get_selected (selection_family, NULL, &iter_family)) return;
 366     if (!gtk_tree_selection_get_selected (selection_style, NULL, &iter_style)) return;
 367
 368     gtk_tree_model_get (model_family, &iter_family, 0, &family, -1);
 369     gtk_tree_model_get (model_style, &iter_style, 0, &style, -1);
 370
 371     if ((!family) || (!style)) return;
 372
 373     font = (font_factory::Default())->FaceFromUIStrings (family, style);
 374
 375     // FIXME: when a text object uses non-available font, font==NULL and we can't set size
 376     // (and the size shown in the widget is invalid). To fix, here we must always get some
 377     // default font, exactly the same as sptext uses for on-canvas display, so that
 378     // font!=NULL ever.
 379     if (font != fsel->font || ( font && fsel->fontsize_dirty ) ) {
 380         if ( font ) {
 381             font->Ref();
 382         }
 383         if ( fsel->font ) {
 384             fsel->font->Unref();
 385         }
 386         fsel->font = font;
 387         gtk_signal_emit(GTK_OBJECT(fsel), fs_signals[FONT_SET], fsel->font);
 388     }
 389     fsel->fontsize_dirty = false;
 390     if (font) {
 391         font->Unref();
 392     }
 393     font = NULL;
 394 }
 395
 396 GtkWidget *sp_font_selector_new()
 397 {
 398     SPFontSelector *fsel = (SPFontSelector*) gtk_type_new(SP_TYPE_FONT_SELECTOR);
 399
 400     return (GtkWidget *) fsel;
 401 }
 402
 403 void sp_font_selector_set_font (SPFontSelector *fsel, font_instance *font, double size)
 404 {
 405     if (font)
 406     {
 407         Gtk::TreePath path;
 408         font_instance *tempFont = NULL;
 409
 410         Glib::ustring family = font_factory::Default()->GetUIFamilyString(font->descr);
 411
 412         try {
 413             path = Inkscape::FontLister::get_instance()->get_row_for_font (family);
 414         } catch (...) {
 415             return;
 416         }
 417
 418         fsel->block_emit = TRUE;
 419         gtk_tree_selection_select_path (gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->family_treeview)), path.gobj());
 420         gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (fsel->family_treeview), path.gobj(), NULL, TRUE, 0.5, 0.5);
 421         fsel->block_emit = FALSE;
 422
 423         GList *list = 0;
 424         GtkTreeIter iter;
 425         GtkTreeModel *model = gtk_tree_view_get_model (GTK_TREE_VIEW(fsel->family_treeview));
 426         gtk_tree_model_get_iter (model, &iter, path.gobj());
 427         gtk_tree_model_get (model, &iter, 1, &list, -1);
 428
 429         unsigned int currentStyleNumber = 0;
 430         unsigned int bestStyleNumber = 0;
 431
 432         PangoFontDescription *incomingFont = pango_font_description_copy(font->descr);
 433         pango_font_description_unset_fields(incomingFont, PANGO_FONT_MASK_SIZE);
 434
 435         char *incomingFontString = pango_font_description_to_string(incomingFont);
 436
 437         tempFont = (font_factory::Default())->FaceFromUIStrings(family.c_str(), (char*)list->data);
 438
 439         PangoFontDescription *bestMatchForFont = NULL;
 440         if (tempFont) {
 441             bestMatchForFont = pango_font_description_copy(tempFont->descr);
 442             tempFont->Unref();
 443             tempFont = NULL;
 444         }
 445
 446         pango_font_description_unset_fields(bestMatchForFont, PANGO_FONT_MASK_SIZE);
 447
 448         list = list->next;
 449
 450         while (list) {
 451             currentStyleNumber++;
 452
 453             tempFont = font_factory::Default()->FaceFromUIStrings(family.c_str(), (char*)list->data);
 454
 455             PangoFontDescription *currentMatchForFont = NULL;
 456             if (tempFont) {
 457                 currentMatchForFont = pango_font_description_copy(tempFont->descr);
 458                 tempFont->Unref();
