evolution/mail/e-mail-display.c

/*
 * e-mail-display.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-mail-display.h"
#include "e-mail-display-popup-extension.h"

#include <glib/gi18n.h>
#include <gdk/gdk.h>

#include <em-format/e-mail-part-utils.h>
#include <em-format/e-mail-formatter-extension.h>
#include <em-format/e-mail-extension-registry.h>
#include <em-format/e-mail-part-attachment.h>
#include <em-format/e-mail-formatter-print.h>

#include "e-util/e-marshal.h"
#include "e-util/e-util.h"
#include "e-util/e-plugin-ui.h"
#include "e-util/e-file-request.h"
#include "e-util/e-stock-request.h"
#include "mail/em-composer-utils.h"
#include "mail/em-utils.h"
#include "mail/e-mail-request.h"
#include "mail/e-http-request.h"
#include "widgets/misc/e-attachment-bar.h"
#include "widgets/misc/e-attachment-button.h"

#include <camel/camel.h>

#include <JavaScriptCore/JavaScript.h>

#define d(x)

G_DEFINE_TYPE (
	EMailDisplay,
	e_mail_display,
	E_TYPE_WEB_VIEW);

#define E_MAIL_DISPLAY_GET_PRIVATE(obj) \
	(G_TYPE_INSTANCE_GET_PRIVATE \
	((obj), E_TYPE_MAIL_DISPLAY, EMailDisplayPrivate))

struct _EMailDisplayPrivate {
	EMailPartList *part_list;
	EMailFormatterMode mode;
	EMailFormatter *formatter;

	gboolean headers_collapsable;
	gboolean headers_collapsed;

        gint force_image_load: 1;

	GSettings *settings;

	GHashTable *widgets;

	guint scheduled_reload;
};

enum {
	PROP_0,
	PROP_MODE,
	PROP_PART_LIST,
	PROP_HEADERS_COLLAPSABLE,
	PROP_HEADERS_COLLAPSED,
};

static CamelDataCache *emd_global_http_cache = 0;

static const gchar *ui =
"<ui>"
"  <popup name='context'>"
"    <placeholder name='custom-actions-1'>"
"      <menuitem action='add-to-address-book'/>"
"      <menuitem action='send-reply'/>"
"    </placeholder>"
"    <placeholder name='custom-actions-3'>"
"      <menu action='search-folder-menu'>"
"        <menuitem action='search-folder-recipient'/>"
"        <menuitem action='search-folder-sender'/>"
"      </menu>"
"    </placeholder>"
"  </popup>"
"</ui>";

static const gchar *image_ui =
"<ui>"
"  <popup name='context'>"
"    <placeholder name='custom-actions-2'>"
"      <menuitem action='image-save'/>"
"    </placeholder>"
"  </popup>"
"</ui>";

static GtkActionEntry mailto_entries[] = {

	{ "add-to-address-book",
	  "contact-new",
	  N_("_Add to Address Book..."),
	  NULL,
	  NULL,  /* XXX Add a tooltip! */
	  NULL   /* Handled by EMailReader */ },

	{ "search-folder-recipient",
	  NULL,
	  N_("_To This Address"),
	  NULL,
	  NULL,  /* XXX Add a tooltip! */
	  NULL   /* Handled by EMailReader */ },

	{ "search-folder-sender",
	  NULL,
	  N_("_From This Address"),
	  NULL,
	  NULL,  /* XXX Add a tooltip! */
	  NULL   /* Handled by EMailReader */ },

	{ "send-reply",
	  NULL,
	  N_("Send _Reply To..."),
	  NULL,
	  N_("Send a reply message to this address"),
	  NULL   /* Handled by EMailReader */ },

	/*** Menus ***/

	{ "search-folder-menu",
	  "folder-saved-search",
	  N_("Create Search _Folder"),
	  NULL,
	  NULL,
	  NULL }
};

static GtkActionEntry image_entries[] = {

        { "image-save",
        GTK_STOCK_SAVE,
        N_("Save _Image..."),
        NULL,
        N_("Save the image to a file"),
        NULL    /* Handled by EMailReader */ },

};

static gboolean
mail_display_button_press_event (GtkWidget *widget,
				 GdkEventButton *event)
{
	WebKitHitTestResult *hit_test;
	WebKitHitTestResultContext context;
	gchar *image_src;
	gboolean visible;
	GtkAction *action;
	GList *extensions, *iter;
	EWebView *web_view = E_WEB_VIEW (widget);

	hit_test = webkit_web_view_get_hit_test_result (
			WEBKIT_WEB_VIEW (web_view), event);

	g_object_get (
		G_OBJECT (hit_test),
		"context", &context,
	        "image-uri", &image_src,
		NULL);

	if ((context & WEBKIT_HIT_TEST_RESULT_CONTEXT_IMAGE)) {
		visible = image_src && g_str_has_prefix (image_src, "cid:");
		if (!visible && image_src) {
			CamelStream *image_stream;

			image_stream = camel_data_cache_get (
					emd_global_http_cache, "http",
					image_src, NULL);

			visible = image_stream != NULL;

			if (image_stream)
				g_object_unref (image_stream);
		}

		if (image_src)
			g_free (image_src);

		action = e_web_view_get_action (web_view, "image-save");
		if (action)
			gtk_action_set_visible (action, visible);
	}

	extensions = e_extensible_list_extensions (
			E_EXTENSIBLE (web_view), E_TYPE_EXTENSION);
	for (iter = extensions; iter; iter = g_list_next (iter)) {
		EExtension *extension = iter->data;

		if (!E_IS_MAIL_DISPLAY_POPUP_EXTENSION (extension))
			continue;

		e_mail_display_popup_extension_update_actions (
			E_MAIL_DISPLAY_POPUP_EXTENSION (extension), hit_test);
	}
	g_list_free (extensions);

	g_object_unref (hit_test);

	/* Chain up to parent's button_press_event() method. */
	return GTK_WIDGET_CLASS (e_mail_display_parent_class)->button_press_event (widget, event);
}

static void
formatter_image_loading_policy_changed_cb (GObject *object,
                                           GParamSpec *pspec,
                                           gpointer user_data)
{
	EMailDisplay *display = user_data;
	EMailFormatter *formatter = E_MAIL_FORMATTER (object);
	EMailImageLoadingPolicy policy;

	policy = e_mail_formatter_get_image_loading_policy (formatter);
	if (policy == E_MAIL_IMAGE_LOADING_POLICY_ALWAYS) {
		e_mail_display_load_images (display);
	} else {
		e_mail_display_reload (display);
	}
}

static void
mail_display_update_formatter_colors (EMailDisplay *display)
{
	GtkStyle *style;
	GtkStateType state;

	if (!display->priv->formatter)
		return;

	style = gtk_widget_get_style (GTK_WIDGET (display));
	state = gtk_widget_get_state (GTK_WIDGET (display));
	e_mail_formatter_set_style (display->priv->formatter, style, state);
}

static void
mail_display_constructed (GObject *object)
{
	e_extensible_load_extensions (E_EXTENSIBLE (object));

