src/printing.c

   1 /* Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   2  * Copyright (C) 2007 Holger Berndt <hb@claws-mail.org>,
   3  * Colin Leroy <colin@colino.net>, and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "printing.h"
  25 #include "image_viewer.h"
  26
  27 #if GTK_CHECK_VERSION(2,10,0) && !defined(USE_GNOMEPRINT)
  28
  29 #include "gtkutils.h"
  30 #include "toolbar.h"
  31 #include "prefs_common.h"
  32
  33 #include <glib/gi18n.h>
  34 #include <gdk/gdkkeysyms.h>
  35 #include <gtk/gtk.h>
  36 #include <pango/pango.h>
  37 #include <string.h>
  38 #include <math.h>
  39
  40 typedef struct {
  41   PangoLayout *layout;
  42   PangoContext *pango_context;
  43   char *text;
  44   GList *page_breaks;
  45   guint npages;
  46   GtkTextBuffer *buffer;
  47   gint sel_start;
  48   gint sel_end;
  49   GHashTable *images;
  50   gint img_cnt;
  51   gdouble zoom;
  52 } PrintData;
  53
  54 typedef struct {
  55   GtkPrintOperation *op;
  56   GtkPrintOperationPreview *preview;
  57   GtkWidget         *dialog;
  58   GtkWidget         *scrolled_window;
  59   GtkWidget         *area;
  60   PrintData         *print_data;
  61   GtkWidget         *page_nr_label;
  62   GList             *pages_to_print;
  63   GList             *current_page;
  64   GtkWidget *first;
  65   GtkWidget *next;
  66   GtkWidget *previous;
  67   GtkWidget *last;
  68   GtkWidget *close;
  69   GtkWidget *zoom_100;
  70   GtkWidget *zoom_fit;
  71   GtkWidget *zoom_in;
  72   GtkWidget *zoom_out;
  73   gboolean rendering;
  74   gint page_width;
  75   gint page_height;
  76 } PreviewData;
  77
  78 /* callbacks */
  79 static void     cb_begin_print(GtkPrintOperation*, GtkPrintContext*, gpointer);
  80 static void     cb_draw_page(GtkPrintOperation*, GtkPrintContext*, gint,
  81                              gpointer);
  82 static gboolean cb_preview(GtkPrintOperation*, GtkPrintOperationPreview*,
  83                            GtkPrintContext*, GtkWindow*, gpointer);
  84 static void     cb_preview_destroy(GtkWindow*, gpointer);
  85 static gboolean cb_preview_close(GtkWidget*, GdkEventAny*, gpointer);
  86 static void     cb_preview_size_allocate(GtkWidget*, GtkAllocation*);
  87 static void     cb_preview_ready(GtkPrintOperationPreview*,
  88                                  GtkPrintContext*, gpointer);
  89 static gboolean cb_preview_expose(GtkWidget*, GdkEventExpose*, gpointer);
  90 static void     cb_preview_got_page_size(GtkPrintOperationPreview*,
  91                                          GtkPrintContext*,
  92                                          GtkPageSetup*, gpointer);
  93 static void     cb_preview_go_first(GtkButton*, gpointer);
  94 static void     cb_preview_go_previous(GtkButton*, gpointer);
  95 static void     cb_preview_go_next(GtkButton*, gpointer);
  96 static void     cb_preview_go_last(GtkButton*, gpointer);
  97 static void     cb_preview_btn_close(GtkButton*, gpointer);
  98 static void     cb_preview_zoom_100(GtkButton*, gpointer);
  99 static void     cb_preview_zoom_fit(GtkButton*, gpointer);
 100 static void     cb_preview_zoom_in(GtkButton*, gpointer);
 101 static void     cb_preview_zoom_out(GtkButton*, gpointer);
 102 static void     cb_preview_request_page_setup(GtkPrintOperation*,
 103                                               GtkPrintContext*,
 104                                               gint,GtkPageSetup*,gpointer);
 105
 106 static void     printing_preview_update_zoom_sensitivity(PreviewData*);
 107
 108 /* variables */
 109 static GtkPrintSettings *settings   = NULL;
 110 static GtkPageSetup     *page_setup = NULL;
 111
 112 /* other static functions */
 113 static void     printing_layout_set_text_attributes(PrintData*, GtkPrintContext *);
 114 static gboolean printing_is_pango_gdk_color_equal(PangoColor*, GdkColor*);
 115 static gint     printing_text_iter_get_offset_bytes(PrintData *, const GtkTextIter*);
 116
 117 #define PREVIEW_SCALE 72
 118 #define PREVIEW_SHADOW_OFFSET 3
 119 #define PREVIEW_ZOOM_FAC 1.41
 120 #define PREVIEW_ZOOM_MAX 10.
