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Current File : //proc/thread-self/root/usr/share/emscripten/tests/poppler/glib/demo/selections.c /*
* Copyright (C) 2010 Carlos Garcia Campos <carlosgc@gnome.org>
*
* 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, 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include <cairo.h>
#include "selections.h"
typedef struct {
PopplerDocument *doc;
/* Properties */
gint page_index;
gdouble scale;
GtkWidget *swindow;
GtkWidget *darea;
GtkWidget *fg_color_button;
GtkWidget *bg_color_button;
PopplerPage *page;
cairo_surface_t *surface;
GdkPoint start;
GdkPoint stop;
PopplerRectangle doc_area;
cairo_surface_t *selection_surface;
PopplerSelectionStyle style;
PopplerColor glyph_color;
PopplerColor background_color;
guint selections_idle;
cairo_region_t *selection_region;
cairo_region_t *selected_region;
GdkCursorType cursor;
gchar *selected_text;
} PgdSelectionsDemo;
static void
pgd_selections_clear_selections (PgdSelectionsDemo *demo)
{
demo->start.x = -1;
if (demo->selection_surface) {
cairo_surface_destroy (demo->selection_surface);
demo->selection_surface = NULL;
}
if (demo->selection_region) {
cairo_region_destroy (demo->selection_region);
demo->selection_region = NULL;
}
if (demo->selected_text) {
g_free (demo->selected_text);
demo->selected_text = NULL;
}
if (demo->selected_region) {
cairo_region_destroy (demo->selected_region);
demo->selected_region = NULL;
}
}
static void
pgd_selections_free (PgdSelectionsDemo *demo)
{
if (!demo)
return;
if (demo->selections_idle > 0) {
g_source_remove (demo->selections_idle);
demo->selections_idle = 0;
}
if (demo->doc) {
g_object_unref (demo->doc);
demo->doc = NULL;
}
if (demo->page) {
g_object_unref (demo->page);
demo->page = NULL;
}
if (demo->surface) {
cairo_surface_destroy (demo->surface);
demo->surface = NULL;
}
pgd_selections_clear_selections (demo);
g_free (demo);
}
static void
pgd_selections_update_selection_region (PgdSelectionsDemo *demo)
{
PopplerRectangle area = { 0, 0, 0, 0 };
if (demo->selection_region)
cairo_region_destroy (demo->selection_region);
poppler_page_get_size (demo->page, &area.x2, &area.y2);
demo->selection_region = poppler_page_get_selected_region (demo->page,
1.0,
POPPLER_SELECTION_GLYPH,
&area);
}
static void
pgd_selections_update_seleted_text (PgdSelectionsDemo *demo)
{
GList *region;
gchar *text;
if (demo->selected_region)
cairo_region_destroy (demo->selected_region);
demo->selected_region = poppler_page_get_selected_region (demo->page,
1.0,
demo->style,
&demo->doc_area);
if (demo->selected_text)
g_free (demo->selected_text);
demo->selected_text = NULL;
text = poppler_page_get_selected_text (demo->page,
demo->style,
&demo->doc_area);
if (text) {
demo->selected_text = g_utf8_normalize (text, -1, G_NORMALIZE_NFKC);
g_free (text);
}
}
static void
pgd_selections_update_cursor (PgdSelectionsDemo *demo,
GdkCursorType cursor_type)
{
GdkWindow *window = gtk_widget_get_window (demo->darea);
GdkCursor *cursor = NULL;
if (cursor_type == demo->cursor)
return;
if (cursor_type != GDK_LAST_CURSOR) {
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (demo->darea),
cursor_type);
}
demo->cursor = cursor_type;
gdk_window_set_cursor (window, cursor);
gdk_flush ();
if (cursor)
gdk_cursor_unref (cursor);
}
static gboolean
pgd_selections_render_selections (PgdSelectionsDemo *demo)
{
PopplerRectangle doc_area;
gdouble page_width, page_height;
cairo_t *cr;
if (!demo->page || demo->start.x == -1) {
demo->selections_idle = 0;
return FALSE;
}
poppler_page_get_size (demo->page, &page_width, &page_height);
page_width *= demo->scale;
page_height *= demo->scale;
doc_area.x1 = demo->start.x / demo->scale;
doc_area.y1 = demo->start.y / demo->scale;
doc_area.x2 = demo->stop.x / demo->scale;
doc_area.y2 = demo->stop.y / demo->scale;
if (demo->selection_surface)
cairo_surface_destroy (demo->selection_surface);
demo->selection_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
