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xed/gedit/gedit-print-preview.c

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/*
* gedit-print-preview.c
*
* Copyright (C) 2008 Paolo Borelli
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the gedit Team, 1998-2006. See the AUTHORS file for a
* list of people on the gedit Team.
* See the ChangeLog files for a list of changes.
*
* $Id: gedit-commands-search.c 5931 2007-09-25 20:05:40Z pborelli $
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <math.h>
#include <stdlib.h>
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <cairo-pdf.h>
#include "gedit-print-preview.h"
#define PRINTER_DPI (72.)
struct _GeditPrintPreviewPrivate
{
GtkPrintOperation *operation;
GtkPrintContext *context;
GtkPrintOperationPreview *gtk_preview;
GtkWidget *layout;
GtkWidget *scrolled_window;
GtkToolItem *next;
GtkToolItem *prev;
GtkWidget *page_entry;
GtkWidget *last;
GtkToolItem *multi;
GtkToolItem *zoom_one;
GtkToolItem *zoom_fit;
GtkToolItem *zoom_in;
GtkToolItem *zoom_out;
/* real size of the page in inches */
double paper_w;
double paper_h;
double dpi;
double scale;
/* size of the tile of a page (including padding
* and drop shadow) in pixels */
gint tile_w;
gint tile_h;
GtkPageOrientation orientation;
/* multipage support */
gint rows;
gint cols;
guint n_pages;
guint cur_page;
};
G_DEFINE_TYPE (GeditPrintPreview, gedit_print_preview, GTK_TYPE_VBOX)
static void
gedit_print_preview_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
//GeditPrintPreview *preview = GEDIT_PRINT_PREVIEW (object);
switch (prop_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gedit_print_preview_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
//GeditPrintPreview *preview = GEDIT_PRINT_PREVIEW (object);
switch (prop_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gedit_print_preview_finalize (GObject *object)
{
//GeditPrintPreview *preview = GEDIT_PRINT_PREVIEW (object);
G_OBJECT_CLASS (gedit_print_preview_parent_class)->finalize (object);
}
static void
gedit_print_preview_grab_focus (GtkWidget *widget)
{
GeditPrintPreview *preview;
preview = GEDIT_PRINT_PREVIEW (widget);
gtk_widget_grab_focus (GTK_WIDGET (preview->priv->layout));
}
static void
gedit_print_preview_class_init (GeditPrintPreviewClass *klass)
{
GObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = G_OBJECT_CLASS (klass);
widget_class = GTK_WIDGET_CLASS (klass);
object_class->get_property = gedit_print_preview_get_property;
object_class->set_property = gedit_print_preview_set_property;
object_class->finalize = gedit_print_preview_finalize;
widget_class->grab_focus = gedit_print_preview_grab_focus;
g_type_class_add_private (object_class, sizeof(GeditPrintPreviewPrivate));
}
static void
update_layout_size (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
priv = preview->priv;
/* force size of the drawing area to make the scrolled window work */
gtk_layout_set_size (GTK_LAYOUT (priv->layout),
priv->tile_w * priv->cols,
priv->tile_h * priv->rows);
gtk_widget_queue_draw (preview->priv->layout);
}
static void
set_rows_and_cols (GeditPrintPreview *preview,
gint rows,
gint cols)
{
/* TODO: set the zoom appropriately */
preview->priv->rows = rows;
preview->priv->cols = cols;
update_layout_size (preview);
}
/* get the paper size in points: these must be used only
* after the widget has been mapped and the dpi is known */
static double
get_paper_width (GeditPrintPreview *preview)
{
return preview->priv->paper_w * preview->priv->dpi;
}
static double
get_paper_height (GeditPrintPreview *preview)
{
return preview->priv->paper_h * preview->priv->dpi;