 121 #define PREVIEW_ZOOM_MIN 0.2
 122
 123 static void free_pixbuf(gpointer key, gpointer value, gpointer data)
 124 {
 125   PangoAttrShape *attr = (PangoAttrShape *) value;
 126   g_object_unref(G_OBJECT(attr->data));
 127 }
 128
 129 void printing_print(GtkTextView *text_view, GtkWindow *parent, gint sel_start, gint sel_end)
 130 {
 131   GtkPrintOperation *op;
 132   GtkPrintOperationResult res;
 133   PrintData *print_data;
 134   GtkTextIter start, end;
 135   GtkTextBuffer *buffer;
 136
 137   op = gtk_print_operation_new();
 138
 139   print_data = g_new0(PrintData,1);
 140
 141   print_data->zoom = 1.;
 142
 143   print_data->images = g_hash_table_new(g_direct_hash, g_direct_equal);
 144   print_data->pango_context=gtk_widget_get_pango_context(GTK_WIDGET(text_view));
 145
 146   /* get text */
 147   buffer = gtk_text_view_get_buffer(text_view);
 148   print_data->buffer = buffer;
 149   print_data->sel_start = sel_start;
 150   print_data->sel_end = sel_end;
 151   if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
 152     gtk_text_buffer_get_start_iter(buffer, &start);
 153     gtk_text_buffer_get_end_iter(buffer, &end);
 154   } else {
 155     gtk_text_buffer_get_iter_at_offset(buffer, &start, print_data->sel_start);
 156     gtk_text_buffer_get_iter_at_offset(buffer, &end, print_data->sel_end);
 157   }
 158
 159   print_data->text = gtk_text_buffer_get_text(buffer, &start, &end, FALSE);
 160
 161   if (settings == NULL) {
 162     settings = gtk_print_settings_new();
 163     gtk_print_settings_set_use_color(settings, prefs_common.print_use_color);
 164     gtk_print_settings_set_collate(settings, prefs_common.print_use_collate);
 165     gtk_print_settings_set_reverse(settings, prefs_common.print_use_reverse);
 166     gtk_print_settings_set_duplex(settings, prefs_common.print_use_duplex);
 167   }
 168   if (page_setup == NULL) {
 169     page_setup = gtk_page_setup_new();
 170     if (prefs_common.print_paper_type && *prefs_common.print_paper_type) {
 171       GtkPaperSize *paper = gtk_paper_size_new(prefs_common.print_paper_type);
 172       gtk_page_setup_set_paper_size(page_setup, paper);
 173       gtk_paper_size_free(paper);
 174     }
 175     gtk_page_setup_set_orientation(page_setup, prefs_common.print_paper_orientation);
 176   }
 177
 178   /* Config for printing */
 179   gtk_print_operation_set_print_settings(op, settings);
 180   gtk_print_operation_set_default_page_setup(op, page_setup);
 181
 182   /* signals */
 183   g_signal_connect(op, "begin_print", G_CALLBACK(cb_begin_print), print_data);
 184   g_signal_connect(op, "draw_page", G_CALLBACK(cb_draw_page), print_data);
 185   g_signal_connect(op, "preview", G_CALLBACK(cb_preview), print_data);
 186
 187   /* Start printing process */
 188   res = gtk_print_operation_run(op, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
 189                                 parent, NULL);
 190
 191   if(res == GTK_PRINT_OPERATION_RESULT_ERROR) {
 192     GError *error = NULL;
 193     gtk_print_operation_get_error(op, &error);
 194     debug_print("Error printing message: %s",
 195             error ? error->message : "no details");
 196   }
 197   else if(res == GTK_PRINT_OPERATION_RESULT_APPLY) {
 198     /* store settings for next printing session */
 199     if(settings != NULL)
 200       g_object_unref(settings);
 201     settings = g_object_ref(gtk_print_operation_get_print_settings(op));
 202     prefs_common.print_use_color = gtk_print_settings_get_use_color(settings);
 203     prefs_common.print_use_collate = gtk_print_settings_get_collate(settings);
 204     prefs_common.print_use_reverse = gtk_print_settings_get_reverse(settings);
 205     prefs_common.print_use_duplex = gtk_print_settings_get_duplex(settings);
 206   }
 207
 208   g_hash_table_foreach(print_data->images, free_pixbuf, NULL);
 209   g_hash_table_destroy(print_data->images);
 210   if(print_data->text)
 211     g_free(print_data->text);
 212   g_list_free(print_data->page_breaks);
 213   if(print_data->layout)
 214     g_object_unref(print_data->layout);
 215
 216   g_free(print_data);
 217
 218   g_object_unref(op);
 219   debug_print("printing_print finished\n");
 220 }
 221
 222 void printing_page_setup(GtkWindow *parent)
 223 {
 224   GtkPageSetup *new_page_setup;
 225
 226   if(settings == NULL) {
 227     settings = gtk_print_settings_new();
 228     gtk_print_settings_set_use_color(settings, prefs_common.print_use_color);
 229     gtk_print_settings_set_collate(settings, prefs_common.print_use_collate);
 230     gtk_print_settings_set_reverse(settings, prefs_common.print_use_reverse);
 231     gtk_print_settings_set_duplex(settings, prefs_common.print_use_duplex);
 232   }
 233   if (page_setup == NULL) {
 234     page_setup = gtk_page_setup_new();
 235     if (prefs_common.print_paper_type && *prefs_common.print_paper_type) {
 236       GtkPaperSize *paper = gtk_paper_size_new(prefs_common.print_paper_type);
 237       gtk_page_setup_set_paper_size(page_setup, paper);
 238       gtk_paper_size_free(paper);
 239     }
 240     gtk_page_setup_set_orientation(page_setup, prefs_common.print_paper_orientation);
 241   }
 242
 243   new_page_setup = gtk_print_run_page_setup_dialog(parent,page_setup,settings);
 244
 245   if(page_setup)
 246     g_object_unref(page_setup);
 247
 248   page_setup = new_page_setup;
 249
 250   g_free(prefs_common.print_paper_type);
 251   prefs_common.print_paper_type = g_strdup(gtk_paper_size_get_name(
 252                 gtk_page_setup_get_paper_size(page_setup)));
 253   prefs_common.print_paper_orientation = gtk_page_setup_get_orientation(page_setup);
 254 }
 255
 256 static gboolean cb_preview(GtkPrintOperation        *operation,
 257                            GtkPrintOperationPreview *preview,
 258                            GtkPrintContext          *context,
 259                            GtkWindow                *parent,
 260                            gpointer                 data)
 261 {
 262   PrintData *print_data;
 263   cairo_t *cr;
 264   PreviewData *preview_data;
 265   GtkWidget *vbox;
 266   GtkWidget *toolbar;
 267   GtkWidget *da;
 268   GtkWidget *sw;
 269   GtkWidget *page;
 270   GtkToolItem *separator;
