606 lines
21 KiB
Java
606 lines
21 KiB
Java
/*
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Copyright (C) 2009 Jeroen Frijters
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jeroen Frijters
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jeroen@frijters.net
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*/
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package sun.awt;
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import java.awt.Image;
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import java.awt.datatransfer.DataFlavor;
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import java.awt.datatransfer.FlavorTable;
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import java.awt.datatransfer.Transferable;
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import java.awt.datatransfer.UnsupportedFlavorException;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.UnsupportedEncodingException;
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import java.net.URL;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.SortedMap;
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import sun.awt.datatransfer.DataTransferer;
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import cli.System.Runtime.InteropServices.DllImportAttribute;
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public abstract class IkvmDataTransferer extends DataTransferer {
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public static final int CF_TEXT = 1;
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public static final int CF_METAFILEPICT = 3;
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public static final int CF_DIB = 8;
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public static final int CF_ENHMETAFILE = 14;
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public static final int CF_HDROP = 15;
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public static final int CF_LOCALE = 16;
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public static final long CF_HTML = RegisterClipboardFormat("HTML Format");
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public static final long CFSTR_INETURL = RegisterClipboardFormat("UniformResourceLocator");
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public static final long CF_PNG = RegisterClipboardFormat("PNG");
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public static final long CF_JFIF = RegisterClipboardFormat("JFIF");
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private static final String[] predefinedClipboardNames = {
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"",
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"TEXT",
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"BITMAP",
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"METAFILEPICT",
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"SYLK",
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"DIF",
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"TIFF",
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"OEM TEXT",
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"DIB",
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"PALETTE",
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"PENDATA",
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"RIFF",
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"WAVE",
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"UNICODE TEXT",
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"ENHMETAFILE",
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"HDROP",
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"LOCALE",
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"DIBV5"
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};
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private static final Map<String, Long> predefinedClipboardNameMap;
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static {
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Map<String, Long> tempMap = new HashMap<String, Long>(predefinedClipboardNames.length, 1.0f);
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for (int i = 1; i < predefinedClipboardNames.length; i++) {
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tempMap.put(predefinedClipboardNames[i], Long.valueOf(i));
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}
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predefinedClipboardNameMap = Collections.synchronizedMap(tempMap);
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}
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private static final Long L_CF_LOCALE = (Long) predefinedClipboardNameMap.get(predefinedClipboardNames[CF_LOCALE]);
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@DllImportAttribute.Annotation(value = "user32.dll", EntryPoint = "RegisterClipboardFormat")
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private native static int _RegisterClipboardFormat(String format);
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@cli.System.Security.SecuritySafeCriticalAttribute.Annotation
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private static int RegisterClipboardFormat(String format)
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{
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return _RegisterClipboardFormat(format);
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}
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public SortedMap getFormatsForFlavors(DataFlavor[] flavors, FlavorTable map) {
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SortedMap retval = super.getFormatsForFlavors(flavors, map);
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// The Win32 native code does not support exporting LOCALE data, nor
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// should it.
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retval.remove(L_CF_LOCALE);
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return retval;
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}
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public String getDefaultUnicodeEncoding() {
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return "utf-16le";
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}
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public byte[] translateTransferable(Transferable contents,
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DataFlavor flavor,
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long format) throws IOException
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{
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byte[] bytes = super.translateTransferable(contents, flavor, format);
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if (format == CF_HTML) {
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bytes = HTMLCodec.convertToHTMLFormat(bytes);
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}
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return bytes;
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}
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protected Object translateBytesOrStream(InputStream str, byte[] bytes,
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DataFlavor flavor, long format,
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Transferable localeTransferable)
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throws IOException
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{
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if (format == CF_HTML && flavor.isFlavorTextType()) {
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if (str == null) {
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str = new ByteArrayInputStream(bytes);
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bytes = null;
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}
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str = new HTMLCodec(str, EHTMLReadMode.HTML_READ_SELECTION);
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}
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if (format == CFSTR_INETURL &&
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URL.class.equals(flavor.getRepresentationClass()))
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{
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if (bytes == null) {
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bytes = inputStreamToByteArray(str);
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str = null;
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}
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String charset = getDefaultTextCharset();
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if (localeTransferable != null && localeTransferable.
