зеркало из https://github.com/mozilla/pjs.git
272 строки
7.5 KiB
C++
272 строки
7.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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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.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@netscape.com>
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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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/* class to notify frames of background image loads */
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#include "nsImageLoader.h"
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#include "imgILoader.h"
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#include "nsIURI.h"
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#include "nsILoadGroup.h"
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#include "nsNetUtil.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIFrame.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "imgIContainer.h"
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#include "nsStyleContext.h"
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#include "nsGkAtoms.h"
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// Paint forcing
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#include "prenv.h"
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NS_IMPL_ISUPPORTS2(nsImageLoader, imgIDecoderObserver, imgIContainerObserver)
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nsImageLoader::nsImageLoader(nsIFrame *aFrame, PRUint32 aActions,
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nsImageLoader *aNextLoader)
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: mFrame(aFrame),
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mActions(aActions),
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mNextLoader(aNextLoader)
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{
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}
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nsImageLoader::~nsImageLoader()
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{
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mFrame = nsnull;
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if (mRequest) {
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mRequest->CancelAndForgetObserver(NS_ERROR_FAILURE);
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}
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}
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/* static */ already_AddRefed<nsImageLoader>
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nsImageLoader::Create(nsIFrame *aFrame, imgIRequest *aRequest,
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PRUint32 aActions, nsImageLoader *aNextLoader)
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{
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nsRefPtr<nsImageLoader> loader =
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new nsImageLoader(aFrame, aActions, aNextLoader);
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loader->Load(aRequest);
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return loader.forget();
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}
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void
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nsImageLoader::Destroy()
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{
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// Destroy the chain with only one level of recursion.
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nsRefPtr<nsImageLoader> list = mNextLoader;
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mNextLoader = nsnull;
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while (list) {
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nsRefPtr<nsImageLoader> todestroy = list;
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list = todestroy->mNextLoader;
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todestroy->mNextLoader = nsnull;
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todestroy->Destroy();
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}
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mFrame = nsnull;
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if (mRequest) {
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mRequest->CancelAndForgetObserver(NS_ERROR_FAILURE);
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}
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mRequest = nsnull;
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}
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nsresult
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nsImageLoader::Load(imgIRequest *aImage)
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{
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NS_ASSERTION(!mRequest, "can't reuse image loaders");
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NS_ASSERTION(mFrame, "not initialized");
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NS_ASSERTION(aImage, "must have non-null image");
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if (!mFrame)
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return NS_ERROR_NOT_INITIALIZED;
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if (!aImage)
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return NS_ERROR_FAILURE;
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// Make sure to clone into a temporary, then set mRequest, since
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// cloning may notify and we don't want to trigger paints from this
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// code.
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nsCOMPtr<imgIRequest> newRequest;
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nsresult rv = aImage->Clone(this, getter_AddRefs(newRequest));
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mRequest.swap(newRequest);
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return rv;
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}
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NS_IMETHODIMP nsImageLoader::OnStartContainer(imgIRequest *aRequest,
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imgIContainer *aImage)
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{
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NS_ABORT_IF_FALSE(aImage, "Who's calling us then?");
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/* Get requested animation policy from the pres context:
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* normal = 0
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* one frame = 1
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* one loop = 2
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*/
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aImage->SetAnimationMode(mFrame->PresContext()->ImageAnimationMode());
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return NS_OK;
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}
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NS_IMETHODIMP nsImageLoader::OnStopFrame(imgIRequest *aRequest,
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PRUint32 aFrame)
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{
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if (!mFrame)
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return NS_ERROR_FAILURE;
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if (!mRequest) {
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// We're in the middle of a paint anyway
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return NS_OK;
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}
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// Take requested actions
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if (mActions & ACTION_REFLOW_ON_DECODE) {
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DoReflow();
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}
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if (mActions & ACTION_REDRAW_ON_DECODE) {
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DoRedraw(nsnull);
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsImageLoader::OnStopRequest(imgIRequest *aRequest,
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bool aLastPart)
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{
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if (!mFrame)
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return NS_ERROR_FAILURE;
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if (!mRequest) {
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// We're in the middle of a paint anyway
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return NS_OK;
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}
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// Take requested actions
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if (mActions & ACTION_REFLOW_ON_LOAD) {
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DoReflow();
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}
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if (mActions & ACTION_REDRAW_ON_LOAD) {
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DoRedraw(nsnull);
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsImageLoader::FrameChanged(imgIContainer *aContainer,
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const nsIntRect *aDirtyRect)
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{
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if (!mFrame)
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return NS_ERROR_FAILURE;
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if (!mRequest) {
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// We're in the middle of a paint anyway
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return NS_OK;
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}
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nsRect r = aDirtyRect->IsEqualInterior(nsIntRect::GetMaxSizedIntRect()) ?
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nsRect(nsPoint(0, 0), mFrame->GetSize()) :
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aDirtyRect->ToAppUnits(nsPresContext::AppUnitsPerCSSPixel());
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DoRedraw(&r);
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return NS_OK;
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}
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void
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nsImageLoader::DoReflow()
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{
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nsIPresShell *shell = mFrame->PresContext()->GetPresShell();
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shell->FrameNeedsReflow(mFrame, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
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}
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void
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nsImageLoader::DoRedraw(const nsRect* aDamageRect)
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{
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// NOTE: It is not sufficient to invalidate only the size of the image:
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// the image may be tiled!
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// The best option is to call into the frame, however lacking this
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// we have to at least invalidate the frame's bounds, hence
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// as long as we have a frame we'll use its size.
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//
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// Invalidate the entire frame
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// XXX We really only need to invalidate the client area of the frame...
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nsRect bounds(nsPoint(0, 0), mFrame->GetSize());
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if (mFrame->GetType() == nsGkAtoms::canvasFrame) {
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// The canvas's background covers the whole viewport.
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bounds = mFrame->GetVisualOverflowRect();
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}
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// XXX this should be ok, but there is some crappy ass bug causing it not to work
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// XXX seems related to the "body fixup rule" dealing with the canvas and body frames...
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#if 0
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// Invalidate the entire frame only if the frame has a tiled background
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// image, otherwise just invalidate the intersection of the frame's bounds
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// with the damaged rect.
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nsStyleContext* styleContext;
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mFrame->GetStyleContext(&styleContext);
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const nsStyleBackground* bg = styleContext->GetStyleBackground();
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if ((bg->mBackgroundFlags & NS_STYLE_BG_IMAGE_NONE) ||
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(bg->mBackgroundRepeat == NS_STYLE_BG_REPEAT_OFF)) {
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// The frame does not have a background image so we are free
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// to invalidate only the intersection of the damage rect and
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// the frame's bounds.
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if (aDamageRect) {
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bounds.IntersectRect(*aDamageRect, bounds);
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}
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}
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#endif
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if (mFrame->GetStyleVisibility()->IsVisible()) {
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mFrame->Invalidate(bounds);
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}
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}
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