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gecko-dev/layout/generic/nsHTMLContainerFrame.cpp

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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):
*
* 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 "nsHTMLContainerFrame.h"
#include "nsIRenderingContext.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIContent.h"
#include "nsLayoutAtoms.h"
#include "nsCSSAnonBoxes.h"
#include "nsIWidget.h"
#include "nsILinkHandler.h"
#include "nsHTMLValue.h"
#include "nsGUIEvent.h"
#include "nsIDocument.h"
#include "nsIURL.h"
#include "nsPlaceholderFrame.h"
#include "nsIHTMLContent.h"
#include "nsHTMLParts.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsViewsCID.h"
#include "nsIDOMEvent.h"
#include "nsIScrollableView.h"
#include "nsWidgetsCID.h"
#include "nsIStyleSet.h"
#include "nsCOMPtr.h"
#include "nsIDeviceContext.h"
#include "nsIFontMetrics.h"
#include "nsReflowPath.h"
static NS_DEFINE_CID(kCChildCID, NS_CHILD_CID);
NS_IMETHODIMP
nsHTMLContainerFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
if (NS_FRAME_IS_UNFLOWABLE & mState) {
return NS_OK;
}
// Paint inline element backgrounds in the foreground layer, but
// others in the background (bug 36710). (nsInlineFrame::Paint does
// this differently.)
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer, aFlags);
return NS_OK;
}
void
nsHTMLContainerFrame::PaintDecorationsAndChildren(
nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRBool aIsBlock,
PRUint32 aFlags)
{
// Do standards mode painting of 'text-decoration's: under+overline
// behind children, line-through in front. For Quirks mode, see
// nsTextFrame::PaintTextDecorations. (See bug 1777.)
nscolor underColor, overColor, strikeColor;
PRUint8 decorations = NS_STYLE_TEXT_DECORATION_NONE;
nsCOMPtr<nsIFontMetrics> fm;
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
PRBool isVisible;
if (eCompatibility_NavQuirks != mode &&
NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer &&
NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext,
PR_TRUE, &isVisible)) &&
isVisible) {
GetTextDecorations(aPresContext, aIsBlock, decorations, underColor,
overColor, strikeColor);
if (decorations & (NS_STYLE_TEXT_DECORATION_UNDERLINE |
NS_STYLE_TEXT_DECORATION_OVERLINE |
NS_STYLE_TEXT_DECORATION_LINE_THROUGH)) {
const nsStyleFont* font;
::GetStyleData(this, &font);
NS_ASSERTION(font->mFont.decorations == NS_FONT_DECORATION_NONE,
"fonts on style structs shouldn't have decorations");
// XXX This is relatively slow and shouldn't need to be used here.
nsCOMPtr<nsIDeviceContext> deviceContext;
aRenderingContext.GetDeviceContext(*getter_AddRefs(deviceContext));
nsCOMPtr<nsIFontMetrics> normalFont;
deviceContext->GetMetricsFor(font->mFont, *getter_AddRefs(fm));
}
if (decorations & NS_STYLE_TEXT_DECORATION_UNDERLINE) {
PaintTextDecorations(aRenderingContext, fm,
NS_STYLE_TEXT_DECORATION_UNDERLINE, underColor);
}
if (decorations & NS_STYLE_TEXT_DECORATION_OVERLINE) {
PaintTextDecorations(aRenderingContext, fm,
NS_STYLE_TEXT_DECORATION_OVERLINE, overColor);
}
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect,
aWhichLayer, aFlags);
if (decorations & NS_STYLE_TEXT_DECORATION_LINE_THROUGH) {
PaintTextDecorations(aRenderingContext, fm,
NS_STYLE_TEXT_DECORATION_LINE_THROUGH, strikeColor);
}
}
static PRBool
HasTextFrameDescendant(nsIPresContext* aPresContext, nsIFrame* parent);
void
nsHTMLContainerFrame::GetTextDecorations(nsIPresContext* aPresContext,
PRBool aIsBlock,
PRUint8& aDecorations,
nscolor& aUnderColor,
nscolor& aOverColor,
nscolor& aStrikeColor)
{
aDecorations = NS_STYLE_TEXT_DECORATION_NONE;
if (!mStyleContext->HasTextDecorations()) {
// This is a neccessary, but not sufficient, condition for text
// decorations.
return;
}
// A mask of all possible decorations.
PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_UNDERLINE |
NS_STYLE_TEXT_DECORATION_OVERLINE |
NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
const nsStyleTextReset* styleText;
::GetStyleData(mStyleContext, &styleText);
if (!aIsBlock) {
aDecorations = styleText->mTextDecoration & decorMask;
if (aDecorations) {
const nsStyleColor* styleColor;
::GetStyleData(mStyleContext, &styleColor);
aUnderColor = styleColor->mColor;
aOverColor = styleColor->mColor;
aStrikeColor = styleColor->mColor;
}
}
else {
// walk tree
for (nsIFrame *frame = this; frame && decorMask; frame->GetParent(&frame)) {
// find text-decorations. "Inherit" from parent *block* frames
nsStyleContext* styleContext = frame->GetStyleContext();
const nsStyleDisplay* styleDisplay;
::GetStyleData(styleContext, &styleDisplay);
if (!styleDisplay->IsBlockLevel() &&
styleDisplay->mDisplay != NS_STYLE_DISPLAY_TABLE_CELL) {
// If an inline frame is discovered while walking up the tree,
// we should stop according to CSS3 draft. CSS2 is rather vague
// about this.
break;
}
::GetStyleData(styleContext, &styleText);
PRUint8 decors = decorMask & styleText->mTextDecoration;
if (decors) {
// A *new* text-decoration is found.
const nsStyleColor* styleColor;
::GetStyleData(styleContext, &styleColor);
if (NS_STYLE_TEXT_DECORATION_UNDERLINE & decors) {
aUnderColor = styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
aDecorations |= NS_STYLE_TEXT_DECORATION_UNDERLINE;
}
if (NS_STYLE_TEXT_DECORATION_OVERLINE & decors) {
aOverColor = styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
aDecorations |= NS_STYLE_TEXT_DECORATION_OVERLINE;
}
if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & decors) {
aStrikeColor = styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
aDecorations |= NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
}
}
}
}
if (aDecorations) {
// If this frame contains no text, we're required to ignore this property
if (!HasTextFrameDescendant(aPresContext, this)) {
aDecorations = NS_STYLE_TEXT_DECORATION_NONE;
}
}
}
static PRBool
HasTextFrameDescendant(nsIPresContext* aPresContext, nsIFrame* aParent)
{
nsIFrame* kid = nsnull;
nsCOMPtr<nsIAtom> frameType;
for (aParent->FirstChild(aPresContext, nsnull, &kid); kid;
kid->GetNextSibling(&kid))
{
kid->GetFrameType(getter_AddRefs(frameType));
if (frameType == nsLayoutAtoms::textFrame) {
// This is only a candidate. We need to determine if this text
// frame is empty, as in containing only (non-pre) whitespace.
// See bug 20163.
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
const nsStyleText* styleText;
::GetStyleData(kid, &styleText);
// XXXldb This is the wrong way to set |isPre|.
PRBool isPre = NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace ||
NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace;
PRBool isEmpty;
kid->IsEmpty(mode, isPre, &isEmpty);
if (!isEmpty) {
return PR_TRUE;
}
}
if (HasTextFrameDescendant(aPresContext, kid)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
/*virtual*/ void
nsHTMLContainerFrame::PaintTextDecorationLines(
nsIRenderingContext& aRenderingContext,
nscolor aColor,
nscoord aOffset,
nscoord aAscent,
nscoord aSize)
{
nsMargin bp;
CalcBorderPadding(bp);
aRenderingContext.SetColor(aColor);
nscoord innerWidth = mRect.width - bp.left - bp.right;
aRenderingContext.FillRect(bp.left,
bp.top + aAscent - aOffset, innerWidth, aSize);
}
void
nsHTMLContainerFrame::PaintTextDecorations(
nsIRenderingContext& aRenderingContext,
nsIFontMetrics* aFontMetrics,
PRUint8 aDecoration,
nscolor aColor)
{
nscoord ascent, offset, size;
aFontMetrics->GetMaxAscent(ascent);
if (aDecoration &
(NS_STYLE_TEXT_DECORATION_UNDERLINE
| NS_STYLE_TEXT_DECORATION_OVERLINE)) {
aFontMetrics->GetUnderline(offset, size);
if (NS_STYLE_TEXT_DECORATION_UNDERLINE & aDecoration) {
PaintTextDecorationLines(aRenderingContext, aColor, offset, ascent, size);
}
else if (NS_STYLE_TEXT_DECORATION_OVERLINE & aDecoration) {
PaintTextDecorationLines(aRenderingContext, aColor, ascent, ascent, size);
}
}
else if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & aDecoration) {
aFontMetrics->GetStrikeout(offset, size);
PaintTextDecorationLines(aRenderingContext, aColor, offset, ascent, size);
}
}
/**
* Create a next-in-flow for aFrame. Will return the newly created
* frame in aNextInFlowResult <b>if and only if</b> a new frame is
* created; otherwise nsnull is returned in aNextInFlowResult.
