author Oleg Romashin <>
Wed, 20 Nov 2013 16:08:36 -0800
changeset 157013 0752cf4780e0b726a238607d8c1135a1cf176875
parent 149504 799dffa9306bf8c3311b0f827a09e78eaa93e56f
permissions -rw-r--r--
Backed out 3 changesets (bug 822898) for mochitest bustage on B2G ICS emulator

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */


#include "nsIURI.h"
#include "MainThreadUtils.h"
#include "nsNetUtil.h"

namespace mozilla {
namespace image {

/** ImageURL
 * nsStandardURL is not threadsafe, so this class is created to hold only the
 * necessary URL data required for image loading and decoding.
 * Note: Although several APIs have the same or similar prototypes as those
 * found in nsIURI/nsStandardURL, the class does not implement nsIURI. This is
 * intentional; functionality is limited, and is only useful for imagelib code.
 * By not implementing nsIURI, external code cannot unintentionally be given an
 * nsIURI pointer with this limited class behind it; instead, conversion to a
 * fully implemented nsIURI is required (e.g. through NS_NewURI).
class ImageURL
  explicit ImageURL(nsIURI* aURI) {
    MOZ_ASSERT(NS_IsMainThread(), "Cannot use nsIURI off main thread!");


  nsresult GetSpec(nsACString &result) {
    result = mSpec;
    return NS_OK;

  nsresult GetScheme(nsACString &result) {
    result = mScheme;
    return NS_OK;

  nsresult SchemeIs(const char *scheme, bool *result)
    NS_PRECONDITION(scheme, "scheme is null");
    NS_PRECONDITION(result, "result is null");

    *result = mScheme.Equals(scheme);
    return NS_OK;

  nsresult GetRef(nsACString &result) {
    result = mRef;
    return NS_OK;

  already_AddRefed<nsIURI> ToIURI() {
               "Convert to nsIURI on main thread only; it is not threadsafe.");
    nsCOMPtr<nsIURI> newURI;
    NS_NewURI(getter_AddRefs(newURI), mSpec);
    return newURI.forget();

  // Since this is a basic storage class, no duplication of spec parsing is
  // included in the functionality. Instead, the class depends upon the
  // parsing implementation in the nsIURI class used in object construction.
  // This means each field is stored separately, but since only a few are
  // required, this small memory tradeoff for threadsafe usage should be ok.
  nsAutoCString mSpec;
  nsAutoCString mScheme;
  nsAutoCString mRef;

} // namespace image
} // namespace mozilla