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isDataFlavorSupported(javaTextEncodingFlavor))
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{
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try {
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charset = new String((byte[])localeTransferable.
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getTransferData(javaTextEncodingFlavor),
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"UTF-8");
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} catch (UnsupportedFlavorException cannotHappen) {
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}
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}
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return new URL(new String(bytes, charset));
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}
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return super.translateBytesOrStream(str, bytes, flavor, format,
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localeTransferable);
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}
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protected byte[] imageToPlatformBytes(Image image, long format)
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throws IOException {
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String mimeType = null;
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if (format == CF_PNG) {
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mimeType = "image/png";
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} else if (format == CF_JFIF) {
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mimeType = "image/jpeg";
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}
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if (mimeType != null) {
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return imageToStandardBytes(image, mimeType);
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}
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throw new Error("Not implemented");
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}
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protected abstract byte[] imageToStandardBytes(Image image, String mimeType)
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throws IOException;
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protected Image platformImageBytesOrStreamToImage(InputStream str,
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byte[] bytes, long format) {
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throw new Error("Not implemented");
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}
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protected String[] dragQueryFile(byte[] bytes) {
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throw new Error("Not implemented");
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}
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protected String getNativeForFormat(long format) {
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return (format < predefinedClipboardNames.length && format>=0)
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? predefinedClipboardNames[(int)format]
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: getClipboardFormatName(format);
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}
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protected Long getFormatForNativeAsLong(String str) {
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Long format = (Long)predefinedClipboardNameMap.get(str);
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if (format == null) {
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format = Long.valueOf(RegisterClipboardFormat(str));
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}
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return format; }
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protected abstract String getClipboardFormatName(long format);
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public boolean isImageFormat(long format) {
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return format == CF_DIB || format == CF_ENHMETAFILE ||
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format == CF_METAFILEPICT || format == CF_PNG ||
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format == CF_JFIF;
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}
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public boolean isLocaleDependentTextFormat(long format) {
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return format == CF_TEXT || format == CFSTR_INETURL;
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}
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public boolean isFileFormat(long format) {
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return format == CF_HDROP;
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}
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}
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enum EHTMLReadMode {
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HTML_READ_ALL,
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HTML_READ_FRAGMENT,
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HTML_READ_SELECTION
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}
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/**
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* on decode: This stream takes an InputStream which provides data in CF_HTML format,
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* strips off the description and context to extract the original HTML data.
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*
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* on encode: static convertToHTMLFormat is responsible for HTML clipboard header creation
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*/
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class HTMLCodec extends InputStream {
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//static section
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public static final String ENCODING = "UTF-8";
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public static final String VERSION = "Version:";
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public static final String START_HTML = "StartHTML:";
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public static final String END_HTML = "EndHTML:";
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public static final String START_FRAGMENT = "StartFragment:";
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public static final String END_FRAGMENT = "EndFragment:";
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public static final String START_SELECTION = "StartSelection:"; //optional
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public static final String END_SELECTION = "EndSelection:"; //optional
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public static final String START_FRAGMENT_CMT = "<!--StartFragment-->";
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public static final String END_FRAGMENT_CMT = "<!--EndFragment-->";
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public static final String SOURCE_URL = "SourceURL:";
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public static final String DEF_SOURCE_URL = "about:blank";
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public static final String EOLN = "\r\n";
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private static final String VERSION_NUM = "1.0";
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private static final int PADDED_WIDTH = 10;
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private static String toPaddedString(int n, int width) {
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String string = "" + n;
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int len = string.length();
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if (n >= 0 && len < width) {
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char[] array = new char[width - len];
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Arrays.fill(array, '0');
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StringBuffer buffer = new StringBuffer(width);
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buffer.append(array);
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buffer.append(string);
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string = buffer.toString();
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}
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return string;
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}
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/**
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* convertToHTMLFormat adds the MS HTML clipboard header to byte array that
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* contains the parameters pairs.
