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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
commit2aa4a82499d4becd2284cdb482213d541b8804dd (patch)
treeb80bf8bf13c3766139fbacc530efd0dd9d54394c /layout/xul/nsBox.cpp
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--layout/xul/nsBox.cpp650
1 files changed, 650 insertions, 0 deletions
diff --git a/layout/xul/nsBox.cpp b/layout/xul/nsBox.cpp
new file mode 100644
index 0000000000..e8710d4358
--- /dev/null
+++ b/layout/xul/nsBox.cpp
@@ -0,0 +1,650 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 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/. */
+
+#include "mozilla/Attributes.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIFrame.h"
+
+#include "nsBoxLayoutState.h"
+#include "nsBoxFrame.h"
+#include "nsDOMAttributeMap.h"
+#include "nsPresContext.h"
+#include "nsCOMPtr.h"
+#include "nsIContent.h"
+#include "nsContainerFrame.h"
+#include "nsNameSpaceManager.h"
+#include "nsGkAtoms.h"
+#include "nsITheme.h"
+#include "nsBoxLayout.h"
+#include "nsLayoutUtils.h"
+#include "FrameLayerBuilder.h"
+#include "mozilla/dom/Attr.h"
+#include "mozilla/dom/Element.h"
+#include <algorithm>
+
+using namespace mozilla;
+
+nsresult nsIFrame::BeginXULLayout(nsBoxLayoutState& aState) {
+ // mark ourselves as dirty so no child under us
+ // can post an incremental layout.
+ // XXXldb Is this still needed?
+ AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
+
+ if (HasAnyStateBits(NS_FRAME_IS_DIRTY)) {
+ // If the parent is dirty, all the children are dirty (ReflowInput
+ // does this too).
+ nsIFrame* box;
+ for (box = GetChildXULBox(this); box; box = GetNextXULBox(box))
+ box->MarkSubtreeDirty();
+ }
+
+ // Another copy-over from ReflowInput.
+ // Since we are in reflow, we don't need to store these properties anymore.
+ RemoveProperty(UsedBorderProperty());
+ RemoveProperty(UsedPaddingProperty());
+ RemoveProperty(UsedMarginProperty());
+
+ return NS_OK;
+}
+
+nsresult nsIFrame::EndXULLayout(nsBoxLayoutState& aState) {
+ return SyncXULLayout(aState);
+}
+
+nsresult nsIFrame::GetXULClientRect(nsRect& aClientRect) {
+ aClientRect = mRect;
+ aClientRect.MoveTo(0, 0);
+
+ nsMargin borderPadding;
+ GetXULBorderAndPadding(borderPadding);
+
+ aClientRect.Deflate(borderPadding);
+
+ if (aClientRect.width < 0) aClientRect.width = 0;
+
+ if (aClientRect.height < 0) aClientRect.height = 0;
+
+ return NS_OK;
+}
+
+void nsIFrame::SetXULBounds(nsBoxLayoutState& aState, const nsRect& aRect,
+ bool aRemoveOverflowAreas) {
+ nsRect rect(mRect);
+
+ ReflowChildFlags flags = GetXULLayoutFlags() | aState.LayoutFlags();
+
+ if ((flags & ReflowChildFlags::NoMoveFrame) ==
+ ReflowChildFlags::NoMoveFrame) {
+ SetSize(aRect.Size());
+ } else {
+ SetRect(aRect);
+ }
+
+ // Nuke the overflow area. The caller is responsible for restoring
+ // it if necessary.
+ if (aRemoveOverflowAreas) {
+ // remove the previously stored overflow area
+ ClearOverflowRects();
+ }
+
+ if (!(flags & ReflowChildFlags::NoMoveView)) {
+ nsContainerFrame::PositionFrameView(this);
+ if ((rect.x != aRect.x) || (rect.y != aRect.y))
+ nsContainerFrame::PositionChildViews(this);
+ }
+}
+
+nsresult nsIFrame::GetXULBorderAndPadding(nsMargin& aBorderAndPadding) {
+ aBorderAndPadding.SizeTo(0, 0, 0, 0);
+ nsresult rv = GetXULBorder(aBorderAndPadding);
+ if (NS_FAILED(rv)) return rv;
+
+ nsMargin padding;
+ rv = GetXULPadding(padding);
+ if (NS_FAILED(rv)) return rv;
+
+ aBorderAndPadding += padding;
+
+ return rv;
+}
+
+nsresult nsIFrame::GetXULBorder(nsMargin& aBorder) {
+ aBorder.SizeTo(0, 0, 0, 0);
+
+ StyleAppearance appearance = StyleDisplay()->EffectiveAppearance();
+ if (appearance != StyleAppearance::None) {
+ // Go to the theme for the border.
