tauri-rm/patch.js at main · CheYoki/tauri-rm · GitHub

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(function() {
    let lastLoggedUrl = null;
    function decodeUrlIfNeeded(url) {
        if (typeof url !== 'string' || !url.includes('%')) return url;
        try {
            const decodedUrl = decodeURIComponent(url);
            if (decodedUrl !== url && url !== lastLoggedUrl) lastLoggedUrl = url;
            return decodedUrl;
        } catch (e) { return url; }
    }
    function patchXMLHttpRequest() {
        if (window.XMLHttpRequest && !window.XMLHttpRequest._patchedByUrlV5) {
            const orig = XMLHttpRequest.prototype.open;
            XMLHttpRequest.prototype.open = function(m, u) {
                const args = Array.prototype.slice.call(arguments, 2);
                return orig.apply(this, [m, decodeUrlIfNeeded(u)].concat(args));
            };
            window.XMLHttpRequest._patchedByUrlV5 = true;
            return true;
        }
        return window.XMLHttpRequest && window.XMLHttpRequest._patchedByUrlV5;
    }
    function patchImageSrc() {
        if (window.Image && !window.Image.prototype._patchedByUrlV5) {
            const desc = Object.getOwnPropertyDescriptor(Image.prototype, 'src');
            if (!desc || !(desc.set || desc.configurable)) return false;
            Object.defineProperty(Image.prototype, 'src', {
                configurable: true,
                enumerable: desc.enumerable !== undefined ? desc.enumerable : true,
                get: desc.get || function() { return this.getAttribute('src') || ''; },
                set: function(u) {
                    const url = decodeUrlIfNeeded(u);
                    if (desc.set) { try { desc.set.call(this, url); } catch (e) { try { this.setAttribute('src', url); } catch (e2) {} } }
                    else { try { this.setAttribute('src', url); } catch (e) {} }
                }
            });
            window.Image.prototype._patchedByUrlV5 = true;
            return true;
        }
        return window.Image && window.Image.prototype._patchedByUrlV5;
    }

    function patchBitmapDrawTextAlign() {
        if (!window.Bitmap || !Bitmap.prototype.drawText) return false;
        if (Bitmap.prototype._patchedByCanvasTextAlignFix) return true;
        const originalDrawText = Bitmap.prototype.drawText;
        Bitmap.prototype.drawText = function(text, x, y, maxWidth, lineHeight, align) {
            if (align !== 'left' && align !== 'center' && align !== 'right') align = 'left';
            return originalDrawText.call(this, text, x, y, maxWidth, lineHeight, align);
        };
        Bitmap.prototype._patchedByCanvasTextAlignFix = true;
        return true;
    }

