зеркало из https://github.com/mozilla/pjs.git
2094 строки
67 KiB
C++
2094 строки
67 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
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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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/* rendering object for replaced elements with bitmap image data */
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#include "mozilla/Util.h"
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#include "nsHTMLParts.h"
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#include "nsCOMPtr.h"
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#include "nsImageFrame.h"
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#include "nsIImageLoadingContent.h"
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#include "nsString.h"
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#include "nsPrintfCString.h"
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#include "nsPresContext.h"
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#include "nsRenderingContext.h"
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#include "nsIPresShell.h"
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#include "nsGkAtoms.h"
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#include "nsIDocument.h"
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#include "nsINodeInfo.h"
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#include "nsContentUtils.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsStyleCoord.h"
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#include "nsTransform2D.h"
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#include "nsImageMap.h"
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#include "nsILinkHandler.h"
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#include "nsIURL.h"
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#include "nsIIOService.h"
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#include "nsIURL.h"
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#include "nsILoadGroup.h"
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#include "nsISupportsPriority.h"
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#include "nsIServiceManager.h"
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#include "nsNetUtil.h"
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#include "nsContainerFrame.h"
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#include "prprf.h"
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#include "nsCSSRendering.h"
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#include "nsILink.h"
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#include "nsIDOMHTMLAnchorElement.h"
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#include "nsIDOMHTMLImageElement.h"
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#include "nsINameSpaceManager.h"
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#include "nsTextFragment.h"
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#include "nsIDOMHTMLMapElement.h"
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#include "nsIScriptSecurityManager.h"
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#ifdef ACCESSIBILITY
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#include "nsAccessibilityService.h"
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#endif
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#include "nsIServiceManager.h"
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#include "nsIDOMNode.h"
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#include "nsGUIEvent.h"
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#include "nsLayoutUtils.h"
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#include "nsDisplayList.h"
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#include "imgIContainer.h"
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#include "imgILoader.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsIDOMRange.h"
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#include "nsIContentPolicy.h"
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#include "nsContentPolicyUtils.h"
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#include "nsEventStates.h"
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#include "nsLayoutErrors.h"
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#include "nsBidiUtils.h"
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#include "nsBidiPresUtils.h"
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#include "gfxRect.h"
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#include "ImageLayers.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Util.h" // for DebugOnly
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using namespace mozilla;
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// sizes (pixels) for image icon, padding and border frame
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#define ICON_SIZE (16)
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#define ICON_PADDING (3)
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#define ALT_BORDER_WIDTH (1)
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//we must add hooks soon
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#define IMAGE_EDITOR_CHECK 1
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// Default alignment value (so we can tell an unset value from a set value)
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#define ALIGN_UNSET PRUint8(-1)
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using namespace mozilla::layers;
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using namespace mozilla::dom;
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// static icon information
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nsImageFrame::IconLoad* nsImageFrame::gIconLoad = nsnull;
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// cached IO service for loading icons
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nsIIOService* nsImageFrame::sIOService;
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// test if the width and height are fixed, looking at the style data
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static bool HaveFixedSize(const nsStylePosition* aStylePosition)
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{
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// check the width and height values in the reflow state's style struct
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// - if width and height are specified as either coord or percentage, then
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// the size of the image frame is constrained
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return aStylePosition->mWidth.IsCoordPercentCalcUnit() &&
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aStylePosition->mHeight.IsCoordPercentCalcUnit();
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}
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// use the data in the reflow state to decide if the image has a constrained size
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// (i.e. width and height that are based on the containing block size and not the image size)
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// so we can avoid animated GIF related reflows
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inline bool HaveFixedSize(const nsHTMLReflowState& aReflowState)
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{
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NS_ASSERTION(aReflowState.mStylePosition, "crappy reflowState - null stylePosition");
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// when an image has percent css style height or width, but ComputedHeight()
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// or ComputedWidth() of reflow state is NS_UNCONSTRAINEDSIZE
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// it needs to return false to cause an incremental reflow later
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// if an image is inside table like bug 156731 simple testcase III,
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// during pass 1 reflow, ComputedWidth() is NS_UNCONSTRAINEDSIZE
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// in pass 2 reflow, ComputedWidth() is 0, it also needs to return false
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// see bug 156731
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const nsStyleCoord &height = aReflowState.mStylePosition->mHeight;
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const nsStyleCoord &width = aReflowState.mStylePosition->mWidth;
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return ((height.HasPercent() &&
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NS_UNCONSTRAINEDSIZE == aReflowState.ComputedHeight()) ||
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(width.HasPercent() &&
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(NS_UNCONSTRAINEDSIZE == aReflowState.ComputedWidth() ||
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0 == aReflowState.ComputedWidth())))
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? false
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: HaveFixedSize(aReflowState.mStylePosition);
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}
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nsIFrame*
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NS_NewImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsImageFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsImageFrame)
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nsImageFrame::nsImageFrame(nsStyleContext* aContext) :
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ImageFrameSuper(aContext),
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mComputedSize(0, 0),
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mIntrinsicRatio(0, 0),
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mDisplayingIcon(false)
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{
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// We assume our size is not constrained and we haven't gotten an
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// initial reflow yet, so don't touch those flags.
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mIntrinsicSize.width.SetCoordValue(0);
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mIntrinsicSize.height.SetCoordValue(0);
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}
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nsImageFrame::~nsImageFrame()
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{
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}
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NS_QUERYFRAME_HEAD(nsImageFrame)
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NS_QUERYFRAME_ENTRY(nsImageFrame)
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NS_QUERYFRAME_TAIL_INHERITING(ImageFrameSuper)
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#ifdef ACCESSIBILITY
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already_AddRefed<nsAccessible>
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nsImageFrame::CreateAccessible()
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{
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nsAccessibilityService* accService = nsIPresShell::AccService();
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if (accService) {
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return accService->CreateHTMLImageAccessible(mContent,
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PresContext()->PresShell());
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}
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return nsnull;
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}
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#endif
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void
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nsImageFrame::DisconnectMap()
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{
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if (mImageMap) {
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mImageMap->Destroy();
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NS_RELEASE(mImageMap);
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}
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}
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void
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nsImageFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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// Tell our image map, if there is one, to clean up
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// This causes the nsImageMap to unregister itself as
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// a DOM listener.
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DisconnectMap();
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// set the frame to null so we don't send messages to a dead object.
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if (mListener) {
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
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if (imageLoader) {
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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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// Notify our image loading content that we are going away so it can
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// deregister with our refresh driver.
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imageLoader->FrameDestroyed(this);
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imageLoader->RemoveObserver(mListener);
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}
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reinterpret_cast<nsImageListener*>(mListener.get())->SetFrame(nsnull);
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}
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mListener = nsnull;
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// If we were displaying an icon, take ourselves off the list
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if (mDisplayingIcon)
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gIconLoad->RemoveIconObserver(this);
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nsSplittableFrame::DestroyFrom(aDestructRoot);
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}
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NS_IMETHODIMP
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nsImageFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsSplittableFrame::Init(aContent, aParent, aPrevInFlow);
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NS_ENSURE_SUCCESS(rv, rv);
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mListener = new nsImageListener(this);
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(aContent);
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NS_ENSURE_TRUE(imageLoader, NS_ERROR_UNEXPECTED);
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{
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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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imageLoader->AddObserver(mListener);
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}
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nsPresContext *aPresContext = PresContext();
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if (!gIconLoad)
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LoadIcons(aPresContext);
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// We have a PresContext now, so we need to notify the image content node
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// that it can register images.
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imageLoader->FrameCreated(this);
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// Give image loads associated with an image frame a small priority boost!
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nsCOMPtr<imgIRequest> currentRequest;
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imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(currentRequest));
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nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(currentRequest);
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if (p)
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p->AdjustPriority(-1);
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// If we already have an image container, OnStartContainer won't be called
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// Set the animation mode here
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if (currentRequest) {
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nsCOMPtr<imgIContainer> image;
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currentRequest->GetImage(getter_AddRefs(image));
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if (image) {
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image->SetAnimationMode(aPresContext->ImageAnimationMode());
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}
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}
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return rv;
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}
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bool
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nsImageFrame::UpdateIntrinsicSize(imgIContainer* aImage)
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{
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NS_PRECONDITION(aImage, "null image");
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if (!aImage)
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return false;
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nsIFrame::IntrinsicSize oldIntrinsicSize = mIntrinsicSize;
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nsIFrame* rootFrame = aImage->GetRootLayoutFrame();
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if (rootFrame) {
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// Set intrinsic size to match that of aImage's rootFrame.
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mIntrinsicSize = rootFrame->GetIntrinsicSize();
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} else {
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// Set intrinsic size to match aImage's reported width & height.
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nsIntSize imageSizeInPx;
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if (NS_FAILED(aImage->GetWidth(&imageSizeInPx.width)) ||
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NS_FAILED(aImage->GetHeight(&imageSizeInPx.height))) {
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imageSizeInPx.SizeTo(0, 0);
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}
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mIntrinsicSize.width.SetCoordValue(
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nsPresContext::CSSPixelsToAppUnits(imageSizeInPx.width));
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mIntrinsicSize.height.SetCoordValue(
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nsPresContext::CSSPixelsToAppUnits(imageSizeInPx.height));
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}
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return mIntrinsicSize != oldIntrinsicSize;
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}
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bool
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nsImageFrame::UpdateIntrinsicRatio(imgIContainer* aImage)
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{
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NS_PRECONDITION(aImage, "null image");
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if (!aImage)
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return false;
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nsSize oldIntrinsicRatio = mIntrinsicRatio;
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nsIFrame* rootFrame = aImage->GetRootLayoutFrame();
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if (rootFrame) {
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// Set intrinsic ratio to match that of aImage's rootFrame.