+ nsPresContext* pc = PresContext();
+ nsITheme* theme = pc->Theme();
+ if (theme->ThemeSupportsWidget(pc, this, appearance)) {
+ LayoutDeviceIntMargin margin =
+ theme->GetWidgetBorder(pc->DeviceContext(), this, appearance);
+ aBorder =
+ LayoutDevicePixel::ToAppUnits(margin, pc->AppUnitsPerDevPixel());
+ return NS_OK;
+ }
+ }
+
+ aBorder = StyleBorder()->GetComputedBorder();
+
+ return NS_OK;
+}
+
+nsresult nsIFrame::GetXULPadding(nsMargin& aBorderAndPadding) {
+ StyleAppearance appearance = StyleDisplay()->EffectiveAppearance();
+ if (appearance != StyleAppearance::None) {
+ // Go to the theme for the padding.
+ nsPresContext* pc = PresContext();
+ nsITheme* theme = pc->Theme();
+ if (theme->ThemeSupportsWidget(pc, this, appearance)) {
+ LayoutDeviceIntMargin padding;
+ bool useThemePadding = theme->GetWidgetPadding(pc->DeviceContext(), this,
+ appearance, &padding);
+ if (useThemePadding) {
+ aBorderAndPadding =
+ LayoutDevicePixel::ToAppUnits(padding, pc->AppUnitsPerDevPixel());
+ return NS_OK;
+ }
+ }
+ }
+
+ aBorderAndPadding.SizeTo(0, 0, 0, 0);
+ StylePadding()->GetPadding(aBorderAndPadding);
+
+ return NS_OK;
+}
+
+nsresult nsIFrame::GetXULMargin(nsMargin& aMargin) {
+ aMargin.SizeTo(0, 0, 0, 0);
+ StyleMargin()->GetMargin(aMargin);
+
+ return NS_OK;
+}
+
+void nsIFrame::XULSizeNeedsRecalc(nsSize& aSize) {
+ aSize.width = -1;
+ aSize.height = -1;
+}
+
+void nsIFrame::XULCoordNeedsRecalc(nscoord& aCoord) { aCoord = -1; }
+
+bool nsIFrame::XULNeedsRecalc(const nsSize& aSize) {
+ return (aSize.width == -1 || aSize.height == -1);
+}
+
+bool nsIFrame::XULNeedsRecalc(nscoord aCoord) { return (aCoord == -1); }
+
+nsSize nsIFrame::GetUncachedXULPrefSize(nsBoxLayoutState& aBoxLayoutState) {
+ NS_ASSERTION(aBoxLayoutState.GetRenderingContext(),
+ "must have rendering context");
+
+ nsSize pref(0, 0);
+ DISPLAY_PREF_SIZE(this, pref);
+
+ if (IsXULCollapsed()) {
+ return pref;
+ }
+
+ AddXULBorderAndPadding(pref);
+ bool widthSet, heightSet;
+ nsIFrame::AddXULPrefSize(this, pref, widthSet, heightSet);
+
+ nsSize minSize = GetXULMinSize(aBoxLayoutState);
+ nsSize maxSize = GetXULMaxSize(aBoxLayoutState);
+ return XULBoundsCheck(minSize, pref, maxSize);
+}
+
+nsSize nsIFrame::GetUncachedXULMinSize(nsBoxLayoutState& aBoxLayoutState) {
+ NS_ASSERTION(aBoxLayoutState.GetRenderingContext(),
+ "must have rendering context");
+
+ nsSize min(0, 0);
+ DISPLAY_MIN_SIZE(this, min);
+
+ if (IsXULCollapsed()) {
+ return min;
+ }
+
+ AddXULBorderAndPadding(min);
+ bool widthSet, heightSet;
+ nsIFrame::AddXULMinSize(this, min, widthSet, heightSet);
+ return min;
+}
+
+nsSize nsIFrame::GetXULMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) {
+ return nsSize(0, 0);
+}
+
+nsSize nsIFrame::GetUncachedXULMaxSize(nsBoxLayoutState& aBoxLayoutState) {
+ NS_ASSERTION(aBoxLayoutState.GetRenderingContext(),
+ "must have rendering context");
+
+ nsSize maxSize(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
