зеркало из https://github.com/mozilla/pjs.git
603 строки
22 KiB
C++
603 строки
22 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is the Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Double <chris.double@double.co.nz>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* rendering object for the HTML <video> element */
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#include "nsHTMLParts.h"
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsGkAtoms.h"
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#include "nsVideoFrame.h"
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#include "nsHTMLVideoElement.h"
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#include "nsIDOMHTMLVideoElement.h"
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#include "nsDisplayList.h"
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#include "gfxContext.h"
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#include "gfxImageSurface.h"
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#include "nsPresContext.h"
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#include "nsTransform2D.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsBoxLayoutState.h"
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#include "nsBoxFrame.h"
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#include "nsImageFrame.h"
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#include "nsIImageLoadingContent.h"
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#include "nsDisplayList.h"
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#include "nsCSSRendering.h"
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#include "nsContentUtils.h"
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#ifdef ACCESSIBILITY
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#include "nsIServiceManager.h"
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#include "nsAccessibilityService.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::layers;
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using namespace mozilla::dom;
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nsIFrame*
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NS_NewHTMLVideoFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsVideoFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsVideoFrame)
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nsVideoFrame::nsVideoFrame(nsStyleContext* aContext) :
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nsContainerFrame(aContext)
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{
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}
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nsVideoFrame::~nsVideoFrame()
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{
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}
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NS_QUERYFRAME_HEAD(nsVideoFrame)
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NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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nsresult
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nsVideoFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
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{
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nsNodeInfoManager *nodeInfoManager = GetContent()->GetCurrentDoc()->NodeInfoManager();
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nsCOMPtr<nsINodeInfo> nodeInfo;
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if (HasVideoElement()) {
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// Create an anonymous image element as a child to hold the poster
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// image. We may not have a poster image now, but one could be added
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// before we load, or on a subsequent load.
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nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::img,
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nsnull,
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kNameSpaceID_XHTML,
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nsIDOMNode::ELEMENT_NODE);
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NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
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Element* element = NS_NewHTMLImageElement(nodeInfo.forget());
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mPosterImage = element;
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NS_ENSURE_TRUE(mPosterImage, NS_ERROR_OUT_OF_MEMORY);
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// Push a null JSContext on the stack so that code that runs
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// within the below code doesn't think it's being called by
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// JS. See bug 604262.
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nsCxPusher pusher;
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pusher.PushNull();
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// Set the nsImageLoadingContent::ImageState() to 0. This means that the
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// image will always report its state as 0, so it will never be reframed
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// to show frames for loading or the broken image icon. This is important,
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// as the image is native anonymous, and so can't be reframed (currently).
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nsCOMPtr<nsIImageLoadingContent> imgContent = do_QueryInterface(mPosterImage);
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NS_ENSURE_TRUE(imgContent, NS_ERROR_FAILURE);
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imgContent->ForceImageState(true, 0);
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// And now have it update its internal state
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element->UpdateState(false);
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nsresult res = UpdatePosterSource(false);
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NS_ENSURE_SUCCESS(res,res);
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if (!aElements.AppendElement(mPosterImage))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// Set up "videocontrols" XUL element which will be XBL-bound to the
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// actual controls.
