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Mozilla/mozilla/layout/generic/nsContainerFrame.cpp
dbaron%fas.harvard.edu 8b3489a026 Bug 86947: 
Make the line list doubly linked and access it through a list class and iterators.
Stop recomputing margins on all of the children of each block in the reflow chain (which causes O(N^2) state recovery during incremental reflow).  Instead, add a second dirty bit to the lines and walk backwards through the line list to recompute vertical margins only when either dirty bit is set and the previous line was not reflowed.  Add nsIFrame::IsEmpty to identify frames through which margins collapse.
Fix O(N^2) propagation of float damage by maintaining a set of intervals damaged by floats (bug 61962) and be sure to damage the correct areas (bug 48138).
Introduce nsCollapsingMargin to do correct collapsing of combinations of positive and negative margins (bug 50142).
Clean up some odds and ends and fix another smaller O(N^2) problem in nsBlockFrame::AddFrames.
r=attinasi, rbs  sr=waterson


git-svn-id: svn://10.0.0.236/trunk@106224 18797224-902f-48f8-a5cc-f745e15eee43
2001-10-25 01:08:40 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 NPL, 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsContainerFrame.h"
#include "nsIContent.h"
#include "nsIPresContext.h"
#include "nsIRenderingContext.h"
#include "nsISpaceManager.h"
#include "nsIStyleContext.h"
#include "nsRect.h"
#include "nsPoint.h"
#include "nsGUIEvent.h"
#include "nsStyleConsts.h"
#include "nsIView.h"
#include "nsIScrollableView.h"
#include "nsVoidArray.h"
#include "nsISizeOfHandler.h"
#include "nsIReflowCommand.h"
#include "nsHTMLIIDs.h"
#include "nsHTMLContainerFrame.h"
#include "nsIFrameManager.h"
#include "nsIPresShell.h"
#include "nsCOMPtr.h"
#include "nsLayoutAtoms.h"
#include "nsIViewManager.h"
#include "nsIWidget.h"
#ifdef NS_DEBUG
#undef NOISY
#else
#undef NOISY
#endif
nsContainerFrame::nsContainerFrame()
{
}
nsContainerFrame::~nsContainerFrame()
{
}
NS_IMETHODIMP
nsContainerFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv;
rv = nsSplittableFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
if (aPrevInFlow) {
// Make sure we copy bits from our prev-in-flow that will affect
// us. A continuation for a container frame needs to know if it
// has a child with a view so that we'll properly reposition it.
nsFrameState state;
aPrevInFlow->GetFrameState(&state);
if (state & NS_FRAME_HAS_CHILD_WITH_VIEW)
mState |= NS_FRAME_HAS_CHILD_WITH_VIEW;
}
return rv;
}
NS_IMETHODIMP
nsContainerFrame::SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
// NS_PRECONDITION(mFrames.IsEmpty(), "already initialized");
nsresult result;
if (!mFrames.IsEmpty()) {
// We already have child frames which means we've already been
// initialized
result = NS_ERROR_UNEXPECTED;
} else if (aListName) {
// All we know about is the unnamed principal child list
result = NS_ERROR_INVALID_ARG;
} else {
#ifdef NS_DEBUG
nsFrame::VerifyDirtyBitSet(aChildList);
#endif
mFrames.SetFrames(aChildList);
result = NS_OK;
}
return result;
}
NS_IMETHODIMP
nsContainerFrame::Destroy(nsIPresContext* aPresContext)
{
// Prevent event dispatch during destruction
nsIView* view;
GetView(aPresContext, &view);
if (nsnull != view) {
view->SetClientData(nsnull);
}
// Delete the primary child list
mFrames.DestroyFrames(aPresContext);
// Base class will destroy the frame
return nsFrame::Destroy(aPresContext);
}
/////////////////////////////////////////////////////////////////////////////
// Child frame enumeration
NS_IMETHODIMP
nsContainerFrame::FirstChild(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame** aFirstChild) const
{
NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
// We only know about the unnamed principal child list and the overflow
// list
if (nsnull == aListName) {
*aFirstChild = mFrames.FirstChild();
return NS_OK;
} else if (nsLayoutAtoms::overflowList == aListName) {
*aFirstChild = GetOverflowFrames(aPresContext, PR_FALSE);
return NS_OK;
} else {
*aFirstChild = nsnull;
return NS_ERROR_INVALID_ARG;
}
}
/////////////////////////////////////////////////////////////////////////////
// Painting/Events
NS_IMETHODIMP
nsContainerFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer, aFlags);
return NS_OK;
}
// Paint the children of a container, assuming nothing about the
// childrens spatial arrangement. Given relative positioning, negative
// margins, etc, that's probably a good thing.