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*
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* The consequence of parameters is fixed, but some or all of them could be
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* omitted. One parameter per one text line.
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* It looks like that:
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*
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* Version:1.0\r\n -- current supported version
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* StartHTML:000000192\r\n -- shift in array to the first byte after the header
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* EndHTML:000000757\r\n -- shift in array of last byte for HTML syntax analysis
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* StartFragment:000000396\r\n -- shift in array jast after <!--StartFragment-->
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* EndFragment:000000694\r\n -- shift in array before start <!--EndFragment-->
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* StartSelection:000000398\r\n -- shift in array of the first char in copied selection
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* EndSelection:000000692\r\n -- shift in array of the last char in copied selection
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* SourceURL:http://sun.com/\r\n -- base URL for related referenses
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* <HTML>...<BODY>...<!--StartFragment-->.....................<!--EndFragment-->...</BODY><HTML>
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* ^ ^ ^ ^^ ^
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* \ StartHTML | \-StartSelection | \EndFragment EndHTML/
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* \-StartFragment \EndSelection
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*
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*Combinations with tags sequence
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*<!--StartFragment--><HTML>...<BODY>...</BODY><HTML><!--EndFragment-->
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* or
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*<HTML>...<!--StartFragment-->...<BODY>...</BODY><!--EndFragment--><HTML>
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* are vailid too.
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*/
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public static byte[] convertToHTMLFormat(byte[] bytes) {
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// Calculate section offsets
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String htmlPrefix = "";
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String htmlSuffix = "";
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{
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//we have extend the fragment to full HTML document correctly
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//to avoid HTML and BODY tags doubling
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String stContext = new String(bytes);
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String stUpContext = stContext.toUpperCase();
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if( -1 == stUpContext.indexOf("<HTML") ) {
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htmlPrefix = "<HTML>";
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htmlSuffix = "</HTML>";
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if( -1 == stUpContext.indexOf("<BODY") ) {
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htmlPrefix = htmlPrefix +"<BODY>";
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htmlSuffix = "</BODY>" + htmlSuffix;
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};
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};
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htmlPrefix = htmlPrefix + START_FRAGMENT_CMT;
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htmlSuffix = END_FRAGMENT_CMT + htmlSuffix;
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}
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String stBaseUrl = DEF_SOURCE_URL;
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int nStartHTML =
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VERSION.length() + VERSION_NUM.length() + EOLN.length()
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+ START_HTML.length() + PADDED_WIDTH + EOLN.length()
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+ END_HTML.length() + PADDED_WIDTH + EOLN.length()
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+ START_FRAGMENT.length() + PADDED_WIDTH + EOLN.length()
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+ END_FRAGMENT.length() + PADDED_WIDTH + EOLN.length()
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+ SOURCE_URL.length() + stBaseUrl.length() + EOLN.length()
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;
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int nStartFragment = nStartHTML + htmlPrefix.length();
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int nEndFragment = nStartFragment + bytes.length - 1;
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int nEndHTML = nEndFragment + htmlSuffix.length();
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StringBuilder header = new StringBuilder(
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nStartFragment
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+ START_FRAGMENT_CMT.length()
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);
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//header
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header.append(VERSION);
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header.append(VERSION_NUM);
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header.append(EOLN);
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header.append(START_HTML);
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header.append(toPaddedString(nStartHTML, PADDED_WIDTH));
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header.append(EOLN);
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header.append(END_HTML);
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header.append(toPaddedString(nEndHTML, PADDED_WIDTH));
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header.append(EOLN);
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header.append(START_FRAGMENT);
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header.append(toPaddedString(nStartFragment, PADDED_WIDTH));
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header.append(EOLN);
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header.append(END_FRAGMENT);
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header.append(toPaddedString(nEndFragment, PADDED_WIDTH));
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header.append(EOLN);
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header.append(SOURCE_URL);
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header.append(stBaseUrl);
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header.append(EOLN);
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//HTML
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header.append(htmlPrefix);
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byte[] headerBytes = null, trailerBytes = null;
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try {
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headerBytes = new String(header).getBytes(ENCODING);
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trailerBytes = htmlSuffix.getBytes(ENCODING);
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} catch (UnsupportedEncodingException cannotHappen) {
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}
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byte[] retval = new byte[headerBytes.length + bytes.length +
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trailerBytes.length];
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System.arraycopy(headerBytes, 0, retval, 0, headerBytes.length);
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System.arraycopy(bytes, 0, retval, headerBytes.length,
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bytes.length - 1);
