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 <libnr/nr-convert2geom.h>
  25 #include <libnrtype/font-instance.h>
  26 #include <libnrtype/raster-glyph.h>
  27 #include <libnrtype/RasterFont.h>
  28 #include <libnrtype/TextWrapper.h>
  29 #include <libnrtype/one-glyph.h>
  30 #include <libnrtype/font-lister.h>
  31
  32 #include <2geom/transforms.h>
  33
  34 #include <gtk/gtk.h>
  35 #include <gtk/gtkframe.h>
  36 #include <gtk/gtkscrolledwindow.h>
  37 #include <gtk/gtkclist.h>
  38 #include <gtk/gtkvbox.h>
  39 #include <gtk/gtkcombo.h>
  40 #include <gtk/gtkentry.h>
  41 #include <gtk/gtkdrawingarea.h>
  42
  43 #include "../display/nr-plain-stuff-gdk.h"
  44 #include <glibmm/i18n.h>
  45
  46 #include "../desktop.h"
  47 #include "font-selector.h"
  48
  49 /* SPFontSelector */
  50
  51 struct SPFontSelector
  52 {
  53     GtkHBox hbox;
  54
  55     unsigned int block_emit : 1;
  56
  57     GtkWidget *family;
  58     GtkWidget *style;
  59     GtkWidget *size;
  60
  61     GtkWidget *family_treeview;
  62     GtkWidget *style_treeview;
  63
  64     NRNameList families;
  65     NRStyleList styles;
  66     int familyidx;
  67     int styleidx;
  68     gfloat fontsize;
  69     bool fontsize_dirty;
  70     font_instance *font;
  71 };
  72
  73
  74 struct SPFontSelectorClass
  75 {
  76     GtkHBoxClass parent_class;
  77
  78     void (* font_set) (SPFontSelector *fsel, font_instance *font);
  79 };
  80
  81 enum {
  82     FONT_SET,
  83     LAST_SIGNAL
  84 };
  85
  86 static void sp_font_selector_class_init         (SPFontSelectorClass    *c);
  87 static void sp_font_selector_init               (SPFontSelector         *fsel);
  88 static void sp_font_selector_destroy            (GtkObject              *object);
  89
  90 static void sp_font_selector_family_select_row  (GtkTreeSelection       *selection,
  91                                                  SPFontSelector         *fsel);
  92
  93 static void sp_font_selector_style_select_row   (GtkTreeSelection       *selection,
  94                                                  SPFontSelector         *fsel);
  95
  96 static void sp_font_selector_size_changed       (GtkComboBox            *combobox,
  97                                                  SPFontSelector         *fsel);
  98
  99 static void sp_font_selector_emit_set           (SPFontSelector         *fsel);
 100
 101 namespace {
 102     const char *sizes[] = {
 103         "4", "6", "8", "9", "10", "11", "12", "13", "14",
 104         "16", "18", "20", "22", "24", "28",
 105         "32", "36", "40", "48", "56", "64", "72", "144",
 106         NULL
 107     };
 108 }
 109
 110 static GtkHBoxClass *fs_parent_class = NULL;
 111 static guint fs_signals[LAST_SIGNAL] = { 0 };
 112
 113 GType sp_font_selector_get_type()
 114 {
 115     static GType type = 0;
 116     if (!type) {
 117         GTypeInfo info = {
 118             sizeof(SPFontSelectorClass),
 119             0, // base_init
 120             0, // base_finalize
 121             (GClassInitFunc)sp_font_selector_class_init,
 122             0, // class_finalize
 123             0, // class_data
 124             sizeof(SPFontSelector),
 125             0, // n_preallocs
 126             (GInstanceInitFunc)sp_font_selector_init,
 127             0 // value_table
 128         };
 129         type = g_type_register_static(GTK_TYPE_HBOX, "SPFontSelector", &info, static_cast<GTypeFlags>(0));
 130     }
 131     return type;
 132 }
 133
 134 static void sp_font_selector_class_init(SPFontSelectorClass *c)
 135 {
 136     GtkObjectClass *object_class = (GtkObjectClass *) c;
 137
 138     fs_parent_class = (GtkHBoxClass* )gtk_type_class(GTK_TYPE_HBOX);
 139
 140     fs_signals[FONT_SET] = gtk_signal_new ("font_set",
 141                                            GTK_RUN_FIRST,
 142                                            GTK_CLASS_TYPE(object_class),
 143                                            GTK_SIGNAL_OFFSET(SPFontSelectorClass, font_set),
 144                                            gtk_marshal_NONE__POINTER,