}
#define PAGE_PAD 12
#define PAGE_SHADOW_OFFSET 5
/* The tile size is the size of the area where a page
* will be drawn including the padding and idependent
* of the orientation */
/* updates the tile size to the current zoom and page size */
static void
update_tile_size (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
gint w, h;
priv = preview->priv;
w = 2 * PAGE_PAD + floor (priv->scale * get_paper_width (preview) + 0.5);
h = 2 * PAGE_PAD + floor (priv->scale * get_paper_height (preview) + 0.5);
if ((priv->orientation == GTK_PAGE_ORIENTATION_LANDSCAPE) ||
(priv->orientation == GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE))
{
priv->tile_w = h;
priv->tile_h = w;
}
else
{
priv->tile_w = w;
priv->tile_h = h;
}
}
/* Zoom should always be set with one of these two function
* so that the tile size is properly updated */
static void
set_zoom_factor (GeditPrintPreview *preview,
double zoom)
{
GeditPrintPreviewPrivate *priv;
priv = preview->priv;
priv->scale = zoom;
update_tile_size (preview);
update_layout_size (preview);
}
static void
set_zoom_fit_to_size (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
double width, height;
double p_width, p_height;
double zoomx, zoomy;
priv = preview->priv;
g_object_get (gtk_layout_get_hadjustment (GTK_LAYOUT (priv->layout)),
"page-size", &width,
NULL);
g_object_get (gtk_layout_get_vadjustment (GTK_LAYOUT (priv->layout)),
"page-size", &height,
NULL);
width /= priv->cols;
height /= priv->rows;
if ((priv->orientation == GTK_PAGE_ORIENTATION_LANDSCAPE) ||
(priv->orientation == GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE))
{
p_width = get_paper_height (preview);
p_height = get_paper_width (preview);
}
else
{
p_width = get_paper_width (preview);
p_height = get_paper_height (preview);
}
zoomx = MAX (1, width - 2 * PAGE_PAD) / p_width;
zoomy = MAX (1, height - 2 * PAGE_PAD) / p_height;
if (zoomx <= zoomy)
{
priv->tile_w = width;
priv->tile_h = floor (0.5 + width * (p_height / p_width));
priv->scale = zoomx;
}
else
{
priv->tile_w = floor (0.5 + height * (p_width / p_height));
priv->tile_h = height;
priv->scale = zoomy;
}
update_layout_size (preview);
}
#define ZOOM_IN_FACTOR (1.2)
#define ZOOM_OUT_FACTOR (1.0 / ZOOM_IN_FACTOR)
static void
zoom_in (GeditPrintPreview *preview)
{
set_zoom_factor (preview,
preview->priv->scale * ZOOM_IN_FACTOR);
}
static void
zoom_out (GeditPrintPreview *preview)
{
set_zoom_factor (preview,
preview->priv->scale * ZOOM_OUT_FACTOR);
}
static void
goto_page (GeditPrintPreview *preview, gint page)
{
gchar c[32];
g_snprintf (c, 32, "%d", page + 1);
gtk_entry_set_text (GTK_ENTRY (preview->priv->page_entry), c);
gtk_widget_set_sensitive (GTK_WIDGET (preview->priv->prev),
(page > 0) && (preview->priv->n_pages > 1));
gtk_widget_set_sensitive (GTK_WIDGET (preview->priv->next),
(page != (preview->priv->n_pages - 1)) &&
(preview->priv->n_pages > 1));
if (page != preview->priv->cur_page)
{
preview->priv->cur_page = page;
if (preview->priv->n_pages > 0)
gtk_widget_queue_draw (preview->priv->layout);
}
}
static void
prev_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
GdkEvent *event;
gint page;
event = gtk_get_current_event ();
if (event->button.state & GDK_SHIFT_MASK)
page = 0;
else
page = preview->priv->cur_page - preview->priv->rows * preview->priv->cols;
goto_page (preview, MAX (page, 0));
gdk_event_free (event);
}
static void
next_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
GdkEvent *event;
gint page;
event = gtk_get_current_event ();
if (event->button.state & GDK_SHIFT_MASK)
page = preview->priv->n_pages - 1;
else
