ba5badedcb
the method, instead of setting them before calling the method. That way we can avoid reflowing the ancestor of a reflow root which is not itself dirty but has dirty children. This also makes it harder to set dirty bits inconsistently with the FrameNeedsReflow call. Bug 378784, r+sr=dbaron, pending rbs' review on the mathml parts. git-svn-id: svn://10.0.0.236/trunk@226007 18797224-902f-48f8-a5cc-f745e15eee43
661 lines
21 KiB
C++
661 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/* rendering object that goes directly inside the document's scrollbars */
|
|
|
|
#include "nsIServiceManager.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsHTMLContainerFrame.h"
|
|
#include "nsCSSRendering.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsStyleContext.h"
|
|
#include "nsIView.h"
|
|
#include "nsIViewManager.h"
|
|
#include "nsIRenderingContext.h"
|
|
#include "nsGUIEvent.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsGkAtoms.h"
|
|
#include "nsIEventStateManager.h"
|
|
#include "nsIDeviceContext.h"
|
|
#include "nsIPresShell.h"
|
|
#include "nsIScrollPositionListener.h"
|
|
#include "nsDisplayList.h"
|
|
|
|
// for focus
|
|
#include "nsIDOMWindowInternal.h"
|
|
#include "nsIFocusController.h"
|
|
#include "nsIScrollableFrame.h"
|
|
#include "nsIScrollableView.h"
|
|
#include "nsIDocShell.h"
|
|
#include "nsICanvasFrame.h"
|
|
|
|
#ifdef DEBUG_rods
|
|
//#define DEBUG_CANVAS_FOCUS
|
|
#endif
|
|
|
|
// Interface IDs
|
|
|
|
/**
|
|
* Root frame class.
|
|
*
|
|
* The root frame is the parent frame for the document element's frame.
|
|
* It only supports having a single child frame which must be an area
|
|
* frame
|
|
*/
|
|
class CanvasFrame : public nsHTMLContainerFrame,
|
|
public nsIScrollPositionListener,
|
|
public nsICanvasFrame {
|
|
public:
|
|
CanvasFrame(nsStyleContext* aContext)
|
|
: nsHTMLContainerFrame(aContext), mDoPaintFocus(PR_FALSE) {}
|
|
|
|
// nsISupports
|
|
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
|
|
|
|
NS_IMETHOD Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow);
|
|
virtual void Destroy();
|
|
|
|
NS_IMETHOD AppendFrames(nsIAtom* aListName,
|
|
nsIFrame* aFrameList);
|
|
NS_IMETHOD InsertFrames(nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList);
|
|
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
|
|
nsIFrame* aOldFrame);
|
|
|
|
virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
|
|
virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext);
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
virtual PRBool IsContainingBlock() const { return PR_TRUE; }
|
|
|
|
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists);
|
|
|
|
void PaintFocus(nsIRenderingContext& aRenderingContext, nsPoint aPt);
|
|
|
|
// nsIScrollPositionListener
|
|
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY);
|
|
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY);
|
|
|
|
// nsICanvasFrame
|
|
NS_IMETHOD SetHasFocus(PRBool aHasFocus);
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::canvasFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const;
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const;
|
|
#endif
|
|
NS_IMETHOD GetContentForEvent(nsPresContext* aPresContext,
|
|
nsEvent* aEvent,
|
|
nsIContent** aContent);
|
|
|
|
nsRect CanvasArea() const;
|
|
|
|
protected:
|
|
virtual PRIntn GetSkipSides() const;
|
|
|
|
// Data members
|
|
PRPackedBool mDoPaintFocus;
|
|
nsCOMPtr<nsIViewManager> mViewManager;
|
|
|
|
private:
|
|
NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
|
|
NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }
|
|
};
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsIFrame*
|
|
NS_NewCanvasFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
return new (aPresShell)CanvasFrame(aContext);
|
|
}
|
|
|
|
//--------------------------------------------------------------
|
|
// Frames are not refcounted, no need to AddRef
|
|
NS_IMETHODIMP
|
|
CanvasFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
