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/*******************************************************************************
* Copyright (c) 2004, 2016 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.resource;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
/**
* Describes a Font using an array of FontData
*
* @since 3.1
*/
final class ArrayFontDescriptor extends FontDescriptor {
private FontData[] data;
private Font originalFont = null;
/**
* Creates a font descriptor for a font with the given name, height,
* and style. These arguments are passed directly to the constructor
* of Font.
*
* @param data FontData describing the font to create
*
* @see org.eclipse.swt.graphics.Font#Font(org.eclipse.swt.graphics.Device, org.eclipse.swt.graphics.FontData)
* @since 3.1
*/
public ArrayFontDescriptor(FontData[] data) {
this.data = data;
}
/**
* Creates a font descriptor that describes the given font.
*
* @param originalFont font to be described
*
* @see FontDescriptor#createFrom(org.eclipse.swt.graphics.Font)
* @since 3.1
*/
public ArrayFontDescriptor(Font originalFont) {
this(originalFont.getFontData());
this.originalFont = originalFont;
}
@Override
public FontData[] getFontData() {
// Copy the original array to ensure that callers will not modify it
return copy(data);
}
@Override
public Font createFont(Device device) {
// If this descriptor is an existing font, then we can return the original font
// if this is the same device.
if (originalFont != null) {
// If we're allocating on the same device as the original font, return the original.
if (originalFont.getDevice() == device) {
return originalFont;
}
}
return new Font(device, data);
}
@Override
public boolean equals(Object obj) {
if (obj instanceof ArrayFontDescriptor) {
ArrayFontDescriptor descr = (ArrayFontDescriptor)obj;
if (descr.originalFont != originalFont) {
return false;
}
if (originalFont != null) {
return true;
}
if (data.length != descr.data.length) {
return false;
}
for (int i = 0; i < data.length; i++) {
FontData fd = data[i];
FontData fd2 = descr.data[i];
if (!fd.equals(fd2)) {
return false;
}
}
return true;
}
return false;
}
@Override
public int hashCode() {
if (originalFont != null) {
return originalFont.hashCode();
}
int code = 0;
for (FontData fd : data) {
code += fd.hashCode();
}
return code;
}
@Override
public void destroyFont(Font previouslyCreatedFont) {
if (previouslyCreatedFont == originalFont) {
return;
}
previouslyCreatedFont.dispose();
}
}
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