	/* Chain up to parent's constructed() method. */
	G_OBJECT_CLASS (e_mail_display_parent_class)->constructed (object);
}

static void
mail_display_set_property (GObject *object,
                           guint property_id,
                           const GValue *value,
                           GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_PART_LIST:
			e_mail_display_set_parts_list (
				E_MAIL_DISPLAY (object),
				g_value_get_pointer (value));
			return;
		case PROP_MODE:
			e_mail_display_set_mode (
				E_MAIL_DISPLAY (object),
				g_value_get_int (value));
			return;
		case PROP_HEADERS_COLLAPSABLE:
			e_mail_display_set_headers_collapsable (
				E_MAIL_DISPLAY (object),
				g_value_get_boolean (value));
			return;
		case PROP_HEADERS_COLLAPSED:
			e_mail_display_set_headers_collapsed (
				E_MAIL_DISPLAY (object),
				g_value_get_boolean (value));
			return;
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_display_get_property (GObject *object,
                           guint property_id,
                           GValue *value,
                           GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_PART_LIST:
			g_value_set_pointer (
				value, e_mail_display_get_parts_list (
				E_MAIL_DISPLAY (object)));
			return;
		case PROP_MODE:
			g_value_set_int (
				value, e_mail_display_get_mode (
				E_MAIL_DISPLAY (object)));
			return;
		case PROP_HEADERS_COLLAPSABLE:
			g_value_set_boolean (
				value, e_mail_display_get_headers_collapsable (
				E_MAIL_DISPLAY (object)));
			return;
		case PROP_HEADERS_COLLAPSED:
			g_value_set_boolean (
				value, e_mail_display_get_headers_collapsed (
				E_MAIL_DISPLAY (object)));
			return;
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_display_dispose (GObject *object)
{
	EMailDisplayPrivate *priv;

	priv = E_MAIL_DISPLAY_GET_PRIVATE (object);

	if (priv->scheduled_reload > 0) {
		g_source_remove (priv->scheduled_reload);
		priv->scheduled_reload = 0;
	}

	if (priv->part_list) {
		g_object_unref (priv->part_list);
		priv->part_list = NULL;
	}

	if (priv->settings) {
		g_object_unref (priv->settings);
		priv->settings = NULL;
	}

	if (priv->widgets) {
		g_hash_table_destroy (priv->widgets);
		priv->widgets = NULL;
	}

	/* Chain up to parent's dispose() method. */
	G_OBJECT_CLASS (e_mail_display_parent_class)->dispose (object);
}

static void
mail_display_realize (GtkWidget *widget)
{
	/* Chain up to parent's realize() method. */
	GTK_WIDGET_CLASS (e_mail_display_parent_class)->realize (widget);

	mail_display_update_formatter_colors (E_MAIL_DISPLAY (widget));
}

static void
mail_display_style_set (GtkWidget *widget,
                        GtkStyle *previous_style)
{
	EMailDisplay *display = E_MAIL_DISPLAY (widget);

	mail_display_update_formatter_colors (display);

	/* Chain up to parent's style_set() method. */
	GTK_WIDGET_CLASS (e_mail_display_parent_class)->
		style_set (widget, previous_style);
}

static gboolean
mail_display_process_mailto (EWebView *web_view,
                             const gchar *mailto_uri,
                             gpointer user_data)
{
	g_return_val_if_fail (E_IS_WEB_VIEW (web_view), FALSE);
	g_return_val_if_fail (mailto_uri != NULL, FALSE);

	if (g_ascii_strncasecmp (mailto_uri, "mailto:", 7) == 0) {
		EShell *shell;
		EMailPartList *part_list;

		part_list = E_MAIL_DISPLAY (web_view)->priv->part_list;

		shell = e_shell_get_default ();
		em_utils_compose_new_message_with_mailto (
			shell, mailto_uri, part_list->folder);

		return TRUE;
	}

	return FALSE;
}

static gboolean
mail_display_link_clicked (WebKitWebView *web_view,
                           WebKitWebFrame *frame,
                           WebKitNetworkRequest *request,
                           WebKitWebNavigationAction *navigation_action,
                           WebKitWebPolicyDecision *policy_decision,
                           gpointer user_data)
{
	const gchar *uri = webkit_network_request_get_uri (request);

	if (g_str_has_prefix (uri, "file://")) {
		gchar *filename;
		filename = g_filename_from_uri (uri, NULL, NULL);

		if (g_file_test (filename, G_FILE_TEST_IS_DIR)) {
			webkit_web_policy_decision_ignore (policy_decision);
			webkit_network_request_set_uri (request, "about:blank");
			g_free (filename);
			return TRUE;
		}

		g_free (filename);
	}

	if (mail_display_process_mailto (E_WEB_VIEW (web_view), uri, NULL)) {
		/* do nothing, function handled the "mailto:" uri already */
		webkit_web_policy_decision_ignore (policy_decision);
		return TRUE;

	} else if (g_ascii_strncasecmp (uri, "thismessage:", 12) == 0) {
		/* ignore */ ;
		webkit_web_policy_decision_ignore (policy_decision);
		return TRUE;

	} else if (g_ascii_strncasecmp (uri, "cid:", 4) == 0) {
		/* ignore */ ;
		webkit_web_policy_decision_ignore (policy_decision);
		return TRUE;

	}

	/* Let webkit handle it */
	return FALSE;
}

static void
webkit_request_load_from_file (WebKitNetworkRequest *request,
                               const gchar *path)
{
	gchar *data = NULL;
	gsize length = 0;
	gboolean status;
	gchar *b64, *new_uri;
	gchar *ct;

	status = g_file_get_contents (path, &data, &length, NULL);
	if (!status)
		return;

	b64 = g_base64_encode ((guchar *) data, length);
	ct = g_content_type_guess (path, NULL, 0, NULL);

	new_uri =  g_strdup_printf ("data:%s;base64,%s", ct, b64);
	webkit_network_request_set_uri (request, new_uri);

	g_free (b64);
	g_free (new_uri);
	g_free (ct);
	g_free (data);
}

static void
mail_display_resource_requested (WebKitWebView *web_view,
                                 WebKitWebFrame *frame,
                                 WebKitWebResource *resource,
                                 WebKitNetworkRequest *request,
                                 WebKitNetworkResponse *response,
                                 gpointer user_data)
{
	EMailDisplay *display = E_MAIL_DISPLAY (web_view);
	EMailPartList *part_list;
	const gchar *uri = webkit_network_request_get_uri (request);

	part_list = display->priv->part_list;
	if (!part_list) {
		return;
	}

        /* Redirect cid:part_id to mail://mail_id/cid:part_id */
	if (g_str_has_prefix (uri, "cid:")) {

		/* Always write raw content of CID object */
		gchar *new_uri = e_mail_part_build_uri (
			part_list->folder, part_list->message_uid,
			"part_id", G_TYPE_STRING, uri,
			"mode", G_TYPE_INT, E_MAIL_FORMATTER_MODE_RAW, NULL);

		webkit_network_request_set_uri (request, new_uri);

		g_free (new_uri);

        /* WebKit won't allow to load a local file when displaing "remote" mail://,
	   protocol, so we need to handle this manually */
	} else if (g_str_has_prefix (uri, "file:")) {
		gchar *path;

		path = g_filename_from_uri (uri, NULL, NULL);
		if (!path)
			return;

		webkit_request_load_from_file (request, path);

		g_free (path);