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mIntrinsicRatio = rootFrame->GetIntrinsicRatio();
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} else {
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NS_ABORT_IF_FALSE(mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord &&
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mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord,
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"since aImage doesn't have a rootFrame, our intrinsic "
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"dimensions must have coord units (not percent units)");
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mIntrinsicRatio.width = mIntrinsicSize.width.GetCoordValue();
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mIntrinsicRatio.height = mIntrinsicSize.height.GetCoordValue();
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}
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return mIntrinsicRatio != oldIntrinsicRatio;
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}
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bool
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nsImageFrame::GetSourceToDestTransform(nsTransform2D& aTransform)
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{
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// Set the translation components.
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// XXXbz does this introduce rounding errors because of the cast to
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// float? Should we just manually add that stuff in every time
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// instead?
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nsRect innerArea = GetInnerArea();
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aTransform.SetToTranslate(float(innerArea.x),
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float(innerArea.y - GetContinuationOffset()));
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// Set the scale factors.
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if (mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord &&
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mIntrinsicSize.width.GetCoordValue() != 0 &&
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mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord &&
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mIntrinsicSize.height.GetCoordValue() != 0 &&
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mIntrinsicSize.width.GetCoordValue() != mComputedSize.width &&
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mIntrinsicSize.height.GetCoordValue() != mComputedSize.height) {
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aTransform.SetScale(float(mComputedSize.width) /
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float(mIntrinsicSize.width.GetCoordValue()),
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float(mComputedSize.height) /
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float(mIntrinsicSize.height.GetCoordValue()));
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return true;
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}
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return false;
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}
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/*
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* These two functions basically do the same check. The first one
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* checks that the given request is the current request for our
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* mContent. The second checks that the given image container the
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* same as the image container on the current request for our
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* mContent.
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*/
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bool
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nsImageFrame::IsPendingLoad(imgIRequest* aRequest) const
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{
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// Default to pending load in case of errors
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nsCOMPtr<nsIImageLoadingContent> imageLoader(do_QueryInterface(mContent));
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NS_ASSERTION(imageLoader, "No image loading content?");
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PRInt32 requestType = nsIImageLoadingContent::UNKNOWN_REQUEST;
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imageLoader->GetRequestType(aRequest, &requestType);
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return requestType != nsIImageLoadingContent::CURRENT_REQUEST;
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}
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bool
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nsImageFrame::IsPendingLoad(imgIContainer* aContainer) const
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{
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// default to pending load in case of errors
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if (!aContainer) {
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NS_ERROR("No image container!");
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return true;
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}
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nsCOMPtr<nsIImageLoadingContent> imageLoader(do_QueryInterface(mContent));
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NS_ASSERTION(imageLoader, "No image loading content?");
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nsCOMPtr<imgIRequest> currentRequest;
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imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(currentRequest));
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if (!currentRequest) {
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NS_ERROR("No current request");
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return true;
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}
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nsCOMPtr<imgIContainer> currentContainer;
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currentRequest->GetImage(getter_AddRefs(currentContainer));
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return currentContainer != aContainer;
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}
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nsRect
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nsImageFrame::SourceRectToDest(const nsIntRect& aRect)
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{
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// When scaling the image, row N of the source image may (depending on
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// the scaling function) be used to draw any row in the destination image
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// between floor(F * (N-1)) and ceil(F * (N+1)), where F is the
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// floating-point scaling factor. The same holds true for columns.
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// So, we start by computing that bound without the floor and ceiling.
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nsRect r(nsPresContext::CSSPixelsToAppUnits(aRect.x - 1),
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nsPresContext::CSSPixelsToAppUnits(aRect.y - 1),
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nsPresContext::CSSPixelsToAppUnits(aRect.width + 2),
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nsPresContext::CSSPixelsToAppUnits(aRect.height + 2));
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nsTransform2D sourceToDest;
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if (!GetSourceToDestTransform(sourceToDest)) {
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// Failed to generate transform matrix. Return our whole inner area,
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// to be on the safe side (since this method is used for generating
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// invalidation rects).
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return GetInnerArea();
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}
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sourceToDest.TransformCoord(&r.x, &r.y, &r.width, &r.height);
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// Now, round the edges out to the pixel boundary.
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nscoord scale = nsPresContext::CSSPixelsToAppUnits(1);
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nscoord right = r.x + r.width;
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nscoord bottom = r.y + r.height;
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r.x -= (scale + (r.x % scale)) % scale;
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r.y -= (scale + (r.y % scale)) % scale;
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r.width = right + ((scale - (right % scale)) % scale) - r.x;
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r.height = bottom + ((scale - (bottom % scale)) % scale) - r.y;
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return r;
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}
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// Note that we treat NS_EVENT_STATE_SUPPRESSED images as "OK". This means
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// that we'll construct image frames for them as needed if their display is
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// toggled from "none" (though we won't paint them, unless their visibility
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// is changed too).
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#define BAD_STATES (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | \
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NS_EVENT_STATE_LOADING)
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// This is a macro so that we don't evaluate the boolean last arg
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// unless we have to; it can be expensive
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#define IMAGE_OK(_state, _loadingOK) \
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(!(_state).HasAtLeastOneOfStates(BAD_STATES) || \
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(!(_state).HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED) && \
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(_state).HasState(NS_EVENT_STATE_LOADING) && (_loadingOK)))
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/* static */
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bool
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nsImageFrame::ShouldCreateImageFrameFor(Element* aElement,
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nsStyleContext* aStyleContext)
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{
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|
nsEventStates state = aElement->State();
|
|
if (IMAGE_OK(state,
|
|
HaveFixedSize(aStyleContext->GetStylePosition()))) {
|
|
// Image is fine; do the image frame thing
|
|
return true;
|
|
}
|
|
|
|
// Check if we want to use a placeholder box with an icon or just
|
|
// let the presShell make us into inline text. Decide as follows:
|
|
//
|
|
// - if our special "force icons" style is set, show an icon
|
|
// - else if our "do not show placeholders" pref is set, skip the icon
|
|
// - else:
|
|
// - if QuirksMode, and there is no alt attribute, and this is not an
|
|
// <object> (which could not possibly have such an attribute), show an
|
|
// icon.
|
|
// - if QuirksMode, and the IMG has a size show an icon.
|
|
// - otherwise, skip the icon
|
|
bool useSizedBox;
|
|
|
|
if (aStyleContext->GetStyleUIReset()->mForceBrokenImageIcon) {
|
|
useSizedBox = true;
|
|
}
|
|
else if (gIconLoad && gIconLoad->mPrefForceInlineAltText) {
|
|
useSizedBox = false;
|
|
}
|
|
else {
|
|
if (aStyleContext->PresContext()->CompatibilityMode() !=
|
|
eCompatibility_NavQuirks) {
|
|
useSizedBox = false;
|
|
}
|
|
else {
|
|
// We are in quirks mode, so we can just check the tag name; no need to
|
|
// check the namespace.
|
|
nsIAtom *localName = aElement->Tag();
|
|
|
|
// Use a sized box if we have no alt text. This means no alt attribute
|
|
// and the node is not an object or an input (since those always have alt
|
|
// text).
|
|
if (!aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::alt) &&
|
|
localName != nsGkAtoms::object &&
|
|
localName != nsGkAtoms::input) {
|
|
useSizedBox = true;
|
|
}
|
|
else {
|
|
// check whether we have fixed size
|
|
useSizedBox = HaveFixedSize(aStyleContext->GetStylePosition());
|
|
}
|
|
}
|
|
}
|
|
|
|
return useSizedBox;
|
|
}
|
|
|
|
nsresult
|
|
nsImageFrame::OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage)
|
|
{
|
|
if (!aImage) return NS_ERROR_INVALID_ARG;
|
|
|
|
/* Get requested animation policy from the pres context:
|
|
* normal = 0
|
|
* one frame = 1
|
|
* one loop = 2
|
|
*/
|
|
nsPresContext *presContext = PresContext();
|
|
aImage->SetAnimationMode(presContext->ImageAnimationMode());
|
|
|
|
if (IsPendingLoad(aRequest)) {
|
|
// We don't care
|
|
return NS_OK;
|
|
}
|
|
|
|
bool intrinsicSizeChanged = UpdateIntrinsicSize(aImage);
|
|
intrinsicSizeChanged = UpdateIntrinsicRatio(aImage) || intrinsicSizeChanged;
|
|
|
|
if (intrinsicSizeChanged && (mState & IMAGE_GOTINITIALREFLOW)) {
|
|
// Now we need to reflow if we have an unconstrained size and have
|
|
// already gotten the initial reflow
|
|
if (!(mState & IMAGE_SIZECONSTRAINED)) {
|
|
nsIPresShell *presShell = presContext->GetPresShell();
|
|
NS_ASSERTION(presShell, "No PresShell.");
|
|
if (presShell) {
|
|
presShell->FrameNeedsReflow(this, nsIPresShell::eStyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsImageFrame::OnDataAvailable(imgIRequest *aRequest,
|
|
bool aCurrentFrame,
|
|
const nsIntRect *aRect)
|
|
{
|
|
// XXX do we need to make sure that the reflow from the
|
|
// OnStartContainer has been processed before we start calling
|
|
// invalidate?
