path: root/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

#define LIBSOUP_USE_UNSTABLE_REQUEST_API

#include "e-mail-display.h"

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

#include "e-util/e-marshal.h"
#include "e-util/e-util.h"
#include "e-util/e-plugin-ui.h"
#include "mail/em-composer-utils.h"
#include "mail/em-utils.h"
#include "mail/e-mail-request.h"
#include "mail/em-format-html-display.h"
#include "mail/e-mail-attachment-bar.h"
#include "widgets/misc/e-attachment-button.h"

#include <camel/camel.h>

#include <libsoup/soup.h>
#include <libsoup/soup-requester.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 {
    EMFormatHTML *formatter;

    EMFormatWriteMode mode;
    gboolean headers_collapsable;
    gboolean headers_collapsed;

    GtkActionGroup *mailto_actions;
        GtkActionGroup *images_actions;

        gint force_image_load: 1;
};

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

static gpointer parent_class;

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 void
mail_display_webview_update_actions (EWebView *web_view,
                                     gpointer user_data)
{
    const gchar *image_src;
    gboolean visible;
    GtkAction *action;

    g_return_if_fail (web_view != NULL);

    image_src = e_web_view_get_cursor_image_src (web_view);
    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);
    }

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

static void
formatter_image_loading_policy_changed_cb (GObject *object,
                                           GParamSpec *pspec,
                                           gpointer user_data)
{
    EMailDisplay *display = user_data;

    e_mail_display_load_images (display);
}

static void
mail_display_update_formatter_colors (EMailDisplay *display)
{
    EMFormatHTMLColorType type;
    EMFormatHTML *formatter;
    GdkColor *color;
    GtkStateType state;
    GtkStyle *style;

    state = gtk_widget_get_state (GTK_WIDGET (display));
    formatter = display->priv->formatter;

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

    style = gtk_widget_get_style (GTK_WIDGET (display));
    if (style == NULL)
        return;

    g_object_freeze_notify (G_OBJECT (formatter));

    color = &style->bg[state];
    type = EM_FORMAT_HTML_COLOR_BODY;
    em_format_html_set_color (formatter, type, color);

    color = &style->base[GTK_STATE_NORMAL];
    type = EM_FORMAT_HTML_COLOR_CONTENT;
    em_format_html_set_color (formatter, type, color);

    color = &style->dark[state];
    type = EM_FORMAT_HTML_COLOR_FRAME;
    em_format_html_set_color (formatter, type, color);

    color = &style->fg[state];
    type = EM_FORMAT_HTML_COLOR_HEADER;
    em_format_html_set_color (formatter, type, color);

    color = &style->text[state];
    type = EM_FORMAT_HTML_COLOR_TEXT;
    em_format_html_set_color (formatter, type, color);

    g_object_thaw_notify (G_OBJECT (formatter));
}

static void
mail_display_set_property (GObject *object,
                           guint property_id,
                           const GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_FORMATTER:
            e_mail_display_set_formatter (
                E_MAIL_DISPLAY (object),
                g_value_get_object (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_FORMATTER:
            g_value_set_object (
                value, e_mail_display_get_formatter (
                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->formatter) {
        g_object_unref (priv->formatter);
        priv->formatter = NULL;
    }

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

static void
mail_display_realize (GtkWidget *widget)
{
    /* Chain up to parent's realize() method. */
    GTK_WIDGET_CLASS (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 (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) {
        EMFormat *format;
        CamelFolder *folder = NULL;
        EShell *shell;

        format = (EMFormat *) E_MAIL_DISPLAY (web_view)->priv->formatter;

        if (format != NULL && format->folder != NULL)
            folder = format->folder;

        shell = e_shell_get_default ();
        em_utils_compose_new_message_with_mailto (
            shell, mailto_uri, 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)
{
    EMailDisplay *display;
    const gchar *uri = webkit_network_request_get_uri (request);

    display = E_MAIL_DISPLAY (web_view);
    if (display->priv->formatter == NULL)
        return FALSE;