page_width, page_height);
cr = cairo_create (demo->selection_surface);
if (demo->scale != 1.0)
cairo_scale (cr, demo->scale, demo->scale);
poppler_page_render_selection (demo->page, cr,
&doc_area, &demo->doc_area,
demo->style,
&demo->glyph_color,
&demo->background_color);
cairo_destroy (cr);
demo->doc_area = doc_area;
gtk_widget_queue_draw (demo->darea);
demo->selections_idle = 0;
return FALSE;
}
static gboolean
pgd_selections_drawing_area_expose (GtkWidget *area,
GdkEventExpose *event,
PgdSelectionsDemo *demo)
{
cairo_t *cr;
if (!demo->surface)
return FALSE;
gdk_window_clear (gtk_widget_get_window (area));
cr = gdk_cairo_create (gtk_widget_get_window (area));
cairo_save (cr);
cairo_set_source_surface (cr, demo->surface, 0, 0);
cairo_paint (cr);
cairo_restore (cr);
if (demo->selection_surface) {
cairo_set_source_surface (cr, demo->selection_surface, 0, 0);
cairo_paint (cr);
}
cairo_destroy (cr);
return TRUE;
}
static gboolean
pgd_selections_drawing_area_button_press (GtkWidget *area,
GdkEventButton *event,
PgdSelectionsDemo *demo)
{
if (!demo->page)
return FALSE;
if (event->button != 1)
return FALSE;
demo->start.x = event->x;
demo->start.y = event->y;
demo->stop = demo->start;
switch (event->type) {
case GDK_2BUTTON_PRESS:
demo->style = POPPLER_SELECTION_WORD;
break;
case GDK_3BUTTON_PRESS:
demo->style = POPPLER_SELECTION_LINE;
break;
default:
demo->style = POPPLER_SELECTION_GLYPH;
}
pgd_selections_render_selections (demo);
return TRUE;
}
static gboolean
pgd_selections_drawing_area_motion_notify (GtkWidget *area,
GdkEventMotion *event,
PgdSelectionsDemo *demo)
{
if (!demo->page)
return FALSE;
if (demo->start.x != -1) {
demo->stop.x = event->x;
demo->stop.y = event->y;
if (demo->selections_idle == 0) {
demo->selections_idle =
g_idle_add ((GSourceFunc)pgd_selections_render_selections,
demo);
}
} else {
gboolean over_text;
over_text = cairo_region_contains_point (demo->selection_region,
event->x / demo->scale,
event->y / demo->scale);
pgd_selections_update_cursor (demo, over_text ? GDK_XTERM : GDK_LAST_CURSOR);
}
return TRUE;
}
static gboolean
pgd_selections_drawing_area_button_release (GtkWidget *area,
GdkEventButton *event,
PgdSelectionsDemo *demo)
{
if (!demo->page)
return FALSE;
if (event->button != 1)
return FALSE;
if (demo->start.x != -1)
pgd_selections_update_seleted_text (demo);
demo->start.x = -1;
if (demo->selections_idle > 0) {
g_source_remove (demo->selections_idle);
demo->selections_idle = 0;
}
return TRUE;
}
static void
pgd_selections_drawing_area_realize (GtkWidget *area,
PgdSelectionsDemo *demo)
{
GtkStyle *style = gtk_widget_get_style (area);
gtk_widget_add_events (area,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK);
g_object_set (area, "has-tooltip", TRUE, NULL);
gtk_color_button_set_color (GTK_COLOR_BUTTON (demo->fg_color_button),
&style->text[GTK_STATE_SELECTED]);
gtk_color_button_set_color (GTK_COLOR_BUTTON (demo->bg_color_button),
&style->base[GTK_STATE_SELECTED]);
}
static gboolean
pgd_selections_drawing_area_query_tooltip (GtkWidget *area,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip *tooltip,
PgdSelectionsDemo *demo)
{
gboolean over_selection;
if (!demo->selected_text)
return FALSE;
over_selection = cairo_region_contains_point (demo->selected_region,
x / demo->scale,
y / demo->scale);
if (over_selection) {
GdkRectangle selection_area;
cairo_region_get_extents (demo->selected_region,
(cairo_rectangle_int_t *)&selection_area);
selection_area.x *= demo->scale;
selection_area.y *= demo->scale;
selection_area.width *= demo->scale;
selection_area.height *= demo->scale;
gtk_tooltip_set_text (tooltip, demo->selected_text);
gtk_tooltip_set_tip_area (tooltip, &selection_area);
return TRUE;
}
return FALSE;
}
static void
pgd_selections_render (GtkButton *button,
PgdSelectionsDemo *demo)
{
gdouble page_width, page_height;
cairo_t *cr;
if (!demo->page)
