зеркало из https://github.com/mozilla/pjs.git
519 строки
20 KiB
C++
519 строки
20 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* 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 Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
#include "nsCOMPtr.h"
|
|
#include "nsAbsoluteContainingBlock.h"
|
|
#include "nsContainerFrame.h"
|
|
#include "nsHTMLIIDs.h"
|
|
#include "nsIReflowCommand.h"
|
|
#include "nsIStyleContext.h"
|
|
#include "nsIViewManager.h"
|
|
#include "nsLayoutAtoms.h"
|
|
#include "nsIReflowCommand.h"
|
|
#include "nsIPresShell.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsIPresContext.h"
|
|
#include "nsIFrameManager.h"
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::FirstChild(const nsIFrame* aDelegatingFrame,
|
|
nsIAtom* aListName,
|
|
nsIFrame** aFirstChild) const
|
|
{
|
|
NS_PRECONDITION(nsLayoutAtoms::absoluteList == aListName, "unexpected child list name");
|
|
*aFirstChild = mAbsoluteFrames.FirstChild();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::SetInitialChildList(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList)
|
|
{
|
|
NS_PRECONDITION(nsLayoutAtoms::absoluteList == aListName, "unexpected child list name");
|
|
#ifdef NS_DEBUG
|
|
nsFrame::VerifyDirtyBitSet(aChildList);
|
|
#endif
|
|
mAbsoluteFrames.SetFrames(aChildList);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::AppendFrames(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
// Append the frames to our list of absolutely positioned frames
|
|
#ifdef NS_DEBUG
|
|
nsFrame::VerifyDirtyBitSet(aFrameList);
|
|
#endif
|
|
mAbsoluteFrames.AppendFrames(nsnull, aFrameList);
|
|
|
|
// Generate a reflow command to reflow the dirty frames
|
|
nsIReflowCommand* reflowCmd;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, aDelegatingFrame, nsIReflowCommand::ReflowDirty);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
reflowCmd->SetChildListName(nsLayoutAtoms::absoluteList);
|
|
aPresShell.AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::InsertFrames(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
// Insert the new frames
|
|
#ifdef NS_DEBUG
|
|
nsFrame::VerifyDirtyBitSet(aFrameList);
|
|
#endif
|
|
mAbsoluteFrames.InsertFrames(nsnull, aPrevFrame, aFrameList);
|
|
|
|
// Generate a reflow command to reflow the dirty frames
|
|
nsIReflowCommand* reflowCmd;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, aDelegatingFrame, nsIReflowCommand::ReflowDirty);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
reflowCmd->SetChildListName(nsLayoutAtoms::absoluteList);
|
|
aPresShell.AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::RemoveFrame(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
PRBool result = mAbsoluteFrames.DestroyFrame(aPresContext, aOldFrame);
|
|
NS_ASSERTION(result, "didn't find frame to delete");
|
|
// Because positioned frames aren't part of a flow, there's no additional
|
|
// work to do, e.g. reflowing sibling frames. And because positioned frames
|
|
// have a view, we don't need to repaint
|
|
return result ? NS_OK : NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Destructor function for the collapse offset frame property
|
|
static void
|
|
DestroyRectFunc(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame,
|
|
nsIAtom* aPropertyName,
|
|
void* aPropertyValue)
