/*
 * 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. ``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
 * 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.
 */

#include "cmakeconfig.h"

#include "BrowserWindow.h"
#include <JavaScriptCore/JavaScript.h>
#include <errno.h>
#include <gtk/gtk.h>
#include <string.h>
#include <webkit2/webkit2.h>

#define MINI_BROWSER_ERROR (miniBrowserErrorQuark())

static const gchar **uriArguments = NULL;
static GdkRGBA *backgroundColor;
static gboolean editorMode;
static const char *sessionFile;
static char *geometry;
static gboolean privateMode;

typedef enum {
    MINI_BROWSER_ERROR_INVALID_ABOUT_PATH
} MiniBrowserError;

static GQuark miniBrowserErrorQuark()
{
    return g_quark_from_string("minibrowser-quark");
}

static gchar *argumentToURL(const char *filename)
{
    GFile *gfile = g_file_new_for_commandline_arg(filename);
    gchar *fileURL = g_file_get_uri(gfile);
    g_object_unref(gfile);

    return fileURL;
}

static WebKitWebView *createBrowserTab(BrowserWindow *window, WebKitSettings *webkitSettings, WebKitUserContentManager *userContentManager)
{
    WebKitWebView *webView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
        "web-context", browser_window_get_web_context(window),
        "settings", webkitSettings,
        "user-content-manager", userContentManager,
        NULL));

    if (editorMode)
        webkit_web_view_set_editable(webView, TRUE);

    browser_window_append_view(window, webView);
    return webView;
}

static gboolean parseBackgroundColor(const char *optionName, const char *value, gpointer data, GError **error)
{
    GdkRGBA rgba;
    if (gdk_rgba_parse(&rgba, value)) {
        backgroundColor = gdk_rgba_copy(&rgba);
        return TRUE;
    }

    g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED, "Failed to parse '%s' as RGBA color", value);
    return FALSE;
}

static const GOptionEntry commandLineOptions[] =
{
    { "bg-color", 0, 0, G_OPTION_ARG_CALLBACK, parseBackgroundColor, "Background color", NULL },
    { "editor-mode", 'e', 0, G_OPTION_ARG_NONE, &editorMode, "Run in editor mode", NULL },
    { "session-file", 's', 0, G_OPTION_ARG_FILENAME, &sessionFile, "Session file", "FILE" },
    { "geometry", 'g', 0, G_OPTION_ARG_STRING, &geometry, "Set the size and position of the window (WIDTHxHEIGHT+X+Y)", "GEOMETRY" },
    { "private", 'p', 0, G_OPTION_ARG_NONE, &privateMode, "Run in private browsing mode", NULL },
    { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &uriArguments, 0, "[URL…]" },
    { 0, 0, 0, 0, 0, 0, 0 }
};

static gboolean parseOptionEntryCallback(const gchar *optionNameFull, const gchar *value, WebKitSettings *webSettings, GError **error)
{
    if (strlen(optionNameFull) <= 2) {
        g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED, "Invalid option %s", optionNameFull);
        return FALSE;
    }

    /* We have two -- in option name so remove them. */
    const gchar *optionName = optionNameFull + 2;
    GParamSpec *spec = g_object_class_find_property(G_OBJECT_GET_CLASS(webSettings), optionName);
    if (!spec) {
        g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED, "Cannot find web settings for option %s", optionNameFull);
        return FALSE;
    }

    switch (G_PARAM_SPEC_VALUE_TYPE(spec)) {
    case G_TYPE_BOOLEAN: {
        gboolean propertyValue = !(value && g_ascii_strcasecmp(value, "true") && strcmp(value, "1"));
        g_object_set(G_OBJECT(webSettings), optionName, propertyValue, NULL);
        break;
    }
    case G_TYPE_STRING:
        g_object_set(G_OBJECT(webSettings), optionName, value, NULL);
        break;
    case G_TYPE_INT: {
        glong propertyValue;
        gchar *end;

        errno = 0;
        propertyValue = g_ascii_strtoll(value, &end, 0);
        if (errno == ERANGE || propertyValue > G_MAXINT || propertyValue < G_MININT) {
            g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, "Integer value '%s' for %s out of range", value, optionNameFull);
            return FALSE;
        }
        if (errno || value == end) {
            g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, "Cannot parse integer value '%s' for %s", value, optionNameFull);
            return FALSE;
        }
        g_object_set(G_OBJECT(webSettings), optionName, propertyValue, NULL);
        break;
    }
    case G_TYPE_FLOAT: {
        gdouble propertyValue;
        gchar *end;