        /* Redirect http(s) request to evo-http(s) protocol. See EMailRequest for
         * further details about this. */
	} else if (g_str_has_prefix (uri, "http:") || g_str_has_prefix (uri, "https")) {

		gchar *new_uri, *mail_uri, *enc;
		SoupURI *soup_uri;
		GHashTable *query;
		gchar *uri_md5;
		CamelStream *stream;
		EMailImageLoadingPolicy image_policy;

                /* Open Evolution's cache */
		uri_md5 = g_compute_checksum_for_string (G_CHECKSUM_MD5, uri, -1);
		stream = camel_data_cache_get (
				emd_global_http_cache, "http", uri_md5, NULL);
		g_free (uri_md5);

                /* If the URI is not cached and we are not allowed to load it
                 * then redirect to invalid URI, so that webkit would display
                 * a native placeholder for it. */
		image_policy = e_mail_formatter_get_image_loading_policy (
					display->priv->formatter);
		if (!stream && !display->priv->force_image_load &&
		    (image_policy == E_MAIL_IMAGE_LOADING_POLICY_NEVER)) {
			webkit_network_request_set_uri (request, "about:blank");
			return;
		}

		new_uri = g_strconcat ("evo-", uri, NULL);
		mail_uri = e_mail_part_build_uri (part_list->folder,
				part_list->message_uid, NULL, NULL);

		soup_uri = soup_uri_new (new_uri);
		if (soup_uri->query) {
			query = soup_form_decode (soup_uri->query);
		} else {
			query = g_hash_table_new_full (g_str_hash, g_str_equal,
						       g_free, g_free);
		}
		enc = soup_uri_encode (mail_uri, NULL);
		g_hash_table_insert (query, g_strdup ("__evo-mail"), enc);

		if (display->priv->force_image_load) {
			g_hash_table_insert (query,
				g_strdup ("__evo-load-images"),
					     g_strdup ("true"));
		}

		g_free (mail_uri);

		soup_uri_set_query_from_form (soup_uri, query);
		g_free (new_uri);

		new_uri = soup_uri_to_string (soup_uri, FALSE);
		webkit_network_request_set_uri (request, new_uri);

		g_free (new_uri);
		soup_uri_free (soup_uri);
		g_hash_table_unref (query);
	}
}

static WebKitDOMElement *
find_element_by_id (WebKitDOMDocument *document,
                    const gchar *id)
{
	WebKitDOMNodeList *frames;
	WebKitDOMElement *element;
	gulong i, length;

	if (!WEBKIT_DOM_IS_DOCUMENT (document))
		return NULL;

        /* Try to look up the element in this DOM document */
	element = webkit_dom_document_get_element_by_id (document, id);
	if (element)
		return element;

        /* If the element is not here then recursively scan all frames */
	frames = webkit_dom_document_get_elements_by_tag_name(document, "iframe");
	length = webkit_dom_node_list_get_length (frames);
	for (i = 0; i < length; i++) {

		WebKitDOMHTMLIFrameElement *iframe =
			WEBKIT_DOM_HTML_IFRAME_ELEMENT (
				webkit_dom_node_list_item (frames, i));

		WebKitDOMDocument *frame_doc =
			webkit_dom_html_iframe_element_get_content_document (iframe);

		WebKitDOMElement *el =
			find_element_by_id (frame_doc, id);

		if (el)
			return el;
	}

	return NULL;
}

static void
mail_display_plugin_widget_resize (GObject *object,
                                   gpointer dummy,
                                   EMailDisplay *display)
{
	GtkWidget *widget;
	WebKitDOMElement *parent_element;
	gchar *dim;
	gint height;

	widget = GTK_WIDGET (object);
	parent_element = g_object_get_data (object, "parent_element");

	if (!parent_element || !WEBKIT_DOM_IS_ELEMENT (parent_element)) {
		d(printf("%s: %s does not have (valid) parent element!\n",
			G_STRFUNC, (gchar *) g_object_get_data (object, "uri")));
		return;
	}

	/* For attachment bar, we need to ask for height it's parent,
	 * GtkBox, because EAttachmentBar itself lies about it's real height. */
	if (E_IS_ATTACHMENT_BAR (widget)) {
		widget = gtk_widget_get_parent (widget);
	}

	gtk_widget_get_preferred_height (widget, &height, NULL);

        /* Int -> Str */
	dim = g_strdup_printf ("%d", height);

        /* Set height of the containment <object> to match height of the
         * GtkWidget it contains */
	webkit_dom_html_object_element_set_height (
		WEBKIT_DOM_HTML_OBJECT_ELEMENT (parent_element), dim);
	g_free (dim);
}

static void
mail_display_plugin_widget_realize_cb (GtkWidget *widget,
                                       gpointer user_data)
{
	WebKitDOMHTMLElement *el;

	if (GTK_IS_BOX (widget)) {
		GList *children;

		children = gtk_container_get_children (GTK_CONTAINER (widget));
		if (children && children->data &&
		    E_IS_ATTACHMENT_BAR (children->data)) {
			widget = children->data;
		}

		g_list_free (children);
	}

	/* First check if we are actually supposed to be visible */
	el = g_object_get_data (G_OBJECT (widget), "parent_element");
	if (!el || !WEBKIT_DOM_IS_HTML_ELEMENT (el)) {
		g_warning ("UAAAAA");
	} else {
		if (webkit_dom_html_element_get_hidden (el)) {
			gtk_widget_hide (widget);
			return;
		}
	}

        /* Initial resize of the <object> element when the widget
         * is displayed for the first time. */
	mail_display_plugin_widget_resize (G_OBJECT (widget), NULL, user_data);
}

static void
plugin_widget_set_parent_element (GtkWidget *widget,
                                  EMailDisplay *display)
{
	const gchar *uri;
	WebKitDOMDocument *document;
	WebKitDOMElement *element;

	uri = g_object_get_data (G_OBJECT (widget), "uri");
	if (!uri || !*uri)
		return;

	document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (display));
	element = find_element_by_id (document, uri);

	if (!element || !WEBKIT_DOM_IS_ELEMENT (element)) {
		g_warning ("Failed to find parent <object> for '%s' - no ID set?", uri);
		return;
	}

        /* Assign the WebKitDOMElement to "parent_element" data of the GtkWidget
         * and the GtkWidget to "widget" data of the DOM Element */
	g_object_set_data (G_OBJECT (widget), "parent_element", element);
	g_object_set_data (G_OBJECT (element), "widget", widget);

	g_object_bind_property (
		element, "hidden",
		widget, "visible",
		G_BINDING_SYNC_CREATE |
		G_BINDING_INVERT_BOOLEAN);
}

static void
toggle_widget_visibility (EAttachmentButton *button,
                          EMailDisplay *display,
                          WebKitDOMElement *element)
{
	gchar *id;
	GtkWidget *widget;

	id = webkit_dom_html_element_get_id (WEBKIT_DOM_HTML_ELEMENT (element));
	if (!id || !*id) {
		return;
	}

	if (!display->priv->widgets) {
		g_free (id);
		return;
	}

	widget = g_hash_table_lookup (display->priv->widgets, id);
	g_free (id);
	if (!widget) {
		return;
	}

