/*
 * Copyright (C) 2006, 2007 Apple Inc.
 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
 * Copyright (C) 2011 Igalia S.L.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#if defined(HAVE_CONFIG_H) && HAVE_CONFIG_H && defined(BUILDING_WITH_CMAKE)
#include "cmakeconfig.h"
#endif
#include "BrowserWindow.h"

#include "BrowserDownloadsBar.h"
#include "BrowserSettingsDialog.h"
#include "BrowserTab.h"
#include <gdk/gdkkeysyms.h>
#include <string.h>

struct _BrowserWindow {
    GtkApplicationWindow parent;

    WebKitWebContext *webContext;

    GtkWidget *mainBox;
    GtkWidget *toolbar;
    GtkWidget *uriEntry;
    GtkWidget *backItem;
    GtkWidget *forwardItem;
    GtkWidget *editToolbar;
    GtkWidget *settingsDialog;
    GtkWidget *notebook;
    GActionGroup *editActionGroup;
    BrowserTab *activeTab;
    GtkWidget *downloadsBar;
    gboolean searchBarVisible;
    gboolean fullScreenIsEnabled;
#if GTK_CHECK_VERSION(3, 98, 0)
    GdkTexture *favicon;
#else
    GdkPixbuf *favicon;
#endif
    GtkWidget *reloadOrStopButton;
    GtkWindow *parentWindow;
    guint resetEntryProgressTimeoutId;
    gchar *sessionFile;
    GdkRGBA backgroundColor;
};

struct _BrowserWindowClass {
    GtkApplicationWindowClass parent;
};

static const char *defaultWindowTitle = "WebKitGTK MiniBrowser";
static const gdouble minimumZoomLevel = 0.5;
static const gdouble maximumZoomLevel = 3;
static const gdouble defaultZoomLevel = 1;
static const gdouble zoomStep = 1.2;

G_DEFINE_TYPE(BrowserWindow, browser_window, GTK_TYPE_APPLICATION_WINDOW)

static char *getExternalURI(const char *uri)
{
    /* From the user point of view we support about: prefix. */
    if (uri && g_str_has_prefix(uri, BROWSER_ABOUT_SCHEME))
        return g_strconcat("about", uri + strlen(BROWSER_ABOUT_SCHEME), NULL);

    return g_strdup(uri);
}

static void browserWindowSetStatusText(BrowserWindow *window, const char *text)
{
    browser_tab_set_status_text(window->activeTab, text);
}

static void activateUriEntryCallback(BrowserWindow *window)
{
    browser_window_load_uri(window,
#if GTK_CHECK_VERSION(3, 98, 0)
        gtk_editable_get_text(GTK_EDITABLE(window->uriEntry))
#else
        gtk_entry_get_text(GTK_ENTRY(window->uriEntry))
#endif
    );
}

static void reloadOrStopCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    if (webkit_web_view_is_loading(webView))
        webkit_web_view_stop_loading(webView);
    else
        webkit_web_view_reload(webView);
}

static void goBackCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    WebKitWebView *webView = browser_tab_get_web_view(BROWSER_WINDOW(userData)->activeTab);
    webkit_web_view_go_back(webView);
}

static void goForwardCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    WebKitWebView *webView = browser_tab_get_web_view(BROWSER_WINDOW(userData)->activeTab);
    webkit_web_view_go_forward(webView);
}

static void settingsCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    if (window->settingsDialog) {
        gtk_window_present(GTK_WINDOW(window->settingsDialog));
        return;
    }

    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    window->settingsDialog = browser_settings_dialog_new(webkit_web_view_get_settings(webView));
    gtk_window_set_transient_for(GTK_WINDOW(window->settingsDialog), GTK_WINDOW(window));
    g_object_add_weak_pointer(G_OBJECT(window->settingsDialog), (gpointer *)&window->settingsDialog);
    gtk_widget_show(window->settingsDialog);
}

static void webViewURIChanged(WebKitWebView *webView, GParamSpec *pspec, BrowserWindow *window)
{
    char *externalURI = getExternalURI(webkit_web_view_get_uri(webView));
#if GTK_CHECK_VERSION(3, 98, 0)
    gtk_editable_set_text(GTK_EDITABLE(window->uriEntry), externalURI ? externalURI : "");
#else
    gtk_entry_set_text(GTK_ENTRY(window->uriEntry), externalURI ? externalURI : "");
#endif
    g_free(externalURI);
}

static void webViewTitleChanged(WebKitWebView *webView, GParamSpec *pspec, BrowserWindow *window)
{
    const char *title = webkit_web_view_get_title(webView);
    if (!title)
        title = defaultWindowTitle;
    char *privateTitle = NULL;
    if (webkit_web_view_is_controlled_by_automation(webView))
        privateTitle = g_strdup_printf("[Automation] %s", title);
    else if (webkit_web_view_is_ephemeral(webView))
        privateTitle = g_strdup_printf("[Private] %s", title);
    gtk_window_set_title(GTK_WINDOW(window), privateTitle ? privateTitle : title);
    g_free(privateTitle);
}

static gboolean resetEntryProgress(BrowserWindow *window)
{
    gtk_entry_set_progress_fraction(GTK_ENTRY(window->uriEntry), 0);
    window->resetEntryProgressTimeoutId = 0;
    return FALSE;
}

static void webViewLoadProgressChanged(WebKitWebView *webView, GParamSpec *pspec, BrowserWindow *window)
{
    gdouble progress = webkit_web_view_get_estimated_load_progress(webView);
    gtk_entry_set_progress_fraction(GTK_ENTRY(window->uriEntry), progress);
    if (progress == 1.0) {
        window->resetEntryProgressTimeoutId = g_timeout_add(500, (GSourceFunc)resetEntryProgress, window);
        g_source_set_name_by_id(window->resetEntryProgressTimeoutId, "[WebKit] resetEntryProgress");
    } else if (window->resetEntryProgressTimeoutId) {
        g_source_remove(window->resetEntryProgressTimeoutId);
        window->resetEntryProgressTimeoutId = 0;
    }
}

static void downloadStarted(WebKitWebContext *webContext, WebKitDownload *download, BrowserWindow *window)
{
#if !GTK_CHECK_VERSION(3, 98, 0)
    if (!window->downloadsBar) {
        window->downloadsBar = browser_downloads_bar_new();
        gtk_box_pack_start(GTK_BOX(window->mainBox), window->downloadsBar, FALSE, FALSE, 0);
        gtk_box_reorder_child(GTK_BOX(window->mainBox), window->downloadsBar, 0);
        g_object_add_weak_pointer(G_OBJECT(window->downloadsBar), (gpointer *)&(window->downloadsBar));
        gtk_widget_show(window->downloadsBar);
    }
    browser_downloads_bar_add_download(BROWSER_DOWNLOADS_BAR(window->downloadsBar), download);
#endif
}

static void browserWindowHistoryItemActivated(BrowserWindow *window, GVariant *parameter, GAction *action)
{
    WebKitBackForwardListItem *item = g_object_get_data(G_OBJECT(action), "back-forward-list-item");
    if (!item)
        return;

    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    webkit_web_view_go_to_back_forward_list_item(webView, item);
}

static void browserWindowCreateBackForwardMenu(BrowserWindow *window, GList *list, gboolean isBack)
{
    if (!list)
        return;

    static guint64 actionId = 0;