        errno = 0;
        propertyValue = g_ascii_strtod(value, &end);
        if (errno == ERANGE || propertyValue > G_MAXFLOAT || propertyValue < G_MINFLOAT) {
            g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, "Float value '%s' for %s out of range", value, optionNameFull);
            return FALSE;
        }
        if (errno || value == end) {
            g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, "Cannot parse float value '%s' for %s", value, optionNameFull);
            return FALSE;
        }
        g_object_set(G_OBJECT(webSettings), optionName, propertyValue, NULL);
        break;
    }
    default:
        g_assert_not_reached();
    }

    return TRUE;
}

static gboolean isValidParameterType(GType gParamType)
{
    return (gParamType == G_TYPE_BOOLEAN || gParamType == G_TYPE_STRING || gParamType == G_TYPE_INT
            || gParamType == G_TYPE_FLOAT);
}

static GOptionEntry* getOptionEntriesFromWebKitSettings(WebKitSettings *webSettings)
{
    GParamSpec **propertySpecs;
    GOptionEntry *optionEntries;
    guint numProperties, numEntries, i;

    propertySpecs = g_object_class_list_properties(G_OBJECT_GET_CLASS(webSettings), &numProperties);
    if (!propertySpecs)
        return NULL;

    optionEntries = g_new0(GOptionEntry, numProperties + 1);
    numEntries = 0;
    for (i = 0; i < numProperties; i++) {
        GParamSpec *param = propertySpecs[i];

        /* Fill in structures only for writable and not construct-only properties. */
        if (!param || !(param->flags & G_PARAM_WRITABLE) || (param->flags & G_PARAM_CONSTRUCT_ONLY))
            continue;

        GType gParamType = G_PARAM_SPEC_VALUE_TYPE(param);
        if (!isValidParameterType(gParamType))
            continue;

        GOptionEntry *optionEntry = &optionEntries[numEntries++];
        optionEntry->long_name = g_param_spec_get_name(param);

        /* There is no easy way to figure our short name for generated option entries.
           optionEntry.short_name=*/
        /* For bool arguments "enable" type make option argument not required. */
        if (gParamType == G_TYPE_BOOLEAN && (strstr(optionEntry->long_name, "enable")))
            optionEntry->flags = G_OPTION_FLAG_OPTIONAL_ARG;
        optionEntry->arg = G_OPTION_ARG_CALLBACK;
        optionEntry->arg_data = parseOptionEntryCallback;
        optionEntry->description = g_param_spec_get_blurb(param);
        optionEntry->arg_description = g_type_name(gParamType);
    }
    g_free(propertySpecs);

    return optionEntries;
}

static gboolean addSettingsGroupToContext(GOptionContext *context, WebKitSettings* webkitSettings)
{
    GOptionEntry *optionEntries = getOptionEntriesFromWebKitSettings(webkitSettings);
    if (!optionEntries)
        return FALSE;

    GOptionGroup *webSettingsGroup = g_option_group_new("websettings",
                                                        "WebKitSettings writable properties for default WebKitWebView",
                                                        "WebKitSettings properties",
                                                        webkitSettings,
                                                        NULL);
    g_option_group_add_entries(webSettingsGroup, optionEntries);
    g_free(optionEntries);

    /* Option context takes ownership of the group. */
    g_option_context_add_group(context, webSettingsGroup);

    return TRUE;
}

typedef struct {
    WebKitURISchemeRequest *request;
    GList *dataList;
    GHashTable *dataMap;
} AboutDataRequest;

static GHashTable *aboutDataRequestMap;

static void aboutDataRequestFree(AboutDataRequest *request)
{
    if (!request)
        return;

    g_list_free_full(request->dataList, g_object_unref);

    if (request->request)
        g_object_unref(request->request);
    if (request->dataMap)
        g_hash_table_destroy(request->dataMap);

    g_slice_free(AboutDataRequest, request);
}

static AboutDataRequest* aboutDataRequestNew(WebKitURISchemeRequest *uriRequest)
{
    if (!aboutDataRequestMap)
        aboutDataRequestMap = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, (GDestroyNotify)aboutDataRequestFree);