+ DISPLAY_MAX_SIZE(this, maxSize);
+
+ if (IsXULCollapsed()) {
+ return maxSize;
+ }
+
+ AddXULBorderAndPadding(maxSize);
+ bool widthSet, heightSet;
+ nsIFrame::AddXULMaxSize(this, maxSize, widthSet, heightSet);
+ return maxSize;
+}
+
+bool nsIFrame::IsXULCollapsed() {
+ return StyleVisibility()->mVisible == StyleVisibility::Collapse;
+}
+
+nsresult nsIFrame::XULLayout(nsBoxLayoutState& aState) {
+ NS_ASSERTION(aState.GetRenderingContext(), "must have rendering context");
+
+ nsIFrame* box = static_cast<nsIFrame*>(this);
+ DISPLAY_LAYOUT(box);
+
+ box->BeginXULLayout(aState);
+
+ box->DoXULLayout(aState);
+
+ box->EndXULLayout(aState);
+
+ return NS_OK;
+}
+
+bool nsIFrame::DoesClipChildrenInBothAxes() {
+ const nsStyleDisplay* display = StyleDisplay();
+ return display->mOverflowX == StyleOverflow::Clip &&
+ display->mOverflowY == StyleOverflow::Clip;
+}
+
+nsresult nsIFrame::SyncXULLayout(nsBoxLayoutState& aBoxLayoutState) {
+ /*
+ if (IsXULCollapsed()) {
+ CollapseChild(aBoxLayoutState, this, true);
+ return NS_OK;
+ }
+ */
+
+ if (HasAnyStateBits(NS_FRAME_IS_DIRTY)) {
+ XULRedraw(aBoxLayoutState);
+ }
+
+ RemoveStateBits(NS_FRAME_HAS_DIRTY_CHILDREN | NS_FRAME_IS_DIRTY |
+ NS_FRAME_FIRST_REFLOW | NS_FRAME_IN_REFLOW);
+
+ nsPresContext* presContext = aBoxLayoutState.PresContext();
+
+ ReflowChildFlags flags = GetXULLayoutFlags() | aBoxLayoutState.LayoutFlags();
+
+ nsRect inkOverflow;
+
+ if (XULComputesOwnOverflowArea()) {
+ inkOverflow = InkOverflowRect();
+ } else {
+ nsRect rect(nsPoint(0, 0), GetSize());
+ OverflowAreas overflowAreas(rect, rect);
+ if (!DoesClipChildrenInBothAxes() && !IsXULCollapsed()) {
+ // See if our child frames caused us to overflow after being laid
+ // out. If so, store the overflow area. This normally can't happen
+ // in XUL, but it can happen with the CSS 'outline' property and
+ // possibly with other exotic stuff (e.g. relatively positioned
+ // frames in HTML inside XUL).
+ nsLayoutUtils::UnionChildOverflow(this, overflowAreas);
+ }
+
+ FinishAndStoreOverflow(overflowAreas, GetSize());
+ inkOverflow = overflowAreas.InkOverflow();
+ }
+
+ nsView* view = GetView();
+ if (view) {
+ // Make sure the frame's view is properly sized and positioned and has
+ // things like opacity correct
+ nsContainerFrame::SyncFrameViewAfterReflow(presContext, this, view,
+ inkOverflow, flags);
+ }
+
+ return NS_OK;
+}
+
+nsresult nsIFrame::XULRedraw(nsBoxLayoutState& aState) {
+ if (aState.PaintingDisabled()) return NS_OK;
+
+ // nsStackLayout, at least, expects us to repaint descendants even
+ // if a damage rect is provided
+ InvalidateFrameSubtree();
+
+ return NS_OK;
+}
+
+bool nsIFrame::AddXULPrefSize(nsIFrame* aBox, nsSize& aSize, bool& aWidthSet,
+ bool& aHeightSet) {
+ aWidthSet = false;
+ aHeightSet = false;
+
+ // add in the css min, max, pref
+ const nsStylePosition* position = aBox->StylePosition();
+
+ // see if the width or height was specifically set
+ // XXX Handle eStyleUnit_Enumerated?