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System.arraycopy(trailerBytes, 0, retval,
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headerBytes.length + bytes.length - 1,
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trailerBytes.length);
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retval[retval.length-1] = 0;
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return retval;
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}
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////////////////////////////////////
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//decoder instance data and methods:
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private final BufferedInputStream bufferedStream;
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private boolean descriptionParsed = false;
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private boolean closed = false;
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// InputStreamReader uses an 8K buffer. The size is not customizable.
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public static final int BYTE_BUFFER_LEN = 8192;
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// CharToByteUTF8.getMaxBytesPerChar returns 3, so we should not buffer
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// more chars than 3 times the number of bytes we can buffer.
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public static final int CHAR_BUFFER_LEN = BYTE_BUFFER_LEN / 3;
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private static final String FAILURE_MSG =
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"Unable to parse HTML description: ";
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private static final String INVALID_MSG =
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" invalid";
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//HTML header mapping:
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private long iHTMLStart,// StartHTML -- shift in array to the first byte after the header
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iHTMLEnd, // EndHTML -- shift in array of last byte for HTML syntax analysis
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iFragStart,// StartFragment -- shift in array jast after <!--StartFragment-->
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iFragEnd, // EndFragment -- shift in array before start <!--EndFragment-->
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iSelStart, // StartSelection -- shift in array of the first char in copied selection
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iSelEnd; // EndSelection -- shift in array of the last char in copied selection
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private String stBaseURL; // SourceURL -- base URL for related referenses
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private String stVersion; // Version -- current supported version
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//Stream reader markers:
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private long iStartOffset,
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iEndOffset,
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iReadCount;
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private EHTMLReadMode readMode;
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public HTMLCodec(
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InputStream _bytestream,
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EHTMLReadMode _readMode) throws IOException
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{
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bufferedStream = new BufferedInputStream(_bytestream, BYTE_BUFFER_LEN);
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readMode = _readMode;
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}
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public synchronized String getBaseURL() throws IOException
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{
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if( !descriptionParsed ) {
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parseDescription();
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}
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return stBaseURL;
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}
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public synchronized String getVersion() throws IOException
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{
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if( !descriptionParsed ) {
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parseDescription();
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}
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return stVersion;
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}
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/**
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* parseDescription parsing HTML clipboard header as it described in
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* comment to convertToHTMLFormat
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*/
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private void parseDescription() throws IOException
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{
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stBaseURL = null;
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stVersion = null;
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// initialization of array offset pointers
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// to the same "uninitialized" state.
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iHTMLEnd =
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iHTMLStart =
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iFragEnd =
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iFragStart =
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iSelEnd =
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iSelStart = -1;
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bufferedStream.mark(BYTE_BUFFER_LEN);
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String astEntries[] = new String[] {
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//common
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VERSION,
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START_HTML,
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END_HTML,
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START_FRAGMENT,
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END_FRAGMENT,
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//ver 1.0
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START_SELECTION,
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END_SELECTION,
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SOURCE_URL
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};
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BufferedReader bufferedReader = new BufferedReader(
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new InputStreamReader(
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bufferedStream,
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ENCODING
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),
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CHAR_BUFFER_LEN
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);
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long iHeadSize = 0;
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long iCRSize = EOLN.length();
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int iEntCount = astEntries.length;
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boolean bContinue = true;
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for( int iEntry = 0; iEntry < iEntCount; ++iEntry ){
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String stLine = bufferedReader.readLine();
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if( null==stLine ) {
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break;
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}
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//some header entries are optional, but the order is fixed.