    AboutDataRequest *request = g_slice_new0(AboutDataRequest);
    request->request = g_object_ref(uriRequest);
    g_hash_table_insert(aboutDataRequestMap, GUINT_TO_POINTER(webkit_web_view_get_page_id(webkit_uri_scheme_request_get_web_view(request->request))), request);

    return request;
}

static AboutDataRequest *aboutDataRequestForView(guint64 pageID)
{
    return aboutDataRequestMap ? g_hash_table_lookup(aboutDataRequestMap, GUINT_TO_POINTER(pageID)) : NULL;
}

static void websiteDataRemovedCallback(WebKitWebsiteDataManager *manager, GAsyncResult *result, AboutDataRequest *dataRequest)
{
    if (webkit_website_data_manager_remove_finish(manager, result, NULL))
        webkit_web_view_reload(webkit_uri_scheme_request_get_web_view(dataRequest->request));
}

static void websiteDataClearedCallback(WebKitWebsiteDataManager *manager, GAsyncResult *result, AboutDataRequest *dataRequest)
{
    if (webkit_website_data_manager_clear_finish(manager, result, NULL))
        webkit_web_view_reload(webkit_uri_scheme_request_get_web_view(dataRequest->request));
}

static void aboutDataScriptMessageReceivedCallback(WebKitUserContentManager *userContentManager, WebKitJavascriptResult *message, WebKitWebContext *webContext)
{
    JSValueRef jsValue = webkit_javascript_result_get_value(message);
    JSStringRef jsString = JSValueToStringCopy(webkit_javascript_result_get_global_context(message), jsValue, NULL);
    size_t maxSize = JSStringGetMaximumUTF8CStringSize(jsString);
    if (!maxSize) {
        JSStringRelease(jsString);
        return;
    }
    char *messageString = g_malloc(maxSize);
    JSStringGetUTF8CString(jsString, messageString, maxSize);
    JSStringRelease(jsString);

    char **tokens = g_strsplit(messageString, ":", 3);
    g_free(messageString);

    unsigned tokenCount = g_strv_length(tokens);
    if (!tokens || tokenCount < 2) {
        g_strfreev(tokens);
        return;
    }

    guint64 pageID = g_ascii_strtoull(tokens[0], NULL, 10);
    AboutDataRequest *dataRequest = aboutDataRequestForView(pageID);
    if (!dataRequest) {
        g_strfreev(tokens);
        return;
    }

    WebKitWebsiteDataManager *manager = webkit_web_context_get_website_data_manager(webContext);
    guint64 types = g_ascii_strtoull(tokens[1], NULL, 10);
    if (tokenCount == 2)
        webkit_website_data_manager_clear(manager, types, 0, NULL, (GAsyncReadyCallback)websiteDataClearedCallback, dataRequest);
    else {
        guint64 domainID = g_ascii_strtoull(tokens[2], NULL, 10);
        GList *dataList = g_hash_table_lookup(dataRequest->dataMap, GUINT_TO_POINTER(types));
        WebKitWebsiteData *data = g_list_nth_data(dataList, domainID);
        if (data) {
            GList dataList = { data, NULL, NULL };
            webkit_website_data_manager_remove(manager, types, &dataList, NULL, (GAsyncReadyCallback)websiteDataRemovedCallback, dataRequest);
        }
    }
    g_strfreev(tokens);
}

static void domainListFree(GList *domains)
{
    g_list_free_full(domains, (GDestroyNotify)webkit_website_data_unref);
}

static void aboutDataFillTable(GString *result, AboutDataRequest *dataRequest, GList* dataList, const char *title, WebKitWebsiteDataTypes types, const char *dataPath, guint64 pageID)
{
    guint64 totalDataSize = 0;
    GList *domains = NULL;
    GList *l;
    for (l = dataList; l; l = g_list_next(l)) {
        WebKitWebsiteData *data = (WebKitWebsiteData *)l->data;

        if (webkit_website_data_get_types(data) & types) {
            domains = g_list_prepend(domains, webkit_website_data_ref(data));
            totalDataSize += webkit_website_data_get_size(data, types);
        }
    }
    if (!domains)
        return;

    if (!dataRequest->dataMap)
        dataRequest->dataMap = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, (GDestroyNotify)domainListFree);
    g_hash_table_insert(dataRequest->dataMap, GUINT_TO_POINTER(types), domains);

    if (totalDataSize) {
        char *totalDataSizeStr = g_format_size(totalDataSize);
        g_string_append_printf(result, "<h1>%s (%s)</h1>\n<table>\n", title, totalDataSizeStr);
        g_free(totalDataSizeStr);
    } else
        g_string_append_printf(result, "<h1>%s</h1>\n<table>\n", title);
    if (dataPath)
        g_string_append_printf(result, "<tr><td colspan=\"2\">Path: %s</td></tr>\n", dataPath);