|
|
|
|
NS_ENSURE_ARG_POINTER(aRect);
|
|
|
|
if (!(mState & IMAGE_GOTINITIALREFLOW)) {
|
|
// Don't bother to do anything; we have a reflow coming up!
|
|
return NS_OK;
|
|
}
|
|
|
|
if (IsPendingLoad(aRequest)) {
|
|
// We don't care
|
|
return NS_OK;
|
|
}
|
|
|
|
// Don't invalidate if the current visible frame isn't the one the data is
|
|
// from
|
|
if (!aCurrentFrame)
|
|
return NS_OK;
|
|
|
|
// XXX We really need to round this out, now that we're doing better
|
|
// image scaling!
|
|
nsRect r = aRect->IsEqualInterior(nsIntRect::GetMaxSizedIntRect()) ?
|
|
GetInnerArea() :
|
|
SourceRectToDest(*aRect);
|
|
|
|
#ifdef DEBUG_decode
|
|
printf("Source rect (%d,%d,%d,%d) -> invalidate dest rect (%d,%d,%d,%d)\n",
|
|
aRect->x, aRect->y, aRect->width, aRect->height,
|
|
r.x, r.y, r.width, r.height);
|
|
#endif
|
|
|
|
Invalidate(r);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsImageFrame::OnStopDecode(imgIRequest *aRequest,
|
|
nsresult aStatus,
|
|
const PRUnichar *aStatusArg)
|
|
{
|
|
nsPresContext *presContext = PresContext();
|
|
nsIPresShell *presShell = presContext->GetPresShell();
|
|
NS_ASSERTION(presShell, "No PresShell.");
|
|
|
|
// Check what request type we're dealing with
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
NS_ASSERTION(imageLoader, "Who's notifying us??");
|
|
PRInt32 loadType = nsIImageLoadingContent::UNKNOWN_REQUEST;
|
|
imageLoader->GetRequestType(aRequest, &loadType);
|
|
if (loadType != nsIImageLoadingContent::CURRENT_REQUEST &&
|
|
loadType != nsIImageLoadingContent::PENDING_REQUEST) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (loadType == nsIImageLoadingContent::PENDING_REQUEST) {
|
|
// May have to switch sizes here!
|
|
bool intrinsicSizeChanged = true;
|
|
if (NS_SUCCEEDED(aStatus)) {
|
|
nsCOMPtr<imgIContainer> imageContainer;
|
|
aRequest->GetImage(getter_AddRefs(imageContainer));
|
|
NS_ASSERTION(imageContainer, "Successful load with no container?");
|
|
intrinsicSizeChanged = UpdateIntrinsicSize(imageContainer);
|
|
intrinsicSizeChanged = UpdateIntrinsicRatio(imageContainer) ||
|
|
intrinsicSizeChanged;
|
|
}
|
|
else {
|
|
// Have to size to 0,0 so that GetDesiredSize recalculates the size
|
|
mIntrinsicSize.width.SetCoordValue(0);
|
|
mIntrinsicSize.height.SetCoordValue(0);
|
|
mIntrinsicRatio.SizeTo(0, 0);
|
|
}
|
|
|
|
if (mState & IMAGE_GOTINITIALREFLOW) { // do nothing if we haven't gotten the initial reflow yet
|
|
if (!(mState & IMAGE_SIZECONSTRAINED) && intrinsicSizeChanged) {
|
|
if (presShell) {
|
|
presShell->FrameNeedsReflow(this, nsIPresShell::eStyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
}
|
|
} else {
|
|
nsSize s = GetSize();
|
|
nsRect r(0, 0, s.width, s.height);
|
|
// Update border+content to account for image change
|
|
Invalidate(r);
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsImageFrame::FrameChanged(imgIRequest *aRequest,
|
|
imgIContainer *aContainer,
|
|
const nsIntRect *aDirtyRect)
|
|
{
|
|
if (!GetStyleVisibility()->IsVisible()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (IsPendingLoad(aContainer)) {
|
|
// We don't care about it
|
|
return NS_OK;
|
|
}
|
|
|
|
nsRect r = aDirtyRect->IsEqualInterior(nsIntRect::GetMaxSizedIntRect()) ?
|
|
GetInnerArea() :
|
|
SourceRectToDest(*aDirtyRect);
|
|
|
|
// Update border+content to account for image change
|
|
Invalidate(r);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsImageFrame::EnsureIntrinsicSizeAndRatio(nsPresContext* aPresContext)
|
|
{
|
|
// if mIntrinsicSize.width and height are 0, then we should
|
|
// check to see if the size is already known by the image container.
|
|
if (mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord &&
|
|
mIntrinsicSize.width.GetCoordValue() == 0 &&
|
|
mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord &&
|
|
mIntrinsicSize.height.GetCoordValue() == 0) {
|
|
|
|
// Jump through all the hoops to get the status of the request
|
|
nsCOMPtr<imgIRequest> currentRequest;
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
if (imageLoader)
|
|
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(currentRequest));
|
|
PRUint32 status = 0;
|
|
if (currentRequest)
|
|
currentRequest->GetImageStatus(&status);
|
|
|
|
// If we know the size, we can grab it and use it for an update
|
|
if (status & imgIRequest::STATUS_SIZE_AVAILABLE) {
|
|
nsCOMPtr<imgIContainer> imgCon;
|
|
currentRequest->GetImage(getter_AddRefs(imgCon));
|
|
NS_ABORT_IF_FALSE(imgCon, "SIZE_AVAILABLE, but no imgContainer?");
|
|
UpdateIntrinsicSize(imgCon);
|
|
UpdateIntrinsicRatio(imgCon);
|
|
} else {
|
|
// image request is null or image size not known, probably an
|
|
// invalid image specified
|
|
// - make the image big enough for the icon (it may not be
|
|
// used if inline alt expansion is used instead)
|
|
// XXX: we need this in composer, but it is also good for
|
|
// XXX: general quirks mode to always have room for the icon
|
|
if (aPresContext->CompatibilityMode() == eCompatibility_NavQuirks) {
|
|
nscoord edgeLengthToUse =
|
|
nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + (2 * (ICON_PADDING + ALT_BORDER_WIDTH)));
|
|
mIntrinsicSize.width.SetCoordValue(edgeLengthToUse);
|
|
mIntrinsicSize.height.SetCoordValue(edgeLengthToUse);
|
|
mIntrinsicRatio.SizeTo(1, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* virtual */ nsSize
|
|
nsImageFrame::ComputeSize(nsRenderingContext *aRenderingContext,
|
|
nsSize aCBSize, nscoord aAvailableWidth,
|
|
nsSize aMargin, nsSize aBorder, nsSize aPadding,
|
|
bool aShrinkWrap)
|
|
{
|
|
nsPresContext *presContext = PresContext();
|
|
EnsureIntrinsicSizeAndRatio(presContext);
|
|
|
|
return nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(
|
|
aRenderingContext, this,
|
|
mIntrinsicSize, mIntrinsicRatio, aCBSize,
|
|
aMargin, aBorder, aPadding);
|
|
}
|
|
|
|
nsRect
|
|
nsImageFrame::GetInnerArea() const
|
|
{
|
|
return GetContentRect() - GetPosition();
|
|
}
|
|
|
|
// get the offset into the content area of the image where aImg starts if it is a continuation.
|
|
nscoord
|
|
nsImageFrame::GetContinuationOffset() const
|
|
{
|
|
nscoord offset = 0;
|
|
for (nsIFrame *f = GetPrevInFlow(); f; f = f->GetPrevInFlow()) {
|
|
offset += f->GetContentRect().height;
|
|
}
|
|
NS_ASSERTION(offset >= 0, "bogus GetContentRect");
|
|
return offset;
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsImageFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
// XXX The caller doesn't account for constraints of the height,
|
|
// min-height, and max-height properties.
|
|
DebugOnly<nscoord> result;
|
|
DISPLAY_MIN_WIDTH(this, result);
|
|
nsPresContext *presContext = PresContext();
|
|
EnsureIntrinsicSizeAndRatio(presContext);
|
|
return mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord ?
|
|
mIntrinsicSize.width.GetCoordValue() : 0;
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsImageFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
// XXX The caller doesn't account for constraints of the height,
|
|
// min-height, and max-height properties.
|
|
DebugOnly<nscoord> result;
|
|
DISPLAY_PREF_WIDTH(this, result);
|
|
nsPresContext *presContext = PresContext();
|
|
EnsureIntrinsicSizeAndRatio(presContext);
|
|
// convert from normal twips to scaled twips (printing...)
|
|
return mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord ?