 271   static GdkGeometry geometry;
 272   GtkWidget *dialog = NULL;
 273   GtkTooltips *toolbar_tips = gtk_tooltips_new();
 274   GtkWidget *statusbar = gtk_hbox_new(2, FALSE);
 275   debug_print("Creating internal print preview\n");
 276
 277   print_data = (PrintData*) data;
 278
 279   preview_data = g_new0(PreviewData,1);
 280   preview_data->print_data = print_data;
 281   preview_data->op = g_object_ref(operation);
 282   preview_data->preview = preview;
 283
 284   /* Window */
 285   dialog = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "print_preview");
 286   preview_data->dialog = dialog;
 287   if(!geometry.min_height) {
 288     geometry.min_width = 600;
 289     geometry.min_height = 400;
 290   }
 291   gtk_window_set_geometry_hints(GTK_WINDOW(dialog), NULL, &geometry,
 292                                 GDK_HINT_MIN_SIZE);
 293   gtk_widget_set_size_request(dialog, prefs_common.print_previewwin_width,
 294                               prefs_common.print_previewwin_height);
 295   gtk_window_set_title(GTK_WINDOW(dialog), _("Print preview"));
 296
 297   /* vbox */
 298   vbox = gtk_vbox_new(FALSE, 0);
 299   gtk_container_add(GTK_CONTAINER(dialog), vbox);
 300
 301   /* toolbar */
 302   toolbar = gtk_toolbar_new();
 303   gtk_toolbar_set_orientation(GTK_TOOLBAR(toolbar), GTK_ORIENTATION_HORIZONTAL);
 304   switch (prefs_common.toolbar_style) {
 305   case TOOLBAR_ICON:
 306     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS);
 307     break;
 308   case TOOLBAR_TEXT:
 309     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_TEXT);
 310     break;
 311   case TOOLBAR_BOTH_HORIZ:
 312     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH_HORIZ);
 313     break;
 314   case TOOLBAR_BOTH:
 315   default:
 316     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH);
 317   }
 318   gtk_toolbar_set_show_arrow(GTK_TOOLBAR(toolbar), TRUE);
 319
 320   gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0);
 321
 322 #define TOOLBAR_ITEM(item,text,tooltip,cb,cbdata) {                                                             \
 323         item = GTK_WIDGET(gtk_tool_button_new_from_stock(text));                                        \
 324         gtk_tool_item_set_homogeneous(GTK_TOOL_ITEM(item), FALSE);                                      \
 325         gtk_tool_item_set_is_important(GTK_TOOL_ITEM(item), TRUE);                                      \
 326         gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(item), -1);                              \
 327         g_signal_connect (G_OBJECT(item), "clicked", G_CALLBACK(cb), cbdata);                           \
 328         gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(item), GTK_TOOLTIPS(toolbar_tips),                      \
 329                         tooltip, NULL);                                                                 \
 330 }
 331
 332   TOOLBAR_ITEM(preview_data->first, GTK_STOCK_GOTO_FIRST, _("First page"), cb_preview_go_first, preview_data);
 333   TOOLBAR_ITEM(preview_data->previous, GTK_STOCK_GO_BACK, _("Previous page"), cb_preview_go_previous, preview_data);
 334
 335   page = gtk_label_new("");
 336   gtk_widget_set_size_request(page, 100, -1);
 337   preview_data->page_nr_label = page;
 338
 339   TOOLBAR_ITEM(preview_data->next, GTK_STOCK_GO_FORWARD, _("Next page"), cb_preview_go_next, preview_data);
 340   TOOLBAR_ITEM(preview_data->last, GTK_STOCK_GOTO_LAST, _("Last page"), cb_preview_go_last, preview_data);
 341
 342   separator = gtk_separator_tool_item_new();
 343   gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1);
 344
 345   TOOLBAR_ITEM(preview_data->zoom_100, GTK_STOCK_ZOOM_100, _("Zoom 100%"), cb_preview_zoom_100, preview_data);
 346   TOOLBAR_ITEM(preview_data->zoom_fit, GTK_STOCK_ZOOM_FIT, _("Zoom fit"), cb_preview_zoom_fit, preview_data);
 347   TOOLBAR_ITEM(preview_data->zoom_in, GTK_STOCK_ZOOM_IN, _("Zoom in"), cb_preview_zoom_in, preview_data);
 348   TOOLBAR_ITEM(preview_data->zoom_out, GTK_STOCK_ZOOM_OUT, _("Zoom out"), cb_preview_zoom_out, preview_data);
 349
 350   separator = gtk_separator_tool_item_new();
 351   gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1);
 352
 353   /* tooltip has to be NULL else it triggers an expose_event */
 354   TOOLBAR_ITEM(preview_data->close, GTK_STOCK_CLOSE, NULL, cb_preview_btn_close, preview_data);
 355
 356   gtk_widget_show(statusbar);
 357   gtk_box_pack_start(GTK_BOX(vbox), statusbar, FALSE, FALSE, 0);
 358   gtk_box_pack_start(GTK_BOX(statusbar), page, FALSE, FALSE, 0);
 359   /* Drawing area */
 360   sw = gtk_scrolled_window_new(NULL, NULL);
 361   gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
 362                                  GTK_POLICY_AUTOMATIC,
 363                                  GTK_POLICY_AUTOMATIC);
 364   gtk_box_pack_start(GTK_BOX(vbox), sw, TRUE, TRUE, 0);
 365   da = gtk_drawing_area_new();
 366   gtk_widget_set_double_buffered(da, FALSE);
 367   gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw),
 368                                         da);
 369   gtk_widget_realize(da);
 370   preview_data->scrolled_window = sw;
 371   preview_data->area = da;
 372
 373   /* cairo context */
 374   cr = gdk_cairo_create(da->window);
 375   gtk_print_context_set_cairo_context(context, cr, PREVIEW_SCALE, PREVIEW_SCALE);
 376   cairo_destroy(cr);
 377
 378   /* signals */
 379   g_signal_connect(dialog, "key_press_event",
 380                    G_CALLBACK(cb_preview_close), preview_data);
 381   g_signal_connect(dialog, "size_allocate",
 382                    G_CALLBACK(cb_preview_size_allocate), NULL);
 383   g_signal_connect(dialog, "destroy",G_CALLBACK(cb_preview_destroy),
 384                    preview_data);
 385   g_signal_connect(preview, "ready", G_CALLBACK(cb_preview_ready),
 386                    preview_data);
 387   g_signal_connect(preview, "got-page-size",
 388                    G_CALLBACK(cb_preview_got_page_size), preview_data);
 389
 390   g_signal_connect(operation, "request-page-setup",
 391                    G_CALLBACK(cb_preview_request_page_setup), preview_data);
 392
 393   gtk_widget_show_all(dialog);
 394   return TRUE;
 395 }
 396
 397 static void cb_preview_destroy(GtkWindow *window, gpointer data)
