com.google.gerrit.client.ErrorDialog.java Source code

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Here is the source code for com.google.gerrit.client.ErrorDialog.java

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// Copyright (C) 2008 The Android Open Source Project
//
// 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 com.google.gerrit.client;

import com.google.gerrit.client.rpc.RestApi;
import com.google.gerrit.client.rpc.RpcConstants;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.StatusCodeException;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwtexpui.safehtml.client.SafeHtml;
import com.google.gwtexpui.user.client.PluginSafePopupPanel;
import com.google.gwtjsonrpc.client.RemoteJsonException;

/** A dialog box showing an error message, when bad things happen. */
public class ErrorDialog extends PluginSafePopupPanel {
    private final Label text;
    private final FlowPanel body;
    private final Button closey;

    protected ErrorDialog() {
        super(/* auto hide */false, /* modal */true);
        setGlassEnabled(true);
        getGlassElement().addClassName(Gerrit.RESOURCES.css().errorDialogGlass());

        text = new Label();
        text.setStyleName(Gerrit.RESOURCES.css().errorDialogTitle());

        body = new FlowPanel();

        final FlowPanel buttons = new FlowPanel();
        buttons.setStyleName(Gerrit.RESOURCES.css().errorDialogButtons());

        closey = new Button();
        closey.setText(Gerrit.C.errorDialogContinue());
        closey.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                hide();
            }
        });
        closey.addKeyPressHandler(new KeyPressHandler() {
            @Override
            public void onKeyPress(KeyPressEvent event) {
                // if the close button is triggered by a key we need to consume the key
                // event, otherwise the key event would be propagated to the parent
                // screen and eventually trigger some unwanted action there after the
                // error dialog was closed
                event.stopPropagation();
            }
        });
        buttons.add(closey);

        final FlowPanel center = new FlowPanel();
        center.add(text);
        center.add(body);
        center.add(buttons);

        setText(Gerrit.C.errorDialogTitle());
        addStyleName(Gerrit.RESOURCES.css().errorDialog());
        add(center);

        int l = Window.getScrollLeft() + 20;
        int t = Window.getScrollTop() + 20;
        setPopupPosition(l, t);
    }

    /** Create a dialog box to show a single message string. */
    public ErrorDialog(final String message) {
        this();
        body.add(new Label(message));
    }

    /** Create a dialog box to show a single message string. */
    public ErrorDialog(final SafeHtml message) {
        this();
        body.add(message.toBlockWidget());
    }

    public ErrorDialog(final Widget w) {
        this();
        body.add(w);
    }

    /** Create a dialog box to nicely format an exception. */
    public ErrorDialog(final Throwable what) {
        this();

        String hdr;
        String msg;

        if (what instanceof StatusCodeException) {
            StatusCodeException sc = (StatusCodeException) what;
            if (RestApi.isExpected(sc.getStatusCode())) {
                hdr = null;
                msg = sc.getEncodedResponse();
            } else if (sc.getStatusCode() == Response.SC_INTERNAL_SERVER_ERROR) {
                hdr = null;
                msg = what.getMessage();
            } else {
                hdr = RpcConstants.C.errorServerUnavailable();
                msg = what.getMessage();
            }

        } else if (what instanceof RemoteJsonException) {
            // TODO Remove RemoteJsonException from Gerrit sources.
            hdr = RpcConstants.C.errorRemoteJsonException();
            msg = what.getMessage();

        } else {
            // TODO Fix callers of ErrorDialog to stop passing random types.
            hdr = what.getClass().getName();
            if (hdr.startsWith("java.lang.")) {
                hdr = hdr.substring("java.lang.".length());
            } else if (hdr.startsWith("com.google.gerrit.")) {
                hdr = hdr.substring(hdr.lastIndexOf('.') + 1);
            }
            if (hdr.endsWith("Exception")) {
                hdr = hdr.substring(0, hdr.length() - "Exception".length());
            } else if (hdr.endsWith("Error")) {
                hdr = hdr.substring(0, hdr.length() - "Error".length());
            }
            msg = what.getMessage();
        }

        if (hdr != null) {
            final Label r = new Label(hdr);
            r.setStyleName(Gerrit.RESOURCES.css().errorDialogErrorType());
            body.add(r);
        }

        if (msg != null) {
            final Label m = new Label(msg);
            DOM.setStyleAttribute(m.getElement(), "whiteSpace", "pre");
            body.add(m);
        }
    }

    public void setText(final String t) {
        text.setText(t);
    }

    @Override
    public void center() {
        show();
        closey.setFocus(true);
    }
}