Stufen

Die Firma ist wie angegeben erreichbar. Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/dom/html/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 5 kB

SSL VideoDocument.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 "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "DocumentInlines.h"
#include "nsContentUtils.h"
#include "mozilla/dom/Element.h"

namespace mozilla::dom {

class VideoDocument final : public MediaDocument {
public:
  enum MediaDocumentKind MediaDocumentKind() const override {
    return MediaDocumentKind::Video;
  }

  virtual nsresult StartDocumentLoad(const char* aCommand, nsIChannel* aChannel,
                                     nsILoadGroup* aLoadGroup,
                                     nsISupports* aContainer,
                                     nsIStreamListener** aDocListener,
                                     bool aReset = true) override;
  virtual void SetScriptGlobalObject(
      nsIScriptGlobalObject* aScriptGlobalObject) override;

  virtual void Destroy() override {
    if (mStreamListener) {
      mStreamListener->DropDocumentRef();
    }
    MediaDocument::Destroy();
  }

  nsresult StartLayout() override;

protected:
  nsresult CreateVideoElement();
  // Sets document <title> to reflect the file name and description.
  void UpdateTitle(nsIChannel* aChannel);

  RefPtr<MediaDocumentStreamListener> mStreamListener;
};

nsresult VideoDocument::StartDocumentLoad(
    const char* aCommand, nsIChannel* aChannel, nsILoadGroup* aLoadGroup,
    nsISupports* aContainer, nsIStreamListener** aDocListener, bool aReset) {
  nsresult rv = MediaDocument::StartDocumentLoad(
      aCommand, aChannel, aLoadGroup, aContainer, aDocListener, aReset);
  NS_ENSURE_SUCCESS(rv, rv);

  mStreamListener = new MediaDocumentStreamListener(this);
  NS_ADDREF(*aDocListener = mStreamListener);
  return rv;
}

nsresult VideoDocument::StartLayout() {
  // Create video element, and begin loading the media resource. Note we
  // delay creating the video element until now (we're called from
  // MediaDocumentStreamListener::OnStartRequest) as the PresShell is likely
  // to have been created by now, so the MediaDecoder will be able to tell
  // what kind of compositor we have, so the video element knows whether
  // it can create a hardware accelerated video decoder or not.
  nsresult rv = CreateVideoElement();
  NS_ENSURE_SUCCESS(rv, rv);

  rv = MediaDocument::StartLayout();
  NS_ENSURE_SUCCESS(rv, rv);

  return NS_OK;
}

void VideoDocument::SetScriptGlobalObject(
    nsIScriptGlobalObject* aScriptGlobalObject) {
  // Set the script global object on the superclass before doing
  // anything that might require it....
  MediaDocument::SetScriptGlobalObject(aScriptGlobalObject);

  if (aScriptGlobalObject && !InitialSetupHasBeenDone()) {
    DebugOnly<nsresult> rv = CreateSyntheticDocument();
    NS_ASSERTION(NS_SUCCEEDED(rv), "failed to create synthetic video document");

    if (!nsContentUtils::IsChildOfSameType(this)) {
      LinkStylesheet(nsLiteralString(
          u"resource://content-accessible/TopLevelVideoDocument.css"));
      LinkScript(u"chrome://global/content/TopLevelVideoDocument.js"_ns);
    }
    InitialSetupDone();
  }
}

nsresult VideoDocument::CreateVideoElement() {
  RefPtr<Element> body = GetBodyElement();
  if (!body) {
    NS_WARNING("no body on video document!");
    return NS_ERROR_FAILURE;
  }

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

  RefPtr<HTMLMediaElement> element = static_cast<HTMLMediaElement*>(
      NS_NewHTMLVideoElement(nodeInfo.forget(), NOT_FROM_PARSER));
  if (!element) return NS_ERROR_OUT_OF_MEMORY;
  element->SetAutoplay(true, IgnoreErrors());
  element->SetControls(true, IgnoreErrors());
  element->LoadWithChannel(mChannel,
                           getter_AddRefs(mStreamListener->mNextStream));
  UpdateTitle(mChannel);

  if (nsContentUtils::IsChildOfSameType(this)) {
    // Video documents that aren't toplevel should fill their frames and
    // not have margins
    element->SetAttr(
        kNameSpaceID_None, nsGkAtoms::style,
        nsLiteralString(
            u"position:absolute; top:0; left:0; width:100%; height:100%"),
        true);
  }

  ErrorResult rv;
  body->AppendChildTo(element, false, rv);
  return rv.StealNSResult();
}

void VideoDocument::UpdateTitle(nsIChannel* aChannel) {
  if (!aChannel) return;

  nsAutoString fileName;
  GetFileName(fileName, aChannel);
  IgnoredErrorResult ignored;
  SetTitle(fileName, ignored);
}

}  // namespace mozilla::dom

nsresult NS_NewVideoDocument(mozilla::dom::Document** aResult,
                             nsIPrincipal* aPrincipal,
                             nsIPrincipal* aPartitionedPrincipal) {
  auto* doc = new mozilla::dom::VideoDocument();

  NS_ADDREF(doc);
  nsresult rv = doc->Init(aPrincipal, aPartitionedPrincipal);

  if (NS_FAILED(rv)) {
    NS_RELEASE(doc);
  }

  *aResult = doc;

  return rv;
}

quality100%