|
|
{
|
|
delete (nsRect*)aPropertyValue;
|
|
}
|
|
|
|
static nsRect*
|
|
GetOverflowAreaProperty(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame,
|
|
PRBool aCreateIfNecessary = PR_FALSE)
|
|
{
|
|
nsCOMPtr<nsIPresShell> presShell;
|
|
aPresContext->GetShell(getter_AddRefs(presShell));
|
|
|
|
if (presShell) {
|
|
nsCOMPtr<nsIFrameManager> frameManager;
|
|
presShell->GetFrameManager(getter_AddRefs(frameManager));
|
|
|
|
if (frameManager) {
|
|
void* value;
|
|
|
|
frameManager->GetFrameProperty(aFrame, nsLayoutAtoms::overflowAreaProperty,
|
|
0, &value);
|
|
if (value) {
|
|
return (nsRect*)value; // the property already exists
|
|
|
|
} else if (aCreateIfNecessary) {
|
|
// The property isn't set yet, so allocate a new rect, set the property,
|
|
// and return the newly allocated rect
|
|
nsRect* overflow = new nsRect(0, 0, 0, 0);
|
|
|
|
frameManager->SetFrameProperty(aFrame, nsLayoutAtoms::overflowAreaProperty,
|
|
overflow, DestroyRectFunc);
|
|
return overflow;
|
|
}
|
|
}
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::Reflow(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
nsRect& aChildBounds)
|
|
{
|
|
// Initialize OUT parameter
|
|
aChildBounds.SetRect(0, 0, 0, 0);
|
|
|
|
// Make a copy of the reflow state. If the reason is eReflowReason_Incremental,
|
|
// then change it to eReflowReason_Resize
|
|
nsHTMLReflowState reflowState(aReflowState);
|
|
if (eReflowReason_Incremental == reflowState.reason) {
|
|
reflowState.reason = eReflowReason_Resize;
|
|
}
|
|
|
|
nsIFrame* kidFrame;
|
|
for (kidFrame = mAbsoluteFrames.FirstChild(); nsnull != kidFrame; kidFrame->GetNextSibling(&kidFrame)) {
|
|
// if the positioned frame has never had a reflow, change the reason to initial
|
|
PRBool initialReflow = PR_FALSE;
|
|
nsFrameState kidState;
|
|
kidFrame->GetFrameState(&kidState);
|
|
if (NS_FRAME_FIRST_REFLOW & kidState) {
|
|
initialReflow = PR_TRUE;
|
|
}
|
|
|
|
// Reflow the frame
|
|
nsReflowStatus kidStatus;
|
|
ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, reflowState, aContainingBlockWidth,
|
|
aContainingBlockHeight, kidFrame, initialReflow, kidStatus);
|
|
|
|
// Add in the child's bounds
|
|
nsRect kidBounds;
|
|
kidFrame->GetRect(kidBounds);
|
|
aChildBounds.UnionRect(aChildBounds, kidBounds);
|
|
|
|
// If the frame has visible overflow, then take it into account, too.
|
|
nsFrameState kidFrameState;
|
|
kidFrame->GetFrameState(&kidFrameState);
|
|
if (kidFrameState & NS_FRAME_OUTSIDE_CHILDREN) {
|
|
// Get the property
|
|
nsRect* overflowArea = ::GetOverflowAreaProperty(aPresContext, kidFrame);
|
|
|
|
if (overflowArea) {
|
|
// The overflow area is in the child's coordinate space, so translate
|
|
// it into the parent's coordinate space
|
|
nsRect rect(*overflowArea);
|
|
|
|
rect.MoveBy(kidBounds.x, kidBounds.y);
|
|
aChildBounds.UnionRect(aChildBounds, rect);
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsAbsoluteContainingBlock::CalculateChildBounds(nsIPresContext* aPresContext,
|
|
nsRect& aChildBounds)
|
|
{
|
|
for (nsIFrame* f = mAbsoluteFrames.FirstChild(); f; f->GetNextSibling(&f)) {
|
|
// Add in the child's bounds
|
|
nsRect bounds;
|
|
f->GetRect(bounds);
|
|
aChildBounds.UnionRect(aChildBounds, bounds);
|
|
|
|
// If the frame has visible overflow, then take it into account, too.