//
// Note: aDirtyRect is in our coordinate system (and of course, child
// rect's are also in our coordinate system)
void
nsContainerFrame::PaintChildren(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
nsIFrame* kid = mFrames.FirstChild();
while (nsnull != kid) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid, aWhichLayer, aFlags);
kid->GetNextSibling(&kid);
}
}
// Paint one child frame
void
nsContainerFrame::PaintChild(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsIFrame* aFrame,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
nsIView *pView;
aFrame->GetView(aPresContext, &pView);
if (nsnull == pView) {
nsRect kidRect;
aFrame->GetRect(kidRect);
nsFrameState state;
aFrame->GetFrameState(&state);
// Compute the constrained damage area; set the overlap flag to
// PR_TRUE if any portion of the child frame intersects the
// dirty rect.
nsRect damageArea;
PRBool overlap;
if (NS_FRAME_OUTSIDE_CHILDREN & state) {
// If the child frame has children that leak out of our box
// then we don't constrain the damageArea to just the childs
// bounding rect.
damageArea = aDirtyRect;
overlap = PR_TRUE;
}
else {
// Compute the intersection of the dirty rect and the childs
// rect (both are in our coordinate space). This limits the
// damageArea to just the portion that intersects the childs
// rect.
overlap = damageArea.IntersectRect(aDirtyRect, kidRect);
#ifdef NS_DEBUG
if (!overlap && (0 == kidRect.width) && (0 == kidRect.height)) {
overlap = PR_TRUE;
}
#endif
}
if (overlap) {
// Translate damage area into the kids coordinate
// system. Translate rendering context into the kids
// coordinate system.
damageArea.x -= kidRect.x;
damageArea.y -= kidRect.y;
aRenderingContext.Translate(kidRect.x, kidRect.y);
// Paint the kid
aFrame->Paint(aPresContext, aRenderingContext, damageArea, aWhichLayer, aFlags);
// don't use PushState and PopState, because they're slow
aRenderingContext.Translate(-kidRect.x, -kidRect.y);
#ifdef NS_DEBUG
// Draw a border around the child
if (nsIFrameDebug::GetShowFrameBorders() && !kidRect.IsEmpty()) {
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.DrawRect(kidRect);
}
#endif
}
}
}
NS_IMETHODIMP
nsContainerFrame::GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame)
{
return GetFrameForPointUsing(aPresContext, aPoint, nsnull, aWhichLayer, (aWhichLayer == NS_FRAME_PAINT_LAYER_FOREGROUND), aFrame);
}
nsresult
nsContainerFrame::GetFrameForPointUsing(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsIAtom* aList,
nsFramePaintLayer aWhichLayer,
PRBool aConsiderSelf,
nsIFrame** aFrame)
{
nsIFrame *kid, *hit;
nsPoint tmp;
PRBool inThisFrame = mRect.Contains(aPoint);
if (! ((mState & NS_FRAME_OUTSIDE_CHILDREN) || inThisFrame ) ) {
return NS_ERROR_FAILURE;
}
FirstChild(aPresContext, aList, &kid);
*aFrame = nsnull;
tmp.MoveTo(aPoint.x - mRect.x, aPoint.y - mRect.y);
while (nsnull != kid) {
nsresult rv = kid->GetFrameForPoint(aPresContext, tmp, aWhichLayer, &hit);
if (NS_SUCCEEDED(rv) && hit) {
*aFrame = hit;
}
kid->GetNextSibling(&kid);
}
if (*aFrame) {
return NS_OK;
}
if ( inThisFrame && aConsiderSelf ) {
const nsStyleVisibility* vis =
(const nsStyleVisibility*)mStyleContext->GetStyleData(eStyleStruct_Visibility);
if (vis->IsVisible()) {
*aFrame = this;
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsContainerFrame::ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame)
{
nsIFrame* prevFrame;
nsIFrame* firstChild;
nsresult rv;
// Get the old frame's previous sibling frame
FirstChild(aPresContext, aListName, &firstChild);
nsFrameList frames(firstChild);
NS_ASSERTION(frames.ContainsFrame(aOldFrame), "frame is not a valid child frame");
prevFrame = frames.GetPrevSiblingFor(aOldFrame);
// Default implementation treats it like two separate operations
rv = RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
if (NS_SUCCEEDED(rv)) {
rv = InsertFrames(aPresContext, aPresShell, aListName, prevFrame, aNewFrame);
}
return rv;
}
NS_IMETHODIMP
nsContainerFrame::ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild)
{
// The container frame always generates a reflow command
// targeted at its child
