From 469c8601077642b1c130a9806e3ca3a8093f3f29 Mon Sep 17 00:00:00 2001 From: sbosse Date: Mon, 21 Jul 2025 23:25:10 +0200 Subject: [PATCH] Mon 21 Jul 22:43:21 CEST 2025 --- .../cordova-plugin-file/www/FileReader.js | 390 ++++++++++++++++++ 1 file changed, 390 insertions(+) create mode 100644 js/ui/cordova/plugins/cordova-plugin-file/www/FileReader.js diff --git a/js/ui/cordova/plugins/cordova-plugin-file/www/FileReader.js b/js/ui/cordova/plugins/cordova-plugin-file/www/FileReader.js new file mode 100644 index 0000000..5c523aa --- /dev/null +++ b/js/ui/cordova/plugins/cordova-plugin-file/www/FileReader.js @@ -0,0 +1,390 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * +*/ + +var exec = require('cordova/exec'), + modulemapper = require('cordova/modulemapper'), + utils = require('cordova/utils'), + File = require('./File'), + FileError = require('./FileError'), + ProgressEvent = require('./ProgressEvent'), + origFileReader = modulemapper.getOriginalSymbol(window, 'FileReader'); + +/** + * This class reads the mobile device file system. + * + * For Android: + * The root directory is the root of the file system. + * To read from the SD card, the file name is "sdcard/my_file.txt" + * @constructor + */ +var FileReader = function() { + this._readyState = 0; + this._error = null; + this._result = null; + this._localURL = ''; + this._realReader = origFileReader ? new origFileReader() : {}; +}; + +// States +FileReader.EMPTY = 0; +FileReader.LOADING = 1; +FileReader.DONE = 2; + +utils.defineGetter(FileReader.prototype, 'readyState', function() { + return this._localURL ? this._readyState : this._realReader.readyState; +}); + +utils.defineGetter(FileReader.prototype, 'error', function() { + return this._localURL ? this._error: this._realReader.error; +}); + +utils.defineGetter(FileReader.prototype, 'result', function() { + return this._localURL ? this._result: this._realReader.result; +}); + +function defineEvent(eventName) { + utils.defineGetterSetter(FileReader.prototype, eventName, function() { + return this._realReader[eventName] || null; + }, function(value) { + this._realReader[eventName] = value; + }); +} +defineEvent('onloadstart'); // When the read starts. +defineEvent('onprogress'); // While reading (and decoding) file or fileBlob data, and reporting partial file data (progress.loaded/progress.total) +defineEvent('onload'); // When the read has successfully completed. +defineEvent('onerror'); // When the read has failed (see errors). +defineEvent('onloadend'); // When the request has completed (either in success or failure). +defineEvent('onabort'); // When the read has been aborted. For instance, by invoking the abort() method. + +function initRead(reader, file) { + // Already loading something + if (reader.readyState == FileReader.LOADING) { + throw new FileError(FileError.INVALID_STATE_ERR); + } + + reader._result = null; + reader._error = null; + reader._readyState = FileReader.LOADING; + + if (typeof file.localURL == 'string') { + reader._localURL = file.localURL; + } else { + reader._localURL = ''; + return true; + } + + reader.onloadstart && reader.onloadstart(new ProgressEvent("loadstart", {target:reader})); +} + +/** + * Abort reading file. + */ +FileReader.prototype.abort = function() { + if (origFileReader && !this._localURL) { + return this._realReader.abort(); + } + this._result = null; + + if (this._readyState == FileReader.DONE || this._readyState == FileReader.EMPTY) { + return; + } + + this._readyState = FileReader.DONE; + + // If abort callback + if (typeof this.onabort === 'function') { + this.onabort(new ProgressEvent('abort', {target:this})); + } + // If load end callback + if (typeof this.onloadend === 'function') { + this.onloadend(new ProgressEvent('loadend', {target:this})); + } +}; + +/** + * Read text file. + * + * @param file {File} File object containing file properties + * @param encoding [Optional] (see http://www.iana.org/assignments/character-sets) + */ +FileReader.prototype.readAsText = function(file, encoding) { + if (initRead(this, file)) { + return this._realReader.readAsText(file, encoding); + } + + // Default encoding is UTF-8 + var enc = encoding ? encoding : "UTF-8"; + var me = this; + var execArgs = [this._localURL, enc, file.start, file.end]; + + // Read file + exec( + // Success callback + function(r) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + // Save result + me._result = r; + + // If onload callback + if (typeof me.onload === "function") { + me.onload(new ProgressEvent("load", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, + // Error callback + function(e) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + // null result + me._result = null; + + // Save error + me._error = new FileError(e); + + // If onerror callback + if (typeof me.onerror === "function") { + me.onerror(new ProgressEvent("error", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, "File", "readAsText", execArgs); +}; + + +/** + * Read file and return data as a base64 encoded data url. + * A data url is of the form: + * data:[][;base64], + * + * @param file {File} File object containing file properties + */ +FileReader.prototype.readAsDataURL = function(file) { + if (initRead(this, file)) { + return this._realReader.readAsDataURL(file); + } + + var me = this; + var execArgs = [this._localURL, file.start, file.end]; + + // Read file + exec( + // Success callback + function(r) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + // Save result + me._result = r; + + // If onload callback + if (typeof me.onload === "function") { + me.onload(new ProgressEvent("load", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, + // Error callback + function(e) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + me._result = null; + + // Save error + me._error = new FileError(e); + + // If onerror callback + if (typeof me.onerror === "function") { + me.onerror(new ProgressEvent("error", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, "File", "readAsDataURL", execArgs); +}; + +/** + * Read file and return data as a binary data. + * + * @param file {File} File object containing file properties + */ +FileReader.prototype.readAsBinaryString = function(file) { + if (initRead(this, file)) { + return this._realReader.readAsBinaryString(file); + } + + var me = this; + var execArgs = [this._localURL, file.start, file.end]; + + // Read file + exec( + // Success callback + function(r) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + me._result = r; + + // If onload callback + if (typeof me.onload === "function") { + me.onload(new ProgressEvent("load", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, + // Error callback + function(e) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + me._result = null; + + // Save error + me._error = new FileError(e); + + // If onerror callback + if (typeof me.onerror === "function") { + me.onerror(new ProgressEvent("error", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, "File", "readAsBinaryString", execArgs); +}; + +/** + * Read file and return data as a binary data. + * + * @param file {File} File object containing file properties + */ +FileReader.prototype.readAsArrayBuffer = function(file) { + if (initRead(this, file)) { + return this._realReader.readAsArrayBuffer(file); + } + + var me = this; + var execArgs = [this._localURL, file.start, file.end]; + + // Read file + exec( + // Success callback + function(r) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + if (r instanceof Array) { + r = new Uint8Array(r).buffer; + } + me._result = r; + + // If onload callback + if (typeof me.onload === "function") { + me.onload(new ProgressEvent("load", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, + // Error callback + function(e) { + // If DONE (cancelled), then don't do anything + if (me._readyState === FileReader.DONE) { + return; + } + + // DONE state + me._readyState = FileReader.DONE; + + me._result = null; + + // Save error + me._error = new FileError(e); + + // If onerror callback + if (typeof me.onerror === "function") { + me.onerror(new ProgressEvent("error", {target:me})); + } + + // If onloadend callback + if (typeof me.onloadend === "function") { + me.onloadend(new ProgressEvent("loadend", {target:me})); + } + }, "File", "readAsArrayBuffer", execArgs); +}; + +module.exports = FileReader;