    GSimpleActionGroup *actionGroup = g_simple_action_group_new();
    GMenu *menu = g_menu_new();
    GList *listItem;
    for (listItem = list; listItem; listItem = g_list_next(listItem)) {
        WebKitBackForwardListItem *item = (WebKitBackForwardListItem *)listItem->data;
        const char *title = webkit_back_forward_list_item_get_title(item);
        if (!title || !*title)
            title = webkit_back_forward_list_item_get_uri(item);

        char *actionName = g_strdup_printf("action-%lu", ++actionId);
        GSimpleAction *action = g_simple_action_new(actionName, NULL);
        g_object_set_data_full(G_OBJECT(action), "back-forward-list-item", g_object_ref(item), g_object_unref);
        g_signal_connect_swapped(action, "activate", G_CALLBACK(browserWindowHistoryItemActivated), window);
        g_action_map_add_action(G_ACTION_MAP(actionGroup), G_ACTION(action));
        g_object_unref(action);

        char *detailedActionName = g_strdup_printf("%s.%s", isBack ? "bf-back" : "bf-forward", actionName);
        GMenuItem *menuItem = g_menu_item_new(title, detailedActionName);
        g_menu_append_item(menu, menuItem);
        g_object_unref(menuItem);

        g_free(detailedActionName);
        g_free(actionName);
    }

#if GTK_CHECK_VERSION(3, 98, 5)
    GtkWidget *popover = gtk_popover_menu_new_from_model(G_MENU_MODEL(menu));
#else
    GtkWidget *popover = gtk_popover_menu_new();
    gtk_popover_bind_model(GTK_POPOVER(popover), G_MENU_MODEL(menu), NULL);
#endif
    g_object_unref(menu);
    gtk_widget_insert_action_group(popover, isBack ? "bf-back" : "bf-forward", G_ACTION_GROUP(actionGroup));
    g_object_unref(actionGroup);

    GtkWidget *button = isBack ? window->backItem : window->forwardItem;
#if GTK_CHECK_VERSION(3, 98, 5)
    g_object_set_data_full(G_OBJECT(button), "history-popover", popover, (GDestroyNotify)gtk_widget_unparent);
    gtk_widget_set_parent(popover, button);
#else
    gtk_popover_set_relative_to(GTK_POPOVER(popover), button);
    g_object_set_data(G_OBJECT(button), "history-popover", popover);
#endif
    gtk_popover_set_position(GTK_POPOVER(popover), GTK_POS_BOTTOM);
}

static void browserWindowUpdateNavigationMenu(BrowserWindow *window, WebKitBackForwardList *backForwardlist)
{
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    GAction *action = g_action_map_lookup_action(G_ACTION_MAP(window), "go-back");
    g_simple_action_set_enabled(G_SIMPLE_ACTION(action), webkit_web_view_can_go_back(webView));
    action = g_action_map_lookup_action(G_ACTION_MAP(window), "go-forward");
    g_simple_action_set_enabled(G_SIMPLE_ACTION(action), webkit_web_view_can_go_forward(webView));

    GList *list = g_list_reverse(webkit_back_forward_list_get_back_list_with_limit(backForwardlist, 10));
    browserWindowCreateBackForwardMenu(window, list, TRUE);
    g_list_free(list);

    list = webkit_back_forward_list_get_forward_list_with_limit(backForwardlist, 10);
    browserWindowCreateBackForwardMenu(window, list, FALSE);
    g_list_free(list);
}

#if GTK_CHECK_VERSION(3, 98, 5)
static void navigationButtonPressed(GtkGestureClick *gesture, guint clickCount, double x, double y)
{
    GdkEventSequence *sequence = gtk_gesture_single_get_current_sequence(GTK_GESTURE_SINGLE(gesture));
    gtk_gesture_set_sequence_state(GTK_GESTURE(gesture), sequence, GTK_EVENT_SEQUENCE_CLAIMED);

    GtkWidget *button = gtk_event_controller_get_widget(GTK_EVENT_CONTROLLER(gesture));
    GtkWidget *popover = g_object_get_data(G_OBJECT(button), "history-popover");
    if (popover)
        gtk_popover_popup(GTK_POPOVER(popover));
}
#else
static gboolean navigationButtonPressCallback(GtkButton *button, GdkEvent *event, BrowserWindow *window)
{
    guint eventButton;
    gdk_event_get_button(event, &eventButton);
    if (eventButton != GDK_BUTTON_SECONDARY)
        return GDK_EVENT_PROPAGATE;

    GtkWidget *popover = g_object_get_data(G_OBJECT(button), "history-popover");
    if (!popover)
        return GDK_EVENT_PROPAGATE;

    gtk_popover_popup(GTK_POPOVER(popover));

    return GDK_EVENT_STOP;
}
#endif

static void browserWindowTryCloseCurrentWebView(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    int currentPage = gtk_notebook_get_current_page(GTK_NOTEBOOK(window->notebook));
    BrowserTab *tab = (BrowserTab *)gtk_notebook_get_nth_page(GTK_NOTEBOOK(window->notebook), currentPage);
    webkit_web_view_try_close(browser_tab_get_web_view(tab));
}

static void browserWindowTryClose(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    GSList *webViews = NULL;
    int n = gtk_notebook_get_n_pages(GTK_NOTEBOOK(window->notebook));
    int i;

    for (i = 0; i < n; ++i) {
        BrowserTab *tab = (BrowserTab *)gtk_notebook_get_nth_page(GTK_NOTEBOOK(window->notebook), i);
        webViews = g_slist_prepend(webViews, browser_tab_get_web_view(tab));
    }

    GSList *link;
    for (link = webViews; link; link = link->next)
        webkit_web_view_try_close(link->data);
}

static void backForwardlistChanged(WebKitBackForwardList *backForwardlist, WebKitBackForwardListItem *itemAdded, GList *itemsRemoved, BrowserWindow *window)
{
    browserWindowUpdateNavigationMenu(window, backForwardlist);
}

static void webViewClose(WebKitWebView *webView, BrowserWindow *window)
{
    int tabsCount = gtk_notebook_get_n_pages(GTK_NOTEBOOK(window->notebook));
    if (tabsCount == 1) {
#if GTK_CHECK_VERSION(3, 98, 4)
        gtk_window_destroy(GTK_WINDOW(window));
#else
        gtk_widget_destroy(GTK_WIDGET(window));
#endif
        return;
    }

    int i;
    for (i = 0; i < tabsCount; ++i) {
        BrowserTab *tab = (BrowserTab *)gtk_notebook_get_nth_page(GTK_NOTEBOOK(window->notebook), i);
        if (browser_tab_get_web_view(tab) == webView) {
#if GTK_CHECK_VERSION(3, 98, 4)
            gtk_notebook_remove_page(GTK_NOTEBOOK(window->notebook), i);
#else
            gtk_widget_destroy(GTK_WIDGET(tab));
#endif
            return;
        }
    }
}

static void webViewRunAsModal(WebKitWebView *webView, BrowserWindow *window)
{
    gtk_window_set_modal(GTK_WINDOW(window), TRUE);
    gtk_window_set_transient_for(GTK_WINDOW(window), window->parentWindow);
}

static void webViewReadyToShow(WebKitWebView *webView, BrowserWindow *window)
{
    WebKitWindowProperties *windowProperties = webkit_web_view_get_window_properties(webView);

    GdkRectangle geometry;
    webkit_window_properties_get_geometry(windowProperties, &geometry);
#if !GTK_CHECK_VERSION(3, 98, 0)
    if (geometry.x >= 0 && geometry.y >= 0)
        gtk_window_move(GTK_WINDOW(window), geometry.x, geometry.y);
#endif
    if (geometry.width > 0 && geometry.height > 0)
        gtk_window_resize(GTK_WINDOW(window), geometry.width, geometry.height);

    if (!webkit_window_properties_get_toolbar_visible(windowProperties))
        gtk_widget_hide(window->toolbar);
    else if (!webkit_window_properties_get_locationbar_visible(windowProperties))
        gtk_widget_hide(window->uriEntry);

    if (!webkit_window_properties_get_resizable(windowProperties))
        gtk_window_set_resizable(GTK_WINDOW(window), FALSE);

    gtk_widget_show(GTK_WIDGET(window));
}

static GtkWidget *webViewCreate(WebKitWebView *webView, WebKitNavigationAction *navigation, BrowserWindow *window)
{
    WebKitWebView *newWebView = WEBKIT_WEB_VIEW(webkit_web_view_new_with_related_view(webView));
    webkit_web_view_set_settings(newWebView, webkit_web_view_get_settings(webView));