	/* If the widget encapsulates EAttachmentBar then check, whether
	 * the attachment bar is not empty. We want to display it only
	 * when there's at least one attachment */
	if (GTK_IS_BOX (widget)) {
		GList *children;

		children = gtk_container_get_children (GTK_CONTAINER (widget));
		if (children && children->data && E_IS_ATTACHMENT_BAR (children->data)) {
			EAttachmentStore *store;

			store = e_attachment_bar_get_store (
					E_ATTACHMENT_BAR (children->data));

			g_list_free (children);

			/* Don't allow to display such attachment bar,
			 * but always allow to hide it */
			if (e_attachment_button_get_expanded (button) &&
			    (e_attachment_store_get_num_attachments (store) == 0)) {
				return;
			}
		}
	}

	webkit_dom_html_element_set_hidden (
		WEBKIT_DOM_HTML_ELEMENT (element),
		!e_attachment_button_get_expanded (button));

	if (e_attachment_button_get_expanded (button)) {
		gtk_widget_show (widget);
	} else {
		gtk_widget_hide (widget);
	}
}

/**
 * @button: An #EAttachmentButton
 * @iframe: An iframe element containing document with an attachment
 * 	    represented by the @button
 */
static void
bind_iframe_content_visibility (WebKitDOMElement *iframe,
                                EMailDisplay *display,
                                EAttachmentButton *button)
{
	WebKitDOMDocument *document;
	WebKitDOMNodeList *nodes;
	gulong i, length;

	if (!iframe || !WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT (iframe))
		return;

	document = webkit_dom_html_iframe_element_get_content_document (
			WEBKIT_DOM_HTML_IFRAME_ELEMENT (iframe));
	if (!WEBKIT_DOM_IS_DOCUMENT (document))
		return;

	nodes = webkit_dom_document_get_elements_by_tag_name (document, "object");
	length = webkit_dom_node_list_get_length (nodes);

	d ({
		gchar *name = webkit_dom_html_iframe_element_get_name (
				WEBKIT_DOM_HTML_IFRAME_ELEMENT (iframe));
		printf("Found %ld objects within iframe %s\n", length, name);
		g_free (name);
	});

        /* Iterate through all <object>s and bind visibility of their widget
         * with expanded-state of related attachment button */
	for (i = 0; i < length; i++) {

		WebKitDOMNode *node = webkit_dom_node_list_item (nodes, i);

		/* Initial sync */
		toggle_widget_visibility (button, display, WEBKIT_DOM_ELEMENT (node));
	}
}

static void
attachment_button_expanded (GObject *object,
                            GParamSpec *pspec,
                            gpointer user_data)
{
	EAttachmentButton *button = E_ATTACHMENT_BUTTON (object);
	EMailDisplay *display = user_data;
	WebKitDOMDocument *document;
	WebKitDOMElement *element;
	WebKitDOMCSSStyleDeclaration *css;
	gboolean expanded;
	gchar *id;

	d(printf("Attachment button %s has been %s!\n",
		(gchar *) g_object_get_data (object, "uri"),
		(e_attachment_button_get_expanded (button) ? "expanded" : "collapsed")));

	expanded = e_attachment_button_get_expanded (button) &&
			gtk_widget_get_visible (GTK_WIDGET (button));

	document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (display));
	element = find_element_by_id (document, g_object_get_data (object, "attachment_id"));

	if (!WEBKIT_DOM_IS_ELEMENT (element)) {
		d(printf("%s: Content <div> of attachment %s does not exist!!\n",
			G_STRFUNC, (gchar *) g_object_get_data (object, "uri")));
		return;
	}

        /* Show or hide the DIV which contains the attachment (iframe, image...) */
	css = webkit_dom_element_get_style (element);
	webkit_dom_css_style_declaration_set_property (
		css, "display", expanded ? "block" : "none", "", NULL);

	id = g_strconcat (g_object_get_data (object, "attachment_id"), ".iframe", NULL);
	element = find_element_by_id (document, id);
	g_free (id);

	if (!WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT (element)) {
		d(printf("%s: No <iframe> found\n",
			 (gchar *) g_object_get_data (object, "attachment_id")));
		return;
	}
	bind_iframe_content_visibility (element, display, button);
}

static void
mail_display_attachment_count_changed (EAttachmentStore *store,
                                       GParamSpec *pspec,
                                       GtkWidget *box)
{
	WebKitDOMHTMLElement *element;
	GList *children;

	children = gtk_container_get_children (GTK_CONTAINER (box));
	g_return_if_fail (children  && children->data);

	element = g_object_get_data (children->data, "parent_element");
	g_list_free (children);

	g_return_if_fail (WEBKIT_DOM_IS_HTML_ELEMENT (element));

	if (e_attachment_store_get_num_attachments (store) == 0) {
		gtk_widget_hide (box);
		webkit_dom_html_element_set_hidden (element, TRUE);
	} else {
		gtk_widget_show (box);
		webkit_dom_html_element_set_hidden (element, FALSE);
	}
}

static GtkWidget *
mail_display_plugin_widget_requested (WebKitWebView *web_view,
                                      gchar *mime_type,
                                      gchar *uri,
                                      GHashTable *param,
                                      gpointer user_data)
{
	EMailDisplay *display;
	EMailExtensionRegistry *reg;
	EMailFormatterExtension *extension;
	GQueue *extensions;
	GList *iter;
	EMailPart *part;
	GtkWidget *widget;
	gchar *part_id, *type, *object_uri;

	part_id = g_hash_table_lookup (param, "data");
	if (!part_id || !g_str_has_prefix (uri, "mail://"))
		return NULL;

	type = g_hash_table_lookup (param, "type");
	if (!type)
		return NULL;

	display = E_MAIL_DISPLAY (web_view);

	if ((widget = g_hash_table_lookup (display->priv->widgets, part_id)) != NULL) {
		d(printf("Handeled %s widget request from cache\n", part_id));
		return widget;
	}

	/* Findt EMailPart representing requested widget */
	part = e_mail_part_list_find_part (display->priv->part_list, part_id);
	if (!part) {
		return NULL;
	}

	reg = e_mail_formatter_get_extension_registry (display->priv->formatter);
	extensions = e_mail_extension_registry_get_for_mime_type (reg, type);
	if (!extensions)
		return NULL;

	extension = NULL;
	for (iter = g_queue_peek_head_link (extensions); iter; iter = iter->next) {

		extension = iter->data;
		if (!extension)
			continue;

		if (e_mail_formatter_extension_has_widget (extension))
			break;
	}

	if (!extension)
		return NULL;

	/* Get the widget from formatter */
	widget = e_mail_formatter_extension_get_widget (
			extension, display->priv->part_list, part, param);
	d(printf("Created widget %s (%p) for part %s\n",
			G_OBJECT_TYPE_NAME (widget), widget, part_id));

	/* Should not happen! WebKit will display an ugly 'Plug-in not available'
	 * placeholder instead of hiding the <object> element */
	if (!widget)
		return NULL;

