Initial commit of previewer code for plugin

This is a dump of the evince-previewer code from the gnome-2-30 branch
of evince (commit 38693288). This code will be converted into a widget
in a convenience library to be used from the mozilla plugin.

The source for evince's libmisc have also been copied with the
previewer code.

1 files changed, 495 insertions, 0 deletions

diff --git a/previewer/ev-page-action-widget.c b/previewer/ev-page-action-widget.c
new file mode 100644
index 0000000..bb8ef2e
--- /dev/null
+++ b/previewer/ev-page-action-widget.c
@@ -0,0 +1,495 @@
+/*
+ *  Copyright (C) 2003, 2004 Marco Pesenti Gritti
+ *  Copyright (C) 2003, 2004 Christian Persch
+ *
+ *  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 <string.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include <evince-document.h>
+#include "ev-page-action.h"
+#include "ev-page-action-widget.h"
+
+/* Widget we pass back */
+static void  ev_page_action_widget_init       (EvPageActionWidget      *action_widget);
+static void  ev_page_action_widget_class_init (EvPageActionWidgetClass *action_widget);
+
+enum
+{
+	WIDGET_ACTIVATE_LINK,
+	WIDGET_N_SIGNALS
+};
+
+struct _EvPageActionWidget
+{
+	GtkToolItem parent;
+
+	EvDocument *document;
+	EvDocumentModel *doc_model;
+
+	GtkWidget *entry;
+	GtkWidget *label;
+	guint signal_id;
+	GtkTreeModel *filter_model;
+	GtkTreeModel *model;
+};
+
+static guint widget_signals[WIDGET_N_SIGNALS] = {0, };
+
+G_DEFINE_TYPE (EvPageActionWidget, ev_page_action_widget, GTK_TYPE_TOOL_ITEM)
+
+static void
+update_pages_label (EvPageActionWidget *action_widget,
+		    gint                page)
+{
+	char *label_text;
+	gint n_pages;
+
+	n_pages = ev_document_get_n_pages (action_widget->document);
+	if (ev_document_has_text_page_labels (action_widget->document)) {
+		label_text = g_strdup_printf (_("(%d of %d)"), page + 1, n_pages);
+	} else {
+		label_text = g_strdup_printf (_("of %d"), n_pages);
+	}
+	gtk_label_set_text (GTK_LABEL (action_widget->label), label_text);
+	g_free (label_text);
+}
+
+static void
+ev_page_action_widget_set_current_page (EvPageActionWidget *action_widget,
+					gint                page)
+{
+	if (page >= 0) {
+		gchar *page_label;
+
+		gtk_entry_set_width_chars (GTK_ENTRY (action_widget->entry),
+					   CLAMP (ev_document_get_max_label_len (action_widget->document),
+						  6, 12));
+
+		page_label = ev_document_get_page_label (action_widget->document, page);
+		gtk_entry_set_text (GTK_ENTRY (action_widget->entry), page_label);
+		gtk_editable_set_position (GTK_EDITABLE (action_widget->entry), -1);
+		g_free (page_label);
+
+	} else {
+		gtk_entry_set_text (GTK_ENTRY (action_widget->entry), "");
+	}
+
+	update_pages_label (action_widget, page);
+}
+
+static void
+page_changed_cb (EvDocumentModel    *model,
+		 gint                old_page,
+		 gint                new_page,
+		 EvPageActionWidget *action_widget)
+{
+	ev_page_action_widget_set_current_page (action_widget, new_page);
+}
+
+static gboolean
+page_scroll_cb (EvPageActionWidget *action_widget, GdkEventScroll *event)
+{
+	EvDocumentModel *model = action_widget->doc_model;
+	gint pageno;
+
+	pageno = ev_document_model_get_page (model);
+	if ((event->direction == GDK_SCROLL_DOWN) &&
+	    (pageno < ev_document_get_n_pages (action_widget->document) - 1))
+		pageno++;
+	if ((event->direction == GDK_SCROLL_UP) && (pageno > 0))
+		pageno--;