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nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::videocontrols,
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nsnull,
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kNameSpaceID_XUL,
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nsIDOMNode::ELEMENT_NODE);
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NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
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NS_TrustedNewXULElement(getter_AddRefs(mVideoControls), nodeInfo.forget());
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if (!aElements.AppendElement(mVideoControls))
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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void
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nsVideoFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
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PRUint32 aFliter)
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{
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aElements.MaybeAppendElement(mPosterImage);
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aElements.MaybeAppendElement(mVideoControls);
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}
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void
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nsVideoFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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nsContentUtils::DestroyAnonymousContent(&mVideoControls);
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nsContentUtils::DestroyAnonymousContent(&mPosterImage);
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nsContainerFrame::DestroyFrom(aDestructRoot);
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}
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bool
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nsVideoFrame::IsLeaf() const
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{
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return true;
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}
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// Return the largest rectangle that fits in aRect and has the
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// same aspect ratio as aRatio, centered at the center of aRect
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static gfxRect
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CorrectForAspectRatio(const gfxRect& aRect, const nsIntSize& aRatio)
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{
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NS_ASSERTION(aRatio.width > 0 && aRatio.height > 0 && !aRect.IsEmpty(),
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"Nothing to draw");
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// Choose scale factor that scales aRatio to just fit into aRect
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gfxFloat scale =
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NS_MIN(aRect.Width()/aRatio.width, aRect.Height()/aRatio.height);
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gfxSize scaledRatio(scale*aRatio.width, scale*aRatio.height);
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gfxPoint topLeft((aRect.Width() - scaledRatio.width)/2,
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(aRect.Height() - scaledRatio.height)/2);
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return gfxRect(aRect.TopLeft() + topLeft, scaledRatio);
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}
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already_AddRefed<Layer>
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nsVideoFrame::BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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nsDisplayItem* aItem)
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{
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nsRect area = GetContentRect() - GetPosition() + aItem->ToReferenceFrame();
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nsHTMLVideoElement* element = static_cast<nsHTMLVideoElement*>(GetContent());
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nsIntSize videoSize = element->GetVideoSize(nsIntSize(0, 0));
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if (videoSize.width <= 0 || videoSize.height <= 0 || area.IsEmpty())
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return nsnull;
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nsRefPtr<ImageContainer> container = element->GetImageContainer();
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// Retrieve the size of the decoded video frame, before being scaled
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// by pixel aspect ratio.
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gfxIntSize frameSize = container->GetCurrentSize();
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if (frameSize.width == 0 || frameSize.height == 0) {
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// No image, or zero-sized image. No point creating a layer.
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return nsnull;
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}
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// Compute the rectangle in which to paint the video. We need to use
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// the largest rectangle that fills our content-box and has the
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// correct aspect ratio.
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nsPresContext* presContext = PresContext();
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gfxRect r = gfxRect(presContext->AppUnitsToGfxUnits(area.x),
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presContext->AppUnitsToGfxUnits(area.y),
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presContext->AppUnitsToGfxUnits(area.width),
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presContext->AppUnitsToGfxUnits(area.height));
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r = CorrectForAspectRatio(r, videoSize);
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r.Round();
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gfxIntSize scaleHint(static_cast<PRInt32>(r.Width()),
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static_cast<PRInt32>(r.Height()));
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container->SetScaleHint(scaleHint);
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nsRefPtr<ImageLayer> layer = static_cast<ImageLayer*>
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(aBuilder->LayerBuilder()->GetLeafLayerFor(aBuilder, aManager, aItem));
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if (!layer) {
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layer = aManager->CreateImageLayer();
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if (!layer)
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return nsnull;
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}
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layer->SetContainer(container);
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layer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(this));
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layer->SetContentFlags(Layer::CONTENT_OPAQUE);
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// Set a transform on the layer to draw the video in the right place
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gfxMatrix transform;
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transform.Translate(r.TopLeft());
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transform.Scale(r.Width()/frameSize.width, r.Height()/frameSize.height);
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layer->SetTransform(gfx3DMatrix::From2D(transform));
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layer->SetVisibleRegion(nsIntRect(0, 0, frameSize.width, frameSize.height));
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nsRefPtr<Layer> result = layer.forget();
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return result.forget();
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}
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NS_IMETHODIMP
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nsVideoFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsVideoFrame::Reflow: availSize=%d,%d",
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aReflowState.availableWidth, aReflowState.availableHeight));
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NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
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aStatus = NS_FRAME_COMPLETE;
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aMetrics.width = aReflowState.ComputedWidth();
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aMetrics.height = aReflowState.ComputedHeight();
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// stash this away so we can compute our inner area later
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mBorderPadding = aReflowState.mComputedBorderPadding;
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aMetrics.width += mBorderPadding.left + mBorderPadding.right;
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aMetrics.height += mBorderPadding.top + mBorderPadding.bottom;
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// Reflow the child frames. We may have up to two, an image frame
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// which is the poster, and a box frame, which is the video controls.