|
|
mIntrinsicSize.width.GetCoordValue() : 0;
|
|
}
|
|
|
|
/* virtual */ nsIFrame::IntrinsicSize
|
|
nsImageFrame::GetIntrinsicSize()
|
|
{
|
|
return mIntrinsicSize;
|
|
}
|
|
|
|
/* virtual */ nsSize
|
|
nsImageFrame::GetIntrinsicRatio()
|
|
{
|
|
return mIntrinsicRatio;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsImageFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
|
|
("enter nsImageFrame::Reflow: availSize=%d,%d",
|
|
aReflowState.availableWidth, aReflowState.availableHeight));
|
|
|
|
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
|
|
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
|
|
// see if we have a frozen size (i.e. a fixed width and height)
|
|
if (HaveFixedSize(aReflowState)) {
|
|
mState |= IMAGE_SIZECONSTRAINED;
|
|
} else {
|
|
mState &= ~IMAGE_SIZECONSTRAINED;
|
|
}
|
|
|
|
// XXXldb These two bits are almost exact opposites (except in the
|
|
// middle of the initial reflow); remove IMAGE_GOTINITIALREFLOW.
|
|
if (GetStateBits() & NS_FRAME_FIRST_REFLOW) {
|
|
mState |= IMAGE_GOTINITIALREFLOW;
|
|
}
|
|
|
|
mComputedSize =
|
|
nsSize(aReflowState.ComputedWidth(), aReflowState.ComputedHeight());
|
|
|
|
aMetrics.width = mComputedSize.width;
|
|
aMetrics.height = mComputedSize.height;
|
|
|
|
// add borders and padding
|
|
aMetrics.width += aReflowState.mComputedBorderPadding.LeftRight();
|
|
aMetrics.height += aReflowState.mComputedBorderPadding.TopBottom();
|
|
|
|
if (GetPrevInFlow()) {
|
|
aMetrics.width = GetPrevInFlow()->GetSize().width;
|
|
nscoord y = GetContinuationOffset();
|
|
aMetrics.height -= y + aReflowState.mComputedBorderPadding.top;
|
|
aMetrics.height = NS_MAX(0, aMetrics.height);
|
|
}
|
|
|
|
|
|
// we have to split images if we are:
|
|
// in Paginated mode, we need to have a constrained height, and have a height larger than our available height
|
|
PRUint32 loadStatus = imgIRequest::STATUS_NONE;
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
NS_ASSERTION(imageLoader, "No content node??");
|
|
if (imageLoader) {
|
|
nsCOMPtr<imgIRequest> currentRequest;
|
|
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(currentRequest));
|
|
if (currentRequest) {
|
|
currentRequest->GetImageStatus(&loadStatus);
|
|
}
|
|
}
|
|
if (aPresContext->IsPaginated() &&
|
|
((loadStatus & imgIRequest::STATUS_SIZE_AVAILABLE) || (mState & IMAGE_SIZECONSTRAINED)) &&
|
|
NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight &&
|
|
aMetrics.height > aReflowState.availableHeight) {
|
|
// our desired height was greater than 0, so to avoid infinite
|
|
// splitting, use 1 pixel as the min
|
|
aMetrics.height = NS_MAX(nsPresContext::CSSPixelsToAppUnits(1), aReflowState.availableHeight);
|
|
aStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
|
|
aMetrics.SetOverflowAreasToDesiredBounds();
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
|
|
// Now that that's all done, check whether we're resizing... if we are,
|
|
// invalidate our rect.
|
|
// XXXbz we really only want to do this when reflow is completely done, but
|
|
// we have no way to detect when mRect changes (since SetRect is non-virtual,
|
|
// so this is the best we can do).
|
|
if (mRect.width != aMetrics.width || mRect.height != aMetrics.height) {
|
|
Invalidate(nsRect(0, 0, mRect.width, mRect.height));
|
|
}
|
|
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
|
|
("exit nsImageFrame::Reflow: size=%d,%d",
|
|
aMetrics.width, aMetrics.height));
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Computes the width of the specified string. aMaxWidth specifies the maximum
|
|
// width available. Once this limit is reached no more characters are measured.
|
|
// The number of characters that fit within the maximum width are returned in
|
|
// aMaxFit. NOTE: it is assumed that the fontmetrics have already been selected
|
|
// into the rendering context before this is called (for performance). MMP
|
|
nscoord
|
|
nsImageFrame::MeasureString(const PRUnichar* aString,
|
|
PRInt32 aLength,
|
|
nscoord aMaxWidth,
|
|
PRUint32& aMaxFit,
|
|
nsRenderingContext& aContext)
|
|
{
|
|
nscoord totalWidth = 0;
|
|
aContext.SetTextRunRTL(false);
|
|
nscoord spaceWidth = aContext.GetWidth(' ');
|
|
|
|
aMaxFit = 0;
|
|
while (aLength > 0) {
|
|
// Find the next place we can line break
|
|
PRUint32 len = aLength;
|
|
bool trailingSpace = false;
|
|
for (PRInt32 i = 0; i < aLength; i++) {
|
|
if (XP_IS_SPACE(aString[i]) && (i > 0)) {
|
|
len = i; // don't include the space when measuring
|
|
trailingSpace = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Measure this chunk of text, and see if it fits
|
|
nscoord width =
|
|
nsLayoutUtils::GetStringWidth(this, &aContext, aString, len);
|
|
bool fits = (totalWidth + width) <= aMaxWidth;
|
|
|
|
// If it fits on the line, or it's the first word we've processed then
|
|
// include it
|
|
if (fits || (0 == totalWidth)) {
|
|
// New piece fits
|
|
totalWidth += width;
|
|
|
|
// If there's a trailing space then see if it fits as well
|
|
if (trailingSpace) {
|
|
if ((totalWidth + spaceWidth) <= aMaxWidth) {
|
|
totalWidth += spaceWidth;
|
|
} else {
|
|
// Space won't fit. Leave it at the end but don't include it in
|
|
// the width
|
|
fits = false;
|
|
}
|
|
|
|
len++;
|
|
}
|
|
|
|
aMaxFit += len;
|
|
aString += len;
|
|
aLength -= len;
|
|
}
|
|
|
|
if (!fits) {
|
|
break;
|
|
}
|
|
}
|
|
return totalWidth;
|
|
}
|
|
|
|
// Formats the alt-text to fit within the specified rectangle. Breaks lines
|
|
// between words if a word would extend past the edge of the rectangle
|
|
void
|
|
nsImageFrame::DisplayAltText(nsPresContext* aPresContext,
|
|
nsRenderingContext& aRenderingContext,
|
|
const nsString& aAltText,
|
|
const nsRect& aRect)
|
|
{
|
|
// Set font and color
|
|
aRenderingContext.SetColor(GetStyleColor()->mColor);
|
|
nsRefPtr<nsFontMetrics> fm;
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
|
|
nsLayoutUtils::FontSizeInflationFor(this, nsLayoutUtils::eNotInReflow));
|
|
aRenderingContext.SetFont(fm);
|
|
|
|
// Format the text to display within the formatting rect
|
|
|
|
nscoord maxAscent = fm->MaxAscent();
|
|
nscoord maxDescent = fm->MaxDescent();
|
|
nscoord height = fm->MaxHeight();
|
|
|
|
// XXX It would be nice if there was a way to have the font metrics tell
|
|
// use where to break the text given a maximum width. At a minimum we need
|
|
// to be able to get the break character...
|
|
const PRUnichar* str = aAltText.get();
|
|
PRInt32 strLen = aAltText.Length();
|
|
nscoord y = aRect.y;
|
|
|
|
if (!aPresContext->BidiEnabled() && HasRTLChars(aAltText)) {
|
|
aPresContext->SetBidiEnabled();
|
|
}
|
|
|
|
// Always show the first line, even if we have to clip it below
|
|
bool firstLine = true;
|
|
while ((strLen > 0) && (firstLine || (y + maxDescent) < aRect.YMost())) {
|
|
// Determine how much of the text to display on this line
|
|
PRUint32 maxFit; // number of characters that fit
|
|
nscoord strWidth = MeasureString(str, strLen, aRect.width, maxFit,
|
|
aRenderingContext);
|
|
|
|
// Display the text
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
|
|
if (aPresContext->BidiEnabled()) {
|
|
const nsStyleVisibility* vis = GetStyleVisibility();
|
|
if (vis->mDirection == NS_STYLE_DIRECTION_RTL)
|
|
rv = nsBidiPresUtils::RenderText(str, maxFit, NSBIDI_RTL,
|
|
aPresContext, aRenderingContext,
|
|
aRenderingContext,
|
|
aRect.XMost() - strWidth, y + maxAscent);
|
|
else
|
|
rv = nsBidiPresUtils::RenderText(str, maxFit, NSBIDI_LTR,
|
|
aPresContext, aRenderingContext,
|
|
aRenderingContext,
|
|
aRect.x, y + maxAscent);
|
|
}
|
|
if (NS_FAILED(rv))
|
|
aRenderingContext.DrawString(str, maxFit, aRect.x, y + maxAscent);
|
|
|
|
// Move to the next line
|
|
str += maxFit;
|
|
strLen -= maxFit;
|
|
y += height;
|
|
firstLine = false;
|
|
}
|
|
}
|
|
|
|
struct nsRecessedBorder : public nsStyleBorder {
|
|
nsRecessedBorder(nscoord aBorderWidth, nsPresContext* aPresContext)
|
|
: nsStyleBorder(aPresContext)
|
|
{
|
|
NS_FOR_CSS_SIDES(side) {
|
|
// Note: use SetBorderColor here because we want to make sure
|
|
// the "special" flags are unset.
