Merge pull request #84 from rootAvish/epub

Epub support in Atril

1 files changed, 873 insertions, 0 deletions

diff --git a/libview/ev-web-view.c b/libview/ev-web-view.c
new file mode 100644
index 00000000..b42da163
--- /dev/null
+++ b/libview/ev-web-view.c
@@ -0,0 +1,873 @@
+/* this file is part of atril, a mate document viewer
+ *
+ *  Copyright (C) 2014 Avishkar Gupta
+ *  Based on ev-view.c, also a part of atril, a mate document viewer.
+ *
+ * Atril 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.
+ *
+ * Atril 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 <glib/gi18n-lib.h>
+#include <gtk/gtk.h>
+#include <stdlib.h>
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+#include <webkit2/webkit2.h>
+#else
+#include <webkit/webkit.h>
+#endif
+
+#include "ev-web-view.h"
+#include "ev-document-model.h"
+#include "ev-jobs.h"
+
+#define EV_WEB_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_WEB_VIEW, EvWebViewClass))
+#define EV_IS_WEB_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_WEB_VIEW))
+#define EV_WEB_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_WEB_VIEW, EvWebViewClass))
+
+ typedef enum {
+ 	EV_WEB_VIEW_FIND_NEXT,
+ 	EV_WEB_VIEW_FIND_PREV
+ } EvWebViewFindDirection;
+
+typedef struct _SearchParams {
+	gboolean case_sensitive;
+	gchar*   search_string;
+	EvWebViewFindDirection direction;
+	gboolean search_jump;
+	gint     on_result;
+	guint   *results;
+}SearchParams;
+
+struct _EvWebView
+{
+	WebKitWebView web_view;
+	EvDocument *document;
+	EvDocumentModel *model;
+	gint current_page;
+	gboolean inverted_stylesheet ;
+	gboolean fullscreen;
+	SearchParams *search;
+#if GTK_CHECK_VERSION (3, 0, 0)
+	WebKitFindController *findcontroller;
+	WebKitFindOptions findoptions;
+	gdouble zoom_level;
+#endif
+	gchar *hlink;
+};
+
+struct _EvWebViewClass 
+{
+	WebKitWebViewClass base_class;
+};
+
+/*** Callbacks ***/
+static void       ev_web_view_change_page                   (EvWebView          *webview,
+						          							 gint                new_page);
+
+static void       ev_web_view_page_changed_cb               (EvDocumentModel     *model,
+														      gint                 old_page,
+															  gint                 new_page,
+														      EvWebView           *webview);
+/*** GObject ***/
+static void       ev_web_view_dispose                       (GObject             *object);
+
+static void       ev_web_view_finalize						(GObject             *object);
+static void       ev_web_view_class_init                    (EvWebViewClass      *klass);
+static void       ev_web_view_init                          (EvWebView           *webview);
+
+G_DEFINE_TYPE (EvWebView, ev_web_view, WEBKIT_TYPE_WEB_VIEW)
+
+static void
+web_view_update_range_and_current_page (EvWebView *webview)
+{
+	g_return_if_fail(EV_IS_WEB_VIEW(webview));
+	
+	if (ev_document_get_n_pages (webview->document) <= 0)
+		return;
+
+	ev_document_model_set_page(webview->model, 0);
+	webview->current_page = 0;
+	EvPage *webpage = ev_document_get_page(webview->document,0);
+	webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)webpage->backend_page);
+}
+
+static void
+ev_web_view_dispose (GObject *object)
+{
+	EvWebView *webview = EV_WEB_VIEW (object);
+
+	if (webview->document) {
+		g_object_unref(webview->document);
+		webview->document = NULL ;
+	}
+
+	if (webview->model) {
+		g_object_unref(webview->model);
+		webview->model = NULL;
+	}
+	
+	if (webview->hlink) {
+		g_free(webview->hlink);
+		webview->hlink = NULL;
+	}
+
+	if (webview->search) {