    GtkWidget *newWindow = browser_window_new(GTK_WINDOW(window), window->webContext);
    gtk_window_set_application(GTK_WINDOW(newWindow), gtk_window_get_application(GTK_WINDOW(window)));
    browser_window_append_view(BROWSER_WINDOW(newWindow), newWebView);
    gtk_widget_grab_focus(GTK_WIDGET(newWebView));
    g_signal_connect(newWebView, "ready-to-show", G_CALLBACK(webViewReadyToShow), newWindow);
    g_signal_connect(newWebView, "run-as-modal", G_CALLBACK(webViewRunAsModal), newWindow);
    return GTK_WIDGET(newWebView);
}

static gboolean webViewEnterFullScreen(WebKitWebView *webView, BrowserWindow *window)
{
    gtk_widget_hide(window->toolbar);
    browser_tab_enter_fullscreen(window->activeTab);
    return FALSE;
}

static gboolean webViewLeaveFullScreen(WebKitWebView *webView, BrowserWindow *window)
{
    browser_tab_leave_fullscreen(window->activeTab);
    gtk_widget_show(window->toolbar);
    return FALSE;
}

static gboolean webViewLoadFailed(WebKitWebView *webView, WebKitLoadEvent loadEvent, const char *failingURI, GError *error, BrowserWindow *window)
{
    gtk_entry_set_progress_fraction(GTK_ENTRY(window->uriEntry), 0.);
    return FALSE;
}

static gboolean webViewDecidePolicy(WebKitWebView *webView, WebKitPolicyDecision *decision, WebKitPolicyDecisionType decisionType, BrowserWindow *window)
{
    if (decisionType != WEBKIT_POLICY_DECISION_TYPE_NAVIGATION_ACTION)
        return FALSE;

    WebKitNavigationAction *navigationAction = webkit_navigation_policy_decision_get_navigation_action(WEBKIT_NAVIGATION_POLICY_DECISION(decision));
    if (webkit_navigation_action_get_navigation_type(navigationAction) != WEBKIT_NAVIGATION_TYPE_LINK_CLICKED
        || webkit_navigation_action_get_mouse_button(navigationAction) != GDK_BUTTON_MIDDLE)
        return FALSE;

    /* Multiple tabs are not allowed in editor mode. */
    if (webkit_web_view_is_editable(webView))
        return FALSE;

    /* Opening a new tab if link clicked with the middle button. */
    WebKitWebView *newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
        "web-context", webkit_web_view_get_context(webView),
        "settings", webkit_web_view_get_settings(webView),
        "user-content-manager", webkit_web_view_get_user_content_manager(webView),
        "is-controlled-by-automation", webkit_web_view_is_controlled_by_automation(webView),
        "website-policies", webkit_web_view_get_website_policies(webView),
        NULL));
    browser_window_append_view(window, newWebView);
    webkit_web_view_load_request(newWebView, webkit_navigation_action_get_request(navigationAction));

    webkit_policy_decision_ignore(decision);
    return TRUE;
}

static void webViewMouseTargetChanged(WebKitWebView *webView, WebKitHitTestResult *hitTestResult, guint mouseModifiers, BrowserWindow *window)
{
    if (!webkit_hit_test_result_context_is_link(hitTestResult)) {
        browserWindowSetStatusText(window, NULL);
        return;
    }
    browserWindowSetStatusText(window, webkit_hit_test_result_get_link_uri(hitTestResult));
}

static gboolean browserWindowCanZoomIn(BrowserWindow *window)
{
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    gdouble zoomLevel = webkit_web_view_get_zoom_level(webView) * zoomStep;
    return zoomLevel < maximumZoomLevel;
}

static gboolean browserWindowCanZoomOut(BrowserWindow *window)
{
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    gdouble zoomLevel = webkit_web_view_get_zoom_level(webView) / zoomStep;
    return zoomLevel > minimumZoomLevel;
}

static gboolean browserWindowCanZoomDefault(BrowserWindow *window)
{
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    return webkit_web_view_get_zoom_level(webView) != 1.0;
}

static gboolean browserWindowZoomIn(BrowserWindow *window)
{
    if (browserWindowCanZoomIn(window)) {
        WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
        gdouble zoomLevel = webkit_web_view_get_zoom_level(webView) * zoomStep;
        webkit_web_view_set_zoom_level(webView, zoomLevel);
        return TRUE;
    }
    return FALSE;
}

static gboolean browserWindowZoomOut(BrowserWindow *window)
{
    if (browserWindowCanZoomOut(window)) {
        WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
        gdouble zoomLevel = webkit_web_view_get_zoom_level(webView) / zoomStep;
        webkit_web_view_set_zoom_level(webView, zoomLevel);
        return TRUE;
    }
    return FALSE;
}

#if GTK_CHECK_VERSION(3, 98, 5)
static gboolean scrollEventCallback(BrowserWindow *window, double deltaX, double deltaY, GtkEventController *controller)
{
    GdkModifierType mod = gtk_accelerator_get_default_mod_mask();
    GdkEvent *event = gtk_event_controller_get_current_event(controller);
    if ((gdk_event_get_modifier_state(event) & mod) != GDK_CONTROL_MASK)
        return GDK_EVENT_PROPAGATE;

    return deltaY < 0 ? browserWindowZoomIn(window) : browserWindowZoomOut(window);
}
#else
static gboolean scrollEventCallback(WebKitWebView *webView, const GdkEventScroll *event, BrowserWindow *window)
{
    GdkModifierType mod = gtk_accelerator_get_default_mod_mask();

    if ((event->state & mod) != GDK_CONTROL_MASK)
        return FALSE;

    if (event->delta_y < 0)
        return browserWindowZoomIn(window);

    return browserWindowZoomOut(window);
}
#endif

static void browserWindowUpdateZoomActions(BrowserWindow *window)
{
    GAction *action = g_action_map_lookup_action(G_ACTION_MAP(window), "zoom-in");
    g_simple_action_set_enabled(G_SIMPLE_ACTION(action), browserWindowCanZoomIn(window));
    action = g_action_map_lookup_action(G_ACTION_MAP(window), "zoom-out");
    g_simple_action_set_enabled(G_SIMPLE_ACTION(action), browserWindowCanZoomOut(window));
    action = g_action_map_lookup_action(G_ACTION_MAP(window), "zoom-default");
    g_simple_action_set_enabled(G_SIMPLE_ACTION(action), browserWindowCanZoomDefault(window));
}

static void webViewZoomLevelChanged(GObject *object, GParamSpec *paramSpec, BrowserWindow *window)
{
    browserWindowUpdateZoomActions(window);
}

static void updateUriEntryIcon(BrowserWindow *window)
{
    GtkEntry *entry = GTK_ENTRY(window->uriEntry);
    if (window->favicon)
#if GTK_CHECK_VERSION(3, 98, 0)
        gtk_entry_set_icon_from_paintable(entry, GTK_ENTRY_ICON_PRIMARY, GDK_PAINTABLE(window->favicon));
#else
        gtk_entry_set_icon_from_pixbuf(entry, GTK_ENTRY_ICON_PRIMARY, window->favicon);
#endif
    else
        gtk_entry_set_icon_from_icon_name(entry, GTK_ENTRY_ICON_PRIMARY, "document-new");
}

static void faviconChanged(WebKitWebView *webView, GParamSpec *paramSpec, BrowserWindow *window)
{
#if GTK_CHECK_VERSION(3, 98, 0)
    GdkTexture *favicon = NULL;
#else
    GdkPixbuf *favicon = NULL;
#endif
    cairo_surface_t *surface = webkit_web_view_get_favicon(webView);

