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claws-mail/src/printing.c
Holger Berndt 0f58daf7dc 2009-11-21 [holger] 3.7.3cvs19 
* src/printing.c
		Modify cairo clip handling in preview windows,
		to prevent print preview windows from being blank
		with GTK+ 2.18. Follow recommendation of the GTK+
		documentation (section "Migrating to client side windows")
		and create a new cairo context for each expose event.
2009-11-21 02:41:37 +00:00

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/* Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
* Copyright (C) 2007-2009 Holger Berndt <hb@claws-mail.org>,
* Colin Leroy <colin@colino.net>, and the Claws Mail team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "defs.h"
#include "printing.h"
#include "image_viewer.h"
#if GTK_CHECK_VERSION(2,10,0) && !defined(USE_GNOMEPRINT)
#include "gtkutils.h"
#include "toolbar.h"
#include "prefs_common.h"
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <pango/pango.h>
#include <string.h>
#include <math.h>
struct _PrintData {
PrintRenderer *renderer;
gpointer renderer_data;
PangoLayout *layout;
PangoContext *pango_context;
gpointer to_print;
GList *page_breaks;
guint npages;
gint sel_start;
gint sel_end;
GHashTable *images;
gint img_cnt;
gdouble zoom;
gdouble ypos_line;
};
typedef struct {
GtkPrintOperation *op;
GtkPrintOperationPreview *preview;
GtkWidget *dialog;
GtkWidget *scrolled_window;
GtkWidget *area;
PrintData *print_data;
GtkWidget *page_nr_label;
GList *pages_to_print;
GList *current_page;
GtkWidget *first;
GtkWidget *next;
GtkWidget *previous;
GtkWidget *last;
GtkWidget *close;
GtkWidget *zoom_100;
GtkWidget *zoom_fit;
GtkWidget *zoom_in;
GtkWidget *zoom_out;
gboolean rendering;
gint page_width;
gint page_height;
GtkPrintContext *context;
} PreviewData;
/* callbacks */
static void printing_textview_cb_begin_print(GtkPrintOperation*,
GtkPrintContext*, gpointer);
static void printing_textview_cb_draw_page(GtkPrintOperation*,
GtkPrintContext*, gint,
gpointer);
static gboolean cb_preview(GtkPrintOperation*, GtkPrintOperationPreview*,
GtkPrintContext*, GtkWindow*, gpointer);
static void cb_preview_destroy(GtkWindow*, gpointer);
static gboolean cb_preview_close(GtkWidget*, GdkEventAny*, gpointer);
static void cb_preview_size_allocate(GtkWidget*, GtkAllocation*);
static void cb_preview_ready(GtkPrintOperationPreview*,
GtkPrintContext*, gpointer);
static gboolean cb_preview_expose(GtkWidget*, GdkEventExpose*, gpointer);
static void cb_preview_got_page_size(GtkPrintOperationPreview*,
GtkPrintContext*,
GtkPageSetup*, gpointer);
static void cb_preview_go_first(GtkButton*, gpointer);
static void cb_preview_go_previous(GtkButton*, gpointer);
static void cb_preview_go_next(GtkButton*, gpointer);
static void cb_preview_go_last(GtkButton*, gpointer);
static void cb_preview_btn_close(GtkButton*, gpointer);
static void cb_preview_zoom_100(GtkButton*, gpointer);
static void cb_preview_zoom_fit(GtkButton*, gpointer);
static void cb_preview_zoom_in(GtkButton*, gpointer);
static void cb_preview_zoom_out(GtkButton*, gpointer);
static void cb_preview_request_page_setup(GtkPrintOperation*,
GtkPrintContext*,
gint,GtkPageSetup*,gpointer);
static void printing_preview_update_zoom_sensitivity(PreviewData*);
/* variables */
static GtkPrintSettings *settings = NULL;
static GtkPageSetup *page_setup = NULL;
/* other static functions */
static void printing_layout_set_text_attributes(PrintData*, GtkPrintContext *, gboolean *);
static gboolean printing_is_pango_gdk_color_equal(PangoColor*, GdkColor*);
static gint printing_text_iter_get_offset_bytes(PrintData *, const GtkTextIter*);
#define PAGE_MARGIN_STORAGE_UNIT GTK_UNIT_MM
#define PREVIEW_SCALE 72
#define PREVIEW_SHADOW_OFFSET 3
#define PREVIEW_ZOOM_FAC 1.41
#define PREVIEW_ZOOM_MAX 10.