 398 {
 399   PreviewData *preview_data;
 400   preview_data = (PreviewData*) data;
 401
 402   if (preview_data->rendering)
 403     return;
 404   debug_print("Preview window destroyed\n");
 405
 406   gtk_print_operation_preview_end_preview(preview_data->preview);
 407   g_object_unref(preview_data->op);
 408   g_list_free(preview_data->pages_to_print);
 409
 410   g_free(preview_data);
 411 }
 412
 413 static gboolean cb_preview_close(GtkWidget *widget, GdkEventAny *event,
 414                                  gpointer data)
 415 {
 416   PreviewData *preview_data = (PreviewData *)data;
 417   if(event->type == GDK_KEY_PRESS)
 418     if(((GdkEventKey *)event)->keyval != GDK_Escape)
 419       return FALSE;
 420   if (preview_data->rendering)
 421     return FALSE;
 422   gtk_widget_destroy(widget);
 423   return FALSE;
 424 }
 425
 426 static void cb_preview_size_allocate(GtkWidget *widget,
 427                                      GtkAllocation *allocation)
 428 {
 429   g_return_if_fail(allocation != NULL);
 430
 431   prefs_common.print_previewwin_width = allocation->width;
 432   prefs_common.print_previewwin_height = allocation->height;
 433 }
 434
 435 static void cb_preview_ready(GtkPrintOperationPreview *preview,
 436                              GtkPrintContext          *context,
 437                              gpointer                  data)
 438 {
 439   PreviewData *preview_data;
 440   gint iPage;
 441   preview_data = (PreviewData*) data;
 442   debug_print("preview_ready %d\n", preview_data->print_data->npages);
 443
 444   for(iPage = 0; iPage < (preview_data->print_data->npages); iPage++) {
 445     if(gtk_print_operation_preview_is_selected(preview_data->preview, iPage)) {
 446       preview_data->pages_to_print =
 447         g_list_prepend(preview_data->pages_to_print, GINT_TO_POINTER(iPage));
 448       debug_print("want to print page %d\n",iPage+1);
 449     }
 450   }
 451
 452   preview_data->pages_to_print = g_list_reverse(preview_data->pages_to_print);
 453   preview_data->current_page = preview_data->pages_to_print;
 454
 455   g_signal_connect(preview_data->area, "expose_event",
 456                    G_CALLBACK(cb_preview_expose),
 457                    preview_data);
 458
 459   gtk_widget_queue_draw(preview_data->area);
 460 }
 461
 462 static void cb_preview_got_page_size(GtkPrintOperationPreview *preview,
 463                                      GtkPrintContext          *context,
 464                                      GtkPageSetup             *page_setup,
 465                                      gpointer                  data)
 466 {
 467   PreviewData *preview_data;
 468   GtkPageOrientation orientation;
 469   GtkPaperSize *paper_size;
 470   gint paper_width;
 471   gint paper_height;
 472
 473   preview_data = (PreviewData*) data;
 474   debug_print("got_page_size\n");
 475   orientation  = gtk_page_setup_get_orientation(page_setup);
 476   paper_size   = gtk_page_setup_get_paper_size(page_setup);
 477   paper_width  = (gint)(gtk_paper_size_get_width(paper_size, GTK_UNIT_INCH)
 478                         * PREVIEW_SCALE);
 479   paper_height = (gint)(gtk_paper_size_get_height(paper_size,  GTK_UNIT_INCH)
 480                         * PREVIEW_SCALE);
 481
 482   preview_data->page_width  = paper_width;
 483   preview_data->page_height = paper_height;
 484
 485   debug_print("w/h %d/%d\n", paper_width, paper_height);
 486   gtk_widget_set_size_request(GTK_WIDGET(preview_data->area),
 487                               paper_width, paper_height);
 488 }
 489
 490 static gboolean cb_preview_expose(GtkWidget *widget, GdkEventExpose *event,
 491                                   gpointer data)
 492 {
 493   PreviewData *preview_data = data;
 494   GdkGC *gc;
 495   GdkColor white;
 496   GdkColor black;
 497   GdkColor gray;
 498
 499   debug_print("preview_expose (current %p)\n", preview_data->current_page);
 500   gdk_window_clear(preview_data->area->window);
 501
 502   white.red   = 65535;
 503   white.green = 65535;
 504   white.blue  = 65535;
 505   black.red   = 0;
 506   black.green = 0;
 507   black.blue  = 0;
 508   gray.red   = 32700;
 509   gray.green = 32700;
 510   gray.blue  = 32700;
 511
 512   gc = gdk_gc_new(GDK_DRAWABLE(preview_data->area->window));
 513
 514   /* background */
 515   gdk_gc_set_rgb_fg_color(gc, &gray);
 516   gdk_draw_rectangle(preview_data->area->window, gc, TRUE, 0, 0,
 517                      preview_data->area->allocation.width,
 518                      preview_data->area->allocation.height);
 519
 520   /* shadow */
 521   gdk_gc_set_rgb_fg_color(gc, &black);
 522   gdk_draw_rectangle(preview_data->area->window, gc, TRUE,
 523                      PREVIEW_SHADOW_OFFSET, PREVIEW_SHADOW_OFFSET,
 524                      preview_data->page_width+PREVIEW_SHADOW_OFFSET,
 525                      preview_data->page_height+PREVIEW_SHADOW_OFFSET);
 526
 527   /* paper */
 528   gdk_gc_set_rgb_fg_color(gc, &white);
 529   gdk_draw_rectangle(preview_data->area->window, gc, TRUE, 0, 0,
 530                      preview_data->page_width,
 531                      preview_data->page_height);
 532
 533   g_object_unref(gc);
 534
 535   if(preview_data->current_page) {
 536     preview_data->rendering = TRUE;
 537     gtk_widget_set_sensitive(preview_data->close, FALSE);
 538     int cur = GPOINTER_TO_INT(preview_data->current_page->data);
 539     gchar *str;
 540     str = g_strdup_printf(_("Page %d"), cur+1);
 541     gtk_label_set_text(GTK_LABEL(preview_data->page_nr_label), str);
 542     g_free(str);
 543     gtk_print_operation_preview_render_page(preview_data->preview,
 544                                             GPOINTER_TO_INT
 545                                             (preview_data->current_page->data));
 546
 547     gtk_widget_set_sensitive(preview_data->first, preview_data->current_page->prev != NULL);
 548     gtk_widget_set_sensitive(preview_data->previous, preview_data->current_page->prev != NULL);
 549     gtk_widget_set_sensitive(preview_data->next, preview_data->current_page->next != NULL);
 550     gtk_widget_set_sensitive(preview_data->last, preview_data->current_page->next != NULL);
