The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/dom/file/MetadataHelper.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,96 @@
     1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* vim: set ts=2 et sw=2 tw=80: */
     1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
     1.8 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.9 +
    1.10 +#include "MetadataHelper.h"
    1.11 +
    1.12 +#include "LockedFile.h"
    1.13 +
    1.14 +USING_FILE_NAMESPACE
    1.15 +
    1.16 +nsresult
    1.17 +MetadataHelper::DoAsyncRun(nsISupports* aStream)
    1.18 +{
    1.19 +  bool readWrite = mLockedFile->mMode == FileMode::Readwrite;
    1.20 +
    1.21 +  nsRefPtr<AsyncMetadataGetter> getter =
    1.22 +    new AsyncMetadataGetter(aStream, mParams, readWrite);
    1.23 +
    1.24 +  nsresult rv = getter->AsyncWork(this, nullptr);
    1.25 +  NS_ENSURE_SUCCESS(rv, rv);
    1.26 +
    1.27 +  return NS_OK;
    1.28 +}
    1.29 +
    1.30 +nsresult
    1.31 +MetadataHelper::GetSuccessResult(JSContext* aCx,
    1.32 +                                 JS::MutableHandle<JS::Value> aVal)
    1.33 +{
    1.34 +  JS::Rooted<JSObject*> obj(aCx, JS_NewObject(aCx, nullptr, JS::NullPtr(),
    1.35 +                                              JS::NullPtr()));
    1.36 +  NS_ENSURE_TRUE(obj, NS_ERROR_OUT_OF_MEMORY);
    1.37 +
    1.38 +  if (mParams->SizeRequested()) {
    1.39 +    JS::Rooted<JS::Value> val(aCx, JS_NumberValue(mParams->Size()));
    1.40 +
    1.41 +    if (!JS_DefineProperty(aCx, obj, "size", val, JSPROP_ENUMERATE)) {
    1.42 +      return NS_ERROR_FAILURE;
    1.43 +    }
    1.44 +  }
    1.45 +
    1.46 +  if (mParams->LastModifiedRequested()) {
    1.47 +    double msec = mParams->LastModified();
    1.48 +    JSObject *date = JS_NewDateObjectMsec(aCx, msec);
    1.49 +    NS_ENSURE_TRUE(date, NS_ERROR_OUT_OF_MEMORY);
    1.50 +
    1.51 +    JS::Rooted<JS::Value> dateRoot(aCx, JS::ObjectValue(*date));
    1.52 +    if (!JS_DefineProperty(aCx, obj, "lastModified", dateRoot,
    1.53 +                           JSPROP_ENUMERATE)) {
    1.54 +      return NS_ERROR_FAILURE;
    1.55 +    }
    1.56 +  }
    1.57 +
    1.58 +  aVal.setObject(*obj);
    1.59 +  return NS_OK;
    1.60 +}
    1.61 +
    1.62 +nsresult
    1.63 +MetadataHelper::AsyncMetadataGetter::DoStreamWork(nsISupports* aStream)
    1.64 +{
    1.65 +  nsresult rv;
    1.66 +
    1.67 +  if (mReadWrite) {
    1.68 +    // Force a flush (so all pending writes are flushed to the disk and file
    1.69 +    // metadata is updated too).
    1.70 +
    1.71 +    nsCOMPtr<nsIOutputStream> ostream = do_QueryInterface(aStream);
    1.72 +    NS_ASSERTION(ostream, "This should always succeed!");
    1.73 +
    1.74 +    rv = ostream->Flush();
    1.75 +    NS_ENSURE_SUCCESS(rv, rv);
    1.76 +  }
    1.77 +
    1.78 +  nsCOMPtr<nsIFileMetadata> metadata = do_QueryInterface(aStream);
    1.79 +
    1.80 +  if (mParams->SizeRequested()) {
    1.81 +    int64_t size;
    1.82 +    rv = metadata->GetSize(&size);
    1.83 +    NS_ENSURE_SUCCESS(rv, rv);
    1.84 +
    1.85 +    NS_ENSURE_TRUE(size >= 0, NS_ERROR_FAILURE);
    1.86 +
    1.87 +    mParams->mSize = uint64_t(size);
    1.88 +  }
    1.89 +
    1.90 +  if (mParams->LastModifiedRequested()) {
    1.91 +    int64_t lastModified;
    1.92 +    rv = metadata->GetLastModified(&lastModified);
    1.93 +    NS_ENSURE_SUCCESS(rv, rv);
    1.94 +
    1.95 +    mParams->mLastModified = lastModified;
    1.96 +  }
    1.97 +
    1.98 +  return NS_OK;
    1.99 +}