	/* Attachment button has URI different then the actual PURI because
	 * that URI identifies the attachment itself */
	if (E_IS_ATTACHMENT_BUTTON (widget)) {
		EMailPartAttachment *empa = (EMailPartAttachment *) part;
		gchar *attachment_part_id;

		if (empa->attachment_view_part_id)
			attachment_part_id = empa->attachment_view_part_id;
		else
			attachment_part_id = part_id;

		object_uri = g_strconcat (attachment_part_id, ".attachment_button", NULL);
		g_object_set_data_full (G_OBJECT (widget), "attachment_id",
			g_strdup (attachment_part_id), (GDestroyNotify) g_free);
	} else {
		object_uri = g_strdup (part_id);
	}

	/* Store the uri as data of the widget */
	g_object_set_data_full (G_OBJECT (widget), "uri",
		object_uri, (GDestroyNotify) g_free);

	/* Set pointer to the <object> element as GObject data "parent_element"
	 * and set pointer to the widget as GObject data "widget" to the <object>
	 * element */
	plugin_widget_set_parent_element (widget, display);

        /* Resizing a GtkWidget requires changing size of parent
         * <object> HTML element in DOM. */
	g_signal_connect (widget, "realize",
			  G_CALLBACK (mail_display_plugin_widget_realize_cb), display);
	g_signal_connect (widget, "size-allocate",
			  G_CALLBACK (mail_display_plugin_widget_resize), display);

	if (E_IS_ATTACHMENT_BAR (widget)) {
		GtkWidget *box = NULL;
		EAttachmentStore *store;

                /* Only when packed in box (grid does not work),
		 * EAttachmentBar reports correct height */
		box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
		gtk_box_pack_start (GTK_BOX (box), widget, TRUE, TRUE, 0);

                /* When EAttachmentBar is expanded/collapsed it does not
                 * emit size-allocate signal despite it changes it's height. */
		g_signal_connect (widget, "notify::expanded",
			G_CALLBACK (mail_display_plugin_widget_resize), display);
		g_signal_connect (widget, "notify::active-view",
			G_CALLBACK (mail_display_plugin_widget_resize), display);

		/* Always hide an attachment bar without attachments */
		store = e_attachment_bar_get_store (E_ATTACHMENT_BAR (widget));
		g_signal_connect (store, "notify::num-attachments",
			G_CALLBACK (mail_display_attachment_count_changed), box);

		gtk_widget_show (widget);
		gtk_widget_show (box);

		/* Initial sync */
		mail_display_attachment_count_changed (store, NULL, box);

		widget = box;

	} else if (E_IS_ATTACHMENT_BUTTON (widget)) {

                /* Bind visibility of DOM element containing related
                 * attachment with 'expanded' property of this
                 * attachment button. */
		WebKitDOMElement *attachment;
		WebKitDOMDocument *document;
		EMailPartAttachment *empa = (EMailPartAttachment *) part;
		gchar *attachment_part_id;

		if (empa->attachment_view_part_id)
			attachment_part_id = empa->attachment_view_part_id;
		else
			attachment_part_id = part_id;

		/* Find attachment-wrapper div which contains the content of the
		 * attachment (iframe) */
		document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (display));
		attachment = find_element_by_id (document, attachment_part_id);

		/* None found? Attachment cannot be expanded */
		if (!attachment) {
			e_attachment_button_set_expandable (
				E_ATTACHMENT_BUTTON (widget), FALSE);
		} else {
			const CamelContentDisposition *disposition;

			e_attachment_button_set_expandable (
				E_ATTACHMENT_BUTTON (widget), TRUE);

			/* Show/hide the attachment when the EAttachmentButton
 *                       * is expanded/collapsed or shown/hidden */
			g_signal_connect (widget, "notify::expanded",
				G_CALLBACK (attachment_button_expanded), display);
			g_signal_connect (widget, "notify::visible",
				G_CALLBACK (attachment_button_expanded), display);

                        /* Automatically expand attachments that have inline
			 * disposition or the EMailParts have specific force_inline
			 * flag set */
			disposition =
				camel_mime_part_get_content_disposition (part->part);
			if (!part->force_collapse &&
			    (part->force_inline ||
			    (g_strcmp0 (empa->snoop_mime_type, "message/rfc822") == 0) ||
			     (disposition && disposition->disposition &&
				g_ascii_strncasecmp (
				     disposition->disposition, "inline", 6) == 0))) {

				e_attachment_button_set_expanded (
					E_ATTACHMENT_BUTTON (widget), TRUE);
			} else {
				e_attachment_button_set_expanded (
					E_ATTACHMENT_BUTTON (widget), FALSE);
				attachment_button_expanded (
					G_OBJECT (widget), NULL, display);
			}
		}
	}

	g_hash_table_insert (
		display->priv->widgets,
		g_strdup (object_uri), g_object_ref (widget));

	return widget;
}

static void
toggle_headers_visibility (WebKitDOMElement *button,
                           WebKitDOMEvent *event,
                           WebKitWebView *web_view)
{
	WebKitDOMDocument *document;
	WebKitDOMElement *short_headers, *full_headers;
	WebKitDOMCSSStyleDeclaration *css_short, *css_full;
	gboolean expanded;
	const gchar *path;
	gchar *css_value;

	document = webkit_web_view_get_dom_document (web_view);

	short_headers = webkit_dom_document_get_element_by_id (
		document, "__evo-short-headers");
	if (!short_headers)
		return;

	css_short = webkit_dom_element_get_style (short_headers);

	full_headers = webkit_dom_document_get_element_by_id (
		document, "__evo-full-headers");
	if (!full_headers)
		return;

	css_full = webkit_dom_element_get_style (full_headers);
	css_value = webkit_dom_css_style_declaration_get_property_value (
			css_full, "display");
	expanded = (g_strcmp0 (css_value, "block") == 0);
	g_free (css_value);

	webkit_dom_css_style_declaration_set_property (css_full, "display",
		expanded ? "none" : "block", "", NULL);
	webkit_dom_css_style_declaration_set_property (css_short, "display",
		expanded ? "block" : "none", "", NULL);

	if (expanded)
		path = "evo-file://" EVOLUTION_IMAGESDIR "/plus.png";
	else
		path = "evo-file://" EVOLUTION_IMAGESDIR "/minus.png";

	webkit_dom_html_image_element_set_src (
		WEBKIT_DOM_HTML_IMAGE_ELEMENT (button), path);

	e_mail_display_set_headers_collapsed (E_MAIL_DISPLAY (web_view), expanded);

	d(printf("Headers %s!\n", expanded ? "collapsed" : "expanded"));
}

static const gchar* addresses[] = { "to", "cc", "bcc" };

static void
toggle_address_visibility (WebKitDOMElement *button,
                           WebKitDOMEvent *event,
                           const gchar *address)
{
	WebKitDOMElement *full_addr, *ellipsis;
	WebKitDOMCSSStyleDeclaration *css_full, *css_ellipsis;
	WebKitDOMDocument *document;
	gchar *id;
	const gchar *path;
	gboolean expanded;

	document = webkit_dom_node_get_owner_document (WEBKIT_DOM_NODE (button));

