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 struct _PrintData {
  41   PrintRenderer *renderer;
  42   gpointer renderer_data;
  43   PangoLayout *layout;
  44   PangoContext *pango_context;
  45   gpointer to_print;
  46   GList *page_breaks;
  47   guint npages;
  48   gint sel_start;
  49   gint sel_end;
  50   GHashTable *images;
  51   gint img_cnt;
  52   gdouble zoom;
  53 };
  54
  55 typedef struct {
  56   GtkPrintOperation *op;
  57   GtkPrintOperationPreview *preview;
  58   GtkWidget         *dialog;
  59   GtkWidget         *scrolled_window;
  60   GtkWidget         *area;
  61   PrintData         *print_data;
  62   GtkWidget         *page_nr_label;
  63   GList             *pages_to_print;
  64   GList             *current_page;
  65   GtkWidget *first;
  66   GtkWidget *next;
  67   GtkWidget *previous;
  68   GtkWidget *last;
  69   GtkWidget *close;
  70   GtkWidget *zoom_100;
  71   GtkWidget *zoom_fit;
  72   GtkWidget *zoom_in;
  73   GtkWidget *zoom_out;
  74   gboolean rendering;
  75   gint page_width;
  76   gint page_height;
  77 } PreviewData;
  78
  79 /* callbacks */
  80 static void     printing_textview_cb_begin_print(GtkPrintOperation*, GtkPrintContext*, gpointer);
  81 static void     printing_textview_cb_draw_page(GtkPrintOperation*, GtkPrintContext*, gint,
  82                              gpointer);
  83 static gboolean cb_preview(GtkPrintOperation*, GtkPrintOperationPreview*,
  84                            GtkPrintContext*, GtkWindow*, gpointer);
  85 static void     cb_preview_destroy(GtkWindow*, gpointer);
  86 static gboolean cb_preview_close(GtkWidget*, GdkEventAny*, gpointer);
  87 static void     cb_preview_size_allocate(GtkWidget*, GtkAllocation*);
  88 static void     cb_preview_ready(GtkPrintOperationPreview*,
  89                                  GtkPrintContext*, gpointer);
  90 static gboolean cb_preview_expose(GtkWidget*, GdkEventExpose*, gpointer);
  91 static void     cb_preview_got_page_size(GtkPrintOperationPreview*,
  92                                          GtkPrintContext*,
  93                                          GtkPageSetup*, gpointer);
  94 static void     cb_preview_go_first(GtkButton*, gpointer);
  95 static void     cb_preview_go_previous(GtkButton*, gpointer);
  96 static void     cb_preview_go_next(GtkButton*, gpointer);
  97 static void     cb_preview_go_last(GtkButton*, gpointer);
  98 static void     cb_preview_btn_close(GtkButton*, gpointer);
  99 static void     cb_preview_zoom_100(GtkButton*, gpointer);
 100 static void     cb_preview_zoom_fit(GtkButton*, gpointer);
 101 static void     cb_preview_zoom_in(GtkButton*, gpointer);
 102 static void     cb_preview_zoom_out(GtkButton*, gpointer);
 103 static void     cb_preview_request_page_setup(GtkPrintOperation*,
 104                                               GtkPrintContext*,
 105                                               gint,GtkPageSetup*,gpointer);
 106
 107 static void     printing_preview_update_zoom_sensitivity(PreviewData*);
 108
 109 /* variables */
 110 static GtkPrintSettings *settings   = NULL;
 111 static GtkPageSetup     *page_setup = NULL;
 112
 113 /* other static functions */
 114 static void     printing_layout_set_text_attributes(PrintData*, GtkPrintContext *);
 115 static gboolean printing_is_pango_gdk_color_equal(PangoColor*, GdkColor*);
 116 static gint     printing_text_iter_get_offset_bytes(PrintData *, const GtkTextIter*);
 117
 118 #define PREVIEW_SCALE 72
 119 #define PREVIEW_SHADOW_OFFSET 3
 120 #define PREVIEW_ZOOM_FAC 1.41
 121 #define PREVIEW_ZOOM_MAX 10.
 122 #define PREVIEW_ZOOM_MIN 0.2
 123
 124 static void free_pixbuf(gpointer key, gpointer value, gpointer data)
 125 {
 126   PangoAttrShape *attr = (PangoAttrShape *) value;
 127   g_object_unref(G_OBJECT(attr->data));
 128 }
 129
 130 gpointer printing_get_renderer_data(PrintData *print_data)
 131 {
 132         if (!print_data)
 133                 return NULL;
 134         return print_data->renderer_data;
 135 }
 136
 137 gdouble printing_get_zoom(PrintData *print_data)
 138 {
 139         if (!print_data)
 140                 return 1.0;
 141         return print_data->zoom;
 142 }
 143
 144 void printing_set_n_pages(PrintData *print_data, gint n_pages)
 145 {
 146         if (!print_data)
 147                 return;
 148         print_data->npages = n_pages;
 149 }
 150
 151 void printing_print_full(GtkWindow *parent, PrintRenderer *renderer, gpointer renderer_data,
 152                          gint sel_start, gint sel_end)
 153 {
 154   GtkPrintOperation *op;
 155   GtkPrintOperationResult res;
 156   PrintData *print_data;
 157
 158   op = gtk_print_operation_new();
 159
 160   print_data = g_new0(PrintData,1);
 161
 162   print_data->renderer = renderer;
 163   print_data->renderer_data = renderer_data;
 164   print_data->sel_start = sel_start;
 165   print_data->sel_end = sel_end;
 166
 167   print_data->zoom = 1.;
 168
 169   print_data->images = g_hash_table_new(g_direct_hash, g_direct_equal);
 170
 171   print_data->pango_context = renderer->get_pango_context(renderer_data);
 172
 173   print_data->to_print = renderer->get_data_to_print(renderer_data, sel_start, sel_end);
 174
 175   if (settings == NULL) {
 176     settings = gtk_print_settings_new();
 177     gtk_print_settings_set_use_color(settings, prefs_common.print_use_color);
 178     gtk_print_settings_set_collate(settings, prefs_common.print_use_collate);
 179     gtk_print_settings_set_reverse(settings, prefs_common.print_use_reverse);
 180     gtk_print_settings_set_duplex(settings, prefs_common.print_use_duplex);
 181   }
 182   if (page_setup == NULL) {
 183     page_setup = gtk_page_setup_new();
 184     if (prefs_common.print_paper_type && *prefs_common.print_paper_type) {
 185       GtkPaperSize *paper = gtk_paper_size_new(prefs_common.print_paper_type);
 186       gtk_page_setup_set_paper_size(page_setup, paper);
 187       gtk_paper_size_free(paper);
 188     }
 189     gtk_page_setup_set_orientation(page_setup, prefs_common.print_paper_orientation);
 190   }
 191
 192   /* Config for printing */
 193   gtk_print_operation_set_print_settings(op, settings);
