Quelle MediaDocument.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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 "MediaDocument.h"
#include "nsGkAtoms.h"
#include "nsRect.h"
#include "nsPresContext.h"
#include "nsViewManager.h"
#include "nsITextToSubURI.h"
#include "nsIURL.h"
#include "nsIDocShell.h"
#include "nsCharsetSource.h"  // kCharsetFrom* macro definition
#include "nsNodeInfoManager.h"
#include "nsContentUtils.h"
#include "nsDocElementCreatedNotificationRunner.h"
#include "mozilla/Encoding.h"
#include "mozilla/PresShell.h"
#include "mozilla/Components.h"
#include "nsServiceManagerUtils.h"
#include "nsIPrincipal.h"
#include "nsIMultiPartChannel.h"
#include "nsProxyRelease.h"

namespace mozilla::dom {

MediaDocumentStreamListener::MediaDocumentStreamListener(
    MediaDocument* aDocument)
    : mDocument(aDocument) {}

MediaDocumentStreamListener::~MediaDocumentStreamListener() {
  if (mDocument && !NS_IsMainThread()) {
    nsCOMPtr<nsIEventTarget> mainTarget(do_GetMainThread());
    NS_ProxyRelease("MediaDocumentStreamListener::mDocument", mainTarget,
                    mDocument.forget());
  }
}

NS_IMPL_ISUPPORTS(MediaDocumentStreamListener, nsIRequestObserver,
                  nsIStreamListener, nsIThreadRetargetableStreamListener)

NS_IMETHODIMP
MediaDocumentStreamListener::OnStartRequest(nsIRequest* request) {
  NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);

  mDocument->StartLayout();

  if (mNextStream) {
    return mNextStream->OnStartRequest(request);
  }

  return NS_ERROR_PARSED_DATA_CACHED;
}

NS_IMETHODIMP
MediaDocumentStreamListener::OnStopRequest(nsIRequest* request,
                                           nsresult status) {
  nsresult rv = NS_OK;
  if (mNextStream) {
    rv = mNextStream->OnStopRequest(request, status);
  }

  // Don't release mDocument here if we're in the middle of a multipart
  // response.
  bool lastPart = true;
  nsCOMPtr<nsIMultiPartChannel> mpchan(do_QueryInterface(request));
  if (mpchan) {
    mpchan->GetIsLastPart(&lastPart);
  }

  if (lastPart) {
    mDocument = nullptr;
  }
  return rv;
}

NS_IMETHODIMP
MediaDocumentStreamListener::OnDataAvailable(nsIRequest* request,
                                             nsIInputStream* inStr,
                                             uint64_t sourceOffset,
                                             uint32_t count) {
  if (mNextStream) {
    return mNextStream->OnDataAvailable(request, inStr, sourceOffset, count);
  }

  return NS_OK;
}

NS_IMETHODIMP
MediaDocumentStreamListener::OnDataFinished(nsresult aStatus) {
  if (!mNextStream) {
    return NS_ERROR_FAILURE;
  }
  nsCOMPtr<nsIThreadRetargetableStreamListener> retargetable =
      do_QueryInterface(mNextStream);
  if (retargetable) {
    return retargetable->OnDataFinished(aStatus);
  }

  return NS_OK;
}

NS_IMETHODIMP
MediaDocumentStreamListener::CheckListenerChain() {
  nsCOMPtr<nsIThreadRetargetableStreamListener> retargetable =
      do_QueryInterface(mNextStream);
  if (retargetable) {
    return retargetable->CheckListenerChain();
  }
  return NS_ERROR_NO_INTERFACE;
}

// default format names for MediaDocument.
const char* const MediaDocument::sFormatNames[4] = {
    "MediaTitleWithNoInfo",  // eWithNoInfo
    "MediaTitleWithFile",    // eWithFile
    "",                      // eWithDim
    ""                       // eWithDimAndFile
};

