cc.alcina.extras.misc.ie.client.AugmentedUncaughtExceptionHandler.java Source code

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Here is the source code for cc.alcina.extras.misc.ie.client.AugmentedUncaughtExceptionHandler.java

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/* 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package cc.alcina.extras.misc.ie.client;

import java.util.List;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.Window;

import cc.alcina.framework.common.client.WrappedRuntimeException;
import cc.alcina.framework.common.client.WrappedRuntimeException.SuggestedAction;
import cc.alcina.framework.common.client.util.CommonUtils;
import cc.alcina.framework.gwt.client.browsermod.BrowserMod;
import cc.alcina.framework.gwt.client.logic.ClientExceptionHandler;

/**
 * Better stacktrace etc support for IE
 * 
 * @author nick@alcina.cc TODO
 */
public class AugmentedUncaughtExceptionHandler implements CloseHandler<Window> {
    private static UncaughtExceptionHandler handler;

    public static void throwToHandler(String message) {
        List<Throwable> lastGwtThrowables = getLastThrowables();
        String gwtExceptionMessage = "";
        if (lastGwtThrowables != null) {
            StringBuilder builder = new StringBuilder();
            for (Throwable t : lastGwtThrowables) {
                if (handler instanceof ClientExceptionHandler) {
                    if (((ClientExceptionHandler) handler).handleNetworkException(t)) {
                        return;
                    }
                }
                ClientExceptionHandler.unrollUmbrella(t, builder);
            }
            gwtExceptionMessage = "\n\n-------\n(gwt)\n\n" + builder.toString();
        }
        handler.onUncaughtException(new WrappedRuntimeException(
                CommonUtils.formatJ("%s%s", message, gwtExceptionMessage), SuggestedAction.NOTIFY_WARNING));
    }

    private static native List<Throwable> getLastThrowables() /*-{
                                                              return $wnd.__com_google_gwt_core_client_impl_Impl_ieThrowables;
                                                              }-*/;

    public void onClose(CloseEvent<Window> event) {
        deregisterWindowErrorListener();
    }

    public void onWindowClosed() {
        deregisterWindowErrorListener();
    }

    public void registerUncaughtExceptionHandler(UncaughtExceptionHandler handler) {
        if (GWT.isScript() && BrowserMod.isInternetExplorer() && !BrowserMod.isIE10Plus()) {
            AugmentedUncaughtExceptionHandler.handler = handler;
            registerIEWindowErrorListener();
            Window.addCloseHandler(this);
            disableEventBusExceptionCatch();
        } else {
            GWT.setUncaughtExceptionHandler(handler);
        }
    }

    private native void deregisterWindowErrorListener() /*-{
                                                        $wnd.onerror = null;
                                                        window.onerror = null;
                                                        }-*/;

    private native void disableEventBusExceptionCatch() /*-{
                                                        $wnd.__com_google_web_bindery_event_shared_SimpleEventBus_disableEventBusExceptionCatch = true;
                                                        }-*/;

    private native void registerIEWindowErrorListener() /*-{
                                                        function AugmentedUncaughtExceptionHandler_windowErrorHandler(sMsg, sUrl, sLine) {
                                                        var message = "\n\nMessage: " + sMsg + "\nLine: " + sLine + "\nUrl: " + sUrl;
                                                        @cc.alcina.extras.misc.ie.client.AugmentedUncaughtExceptionHandler::throwToHandler(Ljava/lang/String;)(message);
                                                        }
                                                        $wnd.onerror = AugmentedUncaughtExceptionHandler_windowErrorHandler;
                                                        window.onerror = AugmentedUncaughtExceptionHandler_windowErrorHandler;
                                                        }-*/;
}