 145                                            GTK_TYPE_NONE,
 146                                            1, GTK_TYPE_POINTER);
 147
 148     object_class->destroy = sp_font_selector_destroy;
 149 }
 150
 151 static void sp_font_selector_init(SPFontSelector *fsel)
 152 {
 153         gtk_box_set_homogeneous(GTK_BOX(fsel), TRUE);
 154         gtk_box_set_spacing(GTK_BOX(fsel), 4);
 155
 156         /* Family frame */
 157         GtkWidget *f = gtk_frame_new(_("Font family"));
 158         gtk_widget_show (f);
 159         gtk_box_pack_start (GTK_BOX(fsel), f, TRUE, TRUE, 0);
 160
 161         GtkWidget *sw = gtk_scrolled_window_new(NULL, NULL);
 162         gtk_widget_show(sw);
 163         gtk_container_set_border_width(GTK_CONTAINER (sw), 4);
 164         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 165         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
 166         gtk_container_add(GTK_CONTAINER(f), sw);
 167
 168         Inkscape::FontLister* fontlister = Inkscape::FontLister::get_instance();
 169
 170         fsel->family_treeview = gtk_tree_view_new ();
 171         GtkTreeViewColumn *column = gtk_tree_view_column_new ();
 172         GtkCellRenderer *cell = gtk_cell_renderer_text_new ();
 173         gtk_tree_view_column_pack_start (column, cell, FALSE);
 174         gtk_tree_view_column_set_attributes (column, cell, "text", 0, NULL);
 175         gtk_tree_view_append_column (GTK_TREE_VIEW(fsel->family_treeview), column);
 176         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(fsel->family_treeview), FALSE);
 177         Glib::RefPtr<Gtk::ListStore> store = fontlister->get_font_list();
 178         gtk_tree_view_set_model (GTK_TREE_VIEW(fsel->family_treeview), GTK_TREE_MODEL (Glib::unwrap (store)));
 179         gtk_container_add(GTK_CONTAINER(sw), fsel->family_treeview);
 180         gtk_widget_show_all (sw);
 181
 182         GtkTreeSelection *selection = gtk_tree_view_get_selection (GTK_TREE_VIEW(fsel->family_treeview));
 183         g_signal_connect (G_OBJECT(selection), "changed", G_CALLBACK (sp_font_selector_family_select_row), fsel);
 184         g_object_set_data (G_OBJECT(fsel), "family-treeview", fsel->family_treeview);
 185
 186
 187         /* Style frame */
 188         f = gtk_frame_new(_("Style"));
 189         gtk_widget_show(f);
 190         gtk_box_pack_start(GTK_BOX (fsel), f, TRUE, TRUE, 0);
 191
 192         GtkWidget *vb = gtk_vbox_new(FALSE, 4);
 193         gtk_widget_show(vb);
 194         gtk_container_set_border_width(GTK_CONTAINER (vb), 4);
 195         gtk_container_add(GTK_CONTAINER(f), vb);
 196
 197         sw = gtk_scrolled_window_new(NULL, NULL);
 198         gtk_widget_show(sw);
 199         gtk_container_set_border_width(GTK_CONTAINER (sw), 4);
 200         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 201         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
 202         gtk_box_pack_start(GTK_BOX (vb), sw, TRUE, TRUE, 0);
 203
 204         fsel->style_treeview = gtk_tree_view_new ();
 205         column = gtk_tree_view_column_new ();
 206         cell = gtk_cell_renderer_text_new ();
 207         gtk_tree_view_column_pack_start (column, cell, FALSE);
 208         gtk_tree_view_column_set_attributes (column, cell, "text", 0, NULL);
 209         gtk_tree_view_append_column (GTK_TREE_VIEW(fsel->style_treeview), column);
 210         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(fsel->style_treeview), FALSE);
 211         gtk_container_add(GTK_CONTAINER(sw), fsel->style_treeview);
 212         gtk_widget_show_all (sw);
 213
 214         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW(fsel->style_treeview));
 215         g_signal_connect (G_OBJECT(selection), "changed", G_CALLBACK (sp_font_selector_style_select_row), fsel);
 216
 217         GtkWidget *hb = gtk_hbox_new(FALSE, 4);
 218         gtk_widget_show(hb);
 219         gtk_box_pack_start(GTK_BOX(vb), hb, FALSE, FALSE, 0);
 220
 221         fsel->size = gtk_combo_box_entry_new_text ();
 222         gtk_widget_set_size_request(fsel->size, 90, -1);