 194   gtk_print_operation_set_default_page_setup(op, page_setup);
 195
 196   /* signals */
 197   g_signal_connect(op, "begin_print", G_CALLBACK(renderer->cb_begin_print), print_data);
 198   g_signal_connect(op, "draw_page", G_CALLBACK(renderer->cb_draw_page), print_data);
 199   g_signal_connect(op, "preview", G_CALLBACK(cb_preview), print_data);
 200
 201   /* Start printing process */
 202   res = gtk_print_operation_run(op, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
 203                                 parent, NULL);
 204
 205   if(res == GTK_PRINT_OPERATION_RESULT_ERROR) {
 206     GError *error = NULL;
 207     gtk_print_operation_get_error(op, &error);
 208     debug_print("Error printing message: %s",
 209             error ? error->message : "no details");
 210   }
 211   else if(res == GTK_PRINT_OPERATION_RESULT_APPLY) {
 212     /* store settings for next printing session */
 213     if(settings != NULL)
 214       g_object_unref(settings);
 215     settings = g_object_ref(gtk_print_operation_get_print_settings(op));
 216     prefs_common.print_use_color = gtk_print_settings_get_use_color(settings);
 217     prefs_common.print_use_collate = gtk_print_settings_get_collate(settings);
 218     prefs_common.print_use_reverse = gtk_print_settings_get_reverse(settings);
 219     prefs_common.print_use_duplex = gtk_print_settings_get_duplex(settings);
 220   }
 221
 222   g_hash_table_foreach(print_data->images, free_pixbuf, NULL);
 223   g_hash_table_destroy(print_data->images);
 224   if(print_data->to_print)
 225     g_free(print_data->to_print);
 226   g_list_free(print_data->page_breaks);
 227   if(print_data->layout)
 228     g_object_unref(print_data->layout);
 229
 230   g_free(print_data);
 231
 232   g_object_unref(op);
 233   debug_print("printing_print finished\n");
 234 }
 235
 236 static PangoContext *printing_textview_get_pango_context(gpointer data)
 237 {
 238         return gtk_widget_get_pango_context(GTK_WIDGET(data));
 239 }
 240
 241 static gpointer printing_textview_get_data_to_print(gpointer data, gint sel_start, gint sel_end)
 242 {
 243   GtkTextView *text_view = GTK_TEXT_VIEW(data);
 244   GtkTextBuffer *buffer = gtk_text_view_get_buffer(text_view);
 245   GtkTextIter start, end;
 246
 247   if (sel_start < 0 || sel_end <= sel_start) {
 248     gtk_text_buffer_get_start_iter(buffer, &start);
 249     gtk_text_buffer_get_end_iter(buffer, &end);
 250   } else {
 251     gtk_text_buffer_get_iter_at_offset(buffer, &start, sel_start);
 252     gtk_text_buffer_get_iter_at_offset(buffer, &end, sel_end);
 253   }
 254
 255   return gtk_text_buffer_get_text(buffer, &start, &end, FALSE);
 256 }
 257
 258 void printing_print(GtkTextView *text_view, GtkWindow *parent, gint sel_start, gint sel_end)
 259 {
 260         PrintRenderer *textview_renderer = g_new0(PrintRenderer, 1);
 261
 262         textview_renderer->get_pango_context = printing_textview_get_pango_context;
 263         textview_renderer->get_data_to_print = printing_textview_get_data_to_print;
 264         textview_renderer->cb_begin_print    = printing_textview_cb_begin_print;
 265         textview_renderer->cb_draw_page      = printing_textview_cb_draw_page;
 266
 267         printing_print_full(parent, textview_renderer, text_view, sel_start, sel_end);
 268
 269         g_free(textview_renderer);
 270 }
 271
 272 void printing_page_setup(GtkWindow *parent)
 273 {
 274   GtkPageSetup *new_page_setup;
 275
 276   if(settings == NULL) {
 277     settings = gtk_print_settings_new();
 278     gtk_print_settings_set_use_color(settings, prefs_common.print_use_color);
 279     gtk_print_settings_set_collate(settings, prefs_common.print_use_collate);
 280     gtk_print_settings_set_reverse(settings, prefs_common.print_use_reverse);
 281     gtk_print_settings_set_duplex(settings, prefs_common.print_use_duplex);
 282   }
 283   if (page_setup == NULL) {
 284     page_setup = gtk_page_setup_new();
 285     if (prefs_common.print_paper_type && *prefs_common.print_paper_type) {
 286       GtkPaperSize *paper = gtk_paper_size_new(prefs_common.print_paper_type);
 287       gtk_page_setup_set_paper_size(page_setup, paper);
 288       gtk_paper_size_free(paper);
 289     }
 290     gtk_page_setup_set_orientation(page_setup, prefs_common.print_paper_orientation);
 291   }
 292
 293   new_page_setup = gtk_print_run_page_setup_dialog(parent,page_setup,settings);
 294
 295   if(page_setup)
 296     g_object_unref(page_setup);
 297
 298   page_setup = new_page_setup;
 299
 300   g_free(prefs_common.print_paper_type);
 301   prefs_common.print_paper_type = g_strdup(gtk_paper_size_get_name(
 302                 gtk_page_setup_get_paper_size(page_setup)));
 303   prefs_common.print_paper_orientation = gtk_page_setup_get_orientation(page_setup);
 304 }
 305
 306 static gboolean cb_preview(GtkPrintOperation        *operation,
 307                            GtkPrintOperationPreview *preview,
 308                            GtkPrintContext          *context,
 309                            GtkWindow                *parent,
 310                            gpointer                 data)
 311 {
 312   PrintData *print_data;
 313   cairo_t *cr;
 314   PreviewData *preview_data;
 315   GtkWidget *vbox;
 316   GtkWidget *toolbar;
 317   GtkWidget *da;
 318   GtkWidget *sw;
 319   GtkWidget *page;
 320   GtkToolItem *separator;
 321   static GdkGeometry geometry;
 322   GtkWidget *dialog = NULL;
 323   GtkTooltips *toolbar_tips = gtk_tooltips_new();
 324   GtkWidget *statusbar = gtk_hbox_new(2, FALSE);
 325   debug_print("Creating internal print preview\n");
 326
 327   print_data = (PrintData*) data;
 328
 329   preview_data = g_new0(PreviewData,1);
 330   preview_data->print_data = print_data;
 331   preview_data->op = g_object_ref(operation);
 332   preview_data->preview = preview;
 333
 334   /* Window */
 335   dialog = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "print_preview");
 336   preview_data->dialog = dialog;
 337   if(!geometry.min_height) {
 338     geometry.min_width = 600;
 339     geometry.min_height = 400;
 340   }