    if (surface) {
        int width = cairo_image_surface_get_width(surface);
        int height = cairo_image_surface_get_height(surface);
#if GTK_CHECK_VERSION(3, 98, 0)
        int stride = cairo_image_surface_get_stride(surface);
        GBytes *bytes = g_bytes_new(cairo_image_surface_get_data(surface), stride * height);
        favicon = gdk_memory_texture_new(width, height, GDK_MEMORY_DEFAULT, bytes, stride);
        g_bytes_unref(bytes);
#else
        favicon = gdk_pixbuf_get_from_surface(surface, 0, 0, width, height);
#endif
    }

    if (window->favicon)
        g_object_unref(window->favicon);
    window->favicon = favicon;

    updateUriEntryIcon(window);
}

static void webViewIsLoadingChanged(WebKitWebView *webView, GParamSpec *paramSpec, BrowserWindow *window)
{
    gboolean isLoading = webkit_web_view_is_loading(webView);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_button_set_icon_name(GTK_BUTTON(window->reloadOrStopButton), isLoading ? "process-stop-symbolic" : "view-refresh-symbolic");
#else
    GtkWidget *image = gtk_button_get_image(GTK_BUTTON(window->reloadOrStopButton));
    g_object_set(image, "icon-name", isLoading ? "process-stop-symbolic" : "view-refresh-symbolic", NULL);
#endif
}

static void zoomInCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    browserWindowZoomIn(BROWSER_WINDOW(userData));
}

static void zoomOutCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    browserWindowZoomOut(BROWSER_WINDOW(userData));
}

static void defaultZoomCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    WebKitWebView *webView = browser_tab_get_web_view(BROWSER_WINDOW(userData)->activeTab);
    webkit_web_view_set_zoom_level(webView, defaultZoomLevel);
}

static void searchCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    browser_tab_start_search(BROWSER_WINDOW(userData)->activeTab);
}

static void newTabCallback(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    if (webkit_web_view_is_editable(webView))
        return;

    browser_window_append_view(window, WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
        "web-context", webkit_web_view_get_context(webView),
        "settings", webkit_web_view_get_settings(webView),
        "user-content-manager", webkit_web_view_get_user_content_manager(webView),
        "is-controlled-by-automation", webkit_web_view_is_controlled_by_automation(webView),
        "website-policies", webkit_web_view_get_website_policies(webView),
        NULL)));
    gtk_widget_grab_focus(window->uriEntry);
    gtk_notebook_set_current_page(GTK_NOTEBOOK(window->notebook), -1);
}

static void toggleWebInspector(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    browser_tab_toggle_inspector(BROWSER_WINDOW(userData)->activeTab);
}

static void openPrivateWindow(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    WebKitWebView *newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
        "web-context", webkit_web_view_get_context(webView),
        "settings", webkit_web_view_get_settings(webView),
        "user-content-manager", webkit_web_view_get_user_content_manager(webView),
        "is-ephemeral", TRUE,
        "is-controlled-by-automation", webkit_web_view_is_controlled_by_automation(webView),
        "website-policies", webkit_web_view_get_website_policies(webView),
        NULL));
    GtkWidget *newWindow = browser_window_new(GTK_WINDOW(window), window->webContext);
    gtk_window_set_application(GTK_WINDOW(newWindow), gtk_window_get_application(GTK_WINDOW(window)));
    browser_window_append_view(BROWSER_WINDOW(newWindow), newWebView);
    gtk_widget_grab_focus(GTK_WIDGET(newWebView));
    gtk_widget_show(GTK_WIDGET(newWindow));
}

static void focusLocationBar(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    gtk_widget_grab_focus(BROWSER_WINDOW(userData)->uriEntry);
}

static void reloadPage(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    WebKitWebView *webView = browser_tab_get_web_view(BROWSER_WINDOW(userData)->activeTab);
    webkit_web_view_reload(webView);
}

static void reloadPageIgnoringCache(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    WebKitWebView *webView = browser_tab_get_web_view(BROWSER_WINDOW(userData)->activeTab);
    webkit_web_view_reload_bypass_cache(webView);
}

static void stopPageLoad(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    browser_tab_stop_search(window->activeTab);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    if (webkit_web_view_is_loading(webView))
        webkit_web_view_stop_loading(webView);
}

static void loadHomePage(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    webkit_web_view_load_uri(webView, BROWSER_DEFAULT_URL);
}

static void toggleFullScreen(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    if (!window->fullScreenIsEnabled) {
        gtk_window_fullscreen(GTK_WINDOW(window));
        gtk_widget_hide(window->toolbar);
        window->fullScreenIsEnabled = TRUE;
    } else {
        gtk_window_unfullscreen(GTK_WINDOW(window));
        gtk_widget_show(window->toolbar);
        window->fullScreenIsEnabled = FALSE;
    }
}

static void webKitPrintOperationFailedCallback(WebKitPrintOperation *printOperation, GError *error)
{
    g_warning("Print failed: '%s'", error->message);
}

static void printPage(GSimpleAction *action, GVariant *parameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    WebKitPrintOperation *printOperation = webkit_print_operation_new(webView);

    g_signal_connect(printOperation, "failed", G_CALLBACK(webKitPrintOperationFailedCallback), NULL);
    webkit_print_operation_run_dialog(printOperation, GTK_WINDOW(window));
    g_object_unref(printOperation);
}

static void editingActionCallback(GSimpleAction *action, GVariant *prameter, gpointer userData)
{
    BrowserWindow *window = BROWSER_WINDOW(userData);
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    webkit_web_view_execute_editing_command(webView, g_action_get_name(G_ACTION(action)));
}

static void insertImageDialogResponse(GtkDialog *dialog, int response, BrowserWindow *window)
{
    if (response == GTK_RESPONSE_ACCEPT) {
        GFile *file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(dialog));
        if (file) {
            char *uri = g_file_get_uri(file);
            WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
            webkit_web_view_execute_editing_command_with_argument(webView, WEBKIT_EDITING_COMMAND_INSERT_IMAGE, uri);
            g_free(uri);
            g_object_unref(file);
        }
    }

#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_window_destroy(GTK_WINDOW(dialog));
#else
    gtk_widget_destroy(GTK_WIDGET(dialog));
#endif
}

static void insertImageCommandCallback(GtkWidget *widget, BrowserWindow *window)
{
    GtkWidget *fileChooser = gtk_file_chooser_dialog_new("Insert Image", GTK_WINDOW(window), GTK_FILE_CHOOSER_ACTION_OPEN,
        "Cancel", GTK_RESPONSE_CANCEL, "Open", GTK_RESPONSE_ACCEPT, NULL);

    GtkFileFilter *filter = gtk_file_filter_new();
    gtk_file_filter_set_name(filter, "Images");
    gtk_file_filter_add_pixbuf_formats(filter);
    gtk_file_chooser_set_filter(GTK_FILE_CHOOSER(fileChooser), filter);

    g_signal_connect(fileChooser, "response", G_CALLBACK(insertImageDialogResponse), window);
    gtk_widget_show(fileChooser);
}

typedef struct {
    GtkWidget *entry;
    BrowserWindow *window;
} InsertLinkDialogData;

static void insertLinkDialogResponse(GtkDialog *dialog, int response, InsertLinkDialogData *data)
{
    if (response == GTK_RESPONSE_ACCEPT) {
#if GTK_CHECK_VERSION(3, 98, 5)
        const char *url = gtk_editable_get_text(GTK_EDITABLE(data->entry));
#else
        const char *url = gtk_entry_get_text(GTK_ENTRY(data->entry));
#endif
        if (url && *url) {
            WebKitWebView *webView = browser_tab_get_web_view(data->window->activeTab);
            webkit_web_view_execute_editing_command_with_argument(webView, WEBKIT_EDITING_COMMAND_CREATE_LINK, url);
        }
    }

