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gecko-dev/layout/xul/nsBoxFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=80: */
/* 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
//
// How boxes layout
// ----------------
// Boxes layout a bit differently than html. html does a bottom up layout. Where boxes do a top down.
// 1) First thing a box does it goes out and askes each child for its min, max, and preferred sizes.
// 2) It then adds them up to determine its size.
// 3) If the box was asked to layout it self intrinically it will layout its children at their preferred size
// otherwise it will layout the child at the size it was told to. It will squeeze or stretch its children if
// Necessary.
//
// However there is a catch. Some html components like block frames can not determine their preferred size.
// this is their size if they were laid out intrinsically. So the box will flow the child to determine this can
// cache the value.
// Boxes and Incremental Reflow
// ----------------------------
// Boxes layout out top down by adding up their children's min, max, and preferred sizes. Only problem is if a incremental
// reflow occurs. The preferred size of a child deep in the hierarchy could change. And this could change
// any number of syblings around the box. Basically any children in the reflow chain must have their caches cleared
// so when asked for there current size they can relayout themselves.
#include "nsBoxFrame.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "nsBoxLayoutState.h"
#include "mozilla/dom/Touch.h"
#include "mozilla/Move.h"
#include "nsStyleContext.h"
#include "nsPlaceholderFrame.h"
#include "nsPresContext.h"
#include "nsCOMPtr.h"
#include "nsNameSpaceManager.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsHTMLParts.h"
#include "nsViewManager.h"
#include "nsView.h"
#include "nsIPresShell.h"
#include "nsCSSRendering.h"
#include "nsIServiceManager.h"
#include "nsBoxLayout.h"
#include "nsSprocketLayout.h"
#include "nsIScrollableFrame.h"
#include "nsWidgetsCID.h"
#include "nsCSSAnonBoxes.h"
#include "nsContainerFrame.h"
#include "nsIDOMElement.h"
#include "nsITheme.h"
#include "nsTransform2D.h"
#include "mozilla/EventStateManager.h"
#include "nsIDOMEvent.h"
#include "nsDisplayList.h"
#include "mozilla/Preferences.h"
#include "nsThemeConstants.h"
#include "nsLayoutUtils.h"
#include <algorithm>
// Needed for Print Preview
#include "nsIURI.h"
#include "mozilla/TouchEvents.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::gfx;
//define DEBUG_REDRAW
#define DEBUG_SPRING_SIZE 8
#define DEBUG_BORDER_SIZE 2
#define COIL_SIZE 8
//#define TEST_SANITY
#ifdef DEBUG_rods
//#define DO_NOISY_REFLOW
#endif
#ifdef DEBUG_LAYOUT
bool nsBoxFrame::gDebug = false;
nsIFrame* nsBoxFrame::mDebugChild = nullptr;
#endif
nsIFrame*
NS_NewBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot, nsBoxLayout* aLayoutManager)
{
return new (aPresShell) nsBoxFrame(aContext, aIsRoot, aLayoutManager);
}
nsIFrame*
NS_NewBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsBoxFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsBoxFrame)
#ifdef DEBUG
NS_QUERYFRAME_HEAD(nsBoxFrame)
NS_QUERYFRAME_ENTRY(nsBoxFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
#endif
nsBoxFrame::nsBoxFrame(nsStyleContext* aContext,
bool aIsRoot,
nsBoxLayout* aLayoutManager) :
nsContainerFrame(aContext)
{
mState |= NS_STATE_IS_HORIZONTAL;
mState |= NS_STATE_AUTO_STRETCH;
if (aIsRoot)
mState |= NS_STATE_IS_ROOT;
mValign = vAlign_Top;
mHalign = hAlign_Left;
// if no layout manager specified us the static sprocket layout
nsCOMPtr<nsBoxLayout> layout = aLayoutManager;
if (layout == nullptr) {
NS_NewSprocketLayout(PresContext()->PresShell(), layout);
}
SetLayoutManager(layout);
}
nsBoxFrame::~nsBoxFrame()
{
}
void
nsBoxFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList)
{
nsContainerFrame::SetInitialChildList(aListID, aChildList);
// initialize our list of infos.
nsBoxLayoutState state(PresContext());
CheckBoxOrder();
if (mLayoutManager)
mLayoutManager->ChildrenSet(this, state, mFrames.FirstChild());
}
/* virtual */ void
nsBoxFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
nsContainerFrame::DidSetStyleContext(aOldStyleContext);
// The values that CacheAttributes() computes depend on our style,
// so we need to recompute them here...
CacheAttributes();
}
/**
* Initialize us. This is a good time to get the alignment of the box
*/
void
nsBoxFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
if (GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER) {
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
}
MarkIntrinsicISizesDirty();
CacheAttributes();
#ifdef DEBUG_LAYOUT
// if we are root and this
if (mState & NS_STATE_IS_ROOT)
GetDebugPref(GetPresContext());
#endif
UpdateMouseThrough();
// register access key
RegUnregAccessKey(true);
}
void nsBoxFrame::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
nsBoxFrame::CacheAttributes()
{
/*
printf("Caching: ");
DumpBox(stdout);
printf("\n");
*/
mValign = vAlign_Top;
mHalign = hAlign_Left;
bool orient = false;
GetInitialOrientation(orient);
if (orient)
mState |= NS_STATE_IS_HORIZONTAL;
else
mState &= ~NS_STATE_IS_HORIZONTAL;
bool normal = true;
GetInitialDirection(normal);
if (normal)
mState |= NS_STATE_IS_DIRECTION_NORMAL;
else
mState &= ~NS_STATE_IS_DIRECTION_NORMAL;
GetInitialVAlignment(mValign);
GetInitialHAlignment(mHalign);
bool equalSize = false;
GetInitialEqualSize(equalSize);
if (equalSize)
mState |= NS_STATE_EQUAL_SIZE;
else
mState &= ~NS_STATE_EQUAL_SIZE;
bool autostretch = !!(mState & NS_STATE_AUTO_STRETCH);
GetInitialAutoStretch(autostretch);
if (autostretch)
mState |= NS_STATE_AUTO_STRETCH;
else
mState &= ~NS_STATE_AUTO_STRETCH;
#ifdef DEBUG_LAYOUT
bool debug = mState & NS_STATE_SET_TO_DEBUG;
bool debugSet = GetInitialDebug(debug);
if (debugSet) {
mState |= NS_STATE_DEBUG_WAS_SET;
if (debug)
mState |= NS_STATE_SET_TO_DEBUG;
else
mState &= ~NS_STATE_SET_TO_DEBUG;
} else {
mState &= ~NS_STATE_DEBUG_WAS_SET;
}
#endif
}
#ifdef DEBUG_LAYOUT
bool
nsBoxFrame::GetInitialDebug(bool& aDebug)
{
if (!GetContent())
return false;
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::_false, &nsGkAtoms::_true, nullptr};
int32_t index = GetContent()->FindAttrValueIn(kNameSpaceID_None,
nsGkAtoms::debug, strings, eCaseMatters);
if (index >= 0) {
aDebug = index == 1;
return true;
}
return false;
}
#endif
bool
nsBoxFrame::GetInitialHAlignment(nsBoxFrame::Halignment& aHalign)
{
if (!GetContent())
return false;
// XXXdwh Everything inside this if statement is deprecated code.
static nsIContent::AttrValuesArray alignStrings[] =
{&nsGkAtoms::left, &nsGkAtoms::right, nullptr};
static const Halignment alignValues[] = {hAlign_Left, hAlign_Right};
int32_t index = GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::align,
alignStrings, eCaseMatters);
if (index >= 0) {
aHalign = alignValues[index];
return true;
}
// Now that the deprecated stuff is out of the way, we move on to check the appropriate
// attribute. For horizontal boxes, we are checking the PACK attribute. For vertical boxes
// we are checking the ALIGN attribute.