 341   gtk_window_set_geometry_hints(GTK_WINDOW(dialog), NULL, &geometry,
 342                                 GDK_HINT_MIN_SIZE);
 343   gtk_widget_set_size_request(dialog, prefs_common.print_previewwin_width,
 344                               prefs_common.print_previewwin_height);
 345   gtk_window_set_title(GTK_WINDOW(dialog), _("Print preview"));
 346
 347   /* vbox */
 348   vbox = gtk_vbox_new(FALSE, 0);
 349   gtk_container_add(GTK_CONTAINER(dialog), vbox);
 350
 351   /* toolbar */
 352   toolbar = gtk_toolbar_new();
 353   gtk_toolbar_set_orientation(GTK_TOOLBAR(toolbar), GTK_ORIENTATION_HORIZONTAL);
 354   switch (prefs_common.toolbar_style) {
 355   case TOOLBAR_ICON:
 356     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS);
 357     break;
 358   case TOOLBAR_TEXT:
 359     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_TEXT);
 360     break;
 361   case TOOLBAR_BOTH_HORIZ:
 362     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH_HORIZ);
 363     break;
 364   case TOOLBAR_BOTH:
 365   default:
 366     gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH);
 367   }
 368   gtk_toolbar_set_show_arrow(GTK_TOOLBAR(toolbar), TRUE);
 369
 370   gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0);
 371
 372 #define TOOLBAR_ITEM(item,text,tooltip,cb,cbdata) {                                                             \
 373         item = GTK_WIDGET(gtk_tool_button_new_from_stock(text));                                        \
 374         gtk_tool_item_set_homogeneous(GTK_TOOL_ITEM(item), FALSE);                                      \
 375         gtk_tool_item_set_is_important(GTK_TOOL_ITEM(item), TRUE);                                      \
 376         gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(item), -1);                              \
 377         g_signal_connect (G_OBJECT(item), "clicked", G_CALLBACK(cb), cbdata);                           \
 378         gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(item), GTK_TOOLTIPS(toolbar_tips),                      \
 379                         tooltip, NULL);                                                                 \
 380 }
 381
 382   TOOLBAR_ITEM(preview_data->first, GTK_STOCK_GOTO_FIRST, _("First page"), cb_preview_go_first, preview_data);
 383   TOOLBAR_ITEM(preview_data->previous, GTK_STOCK_GO_BACK, _("Previous page"), cb_preview_go_previous, preview_data);
 384
 385   page = gtk_label_new("");
 386   gtk_widget_set_size_request(page, 100, -1);
 387   preview_data->page_nr_label = page;
 388
 389   TOOLBAR_ITEM(preview_data->next, GTK_STOCK_GO_FORWARD, _("Next page"), cb_preview_go_next, preview_data);
 390   TOOLBAR_ITEM(preview_data->last, GTK_STOCK_GOTO_LAST, _("Last page"), cb_preview_go_last, preview_data);
 391
 392   separator = gtk_separator_tool_item_new();
 393   gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1);
 394
 395   TOOLBAR_ITEM(preview_data->zoom_100, GTK_STOCK_ZOOM_100, _("Zoom 100%"), cb_preview_zoom_100, preview_data);
 396   TOOLBAR_ITEM(preview_data->zoom_fit, GTK_STOCK_ZOOM_FIT, _("Zoom fit"), cb_preview_zoom_fit, preview_data);
 397   TOOLBAR_ITEM(preview_data->zoom_in, GTK_STOCK_ZOOM_IN, _("Zoom in"), cb_preview_zoom_in, preview_data);
 398   TOOLBAR_ITEM(preview_data->zoom_out, GTK_STOCK_ZOOM_OUT, _("Zoom out"), cb_preview_zoom_out, preview_data);
 399
 400   separator = gtk_separator_tool_item_new();
 401   gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1);
 402
 403   /* tooltip has to be NULL else it triggers an expose_event */
 404   TOOLBAR_ITEM(preview_data->close, GTK_STOCK_CLOSE, NULL, cb_preview_btn_close, preview_data);
 405
 406   gtk_widget_show(statusbar);
 407   gtk_box_pack_start(GTK_BOX(vbox), statusbar, FALSE, FALSE, 0);
 408   gtk_box_pack_start(GTK_BOX(statusbar), page, FALSE, FALSE, 0);
 409   /* Drawing area */
 410   sw = gtk_scrolled_window_new(NULL, NULL);
 411   gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
 412                                  GTK_POLICY_AUTOMATIC,
 413                                  GTK_POLICY_AUTOMATIC);
 414   gtk_box_pack_start(GTK_BOX(vbox), sw, TRUE, TRUE, 0);
 415   da = gtk_drawing_area_new();
 416   gtk_widget_set_double_buffered(da, FALSE);
 417   gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw),
 418                                         da);
 419   gtk_widget_realize(da);
 420   preview_data->scrolled_window = sw;
 421   preview_data->area = da;
 422
 423   /* cairo context */
 424   cr = gdk_cairo_create(da->window);
 425   gtk_print_context_set_cairo_context(context, cr, PREVIEW_SCALE, PREVIEW_SCALE);
 426   cairo_destroy(cr);
 427
 428   /* signals */
 429   g_signal_connect(dialog, "key_press_event",
 430                    G_CALLBACK(cb_preview_close), preview_data);
 431   g_signal_connect(dialog, "size_allocate",
 432                    G_CALLBACK(cb_preview_size_allocate), NULL);
 433   g_signal_connect(dialog, "destroy",G_CALLBACK(cb_preview_destroy),
 434                    preview_data);
 435   g_signal_connect(preview, "ready", G_CALLBACK(cb_preview_ready),
 436                    preview_data);
 437   g_signal_connect(preview, "got-page-size",
 438                    G_CALLBACK(cb_preview_got_page_size), preview_data);
 439
 440   g_signal_connect(operation, "request-page-setup",
 441                    G_CALLBACK(cb_preview_request_page_setup), preview_data);
 442
 443   gtk_widget_show_all(dialog);
 444   return TRUE;
 445 }
 446
 447 static void cb_preview_destroy(GtkWindow *window, gpointer data)
 448 {
 449   PreviewData *preview_data;
 450   preview_data = (PreviewData*) data;
 451
 452   if (preview_data->rendering)
 453     return;
 454   debug_print("Preview window destroyed\n");
 455
 456   gtk_print_operation_preview_end_preview(preview_data->preview);
 457   g_object_unref(preview_data->op);
 458   g_list_free(preview_data->pages_to_print);
 459
 460   g_free(preview_data);
 461 }
 462
 463 static gboolean cb_preview_close(GtkWidget *widget, GdkEventAny *event,
 464                                  gpointer data)
 465 {
 466   PreviewData *preview_data = (PreviewData *)data;