#define PREVIEW_ZOOM_MIN 0.2
static void free_pixbuf(gpointer key, gpointer value, gpointer data)
{
PangoAttrShape *attr = (PangoAttrShape *) value;
g_object_unref(G_OBJECT(attr->data));
}
gpointer printing_get_renderer_data(PrintData *print_data)
{
if (!print_data)
return NULL;
return print_data->renderer_data;
}
gdouble printing_get_zoom(PrintData *print_data)
{
if (!print_data)
return 1.0;
return print_data->zoom;
}
void printing_set_n_pages(PrintData *print_data, gint n_pages)
{
if (!print_data)
return;
print_data->npages = n_pages;
}
GtkPrintSettings *printing_get_settings(void)
{
if (settings == NULL) {
settings = gtk_print_settings_new();
gtk_print_settings_set_use_color(settings, prefs_common.print_use_color);
gtk_print_settings_set_collate(settings, prefs_common.print_use_collate);
gtk_print_settings_set_reverse(settings, prefs_common.print_use_reverse);
gtk_print_settings_set_duplex(settings, prefs_common.print_use_duplex);
}
return settings;
}
void printing_store_settings(GtkPrintSettings *new_settings)
{
if (settings != NULL)
g_object_unref(settings);
settings = g_object_ref(new_settings);
prefs_common.print_use_color = gtk_print_settings_get_use_color(settings);
prefs_common.print_use_collate = gtk_print_settings_get_collate(settings);
prefs_common.print_use_reverse = gtk_print_settings_get_reverse(settings);
prefs_common.print_use_duplex = gtk_print_settings_get_duplex(settings);
}
GtkPageSetup *printing_get_page_setup(void)
{
if (page_setup == NULL) {
gboolean read_from_file;
char *page_setup_filename;
GKeyFile *keyfile;
gboolean key_file_read;
page_setup = gtk_page_setup_new();
read_from_file = FALSE;
#if GTK_CHECK_VERSION(2,14,0)
/* try reading the page setup from file */
page_setup_filename = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
PRINTING_PAGE_SETUP_STORAGE_FILE, NULL);
keyfile = g_key_file_new();
key_file_read = g_key_file_load_from_file(keyfile, page_setup_filename,
0, NULL);
g_free(page_setup_filename);
if (key_file_read)
read_from_file = gtk_page_setup_load_key_file(page_setup, keyfile,
NULL, NULL);
g_key_file_free(keyfile);
if (read_from_file) {
debug_print("Printing: Read page setup from key file\n");
} else {
debug_print("Printing: Could not read page setup from key file\n");
}
#else
key_file_read = FALSE;
keyfile = NULL;
page_setup_filename = NULL;
#endif
/* if reading from file did not work, or has not been tried (GTK+ < 2.14), use prefs */
if (!read_from_file) {
/* paper size */
if (prefs_common.print_paper_type &&
*prefs_common.print_paper_type) {
GtkPaperSize *paper = gtk_paper_size_new(prefs_common.print_paper_type);
gtk_page_setup_set_paper_size(page_setup, paper);
gtk_paper_size_free(paper);
}
/* orientation */
gtk_page_setup_set_orientation(page_setup,
prefs_common.print_paper_orientation);
/* margins */
if (prefs_common.print_margin_top != -1)
gtk_page_setup_set_top_margin(page_setup,
0.01*prefs_common.print_margin_top,
PAGE_MARGIN_STORAGE_UNIT);
if (prefs_common.print_margin_bottom != -1)
gtk_page_setup_set_bottom_margin(page_setup,
0.01*prefs_common.print_margin_bottom,
PAGE_MARGIN_STORAGE_UNIT);
if (prefs_common.print_margin_left != -1)
gtk_page_setup_set_left_margin(page_setup,
0.01*prefs_common.print_margin_left,
PAGE_MARGIN_STORAGE_UNIT);
if (prefs_common.print_margin_right != -1)
gtk_page_setup_set_right_margin(page_setup,
0.01*prefs_common.print_margin_right,
PAGE_MARGIN_STORAGE_UNIT);
}
}
return page_setup;
}
void printing_print_full(GtkWindow *parent, PrintRenderer *renderer, gpointer renderer_data,
gint sel_start, gint sel_end)
{
GtkPrintOperation *op;
GtkPrintOperationResult res;
PrintData *print_data;
op = gtk_print_operation_new();
print_data = g_new0(PrintData,1);
print_data->renderer = renderer;
print_data->renderer_data = renderer_data;
print_data->sel_start = sel_start;
print_data->sel_end = sel_end;
print_data->zoom = 1.;
print_data->images = g_hash_table_new(g_direct_hash, g_direct_equal);
print_data->pango_context = renderer->get_pango_context(renderer_data);
print_data->to_print = renderer->get_data_to_print(renderer_data, sel_start, sel_end);
printing_get_settings();
printing_get_page_setup();
/* Config for printing */
gtk_print_operation_set_print_settings(op, settings);
gtk_print_operation_set_default_page_setup(op, page_setup);
#if GTK_CHECK_VERSION(2, 18, 0)
/* enable Page Size and Orientation in the print dialog */
gtk_print_operation_set_embed_page_setup(op, TRUE);
#endif
/* signals */
g_signal_connect(op, "begin_print", G_CALLBACK(renderer->cb_begin_print), print_data);
g_signal_connect(op, "draw_page", G_CALLBACK(renderer->cb_draw_page), print_data);
g_signal_connect(op, "preview", G_CALLBACK(cb_preview), print_data);
/* Start printing process */
res = gtk_print_operation_run(op, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
parent, NULL);
if (res == GTK_PRINT_OPERATION_RESULT_ERROR) {
GError *error = NULL;
gtk_print_operation_get_error(op, &error);
debug_print("Error printing message: %s\n",
error ? error->message : "no details");
} else if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
/* store settings for next printing session */
printing_store_settings(gtk_print_operation_get_print_settings(op));
}
g_hash_table_foreach(print_data->images, free_pixbuf, NULL);
g_hash_table_destroy(print_data->images);
if (print_data->to_print)
g_free(print_data->to_print);
g_list_free(print_data->page_breaks);
if (print_data->layout)
g_object_unref(print_data->layout);
g_free(print_data);
g_object_unref(op);
debug_print("printing_print finished\n");
}
static PangoContext *printing_textview_get_pango_context(gpointer data)
