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litesoft / trunk / Java / GWT / Client / src / org / litesoft / GWT / client / logging / BrowserAsLogSyncFactory.java 

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// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client.logging;

import org.litesoft.GWT.client.*;
import org.litesoft.commonfoundation.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 );
        }
    }
}

Commits for litesoft/trunk/Java/GWT/Client/src/org/litesoft/GWT/client/logging/BrowserAsLogSyncFactory.java

Diff revisions: vs.
Revision Author Commited Message
948 Diff Diff GeorgeS picture GeorgeS Sat 07 Jun, 2014 23:42:39 +0000

Jusefuls Formatter Updated to New Code Format
947 Diff Diff GeorgeS picture GeorgeS Fri 06 Jun, 2014 23:36:56 +0000

Correct Spelling of package!
939 Diff Diff GeorgeS picture GeorgeS Mon 02 Jun, 2014 21:30:31 +0000

Extracting commonfoundation
822 Diff Diff GeorgeS picture GeorgeS Sun 19 Aug, 2012 01:03:51 +0000
151 Diff Diff GeorgeS picture GeorgeS Thu 17 Mar, 2011 04:16:22 +0000
49 Diff Diff GeorgeS picture GeorgeS Mon 12 Apr, 2010 02:59:10 +0000

License Text
23 Diff Diff GeorgeS picture GeorgeS Wed 24 Feb, 2010 00:34:32 +0000
2 GeorgeS picture GeorgeS Sun 07 Feb, 2010 12:50:58 +0000

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