 459                 tempFont = NULL;
 460             }
 461
 462             if (currentMatchForFont) {
 463                 pango_font_description_unset_fields(currentMatchForFont, PANGO_FONT_MASK_SIZE);
 464
 465                 char *currentMatchString = pango_font_description_to_string(currentMatchForFont);
 466
 467                 if (!strcmp(incomingFontString, currentMatchString)
 468                         || pango_font_description_better_match(incomingFont, bestMatchForFont, currentMatchForFont)) {
 469                     // Found a better match for the font we are looking for
 470                     pango_font_description_free(bestMatchForFont);
 471                     bestMatchForFont = pango_font_description_copy(currentMatchForFont);
 472                     bestStyleNumber = currentStyleNumber;
 473                 }
 474
 475                 g_free(currentMatchString);
 476
 477                 pango_font_description_free(currentMatchForFont);
 478             }
 479
 480             list = list->next;
 481         }
 482
 483         if (bestMatchForFont)
 484             pango_font_description_free(bestMatchForFont);
 485         if (incomingFont)
 486             pango_font_description_free(incomingFont);
 487         g_free(incomingFontString);
 488
 489         GtkTreePath *path_c = gtk_tree_path_new ();
 490         gtk_tree_path_append_index (path_c, bestStyleNumber);
 491         gtk_tree_selection_select_path (gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->style_treeview)), path_c);
 492         gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (fsel->style_treeview), path_c, NULL, TRUE, 0.5, 0.5);
 493
 494         if (size != fsel->fontsize)
 495         {
 496             gchar s[8];
 497             g_snprintf (s, 8, "%.5g", size); // UI, so printf is ok
 498             gtk_entry_set_text (GTK_ENTRY (GTK_BIN(fsel->size)->child), s);
 499             fsel->fontsize = size;
 500         }
 501     }
 502
 503 }
 504
 505 font_instance* sp_font_selector_get_font(SPFontSelector *fsel)
 506 {
 507     if (fsel->font) {
 508         fsel->font->Ref();
 509     }
 510
 511     return fsel->font;
 512 }
 513
 514 double sp_font_selector_get_size(SPFontSelector *fsel)
 515 {
 516     return fsel->fontsize;
 517 }
 518
 519 /* SPFontPreview */
 520
 521 struct SPFontPreview
 522 {
 523     GtkDrawingArea darea;
 524
 525     font_instance *font;
 526     raster_font *rfont;
 527     gchar *phrase;
 528     unsigned long rgba;
 529 };
 530
 531 struct SPFontPreviewClass
 532 {
 533     GtkDrawingAreaClass parent_class;
 534 };
 535
 536 static void sp_font_preview_class_init(SPFontPreviewClass *c);
 537 static void sp_font_preview_init(SPFontPreview *fsel);
 538 static void sp_font_preview_destroy(GtkObject *object);
 539
 540 void sp_font_preview_size_request(GtkWidget *widget, GtkRequisition *req);
 541 static gint sp_font_preview_expose(GtkWidget *widget, GdkEventExpose *event);
 542
 543 static GtkDrawingAreaClass *fp_parent_class = NULL;
 544
 545 GType sp_font_preview_get_type()
 546 {
 547     static GType type = 0;
 548     if (!type) {
 549         GTypeInfo info = {
 550             sizeof(SPFontPreviewClass),
 551             0, // base_init
 552             0, // base_finalize
 553             (GClassInitFunc)sp_font_preview_class_init,
 554             0, // class_finalize
 555             0, // class_data
 556             sizeof(SPFontPreview),
 557             0, // n_preallocs
 558             (GInstanceInitFunc)sp_font_preview_init,
 559             0 // value_table
 560         };
 561         type = g_type_register_static(GTK_TYPE_DRAWING_AREA, "SPFontPreview", &info, static_cast<GTypeFlags>(0));
 562     }
 563     return type;
 564 }
 565
 566 static void sp_font_preview_class_init (SPFontPreviewClass *c)