 551     gtk_widget_set_sensitive(preview_data->close, TRUE);
 552     preview_data->rendering = FALSE;
 553
 554   }
 555   return TRUE;
 556 }
 557
 558 static void cb_preview_go_first(GtkButton *button, gpointer data)
 559 {
 560   PreviewData *preview_data = (PreviewData*) data;
 561   preview_data->current_page = preview_data->pages_to_print;
 562   gtk_widget_queue_draw(preview_data->area);
 563 }
 564
 565 static void cb_preview_go_previous(GtkButton *button, gpointer data)
 566 {
 567   GList *next;
 568   PreviewData *preview_data = (PreviewData*) data;
 569   next = g_list_previous(preview_data->current_page);
 570   if(next)
 571     preview_data->current_page = next;
 572   gtk_widget_queue_draw(preview_data->area);
 573 }
 574
 575 static void cb_preview_go_next(GtkButton *button, gpointer data)
 576 {
 577   GList *next;
 578   PreviewData *preview_data = (PreviewData*) data;
 579   next = g_list_next(preview_data->current_page);
 580   if(next)
 581     preview_data->current_page = next;
 582   gtk_widget_queue_draw(preview_data->area);
 583 }
 584
 585 static void cb_preview_go_last(GtkButton *button, gpointer data)
 586 {
 587   PreviewData *preview_data = (PreviewData*) data;
 588   preview_data->current_page = g_list_last(preview_data->current_page);
 589   gtk_widget_queue_draw(preview_data->area);
 590 }
 591
 592 static void cb_preview_btn_close(GtkButton *button, gpointer data)
 593 {
 594   PreviewData *preview_data = (PreviewData *)data;
 595   if (preview_data->rendering)
 596     return;
 597   gtk_widget_destroy(preview_data->dialog);
 598 }
 599
 600 static void cb_preview_zoom_100(GtkButton *button, gpointer data)
 601 {
 602   PreviewData *preview_data = (PreviewData*) data;
 603   if(preview_data->print_data->zoom != 1.) {
 604     preview_data->print_data->zoom = 1.;
 605     gtk_widget_queue_draw(preview_data->area);
 606     printing_preview_update_zoom_sensitivity(preview_data);
 607   }
 608 }
 609
 610 static void cb_preview_zoom_fit(GtkButton *button, gpointer data)
 611 {
 612   PreviewData *preview_data = (PreviewData*) data;
 613   gdouble zoom_w;
 614   gdouble zoom_h;
 615
 616   zoom_w = ((gdouble)preview_data->scrolled_window->allocation.width) /
 617     ((gdouble)preview_data->page_width/preview_data->print_data->zoom +
 618      PREVIEW_SHADOW_OFFSET);
 619   zoom_h = ((gdouble)preview_data->scrolled_window->allocation.height) /
 620     ((gdouble)preview_data->page_height/preview_data->print_data->zoom +
 621      PREVIEW_SHADOW_OFFSET);
 622
 623   preview_data->print_data->zoom = MIN(zoom_w,zoom_h) - 0.01;
 624
 625   if(preview_data->print_data->zoom > PREVIEW_ZOOM_MAX)
 626     preview_data->print_data->zoom = PREVIEW_ZOOM_MAX;
 627   else if(preview_data->print_data->zoom < PREVIEW_ZOOM_MIN)
 628     preview_data->print_data->zoom = PREVIEW_ZOOM_MIN;
 629
 630   printing_preview_update_zoom_sensitivity(preview_data);
 631   gtk_widget_queue_draw(preview_data->area);
 632 }
 633
 634 static void cb_preview_zoom_in(GtkButton *button, gpointer data)
 635 {
 636   PreviewData *preview_data = (PreviewData*) data;
 637   gdouble new_zoom;
 638   new_zoom =  preview_data->print_data->zoom * PREVIEW_ZOOM_FAC;
 639   if(new_zoom <= PREVIEW_ZOOM_MAX) {
 640     preview_data->print_data->zoom = new_zoom;
 641     printing_preview_update_zoom_sensitivity(preview_data);
 642     gtk_widget_queue_draw(preview_data->area);
 643   }
 644 }
 645
 646 static void cb_preview_zoom_out(GtkButton *button, gpointer data)
 647 {
 648   PreviewData *preview_data = (PreviewData*) data;
 649   gdouble new_zoom;
 650   new_zoom =  preview_data->print_data->zoom / PREVIEW_ZOOM_FAC;
 651   if(new_zoom >= PREVIEW_ZOOM_MIN) {
 652     preview_data->print_data->zoom = new_zoom;
 653     printing_preview_update_zoom_sensitivity(preview_data);
 654     gtk_widget_queue_draw(preview_data->area);
 655   }
 656 }
 657
 658 static void cb_preview_request_page_setup(GtkPrintOperation *op,
 659                                           GtkPrintContext *context,
 660                                           gint page_nr,
 661                                           GtkPageSetup *setup,gpointer data)
 662 {
 663   GtkPaperSize *paper_size;
 664   GtkPaperSize *old_size;
 665   gdouble width;
 666   gdouble height;
 667   gdouble top_margin;
 668   gdouble bottom_margin;
 669   gdouble left_margin;
 670   gdouble right_margin;
 671
 672   PreviewData *preview_data = (PreviewData*) data;
 673
 674   old_size = gtk_page_setup_get_paper_size(setup);
 675   width  = gtk_paper_size_get_width(old_size,GTK_UNIT_INCH);
 676   height = gtk_paper_size_get_height(old_size,GTK_UNIT_INCH);
 677
 678   top_margin    = gtk_page_setup_get_top_margin(setup,GTK_UNIT_INCH);
 679   bottom_margin = gtk_page_setup_get_bottom_margin(setup,GTK_UNIT_INCH);
 680   left_margin   = gtk_page_setup_get_left_margin(setup,GTK_UNIT_INCH);
 681   right_margin  = gtk_page_setup_get_right_margin(setup,GTK_UNIT_INCH);
 682
 683   paper_size = gtk_paper_size_new_custom("preview paper", "preview_paper",
 684                                          width*preview_data->print_data->zoom,
 685                                          height*preview_data->print_data->zoom,
 686                                          GTK_UNIT_INCH);
 687   gtk_page_setup_set_paper_size(setup, paper_size);
 688   gtk_paper_size_free(paper_size);
 689
 690   gtk_page_setup_set_top_margin(setup,top_margin*preview_data->print_data->zoom,
 691                                 GTK_UNIT_INCH);
 692   gtk_page_setup_set_bottom_margin(setup,bottom_margin*preview_data->print_data->zoom,
 693                                    GTK_UNIT_INCH);
 694   gtk_page_setup_set_left_margin(setup,left_margin*preview_data->print_data->zoom,
 695                                  GTK_UNIT_INCH);
 696   gtk_page_setup_set_right_margin(setup,right_margin*preview_data->print_data->zoom,
 697                                   GTK_UNIT_INCH);
 698 }
 699
 700 static void cb_begin_print(GtkPrintOperation *op, GtkPrintContext *context,
 701                            gpointer user_data)
 702 {
 703   double width, height;
 704   int num_lines;
 705   double page_height;
 706   GList *page_breaks;
 707   PrintData *print_data;