 223         g_signal_connect (G_OBJECT(fsel->size), "changed", G_CALLBACK (sp_font_selector_size_changed), fsel);
 224         gtk_box_pack_end (GTK_BOX(hb), fsel->size, FALSE, FALSE, 0);
 225
 226         GtkWidget *l = gtk_label_new(_("Font size:"));
 227         gtk_widget_show_all (l);
 228         gtk_box_pack_end(GTK_BOX (hb), l, FALSE, FALSE, 0);
 229
 230         for (unsigned int n = 0; sizes[n]; ++n)
 231             {
 232                 gtk_combo_box_append_text (GTK_COMBO_BOX(fsel->size), sizes[n]);
 233             }
 234
 235         gtk_widget_show_all (fsel->size);
 236
 237         fsel->familyidx = 0;
 238         fsel->styleidx = 0;
 239         fsel->fontsize = 10.0;
 240         fsel->fontsize_dirty = false;
 241         fsel->font = NULL;
 242 }
 243
 244 static void sp_font_selector_destroy(GtkObject *object)
 245 {
 246     SPFontSelector *fsel = SP_FONT_SELECTOR (object);
 247
 248     if (fsel->font) {
 249         fsel->font->Unref();
 250         fsel->font = NULL;
 251     }
 252
 253     if (fsel->families.length > 0) {
 254         nr_name_list_release(&fsel->families);
 255         fsel->families.length = 0;
 256     }
 257
 258     if (fsel->styles.length > 0) {
 259         nr_style_list_release(&fsel->styles);
 260         fsel->styles.length = 0;
 261     }
 262
 263     if (GTK_OBJECT_CLASS(fs_parent_class)->destroy) {
 264         GTK_OBJECT_CLASS(fs_parent_class)->destroy(object);
 265     }
 266 }
 267
 268 static void sp_font_selector_family_select_row(GtkTreeSelection *selection,
 269                                                SPFontSelector *fsel)
 270 {
 271     GtkTreeIter   iter;
 272     GtkTreeModel *model;
 273     GtkListStore *store;
 274     GtkTreePath  *path;
 275     GList        *list=0;
 276
 277     if (!gtk_tree_selection_get_selected (selection, &model, &iter)) return;
 278
 279     path = gtk_tree_model_get_path (model, &iter);
 280     gtk_tree_model_get (model, &iter, 1, &list, -1);
 281     fsel->familyidx = gtk_tree_path_get_indices (path)[0];
 282     fsel->styleidx = 0;
 283
 284     store = gtk_list_store_new (1, G_TYPE_STRING);
 285
 286     for ( ; list ; list = list->next )
 287     {
 288         gtk_list_store_append (store, &iter);
 289         gtk_list_store_set (store, &iter, 0, (char*)list->data, -1);
 290     }
 291
 292     gtk_tree_view_set_model (GTK_TREE_VIEW (fsel->style_treeview), GTK_TREE_MODEL (store));
 293     path = gtk_tree_path_new ();
 294     gtk_tree_path_append_index (path, 0);
 295     gtk_tree_selection_select_path (gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->style_treeview)), path);
 296     gtk_tree_path_free (path);
 297 }
 298
 299 static void sp_font_selector_style_select_row (GtkTreeSelection *selection,
 300                                                SPFontSelector   *fsel)
 301 {
 302     GtkTreeModel *model;
 303     GtkTreePath  *path;
 304     GtkTreeIter   iter;
 305
 306     if (!gtk_tree_selection_get_selected (selection, &model, &iter)) return;
 307
 308     path = gtk_tree_model_get_path (model, &iter);
 309     fsel->styleidx = gtk_tree_path_get_indices (path)[0];
 310
 311     if (!fsel->block_emit)
 312     {
 313         sp_font_selector_emit_set (fsel);
 314     }
 315 }
 316
 317 static void sp_font_selector_size_changed( GtkComboBox */*cbox*/, SPFontSelector *fsel )
 318 {
 319     char *text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (fsel->size));
 320     gfloat old_size = fsel->fontsize;
 321
 322     gchar *endptr;
 323     gdouble value = -1;
 324     if (text) {
 325         value = g_strtod (text, &endptr);
 326         if (endptr == text) // conversion failed, non-numeric input
 327             value = -1;
 328         free (text);
 329     }
 330     if (value <= 0) {
 331         return; // could not parse value
 332     }
 333     if (value > 10000)
 334         value = 10000; // somewhat arbitrary, but text&font preview freezes with too huge fontsizes
 335
 336     fsel->fontsize = value;
 337     if ( fabs(fsel->fontsize-old_size) > 0.001)