    let webAudioPatched = false;
    const patchWebAudioMethods = function() {
        if (webAudioPatched || typeof WebAudio === 'undefined' || !WebAudio.prototype || WebAudio.prototype._patchedByAudioCacheV2_1) return webAudioPatched;
        if (!WebAudio._originalInitialize) WebAudio._originalInitialize = WebAudio.prototype.initialize;
        if (!WebAudio._original_load) WebAudio._original_load = WebAudio.prototype._load;
        if (!WebAudio._original_onXhrLoad) WebAudio._original_onXhrLoad = WebAudio.prototype._onXhrLoad;
        if (!WebAudio._original_onError) WebAudio._original_onError = WebAudio.prototype._onError || function() { this._hasError = true; };
        if (!WebAudio._originalClear) WebAudio._originalClear = WebAudio.prototype.clear;
        if (!WebAudio._original_readLoopComments) WebAudio._original_readLoopComments = WebAudio.prototype._readLoopComments;
        if (typeof WebAudio._audioBuffers === 'undefined') WebAudio._audioBuffers = {};
        if (typeof WebAudio._loadingUrls === 'undefined') WebAudio._loadingUrls = {};
        WebAudio.prototype._readLoopCommentsFromCache = function(c) {
            this._loopStart = c.loopStart || 0;
            this._loopLength = c.loopLength || this._totalTime || 0;
            this._sampleRate = c.sampleRate || 0;
        };
        WebAudio.prototype.initialize = function(url) {
            WebAudio._originalClear.call(this);
            this._url = url;
            if (!WebAudio._initialized) WebAudio.initialize();
            if (!WebAudio._context) { this._hasError = true; this._loadingState = 'error'; setTimeout(this._callLoadListeners.bind(this), 0); return; }
            const c = WebAudio._audioBuffers[url];
            if (c && c.buffer) {
                this._buffer = c.buffer; this._totalTime = this._buffer.duration;
                this._readLoopCommentsFromCache(c); this._loadingState = 'loaded';
                setTimeout(this._onLoad.bind(this), 0); return;
            }
            const loadingPromise = WebAudio._loadingUrls[url];
            if (loadingPromise) {
                this._isLoading = true; this._loadingState = 'pending';
                loadingPromise.then((d) => {
                    if (d && d.buffer) {
                        this._buffer = d.buffer; this._totalTime = this._buffer.duration;
                        this._readLoopCommentsFromCache(d); this._loadingState = 'loaded'; this._onLoad();
                    } else { this._hasError = true; this._loadingState = 'error'; WebAudio._original_onError.call(this); }
                    this._isLoading = false;
                }).catch(() => {
                    this._hasError = true; this._loadingState = 'error'; WebAudio._original_onError.call(this);
                    this._isLoading = false;
                });
                return;
            }
            this._loadingState = 'loading';
            WebAudio._loadingUrls[url] = new Promise((resolve, reject) => { this._loadResolver = resolve; this._loadRejecter = reject; });
            if (!WebAudio._standAlone) this._loader = ResourceHandler.createLoader(url, this._load.bind(this, url), () => {
                this._hasError = true;
                if (WebAudio._loadingUrls[this._url]) { WebAudio._loadingUrls[this._url].reject(new Error(`ResourceHandler failed: ${this._url}`)); delete WebAudio._loadingUrls[this._url]; }
                this._loadingState = 'error'; WebAudio._original_onError.call(this);
            });
            this._load(url);
        };
        WebAudio.prototype._load = function(url) {
            if (WebAudio._context) {
                const xhr = new XMLHttpRequest();
                let requestUrl = url;
                if (Decrypter.hasEncryptedAudio) requestUrl = Decrypter.extToEncryptExt(url);
                xhr.open('GET', requestUrl); xhr.responseType = 'arraybuffer';
                xhr.onload = () => { if (xhr.status < 400) this._onXhrLoad(xhr); else this._onError(); };
                xhr.onerror = this._loader || this._onError.bind(this);
                xhr.send();
            } else { this._onError(); }
        };
        WebAudio.prototype._onXhrLoad = function(xhr) {
            let array = xhr.response;
            if (Decrypter.hasEncryptedAudio) array = Decrypter.decryptArrayBuffer(array);
            WebAudio._original_readLoopComments.call(this, new Uint8Array(array));
            const loopStart = this._loopStart, loopLength = this._loopLength, sampleRate = this._sampleRate;
            WebAudio._context.decodeAudioData(array, (buffer) => {
                this._buffer = buffer; this._totalTime = buffer.duration;
                const cacheData = { buffer, loopStart, loopLength, sampleRate };
                WebAudio._audioBuffers[this._url] = cacheData;
                if (this._loadResolver) this._loadResolver(cacheData);
                if (WebAudio._loadingUrls[this._url]) delete WebAudio._loadingUrls[this._url];
                if (loopLength > 0 && sampleRate > 0) {
                    this._loopStart = loopStart / sampleRate; this._loopLength = loopLength / sampleRate;
                } else { this._loopStart = 0; this._loopLength = this._totalTime; }
                this._loadingState = 'loaded'; this._onLoad();
            }, () => {
                if (this._loadRejecter) this._loadRejecter(new Error(`decodeAudioData failed for ${this._url}`));
                if (WebAudio._loadingUrls[this._url]) delete WebAudio._loadingUrls[this._url];
                if (this._loader) this._loader(); else this._onError();
            });
        };
        WebAudio.prototype._onError = function() {
            this._hasError = true; this._loadingState = 'error';
            if (this._loadRejecter) this._loadRejecter(new Error(`Failed to load audio: ${this._url}`));
            if (WebAudio._loadingUrls[this._url]) delete WebAudio._loadingUrls[this._url];
            WebAudio._original_onError.call(this);
            this._callLoadListeners();
        };
        WebAudio.prototype._patchedByAudioCacheV2_1 = true;
        webAudioPatched = true;
        return true;
    };

    let patchRAFId = null;
    const attemptPatches = () => {
        const xhrPatched = patchXMLHttpRequest();
        const imgPatched = patchImageSrc();
        const audioPatched = patchWebAudioMethods();
        const drawTextPatched = patchBitmapDrawTextAlign();
        if (xhrPatched && imgPatched && audioPatched && drawTextPatched) {
            if (patchRAFId) { cancelAnimationFrame(patchRAFId); patchRAFId = null; }
        } else patchRAFId = requestAnimationFrame(attemptPatches);
    };
    patchRAFId = requestAnimationFrame(attemptPatches);
})();