org.eclipse.cdt.internal.ui.language.LanguageMappingWidget.java Source code

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Here is the source code for org.eclipse.cdt.internal.ui.language.LanguageMappingWidget.java

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/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation and others.
 * 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:
 * IBM Corporation - Initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.internal.ui.language;

import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.core.runtime.content.IContentTypeManager;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Link;
import org.eclipse.swt.widgets.Table;

import org.eclipse.cdt.core.model.LanguageManager;

public abstract class LanguageMappingWidget {

    protected static final int MINIMUM_COLUMN_WIDTH = 150;
    protected Composite fContents;
    protected boolean fIsReadOnly;

    protected Table fTable;
    protected HashMap<String, String> fContentTypeNamesToIDsMap;
    protected Set<IContentType> fAffectedContentTypes;
    protected Font fOverriddenFont;
    protected LanguageMappingWidget fChild;
    protected IAdaptable fElement;

    protected Set<String> fOverriddenContentTypes;

    private boolean fIsChanged;

    public LanguageMappingWidget() {
        fOverriddenFont = JFaceResources.getFontRegistry().getItalic(JFaceResources.DIALOG_FONT);
        fOverriddenContentTypes = Collections.emptySet();

        // keep a mapping of all registered content types and their names
        fContentTypeNamesToIDsMap = new HashMap<String, String>();
        String[] contentTypesIDs = LanguageManager.getInstance().getRegisteredContentTypeIds();

        IContentTypeManager contentTypeManager = Platform.getContentTypeManager();

        for (int i = 0; i < contentTypesIDs.length; i++) {

            String name = contentTypeManager.getContentType(contentTypesIDs[i]).getName();

            // keep track of what ID this name corresponds to so that when we
            // setup the mapping
            // later based upon user selection, we'll know what ID to use
            fContentTypeNamesToIDsMap.put(name, contentTypesIDs[i]);
        }

        fAffectedContentTypes = new HashSet<IContentType>();
    }

    public IAdaptable getElement() {
        return fElement;
    }

    public void setElement(IAdaptable element) {
        fElement = element;
    }

    public void setOverriddenContentTypes(Set<String> contentTypes) {
        fOverriddenContentTypes = contentTypes;
    }

    public IContentType[] getAffectedContentTypes() {
        return fAffectedContentTypes.toArray(new IContentType[fAffectedContentTypes.size()]);
    }

    public void setReadOnly(boolean isReadOnly) {
        fIsReadOnly = isReadOnly;
    }

    public void setChild(LanguageMappingWidget child) {
        fChild = child;
    }

    public boolean isChanged() {
        return fIsChanged;
    }

    public void setChanged(boolean changed) {
        fIsChanged = changed;
    }

    protected void createHeader(Composite parent, String description) {
        Link link = new Link(fContents, SWT.NONE);
        link.setText(description);

        link.addListener(SWT.Selection, new LanguageMappingLinkListener(fContents.getShell(), getElement()) {
            @Override
            protected void refresh() {
                refreshMappings();
            }
        });

        GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, false);
        gridData.widthHint = MINIMUM_COLUMN_WIDTH * 2;
        gridData.horizontalSpan = 2;
        link.setLayoutData(gridData);
    }

    public abstract Composite createContents(Composite parent, String description);

    public abstract void refreshMappings();
}