 338     {
 339         fsel->fontsize_dirty = true;
 340     }
 341
 342     sp_font_selector_emit_set (fsel);
 343 }
 344
 345 static void sp_font_selector_emit_set (SPFontSelector *fsel)
 346 {
 347     font_instance *font;
 348
 349     GtkTreeSelection *selection_family;
 350     GtkTreeSelection *selection_style;
 351     GtkTreeModel     *model_family;
 352     GtkTreeModel     *model_style;
 353     GtkTreeIter       iter_family;
 354     GtkTreeIter       iter_style;
 355     char             *family=0, *style=0;
 356
 357     //We need to check this here since most GtkTreeModel operations are not atomic
 358     //See GtkListStore documenation, Chapter "Atomic Operations" --mderezynski
 359
 360     model_family = gtk_tree_view_get_model (GTK_TREE_VIEW (fsel->family_treeview));
 361     if (!model_family) return;
 362     model_style = gtk_tree_view_get_model (GTK_TREE_VIEW (fsel->style_treeview));
 363     if (!model_style) return;
 364
 365     selection_family = gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->family_treeview));
 366     selection_style = gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->style_treeview));
 367
 368     if (!gtk_tree_selection_get_selected (selection_family, NULL, &iter_family)) return;
 369     if (!gtk_tree_selection_get_selected (selection_style, NULL, &iter_style)) return;
 370
 371     gtk_tree_model_get (model_family, &iter_family, 0, &family, -1);
 372     gtk_tree_model_get (model_style, &iter_style, 0, &style, -1);
 373
 374     if ((!family) || (!style)) return;
 375
 376     font = (font_factory::Default())->FaceFromUIStrings (family, style);
 377
 378     // FIXME: when a text object uses non-available font, font==NULL and we can't set size
 379     // (and the size shown in the widget is invalid). To fix, here we must always get some
 380     // default font, exactly the same as sptext uses for on-canvas display, so that
 381     // font!=NULL ever.
 382     if (font != fsel->font || ( font && fsel->fontsize_dirty ) ) {
 383         if ( font ) {
 384             font->Ref();
 385         }
 386         if ( fsel->font ) {
 387             fsel->font->Unref();
 388         }
 389         fsel->font = font;
 390         gtk_signal_emit(GTK_OBJECT(fsel), fs_signals[FONT_SET], fsel->font);
 391     }
 392     fsel->fontsize_dirty = false;
 393     if (font) {
 394         font->Unref();
 395     }
 396     font = NULL;
 397 }
 398
 399 GtkWidget *sp_font_selector_new()
 400 {
 401     SPFontSelector *fsel = (SPFontSelector*) gtk_type_new(SP_TYPE_FONT_SELECTOR);
 402
 403     return (GtkWidget *) fsel;
 404 }
 405
 406 void sp_font_selector_set_font (SPFontSelector *fsel, font_instance *font, double size)
 407 {
 408     if (font)
 409     {
 410         Gtk::TreePath path;
 411         font_instance *tempFont = NULL;
 412
 413         Glib::ustring family = font_factory::Default()->GetUIFamilyString(font->descr);
 414
 415         try {
 416             path = Inkscape::FontLister::get_instance()->get_row_for_font (family);
 417         } catch (...) {
 418             return;
 419         }
 420
 421         fsel->block_emit = TRUE;
 422         gtk_tree_selection_select_path (gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->family_treeview)), path.gobj());
 423         gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (fsel->family_treeview), path.gobj(), NULL, TRUE, 0.5, 0.5);
 424         fsel->block_emit = FALSE;
 425
 426         GList *list = 0;
 427         GtkTreeIter iter;
 428         GtkTreeModel *model = gtk_tree_view_get_model (GTK_TREE_VIEW(fsel->family_treeview));
 429         gtk_tree_model_get_iter (model, &iter, path.gobj());
 430         gtk_tree_model_get (model, &iter, 1, &list, -1);
 431
 432         unsigned int currentStyleNumber = 0;
 433         unsigned int bestStyleNumber = 0;
 434
 435         PangoFontDescription *incomingFont = pango_font_description_copy(font->descr);
 436         pango_font_description_unset_fields(incomingFont, PANGO_FONT_MASK_SIZE);
 437