nsIAtom* attrName = IsHorizontal() ? nsGkAtoms::pack : nsGkAtoms::align;
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::_empty, &nsGkAtoms::start, &nsGkAtoms::center, &nsGkAtoms::end, nullptr};
static const Halignment values[] =
{hAlign_Left/*not used*/, hAlign_Left, hAlign_Center, hAlign_Right};
index = GetContent()->FindAttrValueIn(kNameSpaceID_None, attrName,
strings, eCaseMatters);
if (index == nsIContent::ATTR_VALUE_NO_MATCH) {
// The attr was present but had a nonsensical value. Revert to the default.
return false;
}
if (index > 0) {
aHalign = values[index];
return true;
}
// Now that we've checked for the attribute it's time to check CSS. For
// horizontal boxes we're checking PACK. For vertical boxes we are checking
// ALIGN.
const nsStyleXUL* boxInfo = StyleXUL();
if (IsHorizontal()) {
switch (boxInfo->mBoxPack) {
case NS_STYLE_BOX_PACK_START:
aHalign = nsBoxFrame::hAlign_Left;
return true;
case NS_STYLE_BOX_PACK_CENTER:
aHalign = nsBoxFrame::hAlign_Center;
return true;
case NS_STYLE_BOX_PACK_END:
aHalign = nsBoxFrame::hAlign_Right;
return true;
default: // Nonsensical value. Just bail.
return false;
}
}
else {
switch (boxInfo->mBoxAlign) {
case NS_STYLE_BOX_ALIGN_START:
aHalign = nsBoxFrame::hAlign_Left;
return true;
case NS_STYLE_BOX_ALIGN_CENTER:
aHalign = nsBoxFrame::hAlign_Center;
return true;
case NS_STYLE_BOX_ALIGN_END:
aHalign = nsBoxFrame::hAlign_Right;
return true;
default: // Nonsensical value. Just bail.
return false;
}
}
return false;
}
bool
nsBoxFrame::GetInitialVAlignment(nsBoxFrame::Valignment& aValign)
{
if (!GetContent())
return false;
static nsIContent::AttrValuesArray valignStrings[] =
{&nsGkAtoms::top, &nsGkAtoms::baseline, &nsGkAtoms::middle, &nsGkAtoms::bottom, nullptr};
static const Valignment valignValues[] =
{vAlign_Top, vAlign_BaseLine, vAlign_Middle, vAlign_Bottom};
int32_t index = GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::valign,
valignStrings, eCaseMatters);
if (index >= 0) {
aValign = valignValues[index];
return true;
}
// Now that the deprecated stuff is out of the way, we move on to check the appropriate
// attribute. For horizontal boxes, we are checking the ALIGN attribute. For vertical boxes
// we are checking the PACK attribute.
nsIAtom* attrName = IsHorizontal() ? nsGkAtoms::align : nsGkAtoms::pack;
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::_empty, &nsGkAtoms::start, &nsGkAtoms::center,
&nsGkAtoms::baseline, &nsGkAtoms::end, nullptr};
static const Valignment values[] =
{vAlign_Top/*not used*/, vAlign_Top, vAlign_Middle, vAlign_BaseLine, vAlign_Bottom};
index = GetContent()->FindAttrValueIn(kNameSpaceID_None, attrName,
strings, eCaseMatters);
if (index == nsIContent::ATTR_VALUE_NO_MATCH) {
// The attr was present but had a nonsensical value. Revert to the default.
return false;
}
if (index > 0) {
aValign = values[index];
return true;
}
// Now that we've checked for the attribute it's time to check CSS. For
// horizontal boxes we're checking ALIGN. For vertical boxes we are checking
// PACK.
const nsStyleXUL* boxInfo = StyleXUL();
if (IsHorizontal()) {
switch (boxInfo->mBoxAlign) {
case NS_STYLE_BOX_ALIGN_START:
aValign = nsBoxFrame::vAlign_Top;
return true;
case NS_STYLE_BOX_ALIGN_CENTER:
aValign = nsBoxFrame::vAlign_Middle;
return true;
case NS_STYLE_BOX_ALIGN_BASELINE:
aValign = nsBoxFrame::vAlign_BaseLine;
return true;
case NS_STYLE_BOX_ALIGN_END:
aValign = nsBoxFrame::vAlign_Bottom;
return true;
default: // Nonsensical value. Just bail.
return false;
}
}
else {
switch (boxInfo->mBoxPack) {
case NS_STYLE_BOX_PACK_START:
aValign = nsBoxFrame::vAlign_Top;
return true;
case NS_STYLE_BOX_PACK_CENTER:
aValign = nsBoxFrame::vAlign_Middle;
return true;
case NS_STYLE_BOX_PACK_END:
aValign = nsBoxFrame::vAlign_Bottom;
return true;
default: // Nonsensical value. Just bail.
return false;
}
}
return false;
}
void
nsBoxFrame::GetInitialOrientation(bool& aIsHorizontal)
{
// see if we are a vertical or horizontal box.
if (!GetContent())
return;
// Check the style system first.
const nsStyleXUL* boxInfo = StyleXUL();
if (boxInfo->mBoxOrient == NS_STYLE_BOX_ORIENT_HORIZONTAL)
aIsHorizontal = true;
else
aIsHorizontal = false;
// Now see if we have an attribute. The attribute overrides
// the style system value.
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::vertical, &nsGkAtoms::horizontal, nullptr};
int32_t index = GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::orient,
strings, eCaseMatters);
if (index >= 0) {
aIsHorizontal = index == 1;
}
}
void
nsBoxFrame::GetInitialDirection(bool& aIsNormal)
{
if (!GetContent())
return;
if (IsHorizontal()) {
// For horizontal boxes only, we initialize our value based off the CSS 'direction' property.
// This means that BiDI users will end up with horizontally inverted chrome.
aIsNormal = (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR); // If text runs RTL then so do we.
}
else
aIsNormal = true; // Assume a normal direction in the vertical case.
// Now check the style system to see if we should invert aIsNormal.
const nsStyleXUL* boxInfo = StyleXUL();
if (boxInfo->mBoxDirection == NS_STYLE_BOX_DIRECTION_REVERSE)
aIsNormal = !aIsNormal; // Invert our direction.
// Now see if we have an attribute. The attribute overrides
// the style system value.
if (IsHorizontal()) {
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::reverse, &nsGkAtoms::ltr, &nsGkAtoms::rtl, nullptr};
int32_t index = GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::dir,
strings, eCaseMatters);
if (index >= 0) {
bool values[] = {!aIsNormal, true, false};
aIsNormal = values[index];
}
} else if (GetContent()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::dir,
nsGkAtoms::reverse, eCaseMatters)) {
aIsNormal = !aIsNormal;
}
}
/* Returns true if it was set.
*/
bool
nsBoxFrame::GetInitialEqualSize(bool& aEqualSize)
{
// see if we are a vertical or horizontal box.
if (!GetContent())
return false;
if (GetContent()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::equalsize,
nsGkAtoms::always, eCaseMatters)) {
aEqualSize = true;
return true;
}
return false;
}
/* Returns true if it was set.
*/
bool
nsBoxFrame::GetInitialAutoStretch(bool& aStretch)
{
if (!GetContent())
return false;
// Check the align attribute.
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::_empty, &nsGkAtoms::stretch, nullptr};
int32_t index = GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::align,
strings, eCaseMatters);
if (index != nsIContent::ATTR_MISSING && index != 0) {
aStretch = index == 1;
return true;
}
// Check the CSS box-align property.
const nsStyleXUL* boxInfo = StyleXUL();
aStretch = (boxInfo->mBoxAlign == NS_STYLE_BOX_ALIGN_STRETCH);
return true;
}
void
nsBoxFrame::DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus)
{
nsFrameState preserveBits =
mState & (NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN);
nsFrame::DidReflow(aPresContext, aReflowState, aStatus);
mState |= preserveBits;
}
bool
nsBoxFrame::HonorPrintBackgroundSettings()
{
return (!mContent || !mContent->IsInNativeAnonymousSubtree()) &&
nsContainerFrame::HonorPrintBackgroundSettings();
}
#ifdef DO_NOISY_REFLOW
static int myCounter = 0;
static void printSize(char * aDesc, nscoord aSize)
{
printf(" %s: ", aDesc);
if (aSize == NS_UNCONSTRAINEDSIZE) {
printf("UC");
} else {
printf("%d", aSize);
}
}
#endif
/* virtual */ nscoord
nsBoxFrame::GetMinISize(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();
result = std::max(result, 0);
return result;
}
/* virtual */ nscoord
nsBoxFrame::GetPrefISize(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();
result = std::max(result, 0);
return result;
}
void
nsBoxFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// If you make changes to this method, please keep nsLeafBoxFrame::Reflow
// in sync, if the changes are applicable there.