+	ev_document_model_set_page (model, pageno);
+
+	return TRUE;
+}
+
+static void
+activate_cb (EvPageActionWidget *action_widget)
+{
+	EvDocumentModel *model;
+	const char *text;
+	EvLinkDest *link_dest;
+	EvLinkAction *link_action;
+	EvLink *link;
+	gchar *link_text;
+	gint current_page;
+
+	model = action_widget->doc_model;
+	current_page = ev_document_model_get_page (model);
+
+	text = gtk_entry_get_text (GTK_ENTRY (action_widget->entry));
+
+	link_dest = ev_link_dest_new_page_label (text);
+	link_action = ev_link_action_new_dest (link_dest);
+	link_text = g_strdup_printf ("Page: %s", text);
+	link = ev_link_new (link_text, link_action);
+
+	g_signal_emit (action_widget, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
+
+	g_object_unref (link);
+	g_free (link_text);
+
+	if (current_page == ev_document_model_get_page (model))
+		ev_page_action_widget_set_current_page (action_widget, current_page);
+}
+
+static void
+ev_page_action_widget_init (EvPageActionWidget *action_widget)
+{
+	GtkWidget *hbox;
+	AtkObject *obj;
+
+	hbox = gtk_hbox_new (FALSE, 0);
+	gtk_box_set_spacing (GTK_BOX (hbox), 6);
+
+	action_widget->entry = gtk_entry_new ();
+	gtk_widget_add_events (action_widget->entry,
+			       GDK_BUTTON_MOTION_MASK);
+	gtk_entry_set_width_chars (GTK_ENTRY (action_widget->entry), 5);
+	gtk_entry_set_text (GTK_ENTRY (action_widget->entry), "");
+	g_signal_connect_swapped (action_widget->entry, "scroll-event",
+				  G_CALLBACK (page_scroll_cb),
+				  action_widget);
+	g_signal_connect_swapped (action_widget->entry, "activate",
+				  G_CALLBACK (activate_cb),
+				  action_widget);
+
+	obj = gtk_widget_get_accessible (action_widget->entry);
+	atk_object_set_name (obj, "page-label-entry");
+
+	gtk_box_pack_start (GTK_BOX (hbox), action_widget->entry,
+			    FALSE, FALSE, 0);
+	gtk_widget_show (action_widget->entry);
+
+	action_widget->label = gtk_label_new (NULL);
+	gtk_box_pack_start (GTK_BOX (hbox), action_widget->label,
+			    FALSE, FALSE, 0);
+	gtk_widget_show (action_widget->label);
+
+	gtk_container_set_border_width (GTK_CONTAINER (action_widget), 6);
+	gtk_container_add (GTK_CONTAINER (action_widget), hbox);
+	gtk_widget_show (hbox);
+
+	gtk_widget_show (GTK_WIDGET (action_widget));
+}
+
+static void
+ev_page_action_widget_document_changed_cb (EvDocumentModel    *model,
+					   GParamSpec         *pspec,
+					   EvPageActionWidget *action_widget)
+{
+	EvDocument *document = ev_document_model_get_document (model);
+
+	g_object_ref (document);
+	if (action_widget->document)
+		g_object_unref (action_widget->document);
+	action_widget->document = document;
+
+	if (action_widget->signal_id > 0) {
+		g_signal_handler_disconnect (action_widget->doc_model,
+					     action_widget->signal_id);
+		action_widget->signal_id = 0;
+	}
+	action_widget->signal_id =
+		g_signal_connect_object (action_widget->doc_model,
+					 "page-changed",
+					 G_CALLBACK (page_changed_cb),
+					 action_widget, 0);
+
+	ev_page_action_widget_set_current_page (action_widget,
+						ev_document_model_get_page (model));
+}
+
+void
+ev_page_action_widget_set_model (EvPageActionWidget *action_widget,
+				 EvDocumentModel    *model)
+{
+	if (action_widget->doc_model) {
+		g_object_remove_weak_pointer (G_OBJECT (action_widget->doc_model),
+					      (gpointer)&action_widget->doc_model);
+	}
+	action_widget->doc_model = model;
+	g_object_add_weak_pointer (G_OBJECT (model),