{
return gtk_widget_get_pango_context(GTK_WIDGET(data));
}
static gpointer printing_textview_get_data_to_print(gpointer data, gint sel_start, gint sel_end)
{
GtkTextView *text_view = GTK_TEXT_VIEW(data);
GtkTextBuffer *buffer = gtk_text_view_get_buffer(text_view);
GtkTextIter start, end;
if (sel_start < 0 || sel_end <= sel_start) {
gtk_text_buffer_get_start_iter(buffer, &start);
gtk_text_buffer_get_end_iter(buffer, &end);
} else {
gtk_text_buffer_get_iter_at_offset(buffer, &start, sel_start);
gtk_text_buffer_get_iter_at_offset(buffer, &end, sel_end);
}
return gtk_text_buffer_get_text(buffer, &start, &end, FALSE);
}
void printing_print(GtkTextView *text_view, GtkWindow *parent, gint sel_start, gint sel_end)
{
PrintRenderer *textview_renderer = g_new0(PrintRenderer, 1);
textview_renderer->get_pango_context = printing_textview_get_pango_context;
textview_renderer->get_data_to_print = printing_textview_get_data_to_print;
textview_renderer->cb_begin_print = printing_textview_cb_begin_print;
textview_renderer->cb_draw_page = printing_textview_cb_draw_page;
printing_print_full(parent, textview_renderer, text_view, sel_start, sel_end);
g_free(textview_renderer);
}
void printing_page_setup(GtkWindow *parent)
{
GtkPageSetup *new_page_setup;
char *keyfile;
keyfile = NULL;
printing_get_settings();
printing_get_page_setup();
new_page_setup = gtk_print_run_page_setup_dialog(parent,page_setup,settings);
if (page_setup)
g_object_unref(page_setup);
page_setup = new_page_setup;
g_free(prefs_common.print_paper_type);
prefs_common.print_paper_type = g_strdup(gtk_paper_size_get_name(
gtk_page_setup_get_paper_size(page_setup)));
prefs_common.print_paper_orientation = gtk_page_setup_get_orientation(page_setup);
/* store 100th millimeters */
prefs_common.print_margin_top = (int) (100*gtk_page_setup_get_top_margin(page_setup,
PAGE_MARGIN_STORAGE_UNIT));
prefs_common.print_margin_bottom = (int) (100*gtk_page_setup_get_bottom_margin(page_setup,
PAGE_MARGIN_STORAGE_UNIT));
prefs_common.print_margin_left = (int) (100*gtk_page_setup_get_left_margin(page_setup,
PAGE_MARGIN_STORAGE_UNIT));
prefs_common.print_margin_right = (int) (100*gtk_page_setup_get_right_margin(page_setup,
PAGE_MARGIN_STORAGE_UNIT));
#if GTK_CHECK_VERSION(2,14,0)
/* save to file */
keyfile = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
PRINTING_PAGE_SETUP_STORAGE_FILE, NULL);
if (!gtk_page_setup_to_file(page_setup, keyfile, NULL)) {
debug_print("Printing: Could not store page setup in file `%s'\n", keyfile);
}
g_free(keyfile);
#endif
}
static gboolean cb_preview(GtkPrintOperation *operation,
GtkPrintOperationPreview *preview,
GtkPrintContext *context,
GtkWindow *parent,
gpointer data)
{
PrintData *print_data;
cairo_t *cr;
PreviewData *preview_data;
GtkWidget *vbox;
GtkWidget *toolbar;
GtkWidget *da;
GtkWidget *sw;
GtkWidget *page;
GtkToolItem *separator;
static GdkGeometry geometry;
GtkWidget *dialog = NULL;
GtkWidget *statusbar = gtk_hbox_new(2, FALSE);
CLAWS_TIP_DECL();
debug_print("Creating internal print preview\n");
print_data = (PrintData*) data;
preview_data = g_new0(PreviewData,1);
preview_data->print_data = print_data;
preview_data->op = g_object_ref(operation);
preview_data->preview = preview;
/* Window */
dialog = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "print_preview");
preview_data->dialog = dialog;
if (!geometry.min_height) {
geometry.min_width = 600;
geometry.min_height = 400;
}
gtk_window_set_geometry_hints(GTK_WINDOW(dialog), NULL, &geometry,
GDK_HINT_MIN_SIZE);
gtk_widget_set_size_request(dialog, prefs_common.print_previewwin_width,
prefs_common.print_previewwin_height);
gtk_window_set_title(GTK_WINDOW(dialog), _("Print preview"));
/* vbox */
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_add(GTK_CONTAINER(dialog), vbox);
/* toolbar */
toolbar = gtk_toolbar_new();
#if (GTK_CHECK_VERSION(2,16,0))
gtk_orientable_set_orientation(GTK_ORIENTABLE(toolbar), GTK_ORIENTATION_HORIZONTAL);
#else
gtk_toolbar_set_orientation(GTK_TOOLBAR(toolbar), GTK_ORIENTATION_HORIZONTAL);
#endif
switch (prefs_common.toolbar_style) {
case TOOLBAR_ICON:
gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS);
break;
case TOOLBAR_TEXT:
gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_TEXT);
break;
case TOOLBAR_BOTH_HORIZ:
gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH_HORIZ);
break;
case TOOLBAR_BOTH:
default:
gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH);
}
gtk_toolbar_set_show_arrow(GTK_TOOLBAR(toolbar), TRUE);
gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0);
#if !(GTK_CHECK_VERSION(2,12,0))
#define CLAWS_SET_TOOL_ITEM_TIP(widget,tip) { \
gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(widget), GTK_TOOLTIPS(tips), \
tip, NULL); \
}
#else
#define CLAWS_SET_TOOL_ITEM_TIP(widget,tip) { \
gtk_tool_item_set_tooltip_text(GTK_TOOL_ITEM(widget), tip); \
}
#endif
#define TOOLBAR_ITEM(item,text,tooltip,cb,cbdata) { \
item = GTK_WIDGET(gtk_tool_button_new_from_stock(text)); \
gtk_tool_item_set_homogeneous(GTK_TOOL_ITEM(item), FALSE); \
gtk_tool_item_set_is_important(GTK_TOOL_ITEM(item), TRUE); \
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(item), -1); \
g_signal_connect (G_OBJECT(item), "clicked", G_CALLBACK(cb), cbdata); \
CLAWS_SET_TOOL_ITEM_TIP(GTK_TOOL_ITEM(item), \
tooltip); \
}
TOOLBAR_ITEM(preview_data->first, GTK_STOCK_GOTO_FIRST,
_("First page"), cb_preview_go_first, preview_data);
TOOLBAR_ITEM(preview_data->previous, GTK_STOCK_GO_BACK,
_("Previous page"), cb_preview_go_previous, preview_data);
page = gtk_label_new("");
gtk_widget_set_size_request(page, 100, -1);
