gecko-dev/layout/xul/nsLeafBoxFrame.cpp

382 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//
// Eric Vaughan
// Netscape Communications
//
// See documentation in associated header file
//
#include "nsLeafBoxFrame.h"
#include "nsBoxFrame.h"
#include "nsCOMPtr.h"
#include "nsGkAtoms.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsIContent.h"
#include "nsINameSpaceManager.h"
#include "nsBoxLayoutState.h"
#include "nsWidgetsCID.h"
#include "nsViewManager.h"
#include "nsContainerFrame.h"
#include "nsDisplayList.h"
#include <algorithm>
//
// NS_NewLeafBoxFrame
//
// Creates a new Toolbar frame and returns it
//
nsIFrame*
NS_NewLeafBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsLeafBoxFrame(aPresShell, aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsLeafBoxFrame)
nsLeafBoxFrame::nsLeafBoxFrame(nsIPresShell* aShell, nsStyleContext* aContext)
: nsLeafFrame(aContext)
{
}
#ifdef DEBUG_LAYOUT
void
nsLeafBoxFrame::GetBoxName(nsAutoString& aName)
{
GetFrameName(aName);
}
#endif
/**
* Initialize us. This is a good time to get the alignment of the box
*/
void
nsLeafBoxFrame::Init(
nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsLeafFrame::Init(aContent, aParent, aPrevInFlow);
if (GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER) {
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
}
UpdateMouseThrough();
}
nsresult
nsLeafBoxFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
nsresult rv = nsLeafFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
if (aAttribute == nsGkAtoms::mousethrough)
UpdateMouseThrough();
return rv;
}
void nsLeafBoxFrame::UpdateMouseThrough()
{
if (mContent) {
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::never, &nsGkAtoms::always, nullptr};
switch (mContent->FindAttrValueIn(kNameSpaceID_None,
nsGkAtoms::mousethrough,
strings, eCaseMatters)) {
case 0: AddStateBits(NS_FRAME_MOUSE_THROUGH_NEVER); break;
case 1: AddStateBits(NS_FRAME_MOUSE_THROUGH_ALWAYS); break;
case 2: {
RemoveStateBits(NS_FRAME_MOUSE_THROUGH_ALWAYS);
RemoveStateBits(NS_FRAME_MOUSE_THROUGH_NEVER);
break;
}
}
}
}
void
nsLeafBoxFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
// REVIEW: GetFrameForPoint used to not report events for the background
// layer, whereas this code will put an event receiver for this frame in the
// BlockBorderBackground() list. But I don't see any need to preserve
// that anomalous behaviour. The important thing I'm preserving is that
// leaf boxes continue to receive events in the foreground layer.
DisplayBorderBackgroundOutline(aBuilder, aLists);
if (!aBuilder->IsForEventDelivery() || !IsVisibleForPainting(aBuilder))
return;
aLists.Content()->AppendNewToTop(new (aBuilder)
nsDisplayEventReceiver(aBuilder, this));
}
/* virtual */ nscoord
nsLeafBoxFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
nsBoxLayoutState state(PresContext(), aRenderingContext);
nsSize minSize = GetMinSize(state);
// GetMinSize returns border-box width, and we want to return content
// width. Since Reflow uses the reflow state's border and padding, we
// actually just want to subtract what GetMinSize added, which is the
// result of GetBorderAndPadding.
nsMargin bp;
GetBorderAndPadding(bp);
result = minSize.width - bp.LeftRight();
return result;
}
/* virtual */ nscoord
nsLeafBoxFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_PREF_WIDTH(this, result);
nsBoxLayoutState state(PresContext(), aRenderingContext);
nsSize prefSize = GetPrefSize(state);
// GetPrefSize returns border-box width, and we want to return content
// width. Since Reflow uses the reflow state's border and padding, we
// actually just want to subtract what GetPrefSize added, which is the
// result of GetBorderAndPadding.
nsMargin bp;
GetBorderAndPadding(bp);
result = prefSize.width - bp.LeftRight();
return result;
}
nscoord
nsLeafBoxFrame::GetIntrinsicWidth()
{
// No intrinsic width
return 0;
}
nsSize
nsLeafBoxFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap)
{
// Important: NOT calling our direct superclass here!
return nsFrame::ComputeAutoSize(aRenderingContext, aCBSize, aAvailableWidth,
aMargin, aBorder, aPadding, aShrinkWrap);
}
nsresult
nsLeafBoxFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// This is mostly a copy of nsBoxFrame::Reflow().
// We aren't able to share an implementation because of the frame
// class hierarchy. If you make changes here, please keep
// nsBoxFrame::Reflow in sync.
