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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2007 1&1 Internet AG, Germany, http://www.1and1.org
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:
* Sebastian Werner (wpbasti)
* Andreas Ecker (ecker)
************************************************************************ */
/* ************************************************************************
#module(core)
************************************************************************ */
/**
* This singleton manage global resource aliases
*
* @event change {qx.event.type.Event}
*/
qx.OO.defineClass("qx.manager.object.AliasManager", qx.core.Target,
function()
{
qx.core.Target.call(this);
// Contains defined aliases (like icons/, widgets/, application/, ...)
this._aliases = {};
// Containes computed paths
this._uris = {};
// Define static alias from setting
this.add("static", this.getSetting("staticUri"));
});
/*
---------------------------------------------------------------------------
DEFAULT SETTINGS
---------------------------------------------------------------------------
*/
qx.Settings.setDefault("resourceUri", "../../resource");
qx.Settings.setDefault("staticUri", qx.Settings.getValue("resourceUri") + "/static");
/*
---------------------------------------------------------------------------
ALIAS MANAGMENT
---------------------------------------------------------------------------
*/
/**
* Define an alias to a resource path
*
* @param vAlias {String} alias name for the resource path/url
* @param vUriStart {String} first part of URI for all images which use this alias
*/
qx.Proto.add = function(vAlias, vUriStart)
{
this._aliases[vAlias] = vUriStart;
// Cleanup old uris which use this alias
for (var vPath in this._uris)
{
if (vPath.substring(0, vPath.indexOf("/")) == vAlias) {
this._uris[vPath] = null;
}
}
// Fire change event (for ImageManager, etc.)
this.createDispatchEvent("change");
}
/**
* Remove a previously defined alias
*
* @param vAlias {String} alias name for the resource path/url
*/
qx.Proto.remove = function(vAlias)
{
delete this._aliases[vAlias];
// Cleanup old uris which use this alias
for (var vPath in this._uris)
{
if (vPath.substring(0, vPath.indexOf("/")) == vAlias) {
this._uris[vPath] = null;
}
}
// Fire change event (for ImageManager, etc.)
this.createDispatchEvent("change");
}
/**
* Resolve an alias to the actual resource path/url
*
* @param vAlias {String} alias name for the resource path/url
* @return {String} resource path/url
*/
qx.Proto.resolve = function(vAlias) {
return this._aliases[vAlias];
}
/*
---------------------------------------------------------------------------
URI HANDLING
---------------------------------------------------------------------------
*/
/**
* Resolve a path name to a resource URI taking the defined aliases into account
* and cache the result.
*
* If the first part of the path is a defined alias, the alias is resolved.
* Otherwhise the path is returned unmodified.
*
* @param vPath {String} path name
* @param vForceUpdate {Boolean} (default=false) wether the cached value should be ignored
* @return {String} reolved path/url
*/
qx.Proto.resolvePath = function(vPath, vForceUpdate)
{
var vUri = this._uris[vPath];
if (vUri == null) {
vUri = this._uris[vPath] = this._computePath(vPath);
}
// this.debug("URI: " + vPath + " => " + vUri);
return vUri;
}
/**
* Resolve a path name to a resource URI taking the defined aliases into account.
*
* If the first part of the path is a defined alias, the alias is resolved.
* Otherwhise the path is returned unmodified.
*
* @param vPath {String} path name
* @return {String} reolved path/url
*/
qx.Proto._computePath = function(vPath)
{
switch(vPath.charAt(0))
{
case "/":
case ".":
return vPath;
default:
if (
qx.lang.String.startsWith(vPath, qx.net.Protocol.URI_HTTP) ||
qx.lang.String.startsWith(vPath, qx.net.Protocol.URI_HTTPS) ||
qx.lang.String.startsWith(vPath, qx.net.Protocol.URI_FILE)
) {
return vPath;
}
var vAlias = vPath.substring(0, vPath.indexOf("/"));
var vResolved = this._aliases[vAlias];
if (vResolved != null) {
return vResolved + vPath.substring(vAlias.length);
}
return vPath;
}
}
/*
---------------------------------------------------------------------------
DISPOSER
---------------------------------------------------------------------------
*/
/**
* Disposer
*/
qx.Proto.dispose = function()
{
if (this.getDisposed()) {
return;
}
this._aliases = null;
this._uris = null;
return qx.core.Target.prototype.dispose.call(this);
}
/*
---------------------------------------------------------------------------
DEFER SINGLETON INSTANCE
---------------------------------------------------------------------------
*/
/**
* Singleton Instance Getter
*/
qx.Class.getInstance = qx.lang.Function.returnInstance;
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