#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_window_destroy(GTK_WINDOW(dialog));
#else
    gtk_widget_destroy(GTK_WIDGET(dialog));
#endif

    g_free(data);
}

static void insertLinkCommandCallback(GtkWidget *widget, BrowserWindow *window)
{
    GtkWidget *dialog = gtk_dialog_new_with_buttons("Insert Link", GTK_WINDOW(window), GTK_DIALOG_MODAL, "Insert", GTK_RESPONSE_ACCEPT, NULL);
    gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_ACCEPT);
    GtkWidget *entry = gtk_entry_new();
    gtk_entry_set_placeholder_text(GTK_ENTRY(entry), "URL");
    gtk_entry_set_activates_default(GTK_ENTRY(entry), TRUE);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), entry);
#else
    gtk_container_add(GTK_CONTAINER(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), entry);
    gtk_widget_show(entry);
#endif

    InsertLinkDialogData *data = g_new(InsertLinkDialogData, 1);
    data->entry = entry;
    data->window = window;
    g_signal_connect(dialog, "response", G_CALLBACK(insertLinkDialogResponse), data);
    gtk_widget_show(dialog);
}

static void typingAttributesChanged(WebKitEditorState *editorState, GParamSpec *spec, BrowserWindow *window)
{
    unsigned typingAttributes = webkit_editor_state_get_typing_attributes(editorState);
    GAction *action = g_action_map_lookup_action(G_ACTION_MAP(window->editActionGroup), "Bold");
    g_simple_action_set_state(G_SIMPLE_ACTION(action), g_variant_new_boolean(typingAttributes & WEBKIT_EDITOR_TYPING_ATTRIBUTE_BOLD));
    action = g_action_map_lookup_action(G_ACTION_MAP(window->editActionGroup), "Italic");
    g_simple_action_set_state(G_SIMPLE_ACTION(action), g_variant_new_boolean(typingAttributes & WEBKIT_EDITOR_TYPING_ATTRIBUTE_ITALIC));
    action = g_action_map_lookup_action(G_ACTION_MAP(window->editActionGroup), "Underline");
    g_simple_action_set_state(G_SIMPLE_ACTION(action), g_variant_new_boolean(typingAttributes & WEBKIT_EDITOR_TYPING_ATTRIBUTE_UNDERLINE));
    action = g_action_map_lookup_action(G_ACTION_MAP(window->editActionGroup), "Strikethrough");
    g_simple_action_set_state(G_SIMPLE_ACTION(action), g_variant_new_boolean(typingAttributes & WEBKIT_EDITOR_TYPING_ATTRIBUTE_STRIKETHROUGH));
}

static void browserWindowSaveSession(BrowserWindow *window)
{
    if (!window->sessionFile)
        return;

    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    WebKitWebViewSessionState *state = webkit_web_view_get_session_state(webView);
    GBytes *bytes = webkit_web_view_session_state_serialize(state);
    webkit_web_view_session_state_unref(state);
    g_file_set_contents(window->sessionFile, g_bytes_get_data(bytes, NULL), g_bytes_get_size(bytes), NULL);
    g_bytes_unref(bytes);
    g_clear_pointer(&window->sessionFile, g_free);
}

static void browserWindowFinalize(GObject *gObject)
{
    BrowserWindow *window = BROWSER_WINDOW(gObject);

    g_signal_handlers_disconnect_matched(window->webContext, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, window);
    g_object_unref(window->webContext);

    if (window->favicon) {
        g_object_unref(window->favicon);
        window->favicon = NULL;
    }

    if (window->resetEntryProgressTimeoutId)
        g_source_remove(window->resetEntryProgressTimeoutId);

    g_clear_object(&window->editActionGroup);

    G_OBJECT_CLASS(browser_window_parent_class)->finalize(gObject);
}

static void browserWindowDispose(GObject *gObject)
{
    BrowserWindow *window = BROWSER_WINDOW(gObject);

    browserWindowSaveSession(window);

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

#if GTK_CHECK_VERSION(3, 98, 5)
    g_object_set_data(G_OBJECT(window->backItem), "history-popover", NULL);
    g_object_set_data(G_OBJECT(window->forwardItem), "history-popover", NULL);
#endif

    G_OBJECT_CLASS(browser_window_parent_class)->dispose(gObject);
}

typedef enum {
    TOOLBAR_BUTTON_NORMAL,
    TOOLBAR_BUTTON_TOGGLE,
    TOOLBAR_BUTTON_MENU
} ToolbarButtonType;

static GtkWidget *addToolbarButton(GtkWidget *box, ToolbarButtonType type, const char *iconName, const char *actionName)
{
    GtkWidget *button;
    switch (type) {
    case TOOLBAR_BUTTON_NORMAL:
#if GTK_CHECK_VERSION(3, 98, 5)
        button = gtk_button_new_from_icon_name(iconName);
#else
        button = gtk_button_new_from_icon_name(iconName, GTK_ICON_SIZE_MENU);
#endif
        break;
    case TOOLBAR_BUTTON_TOGGLE:
        button = gtk_toggle_button_new();
#if GTK_CHECK_VERSION(3, 98, 5)
        gtk_button_set_icon_name(GTK_BUTTON(button), iconName);
#else
        gtk_button_set_image(GTK_BUTTON(button), gtk_image_new_from_icon_name(iconName, GTK_ICON_SIZE_MENU));
#endif
        break;
    case TOOLBAR_BUTTON_MENU:
        button = gtk_menu_button_new();
#if GTK_CHECK_VERSION(3, 98, 5)
        gtk_menu_button_set_icon_name(GTK_MENU_BUTTON(button), iconName);
#else
        gtk_button_set_image(GTK_BUTTON(button), gtk_image_new_from_icon_name(iconName, GTK_ICON_SIZE_MENU));
#endif

        break;
    }

    gtk_widget_set_focus_on_click(button, FALSE);
    if (actionName)
        gtk_actionable_set_action_name(GTK_ACTIONABLE(button), actionName);

#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(box), button);
#else
    gtk_container_add(GTK_CONTAINER(box), button);
    gtk_widget_show(button);
#endif

    return button;
}

static const GActionEntry editActions[] = {
    { "Bold", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "Italic", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "Underline", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "Strikethrough", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "Cut", editingActionCallback, NULL, NULL, NULL, { 0 } },
    { "Copy", editingActionCallback, NULL, NULL, NULL, { 0 } },
    { "Paste", editingActionCallback, NULL, NULL, NULL, { 0 } },
    { "Undo", editingActionCallback, NULL, NULL, NULL, { 0 } },
    { "Redo", editingActionCallback, NULL, NULL, NULL, { 0 } },
    { "JustifyLeft", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "JustifyCenter", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "JustifyRight", NULL, NULL, "false", editingActionCallback, { 0 } },
    { "Indent", editingActionCallback, NULL, NULL, NULL, { 0 } },
    { "Outdent", editingActionCallback, NULL, NULL, NULL, { 0 } },
};

static void browserWindowSetupEditorToolbar(BrowserWindow *window)
{
    GtkWidget *toolbar = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
    window->editToolbar = toolbar;
    gtk_widget_set_margin_top(toolbar, 2);
    gtk_widget_set_margin_bottom(toolbar, 2);
    gtk_widget_set_margin_start(toolbar, 2);
    gtk_widget_set_margin_end(toolbar, 2);

    GSimpleActionGroup *actionGroup = g_simple_action_group_new();
    window->editActionGroup = G_ACTION_GROUP(actionGroup);
    g_action_map_add_action_entries(G_ACTION_MAP(actionGroup), editActions, G_N_ELEMENTS(editActions), window);
    gtk_widget_insert_action_group(toolbar, "edit", G_ACTION_GROUP(actionGroup));

