com.subgraph.vega.ui.httpviewer.entity.HttpEntityTextViewer.java Source code

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Here is the source code for com.subgraph.vega.ui.httpviewer.entity.HttpEntityTextViewer.java

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/*******************************************************************************
 * Copyright (c) 2011 Subgraph.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Subgraph - initial API and implementation
 ******************************************************************************/
package com.subgraph.vega.ui.httpviewer.entity;

import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.entity.StringEntity;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentListener;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;

import com.subgraph.vega.ui.httpviewer.Colors;

public class HttpEntityTextViewer extends Composite {
    private final TextEntityDocumentFactory documentFactory;
    private final JavascriptViewerConfiguration javascriptConfiguration;
    private final HtmlTextViewerConfiguration htmlConfiguration;
    private final SourceViewer viewer;
    private final Colors colors;

    private IDocument currentDocument;
    private String currentContentType;
    private String currentContentEncoding;
    private boolean isDirty;

    HttpEntityTextViewer(Composite parent) {
        super(parent, SWT.NONE);
        setLayout(new FillLayout());
        this.viewer = createSourceViewer();
        this.colors = new Colors(getDisplay());
        this.documentFactory = new TextEntityDocumentFactory();
        this.javascriptConfiguration = new JavascriptViewerConfiguration(colors);
        this.htmlConfiguration = new HtmlTextViewerConfiguration(colors);
    }

    private SourceViewer createSourceViewer() {
        return new SourceViewer(this, null, SWT.V_SCROLL | SWT.H_SCROLL);
    }

    public void setInput(String text, String contentType, String contentEncoding) {
        viewer.unconfigure();
        currentContentType = contentType;
        currentContentEncoding = contentEncoding;
        currentDocument = documentFactory.createDocument(text, contentType);
        viewer.setDocument(currentDocument);
        configureForContentType(contentType);
        viewer.refresh();
        isDirty = false;
        currentDocument.addDocumentListener(new IDocumentListener() {
            @Override
            public void documentAboutToBeChanged(DocumentEvent event) {
            }

            @Override
            public void documentChanged(DocumentEvent event) {
                isDirty = true;
            }
        });
    }

    public void clear() {
        currentDocument = null;
        currentContentType = null;
        currentContentEncoding = null;
        viewer.setInput(null);
    }

    public boolean isContentDirty() {
        return isDirty;
    }

    public HttpEntity getEntityContent() {
        if (currentDocument == null) {
            return null;
        } else {
            return createEntityForDocument(currentDocument);
        }
    }

    private HttpEntity createEntityForDocument(IDocument document) {
        try {
            final StringEntity entity = new StringEntity(document.get());
            if (currentContentType != null && !currentContentType.isEmpty()) {
                entity.setContentType(currentContentType);
            }
            if (currentContentEncoding != null && !currentContentEncoding.isEmpty()) {
                entity.setContentEncoding(currentContentEncoding);
            }
            return entity;
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("Failed to create entity from document", e);
        }
    }

    private void configureForContentType(String contentType) {
        final String lower = contentType.toLowerCase();
        if (isJavascript(lower)) {
            viewer.configure(javascriptConfiguration);
        } else if (isHtml(lower)) {
            viewer.configure(htmlConfiguration);
        }
    }

    private boolean isJavascript(String contentType) {
        return contentType.contains("javascript") || contentType.contains("json");
    }

    private boolean isHtml(String contentType) {
        return contentType.contains("html");
    }

    @Override
    public void dispose() {
        colors.dispose();
        super.dispose();
    }
}