 438         char *incomingFontString = pango_font_description_to_string(incomingFont);
 439
 440         tempFont = (font_factory::Default())->FaceFromUIStrings(family.c_str(), (char*)list->data);
 441
 442         PangoFontDescription *bestMatchForFont = NULL;
 443         if (tempFont) {
 444             bestMatchForFont = pango_font_description_copy(tempFont->descr);
 445             tempFont->Unref();
 446             tempFont = NULL;
 447         }
 448
 449         pango_font_description_unset_fields(bestMatchForFont, PANGO_FONT_MASK_SIZE);
 450
 451         list = list->next;
 452
 453         while (list) {
 454             currentStyleNumber++;
 455
 456             tempFont = font_factory::Default()->FaceFromUIStrings(family.c_str(), (char*)list->data);
 457
 458             PangoFontDescription *currentMatchForFont = NULL;
 459             if (tempFont) {
 460                 currentMatchForFont = pango_font_description_copy(tempFont->descr);
 461                 tempFont->Unref();
 462                 tempFont = NULL;
 463             }
 464
 465             if (currentMatchForFont) {
 466                 pango_font_description_unset_fields(currentMatchForFont, PANGO_FONT_MASK_SIZE);
 467
 468                 char *currentMatchString = pango_font_description_to_string(currentMatchForFont);
 469
 470                 if (!strcmp(incomingFontString, currentMatchString)
 471                         || pango_font_description_better_match(incomingFont, bestMatchForFont, currentMatchForFont)) {
 472                     // Found a better match for the font we are looking for
 473                     pango_font_description_free(bestMatchForFont);
 474                     bestMatchForFont = pango_font_description_copy(currentMatchForFont);
 475                     bestStyleNumber = currentStyleNumber;
 476                 }
 477
 478                 g_free(currentMatchString);
 479
 480                 pango_font_description_free(currentMatchForFont);
 481             }
 482
 483             list = list->next;
 484         }
 485
 486         if (bestMatchForFont)
 487             pango_font_description_free(bestMatchForFont);
 488         if (incomingFont)
 489             pango_font_description_free(incomingFont);
 490         g_free(incomingFontString);
 491
 492         GtkTreePath *path_c = gtk_tree_path_new ();
 493         gtk_tree_path_append_index (path_c, bestStyleNumber);
 494         gtk_tree_selection_select_path (gtk_tree_view_get_selection (GTK_TREE_VIEW (fsel->style_treeview)), path_c);
 495         gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (fsel->style_treeview), path_c, NULL, TRUE, 0.5, 0.5);
 496
 497         if (size != fsel->fontsize)
 498         {
 499             gchar s[8];
 500             g_snprintf (s, 8, "%.5g", size); // UI, so printf is ok
 501             gtk_entry_set_text (GTK_ENTRY (GTK_BIN(fsel->size)->child), s);
 502             fsel->fontsize = size;
 503         }
 504     }
 505
 506 }
 507
 508 font_instance* sp_font_selector_get_font(SPFontSelector *fsel)
 509 {
 510     if (fsel->font) {
 511         fsel->font->Ref();
 512     }
 513
 514     return fsel->font;
 515 }
 516
 517 double sp_font_selector_get_size(SPFontSelector *fsel)
 518 {
 519     return fsel->fontsize;
 520 }
 521
 522 /* SPFontPreview */
 523
 524 struct SPFontPreview
 525 {
 526     GtkDrawingArea darea;
 527
 528     font_instance *font;
 529     raster_font *rfont;
 530     gchar *phrase;
 531     unsigned long rgba;
 532 };
 533
 534 struct SPFontPreviewClass
 535 {
 536     GtkDrawingAreaClass parent_class;
 537 };
 538
 539 static void sp_font_preview_class_init(SPFontPreviewClass *c);
 540 static void sp_font_preview_init(SPFontPreview *fsel);
 541 static void sp_font_preview_destroy(GtkObject *object);
 542
 543 void sp_font_preview_size_request(GtkWidget *widget, GtkRequisition *req);
 544 static gint sp_font_preview_expose(GtkWidget *widget, GdkEventExpose *event);
 545
 546 static GtkDrawingAreaClass *fp_parent_class = NULL;
 547
 548 GType sp_font_preview_get_type()
 549 {
 550     static GType type = 0;