    GtkWidget *groupBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(groupBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(groupBox), GTK_STYLE_CLASS_LINKED);
#endif
    addToolbarButton(groupBox, TOOLBAR_BUTTON_TOGGLE, "format-text-bold-symbolic", "edit.Bold");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_TOGGLE, "format-text-italic-symbolic", "edit.Italic");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_TOGGLE, "format-text-underline-symbolic", "edit.Underline");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_TOGGLE, "format-text-strikethrough-symbolic", "edit.Strikethrough");
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), groupBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), groupBox, FALSE, FALSE, 0);
    gtk_widget_show(groupBox);
#endif

    groupBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(groupBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(groupBox), GTK_STYLE_CLASS_LINKED);
#endif
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "edit-cut-symbolic", "edit.Cut");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "edit-copy-symbolic", "edit.Copy");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "edit-paste-symbolic", "edit.Paste");
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), groupBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), groupBox, FALSE, FALSE, 0);
    gtk_widget_show(groupBox);
#endif

    groupBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(groupBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(groupBox), GTK_STYLE_CLASS_LINKED);
#endif
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "edit-undo-symbolic", "edit.Undo");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "edit-redo-symbolic", "edit.Redo");
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), groupBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), groupBox, FALSE, FALSE, 0);
    gtk_widget_show(groupBox);
#endif

    groupBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(groupBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(groupBox), GTK_STYLE_CLASS_LINKED);
#endif
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "format-justify-left-symbolic", "edit.JustifyLeft");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "format-justify-center-symbolic", "edit.JustifyCenter");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "format-justify-right-symbolic", "edit.JustifyRight");
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), groupBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), groupBox, FALSE, FALSE, 0);
    gtk_widget_show(groupBox);
#endif

    groupBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(groupBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(groupBox), GTK_STYLE_CLASS_LINKED);
#endif
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "format-indent-more-symbolic", "edit.Indent");
    addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "format-indent-less-symbolic", "edit.Outdent");
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), groupBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), groupBox, FALSE, FALSE, 0);
    gtk_widget_show(groupBox);
#endif

    groupBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(groupBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(groupBox), GTK_STYLE_CLASS_LINKED);
#endif
    GtkWidget *button = addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "insert-image-symbolic", NULL);
    g_signal_connect(button, "clicked", G_CALLBACK(insertImageCommandCallback), window);
    button = addToolbarButton(groupBox, TOOLBAR_BUTTON_NORMAL, "insert-link-symbolic", NULL);
    g_signal_connect(button, "clicked", G_CALLBACK(insertLinkCommandCallback), window);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), groupBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), groupBox, FALSE, FALSE, 0);
    gtk_widget_show(groupBox);
#endif

#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_insert_child_after(GTK_BOX(window->mainBox), toolbar, window->toolbar);
#else
    gtk_box_pack_start(GTK_BOX(window->mainBox), toolbar, FALSE, FALSE, 0);
    gtk_box_reorder_child(GTK_BOX(window->mainBox), toolbar, 1);
    gtk_widget_show(toolbar);
#endif
}

static void browserWindowSwitchTab(GtkNotebook *notebook, BrowserTab *tab, guint tabIndex, BrowserWindow *window)
{
    if (window->activeTab == tab)
        return;

    if (window->activeTab) {
        browser_tab_set_status_text(window->activeTab, NULL);
        g_clear_object(&window->favicon);

        WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
        g_signal_handlers_disconnect_by_data(webView, window);

        /* We always want close to be connected even for not active tabs */
        g_signal_connect(webView, "close", G_CALLBACK(webViewClose), window);

        WebKitBackForwardList *backForwardlist = webkit_web_view_get_back_forward_list(webView);
        g_signal_handlers_disconnect_by_data(backForwardlist, window);
    }

    window->activeTab = tab;

    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    if (webkit_web_view_is_editable(webView)) {
        browserWindowSetupEditorToolbar(window);
        g_signal_connect(webkit_web_view_get_editor_state(webView), "notify::typing-attributes", G_CALLBACK(typingAttributesChanged), window);
    }
    webViewURIChanged(webView, NULL, window);
    webViewTitleChanged(webView, NULL, window);
    webViewIsLoadingChanged(webView, NULL, window);
    faviconChanged(webView, NULL, window);
    browserWindowUpdateZoomActions(window);
    if (webkit_web_view_is_loading(webView))
        webViewLoadProgressChanged(webView, NULL, window);

    g_signal_connect(webView, "notify::uri", G_CALLBACK(webViewURIChanged), window);
    g_signal_connect(webView, "notify::estimated-load-progress", G_CALLBACK(webViewLoadProgressChanged), window);
    g_signal_connect(webView, "notify::title", G_CALLBACK(webViewTitleChanged), window);
    g_signal_connect(webView, "notify::is-loading", G_CALLBACK(webViewIsLoadingChanged), window);
    g_signal_connect(webView, "create", G_CALLBACK(webViewCreate), window);
    g_signal_connect(webView, "close", G_CALLBACK(webViewClose), window);
    g_signal_connect(webView, "load-failed", G_CALLBACK(webViewLoadFailed), window);
    g_signal_connect(webView, "decide-policy", G_CALLBACK(webViewDecidePolicy), window);
    g_signal_connect(webView, "mouse-target-changed", G_CALLBACK(webViewMouseTargetChanged), window);
    g_signal_connect(webView, "notify::zoom-level", G_CALLBACK(webViewZoomLevelChanged), window);
    g_signal_connect(webView, "notify::favicon", G_CALLBACK(faviconChanged), window);
    g_signal_connect(webView, "enter-fullscreen", G_CALLBACK(webViewEnterFullScreen), window);
    g_signal_connect(webView, "leave-fullscreen", G_CALLBACK(webViewLeaveFullScreen), window);
#if !GTK_CHECK_VERSION(3, 98, 0)
    g_signal_connect(webView, "scroll-event", G_CALLBACK(scrollEventCallback), window);
#endif

    WebKitBackForwardList *backForwardlist = webkit_web_view_get_back_forward_list(webView);
    browserWindowUpdateNavigationMenu(window, backForwardlist);
    g_signal_connect(backForwardlist, "changed", G_CALLBACK(backForwardlistChanged), window);
}

static void browserWindowTabAddedOrRemoved(GtkNotebook *notebook, BrowserTab *tab, guint tabIndex, BrowserWindow *window)
{
    gtk_notebook_set_show_tabs(GTK_NOTEBOOK(window->notebook), gtk_notebook_get_n_pages(notebook) > 1);
}

static void browserWindowBuildPopoverMenu(BrowserWindow *window, GtkWidget *parent)
{
    GMenu *menu = g_menu_new();
    GMenu *section = g_menu_new();
    GMenuItem *item = g_menu_item_new("Zoom Out", "win.zoom-out");
    g_menu_item_set_attribute(item, "verb-icon", "s", "zoom-out-symbolic");
    g_menu_append_item(section, item);
    g_object_unref(item);

    item = g_menu_item_new("Zoom Original", "win.zoom-default");
    g_menu_item_set_attribute(item, "verb-icon", "s", "zoom-original-symbolic");
    g_menu_append_item(section, item);
    g_object_unref(item);

    item = g_menu_item_new("Zoom In", "win.zoom-in");
    g_menu_item_set_attribute(item, "verb-icon", "s", "zoom-in-symbolic");
    g_menu_append_item(section, item);
    g_object_unref(item);

    GMenuItem *sectionItem = g_menu_item_new_section(NULL, G_MENU_MODEL(section));
    g_menu_item_set_attribute(sectionItem, "display-hint", "s", "horizontal-buttons");
    g_menu_append_item(menu, sectionItem);
    g_object_unref(sectionItem);
    g_object_unref(section);

    section = g_menu_new();
    g_menu_insert(section, -1, "_New Private Window", "win.open-private-window");
    g_menu_insert(section, -1, "_Print…", "win.print");
    g_menu_insert(section, -1, "Prefere_nces…", "win.preferences");
    g_menu_insert(section, -1, "_Quit", "win.quit");
    g_menu_append_section(menu, NULL, G_MENU_MODEL(section));
    g_object_unref(section);