|
|
nsFrameState frameState;
|
|
f->GetFrameState(&frameState);
|
|
if (frameState & NS_FRAME_OUTSIDE_CHILDREN) {
|
|
// Get the property
|
|
nsRect* overflowArea = ::GetOverflowAreaProperty(aPresContext, f);
|
|
|
|
if (overflowArea) {
|
|
// The overflow area is in the child's coordinate space, so translate
|
|
// it into the parent's coordinate space
|
|
nsRect rect(*overflowArea);
|
|
|
|
rect.MoveBy(bounds.x, bounds.y);
|
|
aChildBounds.UnionRect(aChildBounds, rect);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsAbsoluteContainingBlock::IncrementalReflow(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
PRBool& aWasHandled,
|
|
nsRect& aChildBounds)
|
|
{
|
|
// Initialize the OUT paremeters
|
|
aWasHandled = PR_FALSE;
|
|
aChildBounds.SetRect(0, 0, 0, 0);
|
|
|
|
// See if the reflow command is targeted at us
|
|
nsIFrame* targetFrame;
|
|
aReflowState.reflowCommand->GetTarget(targetFrame);
|
|
|
|
if (aReflowState.frame == targetFrame) {
|
|
nsIAtom* listName;
|
|
PRBool isAbsoluteChild;
|
|
|
|
// It's targeted at us. See if it's for the positioned child frames
|
|
aReflowState.reflowCommand->GetChildListName(listName);
|
|
isAbsoluteChild = nsLayoutAtoms::absoluteList == listName;
|
|
NS_IF_RELEASE(listName);
|
|
|
|
if (isAbsoluteChild) {
|
|
nsIReflowCommand::ReflowType type;
|
|
|
|
// Get the type of reflow command
|
|
aReflowState.reflowCommand->GetType(type);
|
|
|
|
// The only type of reflow command we expect is that we have dirty
|
|
// child frames to reflow
|
|
NS_ASSERTION(nsIReflowCommand::ReflowDirty, "unexpected reflow type");
|
|
|
|
// Walk the positioned frames and reflow the dirty frames
|
|
for (nsIFrame* f = mAbsoluteFrames.FirstChild(); f; f->GetNextSibling(&f)) {
|
|
nsFrameState frameState;
|
|
|
|
f->GetFrameState(&frameState);
|
|
if (frameState & NS_FRAME_IS_DIRTY) {
|
|
nsReflowStatus status;
|
|
|
|
// Note: the only reason the frame would be dirty would be if it had
|
|
// just been inserted or appended
|
|
NS_ASSERTION(frameState & NS_FRAME_FIRST_REFLOW, "unexpected frame state");
|
|
ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, aReflowState,
|
|
aContainingBlockWidth, aContainingBlockHeight, f,
|
|
PR_TRUE, status);
|
|
}
|
|
}
|
|
|
|
// Indicate we handled the reflow command
|
|
aWasHandled = PR_TRUE;
|
|
|
|
// Calculate the total child bounds
|
|
CalculateChildBounds(aPresContext, aChildBounds);
|
|
}
|
|
|
|
} else {
|
|
// Peek at the next frame in the reflow path
|
|
nsIFrame* nextFrame;
|
|
aReflowState.reflowCommand->GetNext(nextFrame, PR_FALSE);
|
|
|
|
// See if it's one of our absolutely positioned child frames
|
|
NS_ASSERTION(nsnull != nextFrame, "next frame in reflow command is null");
|
|
if (mAbsoluteFrames.ContainsFrame(nextFrame)) {
|
|
// Remove the next frame from the reflow path
|
|
aReflowState.reflowCommand->GetNext(nextFrame, PR_TRUE);
|
|
|
|
nsReflowStatus kidStatus;
|
|
ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, aReflowState,
|
|
aContainingBlockWidth, aContainingBlockHeight, nextFrame,
|
|
PR_FALSE, kidStatus);
|
|
// We don't need to invalidate anything because the frame should
|
|
// invalidate any area within its frame that needs repainting, and
|
|
// because it has a view if it changes size the view manager will
|
|
// damage the dirty area
|
|
aWasHandled = PR_TRUE;
|
|
|
|
// Calculate the total child bounds
|
|
CalculateChildBounds(aPresContext, aChildBounds);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsAbsoluteContainingBlock::DestroyFrames(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext)
|
|
{
|
|
mAbsoluteFrames.DestroyFrames(aPresContext);
|
|
}
|
|
|
|
// XXX Optimize the case where it's a resize reflow and the absolutely
|
|
// positioned child has the exact same size and position and skip the
|
|
// reflow...