    unsigned index;
    for (l = domains, index = 0; l; l = g_list_next(l), index++) {
        WebKitWebsiteData *data = (WebKitWebsiteData *)l->data;
        const char *displayName = webkit_website_data_get_name(data);
        guint64 dataSize = webkit_website_data_get_size(data, types);
        if (dataSize) {
            char *dataSizeStr = g_format_size(dataSize);
            g_string_append_printf(result, "<tr><td>%s (%s)</td>", displayName, dataSizeStr);
            g_free(dataSizeStr);
        } else
            g_string_append_printf(result, "<tr><td>%s</td>", displayName);
        g_string_append_printf(result, "<td><input type=\"button\" value=\"Remove\" onclick=\"removeData('%"G_GUINT64_FORMAT":%u:%u');\"></td></tr>\n",
            pageID, types, index);
    }
    g_string_append_printf(result, "<tr><td><input type=\"button\" value=\"Clear all\" onclick=\"clearData('%"G_GUINT64_FORMAT":%u');\"></td></tr></table>\n",
        pageID, types);
}

static void gotWebsiteDataCallback(WebKitWebsiteDataManager *manager, GAsyncResult *asyncResult, AboutDataRequest *dataRequest)
{
    GList *dataList = webkit_website_data_manager_fetch_finish(manager, asyncResult, NULL);

    GString *result = g_string_new(
        "<html><head>"
        "<script>"
        "  function removeData(domain) {"
        "    window.webkit.messageHandlers.aboutData.postMessage(domain);"
        "  }"
        "  function clearData(dataType) {"
        "    window.webkit.messageHandlers.aboutData.postMessage(dataType);"
        "  }"
        "</script></head><body>\n");

    guint64 pageID = webkit_web_view_get_page_id(webkit_uri_scheme_request_get_web_view(dataRequest->request));
    aboutDataFillTable(result, dataRequest, dataList, "Cookies", WEBKIT_WEBSITE_DATA_COOKIES, NULL, pageID);
    aboutDataFillTable(result, dataRequest, dataList, "Memory Cache", WEBKIT_WEBSITE_DATA_MEMORY_CACHE, NULL, pageID);
    aboutDataFillTable(result, dataRequest, dataList, "Disk Cache", WEBKIT_WEBSITE_DATA_DISK_CACHE, webkit_website_data_manager_get_disk_cache_directory(manager), pageID);
    aboutDataFillTable(result, dataRequest, dataList, "Session Storage", WEBKIT_WEBSITE_DATA_SESSION_STORAGE, NULL, pageID);
    aboutDataFillTable(result, dataRequest, dataList, "Local Storage", WEBKIT_WEBSITE_DATA_LOCAL_STORAGE, webkit_website_data_manager_get_local_storage_directory(manager), pageID);
    aboutDataFillTable(result, dataRequest, dataList, "WebSQL Databases", WEBKIT_WEBSITE_DATA_WEBSQL_DATABASES, webkit_website_data_manager_get_websql_directory(manager), pageID);
    aboutDataFillTable(result, dataRequest, dataList, "IndexedDB Databases", WEBKIT_WEBSITE_DATA_INDEXEDDB_DATABASES, webkit_website_data_manager_get_indexeddb_directory(manager), pageID);
    aboutDataFillTable(result, dataRequest, dataList, "Plugins Data", WEBKIT_WEBSITE_DATA_PLUGIN_DATA, NULL, pageID);
    aboutDataFillTable(result, dataRequest, dataList, "Offline Web Applications Cache", WEBKIT_WEBSITE_DATA_OFFLINE_APPLICATION_CACHE, webkit_website_data_manager_get_offline_application_cache_directory(manager), pageID);

    result = g_string_append(result, "</body></html>");
    gsize streamLength = result->len;
    GInputStream *stream = g_memory_input_stream_new_from_data(g_string_free(result, FALSE), streamLength, g_free);
    webkit_uri_scheme_request_finish(dataRequest->request, stream, streamLength, "text/html");
    g_list_free_full(dataList, (GDestroyNotify)webkit_website_data_unref);
}

static void aboutDataHandleRequest(WebKitURISchemeRequest *request, WebKitWebContext *webContext)
{
    AboutDataRequest *dataRequest = aboutDataRequestNew(request);
    WebKitWebsiteDataManager *manager = webkit_web_context_get_website_data_manager(webContext);
    webkit_website_data_manager_fetch(manager, WEBKIT_WEBSITE_DATA_ALL, NULL, (GAsyncReadyCallback)gotWebsiteDataCallback, dataRequest);
}

static void aboutURISchemeRequestCallback(WebKitURISchemeRequest *request, WebKitWebContext *webContext)
{
    GInputStream *stream;
    gsize streamLength;
    const gchar *path;
    gchar *contents;
    GError *error;