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for (nsIFrame *child = mFrames.FirstChild();
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child;
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child = child->GetNextSibling()) {
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if (child->GetType() == nsGkAtoms::imageFrame) {
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// Reflow the poster frame.
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nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
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nsHTMLReflowMetrics kidDesiredSize;
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nsSize availableSize = nsSize(aReflowState.availableWidth,
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aReflowState.availableHeight);
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nsHTMLReflowState kidReflowState(aPresContext,
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aReflowState,
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imageFrame,
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availableSize,
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aMetrics.width,
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aMetrics.height);
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if (ShouldDisplayPoster()) {
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kidReflowState.SetComputedWidth(aReflowState.ComputedWidth());
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kidReflowState.SetComputedHeight(aReflowState.ComputedHeight());
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} else {
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kidReflowState.SetComputedWidth(0);
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kidReflowState.SetComputedHeight(0);
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}
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ReflowChild(imageFrame, aPresContext, kidDesiredSize, kidReflowState,
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mBorderPadding.left, mBorderPadding.top, 0, aStatus);
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FinishReflowChild(imageFrame, aPresContext,
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&kidReflowState, kidDesiredSize,
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mBorderPadding.left, mBorderPadding.top, 0);
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} else if (child->GetType() == nsGkAtoms::boxFrame) {
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// Reflow the video controls frame.
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nsBoxLayoutState boxState(PresContext(), aReflowState.rendContext);
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nsBoxFrame::LayoutChildAt(boxState,
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child,
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nsRect(mBorderPadding.left,
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mBorderPadding.top,
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aReflowState.ComputedWidth(),
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aReflowState.ComputedHeight()));
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}
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}
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aMetrics.SetOverflowAreasToDesiredBounds();
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FinishAndStoreOverflow(&aMetrics);
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if (mRect.width != aMetrics.width || mRect.height != aMetrics.height) {
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Invalidate(nsRect(0, 0, mRect.width, mRect.height));
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}
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("exit nsVideoFrame::Reflow: size=%d,%d",
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aMetrics.width, aMetrics.height));
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
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return NS_OK;
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}
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class nsDisplayVideo : public nsDisplayItem {
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public:
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nsDisplayVideo(nsDisplayListBuilder* aBuilder, nsVideoFrame* aFrame)
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: nsDisplayItem(aBuilder, aFrame)
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{
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MOZ_COUNT_CTOR(nsDisplayVideo);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayVideo() {
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MOZ_COUNT_DTOR(nsDisplayVideo);
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}
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#endif
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NS_DISPLAY_DECL_NAME("Video", TYPE_VIDEO)
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// It would be great if we could override GetOpaqueRegion to return nonempty here,
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// but it's probably not safe to do so in general. Video frames are
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// updated asynchronously from decoder threads, and it's possible that
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// we might have an opaque video frame when GetOpaqueRegion is called, but
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// when we come to paint, the video frame is transparent or has gone
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// away completely (e.g. because of a decoder error). The problem would
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// be especially acute if we have off-main-thread rendering.
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder)
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{
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nsIFrame* f = GetUnderlyingFrame();
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return f->GetContentRect() - f->GetPosition() + ToReferenceFrame();
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}
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virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerParameters& aContainerParameters)
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{
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return static_cast<nsVideoFrame*>(mFrame)->BuildLayer(aBuilder, aManager, this);
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}
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virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager)
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{
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if (aManager->GetBackendType() != LayerManager::LAYERS_BASIC) {
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// For non-basic layer managers we can assume that compositing
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// layers is very cheap, and since ImageLayers don't require
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// additional memory of the video frames we have to have anyway,
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// we can't save much by making layers inactive. Also, for many
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// accelerated layer managers calling
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// imageContainer->GetCurrentAsSurface can be very expensive. So
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// just always be active for these managers.