|
|
nsresult
|
|
nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame* aDelegatingFrame,
|
|
nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
nsIFrame* aKidFrame,
|
|
PRBool aInitialReflow,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
nsresult rv;
|
|
nsMargin border;
|
|
|
|
// Get the border values
|
|
if (!aReflowState.mStyleSpacing->GetBorder(border)) {
|
|
NS_NOTYETIMPLEMENTED("percentage border");
|
|
}
|
|
|
|
nsSize availSize(aReflowState.mComputedWidth, NS_UNCONSTRAINEDSIZE);
|
|
nsHTMLReflowMetrics kidDesiredSize(nsnull);
|
|
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
|
|
availSize, aContainingBlockWidth,
|
|
aContainingBlockHeight);
|
|
|
|
// If it's the initial reflow, then override the reflow reason. This is
|
|
// used when frames are inserted incrementally
|
|
if (aInitialReflow) {
|
|
kidReflowState.reason = eReflowReason_Initial;
|
|
}
|
|
|
|
// Send the WillReflow() notification and position the frame
|
|
aKidFrame->WillReflow(aPresContext);
|
|
aKidFrame->MoveTo(aPresContext,
|
|
border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left,
|
|
border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top);
|
|
|
|
// Position its view
|
|
nsIView* kidView;
|
|
aKidFrame->GetView(aPresContext, &kidView);
|
|
nsContainerFrame::PositionFrameView(aPresContext, aKidFrame, kidView);
|
|
|
|
// Do the reflow
|
|
rv = aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowState, aStatus);
|
|
|
|
// Because we don't know the size of a replaced element until after we reflow
|
|
// it 'auto' margins must be computed now, and we need to take into account
|
|
// min-max information
|
|
if (NS_FRAME_IS_REPLACED(kidReflowState.mFrameType)) {
|
|
// Factor in any minimum and maximum size information
|
|
if (kidDesiredSize.width > kidReflowState.mComputedMaxWidth) {
|
|
kidDesiredSize.width = kidReflowState.mComputedMaxWidth;
|
|
} else if (kidDesiredSize.width < kidReflowState.mComputedMinWidth) {
|
|
kidDesiredSize.width = kidReflowState.mComputedMinWidth;
|
|
}
|
|
if (kidDesiredSize.height > kidReflowState.mComputedMaxHeight) {
|
|
kidDesiredSize.height = kidReflowState.mComputedMaxHeight;
|
|
} else if (kidDesiredSize.height < kidReflowState.mComputedMinHeight) {
|
|
kidDesiredSize.height = kidReflowState.mComputedMinHeight;
|
|
}
|
|
|
|
// Get the containing block width/height
|
|
nscoord containingBlockWidth, containingBlockHeight;
|
|
kidReflowState.ComputeContainingBlockRectangle(&aReflowState,
|
|
containingBlockWidth,
|
|
containingBlockHeight);
|
|
|
|
// XXX This code belongs in nsHTMLReflowState...
