stroom.alert.client.view.CommonAlertViewImpl.java Source code

Introduction

Here is the source code for stroom.alert.client.view.CommonAlertViewImpl.java

Source

/*
 * Copyright 2016 Crown Copyright
 *
 * 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 stroom.alert.client.view;

import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.IFrameElement;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.InitializeEvent;
import com.google.gwt.event.logical.shared.InitializeHandler;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.resources.client.CssResource.ImportedWithPrefix;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Hyperlink;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;
import com.gwtplatform.mvp.client.ViewImpl;

import stroom.alert.client.presenter.CommonAlertPresenter.CommonAlertView;

public class CommonAlertViewImpl extends ViewImpl implements CommonAlertView {
    private static final int MAX_MESSAGE_LENGTH = 1000;

    private final HorizontalPanel widget = new HorizontalPanel();
    private final VerticalPanel messageArea = new VerticalPanel();
    private final Image image = new Image();
    private final HTML message = new HTML();
    private final Hyperlink showHideDetail = new Hyperlink();
    private final RichTextArea detail = new RichTextArea();

    @ImportedWithPrefix("stroom-alert")
    public interface Style extends CssResource {
        String DEFAULT_CSS = "alert.css";

        String table();

        String message();

        String showHide();

        String detail();
    }

    public interface Resources extends ClientBundle {
        ImageResource info();

        ImageResource warn();

        ImageResource error();

        ImageResource question();

        @Source(Style.DEFAULT_CSS)
        Style style();
    }

    private final Resources resources;
    private boolean detailVisible = false;

    @Inject
    public CommonAlertViewImpl(final Resources resources) {
        this.resources = resources;

        resources.style().ensureInjected();

        widget.add(image);
        widget.add(messageArea);

        messageArea.add(message);
        messageArea.add(showHideDetail);
        messageArea.add(detail);
        detail.setEnabled(false);

        widget.addStyleName(resources.style().table());
        message.addStyleName(resources.style().message());
        showHideDetail.addStyleName(resources.style().showHide());
        detail.addStyleName(resources.style().detail());

        detail.addInitializeHandler(new InitializeHandler() {
            @Override
            public void onInitialize(final InitializeEvent event) {
                final Element e = detail.getElement();
                final IFrameElement ife = IFrameElement.as(e);
                final Document doc = ife.getContentDocument();
                doc.getBody().getStyle().setPadding(3, Unit.PX);
                doc.getBody().getStyle().setMargin(0, Unit.PX);
            }
        });

        showHideDetail.setVisible(false);
        setDetailVisible(false);

        showHideDetail.addHandler(new ClickHandler() {
            @Override
            public void onClick(final ClickEvent event) {
                if ((event.getNativeButton() & NativeEvent.BUTTON_LEFT) != 0) {
                    showDetail(!detailVisible);
                }
            }
        }, ClickEvent.getType());
    }

    private void setDetailVisible(final boolean visible) {
        detail.setVisible(visible);
    }

    @Override
    public Widget asWidget() {
        return widget;
    }

    @Override
    public void setQuestion(final SafeHtml text) {
        image.setResource(resources.question());
        setHTML(text);
    }

    @Override
    public void setInfo(final SafeHtml text) {
        image.setResource(resources.info());
        setHTML(text);
    }

    @Override
    public void setError(final SafeHtml text) {
        image.setResource(resources.error());
        setHTML(text);
    }

    @Override
    public void setWarn(final SafeHtml text) {
        image.setResource(resources.warn());
        setHTML(text);
    }

    private void setHTML(final SafeHtml html) {
        if (html.asString().length() > MAX_MESSAGE_LENGTH) {
            message.setText("");
            setDetail(html);
        } else {
            message.setHTML(html);
        }
    }

    @Override
    public void setDetail(final SafeHtml html) {
        if (html != null && html.asString().length() > 0) {
            final SafeHtmlBuilder builder = new SafeHtmlBuilder();
            builder.appendHtmlConstant(
                    "<div style=\"font-family: Courier New; font-size: 10px; white-space: pre;\">");
            builder.append(html);
            builder.appendHtmlConstant("</div>");
            detail.setHTML(builder.toSafeHtml());
            showDetail(false);
        } else {
            showHideDetail.setVisible(false);
            setDetailVisible(false);
        }
    }

    private void showDetail(final boolean show) {
        this.detailVisible = show;
        showHideDetail.setVisible(true);
        if (show) {
            showHideDetail.setText("Hide Detail");
            setDetailVisible(true);
        } else {
            showHideDetail.setText("Show Detail");
            setDetailVisible(false);
        }
    }
}