70 lines
2.3 KiB
JavaScript
70 lines
2.3 KiB
JavaScript
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/**
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* Various helper functions
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*/
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/**
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* A PHP-style substr_replace
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*
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* Supports negative start and length and omitting length, but not
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* str and replace arrays.
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* See http://php.net/substr-replace for further documentation.
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*/
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function substr_replace(str, replace, start, length) {
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var a2, b1;
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a2 = (start < 0 ? str.length : 0) + start;
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if (typeof length === 'undefined') {
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length = str.length - a2;
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} else if (length < 0 && start < 0 && length <= start) {
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length = 0;
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}
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b1 = (length < 0 ? str.length : a2) + length;
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return str.substring(0, a2) + replace + str.substring(b1);
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}
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/**
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* Bind variables to a function call creating a closure
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*
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* Use this to circumvent variable scope problems when creating closures
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* inside a loop
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*
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* @author Adrian Lang <lang@cosmocode.de>
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* @link http://www.cosmocode.de/en/blog/gohr/2009-10/15-javascript-fixing-the-closure-scope-in-loops
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* @param functionref fnc - the function to be called
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* @param mixed - any arguments to be passed to the function
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* @returns functionref
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*/
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function bind(fnc/*, ... */) {
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var Aps = Array.prototype.slice,
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// Store passed arguments in this scope.
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// Since arguments is no Array nor has an own slice method,
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// we have to apply the slice method from the Array.prototype
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static_args = Aps.call(arguments, 1);
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// Return a function evaluating the passed function with the
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// given args and optional arguments passed on invocation.
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return function (/* ... */) {
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// Same here, but we use Array.prototype.slice solely for
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// converting arguments to an Array.
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return fnc.apply(this,
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static_args.concat(Aps.call(arguments, 0)));
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};
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}
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/**
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* Report an error from a JS file to the console
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*
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* @param e The error object
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* @param file The file in which the error occurred
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*/
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function logError(e, file) {
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if (window.console && console.error) {
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console.error('The error "%s: %s" occurred in file "%s". ' +
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'If this is in a plugin try updating or disabling the plugin, ' +
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'if this is in a template try updating the template or switching to the "dokuwiki" template.',
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e.name, e.message, file);
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if(e.stack) {
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console.error(e.stack);
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}
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}
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}
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