+		g_free(webview->search);
+		webview->search = NULL;
+	}
+
+	G_OBJECT_CLASS (ev_web_view_parent_class)->dispose (object);
+}
+
+static void
+ev_web_view_class_init (EvWebViewClass *klass)
+{
+	G_OBJECT_CLASS(klass)->finalize = ev_web_view_finalize;
+	G_OBJECT_CLASS(klass)->dispose = ev_web_view_dispose;
+}
+
+static void
+ev_web_view_init (EvWebView *webview)
+{
+	gtk_widget_set_can_focus (GTK_WIDGET (webview), TRUE);
+
+	gtk_widget_set_has_window (GTK_WIDGET (webview), TRUE);
+
+	webview->current_page = 0;
+
+	webview->search = g_new0(SearchParams, 1);
+	webview->search->search_string = NULL;
+
+	webview->search->on_result = -1 ;
+	webview->search->results = NULL;
+	webview->search->search_jump = TRUE ;
+	
+	webview->fullscreen = FALSE;
+	webview->inverted_stylesheet = FALSE;
+	webview->hlink = NULL;
+}
+
+static void
+ev_web_view_finalize (GObject *object)
+{
+	G_OBJECT_CLASS(ev_web_view_parent_class)->finalize(object);
+}
+
+/*** Callbacks ***/
+
+static void
+ev_web_view_change_page (EvWebView *webview,
+		         gint    new_page)
+{
+	g_return_if_fail(EV_IS_WEB_VIEW(webview));
+	
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS(webview->document);
+
+	webview->current_page = new_page;
+	ev_document_model_set_page(webview->model,new_page);
+#if GTK_CHECK_VERSION (3, 0, 0)
+	webkit_find_controller_search_finish(webview->findcontroller);
+#else
+	webkit_web_view_unmark_text_matches (WEBKIT_WEB_VIEW(webview));
+#endif
+	if (webview->hlink) {
+		webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)webview->hlink);
+		g_free(webview->hlink);
+		webview->hlink = NULL;
+	}
+	else {
+		EvPage *page = klass->get_page(webview->document,new_page);
+		webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)page->backend_page);
+	}
+}
+
+static void
+ev_web_view_page_changed_cb (EvDocumentModel *model,
+			     gint             old_page,
+			     gint     	      new_page,
+			     EvWebView       *webview)
+{
+	if (!webview->document)
+		return;
+
+	if (webview->current_page != new_page) {
+		ev_web_view_change_page (webview, new_page);
+	} else {
+		webkit_web_view_reload (WEBKIT_WEB_VIEW(webview));
+	}
+}
+
+GtkWidget*
+ev_web_view_new (void)
+{
+	GtkWidget *webview;
+
+	webview = g_object_new (EV_TYPE_WEB_VIEW, NULL);
+
+	#if GTK_CHECK_VERSION (3, 0, 0)
+		EV_WEB_VIEW(webview)->findcontroller = webkit_web_view_get_find_controller (WEBKIT_WEB_VIEW(webview));
+		EV_WEB_VIEW(webview)->findoptions = webkit_find_controller_get_options (EV_WEB_VIEW(webview)->findcontroller);
+
+		EV_WEB_VIEW(webview)->zoom_level = 1.0;
+
+		EV_WEB_VIEW(webview)->findoptions |= WEBKIT_FIND_OPTIONS_NONE;
+	#endif
+
+	return webview;
+}
+
+static void
+ev_web_view_document_changed_cb (EvDocumentModel *model,
+  			         GParamSpec      *pspec,
+			         EvWebView       *webview)
+{
+	g_return_if_fail(EV_IS_WEB_VIEW(webview));
+	
+	EvDocument *document = ev_document_model_get_document (model);
+
+	if (document != webview->document) {
+
+		if (webview->document )
+			g_object_unref(webview->document);
+
+		webview->document = document ;
+
+		if(webview->document) {
+			g_object_ref(webview->document);
+		}
+		webview->inverted_stylesheet = FALSE;
+		gint current_page = ev_document_model_get_page(model);
+		
+		ev_web_view_change_page (webview, current_page);
+		
+	}
+}       
+
+static void
+ev_web_view_inverted_colors_changed_cb (EvDocumentModel *model,
+				        GParamSpec      *pspec,
+				        EvWebView       *webview)
+{
+	EvDocument *document = ev_document_model_get_document(model);