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return LAYER_ACTIVE;
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}
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nsHTMLMediaElement* elem =
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static_cast<nsHTMLMediaElement*>(mFrame->GetContent());
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return elem->IsPotentiallyPlaying() ? LAYER_ACTIVE : LAYER_INACTIVE;
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}
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};
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NS_IMETHODIMP
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nsVideoFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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if (!IsVisibleForPainting(aBuilder))
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return NS_OK;
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DO_GLOBAL_REFLOW_COUNT_DSP("nsVideoFrame");
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nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
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NS_ENSURE_SUCCESS(rv, rv);
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nsDisplayList replacedContent;
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if (HasVideoElement() && !ShouldDisplayPoster()) {
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rv = replacedContent.AppendNewToTop(
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new (aBuilder) nsDisplayVideo(aBuilder, this));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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// Add child frames to display list. We expect up to two children, an image
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// frame for the poster, and the box frame for the video controls.
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for (nsIFrame *child = mFrames.FirstChild();
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child;
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child = child->GetNextSibling()) {
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if (child->GetType() == nsGkAtoms::imageFrame && ShouldDisplayPoster()) {
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rv = child->BuildDisplayListForStackingContext(aBuilder,
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aDirtyRect - child->GetOffsetTo(this),
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&replacedContent);
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NS_ENSURE_SUCCESS(rv,rv);
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} else if (child->GetType() == nsGkAtoms::boxFrame) {
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rv = child->BuildDisplayListForStackingContext(aBuilder,
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aDirtyRect - child->GetOffsetTo(this),
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&replacedContent);
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NS_ENSURE_SUCCESS(rv,rv);
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}
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}
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WrapReplacedContentForBorderRadius(aBuilder, &replacedContent, aLists);
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return NS_OK;
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}
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nsIAtom*
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nsVideoFrame::GetType() const
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{
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return nsGkAtoms::HTMLVideoFrame;
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}
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#ifdef ACCESSIBILITY
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already_AddRefed<nsAccessible>
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nsVideoFrame::CreateAccessible()
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{
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nsAccessibilityService* accService = nsIPresShell::AccService();
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return accService ?
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accService->CreateHTMLMediaAccessible(mContent, PresContext()->PresShell()) :
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nsnull;
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}
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#endif
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#ifdef DEBUG
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NS_IMETHODIMP
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nsVideoFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("HTMLVideo"), aResult);
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}
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#endif
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nsSize nsVideoFrame::ComputeSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize,
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nscoord aAvailableWidth,
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nsSize aMargin,
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nsSize aBorder,
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nsSize aPadding,
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bool aShrinkWrap)
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{
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nsSize size = GetVideoIntrinsicSize(aRenderingContext);
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IntrinsicSize intrinsicSize;
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intrinsicSize.width.SetCoordValue(size.width);
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intrinsicSize.height.SetCoordValue(size.height);
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nsSize& intrinsicRatio = size; // won't actually be used
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return nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(aRenderingContext,
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this,
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intrinsicSize,
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intrinsicRatio,
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aCBSize,
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aMargin,
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aBorder,
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aPadding);
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}
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nscoord nsVideoFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
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{
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nscoord result = GetVideoIntrinsicSize(aRenderingContext).width;
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DISPLAY_MIN_WIDTH(this, result);
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return result;
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}
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|
|
nscoord nsVideoFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nscoord result = GetVideoIntrinsicSize(aRenderingContext).width;
|
|
DISPLAY_PREF_WIDTH(this, result);
|
|
return result;
|
|
}
|
|
|
|
nsSize nsVideoFrame::GetIntrinsicRatio()
|
|
{
|
|
return GetVideoIntrinsicSize(nsnull);
|
|
}
|
|
|
|
bool nsVideoFrame::ShouldDisplayPoster()
|
|
{
|
|
if (!HasVideoElement())
|
|
return false;
|
|
|
|
nsHTMLVideoElement* element = static_cast<nsHTMLVideoElement*>(GetContent());
|
|
if (element->GetPlayedOrSeeked() && HasVideoData())
|
|
return false;
|
|
|
|
nsCOMPtr<nsIImageLoadingContent> imgContent = do_QueryInterface(mPosterImage);
|
|
NS_ENSURE_TRUE(imgContent, false);
|
|
|
|
nsCOMPtr<imgIRequest> request;
|
|
nsresult res = imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(request));
|
|
if (NS_FAILED(res) || !request) {
|
|
return false;
|
|
}
|
|
|
|
PRUint32 status = 0;
|
|
res = request->GetImageStatus(&status);
|
|
if (NS_FAILED(res) || (status & imgIRequest::STATUS_ERROR))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
nsSize
|
|
nsVideoFrame::GetVideoIntrinsicSize(nsRenderingContext *aRenderingContext)
|
|
{
|
|
// Defaulting size to 300x150 if no size given.