    path = webkit_uri_scheme_request_get_path(request);
    if (!g_strcmp0(path, "minibrowser")) {
        contents = g_strdup_printf("<html><body><h1>WebKitGTK+ MiniBrowser</h1><p>The WebKit2 test browser of the GTK+ port.</p><p>WebKit version: %d.%d.%d</p></body></html>",
            webkit_get_major_version(),
            webkit_get_minor_version(),
            webkit_get_micro_version());
        streamLength = strlen(contents);
        stream = g_memory_input_stream_new_from_data(contents, streamLength, g_free);

        webkit_uri_scheme_request_finish(request, stream, streamLength, "text/html");
        g_object_unref(stream);
    } else if (!g_strcmp0(path, "data"))
        aboutDataHandleRequest(request, webContext);
    else {
        error = g_error_new(MINI_BROWSER_ERROR, MINI_BROWSER_ERROR_INVALID_ABOUT_PATH, "Invalid about:%s page.", path);
        webkit_uri_scheme_request_finish_error(request, error);
        g_error_free(error);
    }
}

int main(int argc, char *argv[])
{
    gtk_init(&argc, &argv);
#if ENABLE_DEVELOPER_MODE
    g_setenv("WEBKIT_INJECTED_BUNDLE_PATH", WEBKIT_INJECTED_BUNDLE_PATH, FALSE);
#endif

    GOptionContext *context = g_option_context_new(NULL);
    g_option_context_add_main_entries(context, commandLineOptions, 0);
    g_option_context_add_group(context, gtk_get_option_group(TRUE));

    WebKitSettings *webkitSettings = webkit_settings_new();
    webkit_settings_set_enable_developer_extras(webkitSettings, TRUE);
    webkit_settings_set_enable_webgl(webkitSettings, TRUE);
    webkit_settings_set_enable_media_stream(webkitSettings, TRUE);
    if (!addSettingsGroupToContext(context, webkitSettings))
        g_clear_object(&webkitSettings);

    GError *error = 0;
    if (!g_option_context_parse(context, &argc, &argv, &error)) {
        g_printerr("Cannot parse arguments: %s\n", error->message);
        g_error_free(error);
        g_option_context_free(context);

        return 1;
    }
    g_option_context_free (context);

    WebKitWebContext *webContext = privateMode ? webkit_web_context_new_ephemeral() : webkit_web_context_get_default();

    const gchar *singleprocess = g_getenv("MINIBROWSER_SINGLEPROCESS");
    webkit_web_context_set_process_model(webContext, (singleprocess && *singleprocess) ?
        WEBKIT_PROCESS_MODEL_SHARED_SECONDARY_PROCESS : WEBKIT_PROCESS_MODEL_MULTIPLE_SECONDARY_PROCESSES);

    // Enable the favicon database, by specifying the default directory.
    webkit_web_context_set_favicon_database_directory(webContext, NULL);

    webkit_web_context_register_uri_scheme(webContext, BROWSER_ABOUT_SCHEME, (WebKitURISchemeRequestCallback)aboutURISchemeRequestCallback, webContext, NULL);

    WebKitUserContentManager *userContentManager = webkit_user_content_manager_new();
    webkit_user_content_manager_register_script_message_handler(userContentManager, "aboutData");
    g_signal_connect(userContentManager, "script-message-received::aboutData", G_CALLBACK(aboutDataScriptMessageReceivedCallback), webContext);

    BrowserWindow *mainWindow = BROWSER_WINDOW(browser_window_new(NULL, webContext));
    if (geometry)
        gtk_window_parse_geometry(GTK_WINDOW(mainWindow), geometry);

    GtkWidget *firstTab = NULL;
    if (uriArguments) {
        int i;

        for (i = 0; uriArguments[i]; i++) {
            WebKitWebView *webView = createBrowserTab(mainWindow, webkitSettings, userContentManager);
            if (!i)
                firstTab = GTK_WIDGET(webView);
            gchar *url = argumentToURL(uriArguments[i]);
            webkit_web_view_load_uri(webView, url);
            g_free(url);
        }
    } else {
        WebKitWebView *webView = createBrowserTab(mainWindow, webkitSettings, userContentManager);
        firstTab = GTK_WIDGET(webView);

        if (backgroundColor)
            browser_window_set_background_color(mainWindow, backgroundColor);

        if (!editorMode) {
            if (sessionFile)
                browser_window_load_session(mainWindow, sessionFile);
            else
                webkit_web_view_load_uri(webView, BROWSER_DEFAULT_URL);
        }
    }

    gtk_widget_grab_focus(firstTab);
    gtk_widget_show(GTK_WIDGET(mainWindow));

    g_clear_object(&webkitSettings);
    g_clear_object(&userContentManager);

    gtk_main();

    if (privateMode)
        g_object_unref(webContext);

    return 0;
}