MediaDocument::MediaDocument() : mDidInitialDocumentSetup(false) {
  mCompatMode = eCompatibility_FullStandards;
}
MediaDocument::~MediaDocument() = default;

nsresult MediaDocument::Init(nsIPrincipal* aPrincipal,
                             nsIPrincipal* aPartitionedPrincipal) {
  nsresult rv = nsHTMLDocument::Init(aPrincipal, aPartitionedPrincipal);
  NS_ENSURE_SUCCESS(rv, rv);

  mIsSyntheticDocument = true;

  return NS_OK;
}

nsresult MediaDocument::StartDocumentLoad(
    const char* aCommand, nsIChannel* aChannel, nsILoadGroup* aLoadGroup,
    nsISupports* aContainer, nsIStreamListener** aDocListener, bool aReset) {
  nsresult rv = Document::StartDocumentLoad(aCommand, aChannel, aLoadGroup,
                                            aContainer, aDocListener, aReset);
  if (NS_FAILED(rv)) {
    return rv;
  }

  // We try to set the charset of the current document to that of the
  // 'genuine' (as opposed to an intervening 'chrome') parent document
  // that may be in a different window/tab. Even if we fail here,
  // we just return NS_OK because another attempt is made in
  // |UpdateTitleAndCharset| and the worst thing possible is a mangled
  // filename in the titlebar and the file picker.

  // Note that we
  // exclude UTF-8 as 'invalid' because UTF-8 is likely to be the charset
  // of a chrome document that has nothing to do with the actual content
  // whose charset we want to know. Even if "the actual content" is indeed
  // in UTF-8, we don't lose anything because the default empty value is
  // considered synonymous with UTF-8.

  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aContainer));

  // not being able to set the charset is not critical.
  NS_ENSURE_TRUE(docShell, NS_OK);

  const Encoding* encoding;
  int32_t source;
  nsCOMPtr<nsIPrincipal> principal;
  // opening in a new tab
  docShell->GetParentCharset(encoding, &source, getter_AddRefs(principal));

  if (encoding && encoding != UTF_8_ENCODING &&
      NodePrincipal()->Equals(principal)) {
    SetDocumentCharacterSetSource(source);
    SetDocumentCharacterSet(WrapNotNull(encoding));
  }

  return NS_OK;
}

void MediaDocument::InitialSetupDone() {
  MOZ_ASSERT(GetReadyStateEnum() == Document::READYSTATE_LOADING,
             "Bad readyState: we should still be doing our initial load");
  mDidInitialDocumentSetup = true;
  nsContentUtils::AddScriptRunner(
      new nsDocElementCreatedNotificationRunner(this));
  SetReadyStateInternal(Document::READYSTATE_INTERACTIVE);
}

nsresult MediaDocument::CreateSyntheticDocument() {
  MOZ_ASSERT(!InitialSetupHasBeenDone());

  // Synthesize an empty html document

  RefPtr<mozilla::dom::NodeInfo> nodeInfo;
  nodeInfo = mNodeInfoManager->GetNodeInfo(
      nsGkAtoms::html, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);

  RefPtr<nsGenericHTMLElement> root = NS_NewHTMLHtmlElement(nodeInfo.forget());
  NS_ENSURE_TRUE(root, NS_ERROR_OUT_OF_MEMORY);

  NS_ASSERTION(GetChildCount() == 0, "Shouldn't have any kids");
  ErrorResult rv;
  AppendChildTo(root, false, rv);
  if (rv.Failed()) {
    return rv.StealNSResult();
  }

  nodeInfo = mNodeInfoManager->GetNodeInfo(
      nsGkAtoms::head, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);

  // Create a <head> so our title has somewhere to live
  RefPtr<nsGenericHTMLElement> head = NS_NewHTMLHeadElement(nodeInfo.forget());
  NS_ENSURE_TRUE(head, NS_ERROR_OUT_OF_MEMORY);

  nodeInfo = mNodeInfoManager->GetNodeInfo(
      nsGkAtoms::meta, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);