	id = g_strconcat ("__evo-moreaddr-", address, NULL);
	full_addr = webkit_dom_document_get_element_by_id (document, id);
	g_free (id);

	if (!full_addr)
		return;

	css_full = webkit_dom_element_get_style (full_addr);

	id = g_strconcat ("__evo-moreaddr-ellipsis-", address, NULL);
	ellipsis = webkit_dom_document_get_element_by_id (document, id);
	g_free (id);

	if (!ellipsis)
		return;

	css_ellipsis = webkit_dom_element_get_style (ellipsis);

	expanded = (g_strcmp0 (
		webkit_dom_css_style_declaration_get_property_value (
		css_full, "display"), "inline") == 0);

	webkit_dom_css_style_declaration_set_property (
		css_full, "display", (expanded ? "none" : "inline"), "", NULL);
	webkit_dom_css_style_declaration_set_property (
		css_ellipsis, "display", (expanded ? "inline" : "none"), "", NULL);

	if (expanded) {
		path = "evo-file://" EVOLUTION_IMAGESDIR "/plus.png";
	} else {
		path = "evo-file://" EVOLUTION_IMAGESDIR "/minus.png";
	}

	if (!WEBKIT_DOM_IS_HTML_IMAGE_ELEMENT (button)) {
		id = g_strconcat ("__evo-moreaddr-img-", address, NULL);
		button = webkit_dom_document_get_element_by_id (document, id);
		g_free (id);

		if (!button)
			return;
	}

	webkit_dom_html_image_element_set_src (
		WEBKIT_DOM_HTML_IMAGE_ELEMENT (button), path);

}

static void
setup_DOM_bindings (GObject *object,
                    GParamSpec *pspec,
                    gpointer user_data)
{
	WebKitWebView *web_view;
	WebKitWebFrame *frame;
	WebKitLoadStatus load_status;
	WebKitDOMDocument *document;
	WebKitDOMElement *button;
	gint i = 0;

	frame = WEBKIT_WEB_FRAME (object);
	load_status = webkit_web_frame_get_load_status (frame);
	if (load_status != WEBKIT_LOAD_FINISHED)
		return;

	web_view = webkit_web_frame_get_web_view (frame);
	document = webkit_web_view_get_dom_document (web_view);

	button = webkit_dom_document_get_element_by_id (
			document, "__evo-collapse-headers-img");
	if (!button)
		return;

	d(printf("Conntecting to __evo-collapsable-headers-img::click event\n"));

	webkit_dom_event_target_add_event_listener (
		WEBKIT_DOM_EVENT_TARGET (button), "click",
		G_CALLBACK (toggle_headers_visibility), FALSE, web_view);

	for (i = 0; i < 3; i++) {
		gchar *id;
		id = g_strconcat ("__evo-moreaddr-img-", addresses[i], NULL);
		button = webkit_dom_document_get_element_by_id (document, id);
		g_free (id);

		if (!button)
			continue;

		webkit_dom_event_target_add_event_listener (
			WEBKIT_DOM_EVENT_TARGET (button), "click",
			G_CALLBACK (toggle_address_visibility), FALSE,
			(gpointer) addresses[i]);

		id = g_strconcat ("__evo-moreaddr-ellipsis-", addresses[i], NULL);
		button = webkit_dom_document_get_element_by_id (document, id);
		g_free (id);

		if (!button)
			continue;

		webkit_dom_event_target_add_event_listener (
			WEBKIT_DOM_EVENT_TARGET (button), "click",
			G_CALLBACK (toggle_address_visibility), FALSE,
			(gpointer) addresses[i]);
	}
}

static void
mail_parts_bind_dom (GObject *object,
                     GParamSpec *pspec,
                     gpointer user_data)
{
	WebKitWebFrame *frame;
	WebKitLoadStatus load_status;
	WebKitWebView *web_view;
	WebKitDOMDocument *document;
	EMailDisplay *display;
	GSList *iter;
	const gchar *frame_name;

	frame = WEBKIT_WEB_FRAME (object);
	load_status = webkit_web_frame_get_load_status (frame);

	if (load_status != WEBKIT_LOAD_FINISHED)
		return;

	web_view = webkit_web_frame_get_web_view (frame);
	display = E_MAIL_DISPLAY (web_view);
	if (display->priv->part_list == NULL)
		return;

	frame_name = webkit_web_frame_get_name (frame);
	if (!frame_name || !*frame_name)
		frame_name = ".message.headers";

	for (iter = display->priv->part_list->list; iter; iter = iter->next) {

		EMailPart *part = iter->data;
		if (!part)
			continue;

		if (g_strcmp0 (part->id, frame_name) == 0)
			break;
	}

	document = webkit_web_view_get_dom_document (web_view);
	while (iter) {

		EMailPart *part = iter->data;
		if (!part) {
			iter = iter->next;
			continue;
		}

		/* Iterate only the parts rendered in the frame and all it's subparts */
		if (!g_str_has_prefix (part->id, frame_name))
			break;

		if (part->bind_func) {
			WebKitDOMElement *el = find_element_by_id (document, part->id);
			if (el) {
				d(printf("/*bind_func*/ for %s\n", part->id));
				part->bind_func (part, el);
			}
		}

		iter = iter->next;
	}
}

static void
mail_display_frame_created (WebKitWebView *web_view,
                            WebKitWebFrame *frame,
                            gpointer user_data)
{
	d(printf("Frame %s created!\n", webkit_web_frame_get_name (frame)));

	/* Call bind_func of all parts written in this frame */
	g_signal_connect (frame, "notify::load-status",
		G_CALLBACK (mail_parts_bind_dom), NULL);
}

static void
mail_display_uri_changed (EMailDisplay *display,
                          GParamSpec *pspec,
                          gpointer dummy)
{
	d(printf("EMailDisplay URI changed, recreating widgets hashtable\n"));

	if (display->priv->widgets)
		g_hash_table_destroy (display->priv->widgets);

	display->priv->widgets = g_hash_table_new_full (
					g_str_hash, g_str_equal,
					(GDestroyNotify) g_free,
					(GDestroyNotify) g_object_unref);
}

static void
mail_display_set_fonts (EWebView *web_view,
                        PangoFontDescription **monospace,
                        PangoFontDescription **variable)
{
	EMailDisplay *display = E_MAIL_DISPLAY (web_view);
	gboolean use_custom_font;
	gchar *monospace_font, *variable_font;

	use_custom_font = g_settings_get_boolean (display->priv->settings, "use-custom-font");
	if (!use_custom_font) {
		*monospace = NULL;
		*variable = NULL;
		return;
	}

	monospace_font = g_settings_get_string (
				display->priv->settings,
				"monospace-font");
	variable_font = g_settings_get_string (
				display->priv->settings,
				"variable-width-font");