*/
nsresult
nsHTMLContainerFrame::CreateNextInFlow(nsIPresContext* aPresContext,
nsIFrame* aOuterFrame,
nsIFrame* aFrame,
nsIFrame*& aNextInFlowResult)
{
aNextInFlowResult = nsnull;
nsIFrame* nextInFlow;
aFrame->GetNextInFlow(&nextInFlow);
if (nsnull == nextInFlow) {
// Create a continuation frame for the child frame and insert it
// into our lines child list.
nsIFrame* nextFrame;
aFrame->GetNextSibling(&nextFrame);
nsIPresShell* presShell;
nsIStyleSet* styleSet;
aPresContext->GetShell(&presShell);
presShell->GetStyleSet(&styleSet);
NS_RELEASE(presShell);
styleSet->CreateContinuingFrame(aPresContext, aFrame, aOuterFrame, &nextInFlow);
NS_RELEASE(styleSet);
if (nsnull == nextInFlow) {
return NS_ERROR_OUT_OF_MEMORY;
}
aFrame->SetNextSibling(nextInFlow);
nextInFlow->SetNextSibling(nextFrame);
NS_FRAME_LOG(NS_FRAME_TRACE_NEW_FRAMES,
("nsHTMLContainerFrame::MaybeCreateNextInFlow: frame=%p nextInFlow=%p",
aFrame, nextInFlow));
aNextInFlowResult = nextInFlow;
}
return NS_OK;
}
static nsresult
ReparentFrameViewTo(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIViewManager* aViewManager,
nsIView* aNewParentView,
nsIView* aOldParentView)
{
nsIView* view;
// XXX What to do about placeholder views for "position: fixed" elements?
// They should be reparented too.
// Does aFrame have a view?
aFrame->GetView(aPresContext, &view);
if (view) {
// Verify that the current parent view is what we think it is
//nsIView* parentView;
//NS_ASSERTION(parentView == aOldParentView, "unexpected parent view");
aViewManager->RemoveChild(view);
// The view will remember the Z-order and other attributes that have been set on it.
// XXX Pretend this view is last of the parent's views in document order
aViewManager->InsertChild(aNewParentView, view, nsnull, PR_TRUE);
} else {
// Iterate the child frames, and check each child frame to see if it has
// a view
nsIFrame* childFrame;
aFrame->FirstChild(aPresContext, nsnull, &childFrame);
while (childFrame) {
ReparentFrameViewTo(aPresContext, childFrame, aViewManager, aNewParentView, aOldParentView);
childFrame->GetNextSibling(&childFrame);
}
// Also check the overflow-list
aFrame->FirstChild(aPresContext, nsLayoutAtoms::overflowList, &childFrame);
while (childFrame) {
ReparentFrameViewTo(aPresContext, childFrame, aViewManager, aNewParentView, aOldParentView);
childFrame->GetNextSibling(&childFrame);
}
// Also check the floater-list
aFrame->FirstChild(aPresContext, nsLayoutAtoms::floaterList, &childFrame);
while (childFrame) {
ReparentFrameViewTo(aPresContext, childFrame, aViewManager, aNewParentView, aOldParentView);
childFrame->GetNextSibling(&childFrame);
}
}
return NS_OK;
}
// Helper function that returns the nearest view to this frame. Checks
// this frame, its parent frame, its parent frame, ...