#if GTK_CHECK_VERSION(3, 98, 5)
    GtkWidget *popover = gtk_popover_menu_new_from_model(G_MENU_MODEL(menu));
#else
    GtkWidget *popover = gtk_popover_menu_new();
    gtk_popover_bind_model(GTK_POPOVER(popover), G_MENU_MODEL(menu), NULL);
#endif
    g_object_unref(menu);

    gtk_menu_button_set_popover(GTK_MENU_BUTTON(parent), popover);
}

static const GActionEntry actions[] = {
    { "reload", reloadPage, NULL, NULL, NULL, { 0 } },
    { "reload-no-cache", reloadPageIgnoringCache, NULL, NULL, NULL, { 0 } },
    { "reload-stop", reloadOrStopCallback, NULL, NULL, NULL, { 0 } },
    { "toggle-inspector", toggleWebInspector, NULL, NULL, NULL, { 0 } },
    { "open-private-window", openPrivateWindow, NULL, NULL, NULL, { 0 } },
    { "focus-location", focusLocationBar, NULL, NULL, NULL, { 0 } },
    { "stop-load", stopPageLoad, NULL, NULL, NULL, { 0 } },
    { "load-homepage", loadHomePage, NULL, NULL, NULL, { 0 } },
    { "go-back", goBackCallback, NULL, NULL, NULL, { 0 } },
    { "go-forward", goForwardCallback, NULL, NULL, NULL, { 0 } },
    { "zoom-in", zoomInCallback, NULL, NULL, NULL, { 0 } },
    { "zoom-out", zoomOutCallback, NULL, NULL, NULL, { 0 } },
    { "zoom-default", defaultZoomCallback, NULL, NULL, NULL, { 0 } },
    { "find", searchCallback, NULL, NULL, NULL, { 0 } },
    { "preferences", settingsCallback, NULL, NULL, NULL, { 0 } },
    { "new-tab", newTabCallback, NULL, NULL, NULL, { 0 } },
    { "toggle-fullscreen", toggleFullScreen, NULL, NULL, NULL, { 0 } },
    { "print", printPage, NULL, NULL, NULL, { 0 } },
    { "close", browserWindowTryCloseCurrentWebView, NULL, NULL, NULL, { 0 } },
    { "quit", browserWindowTryClose, NULL, NULL, NULL, { 0 } },
};

static void browser_window_init(BrowserWindow *window)
{
    window->backgroundColor.red = window->backgroundColor.green = window->backgroundColor.blue = 255;
    window->backgroundColor.alpha = 1;

    gtk_window_set_title(GTK_WINDOW(window), defaultWindowTitle);
    gtk_window_set_default_size(GTK_WINDOW(window), 800, 600);

    g_action_map_add_action_entries(G_ACTION_MAP(window), actions, G_N_ELEMENTS(actions), window);

    GtkWidget *toolbar = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
    window->toolbar = toolbar;
    gtk_widget_set_margin_top(toolbar, 2);
    gtk_widget_set_margin_bottom(toolbar, 2);
    gtk_widget_set_margin_start(toolbar, 2);
    gtk_widget_set_margin_end(toolbar, 2);

    GtkWidget *navigationBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_widget_add_css_class(navigationBox, GTK_STYLE_CLASS_LINKED);
#else
    gtk_style_context_add_class(gtk_widget_get_style_context(navigationBox), GTK_STYLE_CLASS_LINKED);
#endif

    window->backItem = addToolbarButton(navigationBox, TOOLBAR_BUTTON_NORMAL, "go-previous-symbolic", "win.go-back");
    window->forwardItem = addToolbarButton(navigationBox, TOOLBAR_BUTTON_NORMAL, "go-next-symbolic", "win.go-forward");
#if GTK_CHECK_VERSION(3, 98, 5)
    GtkGesture *gesture = gtk_gesture_click_new();
    gtk_gesture_single_set_button(GTK_GESTURE_SINGLE(gesture), GDK_BUTTON_SECONDARY);
    g_signal_connect(gesture, "pressed", G_CALLBACK(navigationButtonPressed), NULL);
    gtk_widget_add_controller(window->backItem, GTK_EVENT_CONTROLLER(gesture));

    gesture = gtk_gesture_click_new();
    gtk_gesture_single_set_button(GTK_GESTURE_SINGLE(gesture), GDK_BUTTON_SECONDARY);
    g_signal_connect(gesture, "pressed", G_CALLBACK(navigationButtonPressed), NULL);
    gtk_widget_add_controller(window->forwardItem, GTK_EVENT_CONTROLLER(gesture));
#else
    g_signal_connect(window->backItem, "button-press-event", G_CALLBACK(navigationButtonPressCallback), window);
    g_signal_connect(window->forwardItem, "button-press-event", G_CALLBACK(navigationButtonPressCallback), window);
#endif
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), navigationBox);
#else
    gtk_box_pack_start(GTK_BOX(toolbar), navigationBox, FALSE, FALSE, 0);
    gtk_widget_show(navigationBox);
#endif

    addToolbarButton(toolbar, TOOLBAR_BUTTON_NORMAL, "go-home-symbolic", "win.load-homepage");
    addToolbarButton(toolbar, TOOLBAR_BUTTON_NORMAL, "tab-new-symbolic", "win.new-tab");

    window->uriEntry = gtk_entry_new();
    gtk_widget_set_halign(window->uriEntry, GTK_ALIGN_FILL);
    gtk_widget_set_hexpand(window->uriEntry, TRUE);
    g_signal_connect_swapped(window->uriEntry, "activate", G_CALLBACK(activateUriEntryCallback), (gpointer)window);
    gtk_entry_set_icon_activatable(GTK_ENTRY(window->uriEntry), GTK_ENTRY_ICON_PRIMARY, FALSE);
    updateUriEntryIcon(window);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(toolbar), window->uriEntry);
#else
    gtk_container_add(GTK_CONTAINER(toolbar), window->uriEntry);
    gtk_widget_show(window->uriEntry);
#endif

    window->reloadOrStopButton = addToolbarButton(toolbar, TOOLBAR_BUTTON_NORMAL, "view-refresh-symbolic", "win.reload-stop");
    addToolbarButton(toolbar, TOOLBAR_BUTTON_NORMAL, "edit-find-symbolic", "win.find");
    GtkWidget *button = addToolbarButton(toolbar, TOOLBAR_BUTTON_MENU, "open-menu-symbolic", NULL);
    browserWindowBuildPopoverMenu(window, button);

    GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
    window->mainBox = vbox;
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(vbox), toolbar);
#else
    gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0);
    gtk_widget_show(toolbar);
#endif

    window->notebook = gtk_notebook_new();
    g_signal_connect(window->notebook, "switch-page", G_CALLBACK(browserWindowSwitchTab), window);
    g_signal_connect(window->notebook, "page-added", G_CALLBACK(browserWindowTabAddedOrRemoved), window);
    g_signal_connect(window->notebook, "page-removed", G_CALLBACK(browserWindowTabAddedOrRemoved), window);
    gtk_notebook_set_show_tabs(GTK_NOTEBOOK(window->notebook), FALSE);
    gtk_notebook_set_show_border(GTK_NOTEBOOK(window->notebook), FALSE);
#if GTK_CHECK_VERSION(3, 98, 5)
    gtk_box_append(GTK_BOX(window->mainBox), window->notebook);
    gtk_window_set_child(GTK_WINDOW(window), vbox);
#else
    gtk_box_pack_start(GTK_BOX(window->mainBox), window->notebook, TRUE, TRUE, 0);
    gtk_widget_show(window->notebook);
    gtk_container_add(GTK_CONTAINER(window), vbox);
    gtk_widget_show(vbox);
#endif

#if GTK_CHECK_VERSION(3, 98, 5)
    GtkEventController *controller = gtk_event_controller_scroll_new(GTK_EVENT_CONTROLLER_SCROLL_BOTH_AXES);
    gtk_event_controller_set_propagation_phase(controller, GTK_PHASE_CAPTURE);
    g_signal_connect_swapped(controller, "scroll", G_CALLBACK(scrollEventCallback), window);
    gtk_widget_add_controller(GTK_WIDGET(window), controller);
#endif
}

