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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.glass.ui.win;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.io.File;
import java.net.URL;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.ArrayList;
final class WinHTMLCodec {
public static final String defaultCharset = "UTF-8";
public static byte[] encode(byte[] html) {
return HTMLCodec.convertToHTMLFormat(html);
}
public static byte[] decode(byte[] data) {
try {
ByteArrayInputStream bais = new ByteArrayInputStream(data);
InputStream is = new HTMLCodec(bais, EHTMLReadMode.HTML_READ_SELECTION);
// the initial size is larger, but we avoid relocations
ByteArrayOutputStream baos = new ByteArrayOutputStream(data.length);
// Very inefficient. But clipboard operations shouldn't be super fast either.
// Might use available() to estimate a buffer size, and copy blocks instead.
int b;
while ((b = is.read()) != -1) {
baos.write(b);
}
return baos.toByteArray();
} catch (IOException ex) {
throw new RuntimeException("Unexpected IOException caught", ex);
}
}
}
// ***************************************************************************
// The code below is copied from JDK unmodified
// ***************************************************************************
enum EHTMLReadMode {
HTML_READ_ALL,
HTML_READ_FRAGMENT,
HTML_READ_SELECTION
}
/**
* on decode: This stream takes an InputStream which provides data in CF_HTML format,
* strips off the description and context to extract the original HTML data.
*
* on encode: static convertToHTMLFormat is responsible for HTML clipboard header creation
*/
class HTMLCodec extends InputStream {
//static section
public static final String ENCODING = "UTF-8";
public static final String VERSION = "Version:";
public static final String START_HTML = "StartHTML:";
public static final String END_HTML = "EndHTML:";
public static final String START_FRAGMENT = "StartFragment:";
public static final String END_FRAGMENT = "EndFragment:";
public static final String START_SELECTION = "StartSelection:"; //optional
public static final String END_SELECTION = "EndSelection:"; //optional
public static final String START_FRAGMENT_CMT = "";
public static final String END_FRAGMENT_CMT = "";
public static final String SOURCE_URL = "SourceURL:";
public static final String DEF_SOURCE_URL = "about:blank";
public static final String EOLN = "\r\n";
private static final String VERSION_NUM = "1.0";
private static final int PADDED_WIDTH = 10;
private static String toPaddedString(int n, int width) {
String string = "" + n;
int len = string.length();
if (n >= 0 && len < width) {
char[] array = new char[width - len];
Arrays.fill(array, '0');
StringBuffer buffer = new StringBuffer(width);
buffer.append(array);
buffer.append(string);
string = buffer.toString();
}
return string;
}
/**
* convertToHTMLFormat adds the MS HTML clipboard header to byte array that
* contains the parameters pairs.
*
* The consequence of parameters is fixed, but some or all of them could be
* omitted. One parameter per one text line.
* It looks like that:
*
* Version:1.0\r\n -- current supported version
* StartHTML:000000192\r\n -- shift in array to the first byte after the header
* EndHTML:000000757\r\n -- shift in array of last byte for HTML syntax analysis
* StartFragment:000000396\r\n -- shift in array jast after
* EndFragment:000000694\r\n -- shift in array before start
* StartSelection:000000398\r\n -- shift in array of the first char in copied selection
* EndSelection:000000692\r\n -- shift in array of the last char in copied selection
* SourceURL:http://sun.com/\r\n -- base URL for related referenses
* ..............................
* ^ ^ ^ ^^ ^
* \ StartHTML | \-StartSelection | \EndFragment EndHTML/
* \-StartFragment \EndSelection
*
*Combinations with tags sequence
*......
* or
*.........
* are vailid too.
*/
public static byte[] convertToHTMLFormat(byte[] bytes) {
// Calculate section offsets
String htmlPrefix = "";
String htmlSuffix = "";
{
//we have extend the fragment to full HTML document correctly
//to avoid HTML and BODY tags doubling
String stContext = new String(bytes);
String stUpContext = stContext.toUpperCase();
if( -1 == stUpContext.indexOf("";
htmlSuffix = "" + htmlSuffix;
};
};
htmlPrefix = htmlPrefix + START_FRAGMENT_CMT;
htmlSuffix = END_FRAGMENT_CMT + htmlSuffix;
}
String stBaseUrl = DEF_SOURCE_URL;
int nStartHTML =
VERSION.length() + VERSION_NUM.length() + EOLN.length()
+ START_HTML.length() + PADDED_WIDTH + EOLN.length()
+ END_HTML.length() + PADDED_WIDTH + EOLN.length()
+ START_FRAGMENT.length() + PADDED_WIDTH + EOLN.length()
+ END_FRAGMENT.length() + PADDED_WIDTH + EOLN.length()
+ SOURCE_URL.length() + stBaseUrl.length() + EOLN.length()
;
int nStartFragment = nStartHTML + htmlPrefix.length();
int nEndFragment = nStartFragment + bytes.length - 1;
int nEndHTML = nEndFragment + htmlSuffix.length();
StringBuilder header = new StringBuilder(
nStartFragment
+ START_FRAGMENT_CMT.length()
);
//header
header.append(VERSION);
header.append(VERSION_NUM);
header.append(EOLN);
header.append(START_HTML);
header.append(toPaddedString(nStartHTML, PADDED_WIDTH));
header.append(EOLN);
header.append(END_HTML);
header.append(toPaddedString(nEndHTML, PADDED_WIDTH));
header.append(EOLN);
header.append(START_FRAGMENT);
header.append(toPaddedString(nStartFragment, PADDED_WIDTH));
header.append(EOLN);
header.append(END_FRAGMENT);
header.append(toPaddedString(nEndFragment, PADDED_WIDTH));
header.append(EOLN);
header.append(SOURCE_URL);
header.append(stBaseUrl);
header.append(EOLN);
//HTML
header.append(htmlPrefix);
byte[] headerBytes = null, trailerBytes = null;
try {
headerBytes = header.toString().getBytes(ENCODING);
trailerBytes = htmlSuffix.getBytes(ENCODING);
} catch (UnsupportedEncodingException cannotHappen) {
return null;
}
byte[] retval = new byte[headerBytes.length + bytes.length +
trailerBytes.length];
System.arraycopy(headerBytes, 0, retval, 0, headerBytes.length);
System.arraycopy(bytes, 0, retval, headerBytes.length,
bytes.length - 1);
System.arraycopy(trailerBytes, 0, retval,
headerBytes.length + bytes.length - 1,
trailerBytes.length);
retval[retval.length-1] = 0;
return retval;
}
////////////////////////////////////
//decoder instance data and methods:
private final BufferedInputStream bufferedStream;
private boolean descriptionParsed = false;
private boolean closed = false;
// InputStreamReader uses an 8K buffer. The size is not customizable.