|
|
SetBorderColor(side, NS_RGB(0, 0, 0));
|
|
mBorder.Side(side) = aBorderWidth;
|
|
// Note: use SetBorderStyle here because we want to affect
|
|
// mComputedBorder
|
|
SetBorderStyle(side, NS_STYLE_BORDER_STYLE_INSET);
|
|
}
|
|
}
|
|
};
|
|
|
|
void
|
|
nsImageFrame::DisplayAltFeedback(nsRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
imgIRequest* aRequest,
|
|
nsPoint aPt)
|
|
{
|
|
// We should definitely have a gIconLoad here.
|
|
NS_ABORT_IF_FALSE(gIconLoad, "How did we succeed in Init then?");
|
|
|
|
// Calculate the inner area
|
|
nsRect inner = GetInnerArea() + aPt;
|
|
|
|
// Display a recessed one pixel border
|
|
nscoord borderEdgeWidth = nsPresContext::CSSPixelsToAppUnits(ALT_BORDER_WIDTH);
|
|
|
|
// if inner area is empty, then make it big enough for at least the icon
|
|
if (inner.IsEmpty()){
|
|
inner.SizeTo(2*(nsPresContext::CSSPixelsToAppUnits(ICON_SIZE+ICON_PADDING+ALT_BORDER_WIDTH)),
|
|
2*(nsPresContext::CSSPixelsToAppUnits(ICON_SIZE+ICON_PADDING+ALT_BORDER_WIDTH)));
|
|
}
|
|
|
|
// Make sure we have enough room to actually render the border within
|
|
// our frame bounds
|
|
if ((inner.width < 2 * borderEdgeWidth) || (inner.height < 2 * borderEdgeWidth)) {
|
|
return;
|
|
}
|
|
|
|
// Paint the border
|
|
nsRecessedBorder recessedBorder(borderEdgeWidth, PresContext());
|
|
nsCSSRendering::PaintBorderWithStyleBorder(PresContext(), aRenderingContext,
|
|
this, inner, inner,
|
|
recessedBorder, mStyleContext);
|
|
|
|
// Adjust the inner rect to account for the one pixel recessed border,
|
|
// and a six pixel padding on each edge
|
|
inner.Deflate(nsPresContext::CSSPixelsToAppUnits(ICON_PADDING+ALT_BORDER_WIDTH),
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING+ALT_BORDER_WIDTH));
|
|
if (inner.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Clip so we don't render outside the inner rect
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.IntersectClip(inner);
|
|
|
|
// Check if we should display image placeholders
|
|
if (gIconLoad->mPrefShowPlaceholders) {
|
|
const nsStyleVisibility* vis = GetStyleVisibility();
|
|
nscoord size = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE);
|
|
|
|
bool iconUsed = false;
|
|
|
|
// If we weren't previously displaying an icon, register ourselves
|
|
// as an observer for load and animation updates and flag that we're
|
|
// doing so now.
|
|
if (aRequest && !mDisplayingIcon) {
|
|
gIconLoad->AddIconObserver(this);
|
|
mDisplayingIcon = true;
|
|
}
|
|
|
|
|
|
// If the image in question is loaded and decoded, draw it
|
|
PRUint32 imageStatus = 0;
|
|
if (aRequest)
|
|
aRequest->GetImageStatus(&imageStatus);
|
|
if (imageStatus & imgIRequest::STATUS_FRAME_COMPLETE) {
|
|
nsCOMPtr<imgIContainer> imgCon;
|
|
aRequest->GetImage(getter_AddRefs(imgCon));
|
|
NS_ABORT_IF_FALSE(imgCon, "Frame Complete, but no image container?");
|
|
nsRect dest((vis->mDirection == NS_STYLE_DIRECTION_RTL) ?
|
|
inner.XMost() - size : inner.x,
|
|
inner.y, size, size);
|
|
nsLayoutUtils::DrawSingleImage(&aRenderingContext, imgCon,
|
|
nsLayoutUtils::GetGraphicsFilterForFrame(this), dest, aDirtyRect,
|
|
imgIContainer::FLAG_NONE);
|
|
iconUsed = true;
|
|
}
|
|
|
|
// if we could not draw the icon, flag that we're waiting for it and
|
|
// just draw some graffiti in the mean time
|
|
if (!iconUsed) {
|
|
nscoord iconXPos = (vis->mDirection == NS_STYLE_DIRECTION_RTL) ?
|
|
inner.XMost() - size : inner.x;
|
|
nscoord twoPX = nsPresContext::CSSPixelsToAppUnits(2);
|
|
aRenderingContext.DrawRect(iconXPos, inner.y,size,size);
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.SetColor(NS_RGB(0xFF,0,0));
|
|
aRenderingContext.FillEllipse(size/2 + iconXPos, size/2 + inner.y,
|
|
size/2 - twoPX, size/2 - twoPX);
|
|
aRenderingContext.PopState();
|
|
}
|
|
|
|
// Reduce the inner rect by the width of the icon, and leave an
|
|
// additional ICON_PADDING pixels for padding
|
|
PRInt32 iconWidth = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE + ICON_PADDING);
|
|
if (vis->mDirection != NS_STYLE_DIRECTION_RTL)
|
|
inner.x += iconWidth;
|
|
inner.width -= iconWidth;
|
|
}
|
|
|
|
// If there's still room, display the alt-text
|
|
if (!inner.IsEmpty()) {
|
|
nsIContent* content = GetContent();
|
|
if (content) {
|
|
nsXPIDLString altText;
|
|
nsCSSFrameConstructor::GetAlternateTextFor(content, content->Tag(),
|
|
altText);
|
|
DisplayAltText(PresContext(), aRenderingContext, altText, inner);
|
|
}
|
|
}
|
|
|
|
aRenderingContext.PopState();
|
|
}
|
|
|
|
static void PaintAltFeedback(nsIFrame* aFrame, nsRenderingContext* aCtx,
|
|
const nsRect& aDirtyRect, nsPoint aPt)
|
|
{
|
|
nsImageFrame* f = static_cast<nsImageFrame*>(aFrame);
|
|
nsEventStates state = f->GetContent()->AsElement()->State();
|
|
f->DisplayAltFeedback(*aCtx,
|
|
aDirtyRect,
|
|
IMAGE_OK(state, true)
|
|
? nsImageFrame::gIconLoad->mLoadingImage
|
|
: nsImageFrame::gIconLoad->mBrokenImage,
|
|
aPt);
|
|
}
|
|
|
|
#ifdef NS_DEBUG
|
|
static void PaintDebugImageMap(nsIFrame* aFrame, nsRenderingContext* aCtx,
|
|
const nsRect& aDirtyRect, nsPoint aPt) {
|
|
nsImageFrame* f = static_cast<nsImageFrame*>(aFrame);
|
|
nsRect inner = f->GetInnerArea() + aPt;
|
|
|
|
aCtx->SetColor(NS_RGB(0, 0, 0));
|
|
aCtx->PushState();
|
|
aCtx->Translate(inner.TopLeft());
|
|
f->GetImageMap()->Draw(aFrame, *aCtx);
|
|
aCtx->PopState();
|
|
}
|
|
#endif
|
|
|
|
void
|
|
nsDisplayImage::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
static_cast<nsImageFrame*>(mFrame)->
|
|
PaintImage(*aCtx, ToReferenceFrame(), mVisibleRect, mImage,
|
|
aBuilder->ShouldSyncDecodeImages()
|
|
? (PRUint32) imgIContainer::FLAG_SYNC_DECODE
|
|
: (PRUint32) imgIContainer::FLAG_NONE);
|
|
}
|
|
|
|
already_AddRefed<ImageContainer>
|
|
nsDisplayImage::GetContainer()
|
|
{
|
|
nsRefPtr<ImageContainer> container;
|
|
nsresult rv = mImage->GetImageContainer(getter_AddRefs(container));
|
|
NS_ENSURE_SUCCESS(rv, nsnull);
|
|
return container.forget();
|
|
}
|
|
|
|
void
|
|
nsDisplayImage::ConfigureLayer(ImageLayer* aLayer)
|
|
{
|
|
aLayer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(mFrame));
|
|
|
|
PRInt32 factor = mFrame->PresContext()->AppUnitsPerDevPixel();
|
|
nsImageFrame* imageFrame = static_cast<nsImageFrame*>(mFrame);
|
|
|
|
nsRect dest = imageFrame->GetInnerArea() + ToReferenceFrame();
|
|
gfxRect destRect(dest.x, dest.y, dest.width, dest.height);
|
|
destRect.ScaleInverse(factor);
|
|
|
|
PRInt32 imageWidth;
|
|
PRInt32 imageHeight;
|
|
mImage->GetWidth(&imageWidth);
|
|
mImage->GetHeight(&imageHeight);
|
|
|
|
gfxMatrix transform;
|
|
transform.Translate(destRect.TopLeft());
|
|
transform.Scale(destRect.Width()/imageWidth,
|
|
destRect.Height()/imageHeight);
|
|
aLayer->SetTransform(gfx3DMatrix::From2D(transform));
|
|
|
|
aLayer->SetVisibleRegion(nsIntRect(0, 0, imageWidth, imageHeight));
|
|
}
|
|
|
|
void
|
|
nsImageFrame::PaintImage(nsRenderingContext& aRenderingContext, nsPoint aPt,
|
|
const nsRect& aDirtyRect, imgIContainer* aImage,
|
|
PRUint32 aFlags)
|
|
{
|
|
// Render the image into our content area (the area inside
|
|
// the borders and padding)
|
|
NS_ASSERTION(GetInnerArea().width == mComputedSize.width, "bad width");
|
|
nsRect inner = GetInnerArea() + aPt;
|
|
nsRect dest(inner.TopLeft(), mComputedSize);
|
|
dest.y -= GetContinuationOffset();
|
|
|
|
nsLayoutUtils::DrawSingleImage(&aRenderingContext, aImage,
|
|
nsLayoutUtils::GetGraphicsFilterForFrame(this), dest, aDirtyRect,
|
|
aFlags);
|
|
|
|
nsImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
|
|
aRenderingContext.SetLineStyle(nsLineStyle_kDotted);
|
|
aRenderingContext.Translate(inner.TopLeft());
|
|
map->Draw(this, aRenderingContext);
|
|
aRenderingContext.PopState();
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists)
|
|
{
|
|
if (!IsVisibleForPainting(aBuilder))
|
|
return NS_OK;
|
|
|
|
// REVIEW: We don't need any special logic here for deciding which layer
|
|
// to put the background in ... it goes in aLists.BorderBackground() and
|
|
// then if we have a block parent, it will put our background in the right
|
|
// place.
