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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2006 by STZ-IDA, Germany, http://www.stz-ida.de
License:
LGPL 2.1: http://www.gnu.org/licenses/lgpl.html
Authors:
* Til Schneider (til132)
************************************************************************ */
/* ************************************************************************
#module(core)
#module(log)
************************************************************************ */
/**
* An appender that writes all messages to a log window.
* <p>
* 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 name {string ? "qx_log"} the name of the log window.
*/
qx.OO.defineClass("qx.dev.log.WindowAppender", qx.dev.log.Appender,
function(name) {
qx.dev.log.Appender.call(this);
this._id = qx.dev.log.WindowAppender.register(this);
this._name = (name == null) ? "qx_log" : name;
this._logWindowOpened = false;
});
/**
* 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 });
/** Whether the window should appear under the main window. */
qx.OO.addProperty({ name:"popUnder", type:"boolean", defaultValue:false, allowNull:false });
/**
* Creates and opens the log window if it doesn't alread exist.
*/
qx.Proto.openWindow = function() {
if (this._logWindowOpened) {
// The window is already open -> Nothing to do
return;
}
// Open the logger window
var winWidth = 600;
var winHeight = 350;
var winLeft = window.screen.width - winWidth;
var winTop = window.screen.height - winHeight;
var params = "toolbar=no,scrollbars=yes,resizable=yes,"
+ "width=" + winWidth + ",height=" + winHeight
+ ",left=" + winLeft + ",top=" + winTop;
// NOTE: In window.open the browser will process the event queue.
// Which means that other log events may arrive during this time.
// The log window is then in an inconsistent state, because the
// this._logElem is not created yet. These events will be added to the
// this._logEventQueue and logged after this._logElem is created.
this._logWindow = window.open("", this._name, params);
if (!this._logWindow || this._logWindow.closed)
{
if (!this._popupBlockerWarning) {
alert("Couldn't open debug window. Please disable your popup blocker!");
}
this._popupBlockerWarning = true;
return;
}
// Seems to be OK now.
this._popupBlockerWarning = false;
// Store that window is open
this._logWindowOpened = true;
if (this.getPopUnder()) {
this._logWindow.blur();
window.focus();
}
var logDocument = this._logWindow.document;
// NOTE: We have to use a static onunload handler, because an onunload
// that is set later using DOM is ignored completely.
// (at least in Firefox, but maybe in IE, too)
logDocument.open();
logDocument.write("<html><head><title>" + this._name + "</title></head>"
+ '<body onload="qx = opener.qx;" onunload="try{qx.dev.log.WindowAppender._registeredAppenders[' + this._id + '].closeWindow()}catch(e){}">'
+ '<pre id="log" wrap="wrap" style="font-size:11"></pre></body></html>');
logDocument.close();
this._logElem = logDocument.getElementById("log");
// Log the events from the queue
if (this._logEventQueue != null) {
for (var i = 0; i < this._logEventQueue.length; i++) {
this.appendLogEvent(this._logEventQueue[i]);
}
this._logEventQueue = null;
}
}
/**
* Closes the log window.
*/
qx.Proto.closeWindow = function() {
if (this._logWindow != null) {
this._logWindow.close();
this._logWindow = null;
this._logElem = null;
this._logWindowOpened = false;
}
}
// overridden
qx.Proto.appendLogEvent = function(evt) {
if (!this._logWindowOpened) {
this._logEventQueue = [];
this._logEventQueue.push(evt);
this.openWindow();
// Popup-Blocker was active!
if (!this._logWindowOpened) {
return;
}
} else if (this._logElem == null) {
// The window is currenlty opening, but not yet finished
// -> Put the event in the queue
this._logEventQueue.push(evt);
} else {
var divElem = this._logWindow.document.createElement("div");
if (evt.level == qx.dev.log.Logger.LEVEL_ERROR) {
divElem.style.backgroundColor = "#FFEEEE";
} else if (evt.level == qx.dev.log.Logger.LEVEL_DEBUG) {
divElem.style.color = "gray";
}
divElem.innerHTML = this.formatLogEvent(evt).replace(/&/g, "&")
.replace(/</g, "<").replace(/ /g, "  ").replace(/[\n]/g, "<br>");
this._logElem.appendChild(divElem);
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.innerHTML = "(" + this._removedMessageCount
+ " messages removed)";
}
// Scroll to bottom
this._logWindow.scrollTo(0, this._logElem.offsetHeight);
}
}
// overridden
qx.Proto.dispose = function() {
if (this.getDisposed()) {
return true;
}
this.closeWindow();
return qx.dev.log.Appender.prototype.dispose.call(this);
}
qx.Class._nextId = 1;
qx.Class._registeredAppenders = {};
/**
* Registers a WindowAppender. This is used by the WindowAppender internally.
* You don't have to call this.
*
* @param appender {WindowAppender} the WindowAppender to register.
* @return {int} the ID.
*/
qx.Class.register = function(appender) {
var WindowAppender = qx.dev.log.WindowAppender;
var id = WindowAppender._nextId++;
WindowAppender._registeredAppenders[id] = appender;
return id;
}
/**
* Returns a prviously registered WindowAppender.
*
* @param id {int} the ID of the wanted WindowAppender.
* @return {WindowAppender} the WindowAppender or null if no
* WindowAppender with this ID is registered.
*/
qx.Class.getAppender = function(id) {
return qx.dev.log.WindowAppender._registeredAppenders[id];
}
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