preview_data->page_nr_label = page;
TOOLBAR_ITEM(preview_data->next, GTK_STOCK_GO_FORWARD,
_("Next page"), cb_preview_go_next, preview_data);
TOOLBAR_ITEM(preview_data->last, GTK_STOCK_GOTO_LAST,
_("Last page"), cb_preview_go_last, preview_data);
separator = gtk_separator_tool_item_new();
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1);
TOOLBAR_ITEM(preview_data->zoom_100, GTK_STOCK_ZOOM_100,
_("Zoom 100%"), cb_preview_zoom_100, preview_data);
TOOLBAR_ITEM(preview_data->zoom_fit, GTK_STOCK_ZOOM_FIT,
_("Zoom fit"), cb_preview_zoom_fit, preview_data);
TOOLBAR_ITEM(preview_data->zoom_in, GTK_STOCK_ZOOM_IN,
_("Zoom in"), cb_preview_zoom_in, preview_data);
TOOLBAR_ITEM(preview_data->zoom_out, GTK_STOCK_ZOOM_OUT,
_("Zoom out"), cb_preview_zoom_out, preview_data);
separator = gtk_separator_tool_item_new();
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1);
/* tooltip has to be NULL else it triggers an expose_event */
TOOLBAR_ITEM(preview_data->close, GTK_STOCK_CLOSE, NULL,
cb_preview_btn_close, preview_data);
gtk_widget_show(statusbar);
gtk_box_pack_start(GTK_BOX(vbox), statusbar, FALSE, FALSE, 0);
gtk_box_pack_start(GTK_BOX(statusbar), page, FALSE, FALSE, 0);
/* Drawing area */
sw = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_box_pack_start(GTK_BOX(vbox), sw, TRUE, TRUE, 0);
da = gtk_drawing_area_new();
gtk_widget_set_double_buffered(da, FALSE);
gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw),
da);
gtk_widget_realize(da);
preview_data->scrolled_window = sw;
preview_data->area = da;
/* cairo context */
cr = gdk_cairo_create(da->window);
gtk_print_context_set_cairo_context(context, cr, PREVIEW_SCALE, PREVIEW_SCALE);
cairo_destroy(cr);
/* signals */
g_signal_connect(dialog, "key_press_event",
G_CALLBACK(cb_preview_close), preview_data);
g_signal_connect(dialog, "size_allocate",
G_CALLBACK(cb_preview_size_allocate), NULL);
g_signal_connect(dialog, "destroy",G_CALLBACK(cb_preview_destroy),
preview_data);
g_signal_connect(preview, "ready", G_CALLBACK(cb_preview_ready),
preview_data);
g_signal_connect(preview, "got-page-size",
G_CALLBACK(cb_preview_got_page_size), preview_data);
g_signal_connect(operation, "request-page-setup",
G_CALLBACK(cb_preview_request_page_setup), preview_data);
gtk_widget_show_all(dialog);
return TRUE;
}
static void cb_preview_destroy(GtkWindow *window, gpointer data)
{
PreviewData *preview_data;
preview_data = (PreviewData*) data;
if (preview_data->rendering)
return;
debug_print("Preview window destroyed\n");
gtk_print_operation_preview_end_preview(preview_data->preview);
g_object_unref(preview_data->op);
g_list_free(preview_data->pages_to_print);
g_free(preview_data);
}
static gboolean cb_preview_close(GtkWidget *widget, GdkEventAny *event,
gpointer data)
{
PreviewData *preview_data = (PreviewData *)data;
if (event->type == GDK_KEY_PRESS)
if (((GdkEventKey *)event)->keyval != GDK_Escape)
return FALSE;
if (preview_data->rendering)
return FALSE;
gtk_widget_destroy(widget);
return FALSE;
}
static void cb_preview_size_allocate(GtkWidget *widget,
GtkAllocation *allocation)
{
cm_return_if_fail(allocation != NULL);
prefs_common.print_previewwin_width = allocation->width;
prefs_common.print_previewwin_height = allocation->height;
}
static void cb_preview_ready(GtkPrintOperationPreview *preview,
GtkPrintContext *context,
gpointer data)
{
PreviewData *preview_data;
gint iPage;
preview_data = (PreviewData*) data;
debug_print("preview_ready %d\n", preview_data->print_data->npages);
for (iPage = 0; iPage < (preview_data->print_data->npages); iPage++) {
if (gtk_print_operation_preview_is_selected(preview_data->preview, iPage)) {
preview_data->pages_to_print =
g_list_prepend(preview_data->pages_to_print,
GINT_TO_POINTER(iPage));
debug_print("want to print page %d\n",iPage+1);
}
}
preview_data->pages_to_print = g_list_reverse(preview_data->pages_to_print);
preview_data->current_page = preview_data->pages_to_print;
preview_data->context = context;
g_signal_connect(preview_data->area, "expose_event",
G_CALLBACK(cb_preview_expose),
preview_data);
gtk_widget_queue_draw(preview_data->area);
}
static void cb_preview_got_page_size(GtkPrintOperationPreview *preview,
GtkPrintContext *context,
GtkPageSetup *page_setup,
gpointer data)
{
PreviewData *preview_data;
GtkPageOrientation orientation;
GtkPaperSize *paper_size;
gint paper_width;
gint paper_height;
preview_data = (PreviewData*) data;
debug_print("got_page_size\n");
orientation = gtk_page_setup_get_orientation(page_setup);
paper_size = gtk_page_setup_get_paper_size(page_setup);
paper_width = (gint)(gtk_paper_size_get_width(paper_size, GTK_UNIT_INCH)
* PREVIEW_SCALE);
paper_height = (gint)(gtk_paper_size_get_height(paper_size, GTK_UNIT_INCH)
* PREVIEW_SCALE);
preview_data->page_width = paper_width;
preview_data->page_height = paper_height;
debug_print("w/h %d/%d\n", paper_width, paper_height);
gtk_widget_set_size_request(GTK_WIDGET(preview_data->area),
paper_width, paper_height);
}
static gboolean cb_preview_expose(GtkWidget *widget, GdkEventExpose *event,
gpointer data)
{
PreviewData *preview_data = data;
GdkGC *gc;
GdkColor white;
GdkColor black;
GdkColor gray;
cairo_t *cr;
debug_print("preview_expose (current %p)\n", preview_data->current_page);
gdk_window_clear(preview_data->area->window);
white.red = 65535;
white.green = 65535;
white.blue = 65535;
black.red = 0;
black.green = 0;
black.blue = 0;
gray.red = 32700;
gray.green = 32700;
gray.blue = 32700;
gc = gdk_gc_new(GDK_DRAWABLE(preview_data->area->window));
/* background */
gdk_gc_set_rgb_fg_color(gc, &gray);