// Note that even if this flag is already set, we still need to reflow the
// child because the frame may have more than one child
mState |= NS_FRAME_HAS_DIRTY_CHILDREN;
nsFrame::CreateAndPostReflowCommand(aPresShell, aChild,
nsIReflowCommand::ReflowDirty, nsnull, nsnull, nsnull);
return NS_OK;
}
/////////////////////////////////////////////////////////////////////////////
// Helper member functions
static PRBool
TranslatePointTo(nsPoint& aPoint, nsIView* aChildView, nsIView* aParentView)
{
do {
nsRect bounds;
aChildView->GetBounds(bounds);
aPoint.x += bounds.x;
aPoint.y += bounds.y;
aChildView->GetParent(aChildView);
} while (aChildView && (aChildView != aParentView));
return aChildView == aParentView;
}
/**
* Position the view associated with |aKidFrame|, if there is one. A
* container frame should call this method after positioning a frame,
* but before |Reflow|.
*/
void
nsContainerFrame::PositionFrameView(nsIPresContext* aPresContext,
nsIFrame* aKidFrame)
{
nsIView* view;
aKidFrame->GetView(aPresContext, &view);
if (view) {
// Position view relative to its parent, not relative to aKidFrame's
// frame which may not have a view
nsIView* parentView;
view->GetParent(parentView);
nsIView* containingView;
nsPoint origin;
aKidFrame->GetOffsetFromView(aPresContext, origin, &containingView);
nsCOMPtr<nsIViewManager> vm;
view->GetViewManager(*getter_AddRefs(vm));
if (containingView != parentView) {
// it is possible for parent view not to have a frame attached to it
// kind of an anonymous view. This happens with native scrollbars and
// the clip view. To fix this we need to go up and parentView chain
// until we find a view with client data. This is total HACK to fix
// the HACK below. COMBO box code should NOT be in the container code!!!
// And the case it looks from does not just happen for combo boxes. Native
// scrollframes get in this situation too!!
while(parentView) {
void *data = 0;
parentView->GetClientData(data);
if (data)
break;
nsRect bounds;
parentView->GetBounds(bounds);
origin.x -= bounds.x;
origin.y -= bounds.y;
parentView->GetParent(parentView);
}
if (containingView != parentView)
{
// Huh, the view's parent view isn't the same as the containing view.
// This happens for combo box drop-down frames.
//
// We have the origin in the coordinate space of the containing view,
// but we need it in the coordinate space of the parent view so do a
// view translation
NS_VERIFY(TranslatePointTo(origin, containingView, parentView), "translation failed");
}
}
if (parentView) {
// If the parent view is scrollable, then adjust the origin by
// the parent's scroll position.
nsIScrollableView* scrollable = nsnull;
CallQueryInterface(parentView, &scrollable);
if (scrollable) {
nscoord scrollX = 0, scrollY = 0;
scrollable->GetScrollPosition(scrollX, scrollY);
origin.x -= scrollX;
origin.y -= scrollY;
}
}
vm->MoveViewTo(view, origin.x, origin.y);
}
}
void
nsContainerFrame::SyncFrameViewAfterReflow(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIView* aView,
const nsRect* aCombinedArea,
PRUint32 aFlags)
{
if (aView) {
nsIViewManager *vm;
nsFrameState kidState;
nsSize frameSize;
aView->GetViewManager(vm);
aFrame->GetFrameState(&kidState);
aFrame->GetSize(frameSize);
// Make sure the view is sized and positioned correctly
if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) {
PositionFrameView(aPresContext, aFrame);
}
if (0 == (aFlags & NS_FRAME_NO_SIZE_VIEW)) {
// If the frame has child frames that stick outside the content
// area, then size the view large enough to include those child
// frames
if ((kidState & NS_FRAME_OUTSIDE_CHILDREN) && aCombinedArea) {
vm->ResizeView(aView, aCombinedArea->XMost(), aCombinedArea->YMost());
} else {
nscoord width, height;
aView->GetDimensions(&width, &height);
// If the width is unchanged and the height is not decreased then repaint only the
// newly exposed or contracted area, otherwise repaint the union of the old and new areas
// XXX: We currently invalidate the newly exposed areas only when the
// container frame's width is unchanged and the height is either unchanged or increased
// This is because some frames do not invalidate themselves properly. see bug 73825.