|
|
nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// REVIEW: Checking mRect.IsEmpty() makes no sense to me, so I removed it.
|
|
// It can't have been protecting us against bad situations with zero-size
|
|
// images since adding a border would make the rect non-empty.
|
|
|
|
nsDisplayList replacedContent;
|
|
if (mComputedSize.width != 0 && mComputedSize.height != 0) {
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
NS_ASSERTION(imageLoader, "Not an image loading content?");
|
|
|
|
nsCOMPtr<imgIRequest> currentRequest;
|
|
if (imageLoader) {
|
|
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(currentRequest));
|
|
}
|
|
|
|
nsEventStates contentState = mContent->AsElement()->State();
|
|
bool imageOK = IMAGE_OK(contentState, true);
|
|
|
|
nsCOMPtr<imgIContainer> imgCon;
|
|
if (currentRequest) {
|
|
currentRequest->GetImage(getter_AddRefs(imgCon));
|
|
}
|
|
|
|
// Determine if the size is available
|
|
bool haveSize = false;
|
|
PRUint32 imageStatus = 0;
|
|
if (currentRequest)
|
|
currentRequest->GetImageStatus(&imageStatus);
|
|
if (imageStatus & imgIRequest::STATUS_SIZE_AVAILABLE)
|
|
haveSize = true;
|
|
|
|
// We should never have the size and not have an image container
|
|
NS_ABORT_IF_FALSE(!haveSize || imgCon, "Have size but not container?");
|
|
|
|
if (!imageOK || !haveSize) {
|
|
// No image yet, or image load failed. Draw the alt-text and an icon
|
|
// indicating the status
|
|
rv = replacedContent.AppendNewToTop(new (aBuilder)
|
|
nsDisplayGeneric(aBuilder, this, PaintAltFeedback, "AltFeedback",
|
|
nsDisplayItem::TYPE_ALT_FEEDBACK));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
else {
|
|
rv = replacedContent.AppendNewToTop(new (aBuilder)
|
|
nsDisplayImage(aBuilder, this, imgCon));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If we were previously displaying an icon, we're not anymore
|
|
if (mDisplayingIcon) {
|
|
gIconLoad->RemoveIconObserver(this);
|
|
mDisplayingIcon = false;
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
if (GetShowFrameBorders() && GetImageMap()) {
|
|
rv = aLists.Outlines()->AppendNewToTop(new (aBuilder)
|
|
nsDisplayGeneric(aBuilder, this, PaintDebugImageMap, "DebugImageMap",
|
|
nsDisplayItem::TYPE_DEBUG_IMAGE_MAP));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (ShouldDisplaySelection()) {
|
|
rv = DisplaySelectionOverlay(aBuilder, &replacedContent,
|
|
nsISelectionDisplay::DISPLAY_IMAGES);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
WrapReplacedContentForBorderRadius(aBuilder, &replacedContent, aLists);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsImageFrame::ShouldDisplaySelection()
|
|
{
|
|
// XXX what on EARTH is this code for?
|
|
nsresult result;
|
|
nsPresContext* presContext = PresContext();
|
|
PRInt16 displaySelection = presContext->PresShell()->GetSelectionFlags();
|
|
if (!(displaySelection & nsISelectionDisplay::DISPLAY_IMAGES))
|
|
return false;//no need to check the blue border, we cannot be drawn selected
|
|
//insert hook here for image selection drawing
|
|
#if IMAGE_EDITOR_CHECK
|
|
//check to see if this frame is in an editor context
|
|
//isEditor check. this needs to be changed to have better way to check
|
|
if (displaySelection == nsISelectionDisplay::DISPLAY_ALL)
|
|
{
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
result = GetSelectionController(presContext, getter_AddRefs(selCon));
|
|
if (NS_SUCCEEDED(result) && selCon)
|
|
{
|
|
nsCOMPtr<nsISelection> selection;
|
|
result = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
|
|
if (NS_SUCCEEDED(result) && selection)
|
|
{
|
|
PRInt32 rangeCount;
|
|
selection->GetRangeCount(&rangeCount);
|
|
if (rangeCount == 1) //if not one then let code drop to nsFrame::Paint
|
|
{
|
|
nsCOMPtr<nsIContent> parentContent = mContent->GetParent();
|
|
if (parentContent)
|
|
{
|
|
PRInt32 thisOffset = parentContent->IndexOf(mContent);
|
|
nsCOMPtr<nsIDOMNode> parentNode = do_QueryInterface(parentContent);
|
|
nsCOMPtr<nsIDOMNode> rangeNode;
|
|
PRInt32 rangeOffset;
|
|
nsCOMPtr<nsIDOMRange> range;
|
|
selection->GetRangeAt(0,getter_AddRefs(range));
|
|
if (range)
|
|
{
|
|
range->GetStartContainer(getter_AddRefs(rangeNode));
|
|
range->GetStartOffset(&rangeOffset);
|
|
|
|
if (parentNode && rangeNode && (rangeNode == parentNode) && rangeOffset == thisOffset)
|
|
{
|
|
range->GetEndContainer(getter_AddRefs(rangeNode));
|
|
range->GetEndOffset(&rangeOffset);
|
|
if ((rangeNode == parentNode) && (rangeOffset == (thisOffset +1))) //+1 since that would mean this whole content is selected only
|
|
return false; //do not allow nsFrame do draw any further selection
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
nsImageMap*
|
|
nsImageFrame::GetImageMap()
|
|
{
|
|
if (!mImageMap) {
|
|
nsIDocument* doc = mContent->GetDocument();
|
|
if (!doc) {
|
|
return nsnull;
|
|
}
|
|
|
|
nsAutoString usemap;
|
|
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::usemap, usemap);
|
|
|
|
nsCOMPtr<nsIContent> map = doc->FindImageMap(usemap);
|
|
if (map) {
|
|
mImageMap = new nsImageMap();
|
|
NS_ADDREF(mImageMap);
|
|
mImageMap->Init(this, map);
|
|
}
|
|
}
|
|
|
|
return mImageMap;
|
|
}
|
|
|
|
bool
|
|
nsImageFrame::IsServerImageMap()
|
|
{
|
|
return mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::ismap);
|
|
}
|
|
|
|
// Translate an point that is relative to our frame
|
|
// into a localized pixel coordinate that is relative to the
|
|
// content area of this frame (inside the border+padding).
|
|
void
|
|
nsImageFrame::TranslateEventCoords(const nsPoint& aPoint,
|
|
nsIntPoint& aResult)
|
|
{
|
|
nscoord x = aPoint.x;
|
|
nscoord y = aPoint.y;
|
|
|
|
// Subtract out border and padding here so that the coordinates are
|
|
// now relative to the content area of this frame.
|
|
nsRect inner = GetInnerArea();
|
|
x -= inner.x;
|
|
y -= inner.y;
|
|
|
|
aResult.x = nsPresContext::AppUnitsToIntCSSPixels(x);
|
|
aResult.y = nsPresContext::AppUnitsToIntCSSPixels(y);
|
|
}
|
|
|
|
bool
|
|
nsImageFrame::GetAnchorHREFTargetAndNode(nsIURI** aHref, nsString& aTarget,
|
|
nsIContent** aNode)
|
|
{
|
|
bool status = false;
|
|
aTarget.Truncate();
|
|
*aHref = nsnull;
|
|
*aNode = nsnull;
|
|
|
|
// Walk up the content tree, looking for an nsIDOMAnchorElement
|
|
for (nsIContent* content = mContent->GetParent();
|
|
content; content = content->GetParent()) {
|
|
nsCOMPtr<nsILink> link(do_QueryInterface(content));
|
|
if (link) {
|
|
nsCOMPtr<nsIURI> href = content->GetHrefURI();
|
|
if (href) {
|
|
href->Clone(aHref);
|
|
}
|
|
status = (*aHref != nsnull);
|
|
|
|
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(content));
|
|
if (anchor) {
|
|
anchor->GetTarget(aTarget);
|
|
}
|
|
NS_ADDREF(*aNode = content);
|
|
break;
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::GetContentForEvent(nsEvent* aEvent,
|
|
nsIContent** aContent)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aContent);
|
|
|
|
nsIFrame* f = nsLayoutUtils::GetNonGeneratedAncestor(this);
|
|
if (f != this) {
|
|
return f->GetContentForEvent(aEvent, aContent);
|
|
}
|
|
|
|
// XXX We need to make this special check for area element's capturing the
|
|
// mouse due to bug 135040. Remove it once that's fixed.
|
|
nsIContent* capturingContent =
|
|
NS_IS_MOUSE_EVENT(aEvent) ? nsIPresShell::GetCapturingContent() : nsnull;
|
|
if (capturingContent && capturingContent->GetPrimaryFrame() == this) {
|
|
*aContent = capturingContent;
|
|
NS_IF_ADDREF(*aContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsImageMap* map = GetImageMap();
|
|
|
|
if (nsnull != map) {
|
|
nsIntPoint p;
|
|
TranslateEventCoords(
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, this), p);
|
|
nsCOMPtr<nsIContent> area = map->GetArea(p.x, p.y);
|
|
if (area) {
|
|
area.forget(aContent);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
*aContent = GetContent();
|
|
NS_IF_ADDREF(*aContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
// XXX what should clicks on transparent pixels do?
|
|
NS_IMETHODIMP
|
|
nsImageFrame::HandleEvent(nsPresContext* aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aEventStatus);
|
|
|
|
if ((aEvent->eventStructType == NS_MOUSE_EVENT &&
|
|
aEvent->message == NS_MOUSE_BUTTON_UP &&
|
|
static_cast<nsMouseEvent*>(aEvent)->button == nsMouseEvent::eLeftButton) ||
|
|
aEvent->message == NS_MOUSE_MOVE) {
|
|
nsImageMap* map = GetImageMap();
|
|
bool isServerMap = IsServerImageMap();
|
|
if ((nsnull != map) || isServerMap) {
|
|
nsIntPoint p;
|
|
TranslateEventCoords(
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, this), p);
|
|
bool inside = false;
|
|
// Even though client-side image map triggering happens
|
|
// through content, we need to make sure we're not inside
|
|
// (in case we deal with a case of both client-side and
|
|
// sever-side on the same image - it happens!)
|
|
if (nsnull != map) {
|
|
inside = !!map->GetArea(p.x, p.y);
|
|
}
|
|
|
|
if (!inside && isServerMap) {
|
|
|
|
// Server side image maps use the href in a containing anchor
|
|
// element to provide the basis for the destination url.
|
|
nsCOMPtr<nsIURI> uri;
|
|
nsAutoString target;
|
|
nsCOMPtr<nsIContent> anchorNode;
|
|
if (GetAnchorHREFTargetAndNode(getter_AddRefs(uri), target,
|
|
getter_AddRefs(anchorNode))) {
|
|
// XXX if the mouse is over/clicked in the border/padding area
|
|
// we should probably just pretend nothing happened. Nav4
|
|
// keeps the x,y coordinates positive as we do; IE doesn't
|
|
// bother. Both of them send the click through even when the
|
|
// mouse is over the border.
|
|
if (p.x < 0) p.x = 0;
|
|
if (p.y < 0) p.y = 0;
|
|
nsCAutoString spec;
|
|
uri->GetSpec(spec);
|
|
spec += nsPrintfCString("?%d,%d", p.x, p.y);
|
|
uri->SetSpec(spec);
|
|
|
|
bool clicked = false;
|
|
if (aEvent->message == NS_MOUSE_BUTTON_UP) {
|
|
*aEventStatus = nsEventStatus_eConsumeDoDefault;
|
|
clicked = true;
|
|
}
|
|
nsContentUtils::TriggerLink(anchorNode, aPresContext, uri, target,
|
|
clicked, true, true);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nsSplittableFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::GetCursor(const nsPoint& aPoint,
|
|
nsIFrame::Cursor& aCursor)
|
|
{
|
|
nsImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
nsIntPoint p;
|
|
TranslateEventCoords(aPoint, p);
|
|
nsCOMPtr<nsIContent> area = map->GetArea(p.x, p.y);
|
|
if (area) {
|
|
// Use the cursor from the style of the *area* element.
|
|
// XXX Using the image as the parent style context isn't
|
|
// technically correct, but it's probably the right thing to do
|
|
// here, since it means that areas on which the cursor isn't
|
|
// specified will inherit the style from the image.
|
|
nsRefPtr<nsStyleContext> areaStyle =
|
|
PresContext()->PresShell()->StyleSet()->
|
|
ResolveStyleFor(area->AsElement(), GetStyleContext());
|
|
if (areaStyle) {
|
|
FillCursorInformationFromStyle(areaStyle->GetStyleUserInterface(),
|
|
aCursor);
|
|
if (NS_STYLE_CURSOR_AUTO == aCursor.mCursor) {
|
|
aCursor.mCursor = NS_STYLE_CURSOR_DEFAULT;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
return nsFrame::GetCursor(aPoint, aCursor);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::AttributeChanged(PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType)
|
|
{
|
|
nsresult rv = nsSplittableFrame::AttributeChanged(aNameSpaceID,
|
|
aAttribute, aModType);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsGkAtoms::alt == aAttribute)
|
|
{
|
|
PresContext()->PresShell()->FrameNeedsReflow(this,
|
|
nsIPresShell::eStyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIAtom*
|
|
nsImageFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::imageFrame;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsImageFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("ImageFrame"), aResult);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
#ifdef DEBUG_waterson
|
|
fprintf(out, " [parent=%p]", mParent);
|
|
#endif
|
|
if (HasView()) {
|
|
fprintf(out, " [view=%p]", (void*)GetView());
|
|
}
|
|
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
|
|
if (0 != mState) {
|
|
fprintf(out, " [state=%016llx]", (unsigned long long)mState);
|
|
}
|
|
fprintf(out, " [content=%p]", (void*)mContent);
|
|
fprintf(out, " [sc=%p]", static_cast<void*>(mStyleContext));
|
|
|
|
// output the img src url
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
if (imageLoader) {
|
|
nsCOMPtr<imgIRequest> currentRequest;
|
|
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(currentRequest));
|
|
if (currentRequest) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
currentRequest->GetURI(getter_AddRefs(uri));
|
|
nsCAutoString uristr;
|
|
uri->GetAsciiSpec(uristr);
|
|
fprintf(out, " [src=%s]", uristr.get());
|
|
}
|
|
}
|
|
fputs("\n", out);
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|
|
PRIntn
|
|
nsImageFrame::GetSkipSides() const
|
|
{
|
|
PRIntn skip = 0;
|
|
if (nsnull != GetPrevInFlow()) {
|
|
skip |= 1 << NS_SIDE_TOP;
|
|
}
|
|
if (nsnull != GetNextInFlow()) {
|
|
skip |= 1 << NS_SIDE_BOTTOM;
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
nsresult
|
|
nsImageFrame::GetIntrinsicImageSize(nsSize& aSize)
|
|
{
|
|
if (mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord &&
|
|
mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord) {
|
|
aSize.SizeTo(mIntrinsicSize.width.GetCoordValue(),
|
|
mIntrinsicSize.height.GetCoordValue());
|
|
return NS_OK;
|
|
}
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
nsImageFrame::LoadIcon(const nsAString& aSpec,
|
|
nsPresContext *aPresContext,
|
|
imgIRequest** aRequest)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
NS_PRECONDITION(!aSpec.IsEmpty(), "What happened??");
|
|
|
|
if (!sIOService) {
|
|
rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> realURI;
|
|
SpecToURI(aSpec, sIOService, getter_AddRefs(realURI));
|
|
|
|
nsCOMPtr<imgILoader> il(do_GetService("@mozilla.org/image/loader;1", &rv));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
GetLoadGroup(aPresContext, getter_AddRefs(loadGroup));
|
|
|
|
// For icon loads, we don't need to merge with the loadgroup flags
|
|
nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL;
|
|
|
|
return il->LoadImage(realURI, /* icon URI */
|
|
nsnull, /* initial document URI; this is only
|
|
relevant for cookies, so does not
|
|
apply to icons. */
|
|
nsnull, /* referrer (not relevant for icons) */
|
|
nsnull, /* principal (not relevant for icons) */
|
|
loadGroup,
|
|
gIconLoad,
|
|
nsnull, /* Not associated with any particular document */
|
|
loadFlags,
|
|
nsnull,
|
|
nsnull,
|
|
nsnull, /* channel policy not needed */
|
|
aRequest);
|
|
}
|
|
|
|
void
|
|
nsImageFrame::GetDocumentCharacterSet(nsACString& aCharset) const
|
|
{
|
|
if (mContent) {
|
|
NS_ASSERTION(mContent->GetDocument(),
|
|
"Frame still alive after content removed from document!");
|
|
aCharset = mContent->GetDocument()->GetDocumentCharacterSet();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsImageFrame::SpecToURI(const nsAString& aSpec, nsIIOService *aIOService,
|
|
nsIURI **aURI)
|
|
{
|
|
nsCOMPtr<nsIURI> baseURI;
|
|
if (mContent) {
|
|
baseURI = mContent->GetBaseURI();
|
|
}
|
|
nsCAutoString charset;
|
|
GetDocumentCharacterSet(charset);
|
|
NS_NewURI(aURI, aSpec,
|
|
charset.IsEmpty() ? nsnull : charset.get(),
|
|
baseURI, aIOService);
|
|
}
|
|
|
|
void
|
|
nsImageFrame::GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup)
|
|
{
|
|
if (!aPresContext)
|
|
return;
|
|
|
|
NS_PRECONDITION(nsnull != aLoadGroup, "null OUT parameter pointer");
|
|
|
|
nsIPresShell *shell = aPresContext->GetPresShell();
|
|
|
|
if (!shell)
|
|
return;
|
|
|
|
nsIDocument *doc = shell->GetDocument();
|
|
if (!doc)
|
|
return;
|
|
|
|
*aLoadGroup = doc->GetDocumentLoadGroup().get(); // already_AddRefed
|
|
}
|
|
|
|
nsresult nsImageFrame::LoadIcons(nsPresContext *aPresContext)
|
|
{
|
|
NS_ASSERTION(!gIconLoad, "called LoadIcons twice");
|
|
|
|
NS_NAMED_LITERAL_STRING(loadingSrc,"resource://gre-resources/loading-image.png");
|
|
NS_NAMED_LITERAL_STRING(brokenSrc,"resource://gre-resources/broken-image.png");
|
|
|
|
gIconLoad = new IconLoad();
|
|
NS_ADDREF(gIconLoad);
|
|
|
|
nsresult rv;
|
|
// create a loader and load the images
|
|
rv = LoadIcon(loadingSrc,
|
|
aPresContext,
|
|
getter_AddRefs(gIconLoad->mLoadingImage));
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = LoadIcon(brokenSrc,
|
|
aPresContext,
|
|
getter_AddRefs(gIconLoad->mBrokenImage));
|
|
return rv;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS2(nsImageFrame::IconLoad, nsIObserver,
|
|
imgIDecoderObserver)
|
|
|
|
static const char* kIconLoadPrefs[] = {
|
|
"browser.display.force_inline_alttext",
|
|
"browser.display.show_image_placeholders",
|
|
nsnull
|
|
};
|
|
|
|
nsImageFrame::IconLoad::IconLoad()
|
|
{
|
|
// register observers
|
|
Preferences::AddStrongObservers(this, kIconLoadPrefs);
|
|
GetPrefs();
|
|
}
|
|
|
|
void
|
|
nsImageFrame::IconLoad::Shutdown()
|
|
{
|
|
Preferences::RemoveObservers(this, kIconLoadPrefs);
|
|
// in case the pref service releases us later
|
|
if (mLoadingImage) {
|
|
mLoadingImage->CancelAndForgetObserver(NS_ERROR_FAILURE);
|
|
mLoadingImage = nsnull;
|
|
}
|
|
if (mBrokenImage) {
|
|
mBrokenImage->CancelAndForgetObserver(NS_ERROR_FAILURE);
|
|
mBrokenImage = nsnull;
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::Observe(nsISupports *aSubject, const char* aTopic,
|
|
const PRUnichar* aData)
|
|
{
|
|
NS_ASSERTION(!nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID),
|
|
"wrong topic");
|
|
#ifdef DEBUG
|
|
// assert |aData| is one of our prefs.
|
|
for (PRUint32 i = 0; i < ArrayLength(kIconLoadPrefs) ||
|
|
(NS_NOTREACHED("wrong pref"), false); ++i)
|
|
if (NS_ConvertASCIItoUTF16(kIconLoadPrefs[i]) == nsDependentString(aData))
|
|
break;
|
|
#endif
|
|
|
|
GetPrefs();
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsImageFrame::IconLoad::GetPrefs()
|
|
{
|
|
mPrefForceInlineAltText =
|
|
Preferences::GetBool("browser.display.force_inline_alttext");
|
|
|
|
mPrefShowPlaceholders =
|
|
Preferences::GetBool("browser.display.show_image_placeholders", true);
|
|
}
|
|
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStartRequest(imgIRequest *aRequest)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStartDecode(imgIRequest *aRequest)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStartContainer(imgIRequest *aRequest,
|
|
imgIContainer *aContainer)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStartFrame(imgIRequest *aRequest,
|
|
PRUint32 aFrame)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnDataAvailable(imgIRequest *aRequest,
|
|
bool aCurrentFrame,
|
|
const nsIntRect * aRect)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStopFrame(imgIRequest *aRequest,
|
|
PRUint32 aFrame)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStopContainer(imgIRequest *aRequest,
|
|
imgIContainer *aContainer)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStopDecode(imgIRequest *aRequest,
|
|
nsresult status,
|
|
const PRUnichar *statusArg)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnImageIsAnimated(imgIRequest *aRequest)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnStopRequest(imgIRequest *aRequest,
|
|
bool aIsLastPart)
|
|
{
|
|
nsTObserverArray<nsImageFrame*>::ForwardIterator iter(mIconObservers);
|
|
nsImageFrame *frame;
|
|
while (iter.HasMore()) {
|
|
frame = iter.GetNext();
|
|
frame->Invalidate(frame->GetRect());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::OnDiscard(imgIRequest *aRequest)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::FrameChanged(imgIRequest *aRequest,
|
|
imgIContainer *aContainer,
|
|
const nsIntRect *aDirtyRect)
|
|
{
|
|
nsTObserverArray<nsImageFrame*>::ForwardIterator iter(mIconObservers);
|
|
nsImageFrame *frame;
|
|
while (iter.HasMore()) {
|
|
frame = iter.GetNext();
|
|
frame->Invalidate(frame->GetRect());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
|
|
NS_IMPL_ISUPPORTS2(nsImageListener, imgIDecoderObserver, imgIContainerObserver)
|
|
|
|
nsImageListener::nsImageListener(nsImageFrame *aFrame) :
|
|
mFrame(aFrame)
|
|
{
|
|
}
|
|
|
|
nsImageListener::~nsImageListener()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP nsImageListener::OnStartContainer(imgIRequest *aRequest,
|
|
imgIContainer *aImage)
|
|
{
|
|
if (!mFrame)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return mFrame->OnStartContainer(aRequest, aImage);
|
|
}
|
|
|
|
NS_IMETHODIMP nsImageListener::OnDataAvailable(imgIRequest *aRequest,
|
|
bool aCurrentFrame,
|
|
const nsIntRect *aRect)
|
|
{
|
|
if (!mFrame)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return mFrame->OnDataAvailable(aRequest, aCurrentFrame, aRect);
|
|
}
|
|
|
|
NS_IMETHODIMP nsImageListener::OnStopDecode(imgIRequest *aRequest,
|
|
nsresult status,
|
|
const PRUnichar *statusArg)
|
|
{
|
|
if (!mFrame)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return mFrame->OnStopDecode(aRequest, status, statusArg);
|
|
}
|
|
|
|
NS_IMETHODIMP nsImageListener::FrameChanged(imgIRequest *aRequest,
|
|
imgIContainer *aContainer,
|
|
const nsIntRect *aDirtyRect)
|
|
{
|
|
if (!mFrame)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return mFrame->FrameChanged(aRequest, aContainer, aDirtyRect);
|
|
}
|
|
|
|
static bool
|
|
IsInAutoWidthTableCellForQuirk(nsIFrame *aFrame)
|
|
{
|
|
if (eCompatibility_NavQuirks != aFrame->PresContext()->CompatibilityMode())
|
|
return false;
|
|
// Check if the parent of the closest nsBlockFrame has auto width.
|
|
nsBlockFrame *ancestor = nsLayoutUtils::FindNearestBlockAncestor(aFrame);
|
|
if (ancestor->GetStyleContext()->GetPseudo() == nsCSSAnonBoxes::cellContent) {
|
|
// Assume direct parent is a table cell frame.
|
|
nsFrame *grandAncestor = static_cast<nsFrame*>(ancestor->GetParent());
|
|
return grandAncestor &&
|
|
grandAncestor->GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Auto;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsImageFrame::AddInlineMinWidth(nsRenderingContext *aRenderingContext,
|
|
nsIFrame::InlineMinWidthData *aData)
|
|
{
|
|
|
|
NS_ASSERTION(GetParent(), "Must have a parent if we get here!");
|
|
|
|
bool canBreak =
|
|
!CanContinueTextRun() &&
|
|
GetParent()->GetStyleText()->WhiteSpaceCanWrap() &&
|
|
!IsInAutoWidthTableCellForQuirk(this);
|
|
|
|
if (canBreak)
|
|
aData->OptionallyBreak(aRenderingContext);
|
|
|
|
aData->trailingWhitespace = 0;
|
|
aData->skipWhitespace = false;
|
|
aData->trailingTextFrame = nsnull;
|
|
aData->currentLine += nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
|
|
this, nsLayoutUtils::MIN_WIDTH);
|
|
aData->atStartOfLine = false;
|
|
|
|
if (canBreak)
|
|
aData->OptionallyBreak(aRenderingContext);
|
|
|
|
}
|