de.loskutov.anyedit.actions.ConvertUnicode.java Source code

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Here is the source code for de.loskutov.anyedit.actions.ConvertUnicode.java

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/*******************************************************************************
 * Copyright (c) 2009 Andrey Loskutov.
 * 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
 * Contributor:  Stefan Seidel - initial API and implementation
 * Contributor:  Andrey Loskutov - integration
 *******************************************************************************/
package de.loskutov.anyedit.actions;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialogWithToggle;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.osgi.util.NLS;

import de.loskutov.anyedit.AnyEditToolsPlugin;
import de.loskutov.anyedit.IAnyEditConstants;
import de.loskutov.anyedit.Messages;
import de.loskutov.anyedit.util.TextReplaceResultSet;

public class ConvertUnicode extends AbstractReplaceAction {

    private static final int KEY_UNESCAPE = 0;

    private static final int KEY_ESCAPE = 1;

    private boolean warnAboutUnsupportedUnicode;
    private String charset;

    @Override
    protected void doTextOperation(IDocument doc, String actionID, TextReplaceResultSet resultSet)
            throws BadLocationException {
        warnAboutUnsupportedUnicode = warnAboutUnsupportedUnicode();
        charset = getEditor().computeEncoding();
        super.doTextOperation(doc, actionID, resultSet);
    }

    /**
     * @return
     */
    private boolean warnAboutUnsupportedUnicode() {
        return AnyEditToolsPlugin.getDefault().getPreferenceStore()
                .getBoolean(IAnyEditConstants.WARN_ABOUT_UNSUPPORTED_UNICODE);
    }

    @Override
    protected String performReplace(String line, int actionKey) {
        if (KEY_ESCAPE == actionKey) {
            return textUtil.toUnicode(line);
        }
        String charsetToUse = warnAboutUnsupportedUnicode ? charset : null;
        try {
            return textUtil.fromUnicode(charsetToUse, line);
        } catch (UnsupportedOperationException e) {
            MessageDialogWithToggle dialogWithToggle = MessageDialogWithToggle.openYesNoQuestion(
                    AnyEditToolsPlugin.getShell(), Messages.ConvertUnicode_title,
                    NLS.bind(Messages.ConvertUnicode_warn, e.getMessage()), Messages.ConvertUnicode_toggleMessage,
                    false, AnyEditToolsPlugin.getDefault().getPreferenceStore(),
                    IAnyEditConstants.WARN_ABOUT_UNSUPPORTED_UNICODE);

            int returnCode = dialogWithToggle.getReturnCode();
            // refresh the value, if user changed it
            warnAboutUnsupportedUnicode = warnAboutUnsupportedUnicode();
            if (returnCode != IDialogConstants.YES_ID) {
                shouldStopReplace = true;
                return null;
            }
            // suppress any warning, just continue
            return textUtil.fromUnicode(null, line);
        }
    }

    @Override
    protected int getActionKey(String actionID) {
        return actionID.startsWith(ACTION_ID_UNICODIFY) ? KEY_ESCAPE : KEY_UNESCAPE;
    }
}