зеркало из https://github.com/mozilla/gecko-dev.git
97 строки
2.5 KiB
C++
97 строки
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MetadataHelper.h"
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#include "LockedFile.h"
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USING_FILE_NAMESPACE
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nsresult
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MetadataHelper::DoAsyncRun(nsISupports* aStream)
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{
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bool readWrite = mLockedFile->mMode == LockedFile::READ_WRITE;
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nsRefPtr<AsyncMetadataGetter> getter =
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new AsyncMetadataGetter(aStream, mParams, readWrite);
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nsresult rv = getter->AsyncWork(this, nullptr);
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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nsresult
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MetadataHelper::GetSuccessResult(JSContext* aCx,
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JS::Value* aVal)
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{
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JS::Rooted<JSObject*> obj(aCx, JS_NewObject(aCx, nullptr, nullptr, nullptr));
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NS_ENSURE_TRUE(obj, NS_ERROR_OUT_OF_MEMORY);
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if (mParams->SizeRequested()) {
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JS::Value val = JS_NumberValue(mParams->Size());
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if (!JS_DefineProperty(aCx, obj, "size", val, nullptr, nullptr,
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JSPROP_ENUMERATE)) {
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return NS_ERROR_FAILURE;
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}
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}
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if (mParams->LastModifiedRequested()) {
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double msec = mParams->LastModified();
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JSObject *date = JS_NewDateObjectMsec(aCx, msec);
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NS_ENSURE_TRUE(date, NS_ERROR_OUT_OF_MEMORY);
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if (!JS_DefineProperty(aCx, obj, "lastModified", OBJECT_TO_JSVAL(date),
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nullptr, nullptr, JSPROP_ENUMERATE)) {
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return NS_ERROR_FAILURE;
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}
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}
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*aVal = OBJECT_TO_JSVAL(obj);
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return NS_OK;
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}
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nsresult
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MetadataHelper::AsyncMetadataGetter::DoStreamWork(nsISupports* aStream)
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{
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nsresult rv;
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if (mReadWrite) {
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// Force a flush (so all pending writes are flushed to the disk and file
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// metadata is updated too).
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nsCOMPtr<nsIOutputStream> ostream = do_QueryInterface(aStream);
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NS_ASSERTION(ostream, "This should always succeed!");
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rv = ostream->Flush();
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NS_ENSURE_SUCCESS(rv, rv);
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}
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nsCOMPtr<nsIFileMetadata> metadata = do_QueryInterface(aStream);
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if (mParams->SizeRequested()) {
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int64_t size;
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rv = metadata->GetSize(&size);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(size >= 0, NS_ERROR_FAILURE);
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mParams->mSize = uint64_t(size);
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}
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if (mParams->LastModifiedRequested()) {
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int64_t lastModified;
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rv = metadata->GetLastModified(&lastModified);
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NS_ENSURE_SUCCESS(rv, rv);
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mParams->mLastModified = lastModified;
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}
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return NS_OK;
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}
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