+ // (Handling the eStyleUnit_Enumerated types requires
+ // GetXULPrefSize/GetXULMinSize methods that don't consider
+ // (min-/max-/)(width/height) properties.)
+ const auto& width = position->mWidth;
+ if (width.ConvertsToLength()) {
+ aSize.width = std::max(0, width.ToLength());
+ aWidthSet = true;
+ }
+
+ const auto& height = position->mHeight;
+ if (height.ConvertsToLength()) {
+ aSize.height = std::max(0, height.ToLength());
+ aHeightSet = true;
+ }
+
+ nsIContent* content = aBox->GetContent();
+ // ignore 'height' and 'width' attributes if the actual element is not XUL
+ // For example, we might be magic XUL frames whose primary content is an HTML
+ // <select>
+ if (content && content->IsXULElement()) {
+ nsAutoString value;
+ nsresult error;
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::width, value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+
+ aSize.width = nsPresContext::CSSPixelsToAppUnits(value.ToInteger(&error));
+ aWidthSet = true;
+ }
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::height, value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+
+ aSize.height =
+ nsPresContext::CSSPixelsToAppUnits(value.ToInteger(&error));
+ aHeightSet = true;
+ }
+ }
+
+ return (aWidthSet && aHeightSet);
+}
+
+// This returns the scrollbar width we want to use when either native
+// theme is disabled, or the native theme claims that it doesn't support
+// scrollbar.
+static nscoord GetScrollbarWidthNoTheme(nsIFrame* aBox) {
+ ComputedStyle* scrollbarStyle = nsLayoutUtils::StyleForScrollbar(aBox);
+ switch (scrollbarStyle->StyleUIReset()->mScrollbarWidth) {
+ default:
+ case StyleScrollbarWidth::Auto:
+ return 12 * AppUnitsPerCSSPixel();
+ case StyleScrollbarWidth::Thin:
+ return 6 * AppUnitsPerCSSPixel();
+ case StyleScrollbarWidth::None:
+ return 0;
+ }
+}
+
+bool nsIFrame::AddXULMinSize(nsIFrame* aBox, nsSize& aSize, bool& aWidthSet,
+ bool& aHeightSet) {
+ aWidthSet = false;
+ aHeightSet = false;
+
+ bool canOverride = true;
+
+ nsPresContext* pc = aBox->PresContext();
+
+ // See if a native theme wants to supply a minimum size.
+ const nsStyleDisplay* display = aBox->StyleDisplay();
+ if (display->HasAppearance()) {
+ nsITheme* theme = pc->Theme();
+ StyleAppearance appearance = display->EffectiveAppearance();
+ if (theme->ThemeSupportsWidget(pc, aBox, appearance)) {
+ LayoutDeviceIntSize size;
+ theme->GetMinimumWidgetSize(pc, aBox, appearance, &size, &canOverride);
+ if (size.width) {
+ aSize.width = pc->DevPixelsToAppUnits(size.width);
+ aWidthSet = true;
+ }
+ if (size.height) {
+ aSize.height = pc->DevPixelsToAppUnits(size.height);
+ aHeightSet = true;
+ }
+ } else {
+ switch (appearance) {
+ case StyleAppearance::ScrollbarVertical:
+ aSize.width = GetScrollbarWidthNoTheme(aBox);
+ aWidthSet = true;
+ break;
+ case StyleAppearance::ScrollbarHorizontal:
+ aSize.height = GetScrollbarWidthNoTheme(aBox);
+ aHeightSet = true;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ // add in the css min, max, pref
+ const nsStylePosition* position = aBox->StylePosition();
+ const auto& minWidth = position->mMinWidth;
+ if (minWidth.ConvertsToLength()) {
+ nscoord min = minWidth.ToLength();
+ if (!aWidthSet || (min > aSize.width && canOverride)) {
+ aSize.width = min;
+ aWidthSet = true;
+ }
+ } else if (minWidth.ConvertsToPercentage()) {
+ NS_ASSERTION(minWidth.ToPercentage() == 0.0f,
+ "Non-zero percentage values not currently supported");
+ aSize.width = 0;
+ aWidthSet = true; // FIXME: should we really do this for
+ // nonzero values?
