de.tudarmstadt.ukp.csniper.webapp.evaluation.page.ContextView.java Source code

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/*******************************************************************************
 * Copyright 2013
 * Ubiquitous Knowledge Processing (UKP) Lab
 * Technische Universitt Darmstadt
 * 
 * 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 de.tudarmstadt.ukp.csniper.webapp.evaluation.page;

import java.io.IOException;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.MarkupStream;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.util.string.Strings;

import de.tudarmstadt.ukp.csniper.webapp.evaluation.model.EvaluationItem;
import de.tudarmstadt.ukp.csniper.webapp.evaluation.model.ItemContext;
import de.tudarmstadt.ukp.csniper.webapp.search.ContextProvider;

public class ContextView extends Panel {
    private static final long serialVersionUID = -4541901391361133303L;
    private ContextProvider contextProvider;
    private EvaluationItem evaluationItem;
    private ItemContext context;
    private int extensionSize = 300;
    private int leftSize = extensionSize;
    private int rightSize = extensionSize;

    public ContextView(ContextProvider aContextProvider, EvaluationItem aEvaluationItem) throws IOException {
        super("contextView");

        contextProvider = aContextProvider;
        evaluationItem = aEvaluationItem;
        context = getContext(false, false);

        final Label left = new HtmlLabel("left", new PropertyModel<ItemContext>(context, "left"));
        left.setOutputMarkupId(true);
        add(left);

        add(new HtmlLabel("unitLeft", new PropertyModel<ItemContext>(context, "unitLeft")));

        add(new HtmlLabel("unitMatch", new PropertyModel<ItemContext>(context, "match")));

        add(new HtmlLabel("unitRight", new PropertyModel<ItemContext>(context, "unitRight")));

        final Label right = new HtmlLabel("right", new PropertyModel<ItemContext>(context, "right"));
        right.setOutputMarkupId(true);
        add(right);

        add(new AjaxLink<ItemContext>("moreLeft", new PropertyModel<ItemContext>(context, "moreLeft")) {
            private static final long serialVersionUID = 3185794699985733066L;

            {
                setVisible(context.getMoreLeft() > 0);
                setOutputMarkupId(true);
            }

            @Override
            public void onComponentTagBody(final MarkupStream markupStream, final ComponentTag openTag) {
                replaceComponentTagBody(markupStream, openTag,
                        "(" + getDefaultModelObjectAsString() + " chars) <<< ...");
            }

            @Override
            public void onClick(AjaxRequestTarget aTarget) {
                // get more context
                try {
                    context = getContext(true, false);
                    left.setDefaultModel(new PropertyModel<ItemContext>(context, "left"));
                    setModel(new PropertyModel<ItemContext>(context, "moreLeft"));
                } catch (IOException e) {
                    // TODO tell the user something went wrong - update feedbackpanel
                    error("Unable to load context: " + e.getMessage());
                }
                // update link
                setVisible(context.getMoreLeft() > 0);
                aTarget.add(left, this);
            }
        });

        add(new AjaxLink<ItemContext>("moreRight", new PropertyModel<ItemContext>(context, "moreRight")) {
            private static final long serialVersionUID = 3185794699985733066L;

            {
                setVisible(context.getMoreRight() > 0);
                setOutputMarkupId(true);
            }

            @Override
            public void onComponentTagBody(final MarkupStream markupStream, final ComponentTag openTag) {
                replaceComponentTagBody(markupStream, openTag,
                        "... >>> (" + getDefaultModelObjectAsString() + " chars)");
            }

            @Override
            public void onClick(AjaxRequestTarget aTarget) {
                // get more context
                try {
                    context = getContext(false, true);
                    right.setDefaultModel(new PropertyModel<ItemContext>(context, "right"));
                    setModel(new PropertyModel<ItemContext>(context, "moreRight"));
                } catch (IOException e) {
                    // TODO tell the user something went wrong - update feedbackpanel
                    error("Unable to load context: " + e.getMessage());
                }
                // update link
                setVisible(context.getMoreRight() > 0);
                aTarget.add(right, this);
            }
        });
    }

    private ItemContext getContext(boolean doExtendLeft, boolean doExtendRight) throws IOException {
        if (doExtendLeft) {
            leftSize += extensionSize;
        }
        if (doExtendRight) {
            rightSize += extensionSize;
        }
        return contextProvider.getContext(evaluationItem, leftSize, rightSize);
    }

    private class HtmlLabel extends Label {
        private static final long serialVersionUID = -8580880708875030344L;

        public HtmlLabel(String aId, IModel<?> aModel) {
            super(aId, aModel);
            setEscapeModelStrings(false);
        }

        @Override
        public void onComponentTagBody(final MarkupStream markupStream, final ComponentTag openTag) {
            replaceComponentTagBody(markupStream, openTag,
                    Strings.escapeMarkup(getDefaultModelObjectAsString(), false, false).toString().replaceAll("\n",
                            "<br/>"));
        }
    }
}