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A themeable Look and Feel for java swing
/*
* MIT License
*
* Copyright (c) 2020 Jannis Weis
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
package com.github.weisj.darklaf.ui;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringBufferInputStream;
import java.io.StringReader;
import java.util.logging.Logger;
import javax.swing.plaf.UIResource;
/**
* A transferable implementation for the default data transfer of some Swing components.
*
* @author Timothy Prinzing
* @version 1.10 11/17/05
*/
public class BasicTransferable implements Transferable, UIResource {
private static DataFlavor[] htmlFlavors;
private static DataFlavor[] stringFlavors;
private static DataFlavor[] plainFlavors;
static {
try {
htmlFlavors = new DataFlavor[3];
htmlFlavors[0] = new DataFlavor("text/html;class=java.lang.String");
htmlFlavors[1] = new DataFlavor("text/html;class=java.io.Reader");
htmlFlavors[2] = new DataFlavor("text/html;charset=unicode;class=java.io.InputStream");
plainFlavors = new DataFlavor[3];
plainFlavors[0] = new DataFlavor("text/plain;class=java.lang.String");
plainFlavors[1] = new DataFlavor("text/plain;class=java.io.Reader");
plainFlavors[2] = new DataFlavor("text/plain;charset=unicode;class=java.io.InputStream");
stringFlavors = new DataFlavor[2];
stringFlavors[0] = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + ";class=java.lang.String");
stringFlavors[1] = DataFlavor.stringFlavor;
} catch (ClassNotFoundException cle) {
Logger.getGlobal().severe("error initializing javax.swing.plaf.basic.BasicTranserable");
}
}
protected String plainData;
protected String htmlData;
public BasicTransferable(final String plainData, final String htmlData) {
this.plainData = plainData;
this.htmlData = htmlData;
}
/**
* Returns an array of DataFlavor objects indicating the flavors the data can be provided in. The array should be
* ordered according to preference for providing the data (from most richly descriptive to least descriptive).
*
* @return an array of data flavors in which this data can be transferred.
*/
public DataFlavor[] getTransferDataFlavors() {
DataFlavor[] richerFlavors = getRicherFlavors();
int nRicher = (richerFlavors != null) ? richerFlavors.length : 0;
int nHTML = (isHTMLSupported()) ? htmlFlavors.length : 0;
int nPlain = (isPlainSupported()) ? plainFlavors.length : 0;
int nString = (isPlainSupported()) ? stringFlavors.length : 0;
int nFlavors = nRicher + nHTML + nPlain + nString;
DataFlavor[] flavors = new DataFlavor[nFlavors];
// fill in the array
int nDone = 0;
if (nRicher > 0) {
System.arraycopy(richerFlavors, 0, flavors, nDone, nRicher);
nDone += nRicher;
}
if (nHTML > 0) {
System.arraycopy(htmlFlavors, 0, flavors, nDone, nHTML);
nDone += nHTML;
}
if (nPlain > 0) {
System.arraycopy(plainFlavors, 0, flavors, nDone, nPlain);
nDone += nPlain;
}
if (nString > 0) {
System.arraycopy(stringFlavors, 0, flavors, nDone, nString);
nDone += nString;
}
return flavors;
}
/**
* Returns whether the specified data flavor is supported for this object.
*
* @param flavor the requested flavor for the data
* @return boolean indicating whether the data flavor is supported.
*/
public boolean isDataFlavorSupported(final DataFlavor flavor) {
DataFlavor[] flavors = getTransferDataFlavors();
for (DataFlavor dataFlavor : flavors) {
if (dataFlavor.equals(flavor)) {
return true;
}
}
return false;
}
/**
* Returns an object which represents the data to be transferred. The class of the object returned is defined by
* the representation class of the flavor.
*
* @param flavor the requested flavor for the data
* @throws UnsupportedFlavorException if the requested data flavor is not supported.