DO_GLOBAL_REFLOW_COUNT("nsBoxFrame");
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 BoxFrame Reflow ----------------------------\n");
printf("%p ** nsBF::Reflow %d ", this, myCounter++);
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,
&aReflowState, aReflowState.mReflowDepth);
WritingMode wm = aReflowState.GetWritingMode();
LogicalSize computedSize(wm, aReflowState.ComputedISize(),
aReflowState.ComputedBSize());
LogicalMargin m = aReflowState.ComputedLogicalBorderPadding();
// GetBorderAndPadding(m);
LogicalSize prefSize(wm);
// if we are told to layout intrinsic then get our preferred size.
NS_ASSERTION(computedSize.ISize(wm) != NS_INTRINSICSIZE,
"computed inline size should always be computed");
if (computedSize.BSize(wm) == NS_INTRINSICSIZE) {
nsSize physicalPrefSize = GetPrefSize(state);
nsSize minSize = GetMinSize(state);
nsSize maxSize = GetMaxSize(state);
// XXXbz isn't GetPrefSize supposed to bounds-check for us?
physicalPrefSize = BoundsCheck(minSize, physicalPrefSize, maxSize);
prefSize = LogicalSize(wm, physicalPrefSize);
}
// get our desiredSize
computedSize.ISize(wm) += m.IStart(wm) + m.IEnd(wm);
if (aReflowState.ComputedBSize() == NS_INTRINSICSIZE) {
computedSize.BSize(wm) = prefSize.BSize(wm);
// prefSize is border-box but min/max constraints are content-box.
nscoord blockDirBorderPadding =
aReflowState.ComputedLogicalBorderPadding().BStartEnd(wm);
nscoord contentBSize = computedSize.BSize(wm) - blockDirBorderPadding;
// Note: contentHeight might be negative, but that's OK because min-height
// is never negative.
computedSize.BSize(wm) = aReflowState.ApplyMinMaxHeight(contentBSize) +
blockDirBorderPadding;
} else {
computedSize.BSize(wm) += m.BStart(wm) + m.BEnd(wm);
}
nsSize physicalSize = computedSize.GetPhysicalSize(wm);
nsRect r(mRect.x, mRect.y, physicalSize.width, physicalSize.height);
SetBounds(state, r);
// layout our children
Layout(state);
// ok our child could have gotten bigger. So lets get its bounds
// get the ascent
LogicalSize boxSize = GetLogicalSize(wm);
nscoord ascent = boxSize.BSize(wm);
// getting the ascent could be a lot of work. Don't get it if
// we are the root. The viewport doesn't care about it.
if (!(mState & NS_STATE_IS_ROOT)) {
ascent = GetBoxAscent(state);
}
aDesiredSize.SetSize(wm, boxSize);
aDesiredSize.SetBlockStartAscent(ascent);
aDesiredSize.mOverflowAreas = GetOverflowAreas();
#ifdef DO_NOISY_REFLOW
{
printf("%p ** nsBF(done) W:%d H:%d ", this, aDesiredSize.Width(), aDesiredSize.Height());
if (maxElementSize) {
printf("MW:%d\n", *maxElementWidth);
} else {
printf("MW:?\n");
}
}
#endif
ReflowAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
nsSize
nsBoxFrame::GetPrefSize(nsBoxLayoutState& aBoxLayoutState)
{
NS_ASSERTION(aBoxLayoutState.GetRenderingContext(),
"must have rendering context");
nsSize size(0,0);
DISPLAY_PREF_SIZE(this, size);
if (!DoesNeedRecalc(mPrefSize)) {
return mPrefSize;
}
#ifdef DEBUG_LAYOUT
PropagateDebug(aBoxLayoutState);
#endif
if (IsCollapsed())
return size;
// if the size was not completely redefined in CSS then ask our children
bool widthSet, heightSet;
if (!nsIFrame::AddCSSPrefSize(this, size, widthSet, heightSet))
{
if (mLayoutManager) {
nsSize layoutSize = mLayoutManager->GetPrefSize(this, aBoxLayoutState);
if (!widthSet)
size.width = layoutSize.width;
if (!heightSet)
size.height = layoutSize.height;
}
else {
size = nsBox::GetPrefSize(aBoxLayoutState);
}
}
nsSize minSize = GetMinSize(aBoxLayoutState);
nsSize maxSize = GetMaxSize(aBoxLayoutState);
mPrefSize = BoundsCheck(minSize, size, maxSize);
return mPrefSize;
}
nscoord
nsBoxFrame::GetBoxAscent(nsBoxLayoutState& aBoxLayoutState)
{
if (!DoesNeedRecalc(mAscent))
return mAscent;
#ifdef DEBUG_LAYOUT
PropagateDebug(aBoxLayoutState);
#endif
if (IsCollapsed())
return 0;
if (mLayoutManager)
mAscent = mLayoutManager->GetAscent(this, aBoxLayoutState);
else
mAscent = nsBox::GetBoxAscent(aBoxLayoutState);
return mAscent;
}
nsSize
nsBoxFrame::GetMinSize(nsBoxLayoutState& aBoxLayoutState)
{
NS_ASSERTION(aBoxLayoutState.GetRenderingContext(),
"must have rendering context");
nsSize size(0,0);
DISPLAY_MIN_SIZE(this, size);
if (!DoesNeedRecalc(mMinSize)) {
return mMinSize;
}
#ifdef DEBUG_LAYOUT
PropagateDebug(aBoxLayoutState);
#endif
if (IsCollapsed())
return size;
// if the size was not completely redefined in CSS then ask our children
bool widthSet, heightSet;
if (!nsIFrame::AddCSSMinSize(aBoxLayoutState, this, size, widthSet, heightSet))
{
if (mLayoutManager) {
nsSize layoutSize = mLayoutManager->GetMinSize(this, aBoxLayoutState);
if (!widthSet)
size.width = layoutSize.width;
if (!heightSet)
size.height = layoutSize.height;
}
else {
size = nsBox::GetMinSize(aBoxLayoutState);
}
}
mMinSize = size;
return size;
}
nsSize
nsBoxFrame::GetMaxSize(nsBoxLayoutState& aBoxLayoutState)
{
NS_ASSERTION(aBoxLayoutState.GetRenderingContext(),
"must have rendering context");
nsSize size(NS_INTRINSICSIZE, NS_INTRINSICSIZE);
DISPLAY_MAX_SIZE(this, size);
if (!DoesNeedRecalc(mMaxSize)) {
return mMaxSize;
}
#ifdef DEBUG_LAYOUT
PropagateDebug(aBoxLayoutState);
#endif
if (IsCollapsed())
return size;
// if the size was not completely redefined in CSS then ask our children
bool widthSet, heightSet;
if (!nsIFrame::AddCSSMaxSize(this, size, widthSet, heightSet))
{
if (mLayoutManager) {
nsSize layoutSize = mLayoutManager->GetMaxSize(this, aBoxLayoutState);
if (!widthSet)
size.width = layoutSize.width;
if (!heightSet)
size.height = layoutSize.height;
}
else {
size = nsBox::GetMaxSize(aBoxLayoutState);
}
}
mMaxSize = size;
return size;
}
nscoord
nsBoxFrame::GetFlex(nsBoxLayoutState& aBoxLayoutState)
{
if (!DoesNeedRecalc(mFlex))
return mFlex;
mFlex = nsBox::GetFlex(aBoxLayoutState);
return mFlex;
}
/**
* If subclassing please subclass this method not layout.
* layout will call this method.