#if GTK_CHECK_VERSION(3, 98, 5)
static gboolean browserWindowCloseRequest(GtkWindow *window)
{
    browserWindowTryClose(NULL, NULL, BROWSER_WINDOW(window));
    return FALSE;
}
#else
static gboolean browserWindowDeleteEvent(GtkWidget *widget, GdkEventAny* event)
{
    browserWindowTryClose(NULL, NULL, BROWSER_WINDOW(widget));
    return TRUE;
}
#endif

static void browser_window_class_init(BrowserWindowClass *klass)
{
    GObjectClass *gobjectClass = G_OBJECT_CLASS(klass);
    gobjectClass->dispose = browserWindowDispose;
    gobjectClass->finalize = browserWindowFinalize;

#if GTK_CHECK_VERSION(3, 98, 5)
    GtkWindowClass *windowClass = GTK_WINDOW_CLASS(klass);
    windowClass->close_request = browserWindowCloseRequest;
#else
    GtkWidgetClass *widgetClass = GTK_WIDGET_CLASS(klass);
    widgetClass->delete_event = browserWindowDeleteEvent;
#endif
}

/* Public API. */
GtkWidget *browser_window_new(GtkWindow *parent, WebKitWebContext *webContext)
{
    g_return_val_if_fail(WEBKIT_IS_WEB_CONTEXT(webContext), NULL);

    BrowserWindow *window = BROWSER_WINDOW(g_object_new(BROWSER_TYPE_WINDOW,
#if !GTK_CHECK_VERSION(3, 98, 0)
        "type", GTK_WINDOW_TOPLEVEL,
#endif
        NULL));

    window->webContext = g_object_ref(webContext);
    g_signal_connect(window->webContext, "download-started", G_CALLBACK(downloadStarted), window);
    if (parent) {
        window->parentWindow = parent;
        g_object_add_weak_pointer(G_OBJECT(parent), (gpointer *)&window->parentWindow);
    }

    return GTK_WIDGET(window);
}

WebKitWebContext *browser_window_get_web_context(BrowserWindow *window)
{
    g_return_val_if_fail(BROWSER_IS_WINDOW(window), NULL);

    return window->webContext;
}

void browser_window_append_view(BrowserWindow *window, WebKitWebView *webView)
{
    g_return_if_fail(BROWSER_IS_WINDOW(window));
    g_return_if_fail(WEBKIT_IS_WEB_VIEW(webView));

    if (window->activeTab && webkit_web_view_is_editable(browser_tab_get_web_view(window->activeTab))) {
        g_warning("Only one tab is allowed in editable mode");
        return;
    }

    GtkWidget *tab = browser_tab_new(webView);
#if !GTK_CHECK_VERSION(3, 98, 0)
    if (gtk_widget_get_app_paintable(GTK_WIDGET(window)))
#endif
        browser_tab_set_background_color(BROWSER_TAB(tab), &window->backgroundColor);
    gtk_notebook_append_page(GTK_NOTEBOOK(window->notebook), tab, browser_tab_get_title_widget(BROWSER_TAB(tab)));
#if GTK_CHECK_VERSION(3, 98, 5)
    g_object_set(gtk_notebook_get_page(GTK_NOTEBOOK(window->notebook), tab), "tab-expand", TRUE, NULL);
#else
    gtk_container_child_set(GTK_CONTAINER(window->notebook), tab, "tab-expand", TRUE, NULL);
#endif
    gtk_widget_show(tab);
}

void browser_window_load_uri(BrowserWindow *window, const char *uri)
{
    g_return_if_fail(BROWSER_IS_WINDOW(window));
    g_return_if_fail(uri);

    browser_tab_load_uri(window->activeTab, uri);
}

void browser_window_load_session(BrowserWindow *window, const char *sessionFile)
{
    g_return_if_fail(BROWSER_IS_WINDOW(window));
    g_return_if_fail(sessionFile);

    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    window->sessionFile = g_strdup(sessionFile);
    gchar *data = NULL;
    gsize dataLength;
    if (g_file_get_contents(sessionFile, &data, &dataLength, NULL)) {
        GBytes *bytes = g_bytes_new_take(data, dataLength);
        WebKitWebViewSessionState *state = webkit_web_view_session_state_new(bytes);
        g_bytes_unref(bytes);

        if (state) {
            webkit_web_view_restore_session_state(webView, state);
            webkit_web_view_session_state_unref(state);
        }
    }

    WebKitBackForwardList *bfList = webkit_web_view_get_back_forward_list(webView);
    WebKitBackForwardListItem *item = webkit_back_forward_list_get_current_item(bfList);
    if (item)
        webkit_web_view_go_to_back_forward_list_item(webView, item);
    else
        webkit_web_view_load_uri(webView, BROWSER_DEFAULT_URL);

}

void browser_window_set_background_color(BrowserWindow *window, GdkRGBA *rgba)
{
    g_return_if_fail(BROWSER_IS_WINDOW(window));
    g_return_if_fail(rgba);

    g_assert(!window->activeTab);

    if (gdk_rgba_equal(rgba, &window->backgroundColor))
        return;

    window->backgroundColor = *rgba;

#if GTK_CHECK_VERSION(3, 98, 5)
    /* FIXME: transparent colors don't work. In GTK4 there's no gtk_widget_set_app_paintable(),
     * what we can do instead is removing the background css class from the window, but that
     * would affect other parts of the window, like toolbar or even title bar background.
     */
#else
    GdkVisual *rgbaVisual = gdk_screen_get_rgba_visual(gtk_window_get_screen(GTK_WINDOW(window)));
    if (!rgbaVisual)
        return;

    gtk_widget_set_visual(GTK_WIDGET(window), rgbaVisual);
    gtk_widget_set_app_paintable(GTK_WIDGET(window), TRUE);
#endif
}

WebKitWebView *browser_window_get_or_create_web_view_for_automation(BrowserWindow *window)
{
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    if (gtk_notebook_get_n_pages(GTK_NOTEBOOK(window->notebook)) == 1 && !webkit_web_view_get_uri(webView)) {
        webkit_web_view_load_uri(webView, "about:blank");
        return webView;
    }

    WebKitWebView *newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
        "web-context", webkit_web_view_get_context(webView),
        "settings", webkit_web_view_get_settings(webView),
        "user-content-manager", webkit_web_view_get_user_content_manager(webView),
        "is-controlled-by-automation", TRUE,
        "website-policies", webkit_web_view_get_website_policies(webView),
        NULL));
    GtkWidget *newWindow = browser_window_new(GTK_WINDOW(window), window->webContext);
    gtk_window_set_application(GTK_WINDOW(newWindow), gtk_window_get_application(GTK_WINDOW(window)));
#if !GTK_CHECK_VERSION(3, 98, 0)
    gtk_window_set_focus_on_map(GTK_WINDOW(newWindow), FALSE);
#endif
    browser_window_append_view(BROWSER_WINDOW(newWindow), newWebView);
    webkit_web_view_load_uri(newWebView, "about:blank");
    gtk_widget_show(newWindow);
    return newWebView;
}

WebKitWebView *browser_window_create_web_view_in_new_tab_for_automation(BrowserWindow *window)
{
    WebKitWebView *webView = browser_tab_get_web_view(window->activeTab);
    WebKitWebView *newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
        "web-context", webkit_web_view_get_context(webView),
        "settings", webkit_web_view_get_settings(webView),
        "user-content-manager", webkit_web_view_get_user_content_manager(webView),
        "is-controlled-by-automation", TRUE,
        "automation-presentation-type", WEBKIT_AUTOMATION_BROWSING_CONTEXT_PRESENTATION_TAB,
        "website-policies", webkit_web_view_get_website_policies(webView),
        NULL));
    browser_window_append_view(window, newWebView);
    webkit_web_view_load_uri(newWebView, "about:blank");
    return newWebView;
}