+	
+	if (ev_document_model_get_inverted_colors(model) == TRUE) {
+		if (document == NULL) {
+			ev_document_model_set_inverted_colors(model,FALSE);
+			return;
+		}		
+		if (webview->inverted_stylesheet == FALSE) {
+			ev_document_check_add_night_sheet(document);
+			webview->inverted_stylesheet = TRUE;
+		}
+		ev_document_toggle_night_mode(document,TRUE);
+		webkit_web_view_reload(WEBKIT_WEB_VIEW(webview));
+	}
+	else {
+		if (document != NULL) {
+			ev_document_toggle_night_mode(document,FALSE);
+			webkit_web_view_reload(WEBKIT_WEB_VIEW(webview));
+		}
+	}
+}
+
+void
+ev_web_view_set_model (EvWebView          *webview,
+		       EvDocumentModel    *model)
+{
+	g_return_if_fail (EV_IS_WEB_VIEW (webview));
+	g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
+
+	if (model == webview->model)
+		return;
+
+	if (webview->model) {
+		g_signal_handlers_disconnect_by_func (webview->model,
+						      ev_web_view_document_changed_cb,
+						      webview);
+		g_signal_handlers_disconnect_by_func (webview->model,
+						      ev_web_view_page_changed_cb,
+						      webview);
+		g_object_unref (webview->model);
+	}
+	webview->model = g_object_ref (model);
+
+	/* Initialize webview from model */
+	webview->fullscreen = ev_document_model_get_fullscreen (webview->model);
+	webview->document = ev_document_model_get_document(webview->model);
+
+	ev_web_view_document_changed_cb (webview->model, NULL, webview);
+
+	g_signal_connect (webview->model, "notify::document",
+			  G_CALLBACK (ev_web_view_document_changed_cb),
+			  webview);
+	g_signal_connect (webview->model, "notify::inverted-colors",
+			  G_CALLBACK (ev_web_view_inverted_colors_changed_cb),
+			  webview);
+	g_signal_connect (webview->model,"page-changed",
+			  G_CALLBACK(ev_web_view_page_changed_cb),
+			  webview);
+}
+
+void
+ev_web_view_reload_page (EvWebView         *webview,
+                         gint               page)
+{
+	webkit_web_view_reload (WEBKIT_WEB_VIEW(webview));
+}
+
+void
+ev_web_view_reload (EvWebView *webview)
+{
+	web_view_update_range_and_current_page (webview);
+}
+
+
+gboolean
+ev_web_view_next_page (EvWebView *webview)
+{
+	int page, n_pages;
+
+	g_return_val_if_fail (EV_IS_WEB_VIEW (webview), FALSE);
+	
+	if (!webview->document)
+		return FALSE;
+
+	page = ev_document_model_get_page (webview->model);
+	n_pages = ev_document_get_n_pages (webview->document);
+
+	page = page + 1;
+
+	if (page < n_pages) {
+		ev_document_model_set_page (webview->model, page);
+		EvPage *webpage = ev_document_get_page(webview->document,page);
+		webview->current_page = page ;
+		webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)webpage->backend_page);
+		return TRUE;
+	} else if (page == n_pages) {
+		ev_document_model_set_page (webview->model, page - 1);
+		EvPage *webpage = ev_document_get_page(webview->document,page);
+		webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)webpage->backend_page);
+		return TRUE;
+	} else {
+		return FALSE;
+	}
+}
+
+gboolean
+ev_web_view_previous_page (EvWebView *webview)
+{
+	int page;
+
+	g_return_val_if_fail (EV_IS_WEB_VIEW (webview), FALSE);
+
+	if (!webview->document)
+		return FALSE;
+
+	page = ev_document_model_get_page (webview->model);
+
+	page = page - 1 ;
+
+	if (page >= 0) {
+		ev_document_model_set_page (webview->model, page);
+		EvPage *webpage = ev_document_get_page(webview->document,page);
+		webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)webpage->backend_page);
+		return TRUE;
+	} else if (page == -1) {