demo->page = poppler_document_get_page (demo->doc, demo->page_index);
if (!demo->page)
return;
pgd_selections_clear_selections (demo);
pgd_selections_update_selection_region (demo);
if (demo->surface)
cairo_surface_destroy (demo->surface);
demo->surface = NULL;
poppler_page_get_size (demo->page, &page_width, &page_height);
page_width *= demo->scale;
page_height *= demo->scale;
demo->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
page_width, page_height);
cr = cairo_create (demo->surface);
cairo_save (cr);
if (demo->scale != 1.0)
cairo_scale (cr, demo->scale, demo->scale);
poppler_page_render (demo->page, cr);
cairo_restore (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
cairo_set_source_rgb (cr, 1., 1., 1.);
cairo_paint (cr);
cairo_destroy (cr);
gtk_widget_set_size_request (demo->darea, page_width, page_height);
gtk_widget_queue_draw (demo->darea);
}
static void
pgd_selections_page_selector_value_changed (GtkSpinButton *spinbutton,
PgdSelectionsDemo *demo)
{
demo->page_index = (gint)gtk_spin_button_get_value (spinbutton) - 1;
if (demo->page)
g_object_unref (demo->page);
demo->page = NULL;
}
static void
pgd_selections_scale_selector_value_changed (GtkSpinButton *spinbutton,
PgdSelectionsDemo *demo)
{
demo->scale = gtk_spin_button_get_value (spinbutton);
}
static void
pgd_selections_fg_color_changed (GtkColorButton *button,
GParamSpec *pspec,
PgdSelectionsDemo *demo)
{
GdkColor color;
gtk_color_button_get_color (GTK_COLOR_BUTTON (button), &color);
demo->glyph_color.red = color.red;
demo->glyph_color.green = color.green;
demo->glyph_color.blue = color.blue;
}
static void
pgd_selections_bg_color_changed (GtkColorButton *button,
GParamSpec *pspec,
PgdSelectionsDemo *demo)
{
GdkColor color;
gtk_color_button_get_color (GTK_COLOR_BUTTON (button), &color);
demo->background_color.red = color.red;
demo->background_color.green = color.green;
demo->background_color.blue = color.blue;
}
GtkWidget *
pgd_selections_properties_selector_create (PgdSelectionsDemo *demo)
{
GtkWidget *hbox, *vbox;
GtkWidget *label;
GtkWidget *page_hbox, *page_selector;
GtkWidget *scale_hbox, *scale_selector;
GtkWidget *rotate_hbox, *rotate_selector;
GtkWidget *color_hbox;
GtkWidget *button;
gint n_pages;
gchar *str;
n_pages = poppler_document_get_n_pages (demo->doc);
vbox = gtk_vbox_new (FALSE, 6);
hbox = gtk_hbox_new (FALSE, 12);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
gtk_widget_show (hbox);
page_hbox = gtk_hbox_new (FALSE, 6);
label = gtk_label_new ("Page:");
gtk_box_pack_start (GTK_BOX (page_hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
page_selector = gtk_spin_button_new_with_range (1, n_pages, 1);
g_signal_connect (G_OBJECT (page_selector), "value-changed",
G_CALLBACK (pgd_selections_page_selector_value_changed),
(gpointer)demo);
gtk_box_pack_start (GTK_BOX (page_hbox), page_selector, TRUE, TRUE, 0);
gtk_widget_show (page_selector);
str = g_strdup_printf ("of %d", n_pages);
label = gtk_label_new (str);
gtk_box_pack_start (GTK_BOX (page_hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
g_free (str);
gtk_box_pack_start (GTK_BOX (hbox), page_hbox, FALSE, TRUE, 0);
gtk_widget_show (page_hbox);
scale_hbox = gtk_hbox_new (FALSE, 6);
label = gtk_label_new ("Scale:");
gtk_box_pack_start (GTK_BOX (scale_hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
scale_selector = gtk_spin_button_new_with_range (0, 10.0, 0.1);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (scale_selector), 1.0);
g_signal_connect (G_OBJECT (scale_selector), "value-changed",
G_CALLBACK (pgd_selections_scale_selector_value_changed),
(gpointer)demo);
gtk_box_pack_start (GTK_BOX (scale_hbox), scale_selector, TRUE, TRUE, 0);
gtk_widget_show (scale_selector);
gtk_box_pack_start (GTK_BOX (hbox), scale_hbox, FALSE, TRUE, 0);
gtk_widget_show (scale_hbox);
rotate_hbox = gtk_hbox_new (FALSE, 6);
label = gtk_label_new ("Rotate:");
gtk_box_pack_start (GTK_BOX (rotate_hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