 467   if(event->type == GDK_KEY_PRESS)
 468     if(((GdkEventKey *)event)->keyval != GDK_Escape)
 469       return FALSE;
 470   if (preview_data->rendering)
 471     return FALSE;
 472   gtk_widget_destroy(widget);
 473   return FALSE;
 474 }
 475
 476 static void cb_preview_size_allocate(GtkWidget *widget,
 477                                      GtkAllocation *allocation)
 478 {
 479   g_return_if_fail(allocation != NULL);
 480
 481   prefs_common.print_previewwin_width = allocation->width;
 482   prefs_common.print_previewwin_height = allocation->height;
 483 }
 484
 485 static void cb_preview_ready(GtkPrintOperationPreview *preview,
 486                              GtkPrintContext          *context,
 487                              gpointer                  data)
 488 {
 489   PreviewData *preview_data;
 490   gint iPage;
 491   preview_data = (PreviewData*) data;
 492   debug_print("preview_ready %d\n", preview_data->print_data->npages);
 493
 494   for(iPage = 0; iPage < (preview_data->print_data->npages); iPage++) {
 495     if(gtk_print_operation_preview_is_selected(preview_data->preview, iPage)) {
 496       preview_data->pages_to_print =
 497         g_list_prepend(preview_data->pages_to_print, GINT_TO_POINTER(iPage));
 498       debug_print("want to print page %d\n",iPage+1);
 499     }
 500   }
 501
 502   preview_data->pages_to_print = g_list_reverse(preview_data->pages_to_print);
 503   preview_data->current_page = preview_data->pages_to_print;
 504
 505   g_signal_connect(preview_data->area, "expose_event",
 506                    G_CALLBACK(cb_preview_expose),
 507                    preview_data);
 508
 509   gtk_widget_queue_draw(preview_data->area);
 510 }
 511
 512 static void cb_preview_got_page_size(GtkPrintOperationPreview *preview,
 513                                      GtkPrintContext          *context,
 514                                      GtkPageSetup             *page_setup,
 515                                      gpointer                  data)
 516 {
 517   PreviewData *preview_data;
 518   GtkPageOrientation orientation;
 519   GtkPaperSize *paper_size;
 520   gint paper_width;
 521   gint paper_height;
 522
 523   preview_data = (PreviewData*) data;
 524   debug_print("got_page_size\n");
 525   orientation  = gtk_page_setup_get_orientation(page_setup);
 526   paper_size   = gtk_page_setup_get_paper_size(page_setup);
 527   paper_width  = (gint)(gtk_paper_size_get_width(paper_size, GTK_UNIT_INCH)
 528                         * PREVIEW_SCALE);
 529   paper_height = (gint)(gtk_paper_size_get_height(paper_size,  GTK_UNIT_INCH)
 530                         * PREVIEW_SCALE);
 531
 532   preview_data->page_width  = paper_width;
 533   preview_data->page_height = paper_height;
 534
 535   debug_print("w/h %d/%d\n", paper_width, paper_height);
 536   gtk_widget_set_size_request(GTK_WIDGET(preview_data->area),
 537                               paper_width, paper_height);
 538 }
 539
 540 static gboolean cb_preview_expose(GtkWidget *widget, GdkEventExpose *event,
 541                                   gpointer data)
 542 {
 543   PreviewData *preview_data = data;
 544   GdkGC *gc;
 545   GdkColor white;
 546   GdkColor black;
 547   GdkColor gray;
 548
 549   debug_print("preview_expose (current %p)\n", preview_data->current_page);
 550   gdk_window_clear(preview_data->area->window);
 551
 552   white.red   = 65535;
 553   white.green = 65535;
 554   white.blue  = 65535;
 555   black.red   = 0;
 556   black.green = 0;
 557   black.blue  = 0;
 558   gray.red   = 32700;
 559   gray.green = 32700;
 560   gray.blue  = 32700;
 561
 562   gc = gdk_gc_new(GDK_DRAWABLE(preview_data->area->window));
 563
 564   /* background */
 565   gdk_gc_set_rgb_fg_color(gc, &gray);
 566   gdk_draw_rectangle(preview_data->area->window, gc, TRUE, 0, 0,
 567                      preview_data->area->allocation.width,
 568                      preview_data->area->allocation.height);
 569
 570   /* shadow */
 571   gdk_gc_set_rgb_fg_color(gc, &black);
 572   gdk_draw_rectangle(preview_data->area->window, gc, TRUE,
 573                      PREVIEW_SHADOW_OFFSET, PREVIEW_SHADOW_OFFSET,
 574                      preview_data->page_width+PREVIEW_SHADOW_OFFSET,
 575                      preview_data->page_height+PREVIEW_SHADOW_OFFSET);
 576
 577   /* paper */
 578   gdk_gc_set_rgb_fg_color(gc, &white);
 579   gdk_draw_rectangle(preview_data->area->window, gc, TRUE, 0, 0,
 580                      preview_data->page_width,
 581                      preview_data->page_height);
 582
 583   g_object_unref(gc);
 584
 585   if(preview_data->current_page) {
 586     preview_data->rendering = TRUE;
 587     gtk_widget_set_sensitive(preview_data->close, FALSE);
 588     int cur = GPOINTER_TO_INT(preview_data->current_page->data);
 589     gchar *str;
 590     str = g_strdup_printf(_("Page %d"), cur+1);
 591     gtk_label_set_text(GTK_LABEL(preview_data->page_nr_label), str);
 592     g_free(str);
 593     gtk_print_operation_preview_render_page(preview_data->preview,
 594                                             GPOINTER_TO_INT
 595                                             (preview_data->current_page->data));
 596
 597     gtk_widget_set_sensitive(preview_data->first, preview_data->current_page->prev != NULL);
 598     gtk_widget_set_sensitive(preview_data->previous, preview_data->current_page->prev != NULL);
 599     gtk_widget_set_sensitive(preview_data->next, preview_data->current_page->next != NULL);
 600     gtk_widget_set_sensitive(preview_data->last, preview_data->current_page->next != NULL);
 601     gtk_widget_set_sensitive(preview_data->close, TRUE);
 602     preview_data->rendering = FALSE;
 603
 604   }
 605   return TRUE;
 606 }
 607
 608 static void cb_preview_go_first(GtkButton *button, gpointer data)
 609 {
 610   PreviewData *preview_data = (PreviewData*) data;
 611   preview_data->current_page = preview_data->pages_to_print;
 612   gtk_widget_queue_draw(preview_data->area);
 613 }
 614
 615 static void cb_preview_go_previous(GtkButton *button, gpointer data)
 616 {
 617   GList *next;
 618   PreviewData *preview_data = (PreviewData*) data;