  RefPtr<nsGenericHTMLElement> metaContent =
      NS_NewHTMLMetaElement(nodeInfo.forget());
  NS_ENSURE_TRUE(metaContent, NS_ERROR_OUT_OF_MEMORY);
  metaContent->SetAttr(kNameSpaceID_None, nsGkAtoms::name, u"viewport"_ns,
                       true);

  metaContent->SetAttr(kNameSpaceID_None, nsGkAtoms::content,
                       u"width=device-width; height=device-height;"_ns, true);
  head->AppendChildTo(metaContent, false, IgnoreErrors());

  root->AppendChildTo(head, false, IgnoreErrors());

  nodeInfo = mNodeInfoManager->GetNodeInfo(
      nsGkAtoms::body, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);

  RefPtr<nsGenericHTMLElement> body = NS_NewHTMLBodyElement(nodeInfo.forget());
  NS_ENSURE_TRUE(body, NS_ERROR_OUT_OF_MEMORY);

  root->AppendChildTo(body, false, IgnoreErrors());

  return NS_OK;
}

nsresult MediaDocument::StartLayout() {
  mMayStartLayout = true;
  RefPtr<PresShell> presShell = GetPresShell();
  // Don't mess with the presshell if someone has already handled
  // its initial reflow.
  if (presShell && !presShell->DidInitialize()) {
    nsresult rv = presShell->Initialize();
    NS_ENSURE_SUCCESS(rv, rv);
  }

  return NS_OK;
}

void MediaDocument::GetFileName(nsAString& aResult, nsIChannel* aChannel) {
  aResult.Truncate();

  if (aChannel) {
    aChannel->GetContentDispositionFilename(aResult);
    if (!aResult.IsEmpty()) return;
  }

  nsCOMPtr<nsIURL> url = do_QueryInterface(mDocumentURI);
  if (!url) return;

  nsAutoCString fileName;
  url->GetFileName(fileName);
  if (fileName.IsEmpty()) return;

  // Now that the charset is set in |StartDocumentLoad| to the charset of
  // the document viewer instead of a bogus value ("windows-1252" set in
  // |Document|'s ctor), the priority is given to the current charset.
  // This is necessary to deal with a media document being opened in a new
  // window or a new tab.
  if (mCharacterSetSource == kCharsetUninitialized) {
    // resort to UTF-8
    SetDocumentCharacterSet(UTF_8_ENCODING);
  }

  nsresult rv;
  nsCOMPtr<nsITextToSubURI> textToSubURI =
      do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
  if (NS_SUCCEEDED(rv)) {
    // UnEscapeURIForUI always succeeds
    textToSubURI->UnEscapeURIForUI(fileName, aResult);
  } else {
    CopyUTF8toUTF16(fileName, aResult);
  }
}

nsresult MediaDocument::LinkStylesheet(const nsAString& aStylesheet) {
  RefPtr<mozilla::dom::NodeInfo> nodeInfo;
  nodeInfo = mNodeInfoManager->GetNodeInfo(
      nsGkAtoms::link, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);

  RefPtr<nsGenericHTMLElement> link = NS_NewHTMLLinkElement(nodeInfo.forget());
  NS_ENSURE_TRUE(link, NS_ERROR_OUT_OF_MEMORY);

  link->SetAttr(kNameSpaceID_None, nsGkAtoms::rel, u"stylesheet"_ns, true);

  link->SetAttr(kNameSpaceID_None, nsGkAtoms::href, aStylesheet, true);

  ErrorResult rv;
  Element* head = GetHeadElement();
  head->AppendChildTo(link, false, rv);
  return rv.StealNSResult();
}

nsresult MediaDocument::LinkScript(const nsAString& aScript) {
  RefPtr<mozilla::dom::NodeInfo> nodeInfo;
  nodeInfo = mNodeInfoManager->GetNodeInfo(
      nsGkAtoms::script, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);