 708   PangoFontDescription *desc;
 709   int start, ii;
 710   PangoLayoutIter *iter;
 711   double start_pos;
 712   double line_height =0.;
 713
 714   print_data = (PrintData*) user_data;
 715
 716   debug_print("Preparing print job...\n");
 717
 718   width  = gtk_print_context_get_width(context);
 719   height = gtk_print_context_get_height(context);
 720
 721   if (print_data->layout == NULL)
 722     print_data->layout = gtk_print_context_create_pango_layout(context);
 723
 724   if(prefs_common.use_different_print_font)
 725     desc = pango_font_description_from_string(prefs_common.printfont);
 726   else
 727     desc = pango_font_description_copy(
 728                 pango_context_get_font_description(print_data->pango_context));
 729
 730   pango_layout_set_font_description(print_data->layout, desc);
 731   pango_font_description_free(desc);
 732
 733   pango_layout_set_width(print_data->layout, width * PANGO_SCALE);
 734   pango_layout_set_text(print_data->layout, print_data->text, -1);
 735
 736   printing_layout_set_text_attributes(print_data, context);
 737
 738   num_lines = pango_layout_get_line_count(print_data->layout);
 739
 740   page_breaks = NULL;
 741   page_height = 0;
 742   start = 0;
 743   ii = 0;
 744   start_pos = 0.;
 745   iter = pango_layout_get_iter(print_data->layout);
 746   do {
 747     PangoRectangle logical_rect;
 748     PangoLayoutLine *line;
 749     PangoAttrShape *attr = NULL;
 750     int baseline;
 751
 752     if(ii >= start) {
 753       line = pango_layout_iter_get_line(iter);
 754
 755       pango_layout_iter_get_line_extents(iter, NULL, &logical_rect);
 756       baseline = pango_layout_iter_get_baseline(iter);
 757
 758       if ((attr = g_hash_table_lookup(print_data->images, GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) {
 759         line_height = (double)gdk_pixbuf_get_height(GDK_PIXBUF(attr->data));
 760       } else {
 761         line_height = ((double)logical_rect.height) / PANGO_SCALE;
 762       }
 763     }
 764     if((page_height + line_height) > height) {
 765       page_breaks = g_list_prepend(page_breaks, GINT_TO_POINTER(ii));
 766       page_height = 0;
 767     }
 768
 769     page_height += line_height;
 770     ii++;
 771   } while(ii < num_lines && pango_layout_iter_next_line(iter));
 772   pango_layout_iter_free(iter);
 773
 774   page_breaks = g_list_reverse(page_breaks);
 775   print_data->npages = g_list_length(page_breaks) + 1;
 776   print_data->page_breaks = page_breaks;
 777
 778   gtk_print_operation_set_n_pages(op, print_data->npages);
 779
 780   debug_print("Starting print job...\n");
 781 }
 782
 783 static cairo_surface_t *pixbuf_to_surface(GdkPixbuf *pixbuf)
 784 {
 785           cairo_surface_t *surface;
 786           cairo_format_t format;
 787           static const cairo_user_data_key_t key;
 788           guchar *pixels = g_malloc(
 789                                 4*
 790                                 gdk_pixbuf_get_width(pixbuf)*
 791                                 gdk_pixbuf_get_height(pixbuf));
 792           guchar *src_pixels = gdk_pixbuf_get_pixels (pixbuf);
 793           gint width = gdk_pixbuf_get_width(pixbuf);
 794           gint height = gdk_pixbuf_get_height(pixbuf);
 795           gint nchans = gdk_pixbuf_get_n_channels (pixbuf);
 796           gint stride = gdk_pixbuf_get_rowstride (pixbuf);
 797           gint j;
 798
 799           if (nchans == 3)
 800             format = CAIRO_FORMAT_RGB24;
 801           else
 802             format = CAIRO_FORMAT_ARGB32;
 803           surface = cairo_image_surface_create_for_data (pixels,
 804                                                 format, width, height, 4*width);
 805           cairo_surface_set_user_data (surface, &key,
 806                 pixels, (cairo_destroy_func_t)g_free);
 807
 808           for (j = height; j; j--) {
 809                 guchar *p = src_pixels;
 810                 guchar *q = pixels;
 811
 812                 if (nchans == 3) {
 813                         guchar *end = p + 3 * width;
 814
 815                         while (p < end) {
 816 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 817                                 q[0] = p[2];
 818                                 q[1] = p[1];
 819                                 q[2] = p[0];
 820 #else
 821                                 q[1] = p[0];
 822                                 q[2] = p[1];
 823                                 q[3] = p[2];
 824 #endif
 825                                 p += 3;
 826                                 q += 4;
 827                         }
 828                 } else {
 829                         guchar *end = p + 4 * width;
 830                         guint t1,t2,t3;
 831
 832 #define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END
 833
 834                         while (p < end) {
 835 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 836                                 MULT(q[0], p[2], p[3], t1);
 837                                 MULT(q[1], p[1], p[3], t2);
 838                                 MULT(q[2], p[0], p[3], t3);
 839                                 q[3] = p[3];
 840 #else
 841                                 q[0] = p[3];
 842                                 MULT(q[1], p[0], p[3], t1);
 843                                 MULT(q[2], p[1], p[3], t2);
 844                                 MULT(q[3], p[2], p[3], t3);
 845 #endif
 846
 847                                 p += 4;
 848                                 q += 4;
 849                         }
 850
 851 #undef MULT
 852                 }
 853
 854                 src_pixels += stride;
 855                 pixels += 4 * width;
 856         }
 857
 858         return surface;
 859 }
 860
 861 static void cb_draw_page(GtkPrintOperation *op, GtkPrintContext *context,
 862                          int page_nr, gpointer user_data)
 863 {
 864   cairo_t *cr;
 865   PrintData *print_data;
 866   int start, end, ii;
 867   GList *pagebreak;
 868   PangoLayoutIter *iter;
 869   double start_pos;
 870   gboolean notlast = TRUE;
 871
 872   print_data = (PrintData*) user_data;
 873
 874   if (page_nr == 0) {
 875     start = 0;
 876   } else {