gdk_draw_rectangle(preview_data->area->window, gc, TRUE, 0, 0,
preview_data->area->allocation.width,
preview_data->area->allocation.height);
/* shadow */
gdk_gc_set_rgb_fg_color(gc, &black);
gdk_draw_rectangle(preview_data->area->window, gc, TRUE,
PREVIEW_SHADOW_OFFSET, PREVIEW_SHADOW_OFFSET,
preview_data->page_width+PREVIEW_SHADOW_OFFSET,
preview_data->page_height+PREVIEW_SHADOW_OFFSET);
/* paper */
gdk_gc_set_rgb_fg_color(gc, &white);
gdk_draw_rectangle(preview_data->area->window, gc, TRUE, 0, 0,
preview_data->page_width,
preview_data->page_height);
g_object_unref(gc);
cr = gdk_cairo_create(preview_data->area->window);
gtk_print_context_set_cairo_context(preview_data->context, cr, PREVIEW_SCALE, PREVIEW_SCALE);
cairo_destroy(cr);
if (preview_data->current_page) {
preview_data->rendering = TRUE;
gtk_widget_set_sensitive(preview_data->close, FALSE);
int cur = GPOINTER_TO_INT(preview_data->current_page->data);
gchar *str;
str = g_strdup_printf(_("Page %d"), cur+1);
gtk_label_set_text(GTK_LABEL(preview_data->page_nr_label), str);
g_free(str);
gtk_print_operation_preview_render_page(preview_data->preview,
GPOINTER_TO_INT
(preview_data->current_page->data));
gtk_widget_set_sensitive(preview_data->first,
preview_data->current_page->prev != NULL);
gtk_widget_set_sensitive(preview_data->previous,
preview_data->current_page->prev != NULL);
gtk_widget_set_sensitive(preview_data->next,
preview_data->current_page->next != NULL);
gtk_widget_set_sensitive(preview_data->last,
preview_data->current_page->next != NULL);
gtk_widget_set_sensitive(preview_data->close, TRUE);
preview_data->rendering = FALSE;
}
return TRUE;
}
static void cb_preview_go_first(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData*) data;
preview_data->current_page = preview_data->pages_to_print;
gtk_widget_queue_draw(preview_data->area);
}
static void cb_preview_go_previous(GtkButton *button, gpointer data)
{
GList *next;
PreviewData *preview_data = (PreviewData*) data;
next = g_list_previous(preview_data->current_page);
if (next)
preview_data->current_page = next;
gtk_widget_queue_draw(preview_data->area);
}
static void cb_preview_go_next(GtkButton *button, gpointer data)
{
GList *next;
PreviewData *preview_data = (PreviewData*) data;
next = g_list_next(preview_data->current_page);
if (next)
preview_data->current_page = next;
gtk_widget_queue_draw(preview_data->area);
}
static void cb_preview_go_last(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData*) data;
preview_data->current_page = g_list_last(preview_data->current_page);
gtk_widget_queue_draw(preview_data->area);
}
static void cb_preview_btn_close(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData *)data;
if (preview_data->rendering)
return;
gtk_widget_destroy(preview_data->dialog);
}
static void cb_preview_zoom_100(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData*) data;
if (preview_data->print_data->zoom != 1.) {
preview_data->print_data->zoom = 1.;
gtk_widget_queue_draw(preview_data->area);
printing_preview_update_zoom_sensitivity(preview_data);
}
}
static void cb_preview_zoom_fit(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData*) data;
gdouble zoom_w;
gdouble zoom_h;
zoom_w = ((gdouble)preview_data->scrolled_window->allocation.width) /
((gdouble)preview_data->page_width/preview_data->print_data->zoom +
PREVIEW_SHADOW_OFFSET);
zoom_h = ((gdouble)preview_data->scrolled_window->allocation.height) /
((gdouble)preview_data->page_height/preview_data->print_data->zoom +
PREVIEW_SHADOW_OFFSET);
preview_data->print_data->zoom = MIN(zoom_w,zoom_h) - 0.01;
if (preview_data->print_data->zoom > PREVIEW_ZOOM_MAX)
preview_data->print_data->zoom = PREVIEW_ZOOM_MAX;
else if (preview_data->print_data->zoom < PREVIEW_ZOOM_MIN)
preview_data->print_data->zoom = PREVIEW_ZOOM_MIN;
printing_preview_update_zoom_sensitivity(preview_data);
gtk_widget_queue_draw(preview_data->area);
}
static void cb_preview_zoom_in(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData*) data;
gdouble new_zoom;
new_zoom = preview_data->print_data->zoom * PREVIEW_ZOOM_FAC;
if (new_zoom <= PREVIEW_ZOOM_MAX) {
preview_data->print_data->zoom = new_zoom;
printing_preview_update_zoom_sensitivity(preview_data);
gtk_widget_queue_draw(preview_data->area);
}
}
static void cb_preview_zoom_out(GtkButton *button, gpointer data)
{
PreviewData *preview_data = (PreviewData*) data;
gdouble new_zoom;
new_zoom = preview_data->print_data->zoom / PREVIEW_ZOOM_FAC;
if (new_zoom >= PREVIEW_ZOOM_MIN) {
preview_data->print_data->zoom = new_zoom;
printing_preview_update_zoom_sensitivity(preview_data);
gtk_widget_queue_draw(preview_data->area);
}
}
static void cb_preview_request_page_setup(GtkPrintOperation *op,
GtkPrintContext *context,
gint page_nr,
GtkPageSetup *setup,gpointer data)
{
GtkPaperSize *paper_size;
GtkPaperSize *old_size;
gdouble width;
gdouble height;
gdouble top_margin;
gdouble bottom_margin;
gdouble left_margin;
gdouble right_margin;
PreviewData *preview_data = (PreviewData*) data;
old_size = gtk_page_setup_get_paper_size(setup);
width = gtk_paper_size_get_width(old_size,GTK_UNIT_INCH);
height = gtk_paper_size_get_height(old_size,GTK_UNIT_INCH);
top_margin = gtk_page_setup_get_top_margin(setup,GTK_UNIT_INCH);
bottom_margin = gtk_page_setup_get_bottom_margin(setup,GTK_UNIT_INCH);
left_margin = gtk_page_setup_get_left_margin(setup,GTK_UNIT_INCH);
right_margin = gtk_page_setup_get_right_margin(setup,GTK_UNIT_INCH);
paper_size = gtk_paper_size_new_custom("preview paper", "preview_paper",
width*preview_data->print_data->zoom,
height*preview_data->print_data->zoom,
GTK_UNIT_INCH);