 551     if (!type) {
 552         GTypeInfo info = {
 553             sizeof(SPFontPreviewClass),
 554             0, // base_init
 555             0, // base_finalize
 556             (GClassInitFunc)sp_font_preview_class_init,
 557             0, // class_finalize
 558             0, // class_data
 559             sizeof(SPFontPreview),
 560             0, // n_preallocs
 561             (GInstanceInitFunc)sp_font_preview_init,
 562             0 // value_table
 563         };
 564         type = g_type_register_static(GTK_TYPE_DRAWING_AREA, "SPFontPreview", &info, static_cast<GTypeFlags>(0));
 565     }
 566     return type;
 567 }
 568
 569 static void sp_font_preview_class_init (SPFontPreviewClass *c)
 570 {
 571     GtkObjectClass *object_class = (GtkObjectClass *) c;
 572     GtkWidgetClass *widget_class = (GtkWidgetClass *) c;
 573
 574     fp_parent_class = (GtkDrawingAreaClass*) gtk_type_class(GTK_TYPE_DRAWING_AREA);
 575
 576     object_class->destroy = sp_font_preview_destroy;
 577
 578     widget_class->size_request = sp_font_preview_size_request;
 579     widget_class->expose_event = sp_font_preview_expose;
 580 }
 581
 582 static void sp_font_preview_init(SPFontPreview *fprev)
 583 {
 584     fprev->rgba = 0x000000ff;
 585 }
 586
 587 static void sp_font_preview_destroy(GtkObject *object)
 588 {
 589     SPFontPreview *fprev = SP_FONT_PREVIEW (object);
 590
 591     if (fprev->rfont) {
 592         fprev->rfont->Unref();
 593         fprev->rfont = NULL;
 594     }
 595
 596     if (fprev->font) {
 597         fprev->font->Unref();
 598         fprev->font = NULL;
 599     }
 600
 601     g_free(fprev->phrase);
 602     fprev->phrase = NULL;
 603
 604     if (GTK_OBJECT_CLASS (fp_parent_class)->destroy) {
 605         GTK_OBJECT_CLASS (fp_parent_class)->destroy(object);
 606     }
 607 }
 608
 609 void sp_font_preview_size_request(GtkWidget */*widget*/, GtkRequisition *req)
 610 {
 611     req->width = 256;
 612     req->height = 32;
 613 }
 614
 615 #define SPFP_MAX_LEN 64
 616
 617 static gint sp_font_preview_expose(GtkWidget *widget, GdkEventExpose *event)
 618 {
 619     SPFontPreview *fprev = SP_FONT_PREVIEW(widget);
 620
 621     if (GTK_WIDGET_DRAWABLE (widget)) {
 622         if (fprev->rfont) {
 623
 624             int glyphs[SPFP_MAX_LEN];
 625             double hpos[SPFP_MAX_LEN];
 626
 627             font_instance *tface = fprev->rfont->daddy;
 628
 629             double theSize = NR::expansion(fprev->rfont->style.transform);
 630
 631             gchar const *p;
 632             if (fprev->phrase) {
 633                 p = fprev->phrase;
 634             } else {
 635                 /* TRANSLATORS: Test string used in text and font dialog (when no
 636                  * text has been entered) to get a preview of the font.  Choose
 637                  * some representative characters that users of your locale will be
 638                  * interested in. */
 639                 p = _("AaBbCcIiPpQq12369$\342\202\254\302\242?.;/()");
 640             }
 641             int len = 0;
 642
 643             NRRect bbox;
 644             bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0.0;
 645
 646             text_wrapper* str_text=new text_wrapper;
 647             str_text->SetDefaultFont(tface);
 648             str_text->AppendUTF8(p,-1);
 649             if ( str_text->uni32_length > 0 ) {
 650                 str_text->DoLayout();
 651                 if ( str_text->glyph_length > 0 ) {
 652                     PangoFont *curPF = NULL;
 653                     font_instance *curF = NULL;
 654                     for (int i = 0; i < str_text->glyph_length && i < SPFP_MAX_LEN; i++) {
 655                         if ( str_text->glyph_text[i].font != curPF ) {
 656                             curPF = str_text->glyph_text[i].font;
 657                             if (curF) {
 658                                 curF->Unref();
 659                             }
 660                             curF = NULL;
 661                             if ( curPF ) {