static nsIView*
GetClosestViewFor(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
NS_PRECONDITION(aFrame, "null frame pointer");
nsIView* view;
do {
aFrame->GetView(aPresContext, &view);
if (view) {
break;
}
aFrame->GetParent(&aFrame);
} while (aFrame);
NS_POSTCONDITION(view, "no containing view");
return view;
}
nsresult
nsHTMLContainerFrame::ReparentFrameView(nsIPresContext* aPresContext,
nsIFrame* aChildFrame,
nsIFrame* aOldParentFrame,
nsIFrame* aNewParentFrame)
{
NS_PRECONDITION(aChildFrame, "null child frame pointer");
NS_PRECONDITION(aOldParentFrame, "null old parent frame pointer");
NS_PRECONDITION(aNewParentFrame, "null new parent frame pointer");
NS_PRECONDITION(aOldParentFrame != aNewParentFrame, "same old and new parent frame");
nsIView* childView;
nsIView* oldParentView;
nsIView* newParentView;
// This code is called often and we need it to be as fast as possible, so
// see if we can trivially detect that no work needs to be done
aChildFrame->GetView(aPresContext, &childView);
if (!childView) {
// Child frame doesn't have a view. See if it has any child frames
nsIFrame* firstChild;
aChildFrame->FirstChild(aPresContext, nsnull, &firstChild);
if (!firstChild) {
return NS_OK;
}
}
// See if either the old parent frame or the new parent frame have a view
aOldParentFrame->GetView(aPresContext, &oldParentView);
aNewParentFrame->GetView(aPresContext, &newParentView);
if (!oldParentView && !newParentView) {
// Walk up both the old parent frame and the new parent frame nodes
// stopping when we either find a common parent or views for one
// or both of the frames.
//
// This works well in the common case where we push/pull and the old parent
// frame and the new parent frame are part of the same flow. They will
// typically be the same distance (height wise) from the
do {
aOldParentFrame->GetParent(&aOldParentFrame);
aNewParentFrame->GetParent(&aNewParentFrame);
// We should never walk all the way to the root frame without finding
// a view
NS_ASSERTION(aOldParentFrame && aNewParentFrame, "didn't find view");
// See if we reached a common parent
if (aOldParentFrame == aNewParentFrame) {
break;
}
// Get the views
aOldParentFrame->GetView(aPresContext, &oldParentView);
aNewParentFrame->GetView(aPresContext, &newParentView);
} while (!(oldParentView || newParentView));
}
// See if we found a common parent frame
if (aOldParentFrame == aNewParentFrame) {
// We found a common parent and there are no views between the old parent
// and the common parent or the new parent frame and the common parent.
// Because neither the old parent frame nor the new parent frame have views,
// then any child views don't need reparenting
return NS_OK;
}
// We found views for one or both of the parent frames before we found a
// common parent
NS_ASSERTION(oldParentView || newParentView, "internal error");
if (!oldParentView) {
oldParentView = GetClosestViewFor(aPresContext, aOldParentFrame);
}
if (!newParentView) {
newParentView = GetClosestViewFor(aPresContext, aNewParentFrame);
}
// See if the old parent frame and the new parent frame are in the
// same view sub-hierarchy. If they are then we don't have to do
// anything
if (oldParentView != newParentView) {
nsCOMPtr<nsIViewManager> viewManager;
oldParentView->GetViewManager(*getter_AddRefs(viewManager));
// They're not so we need to reparent any child views
return ReparentFrameViewTo(aPresContext, aChildFrame, viewManager, newParentView,
oldParentView);
}
return NS_OK;
}
nsresult
nsHTMLContainerFrame::ReparentFrameViewList(nsIPresContext* aPresContext,
nsIFrame* aChildFrameList,
nsIFrame* aOldParentFrame,
nsIFrame* aNewParentFrame)
{
NS_PRECONDITION(aChildFrameList, "null child frame list");
NS_PRECONDITION(aOldParentFrame, "null old parent frame pointer");
NS_PRECONDITION(aNewParentFrame, "null new parent frame pointer");
NS_PRECONDITION(aOldParentFrame != aNewParentFrame, "same old and new parent frame");
nsIView* oldParentView;
nsIView* newParentView;
// See if either the old parent frame or the new parent frame have a view
aOldParentFrame->GetView(aPresContext, &oldParentView);
aNewParentFrame->GetView(aPresContext, &newParentView);
if (!oldParentView && !newParentView) {
// Walk up both the old parent frame and the new parent frame nodes
// stopping when we either find a common parent or views for one
// or both of the frames.