gtk_page_setup_set_paper_size(setup, paper_size);
gtk_paper_size_free(paper_size);
gtk_page_setup_set_top_margin(setup,top_margin*preview_data->print_data->zoom,
GTK_UNIT_INCH);
gtk_page_setup_set_bottom_margin(setup,bottom_margin*preview_data->print_data->zoom,
GTK_UNIT_INCH);
gtk_page_setup_set_left_margin(setup,left_margin*preview_data->print_data->zoom,
GTK_UNIT_INCH);
gtk_page_setup_set_right_margin(setup,right_margin*preview_data->print_data->zoom,
GTK_UNIT_INCH);
}
static void printing_textview_cb_begin_print(GtkPrintOperation *op, GtkPrintContext *context,
gpointer user_data)
{
double width, height;
int num_lines;
double page_height;
GList *page_breaks;
PrintData *print_data;
PangoFontDescription *desc;
int start, ii;
PangoLayoutIter *iter;
double start_pos;
gint header_end_pos;
gint num_header_lines;
gint dummy;
gboolean header_done;
gboolean has_headers = FALSE;
const gchar *text;
double line_height =0.;
print_data = (PrintData*) user_data;
debug_print("Preparing print job...\n");
width = gtk_print_context_get_width(context);
height = gtk_print_context_get_height(context);
if (print_data->layout == NULL)
print_data->layout = gtk_print_context_create_pango_layout(context);
if (prefs_common.use_different_print_font)
desc = pango_font_description_from_string(prefs_common.printfont);
else
desc = pango_font_description_copy(
pango_context_get_font_description(print_data->pango_context));
pango_layout_set_font_description(print_data->layout, desc);
pango_font_description_free(desc);
pango_layout_set_width(print_data->layout, width * PANGO_SCALE);
pango_layout_set_text(print_data->layout, (char *)print_data->to_print, -1);
printing_layout_set_text_attributes(print_data, context, &has_headers);
num_lines = pango_layout_get_line_count(print_data->layout);
page_breaks = NULL;
page_height = 0;
start = 0;
ii = 0;
start_pos = 0.;
iter = pango_layout_get_iter(print_data->layout);
/* find the last character of the header */
header_end_pos = 0;
header_done = FALSE;
text = pango_layout_get_text(print_data->layout);
if (has_headers) {
if (text && *text && *text != '\n') {
do {
if (text[0] == '\n' && (text[1] != '\0') && (text[1] == '\n'))
header_done = TRUE;
else
header_end_pos++;
text++;
} while(*text && !header_done);
}
/* find line number for header end */
pango_layout_index_to_line_x(print_data->layout, header_end_pos, 1,
&num_header_lines, &dummy);
/* line count is zero-based */
num_header_lines++;
} else {
print_data->ypos_line = -1.0;
}
do {
PangoRectangle logical_rect;
PangoLayoutLine *line;
PangoAttrShape *attr = NULL;
int baseline;
if (ii >= start) {
line = pango_layout_iter_get_line(iter);
pango_layout_iter_get_line_extents(iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline(iter);
if ((attr = g_hash_table_lookup(print_data->images,
GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) {
line_height = (double)gdk_pixbuf_get_height(GDK_PIXBUF(attr->data));
} else {
line_height = ((double)logical_rect.height) / PANGO_SCALE;
}
}
if ((page_height + line_height) > height) {
page_breaks = g_list_prepend(page_breaks, GINT_TO_POINTER(ii));
page_height = 0;
}
if (has_headers && ii == num_header_lines) {
int y0, y1;
pango_layout_iter_get_line_yrange(iter,&y0,&y1);
print_data->ypos_line = (double)y0 + 1./3.*((double)(y1 - y0))/2.;
}
page_height += line_height;
ii++;
} while(ii < num_lines && pango_layout_iter_next_line(iter));
pango_layout_iter_free(iter);
page_breaks = g_list_reverse(page_breaks);
print_data->npages = g_list_length(page_breaks) + 1;
print_data->page_breaks = page_breaks;
gtk_print_operation_set_n_pages(op, print_data->npages);
debug_print("Starting print job...\n");
}
static cairo_surface_t *pixbuf_to_surface(GdkPixbuf *pixbuf)
{
cairo_surface_t *surface;
cairo_format_t format;
static const cairo_user_data_key_t key;
guchar *pixels = g_malloc(
4*
gdk_pixbuf_get_width(pixbuf)*
gdk_pixbuf_get_height(pixbuf));
guchar *src_pixels = gdk_pixbuf_get_pixels (pixbuf);
gint width = gdk_pixbuf_get_width(pixbuf);
gint height = gdk_pixbuf_get_height(pixbuf);
gint nchans = gdk_pixbuf_get_n_channels (pixbuf);
gint stride = gdk_pixbuf_get_rowstride (pixbuf);
gint j;
if (nchans == 3)
format = CAIRO_FORMAT_RGB24;
else
format = CAIRO_FORMAT_ARGB32;
surface = cairo_image_surface_create_for_data (pixels,
format, width, height, 4*width);
cairo_surface_set_user_data (surface, &key,
pixels, (cairo_destroy_func_t)g_free);
for (j = height; j; j--) {
guchar *p = src_pixels;
guchar *q = pixels;
if (nchans == 3) {
guchar *end = p + 3 * width;
while (p < end) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
q[0] = p[2];
q[1] = p[1];
q[2] = p[0];
#else
q[1] = p[0];
q[2] = p[1];
q[3] = p[2];
#endif
p += 3;
q += 4;
}
} else {
guchar *end = p + 4 * width;
guint t1,t2,t3;
#define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END
while (p < end) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
MULT(q[0], p[2], p[3], t1);
MULT(q[1], p[1], p[3], t2);
MULT(q[2], p[0], p[3], t3);
q[3] = p[3];
#else
q[0] = p[3];
MULT(q[1], p[0], p[3], t1);
MULT(q[2], p[1], p[3], t2);
MULT(q[3], p[2], p[3], t3);
#endif
p += 4;
q += 4;
}
#undef MULT
}
src_pixels += stride;
pixels += 4 * width;
}
return surface;
}
static void printing_textview_cb_draw_page(GtkPrintOperation *op, GtkPrintContext *context,
int page_nr, gpointer user_data)
{
cairo_t *cr;
PrintData *print_data;
int start, end, ii;
GList *pagebreak;
PangoLayoutIter *iter;
double start_pos;
gboolean notlast = TRUE;
print_data = (PrintData*) user_data;
if (page_nr == 0) {
start = 0;
} else {
pagebreak = g_list_nth(print_data->page_breaks, page_nr - 1);