* @see DataFlavor#getRepresentationClass
*/
public Object getTransferData(final DataFlavor flavor) throws UnsupportedFlavorException {
if (isRicherFlavor(flavor)) {
return getRicherData(flavor);
} else if (isHTMLFlavor(flavor)) {
String data = getHTMLData();
data = (data == null) ? "" : data;
if (String.class.equals(flavor.getRepresentationClass())) {
return data;
} else if (Reader.class.equals(flavor.getRepresentationClass())) {
return new StringReader(data);
} else if (InputStream.class.equals(flavor.getRepresentationClass())) {
return new StringBufferInputStream(data);
}
// fall through to unsupported
} else if (isPlainFlavor(flavor)) {
String data = getPlainData();
data = (data == null) ? "" : data;
if (String.class.equals(flavor.getRepresentationClass())) {
return data;
} else if (Reader.class.equals(flavor.getRepresentationClass())) {
return new StringReader(data);
} else if (InputStream.class.equals(flavor.getRepresentationClass())) {
return new StringBufferInputStream(data);
}
// fall through to unsupported
} else if (isStringFlavor(flavor)) {
String data = getPlainData();
data = (data == null) ? "" : data;
return data;
}
throw new UnsupportedFlavorException(flavor);
}
// --- richer subclass flavors ----------------------------------------------
protected boolean isRicherFlavor(final DataFlavor flavor) {
DataFlavor[] richerFlavors = getRicherFlavors();
int nFlavors = (richerFlavors != null) ? richerFlavors.length : 0;
for (int i = 0; i < nFlavors; i++) {
if (richerFlavors[i].equals(flavor)) {
return true;
}
}
return false;
}
/**
* Some subclasses will have flavors that are more descriptive than HTML or plain text. If this method returns a
* non-null value, it will be placed at the start of the array of supported flavors.
*
* @return the supported data flavours as array.
*/
protected DataFlavor[] getRicherFlavors() {
return null;
}
protected Object getRicherData(final DataFlavor flavor) {
return null;
}
// --- html flavors ----------------------------------------------------------
/**
* Returns whether or not the specified data flavor is an HTML flavor that is supported.
*
* @param flavor the requested flavor for the data
* @return boolean indicating whether or not the data flavor is supported
*/
protected boolean isHTMLFlavor(final DataFlavor flavor) {
DataFlavor[] flavors = htmlFlavors;
for (DataFlavor dataFlavor : flavors) {
if (dataFlavor.equals(flavor)) {
return true;
}
}
return false;
}
/**
* Should the HTML flavors be offered? If so, the method getHTMLData should be implemented to provide something
* reasonable.
*
* @return true if html is supported.
*/
protected boolean isHTMLSupported() {
return htmlData != null;
}
/**
* Fetch the data in a text/html format
*
* @return the html data.
*/
protected String getHTMLData() {
return htmlData;
}
// --- plain text flavors ----------------------------------------------------
/**
* Returns whether or not the specified data flavor is an plain flavor that is supported.
*
* @param flavor the requested flavor for the data
* @return boolean indicating whether or not the data flavor is supported
*/
protected boolean isPlainFlavor(final DataFlavor flavor) {
DataFlavor[] flavors = plainFlavors;
for (DataFlavor dataFlavor : flavors) {
if (dataFlavor.equals(flavor)) {
return true;
}
}
return false;
}
/**
* Should the plain text flavors be offered? If so, the method getPlainData should be implemented to provide
* something reasonable.
*
* @return true if plain text is supported.
*/
protected boolean isPlainSupported() {
return plainData != null;
}
/**
* Fetch the data in a text/plain format.
*
* @return the plain data.
*/
protected String getPlainData() {
return plainData;
}
// --- string flavorss --------------------------------------------------------
/**
* Returns whether or not the specified data flavor is a String flavor that is supported.
*
* @param flavor the requested flavor for the data
* @return boolean indicating whether or not the data flavor is supported
*/
protected boolean isStringFlavor(final DataFlavor flavor) {
DataFlavor[] flavors = stringFlavors;
for (DataFlavor dataFlavor : flavors) {
if (dataFlavor.equals(flavor)) {
return true;
}
}
return false;
}
}
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