/*
* Copyright (c) 2010, Michael Grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.jowidgets.spi.impl.swt.common.util;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.jowidgets.common.types.Markup;
import org.jowidgets.spi.impl.swt.common.font.FontCache;
import org.jowidgets.spi.impl.swt.common.font.FontDataKey;
import org.jowidgets.spi.impl.swt.common.font.IFontCache;
import org.jowidgets.util.Assert;
public final class FontProvider {
private static final IFontCache FONT_CACHE = new FontCache();
private FontProvider() {};
public static Font deriveFont(final Font baseFont, final Markup markup) {
Assert.paramNotNull(baseFont, "baseFont");
Assert.paramNotNull(markup, "markup");
return deriveFont(baseFont, null, null, markup);
}
public static Font deriveFont(final Font baseFont, final String fontName) {
Assert.paramNotNull(baseFont, "baseFont");
Assert.paramNotNull(fontName, "fontName");
return deriveFont(baseFont, fontName, null, null);
}
public static Font deriveFont(final Font baseFont, final int height) {
Assert.paramNotNull(baseFont, "baseFont");
return deriveFont(baseFont, null, Integer.valueOf(height), null);
}
public static Font deriveFont(final Font baseFont, final String newFontName, final Integer newHeight, final Markup newMarkup) {
Assert.paramNotNull(baseFont, "baseFont");
Integer newStyle = null;
if (Markup.DEFAULT.equals(newMarkup)) {
newStyle = Integer.valueOf(SWT.NORMAL);
}
else if (Markup.STRONG.equals(newMarkup)) {
newStyle = Integer.valueOf(SWT.BOLD);
}
else if (Markup.EMPHASIZED.equals(newMarkup)) {
newStyle = Integer.valueOf(SWT.ITALIC);
}
else if (newMarkup != null) {
throw new IllegalArgumentException("The markup '" + newMarkup + "' is unknown.");
}
final FontData[] oldFontData = baseFont.getFontData();
final FontData[] newFontData = new FontData[oldFontData.length];
for (int i = 0; i < oldFontData.length; i++) {
final String fontName = newFontName != null ? newFontName : oldFontData[i].getName();
final int fontHeight = newHeight != null ? newHeight.intValue() : oldFontData[i].getHeight();
final int style = newStyle != null ? newStyle.intValue() : oldFontData[i].getStyle();
newFontData[i] = new FontData(fontName, fontHeight, style);
}
return FONT_CACHE.getFont(new FontDataKey(newFontData));
}
}