 662                                 PangoFontDescription* pfd = pango_font_describe(curPF);
 663                                 curF = (font_factory::Default())->Face(pfd);
 664                                 pango_font_description_free(pfd);
 665                             }
 666                         }
 667                         Geom::Point base_pt(str_text->glyph_text[i].x, str_text->glyph_text[i].y);
 668                         base_pt *= theSize;
 669
 670                         glyphs[len] = str_text->glyph_text[i].gl;
 671                         hpos[len] = base_pt[0];
 672                         len++;
 673                         if ( curF ) {
 674                             boost::optional<NR::Rect> nbbox = curF->BBox(str_text->glyph_text[i].gl);
 675                             if (nbbox) {
 676                                 bbox.x0 = MIN(bbox.x0, base_pt[Geom::X] + theSize * (nbbox->min())[0]);
 677                                 bbox.y0 = MIN(bbox.y0, base_pt[Geom::Y] - theSize * (nbbox->max())[1]);
 678                                 bbox.x1 = MAX(bbox.x1, base_pt[Geom::X] + theSize * (nbbox->max())[0]);
 679                                 bbox.y1 = MAX(bbox.y1, base_pt[Geom::Y] - theSize * (nbbox->min())[1]);
 680                             }
 681                         }
 682                     }
 683                     if ( curF ) {
 684                         curF->Unref();
 685                     }
 686                 }
 687             }
 688
 689             // XXX: FIXME: why does this code ignore adv.y
 690             /*                  while (p && *p && (len < SPFP_MAX_LEN)) {
 691                                 unsigned int unival;
 692                                 NRRect gbox;
 693                                 unival = g_utf8_get_char (p);
 694                                 glyphs[len] =  tface->MapUnicodeChar( unival);
 695                                 hpos[len] = (int)px;
 696                                 Geom::Point adv = fprev->rfont->Advance(glyphs[len]);
 697                                 fprev->rfont->BBox( glyphs[len], &gbox);
 698                                 bbox.x0 = MIN (px + gbox.x0, bbox.x0);
 699                                 bbox.y0 = MIN (py + gbox.y0, bbox.y0);
 700                                 bbox.x1 = MAX (px + gbox.x1, bbox.x1);
 701                                 bbox.y1 = MAX (py + gbox.y1, bbox.y1);
 702                                 px += adv[Geom::X];
 703                                 len += 1;
 704                                 p = g_utf8_next_char (p);
 705                                 }*/
 706
 707             float startx = (widget->allocation.width - (bbox.x1 - bbox.x0)) / 2;
 708             float starty = widget->allocation.height - (widget->allocation.height - (bbox.y1 - bbox.y0)) / 2 - bbox.y1;
 709
 710             for (int y = event->area.y; y < event->area.y + event->area.height; y += 64) {
 711                 for (int x = event->area.x; x < event->area.x + event->area.width; x += 64) {
 712                     NRPixBlock pb, m;
 713                     int x0 = x;
 714                     int y0 = y;
 715                     int x1 = MIN(x0 + 64, event->area.x + event->area.width);
 716                     int y1 = MIN(y0 + 64, event->area.y + event->area.height);
 717                     guchar *ps = nr_pixelstore_16K_new (TRUE, 0xff);
 718                     nr_pixblock_setup_extern(&pb, NR_PIXBLOCK_MODE_R8G8B8, x0, y0, x1, y1, ps, 3 * (x1 - x0), FALSE, FALSE);
 719                     nr_pixblock_setup_fast(&m, NR_PIXBLOCK_MODE_A8, x0, y0, x1, y1, TRUE);
 720                     pb.empty = FALSE;
 721
 722                     PangoFont *curPF = NULL;
 723                     font_instance *curF = NULL;
 724                     raster_font *curRF = NULL;
 725                     for (int i=0; i < len; i++) {
 726                         if ( str_text->glyph_text[i].font != curPF ) {
 727                             curPF=str_text->glyph_text[i].font;
 728                             if ( curF ) {