	*monospace = monospace_font ? pango_font_description_from_string (monospace_font) : NULL;
	*variable = variable_font ? pango_font_description_from_string (variable_font) : NULL;

	if (monospace_font)
		g_free (monospace_font);
	if (variable_font)
		g_free (variable_font);
}

static void
e_mail_display_class_init (EMailDisplayClass *class)
{
	GObjectClass *object_class;
	EWebViewClass *web_view_class;
	GtkWidgetClass *widget_class;

	g_type_class_add_private (class, sizeof (EMailDisplayPrivate));

	object_class = G_OBJECT_CLASS (class);
	object_class->constructed = mail_display_constructed;
	object_class->set_property = mail_display_set_property;
	object_class->get_property = mail_display_get_property;
	object_class->dispose = mail_display_dispose;

	web_view_class = E_WEB_VIEW_CLASS (class);
	web_view_class->set_fonts = mail_display_set_fonts;

	widget_class = GTK_WIDGET_CLASS (class);
	widget_class->realize = mail_display_realize;
	widget_class->style_set = mail_display_style_set;
	widget_class->button_press_event = mail_display_button_press_event;

	g_object_class_install_property (
		object_class,
		PROP_PART_LIST,
		g_param_spec_pointer (
			"part-list",
			"Part List",
			NULL,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_MODE,
		g_param_spec_int (
			"mode",
			"Display Mode",
			NULL,
			E_MAIL_FORMATTER_MODE_INVALID,
			G_MAXINT,
			E_MAIL_FORMATTER_MODE_NORMAL,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_HEADERS_COLLAPSABLE,
		g_param_spec_boolean (
			"headers-collapsable",
			"Headers Collapsable",
			NULL,
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_HEADERS_COLLAPSED,
		g_param_spec_boolean (
			"headers-collapsed",
			"Headers Collapsed",
			NULL,
			FALSE,
			G_PARAM_READWRITE));
}

static void
e_mail_display_init (EMailDisplay *display)
{
	GtkUIManager *ui_manager;
	const gchar *user_cache_dir;
	WebKitWebSettings *settings;
	WebKitWebFrame *main_frame;
	GtkActionGroup *actions;

	display->priv = E_MAIL_DISPLAY_GET_PRIVATE (display);

	/* Set invalid mode so that MODE property initialization is run
	 * completely (see e_mail_display_set_mode) */
	display->priv->mode = E_MAIL_FORMATTER_MODE_INVALID;
	e_mail_display_set_mode (display, E_MAIL_FORMATTER_MODE_NORMAL);
	display->priv->force_image_load = FALSE;
	display->priv->scheduled_reload = 0;

	webkit_web_view_set_full_content_zoom (WEBKIT_WEB_VIEW (display), TRUE);

	settings = webkit_web_view_get_settings (WEBKIT_WEB_VIEW (display));
	g_object_set (settings, "enable-frame-flattening", TRUE, NULL);

	g_signal_connect (display, "navigation-policy-decision-requested",
			  G_CALLBACK (mail_display_link_clicked), NULL);
	g_signal_connect (display, "resource-request-starting",
			  G_CALLBACK (mail_display_resource_requested), NULL);
	g_signal_connect (display, "process-mailto",
			  G_CALLBACK (mail_display_process_mailto), NULL);
	g_signal_connect (display, "create-plugin-widget",
			  G_CALLBACK (mail_display_plugin_widget_requested), NULL);
	g_signal_connect (display, "frame-created",
			  G_CALLBACK (mail_display_frame_created), NULL);
	g_signal_connect (display, "notify::uri",
			  G_CALLBACK (mail_display_uri_changed), NULL);

	display->priv->settings = g_settings_new ("org.gnome.evolution.mail");
	g_signal_connect_swapped (
		display->priv->settings , "changed::monospace-font",
		G_CALLBACK (e_web_view_update_fonts), display);
	g_signal_connect_swapped (
		display->priv->settings , "changed::variable-width-font",
		G_CALLBACK (e_web_view_update_fonts), display);
	g_signal_connect_swapped (
		display->priv->settings , "changed::use-custom-font",
		G_CALLBACK (e_web_view_update_fonts), display);

	e_web_view_update_fonts (E_WEB_VIEW (display));

	main_frame = webkit_web_view_get_main_frame (WEBKIT_WEB_VIEW (display));
	g_signal_connect (main_frame, "notify::load-status",
		G_CALLBACK (setup_DOM_bindings), NULL);
	main_frame = webkit_web_view_get_main_frame (WEBKIT_WEB_VIEW (display));
	g_signal_connect (main_frame, "notify::load-status",
			  G_CALLBACK (mail_parts_bind_dom), NULL);

	actions = e_web_view_get_action_group (E_WEB_VIEW (display), "mailto");
	gtk_action_group_add_actions (
		actions, mailto_entries, G_N_ELEMENTS (mailto_entries), display);
	ui_manager = e_web_view_get_ui_manager (E_WEB_VIEW (display));
	gtk_ui_manager_add_ui_from_string (ui_manager, ui, -1, NULL);

	actions = e_web_view_get_action_group (E_WEB_VIEW (display), "image");
	gtk_action_group_add_actions (
		actions, image_entries, G_N_ELEMENTS (image_entries), display);
	gtk_ui_manager_add_ui_from_string (ui_manager, image_ui, -1, NULL);

	e_web_view_install_request_handler (E_WEB_VIEW (display), E_TYPE_MAIL_REQUEST);
	e_web_view_install_request_handler (E_WEB_VIEW (display), E_TYPE_HTTP_REQUEST);
	e_web_view_install_request_handler (E_WEB_VIEW (display), E_TYPE_FILE_REQUEST);
	e_web_view_install_request_handler (E_WEB_VIEW (display), E_TYPE_STOCK_REQUEST);

	/* cache expiry - 2 hour access, 1 day max */
	user_cache_dir = e_get_user_cache_dir ();
	emd_global_http_cache = camel_data_cache_new (user_cache_dir, NULL);
	if (emd_global_http_cache) {
		camel_data_cache_set_expire_age (emd_global_http_cache, 24 * 60 * 60);
		camel_data_cache_set_expire_access (emd_global_http_cache, 2 * 60 * 60);
	}
}

EMailFormatterMode
e_mail_display_get_mode (EMailDisplay *display)
{
	g_return_val_if_fail (E_IS_MAIL_DISPLAY (display),
			E_MAIL_FORMATTER_MODE_NORMAL);

	return display->priv->mode;
}

void
e_mail_display_set_mode (EMailDisplay *display,
                         EMailFormatterMode mode)
{
	EMailFormatter *formatter;
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	if (display->priv->mode == mode)
		return;

	display->priv->mode = mode;

	if (display->priv->mode == E_MAIL_FORMATTER_MODE_PRINTING) {
		formatter = e_mail_formatter_print_new ();
	} else {
		formatter = e_mail_formatter_new ();
	}

	g_clear_object (&display->priv->formatter);
	display->priv->formatter = formatter;
	mail_display_update_formatter_colors (display);

	g_signal_connect (formatter, "notify::image-loading-policy",
		G_CALLBACK (formatter_image_loading_policy_changed_cb), display);

	g_object_connect (formatter,
		"swapped-signal::notify::charset",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::image-loading-policy",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::mark-citations",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::only-local-photos",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::show-sender-photo",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::show-real-date",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::animate-images",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::text-color",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::body-color",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::citation-color",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::content-color",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::frame-color",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::notify::header-color",
			G_CALLBACK (e_mail_display_reload), display,
		"swapped-signal::need-redraw",
			G_CALLBACK (e_mail_display_reload), display,
		NULL);

