net.sf.mmm.client.ui.gwt.widgets.richtext.FeatureBehaviorSubscript.java Source code

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Here is the source code for net.sf.mmm.client.ui.gwt.widgets.richtext.FeatureBehaviorSubscript.java

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/* Copyright (c) The m-m-m Team, Licensed under the Apache License, Version 2.0
 * http://www.apache.org/licenses/LICENSE-2.0 */
package net.sf.mmm.client.ui.gwt.widgets.richtext;

import net.sf.mmm.client.ui.api.common.RichTextFeature;

import com.google.gwt.dom.client.Style;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.dom.client.Style.VerticalAlign;

/**
 * This is the implementation of {@link FeatureBehavior} for {@link RichTextFeature#SUBSCRIPT}.
 * 
 * @author Joerg Hohwiller (hohwille at users.sourceforge.net)
 * @since 1.0.0
 */
class FeatureBehaviorSubscript extends AbstractToggleFeatureBehavior {

    /**
     * The constructor.
     * 
     * @param richTextToolbar is the {@link RichTextToolbar} owning this {@link FeatureBehavior}.
     */
    FeatureBehaviorSubscript(RichTextToolbar richTextToolbar) {

        super(richTextToolbar);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public RichTextFeature getFeature() {

        return RichTextFeature.SUBSCRIPT;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Boolean getValue() {

        return Boolean.valueOf(getFormatter().isSubscript());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void toggle() {

        getFormatter().toggleSubscript();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void updateFontSettings(boolean checked, Style style) {

        VerticalAlign align;
        if (checked) {
            align = VerticalAlign.SUB;
        } else {
            align = VerticalAlign.BASELINE;
        }
        // small, sub, sup { font-size: .83em }
        // sub { vertical-align: sub }
        // sup { vertical-align: super }
        style.setVerticalAlign(align);
        style.setFontSize(0.83, Unit.EM);
    }
}