+		ev_document_model_set_page (webview->model, 0);
+		EvPage *webpage = ev_document_get_page(webview->document,page);
+		webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),(gchar*)webpage->backend_page);
+		return TRUE;
+	} else {	
+		return FALSE;
+	}
+}
+		
+void 
+ev_web_view_handle_link(EvWebView *webview,EvLink *link) 
+{
+	EvLinkAction *action = NULL;
+	EvLinkDest *dest = NULL;
+	EvLinkDestType dest_type ;
+	action = ev_link_get_action(link);
+
+	if (action == NULL)
+		return;
+
+	dest = ev_link_action_get_dest(action);
+	
+	if (dest == NULL)
+		return;
+
+	dest_type = ev_link_dest_get_dest_type(dest);
+	
+	switch(dest_type) {
+		case EV_LINK_DEST_TYPE_PAGE: {
+			ev_document_model_set_page(webview->model,ev_link_dest_get_page(dest));
+			break;
+		}
+
+		case EV_LINK_DEST_TYPE_PAGE_LABEL: {
+			const gchar *text = ev_link_dest_get_page_label (dest);
+			gint page = atoi(text);
+
+			if (page <= ev_document_get_n_pages(webview->document) && page > 0) {
+				ev_document_model_set_page(webview->model,page-1);
+			}
+			break;
+		}
+		case EV_LINK_DEST_TYPE_HLINK: {
+			const gchar *uri = ev_link_dest_get_named_dest(dest);
+			ev_document_model_set_page(webview->model,ev_link_dest_get_page(dest));
+			webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview),uri);
+			break;
+			
+		default:return;
+		}
+	}
+}
+/* Searching */
+
+#if !GTK_CHECK_VERSION (3, 0, 0)
+static void
+jump_to_find_result_on_page(EvWebView *webview,
+                            EvWebViewFindDirection direction)
+{
+	gboolean forward,wrap;
+	
+	if (direction == EV_WEB_VIEW_FIND_NEXT) {
+		forward = TRUE;
+		wrap = FALSE;
+	}
+	else {
+		forward = FALSE;
+		wrap = FALSE;
+	}
+
+	if (webview->search->search_jump) {
+		wrap = TRUE;
+	}
+	webkit_web_view_search_text (WEBKIT_WEB_VIEW(webview),
+	                             webview->search->search_string,
+	                             webview->search->case_sensitive,
+	                             forward,
+	                             wrap);
+
+	webview->search->search_jump = FALSE;
+}
+#endif
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void
+results_counted_cb(WebKitFindController *findcontroller,
+                   guint match_count,
+                   EvWebView *webview)
+{
+	if (match_count > 0 && webview->search->on_result < match_count) {
+		webkit_find_controller_search(findcontroller,
+			                          webview->search->search_string,
+			                          webview->findoptions,
+			                          match_count);
+		webview->search->search_jump = FALSE;
+	}
+}
+#endif
+/*
+ * Jump to find results once we have changed the page in the webview.
+ */
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void
+jump_to_find_results(EvWebView *webview,
+                     WebKitLoadEvent load_event,
+                     gpointer data)
+#else
+static void
+jump_to_find_results(EvWebView *webview,
+                    GParamSpec *pspec,
+                    gpointer    data)
+#endif
+{
+	#if !GTK_CHECK_VERSION (3, 0, 0)
+	gint n_results;
+	gboolean forward ;
+	gboolean wrap ;
+
+	if (webkit_web_view_get_load_status(WEBKIT_WEB_VIEW(webview)) != WEBKIT_LOAD_FINISHED) {
+		return;
+	}
+#else
+	if ( load_event != WEBKIT_LOAD_FINISHED) {
+		return;
+	}
+#endif
+	if (!webview->search->search_string) {
+		return;
+	}
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+	if (webview->search->direction == EV_WEB_VIEW_FIND_NEXT) {
+		webview->findoptions &= ~WEBKIT_FIND_OPTIONS_BACKWARDS;