rotate_selector = gtk_combo_box_new_text ();
gtk_combo_box_append_text (GTK_COMBO_BOX (rotate_selector), "0");
gtk_combo_box_append_text (GTK_COMBO_BOX (rotate_selector), "90");
gtk_combo_box_append_text (GTK_COMBO_BOX (rotate_selector), "180");
gtk_combo_box_append_text (GTK_COMBO_BOX (rotate_selector), "270");
gtk_combo_box_set_active (GTK_COMBO_BOX (rotate_selector), 0);
#if 0
g_signal_connect (G_OBJECT (rotate_selector), "changed",
G_CALLBACK (pgd_selections_rotate_selector_changed),
(gpointer)demo);
#endif
gtk_box_pack_start (GTK_BOX (rotate_hbox), rotate_selector, TRUE, TRUE, 0);
gtk_widget_show (rotate_selector);
gtk_box_pack_start (GTK_BOX (hbox), rotate_hbox, FALSE, TRUE, 0);
gtk_widget_show (rotate_hbox);
hbox = gtk_hbox_new (FALSE, 12);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
gtk_widget_show (hbox);
color_hbox = gtk_hbox_new (FALSE, 6);
label = gtk_label_new ("Foreground Color:");
gtk_box_pack_start (GTK_BOX (color_hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
demo->fg_color_button = gtk_color_button_new ();
g_signal_connect (demo->fg_color_button, "notify::color",
G_CALLBACK (pgd_selections_fg_color_changed),
(gpointer)demo);
gtk_box_pack_start (GTK_BOX (color_hbox), demo->fg_color_button, TRUE, TRUE, 0);
gtk_widget_show (demo->fg_color_button);
gtk_box_pack_start (GTK_BOX (hbox), color_hbox, FALSE, TRUE, 0);
gtk_widget_show (color_hbox);
color_hbox = gtk_hbox_new (FALSE, 6);
label = gtk_label_new ("Background Color:");
gtk_box_pack_start (GTK_BOX (color_hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
demo->bg_color_button = gtk_color_button_new ();
g_signal_connect (demo->bg_color_button, "notify::color",
G_CALLBACK (pgd_selections_bg_color_changed),
(gpointer)demo);
gtk_box_pack_start (GTK_BOX (color_hbox), demo->bg_color_button, TRUE, TRUE, 0);
gtk_widget_show (demo->bg_color_button);
gtk_box_pack_start (GTK_BOX (hbox), color_hbox, FALSE, TRUE, 0);
gtk_widget_show (color_hbox);
button = gtk_button_new_with_label ("Render");
g_signal_connect (G_OBJECT (button), "clicked",
G_CALLBACK (pgd_selections_render),
(gpointer)demo);
gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, TRUE, 0);
gtk_widget_show (button);
return vbox;
}
GtkWidget *
pgd_selections_create_widget (PopplerDocument *document)
{
PgdSelectionsDemo *demo;
GtkWidget *vbox, *hbox;
demo = g_new0 (PgdSelectionsDemo, 1);
demo->doc = g_object_ref (document);
demo->scale = 1.0;
demo->cursor = GDK_LAST_CURSOR;
pgd_selections_clear_selections (demo);
vbox = gtk_vbox_new (FALSE, 6);
hbox = pgd_selections_properties_selector_create (demo);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, TRUE, 6);
gtk_widget_show (hbox);
demo->darea = gtk_drawing_area_new ();
g_signal_connect (demo->darea, "realize",
G_CALLBACK (pgd_selections_drawing_area_realize),
(gpointer)demo);
g_signal_connect (demo->darea, "expose_event",
G_CALLBACK (pgd_selections_drawing_area_expose),
(gpointer)demo);
g_signal_connect (demo->darea, "button_press_event",
G_CALLBACK (pgd_selections_drawing_area_button_press),
(gpointer)demo);
g_signal_connect (demo->darea, "motion_notify_event",
G_CALLBACK (pgd_selections_drawing_area_motion_notify),
(gpointer)demo);
g_signal_connect (demo->darea, "button_release_event",
G_CALLBACK (pgd_selections_drawing_area_button_release),
(gpointer)demo);
g_signal_connect (demo->darea, "query_tooltip",
G_CALLBACK (pgd_selections_drawing_area_query_tooltip),
(gpointer)demo);
demo->swindow = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (demo->swindow),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (demo->swindow),
demo->darea);
gtk_widget_show (demo->darea);
gtk_box_pack_start (GTK_BOX (vbox), demo->swindow, TRUE, TRUE, 0);
gtk_widget_show (demo->swindow);
g_object_weak_ref (G_OBJECT (demo->swindow),
(GWeakNotify)pgd_selections_free,
(gpointer)demo);
return vbox;
}
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