 619   next = g_list_previous(preview_data->current_page);
 620   if(next)
 621     preview_data->current_page = next;
 622   gtk_widget_queue_draw(preview_data->area);
 623 }
 624
 625 static void cb_preview_go_next(GtkButton *button, gpointer data)
 626 {
 627   GList *next;
 628   PreviewData *preview_data = (PreviewData*) data;
 629   next = g_list_next(preview_data->current_page);
 630   if(next)
 631     preview_data->current_page = next;
 632   gtk_widget_queue_draw(preview_data->area);
 633 }
 634
 635 static void cb_preview_go_last(GtkButton *button, gpointer data)
 636 {
 637   PreviewData *preview_data = (PreviewData*) data;
 638   preview_data->current_page = g_list_last(preview_data->current_page);
 639   gtk_widget_queue_draw(preview_data->area);
 640 }
 641
 642 static void cb_preview_btn_close(GtkButton *button, gpointer data)
 643 {
 644   PreviewData *preview_data = (PreviewData *)data;
 645   if (preview_data->rendering)
 646     return;
 647   gtk_widget_destroy(preview_data->dialog);
 648 }
 649
 650 static void cb_preview_zoom_100(GtkButton *button, gpointer data)
 651 {
 652   PreviewData *preview_data = (PreviewData*) data;
 653   if(preview_data->print_data->zoom != 1.) {
 654     preview_data->print_data->zoom = 1.;
 655     gtk_widget_queue_draw(preview_data->area);
 656     printing_preview_update_zoom_sensitivity(preview_data);
 657   }
 658 }
 659
 660 static void cb_preview_zoom_fit(GtkButton *button, gpointer data)
 661 {
 662   PreviewData *preview_data = (PreviewData*) data;
 663   gdouble zoom_w;
 664   gdouble zoom_h;
 665
 666   zoom_w = ((gdouble)preview_data->scrolled_window->allocation.width) /
 667     ((gdouble)preview_data->page_width/preview_data->print_data->zoom +
 668      PREVIEW_SHADOW_OFFSET);
 669   zoom_h = ((gdouble)preview_data->scrolled_window->allocation.height) /
 670     ((gdouble)preview_data->page_height/preview_data->print_data->zoom +
 671      PREVIEW_SHADOW_OFFSET);
 672
 673   preview_data->print_data->zoom = MIN(zoom_w,zoom_h) - 0.01;
 674
 675   if(preview_data->print_data->zoom > PREVIEW_ZOOM_MAX)
 676     preview_data->print_data->zoom = PREVIEW_ZOOM_MAX;
 677   else if(preview_data->print_data->zoom < PREVIEW_ZOOM_MIN)
 678     preview_data->print_data->zoom = PREVIEW_ZOOM_MIN;
 679
 680   printing_preview_update_zoom_sensitivity(preview_data);
 681   gtk_widget_queue_draw(preview_data->area);
 682 }
 683
 684 static void cb_preview_zoom_in(GtkButton *button, gpointer data)
 685 {
 686   PreviewData *preview_data = (PreviewData*) data;
 687   gdouble new_zoom;
 688   new_zoom =  preview_data->print_data->zoom * PREVIEW_ZOOM_FAC;
 689   if(new_zoom <= PREVIEW_ZOOM_MAX) {
 690     preview_data->print_data->zoom = new_zoom;
 691     printing_preview_update_zoom_sensitivity(preview_data);
 692     gtk_widget_queue_draw(preview_data->area);
 693   }
 694 }
 695
 696 static void cb_preview_zoom_out(GtkButton *button, gpointer data)
 697 {
 698   PreviewData *preview_data = (PreviewData*) data;
 699   gdouble new_zoom;
 700   new_zoom =  preview_data->print_data->zoom / PREVIEW_ZOOM_FAC;
 701   if(new_zoom >= PREVIEW_ZOOM_MIN) {
 702     preview_data->print_data->zoom = new_zoom;
 703     printing_preview_update_zoom_sensitivity(preview_data);
 704     gtk_widget_queue_draw(preview_data->area);
 705   }
 706 }
 707
 708 static void cb_preview_request_page_setup(GtkPrintOperation *op,
 709                                           GtkPrintContext *context,
 710                                           gint page_nr,
 711                                           GtkPageSetup *setup,gpointer data)
 712 {
 713   GtkPaperSize *paper_size;
 714   GtkPaperSize *old_size;
 715   gdouble width;
 716   gdouble height;
 717   gdouble top_margin;
 718   gdouble bottom_margin;
 719   gdouble left_margin;
 720   gdouble right_margin;
 721
 722   PreviewData *preview_data = (PreviewData*) data;
 723
 724   old_size = gtk_page_setup_get_paper_size(setup);
 725   width  = gtk_paper_size_get_width(old_size,GTK_UNIT_INCH);
 726   height = gtk_paper_size_get_height(old_size,GTK_UNIT_INCH);
 727
 728   top_margin    = gtk_page_setup_get_top_margin(setup,GTK_UNIT_INCH);
 729   bottom_margin = gtk_page_setup_get_bottom_margin(setup,GTK_UNIT_INCH);
 730   left_margin   = gtk_page_setup_get_left_margin(setup,GTK_UNIT_INCH);
 731   right_margin  = gtk_page_setup_get_right_margin(setup,GTK_UNIT_INCH);
 732
 733   paper_size = gtk_paper_size_new_custom("preview paper", "preview_paper",
 734                                          width*preview_data->print_data->zoom,
 735                                          height*preview_data->print_data->zoom,
 736                                          GTK_UNIT_INCH);
 737   gtk_page_setup_set_paper_size(setup, paper_size);
 738   gtk_paper_size_free(paper_size);
 739
 740   gtk_page_setup_set_top_margin(setup,top_margin*preview_data->print_data->zoom,
 741                                 GTK_UNIT_INCH);
 742   gtk_page_setup_set_bottom_margin(setup,bottom_margin*preview_data->print_data->zoom,
 743                                    GTK_UNIT_INCH);
 744   gtk_page_setup_set_left_margin(setup,left_margin*preview_data->print_data->zoom,
 745                                  GTK_UNIT_INCH);
 746   gtk_page_setup_set_right_margin(setup,right_margin*preview_data->print_data->zoom,
 747                                   GTK_UNIT_INCH);
 748 }
 749
 750 static void printing_textview_cb_begin_print(GtkPrintOperation *op, GtkPrintContext *context,
 751                            gpointer user_data)
 752 {
 753   double width, height;
 754   int num_lines;
 755   double page_height;
 756   GList *page_breaks;
 757   PrintData *print_data;
 758   PangoFontDescription *desc;
 759   int start, ii;
 760   PangoLayoutIter *iter;
 761   double start_pos;
 762   double line_height =0.;
 763
 764   print_data = (PrintData*) user_data;
 765
 766   debug_print("Preparing print job...\n");
 767
 768   width  = gtk_print_context_get_width(context);
 769   height = gtk_print_context_get_height(context);
 770
 771   if (print_data->layout == NULL)
