[gwt-log] WindowLogger

[Trung]

Would like to modify WindowLogger as below:

// File client/WindowLogger
package com.allen_sauer.gwt.log.client;

import com.allen_sauer.gwt.log.client.util.DOMUtil;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.Window;

public class WindowLogger extends AbstractLogger implements
Window.ClosingHandler, CloseHandler{
  private static final String CSS_LOG_MESSAGE = "log-message";
  private static final String STACKTRACE_ELEMENT_PREFIX =
"    at ";

  private JavaScriptObject loggingWindow;

  public WindowLogger() {
    init(this);
    Window.addWindowClosingHandler(this);
    Window.addCloseHandler(this);
  }

  public void openLoggingWindow(){
    if (loggingWindow == null){
      loggingWindow = open(GWT.getModuleBaseURL() + "/logging.html",
"", "");
    }
  }

  @Override
  public boolean isSupported(){
    return true;
  }

  public void log(int logLevel, String message){
    assert false;
    // Method never called since {...@link #log(int, String, Throwable)}
is
    // overridden
  }

  @Override
  public void log(int logLevel, String message, Throwable throwable){
    String text = message.replaceAll("<", "&lt;").replaceAll(">",
"&gt;");
    String title = makeTitle(message, throwable);
    if (throwable != null) {
      while (throwable != null) {
        text += throwable.getClass().getName() + ":<br><b>" +
throwable.getMessage() + "</b>";
        StackTraceElement[] stackTraceElements =
throwable.getStackTrace();
        if (stackTraceElements.length > 0) {
          text += "<div class='log-stacktrace'>";
          for (StackTraceElement element : stackTraceElements) {
            text += STACKTRACE_ELEMENT_PREFIX + element + "<br>";
          }
          text += "</div>";
        }
        throwable = throwable.getCause();
        if (throwable != null) {
          text += "Caused by: ";
        }
      }
    }
    text = text.replaceAll("\r\n|\r|\n", "<BR>");
    text = "<div class='" + CSS_LOG_MESSAGE
        + "' onmouseover='className+=\" log-message-hover\"' "
        + "onmouseout='className=className.replace(/ log-message-hover/
g,\"\")' style='color: "
        + getColor(logLevel) + "' title='" + title + "'>" + text + "</
div>";

    if (loggingWindow != null){
      logTextInLoggingWindow(loggingWindow, text);
    }
  }

  public void onWindowClosing(Window.ClosingEvent event) {
    if (loggingWindow != null){
      closeLoggingWindow(loggingWindow);
    }
  }

  public void onClose(CloseEvent event) {
    if (loggingWindow != null){
      closeLoggingWindow(loggingWindow);
    }
  }

  private static native void init(WindowLogger me) /*-{
    $wnd.windowLogger = {
      onLoggingWindowClosed: function(){
 
m...@com.allen_sauer.gwt.log.client.windowlogger::onLoggingWindowClosedCallback
()();
      },
      abc: function(){
      }
    };
  }-*/;

  private static native JavaScriptObject open(String url, String name,
String features) /*-{
    var w = $wnd.open(url, name, features);
    $wnd.focus();
    return w;
  }-*/;

  private static native void closeLoggingWindow(JavaScriptObject
loggingWindow) /*-{
    loggingWindow.close();
  }-*/;

  /**
   * Called from javascript
   */
  private void onLoggingWindowClosedCallback(){
    Window.alert("set loggingWindow = null");
    loggingWindow = null;
  }

  private static native void logTextInLoggingWindow(JavaScriptObject
loggingWindow, String text) /*-{
    loggingWindow.logText(text);
  }-*/;

  private String makeTitle(String message, Throwable throwable) {
    if (throwable != null) {
      if (throwable.getMessage() == null) {
        message = throwable.getClass().getName();
      } else {
        message = throwable.getMessage().replaceAll(
            throwable.getClass().getName().replaceAll("^(.+\\.).+$",
"$1"), "");
      }
    }
    return DOMUtil.adjustTitleLineBreaks(message).replaceAll("<",
"&lt;").replaceAll(">", "&gt;").replaceAll(
        "'", "\"");
  }

  private String getColor(int logLevel) {
    if (logLevel == Log.LOG_LEVEL_OFF) {
      return "#000"; // black
    }
    if (logLevel >= Log.LOG_LEVEL_FATAL) {
      return "#F00"; // bright red
    }
    if (logLevel >= Log.LOG_LEVEL_ERROR) {
      return "#C11B17"; // dark red
    }
    if (logLevel >= Log.LOG_LEVEL_WARN) {
      return "#E56717"; // dark orange
    }
    if (logLevel >= Log.LOG_LEVEL_INFO) {
      return "#2B60DE"; // blue
    }
    if (logLevel >= Log.LOG_LEVEL_DEBUG) {
      return "#20b000"; // green
    }
    return "#F0F"; // purple
  }
}


// File public/logging.html
<html>
  <head>
    <title>Logging Window</title>
    <script language='javascript'>
      function informOpener(){
        window.opener.windowLogger.onLoggingWindowClosed();
      }

      function logText(text){
        document.body.innerHTML = document.body.innerHTML + text;

        document.body['scrollTop'] = 1000000;
      }
    </script>
  </head>
  <body onbeforeunload="informOpener()">
  </body>
</html>


Hope this help.
Cheers

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