 567 {
 568     GtkObjectClass *object_class = (GtkObjectClass *) c;
 569     GtkWidgetClass *widget_class = (GtkWidgetClass *) c;
 570
 571     fp_parent_class = (GtkDrawingAreaClass*) gtk_type_class(GTK_TYPE_DRAWING_AREA);
 572
 573     object_class->destroy = sp_font_preview_destroy;
 574
 575     widget_class->size_request = sp_font_preview_size_request;
 576     widget_class->expose_event = sp_font_preview_expose;
 577 }
 578
 579 static void sp_font_preview_init(SPFontPreview *fprev)
 580 {
 581     fprev->rgba = 0x000000ff;
 582 }
 583
 584 static void sp_font_preview_destroy(GtkObject *object)
 585 {
 586     SPFontPreview *fprev = SP_FONT_PREVIEW (object);
 587
 588     if (fprev->rfont) {
 589         fprev->rfont->Unref();
 590         fprev->rfont = NULL;
 591     }
 592
 593     if (fprev->font) {
 594         fprev->font->Unref();
 595         fprev->font = NULL;
 596     }
 597
 598     g_free(fprev->phrase);
 599     fprev->phrase = NULL;
 600
 601     if (GTK_OBJECT_CLASS (fp_parent_class)->destroy) {
 602         GTK_OBJECT_CLASS (fp_parent_class)->destroy(object);
 603     }
 604 }
 605
 606 void sp_font_preview_size_request(GtkWidget */*widget*/, GtkRequisition *req)
 607 {
 608     req->width = 256;
 609     req->height = 32;
 610 }
 611
 612 #define SPFP_MAX_LEN 64
 613
 614 static gint sp_font_preview_expose(GtkWidget *widget, GdkEventExpose *event)
 615 {
 616     SPFontPreview *fprev = SP_FONT_PREVIEW(widget);
 617
 618     if (GTK_WIDGET_DRAWABLE (widget)) {
 619         if (fprev->rfont) {
 620
 621             int glyphs[SPFP_MAX_LEN];
 622             double hpos[SPFP_MAX_LEN];
 623
 624             font_instance *tface = fprev->rfont->daddy;
 625
 626             double theSize = NR::expansion(fprev->rfont->style.transform);
 627
 628             gchar const *p;
 629             if (fprev->phrase) {
 630                 p = fprev->phrase;
 631             } else {
 632                 /* TRANSLATORS: Test string used in text and font dialog (when no
 633                  * text has been entered) to get a preview of the font.  Choose
 634                  * some representative characters that users of your locale will be
 635                  * interested in. */
 636                 p = _("AaBbCcIiPpQq12369$\342\202\254\302\242?.;/()");
 637             }
 638             int len = 0;
 639
 640             NRRect bbox;
 641             bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0.0;
 642
 643             text_wrapper* str_text=new text_wrapper;
 644             str_text->SetDefaultFont(tface);
 645             str_text->AppendUTF8(p,-1);
 646             if ( str_text->uni32_length > 0 ) {
 647                 str_text->DoLayout();
 648                 if ( str_text->glyph_length > 0 ) {
 649                     PangoFont *curPF = NULL;
 650                     font_instance *curF = NULL;
 651                     for (int i = 0; i < str_text->glyph_length && i < SPFP_MAX_LEN; i++) {
 652                         if ( str_text->glyph_text[i].font != curPF ) {
 653                             curPF = str_text->glyph_text[i].font;
 654                             if (curF) {
 655                                 curF->Unref();
 656                             }
 657                             curF = NULL;
 658                             if ( curPF ) {
 659                                 PangoFontDescription* pfd = pango_font_describe(curPF);
 660                                 curF = (font_factory::Default())->Face(pfd);
 661                                 pango_font_description_free(pfd);
 662                             }
 663                         }
 664                         NR::Point base_pt(str_text->glyph_text[i].x, str_text->glyph_text[i].y);
 665                         base_pt *= theSize;
 666