page = preview->priv->cur_page + preview->priv->rows * preview->priv->cols;
goto_page (preview, MIN (page, preview->priv->n_pages - 1));
gdk_event_free (event);
}
static void
page_entry_activated (GtkEntry *entry,
GeditPrintPreview *preview)
{
const gchar *text;
gint page;
text = gtk_entry_get_text (entry);
page = CLAMP (atoi (text), 1, preview->priv->n_pages) - 1;
goto_page (preview, page);
gtk_widget_grab_focus (GTK_WIDGET (preview->priv->layout));
}
static void
page_entry_insert_text (GtkEditable *editable,
const gchar *text,
gint length,
gint *position)
{
gunichar c;
const gchar *p;
const gchar *end;
p = text;
end = text + length;
while (p != end)
{
const gchar *next;
next = g_utf8_next_char (p);
c = g_utf8_get_char (p);
if (!g_unichar_isdigit (c))
{
g_signal_stop_emission_by_name (editable, "insert-text");
break;
}
p = next;
}
}
static gboolean
page_entry_focus_out (GtkWidget *widget,
GdkEventFocus *event,
GeditPrintPreview *preview)
{
const gchar *text;
gint page;
text = gtk_entry_get_text (GTK_ENTRY (widget));
page = atoi (text) - 1;
/* Reset the page number only if really needed */
if (page != preview->priv->cur_page)
{
gchar *str;
str = g_strdup_printf ("%d", preview->priv->cur_page + 1);
gtk_entry_set_text (GTK_ENTRY (widget), str);
g_free (str);
}
return FALSE;
}
static void
on_1x1_clicked (GtkMenuItem *i, GeditPrintPreview *preview)
{
set_rows_and_cols (preview, 1, 1);
}
static void
on_1x2_clicked (GtkMenuItem *i, GeditPrintPreview *preview)
{
set_rows_and_cols (preview, 1, 2);
}
static void
on_2x1_clicked (GtkMenuItem *i, GeditPrintPreview *preview)
{
set_rows_and_cols (preview, 2, 1);
}
static void
on_2x2_clicked (GtkMenuItem *i, GeditPrintPreview *preview)
{
set_rows_and_cols (preview, 2, 2);
}
static void
multi_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
GtkWidget *m, *i;
m = gtk_menu_new ();
gtk_widget_show (m);
g_signal_connect (m,
"selection_done",
G_CALLBACK (gtk_widget_destroy),
m);
i = gtk_menu_item_new_with_label ("1x1");
gtk_widget_show (i);
gtk_menu_attach (GTK_MENU (m), i, 0, 1, 0, 1);
g_signal_connect (i, "activate", G_CALLBACK (on_1x1_clicked), preview);
i = gtk_menu_item_new_with_label ("2x1");
gtk_widget_show (i);
gtk_menu_attach (GTK_MENU (m), i, 0, 1, 1, 2);
g_signal_connect (i, "activate", G_CALLBACK (on_2x1_clicked), preview);
i = gtk_menu_item_new_with_label ("1x2");
gtk_widget_show (i);
gtk_menu_attach (GTK_MENU (m), i, 1, 2, 0, 1);
g_signal_connect (i, "activate", G_CALLBACK (on_1x2_clicked), preview);
i = gtk_menu_item_new_with_label ("2x2");
gtk_widget_show (i);
gtk_menu_attach (GTK_MENU (m), i, 1, 2, 1, 2);
g_signal_connect (i, "activate", G_CALLBACK (on_2x2_clicked), preview);
gtk_menu_popup (GTK_MENU (m),
NULL, NULL, NULL, preview, 0,
GDK_CURRENT_TIME);
}
static void
zoom_one_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
set_zoom_factor (preview, 1);
}
static void
zoom_fit_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
set_zoom_fit_to_size (preview);
}
static void
zoom_in_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
zoom_in (preview);
}
static void
zoom_out_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
zoom_out (preview);
}
static void
close_button_clicked (GtkWidget *button,
GeditPrintPreview *preview)
{
gtk_widget_destroy (GTK_WIDGET (preview));
}
static void
create_bar (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
GtkWidget *toolbar;
GtkToolItem *i;
AtkObject *atko;
GtkWidget *status;
priv = preview->priv;
toolbar = gtk_toolbar_new ();
gtk_toolbar_set_style (GTK_TOOLBAR (toolbar),
GTK_TOOLBAR_BOTH_HORIZ);
gtk_widget_show (toolbar);
gtk_box_pack_start (GTK_BOX (preview),