DO_GLOBAL_REFLOW_COUNT("nsLeafBoxFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_ASSERTION(aReflowState.ComputedWidth() >=0 &&
aReflowState.ComputedHeight() >= 0, "Computed Size < 0");
#ifdef DO_NOISY_REFLOW
printf("\n-------------Starting LeafBoxFrame Reflow ----------------------------\n");
printf("%p ** nsLBF::Reflow %d R: ", this, myCounter++);
switch (aReflowState.reason) {
case eReflowReason_Initial:
printf("Ini");break;
case eReflowReason_Incremental:
printf("Inc");break;
case eReflowReason_Resize:
printf("Rsz");break;
case eReflowReason_StyleChange:
printf("Sty");break;
case eReflowReason_Dirty:
printf("Drt ");
break;
default:printf("<unknown>%d", aReflowState.reason);break;
}
printSize("AW", aReflowState.AvailableWidth());
printSize("AH", aReflowState.AvailableHeight());
printSize("CW", aReflowState.ComputedWidth());
printSize("CH", aReflowState.ComputedHeight());
printf(" *\n");
#endif
aStatus = NS_FRAME_COMPLETE;
// create the layout state
nsBoxLayoutState state(aPresContext, aReflowState.rendContext);
nsSize computedSize(aReflowState.ComputedWidth(),aReflowState.ComputedHeight());
nsMargin m;
m = aReflowState.ComputedPhysicalBorderPadding();
//GetBorderAndPadding(m);
// this happens sometimes. So lets handle it gracefully.
if (aReflowState.ComputedHeight() == 0) {
nsSize minSize = GetMinSize(state);
computedSize.height = minSize.height - m.top - m.bottom;
}
nsSize prefSize(0,0);
// if we are told to layout intrinic then get our preferred size.
if (computedSize.width == NS_INTRINSICSIZE || computedSize.height == NS_INTRINSICSIZE) {
prefSize = GetPrefSize(state);
nsSize minSize = GetMinSize(state);
nsSize maxSize = GetMaxSize(state);
prefSize = BoundsCheck(minSize, prefSize, maxSize);
}
// get our desiredSize
if (aReflowState.ComputedWidth() == NS_INTRINSICSIZE) {
computedSize.width = prefSize.width;
} else {
computedSize.width += m.left + m.right;
}
if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) {
computedSize.height = prefSize.height;
} else {
computedSize.height += m.top + m.bottom;
}
// handle reflow state min and max sizes
// XXXbz the width handling here seems to be wrong, since
// mComputedMin/MaxWidth is a content-box size, whole
// computedSize.width is a border-box size...
if (computedSize.width > aReflowState.ComputedMaxWidth())
computedSize.width = aReflowState.ComputedMaxWidth();
if (computedSize.width < aReflowState.ComputedMinWidth())
computedSize.width = aReflowState.ComputedMinWidth();
// Now adjust computedSize.height for our min and max computed
// height. The only problem is that those are content-box sizes,
// while computedSize.height is a border-box size. So subtract off
// m.TopBottom() before adjusting, then readd it.
computedSize.height = std::max(0, computedSize.height - m.TopBottom());
computedSize.height = NS_CSS_MINMAX(computedSize.height,
aReflowState.ComputedMinHeight(),
aReflowState.ComputedMaxHeight());
computedSize.height += m.TopBottom();
nsRect r(mRect.x, mRect.y, computedSize.width, computedSize.height);
SetBounds(state, r);
// layout our children
Layout(state);
// ok our child could have gotten bigger. So lets get its bounds
aDesiredSize.Width() = mRect.width;
aDesiredSize.Height() = mRect.height;
aDesiredSize.SetTopAscent(GetBoxAscent(state));
// the overflow rect is set in SetBounds() above
aDesiredSize.mOverflowAreas = GetOverflowAreas();
#ifdef DO_NOISY_REFLOW
{
printf("%p ** nsLBF(done) W:%d H:%d ", this, aDesiredSize.Width(), aDesiredSize.Height());
if (maxElementWidth) {
printf("MW:%d\n", *maxElementWidth);
} else {
printf("MW:?\n");
}
}
#endif
return NS_OK;
}
#ifdef DEBUG_FRAME_DUMP
nsresult
nsLeafBoxFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("LeafBox"), aResult);
}
#endif
nsIAtom*
nsLeafBoxFrame::GetType() const
{
return nsGkAtoms::leafBoxFrame;
}
nsresult
nsLeafBoxFrame::CharacterDataChanged(CharacterDataChangeInfo* aInfo)
{
MarkIntrinsicWidthsDirty();
return nsLeafFrame::CharacterDataChanged(aInfo);
}
/* virtual */ nsSize
nsLeafBoxFrame::GetPrefSize(nsBoxLayoutState& aState)
{
return nsBox::GetPrefSize(aState);
}
/* virtual */ nsSize
nsLeafBoxFrame::GetMinSize(nsBoxLayoutState& aState)
{
return nsBox::GetMinSize(aState);
}
/* virtual */ nsSize
nsLeafBoxFrame::GetMaxSize(nsBoxLayoutState& aState)
{
return nsBox::GetMaxSize(aState);
}
/* virtual */ nscoord
nsLeafBoxFrame::GetFlex(nsBoxLayoutState& aState)
{
return nsBox::GetFlex(aState);
}
/* virtual */ nscoord
nsLeafBoxFrame::GetBoxAscent(nsBoxLayoutState& aState)
{
return nsBox::GetBoxAscent(aState);
}
/* virtual */ void
nsLeafBoxFrame::MarkIntrinsicWidthsDirty()
{
// Don't call base class method, since everything it does is within an
// IsBoxWrapped check.
}
NS_IMETHODIMP
nsLeafBoxFrame::DoLayout(nsBoxLayoutState& aState)
{
return nsBox::DoLayout(aState);
}