// Once bug 73825 is fixed, we should always pass PR_TRUE instead of
// frameSize.width == width && frameSize.height >= height.
vm->ResizeView(aView, frameSize.width, frameSize.height,
(frameSize.width == width && frameSize.height >= height));
}
}
const nsStyleBackground* bg;
const nsStyleVisibility* vis;
const nsStyleDisplay* display;
aFrame->GetStyleData(eStyleStruct_Background, (const nsStyleStruct*&)bg);
aFrame->GetStyleData(eStyleStruct_Visibility, (const nsStyleStruct*&)vis);
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
// Set the view's opacity
vm->SetViewOpacity(aView, vis->mOpacity);
// See if the view should be hidden or visible
PRBool viewIsVisible = PR_TRUE;
PRBool viewHasTransparentContent = (bg->mBackgroundFlags &
NS_STYLE_BG_COLOR_TRANSPARENT) == NS_STYLE_BG_COLOR_TRANSPARENT;
if (NS_STYLE_VISIBILITY_COLLAPSE == vis->mVisible) {
viewIsVisible = PR_FALSE;
}
else if (NS_STYLE_VISIBILITY_HIDDEN == vis->mVisible) {
// If it has a widget, hide the view because the widget can't deal with it
nsIWidget* widget = nsnull;
aView->GetWidget(widget);
if (widget) {
viewIsVisible = PR_FALSE;
NS_RELEASE(widget);
}
else {
// If it's a scroll frame, then hide the view. This means that
// child elements can't override their parent's visibility, but
// it's not practical to leave it visible in all cases because
// the scrollbars will be showing
nsIAtom* frameType;
aFrame->GetFrameType(&frameType);
if (frameType == nsLayoutAtoms::scrollFrame) {
viewIsVisible = PR_FALSE;
} else {
// If we're a container element, then leave the view visible, but
// mark it as having transparent content. The reason we need to
// do this is that child elements can override their parent's
// hidden visibility and be visible anyway
nsIFrame* firstChild;
aFrame->FirstChild(aPresContext, nsnull, &firstChild);
if (firstChild) {
// Not a left frame, so the view needs to be visible, but marked
// as having transparent content
viewHasTransparentContent = PR_TRUE;
} else {
// Leaf frame so go ahead and hide the view
viewIsVisible = PR_FALSE;
}
}
NS_IF_RELEASE(frameType);
}
}
// If the frame has visible content that overflows the content area, then we
// need the view marked as having transparent content
if (NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow) {
if (kidState & NS_FRAME_OUTSIDE_CHILDREN) {
viewHasTransparentContent = PR_TRUE;
}
}
// Make sure visibility is correct
if (0 == (aFlags & NS_FRAME_NO_VISIBILITY)) {
vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow :
nsViewVisibility_kHide);
}
// Make sure content transparency is correct
if (viewIsVisible) {
vm->SetViewContentTransparency(aView, viewHasTransparentContent);
}
// Make sure z-index is correct
PRInt32 zIndex = 0;
PRBool autoZIndex = PR_FALSE;
const nsStylePosition* position;
aFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if (position->mZIndex.GetUnit() == eStyleUnit_Integer) {
zIndex = position->mZIndex.GetIntValue();
} else if (position->mZIndex.GetUnit() == eStyleUnit_Auto) {
autoZIndex = PR_TRUE;
}
vm->SetViewZIndex(aView, zIndex);
vm->SetViewAutoZIndex(aView, autoZIndex);
// There are two types of clipping:
// - 'clip' which only applies to absolutely positioned elements, and is
// relative to the element's border edge. 'clip' applies to the entire
// element
// - 'overflow-clip' which only applies to block-level elements and replaced
// elements that have 'overflow' set to 'hidden'. 'overflow-clip' is relative
// to the content area and applies to content only (not border or background).
// Note that out-of-flow frames like floated or absolutely positioned frames
// are block-level, but we can't rely on the 'display' value being set correctly
// in the style context...