toolbar,
FALSE, FALSE, 0);
priv->prev = gtk_tool_button_new_from_stock (GTK_STOCK_GO_BACK);
gtk_tool_button_set_label (GTK_TOOL_BUTTON (priv->prev),
"P_revious Page");
gtk_tool_button_set_use_underline (GTK_TOOL_BUTTON (priv->prev), TRUE);
gtk_tool_item_set_tooltip_text (priv->prev, _("Show the previous page"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->prev, -1);
g_signal_connect (priv->prev,
"clicked",
G_CALLBACK (prev_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->prev));
priv->next = gtk_tool_button_new_from_stock (GTK_STOCK_GO_FORWARD);
gtk_tool_button_set_label (GTK_TOOL_BUTTON (priv->next),
"_Next Page");
gtk_tool_button_set_use_underline (GTK_TOOL_BUTTON (priv->next), TRUE);
gtk_tool_item_set_tooltip_text (priv->next, _("Show the next page"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->next, -1);
g_signal_connect (priv->next,
"clicked",
G_CALLBACK (next_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->next));
i = gtk_separator_tool_item_new ();
gtk_widget_show (GTK_WIDGET (i));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), i, -1);
status = gtk_hbox_new (FALSE, 4);
priv->page_entry = gtk_entry_new ();
gtk_entry_set_width_chars (GTK_ENTRY (priv->page_entry), 3);
gtk_entry_set_max_length (GTK_ENTRY (priv->page_entry), 6);
gtk_widget_set_tooltip_text (priv->page_entry, _("Current page (Alt+P)"));
g_signal_connect (priv->page_entry,
"activate",
G_CALLBACK (page_entry_activated),
preview);
g_signal_connect (priv->page_entry,
"insert-text",
G_CALLBACK (page_entry_insert_text),
NULL);
g_signal_connect (priv->page_entry,
"focus-out-event",
G_CALLBACK (page_entry_focus_out),
preview);
gtk_box_pack_start (GTK_BOX (status),
priv->page_entry,
FALSE, FALSE, 0);
/* gtk_label_set_mnemonic_widget ((GtkLabel *) l, mp->priv->page_entry); */
/* We are displaying 'XXX of XXX'. */
gtk_box_pack_start (GTK_BOX (status),
/* Translators: the "of" from "1 of 19" in print preview. */
gtk_label_new (_("of")),
FALSE, FALSE, 0);
priv->last = gtk_label_new ("");
gtk_box_pack_start (GTK_BOX (status),
priv->last,
FALSE, FALSE, 0);
atko = gtk_widget_get_accessible (priv->last);
atk_object_set_name (atko, _("Page total"));
atk_object_set_description (atko, _("The total number of pages in the document"));
gtk_widget_show_all (status);
i = gtk_tool_item_new ();
gtk_container_add (GTK_CONTAINER (i), status);
gtk_widget_show (GTK_WIDGET (i));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), i, -1);
i = gtk_separator_tool_item_new ();
gtk_widget_show (GTK_WIDGET (i));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), i, -1);
priv->multi = gtk_tool_button_new_from_stock (GTK_STOCK_DND_MULTIPLE);
gtk_tool_button_set_label (GTK_TOOL_BUTTON (priv->multi),
"_Show Multiple Pages");
gtk_tool_button_set_use_underline (GTK_TOOL_BUTTON (priv->multi), TRUE);
gtk_tool_item_set_tooltip_text (priv->multi, _("Show multiple pages"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->multi, -1);
g_signal_connect (priv->multi,
"clicked",
G_CALLBACK (multi_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->multi));
i = gtk_separator_tool_item_new ();
gtk_widget_show (GTK_WIDGET (i));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), i, -1);
priv->zoom_one = gtk_tool_button_new_from_stock (GTK_STOCK_ZOOM_100);
gtk_tool_item_set_tooltip_text (priv->zoom_one, _("Zoom 1:1"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->zoom_one, -1);
g_signal_connect (priv->zoom_one,
"clicked",
G_CALLBACK (zoom_one_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->zoom_one));
priv->zoom_fit = gtk_tool_button_new_from_stock (GTK_STOCK_ZOOM_FIT);