 667                         glyphs[len] = str_text->glyph_text[i].gl;
 668                         hpos[len] = base_pt[0];
 669                         len++;
 670                         if ( curF ) {
 671                             NR::Maybe<NR::Rect> nbbox = curF->BBox(str_text->glyph_text[i].gl);
 672                             if (nbbox) {
 673                                 bbox.x0 = MIN(bbox.x0, base_pt[NR::X] + theSize * (nbbox->min())[0]);
 674                                 bbox.y0 = MIN(bbox.y0, base_pt[NR::Y] - theSize * (nbbox->max())[1]);
 675                                 bbox.x1 = MAX(bbox.x1, base_pt[NR::X] + theSize * (nbbox->max())[0]);
 676                                 bbox.y1 = MAX(bbox.y1, base_pt[NR::Y] - theSize * (nbbox->min())[1]);
 677                             }
 678                         }
 679                     }
 680                     if ( curF ) {
 681                         curF->Unref();
 682                     }
 683                 }
 684             }
 685
 686             // XXX: FIXME: why does this code ignore adv.y
 687             /*                  while (p && *p && (len < SPFP_MAX_LEN)) {
 688                                 unsigned int unival;
 689                                 NRRect gbox;
 690                                 unival = g_utf8_get_char (p);
 691                                 glyphs[len] =  tface->MapUnicodeChar( unival);
 692                                 hpos[len] = (int)px;
 693                                 NR::Point adv = fprev->rfont->Advance(glyphs[len]);
 694                                 fprev->rfont->BBox( glyphs[len], &gbox);
 695                                 bbox.x0 = MIN (px + gbox.x0, bbox.x0);
 696                                 bbox.y0 = MIN (py + gbox.y0, bbox.y0);
 697                                 bbox.x1 = MAX (px + gbox.x1, bbox.x1);
 698                                 bbox.y1 = MAX (py + gbox.y1, bbox.y1);
 699                                 px += adv[NR::X];
 700                                 len += 1;
 701                                 p = g_utf8_next_char (p);
 702                                 }*/
 703
 704             float startx = (widget->allocation.width - (bbox.x1 - bbox.x0)) / 2;
 705             float starty = widget->allocation.height - (widget->allocation.height - (bbox.y1 - bbox.y0)) / 2 - bbox.y1;
 706
 707             for (int y = event->area.y; y < event->area.y + event->area.height; y += 64) {
 708                 for (int x = event->area.x; x < event->area.x + event->area.width; x += 64) {
 709                     NRPixBlock pb, m;
 710                     int x0 = x;
 711                     int y0 = y;
 712                     int x1 = MIN(x0 + 64, event->area.x + event->area.width);
 713                     int y1 = MIN(y0 + 64, event->area.y + event->area.height);
 714                     guchar *ps = nr_pixelstore_16K_new (TRUE, 0xff);
 715                     nr_pixblock_setup_extern(&pb, NR_PIXBLOCK_MODE_R8G8B8, x0, y0, x1, y1, ps, 3 * (x1 - x0), FALSE, FALSE);
 716                     nr_pixblock_setup_fast(&m, NR_PIXBLOCK_MODE_A8, x0, y0, x1, y1, TRUE);
 717                     pb.empty = FALSE;
 718
 719                     PangoFont *curPF = NULL;
 720                     font_instance *curF = NULL;
 721                     raster_font *curRF = NULL;
 722                     for (int i=0; i < len; i++) {
 723                         if ( str_text->glyph_text[i].font != curPF ) {
 724                             curPF=str_text->glyph_text[i].font;
 725                             if ( curF ) {
 726                                 curF->Unref();
 727                             }
 728                             curF = NULL;
 729                             if ( curPF ) {
 730                                 PangoFontDescription* pfd = pango_font_describe(curPF);
