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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2006 STZ-IDA, Germany, http://www.stz-ida.de
License:
LGPL: http://www.gnu.org/licenses/lgpl.html
EPL: http://www.eclipse.org/org/documents/epl-v10.php
See the LICENSE file in the project's top-level directory for details.
Authors:
* Til Schneider (til132)
************************************************************************ */
/* ************************************************************************
#module(log)
************************************************************************ */
/**
* An appender that writes all messages to a div element.
*
* This class does not depend on qooxdoo widgets, so it also works when there
* are problems with widgets or when the widgets are not yet initialized.
*
* @param divId {String ? "qx_log"} the ID of the div element to write the
* messages to.
*/
qx.OO.defineClass("qx.log.DivAppender", qx.log.Appender,
function(divId) {
qx.log.Appender.call(this);
this._divId = divId ? divId : "qx_log";
});
/**
* The maximum number of messages to show. If null the number of messages is not
* limited.
*/
qx.OO.addProperty({ name:"maxMessages", type:"number", defaultValue:500 });
// overridden
qx.OO.changeProperty({ name:"useLongFormat", type:"boolean", defaultValue:false, allowNull:false });
/** The CSS class name for the head div {containing the clear button}. */
qx.OO.addProperty({ name:"headClassName", type:"string", defaultValue:"log-head" });
/** The CSS class name for the body div {containing the log messages}. */
qx.OO.addProperty({ name:"bodyClassName", type:"string", defaultValue:"log-body" });
/** The CSS class name for a div showing the name of the current group. */
qx.OO.addProperty({ name:"groupClassName", type:"string", defaultValue:"log-group" });
/** The CSS class name for a div showing a debug message. */
qx.OO.addProperty({ name:"debugClassName", type:"string", defaultValue:"log-debug" });
/** The CSS class name for a div showing a info message. */
qx.OO.addProperty({ name:"infoClassName", type:"string", defaultValue:"log-info" });
/** The CSS class name for a div showing a warn message. */
qx.OO.addProperty({ name:"warnClassName", type:"string", defaultValue:"log-warn" });
/** The CSS class name for a div showing a error message. */
qx.OO.addProperty({ name:"errorClassName", type:"string", defaultValue:"log-error" });
/**
* Creates an onclick handler that clears a div element. This method is used to
* create a minimum closure.
*
* @param logElem {Element} the element to clear when the handler is called.
* @return {Function} the handler.
*/
qx.Proto._createClearButtonHandler = function(logElem) {
return function(evt) {
logElem.innerHTML = "";
}
}
// overridden
qx.Proto.appendLogEvent = function(evt) {
var Logger = qx.log.Logger;
// Initialize the log element if nessesary
if (this._logElem == null) {
var divElem = document.getElementById(this._divId);
if (divElem == null) {
throw new Error("Logging div with ID " + this._divId + " not found");
}
divElem.innerHTML = '<div class="' + this.getHeadClassName() + '"><button>Clear</button></div>'
+ '<div class="' + this.getBodyClassName() + '"></div>';
this._clearBt = divElem.firstChild.firstChild;
this._logElem = divElem.lastChild;
this._clearBt.onclick = this._createClearButtonHandler(this._logElem);
}
// Append the group when needed
var group = evt.logger.getName();
if (evt.instanceId != null) {
group += "[" + evt.instanceId + "]";
}
if (group != this._lastGroup) {
var elem = document.createElement("div");
elem.className = this.getGroupClassName();
elem.innerHTML = group;
this._logElem.appendChild(elem);
this._lastGroup = group;
}
// Append the message
var elem = document.createElement("div");
switch (evt.level) {
case Logger.LEVEL_DEBUG: elem.className = this.getDebugClassName(); break;
case Logger.LEVEL_INFO: elem.className = this.getInfoClassName(); break;
case Logger.LEVEL_WARN: elem.className = this.getWarnClassName(); break;
case Logger.LEVEL_ERROR: elem.className = this.getErrorClassName(); break;
}
elem.innerHTML = this.formatLogEvent(evt).replace(/&/g, "&")
.replace(/</g, "<").replace(/ /g, "  ").replace(/[\n]/g, "<br>");
this._logElem.appendChild(elem);
// Remove superflous messages
while (this._logElem.childNodes.length > this.getMaxMessages()) {
this._logElem.removeChild(this._logElem.firstChild);
if (this._removedMessageCount == null) {
this._removedMessageCount = 1;
} else {
this._removedMessageCount++;
}
}
if (this._removedMessageCount != null) {
this._logElem.firstChild.className = "";
this._logElem.firstChild.innerHTML = "(" + this._removedMessageCount
+ " messages removed)";
}
}
// overridden
qx.Proto.dispose = function() {
if (this.getDisposed()) {
return true;
}
if (this._clearBt) {
this._clearBt.onclick = null;
this._clearBt = null;
}
this._logElem = null;
return qx.log.Appender.prototype.dispose.call(this);
}
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