gtk_tool_item_set_tooltip_text (priv->zoom_fit, _("Zoom to fit the whole page"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->zoom_fit, -1);
g_signal_connect (priv->zoom_fit,
"clicked",
G_CALLBACK (zoom_fit_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->zoom_fit));
priv->zoom_in = gtk_tool_button_new_from_stock (GTK_STOCK_ZOOM_IN);
gtk_tool_item_set_tooltip_text (priv->zoom_in, _("Zoom the page in"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->zoom_in, -1);
g_signal_connect (priv->zoom_in,
"clicked",
G_CALLBACK (zoom_in_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->zoom_in));
priv->zoom_out = gtk_tool_button_new_from_stock (GTK_STOCK_ZOOM_OUT);
gtk_tool_item_set_tooltip_text (priv->zoom_out, _("Zoom the page out"));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->zoom_out, -1);
g_signal_connect (priv->zoom_out,
"clicked",
G_CALLBACK (zoom_out_button_clicked),
preview);
gtk_widget_show (GTK_WIDGET (priv->zoom_out));
i = gtk_separator_tool_item_new ();
gtk_widget_show (GTK_WIDGET (i));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), i, -1);
i = gtk_tool_button_new (NULL, _("_Close Preview"));
gtk_tool_button_set_use_underline (GTK_TOOL_BUTTON (i), TRUE);
gtk_tool_item_set_is_important (i, TRUE);
gtk_tool_item_set_tooltip_text (i, _("Close print preview"));
g_signal_connect (i, "clicked",
G_CALLBACK (close_button_clicked), preview);
gtk_widget_show (GTK_WIDGET (i));
gtk_toolbar_insert (GTK_TOOLBAR (toolbar), i, -1);
}
static gint
get_first_page_displayed (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
priv = preview->priv;
return priv->cur_page - priv->cur_page % (priv->cols * priv->rows);
}
/* returns the page number (starting from 0) or -1 if no page */
static gint
get_page_at_coords (GeditPrintPreview *preview,
gint x,
gint y)
{
GeditPrintPreviewPrivate *priv;
GtkAdjustment *hadj, *vadj;
gint r, c, pg;
priv = preview->priv;
if (priv->tile_h <= 0 || priv->tile_h <= 0)
return -1;
hadj = gtk_layout_get_hadjustment (GTK_LAYOUT (priv->layout));
vadj = gtk_layout_get_vadjustment (GTK_LAYOUT (priv->layout));
x += gtk_adjustment_get_value (hadj);
y += gtk_adjustment_get_value (vadj);
r = 1 + y / (priv->tile_h);
c = 1 + x / (priv->tile_w);
if (c > priv->cols)
return -1;
pg = get_first_page_displayed (preview) - 1;
pg += (r - 1) * priv->cols + c;
if (pg >= priv->n_pages)
return -1;
/* FIXME: we could try to be picky and check
* if we actually are inside the page */
return pg;
}
static gboolean
preview_layout_query_tooltip (GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_tip,
GtkTooltip *tooltip,
GeditPrintPreview *preview)
{
gint pg;
gchar *tip;
pg = get_page_at_coords (preview, x, y);
if (pg < 0)
return FALSE;
tip = g_strdup_printf (_("Page %d of %d"), pg + 1, preview->priv->n_pages);
gtk_tooltip_set_text (tooltip, tip);
g_free (tip);
return TRUE;
}
static gint
preview_layout_key_press (GtkWidget *widget,
GdkEventKey *event,
GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
GtkAdjustment *hadj, *vadj;
double x, y;
guint h, w;
double hlower, hupper, vlower, vupper;
double hpage, vpage;
double hstep, vstep;
gboolean domove = FALSE;
gboolean ret = TRUE;
priv = preview->priv;
hadj = gtk_layout_get_hadjustment (GTK_LAYOUT (priv->layout));
vadj = gtk_layout_get_vadjustment (GTK_LAYOUT (priv->layout));
x = gtk_adjustment_get_value (hadj);
y = gtk_adjustment_get_value (vadj);
g_object_get (hadj,
"lower", &hlower,
"upper", &hupper,
"page-size", &hpage,
NULL);
g_object_get (vadj,
"lower", &vlower,
"upper", &vupper,
"page-size", &vpage,
NULL);
gtk_layout_get_size (GTK_LAYOUT (priv->layout), &w, &h);
