DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (5b81998bb7ab)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "FileRequest.h"

#include "nsIJSContextStack.h"

#include "nsContentUtils.h"
#include "nsEventDispatcher.h"
#include "nsError.h"
#include "nsDOMProgressEvent.h"
#include "nsDOMClassInfoID.h"
#include "FileHelper.h"
#include "LockedFile.h"

USING_FILE_NAMESPACE

FileRequest::FileRequest(nsIDOMWindow* aWindow)
: DOMRequest(aWindow), mIsFileRequest(true)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}

FileRequest::~FileRequest()
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}

// static
already_AddRefed<FileRequest>
FileRequest::Create(nsIDOMWindow* aOwner,
                    LockedFile* aLockedFile,
                    bool aIsFileRequest)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

  nsRefPtr<FileRequest> request = new FileRequest(aOwner);
  request->mLockedFile = aLockedFile;
  request->mIsFileRequest = aIsFileRequest;

  return request.forget();
}

nsresult
FileRequest::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

  aVisitor.mCanHandle = true;
  aVisitor.mParentTarget = mLockedFile;
  return NS_OK;
}

nsresult
FileRequest::NotifyHelperCompleted(FileHelper* aFileHelper)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

  nsresult rv = aFileHelper->mResultCode;

  // If the request failed then fire error event and return.
  if (NS_FAILED(rv)) {
    FireError(rv);
    return NS_OK;
  }

  // Otherwise we need to get the result from the helper.
  jsval result;

  nsIScriptContext* sc = GetContextForEventHandlers(&rv);
  NS_ENSURE_STATE(sc);

  JSContext* cx = sc->GetNativeContext();
  NS_ASSERTION(cx, "Failed to get a context!");

  JSObject* global = sc->GetNativeGlobal();
  NS_ASSERTION(global, "Failed to get global object!");

  JSAutoRequest ar(cx);
  JSAutoCompartment ac(cx, global);

  rv = aFileHelper->GetSuccessResult(cx, &result);
  if (NS_FAILED(rv)) {
    NS_WARNING("GetSuccessResult failed!");
  }

  if (NS_SUCCEEDED(rv)) {
    FireSuccess(result);
  }
  else {
    FireError(rv);
  }

  return NS_OK;
}

NS_IMETHODIMP
FileRequest::GetLockedFile(nsIDOMLockedFile** aLockedFile)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

  nsCOMPtr<nsIDOMLockedFile> lockedFile(mLockedFile);
  lockedFile.forget(aLockedFile);
  return NS_OK;
}

NS_IMPL_CYCLE_COLLECTION_CLASS(FileRequest)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(FileRequest, DOMRequest)
  // Don't need NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS because
  // nsDOMEventTargetHelper does it for us.
  NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(progress)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mLockedFile,
                                                       nsIDOMLockedFile)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(FileRequest, DOMRequest)
  NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(progress)
  NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLockedFile)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FileRequest)
  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIDOMFileRequest, mIsFileRequest)
  NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(FileRequest, mIsFileRequest)
  NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(DOMRequest, !mIsFileRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMRequest)

NS_IMPL_ADDREF_INHERITED(FileRequest, DOMRequest)
NS_IMPL_RELEASE_INHERITED(FileRequest, DOMRequest)

DOMCI_DATA(FileRequest, FileRequest)

NS_IMPL_EVENT_HANDLER(FileRequest, progress)

void
FileRequest::FireProgressEvent(uint64_t aLoaded, uint64_t aTotal)
{
  if (NS_FAILED(CheckInnerWindowCorrectness())) {
    return;
  }

  nsRefPtr<nsDOMProgressEvent> event = new nsDOMProgressEvent(nullptr, nullptr);
  nsresult rv = event->InitProgressEvent(NS_LITERAL_STRING("progress"),
                                         false, false, false, aLoaded, aTotal);
  if (NS_FAILED(rv)) {
    return;
  }

  rv = event->SetTrusted(true);
  if (NS_FAILED(rv)) {
    return;
  }

  bool dummy;
  rv = DispatchEvent(static_cast<nsIDOMProgressEvent*>(event), &dummy);
  if (NS_FAILED(rv)) {
    return;
  }
}

void
FileRequest::RootResultVal()
{
  nsXPCOMCycleCollectionParticipant *participant;
  CallQueryInterface(this, &participant);
  nsContentUtils::HoldJSObjects(NS_CYCLE_COLLECTION_UPCAST(this, DOMRequest),
                                participant);
}