+		webview->findoptions &= ~WEBKIT_FIND_OPTIONS_WRAP_AROUND;
+	}
+	else {
+		webview->findoptions |= WEBKIT_FIND_OPTIONS_BACKWARDS;
+		webview->findoptions |= WEBKIT_FIND_OPTIONS_WRAP_AROUND;
+	}
+
+	webkit_find_controller_count_matches (webview->findcontroller,
+	                                      webview->search->search_string,
+	                                      webview->findoptions,
+	                                      G_MAXUINT);
+#else
+	n_results = webkit_web_view_mark_text_matches (WEBKIT_WEB_VIEW(webview),
+	                                               webview->search->search_string,
+	                                               webview->search->case_sensitive,
+	                                               0);
+
+	ev_web_view_find_set_highlight_search(webview,TRUE);
+
+	if (webview->search->direction == EV_WEB_VIEW_FIND_NEXT) {
+		forward = TRUE ;
+		wrap = FALSE;
+	}
+	else {
+		forward = FALSE;
+		wrap = TRUE ;
+	}
+
+	if (n_results > 0 && webview->search->on_result < n_results) {
+		webkit_web_view_search_text (WEBKIT_WEB_VIEW(webview),
+			                         webview->search->search_string,
+			                         webview->search->case_sensitive,
+			                         forward,
+			                         wrap);
+	    
+		webview->search->search_jump = FALSE;
+	}
+#endif
+	webview->search->search_jump = FALSE;
+}
+
+static gint
+ev_web_view_find_get_n_results (EvWebView *webview, gint page)
+{
+	return webview->search->results[page];
+}
+
+/**
+ * jump_to_find_page
+ * @webview: #EvWebView instance
+ * @direction: Direction to look
+ * @shift: Shift from current page
+ *
+ * Jumps to the first page that has occurences of searched word.
+ * Uses a direction where to look and a shift from current page. 
+**/
+static void
+jump_to_find_page (EvWebView *webview, EvWebViewFindDirection direction, gint shift)
+{
+	int n_pages, i;
+
+	n_pages = ev_document_get_n_pages (webview->document);
+
+	for (i = 0; i < n_pages; i++) {
+		int page;
+
+		if (direction == EV_WEB_VIEW_FIND_NEXT)
+			page = webview->current_page + i;
+		else
+			page = webview->current_page - i;		
+		page += shift;
+
+		if (page >= n_pages) {
+			page = page - n_pages;
+		} else if (page < 0) 
+			page = page + n_pages;
+
+		if (page == webview->current_page && ev_web_view_find_get_n_results(webview,page) > 0) {
+#if !GTK_CHECK_VERSION (3, 0, 0)
+			jump_to_find_result_on_page(webview,EV_WEB_VIEW_FIND_NEXT);
+#else
+			if (direction == EV_WEB_VIEW_FIND_PREV) {
+				webview->findoptions |= WEBKIT_FIND_OPTIONS_WRAP_AROUND;
+				webview->findoptions |= WEBKIT_FIND_OPTIONS_BACKWARDS;
+			}
+			else {
+				if (webview->search->search_jump)
+					webview->findoptions |= WEBKIT_FIND_OPTIONS_WRAP_AROUND;
+				else
+					webview->findoptions &= ~WEBKIT_FIND_OPTIONS_WRAP_AROUND;
+				
+				webview->findoptions &= ~WEBKIT_FIND_OPTIONS_BACKWARDS;
+			}
+
+			webkit_find_controller_search (webview->findcontroller,
+			                               webview->search->search_string,
+			                               webview->findoptions,
+			                               /*Highlight all the results.*/
+			                               G_MAXUINT);
+			webview->search->search_jump = FALSE;
+#endif
+			break;
+		}
+
+		if (ev_web_view_find_get_n_results (webview, page) > 0) {
+			webview->search->direction = direction;
+#if !GTK_CHECK_VERSION (3, 0, 0)
+			webkit_web_view_unmark_text_matches (WEBKIT_WEB_VIEW(webview));
+#else
+			webkit_find_controller_search_finish(webview->findcontroller);
+#endif
