/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsGDKErrorHandler.h"

#include <gtk/gtk.h>

#include <gdk/gdkx.h>

#include <errno.h>

#include <stdlib.h>

#include <string.h>

#include "nsDebug.h"

#include "nsString.h"

#include "nsX11ErrorHandler.h"

#include "prenv.h"

/* See https://bugzilla.gnome.org/show_bug.cgi?id=629608#c8

 *

 * GDK implements X11 error traps to ignore X11 errors.

 * Unfortunatelly We don't know which X11 events can be ignored

 * so we have to utilize the Gdk error handler to avoid

 * false alarms in Gtk3.

 */

static void

GdkErrorHandler(const gchar *log_domain, GLogLevelFlags log_level,

                const gchar *message,  gpointer user_data)

{

  if (strstr(message, "X Window System error")) {

    XErrorEvent event;

    nsDependentCString buffer(message);

    char *endptr;

    /* Parse Gdk X Window error message which has this format:

     * (Details: serial XXXX error_code XXXX request_code XXXX (XXXX) minor_code XXXX)

     */

    NS_NAMED_LITERAL_CSTRING(serialString, "(Details: serial ");

    int32_t start = buffer.Find(serialString);

    if (start == kNotFound)

      MOZ_CRASH_UNSAFE_OOL(message);

    start += serialString.Length();

    errno = 0;

    event.serial = strtol(buffer.BeginReading() + start, &endptr, 10);

    if (errno)

      MOZ_CRASH_UNSAFE_OOL(message);

    NS_NAMED_LITERAL_CSTRING(errorCodeString, " error_code ");

    if (!StringBeginsWith(Substring(endptr, buffer.EndReading()), errorCodeString))

      MOZ_CRASH_UNSAFE_OOL(message);

    errno = 0;

    event.error_code = strtol(endptr + errorCodeString.Length(), &endptr, 10);

    if (errno)

      MOZ_CRASH_UNSAFE_OOL(message);

    NS_NAMED_LITERAL_CSTRING(requestCodeString, " request_code ");

    if (!StringBeginsWith(Substring(endptr, buffer.EndReading()), requestCodeString))

      MOZ_CRASH_UNSAFE_OOL(message);

    errno = 0;

    event.request_code = strtol(endptr + requestCodeString.Length(), &endptr, 10);

    if (errno)

      MOZ_CRASH_UNSAFE_OOL(message);

    NS_NAMED_LITERAL_CSTRING(minorCodeString, " minor_code ");

    start = buffer.Find(minorCodeString, /* aIgnoreCase = */ false,

                        endptr - buffer.BeginReading());

    if (!start)

      MOZ_CRASH_UNSAFE_OOL(message);

    errno = 0;

    event.minor_code = strtol(buffer.BeginReading() + start + minorCodeString.Length(), nullptr, 10);

    if (errno)

      MOZ_CRASH_UNSAFE_OOL(message);

    event.display = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());

    // Gdk does not provide resource ID

    event.resourceid = 0;

    X11Error(event.display, &event);

  } else {

    g_log_default_handler(log_domain, log_level, message, user_data);

    MOZ_CRASH_UNSAFE_OOL(message);

  }

}

void

InstallGdkErrorHandler()

{

  g_log_set_handler("Gdk",

                    (GLogLevelFlags)(G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION),

                    GdkErrorHandler,

                    nullptr);

  if (PR_GetEnv("MOZ_X_SYNC")) {

    XSynchronize(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), True);

  }

}