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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.GWT.client.logging;
import org.litesoft.GWT.client.*;
import org.litesoft.core.typeutils.*;
import org.litesoft.logger.*;
import org.litesoft.logger.nonpublic.*;
import com.google.gwt.user.client.*;
public class BrowserAsLogSyncFactory implements ProxyLoggerFactory
{
public static final int MAX_LOG_LINES_TO_CACHE = 100;
public static final BrowserAsLogSyncFactory INSTANCE = new BrowserAsLogSyncFactory();
public static final Command COMMAND = new Command()
{
@Override
public void execute()
{
BrowserAsLogSyncFactory.open();
}
};
private BrowserAsLogSyncFactory()
{
}
public static void open()
{
if ( (sOpen = openLogSyncBrowser( UtilsGwt.CHROMELESS_SCROLLED, CLIENT_LOGGING_HTML )) )
{
sOpen = addToLogSyncBrowser( "" );
while ( sOpen && sSavedLines.hasLines() )
{
if ( (sOpen = addToLogSyncBrowser( sSavedLines.peekLine() )) )
{
sSavedLines.dropLine();
}
}
}
}
public static void log( String pText )
{
if ( sOpen )
{
if ( addToLogSyncBrowser( pText ) )
{
return;
}
sOpen = false;
}
sSavedLines.add( pText );
}
private static LogLinkedList sSavedLines = new LogLinkedList();
private static boolean sOpen = false;
public static native boolean openLogSyncBrowser( String pFeatures, String pHTML ) /*-{
$wnd.loggingWindow = $wnd.open( "", "", pFeatures );
if ( !$wnd.loggingWindow )
{
return false;
}
$wnd.loggingWindow.document.write( pHTML );
$wnd.loggingWindow.document.close();
return true;
}-*/;
public static native boolean addToLogSyncBrowser( String pText )/*-{
if ( $wnd.loggingWindow )
{
try
{
var zThierLog = $wnd.loggingWindow.appendToLog;
if ( zThierLog )
{
zThierLog( pText );
return true;
}
}
catch ( e )
{
}
$wnd.loggingWindow = null;
}
return false;
}-*/;
private static class LogLinkedList
{
private int mNodes = 0;
private Node mHead = null;
private Node mTail = null;
public boolean hasLines()
{
return (mNodes != 0);
}
public String peekLine()
{
return (mHead != null) ? mHead.getText() : null;
}
public void dropLine()
{
if ( hasLines() )
{
mNodes--;
if ( null == (mHead = mHead.getNext()) )
{
mTail = null;
}
}
}
public void add( String pText )
{
if ( mTail == null )
{
mHead = mTail = new Node( pText );
}
else
{
mTail = mTail.add( pText );
}
if ( ++mNodes > MAX_LOG_LINES_TO_CACHE )
{
mNodes--;
mHead = mHead.getNext();
}
}
private static class Node
{
private Node mNext = null;
private String mText;
public Node( String pText )
{
mText = pText;
}
public Node getNext()
{
return mNext;
}
public String getText()
{
return mText;
}
public Node add( String pText )
{
return mNext = new Node( pText );
}
}
}
private static final String CLIENT_LOGGING_HTML = "<html><head><title>Client Side Log</title><script>\n" + //
"function appendToLog( pLogEntry )\n" + //
"{\n" + //
" var myBody = document.body;\n" + //
" var preNode = document.createElement( 'pre' );\n" + //
" preNode.style.margin = '0';\n" + //
" myBody.appendChild( preNode );\n" + //
" var txtNode = document.createTextNode( pLogEntry );\n" + //
" preNode.appendChild( txtNode );\n" + //
" document.close();\n" + //
"}\n" + //
"</script></head><body style='margin:0; padding:0;'>" + //
"<center>Client Side Logging<br>" + //
"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" + "</center></body></html>";
@Override
public ImplLoggerAdapter createImplLoggerAdapter( int pLevel, String pClassname )
{
return new Logger( pLevel, pClassname );
}
private static class Logger extends SystemOutLoggerAdapter
{
public Logger( int pLevel, String pClassname )
{
super( LoggerLevel.LEVELS[pLevel], pClassname );
}
@Override
protected void println( Throwable pThrowable )
{
super.println( pThrowable );
BrowserAsLogSyncFactory.log( Throwables.printStackTraceToString( pThrowable ) );
}
@Override
protected void println( boolean pHasThrowable, String pText )
{
super.println( pHasThrowable, pText );
BrowserAsLogSyncFactory.log( pText );
}
}
}
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