*/
NS_IMETHODIMP
nsBoxFrame::DoLayout(nsBoxLayoutState& aState)
{
uint32_t oldFlags = aState.LayoutFlags();
aState.SetLayoutFlags(0);
nsresult rv = NS_OK;
if (mLayoutManager) {
CoordNeedsRecalc(mAscent);
rv = mLayoutManager->Layout(this, aState);
}
aState.SetLayoutFlags(oldFlags);
if (HasAbsolutelyPositionedChildren()) {
// Set up a |reflowState| to pass into ReflowAbsoluteFrames
WritingMode wm = GetWritingMode();
nsHTMLReflowState reflowState(aState.PresContext(), this,
aState.GetRenderingContext(),
LogicalSize(wm, GetLogicalSize().ISize(wm),
NS_UNCONSTRAINEDSIZE));
// Set up a |desiredSize| to pass into ReflowAbsoluteFrames
nsHTMLReflowMetrics desiredSize(reflowState);
desiredSize.Width() = mRect.width;
desiredSize.Height() = mRect.height;
// get the ascent (cribbed from ::Reflow)
nscoord ascent = mRect.height;
// getting the ascent could be a lot of work. Don't get it if
// we are the root. The viewport doesn't care about it.
if (!(mState & NS_STATE_IS_ROOT)) {
ascent = GetBoxAscent(aState);
}
desiredSize.SetBlockStartAscent(ascent);
desiredSize.mOverflowAreas = GetOverflowAreas();
AddStateBits(NS_FRAME_IN_REFLOW);
// Set up a |reflowStatus| to pass into ReflowAbsoluteFrames
// (just a dummy value; hopefully that's OK)
nsReflowStatus reflowStatus = NS_FRAME_COMPLETE;
ReflowAbsoluteFrames(aState.PresContext(), desiredSize,
reflowState, reflowStatus);
RemoveStateBits(NS_FRAME_IN_REFLOW);
}
return rv;
}
void
nsBoxFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
// unregister access key
RegUnregAccessKey(false);
// clean up the container box's layout manager and child boxes
SetLayoutManager(nullptr);
nsContainerFrame::DestroyFrom(aDestructRoot);
}
#ifdef DEBUG_LAYOUT
nsresult
nsBoxFrame::SetDebug(nsBoxLayoutState& aState, bool aDebug)
{
// see if our state matches the given debug state
bool debugSet = mState & NS_STATE_CURRENTLY_IN_DEBUG;
bool debugChanged = (!aDebug && debugSet) || (aDebug && !debugSet);
// if it doesn't then tell each child below us the new debug state
if (debugChanged)
{
if (aDebug) {
mState |= NS_STATE_CURRENTLY_IN_DEBUG;
} else {
mState &= ~NS_STATE_CURRENTLY_IN_DEBUG;
}
SetDebugOnChildList(aState, mFirstChild, aDebug);
MarkIntrinsicISizesDirty();
}
return NS_OK;
}
#endif
/* virtual */ void
nsBoxFrame::MarkIntrinsicISizesDirty()
{
SizeNeedsRecalc(mPrefSize);
SizeNeedsRecalc(mMinSize);
SizeNeedsRecalc(mMaxSize);
CoordNeedsRecalc(mFlex);
CoordNeedsRecalc(mAscent);
if (mLayoutManager) {
nsBoxLayoutState state(PresContext());
mLayoutManager->IntrinsicISizesDirty(this, state);
}
// Don't call base class method, since everything it does is within an
// IsBoxWrapped check.
}
void
nsBoxFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame)
{
NS_PRECONDITION(aListID == kPrincipalList, "We don't support out-of-flow kids");
nsPresContext* presContext = PresContext();
nsBoxLayoutState state(presContext);
// remove the child frame
mFrames.RemoveFrame(aOldFrame);
// notify the layout manager
if (mLayoutManager)
mLayoutManager->ChildrenRemoved(this, state, aOldFrame);
// destroy the child frame
aOldFrame->Destroy();
// mark us dirty and generate a reflow command
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
}
void
nsBoxFrame::InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
"inserting after sibling frame with different parent");
NS_ASSERTION(!aPrevFrame || mFrames.ContainsFrame(aPrevFrame),
"inserting after sibling frame not in our child list");
NS_PRECONDITION(aListID == kPrincipalList, "We don't support out-of-flow kids");
nsBoxLayoutState state(PresContext());
// insert the child frames
const nsFrameList::Slice& newFrames =
mFrames.InsertFrames(this, aPrevFrame, aFrameList);
// notify the layout manager
if (mLayoutManager)
mLayoutManager->ChildrenInserted(this, state, aPrevFrame, newFrames);
// Make sure to check box order _after_ notifying the layout
// manager; otherwise the slice we give the layout manager will
// just be bogus. If the layout manager cares about the order, we
// just lose.
CheckBoxOrder();
#ifdef DEBUG_LAYOUT
// if we are in debug make sure our children are in debug as well.
if (mState & NS_STATE_CURRENTLY_IN_DEBUG)
SetDebugOnChildList(state, mFrames.FirstChild(), true);
#endif
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
}
void
nsBoxFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList)
{
NS_PRECONDITION(aListID == kPrincipalList, "We don't support out-of-flow kids");
nsBoxLayoutState state(PresContext());
// append the new frames
const nsFrameList::Slice& newFrames = mFrames.AppendFrames(this, aFrameList);
// notify the layout manager
if (mLayoutManager)
mLayoutManager->ChildrenAppended(this, state, newFrames);
// Make sure to check box order _after_ notifying the layout
// manager; otherwise the slice we give the layout manager will
// just be bogus. If the layout manager cares about the order, we
// just lose.
CheckBoxOrder();
#ifdef DEBUG_LAYOUT
// if we are in debug make sure our children are in debug as well.
if (mState & NS_STATE_CURRENTLY_IN_DEBUG)
SetDebugOnChildList(state, mFrames.FirstChild(), true);
#endif
// XXXbz why is this NS_FRAME_FIRST_REFLOW check here?
if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
}
}
/* virtual */ nsContainerFrame*
nsBoxFrame::GetContentInsertionFrame()
{
if (GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK)
return GetFirstPrincipalChild()->GetContentInsertionFrame();
return nsContainerFrame::GetContentInsertionFrame();
}
nsresult
nsBoxFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
nsresult rv = nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
// Ignore 'width', 'height', 'screenX', 'screenY' and 'sizemode' on a
// <window>.
nsIAtom *tag = mContent->Tag();
if ((tag == nsGkAtoms::window ||
tag == nsGkAtoms::page ||
tag == nsGkAtoms::dialog ||
tag == nsGkAtoms::wizard) &&
(nsGkAtoms::width == aAttribute ||
nsGkAtoms::height == aAttribute ||
nsGkAtoms::screenX == aAttribute ||
nsGkAtoms::screenY == aAttribute ||
nsGkAtoms::sizemode == aAttribute)) {
return rv;
}
if (aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::height ||
aAttribute == nsGkAtoms::align ||
aAttribute == nsGkAtoms::valign ||
aAttribute == nsGkAtoms::left ||
aAttribute == nsGkAtoms::top ||
aAttribute == nsGkAtoms::right ||
aAttribute == nsGkAtoms::bottom ||
aAttribute == nsGkAtoms::start ||
aAttribute == nsGkAtoms::end ||
aAttribute == nsGkAtoms::minwidth ||
aAttribute == nsGkAtoms::maxwidth ||
aAttribute == nsGkAtoms::minheight ||
aAttribute == nsGkAtoms::maxheight ||
aAttribute == nsGkAtoms::flex ||
aAttribute == nsGkAtoms::orient ||
aAttribute == nsGkAtoms::pack ||
aAttribute == nsGkAtoms::dir ||
aAttribute == nsGkAtoms::mousethrough ||
aAttribute == nsGkAtoms::equalsize) {
if (aAttribute == nsGkAtoms::align ||
aAttribute == nsGkAtoms::valign ||
aAttribute == nsGkAtoms::orient ||
aAttribute == nsGkAtoms::pack ||
#ifdef DEBUG_LAYOUT
aAttribute == nsGkAtoms::debug ||
#endif
aAttribute == nsGkAtoms::dir) {
mValign = nsBoxFrame::vAlign_Top;
mHalign = nsBoxFrame::hAlign_Left;
bool orient = true;
GetInitialOrientation(orient);
if (orient)
mState |= NS_STATE_IS_HORIZONTAL;
else
mState &= ~NS_STATE_IS_HORIZONTAL;
bool normal = true;
GetInitialDirection(normal);
if (normal)
mState |= NS_STATE_IS_DIRECTION_NORMAL;
else
mState &= ~NS_STATE_IS_DIRECTION_NORMAL;
GetInitialVAlignment(mValign);
GetInitialHAlignment(mHalign);
bool equalSize = false;
GetInitialEqualSize(equalSize);
if (equalSize)
mState |= NS_STATE_EQUAL_SIZE;
else
mState &= ~NS_STATE_EQUAL_SIZE;
#ifdef DEBUG_LAYOUT
bool debug = mState & NS_STATE_SET_TO_DEBUG;
bool debugSet = GetInitialDebug(debug);
if (debugSet) {
mState |= NS_STATE_DEBUG_WAS_SET;
if (debug)
mState |= NS_STATE_SET_TO_DEBUG;
else
mState &= ~NS_STATE_SET_TO_DEBUG;
} else {
mState &= ~NS_STATE_DEBUG_WAS_SET;
}
#endif
bool autostretch = !!(mState & NS_STATE_AUTO_STRETCH);
GetInitialAutoStretch(autostretch);
if (autostretch)
mState |= NS_STATE_AUTO_STRETCH;
else
mState &= ~NS_STATE_AUTO_STRETCH;
}
else if (aAttribute == nsGkAtoms::left ||
aAttribute == nsGkAtoms::top ||
aAttribute == nsGkAtoms::right ||
aAttribute == nsGkAtoms::bottom ||
aAttribute == nsGkAtoms::start ||
aAttribute == nsGkAtoms::end) {
mState &= ~NS_STATE_STACK_NOT_POSITIONED;
}
else if (aAttribute == nsGkAtoms::mousethrough) {
UpdateMouseThrough();
}
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
}
else if (aAttribute == nsGkAtoms::ordinal) {
nsBoxLayoutState state(PresContext());
nsIFrame* parent = GetParentBox(this);
// If our parent is not a box, there's not much we can do... but in that
// case our ordinal doesn't matter anyway, so that's ok.
// Also don't bother with popup frames since they are kept on the
// kPopupList and RelayoutChildAtOrdinal() only handles
// principal children.
if (parent && !(GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
StyleDisplay()->mDisplay != NS_STYLE_DISPLAY_POPUP) {
parent->RelayoutChildAtOrdinal(state, this);
// XXXldb Should this instead be a tree change on the child or parent?
PresContext()->PresShell()->
FrameNeedsReflow(parent, nsIPresShell::eStyleChange,
NS_FRAME_IS_DIRTY);
}
}
// If the accesskey changed, register for the new value
// The old value has been unregistered in nsXULElement::SetAttr
else if (aAttribute == nsGkAtoms::accesskey) {
RegUnregAccessKey(true);
}
else if (aAttribute == nsGkAtoms::rows &&
tag == nsGkAtoms::tree) {
// Reflow ourselves and all our children if "rows" changes, since
// nsTreeBodyFrame's layout reads this from its parent (this frame).
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
}
return rv;
}
#ifdef DEBUG_LAYOUT
void
nsBoxFrame::GetDebugPref(nsPresContext* aPresContext)
{
gDebug = Preferences::GetBool("xul.debug.box");
}
class nsDisplayXULDebug : public nsDisplayItem {
public:
nsDisplayXULDebug(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) :
nsDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayXULDebug);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayXULDebug() {
MOZ_COUNT_DTOR(nsDisplayXULDebug);
}
#endif
virtual void HitTest(nsDisplayListBuilder* aBuilder, nsRect aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
nsPoint rectCenter(aRect.x + aRect.width / 2, aRect.y + aRect.height / 2);
static_cast<nsBoxFrame*>(mFrame)->
DisplayDebugInfoFor(this, rectCenter - ToReferenceFrame());
aOutFrames->AppendElement(this);
}
virtual void Paint(nsDisplayListBuilder* aBuilder
nsRenderingContext* aCtx);
NS_DISPLAY_DECL_NAME("XULDebug", TYPE_XUL_DEBUG)
};
void
nsDisplayXULDebug::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
static_cast<nsBoxFrame*>(mFrame)->
PaintXULDebugOverlay(*aCtx->GetDrawTarget(), ToReferenceFrame());
}
static void
PaintXULDebugBackground(nsIFrame* aFrame, nsRenderingContext* aCtx,
const nsRect& aDirtyRect, nsPoint aPt)
{
static_cast<nsBoxFrame*>(aFrame)->PaintXULDebugBackground(*aCtx, aPt);
}
#endif
void
nsBoxFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
bool forceLayer = false;
uint32_t flags = 0;
mozilla::layers::FrameMetrics::ViewID scrollTargetId =
mozilla::layers::FrameMetrics::NULL_SCROLL_ID;
if (GetContent()->IsXUL()) {
// forcelayer is only supported on XUL elements with box layout
if (GetContent()->HasAttr(kNameSpaceID_None, nsGkAtoms::layer)) {
forceLayer = true;
} else {
nsIFrame* parent = GetParentBox(this);
if (parent && parent->GetType() == nsGkAtoms::sliderFrame) {
aBuilder->GetScrollbarInfo(&scrollTargetId, &flags);
forceLayer = (scrollTargetId != layers::FrameMetrics::NULL_SCROLL_ID);
nsLayoutUtils::SetScrollbarThumbLayerization(this, forceLayer);
}
}
// Check for frames that are marked as a part of the region used
// in calculating glass margins on Windows.
const nsStyleDisplay* styles = StyleDisplay();
if (styles && styles->mAppearance == NS_THEME_WIN_EXCLUDE_GLASS) {
aBuilder->AddWindowExcludeGlassRegion(
nsRect(aBuilder->ToReferenceFrame(this), GetSize()));
}
}
nsDisplayListCollection tempLists;
const nsDisplayListSet& destination = forceLayer ? tempLists : aLists;
DisplayBorderBackgroundOutline(aBuilder, destination);
#ifdef DEBUG_LAYOUT
if (mState & NS_STATE_CURRENTLY_IN_DEBUG) {
destination.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayGeneric(aBuilder, this, PaintXULDebugBackground,
"XULDebugBackground"));
destination.Outlines()->AppendNewToTop(new (aBuilder)
nsDisplayXULDebug(aBuilder, this));
}
#endif
BuildDisplayListForChildren(aBuilder, aDirtyRect, destination);
// see if we have to draw a selection frame around this container
DisplaySelectionOverlay(aBuilder, destination.Content());
if (forceLayer) {
// This is a bit of a hack. Collect up all descendant display items
// and merge them into a single Content() list. This can cause us
// to violate CSS stacking order, but forceLayer is a magic
// XUL-only extension anyway.
nsDisplayList masterList;
masterList.AppendToTop(tempLists.BorderBackground());
masterList.AppendToTop(tempLists.BlockBorderBackgrounds());
masterList.AppendToTop(tempLists.Floats());
masterList.AppendToTop(tempLists.Content());
masterList.AppendToTop(tempLists.PositionedDescendants());
masterList.AppendToTop(tempLists.Outlines());
// Wrap the list to make it its own layer
aLists.Content()->AppendNewToTop(new (aBuilder)
nsDisplayOwnLayer(aBuilder, this, &masterList, flags, scrollTargetId));
}
}
void
nsBoxFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsIFrame* kid = mFrames.FirstChild();
// Put each child's background onto the BlockBorderBackgrounds list
// to emulate the existing two-layer XUL painting scheme.
nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
// The children should be in the right order
while (kid) {
BuildDisplayListForChild(aBuilder, kid, aDirtyRect, set);
kid = kid->GetNextSibling();
}
}
// REVIEW: PaintChildren did a few things none of which are a big deal
// anymore:
// * Paint some debugging rects for this frame.
// This is done by nsDisplayXULDebugBackground, which goes in the
// BorderBackground() layer so it isn't clipped by OVERFLOW_CLIP.
// * Apply OVERFLOW_CLIP to the children.
// This is now in nsFrame::BuildDisplayListForStackingContext/Child.
// * Actually paint the children.
// Moved to BuildDisplayList.
// * Paint per-kid debug information.
// This is done by nsDisplayXULDebug, which is in the Outlines()
// layer so it goes on top. This means it is not clipped by OVERFLOW_CLIP,
// whereas it did used to respect OVERFLOW_CLIP, but too bad.
#ifdef DEBUG_LAYOUT
void
nsBoxFrame::PaintXULDebugBackground(nsRenderingContext& aRenderingContext,
nsPoint aPt)
{
nsMargin border;
GetBorder(border);
nsMargin debugBorder;
nsMargin debugMargin;
nsMargin debugPadding;
bool isHorizontal = IsHorizontal();
GetDebugBorder(debugBorder);
PixelMarginToTwips(GetPresContext(), debugBorder);
GetDebugMargin(debugMargin);
PixelMarginToTwips(GetPresContext(), debugMargin);
GetDebugPadding(debugPadding);
PixelMarginToTwips(GetPresContext(), debugPadding);
nsRect inner(mRect);
inner.MoveTo(aPt);
inner.Deflate(debugMargin);
inner.Deflate(border);
//nsRect borderRect(inner);
int32_t appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel();
ColorPattern color(ToDeviceColor(isHorizontal ? Color(0.f, 0.f, 1.f, 1.f) :
Color(1.f, 0.f, 0.f, 1.f)));
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
//left
nsRect r(inner);
r.width = debugBorder.left;
drawTarget->FillRect(NSRectToRect(r, appUnitsPerDevPixel), color);
// top
r = inner;
r.height = debugBorder.top;
drawTarget->FillRect(NSRectToRect(r, appUnitsPerDevPixel), color);
//right
r = inner;
r.x = r.x + r.width - debugBorder.right;
r.width = debugBorder.right;
drawTarget->FillRect(NSRectToRect(r, appUnitsPerDevPixel), color);
//bottom
r = inner;
r.y = r.y + r.height - debugBorder.bottom;
r.height = debugBorder.bottom;
drawTarget->FillRect(NSRectToRect(r, appUnitsPerDevPixel), color);
// if we have dirty children or we are dirty
// place a green border around us.
if (NS_SUBTREE_DIRTY(this)) {
nsRect dirty(inner);
ColorPattern green(ToDeviceColor(Color(0.f, 1.f, 0.f, 1.f)));
drawTarget->StrokeRect(NSRectToRect(dirty, appUnitsPerDevPixel), green);
}
}
void
nsBoxFrame::PaintXULDebugOverlay(DrawTarget& aDrawTarget, nsPoint aPt)
{
nsMargin border;
GetBorder(border);
nsMargin debugMargin;
GetDebugMargin(debugMargin);
PixelMarginToTwips(GetPresContext(), debugMargin);
nsRect inner(mRect);
inner.MoveTo(aPt);
inner.Deflate(debugMargin);
inner.Deflate(border);
nscoord onePixel = GetPresContext()->IntScaledPixelsToTwips(1);
kid = nsBox::GetChildBox(this);
while (nullptr != kid) {
bool isHorizontal = IsHorizontal();
nscoord x, y, borderSize, spacerSize;
nsRect cr(kid->mRect);
nsMargin margin;
kid->GetMargin(margin);
cr.Inflate(margin);
if (isHorizontal)
{
cr.y = inner.y;
x = cr.x;
y = cr.y + onePixel;
spacerSize = debugBorder.top - onePixel*4;
} else {
cr.x = inner.x;
x = cr.y;
y = cr.x + onePixel;
spacerSize = debugBorder.left - onePixel*4;
}
nsBoxLayoutState state(GetPresContext());
nscoord flex = kid->GetFlex(state);
if (!kid->IsCollapsed()) {
if (isHorizontal)
borderSize = cr.width;
else
borderSize = cr.height;
DrawSpacer(GetPresContext(), aDrawTarget, isHorizontal, flex, x, y, borderSize, spacerSize);
}
kid = GetNextBox(kid);
}
}
#endif
#ifdef DEBUG_LAYOUT
void
nsBoxFrame::GetBoxName(nsAutoString& aName)
{
GetFrameName(aName);
}
#endif
#ifdef DEBUG_FRAME_DUMP
nsresult
nsBoxFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("Box"), aResult);
}
#endif
nsIAtom*
nsBoxFrame::GetType() const
{
return nsGkAtoms::boxFrame;
}
#ifdef DEBUG_LAYOUT
nsresult
nsBoxFrame::GetDebug(bool& aDebug)
{
aDebug = (mState & NS_STATE_CURRENTLY_IN_DEBUG);
return NS_OK;
}
#endif
// REVIEW: nsBoxFrame::GetFrameForPoint is a problem because of 'mousethrough'
// attribute support. Here's how it works:
// * For each child frame F, we determine the target frame T(F) by recursively
// invoking GetFrameForPoint on the child
// * Let F' be the last child frame such that T(F') doesn't have mousethrough.
// If F' exists, return T(F')
// * Otherwise let F'' be the first child frame such that T(F'') is non-null.
// If F'' exists, return T(F'')
// * Otherwise return this frame, if this frame contains the point
// * Otherwise return null
// It's not clear how this should work for more complex z-ordering situations.
// The basic principle seems to be that if a frame F has a descendant
// 'mousethrough' frame that includes the target position, then F
// will not receive events (unless it overrides GetFrameForPoint).
// A 'mousethrough' frame will only receive an event if, after applying that rule,
// all eligible frames are 'mousethrough'; the bottom-most inner-most 'mousethrough'
// frame is then chosen (the first eligible frame reached in a
// traversal of the frame tree --- pre/post is irrelevant since ancestors
// of the mousethrough frames can't be eligible).
// IMHO this is very bogus and adds a great deal of complexity for something
// that is very rarely used. So I'm redefining 'mousethrough' to the following:
// a frame with mousethrough is transparent to mouse events. This is compatible
// with the way 'mousethrough' is used in Seamonkey's navigator.xul and
// Firefox's browser.xul. The only other place it's used is in the 'expander'
// XBL binding, which in our tree is only used by Thunderbird SMIME Advanced
// Preferences, and I can't figure out what that does, so I'll have to test it.
// If it's broken I'll probably just change the binding to use it more sensibly.
// This new behaviour is implemented in nsDisplayList::HitTest.
// REVIEW: This debug-box stuff is annoying. I'm just going to put debug boxes
// in the outline layer and avoid GetDebugBoxAt.
// REVIEW: GetCursor had debug-only event dumping code. I have replaced it
// with instrumentation in nsDisplayXULDebug.
#ifdef DEBUG_LAYOUT
void
nsBoxFrame::DrawLine(DrawTarget& aDrawTarget, bool aHorizontal, nscoord x1, nscoord y1, nscoord x2, nscoord y2)
{
nsPoint p1(x1, y1);
nsPoint p2(x2, y2);
if (!aHorizontal) {
Swap(p1.x, p1.y);
Swap(p2.x, p2.y);
}
ColorPattern white(ToDeviceColor(Color(1.f, 1.f, 1.f, 1.f)));
StrokeLineWithSnapping(p1, p2, PresContext()->AppUnitsPerDevPixel(),
aDrawTarget, color);
}
void
nsBoxFrame::FillRect(DrawTarget& aDrawTarget, bool aHorizontal, nscoord x, nscoord y, nscoord width, nscoord height)
{
Rect rect = NSRectToSnappedRect(aHorizontal ? nsRect(x, y, width, height) :
nsRect(y, x, height, width),
PresContext()->AppUnitsPerDevPixel(),
aDrawTarget);
ColorPattern white(ToDeviceColor(Color(1.f, 1.f, 1.f, 1.f)));
aDrawTarget.FillRect(rect, white);
}
void
nsBoxFrame::DrawSpacer(nsPresContext* aPresContext, DrawTarget& aDrawTarget,
bool aHorizontal, int32_t flex, nscoord x, nscoord y,
nscoord size, nscoord spacerSize)
{
nscoord onePixel = aPresContext->IntScaledPixelsToTwips(1);
// if we do draw the coils
int distance = 0;
int center = 0;
int offset = 0;
int coilSize = COIL_SIZE*onePixel;
int halfSpacer = spacerSize/2;
distance = size;
center = y + halfSpacer;
offset = x;
int coils = distance/coilSize;
int halfCoilSize = coilSize/2;
if (flex == 0) {
DrawLine(aDrawTarget, aHorizontal, x,y + spacerSize/2, x + size, y + spacerSize/2);
} else {
for (int i=0; i < coils; i++)
{
DrawLine(aDrawTarget, aHorizontal, offset, center+halfSpacer, offset+halfCoilSize, center-halfSpacer);
DrawLine(aDrawTarget, aHorizontal, offset+halfCoilSize, center-halfSpacer, offset+coilSize, center+halfSpacer);
offset += coilSize;
}
}
FillRect(aDrawTarget, aHorizontal, x + size - spacerSize/2, y, spacerSize/2, spacerSize);
FillRect(aDrawTarget, aHorizontal, x, y, spacerSize/2, spacerSize);
}
void
nsBoxFrame::GetDebugBorder(nsMargin& aInset)
{
aInset.SizeTo(2,2,2,2);
if (IsHorizontal())
aInset.top = 10;
else
aInset.left = 10;
}
void
nsBoxFrame::GetDebugMargin(nsMargin& aInset)
{
aInset.SizeTo(2,2,2,2);
}
void
nsBoxFrame::GetDebugPadding(nsMargin& aPadding)
{
aPadding.SizeTo(2,2,2,2);
}
void
nsBoxFrame::PixelMarginToTwips(nsPresContext* aPresContext, nsMargin& aMarginPixels)
{
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
aMarginPixels.left *= onePixel;
aMarginPixels.right *= onePixel;
aMarginPixels.top *= onePixel;
aMarginPixels.bottom *= onePixel;
}
void
nsBoxFrame::GetValue(nsPresContext* aPresContext, const nsSize& a, const nsSize& b, char* ch)
{
float p2t = aPresContext->ScaledPixelsToTwips();
char width[100];
char height[100];
if (a.width == NS_INTRINSICSIZE)
sprintf(width,"%s","INF");
else
sprintf(width,"%d", nscoord(a.width/*/p2t*/));
if (a.height == NS_INTRINSICSIZE)
sprintf(height,"%s","INF");
else
sprintf(height,"%d", nscoord(a.height/*/p2t*/));
sprintf(ch, "(%s%s, %s%s)", width, (b.width != NS_INTRINSICSIZE ? "[SET]" : ""),
height, (b.height != NS_INTRINSICSIZE ? "[SET]" : ""));
}
void
nsBoxFrame::GetValue(nsPresContext* aPresContext, int32_t a, int32_t b, char* ch)
{
if (a == NS_INTRINSICSIZE)
sprintf(ch, "%d[SET]", b);
else
sprintf(ch, "%d", a);
}
nsresult
nsBoxFrame::DisplayDebugInfoFor(nsIFrame* aBox,
nsPoint& aPoint)
{
nsBoxLayoutState state(GetPresContext());
nscoord x = aPoint.x;
nscoord y = aPoint.y;
// get the area inside our border but not our debug margins.
nsRect insideBorder(aBox->mRect);
insideBorder.MoveTo(0,0):
nsMargin border(0,0,0,0);
aBox->GetBorderAndPadding(border);
insideBorder.Deflate(border);
bool isHorizontal = IsHorizontal();
if (!insideBorder.Contains(nsPoint(x,y)))
return NS_ERROR_FAILURE;
//printf("%%%%%% inside box %%%%%%%\n");
int count = 0;
nsIFrame* child = nsBox::GetChildBox(aBox);
nsMargin m;
nsMargin m2;
GetDebugBorder(m);
PixelMarginToTwips(aPresContext, m);
GetDebugMargin(m2);
PixelMarginToTwips(aPresContext, m2);
m += m2;
if ((isHorizontal && y < insideBorder.y + m.top) ||
(!isHorizontal && x < insideBorder.x + m.left)) {
//printf("**** inside debug border *******\n");
while (child)
{
const nsRect& r = child->mRect;
// if we are not in the child. But in the spacer above the child.
if ((isHorizontal && x >= r.x && x < r.x + r.width) ||
(!isHorizontal && y >= r.y && y < r.y + r.height)) {
aCursor = NS_STYLE_CURSOR_POINTER;
// found it but we already showed it.
if (mDebugChild == child)
return NS_OK;
if (aBox->GetContent()) {
printf("---------------\n");
DumpBox(stdout);
printf("\n");
}
if (child->GetContent()) {
printf("child #%d: ", count);
child->DumpBox(stdout);
printf("\n");
}
mDebugChild = child;
nsSize prefSizeCSS(NS_INTRINSICSIZE, NS_INTRINSICSIZE);
nsSize minSizeCSS (NS_INTRINSICSIZE, NS_INTRINSICSIZE);
nsSize maxSizeCSS (NS_INTRINSICSIZE, NS_INTRINSICSIZE);
nscoord flexCSS = NS_INTRINSICSIZE;
bool widthSet, heightSet;
nsIFrame::AddCSSPrefSize(child, prefSizeCSS, widthSet, heightSet);
nsIFrame::AddCSSMinSize (state, child, minSizeCSS, widthSet, heightSet);
nsIFrame::AddCSSMaxSize (child, maxSizeCSS, widthSet, heightSet);
nsIFrame::AddCSSFlex (state, child, flexCSS);
nsSize prefSize = child->GetPrefSize(state);
nsSize minSize = child->GetMinSize(state);
nsSize maxSize = child->GetMaxSize(state);
nscoord flexSize = child->GetFlex(state);
nscoord ascentSize = child->GetBoxAscent(state);
char min[100];
char pref[100];
char max[100];
char calc[100];
char flex[100];
char ascent[100];
nsSize actualSize;
GetFrameSizeWithMargin(child, actualSize);
nsSize actualSizeCSS (NS_INTRINSICSIZE, NS_INTRINSICSIZE);
GetValue(aPresContext, minSize, minSizeCSS, min);
GetValue(aPresContext, prefSize, prefSizeCSS, pref);
GetValue(aPresContext, maxSize, maxSizeCSS, max);
GetValue(aPresContext, actualSize, actualSizeCSS, calc);
GetValue(aPresContext, flexSize, flexCSS, flex);
GetValue(aPresContext, ascentSize, NS_INTRINSICSIZE, ascent);
printf("min%s, pref%s, max%s, actual%s, flex=%s, ascent=%s\n\n",
min,
pref,
max,
calc,
flex,
ascent
);
return NS_OK;
}
child = GetNextBox(child);
count++;
}
} else {
}
mDebugChild = nullptr;
return NS_OK;
}
void
nsBoxFrame::SetDebugOnChildList(nsBoxLayoutState& aState, nsIFrame* aChild, bool aDebug)
{
nsIFrame* child = nsBox::GetChildBox(this);
while (child)
{
child->SetDebug(aState, aDebug);
child = GetNextBox(child);
}
}
nsresult
nsBoxFrame::GetFrameSizeWithMargin(nsIFrame* aBox, nsSize& aSize)
{
nsRect rect(aBox->GetRect());
nsMargin margin(0,0,0,0);
aBox->GetMargin(margin);
rect.Inflate(margin);
aSize.width = rect.width;
aSize.height = rect.height;
return NS_OK;
}
#endif
// If you make changes to this function, check its counterparts
// in nsTextBoxFrame and nsXULLabelFrame
void
nsBoxFrame::RegUnregAccessKey(bool aDoReg)
{
MOZ_ASSERT(mContent);
// find out what type of element this is
nsIAtom *atom = mContent->Tag();
// only support accesskeys for the following elements
if (atom != nsGkAtoms::button &&
atom != nsGkAtoms::toolbarbutton &&
atom != nsGkAtoms::checkbox &&
atom != nsGkAtoms::textbox &&
atom != nsGkAtoms::tab &&
atom != nsGkAtoms::radio) {
return;
}
nsAutoString accessKey;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey);
if (accessKey.IsEmpty())
return;
// With a valid PresContext we can get the ESM
// and register the access key
EventStateManager* esm = PresContext()->EventStateManager();
uint32_t key = accessKey.First();
if (aDoReg)
esm->RegisterAccessKey(mContent, key);
else
esm->UnregisterAccessKey(mContent, key);
}
bool
nsBoxFrame::SupportsOrdinalsInChildren()
{
return true;
}
// Helper less-than-or-equal function, used in CheckBoxOrder() as a
// template-parameter for the sorting functions.
bool
IsBoxOrdinalLEQ(nsIFrame* aFrame1,
nsIFrame* aFrame2)
{
// If we've got a placeholder frame, use its out-of-flow frame's ordinal val.
nsIFrame* aRealFrame1 = nsPlaceholderFrame::GetRealFrameFor(aFrame1);
nsIFrame* aRealFrame2 = nsPlaceholderFrame::GetRealFrameFor(aFrame2);
return aRealFrame1->GetOrdinal() <= aRealFrame2->GetOrdinal();
}
void
nsBoxFrame::CheckBoxOrder()
{
if (SupportsOrdinalsInChildren() &&
!nsIFrame::IsFrameListSorted<IsBoxOrdinalLEQ>(mFrames)) {
nsIFrame::SortFrameList<IsBoxOrdinalLEQ>(mFrames);
}
}
nsresult
nsBoxFrame::LayoutChildAt(nsBoxLayoutState& aState, nsIFrame* aBox, const nsRect& aRect)
{
// get the current rect
nsRect oldRect(aBox->GetRect());
aBox->SetBounds(aState, aRect);
bool layout = NS_SUBTREE_DIRTY(aBox);
if (layout || (oldRect.width != aRect.width || oldRect.height != aRect.height)) {
return aBox->Layout(aState);
}
return NS_OK;
}
nsresult
nsBoxFrame::RelayoutChildAtOrdinal(nsBoxLayoutState& aState, nsIFrame* aChild)
{
if (!SupportsOrdinalsInChildren())
return NS_OK;
uint32_t ord = aChild->GetOrdinal();
nsIFrame* child = mFrames.FirstChild();
nsIFrame* newPrevSib = nullptr;
while (child) {
if (ord < child->GetOrdinal()) {
break;
}
if (child != aChild) {
newPrevSib = child;
}
child = GetNextBox(child);
}
if (aChild->GetPrevSibling() == newPrevSib) {
// This box is not moving.
return NS_OK;
}
// Take |aChild| out of its old position in the child list.
mFrames.RemoveFrame(aChild);
// Insert it after |newPrevSib| or at the start if it's null.
mFrames.InsertFrame(nullptr, newPrevSib, aChild);
return NS_OK;
}
/**
* This wrapper class lets us redirect mouse hits from descendant frames
* of a menu to the menu itself, if they didn't specify 'allowevents'.
*
* The wrapper simply turns a hit on a descendant element
* into a hit on the menu itself, unless there is an element between the target
* and the menu with the "allowevents" attribute.
*
* This is used by nsMenuFrame and nsTreeColFrame.
*
* Note that turning a hit on a descendant element into nullptr, so events
* could fall through to the menu background, might be an appealing simplification
* but it would mean slightly strange behaviour in some cases, because grabber
* wrappers can be created for many individual lists and items, so the exact
* fallthrough behaviour would be complex. E.g. an element with "allowevents"
* on top of the Content() list could receive the event even if it was covered
* by a PositionedDescenants() element without "allowevents". It is best to
* never convert a non-null hit into null.
*/
// REVIEW: This is roughly of what nsMenuFrame::GetFrameForPoint used to do.
// I've made 'allowevents' affect child elements because that seems the only
// reasonable thing to do.
class nsDisplayXULEventRedirector : public nsDisplayWrapList {
public:
nsDisplayXULEventRedirector(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame, nsDisplayItem* aItem,
nsIFrame* aTargetFrame)
: nsDisplayWrapList(aBuilder, aFrame, aItem), mTargetFrame(aTargetFrame) {}
nsDisplayXULEventRedirector(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame, nsDisplayList* aList,
nsIFrame* aTargetFrame)
: nsDisplayWrapList(aBuilder, aFrame, aList), mTargetFrame(aTargetFrame) {}
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState,
nsTArray<nsIFrame*> *aOutFrames) MOZ_OVERRIDE;
virtual bool ShouldFlattenAway(nsDisplayListBuilder* aBuilder) MOZ_OVERRIDE {
return false;
}
NS_DISPLAY_DECL_NAME("XULEventRedirector", TYPE_XUL_EVENT_REDIRECTOR)
private:
nsIFrame* mTargetFrame;
};
void nsDisplayXULEventRedirector::HitTest(nsDisplayListBuilder* aBuilder,
const nsRect& aRect, HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
nsTArray<nsIFrame*> outFrames;
mList.HitTest(aBuilder, aRect, aState, &outFrames);
bool topMostAdded = false;
uint32_t localLength = outFrames.Length();
for (uint32_t i = 0; i < localLength; i++) {
for (nsIContent* content = outFrames.ElementAt(i)->GetContent();
content && content != mTargetFrame->GetContent();
content = content->GetParent()) {
if (content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::allowevents,
nsGkAtoms::_true, eCaseMatters)) {
// Events are allowed on 'frame', so let it go.
aOutFrames->AppendElement(outFrames.ElementAt(i));
topMostAdded = true;
}
}
// If there was no hit on the topmost frame or its ancestors,
// add the target frame itself as the first candidate (see bug 562554).
if (!topMostAdded) {
topMostAdded = true;
aOutFrames->AppendElement(mTargetFrame);
}
}
}
class nsXULEventRedirectorWrapper : public nsDisplayWrapper
{
public:
explicit nsXULEventRedirectorWrapper(nsIFrame* aTargetFrame)
: mTargetFrame(aTargetFrame) {}
virtual nsDisplayItem* WrapList(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame,
nsDisplayList* aList) MOZ_OVERRIDE {
return new (aBuilder)
nsDisplayXULEventRedirector(aBuilder, aFrame, aList, mTargetFrame);
}
virtual nsDisplayItem* WrapItem(nsDisplayListBuilder* aBuilder,
nsDisplayItem* aItem) MOZ_OVERRIDE {
return new (aBuilder)
nsDisplayXULEventRedirector(aBuilder, aItem->Frame(), aItem,
mTargetFrame);
}
private:
nsIFrame* mTargetFrame;
};
void
nsBoxFrame::WrapListsInRedirector(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aIn,
const nsDisplayListSet& aOut)
{
nsXULEventRedirectorWrapper wrapper(this);
wrapper.WrapLists(aBuilder, this, aIn, aOut);
}
bool
nsBoxFrame::GetEventPoint(WidgetGUIEvent* aEvent, nsPoint &aPoint) {
LayoutDeviceIntPoint refPoint;
bool res = GetEventPoint(aEvent, refPoint);
aPoint = nsLayoutUtils::GetEventCoordinatesRelativeTo(
aEvent, refPoint, this);
return res;
}
bool
nsBoxFrame::GetEventPoint(WidgetGUIEvent* aEvent, LayoutDeviceIntPoint& aPoint) {
NS_ENSURE_TRUE(aEvent, false);
WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent();
if (touchEvent) {
// return false if there is more than one touch on the page, or if
// we can't find a touch point
if (touchEvent->touches.Length() != 1) {
return false;
}
dom::Touch* touch = touchEvent->touches.SafeElementAt(0);
if (!touch) {
return false;
}
aPoint = touch->mRefPoint;
} else {
aPoint = aEvent->refPoint;
}
return true;
}
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