 772     print_data->layout = gtk_print_context_create_pango_layout(context);
 773
 774   if(prefs_common.use_different_print_font)
 775     desc = pango_font_description_from_string(prefs_common.printfont);
 776   else
 777     desc = pango_font_description_copy(
 778                 pango_context_get_font_description(print_data->pango_context));
 779
 780   pango_layout_set_font_description(print_data->layout, desc);
 781   pango_font_description_free(desc);
 782
 783   pango_layout_set_width(print_data->layout, width * PANGO_SCALE);
 784   pango_layout_set_text(print_data->layout, (char *)print_data->to_print, -1);
 785
 786   printing_layout_set_text_attributes(print_data, context);
 787
 788   num_lines = pango_layout_get_line_count(print_data->layout);
 789
 790   page_breaks = NULL;
 791   page_height = 0;
 792   start = 0;
 793   ii = 0;
 794   start_pos = 0.;
 795   iter = pango_layout_get_iter(print_data->layout);
 796   do {
 797     PangoRectangle logical_rect;
 798     PangoLayoutLine *line;
 799     PangoAttrShape *attr = NULL;
 800     int baseline;
 801
 802     if(ii >= start) {
 803       line = pango_layout_iter_get_line(iter);
 804
 805       pango_layout_iter_get_line_extents(iter, NULL, &logical_rect);
 806       baseline = pango_layout_iter_get_baseline(iter);
 807
 808       if ((attr = g_hash_table_lookup(print_data->images, GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) {
 809         line_height = (double)gdk_pixbuf_get_height(GDK_PIXBUF(attr->data));
 810       } else {
 811         line_height = ((double)logical_rect.height) / PANGO_SCALE;
 812       }
 813     }
 814     if((page_height + line_height) > height) {
 815       page_breaks = g_list_prepend(page_breaks, GINT_TO_POINTER(ii));
 816       page_height = 0;
 817     }
 818
 819     page_height += line_height;
 820     ii++;
 821   } while(ii < num_lines && pango_layout_iter_next_line(iter));
 822   pango_layout_iter_free(iter);
 823
 824   page_breaks = g_list_reverse(page_breaks);
 825   print_data->npages = g_list_length(page_breaks) + 1;
 826   print_data->page_breaks = page_breaks;
 827
 828   gtk_print_operation_set_n_pages(op, print_data->npages);
 829
 830   debug_print("Starting print job...\n");
 831 }
 832
 833 static cairo_surface_t *pixbuf_to_surface(GdkPixbuf *pixbuf)
 834 {
 835           cairo_surface_t *surface;
 836           cairo_format_t format;
 837           static const cairo_user_data_key_t key;
 838           guchar *pixels = g_malloc(
 839                                 4*
 840                                 gdk_pixbuf_get_width(pixbuf)*
 841                                 gdk_pixbuf_get_height(pixbuf));
 842           guchar *src_pixels = gdk_pixbuf_get_pixels (pixbuf);
 843           gint width = gdk_pixbuf_get_width(pixbuf);
 844           gint height = gdk_pixbuf_get_height(pixbuf);
 845           gint nchans = gdk_pixbuf_get_n_channels (pixbuf);
 846           gint stride = gdk_pixbuf_get_rowstride (pixbuf);
 847           gint j;
 848
 849           if (nchans == 3)
 850             format = CAIRO_FORMAT_RGB24;
 851           else
 852             format = CAIRO_FORMAT_ARGB32;
 853           surface = cairo_image_surface_create_for_data (pixels,
 854                                                 format, width, height, 4*width);
 855           cairo_surface_set_user_data (surface, &key,
 856                 pixels, (cairo_destroy_func_t)g_free);
 857
 858           for (j = height; j; j--) {
 859                 guchar *p = src_pixels;
 860                 guchar *q = pixels;
 861
 862                 if (nchans == 3) {
 863                         guchar *end = p + 3 * width;
 864
 865                         while (p < end) {
 866 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 867                                 q[0] = p[2];
 868                                 q[1] = p[1];
 869                                 q[2] = p[0];
 870 #else
 871                                 q[1] = p[0];
 872                                 q[2] = p[1];
 873                                 q[3] = p[2];
 874 #endif
 875                                 p += 3;
 876                                 q += 4;
 877                         }
 878                 } else {
 879                         guchar *end = p + 4 * width;
 880                         guint t1,t2,t3;
 881
 882 #define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END
 883
 884                         while (p < end) {
 885 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 886                                 MULT(q[0], p[2], p[3], t1);
 887                                 MULT(q[1], p[1], p[3], t2);
 888                                 MULT(q[2], p[0], p[3], t3);
 889                                 q[3] = p[3];
 890 #else
 891                                 q[0] = p[3];
 892                                 MULT(q[1], p[0], p[3], t1);
 893                                 MULT(q[2], p[1], p[3], t2);
 894                                 MULT(q[3], p[2], p[3], t3);
 895 #endif
 896
 897                                 p += 4;
 898                                 q += 4;
 899                         }
 900
 901 #undef MULT
 902                 }
 903
 904                 src_pixels += stride;
 905                 pixels += 4 * width;
 906         }
 907
 908         return surface;
 909 }
 910
 911 static void printing_textview_cb_draw_page(GtkPrintOperation *op, GtkPrintContext *context,
 912                          int page_nr, gpointer user_data)
 913 {
 914   cairo_t *cr;
 915   PrintData *print_data;
 916   int start, end, ii;
 917   GList *pagebreak;
 918   PangoLayoutIter *iter;
 919   double start_pos;
 920   gboolean notlast = TRUE;
 921
 922   print_data = (PrintData*) user_data;
 923
 924   if (page_nr == 0) {
 925     start = 0;
 926   } else {
 927     pagebreak = g_list_nth(print_data->page_breaks, page_nr - 1);
 928     start = GPOINTER_TO_INT(pagebreak->data);
 929   }
 930
 931   pagebreak = g_list_nth(print_data->page_breaks, page_nr);
 932   if(pagebreak == NULL)
 933     end = pango_layout_get_line_count(print_data->layout);
 934   else
 935     end = GPOINTER_TO_INT(pagebreak->data);