|
|
if ((NS_AUTOMARGIN == kidReflowState.mComputedMargin.left) ||
|
|
(NS_AUTOMARGIN == kidReflowState.mComputedMargin.right)) {
|
|
// Calculate the amount of space for margins
|
|
nscoord availMarginSpace = containingBlockWidth -
|
|
kidReflowState.mComputedOffsets.left - kidReflowState.mComputedBorderPadding.left -
|
|
kidDesiredSize.width - kidReflowState.mComputedBorderPadding.right -
|
|
kidReflowState.mComputedOffsets.right;
|
|
|
|
if (NS_AUTOMARGIN == kidReflowState.mComputedMargin.left) {
|
|
if (NS_AUTOMARGIN == kidReflowState.mComputedMargin.right) {
|
|
// Both 'margin-left' and 'margin-right' are 'auto', so they get
|
|
// equal values
|
|
kidReflowState.mComputedMargin.left = availMarginSpace / 2;
|
|
kidReflowState.mComputedMargin.right = availMarginSpace -
|
|
kidReflowState.mComputedMargin.left;
|
|
} else {
|
|
// Just 'margin-left' is 'auto'
|
|
kidReflowState.mComputedMargin.left = availMarginSpace -
|
|
kidReflowState.mComputedMargin.right;
|
|
}
|
|
} else {
|
|
// Just 'margin-right' is 'auto'
|
|
kidReflowState.mComputedMargin.right = availMarginSpace -
|
|
kidReflowState.mComputedMargin.left;
|
|
}
|
|
}
|
|
if ((NS_AUTOMARGIN == kidReflowState.mComputedMargin.top) ||
|
|
(NS_AUTOMARGIN == kidReflowState.mComputedMargin.bottom)) {
|
|
// Calculate the amount of space for margins
|
|
nscoord availMarginSpace = containingBlockHeight -
|
|
kidReflowState.mComputedOffsets.top - kidReflowState.mComputedBorderPadding.top -
|
|
kidDesiredSize.height - kidReflowState.mComputedBorderPadding.bottom -
|
|
kidReflowState.mComputedOffsets.bottom;
|
|
|
|
if (NS_AUTOMARGIN == kidReflowState.mComputedMargin.top) {
|
|
if (NS_AUTOMARGIN == kidReflowState.mComputedMargin.bottom) {
|
|
// Both 'margin-top' and 'margin-bottom' are 'auto', so they get
|
|
// equal values
|
|
kidReflowState.mComputedMargin.top = availMarginSpace / 2;
|
|
kidReflowState.mComputedMargin.bottom = availMarginSpace -
|
|
kidReflowState.mComputedMargin.top;
|
|
} else {
|
|
// Just 'margin-top' is 'auto'
|
|
kidReflowState.mComputedMargin.top = availMarginSpace -
|
|
kidReflowState.mComputedMargin.bottom;
|
|
}
|
|
} else {
|
|
// Just 'margin-bottom' is 'auto'
|
|
kidReflowState.mComputedMargin.bottom = availMarginSpace -
|
|
kidReflowState.mComputedMargin.top;
|
|
}
|
|
}
|
|
}
|
|
|
|
// XXX If the child had a fixed height, then make sure it respected it...
|
|
if (NS_AUTOHEIGHT != kidReflowState.mComputedHeight) {
|
|
if (kidDesiredSize.height < kidReflowState.mComputedHeight) {
|
|
kidDesiredSize.height = kidReflowState.mComputedHeight;
|
|
kidDesiredSize.height += kidReflowState.mComputedBorderPadding.top +
|
|
kidReflowState.mComputedBorderPadding.bottom;
|
|
}
|
|
}
|
|
|
|
// Position the child relative to our padding edge
|
|
nsRect rect(border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left,
|
|
border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top,
|
|
kidDesiredSize.width, kidDesiredSize.height);
|
|
aKidFrame->SetRect(aPresContext, rect);
|
|
|
|
// Size and position the view and set its opacity, visibility, content
|
|
// transparency, and clip
|
|
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame, kidView,
|
|
&kidDesiredSize.mOverflowArea);
|
|
aKidFrame->DidReflow(aPresContext, NS_FRAME_REFLOW_FINISHED);
|
|
|
|
// If the frame has visible overflow, then store it as a property on the
|
|
// frame. This allows us to be able to recover it without having to reflow
|
|
// the frame
|
|
nsFrameState kidFrameState;
|
|
aKidFrame->GetFrameState(&kidFrameState);
|
|
if (kidFrameState & NS_FRAME_OUTSIDE_CHILDREN) {
|
|
// Get the property (creating a rect struct if necessary)
|
|
nsRect* overflowArea = ::GetOverflowAreaProperty(aPresContext, aKidFrame, PR_TRUE);
|
|
|
|
if (overflowArea) {
|
|
*overflowArea = kidDesiredSize.mOverflowArea;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|