/**
*
* @staticvar bool $done
*/
function form_init_date_js()
{
global $PAGE, $CFG;
static $done = false;
if (!$done) {
echo '<style type="text/css">';
echo '@import "' . $CFG->httpswwwroot . '/lib/yui/assets/skins/sam/calendar.css";';
echo '</style>';
require_js(array('yui_dom-event', 'yui_yahoo', 'yui_event', ajax_get_lib('yui_calendar'), ajax_get_lib('yui_container')));
require_js($CFG->wwwroot . '/curriculum/form/javascript-static.js');
echo '<script type="text/javascript">init_date_selectors("' . get_string('firstdayofweek') . '");</script>';
$done = true;
}
}
function test_ajax_get_lib()
{
global $CFG;
$olddebug = $CFG->debug;
$CFG->debug = DEBUG_DEVELOPER;
$this->assertEqual(ajax_get_lib('yui_yahoo'), $CFG->wwwroot . '/lib/yui/yahoo/yahoo.js');
$CFG->debug = DEBUG_MINIMAL;
$this->assertEqual(ajax_get_lib('yui_yahoo'), $CFG->wwwroot . '/lib/yui/yahoo/yahoo-min.js');
$CFG->debug = $olddebug;
$this->assertEqual(ajax_get_lib('lib/javascript-static.js'), $CFG->wwwroot . '/lib/javascript-static.js');
$this->assertEqual(ajax_get_lib($CFG->wwwroot . '/lib/javascript-static.js'), $CFG->wwwroot . '/lib/javascript-static.js');
$this->expectException();
ajax_get_lib('a_file_that_does_not_exist.js');
}
/**
* Used to include JavaScript libraries.
*
* When the $lib parameter is given, the function will add $lib to an
* internal list of libraries. When called without any parameters, it will
* return the html that is needed to load the JavaScript libraries in that
* list. Libraries that are included more than once will still only get loaded
* once, so this works like require_once() in PHP.
*
* @param $lib - string or array of strings
* string(s) should be the shortname for the library or the
* full path to the library file.
* @return string or false or nothing.
*/
function require_js($lib = '')
{
global $CFG;
static $loadlibs = array();
if (!ajaxenabled()) {
//return false;
}
if (!empty($lib)) {
// Add the lib to the list of libs to be loaded, if it isn't already
// in the list.
if (is_array($lib)) {
array_map('require_js', $lib);
} else {
$libpath = ajax_get_lib($lib);
if (array_search($libpath, $loadlibs) === false) {
$loadlibs[] = $libpath;
// If this is called after header, then we print it right away
// as otherwise nothing will ever happen!
if (defined('HEADER_PRINTED')) {
$realloadlibs = $loadlibs;
$loadlibs = array($libpath);
print require_js();
$loadlibs = $realloadlibs;
}
}
}
} else {
// Return the html needed to load the JavaScript files defined in
// our list of libs to be loaded.
$output = '';
foreach ($loadlibs as $loadlib) {
$output .= '<script type="text/javascript" ';
$output .= " src=\"{$loadlib}\"></script>\n";
if ($loadlib == $CFG->wwwroot . '/lib/yui/logger/logger-min.js') {
// Special case, we need the CSS too.
$output .= '<link type="text/css" rel="stylesheet" ';
$output .= " href=\"{$CFG->wwwroot}/lib/yui/logger/assets/logger.css\" />\n";
}
}
return $output;
}
}
/**
* Used to include JavaScript libraries.
*
* When the $lib parameter is given, the function will ensure that the
* named library or libraries is loaded onto the page - either in the
* HTML <head>, just after the header, or at an arbitrary later point in
* the page, depending on where this function is called.
*
* Libraries will not be included more than once, so this works like
* require_once in PHP.
*
* There are two special-case calls to this function from print_header which are
* internal to weblib and use the second $extracthtml parameter:
* $extracthtml = 1: this is used before printing the header.
* It returns the script tag code that should go inside the <head>.
* $extracthtml = 2: this is used after printing the header and handles any
* require_js calls that occurred within the header itself.
*
* @param mixed $lib The library or libraries to load (a string or array of strings)
* There are three way to specify the library:
* 1. a shorname like 'yui_yahoo'. The list of recognised values is in lib/ajax/ajaxlib.php
* 2. the path to the library relative to wwwroot, for example 'lib/javascript-static.js'
* 3. (legacy) a full URL like $CFG->wwwroot . '/lib/javascript-static.js'.
* @param int $extracthtml Private. For internal weblib use only.
* @return mixed No return value (except when doing the internal $extracthtml
* calls, when it returns html code).
*/
function require_js($lib, $extracthtml = 0)
{
global $CFG;
static $loadlibs = array();
static $state = REQUIREJS_BEFOREHEADER;
static $latecode = '';
if (!empty($lib)) {
// Add the lib to the list of libs to be loaded, if it isn't already
// in the list.
if (is_array($lib)) {
foreach ($lib as $singlelib) {
require_js($singlelib);
}
} else {
$libpath = ajax_get_lib($lib);
if (array_search($libpath, $loadlibs) === false) {
$loadlibs[] = $libpath;
// For state other than 0 we need to take action as well as just
// adding it to loadlibs
if ($state != REQUIREJS_BEFOREHEADER) {
// Get the script statement for this library
$scriptstatement = get_require_js_code(array($libpath));
if ($state == REQUIREJS_AFTERHEADER) {
// After the header, print it immediately
print $scriptstatement;
} else {
// Haven't finished the header yet. Add it after the
// header
$latecode .= $scriptstatement;
}
}
}
}
} else {
if ($extracthtml == 1) {
if ($state !== REQUIREJS_BEFOREHEADER) {
debugging('Incorrect state in require_js (expected BEFOREHEADER): be careful not to call with empty $lib (except in print_header)');
} else {
$state = REQUIREJS_INHEADER;
}
return get_require_js_code($loadlibs);
} else {
if ($extracthtml == 2) {
if ($state !== REQUIREJS_INHEADER) {
debugging('Incorrect state in require_js (expected INHEADER): be careful not to call with empty $lib (except in print_header)');
return '';
} else {
$state = REQUIREJS_AFTERHEADER;
return $latecode;
}
} else {
debugging('Unexpected value for $extracthtml');
}
}
}
}