|
|
nsIntSize size(300, 150);
|
|
|
|
if (ShouldDisplayPoster()) {
|
|
// Use the poster image frame's size.
|
|
nsIFrame *child = mFrames.FirstChild();
|
|
if (child && child->GetType() == nsGkAtoms::imageFrame) {
|
|
nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
|
|
nsSize imgsize;
|
|
if (NS_SUCCEEDED(imageFrame->GetIntrinsicImageSize(imgsize))) {
|
|
return imgsize;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!HasVideoElement()) {
|
|
if (!aRenderingContext || !mFrames.FirstChild()) {
|
|
// We just want our intrinsic ratio, but audio elements need no
|
|
// intrinsic ratio, so just return "no ratio". Also, if there's
|
|
// no controls frame, we prefer to be zero-sized.
|
|
return nsSize(0, 0);
|
|
}
|
|
|
|
// Ask the controls frame what its preferred height is
|
|
nsBoxLayoutState boxState(PresContext(), aRenderingContext, 0);
|
|
nscoord prefHeight = mFrames.LastChild()->GetPrefSize(boxState).height;
|
|
return nsSize(nsPresContext::CSSPixelsToAppUnits(size.width), prefHeight);
|
|
}
|
|
|
|
nsHTMLVideoElement* element = static_cast<nsHTMLVideoElement*>(GetContent());
|
|
size = element->GetVideoSize(size);
|
|
|
|
return nsSize(nsPresContext::CSSPixelsToAppUnits(size.width),
|
|
nsPresContext::CSSPixelsToAppUnits(size.height));
|
|
}
|
|
|
|
nsresult
|
|
nsVideoFrame::UpdatePosterSource(bool aNotify)
|
|
{
|
|
NS_ASSERTION(HasVideoElement(), "Only call this on <video> elements.");
|
|
nsHTMLVideoElement* element = static_cast<nsHTMLVideoElement*>(GetContent());
|
|
|
|
nsAutoString posterStr;
|
|
element->GetPoster(posterStr);
|
|
nsresult res = mPosterImage->SetAttr(kNameSpaceID_None,
|
|
nsGkAtoms::src,
|
|
posterStr,
|
|
aNotify);
|
|
NS_ENSURE_SUCCESS(res,res);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsVideoFrame::AttributeChanged(PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType)
|
|
{
|
|
if (aAttribute == nsGkAtoms::poster && HasVideoElement()) {
|
|
nsresult res = UpdatePosterSource(true);
|
|
NS_ENSURE_SUCCESS(res,res);
|
|
}
|
|
return nsContainerFrame::AttributeChanged(aNameSpaceID,
|
|
aAttribute,
|
|
aModType);
|
|
}
|
|
|
|
bool nsVideoFrame::HasVideoElement() {
|
|
nsCOMPtr<nsIDOMHTMLVideoElement> videoDomElement = do_QueryInterface(mContent);
|
|
return videoDomElement != nsnull;
|
|
}
|
|
|
|
bool nsVideoFrame::HasVideoData()
|
|
{
|
|
if (!HasVideoElement())
|
|
return false;
|
|
nsHTMLVideoElement* element = static_cast<nsHTMLVideoElement*>(GetContent());
|
|
nsIntSize size = element->GetVideoSize(nsIntSize(0,0));
|
|
return size != nsIntSize(0,0);
|
|
}
|