 936
 937   cr = gtk_print_context_get_cairo_context(context);
 938   cairo_scale(cr, print_data->zoom, print_data->zoom);
 939   cairo_set_source_rgb(cr, 0., 0., 0.);
 940
 941   ii = 0;
 942   start_pos = 0.;
 943   iter = pango_layout_get_iter(print_data->layout);
 944   do {
 945     PangoRectangle logical_rect;
 946     PangoLayoutLine *line;
 947     PangoAttrShape *attr = NULL;
 948     int baseline;
 949
 950     if(ii >= start) {
 951       line = pango_layout_iter_get_line(iter);
 952
 953       pango_layout_iter_get_line_extents(iter, NULL, &logical_rect);
 954       baseline = pango_layout_iter_get_baseline(iter);
 955
 956       if(ii == start)
 957         start_pos = ((double)logical_rect.y) / PANGO_SCALE;
 958
 959       cairo_move_to(cr,
 960                     ((double)logical_rect.x) / PANGO_SCALE,
 961                     ((double)baseline) / PANGO_SCALE - start_pos);
 962
 963       if ((attr = g_hash_table_lookup(print_data->images, GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) {
 964           cairo_surface_t *surface;
 965
 966           surface = pixbuf_to_surface(GDK_PIXBUF(attr->data));
 967           cairo_set_source_surface (cr, surface,
 968                 ((double)logical_rect.x) / PANGO_SCALE,
 969                 ((double)baseline) / PANGO_SCALE - start_pos);
 970           cairo_paint (cr);
 971           cairo_surface_destroy (surface);
 972       } else {
 973         pango_cairo_show_layout_line(cr, line);
 974       }
 975     }
 976     ii++;
 977   } while(ii < end && (notlast = pango_layout_iter_next_line(iter)));
 978   pango_layout_iter_free(iter);
 979   debug_print("Sent page %d to printer\n", page_nr+1);
 980 }
 981
 982 static void printing_layout_set_text_attributes(PrintData *print_data, GtkPrintContext *context)
 983 {
 984   GtkTextIter iter;
 985   PangoAttrList *attr_list;
 986   PangoAttribute *attr;
 987   GSList *open_attrs, *attr_walk;
 988   GtkTextView *text_view = GTK_TEXT_VIEW(print_data->renderer_data);
 989   GtkTextBuffer *buffer = gtk_text_view_get_buffer(text_view);
 990
 991   attr_list = pango_attr_list_new();
 992   if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
 993     gtk_text_buffer_get_start_iter(buffer, &iter);
 994   } else {
 995     gtk_text_buffer_get_iter_at_offset(buffer, &iter, print_data->sel_start);
 996   }
 997
 998   open_attrs = NULL;
 999   do {
1000     gboolean fg_set, bg_set, under_set, strike_set;
1001     GSList *tags, *tag_walk;
1002     GtkTextTag *tag;
1003     GdkColor *color;
1004     PangoUnderline underline;
1005     gboolean strikethrough;
1006     GdkPixbuf *image;
1007
1008     if (prefs_common.print_imgs && (image = gtk_text_iter_get_pixbuf(&iter)) != NULL) {
1009       PangoRectangle rect = {0, 0, 0, 0};
1010       gint startpos = printing_text_iter_get_offset_bytes(print_data, &iter);
1011       gint h = gdk_pixbuf_get_height(image);
1012       gint w = gdk_pixbuf_get_width(image);
1013       gint a_h = gtk_print_context_get_height(context);
1014       gint a_w = gtk_print_context_get_width(context);
1015       gint r_h, r_w;
1016       GdkPixbuf *scaled = NULL;
1017       image_viewer_get_resized_size(w, h, a_w, a_h, &r_w, &r_h);
1018       rect.x = 0;
1019       rect.y = 0;
1020       rect.width = r_w * PANGO_SCALE;
1021       rect.height = r_h * PANGO_SCALE;
1022
1023       scaled = gdk_pixbuf_scale_simple(image, r_w, r_h, GDK_INTERP_BILINEAR);
1024       attr = pango_attr_shape_new_with_data (&rect, &rect,
1025                scaled, NULL, NULL);
1026       attr->start_index = startpos;
1027       attr->end_index = startpos+1;
1028       pango_attr_list_insert(attr_list, attr);
1029       g_hash_table_insert(print_data->images, GINT_TO_POINTER(startpos), attr);
1030       print_data->img_cnt++;
1031     }
1032
1033     if(gtk_text_iter_ends_tag(&iter, NULL)) {
1034       PangoAttrColor *attr_color;
1035       PangoAttrInt   *attr_int;
1036
1037       tags = gtk_text_iter_get_toggled_tags(&iter, FALSE);
1038       for(tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) {
1039         gboolean found;
1040
1041         tag = GTK_TEXT_TAG(tag_walk->data);
1042         g_object_get(G_OBJECT(tag),
1043                      "background-set", &bg_set,
1044                      "foreground-set", &fg_set,
1045                      "underline-set",&under_set,
1046                      "strikethrough-set", &strike_set,
1047                      NULL);
1048
1049         if(fg_set) {
1050           found = FALSE;
1051           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1052             attr = (PangoAttribute*)attr_walk->data;
1053             if(attr->klass->type == PANGO_ATTR_FOREGROUND) {
1054               attr_color = (PangoAttrColor*) attr;
1055               g_object_get(G_OBJECT(tag), "foreground_gdk", &color, NULL);
1056               if(printing_is_pango_gdk_color_equal(&(attr_color->color), color)) {
1057                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1058                 pango_attr_list_insert(attr_list, attr);
1059                 found = TRUE;
1060                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1061                 break;
1062               }
1063               if (color)
1064                 gdk_color_free(color);
1065             }
1066           }
1067           if(!found)
1068             debug_print("Error generating attribute list.\n");
1069         }
1070
1071         if(bg_set) {
1072           found = FALSE;
1073           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1074             attr = (PangoAttribute*)attr_walk->data;
1075             if(attr->klass->type == PANGO_ATTR_BACKGROUND) {
1076               attr_color = (PangoAttrColor*) attr;
1077               g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL);
1078               if(printing_is_pango_gdk_color_equal(&(attr_color->color), color)) {
1079                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1080                 pango_attr_list_insert(attr_list, attr);
1081                 found = TRUE;
1082                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1083                 break;
