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83623b313c
This part changes the signatures for various finalization API to take not JSContext* but rather either JSFreeOp structure or its library-private counterpart FreeOp. These structures wrap parameters that are passed to the finalizers removing most of explicit dependencies on JSContext in the finalization code.
370 lines
9.6 KiB
C++
370 lines
9.6 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Web Workers.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* William Chen <wchen@mozilla.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "FileReaderSync.h"
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#include "nsIDOMFile.h"
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#include "jsapi.h"
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#include "jsatom.h"
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#include "jsfriendapi.h"
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#include "nsJSUtils.h"
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#include "Exceptions.h"
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#include "File.h"
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#include "FileReaderSyncPrivate.h"
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#include "WorkerInlines.h"
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#define FUNCTION_FLAGS \
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JSPROP_ENUMERATE
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USING_WORKERS_NAMESPACE
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using mozilla::dom::workers::exceptions::ThrowFileExceptionForCode;
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namespace {
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inline bool
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EnsureSucceededOrThrow(JSContext* aCx, nsresult rv)
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{
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if (NS_SUCCEEDED(rv)) {
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return true;
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}
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int code = rv == NS_ERROR_FILE_NOT_FOUND ?
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FILE_NOT_FOUND_ERR :
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FILE_NOT_READABLE_ERR;
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ThrowFileExceptionForCode(aCx, code);
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return false;
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}
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inline nsIDOMBlob*
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GetDOMBlobFromJSObject(JSContext* aCx, JSObject* aObj) {
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// aObj can be null as JS_ConvertArguments("o") successfully converts JS
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// null to a null pointer to JSObject
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if (aObj) {
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nsIDOMBlob* blob = file::GetDOMBlobFromJSObject(aObj);
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if (blob) {
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return blob;
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}
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}
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JS_ReportErrorNumber(aCx, js_GetErrorMessage, NULL, JSMSG_UNEXPECTED_TYPE,
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aObj ? JS_GetClass(aObj)->name : "Object", "not a Blob.");
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return NULL;
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}
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class FileReaderSync
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{
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// FileReaderSync should not be instantiated.
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FileReaderSync();
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~FileReaderSync();
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static JSClass sClass;
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static JSFunctionSpec sFunctions[];
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public:
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static JSObject*
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InitClass(JSContext* aCx, JSObject* aObj)
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{
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return JS_InitClass(aCx, aObj, NULL, &sClass, Construct, 0,
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NULL, sFunctions, NULL, NULL);
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}
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static FileReaderSyncPrivate*
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GetPrivate(JSObject* aObj)
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{
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if (aObj) {
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JSClass* classPtr = JS_GetClass(aObj);
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if (classPtr == &sClass) {
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FileReaderSyncPrivate* fileReader =
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GetJSPrivateSafeish<FileReaderSyncPrivate>(aObj);
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return fileReader;
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}
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}
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return NULL;
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}
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private:
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static FileReaderSyncPrivate*
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GetInstancePrivate(JSContext* aCx, JSObject* aObj, const char* aFunctionName)
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{
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FileReaderSyncPrivate* fileReader = GetPrivate(aObj);
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if (fileReader) {
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return fileReader;
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}
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JS_ReportErrorNumber(aCx, js_GetErrorMessage, NULL,
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JSMSG_INCOMPATIBLE_PROTO, sClass.name, aFunctionName,
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JS_GetClass(aObj)->name);
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return NULL;
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}
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static JSBool
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Construct(JSContext* aCx, unsigned aArgc, jsval* aVp)
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{
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JSObject* obj = JS_NewObject(aCx, &sClass, NULL, NULL);
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if (!obj) {
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return false;
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}
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FileReaderSyncPrivate* fileReader = new FileReaderSyncPrivate();
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NS_ADDREF(fileReader);
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SetJSPrivateSafeish(obj, fileReader);
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JS_SET_RVAL(aCx, aVp, OBJECT_TO_JSVAL(obj));
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return true;
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}
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static void
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Finalize(JSFreeOp* aFop, JSObject* aObj)
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{
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JS_ASSERT(JS_GetClass(aObj) == &sClass);
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FileReaderSyncPrivate* fileReader =
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GetJSPrivateSafeish<FileReaderSyncPrivate>(aObj);
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NS_IF_RELEASE(fileReader);
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}
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static JSBool
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ReadAsArrayBuffer(JSContext* aCx, unsigned aArgc, jsval* aVp)
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{
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JSObject* obj = JS_THIS_OBJECT(aCx, aVp);
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if (!obj) {
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return false;
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}
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FileReaderSyncPrivate* fileReader =
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GetInstancePrivate(aCx, obj, "readAsArrayBuffer");
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if (!fileReader) {
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return false;
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}
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JSObject* jsBlob;
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if (!JS_ConvertArguments(aCx, aArgc, JS_ARGV(aCx, aVp), "o", &jsBlob)) {
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return false;
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}
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nsIDOMBlob* blob = GetDOMBlobFromJSObject(aCx, jsBlob);
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if (!blob) {
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return false;
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}
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PRUint64 blobSize;
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nsresult rv = blob->GetSize(&blobSize);
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if (!EnsureSucceededOrThrow(aCx, rv)) {
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return false;
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}
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JSObject* jsArrayBuffer = JS_NewArrayBuffer(aCx, blobSize);
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if (!jsArrayBuffer) {
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return false;
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}
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uint32_t bufferLength = JS_GetArrayBufferByteLength(jsArrayBuffer, aCx);