  RefPtr<nsGenericHTMLElement> script =
      NS_NewHTMLScriptElement(nodeInfo.forget());
  NS_ENSURE_TRUE(script, NS_ERROR_OUT_OF_MEMORY);

  script->SetAttr(kNameSpaceID_None, nsGkAtoms::type, u"text/javascript"_ns,
                  true);

  script->SetAttr(kNameSpaceID_None, nsGkAtoms::src, aScript, true);

  ErrorResult rv;
  Element* head = GetHeadElement();
  head->AppendChildTo(script, false, rv);
  return rv.StealNSResult();
}

void MediaDocument::FormatStringFromName(const char* aName,
                                         const nsTArray<nsString>& aParams,
                                         nsAString& aResult) {
  bool spoofLocale = nsContentUtils::SpoofLocaleEnglish() && !AllowsL10n();
  if (!spoofLocale) {
    if (!mStringBundle) {
      nsCOMPtr<nsIStringBundleService> stringService =
          mozilla::components::StringBundle::Service();
      if (stringService) {
        stringService->CreateBundle(NSMEDIADOCUMENT_PROPERTIES_URI,
                                    getter_AddRefs(mStringBundle));
      }
    }
    if (mStringBundle) {
      mStringBundle->FormatStringFromName(aName, aParams, aResult);
    }
  } else {
    if (!mStringBundleEnglish) {
      nsCOMPtr<nsIStringBundleService> stringService =
          mozilla::components::StringBundle::Service();
      if (stringService) {
        stringService->CreateBundle(NSMEDIADOCUMENT_PROPERTIES_URI_en_US,
                                    getter_AddRefs(mStringBundleEnglish));
      }
    }
    if (mStringBundleEnglish) {
      mStringBundleEnglish->FormatStringFromName(aName, aParams, aResult);
    }
  }
}

void MediaDocument::UpdateTitleAndCharset(const nsACString& aTypeStr,
                                          nsIChannel* aChannel,
                                          const char* const* aFormatNames,
                                          int32_t aWidth, int32_t aHeight,
                                          const nsAString& aStatus) {
  nsAutoString fileStr;
  GetFileName(fileStr, aChannel);

  NS_ConvertASCIItoUTF16 typeStr(aTypeStr);
  nsAutoString title;

  // if we got a valid size (not all media have a size)
  if (aWidth != 0 && aHeight != 0) {
    nsAutoString widthStr;
    nsAutoString heightStr;
    widthStr.AppendInt(aWidth);
    heightStr.AppendInt(aHeight);
    // If we got a filename, display it
    if (!fileStr.IsEmpty()) {
      AutoTArray<nsString, 4> formatStrings = {fileStr, typeStr, widthStr,
                                               heightStr};
      FormatStringFromName(aFormatNames[eWithDimAndFile], formatStrings, title);
    } else {
      AutoTArray<nsString, 3> formatStrings = {typeStr, widthStr, heightStr};
      FormatStringFromName(aFormatNames[eWithDim], formatStrings, title);
    }
  } else {
    // If we got a filename, display it
    if (!fileStr.IsEmpty()) {
      AutoTArray<nsString, 2> formatStrings = {fileStr, typeStr};
      FormatStringFromName(aFormatNames[eWithFile], formatStrings, title);
    } else {
      AutoTArray<nsString, 1> formatStrings = {typeStr};
      FormatStringFromName(aFormatNames[eWithNoInfo], formatStrings, title);
    }
  }

  // set it on the document
  if (aStatus.IsEmpty()) {
    IgnoredErrorResult ignored;
    SetTitle(title, ignored);
  } else {
    nsAutoString titleWithStatus;
    AutoTArray<nsString, 2> formatStrings;
    formatStrings.AppendElement(title);
    formatStrings.AppendElement(aStatus);
    FormatStringFromName("TitleWithStatus", formatStrings, titleWithStatus);
    SetTitle(titleWithStatus, IgnoreErrors());
  }
}

}  // namespace mozilla::dom

quality100%

¤ Dauer der Verarbeitung: 0.2 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.