+				   (gpointer)&action_widget->doc_model);
+
+	g_signal_connect (model, "notify::document",
+			  G_CALLBACK (ev_page_action_widget_document_changed_cb),
+			  action_widget);
+}
+
+static void
+ev_page_action_widget_finalize (GObject *object)
+{
+	EvPageActionWidget *action_widget = EV_PAGE_ACTION_WIDGET (object);
+
+	if (action_widget->doc_model != NULL) {
+		if (action_widget->signal_id > 0) {
+			g_signal_handler_disconnect (action_widget->doc_model,
+						     action_widget->signal_id);
+			action_widget->signal_id = 0;
+		}
+		g_object_remove_weak_pointer (G_OBJECT (action_widget->doc_model),
+					      (gpointer)&action_widget->doc_model);
+		action_widget->doc_model = NULL;
+	}
+
+	if (action_widget->document) {
+		g_object_unref (action_widget->document);
+		action_widget->document = NULL;
+	}
+
+	G_OBJECT_CLASS (ev_page_action_widget_parent_class)->finalize (object);
+}
+
+static void
+ev_page_action_widget_class_init (EvPageActionWidgetClass *class)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+	object_class->finalize = ev_page_action_widget_finalize;
+
+	widget_signals[WIDGET_ACTIVATE_LINK] =
+		g_signal_new ("activate_link",
+			      G_OBJECT_CLASS_TYPE (object_class),
+			      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+			      G_STRUCT_OFFSET (EvPageActionClass, activate_link),
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__OBJECT,
+			      G_TYPE_NONE, 1,
+			      G_TYPE_OBJECT);
+
+}
+
+static gboolean
+match_selected_cb (GtkEntryCompletion *completion,
+		   GtkTreeModel       *filter_model,
+		   GtkTreeIter        *filter_iter,
+		   EvPageActionWidget *proxy)
+{
+	EvLink *link;
+	GtkTreeIter *iter;
+
+	gtk_tree_model_get (filter_model, filter_iter,
+			    0, &iter,
+			    -1);
+	gtk_tree_model_get (proxy->model, iter,
+			    EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
+			    -1);
+
+	g_signal_emit (proxy, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
+
+	if (link)
+		g_object_unref (link);
+
+	gtk_tree_iter_free (iter);
+	
+	return TRUE;
+}
+		   
+
+static void
+display_completion_text (GtkCellLayout      *cell_layout,
+			 GtkCellRenderer    *renderer,
+			 GtkTreeModel       *filter_model,
+			 GtkTreeIter        *filter_iter,
+			 EvPageActionWidget *proxy)
+{
+	EvLink *link;
+	GtkTreeIter *iter;
+
+	gtk_tree_model_get (filter_model, filter_iter,
+			    0, &iter,
+			    -1);
+	gtk_tree_model_get (proxy->model, iter,
+			    EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
+			    -1);
+
+	g_object_set (renderer, "text", ev_link_get_title (link), NULL);
+
+	if (link)
+		g_object_unref (link);
+	
+	gtk_tree_iter_free (iter);
+}
+
+static gboolean
+match_completion (GtkEntryCompletion *completion,
+		  const gchar        *key,
+		  GtkTreeIter        *filter_iter,
+		  EvPageActionWidget *proxy)
+{
+	EvLink *link;
+	GtkTreeIter *iter;
+	const gchar *text = NULL;
+
+	gtk_tree_model_get (gtk_entry_completion_get_model (completion),
+			    filter_iter,
+			    0, &iter,
+			    -1);
+	gtk_tree_model_get (proxy->model, iter,
+			    EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
+			    -1);
+
+
+	if (link) {
+		text = ev_link_get_title (link);
+		g_object_unref (link);
+	}
+
+	gtk_tree_iter_free (iter);
+
+	if (text && key) {
+		gchar *normalized_text;
+		gchar *normalized_key;
+		gchar *case_normalized_text;
+		gchar *case_normalized_key;
+		gboolean retval = FALSE;