    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);
    EMFormat *formatter = EM_FORMAT (display->priv->formatter);
    const gchar *uri = webkit_network_request_get_uri (request);

    if (!formatter) {
        webkit_network_request_set_uri (request, "invalid://uri");
        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 = em_format_build_mail_uri (formatter->folder,
            formatter->message_uid,
            "part_id", G_TYPE_STRING, uri,
            "mode", G_TYPE_INT, EM_FORMAT_WRITE_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;

                /* 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. */
        if (!stream && !display->priv->force_image_load &&
            !em_format_html_can_load_images (display->priv->formatter)) {
            webkit_network_request_set_uri (request, "invalid://protocol");
            return;
        }

        new_uri = g_strconcat ("evo-", uri, NULL);
        mail_uri = em_format_build_mail_uri (formatter->folder,
                formatter->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;

        /* 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);
    gtk_widget_get_preferred_height (widget, &height, NULL);
    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;
    }

        /* 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)
{
        /* 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);
}

static void
attachment_button_expanded (GObject *object,
                            GParamSpec *pspec,
                            gpointer user_data)
{
    EAttachmentButton *button = E_ATTACHMENT_BUTTON (object);
    WebKitDOMElement *attachment = user_data;
    WebKitDOMCSSStyleDeclaration *css;
    gboolean expanded;

    d(printf("Attachment button %s (%p) expansion state toggled!\n",
        (gchar *) g_object_get_data (object, "uri"), object));

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

    if (!WEBKIT_DOM_IS_ELEMENT (attachment)) {
        d(printf("%s: Parent element for button %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 (attachment);
    webkit_dom_css_style_declaration_set_property (
        css, "display", expanded ? "block" : "none", "", NULL);
}

static void
constraint_widget_visibility (GObject *object,
                              GParamSpec *pspec,
                              gpointer user_data)
{
    GtkWidget *widget = GTK_WIDGET (object);
    EAttachmentButton *button = user_data;

    gboolean can_show = e_attachment_button_get_expanded (button);
    gboolean is_visible = gtk_widget_get_visible (widget);

    if (is_visible && !can_show)
        gtk_widget_hide (widget);
    else if (!is_visible && can_show)
        gtk_widget_show (widget);

        /* Otherwise it's OK */
}

static void
bind_iframe_content_visibility (EAttachmentButton *button,
                                WebKitDOMElement *iframe)
{
    WebKitDOMDocument *document;
    WebKitDOMNodeList *nodes;
    gulong i, length;

    if (!WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT (iframe))
        return;

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

    d(printf("Found %ld objects within iframe %s\n", length,
        webkit_dom_html_iframe_element_get_name (
            WEBKIT_DOM_HTML_IFRAME_ELEMENT (iframe))));

        /* 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);
        GtkWidget *widget;

        widget = g_object_get_data (G_OBJECT (node), "widget");
        if (!widget)
            continue;

        d(printf("Binding visibility of widget %s (%p) with button %s (%p)\n",
            (gchar *) g_object_get_data (G_OBJECT (widget), "uri"), widget,
            (gchar *) g_object_get_data (G_OBJECT (button), "uri"), button));

        g_object_bind_property (
            button, "expanded",
            widget, "visible",
            G_BINDING_SYNC_CREATE);

                /* Ensure that someone won't attempt to _show() the widget when
                 * it is supposed to be hidden and vice versa. */
        g_signal_connect (widget, "notify::visible",
            G_CALLBACK (constraint_widget_visibility), button);
    }
}

static void
bind_attachment_iframe_visibility (GObject *object,
                                   GParamSpec *pspec,
                                   gpointer user_data)
{
    WebKitWebFrame *webframe;
    const gchar *frame_name;
    gchar *button_uri;
    WebKitDOMDocument *document;
    WebKitDOMElement *attachment;
    WebKitDOMElement *button_element;
    WebKitDOMNodeList *nodes;
    gulong i, length;
    GtkWidget *button;

        /* Whenever an <iframe> is loaded, bind visibility of all GtkWidgets
         * the document within the <iframe> contains with "expanded" property
         * of the EAttachmentButton */

    webframe = WEBKIT_WEB_FRAME (object);
    if (webkit_web_frame_get_load_status (webframe) != WEBKIT_LOAD_FINISHED)
        return;

    frame_name = webkit_web_frame_get_name (webframe);

    d(printf("Rebinding visibility of frame %s because it's URL changed\n",
         frame_name));

        /* Get DOMDocument of the main document */
    document = webkit_web_view_get_dom_document (
        webkit_web_frame_get_web_view (webframe));
    if (!document)
        return;

        /* Find the <DIV> containing the <iframe> and related EAttachmentButton
         * within the DOM */
    attachment = find_element_by_id (document, frame_name);
    if (!attachment)
        return;

    button_uri = g_strconcat (frame_name, ".attachment_button", NULL);
    button_element = find_element_by_id (document, button_uri);
    g_free (button_uri);
    if (!button_element)
        return;

    button = g_object_get_data (G_OBJECT (button_element), "widget");

        /* Get <iframe> representing the attachment content */
    nodes = webkit_dom_element_get_elements_by_tag_name (attachment, "iframe");
    length = webkit_dom_node_list_get_length (nodes);
    for (i = 0; i < length; i++) {

        WebKitDOMNode *node =
            webkit_dom_node_list_item (nodes, i);

        if (!WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT (node))
            continue;

                /* Bind visibility of all GtkWidget within the
                 * iframe with "expanded" property of the button */
        bind_iframe_content_visibility (
            E_ATTACHMENT_BUTTON (button),
            WEBKIT_DOM_ELEMENT (node));
    }
}

static GtkWidget *
mail_display_plugin_widget_requested (WebKitWebView *web_view,
                                      gchar *mime_type,
                                      gchar *uri,
                                      GHashTable *param,
                                      gpointer user_data)
{
    EMFormat *emf;
    EMailDisplay *display;
    EMFormatPURI *puri;
    GtkWidget *widget;
    gchar *puri_uri;

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

    display = E_MAIL_DISPLAY (web_view);
    emf = (EMFormat *) display->priv->formatter;

    puri = em_format_find_puri (emf, puri_uri);
    if (!puri) {
        return NULL;
    }

    if (puri->widget_func)
        widget = puri->widget_func (emf, puri, NULL);
    else
        widget = NULL;

    if (!widget)
        return NULL;

    if (E_IS_ATTACHMENT_BUTTON (widget)) {
                /* Attachment button has URI different then the actual PURI because
                 * that URI identifies the attachment itself */
        gchar *button_uri = g_strconcat (puri_uri, ".attachment_button", NULL);
        g_object_set_data_full (G_OBJECT (widget), "uri",
            button_uri, (GDestroyNotify) g_free);
    } else {
        g_object_set_data_full (G_OBJECT (widget), "uri",
            g_strdup (puri_uri), (GDestroyNotify) g_free);
    }

        /* Set widget's <object> container as GObject data "parent_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);

        /* Embed the attachment bar into the GtkBox before we do anything
         * further with the widget. */
    if (E_IS_MAIL_ATTACHMENT_BAR (widget)) {

                /* When EMailAttachmentBar is expanded/collapsed it does not
                 * emit size-allocate signal despite it changes it's height. */
        GtkWidget *box = NULL;

                /* Only when packed in box, EMailAttachmentBar reports correct 
                 * height */
        box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
        gtk_box_pack_start (GTK_BOX (box), widget, FALSE, FALSE, 0);

        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);

                /* Show the EAttachmentBar but not the containing layout */
        gtk_widget_show (widget);

        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;

        document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (display));
        attachment = find_element_by_id (document, puri_uri);
        if (!attachment) {
            e_attachment_button_set_expandable (
                E_ATTACHMENT_BUTTON (widget), FALSE);
        } else {
            const CamelContentDisposition *disposition;
            WebKitDOMNodeList *nodes;
            gulong i, length;

                        /* Show/hide the attachment when the EAttachmentButton
                         * is expanded/collapsed or shown/hidden */
            g_signal_connect_data (widget, "notify::expanded",
                G_CALLBACK (attachment_button_expanded),
                g_object_ref (attachment), (GClosureNotify) g_object_unref, 0);
            g_signal_connect_data (widget, "notify::visible",
                G_CALLBACK (attachment_button_expanded),
                g_object_ref (attachment), (GClosureNotify) g_object_unref, 0);
                        /* Initial synchronization */
            attachment_button_expanded (G_OBJECT (widget),
                NULL, attachment);

                        /* Find all <iframes> within the attachment and bind
                         * it's visiblity to expanded state of the attachment btn */
            nodes = webkit_dom_element_get_elements_by_tag_name (
                    attachment, "iframe");
            length = webkit_dom_node_list_get_length (nodes);
            for (i = 0; i < length; i++) {

                WebKitDOMNode *node =
                    webkit_dom_node_list_item (nodes, i);

                if (!WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT (node))
                    continue;

                bind_iframe_content_visibility (
                    E_ATTACHMENT_BUTTON (widget),
                    WEBKIT_DOM_ELEMENT (node));
            }

                        /* Expand inlined attachments */
            disposition =
                camel_mime_part_get_content_disposition (puri->part);
            if (disposition &&
                g_ascii_strncasecmp (
                disposition->disposition, "inline", 6) == 0) {

                e_attachment_button_set_expanded (
                    E_ATTACHMENT_BUTTON (widget), TRUE);
            }
        }
    }

    d(printf("Created widget %s (%p)\n", puri_uri, 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;

    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);

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

    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
puri_bind_dom (GObject *object,
               GParamSpec *pspec,
               gpointer user_data)
{
    WebKitWebFrame *frame;
    WebKitLoadStatus load_status;
    WebKitWebView *web_view;
    WebKitDOMDocument *document;
    EMailDisplay *display;
    GList *iter;
    EMFormat *emf;
    const gchar *frame_puri;

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

    if (load_status != WEBKIT_LOAD_FINISHED)
        return;

    frame_puri = webkit_web_frame_get_name (frame);
    web_view = webkit_web_frame_get_web_view (frame);
    display = E_MAIL_DISPLAY (web_view);

    emf = EM_FORMAT (display->priv->formatter);
    if (!emf)
        return;

    iter = g_hash_table_lookup (
            emf->mail_part_table,
            webkit_web_frame_get_name (frame));

    document = webkit_web_view_get_dom_document (web_view);

    while (iter) {

        EMFormatPURI *puri = iter->data;

        if (!puri)
            continue;

        /* Iterate only the PURI rendered in the frame and all it's "subPURIs" */
        if (!g_str_has_prefix (puri->uri, frame_puri))
            break;

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

        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)));

        /* Re-bind visibility of this newly created <iframe> with
         * related EAttachmentButton whenever content of this <iframe> is
         * (re)loaded */
    g_signal_connect (frame, "notify::load-status",
        G_CALLBACK (bind_attachment_iframe_visibility), NULL);

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

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

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EMailDisplayPrivate));

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

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

    g_object_class_install_property (
        object_class,
        PROP_FORMATTER,
        g_param_spec_object (
            "formatter",
            "HTML Formatter",
            NULL,
            EM_TYPE_FORMAT_HTML,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_MODE,
        g_param_spec_int (
            "mode",
            "Display Mode",
            NULL,
            0,
            G_MAXINT,
            EM_FORMAT_WRITE_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;
    GError *error = NULL;
    SoupSession *session;
    SoupSessionFeature *feature;
    const gchar *user_cache_dir;
    WebKitWebSettings *settings;
    WebKitWebFrame *main_frame;

    display->priv = E_MAIL_DISPLAY_GET_PRIVATE (display);

    display->priv->force_image_load = FALSE;
    display->priv->mailto_actions = gtk_action_group_new ("mailto");
    gtk_action_group_add_actions (display->priv->mailto_actions, mailto_entries,
        G_N_ELEMENTS (mailto_entries), NULL);

    display->priv->images_actions = gtk_action_group_new ("image");
    gtk_action_group_add_actions (display->priv->images_actions, image_entries,
        G_N_ELEMENTS (image_entries), NULL);

    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, "update-actions",
              G_CALLBACK (mail_display_webview_update_actions), 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);

    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 (puri_bind_dom), NULL);

        /* Because we are loading from a hard-coded string, there is
         * no chance of I/O errors.  Failure here implies a malformed
         * UI definition.  Full stop. */
    ui_manager = e_web_view_get_ui_manager (E_WEB_VIEW (display));
    gtk_ui_manager_insert_action_group (ui_manager, display->priv->mailto_actions, 0);
    gtk_ui_manager_add_ui_from_string (ui_manager, ui, -1, &error);

    if (error != NULL) {
        g_error ("%s", error->message);
        g_error_free (error);
    }

    error = NULL;
    gtk_ui_manager_insert_action_group (ui_manager, display->priv->images_actions, 0);
    gtk_ui_manager_add_ui_from_string (ui_manager, image_ui, -1, &error);

    if (error != NULL) {
        g_error ("%s", error->message);
        g_error_free (error);
    }

    /* Register our own handler for our own mail:// protocol */
    session = webkit_get_default_session ();
    feature = SOUP_SESSION_FEATURE (soup_requester_new ());
    soup_session_feature_add_feature (feature, E_TYPE_MAIL_REQUEST);
    soup_session_add_feature (session, feature);
    g_object_unref (feature);

    /* 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);
    }
}

EMFormatHTML *
e_mail_display_get_formatter (EMailDisplay *display)
{
    g_return_val_if_fail (E_IS_MAIL_DISPLAY (display), NULL);

    return display->priv->formatter;
}

void
e_mail_display_set_formatter (EMailDisplay *display,
                              EMFormatHTML *formatter)
{
    g_return_if_fail (E_IS_MAIL_DISPLAY (display));
    g_return_if_fail (EM_IS_FORMAT_HTML (formatter));

    g_object_ref (formatter);

    if (display->priv->formatter != NULL) {
        /* The formatter might still exist after unrefing it, so 
         * we need to stop listening to it's request for redrawing */
        g_signal_handlers_disconnect_by_func (
            display->priv->formatter, e_mail_display_reload, display);
        g_object_unref (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_signal_connect_swapped (formatter, "redraw-requested",
        G_CALLBACK (e_mail_display_reload), display);
    g_signal_connect_swapped (formatter, "notify::charset",
        G_CALLBACK (e_mail_display_reload), display);

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

EMFormatWriteMode
e_mail_display_get_mode (EMailDisplay *display)
{
    g_return_val_if_fail (E_IS_MAIL_DISPLAY (display),
            EM_FORMAT_WRITE_MODE_NORMAL);

    return display->priv->mode;
}

void
e_mail_display_set_mode (EMailDisplay *display,
                         EMFormatWriteMode mode)
{
    g_return_if_fail (E_IS_MAIL_DISPLAY (display));

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

    display->priv->mode = mode;

    e_mail_display_reload (display);

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

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 == collapsable)
        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 == collapsed)
        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)
{
    EMFormat *emf;
    gchar *uri;

    g_return_if_fail (E_IS_MAIL_DISPLAY (display));

    display->priv->force_image_load = FALSE;

    emf = EM_FORMAT (display->priv->formatter);

    uri = em_format_build_mail_uri (emf->folder, emf->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);
}

void
e_mail_display_reload (EMailDisplay *display)
{
    EWebView *web_view;
    const gchar *uri;
    gchar *base;
    GString *new_uri;
    GHashTable *table;
    GHashTableIter table_iter;
    gpointer key, val;
    gchar separator;

    g_return_if_fail (E_IS_MAIL_DISPLAY (display));

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

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

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

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

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

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

    if (separator == '?')
        separator = '&';
    }

    e_web_view_load_uri (web_view, new_uri->str);

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

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 = gtk_action_group_get_action (display->priv->mailto_actions, action_name);
    if (!action)
        action = gtk_action_group_get_action (display->priv->images_actions, 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;
}