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Bitsy
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| (function(bitsy) { | |
| "use strict"; | |
| bitsy = bitsy && bitsy.hasOwnProperty("default") ? bitsy["default"] : bitsy; | |
| function inject(searchRegex, replaceString) { | |
| // find the relevant script tag | |
| var scriptTags = document.getElementsByTagName("script"); | |
| var scriptTag; | |
| var code; | |
| for (var i = 0; i < scriptTags.length; ++i) { | |
| scriptTag = scriptTags[i]; | |
| var matchesSearch = scriptTag.textContent.search(searchRegex) !== -1; | |
| var isCurrentScript = scriptTag === document.currentScript; | |
| if (matchesSearch && !isCurrentScript) { | |
| code = scriptTag.textContent; | |
| break; | |
| } | |
| } | |
| // error-handling | |
| if (!code) { | |
| throw "Couldn't find \"" + searchRegex + '" in script tags'; | |
| } | |
| // modify the content | |
| code = code.replace(searchRegex, replaceString); | |
| // replace the old script tag with a new one using our modified code | |
| var newScriptTag = document.createElement("script"); | |
| newScriptTag.textContent = code; | |
| scriptTag.insertAdjacentElement("afterend", newScriptTag); | |
| scriptTag.remove(); | |
| } | |
| function unique(array) { | |
| return array.filter(function(item, idx) { | |
| return array.indexOf(item) === idx; | |
| }); | |
| } | |
| function before(targetFuncName, beforeFn) { | |
| var kitsy = kitsyInit(); | |
| kitsy.queuedBeforeScripts[targetFuncName] = kitsy.queuedBeforeScripts[targetFuncName] || []; | |
| kitsy.queuedBeforeScripts[targetFuncName].push(beforeFn); | |
| } | |
| // Ex: after('load_game', function run() { alert('Loaded!'); }); | |
| function after(targetFuncName, afterFn) { | |
| var kitsy = kitsyInit(); | |
| kitsy.queuedAfterScripts[targetFuncName] = kitsy.queuedAfterScripts[targetFuncName] || []; | |
| kitsy.queuedAfterScripts[targetFuncName].push(afterFn); | |
| } | |
| function kitsyInit() { | |
| // return already-initialized kitsy | |
| if (bitsy.kitsy) { | |
| return bitsy.kitsy; | |
| } | |
| // Initialize kitsy | |
| bitsy.kitsy = { | |
| queuedInjectScripts: [], | |
| queuedBeforeScripts: {}, | |
| queuedAfterScripts: {} | |
| }; | |
| var oldStartFunc = bitsy.startExportedGame; | |
| bitsy.startExportedGame = function doAllInjections() { | |
| // Only do this once. | |
| bitsy.startExportedGame = oldStartFunc; | |
| // Rewrite scripts and hook everything up. | |
| doInjects(); | |
| applyAllHooks(); | |
| // Start the game | |
| bitsy.startExportedGame.apply(this, arguments); | |
| }; | |
| return bitsy.kitsy; | |
| } | |
| function doInjects() { | |
| bitsy.kitsy.queuedInjectScripts.forEach(function(injectScript) { | |
| inject(injectScript.searchRegex, injectScript.replaceString); | |
| }); | |
| _reinitEngine(); | |
| } | |
| function applyAllHooks() { | |
| var allHooks = unique(Object.keys(bitsy.kitsy.queuedBeforeScripts).concat(Object.keys(bitsy.kitsy.queuedAfterScripts))); | |
| allHooks.forEach(applyHook); | |
| } | |
| function applyHook(functionName) { | |
| var functionNameSegments = functionName.split("."); | |
| var obj = bitsy; | |
| while (functionNameSegments.length > 1) { | |
| obj = obj[functionNameSegments.shift()]; | |
| } | |
| var lastSegment = functionNameSegments[0]; | |
| var superFn = obj[lastSegment]; | |
| var superFnLength = superFn ? superFn.length : 0; | |
| var functions = []; | |
| // start with befores | |
| functions = functions.concat(bitsy.kitsy.queuedBeforeScripts[functionName] || []); | |
| // then original | |
| if (superFn) { | |
| functions.push(superFn); | |
| } | |
| // then afters | |
| functions = functions.concat(bitsy.kitsy.queuedAfterScripts[functionName] || []); | |
| // overwrite original with one which will call each in order | |
| obj[lastSegment] = function() { | |
| var returnVal; | |
| var args = [].slice.call(arguments); | |
| var i = 0; | |
| function runBefore() { | |
| // All outta functions? Finish | |
| if (i === functions.length) { | |
| return returnVal; | |
| } | |
| // Update args if provided. | |
| if (arguments.length > 0) { | |
| args = [].slice.call(arguments); | |
| } | |
| if (functions[i].length > superFnLength) { | |
| // Assume funcs that accept more args than the original are | |
| // async and accept a callback as an additional argument. | |
| return functions[i++].apply(this, args.concat(runBefore.bind(this))); | |
| } else { | |
| // run synchronously | |
| returnVal = functions[i++].apply(this, args); | |
| if (returnVal && returnVal.length) { | |
| args = returnVal; | |
| } | |
| return runBefore.apply(this, args); | |
| } | |
| } | |
| return runBefore.apply(this, arguments); | |
| }; | |
| } | |
| function _reinitEngine() { | |
| // recreate the script and dialog objects so that they'll be | |
| // referencing the code with injections instead of the original | |
| bitsy.scriptModule = new bitsy.Script(); | |
| bitsy.scriptInterpreter = bitsy.scriptModule.CreateInterpreter(); | |
| bitsy.dialogModule = new bitsy.Dialog(); | |
| bitsy.dialogRenderer = bitsy.dialogModule.CreateRenderer(); | |
| bitsy.dialogBuffer = bitsy.dialogModule.CreateBuffer(); | |
| } | |
| window.foo = { | |
| after: after | |
| }; | |
| })(window); |
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