	e_mail_display_reload (display);

	g_object_notify (G_OBJECT (display), "mode");
}

EMailPartList *
e_mail_display_get_parts_list (EMailDisplay *display)
{
	g_return_val_if_fail (E_IS_MAIL_DISPLAY (display), NULL);

	return display->priv->part_list;
}

void
e_mail_display_set_parts_list (EMailDisplay *display,
                               EMailPartList *part_list)
{
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	if (display->priv->part_list == part_list)
		return;

	if (part_list) {
		g_return_if_fail (E_IS_MAIL_PART_LIST (part_list));
		g_object_ref (part_list);
	}

	if (display->priv->part_list)
		g_object_unref (display->priv->part_list);

	display->priv->part_list = part_list;

	g_object_notify (G_OBJECT (display), "part-list");
}

gboolean
e_mail_display_get_headers_collapsable (EMailDisplay *display)
{
	g_return_val_if_fail (E_IS_MAIL_DISPLAY (display), FALSE);

	return display->priv->headers_collapsable;
}

void
e_mail_display_set_headers_collapsable (EMailDisplay *display,
                                        gboolean collapsable)
{
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	if ((display->priv->headers_collapsable ? 1 : 0) == (collapsable ? 1 : 0))
		return;

	display->priv->headers_collapsable = collapsable;
	e_mail_display_reload (display);

	g_object_notify (G_OBJECT (display), "headers-collapsable");
}

gboolean
e_mail_display_get_headers_collapsed (EMailDisplay *display)
{
	g_return_val_if_fail (E_IS_MAIL_DISPLAY (display), FALSE);

	if (display->priv->headers_collapsable)
		return display->priv->headers_collapsed;

	return FALSE;
}

void
e_mail_display_set_headers_collapsed (EMailDisplay *display,
                                      gboolean collapsed)
{
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	if ((display->priv->headers_collapsed ? 1 : 0) == (collapsed ? 1 : 0))
		return;

	display->priv->headers_collapsed = collapsed;

	g_object_notify (G_OBJECT (display), "headers-collapsed");
}

void
e_mail_display_load (EMailDisplay *display,
                     const gchar *msg_uri)
{
	gchar *uri;
	EMailPartList *part_list;

	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	display->priv->force_image_load = FALSE;

	part_list = display->priv->part_list;
	if (!part_list) {
		e_web_view_clear (E_WEB_VIEW (display));
		return;
	}

	uri = e_mail_part_build_uri (
		part_list->folder, part_list->message_uid,
		"mode", G_TYPE_INT, display->priv->mode,
		"headers_collapsable", G_TYPE_BOOLEAN, display->priv->headers_collapsable,
		"headers_collapsed", G_TYPE_BOOLEAN, display->priv->headers_collapsed,
		NULL);

	e_web_view_load_uri (E_WEB_VIEW (display), uri);

	g_free (uri);
}


static gboolean
do_reload_display (EMailDisplay *display)
{
	EWebView *web_view;
	const gchar *uri;
	gchar *base;
	GString *new_uri;
	GHashTable *table;
	GHashTableIter table_iter;
	gpointer key, val;

	web_view = E_WEB_VIEW (display);
	uri = e_web_view_get_uri (web_view);

	display->priv->scheduled_reload = 0;

	if (!uri || !*uri)
		return FALSE;

	if (strstr(uri, "?") == NULL) {
		e_web_view_reload (web_view);
		return FALSE;
	}

	base = g_strndup (uri, strstr (uri, "?") - uri + 1);
	new_uri = g_string_new (base);
	g_free (base);

	table = soup_form_decode (strstr (uri, "?") + 1);
	g_hash_table_replace (table, g_strdup ("mode"), g_strdup_printf ("%d", display->priv->mode));
	g_hash_table_replace (table, g_strdup ("headers_collapsable"), g_strdup_printf ("%d", display->priv->headers_collapsable));
	g_hash_table_replace (table, g_strdup ("headers_collapsed"), g_strdup_printf ("%d", display->priv->headers_collapsed));

	g_hash_table_iter_init (&table_iter, table);
	while (g_hash_table_iter_next (&table_iter, &key, &val)) {
		g_string_append_printf (new_uri, "%s=%s&",
			(gchar *) key, (gchar *) val);

		/* Free the value as Soup constructs the GHashTable without
		 * value_destroy_func */
		g_free (val);
	}

	e_web_view_load_uri (web_view, new_uri->str);

	g_string_free (new_uri, TRUE);
	g_hash_table_destroy (table);

	return FALSE;
}

void
e_mail_display_reload (EMailDisplay *display)
{
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	if (display->priv->scheduled_reload > 0)
		return;

	/* Schedule reloading if neccessary */
	display->priv->scheduled_reload =
		g_idle_add ((GSourceFunc) do_reload_display, display);
}

GtkAction *
e_mail_display_get_action (EMailDisplay *display,
                           const gchar *action_name)
{
	GtkAction *action;

	g_return_val_if_fail (E_IS_MAIL_DISPLAY (display), NULL);
	g_return_val_if_fail (action_name != NULL, NULL);

	action = e_web_view_get_action (E_WEB_VIEW (display), action_name);

	return action;
}

void
e_mail_display_set_status (EMailDisplay *display,
                           const gchar *status)
{
	gchar *str;

	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	str = g_strdup_printf (
		"<!DOCTYPE>"
		"<html>"
		  "<head><title>Evolution Mail Display</title></head>"
		  "<body>"
		    "<table border=\"0\" width=\"100%%\" height=\"100%%\">"
		      "<tr height=\"100%%\" valign=\"middle\">"
			"<td width=\"100%%\" align=\"center\">"
			  "<strong>%s</strong>"
			"</td>"
		      "</tr>"
		    "</table>"
		  "</body>"
		"</html>", status);

	e_web_view_load_string (E_WEB_VIEW (display), str);
	g_free (str);

	gtk_widget_show_all (GTK_WIDGET (display));
}

gchar *
e_mail_display_get_selection_plain_text (EMailDisplay *display,
                                         gint *len)
{
	EWebView *web_view;
	WebKitWebFrame *frame;
	const gchar *frame_name;
	GValue value = {0};
	GType type;
	const gchar *str;

	g_return_val_if_fail (E_IS_MAIL_DISPLAY (display), NULL);

	web_view = E_WEB_VIEW (display);
	frame = webkit_web_view_get_focused_frame (WEBKIT_WEB_VIEW (web_view));
	frame_name = webkit_web_frame_get_name (frame);

	type = e_web_view_frame_exec_script (web_view, frame_name, "window.getSelection().toString()", &value);
	g_return_val_if_fail (type == G_TYPE_STRING, NULL);

	str = g_value_get_string (&value);

	if (len)
		*len = strlen (str);

	return g_strdup (str);
}

void
e_mail_display_load_images (EMailDisplay *display)
{
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	display->priv->force_image_load = TRUE;
	e_web_view_reload (E_WEB_VIEW (display));
}

void
e_mail_display_set_force_load_images (EMailDisplay *display,
                                      gboolean force_load_images)
{
	g_return_if_fail (E_IS_MAIL_DISPLAY (display));

	display->priv->force_image_load = force_load_images;
}