org.eclipse.cdt.internal.ui.preferences.CParserPreferencePage.java Source code

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Here is the source code for org.eclipse.cdt.internal.ui.preferences.CParserPreferencePage.java

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/*******************************************************************************
 * Copyright (c) 2005, 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
 *     Markus Schorn (Wind River Systems)
 *******************************************************************************/
package org.eclipse.cdt.internal.ui.preferences;

import java.util.ArrayList;

import org.eclipse.core.runtime.Preferences;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.dom.CDOM;
import org.eclipse.cdt.core.parser.CodeReaderCache;
import org.eclipse.cdt.core.parser.ICodeReaderCache;
import org.eclipse.cdt.ui.CUIPlugin;

import org.eclipse.cdt.internal.ui.preferences.OverlayPreferenceStore.OverlayKey;

/**
 * @author dsteffle
 * @deprecated the one preference found on the page was moved to the 
 * indexer preference page.
 */
@Deprecated
public class CParserPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

    protected OverlayPreferenceStore fOverlayStore;
    private Text bufferTextControl;

    public CParserPreferencePage() {
        setPreferenceStore(CUIPlugin.getDefault().getPreferenceStore());
        fOverlayStore = createOverlayStore();
    }

    private OverlayPreferenceStore createOverlayStore() {
        ArrayList<OverlayKey> overlayKeys = new ArrayList<OverlayKey>();
        overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING,
                CodeReaderCache.CODE_READER_BUFFER));

        OverlayPreferenceStore.OverlayKey[] keys = new OverlayPreferenceStore.OverlayKey[overlayKeys.size()];
        overlayKeys.toArray(keys);
        return new OverlayPreferenceStore(getPreferenceStore(), keys);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
     */
    @Override
    protected Control createContents(Composite parent) {
        fOverlayStore.load();
        fOverlayStore.start();

        initializeDialogUnits(parent);

        Composite result = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
        layout.marginWidth = 0;
        layout.verticalSpacing = convertVerticalDLUsToPixels(10);
        layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
        result.setLayout(layout);

        Group bufferGroup = new Group(result, SWT.NONE);
        bufferGroup.setLayout(new GridLayout());
        bufferGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        bufferGroup.setText(PreferencesMessages.CBufferPreferences_CodeReaderBuffer_CodeReaderBufferGroup);

        bufferTextControl = (Text) addTextField(bufferGroup,
                PreferencesMessages.CBufferPreferences_CodeReaderBuffer_Size, 6, 0);

        initialize();

        return result;

    }

    private void initialize() {
        bufferTextControl.setText(fOverlayStore.getString(CodeReaderCache.CODE_READER_BUFFER));
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
     */
    @Override
    public void init(IWorkbench workbench) {
        // TODO Auto-generated method stub
    }

    private Control addTextField(Composite composite, String label, int textLimit, int indentation) {

        Label labelControl = new Label(composite, SWT.NONE);
        labelControl.setText(label);
        GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
        gd.horizontalIndent = indentation;
        labelControl.setLayoutData(gd);

        Text textControl = new Text(composite, SWT.BORDER | SWT.SINGLE);
        gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
        gd.widthHint = convertWidthInCharsToPixels(textLimit + 1);
        textControl.setLayoutData(gd);
        textControl.setTextLimit(textLimit);

        return textControl;
    }

    /*
     * @see IPreferencePage#performOk()
     */
    @Override
    public boolean performOk() {
        Preferences prefs = CCorePlugin.getDefault().getPluginPreferences();

        String bufferSize = bufferTextControl.getText();
        fOverlayStore.setValue(CodeReaderCache.CODE_READER_BUFFER, bufferSize);
        prefs.setValue(CodeReaderCache.CODE_READER_BUFFER, bufferSize);

        ICodeReaderCache cache = CDOM.getInstance().getCodeReaderFactory(CDOM.PARSE_SAVED_RESOURCES)
                .getCodeReaderCache();
        if (cache instanceof CodeReaderCache) {
            try {
                // Check the string number
                int size = Integer.parseInt(bufferSize);
                if (size >= 0) {
                    ((CodeReaderCache) cache).setCacheSize(size);
                } else {
                    ((CodeReaderCache) cache).setCacheSize(CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB);
                    prefs.setValue(CodeReaderCache.CODE_READER_BUFFER, CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB);
                    fOverlayStore.setValue(CodeReaderCache.CODE_READER_BUFFER,
                            CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB);
                }
            } catch (NumberFormatException ex) {
                ((CodeReaderCache) cache).setCacheSize(CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB);
                prefs.setValue(CodeReaderCache.CODE_READER_BUFFER, CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB);
                fOverlayStore.setValue(CodeReaderCache.CODE_READER_BUFFER,
                        CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB);
            }
        }

        fOverlayStore.propagate();
        CCorePlugin.getDefault().savePluginPreferences();

        return true;
    }

    /**
     * @param store
     */
    public static void initDefaults(IPreferenceStore store) {
        store.setDefault(CodeReaderCache.CODE_READER_BUFFER, CodeReaderCache.DEFAULT_CACHE_SIZE_IN_MB_STRING);
    }

    /*
     * @see PreferencePage#performDefaults()
     */
    @Override
    protected void performDefaults() {
        fOverlayStore.loadDefaults();
        initialize();
        super.performDefaults();
    }
}