start = GPOINTER_TO_INT(pagebreak->data);
}
pagebreak = g_list_nth(print_data->page_breaks, page_nr);
if (pagebreak == NULL)
end = pango_layout_get_line_count(print_data->layout);
else
end = GPOINTER_TO_INT(pagebreak->data);
cr = gtk_print_context_get_cairo_context(context);
cairo_scale(cr, print_data->zoom, print_data->zoom);
cairo_set_source_rgb(cr, 0., 0., 0.);
ii = 0;
start_pos = 0.;
iter = pango_layout_get_iter(print_data->layout);
do {
PangoRectangle logical_rect;
PangoLayoutLine *line;
PangoAttrShape *attr = NULL;
int baseline;
if (ii >= start) {
line = pango_layout_iter_get_line(iter);
pango_layout_iter_get_line_extents(iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline(iter);
if (ii == start)
start_pos = ((double)logical_rect.y) / PANGO_SCALE;
/* Draw header separator line */
if (ii == 0 && print_data->ypos_line >= 0) {
cairo_surface_t *surface;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
gtk_print_context_get_width(context)/print_data->zoom,
gtk_print_context_get_height(context)/print_data->zoom);
cairo_set_line_width(cr, .5);
cairo_set_source_surface(cr, surface,
((double)logical_rect.x) / PANGO_SCALE,
((double)baseline) / PANGO_SCALE - start_pos);
cairo_move_to(cr, ((double)logical_rect.x) / PANGO_SCALE,
(double)print_data->ypos_line / PANGO_SCALE);
cairo_rel_line_to(cr, gtk_print_context_get_width(context)/print_data->zoom, 0);
cairo_set_source_rgb(cr, 0., 0., 0.);
cairo_stroke(cr);
cairo_surface_destroy(surface);
}
cairo_move_to(cr,
((double)logical_rect.x) / PANGO_SCALE,
((double)baseline) / PANGO_SCALE - start_pos);
if ((attr = g_hash_table_lookup(print_data->images,
GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) {
cairo_surface_t *surface;
surface = pixbuf_to_surface(GDK_PIXBUF(attr->data));
cairo_set_source_surface (cr, surface,
((double)logical_rect.x) / PANGO_SCALE,
((double)baseline) / PANGO_SCALE - start_pos);
cairo_paint (cr);
cairo_surface_destroy (surface);
} else {
pango_cairo_show_layout_line(cr, line);
}
}
ii++;
} while(ii < end && (notlast = pango_layout_iter_next_line(iter)));
pango_layout_iter_free(iter);
debug_print("Sent page %d to printer\n", page_nr+1);
}
static void printing_layout_set_text_attributes(PrintData *print_data,
GtkPrintContext *context,
gboolean *has_headers)
{
GtkTextIter iter;
PangoAttrList *attr_list;
PangoAttribute *attr;
GSList *open_attrs, *attr_walk;
GtkTextView *text_view = GTK_TEXT_VIEW(print_data->renderer_data);
GtkTextBuffer *buffer = gtk_text_view_get_buffer(text_view);
*has_headers = FALSE;
attr_list = pango_attr_list_new();
if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
gtk_text_buffer_get_start_iter(buffer, &iter);
} else {
gtk_text_buffer_get_iter_at_offset(buffer, &iter, print_data->sel_start);
}
open_attrs = NULL;
do {
gboolean fg_set, bg_set, under_set, strike_set, weight_set;
GSList *tags, *tag_walk;
GtkTextTag *tag;
GdkColor *color = NULL;
PangoUnderline underline;
gboolean strikethrough;
gint weight;
GdkPixbuf *image;
if (prefs_common.print_imgs && (image = gtk_text_iter_get_pixbuf(&iter)) != NULL) {
PangoRectangle rect = {0, 0, 0, 0};
gint startpos = printing_text_iter_get_offset_bytes(print_data, &iter);
gint h = gdk_pixbuf_get_height(image);
gint w = gdk_pixbuf_get_width(image);
gint a_h = gtk_print_context_get_height(context);
gint a_w = gtk_print_context_get_width(context);
gint r_h, r_w;
GdkPixbuf *scaled = NULL;
image_viewer_get_resized_size(w, h, a_w, a_h, &r_w, &r_h);
rect.x = 0;
rect.y = 0;
rect.width = r_w * PANGO_SCALE;
rect.height = r_h * PANGO_SCALE;
scaled = gdk_pixbuf_scale_simple(image, r_w, r_h, GDK_INTERP_BILINEAR);
attr = pango_attr_shape_new_with_data (&rect, &rect,
scaled, NULL, NULL);
attr->start_index = startpos;
attr->end_index = startpos+1;
pango_attr_list_insert(attr_list, attr);
g_hash_table_insert(print_data->images, GINT_TO_POINTER(startpos), attr);
print_data->img_cnt++;
}
if (gtk_text_iter_ends_tag(&iter, NULL)) {
PangoAttrColor *attr_color;
PangoAttrInt *attr_int;
tags = gtk_text_iter_get_toggled_tags(&iter, FALSE);
for (tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) {
gboolean found;
tag = GTK_TEXT_TAG(tag_walk->data);
g_object_get(G_OBJECT(tag),
"background-set", &bg_set,
"foreground-set", &fg_set,
"underline-set",&under_set,
"strikethrough-set", &strike_set,
"weight-set", &weight_set,
NULL);
if (fg_set) {
found = FALSE;
for (attr_walk = open_attrs; attr_walk != NULL;
attr_walk = attr_walk->next) {
attr = (PangoAttribute*)attr_walk->data;
if (attr->klass->type == PANGO_ATTR_FOREGROUND) {
attr_color = (PangoAttrColor*) attr;
g_object_get(G_OBJECT(tag), "foreground_gdk",
&color, NULL);
if (color &&
printing_is_pango_gdk_color_equal(&(attr_color->color),
color)) {
attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
pango_attr_list_insert(attr_list, attr);
found = TRUE;
open_attrs = g_slist_delete_link(open_attrs, attr_walk);
break;
}
if (color)
gdk_color_free(color);
}
}
if (!found)
debug_print("Error generating attribute list.\n");
}
if (bg_set) {
found = FALSE;
for (attr_walk = open_attrs; attr_walk != NULL;
attr_walk = attr_walk->next) {
attr = (PangoAttribute*)attr_walk->data;
if (attr->klass->type == PANGO_ATTR_BACKGROUND) {
attr_color = (PangoAttrColor*) attr;
g_object_get(G_OBJECT(tag), "background-gdk",
&color, NULL);
if (printing_is_pango_gdk_color_equal(&(attr_color->color),
color)) {
attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
pango_attr_list_insert(attr_list, attr);
found = TRUE;
open_attrs = g_slist_delete_link(open_attrs, attr_walk);
break;
}
if (color)
gdk_color_free(color);
}
}
if (!found)