hstep = 10;
vstep = 10;
switch (event->keyval) {
case '1':
set_zoom_fit_to_size (preview);
break;
case '+':
case '=':
case GDK_KP_Add:
zoom_in (preview);
break;
case '-':
case '_':
case GDK_KP_Subtract:
zoom_out (preview);
break;
case GDK_KP_Right:
case GDK_Right:
if (event->state & GDK_SHIFT_MASK)
x = hupper - hpage;
else
x = MIN (hupper - hpage, x + hstep);
domove = TRUE;
break;
case GDK_KP_Left:
case GDK_Left:
if (event->state & GDK_SHIFT_MASK)
x = hlower;
else
x = MAX (hlower, x - hstep);
domove = TRUE;
break;
case GDK_KP_Up:
case GDK_Up:
if (event->state & GDK_SHIFT_MASK)
goto page_up;
y = MAX (vlower, y - vstep);
domove = TRUE;
break;
case GDK_KP_Down:
case GDK_Down:
if (event->state & GDK_SHIFT_MASK)
goto page_down;
y = MIN (vupper - vpage, y + vstep);
domove = TRUE;
break;
case GDK_KP_Page_Up:
case GDK_Page_Up:
case GDK_Delete:
case GDK_KP_Delete:
case GDK_BackSpace:
page_up:
if (y <= vlower)
{
if (preview->priv->cur_page > 0)
{
goto_page (preview, preview->priv->cur_page - 1);
y = (vupper - vpage);
}
}
else
{
y = vlower;
}
domove = TRUE;
break;
case GDK_KP_Page_Down:
case GDK_Page_Down:
case ' ':
page_down:
if (y >= (vupper - vpage))
{
if (preview->priv->cur_page < preview->priv->n_pages - 1)
{
goto_page (preview, preview->priv->cur_page + 1);
y = vlower;
}
}
else
{
y = (vupper - vpage);
}
domove = TRUE;
break;
case GDK_KP_Home:
case GDK_Home:
goto_page (preview, 0);
y = 0;
domove = TRUE;
break;
case GDK_KP_End:
case GDK_End:
goto_page (preview, preview->priv->n_pages - 1);
y = 0;
domove = TRUE;
break;
case GDK_Escape:
gtk_widget_destroy (GTK_WIDGET (preview));
break;
case 'c':
if (event->state & GDK_MOD1_MASK)
{
gtk_widget_destroy (GTK_WIDGET (preview));
}
break;
case 'p':
if (event->state & GDK_MOD1_MASK)
{
gtk_widget_grab_focus (preview->priv->page_entry);
}
break;
default:
/* by default do not stop the default handler */
ret = FALSE;
}
if (domove)
{
gtk_adjustment_set_value (hadj, x);
gtk_adjustment_set_value (vadj, y);
gtk_adjustment_value_changed (hadj);
gtk_adjustment_value_changed (vadj);
}
return ret;
}
static void
create_preview_layout (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
AtkObject *atko;
priv = preview->priv;
priv->layout = gtk_layout_new (NULL, NULL);
// gtk_widget_set_double_buffered (priv->layout, FALSE);
atko = gtk_widget_get_accessible (GTK_WIDGET (priv->layout));
atk_object_set_name (atko, _("Page Preview"));
atk_object_set_description (atko, _("The preview of a page in the document to be printed"));
gtk_widget_add_events (priv->layout,
GDK_POINTER_MOTION_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_KEY_PRESS_MASK);
GTK_WIDGET_SET_FLAGS (priv->layout, GTK_CAN_FOCUS);
g_signal_connect (priv->layout,
"key-press-event",
G_CALLBACK (preview_layout_key_press),
preview);
g_object_set (priv->layout, "has-tooltip", TRUE, NULL);
g_signal_connect (priv->layout,
"query-tooltip",
G_CALLBACK (preview_layout_query_tooltip),
preview);
priv->scrolled_window = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->scrolled_window),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_container_add (GTK_CONTAINER (priv->scrolled_window), priv->layout);
gtk_box_pack_end (GTK_BOX (preview),
priv->scrolled_window,
TRUE, TRUE, 0);
gtk_widget_show_all (GTK_WIDGET (priv->scrolled_window));
gtk_widget_grab_focus (GTK_WIDGET (priv->layout));
}
static void
gedit_print_preview_init (GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
priv = G_TYPE_INSTANCE_GET_PRIVATE (preview,
GEDIT_TYPE_PRINT_PREVIEW,
GeditPrintPreviewPrivate);
preview->priv = priv;
priv->operation = NULL;
priv->context = NULL;
priv->gtk_preview = NULL;