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uint8_t* arrayBuffer = JS_GetArrayBufferData(jsArrayBuffer, aCx);
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rv = fileReader->ReadAsArrayBuffer(blob, bufferLength, arrayBuffer);
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if (!EnsureSucceededOrThrow(aCx, rv)) {
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return false;
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}
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JS_SET_RVAL(aCx, aVp, OBJECT_TO_JSVAL(jsArrayBuffer));
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return true;
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}
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static JSBool
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ReadAsDataURL(JSContext* aCx, unsigned aArgc, jsval* aVp)
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{
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JSObject* obj = JS_THIS_OBJECT(aCx, aVp);
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if (!obj) {
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return false;
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}
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FileReaderSyncPrivate* fileReader =
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GetInstancePrivate(aCx, obj, "readAsDataURL");
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if (!fileReader) {
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return false;
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}
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JSObject* jsBlob;
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if (!JS_ConvertArguments(aCx, aArgc, JS_ARGV(aCx, aVp), "o", &jsBlob)) {
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return false;
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}
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nsIDOMBlob* blob = GetDOMBlobFromJSObject(aCx, jsBlob);
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if (!blob) {
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return false;
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}
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nsString blobText;
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nsresult rv = fileReader->ReadAsDataURL(blob, blobText);
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if (!EnsureSucceededOrThrow(aCx, rv)) {
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return false;
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}
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JSString* jsBlobText = JS_NewUCStringCopyN(aCx, blobText.get(),
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blobText.Length());
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if (!jsBlobText) {
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return false;
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}
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JS_SET_RVAL(aCx, aVp, STRING_TO_JSVAL(jsBlobText));
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return true;
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}
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static JSBool
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ReadAsBinaryString(JSContext* aCx, unsigned aArgc, jsval* aVp)
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{
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JSObject* obj = JS_THIS_OBJECT(aCx, aVp);
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if (!obj) {
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return false;
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}
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FileReaderSyncPrivate* fileReader =
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GetInstancePrivate(aCx, obj, "readAsBinaryString");
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if (!fileReader) {
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return false;
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}
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JSObject* jsBlob;
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if (!JS_ConvertArguments(aCx, aArgc, JS_ARGV(aCx, aVp), "o", &jsBlob)) {
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return false;
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}
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nsIDOMBlob* blob = GetDOMBlobFromJSObject(aCx, jsBlob);
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if (!blob) {
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return false;
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}
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nsString blobText;
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nsresult rv = fileReader->ReadAsBinaryString(blob, blobText);
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if (!EnsureSucceededOrThrow(aCx, rv)) {
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return false;
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}
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JSString* jsBlobText = JS_NewUCStringCopyN(aCx, blobText.get(),
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blobText.Length());
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if (!jsBlobText) {
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return false;
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}
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JS_SET_RVAL(aCx, aVp, STRING_TO_JSVAL(jsBlobText));
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return true;
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}
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static JSBool
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ReadAsText(JSContext* aCx, unsigned aArgc, jsval* aVp)
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{
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JSObject* obj = JS_THIS_OBJECT(aCx, aVp);
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if (!obj) {
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return false;
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}
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FileReaderSyncPrivate* fileReader =
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GetInstancePrivate(aCx, obj, "readAsText");
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if (!fileReader) {
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return false;
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}
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JSObject* jsBlob;
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JSString* jsEncoding = JS_GetEmptyString(JS_GetRuntime(aCx));
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if (!JS_ConvertArguments(aCx, aArgc, JS_ARGV(aCx, aVp), "o/S", &jsBlob,
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&jsEncoding)) {
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return false;
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}
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nsDependentJSString encoding;
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if (!encoding.init(aCx, jsEncoding)) {
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return false;
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}
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nsIDOMBlob* blob = GetDOMBlobFromJSObject(aCx, jsBlob);
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if (!blob) {
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return false;
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}
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nsString blobText;
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nsresult rv = fileReader->ReadAsText(blob, encoding, blobText);
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if (!EnsureSucceededOrThrow(aCx, rv)) {
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return false;
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}
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JSString* jsBlobText = JS_NewUCStringCopyN(aCx, blobText.get(),
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blobText.Length());
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if (!jsBlobText) {
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return false;
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}
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JS_SET_RVAL(aCx, aVp, STRING_TO_JSVAL(jsBlobText));
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return true;
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}
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};
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JSClass FileReaderSync::sClass = {
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"FileReaderSync",
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JSCLASS_HAS_PRIVATE,
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JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
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JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, Finalize
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};
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JSFunctionSpec FileReaderSync::sFunctions[] = {
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JS_FN("readAsArrayBuffer", ReadAsArrayBuffer, 1, FUNCTION_FLAGS),
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JS_FN("readAsBinaryString", ReadAsBinaryString, 1, FUNCTION_FLAGS),
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JS_FN("readAsText", ReadAsText, 1, FUNCTION_FLAGS),
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JS_FN("readAsDataURL", ReadAsDataURL, 1, FUNCTION_FLAGS),
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JS_FS_END
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};
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} // anonymous namespace
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BEGIN_WORKERS_NAMESPACE
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namespace filereadersync {
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bool
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InitClass(JSContext* aCx, JSObject* aGlobal)
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{
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return !!FileReaderSync::InitClass(aCx, aGlobal);
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}
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} // namespace filereadersync
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END_WORKERS_NAMESPACE
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