1084               }
1085               if (color)
1086                 gdk_color_free(color);
1087             }
1088           }
1089           if(!found)
1090             debug_print("Error generating attribute list.\n");
1091         }
1092
1093         if(under_set) {
1094           found = FALSE;
1095           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1096             attr = (PangoAttribute*)attr_walk->data;
1097             if(attr->klass->type == PANGO_ATTR_UNDERLINE) {
1098               attr_int = (PangoAttrInt*)attr;
1099               g_object_get(G_OBJECT(tag), "underline", &underline, NULL);
1100               if(attr_int->value == underline) {
1101                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1102                 pango_attr_list_insert(attr_list, attr);
1103                 found = TRUE;
1104                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1105                 break;
1106               }
1107             }
1108           }
1109           if(!found)
1110             debug_print("Error generating attribute list.\n");
1111         }
1112
1113         if(strike_set) {
1114           found = FALSE;
1115           for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1116             attr = (PangoAttribute*)attr_walk->data;
1117             if(attr->klass->type == PANGO_ATTR_STRIKETHROUGH) {
1118               attr_int = (PangoAttrInt*)attr;
1119               g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL);
1120               if(attr_int->value == strikethrough) {
1121                 attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1122                 pango_attr_list_insert(attr_list, attr);
1123                 found = TRUE;
1124                 open_attrs = g_slist_delete_link(open_attrs, attr_walk);
1125                 break;
1126               }
1127             }
1128           }
1129           if(!found)
1130             debug_print("Error generating attribute list.\n");
1131         }
1132
1133       }
1134       g_slist_free(tags);
1135     }
1136
1137     if(gtk_text_iter_begins_tag(&iter, NULL)) {
1138       tags = gtk_text_iter_get_toggled_tags(&iter, TRUE);
1139       for(tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) {
1140         tag = GTK_TEXT_TAG(tag_walk->data);
1141         g_object_get(G_OBJECT(tag),
1142                      "background-set", &bg_set,
1143                      "foreground-set", &fg_set,
1144                      "underline-set", &under_set,
1145                      "strikethrough-set", &strike_set,
1146                      NULL);
1147         if(fg_set) {
1148           g_object_get(G_OBJECT(tag), "foreground-gdk", &color, NULL);
1149           attr = pango_attr_foreground_new(color->red,color->green,color->blue);
1150           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1151           open_attrs = g_slist_prepend(open_attrs, attr);
1152         }
1153         if(bg_set) {
1154           g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL);
1155           attr = pango_attr_background_new(color->red,color->green,color->blue);
1156           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1157           open_attrs = g_slist_prepend(open_attrs, attr);
1158         }
1159         if(under_set) {
1160           g_object_get(G_OBJECT(tag), "underline", &underline, NULL);
1161           attr = pango_attr_underline_new(underline);
1162           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1163           open_attrs = g_slist_prepend(open_attrs, attr);
1164         }
1165         if(strike_set) {
1166           g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL);
1167           attr = pango_attr_strikethrough_new(strikethrough);
1168           attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1169           open_attrs = g_slist_prepend(open_attrs, attr);
1170         }
1171       }
1172       g_slist_free(tags);
1173     }
1174
1175   } while(!gtk_text_iter_is_end(&iter) && gtk_text_iter_forward_to_tag_toggle(&iter, NULL));
1176
1177   /* close all open attributes */
1178   for(attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
1179     attr = (PangoAttribute*) attr_walk->data;
1180     attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
1181     pango_attr_list_insert(attr_list, attr);
1182   }
1183   g_slist_free(open_attrs);
1184
1185   pango_layout_set_attributes(print_data->layout, attr_list);
1186   pango_attr_list_unref(attr_list);
1187 }
1188
1189 static gboolean printing_is_pango_gdk_color_equal(PangoColor *p, GdkColor *g)
1190 {
1191   return ((p->red == g->red) && (p->green == g->green) && (p->blue == g->blue));
1192 }
1193
1194 /* Pango has it's attribute in bytes, but GtkTextIter gets only an offset
1195  * in characters, so here we're returning an offset in bytes.
1196  */
1197 static gint printing_text_iter_get_offset_bytes(PrintData *print_data, const GtkTextIter *iter)
1198 {
1199   gint off_chars;
1200   gint off_bytes;
1201   gchar *text;
1202   GtkTextIter start;
1203
1204   off_chars = gtk_text_iter_get_offset(iter);
1205   if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
1206     gtk_text_buffer_get_start_iter(gtk_text_iter_get_buffer(iter), &start);
1207   } else {
1208     gtk_text_buffer_get_iter_at_offset(gtk_text_iter_get_buffer(iter), &start, print_data->sel_start);
1209   }
1210   text = gtk_text_iter_get_text(&start, iter);
1211   off_bytes = strlen(text);
1212   g_free(text);
1213   return off_bytes;
1214 }
1215
1216 static void printing_preview_update_zoom_sensitivity(PreviewData *preview_data)
1217 {
1218   if((preview_data->print_data->zoom * PREVIEW_ZOOM_FAC) > PREVIEW_ZOOM_MAX)
1219     gtk_widget_set_sensitive(preview_data->zoom_in, FALSE);
1220   else
1221     gtk_widget_set_sensitive(preview_data->zoom_in, TRUE);
1222
1223   if((preview_data->print_data->zoom / PREVIEW_ZOOM_FAC) < PREVIEW_ZOOM_MIN)
1224     gtk_widget_set_sensitive(preview_data->zoom_out, FALSE);
1225   else
1226     gtk_widget_set_sensitive(preview_data->zoom_out, TRUE);
1227 }
1228
1229 #endif /* GTK+ >= 2.10.0 */