 877     pagebreak = g_list_nth(print_data->page_breaks, page_nr - 1);
 878     start = GPOINTER_TO_INT(pagebreak->data);
 879   }
 880
 881   pagebreak = g_list_nth(print_data->page_breaks, page_nr);
 882   if(pagebreak == NULL)
 883     end = pango_layout_get_line_count(print_data->layout);
 884   else
 885     end = GPOINTER_TO_INT(pagebreak->data);
 886
 887   cr = gtk_print_context_get_cairo_context(context);
 888   cairo_scale(cr, print_data->zoom, print_data->zoom);
 889   cairo_set_source_rgb(cr, 0., 0., 0.);
 890
 891   ii = 0;
 892   start_pos = 0.;
 893   iter = pango_layout_get_iter(print_data->layout);
 894   do {
 895     PangoRectangle logical_rect;
 896     PangoLayoutLine *line;
 897     PangoAttrShape *attr = NULL;
 898     int baseline;
 899
 900     if(ii >= start) {
 901       line = pango_layout_iter_get_line(iter);
 902
 903       pango_layout_iter_get_line_extents(iter, NULL, &logical_rect);
 904       baseline = pango_layout_iter_get_baseline(iter);
 905
 906       if(ii == start)
 907         start_pos = ((double)logical_rect.y) / PANGO_SCALE;
 908
 909       cairo_move_to(cr,
 910                     ((double)logical_rect.x) / PANGO_SCALE,
 911                     ((double)baseline) / PANGO_SCALE - start_pos);
 912
 913       if ((attr = g_hash_table_lookup(print_data->images, GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) {
 914           cairo_surface_t *surface;
 915
 916           surface = pixbuf_to_surface(GDK_PIXBUF(attr->data));
 917           cairo_set_source_surface (cr, surface,
 918                 ((double)logical_rect.x) / PANGO_SCALE,
 919                 ((double)baseline) / PANGO_SCALE - start_pos);
 920           cairo_paint (cr);
 921           cairo_surface_destroy (surface);
 922       } else {
 923         pango_cairo_show_layout_line(cr, line);
 924       }
 925     }
 926     ii++;
 927   } while(ii < end && (notlast = pango_layout_iter_next_line(iter)));
 928   pango_layout_iter_free(iter);
 929   debug_print("Sent page %d to printer\n", page_nr+1);
 930 }
 931
 932 static void printing_layout_set_text_attributes(PrintData *print_data, GtkPrintContext *context)
 933 {
 934   GtkTextIter iter;
 935   PangoAttrList *attr_list;
 936   PangoAttribute *attr;
 937   GSList *open_attrs, *attr_walk;
 938
 939   attr_list = pango_attr_list_new();
 940   if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
 941     gtk_text_buffer_get_start_iter(print_data->buffer, &iter);
 942   } else {
 943     gtk_text_buffer_get_iter_at_offset(print_data->buffer, &iter, print_data->sel_start);
 944   }
 945
 946   open_attrs = NULL;
 947   do {
 948     gboolean fg_set, bg_set, under_set, strike_set;
 949     GSList *tags, *tag_walk;
 950     GtkTextTag *tag;
 951     GdkColor *color;
 952     PangoUnderline underline;
 953     gboolean strikethrough;
 954     GdkPixbuf *image;
 955
 956     if (prefs_common.print_imgs && (image = gtk_text_iter_get_pixbuf(&iter)) != NULL) {
 957       PangoRectangle rect = {0, 0, 0, 0};
 958       gint startpos = printing_text_iter_get_offset_bytes(print_data, &iter);
 959       gint h = gdk_pixbuf_get_height(image);
 960       gint w = gdk_pixbuf_get_width(image);
 961       gint a_h = gtk_print_context_get_height(context);
 962       gint a_w = gtk_print_context_get_width(context);
 963       gint r_h, r_w;
 964       GdkPixbuf *scaled = NULL;
 965       image_viewer_get_resized_size(w, h, a_w, a_h, &r_w, &r_h);
 966       rect.x = 0;
 967       rect.y = 0;
 968       rect.width = r_w * PANGO_SCALE;
 969       rect.height = r_h * PANGO_SCALE;
 970
 971       scaled = gdk_pixbuf_scale_simple(image, r_w, r_h, GDK_INTERP_BILINEAR);
 972       attr = pango_attr_shape_new_with_data (&rect, &rect,
 973                scaled, NULL, NULL);
 974       attr->start_index = startpos;
 975       attr->end_index = startpos+1;
 976       pango_attr_list_insert(attr_list, attr);
 977       g_hash_table_insert(print_data->images, GINT_TO_POINTER(startpos), attr);
 978       print_data->img_cnt++;
 979     }
 980
 981     if(gtk_text_iter_ends_tag(&iter, NULL)) {
 982       PangoAttrColor *attr_color;
 983       PangoAttrInt   *attr_int;
 984
 985       tags = gtk_text_iter_get_toggled_tags(&iter, FALSE);
 986       for(tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) {
 987         gboolean found;
 988
 989         tag = GTK_TEXT_TAG(tag_walk->data);
 990         g_object_get(G_OBJECT(tag),
 991                      "background-set", &bg_set,
 992                      "foreground-set", &fg_set,
 993                      "underline-set",&under_set,
 994                      "strikethrough-set", &strike_set,
 995                      NULL);
 996
 997         if(fg_set) {
 998           found = FALSE;
 999           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1000             attr = (PangoAttribute*)attr_walk->data;
1001             if(attr->klass->type == PANGO_ATTR_FOREGROUND) {
1002               attr_color = (PangoAttrColor*) attr;
1003               g_object_get(G_OBJECT(tag), "foreground_gdk", &color, NULL);
1004               if(printing_is_pango_gdk_color_equal(&(attr_color->color), color)) {
1005                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1006                 pango_attr_list_insert(attr_list, attr);
1007                 found = TRUE;
1008                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1009                 break;
1010               }
1011               if (color)
1012                 gdk_color_free(color);
1013             }
1014           }
1015           if(!found)
1016             debug_print("Error generating attribute list.\n");
1017         }
1018
1019         if(bg_set) {
1020           found = FALSE;
1021           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1022             attr = (PangoAttribute*)attr_walk->data;
1023             if(attr->klass->type == PANGO_ATTR_BACKGROUND) {
1024               attr_color = (PangoAttrColor*) attr;
1025               g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL);
1026               if(printing_is_pango_gdk_color_equal(&(attr_color->color), color)) {
1027                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1028                 pango_attr_list_insert(attr_list, attr);