create_bar (preview);
create_preview_layout (preview);
// FIXME
priv->cur_page = 0;
priv->paper_w = 0;
priv->paper_h = 0;
priv->dpi = PRINTER_DPI;
priv->scale = 1.0;
priv->rows = 1;
priv->cols = 1;
}
static void
draw_page_content (cairo_t *cr,
gint page_number,
GeditPrintPreview *preview)
{
/* scale to the desired size */
cairo_scale (cr, preview->priv->scale, preview->priv->scale);
/* rotate acording to page orientation if needed */
if ((preview->priv->orientation == GTK_PAGE_ORIENTATION_LANDSCAPE) ||
(preview->priv->orientation == GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE))
{
cairo_matrix_t matrix;
cairo_matrix_init (&matrix,
0, -1,
1, 0,
0, get_paper_width (preview));
cairo_transform (cr, &matrix);
}
gtk_print_context_set_cairo_context (preview->priv->context,
cr,
preview->priv->dpi,
preview->priv->dpi);
gtk_print_operation_preview_render_page (preview->priv->gtk_preview,
page_number);
}
/* For the frame, we scale and rotate manually, since
* the line width should not depend on the zoom and
* the drop shadow should be on the bottom right no matter
* the orientation */
static void
draw_page_frame (cairo_t *cr,
GeditPrintPreview *preview)
{
double w, h;
w = get_paper_width (preview);
h = get_paper_height (preview);
if ((preview->priv->orientation == GTK_PAGE_ORIENTATION_LANDSCAPE) ||
(preview->priv->orientation == GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE))
{
double tmp;
tmp = w;
w = h;
h = tmp;
}
w *= preview->priv->scale;
h *= preview->priv->scale;
/* drop shadow */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_rectangle (cr,
PAGE_SHADOW_OFFSET, PAGE_SHADOW_OFFSET,
w, h);
cairo_fill (cr);
/* page frame */
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_rectangle (cr,
0, 0,
w, h);
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1);
cairo_stroke (cr);
}
static void
draw_page (cairo_t *cr,
double x,
double y,
gint page_number,
GeditPrintPreview *preview)
{
cairo_save (cr);
/* move to the page top left corner */
cairo_translate (cr, x + PAGE_PAD, y + PAGE_PAD);
draw_page_frame (cr, preview);
draw_page_content (cr, page_number, preview);
cairo_restore (cr);
}
static gboolean
preview_expose (GtkWidget *widget,
GdkEventExpose *event,
GeditPrintPreview *preview)
{
GeditPrintPreviewPrivate *priv;
GdkWindow *bin_window;
cairo_t *cr;
gint pg;
gint i, j;
priv = preview->priv;
bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (priv->layout));
if (event->window != bin_window)
return FALSE;
cr = gdk_cairo_create (bin_window);
gdk_cairo_rectangle (cr, &event->area);
cairo_clip (cr);
/* get the first page to display */
pg = get_first_page_displayed (preview);
for (i = 0; i < priv->cols; ++i)
{
for (j = 0; j < priv->rows; ++j)
{
if (!gtk_print_operation_preview_is_selected (priv->gtk_preview,
pg))
{
continue;
}
if (pg == priv->n_pages)
break;
draw_page (cr,
j * priv->tile_w,
i * priv->tile_h,
pg,
preview);
++pg;
}
}
cairo_destroy (cr);
return TRUE;
}
static double
get_screen_dpi (GeditPrintPreview *preview)
{
GdkScreen *screen;
double dpi;
screen = gtk_widget_get_screen (GTK_WIDGET (preview));
dpi = gdk_screen_get_resolution (screen);
if (dpi < 30. || 600. < dpi)
{
g_warning ("Invalid the x-resolution for the screen, assuming 96dpi");
dpi = 96.;
}
return dpi;
}
static void
set_n_pages (GeditPrintPreview *preview,
gint n_pages)
{
gchar *str;
preview->priv->n_pages = n_pages;
// FIXME: count the visible pages
str = g_strdup_printf ("%d", n_pages);
gtk_label_set_markup (GTK_LABEL (preview->priv->last), str);
g_free (str);
}
static void
preview_ready (GtkPrintOperationPreview *gtk_preview,
GtkPrintContext *context,
