egroupware_official/api/js/jsapi/egw_files.js

254 lines
6.7 KiB
JavaScript

/**
* EGroupware clientside API object
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage api
* @link http://www.egroupware.org
* @author Andreas Stöckel (as AT stylite.de)
* @author Ralf Becker <RalfBecker@outdoor-training.de>
* @version $Id$
*/
/*egw:uses
egw_core;
egw_ready;
egw_debug;
*/
/**
* @augments Class
* @param {string} _app application name object is instanciated for
* @param {object} _wnd window object is instanciated for
*/
egw.extend('files', egw.MODULE_WND_LOCAL, function(_app, _wnd)
{
"use strict";
var egw = this;
/**
* Remove optional timestamp attached as query parameter, eg. /path/name.js?12345678[&other=val]
*
* Examples:
* /path/file.js --> /path/file.js
* /path/file.js?123456 --> /path/file.js
* /path/file.php?123456&param=value --> /path/file.php?param=value
* /path/file.php?param=value&123456 --> /path/file.php?param=value
*
* @param _src url
* @return url with timestamp stripped off
*/
function removeTS(_src)
{
return _src.replace(/[?&][0-9]+&?/, '?').replace(/\?$/, '');
}
/**
* RegExp to extract string with comma-separated files from a bundle-url
*
* @type RegExp
*/
var bundle2files_regexp = /phpgwapi\/inc\/min\/\?b=[^&]+&f=([^&]+)/;
/**
* Regexp to detect and remove .min.js extension
*
* @type RegExp
*/
var min_js_regexp = /\.min\.js$/;
/**
* Return array of files-sources from bundle(s) incl. bundle-src itself
*
* @param {string|Array} _srcs all url's have to be egw releativ!
* @returns {Array}
*/
function files_from_bundles(_srcs)
{
var files = [];
if (typeof _srcs == 'string') _srcs = [_srcs];
for(var n=0; n < _srcs.length; ++n)
{
var file = _srcs[n];
files.push(file.replace(min_js_regexp, '.js'));
var contains = file.match(bundle2files_regexp);
if (contains && contains.length > 1)
{
var bundle = contains[1].split(',');
for(var i=0; i < bundle.length; ++i)
{
files.push(bundle[i].replace(min_js_regexp, '.js'));
}
}
}
return files;
}
/**
* Strip of egw_url from given urls (if containing it)
*
* @param {array} _urls absolute urls
* @returns {array} relativ urls
*/
function strip_egw_url(_urls)
{
var egw_url = egw.webserverUrl;
if (egw_url.charAt(egw_url.length-1) != '/') egw_url += '/';
for(var i=0; i < _urls.length; ++i)
{
var file = _urls[i];
// check if egw_url is only path and urls contains full url incl. protocol
// --> prefix it with our protocol and host, as eg. splitting by just '/' will fail!
var need_full_url = egw_url[0] == '/' && file.substr(0,4) == 'http' ? window.location.protocol+'//'+window.location.host : '';
var parts = file.split(need_full_url+egw_url);
if (parts.length > 1)
{
// discard protocol and host
parts.shift();
_urls[i] = parts.join(need_full_url+egw_url);
}
}
return _urls;
}
/**
* Array which contains all currently bound in javascript and css files.
*/
var files = [];
// add already included scripts
var tags = jQuery('script', _wnd.document);
for(var i=0; i < tags.length; ++i)
{
files.push(removeTS(tags[i].src));
}
// add already included css
tags = jQuery('link[type="text/css"]', _wnd.document);
for(var i=0; i < tags.length; ++i)
{
files.push(removeTS(tags[i].href));
}
// make urls egw-relative
files = strip_egw_url(files);
// resolve bundles and replace .min.js with .js
files = files_from_bundles(files);
return {
/**
* Load and execute javascript file(s) in order
*
* @memberOf egw
* @param {string|array} _jsFiles (array of) urls to include
* @param {function} _callback called after JS files are loaded and executed
* @param {object} _context
* @param {string} _prefix prefix for _jsFiles
*/
includeJS: function(_jsFiles, _callback, _context, _prefix)
{
// Also allow including a single javascript file
if (typeof _jsFiles === 'string')
{
_jsFiles = [_jsFiles];
}
// LABjs uses prefix only if url is not absolute, so removing leading / if necessary and add it to prefix
if (_prefix)
{
for(var i=0; i < _jsFiles.length; ++i)
{
if (_jsFiles[i].charAt(0) == '/') _jsFiles[i] = _jsFiles[i].substr(1);
}
}
// as all our included checks use egw relative url strip off egw-url and use it as prefix
else
{
_jsFiles = strip_egw_url(_jsFiles);
_prefix = egw.webserverUrl;
}
if (_prefix.charAt(_prefix.length-1) != '/')
{
_prefix += '/';
}
// search and NOT load files already included as part of a bundle
for(var i=0; i < _jsFiles.length; ++i)
{
var file = _jsFiles[i];
if (this.included(file, true)) // check if included and marks as such if not
{
_jsFiles.splice(i, 1);
i--; // as index will be incr by for!
}
}
// check if all files already included or sheduled to be included --> call callback via egw_LAB.wait
if (!_jsFiles.length)
{
egw_LAB.wait(function(){
_callback.call(_context);
});
return;
}
// setting AlwaysPreserverOrder: true, 'til we have some other means of ensuring dependency resolution
(egw_LAB || $LAB.setOptions({AlwaysPreserveOrder:true,BasePath:_prefix})).script(_jsFiles).wait(function(){
_callback.call(_context);
});
},
/**
* Check if file is already included and optional mark it as included if not yet included
*
* Check does NOT differenciate between file.min.js and file.js.
* Only .js get's recored in files for further checking, if _add_if_not set.
*
* @param {string} _file
* @param {boolean} _add_if_not if true mark file as included
* @return boolean true if file already included, false if not
*/
included: function(_file, _add_if_not)
{
var file = removeTS(_file).replace(min_js_regexp, '.js');
var not_inc = files.indexOf(file) == -1;
if (not_inc && _add_if_not)
{
files = files.concat(files_from_bundles(file));
}
return !not_inc;
},
/**
* Include a CSS file
*
* @param {string|array} _cssFiles full url of file to include
*/
includeCSS: function(_cssFiles)
{
if (typeof _cssFiles == 'string') _cssFiles = [_cssFiles];
_cssFiles = strip_egw_url(_cssFiles);
for(var n=0; n < _cssFiles.length; ++n)
{
var file = _cssFiles[n];
if (!this.included(file, true)) // check if included and marks as such if not
{
// Create the node which is used to include the css file
var cssnode = _wnd.document.createElement('link');
cssnode.type = "text/css";
cssnode.rel = "stylesheet";
cssnode.href = egw.webserverUrl+'/'+file;
// Get the head node and append the newly created "link" nod to it
var head = _wnd.document.getElementsByTagName('head')[0];
head.appendChild(cssnode);
}
}
}
};
});