//
// This works well in the common case where we push/pull and the old parent
// frame and the new parent frame are part of the same flow. They will
// typically be the same distance (height wise) from the
do {
aOldParentFrame->GetParent(&aOldParentFrame);
aNewParentFrame->GetParent(&aNewParentFrame);
// We should never walk all the way to the root frame without finding
// a view
NS_ASSERTION(aOldParentFrame && aNewParentFrame, "didn't find view");
// See if we reached a common parent
if (aOldParentFrame == aNewParentFrame) {
break;
}
// Get the views
aOldParentFrame->GetView(aPresContext, &oldParentView);
aNewParentFrame->GetView(aPresContext, &newParentView);
} while (!(oldParentView || newParentView));
}
// See if we found a common parent frame
if (aOldParentFrame == aNewParentFrame) {
// We found a common parent and there are no views between the old parent
// and the common parent or the new parent frame and the common parent.
// Because neither the old parent frame nor the new parent frame have views,
// then any child views don't need reparenting
return NS_OK;
}
// We found views for one or both of the parent frames before we found a
// common parent
NS_ASSERTION(oldParentView || newParentView, "internal error");
if (!oldParentView) {
oldParentView = GetClosestViewFor(aPresContext, aOldParentFrame);
}
if (!newParentView) {
newParentView = GetClosestViewFor(aPresContext, aNewParentFrame);
}
// See if the old parent frame and the new parent frame are in the
// same view sub-hierarchy. If they are then we don't have to do
// anything
if (oldParentView != newParentView) {
nsCOMPtr<nsIViewManager> viewManager;
oldParentView->GetViewManager(*getter_AddRefs(viewManager));
// They're not so we need to reparent any child views
for (nsIFrame* f = aChildFrameList; f; f->GetNextSibling(&f)) {
ReparentFrameViewTo(aPresContext, f, viewManager, newParentView,
oldParentView);
}
}
return NS_OK;
}
nsresult
nsHTMLContainerFrame::CreateViewForFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsStyleContext* aStyleContext,
nsIFrame* aContentParentFrame,
PRBool aForce)
{
nsIView* view;
aFrame->GetView(aPresContext, &view);
if (nsnull != view) {
return NS_OK;
}
// If we don't yet have a view, see if we need a view
if (!(aForce || FrameNeedsView(aPresContext, aFrame, aStyleContext))) {
// don't need a view
return NS_OK;
}
// Create a view
nsIFrame* parent = nsnull;
aFrame->GetParentWithView(aPresContext, &parent);
NS_ASSERTION(parent, "GetParentWithView failed");
nsIView* parentView = nsnull;
parent->GetView(aPresContext, &parentView);
NS_ASSERTION(parentView, "no parent with view");
// Create a view
static NS_DEFINE_CID(kViewCID, NS_VIEW_CID);
nsresult result = CallCreateInstance(kViewCID, &view);
if (NS_FAILED(result)) {
return result;
}
nsCOMPtr<nsIViewManager> viewManager;
parentView->GetViewManager(*getter_AddRefs(viewManager));
NS_ASSERTION(nsnull != viewManager, "null view manager");
// Initialize the view
nsRect bounds;
aFrame->GetRect(bounds);
view->Init(viewManager, bounds, parentView);
SyncFrameViewProperties(aPresContext, aFrame, aStyleContext, view);
// Insert the view into the view hierarchy. If the parent view is a
// scrolling view we need to do this differently
nsIScrollableView* scrollingView;
if (NS_SUCCEEDED(CallQueryInterface(parentView, &scrollingView))) {
scrollingView->SetScrolledView(view);
} else {
// XXX Drop it at the end of the document order until we can do better
viewManager->InsertChild(parentView, view, nsnull, PR_TRUE);
if (nsnull != aContentParentFrame) {
// If, for some reason, GetView below fails to initialize zParentView,
// then ensure that we completely bypass InsertZPlaceholder below.