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for( ; iEntry < iEntCount; ++iEntry ){
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if( !stLine.startsWith(astEntries[iEntry]) ) {
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continue;
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}
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iHeadSize += stLine.length() + iCRSize;
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String stValue = stLine.substring(astEntries[iEntry].length()).trim();
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if( null!=stValue ) {
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try{
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switch( iEntry ){
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case 0:
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stVersion = stValue;
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break;
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case 1:
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iHTMLStart = Integer.parseInt(stValue);
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break;
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case 2:
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iHTMLEnd = Integer.parseInt(stValue);
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break;
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case 3:
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iFragStart = Integer.parseInt(stValue);
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break;
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case 4:
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iFragEnd = Integer.parseInt(stValue);
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break;
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case 5:
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iSelStart = Integer.parseInt(stValue);
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break;
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case 6:
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iSelEnd = Integer.parseInt(stValue);
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break;
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case 7:
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stBaseURL = stValue;
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break;
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};
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|
} catch ( NumberFormatException e ) {
|
|
throw new IOException(FAILURE_MSG + astEntries[iEntry]+ " value " + e + INVALID_MSG);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
//some entries could absent in HTML header,
|
|
//so we have find they by another way.
|
|
if( -1 == iHTMLStart )
|
|
iHTMLStart = iHeadSize;
|
|
if( -1 == iFragStart )
|
|
iFragStart = iHTMLStart;
|
|
if( -1 == iFragEnd )
|
|
iFragEnd = iHTMLEnd;
|
|
if( -1 == iSelStart )
|
|
iSelStart = iFragStart;
|
|
if( -1 == iSelEnd )
|
|
iSelEnd = iFragEnd;
|
|
|
|
//one of possible modes
|
|
switch( readMode ){
|
|
case HTML_READ_ALL:
|
|
iStartOffset = iHTMLStart;
|
|
iEndOffset = iHTMLEnd;
|
|
break;
|
|
case HTML_READ_FRAGMENT:
|
|
iStartOffset = iFragStart;
|
|
iEndOffset = iFragEnd;
|
|
break;
|
|
case HTML_READ_SELECTION:
|
|
default:
|
|
iStartOffset = iSelStart;
|
|
iEndOffset = iSelEnd;
|
|
break;
|
|
}
|
|
|
|
bufferedStream.reset();
|
|
if( -1 == iStartOffset ){
|
|
throw new IOException(FAILURE_MSG + "invalid HTML format.");
|
|
}
|
|
iReadCount = bufferedStream.skip(iStartOffset);
|
|
if( iStartOffset != iReadCount ){
|
|
throw new IOException(FAILURE_MSG + "Byte stream ends in description.");
|
|
}
|
|
descriptionParsed = true;
|
|
}
|
|
|
|
public synchronized int read() throws IOException {
|
|
if( closed ){
|
|
throw new IOException("Stream closed");
|
|
}
|
|
|
|
if( !descriptionParsed ){
|
|
parseDescription();
|
|
}
|
|
if( -1 != iEndOffset && iReadCount >= iEndOffset ) {
|
|
return -1;
|
|
}
|
|
|
|
int retval = bufferedStream.read();
|
|
if( retval == -1 ) {
|
|
return -1;
|
|
}
|
|
++iReadCount;
|
|
return retval;
|
|
}
|
|
|
|
public synchronized void close() throws IOException {
|
|
if( !closed ){
|
|
closed = true;
|
|
bufferedStream.close();
|
|
}
|
|
}
|
|
}
|