GeditPrintPreview *preview)
{
gint n_pages;
g_object_get (preview->priv->operation, "n-pages", &n_pages, NULL);
set_n_pages (preview, n_pages);
goto_page (preview, 0);
/* figure out the dpi */
preview->priv->dpi = get_screen_dpi (preview);
set_zoom_factor (preview, 1.0);
/* let the default gtklayout handler clear the background */
g_signal_connect_after (preview->priv->layout,
"expose-event",
G_CALLBACK (preview_expose),
preview);
gtk_widget_queue_draw (preview->priv->layout);
}
static void
update_paper_size (GeditPrintPreview *preview,
GtkPageSetup *page_setup)
{
GtkPaperSize *paper_size;
paper_size = gtk_page_setup_get_paper_size (page_setup);
preview->priv->paper_w = gtk_paper_size_get_width (paper_size, GTK_UNIT_INCH);
preview->priv->paper_h = gtk_paper_size_get_height (paper_size, GTK_UNIT_INCH);
preview->priv->orientation = gtk_page_setup_get_orientation (page_setup);
}
static void
preview_got_page_size (GtkPrintOperationPreview *gtk_preview,
GtkPrintContext *context,
GtkPageSetup *page_setup,
GeditPrintPreview *preview)
{
update_paper_size (preview, page_setup);
}
/* HACK: we need a dummy surface to paginate... can we use something simpler? */
static cairo_status_t
dummy_write_func (G_GNUC_UNUSED gpointer closure,
G_GNUC_UNUSED const guchar *data,
G_GNUC_UNUSED guint length)
{
return CAIRO_STATUS_SUCCESS;
}
#define PRINTER_DPI (72.)
static cairo_surface_t *
create_preview_surface_platform (GtkPaperSize *paper_size,
double *dpi_x,
double *dpi_y)
{
double width, height;
cairo_surface_t *sf;
width = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
height = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
*dpi_x = *dpi_y = PRINTER_DPI;
sf = cairo_pdf_surface_create_for_stream (dummy_write_func, NULL,
width, height);
return sf;
}
static cairo_surface_t *
create_preview_surface (GeditPrintPreview *preview,
double *dpi_x,
double *dpi_y)
{
GtkPageSetup *page_setup;
GtkPaperSize *paper_size;
page_setup = gtk_print_context_get_page_setup (preview->priv->context);
/* gtk_page_setup_get_paper_size swaps width and height for landscape */
paper_size = gtk_page_setup_get_paper_size (page_setup);
return create_preview_surface_platform (paper_size, dpi_x, dpi_y);
}
GtkWidget *
gedit_print_preview_new (GtkPrintOperation *op,
GtkPrintOperationPreview *gtk_preview,
GtkPrintContext *context)
{
GeditPrintPreview *preview;
GtkPageSetup *page_setup;
cairo_surface_t *surface;
cairo_t *cr;
double dpi_x, dpi_y;
g_return_val_if_fail (GTK_IS_PRINT_OPERATION (op), NULL);
g_return_val_if_fail (GTK_IS_PRINT_OPERATION_PREVIEW (gtk_preview), NULL);
preview = g_object_new (GEDIT_TYPE_PRINT_PREVIEW, NULL);
preview->priv->operation = g_object_ref (op);
preview->priv->gtk_preview = g_object_ref (gtk_preview);
preview->priv->context = g_object_ref (context);
/* FIXME: is this legal?? */
gtk_print_operation_set_unit (op, GTK_UNIT_POINTS);
g_signal_connect (gtk_preview, "ready",
G_CALLBACK (preview_ready), preview);
g_signal_connect (gtk_preview, "got-page-size",
G_CALLBACK (preview_got_page_size), preview);
page_setup = gtk_print_context_get_page_setup (preview->priv->context);
update_paper_size (preview, page_setup);
/* FIXME: we need a cr to paginate... but we can't get the drawing
* area surface because it's not there yet... for now I create
* a dummy pdf surface */
surface = create_preview_surface (preview, &dpi_x, &dpi_y);
cr = cairo_create (surface);
gtk_print_context_set_cairo_context (context, cr, dpi_x, dpi_y);
cairo_destroy (cr);
cairo_surface_destroy (surface);
return GTK_WIDGET (preview);
}
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