public static final int BYTE_BUFFER_LEN = 8192;
// CharToByteUTF8.getMaxBytesPerChar returns 3, so we should not buffer
// more chars than 3 times the number of bytes we can buffer.
public static final int CHAR_BUFFER_LEN = BYTE_BUFFER_LEN / 3;
private static final String FAILURE_MSG =
"Unable to parse HTML description: ";
private static final String INVALID_MSG =
" invalid";
//HTML header mapping:
private long iHTMLStart,// StartHTML -- shift in array to the first byte after the header
iHTMLEnd, // EndHTML -- shift in array of last byte for HTML syntax analysis
iFragStart,// StartFragment -- shift in array jast after
iFragEnd, // EndFragment -- shift in array before start
iSelStart, // StartSelection -- shift in array of the first char in copied selection
iSelEnd; // EndSelection -- shift in array of the last char in copied selection
private String stBaseURL; // SourceURL -- base URL for related referenses
private String stVersion; // Version -- current supported version
//Stream reader markers:
private long iStartOffset,
iEndOffset,
iReadCount;
private EHTMLReadMode readMode;
public HTMLCodec(
InputStream _bytestream,
EHTMLReadMode _readMode) throws IOException
{
bufferedStream = new BufferedInputStream(_bytestream, BYTE_BUFFER_LEN);
readMode = _readMode;
}
public synchronized String getBaseURL() throws IOException
{
if( !descriptionParsed ) {
parseDescription();
}
return stBaseURL;
}
public synchronized String getVersion() throws IOException
{
if( !descriptionParsed ) {
parseDescription();
}
return stVersion;
}
/**
* parseDescription parsing HTML clipboard header as it described in
* comment to convertToHTMLFormat
*/
private void parseDescription() throws IOException
{
stBaseURL = null;
stVersion = null;
// initialization of array offset pointers
// to the same "uninitialized" state.
iHTMLEnd =
iHTMLStart =
iFragEnd =
iFragStart =
iSelEnd =
iSelStart = -1;
bufferedStream.mark(BYTE_BUFFER_LEN);
String astEntries[] = new String[] {
//common
VERSION,
START_HTML,
END_HTML,
START_FRAGMENT,
END_FRAGMENT,
//ver 1.0
START_SELECTION,
END_SELECTION,
SOURCE_URL
};
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(
bufferedStream,
ENCODING
),
CHAR_BUFFER_LEN
);
long iHeadSize = 0;
long iCRSize = EOLN.length();
int iEntCount = astEntries.length;
boolean bContinue = true;
for( int iEntry = 0; iEntry < iEntCount; ++iEntry ){
String stLine = bufferedReader.readLine();
if( null==stLine ) {
break;
}
//some header entries are optional, but the order is fixed.
for( ; iEntry < iEntCount; ++iEntry ){
if( !stLine.startsWith(astEntries[iEntry]) ) {
continue;
}
iHeadSize += stLine.length() + iCRSize;
String stValue = stLine.substring(astEntries[iEntry].length()).trim();
if( null!=stValue ) {
try{
switch( iEntry ){
case 0:
stVersion = stValue;
break;
case 1:
iHTMLStart = Integer.parseInt(stValue);
break;
case 2:
iHTMLEnd = Integer.parseInt(stValue);
break;
case 3:
iFragStart = Integer.parseInt(stValue);
break;
case 4:
iFragEnd = Integer.parseInt(stValue);
break;
case 5:
iSelStart = Integer.parseInt(stValue);
break;
case 6:
iSelEnd = Integer.parseInt(stValue);
break;
case 7:
stBaseURL = stValue;
break;
};
} 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.");
}
int curOffset = 0;
while (curOffset < iStartOffset){
curOffset += bufferedStream.skip(iStartOffset - curOffset);
}
iReadCount = curOffset;
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();
}
}
}