|
|
{
|
|
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
|
|
if (NULL == aInstancePtr) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
if (aIID.Equals(NS_GET_IID(nsIScrollPositionListener))) {
|
|
*aInstancePtr = (void*) ((nsIScrollPositionListener*) this);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aIID.Equals(NS_GET_IID(nsICanvasFrame))) {
|
|
*aInstancePtr = (void*) ((nsICanvasFrame*) this);
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
return nsHTMLContainerFrame::QueryInterface(aIID, aInstancePtr);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
nsresult rv = nsHTMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
|
|
|
|
mViewManager = PresContext()->GetViewManager();
|
|
|
|
nsIScrollableView* scrollingView = nsnull;
|
|
mViewManager->GetRootScrollableView(&scrollingView);
|
|
if (scrollingView) {
|
|
scrollingView->AddScrollPositionListener(this);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
CanvasFrame::Destroy()
|
|
{
|
|
nsIScrollableView* scrollingView = nsnull;
|
|
mViewManager->GetRootScrollableView(&scrollingView);
|
|
if (scrollingView) {
|
|
scrollingView->RemoveScrollPositionListener(this);
|
|
}
|
|
|
|
nsHTMLContainerFrame::Destroy();
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::ScrollPositionWillChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY)
|
|
{
|
|
#ifdef DEBUG_CANVAS_FOCUS
|
|
{
|
|
PRBool hasFocus = PR_FALSE;
|
|
nsCOMPtr<nsIViewObserver> observer;
|
|
mViewManager->GetViewObserver(*getter_AddRefs(observer));
|
|
nsCOMPtr<nsIPresShell> shell = do_QueryInterface(observer);
|
|
nsCOMPtr<nsPresContext> context;
|
|
shell->GetPresContext(getter_AddRefs(context));
|
|
nsCOMPtr<nsISupports> container;
|
|
context->GetContainer(getter_AddRefs(container));
|
|
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
|
|
if (docShell) {
|
|
docShell->GetHasFocus(&hasFocus);
|
|
}
|
|
printf("SPWC: %p HF: %s mDoPaintFocus: %s\n", docShell.get(), hasFocus?"Y":"N", mDoPaintFocus?"Y":"N");
|
|
}
|
|
#endif
|
|
|
|
if (mDoPaintFocus) {
|
|
mDoPaintFocus = PR_FALSE;
|
|
mViewManager->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::SetHasFocus(PRBool aHasFocus)
|
|
{
|
|
if (mDoPaintFocus != aHasFocus) {
|
|
mDoPaintFocus = aHasFocus;
|
|
nsIViewManager* vm = PresContext()->PresShell()->GetViewManager();
|
|
if (vm) {
|
|
vm->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::AppendFrames(nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
nsresult rv;
|
|
|
|
NS_ASSERTION(!aListName, "unexpected child list name");
|
|
NS_PRECONDITION(mFrames.IsEmpty(), "already have a child frame");
|
|
if (aListName) {
|
|
// We only support unnamed principal child list
|
|
rv = NS_ERROR_INVALID_ARG;
|
|
|
|
} else if (!mFrames.IsEmpty()) {
|
|
// We only allow a single child frame
|
|
rv = NS_ERROR_FAILURE;
|
|
|
|
} else {
|
|
// Insert the new frames
|
|
#ifdef NS_DEBUG
|
|
nsFrame::VerifyDirtyBitSet(aFrameList);
|
|
#endif
|
|
mFrames.AppendFrame(nsnull, aFrameList);
|
|
|
|
rv = PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::InsertFrames(nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
nsresult rv;
|
|
|
|
// Because we only support a single child frame inserting is the same
|
|
// as appending
|
|
NS_PRECONDITION(!aPrevFrame, "unexpected previous sibling frame");
|
|
if (aPrevFrame) {
|
|
rv = NS_ERROR_UNEXPECTED;
|
|
} else {
|
|
rv = AppendFrames(aListName, aFrameList);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::RemoveFrame(nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
nsresult rv;
|
|
|
|
NS_ASSERTION(!aListName, "unexpected child list name");
|
|
if (aListName) {
|
|
// We only support the unnamed principal child list
|
|
rv = NS_ERROR_INVALID_ARG;
|
|
|
|
} else if (aOldFrame == mFrames.FirstChild()) {
|
|
// It's our one and only child frame
|
|
// Damage the area occupied by the deleted frame
|
|
// The child of the canvas probably can't have an outline, but why bother
|
|
// thinking about that?