 729                                 curF->Unref();
 730                             }
 731                             curF = NULL;
 732                             if ( curPF ) {
 733                                 PangoFontDescription* pfd = pango_font_describe(curPF);
 734                                 curF=(font_factory::Default())->Face(pfd);
 735                                 pango_font_description_free(pfd);
 736                             }
 737                             if ( curF ) {
 738                                 if ( curRF ) {
 739                                     curRF->Unref();
 740                                 }
 741                                 curRF = NULL;
 742                                 curRF = curF->RasterFont(fprev->rfont->style);
 743                             }
 744                         }
 745                         raster_glyph *g = (curRF) ? curRF->GetGlyph(glyphs[i]) : NULL;
 746                         if ( g ) {
 747                             g->Blit(Geom::Point(hpos[i] + startx, starty), m);
 748                         }
 749                     }
 750                     if (curRF) {
 751                         curRF->Unref();
 752                     }
 753                     if (curF) {
 754                         curF->Unref();
 755                     }
 756
 757                     nr_blit_pixblock_mask_rgba32(&pb, &m, fprev->rgba);
 758                     gdk_draw_rgb_image(widget->window, widget->style->black_gc,
 759                                        x0, y0, x1 - x0, y1 - y0,
 760                                        GDK_RGB_DITHER_NONE, NR_PIXBLOCK_PX (&pb), pb.rs);
 761                     nr_pixblock_release(&m);
 762                     nr_pixblock_release(&pb);
 763                     nr_pixelstore_16K_free(ps);
 764                 }
 765             }
 766
 767             delete str_text;
 768
 769         } else {
 770             nr_gdk_draw_gray_garbage(widget->window, widget->style->black_gc,
 771                                      event->area.x, event->area.y,
 772                                      event->area.width, event->area.height);
 773         }
 774     }
 775
 776     return TRUE;
 777 }
 778
 779 GtkWidget * sp_font_preview_new()
 780 {
 781     GtkWidget *w = (GtkWidget*) gtk_type_new(SP_TYPE_FONT_PREVIEW);
 782
 783     return w;
 784 }
 785
 786 void sp_font_preview_set_font(SPFontPreview *fprev, font_instance *font, SPFontSelector *fsel)
 787 {
 788         if (font)
 789         {
 790             font->Ref();
 791         }
 792
 793         if (fprev->font)
 794         {
 795             fprev->font->Unref();
 796         }
 797
 798         fprev->font = font;
 799
 800         if (fprev->rfont)
 801         {
 802             fprev->rfont->Unref();
 803             fprev->rfont=NULL;
 804         }
 805
 806         if (fprev->font)
 807         {
 808             Geom::Matrix flip(Geom::Scale(fsel->fontsize, -fsel->fontsize));
 809             fprev->rfont = fprev->font->RasterFont(flip, 0);
 810         }
 811
 812         if (GTK_WIDGET_DRAWABLE (fprev)) gtk_widget_queue_draw (GTK_WIDGET (fprev));
 813 }
 814
 815 void sp_font_preview_set_rgba32(SPFontPreview *fprev, guint32 rgba)
 816 {
 817     fprev->rgba = rgba;
 818     if (GTK_WIDGET_DRAWABLE (fprev)) {
 819         gtk_widget_queue_draw (GTK_WIDGET (fprev));
 820     }
 821 }
 822
 823 void sp_font_preview_set_phrase(SPFontPreview *fprev, const gchar *phrase)
 824 {
 825     g_free (fprev->phrase);
 826     if (phrase) {
 827         fprev->phrase = g_strdup (phrase);
 828     } else {
 829         fprev->phrase = NULL;
 830     }
 831     if (GTK_WIDGET_DRAWABLE(fprev)) {
 832         gtk_widget_queue_draw (GTK_WIDGET (fprev));
 833     }
 834 }
 835
 836
 837 /*
 838   Local Variables:
 839   mode:c++
 840   c-file-style:"stroustrup"
 841   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 842   indent-tabs-mode:nil
 843   fill-column:99
 844   End:
 845 */
 846 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :