/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 *  Copyright © 2008, 2009 Gustavo Noronha Silva
 *  Copyright © 2009, 2010, 2014 Igalia S.L.
 *
 *  This file is part of Epiphany.
 *
 *  Epiphany is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Epiphany is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Epiphany.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"
#include "ephy-web-view.h"

#include "ephy-about-handler.h"
#include "ephy-debug.h"
#include "ephy-embed-container.h"
#include "ephy-embed-prefs.h"
#include "ephy-embed-shell.h"
#include "ephy-embed-type-builtins.h"
#include "ephy-embed-utils.h"
#include "ephy-embed.h"
#include "ephy-favicon-helpers.h"
#include "ephy-file-helpers.h"
#include "ephy-file-monitor.h"
#include "ephy-gsb-utils.h"
#include "ephy-history-service.h"
#include "ephy-lib-type-builtins.h"
#include "ephy-permissions-manager.h"
#include "ephy-prefs.h"
#include "ephy-settings.h"
#include "ephy-snapshot-service.h"
#include "ephy-string.h"
#include "ephy-uri-helpers.h"
#include "ephy-view-source-handler.h"
#include "ephy-web-app-utils.h"
#include "ephy-web-extension-proxy.h"
#include "ephy-zoom.h"

#include <gio/gio.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include <libsoup/soup.h>

/**
 * SECTION:ephy-web-view
 * @short_description: Epiphany custom #WebkitWebView
 *
 * #EphyWebView wraps #WebkitWebView implementing custom functionality on top of
 * it.
 */

#define MAX_HIDDEN_POPUPS       5

#define EPHY_PAGE_TEMPLATE_ERROR         "/org/gnome/epiphany/page-templates/error.html"
#define EPHY_PAGE_TEMPLATE_ERROR_CSS     "/org/gnome/epiphany/page-templates/error.css"

struct _EphyWebView {
  WebKitWebView parent_instance;

  EphySecurityLevel security_level;
  EphyWebViewDocumentType document_type;
  EphyWebViewNavigationFlags nav_flags;

  /* Flags */
  guint is_blank : 1;
  guint is_setting_zoom : 1;
  guint load_failed : 1;
  guint history_frozen : 1;
  guint ever_committed : 1;

  char *address;
  char *display_address;
  char *typed_address;
  char *last_committed_address;
  char *loading_message;
  char *link_message;
  GdkPixbuf *icon;

  /* Reader mode */
  char *reader_content;
  char *reader_byline;
  gboolean reader_loading;
  gboolean reader_active;
  guint reader_js_timeout;
  char *reader_url;

  /* Local file watch. */
  EphyFileMonitor *file_monitor;

  /* Regex to figure out if we're dealing with a wanna-be URI */
  GRegex *non_search_regex;
  GRegex *domain_regex;

  GSList *hidden_popups;
  GSList *shown_popups;

  GtkWidget *geolocation_info_bar;
  GtkWidget *notification_info_bar;
  GtkWidget *microphone_info_bar;
  GtkWidget *webcam_info_bar;
  GtkWidget *password_info_bar;
  GtkWidget *sensitive_form_info_bar;

  EphyHistoryService *history_service;
  GCancellable *history_service_cancellable;

  guint snapshot_timeout_id;
  char *pending_snapshot_uri;

  EphyHistoryPageVisitType visit_type;

  gulong do_not_track_handler;

  /* TLS information. */
  GTlsCertificate *certificate;
  GTlsCertificateFlags tls_errors;

  gboolean bypass_safe_browsing;
  gboolean loading_error_page;
  char *tls_error_failing_uri;

  EphyWebViewErrorPage error_page;

  /* Web Extension */
  EphyWebExtensionProxy *web_extension;
};

typedef struct {
  char *url;
  char *name;
  char *features;
} PopupInfo;

enum {
  PROP_0,
  PROP_ADDRESS,
  PROP_DOCUMENT_TYPE,
  PROP_HIDDEN_POPUP_COUNT,
  PROP_ICON,
  PROP_LINK_MESSAGE,
  PROP_NAVIGATION,
  PROP_POPUPS_ALLOWED,
  PROP_SECURITY,
  PROP_STATUS_MESSAGE,
  PROP_TYPED_ADDRESS,
  PROP_IS_BLANK,
  PROP_READER_MODE,
  LAST_PROP
};

static GParamSpec *obj_properties[LAST_PROP];

G_DEFINE_TYPE (EphyWebView, ephy_web_view, WEBKIT_TYPE_WEB_VIEW)

static guint
popup_blocker_n_hidden (EphyWebView *view)
{
  return g_slist_length (view->hidden_popups);
}

static void
popups_manager_free_info (PopupInfo *popup)
{
  g_free (popup->url);
  g_free (popup->name);
  g_free (popup->features);
  g_slice_free (PopupInfo, popup);
}

static void
popups_manager_show (PopupInfo   *popup,
                     EphyWebView *view)
{
  /* Only show popup with non NULL url */
  if (popup->url != NULL) {
    /* FIXME: we need a way of opening windows in here. This used to
     * be implemented in EphyEmbedSingle open_window method, but it's
     * been a no-op for a while. */
  }
  popups_manager_free_info (popup);
}

static void
popups_manager_show_all (EphyWebView *view)
{
  LOG ("popup_blocker_show_all: view %p", view);

  g_slist_foreach (view->hidden_popups,
                   (GFunc)popups_manager_show, view);
  g_slist_free (view->hidden_popups);
  view->hidden_popups = NULL;

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_HIDDEN_POPUP_COUNT]);
}

static char *
popups_manager_new_window_info (EphyEmbedContainer *container)
{
  EphyEmbed *embed;
  GtkAllocation allocation;
  gboolean is_popup;
  char *features;

  g_object_get (container, "is-popup", &is_popup, NULL);
  g_assert (is_popup);

  embed = ephy_embed_container_get_active_child (container);
  g_assert (embed != NULL);

  gtk_widget_get_allocation (GTK_WIDGET (embed), &allocation);

  features = g_strdup_printf
               ("width=%d,height=%d,toolbar=%d",
               allocation.width,
               allocation.height,
               1);

  return features;
}

static void
popups_manager_add (EphyWebView *view,
                    const char  *url,
                    const char  *name,
                    const char  *features)
{
  PopupInfo *popup;

  LOG ("popups_manager_add: view %p, url %s, features %s",
       view, url, features);

  popup = g_slice_new (PopupInfo);

  popup->url = g_strdup (url);
  popup->name = g_strdup (name);
  popup->features = g_strdup (features);

  view->hidden_popups = g_slist_prepend (view->hidden_popups, popup);

  if (popup_blocker_n_hidden (view) > MAX_HIDDEN_POPUPS) {/* bug #160863 */
    /* Remove the oldest popup */
    GSList *l = view->hidden_popups;

    while (l->next->next != NULL) {
      l = l->next;
    }

    popup = (PopupInfo *)l->next->data;
    popups_manager_free_info (popup);

    l->next = NULL;
  } else {
    g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_HIDDEN_POPUP_COUNT]);
  }
}

static void
popups_manager_hide (EphyEmbedContainer *container,
                     EphyWebView        *parent_view)
{
  EphyEmbed *embed;
  const char *location;
  char *features;

  embed = ephy_embed_container_get_active_child (container);
  g_assert (EPHY_IS_EMBED (embed));

  location = ephy_web_view_get_address (ephy_embed_get_web_view (embed));
  if (location == NULL)
    return;

  features = popups_manager_new_window_info (container);

  popups_manager_add (parent_view, location, "" /* FIXME? maybe _blank? */, features);

  gtk_widget_destroy (GTK_WIDGET (container));

  g_free (features);
}

static void
popups_manager_hide_all (EphyWebView *view)
{
  LOG ("popup_blocker_hide_all: view %p", view);

  g_slist_foreach (view->shown_popups,
                   (GFunc)popups_manager_hide, view);
  g_slist_free (view->shown_popups);
  view->shown_popups = NULL;
}

static void
ephy_web_view_set_popups_allowed (EphyWebView *view,
                                  gboolean     allowed)
{
  if (allowed) {
    popups_manager_show_all (view);
  } else {
    popups_manager_hide_all (view);
  }
}

static gboolean
ephy_web_view_get_popups_allowed (EphyWebView *view)
{
  const char *location;
  gboolean allow;

  location = ephy_web_view_get_address (view);
  if (location == NULL) return FALSE;/* FALSE, TRUE… same thing */

  allow = g_settings_get_boolean (EPHY_SETTINGS_WEB,
                                  EPHY_PREFS_WEB_ENABLE_POPUPS);
  return allow;
}

static gboolean
popups_manager_remove_window (EphyWebView        *view,
                              EphyEmbedContainer *container)
{
  view->shown_popups = g_slist_remove (view->shown_popups, container);

  return FALSE;
}

static void
popups_manager_add_window (EphyWebView        *view,
                           EphyEmbedContainer *container)
{
  LOG ("popups_manager_add_window: view %p, container %p", view, container);

  view->shown_popups = g_slist_prepend (view->shown_popups, container);

  g_signal_connect_swapped (container, "destroy",
                            G_CALLBACK (popups_manager_remove_window),
                            view);
}

static void
disconnect_popup (EphyEmbedContainer *container,
                  EphyWebView        *view)
{
  g_signal_handlers_disconnect_by_func
    (container, G_CALLBACK (popups_manager_remove_window), view);
}

/**
 * ephy_web_view_popups_manager_reset:
 * @view: an #EphyWebView
 *
 * Resets the state of the popups manager in @view.
 **/
void
ephy_web_view_popups_manager_reset (EphyWebView *view)
{
  g_slist_foreach (view->hidden_popups,
                   (GFunc)popups_manager_free_info, NULL);
  g_slist_free (view->hidden_popups);
  view->hidden_popups = NULL;

  g_slist_foreach (view->shown_popups,
                   (GFunc)disconnect_popup, view);
  g_slist_free (view->shown_popups);
  view->shown_popups = NULL;

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_HIDDEN_POPUP_COUNT]);
  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_POPUPS_ALLOWED]);
}

static void
ephy_web_view_get_property (GObject    *object,
                            guint       prop_id,
                            GValue     *value,
                            GParamSpec *pspec)
{
  EphyWebView *view = EPHY_WEB_VIEW (object);

  switch (prop_id) {
    case PROP_ADDRESS:
      g_value_set_string (value, view->address);
      break;
    case PROP_TYPED_ADDRESS:
      g_value_set_string (value, view->typed_address);
      break;
    case PROP_DOCUMENT_TYPE:
      g_value_set_enum (value, view->document_type);
      break;
    case PROP_HIDDEN_POPUP_COUNT:
      g_value_set_int (value, popup_blocker_n_hidden
                         (EPHY_WEB_VIEW (object)));
      break;
    case PROP_ICON:
      g_value_set_object (value, view->icon);
      break;
    case PROP_LINK_MESSAGE:
      g_value_set_string (value, view->link_message);
      break;
    case PROP_NAVIGATION:
      g_value_set_flags (value, view->nav_flags);
      break;
    case PROP_POPUPS_ALLOWED:
      g_value_set_boolean (value, ephy_web_view_get_popups_allowed
                             (EPHY_WEB_VIEW (object)));
      break;
    case PROP_SECURITY:
      g_value_set_enum (value, view->security_level);
      break;
    case PROP_STATUS_MESSAGE:
      g_value_set_string (value, ephy_web_view_get_status_message (EPHY_WEB_VIEW (object)));
      break;
    case PROP_IS_BLANK:
      g_value_set_boolean (value, view->is_blank);
      break;
    case PROP_READER_MODE:
      g_value_set_boolean (value, view->reader_content != NULL);
      break;
    default:
      break;
  }
}

static void
ephy_web_view_set_property (GObject      *object,
                            guint         prop_id,
                            const GValue *value,
                            GParamSpec   *pspec)
{
  switch (prop_id) {
    case PROP_POPUPS_ALLOWED:
      ephy_web_view_set_popups_allowed (EPHY_WEB_VIEW (object), g_value_get_boolean (value));
      break;
    case PROP_TYPED_ADDRESS:
      ephy_web_view_set_typed_address (EPHY_WEB_VIEW (object), g_value_get_string (value));
      break;
      break;
    case PROP_ADDRESS:
    case PROP_DOCUMENT_TYPE:
    case PROP_HIDDEN_POPUP_COUNT:
    case PROP_ICON:
    case PROP_LINK_MESSAGE:
    case PROP_NAVIGATION:
    case PROP_SECURITY:
    case PROP_STATUS_MESSAGE:
    case PROP_IS_BLANK:
    case PROP_READER_MODE:
      /* read only */
      break;
    default:
      break;
  }
}

static gboolean
ephy_web_view_key_press_event (GtkWidget *widget, GdkEventKey *event)
{
  EphyWebView *web_view = EPHY_WEB_VIEW (widget);
  gboolean key_handled = FALSE;

  key_handled = GTK_WIDGET_CLASS (ephy_web_view_parent_class)->key_press_event (widget, event);

  if (key_handled)
    return TRUE;

  g_signal_emit_by_name (web_view, "search-key-press", event, &key_handled);

  return key_handled;
}

static gboolean
ephy_web_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
{
  /* These are the special cases WebkitWebView doesn't handle but we have an
   * interest in handling. */

  /* Handle typical back/forward mouse buttons. */
  if (event->button == 8) {
    webkit_web_view_go_back (WEBKIT_WEB_VIEW (widget));
    return TRUE;
  }

  if (event->button == 9) {
    webkit_web_view_go_forward (WEBKIT_WEB_VIEW (widget));
    return TRUE;
  }

  /* Let WebKitWebView handle this. */
  return GTK_WIDGET_CLASS (ephy_web_view_parent_class)->button_press_event (widget, event);
}

static void
untrack_info_bar (GtkWidget **tracked_info_bar)
{
  g_assert (tracked_info_bar);
  g_assert (!*tracked_info_bar || GTK_IS_INFO_BAR (*tracked_info_bar));

  if (*tracked_info_bar) {
    g_object_remove_weak_pointer (G_OBJECT (*tracked_info_bar), (gpointer *)tracked_info_bar);
    gtk_widget_destroy (*tracked_info_bar);
    *tracked_info_bar = NULL;
  }
}

static void
track_info_bar (GtkWidget  *new_info_bar,
                GtkWidget **tracked_info_bar)
{
  g_assert (GTK_IS_INFO_BAR (new_info_bar));
  g_assert (tracked_info_bar);
  g_assert (!*tracked_info_bar || GTK_IS_INFO_BAR (*tracked_info_bar));

  untrack_info_bar (tracked_info_bar);

  *tracked_info_bar = new_info_bar;
  g_object_add_weak_pointer (G_OBJECT (new_info_bar),
                             (gpointer *)tracked_info_bar);
}

static GtkWidget *
ephy_web_view_create_form_auth_save_confirmation_info_bar (EphyWebView *web_view,
                                                           const char  *origin,
                                                           const char  *username)
{
  GtkWidget *info_bar;
  GtkWidget *action_area;
  GtkWidget *content_area;
  GtkWidget *label;
  char *message;

  LOG ("Going to show infobar about %s", webkit_web_view_get_uri (WEBKIT_WEB_VIEW (web_view)));

  info_bar = gtk_info_bar_new_with_buttons (_("Not No_w"), GTK_RESPONSE_CLOSE,
                                            _("_Never Save"), GTK_RESPONSE_REJECT,
                                            _("_Save"), GTK_RESPONSE_YES,
                                            NULL);

  action_area = gtk_info_bar_get_action_area (GTK_INFO_BAR (info_bar));
  gtk_orientable_set_orientation (GTK_ORIENTABLE (action_area),
                                  GTK_ORIENTATION_HORIZONTAL);

  label = gtk_label_new (NULL);
  /* Translators: The %s the hostname where this is happening.
   * Example: mail.google.com.
   */
  message = g_markup_printf_escaped (_("Do you want to save your password for “%s”?"), origin);
  gtk_label_set_markup (GTK_LABEL (label), message);
  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
  g_free (message);

  content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar));
  gtk_container_add (GTK_CONTAINER (content_area), label);
  gtk_widget_show (label);

  track_info_bar (info_bar, &web_view->password_info_bar);

  ephy_embed_add_top_widget (EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (web_view),
                             info_bar,
                             EPHY_EMBED_TOP_WIDGET_POLICY_RETAIN_ON_TRANSITION);

  return info_bar;
}

static void
update_navigation_flags (WebKitWebView *view)
{
  guint flags = 0;

  if (webkit_web_view_can_go_back (view))
    flags |= EPHY_WEB_VIEW_NAV_BACK;

  if (webkit_web_view_can_go_forward (view))
    flags |= EPHY_WEB_VIEW_NAV_FORWARD;

  if (EPHY_WEB_VIEW (view)->nav_flags != (EphyWebViewNavigationFlags)flags) {
    EPHY_WEB_VIEW (view)->nav_flags = (EphyWebViewNavigationFlags)flags;

    g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_NAVIGATION]);
  }
}

static void
ephy_web_view_freeze_history (EphyWebView *view)
{
  view->history_frozen = TRUE;
}

static void
ephy_web_view_thaw_history (EphyWebView *view)
{
  view->history_frozen = FALSE;
}

static gboolean
ephy_web_view_is_history_frozen (EphyWebView *view)
{
  return view->history_frozen;
}

static void
got_snapshot_path_cb (EphySnapshotService *service,
                      GAsyncResult        *result,
                      char                *url)
{
  char *snapshot;
  GError *error = NULL;

  snapshot = ephy_snapshot_service_get_snapshot_path_finish (service, result, &error);
  if (snapshot) {
    ephy_embed_shell_set_thumbnail_path (ephy_embed_shell_get_default (), url, snapshot);
    g_free (snapshot);
  } else {
    /* Bad luck, not something to warn about. */
    g_info ("Failed to get snapshot for URL %s: %s", url, error->message);
    g_error_free (error);
  }
  g_free (url);
}

static void
take_snapshot (EphyWebView *view)
{
  EphySnapshotService *service = ephy_snapshot_service_get_default ();

  ephy_snapshot_service_get_snapshot_path_async (service, WEBKIT_WEB_VIEW (view), NULL,
                                                 (GAsyncReadyCallback)got_snapshot_path_cb,
                                                 g_strdup (view->pending_snapshot_uri));
}

static void
history_service_query_urls_cb (EphyHistoryService *service,
                               gboolean            success,
                               GList              *urls,
                               EphyWebView        *view)
{
  const char *url = webkit_web_view_get_uri (WEBKIT_WEB_VIEW (view));

  if (!success)
    goto out;

  /* Have we already started a new load? */
  if (g_strcmp0 (url, view->pending_snapshot_uri) != 0)
    goto out;

  for (GList *l = urls; l; l = g_list_next (l)) {
    EphyHistoryURL *history_url = l->data;

    /* Take snapshot if this URL is one of the top history results. */
    if (strcmp (history_url->url, view->pending_snapshot_uri) == 0) {
      take_snapshot (view);
      break;
    }
  }

out:
  g_clear_pointer (&view->pending_snapshot_uri, g_free);
  g_object_unref (view);
}

static gboolean
maybe_take_snapshot (EphyWebView *view)
{
  EphyEmbedShell *shell;
  EphyHistoryService *service;
  EphyHistoryQuery *query;

  view->snapshot_timeout_id = 0;

  if (view->error_page != EPHY_WEB_VIEW_ERROR_PAGE_NONE)
    return FALSE;

  shell = ephy_embed_shell_get_default ();
  service = ephy_embed_shell_get_global_history_service (shell);

  /* We want to save snapshots for just a couple more pages than are present
   * in the overview, so new snapshots are immediately available when the user
   * deletes a couple pages from the overview. Let's say five more.
   */
  query = ephy_history_query_new_for_overview ();
  query->limit += 5;
  ephy_history_service_query_urls (service, query, NULL,
                                   (EphyHistoryJobCallback)history_service_query_urls_cb,
                                   g_object_ref (view));
  ephy_history_query_free (query);

  return FALSE;
}

static void
_ephy_web_view_update_icon (EphyWebView *view)
{
  if (view->icon != NULL) {
    g_object_unref (view->icon);
    view->icon = NULL;
  }

  if (view->address) {
    cairo_surface_t *icon_surface = webkit_web_view_get_favicon (WEBKIT_WEB_VIEW (view));
    if (icon_surface)
      view->icon = ephy_pixbuf_get_from_surface_scaled (icon_surface, FAVICON_SIZE, FAVICON_SIZE);
  }

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_ICON]);
}

static void
icon_changed_cb (EphyWebView *view,
                 GParamSpec  *pspec,
                 gpointer     user_data)
{
  _ephy_web_view_update_icon (view);
}

typedef struct {
  EphyWebView *web_view;
  guint request_id;
  char *origin;
} FormAuthRequestData;

static FormAuthRequestData *
form_auth_request_data_new (EphyWebView *web_view,
                            guint        request_id,
                            const char  *origin)
{
  FormAuthRequestData *data;
  data = g_slice_new (FormAuthRequestData);
  data->web_view = web_view;
  data->request_id = request_id;
  data->origin = g_strdup (origin);
  return data;
}

static void
form_auth_request_data_free (FormAuthRequestData *data)
{
  g_free (data->origin);
  g_slice_free (FormAuthRequestData, data);
}

static void
form_auth_save_confirmation_info_bar_destroyed_cb (FormAuthRequestData *data,
                                                   GObject             *where_the_info_bar_was)
{
  /* Ensure the hash table entry in the web process is removed. */
  if (data->web_view->web_extension)
    ephy_web_extension_proxy_form_auth_data_save_confirmation_response (data->web_view->web_extension,
                                                                        data->request_id,
                                                                        FALSE);
  form_auth_request_data_free (data);
}

static void
form_auth_data_save_confirmation_response (GtkInfoBar          *info_bar,
                                           gint                 response_id,
                                           FormAuthRequestData *data)
{
  if (data->web_view->web_extension) {
    ephy_web_extension_proxy_form_auth_data_save_confirmation_response (data->web_view->web_extension,
                                                                        data->request_id,
                                                                        response_id == GTK_RESPONSE_YES);
  }

  if (response_id == GTK_RESPONSE_REJECT) {
    EphyEmbedShell *shell = ephy_embed_shell_get_default ();
    EphyPermissionsManager *manager = ephy_embed_shell_get_permissions_manager (shell);

    ephy_permissions_manager_set_permission (manager,
                                             EPHY_PERMISSION_TYPE_SAVE_PASSWORD,
                                             data->origin,
                                             EPHY_PERMISSION_DENY);
  }

  g_object_weak_unref (G_OBJECT (info_bar), (GWeakNotify)form_auth_save_confirmation_info_bar_destroyed_cb, data);
  gtk_widget_destroy (GTK_WIDGET (info_bar));
  form_auth_request_data_free (data);
}

static void
form_auth_data_save_requested (EphyEmbedShell *shell,
                               guint           request_id,
                               guint64         page_id,
                               const char     *origin,
                               const char     *username,
                               EphyWebView    *web_view)
{
  GtkWidget *info_bar;
  FormAuthRequestData *data;

  if (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (web_view)) != page_id)
    return;

  info_bar = ephy_web_view_create_form_auth_save_confirmation_info_bar (web_view, origin, username);
  data = form_auth_request_data_new (web_view, request_id, origin);
  g_signal_connect (info_bar, "response",
                    G_CALLBACK (form_auth_data_save_confirmation_response),
                    data);
  g_object_weak_ref (G_OBJECT (info_bar), (GWeakNotify)form_auth_save_confirmation_info_bar_destroyed_cb, data);

  gtk_widget_show (info_bar);
}

static void
sensitive_form_focused_cb (EphyEmbedShell *shell,
                           guint64         page_id,
                           gboolean        insecure_action,
                           EphyWebView    *web_view)
{
  GtkWidget *info_bar;
  GtkWidget *label;
  GtkWidget *content_area;

  if (web_view->sensitive_form_info_bar)
    return;
  if (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (web_view)) != page_id)
    return;
  if (!insecure_action && ephy_security_level_is_secure (web_view->security_level))
    return;

  /* Translators: Message appears when insecure password form is focused. */
  label = gtk_label_new (_("Heads-up: this form is not secure. If you type your password, it will not be kept private."));
  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
  gtk_widget_show (label);

  info_bar = gtk_info_bar_new ();
  gtk_info_bar_set_message_type (GTK_INFO_BAR (info_bar), GTK_MESSAGE_WARNING);
  gtk_info_bar_set_show_close_button (GTK_INFO_BAR (info_bar), TRUE);
  content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar));
  gtk_container_add (GTK_CONTAINER (content_area), label);

  g_signal_connect (info_bar, "response", G_CALLBACK (gtk_widget_hide), NULL);

  track_info_bar (info_bar, &web_view->sensitive_form_info_bar);

  ephy_embed_add_top_widget (EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (web_view),
                             info_bar,
                             EPHY_EMBED_TOP_WIDGET_POLICY_DESTROY_ON_TRANSITION);
  gtk_widget_show (info_bar);
}

static void
allow_tls_certificate_cb (EphyEmbedShell *shell,
                          guint64         page_id,
                          EphyWebView    *view)
{
  SoupURI *uri;

  if (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (view)) != page_id)
    return;

  g_assert (G_IS_TLS_CERTIFICATE (view->certificate));
  g_assert (view->tls_error_failing_uri != NULL);

  uri = soup_uri_new (view->tls_error_failing_uri);
  webkit_web_context_allow_tls_certificate_for_host (ephy_embed_shell_get_web_context (shell),
                                                     view->certificate,
                                                     uri->host);
  ephy_web_view_load_url (view, ephy_web_view_get_address (view));
  soup_uri_free (uri);
}

static void
allow_unsafe_browsing_cb (EphyEmbedShell *shell,
                          guint64         page_id,
                          EphyWebView    *view)
{
  if (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (view)) != page_id)
    return;

  ephy_web_view_set_should_bypass_safe_browsing (view, TRUE);
  ephy_web_view_load_url (view, ephy_web_view_get_address (view));
}

static void
page_created_cb (EphyEmbedShell        *shell,
                 guint64                page_id,
                 EphyWebExtensionProxy *web_extension,
                 EphyWebView           *view)
{
  if (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (view)) != page_id)
    return;

  view->web_extension = web_extension;
  g_object_add_weak_pointer (G_OBJECT (view->web_extension), (gpointer *)&view->web_extension);

  g_signal_connect_object (shell, "form-auth-data-save-requested",
                           G_CALLBACK (form_auth_data_save_requested),
                           view, 0);

  g_signal_connect_object (shell, "sensitive-form-focused",
                           G_CALLBACK (sensitive_form_focused_cb),
                           view, 0);

  g_signal_connect_object (shell, "allow-tls-certificate",
                           G_CALLBACK (allow_tls_certificate_cb),
                           view, 0);

  g_signal_connect_object (shell, "allow-unsafe-browsing",
                           G_CALLBACK (allow_unsafe_browsing_cb),
                           view, 0);
}

static void
ephy_web_view_dispose (GObject *object)
{
  EphyWebView *view = EPHY_WEB_VIEW (object);

  if (view->web_extension) {
    g_object_remove_weak_pointer (G_OBJECT (view->web_extension), (gpointer *)&view->web_extension);
    view->web_extension = NULL;
  }

  untrack_info_bar (&view->geolocation_info_bar);
  untrack_info_bar (&view->notification_info_bar);
  untrack_info_bar (&view->microphone_info_bar);
  untrack_info_bar (&view->webcam_info_bar);
  untrack_info_bar (&view->password_info_bar);
  untrack_info_bar (&view->sensitive_form_info_bar);

  g_clear_object (&view->file_monitor);

  g_clear_object (&view->icon);

  if (view->history_service_cancellable) {
    g_cancellable_cancel (view->history_service_cancellable);
    g_clear_object (&view->history_service_cancellable);
  }

  if (view->snapshot_timeout_id) {
    g_source_remove (view->snapshot_timeout_id);
    view->snapshot_timeout_id = 0;
  }

  if (view->reader_js_timeout) {
    g_source_remove (view->reader_js_timeout);
    view->reader_js_timeout = 0;
  }

  g_clear_object (&view->certificate);

  G_OBJECT_CLASS (ephy_web_view_parent_class)->dispose (object);
}

static void
ephy_web_view_finalize (GObject *object)
{
  EphyWebView *view = EPHY_WEB_VIEW (object);

  ephy_web_view_popups_manager_reset (view);

  g_free (view->address);
  g_free (view->display_address);
  g_free (view->typed_address);
  g_free (view->last_committed_address);
  g_free (view->link_message);
  g_free (view->loading_message);
  g_free (view->tls_error_failing_uri);
  g_free (view->pending_snapshot_uri);

  g_free (view->reader_content);
  g_free (view->reader_byline);
  g_free (view->reader_url);

  G_OBJECT_CLASS (ephy_web_view_parent_class)->finalize (object);
}

static void
_ephy_web_view_set_is_blank (EphyWebView *view,
                             gboolean     is_blank)
{
  if (view->is_blank != is_blank) {
    view->is_blank = is_blank;
    g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_IS_BLANK]);
  }
}

static
char *readability_get_property_string (WebKitJavascriptResult *js_result,
                                       char                   *property)
{
  JSCValue *jsc_value;
  char *result = NULL;

  jsc_value = webkit_javascript_result_get_js_value (js_result);

  if (!jsc_value_is_object (jsc_value))
    return NULL;

  if (jsc_value_object_has_property (jsc_value, property)) {
    JSCValue *jsc_content = jsc_value_object_get_property (jsc_value, property);

    result = jsc_value_to_string (jsc_content);

    if (result && strcmp (result, "null") == 0)
      g_clear_pointer (&result, g_free);

    g_object_unref (jsc_content);
  }

  return result;
}

static void
readability_js_finish_cb (GObject      *object,
                          GAsyncResult *result,
                          gpointer      user_data)
{
  EphyWebView *view = EPHY_WEB_VIEW (user_data);
  WebKitJavascriptResult *js_result;
  GError *error = NULL;

  js_result = webkit_web_view_run_javascript_finish (WEBKIT_WEB_VIEW (object), result, &error);
  if (!js_result) {
    g_warning ("Error running javascript: %s", error->message);
    g_error_free (error);
    return;
  }

  g_clear_pointer (&view->reader_byline, g_free);
  g_clear_pointer (&view->reader_content, g_free);

  view->reader_byline = readability_get_property_string (js_result, "byline");
  view->reader_content = readability_get_property_string (js_result, "content");
  webkit_javascript_result_unref (js_result);

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_READER_MODE]);
}

static gboolean
run_readability_js_if_needed (gpointer data)
{
  EphyWebView *web_view = data;

  /* Internal pages should never receive reader mode. */
  if (!ephy_embed_utils_is_no_show_address (web_view->address)) {
    webkit_web_view_run_javascript_from_gresource (WEBKIT_WEB_VIEW (web_view),
                                                   "/org/gnome/epiphany/readability.js",
                                                   NULL,
                                                   readability_js_finish_cb,
                                                   web_view);
  }

  web_view->reader_js_timeout = 0;
  return G_SOURCE_REMOVE;
}

static void
title_changed_cb (WebKitWebView *web_view,
                  GParamSpec    *spec,
                  gpointer       data)
{
  const char *uri;
  const char *title;
  char *title_from_address = NULL;
  EphyWebView *webview = EPHY_WEB_VIEW (web_view);
  EphyHistoryService *history = webview->history_service;

  uri = webkit_web_view_get_uri (web_view);
  title = webkit_web_view_get_title (web_view);

  if (!title && uri)
    title = title_from_address = ephy_embed_utils_get_title_from_address (uri);

  if (uri && title && *title && !ephy_web_view_is_history_frozen (webview))
    ephy_history_service_set_url_title (history, uri, title, NULL, NULL, NULL);

  g_free (title_from_address);
}

/*
 * Sets the view location to be address. Note that this function might
 * also set the typed-address property to NULL.
 */
static void
ephy_web_view_set_address (EphyWebView *view,
                           const char  *address)
{
  GObject *object = G_OBJECT (view);
  gboolean was_empty;

  if (g_strcmp0 (view->address, address) == 0)
    return;

  was_empty = view->address == NULL;
  g_free (view->address);
  view->address = g_strdup (address);

  g_free (view->display_address);
  view->display_address = ephy_uri_decode (view->address);

  _ephy_web_view_set_is_blank (view, ephy_embed_utils_url_is_empty (address));

  /* If the view was empty there is no need to clean the typed address. */
  if (!was_empty && ephy_web_view_is_loading (view) && view->typed_address != NULL)
    ephy_web_view_set_typed_address (view, NULL);

  g_object_notify_by_pspec (object, obj_properties[PROP_ADDRESS]);
}

static void
uri_changed_cb (WebKitWebView *web_view,
                GParamSpec    *spec,
                gpointer       data)
{
  ephy_web_view_set_address (EPHY_WEB_VIEW (web_view),
                             webkit_web_view_get_uri (web_view));
}

static void
mouse_target_changed_cb (EphyWebView         *web_view,
                         WebKitHitTestResult *hit_test_result,
                         guint                modifiers,
                         gpointer             data)
{
  const char *message = NULL;

  if (webkit_hit_test_result_context_is_link (hit_test_result))
    message = webkit_hit_test_result_get_link_uri (hit_test_result);

  ephy_web_view_set_link_message (web_view, message);
}

static void
process_terminated_cb (EphyWebView                       *web_view,
                       WebKitWebProcessTerminationReason  reason,
                       gpointer                           user_data)
{
  switch (reason) {
  case WEBKIT_WEB_PROCESS_CRASHED:
    g_warning (_("Web process crashed"));
    break;
  case WEBKIT_WEB_PROCESS_EXCEEDED_MEMORY_LIMIT:
    g_warning (_("Web process terminated due to exceeding memory limit"));
    break;
  }

  if (!ephy_embed_has_load_pending (EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (web_view))) {
    ephy_web_view_load_error_page (web_view, ephy_web_view_get_address (web_view),
                                   EPHY_WEB_VIEW_ERROR_PROCESS_CRASH, NULL, NULL);
  }
}

static void
ephy_web_view_constructed (GObject *object)
{
  EphyWebView *web_view = EPHY_WEB_VIEW (object);

  G_OBJECT_CLASS (ephy_web_view_parent_class)->constructed (object);

  g_signal_emit_by_name (ephy_embed_shell_get_default (), "web-view-created", web_view);

  g_signal_connect (web_view, "web-process-terminated",
                    G_CALLBACK (process_terminated_cb), NULL);
  g_signal_connect_swapped (webkit_web_view_get_back_forward_list (WEBKIT_WEB_VIEW (web_view)),
                            "changed", G_CALLBACK (update_navigation_flags), web_view);
}

static void
ephy_web_view_class_init (EphyWebViewClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

  gobject_class->dispose = ephy_web_view_dispose;
  gobject_class->finalize = ephy_web_view_finalize;
  gobject_class->get_property = ephy_web_view_get_property;
  gobject_class->set_property = ephy_web_view_set_property;
  gobject_class->constructed = ephy_web_view_constructed;

  widget_class->button_press_event = ephy_web_view_button_press_event;
  widget_class->key_press_event = ephy_web_view_key_press_event;

/**
 * EphyWebView:address:
 *
 * View's current address. This is a percent-encoded URI.
 **/
  obj_properties[PROP_ADDRESS] =
    g_param_spec_string ("address",
                         "Address",
                         "The view's address",
                         "",
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:typed-address:
 *
 * User typed address for the current view.
 **/
  obj_properties[PROP_TYPED_ADDRESS] =
    g_param_spec_string ("typed-address",
                         "Typed Address",
                         "The typed address",
                         "",
                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:security-level:
 *
 * One of #EphySecurityLevel, determining view's current security level.
 **/
  obj_properties[PROP_SECURITY] =
    g_param_spec_enum ("security-level",
                       "Security Level",
                       "The view's security level",
                       EPHY_TYPE_SECURITY_LEVEL,
                       EPHY_SECURITY_LEVEL_TO_BE_DETERMINED,
                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:document-type:
 *
 * Document type determined for the view.
 **/
  obj_properties[PROP_DOCUMENT_TYPE] =
    g_param_spec_enum ("document-type",
                       "Document Type",
                       "The view's document type",
                       EPHY_TYPE_WEB_VIEW_DOCUMENT_TYPE,
                       EPHY_WEB_VIEW_DOCUMENT_HTML,
                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:navigation:
 *
 * View's navigation flags as #EphyWebViewNavigationFlags.
 **/
  obj_properties[PROP_NAVIGATION] =
    g_param_spec_flags ("navigation",
                        "Navigation flags",
                        "The view's navigation flags",
                        EPHY_TYPE_WEB_VIEW_NAVIGATION_FLAGS,
                        0,
                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:status-message:
 *
 * Statusbar message corresponding to this view.
 **/
  obj_properties[PROP_STATUS_MESSAGE] =
    g_param_spec_string ("status-message",
                         "Status Message",
                         "The view's statusbar message",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:link-message:
 *
 * ???
 **/
  obj_properties[PROP_LINK_MESSAGE] =
    g_param_spec_string ("link-message",
                         "Link Message",
                         "The view's link message",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:icon:
 *
 * View's favicon set by the loaded site.
 **/
  obj_properties[PROP_ICON] =
    g_param_spec_object ("icon",
                         "Icon",
                         "The view icon's",
                         GDK_TYPE_PIXBUF,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:hidden-popup-count:
 *
 * Number of hidden (blocked) popup windows.
 **/
  obj_properties[PROP_HIDDEN_POPUP_COUNT] =
    g_param_spec_int ("hidden-popup-count",
                      "Number of Blocked Popups",
                      "The view's number of blocked popup windows",
                      0,
                      G_MAXINT,
                      0,
                      G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:popups-allowed:
 *
 * If popup windows from this view are to be displayed.
 **/
  obj_properties[PROP_POPUPS_ALLOWED] =
    g_param_spec_boolean ("popups-allowed",
                          "Popups Allowed",
                          "Whether popup windows are to be displayed",
                          FALSE,
                          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:is-blank:
 *
 * Whether the view is showing the blank address.
 **/
  obj_properties[PROP_IS_BLANK] =
    g_param_spec_boolean ("is-blank",
                          "Is blank",
                          "If the EphyWebView is blank",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

/**
 * EphyWebView:reader-mode:
 *
 * Whether the view is in reader mode.
 **/
  obj_properties[PROP_READER_MODE] =
    g_param_spec_boolean ("reader-mode",
                          "Reader mode",
                          "If the EphyWebView is in reader mode",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

  g_object_class_install_properties (gobject_class, LAST_PROP, obj_properties);

/**
 * EphyWebView::new-window:
 * @view: the #EphyWebView that received the signal
 * @new_view: the newly opened #EphyWebView
 *
 * The ::new-window signal is emitted after a new window has been opened by
 * the view. For example, when a JavaScript popup window is opened.
 **/
  g_signal_new ("new-window",
                EPHY_TYPE_WEB_VIEW,
                G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST,
                0, NULL, NULL, NULL,
                G_TYPE_NONE,
                1,
                GTK_TYPE_WIDGET);

/**
 * EphyWebView::search-key-press:
 * @view: the #EphyWebView that received the signal
 * @event: the #GdkEventKey which triggered this signal
 *
 * The ::search-key-press signal is emitted for keypresses which
 * should be used for find implementations.
 **/
  g_signal_new ("search-key-press",
                EPHY_TYPE_WEB_VIEW,
                G_SIGNAL_RUN_LAST,
                0, g_signal_accumulator_true_handled, NULL, NULL,
                G_TYPE_BOOLEAN,
                1,
                GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);

/**
 * EphyWebView::download-only-load:
 * @view: the #EphyWebView that received the signal
 *
 * The ::download-only-load signal is emitted when the @view has its main load
 * replaced by a download, and that is the only reason why the @view has been created.
 **/
  g_signal_new ("download-only-load",
                EPHY_TYPE_WEB_VIEW,
                G_SIGNAL_RUN_FIRST,
                0, NULL, NULL, NULL,
                G_TYPE_NONE,
                0);
}

static void
new_window_cb (EphyWebView *view,
               EphyWebView *new_view,
               gpointer     user_data)
{
  EphyEmbedContainer *container;

  g_assert (new_view != NULL);

  container = EPHY_EMBED_CONTAINER (gtk_widget_get_toplevel (GTK_WIDGET (new_view)));
  g_assert (container != NULL || !gtk_widget_is_toplevel (GTK_WIDGET (container)));

  popups_manager_add_window (view, container);
}

static gboolean
decide_policy_cb (WebKitWebView           *web_view,
                  WebKitPolicyDecision    *decision,
                  WebKitPolicyDecisionType decision_type,
                  gpointer                 user_data)
{
  WebKitResponsePolicyDecision *response_decision;
  WebKitURIResponse *response;
  WebKitURIRequest *request;
  WebKitWebResource *main_resource;
  EphyWebViewDocumentType type;
  const char *mime_type;
  const char *request_uri;

  if (decision_type != WEBKIT_POLICY_DECISION_TYPE_RESPONSE)
    return FALSE;

  response_decision = WEBKIT_RESPONSE_POLICY_DECISION (decision);
  response = webkit_response_policy_decision_get_response (response_decision);
  mime_type = webkit_uri_response_get_mime_type (response);

  /* If WebKit can't handle the mime type start the download
     process */
  if (webkit_response_policy_decision_is_mime_type_supported (response_decision))
    return FALSE;

  /* If it's not the main resource we don't need to set the document type. */
  request = webkit_response_policy_decision_get_request (response_decision);
  request_uri = webkit_uri_request_get_uri (request);
  main_resource = webkit_web_view_get_main_resource (web_view);
  if (g_strcmp0 (webkit_web_resource_get_uri (main_resource), request_uri) != 0)
    return FALSE;

  type = EPHY_WEB_VIEW_DOCUMENT_OTHER;
  if (!strcmp (mime_type, "text/html") || !strcmp (mime_type, "text/plain"))
    type = EPHY_WEB_VIEW_DOCUMENT_HTML;
  else if (!strcmp (mime_type, "application/xhtml+xml"))
    type = EPHY_WEB_VIEW_DOCUMENT_XML;
  else if (!strncmp (mime_type, "image/", 6))
    type = EPHY_WEB_VIEW_DOCUMENT_IMAGE;

  /* FIXME: maybe it makes more sense to have an API to query the mime
   * type when the load of a page starts than doing this here.
   */
  if (EPHY_WEB_VIEW (web_view)->document_type != type) {
    EPHY_WEB_VIEW (web_view)->document_type = type;

    g_object_notify_by_pspec (G_OBJECT (web_view), obj_properties[PROP_DOCUMENT_TYPE]);
  }

  webkit_policy_decision_download (decision);

  return TRUE;
}

typedef struct {
  EphyWebView *web_view;
  WebKitPermissionRequest *request;
  char *origin;
} PermissionRequestData;

static PermissionRequestData *
permission_request_data_new (EphyWebView             *web_view,
                             WebKitPermissionRequest *request,
                             const char              *origin)
{
  PermissionRequestData *data;
  data = g_slice_new (PermissionRequestData);
  data->web_view = web_view;
  /* Ref the decision to keep it alive while we decide */
  data->request = g_object_ref (request);
  data->origin = g_strdup (origin);
  return data;
}

static void
permission_request_data_free (PermissionRequestData *data)
{
  g_object_unref (data->request);
  g_free (data->origin);
  g_slice_free (PermissionRequestData, data);
}

static void
permission_request_info_bar_destroyed_cb (PermissionRequestData *data,
                                          GObject               *where_the_info_bar_was)
{
  webkit_permission_request_deny (data->request);
  permission_request_data_free (data);
}

static void
decide_on_permission_request (GtkWidget               *info_bar,
                              int                      response,
                              PermissionRequestData   *data)
{
  const char *address;
  EphyPermissionType permission_type;

  switch (response) {
    case GTK_RESPONSE_YES:
      webkit_permission_request_allow (data->request);
      break;
    default:
      webkit_permission_request_deny (data->request);
      break;
  }

  if (WEBKIT_IS_GEOLOCATION_PERMISSION_REQUEST (data->request)) {
    permission_type = EPHY_PERMISSION_TYPE_ACCESS_LOCATION;
  } else if (WEBKIT_IS_NOTIFICATION_PERMISSION_REQUEST (data->request)) {
    permission_type = EPHY_PERMISSION_TYPE_SHOW_NOTIFICATIONS;
  } else if (WEBKIT_IS_USER_MEDIA_PERMISSION_REQUEST (data->request)) {
    if (webkit_user_media_permission_is_for_video_device (WEBKIT_USER_MEDIA_PERMISSION_REQUEST (data->request)))
      permission_type = EPHY_PERMISSION_TYPE_ACCESS_WEBCAM;
    else
      permission_type = EPHY_PERMISSION_TYPE_ACCESS_MICROPHONE;
  } else {
    g_assert_not_reached ();
  }

  address = ephy_web_view_get_address (data->web_view);

  if (response != GTK_RESPONSE_NONE && ephy_embed_utils_address_has_web_scheme (address)) {
    EphyEmbedShell *shell;
    EphyPermissionsManager *permissions_manager;

    shell = ephy_embed_shell_get_default ();
    permissions_manager = ephy_embed_shell_get_permissions_manager (shell);

    ephy_permissions_manager_set_permission (permissions_manager,
                                             permission_type,
                                             data->origin,
                                             response == GTK_RESPONSE_YES ? EPHY_PERMISSION_PERMIT
                                                                          : EPHY_PERMISSION_DENY);
  }

  g_object_weak_unref (G_OBJECT (info_bar), (GWeakNotify)permission_request_info_bar_destroyed_cb, data);
  gtk_widget_destroy (info_bar);
  permission_request_data_free (data);
}

static void
show_permission_request_info_bar (WebKitWebView           *web_view,
                                  WebKitPermissionRequest *decision,
                                  EphyPermissionType       permission_type)
{
  PermissionRequestData *data;
  GtkWidget *info_bar;
  GtkWidget *action_area;
  GtkWidget *content_area;
  GtkWidget *label;
  char *message;
  char *origin;
  char *bold_origin;

  info_bar = gtk_info_bar_new_with_buttons (_("Deny"), GTK_RESPONSE_NO,
                                            _("Allow"), GTK_RESPONSE_YES,
                                            NULL);

  action_area = gtk_info_bar_get_action_area (GTK_INFO_BAR (info_bar));
  gtk_orientable_set_orientation (GTK_ORIENTABLE (action_area),
                                  GTK_ORIENTATION_HORIZONTAL);

  /* Label */
  origin = ephy_uri_to_security_origin (webkit_web_view_get_uri (web_view));
  if (origin == NULL)
    return;

  bold_origin = g_markup_printf_escaped ("<b>%s</b>", origin);

  switch (permission_type) {
  case EPHY_PERMISSION_TYPE_SHOW_NOTIFICATIONS:
    /* Translators: Notification policy for a specific site. */
    message = g_strdup_printf (_("The page at %s wants to show desktop notifications."),
                               bold_origin);
    break;
  case EPHY_PERMISSION_TYPE_ACCESS_LOCATION:
    /* Translators: Geolocation policy for a specific site. */
    message = g_strdup_printf (_("The page at %s wants to know your location."),
                               bold_origin);
    break;
  case EPHY_PERMISSION_TYPE_ACCESS_MICROPHONE:
    /* Translators: Microphone policy for a specific site. */
    message = g_strdup_printf (_("The page at %s wants to use your microphone."),
                               bold_origin);
    break;
  case EPHY_PERMISSION_TYPE_ACCESS_WEBCAM:
    /* Translators: Webcam policy for a specific site. */
    message = g_strdup_printf (_("The page at %s wants to use your webcam."),
                               bold_origin);
    break;
  case EPHY_PERMISSION_TYPE_SAVE_PASSWORD:
  default:
    g_assert_not_reached ();
  }

  label = gtk_label_new (NULL);
  gtk_label_set_markup (GTK_LABEL (label), message);
  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);

  content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar));
  gtk_container_add (GTK_CONTAINER (content_area), label);

  gtk_widget_show_all (info_bar);

  data = permission_request_data_new (EPHY_WEB_VIEW (web_view), decision, origin);

  g_signal_connect (info_bar, "response",
                    G_CALLBACK (decide_on_permission_request),
                    data);
  g_object_weak_ref (G_OBJECT (info_bar), (GWeakNotify)permission_request_info_bar_destroyed_cb, data);

  switch (permission_type) {
  case EPHY_PERMISSION_TYPE_SHOW_NOTIFICATIONS:
    track_info_bar (info_bar, &EPHY_WEB_VIEW (web_view)->notification_info_bar);
    break;
  case EPHY_PERMISSION_TYPE_ACCESS_LOCATION:
    track_info_bar (info_bar, &EPHY_WEB_VIEW (web_view)->geolocation_info_bar);
    break;
  case EPHY_PERMISSION_TYPE_ACCESS_MICROPHONE:
    track_info_bar (info_bar, &EPHY_WEB_VIEW (web_view)->microphone_info_bar);
    break;
  case EPHY_PERMISSION_TYPE_ACCESS_WEBCAM:
    track_info_bar (info_bar, &EPHY_WEB_VIEW (web_view)->webcam_info_bar);
    break;
  case EPHY_PERMISSION_TYPE_SAVE_PASSWORD:
  default:
    g_assert_not_reached ();
  }

  ephy_embed_add_top_widget (EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (web_view),
                             info_bar,
                             EPHY_EMBED_TOP_WIDGET_POLICY_DESTROY_ON_TRANSITION);

  g_free (message);
  g_free (origin);
  g_free (bold_origin);
}

static gboolean
permission_request_cb (WebKitWebView           *web_view,
                       WebKitPermissionRequest *decision)
{
  const char *address;
  char *origin;
  EphyEmbedShell *shell;
  EphyPermissionsManager *permissions_manager;
  EphyPermission permission;
  EphyPermissionType permission_type;

  shell = ephy_embed_shell_get_default ();

  if (WEBKIT_IS_GEOLOCATION_PERMISSION_REQUEST (decision)) {
    permission_type = EPHY_PERMISSION_TYPE_ACCESS_LOCATION;
  } else if (WEBKIT_IS_NOTIFICATION_PERMISSION_REQUEST (decision)) {
    permission_type = EPHY_PERMISSION_TYPE_SHOW_NOTIFICATIONS;
  } else if (WEBKIT_IS_USER_MEDIA_PERMISSION_REQUEST (decision)) {
    if (webkit_user_media_permission_is_for_video_device (WEBKIT_USER_MEDIA_PERMISSION_REQUEST (decision)))
      permission_type = EPHY_PERMISSION_TYPE_ACCESS_WEBCAM;
    else
      permission_type = EPHY_PERMISSION_TYPE_ACCESS_MICROPHONE;
  } else {
    return FALSE;
  }

  address = ephy_web_view_get_address (EPHY_WEB_VIEW (web_view));
  origin = ephy_uri_to_security_origin (address);
  if (origin == NULL)
    return FALSE;

  permissions_manager = ephy_embed_shell_get_permissions_manager (ephy_embed_shell_get_default ());
  permission = ephy_permissions_manager_get_permission (permissions_manager,
                                                        permission_type,
                                                        origin);

  switch (permission) {
  case EPHY_PERMISSION_PERMIT:
    webkit_permission_request_allow (decision);
    goto out;
  case EPHY_PERMISSION_DENY:
    webkit_permission_request_deny (decision);
    goto out;
  case EPHY_PERMISSION_UNDECIDED:
    /* Application mode implies being OK with notifications. */
    if (permission_type == EPHY_PERMISSION_TYPE_SHOW_NOTIFICATIONS &&
        ephy_embed_shell_get_mode (shell) == EPHY_EMBED_SHELL_MODE_APPLICATION) {
      ephy_permissions_manager_set_permission (permissions_manager,
                                               permission_type,
                                               origin,
                                               EPHY_PERMISSION_PERMIT);
      webkit_permission_request_allow (decision);
    } else {
      show_permission_request_info_bar (web_view, decision, permission_type);
    }
  }

out:
  g_free (origin);

  return TRUE;
}

static void
get_host_for_url_cb (gpointer service,
                     gboolean success,
                     gpointer result_data,
                     gpointer user_data)
{
  EphyHistoryHost *host;
  EphyWebView *view;
  double current_zoom;
  double set_zoom;

  if (success == FALSE)
    return;

  view = EPHY_WEB_VIEW (user_data);
  host = (EphyHistoryHost *)result_data;

  current_zoom = webkit_web_view_get_zoom_level (WEBKIT_WEB_VIEW (view));

  if (host->visit_count == 0) {
    set_zoom = g_settings_get_double (EPHY_SETTINGS_WEB, EPHY_PREFS_WEB_DEFAULT_ZOOM_LEVEL);
  } else {
    set_zoom = host->zoom_level;
  }

  if (set_zoom != current_zoom) {
    view->is_setting_zoom = TRUE;
    webkit_web_view_set_zoom_level (WEBKIT_WEB_VIEW (view), set_zoom);
    view->is_setting_zoom = FALSE;
  }

  ephy_history_host_free (host);
}

static void
restore_zoom_level (EphyWebView *view,
                    const char  *address)
{
  if (ephy_embed_utils_address_has_web_scheme (address))
    ephy_history_service_get_host_for_url (view->history_service,
                                           address, view->history_service_cancellable,
                                           (EphyHistoryJobCallback)get_host_for_url_cb, view);
}

/**
 * ephy_web_view_set_loading_message:
 * @view: an #EphyWebView
 * @address: the loading address
 *
 * Update @view's loading message
 **/
static void
ephy_web_view_set_loading_message (EphyWebView *view,
                                   const char  *address)
{
  g_clear_pointer (&view->loading_message, g_free);
  if (address) {
    char *decoded_address;
    char *title;

    decoded_address = ephy_uri_decode (address);
    title = ephy_embed_utils_get_title_from_address (decoded_address);

    if (title != NULL && title[0] != '\0') {
      /* translators: %s here is the address of the web page */
      view->loading_message = g_strdup_printf (_("Loading “%s”…"), title);
    } else {
      view->loading_message = g_strdup (_("Loading…"));
    }

    g_free (decoded_address);
    g_free (title);
  }

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_STATUS_MESSAGE]);
}

static void
ephy_web_view_set_committed_location (EphyWebView *view,
                                      const char  *location)
{
  GObject *object = G_OBJECT (view);

  g_object_freeze_notify (object);

  /* Do this up here so we still have the old address around. */
  ephy_file_monitor_update_location (view->file_monitor, location);

  if (location == NULL || location[0] == '\0') {
    ephy_web_view_set_address (view, NULL);
  } else if (g_str_has_prefix (location, EPHY_ABOUT_SCHEME ":applications")) {
    SoupURI *uri = soup_uri_new (location);
    char *new_address;

    /* Strip the query from the URL for about:applications. */
    soup_uri_set_query (uri, NULL);
    new_address = soup_uri_to_string (uri, FALSE);
    soup_uri_free (uri);

    ephy_web_view_set_address (view, new_address);
    g_free (new_address);
  } else {
    /* We do this to get rid of an eventual password in the URL. */
    ephy_web_view_set_address (view, location);
    ephy_web_view_set_loading_message (view, location);
  }

  g_clear_pointer (&view->last_committed_address, g_free);
  view->last_committed_address = g_strdup (view->address);

  ephy_web_view_set_link_message (view, NULL);

  _ephy_web_view_update_icon (view);

  g_object_thaw_notify (object);
}

static void
update_security_status_for_committed_load (EphyWebView *view,
                                           const char  *uri)
{
  EphySecurityLevel security_level = EPHY_SECURITY_LEVEL_NO_SECURITY;
  EphyEmbed *embed = NULL;
  GtkWidget *toplevel;
  WebKitWebContext *web_context;
  WebKitSecurityManager *security_manager;
  SoupURI *soup_uri;

  if (view->loading_error_page)
    return;

  toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
  if (EPHY_IS_EMBED_CONTAINER (toplevel))
    embed = EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (view);
  web_context = webkit_web_view_get_context (WEBKIT_WEB_VIEW (view));
  security_manager = webkit_web_context_get_security_manager (web_context);
  soup_uri = soup_uri_new (uri);

  g_clear_object (&view->certificate);
  g_clear_pointer (&view->tls_error_failing_uri, g_free);

  if (!soup_uri ||
      strcmp (soup_uri_get_scheme (soup_uri), EPHY_VIEW_SOURCE_SCHEME) == 0 ||
      webkit_security_manager_uri_scheme_is_local (security_manager, soup_uri->scheme) ||
      webkit_security_manager_uri_scheme_is_empty_document (security_manager, soup_uri->scheme)) {
    security_level = EPHY_SECURITY_LEVEL_LOCAL_PAGE;
  } else if (webkit_web_view_get_tls_info (WEBKIT_WEB_VIEW (view), &view->certificate, &view->tls_errors)) {
    g_object_ref (view->certificate);
    security_level = view->tls_errors == 0 ?
                     EPHY_SECURITY_LEVEL_STRONG_SECURITY : EPHY_SECURITY_LEVEL_UNACCEPTABLE_CERTIFICATE;
  } else if (!embed || ephy_embed_has_load_pending (embed)) {
    security_level = EPHY_SECURITY_LEVEL_TO_BE_DETERMINED;
  }

  ephy_web_view_set_security_level (view, security_level);

  if (soup_uri)
    soup_uri_free (soup_uri);
}

static void
load_changed_cb (WebKitWebView  *web_view,
                 WebKitLoadEvent load_event,
                 gpointer        user_data)
{
  EphyWebView *view = EPHY_WEB_VIEW (web_view);
  GObject *object = G_OBJECT (web_view);

  g_object_freeze_notify (object);

  switch (load_event) {
    case WEBKIT_LOAD_STARTED: {
      const char *loading_uri = NULL;

      view->load_failed = FALSE;

      if (view->snapshot_timeout_id) {
        g_source_remove (view->snapshot_timeout_id);
        view->snapshot_timeout_id = 0;
      }

      loading_uri = webkit_web_view_get_uri (web_view);

      if (ephy_embed_utils_is_no_show_address (loading_uri))
        ephy_web_view_freeze_history (view);

      if (view->address == NULL || view->address[0] == '\0')
        ephy_web_view_set_address (view, loading_uri);

      ephy_web_view_set_loading_message (view, loading_uri);


      if (!view->reader_loading) {
        g_clear_pointer (&view->reader_byline, g_free);
        g_clear_pointer (&view->reader_content, g_free);
        view->reader_active = FALSE;
      }

      g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_READER_MODE]);

      break;
    }
    case WEBKIT_LOAD_REDIRECTED:
      break;
    case WEBKIT_LOAD_COMMITTED: {
      const char *uri;
      view->ever_committed = TRUE;

      /* Title and location. */
      uri = webkit_web_view_get_uri (web_view);
      ephy_web_view_set_committed_location (view, uri);
      update_security_status_for_committed_load (view, uri);

      /* History. */
      if (!ephy_web_view_is_history_frozen (view)) {
        char *history_uri = NULL;

        /* TODO: move the normalization down to the history service? */
        if (g_str_has_prefix (uri, EPHY_ABOUT_SCHEME))
          history_uri = g_strdup_printf ("about:%s", uri + EPHY_ABOUT_SCHEME_LEN + 1);
        else
          history_uri = g_strdup (uri);

        ephy_history_service_visit_url (view->history_service,
                                        history_uri,
                                        NULL,
                                        g_get_real_time (),
                                        view->visit_type,
                                        TRUE);

        g_free (history_uri);
      }

      if (view->loading_error_page)
        view->loading_error_page = FALSE;
      else
        view->error_page = EPHY_WEB_VIEW_ERROR_PAGE_NONE;

      /* Zoom level. */
      restore_zoom_level (view, uri);

      /* Reset reader content */
      if (!view->reader_active)
        g_clear_pointer (&view->reader_content, g_free);

      break;
    }
    case WEBKIT_LOAD_FINISHED:
      ephy_web_view_set_loading_message (view, NULL);

      /* Ensure we load the icon for this web view, if available. */
      _ephy_web_view_update_icon (view);

      /* Reset visit type. */
      view->visit_type = EPHY_PAGE_VISIT_NONE;

      if (!ephy_web_view_is_history_frozen (view) &&
          ephy_embed_shell_get_mode (ephy_embed_shell_get_default ()) != EPHY_EMBED_SHELL_MODE_INCOGNITO) {
        /* FIXME: The 1s delay is a workaround to allow time to render the page and get a favicon.
         * https://bugzilla.gnome.org/show_bug.cgi?id=761065
         * https://bugs.webkit.org/show_bug.cgi?id=164180
         */
        if (view->snapshot_timeout_id == 0) {
          view->snapshot_timeout_id = g_timeout_add_seconds_full (G_PRIORITY_LOW, 1,
                                                                  (GSourceFunc)maybe_take_snapshot,
                                                                  web_view, NULL);
          g_free (view->pending_snapshot_uri);
          view->pending_snapshot_uri = g_strdup (webkit_web_view_get_uri (WEBKIT_WEB_VIEW (view)));
        }
      }

      ephy_web_view_thaw_history (view);

      if (view->reader_js_timeout) {
        g_source_remove (view->reader_js_timeout);
        view->reader_js_timeout = 0;
      }

      view->reader_loading = FALSE;
      if (!view->reader_active)
        view->reader_js_timeout = g_idle_add (run_readability_js_if_needed, web_view);

      break;

    default:
      break;
  }

  g_object_thaw_notify (object);
}

/**
 * ephy_web_view_set_placeholder:
 * @view: an #EphyWebView
 * @uri: uri that will eventually be loaded
 * @title: last-known title of the page that will eventually be loaded
 *
 * Makes the #EphyWebView pretend a page that will eventually be loaded is
 * already there.
 *
 **/
void
ephy_web_view_set_placeholder (EphyWebView *view,
                               const char  *uri,
                               const char  *title)
{
  char *html;

  g_assert (EPHY_IS_WEB_VIEW (view));

  /* We want only the actual load to be the one recorded in history, but
   * doing a load here is the simplest way to replace the loading
   * spinner with the favicon. */
  ephy_web_view_freeze_history (view);

  html = g_markup_printf_escaped ("<head><title>%s</title></head>", title);

  webkit_web_view_load_alternate_html (WEBKIT_WEB_VIEW (view), html, uri, NULL);

  g_free (html);

  ephy_web_view_set_address (view, uri);
}


static char *
get_style_sheet (void)
{
  GBytes *bytes;
  char *sheet;

  bytes = g_resources_lookup_data (EPHY_PAGE_TEMPLATE_ERROR_CSS, 0, NULL);
  sheet = g_strdup (g_bytes_get_data (bytes, NULL));
  g_bytes_unref (bytes);

  return sheet;
}

static char *
detailed_message_from_tls_errors (GTlsCertificateFlags tls_errors)
{
  GPtrArray *errors = g_ptr_array_new ();
  char *retval;

  if (tls_errors & G_TLS_CERTIFICATE_BAD_IDENTITY) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website presented identification that belongs to a different website."));
  }

  if (tls_errors & G_TLS_CERTIFICATE_EXPIRED) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website’s identification is too old to trust. Check the date on your computer’s calendar."));
  }

  if (tls_errors & G_TLS_CERTIFICATE_UNKNOWN_CA) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website’s identification was not issued by a trusted organization."));
  }

  if (tls_errors & G_TLS_CERTIFICATE_GENERIC_ERROR) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website’s identification could not be processed. It may be corrupted."));
  }

  if (tls_errors & G_TLS_CERTIFICATE_REVOKED) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website’s identification has been revoked by the trusted organization that issued it."));
  }

  if (tls_errors & G_TLS_CERTIFICATE_INSECURE) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website’s identification cannot be trusted because it uses very weak encryption."));
  }

  if (tls_errors & G_TLS_CERTIFICATE_NOT_ACTIVATED) {
    /* Possible error message when a site presents a bad certificate. */
    g_ptr_array_add (errors, _("This website’s identification is only valid for future dates. Check the date on your computer’s calendar."));
  }

  if (errors->len == 1) {
    retval = g_strdup (g_ptr_array_index (errors, 0));
  } else if (errors->len > 1) {
    GString *message = g_string_new ("<ul>");
    guint i;

    for (i = 0; i < errors->len; i++) {
      g_string_append_printf (message, "<li>%s</li>", (char *)g_ptr_array_index (errors, i));
    }

    g_string_append (message, "</ul>");
    retval = g_string_free (message, FALSE);
  } else {
    g_assert_not_reached ();
  }

  g_ptr_array_free (errors, TRUE);

  return retval;
}

/**
 * ephy_web_view_get_error_page:
 * @view: an #EphyWebView
 *
 * Returns the error page currently displayed, or
 * %EPHY_WEB_VIEW_ERROR_PAGE_NONE.
 *
 **/
EphyWebViewErrorPage
ephy_web_view_get_error_page (EphyWebView *view)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  return view->error_page;
}

/* Note we go to some effort to avoid error-prone markup in translatable
 * strings. Everywhere, but also here on the error pages in particular. */

static void
format_network_error_page (const char  *uri,
                           const char  *origin,
                           const char  *reason,
                           char       **page_title,
                           char       **message_title,
                           char       **message_body,
                           char       **message_details,
                           char       **button_label,
                           char       **button_action,
                           const char **button_accesskey,
                           const char **icon_name,
                           const char **style)
{
  char *formatted_origin;
  char *formatted_reason;
  char *first_paragraph;
  const char *second_paragraph;

  /* Page title when a site cannot be loaded due to a network error. */
  *page_title = g_strdup_printf (_("Problem Loading Page"));

  /* Message title when a site cannot be loaded due to a network error. */
  *message_title = g_strdup (_("Unable to display this website"));

  formatted_origin = g_strdup_printf ("<strong>%s</strong>", origin);
  /* Error details when a site cannot be loaded due to a network error. */
  first_paragraph = g_strdup_printf (_("The site at %s seems to be "
                                       "unavailable."),
                                     formatted_origin);
  /* Further error details when a site cannot be loaded due to a network error. */
  second_paragraph = _("It may be temporarily inaccessible or moved to a new "
                       "address. You may wish to verify that your internet "
                       "connection is working correctly.");
  *message_body = g_strdup_printf ("<p>%s</p><p>%s</p>",
                                   first_paragraph,
                                   second_paragraph);

  formatted_reason = g_strdup_printf ("<i>%s</i>", reason);
  g_free (first_paragraph);
  /* Technical details when a site cannot be loaded due to a network error. */
  first_paragraph = g_strdup_printf (_("The precise error was: %s"),
                                      formatted_reason);
  *message_details = g_strdup_printf ("<p>%s</p>", first_paragraph);

  /* The button on the network error page. DO NOT ADD MNEMONICS HERE. */
  *button_label = g_strdup (_("Reload"));
  *button_action = g_strdup_printf ("window.location = '%s';", uri);
  /* Mnemonic for the Reload button on browser error pages. */
  *button_accesskey = C_("reload-access-key", "R");

  *icon_name = "network-error-symbolic.png";
  *style = "default";

  g_free (formatted_origin);
  g_free (formatted_reason);
  g_free (first_paragraph);
}

static void
format_crash_error_page (const char  *uri,
                         char       **page_title,
                         char       **message_title,
                         char       **message_body,
                         char       **button_label,
                         char       **button_action,
                         const char **button_accesskey,
                         const char **icon_name,
                         const char **style)
{
  char *formatted_uri;
  char *formatted_distributor;
  char *first_paragraph;
  char *second_paragraph;

  /* Page title when a site cannot be loaded due to a page crash error. */
  *page_title = g_strdup_printf (_("Problem Loading Page"));

  /* Message title when a site cannot be loaded due to a page crash error. */
  *message_title = g_strdup (_("Oops! There may be a problem"));

  formatted_uri = g_strdup_printf ("<strong>%s</strong>", uri);
  /* Error details when a site cannot be loaded due to a page crash error. */
  first_paragraph = g_strdup_printf (_("The page %s may have caused Web to "
                                       "close unexpectedly."),
                                     formatted_uri);

  formatted_distributor = g_strdup_printf ("<strong>%s</strong>",
                                           DISTRIBUTOR_NAME);
  /* Further error details when a site cannot be loaded due to a page crash error. */
  second_paragraph = g_strdup_printf (_("If this happens again, please report "
                                        "the problem to the %s developers."),
                                      formatted_distributor);

  *message_body = g_strdup_printf ("<p>%s</p><p>%s</p>",
                                   first_paragraph,
                                   second_paragraph);

  /* The button on the page crash error page. DO NOT ADD MNEMONICS HERE. */
  *button_label = g_strdup (_("Reload"));
  *button_action = g_strdup_printf ("window.location = '%s';", uri);
  /* Mnemonic for the Reload button on browser error pages. */
  *button_accesskey = C_("reload-access-key", "R");

  *icon_name = "computer-fail-symbolic.png";
  *style = "default";

  g_free (formatted_uri);
  g_free (formatted_distributor);
  g_free (first_paragraph);
  g_free (second_paragraph);
}

static void
format_process_crash_error_page (const char  *uri,
                                 char       **page_title,
                                 char       **message_title,
                                 char       **message_body,
                                 char       **button_label,
                                 char       **button_action,
                                 const char **button_accesskey,
                                 const char **icon_name,
                                 const char **style)
{
  const char *first_paragraph;
  const char *second_paragraph;

  /* Page title when a site cannot be loaded due to a process crash error. */
  *page_title = g_strdup_printf (_("Problem Displaying Page"));

  /* Message title when a site cannot be loaded due to a process crash error. */
  *message_title = g_strdup (_("Oops!"));

  /* Error details when a site cannot be loaded due to a process crash error. */
  first_paragraph = _("Something went wrong while displaying this page.");
  /* Further error details when a site cannot be loaded due to a process crash error. */
  second_paragraph = _("Please reload or visit a different page to continue.");
  *message_body = g_strdup_printf ("<p>%s</p><p>%s</p>",
                                   first_paragraph,
                                   second_paragraph);

  /* The button on the process crash error page. DO NOT ADD MNEMONICS HERE. */
  *button_label = g_strdup (_("Reload"));
  *button_action = g_strdup_printf ("window.location = '%s';", uri);
  /* Mnemonic for the Reload button on browser error pages. */
  *button_accesskey = C_("reload-access-key", "R");

  *icon_name = "computer-fail-symbolic.png";
  *style = "default";
}

static void
format_tls_error_page (EphyWebView *view,
                       const char  *origin,
                       char       **page_title,
                       char       **message_title,
                       char       **message_body,
                       char       **message_details,
                       char       **button_label,
                       char       **button_action,
                       const char **button_accesskey,
                       char       **hidden_button_label,
                       char       **hidden_button_action,
                       const char **hidden_button_accesskey,
                       const char **icon_name,
                       const char **style)
{
  char *formatted_origin;
  char *first_paragraph;

  /* Page title when a site is not loaded due to an invalid TLS certificate. */
  *page_title = g_strdup_printf (_("Security Violation"));

  /* Message title when a site is not loaded due to an invalid TLS certificate. */
  *message_title = g_strdup (_("This Connection is Not Secure"));

  formatted_origin = g_strdup_printf ("<strong>%s</strong>", origin);
  /* Error details when a site is not loaded due to an invalid TLS certificate. */
  first_paragraph = g_strdup_printf (_("This does not look like the real %s. "
                                       "Attackers might be trying to steal or "
                                       "alter information going to or from "
                                       "this site."),
                                     formatted_origin);

  *message_body = g_strdup_printf ("<p>%s</p>", first_paragraph);
  *message_details = detailed_message_from_tls_errors (view->tls_errors);

  /* The button on the invalid TLS certificate error page. DO NOT ADD MNEMONICS HERE. */
  *button_label = g_strdup (_("Go Back"));
  *button_action = g_strdup ("window.history.back();");
  /* Mnemonic for the Go Back button on the invalid TLS certificate error page. */
  *button_accesskey = C_("back-access-key", "B");

  /* The hidden button on the invalid TLS certificate error page. Do not add mnemonics here. */
  *hidden_button_label = g_strdup (_("Accept Risk and Proceed"));
  *hidden_button_action = g_strdup_printf ("window.webkit.messageHandlers.tlsErrorPage.postMessage(%"G_GUINT64_FORMAT ");",
                                          webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (view)));
  /* Mnemonic for the Accept Risk and Proceed button on the invalid TLS certificate error page. */
  *hidden_button_accesskey = C_("proceed-anyway-access-key", "P");

  *icon_name = "channel-insecure-symbolic.png";
  *style = "danger";

  g_free (formatted_origin);
  g_free (first_paragraph);
}

static void
format_unsafe_browsing_error_page (EphyWebView *view,
                                   const char  *origin,
                                   const char  *threat_type,
                                   char       **page_title,
                                   char       **message_title,
                                   char       **message_body,
                                   char       **message_details,
                                   char       **button_label,
                                   char       **button_action,
                                   const char **button_accesskey,
                                   char       **hidden_button_label,
                                   char       **hidden_button_action,
                                   const char **hidden_button_accesskey,
                                   const char **icon_name,
                                   const char **style)
{
  char *formatted_origin;
  char *first_paragraph;

  /* Page title when a site is flagged by Google Safe Browsing verification. */
  *page_title = g_strdup_printf (_("Security Warning"));

  /* Message title on the unsafe browsing error page. */
  *message_title = g_strdup (_("Unsafe website detected!"));

  formatted_origin = g_strdup_printf ("<strong>%s</strong>", origin);
  /* Error details on the unsafe browsing error page.
   * https://developers.google.com/safe-browsing/v4/usage-limits#UserWarnings
   */
  if (!g_strcmp0 (threat_type, GSB_THREAT_TYPE_MALWARE)) {
    first_paragraph = g_strdup_printf (_("Visiting %s may harm your computer. This "
                                         "page appears to contain malicious code that could "
                                         "be downloaded to your computer without your consent."),
                                       formatted_origin);
    *message_details = g_strdup_printf (_("You can learn more about harmful web content "
                                          "including viruses and other malicious code "
                                          "and how to protect your computer at %s."),
                                        "<a href=\"https://www.stopbadware.org/\">"
                                          "www.stopbadware.org"
                                        "</a>");
  } else if (!g_strcmp0 (threat_type, GSB_THREAT_TYPE_SOCIAL_ENGINEERING)) {
    first_paragraph = g_strdup_printf (_("Attackers on %s may trick you into doing "
                                         "something dangerous like installing software or "
                                         "revealing your personal information (for example, "
                                         "passwords, phone numbers, or credit cards)."),
                                       formatted_origin);
    *message_details = g_strdup_printf (_("You can find out more about social engineering "
                                          "(phishing) at %s or from %s."),
                                        "<a href=\"https://support.google.com/webmasters/answer/6350487\">"
                                          "Social Engineering (Phishing and Deceptive Sites)"
                                        "</a>",
                                        "<a href=\"https://www.antiphishing.org/\">"
                                          "www.antiphishing.org"
                                        "</a>");
  } else {
    first_paragraph = g_strdup_printf (_("%s may contain harmful programs. Attackers might "
                                         "attempt to trick you into installing programs that "
                                         "harm your browsing experience (for example, by changing "
                                         "your homepage or showing extra ads on sites you visit)."),
                                       formatted_origin);
    *message_details = g_strdup_printf (_("You can learn more about unwanted software at %s."),
                                        "<a href=\"https://www.google.com/about/unwanted-software-policy.html\">"
                                          "Unwanted Software Policy"
                                        "</a>");
  }

  *message_body = g_strdup_printf ("<p>%s</p>", first_paragraph);

  /* The button on unsafe browsing error page. DO NOT ADD MNEMONICS HERE. */
  *button_label = g_strdup (_("Go Back"));
  *button_action = g_strdup ("window.history.back();");
  /* Mnemonic for the Go Back button on the unsafe browsing error page. */
  *button_accesskey = C_("back-access-key", "B");

  /* The hidden button on the unsafe browsing error page. Do not add mnemonics here. */
  *hidden_button_label = g_strdup (_("Accept Risk and Proceed"));
  *hidden_button_action = g_strdup_printf ("window.webkit.messageHandlers.unsafeBrowsingErrorPage.postMessage(%"G_GUINT64_FORMAT ");",
                                           webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (view)));
  /* Mnemonic for the Accept Risk and Proceed button on the unsafe browsing error page. */
  *hidden_button_accesskey = C_("proceed-anyway-access-key", "P");

  *icon_name = "security-high-symbolic.png";
  *style = "danger";

  g_free (formatted_origin);
  g_free (first_paragraph);
}

/**
 * ephy_web_view_load_error_page:
 * @view: an #EphyWebView
 * @uri: uri that caused the failure
 * @page: one of #EphyWebViewErrorPage
 * @error: a GError to inspect, or %NULL
 * @user_data: a pointer to additional data
 *
 * Loads an error page appropiate for @page in @view.
 *
 **/
void
ephy_web_view_load_error_page (EphyWebView         *view,
                               const char          *uri,
                               EphyWebViewErrorPage page,
                               GError              *error,
                               gpointer             user_data)
{
  GBytes *html_file;
  GString *html = g_string_new ("");
  char *origin = NULL;
  char *lang = NULL;
  char *page_title = NULL;
  char *msg_title = NULL;
  char *msg_body = NULL;
  char *msg_details = NULL;
  char *button_label = NULL;
  char *hidden_button_label = NULL;
  char *button_action = NULL;
  char *hidden_button_action = NULL;
  char *style_sheet = NULL;
  const char *button_accesskey = NULL;
  const char *hidden_button_accesskey = NULL;
  const char *icon_name = NULL;
  const char *style = NULL;
  const char *reason = NULL;

  g_assert (page != EPHY_WEB_VIEW_ERROR_PAGE_NONE);

  view->loading_error_page = TRUE;
  view->error_page = page;

  if (page == EPHY_WEB_VIEW_ERROR_INVALID_TLS_CERTIFICATE)
    ephy_web_view_set_security_level (view, EPHY_SECURITY_LEVEL_UNACCEPTABLE_CERTIFICATE);
  else
    ephy_web_view_set_security_level (view, EPHY_SECURITY_LEVEL_LOCAL_PAGE);

  reason = error ? error->message : _("None specified");

  origin = ephy_uri_to_security_origin (uri);
  if (origin == NULL)
    origin = g_strdup (uri);

  lang = g_strdup (pango_language_to_string (gtk_get_default_language ()));
  g_strdelimit (lang, "_-@", '\0');

  html_file = g_resources_lookup_data (EPHY_PAGE_TEMPLATE_ERROR, 0, NULL);

  switch (page) {
    case EPHY_WEB_VIEW_ERROR_PAGE_NETWORK_ERROR:
      format_network_error_page (uri,
                                 origin,
                                 reason,
                                 &page_title,
                                 &msg_title,
                                 &msg_body,
                                 &msg_details,
                                 &button_label,
                                 &button_action,
                                 &button_accesskey,
                                 &icon_name,
                                 &style);
      break;
    case EPHY_WEB_VIEW_ERROR_PAGE_CRASH:
      format_crash_error_page (uri,
                               &page_title,
                               &msg_title,
                               &msg_body,
                               &button_label,
                               &button_action,
                               &button_accesskey,
                               &icon_name,
                               &style);
      break;
    case EPHY_WEB_VIEW_ERROR_PROCESS_CRASH:
      format_process_crash_error_page (uri,
                                       &page_title,
                                       &msg_title,
                                       &msg_body,
                                       &button_label,
                                       &button_action,
                                       &button_accesskey,
                                       &icon_name,
                                       &style);
      break;
    case EPHY_WEB_VIEW_ERROR_INVALID_TLS_CERTIFICATE:
      format_tls_error_page (view,
                             origin,
                             &page_title,
                             &msg_title,
                             &msg_body,
                             &msg_details,
                             &button_label,
                             &button_action,
                             &button_accesskey,
                             &hidden_button_label,
                             &hidden_button_action,
                             &hidden_button_accesskey,
                             &icon_name,
                             &style);
      break;
    case EPHY_WEB_VIEW_ERROR_UNSAFE_BROWSING:
      format_unsafe_browsing_error_page (view,
                                         origin,
                                         user_data,
                                         &page_title,
                                         &msg_title,
                                         &msg_body,
                                         &msg_details,
                                         &button_label,
                                         &button_action,
                                         &button_accesskey,
                                         &hidden_button_label,
                                         &hidden_button_action,
                                         &hidden_button_accesskey,
                                         &icon_name,
                                         &style);
      break;

    case EPHY_WEB_VIEW_ERROR_PAGE_NONE:
    default:
      g_assert_not_reached ();
  }

  _ephy_web_view_update_icon (view);

  style_sheet = get_style_sheet ();

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
  /* The HTML file is trusted input. */
  g_string_printf (html,
                   g_bytes_get_data (html_file, NULL),
                   lang, lang,
                   ((gtk_widget_get_default_direction () == GTK_TEXT_DIR_RTL) ? "rtl" : "ltr"),
                   page_title,
                   style_sheet,
                   button_action, hidden_button_action,
                   icon_name,
                   style,
                   msg_title, msg_body,
                   msg_details ? "visible" : "hidden",
                   _("Technical information"),
                   msg_details,
                   hidden_button_label ? "visible" : "hidden",
                   hidden_button_accesskey, hidden_button_label,
                   button_accesskey, button_label);
#pragma GCC diagnostic pop

  g_bytes_unref (html_file);
  g_free (origin);
  g_free (lang);
  g_free (page_title);
  g_free (msg_title);
  g_free (msg_body);
  g_free (msg_details);
  g_free (button_label);
  g_free (button_action);
  g_free (hidden_button_label);
  g_free (hidden_button_action);
  g_free (style_sheet);

  /* Make our history backend ignore the next page load, since it will be an error page. */
  ephy_web_view_freeze_history (view);
  webkit_web_view_load_alternate_html (WEBKIT_WEB_VIEW (view), html->str, uri, 0);
  g_string_free (html, TRUE);
}

static gboolean
load_failed_cb (WebKitWebView  *web_view,
                WebKitLoadEvent load_event,
                const char     *uri,
                GError         *error,
                gpointer        user_data)
{
  EphyWebView *view = EPHY_WEB_VIEW (web_view);

  view->load_failed = TRUE;
  ephy_web_view_set_link_message (view, NULL);

  if (error->domain != WEBKIT_NETWORK_ERROR &&
      error->domain != WEBKIT_POLICY_ERROR &&
      error->domain != WEBKIT_PLUGIN_ERROR) {
    ephy_web_view_load_error_page (view, uri, EPHY_WEB_VIEW_ERROR_PAGE_NETWORK_ERROR, error, NULL);
    return TRUE;
  }

  switch (error->code) {
    case WEBKIT_NETWORK_ERROR_FAILED:
    case WEBKIT_NETWORK_ERROR_TRANSPORT:
    case WEBKIT_NETWORK_ERROR_UNKNOWN_PROTOCOL:
    case WEBKIT_NETWORK_ERROR_FILE_DOES_NOT_EXIST:
    case WEBKIT_POLICY_ERROR_FAILED:
    case WEBKIT_POLICY_ERROR_CANNOT_SHOW_MIME_TYPE:
    case WEBKIT_POLICY_ERROR_CANNOT_SHOW_URI:
    case WEBKIT_POLICY_ERROR_CANNOT_USE_RESTRICTED_PORT:
    case WEBKIT_PLUGIN_ERROR_FAILED:
    case WEBKIT_PLUGIN_ERROR_CANNOT_FIND_PLUGIN:
    case WEBKIT_PLUGIN_ERROR_CANNOT_LOAD_PLUGIN:
    case WEBKIT_PLUGIN_ERROR_JAVA_UNAVAILABLE:
    case WEBKIT_PLUGIN_ERROR_CONNECTION_CANCELLED:
      ephy_web_view_load_error_page (view, uri, EPHY_WEB_VIEW_ERROR_PAGE_NETWORK_ERROR, error, NULL);
      return TRUE;
    case WEBKIT_NETWORK_ERROR_CANCELLED:
    {
      if (!view->typed_address) {
        const char *prev_uri;

        prev_uri = webkit_web_view_get_uri (web_view);
        ephy_web_view_set_address (view, prev_uri);
      }
    }
    break;
    case WEBKIT_POLICY_ERROR_FRAME_LOAD_INTERRUPTED_BY_POLICY_CHANGE:
      /* If we are going to download something, and this is the first
       * page to load in this tab, we may want to close it down. */
      if (!view->ever_committed)
        g_signal_emit_by_name (view, "download-only-load", NULL);
      break;
    /* In case the resource is going to be showed with a plugin just let
     * WebKit do it */
    case WEBKIT_PLUGIN_ERROR_WILL_HANDLE_LOAD:
    default:
      break;
  }

  return FALSE;
}

static gboolean
load_failed_with_tls_error_cb (WebKitWebView       *web_view,
                               const char          *uri,
                               GTlsCertificate     *certificate,
                               GTlsCertificateFlags errors,
                               gpointer             user_data)
{
  EphyWebView *view = EPHY_WEB_VIEW (web_view);

  g_clear_object (&view->certificate);
  g_clear_pointer (&view->tls_error_failing_uri, g_free);

  view->certificate = g_object_ref (certificate);
  view->tls_errors = errors;
  view->tls_error_failing_uri = g_strdup (uri);
  ephy_web_view_load_error_page (EPHY_WEB_VIEW (web_view), uri,
                                 EPHY_WEB_VIEW_ERROR_INVALID_TLS_CERTIFICATE, NULL, NULL);

  return TRUE;
}

static void
mixed_content_detected_cb (WebKitWebView             *web_view,
                           WebKitInsecureContentEvent event,
                           gpointer                   user_data)
{
  EphyWebView *view = EPHY_WEB_VIEW (web_view);

  if (view->security_level != EPHY_SECURITY_LEVEL_UNACCEPTABLE_CERTIFICATE)
    ephy_web_view_set_security_level (view, EPHY_SECURITY_LEVEL_MIXED_CONTENT);
}

static void
close_web_view_cb (WebKitWebView *web_view,
                   gpointer       user_data)

{
  GtkWidget *widget = gtk_widget_get_toplevel (GTK_WIDGET (web_view));

  LOG ("close web view");

  if (EPHY_IS_EMBED_CONTAINER (widget))
    ephy_embed_container_remove_child (EPHY_EMBED_CONTAINER (widget),
                                       EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (web_view));
  else
    gtk_widget_destroy (widget);
}


static void
zoom_changed_cb (WebKitWebView *web_view,
                 GParamSpec    *pspec,
                 gpointer       user_data)
{
  const char *address;
  double zoom;

  zoom = webkit_web_view_get_zoom_level (web_view);

  if (EPHY_WEB_VIEW (web_view)->is_setting_zoom)
    return;

  address = ephy_web_view_get_address (EPHY_WEB_VIEW (web_view));
  if (ephy_embed_utils_address_has_web_scheme (address)) {
    ephy_history_service_set_url_zoom_level (EPHY_WEB_VIEW (web_view)->history_service,
                                             address, zoom,
                                             NULL, NULL, NULL);
  }
}

static gboolean
script_dialog_cb (WebKitWebView      *web_view,
                  WebKitScriptDialog *dialog)
{
  if (webkit_script_dialog_get_dialog_type (dialog) != WEBKIT_SCRIPT_DIALOG_BEFORE_UNLOAD_CONFIRM)
    return FALSE;

  /* Ignore beforeunload events for now until we properly support webkit_web_view_try_close()
   * See https://bugzilla.gnome.org/show_bug.cgi?id=722032.
   */
  webkit_script_dialog_confirm_set_confirmed (dialog, TRUE);

  return TRUE;
}

static void
ephy_web_view_init (EphyWebView *web_view)
{
  web_view->is_blank = TRUE;
  web_view->ever_committed = FALSE;
  web_view->document_type = EPHY_WEB_VIEW_DOCUMENT_HTML;
  web_view->security_level = EPHY_SECURITY_LEVEL_TO_BE_DETERMINED;

  web_view->file_monitor = ephy_file_monitor_new (web_view);

  web_view->history_service = ephy_embed_shell_get_global_history_service (ephy_embed_shell_get_default ());
  web_view->history_service_cancellable = g_cancellable_new ();

  g_signal_connect (web_view, "decide-policy",
                    G_CALLBACK (decide_policy_cb),
                    NULL);

  g_signal_connect (web_view, "permission-request",
                    G_CALLBACK (permission_request_cb),
                    NULL);

  g_signal_connect (web_view, "load-changed",
                    G_CALLBACK (load_changed_cb),
                    NULL);

  g_signal_connect (web_view, "close",
                    G_CALLBACK (close_web_view_cb),
                    NULL);
  g_signal_connect (web_view, "load-failed",
                    G_CALLBACK (load_failed_cb),
                    NULL);

  g_signal_connect (web_view, "load-failed-with-tls-errors",
                    G_CALLBACK (load_failed_with_tls_error_cb),
                    NULL);

  g_signal_connect (web_view, "insecure-content-detected",
                    G_CALLBACK (mixed_content_detected_cb),
                    NULL);

  g_signal_connect (web_view, "notify::zoom-level",
                    G_CALLBACK (zoom_changed_cb),
                    NULL);

  g_signal_connect (web_view, "notify::title",
                    G_CALLBACK (title_changed_cb),
                    NULL);

  g_signal_connect (web_view, "notify::uri",
                    G_CALLBACK (uri_changed_cb),
                    NULL);

  g_signal_connect (web_view, "mouse-target-changed",
                    G_CALLBACK (mouse_target_changed_cb),
                    NULL);

  g_signal_connect (web_view, "notify::favicon",
                    G_CALLBACK (icon_changed_cb),
                    NULL);

  g_signal_connect (web_view, "script-dialog",
                    G_CALLBACK (script_dialog_cb),
                    NULL);

  g_signal_connect (web_view, "new-window",
                    G_CALLBACK (new_window_cb),
                    NULL);

  g_signal_connect_object (ephy_embed_shell_get_default (), "page-created",
                           G_CALLBACK (page_created_cb),
                           web_view, 0);
}

/**
 * ephy_web_view_new:
 *
 * Equivalent to g_object_new() but returns an #GtkWidget so you don't have
 * to cast it when dealing with most code.
 *
 * Return value: the newly created #EphyWebView widget
 **/
GtkWidget *
ephy_web_view_new (void)
{
  EphyEmbedShell *shell = ephy_embed_shell_get_default ();

  return g_object_new (EPHY_TYPE_WEB_VIEW,
                       "web-context", ephy_embed_shell_get_web_context (shell),
                       "user-content-manager", ephy_embed_shell_get_user_content_manager (shell),
                       "settings", ephy_embed_prefs_get_settings (),
                       NULL);
}

GtkWidget *
ephy_web_view_new_with_related_view (WebKitWebView *related_view)
{
  EphyEmbedShell *shell = ephy_embed_shell_get_default ();

  return g_object_new (EPHY_TYPE_WEB_VIEW,
                       "related-view", related_view,
                       "user-content-manager", ephy_embed_shell_get_user_content_manager (shell),
                       "settings", ephy_embed_prefs_get_settings (),
                       NULL);
}

/**
 * ephy_web_view_load_request:
 * @view: the #EphyWebView in which to load the request
 * @request: the #WebKitNetworkRequest to be loaded
 *
 * Loads the given #WebKitNetworkRequest in the given #EphyWebView.
 **/
void
ephy_web_view_load_request (EphyWebView      *view,
                            WebKitURIRequest *request)
{
  const char *url;
  char *effective_url;

  g_assert (EPHY_IS_WEB_VIEW (view));
  g_assert (WEBKIT_IS_URI_REQUEST (request));

  url = webkit_uri_request_get_uri (request);
  effective_url = ephy_embed_utils_normalize_address (url);

  webkit_uri_request_set_uri (request, effective_url);
  g_free (effective_url);

  webkit_web_view_load_request (WEBKIT_WEB_VIEW (view), request);
}

/**
 * ephy_web_view_load_url:
 * @view: an #EphyWebView
 * @url: a URL
 *
 * Loads @url in @view.
 **/
void
ephy_web_view_load_url (EphyWebView *view,
                        const char  *url)
{
  char *effective_url;

  g_assert (EPHY_IS_WEB_VIEW (view));
  g_assert (url);

  view->reader_active = FALSE;

  effective_url = ephy_embed_utils_normalize_address (url);
  if (g_str_has_prefix (effective_url, "javascript:")) {
    char *decoded_url;

    decoded_url = soup_uri_decode (effective_url);
    webkit_web_view_run_javascript (WEBKIT_WEB_VIEW (view), decoded_url, NULL, NULL, NULL);
    g_free (decoded_url);
  } else
    webkit_web_view_load_uri (WEBKIT_WEB_VIEW (view), effective_url);

  g_free (effective_url);
}

/**
 * ephy_web_view_get_is_blank:
 * @view: an #EphyWebView
 *
 * Returns whether the  @view's address is "blank".
 *
 * Return value: %TRUE if the @view's address is "blank"
 **/
gboolean
ephy_web_view_get_is_blank (EphyWebView *view)
{
  return view->is_blank;
}

gboolean
ephy_web_view_is_overview (EphyWebView *view)
{
  if (!view->address)
    return FALSE;

  return (!strcmp (view->address, EPHY_ABOUT_SCHEME ":overview") ||
          !strcmp (view->address, "about:overview"));
}

/**
 * ephy_web_view_get_address:
 * @view: an #EphyWebView
 *
 * Returns the address of the currently-loaded page, percent-encoded.
 * This URI should not be displayed to the user; to do that, use
 * ephy_web_view_get_display_address().
 *
 * Return value: @view's address. Will never be %NULL.
 **/
const char *
ephy_web_view_get_address (EphyWebView *view)
{
  return view->address ? view->address : "about:blank";
}

/**
 * ephy_web_view_get_display_address:
 * @view: an #EphyWebView
 *
 * Returns the display address of the currently-loaded page. This is a
 * decoded URI suitable for display to the user. To get a URI suitable
 * for sending to a server, e.g. for storage in the bookmarks or history
 * database, use ephy_web_view_get_address().
 *
 * Return value: @view's address. Will never be %NULL.
 */
const char *
ephy_web_view_get_display_address (EphyWebView *view)
{
  return view->display_address ? view->display_address : "about:blank";
}

/**
 * ephy_web_view_is_loading:
 * @view: an #EphyWebView
 *
 * Returns whether the web page in @view has finished loading. A web
 * page is only finished loading after all images, styles, and other
 * dependencies have been downloaded and rendered, or when the load
 * has failed for some reason.
 *
 * Return value: %TRUE if the page is still loading, %FALSE if complete
 **/
gboolean
ephy_web_view_is_loading (EphyWebView *view)
{
  return webkit_web_view_is_loading (WEBKIT_WEB_VIEW (view));
}

/**
 * ephy_web_view_load_failed:
 * @view: an #EphyWebView
 *
 * Returns whether the web page in @view has failed to load.
 *
 * Return value: %TRUE if the page failed to load, %FALSE if it's loading
 * or load finished successfully
 **/
gboolean
ephy_web_view_load_failed (EphyWebView *view)
{
  return view->load_failed;
}

/**
 * ephy_web_view_get_icon:
 * @view: an #EphyWebView
 *
 * Returns the view's site icon as a #GdkPixbuf,
 * or %NULL if it is not available.
 *
 * Return value: (transfer none): a the view's site icon
 **/
GdkPixbuf *
ephy_web_view_get_icon (EphyWebView *view)
{
  return view->icon;
}

/**
 * ephy_web_view_get_document_type:
 * @view: an #EphyWebView
 *
 * Returns the type of document loaded in the @view
 *
 * Return value: the #EphyWebViewDocumentType
 **/
EphyWebViewDocumentType
ephy_web_view_get_document_type (EphyWebView *view)
{
  return view->document_type;
}

/**
 * ephy_web_view_get_navigation_flags:
 * @view: an #EphyWebView
 *
 * Returns @view's navigation flags.
 *
 * Return value: @view's navigation flags
 **/
EphyWebViewNavigationFlags
ephy_web_view_get_navigation_flags (EphyWebView *view)
{
  return view->nav_flags;
}

/**
 * ephy_web_view_get_status_message:
 * @view: an #EphyWebView
 *
 * Returns the message displayed in @view's #EphyWindow's
 * #EphyStatusbar. If the user is hovering the mouse over a hyperlink,
 * this function will return the same value as
 * ephy_web_view_get_link_message(). Otherwise, it will return a network
 * status message, or NULL.
 *
 * The message returned has a limited lifetime, and so should be copied with
 * g_strdup() if it must be stored.
 *
 * Return value: The current statusbar message
 **/
const char *
ephy_web_view_get_status_message (EphyWebView *view)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  if (view->link_message && view->link_message[0] != '\0')
    return view->link_message;

  if (view->loading_message)
    return view->loading_message;

  return NULL;
}

/**
 * ephy_web_view_get_link_message:
 * @view: an #EphyWebView
 *
 * When the user is hovering the mouse over a hyperlink, returns the URL of the
 * hyperlink.
 *
 * Return value: the URL of the link over which the mouse is hovering
 **/
const char *
ephy_web_view_get_link_message (EphyWebView *view)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  return view->link_message;
}

/**
 * ephy_web_view_set_link_message:
 * @view: an #EphyWebView
 * @address: new value for link-message in @view
 *
 * Sets the value of link-message property which tells the URL of the hovered
 * link.
 **/
void
ephy_web_view_set_link_message (EphyWebView *view,
                                const char  *address)
{
  char *decoded_address;

  g_assert (EPHY_IS_WEB_VIEW (view));

  g_free (view->link_message);

  if (address) {
    decoded_address = ephy_uri_decode (address);
    view->link_message = ephy_embed_utils_link_message_parse (decoded_address);
    g_free (decoded_address);
  } else {
    view->link_message = NULL;
  }

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_STATUS_MESSAGE]);
  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_LINK_MESSAGE]);
}

/**
 * ephy_web_view_set_security_level:
 * @view: an #EphyWebView
 * @level: the new #EphySecurityLevel for @view
 *
 * Sets @view's security-level property to @level.
 **/
void
ephy_web_view_set_security_level (EphyWebView      *view,
                                  EphySecurityLevel level)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  if (view->security_level != level) {
    view->security_level = level;

    g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_SECURITY]);
  }
}

/**
 * ephy_web_view_get_typed_address:
 * @view: an #EphyWebView
 *
 * Returns the text that the user introduced in the @view's
 * #EphyWindow location entry, if any.
 *
 * This is not guaranteed to be the same as @view's location,
 * available through ephy_web_view_get_address(). As the user types a
 * new address into the location entry,
 * ephy_web_view_get_typed_address()'s returned string will
 * change. When the load starts, ephy_web_view_get_typed_address()
 * will return %NULL, and ephy_web_view_get_address() will return the
 * new page being loaded. Note that the typed_address can be changed
 * again while a load is in progress (in case the user starts to type
 * again in the location entry); in that case
 * ephy_web_view_get_typed_address() will be again non-%NULL, and the
 * contents of the entry will not be overwritten.
 *
 * Return value: @view's #EphyWindow's location entry text when @view
 * is selected.
 **/
const char *
ephy_web_view_get_typed_address (EphyWebView *view)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  return view->typed_address;
}

/**
 * ephy_web_view_set_typed_address:
 * @view: an #EphyWebView
 * @address: the new typed address, or %NULL to clear it
 *
 * Sets the text that @view's #EphyWindow will display in its location toolbar
 * entry when @view is selected.
 **/
void
ephy_web_view_set_typed_address (EphyWebView *view,
                                 const char  *address)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  g_free (view->typed_address);
  view->typed_address = g_strdup (address);

  g_object_notify_by_pspec (G_OBJECT (view), obj_properties[PROP_TYPED_ADDRESS]);
}

gboolean
ephy_web_view_get_should_bypass_safe_browsing (EphyWebView *view)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  return view->bypass_safe_browsing;
}

void
ephy_web_view_set_should_bypass_safe_browsing (EphyWebView *view,
                                               gboolean     bypass_safe_browsing)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  view->bypass_safe_browsing = bypass_safe_browsing;
}

static void
has_modified_forms_cb (WebKitWebView *view,
                       GAsyncResult  *result,
                       GTask         *task)
{
  WebKitJavascriptResult *js_result;
  gboolean retval = FALSE;

  js_result = webkit_web_view_run_javascript_in_world_finish (view, result, NULL);
  if (js_result) {
    retval = jsc_value_to_boolean (webkit_javascript_result_get_js_value (js_result));
    webkit_javascript_result_unref (js_result);
  }

  g_task_return_boolean (task, retval);
  g_object_unref (task);
}

/**
 * ephy_web_view_has_modified_forms:
 * @view: an #EphyWebView
 *
 * A small heuristic is used here. If there's only one input element modified
 * and it does not have a lot of text the user is likely not very interested in
 * saving this work, so it returns %FALSE in this case (eg, google search
 * input).
 *
 * Returns %TRUE if the user has modified &lt;input&gt; or &lt;textarea&gt;
 * values in @view's loaded document.
 *
 * Return value: %TRUE if @view has user-modified forms
 **/
void
ephy_web_view_has_modified_forms (EphyWebView        *view,
                                  GCancellable       *cancellable,
                                  GAsyncReadyCallback callback,
                                  gpointer            user_data)
{
  GTask *task;

  g_assert (EPHY_IS_WEB_VIEW (view));

  task = g_task_new (view, cancellable, callback, user_data);
  webkit_web_view_run_javascript_in_world (WEBKIT_WEB_VIEW (view),
                                           "Ephy.hasModifiedForms();",
                                           ephy_embed_shell_get_guid (ephy_embed_shell_get_default ()),
                                           cancellable,
                                           (GAsyncReadyCallback)has_modified_forms_cb,
                                           task);
}

gboolean
ephy_web_view_has_modified_forms_finish (EphyWebView  *view,
                                         GAsyncResult *result,
                                         GError      **error)
{
  g_assert (g_task_is_valid (result, view));

  return g_task_propagate_boolean (G_TASK (result), error);
}

typedef struct {
  char *icon_uri;
  char *icon_color;
} GetBestWebAppIconAsyncData;

static void
get_best_web_app_icon_async_data_free (GetBestWebAppIconAsyncData *data)
{
  g_free (data->icon_uri);
  g_free (data->icon_color);

  g_slice_free (GetBestWebAppIconAsyncData, data);
}

static void
get_best_web_app_icon_cb (WebKitWebView *view,
                          GAsyncResult  *result,
                          GTask         *task)
{
  WebKitJavascriptResult *js_result;
  GError *error = NULL;

  js_result = webkit_web_view_run_javascript_in_world_finish (view, result, &error);
  if (js_result) {
    JSCValue *js_value, *js_uri, *js_color;
    GetBestWebAppIconAsyncData *data;

    data = g_slice_new0 (GetBestWebAppIconAsyncData);
    js_value = webkit_javascript_result_get_js_value (js_result);
    g_assert (jsc_value_is_object (js_value));