|
|
Invalidate(aOldFrame->GetOverflowRect() + aOldFrame->GetPosition(), PR_FALSE);
|
|
|
|
// Remove the frame and destroy it
|
|
mFrames.DestroyFrame(aOldFrame);
|
|
|
|
rv = PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
} else {
|
|
rv = NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsRect CanvasFrame::CanvasArea() const
|
|
{
|
|
nsRect result(GetOverflowRect());
|
|
|
|
nsIScrollableFrame *scrollableFrame;
|
|
CallQueryInterface(GetParent(), &scrollableFrame);
|
|
if (scrollableFrame) {
|
|
nsIScrollableView* scrollableView = scrollableFrame->GetScrollableView();
|
|
nsRect vcr = scrollableView->View()->GetBounds();
|
|
result.UnionRect(result, nsRect(nsPoint(0, 0), vcr.Size()));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Override nsDisplayBackground methods so that we pass aBGClipRect to
|
|
* PaintBackground, covering the whole overflow area.
|
|
*/
|
|
class nsDisplayCanvasBackground : public nsDisplayBackground {
|
|
public:
|
|
nsDisplayCanvasBackground(nsIFrame *aFrame)
|
|
: nsDisplayBackground(aFrame)
|
|
{
|
|
}
|
|
|
|
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
CanvasFrame* frame = NS_STATIC_CAST(CanvasFrame*, mFrame);
|
|
return frame->CanvasArea() + aBuilder->ToReferenceFrame(mFrame);
|
|
}
|
|
|
|
virtual void Paint(nsDisplayListBuilder* aBuilder,
|
|
nsIRenderingContext* aCtx, const nsRect& aDirtyRect)
|
|
{
|
|
CanvasFrame* frame = NS_STATIC_CAST(CanvasFrame*, mFrame);
|
|
nsPoint offset = aBuilder->ToReferenceFrame(mFrame);
|
|
nsRect bgClipRect = frame->CanvasArea() + offset;
|
|
nsCSSRendering::PaintBackground(mFrame->PresContext(), *aCtx, mFrame,
|
|
aDirtyRect,
|
|
nsRect(offset, mFrame->GetSize()),
|
|
*mFrame->GetStyleBorder(),
|
|
*mFrame->GetStylePadding(),
|
|
mFrame->HonorPrintBackgroundSettings(),
|
|
&bgClipRect);
|
|
}
|
|
|
|
NS_DISPLAY_DECL_NAME("CanvasBackground")
|
|
};
|
|
|
|
/**
|
|
* A display item to paint the focus ring for the document.
|
|
*
|
|
* The only reason this can't use nsDisplayGeneric is overriding GetBounds.
|
|
*/
|
|
class nsDisplayCanvasFocus : public nsDisplayItem {
|
|
public:
|
|
nsDisplayCanvasFocus(CanvasFrame *aFrame)
|
|
: nsDisplayItem(aFrame)
|
|
{
|
|
}
|
|
|
|
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
// This is an overestimate, but that's not a problem.
|
|
CanvasFrame* frame = NS_STATIC_CAST(CanvasFrame*, mFrame);
|
|
return frame->CanvasArea() + aBuilder->ToReferenceFrame(mFrame);
|
|
}
|
|
|
|
virtual void Paint(nsDisplayListBuilder* aBuilder,
|
|
nsIRenderingContext* aCtx, const nsRect& aDirtyRect)
|
|
{
|
|
CanvasFrame* frame = NS_STATIC_CAST(CanvasFrame*, mFrame);
|
|
frame->PaintFocus(*aCtx, aBuilder->ToReferenceFrame(mFrame));
|
|
}
|
|
|
|
NS_DISPLAY_DECL_NAME("CanvasFocus")
|
|
};
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists)
|
|
{
|
|
nsresult rv;
|
|
// Force a background to be shown. We may have a background propagated to us,
|
|
// in which case GetStyleBackground wouldn't have the right background
|
|
// and the code in nsFrame::DisplayBorderBackgroundOutline might not give us
|
|
// a background.
|
|
// We don't have any border or outline, and our background draws over
|
|
// the overflow area, so just add nsDisplayCanvasBackground instead of
|
|
// calling DisplayBorderBackgroundOutline.
|
|
if (IsVisibleForPainting(aBuilder)) {
|
|
rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
|
|
nsDisplayCanvasBackground(this));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
nsIFrame* kid = GetFirstChild(nsnull);
|
|
if (kid) {
|
|
// Put our child into its own pseudo-stack.
|
|
rv = BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists,
|
|
DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
#ifdef DEBUG_CANVAS_FOCUS
|
|
nsCOMPtr<nsIContent> focusContent;
|
|
aPresContext->EventStateManager()->
|
|
GetFocusedContent(getter_AddRefs(focusContent));
|
|
|
|
PRBool hasFocus = PR_FALSE;
|
|
nsCOMPtr<nsISupports> container;
|
|
aPresContext->GetContainer(getter_AddRefs(container));
|
|
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
|
|
if (docShell) {
|
|
docShell->GetHasFocus(&hasFocus);
|
|
printf("%p - CanvasFrame::Paint R:%d,%d,%d,%d DR: %d,%d,%d,%d\n", this,
|
|
mRect.x, mRect.y, mRect.width, mRect.height,
|
|
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
|
|
}
|
|
printf("%p - Focus: %s c: %p DoPaint:%s\n", docShell.get(), hasFocus?"Y":"N",
|
|
focusContent.get(), mDoPaintFocus?"Y":"N");
|
|
#endif
|
|
|
|
if (!mDoPaintFocus)
|
|
return NS_OK;
|
|
// Only paint the focus if we're visible
|
|
if (!GetStyleVisibility()->IsVisible())
|
|
return NS_OK;
|
|
|
|
return aLists.Outlines()->AppendNewToTop(new (aBuilder)
|
|
nsDisplayCanvasFocus(this));
|
|
}
|
|
|
|
void
|
|
CanvasFrame::PaintFocus(nsIRenderingContext& aRenderingContext, nsPoint aPt)
|
|
{
|
|
nsRect focusRect(aPt, GetSize());
|
|
|
|
nsIScrollableFrame *scrollableFrame;
|
|
CallQueryInterface(GetParent(), &scrollableFrame);
|
|
|
|
if (scrollableFrame) {
|
|
nsIScrollableView* scrollableView = scrollableFrame->GetScrollableView();
|
|
nsRect vcr = scrollableView->View()->GetBounds();
|
|
focusRect.width = vcr.width;
|
|
focusRect.height = vcr.height;
|
|
nscoord x,y;
|
|
scrollableView->GetScrollPosition(x, y);
|
|
focusRect.x += x;
|
|
focusRect.y += y;
|
|
}
|
|
|
|
nsStyleOutline outlineStyle(PresContext());
|
|
outlineStyle.SetOutlineStyle(NS_STYLE_BORDER_STYLE_DOTTED);
|
|
outlineStyle.SetOutlineInitialColor();
|
|
|
|
// XXX use the root frame foreground color, but should we find BODY frame
|
|
// for HTML documents?
|
|
nsIFrame* root = mFrames.FirstChild();
|
|
const nsStyleColor* color =
|
|
root ? root->GetStyleContext()->GetStyleColor() :
|
|
mStyleContext->GetStyleColor();
|
|
if (!color) {
|
|
NS_ERROR("current color cannot be found");
|
|
return;
|
|
}
|
|
|
|
// XXX the CSS border for links is specified as 2px, but it
|
|
// is only drawn as 1px. Match this here.
|
|
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
|
|
|
|
nsRect borderInside(focusRect.x + onePixel,
|
|
focusRect.y + onePixel,
|
|
focusRect.width - 2 * onePixel,
|
|
focusRect.height - 2 * onePixel);
|
|
|
|
nsCSSRendering::DrawDashedSides(0, aRenderingContext,
|
|
focusRect, color,
|
|
nsnull, &outlineStyle,
|
|
PR_TRUE, focusRect,
|
|
borderInside, 0,
|
|
nsnull);
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
CanvasFrame::GetMinWidth(nsIRenderingContext *aRenderingContext)
|
|
{
|
|
nscoord result;
|
|
DISPLAY_MIN_WIDTH(this, result);
|
|
if (mFrames.IsEmpty())
|
|
result = 0;
|
|
else
|
|
result = mFrames.FirstChild()->GetMinWidth(aRenderingContext);
|
|
return result;
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
CanvasFrame::GetPrefWidth(nsIRenderingContext *aRenderingContext)
|
|
{
|
|
nscoord result;
|
|
DISPLAY_PREF_WIDTH(this, result);
|
|
if (mFrames.IsEmpty())
|
|
result = 0;
|
|
else
|
|
result = mFrames.FirstChild()->GetPrefWidth(aRenderingContext);
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("CanvasFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
|
|
NS_FRAME_TRACE_REFLOW_IN("CanvasFrame::Reflow");
|
|
|
|
// Initialize OUT parameter
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
|
|
// Reflow our one and only child frame
|
|
nsHTMLReflowMetrics kidDesiredSize;
|
|
if (mFrames.IsEmpty()) {
|
|
// We have no child frame, so return an empty size
|
|
aDesiredSize.width = aDesiredSize.height = 0;
|
|
} else {
|
|
nsIFrame* kidFrame = mFrames.FirstChild();
|
|
PRBool kidDirty = (kidFrame->GetStateBits() & NS_FRAME_IS_DIRTY) != 0;
|
|
|
|
// We must specify an unconstrained available height, because constrained
|
|
// is only for when we're paginated...
|
|
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, kidFrame,
|
|
nsSize(aReflowState.availableWidth,
|
|
NS_UNCONSTRAINEDSIZE));
|
|
|
|
// Reflow the frame
|
|
ReflowChild(kidFrame, aPresContext, kidDesiredSize, kidReflowState,
|
|
kidReflowState.mComputedMargin.left, kidReflowState.mComputedMargin.top,
|
|
0, aStatus);
|
|
|
|
// Complete the reflow and position and size the child frame
|
|
FinishReflowChild(kidFrame, aPresContext, &kidReflowState, kidDesiredSize,
|
|
kidReflowState.mComputedMargin.left,
|
|
kidReflowState.mComputedMargin.top, 0);
|
|
|
|
// If the child frame was just inserted, then we're responsible for making sure
|
|
// it repaints
|
|
if (kidDirty) {
|
|
// But we have a new child, which will affect our background, so
|
|
// invalidate our whole rect.
|
|
// Note: Even though we request to be sized to our child's size, our
|
|
// scroll frame ensures that we are always the size of the viewport.
|
|
// Also note: GetPosition() on a CanvasFrame is always going to return
|
|
// (0, 0). We only want to invalidate GetRect() since GetOverflowRect()
|
|
// could also include overflow to our top and left (out of the viewport)
|
|
// which doesn't need to be painted.
|
|
Invalidate(GetRect(), PR_FALSE);
|
|
}
|
|
|
|
// Return our desired size (which doesn't matter)
|
|
aDesiredSize.width = aReflowState.availableWidth;
|
|
aDesiredSize.height = kidDesiredSize.height +
|
|
kidReflowState.mComputedMargin.TopBottom();
|
|
|
|
aDesiredSize.mOverflowArea.UnionRect(
|
|
nsRect(0, 0, aDesiredSize.width, aDesiredSize.height),
|
|
kidDesiredSize.mOverflowArea +
|
|
nsPoint(kidReflowState.mComputedMargin.left,
|
|
kidReflowState.mComputedMargin.top));
|
|
FinishAndStoreOverflow(&aDesiredSize);
|
|
}
|
|
|
|
NS_FRAME_TRACE_REFLOW_OUT("CanvasFrame::Reflow", aStatus);
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRIntn
|
|
CanvasFrame::GetSkipSides() const
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
nsIAtom*
|
|
CanvasFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::canvasFrame;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CanvasFrame::GetContentForEvent(nsPresContext* aPresContext,
|
|
nsEvent* aEvent,
|
|
nsIContent** aContent)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aContent);
|
|
nsresult rv = nsFrame::GetContentForEvent(aPresContext,
|
|
aEvent,
|
|
aContent);
|
|
if (NS_FAILED(rv) || !*aContent) {
|
|
nsIFrame* kid = mFrames.FirstChild();
|
|
if (kid) {
|
|
rv = kid->GetContentForEvent(aPresContext,
|
|
aEvent,
|
|
aContent);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
CanvasFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("Canvas"), aResult);
|
|
}
|
|
#endif
|