1029                 found = TRUE;
1030                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1031                 break;
1032               }
1033               if (color)
1034                 gdk_color_free(color);
1035             }
1036           }
1037           if(!found)
1038             debug_print("Error generating attribute list.\n");
1039         }
1040
1041         if(under_set) {
1042           found = FALSE;
1043           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1044             attr = (PangoAttribute*)attr_walk->data;
1045             if(attr->klass->type == PANGO_ATTR_UNDERLINE) {
1046               attr_int = (PangoAttrInt*)attr;
1047               g_object_get(G_OBJECT(tag), "underline", &underline, NULL);
1048               if(attr_int->value == underline) {
1049                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1050                 pango_attr_list_insert(attr_list, attr);
1051                 found = TRUE;
1052                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1053                 break;
1054               }
1055             }
1056           }
1057           if(!found)
1058             debug_print("Error generating attribute list.\n");
1059         }
1060
1061         if(strike_set) {
1062           found = FALSE;
1063           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1064             attr = (PangoAttribute*)attr_walk->data;
1065             if(attr->klass->type == PANGO_ATTR_STRIKETHROUGH) {
1066               attr_int = (PangoAttrInt*)attr;
1067               g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL);
1068               if(attr_int->value == strikethrough) {
1069                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1070                 pango_attr_list_insert(attr_list, attr);
1071                 found = TRUE;
1072                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1073                 break;
1074               }
1075             }
1076           }
1077           if(!found)
1078             debug_print("Error generating attribute list.\n");
1079         }
1080
1081       }
1082       g_slist_free(tags);
1083     }
1084
1085     if(gtk_text_iter_begins_tag(&iter, NULL)) {
1086       tags = gtk_text_iter_get_toggled_tags(&iter, TRUE);
1087       for(tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) {
1088         tag = GTK_TEXT_TAG(tag_walk->data);
1089         g_object_get(G_OBJECT(tag),
1090                      "background-set", &bg_set,
1091                      "foreground-set", &fg_set,
1092                      "underline-set", &under_set,
1093                      "strikethrough-set", &strike_set,
1094                      NULL);
1095         if(fg_set) {
1096           g_object_get(G_OBJECT(tag), "foreground-gdk", &color, NULL);
1097           attr = pango_attr_foreground_new(color->red,color->green,color->blue);
1098           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1099           open_attrs = g_slist_prepend(open_attrs, attr);
1100         }
1101         if(bg_set) {
1102           g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL);
1103           attr = pango_attr_background_new(color->red,color->green,color->blue);
1104           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1105           open_attrs = g_slist_prepend(open_attrs, attr);
1106         }
1107         if(under_set) {
1108           g_object_get(G_OBJECT(tag), "underline", &underline, NULL);
1109           attr = pango_attr_underline_new(underline);
1110           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1111           open_attrs = g_slist_prepend(open_attrs, attr);
1112         }
1113         if(strike_set) {
1114           g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL);
1115           attr = pango_attr_strikethrough_new(strikethrough);
1116           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1117           open_attrs = g_slist_prepend(open_attrs, attr);
1118         }
1119       }
1120       g_slist_free(tags);
1121     }
1122
1123   } while(!gtk_text_iter_is_end(&iter) && gtk_text_iter_forward_to_tag_toggle(&iter, NULL));
1124
1125   /* close all open attributes */
1126   for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1127     attr = (PangoAttribute*) attr_walk->data;
1128     attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1129     pango_attr_list_insert(attr_list, attr);
1130   }
1131   g_slist_free(open_attrs);
1132
1133   pango_layout_set_attributes(print_data->layout, attr_list);
1134   pango_attr_list_unref(attr_list);
1135 }
1136
1137 static gboolean printing_is_pango_gdk_color_equal(PangoColor *p, GdkColor *g)
1138 {
1139   return ((p->red == g->red) && (p->green == g->green) && (p->blue == g->blue));
1140 }
1141
1142 /* Pango has it's attribute in bytes, but GtkTextIter gets only an offset
1143  * in characters, so here we're returning an offset in bytes.
1144  */
1145 static gint printing_text_iter_get_offset_bytes(PrintData *print_data, const GtkTextIter *iter)
1146 {
1147   gint off_chars;
1148   gint off_bytes;
1149   gchar *text;
1150   GtkTextIter start;
1151
1152   off_chars = gtk_text_iter_get_offset(iter);
1153   if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
1154     gtk_text_buffer_get_start_iter(gtk_text_iter_get_buffer(iter), &start);
1155   } else {
1156     gtk_text_buffer_get_iter_at_offset(gtk_text_iter_get_buffer(iter), &start, print_data->sel_start);
1157   }
1158   text = gtk_text_iter_get_text(&start, iter);
1159   off_bytes = strlen(text);
1160   g_free(text);
1161   return off_bytes;
1162 }
1163
1164 static void printing_preview_update_zoom_sensitivity(PreviewData *preview_data)
1165 {
1166   if((preview_data->print_data->zoom * PREVIEW_ZOOM_FAC) > PREVIEW_ZOOM_MAX)
1167     gtk_widget_set_sensitive(preview_data->zoom_in, FALSE);
1168   else
1169     gtk_widget_set_sensitive(preview_data->zoom_in, TRUE);
1170
1171   if((preview_data->print_data->zoom / PREVIEW_ZOOM_FAC) < PREVIEW_ZOOM_MIN)
1172     gtk_widget_set_sensitive(preview_data->zoom_out, FALSE);
1173   else
1174     gtk_widget_set_sensitive(preview_data->zoom_out, TRUE);
1175 }
1176
1177 #endif /* GTK+ >= 2.10.0 */