    js_uri = jsc_value_object_get_property (js_value, "url");
    data->icon_uri = jsc_value_to_string (js_uri);
    g_object_unref (js_uri);

    js_color = jsc_value_object_get_property (js_value, "icon");
    data->icon_color = jsc_value_is_null (js_color) || jsc_value_is_undefined (js_color) ? NULL : jsc_value_to_string (js_color);
    g_object_unref (js_color);

    g_task_return_pointer (task, data, (GDestroyNotify)get_best_web_app_icon_async_data_free);
    webkit_javascript_result_unref (js_result);
  } else
    g_task_return_error (task, error);

  g_object_unref (task);
}

void
ephy_web_view_get_best_web_app_icon (EphyWebView        *view,
                                     GCancellable       *cancellable,
                                     GAsyncReadyCallback callback,
                                     gpointer            user_data)
{
  WebKitWebView *wk_view;
  GTask *task;
  char *script;

  g_assert (EPHY_IS_WEB_VIEW (view));
  wk_view = WEBKIT_WEB_VIEW (view);

  task = g_task_new (view, cancellable, callback, user_data);
  script = g_strdup_printf ("Ephy.getWebAppIcon(\"%s\");", webkit_web_view_get_uri (wk_view));
  webkit_web_view_run_javascript_in_world (wk_view,
                                           script,
                                           ephy_embed_shell_get_guid (ephy_embed_shell_get_default ()),
                                           cancellable,
                                           (GAsyncReadyCallback)get_best_web_app_icon_cb,
                                           task);
  g_free (script);
}

gboolean
ephy_web_view_get_best_web_app_icon_finish (EphyWebView  *view,
                                            GAsyncResult *result,
                                            char        **icon_uri,
                                            GdkRGBA      *icon_color,
                                            GError      **error)
{
  GetBestWebAppIconAsyncData *data;
  GTask *task = G_TASK (result);

  g_assert (g_task_is_valid (result, view));

  data = g_task_propagate_pointer (task, error);
  if (!data)
    return FALSE;

  if (data->icon_uri != NULL && data->icon_uri[0] != '\0') {
    *icon_uri = data->icon_uri;
    data->icon_uri = NULL;
  }

  if (data->icon_color != NULL && data->icon_color[0] != '\0')
    gdk_rgba_parse (icon_color, data->icon_color);

  get_best_web_app_icon_async_data_free (data);

  return TRUE;
}

static void
get_web_app_title_cb (WebKitWebView *view,
                      GAsyncResult  *result,
                      GTask         *task)
{
  WebKitJavascriptResult *js_result;
  GError *error = NULL;

  js_result = webkit_web_view_run_javascript_in_world_finish (view, result, &error);
  if (js_result) {
    JSCValue *js_value;
    char *retval = NULL;

    js_value = webkit_javascript_result_get_js_value (js_result);
    if (!jsc_value_is_null (js_value) && !jsc_value_is_undefined (js_value))
      retval = jsc_value_to_string (js_value);
    g_task_return_pointer (task, retval, (GDestroyNotify)g_free);
    webkit_javascript_result_unref (js_result);
  } else
    g_task_return_error (task, error);

  g_object_unref (task);
}

void
ephy_web_view_get_web_app_title (EphyWebView        *view,
                                 GCancellable       *cancellable,
                                 GAsyncReadyCallback callback,
                                 gpointer            user_data)
{
  GTask *task;

  g_assert (EPHY_IS_WEB_VIEW (view));

  task = g_task_new (view, cancellable, callback, user_data);
  webkit_web_view_run_javascript_in_world (WEBKIT_WEB_VIEW (view),
                                           "Ephy.getWebAppTitle();",
                                           ephy_embed_shell_get_guid (ephy_embed_shell_get_default ()),
                                           cancellable,
                                           (GAsyncReadyCallback)get_web_app_title_cb,
                                           task);
}

char *
ephy_web_view_get_web_app_title_finish (EphyWebView  *view,
                                        GAsyncResult *result,
                                        GError      **error)
{
  g_assert (g_task_is_valid (result, view));

  return g_task_propagate_pointer (G_TASK (result), error);
}

/**
 * ephy_web_view_get_security_level:
 * @view: an #EphyWebView
 * @level: (out): return value of security level
 * @address: (out) (transfer none): the URI to which the security level corresponds
 * @certificate: (out) (transfer none): return value of TLS certificate
 * @errors: (out): return value of TLS errors
 *
 * Fetches the #EphySecurityLevel and a #GTlsCertificate associated
 * with @view and a #GTlsCertificateFlags showing what problems, if any,
 * have been found with that certificate.
 **/
void
ephy_web_view_get_security_level (EphyWebView           *view,
                                  EphySecurityLevel     *level,
                                  const char           **address,
                                  GTlsCertificate      **certificate,
                                  GTlsCertificateFlags  *errors)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  if (level)
    *level = view->security_level;

  if (address)
    *address = view->last_committed_address;

  if (certificate)
    *certificate = view->certificate;

  if (errors)
    *errors = view->tls_errors;
}

static void
ephy_web_view_print_failed (EphyWebView *view, GError *error)
{
  GtkWidget *info_bar;
  GtkWidget *label;
  GtkContainer *content_area;
  EphyEmbed *embed = EPHY_GET_EMBED_FROM_EPHY_WEB_VIEW (view);

  info_bar = gtk_info_bar_new_with_buttons (_("_OK"), GTK_RESPONSE_OK, NULL);
  label = gtk_label_new (error->message);
  content_area = GTK_CONTAINER (gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar)));

  gtk_info_bar_set_message_type (GTK_INFO_BAR (info_bar), GTK_MESSAGE_ERROR);
  gtk_container_add (content_area, label);
  g_signal_connect (info_bar, "response",
                    G_CALLBACK (gtk_widget_destroy), NULL);

  ephy_embed_add_top_widget (embed, info_bar, EPHY_EMBED_TOP_WIDGET_POLICY_RETAIN_ON_TRANSITION);
  gtk_widget_show_all (info_bar);
}

static void
print_operation_finished_cb (WebKitPrintOperation *operation,
                             EphyWebView          *view)
{
  ephy_embed_shell_set_page_setup (ephy_embed_shell_get_default (),
                                   webkit_print_operation_get_page_setup (operation));
}

static void
print_operation_failed_cb (WebKitPrintOperation *operation,
                           GError               *error,
                           EphyWebView          *view)
{
  g_signal_handlers_disconnect_by_func (operation, print_operation_finished_cb, view);
  ephy_web_view_print_failed (view, error);
}

/**
 * ephy_web_view_print:
 * @view: an #EphyWebView
 *
 * Opens a dialog to print the specified view.
 *
 * Since: 2.30
 **/
void
ephy_web_view_print (EphyWebView *view)
{
  WebKitPrintOperation *operation;
  EphyEmbedShell *shell;
  GtkPrintSettings *settings;

  g_assert (EPHY_IS_WEB_VIEW (view));

  shell = ephy_embed_shell_get_default ();

  operation = webkit_print_operation_new (WEBKIT_WEB_VIEW (view));
  g_signal_connect (operation, "finished",
                    G_CALLBACK (print_operation_finished_cb),
                    view);
  g_signal_connect (operation, "failed",
                    G_CALLBACK (print_operation_failed_cb),
                    view);
  webkit_print_operation_set_page_setup (operation, ephy_embed_shell_get_page_setup (shell));
  settings = gtk_print_settings_new ();
  gtk_print_settings_set (settings,
                          GTK_PRINT_SETTINGS_OUTPUT_BASENAME,
                          webkit_web_view_get_title (WEBKIT_WEB_VIEW (view)));
  webkit_print_operation_set_print_settings (operation, settings);
  webkit_print_operation_run_dialog (operation, NULL);
  g_object_unref (operation);
  g_object_unref (settings);
}

static void
web_resource_get_data_cb (WebKitWebResource *resource,
                          GAsyncResult      *result,
                          GOutputStream     *output_stream)
{
  guchar *data;
  gsize data_length;
  GInputStream *input_stream;
  GError *error = NULL;

  data = webkit_web_resource_get_data_finish (resource, result, &data_length, &error);
  if (!data) {
    g_printerr ("Failed to save page: %s", error->message);
    g_error_free (error);
    g_object_unref (output_stream);

    return;
  }

  input_stream = g_memory_input_stream_new_from_data (data, data_length, g_free);
  g_output_stream_splice_async (output_stream, input_stream,
                                G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET,
                                G_PRIORITY_DEFAULT,
                                NULL, NULL, NULL);
  g_object_unref (input_stream);
  g_object_unref (output_stream);
}

static void
ephy_web_view_save_main_resource_cb (GFile         *file,
                                     GAsyncResult  *result,
                                     WebKitWebView *view)
{
  GFileOutputStream *output_stream;
  WebKitWebResource *resource;
  GError *error = NULL;

  output_stream = g_file_replace_finish (file, result, &error);
  if (!output_stream) {
    g_printerr ("Failed to save page: %s", error->message);
    g_error_free (error);

    return;
  }

  resource = webkit_web_view_get_main_resource (view);
  webkit_web_resource_get_data (resource, NULL,
                                (GAsyncReadyCallback)web_resource_get_data_cb,
                                output_stream);
}
/**
 * ephy_web_view_save:
 * @view: an #EphyWebView
 * @uri: location to store the saved page
 *
 * Saves the currently loaded page of @view to @uri.
 **/
void
ephy_web_view_save (EphyWebView *view, const char *uri)
{
  GFile *file;

  g_assert (EPHY_IS_WEB_VIEW (view));
  g_assert (uri);

  file = g_file_new_for_uri (uri);

  if (g_str_has_suffix (uri, ".mhtml"))
    webkit_web_view_save_to_file (WEBKIT_WEB_VIEW (view), file, WEBKIT_SAVE_MODE_MHTML,
                                  NULL, NULL, NULL);
  else
    g_file_replace_async (file, NULL, FALSE,
                          G_FILE_CREATE_REPLACE_DESTINATION | G_FILE_CREATE_PRIVATE,
                          G_PRIORITY_DEFAULT, NULL,
                          (GAsyncReadyCallback)ephy_web_view_save_main_resource_cb,
                          view);
  g_object_unref (file);
}

/**
 * ephy_web_view_load_homepage:
 * @view: an #EphyWebView
 *
 * Loads the homepage set by the user in @view.
 **/
void
ephy_web_view_load_homepage (EphyWebView *view)
{
  EphyEmbedShell *shell;
  EphyEmbedShellMode mode;
  char *home;

  g_assert (EPHY_IS_WEB_VIEW (view));

  shell = ephy_embed_shell_get_default ();
  mode = ephy_embed_shell_get_mode (shell);

  if (mode == EPHY_EMBED_SHELL_MODE_INCOGNITO) {
    ephy_web_view_load_new_tab_page (view);
    return;
  }

  home = g_settings_get_string (EPHY_SETTINGS_MAIN, EPHY_PREFS_HOMEPAGE_URL);
  if (home == NULL || home[0] == '\0') {
    ephy_web_view_load_new_tab_page(view);
  } else {
    ephy_web_view_freeze_history (view);
    ephy_web_view_set_visit_type (view, EPHY_PAGE_VISIT_HOMEPAGE);
    ephy_web_view_load_url (view, home);
  }
  g_free (home);
}

void
ephy_web_view_load_new_tab_page (EphyWebView *view)
{
  EphyEmbedShell *shell;
  EphyEmbedShellMode mode;

  g_assert (EPHY_IS_WEB_VIEW (view));

  shell = ephy_embed_shell_get_default ();
  mode = ephy_embed_shell_get_mode (shell);

  ephy_web_view_freeze_history (view);
  ephy_web_view_set_visit_type (view, EPHY_PAGE_VISIT_HOMEPAGE);
  if (mode == EPHY_EMBED_SHELL_MODE_INCOGNITO)
    ephy_web_view_load_url (view, "about:incognito");
  else
    ephy_web_view_load_url (view, "about:overview");
}

/**
 * ephy_web_view_get_visit_type:
 * @view: an #EphyWebView
 *
 * Returns: the @view #EphyWebViewVisitType
 **/
EphyHistoryPageVisitType
ephy_web_view_get_visit_type (EphyWebView *view)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  return view->visit_type;
}

/**
 * ephy_web_view_set_visit_type:
 * @view: an #EphyWebView
 * @visit_type: an #EphyHistoryPageVisitType
 *
 * Sets the @visit_type for @view, so that the URI can be
 * properly weighted in the history backend.
 **/
void
ephy_web_view_set_visit_type (EphyWebView *view, EphyHistoryPageVisitType visit_type)
{
  g_assert (EPHY_IS_WEB_VIEW (view));

  view->visit_type = visit_type;
}


/**
 * ephy_web_view_toggle_reader_mode:
 * @view: an #EphyWebView
 * @active: active flag
 *
 * Sets reader mode state to @active if necessary.
 **/
void
ephy_web_view_toggle_reader_mode (EphyWebView *view,
                                  gboolean     active)
{
  WebKitWebView *web_view = WEBKIT_WEB_VIEW (view);
  GString *html;
  GBytes *style_css;
  const gchar *title;

  if (view->reader_active == active)
    return;

  if (view->reader_active) {
    ephy_web_view_freeze_history (view);
    webkit_web_view_load_uri (web_view, view->reader_url);
    view->reader_active = FALSE;
    return;
  }

  if (!ephy_web_view_is_reader_mode_available (view)) {
   view->reader_active = FALSE;
   return;
  }

  view->reader_url = g_strdup (ephy_web_view_get_address (view));
  html = g_string_new ("");
  style_css = g_resources_lookup_data ("/org/gnome/epiphany/reader.css", G_RESOURCE_LOOKUP_FLAGS_NONE, NULL);
  title = webkit_web_view_get_title (web_view);
  g_string_append_printf (html, "<style>%s</style>"
                                "<title>%s</title>"
                                "<body>"
                                "<article>"
                                "<h2>"
                                "%s"
                                "</h2>"
                                "<i>"
                                "%s"
                                "</i>"
                                "<hr>",
                                (gchar *)g_bytes_get_data (style_css, NULL),
                                title,
                                title,
                                view->reader_byline != NULL ? view->reader_byline : "");
  g_string_append (html, view->reader_content);
  g_string_append (html, "</article>");

  ephy_web_view_freeze_history (view);
  view->reader_loading = TRUE;
  webkit_web_view_load_alternate_html (web_view, html->str, view->reader_url, NULL);
  view->reader_active = TRUE;
  g_string_free (html, TRUE);
}


gboolean
ephy_web_view_is_reader_mode_available (EphyWebView *view)
{
  return view->reader_content != NULL && strlen (view->reader_content) > 0;
}

gboolean
ephy_web_view_get_reader_mode_state (EphyWebView *view)
{
  return view->reader_active;
}