+			ev_document_model_set_page (webview->model, page);
+			break;
+		}
+	}
+}
+
+void
+ev_web_view_find_changed (EvWebView *webview, guint *results, gchar *text,gboolean case_sensitive)
+{
+	webview->search->results = results; 
+	webview->search->on_result = 0;
+	webview->search->search_string = g_strdup(text);
+	webview->search->case_sensitive = case_sensitive;
+		if (webview->search->search_jump == TRUE) {
+#if GTK_CHECK_VERSION (3, 0, 0)
+		if (!case_sensitive) {
+			webview->findoptions |=	 WEBKIT_FIND_OPTIONS_CASE_INSENSITIVE;
+		}
+		else {
+			webview->findoptions &= ~WEBKIT_FIND_OPTIONS_CASE_INSENSITIVE;
+		}
+#endif
+		jump_to_find_page (webview, EV_WEB_VIEW_FIND_NEXT, 0);
+	}
+}	
+
+void
+ev_web_view_find_next (EvWebView *webview)
+{
+	gint n_results;
+
+	n_results = ev_web_view_find_get_n_results (webview, webview->current_page);
+	webview->search->on_result++;
+
+	if (webview->search->on_result >= n_results) {
+		webview->search->on_result = 0;
+		jump_to_find_page (webview, EV_WEB_VIEW_FIND_NEXT, 1);
+	} 
+	else {
+#if GTK_CHECK_VERSION (3, 0, 0)
+		webkit_find_controller_search_next(webview->findcontroller);
+#else
+		jump_to_find_result_on_page (webview, EV_WEB_VIEW_FIND_NEXT);
+#endif
+	}
+}
+
+void
+ev_web_view_find_previous (EvWebView *webview)
+{
+	webview->search->on_result--;
+
+	if (webview->search->on_result < 0) {
+		jump_to_find_page (webview, EV_WEB_VIEW_FIND_PREV, -1);
+		webview->search->on_result = MAX (0, ev_web_view_find_get_n_results (webview, webview->current_page) - 1);
+	} else {
+#if GTK_CHECK_VERSION (3, 0, 0)
+		webkit_find_controller_search_previous(webview->findcontroller);
+#else
+		jump_to_find_result_on_page (webview,EV_WEB_VIEW_FIND_PREV);
+#endif
+	}
+}
+
+void
+ev_web_view_find_search_changed (EvWebView *webview)
+{
+	/* search string has changed, focus on new search result */
+#if !GTK_CHECK_VERSION(3, 0, 0)	
+	webkit_web_view_unmark_text_matches(WEBKIT_WEB_VIEW(webview));
+#endif
+	if (webview->search->search_string) {
+		g_free(webview->search->search_string);
+		webview->search->search_string = NULL;
+	}
+#if GTK_CHECK_VERSION(3, 0, 0)	
+	webkit_find_controller_search_finish(webview->findcontroller);
+#endif
+	
+	webview->search->search_jump = TRUE;
+}
+
+#if !GTK_CHECK_VERSION (3, 0, 0)
+void
+ev_web_view_find_set_highlight_search (EvWebView *webview, gboolean value)
+{
+	webkit_web_view_set_highlight_text_matches (WEBKIT_WEB_VIEW(webview),value);
+}
+#endif
+
+void
+ev_web_view_find_cancel (EvWebView *webview)
+{
+#if GTK_CHECK_VERSION (3, 0, 0)
+	webkit_find_controller_search_finish (webview->findcontroller);
+#else
+	webkit_web_view_unmark_text_matches(WEBKIT_WEB_VIEW(webview));
+	ev_web_view_find_set_highlight_search(webview,FALSE);
+#endif
+}
+
+
+
+void 
+ev_web_view_set_handler(EvWebView *webview,gboolean visible)
+{
+	if (visible) {
+		g_signal_connect(webview,
+#if GTK_CHECK_VERSION (3, 0, 0)
+		                 "load-changed",
+#else
+			             "notify::load-status",
+#endif
+			             G_CALLBACK(jump_to_find_results),
+			             NULL);
+#if GTK_CHECK_VERSION (3, 0, 0)
+			g_signal_connect(webview->findcontroller,
+		                 "counted-matches",
+		                 G_CALLBACK(results_counted_cb),
+		                 webview);
+#endif
+	}
+	else {
+		g_signal_handlers_disconnect_by_func(webview,
+											 jump_to_find_results,
+											 NULL);		
+#if GTK_CHECK_VERSION (3, 0, 0)
+		g_signal_handlers_disconnect_by_func(webview,
+		                                     results_counted_cb,