debug_print("Error generating attribute list.\n");
}
if (under_set) {
found = FALSE;
for (attr_walk = open_attrs; attr_walk != NULL;
attr_walk = attr_walk->next) {
attr = (PangoAttribute*)attr_walk->data;
if (attr->klass->type == PANGO_ATTR_UNDERLINE) {
attr_int = (PangoAttrInt*)attr;
g_object_get(G_OBJECT(tag), "underline",
&underline, NULL);
if (attr_int->value == underline) {
attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
pango_attr_list_insert(attr_list, attr);
found = TRUE;
open_attrs = g_slist_delete_link(open_attrs, attr_walk);
break;
}
}
}
if (!found)
debug_print("Error generating attribute list.\n");
}
if (strike_set) {
found = FALSE;
for (attr_walk = open_attrs; attr_walk != NULL;
attr_walk = attr_walk->next) {
attr = (PangoAttribute*)attr_walk->data;
if (attr->klass->type == PANGO_ATTR_STRIKETHROUGH) {
attr_int = (PangoAttrInt*)attr;
g_object_get(G_OBJECT(tag), "strikethrough",
&strikethrough, NULL);
if (attr_int->value == strikethrough) {
attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
pango_attr_list_insert(attr_list, attr);
found = TRUE;
open_attrs = g_slist_delete_link(open_attrs, attr_walk);
break;
}
}
}
if (!found)
debug_print("Error generating attribute list.\n");
}
if (weight_set) {
found = FALSE;
for (attr_walk = open_attrs; attr_walk != NULL;
attr_walk = attr_walk->next) {
attr = (PangoAttribute*)attr_walk->data;
if (attr->klass->type == PANGO_ATTR_WEIGHT) {
attr_int = (PangoAttrInt*)attr;
g_object_get(G_OBJECT(tag), "weight", &weight, NULL);
if (attr_int->value == weight) {
attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
pango_attr_list_insert(attr_list, attr);
found = TRUE;
open_attrs = g_slist_delete_link(open_attrs, attr_walk);
break;
}
}
}
if (!found)
debug_print("Error generating attribute list.\n");
}
}
g_slist_free(tags);
}
if (gtk_text_iter_begins_tag(&iter, NULL)) {
tags = gtk_text_iter_get_toggled_tags(&iter, TRUE);
/* Sometimes, an iter has several weights. Use only the first in this case */
gboolean weight_set_for_this_iter;
weight_set_for_this_iter = FALSE;
for (tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) {
tag = GTK_TEXT_TAG(tag_walk->data);
g_object_get(G_OBJECT(tag),
"background-set", &bg_set,
"foreground-set", &fg_set,
"underline-set", &under_set,
"strikethrough-set", &strike_set,
"weight-set", &weight_set,
NULL);
if (fg_set) {
g_object_get(G_OBJECT(tag), "foreground-gdk", &color, NULL);
attr = pango_attr_foreground_new(color->red,color->green,color->blue);
attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
open_attrs = g_slist_prepend(open_attrs, attr);
}
if (bg_set) {
g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL);
attr = pango_attr_background_new(color->red,color->green,color->blue);
attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
open_attrs = g_slist_prepend(open_attrs, attr);
}
if (under_set) {
g_object_get(G_OBJECT(tag), "underline", &underline, NULL);
attr = pango_attr_underline_new(underline);
attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
open_attrs = g_slist_prepend(open_attrs, attr);
}
if (strike_set) {
g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL);
attr = pango_attr_strikethrough_new(strikethrough);
attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
open_attrs = g_slist_prepend(open_attrs, attr);
}
if (weight_set && !weight_set_for_this_iter) {
weight_set_for_this_iter = TRUE;
g_object_get(G_OBJECT(tag), "weight", &weight, NULL);
attr = pango_attr_weight_new(weight);
attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter);
open_attrs = g_slist_prepend(open_attrs, attr);
/* Hack to see if the first char is bold -- indicates header */
if (attr->start_index == 0 && weight == PANGO_WEIGHT_BOLD) {
*has_headers = TRUE;
}
}
}
g_slist_free(tags);
}
} while(!gtk_text_iter_is_end(&iter) && gtk_text_iter_forward_to_tag_toggle(&iter, NULL));
/* close all open attributes */
for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) {
attr = (PangoAttribute*) attr_walk->data;
attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter);
pango_attr_list_insert(attr_list, attr);
}
g_slist_free(open_attrs);
pango_layout_set_attributes(print_data->layout, attr_list);
pango_attr_list_unref(attr_list);
}
static gboolean printing_is_pango_gdk_color_equal(PangoColor *p, GdkColor *g)
{
return ((p->red == g->red) && (p->green == g->green) && (p->blue == g->blue));
}
/* Pango has it's attribute in bytes, but GtkTextIter gets only an offset
* in characters, so here we're returning an offset in bytes.
*/
static gint printing_text_iter_get_offset_bytes(PrintData *print_data, const GtkTextIter *iter)
{
gint off_chars;
gint off_bytes;
gchar *text;
GtkTextIter start;
off_chars = gtk_text_iter_get_offset(iter);
if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) {
gtk_text_buffer_get_start_iter(gtk_text_iter_get_buffer(iter), &start);
} else {
gtk_text_buffer_get_iter_at_offset(gtk_text_iter_get_buffer(iter), &start, print_data->sel_start);
}
text = gtk_text_iter_get_text(&start, iter);
off_bytes = strlen(text);
g_free(text);
return off_bytes;
}
static void printing_preview_update_zoom_sensitivity(PreviewData *preview_data)
{
if((preview_data->print_data->zoom * PREVIEW_ZOOM_FAC) > PREVIEW_ZOOM_MAX)
gtk_widget_set_sensitive(preview_data->zoom_in, FALSE);
else
gtk_widget_set_sensitive(preview_data->zoom_in, TRUE);
if ((preview_data->print_data->zoom / PREVIEW_ZOOM_FAC) < PREVIEW_ZOOM_MIN)
gtk_widget_set_sensitive(preview_data->zoom_out, FALSE);
else
gtk_widget_set_sensitive(preview_data->zoom_out, TRUE);
}
#endif /* GTK+ >= 2.10.0 */
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