PRBool hasClip, hasOverflowClip;
PRBool isBlockLevel = display->IsBlockLevel() || (0 != (kidState & NS_FRAME_OUT_OF_FLOW));
hasClip = display->IsAbsolutelyPositioned() && (display->mClipFlags & NS_STYLE_CLIP_RECT);
hasOverflowClip = isBlockLevel && (display->mOverflow == NS_STYLE_OVERFLOW_HIDDEN);
if (hasClip || hasOverflowClip) {
nsRect clipRect, overflowClipRect;
if (hasClip) {
// Start with the 'auto' values and then factor in user specified values
clipRect.SetRect(0, 0, frameSize.width, frameSize.height);
if (display->mClipFlags & NS_STYLE_CLIP_RECT) {
if (0 == (NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags)) {
clipRect.y = display->mClip.y;
}
if (0 == (NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags)) {
clipRect.x = display->mClip.x;
}
if (0 == (NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags)) {
clipRect.width = display->mClip.width;
}
if (0 == (NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags)) {
clipRect.height = display->mClip.height;
}
}
}
if (hasOverflowClip) {
const nsStyleBorder* borderStyle;
const nsStylePadding* paddingStyle;
nsMargin border, padding;
aFrame->GetStyleData(eStyleStruct_Border, (const nsStyleStruct*&)borderStyle);
aFrame->GetStyleData(eStyleStruct_Padding, (const nsStyleStruct*&)paddingStyle);
// XXX We don't support the 'overflow-clip' property yet so just use the
// content area (which is the default value) as the clip shape
overflowClipRect.SetRect(0, 0, frameSize.width, frameSize.height);
borderStyle->GetBorder(border);
overflowClipRect.Deflate(border);
// XXX We need to handle percentage padding
if (paddingStyle->GetPadding(padding)) {
overflowClipRect.Deflate(padding);
}
}
// If both 'clip' and 'overflow-clip' apply then use the intersection
// of the two
if (hasClip && hasOverflowClip) {
clipRect.IntersectRect(clipRect, overflowClipRect);
}
// Set clipping of child views.
if (hasClip) {
aView->SetChildClip(clipRect.x, clipRect.y, clipRect.XMost(), clipRect.YMost());
} else {
aView->SetChildClip(overflowClipRect.x, overflowClipRect.y,
overflowClipRect.XMost(), overflowClipRect.YMost());
}
PRUint32 vflags;
aView->GetViewFlags(&vflags);
aView->SetViewFlags(vflags | NS_VIEW_PUBLIC_FLAG_CLIPCHILDREN);
} else {
// Remove clipping of child views.
PRUint32 vflags;
aView->GetViewFlags(&vflags);
aView->SetViewFlags(vflags & ~NS_VIEW_PUBLIC_FLAG_CLIPCHILDREN);
}
NS_RELEASE(vm);
}
}
/**
* Invokes the WillReflow() function, positions the frame and its view (if
* requested), and then calls Reflow(). If the reflow succeeds and the child
* frame is complete, deletes any next-in-flows using DeleteChildsNextInFlow()
*/
nsresult
nsContainerFrame::ReflowChild(nsIFrame* aKidFrame,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nscoord aX,
nscoord aY,
PRUint32 aFlags,
nsReflowStatus& aStatus)
{
NS_PRECONDITION(aReflowState.frame == aKidFrame, "bad reflow state");
nsresult result;
#ifdef DEBUG
nsSize* saveMaxElementSize = aDesiredSize.maxElementSize;
#ifdef REALLY_NOISY_MAX_ELEMENT_SIZE
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = nscoord(0xdeadbeef);
aDesiredSize.maxElementSize->height = nscoord(0xdeadbeef);
}
#endif
#endif
// Send the WillReflow() notification, and position the child frame
// and its view if requested
aKidFrame->WillReflow(aPresContext);
if (0 == (aFlags & NS_FRAME_NO_MOVE_FRAME)) {
aKidFrame->MoveTo(aPresContext, aX, aY);
}
if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) {
PositionFrameView(aPresContext, aKidFrame);
}
// Reflow the child frame
result = aKidFrame->Reflow(aPresContext, aDesiredSize, aReflowState,
aStatus);
#ifdef DEBUG
if (saveMaxElementSize != aDesiredSize.maxElementSize) {
printf("nsContainerFrame: ");
nsFrame::ListTag(stdout, aKidFrame);
printf(" changed the maxElementSize *pointer* (baaaad boy!)\n");
}
#ifdef REALLY_NOISY_MAX_ELEMENT_SIZE
if ((nsnull != aDesiredSize.maxElementSize) &&
((nscoord(0xdeadbeef) == aDesiredSize.maxElementSize->width) ||
(nscoord(0xdeadbeef) == aDesiredSize.maxElementSize->height))) {
printf("nsContainerFrame: ");
nsFrame::ListTag(stdout, aKidFrame);
printf(" didn't set max-element-size!\n");
aDesiredSize.maxElementSize->width = 0;
aDesiredSize.maxElementSize->height = 0;
}
#endif
#endif
// If the reflow was successful and the child frame is complete, delete any
// next-in-flows
if (NS_SUCCEEDED(result) && NS_FRAME_IS_COMPLETE(aStatus)) {
nsIFrame* kidNextInFlow;
aKidFrame->GetNextInFlow(&kidNextInFlow);
if (nsnull != kidNextInFlow) {
// Remove all of the childs next-in-flows. Make sure that we ask
// the right parent to do the removal (it's possible that the
// parent is not this because we are executing pullup code)
nsIFrame* parent;
aKidFrame->GetParent(&parent);
((nsContainerFrame*)parent)->DeleteChildsNextInFlow(aPresContext,
aKidFrame);
}
}
return result;
}
/**
* Position the views of |aFrame|'s descendants. A container frame
* should call this method if it moves a frame after |Reflow|.
*/
void
nsContainerFrame::PositionChildViews(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsFrameState frameState;
aFrame->GetFrameState(&frameState);
if (! ((frameState & NS_FRAME_HAS_CHILD_WITH_VIEW) == NS_FRAME_HAS_CHILD_WITH_VIEW)) {
return;
}
nsIAtom* childListName = nsnull;
PRInt32 childListIndex = 0;
do {
// Recursively walk aFrame's child frames
nsIFrame* childFrame;
aFrame->FirstChild(aPresContext, childListName, &childFrame);
while (childFrame) {
// Position the frame's view (if it has one) and recursively
// process its children
PositionFrameView(aPresContext, childFrame);
PositionChildViews(aPresContext, childFrame);
// Get the next sibling child frame
childFrame->GetNextSibling(&childFrame);
}
NS_IF_RELEASE(childListName);
aFrame->GetAdditionalChildListName(childListIndex++, &childListName);
} while (childListName);
}
/**
* The second half of frame reflow. Does the following:
* - sets the frame's bounds
* - sizes and positions (if requested) the frame's view. If the frame's final
* position differs from the current position and the frame itself does not
* have a view, then any child frames with views are positioned so they stay
* in sync
* - sets the view's visibility, opacity, content transparency, and clip
* - invoked the DidReflow() function
*
* Flags:
* NS_FRAME_NO_MOVE_FRAME - don't move the frame. aX and aY are ignored in this
* case. Also implies NS_FRAME_NO_MOVE_VIEW
* NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
* don't want to automatically sync the frame and view
* NS_FRAME_NO_SIZE_VIEW - don't size the frame's view
*/
nsresult
nsContainerFrame::FinishReflowChild(nsIFrame* aKidFrame,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nscoord aX,
nscoord aY,
PRUint32 aFlags)
{
nsPoint curOrigin;
nsRect bounds(aX, aY, aDesiredSize.width, aDesiredSize.height);
aKidFrame->GetOrigin(curOrigin);
aKidFrame->SetRect(aPresContext, bounds);
nsIView* view;
aKidFrame->GetView(aPresContext, &view);
if (view) {
// Make sure the frame's view is properly sized and positioned and has
// things like opacity correct
SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
&aDesiredSize.mOverflowArea,
aFlags);
}
else if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW) &&
((curOrigin.x != aX) || (curOrigin.y != aY))) {
// If the frame has moved, then we need to make sure any child views are
// correctly positioned
PositionChildViews(aPresContext, aKidFrame);
}
return aKidFrame->DidReflow(aPresContext, NS_FRAME_REFLOW_FINISHED);
}
/**
* Remove and delete aChild's next-in-flow(s). Updates the sibling and flow
* pointers
*
* @param aChild child this child's next-in-flow
* @return PR_TRUE if successful and PR_FALSE otherwise
*/
void
nsContainerFrame::DeleteChildsNextInFlow(nsIPresContext* aPresContext,
nsIFrame* aChild)
{
NS_PRECONDITION(mFrames.ContainsFrame(aChild), "bad geometric parent");
nsIFrame* nextInFlow;
nsContainerFrame* parent;
aChild->GetNextInFlow(&nextInFlow);
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
nextInFlow->GetParent((nsIFrame**)&parent);
// If the next-in-flow has a next-in-flow then delete it, too (and
// delete it first).
nsIFrame* nextNextInFlow;
nextInFlow->GetNextInFlow(&nextNextInFlow);
if (nsnull != nextNextInFlow) {
parent->DeleteChildsNextInFlow(aPresContext, nextInFlow);
}
#ifdef IBMBIDI
nsIFrame* nextBidi;
aChild->GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi,
(void**) &nextBidi,sizeof(nextBidi));
if (nextBidi == nextInFlow) {
return;
}
#endif // IBMBIDI
// Disconnect the next-in-flow from the flow list
nsSplittableFrame::BreakFromPrevFlow(nextInFlow);
// Take the next-in-flow out of the parent's child list
PRBool result = parent->mFrames.RemoveFrame(nextInFlow);
if (!result) {
// We didn't find the child in the parent's principal child list.
// Maybe it's on the overflow list?
nsFrameList overflowFrames(parent->GetOverflowFrames(aPresContext, PR_TRUE));
if (overflowFrames.IsEmpty() || !overflowFrames.RemoveFrame(nextInFlow)) {
NS_ASSERTION(result, "failed to remove frame");
}
// Set the overflow property again
if (overflowFrames.NotEmpty()) {
parent->SetOverflowFrames(aPresContext, overflowFrames.FirstChild());
}
}
// Delete the next-in-flow frame
nextInFlow->Destroy(aPresContext);
#ifdef NS_DEBUG
aChild->GetNextInFlow(&nextInFlow);
NS_POSTCONDITION(nsnull == nextInFlow, "non null next-in-flow");
#endif
}
nsIFrame*
nsContainerFrame::GetOverflowFrames(nsIPresContext* aPresContext,
PRBool aRemoveProperty) const
{
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
if (presShell) {
nsCOMPtr<nsIFrameManager> frameManager;
presShell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
PRUint32 options = 0;
void* value;
if (aRemoveProperty) {
options |= NS_IFRAME_MGR_REMOVE_PROP;
}
frameManager->GetFrameProperty((nsIFrame*)this, nsLayoutAtoms::overflowProperty,
options, &value);
return (nsIFrame*)value;
}
}
return nsnull;
}
// Destructor function for the overflow frame property
static void
DestroyOverflowFrames(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIAtom* aPropertyName,
void* aPropertyValue)
{
if (aPropertyValue) {
nsFrameList frames((nsIFrame*)aPropertyValue);
frames.DestroyFrames(aPresContext);
}
}
nsresult
nsContainerFrame::SetOverflowFrames(nsIPresContext* aPresContext,
nsIFrame* aOverflowFrames)
{
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = NS_ERROR_FAILURE;
aPresContext->GetShell(getter_AddRefs(presShell));
if (presShell) {
nsCOMPtr<nsIFrameManager> frameManager;
presShell->GetFrameManager(getter_AddRefs(frameManager));
if (frameManager) {
rv = frameManager->SetFrameProperty(this, nsLayoutAtoms::overflowProperty,
aOverflowFrames, DestroyOverflowFrames);
// Verify that we didn't overwrite an existing overflow list
NS_ASSERTION(rv != NS_IFRAME_MGR_PROP_OVERWRITTEN,
"existing overflow list");
}
}
return rv;
}
/**
* Push aFromChild and its next siblings to the next-in-flow. Change the
* geometric parent of each frame that's pushed. If there is no next-in-flow
* the frames are placed on the overflow list (and the geometric parent is
* left unchanged).
*
* Updates the next-in-flow's child count. Does <b>not</b> update the
* pusher's child count.
*
* @param aFromChild the first child frame to push. It is disconnected from
* aPrevSibling
* @param aPrevSibling aFromChild's previous sibling. Must not be null. It's
* an error to push a parent's first child frame
*/
void
nsContainerFrame::PushChildren(nsIPresContext* aPresContext,
nsIFrame* aFromChild,
nsIFrame* aPrevSibling)
{
NS_PRECONDITION(nsnull != aFromChild, "null pointer");
NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child");
#ifdef NS_DEBUG
nsIFrame* prevNextSibling;
aPrevSibling->GetNextSibling(&prevNextSibling);
NS_PRECONDITION(prevNextSibling == aFromChild, "bad prev sibling");
#endif
// Disconnect aFromChild from its previous sibling
aPrevSibling->SetNextSibling(nsnull);
if (nsnull != mNextInFlow) {
// XXX This is not a very good thing to do. If it gets removed
// then remove the copy of this routine that doesn't do this from
// nsInlineFrame.
nsContainerFrame* nextInFlow = (nsContainerFrame*)mNextInFlow;
// When pushing and pulling frames we need to check for whether any
// views need to be reparented.
for (nsIFrame* f = aFromChild; f; f->GetNextSibling(&f)) {
nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, this, mNextInFlow);
}
nextInFlow->mFrames.InsertFrames(mNextInFlow, nsnull, aFromChild);
}
else {
// Add the frames to our overflow list
SetOverflowFrames(aPresContext, aFromChild);
}
}
/**
* Moves any frames on the overflwo lists (the prev-in-flow's overflow list and
* the receiver's overflow list) to the child list.
*
* Updates this frame's child count and content mapping.
*
* @return PR_TRUE if any frames were moved and PR_FALSE otherwise
*/
PRBool
nsContainerFrame::MoveOverflowToChildList(nsIPresContext* aPresContext)
{
PRBool result = PR_FALSE;
// Check for an overflow list with our prev-in-flow
nsContainerFrame* prevInFlow = (nsContainerFrame*)mPrevInFlow;
if (nsnull != prevInFlow) {
nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext,
PR_TRUE);
if (prevOverflowFrames) {
NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list");
// When pushing and pulling frames we need to check for whether any
// views need to be reparented.
for (nsIFrame* f = prevOverflowFrames; f; f->GetNextSibling(&f)) {
nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, prevInFlow, this);
}
mFrames.InsertFrames(this, nsnull, prevOverflowFrames);
result = PR_TRUE;
}
}
// It's also possible that we have an overflow list for ourselves
nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE);
if (overflowFrames) {
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
mFrames.AppendFrames(nsnull, overflowFrames);
result = PR_TRUE;
}
return result;
}
/////////////////////////////////////////////////////////////////////////////
// Debugging
#ifdef NS_DEBUG
NS_IMETHODIMP
nsContainerFrame::List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
{
IndentBy(out, aIndent);
ListTag(out);
#ifdef DEBUG_waterson
fprintf(out, " [parent=%p]", NS_STATIC_CAST(void*, mParent));
#endif
nsIView* view;
GetView(aPresContext, &view);
if (nsnull != view) {
fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, view));
}
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
}
if (nsnull != mPrevInFlow) {
fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, mPrevInFlow));
}
if (nsnull != mNextInFlow) {
fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, mNextInFlow));
}
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
fprintf(out, " [content=%p]", NS_STATIC_CAST(void*, mContent));
fprintf(out, " [sc=%p]", NS_STATIC_CAST(void*, mStyleContext));
// Output the children
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
PRBool outputOneList = PR_FALSE;
do {
nsIFrame* kid;
FirstChild(aPresContext, listName, &kid);
if (nsnull != kid) {
if (outputOneList) {
IndentBy(out, aIndent);
}
outputOneList = PR_TRUE;
nsAutoString tmp;
if (nsnull != listName) {
listName->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), out);
}
fputs("<\n", out);
while (nsnull != kid) {
// Verify the child frame's parent frame pointer is correct
nsIFrame* parentFrame;
kid->GetParent(&parentFrame);
NS_ASSERTION(parentFrame == (nsIFrame*)this, "bad parent frame pointer");
// Have the child frame list
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(kid->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
frameDebug->List(aPresContext, out, aIndent + 1);
}
kid->GetNextSibling(&kid);
}
IndentBy(out, aIndent);
fputs(">\n", out);
}
NS_IF_RELEASE(listName);
GetAdditionalChildListName(listIndex++, &listName);
} while(nsnull != listName);
if (!outputOneList) {
fputs("<>\n", out);
}
return NS_OK;
}
NS_IMETHODIMP
nsContainerFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = sizeof(*this);
return NS_OK;
}
#endif
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