// The effect will be as if we never knew about aContentParentFrame
// in the first place, so at least this code won't be doing any damage.
nsIView* zParentView = parentView;
aContentParentFrame->GetView(aPresContext, &zParentView);
if (nsnull == zParentView) {
nsIFrame* zParentFrame = nsnull;
aContentParentFrame->GetParentWithView(aPresContext, &zParentFrame);
NS_ASSERTION(zParentFrame, "GetParentWithView failed");
zParentFrame->GetView(aPresContext, &zParentView);
NS_ASSERTION(zParentView, "no parent with view");
}
if (zParentView != parentView) {
viewManager->InsertZPlaceholder(zParentView, view, nsnull, PR_TRUE);
}
}
}
// XXX If it's fixed positioned, then create a widget so it floats
// above the scrolling area
const nsStyleDisplay* display;
::GetStyleData(aStyleContext, &display);
if (NS_STYLE_POSITION_FIXED == display->mPosition) {
view->CreateWidget(kCChildCID);
}
// Remember our view
aFrame->SetView(aPresContext, view);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLContainerFrame::CreateViewForFrame: frame=%p view=%p",
aFrame));
return NS_OK;
}
void
nsHTMLContainerFrame::CheckInvalidateBorder(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState)
{
// XXX This method ought to deal with padding as well
// If this is a style change reflow targeted at this frame, we must repaint
// everything (well, we really just have to repaint the borders but we're
// a bunch of lazybones).
if (aReflowState.reason == eReflowReason_Incremental) {
nsHTMLReflowCommand *command = aReflowState.path->mReflowCommand;
if (command) {
nsReflowType type;
command->GetType(type);
if (type == eReflowType_StyleChanged) {
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 1 (%d, %d, %d, %d)\n",
this, 0, 0, mRect.width, mRect.height);
#endif
// Lots of things could have changed so damage our entire bounds
nsRect damageRect(0, 0, mRect.width, mRect.height);
if (!damageRect.IsEmpty()) {
Invalidate(aPresContext,damageRect);
}
return;
}
}
}
// If we changed size, we must invalidate the parts of us that have changed
// to make the border show up.
if ((aReflowState.reason == eReflowReason_Incremental ||
aReflowState.reason == eReflowReason_Dirty)) {
nsMargin border = aReflowState.mComputedBorderPadding -
aReflowState.mComputedPadding;
// See if our width changed
if ((aDesiredSize.width != mRect.width) && (border.right > 0)) {
nsRect damageRect;
if (aDesiredSize.width < mRect.width) {
// Our new width is smaller, so we need to make sure that
// we paint our border in its new position
damageRect.x = aDesiredSize.width - border.right;
damageRect.width = border.right;
damageRect.y = 0;
damageRect.height = aDesiredSize.height;
} else {
// Our new width is larger, so we need to erase our border in its
// old position
damageRect.x = mRect.width - border.right;
damageRect.width = border.right;
damageRect.y = 0;
damageRect.height = mRect.height;
}
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 2 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
if (!damageRect.IsEmpty()) {
Invalidate(aPresContext, damageRect);
}
}
// See if our height changed
if ((aDesiredSize.height != mRect.height) && (border.bottom > 0)) {
nsRect damageRect;
if (aDesiredSize.height < mRect.height) {
// Our new height is smaller, so we need to make sure that
// we paint our border in its new position
damageRect.x = 0;
damageRect.width = aDesiredSize.width;
damageRect.y = aDesiredSize.height - border.bottom;
damageRect.height = border.bottom;
} else {
// Our new height is larger, so we need to erase our border in its
// old position
damageRect.x = 0;
damageRect.width = mRect.width;
damageRect.y = mRect.height - border.bottom;
damageRect.height = border.bottom;
}
#ifdef NOISY_BLOCK_INVALIDATE
printf("%p invalidate 3 (%d, %d, %d, %d)\n",
this, damageRect.x, damageRect.y, damageRect.width, damageRect.height);
#endif
if (!damageRect.IsEmpty()) {
Invalidate(aPresContext, damageRect);
}
}
}
}
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