42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
/**
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* @file addon-hooks.js
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* @brief Provide a way for add-ons to register a JavaScript hook
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*/
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var addon_hooks = {};
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/**
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* @brief Register a JavaScript hook to be called from other Javascript files
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* @pre the .js file from which the hook will be called is included in the document response
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* @param type which type of hook i.e. where should it be called along with other hooks of the same type
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* @param hookfnstr name of the JavaScript function name that needs to be called
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*/
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function Addon_registerHook(type, hookfnstr)
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{
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if (!addon_hooks.hasOwnProperty(type)) {
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addon_hooks[type] = [];
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}
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addon_hooks[type].push(hookfnstr);
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}
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/**
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* @brief Call all registered hooks of a certain type, i.e. at the same point of the JavaScript code execution
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* @param typeOfHook string indicating which type of hooks to be called among the registered hooks
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*/
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function callAddonHooks(typeOfHook)
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{
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if (typeof addon_hooks !== 'undefined') {
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var myTypeOfHooks = addon_hooks[typeOfHook];
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if (typeof myTypeOfHooks !== 'undefined') {
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for (addon_hook_idx = 0; addon_hook_idx < myTypeOfHooks.length; addon_hook_idx++) {
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var hookfnstr = myTypeOfHooks[addon_hook_idx];
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var hookfn = window[hookfnstr];
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if (typeof hookfn === "function") {
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hookfn();
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}
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}
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}
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}
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}
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