 731                                 curF=(font_factory::Default())->Face(pfd);
 732                                 pango_font_description_free(pfd);
 733                             }
 734                             if ( curF ) {
 735                                 if ( curRF ) {
 736                                     curRF->Unref();
 737                                 }
 738                                 curRF = NULL;
 739                                 curRF = curF->RasterFont(fprev->rfont->style);
 740                             }
 741                         }
 742                         raster_glyph *g = (curRF) ? curRF->GetGlyph(glyphs[i]) : NULL;
 743                         if ( g ) {
 744                             g->Blit(NR::Point(hpos[i] + startx, starty), m);
 745                         }
 746                     }
 747                     if (curRF) {
 748                         curRF->Unref();
 749                     }
 750                     if (curF) {
 751                         curF->Unref();
 752                     }
 753
 754                     nr_blit_pixblock_mask_rgba32(&pb, &m, fprev->rgba);
 755                     gdk_draw_rgb_image(widget->window, widget->style->black_gc,
 756                                        x0, y0, x1 - x0, y1 - y0,
 757                                        GDK_RGB_DITHER_NONE, NR_PIXBLOCK_PX (&pb), pb.rs);
 758                     nr_pixblock_release(&m);
 759                     nr_pixblock_release(&pb);
 760                     nr_pixelstore_16K_free(ps);
 761                 }
 762             }
 763
 764             delete str_text;
 765
 766         } else {
 767             nr_gdk_draw_gray_garbage(widget->window, widget->style->black_gc,
 768                                      event->area.x, event->area.y,
 769                                      event->area.width, event->area.height);
 770         }
 771     }
 772
 773     return TRUE;
 774 }
 775
 776 GtkWidget * sp_font_preview_new()
 777 {
 778     GtkWidget *w = (GtkWidget*) gtk_type_new(SP_TYPE_FONT_PREVIEW);
 779
 780     return w;
 781 }
 782
 783 void sp_font_preview_set_font(SPFontPreview *fprev, font_instance *font, SPFontSelector *fsel)
 784 {
 785         if (font)
 786         {
 787             font->Ref();
 788         }
 789
 790         if (fprev->font)
 791         {
 792             fprev->font->Unref();
 793         }
 794
 795         fprev->font = font;
 796
 797         if (fprev->rfont)
 798         {
 799             fprev->rfont->Unref();
 800             fprev->rfont=NULL;
 801         }
 802
 803         if (fprev->font)
 804         {
 805             NR::Matrix flip(NR::scale(fsel->fontsize, -fsel->fontsize));
 806             fprev->rfont = fprev->font->RasterFont(flip, 0);
 807         }
 808
 809         if (GTK_WIDGET_DRAWABLE (fprev)) gtk_widget_queue_draw (GTK_WIDGET (fprev));
 810 }
 811
 812 void sp_font_preview_set_rgba32(SPFontPreview *fprev, guint32 rgba)
 813 {
 814     fprev->rgba = rgba;
 815     if (GTK_WIDGET_DRAWABLE (fprev)) {
 816         gtk_widget_queue_draw (GTK_WIDGET (fprev));
 817     }
 818 }
 819
 820 void sp_font_preview_set_phrase(SPFontPreview *fprev, const gchar *phrase)
 821 {
 822     g_free (fprev->phrase);
 823     if (phrase) {
 824         fprev->phrase = g_strdup (phrase);
 825     } else {
 826         fprev->phrase = NULL;
 827     }
 828     if (GTK_WIDGET_DRAWABLE(fprev)) {
 829         gtk_widget_queue_draw (GTK_WIDGET (fprev));
 830     }
 831 }
 832
 833
 834 /*
 835   Local Variables:
 836   mode:c++
 837   c-file-style:"stroustrup"
 838   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 839   indent-tabs-mode:nil
 840   fill-column:99
 841   End:
 842 */
 843 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :