1 files changed, 136 insertions, 0 deletions
diff --git a/itjs/boot.js b/itjs/boot.js
new file mode 100644
index 0000000..8ca539f
--- /dev/null
+++ b/itjs/boot.js
@@ -0,0 +1,136 @@
+// $Id$
+
+var it_boot_status = "";
+var it_panictimer = window.setTimeout("it_panic(it_boot_status)", 31337);
+var it_catcherrstart = new Date().getTime();
+
+function it_catcherr(msg, url, line)
+{
+	var stacktrace = "";
+
+	for (var c = it_catcherr.caller; c != null; c = c.caller)
+	{
+		var funcname = c.toString().match(/function (\w*)/)[1];
+		stacktrace += (funcname ? funcname : "anon") + "/";
+
+		if (c.caller == c)	// Break simple recursion
+		{
+			stacktrace += "*";
+			break;
+		}
+	}
+
+	it_boot_report(msg, url, line, stacktrace);
+
+	return !window.env || !!window.env.is_live_server;	// No env or live server -> suppress error
+}
+
+window.onerror = it_catcherr;
+
+function it_boot_addparam(url, param)
+{
+	return url + (url.match(/\?/) ? "&" : "?") + param;
+}
+
+function it_panic(msg)
+{
+	window.setTimeout("document.location.href = it_boot_addparam(document.location.href, 'static=" + msg + "')", 500);
+	return it_catcherr('panic ' + msg, '-', -1);
+}
+
+
+function it_boot_report(msg, file, line, error)
+{
+	window.clearTimeout(window.it_domtimer);
+	window.clearTimeout(window.it_panictimer);
+
+	new Image().src = "/itjs/error.gif/" + escape(msg) + "|" + escape(file) + "|" + line + "|" + (new Date().getTime() - it_catcherrstart) + "|" + escape(error);
+}
+
+function it_boot(file, isretry)
+{
+	window.it_domtimer = null;
+	var doc = document;
+	var dom = doc && (dom = document.getElementById('it_boot_dom'));	// HTML has been rendered
+	var view = dom && doc.defaultView;	// We can check if stylesheet is active
+	var style = view && view.getComputedStyle && view.getComputedStyle(dom, '');
+	var css = style && style.getPropertyValue && (style.getPropertyValue("visibility") == "hidden");	// CSS active (inline style on tag)
+	var stylesheet = style && style.getPropertyValue && (style.getPropertyValue("display") == "none");	// External stylesheet loaded
+
+	if (!(doc || !(it_boot_status = "doc")) || !(dom || !(it_boot_status = "dom")) || (style && (style.length > 0) && !(stylesheet || !(it_boot_status = "stylesheet"))))
+	{
+		window.it_domtimer = window.setTimeout("it_boot('" + file + "')" , 42);
+
+		if (style && !css)
+			it_panic("css");
+
+		return;
+	}
+
+	try
+	{
+		var loader = new XMLHttpRequest();
+	}
+	catch (e)
+	{
+		var classnames = [ 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP' ];
+
+		for (var i in classnames)
+			try { loader = new ActiveXObject(classnames[i]); break; } catch (e) {}
+	}
+
+	if (loader)
+	{
+		loader.open("GET", it_boot_addparam(file, "boot=1" + (isretry ? "&retry=1" : "")));
+		loader.onreadystatechange = function()
+		{
+			var error = "";
+
+			if (loader.readyState == 4)
+			{
+				if (loader.status < 400)	// Opera gives back 304 if from cache
+				{
+					try
+					{
+						var data = eval("(" + loader.responseText + ")");
+
+						if (data.code.length == data.len)
+						{
+							var code = "try {" + data.code + ";window.it_boot_init()} catch (e) { it_boot_report('Load error', '-', -1, e); }";	// Wrapped in try/catch as Konqueror does not support window.onerror
+							isretry = true;	// No further retry after this point
+
+							if (window.execScript)
+								window.execScript(code, "javascript");	// IE work-around to get script executed in global scope
+							else
+								window.setTimeout(code, 0);	// Standard compliant version
+						}
+						else
+							error = "Length mismatch " + data.code.length + " != " + data.len;
+					}
+					catch (e)
+					{
+						for (i in e)
+							error += i + "=" + e[i] + ";";
+					}
+				}
+				else
+					error = loader.statusText;
+
+				if (error)
+				{
+					if (isretry)
+						it_boot_report('Load error on retry', file, -1, error);
+					else
+						it_boot(file, true);
+				}
+			}
+		}
+		loader.send(null);
+	}
+	else
+	{
+		var tag = document.createElement("script");
+		tag.src = it_boot_addparam(file, 'init=1');
+		dom.appendChild(tag);
+	}
+}