+		                                     NULL);
+#endif
+	}
+}
+
+/* Selection and copying*/
+#if !GTK_CHECK_VERSION (3, 0, 0)
+gboolean 
+ev_web_view_get_has_selection(EvWebView *webview)
+{
+	return webkit_web_view_has_selection(WEBKIT_WEB_VIEW(webview));
+}
+#endif
+
+void
+ev_web_view_select_all(EvWebView *webview)
+{
+#if GTK_CHECK_VERSION (3, 0, 0)
+	webkit_web_view_execute_editing_command(WEBKIT_WEB_VIEW(webview),
+	                                        WEBKIT_EDITING_COMMAND_SELECT_ALL);
+#else
+	webkit_web_view_select_all(WEBKIT_WEB_VIEW(webview));
+#endif
+}
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void
+copy_text_cb(WebKitWebView *webview,
+             GAsyncResult *res,
+             gpointer data)
+{
+	gboolean okay_to_copy = webkit_web_view_can_execute_editing_command_finish (WEBKIT_WEB_VIEW(webview),
+	                                                                            res,
+	                                                                            NULL);
+
+	if (okay_to_copy) {
+		webkit_web_view_execute_editing_command (WEBKIT_WEB_VIEW(webview),
+		                                         WEBKIT_EDITING_COMMAND_COPY);
+	}
+}
+#endif
+
+void
+ev_web_view_copy(EvWebView *webview)
+{
+#if !GTK_CHECK_VERSION (3, 0, 0)
+	/* If for some reason we don't have a selection any longer,best to be safe */
+	if (ev_web_view_get_has_selection(webview) == FALSE)
+		return;
+	if (webkit_web_view_can_copy_clipboard(WEBKIT_WEB_VIEW(webview))) {
+		webkit_web_view_copy_clipboard(WEBKIT_WEB_VIEW(webview));
+	}
+#else
+	webkit_web_view_can_execute_editing_command(WEBKIT_WEB_VIEW(webview),
+	                                            WEBKIT_EDITING_COMMAND_COPY,
+	                                            NULL,
+	                                            (GAsyncReadyCallback)copy_text_cb,
+	                                            NULL);
+	                                            
+#endif
+	
+}
+
+/*Zoom control*/
+gboolean
+ev_web_view_zoom_in(EvWebView *webview)
+{
+#if GTK_CHECK_VERSION (3, 0, 0)
+	webkit_web_view_set_zoom_level (WEBKIT_WEB_VIEW(webview),
+	                                (webview->zoom_level+= 0.1));
+#else
+	webkit_web_view_zoom_in(WEBKIT_WEB_VIEW(webview));
+#endif
+	return TRUE;
+}
+
+gboolean
+ev_web_view_zoom_out(EvWebView *webview)
+{
+#if GTK_CHECK_VERSION (3, 0, 0)
+	if (webview->zoom_level == 1)
+		return FALSE;
+
+	webkit_web_view_set_zoom_level (WEBKIT_WEB_VIEW(webview),
+	                                (webview->zoom_level -= 0.1));
+#else
+	webkit_web_view_zoom_out(WEBKIT_WEB_VIEW(webview));
+#endif
+	return TRUE;
+}
+
+/**
+ * ev_web_view_disconnect_handlers
+ * @webview : #EvWebView instance
+ * 
+ * This function call will disconnect all model signal handlers from the webview, to ensure smooth operation of the Atril-view.
+ * Equivalent to function  ev_view_disconnect_handlers in ev-view.c
+ */
+void
+ev_web_view_disconnect_handlers(EvWebView *webview)
+{
+	g_signal_handlers_disconnect_by_func(webview->model,
+	                                     ev_web_view_document_changed_cb,
+	                                     webview);
+	g_signal_handlers_disconnect_by_func(webview->model,
+	                                     ev_web_view_inverted_colors_changed_cb,
+	                                     webview);
+	g_signal_handlers_disconnect_by_func(webview->model,
+	                                     ev_web_view_page_changed_cb,
+	                                     webview);
+}
\ No newline at end of file