+
+		normalized_text = g_utf8_normalize (text, -1, G_NORMALIZE_ALL);
+		normalized_key = g_utf8_normalize (key, -1, G_NORMALIZE_ALL);
+		case_normalized_text = g_utf8_casefold (normalized_text, -1);
+		case_normalized_key = g_utf8_casefold (normalized_key, -1);
+
+		if (strstr (case_normalized_text, case_normalized_key))
+			retval = TRUE;
+
+		g_free (normalized_text);
+		g_free (normalized_key);
+		g_free (case_normalized_text);
+		g_free (case_normalized_key);
+
+		return retval;
+	}
+
+	return FALSE;
+}
+
+/* user data to set on the widget. */
+#define EPA_FILTER_MODEL_DATA "epa-filter-model"
+
+static gboolean
+build_new_tree_cb (GtkTreeModel *model,
+		   GtkTreePath  *path,
+		   GtkTreeIter  *iter,
+		   gpointer      data)
+{
+	GtkTreeModel *filter_model = GTK_TREE_MODEL (data);
+	EvLink *link;
+	EvLinkAction *action;
+	EvLinkActionType type;
+
+	gtk_tree_model_get (model, iter,
+			    EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
+			    -1);
+
+	if (!link)
+		return FALSE;
+
+	action = ev_link_get_action (link);
+	if (!action) {
+		g_object_unref (link);
+		return FALSE;
+	}
+	
+	type = ev_link_action_get_action_type (action);
+
+	if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
+		GtkTreeIter filter_iter;
+
+		gtk_list_store_append (GTK_LIST_STORE (filter_model), &filter_iter);
+		gtk_list_store_set (GTK_LIST_STORE (filter_model), &filter_iter,
+				    0, iter,
+				    -1);
+	}
+	
+	g_object_unref (link);
+	
+	return FALSE;
+}
+
+static GtkTreeModel *
+get_filter_model_from_model (GtkTreeModel *model)
+{
+	GtkTreeModel *filter_model;
+
+	filter_model =
+		(GtkTreeModel *) g_object_get_data (G_OBJECT (model), EPA_FILTER_MODEL_DATA);
+	if (filter_model == NULL) {
+		filter_model = (GtkTreeModel *) gtk_list_store_new (1, GTK_TYPE_TREE_ITER);
+
+		gtk_tree_model_foreach (model,
+					build_new_tree_cb,
+					filter_model);
+		g_object_set_data_full (G_OBJECT (model), EPA_FILTER_MODEL_DATA, filter_model, g_object_unref);
+	}
+
+	return filter_model;
+}
+
+
+void
+ev_page_action_widget_update_links_model (EvPageActionWidget *proxy, GtkTreeModel *model)
+{
+	GtkTreeModel *filter_model;
+	GtkEntryCompletion *completion;
+	GtkCellRenderer *renderer;
+
+	if (!model)
+		return;
+
+	/* Magik */
+	proxy->model = model;
+	filter_model = get_filter_model_from_model (model);
+
+	completion = gtk_entry_completion_new ();
+	g_object_set (G_OBJECT (completion),
+		      "popup-set-width", FALSE,
+		      "model", filter_model,
+		      NULL);
+
+	g_signal_connect (completion, "match-selected", G_CALLBACK (match_selected_cb), proxy);
+	gtk_entry_completion_set_match_func (completion,
+					     (GtkEntryCompletionMatchFunc) match_completion,
+					     proxy, NULL);
+
+	/* Set up the layout */
+	renderer = (GtkCellRenderer *)
+		g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
+			      "ellipsize", PANGO_ELLIPSIZE_END,
+			      "width_chars", 30,
+			      NULL);
+	gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion), renderer, TRUE);
+	gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (completion),
+					    renderer,
+					    (GtkCellLayoutDataFunc) display_completion_text,
+					    proxy, NULL);
+	gtk_entry_set_completion (GTK_ENTRY (proxy->entry), completion);
+
+	g_object_unref (completion);
+}
+
+void
+ev_page_action_widget_grab_focus (EvPageActionWidget *proxy)
+{
+	gtk_widget_grab_focus (proxy->entry);
+}
+