+ }
+ // XXX Handle ExtremumLength?
+ // (Handling them requires GetXULPrefSize/GetXULMinSize methods that don't
+ // consider (min-/max-/)(width/height) properties.
+ // calc() with percentage is treated like '0' (unset)
+
+ const auto& minHeight = position->mMinHeight;
+ if (minHeight.ConvertsToLength()) {
+ nscoord min = minHeight.ToLength();
+ if (!aHeightSet || (min > aSize.height && canOverride)) {
+ aSize.height = min;
+ aHeightSet = true;
+ }
+ } else if (minHeight.ConvertsToPercentage()) {
+ NS_ASSERTION(position->mMinHeight.ToPercentage() == 0.0f,
+ "Non-zero percentage values not currently supported");
+ aSize.height = 0;
+ aHeightSet = true; // FIXME: should we really do this for
+ // nonzero values?
+ }
+ // calc() with percentage is treated like '0' (unset)
+
+ nsIContent* content = aBox->GetContent();
+ if (content && content->IsXULElement()) {
+ nsAutoString value;
+ nsresult error;
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::minwidth,
+ value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+
+ nscoord val = nsPresContext::CSSPixelsToAppUnits(value.ToInteger(&error));
+ if (val > aSize.width) aSize.width = val;
+ aWidthSet = true;
+ }
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::minheight,
+ value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+
+ nscoord val = nsPresContext::CSSPixelsToAppUnits(value.ToInteger(&error));
+ if (val > aSize.height) aSize.height = val;
+
+ aHeightSet = true;
+ }
+ }
+
+ return (aWidthSet && aHeightSet);
+}
+
+bool nsIFrame::AddXULMaxSize(nsIFrame* aBox, nsSize& aSize, bool& aWidthSet,
+ bool& aHeightSet) {
+ aWidthSet = false;
+ aHeightSet = false;
+
+ // add in the css min, max, pref
+ const nsStylePosition* position = aBox->StylePosition();
+
+ // and max
+ // see if the width or height was specifically set
+ // XXX Handle eStyleUnit_Enumerated?
+ // (Handling the eStyleUnit_Enumerated types requires
+ // GetXULPrefSize/GetXULMinSize methods that don't consider
+ // (min-/max-/)(width/height) properties.)
+ const auto& maxWidth = position->mMaxWidth;
+ if (maxWidth.ConvertsToLength()) {
+ aSize.width = maxWidth.ToLength();
+ aWidthSet = true;
+ }
+ // percentages and calc() with percentages are treated like 'none'
+
+ const auto& maxHeight = position->mMaxHeight;
+ if (maxHeight.ConvertsToLength()) {
+ aSize.height = maxHeight.ToLength();
+ aHeightSet = true;
+ }
+ // percentages and calc() with percentages are treated like 'none'
+
+ nsIContent* content = aBox->GetContent();
+ if (content && content->IsXULElement()) {
+ nsAutoString value;
+ nsresult error;
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::maxwidth,
+ value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+
+ nscoord val = nsPresContext::CSSPixelsToAppUnits(value.ToInteger(&error));
+ aSize.width = val;
+ aWidthSet = true;
+ }
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::maxheight,
+ value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+
+ nscoord val = nsPresContext::CSSPixelsToAppUnits(value.ToInteger(&error));
+ aSize.height = val;
+
+ aHeightSet = true;
+ }
+ }
+
+ return (aWidthSet || aHeightSet);
+}
+
+bool nsIFrame::AddXULFlex(nsIFrame* aBox, nscoord& aFlex) {
+ bool flexSet = false;
+
+ // get the flexibility
+ aFlex = aBox->StyleXUL()->mBoxFlex;
+
+ // attribute value overrides CSS
+ nsIContent* content = aBox->GetContent();
+ if (content && content->IsXULElement()) {
+ nsresult error;
+ nsAutoString value;
+
+ content->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::flex, value);
+ if (!value.IsEmpty()) {
+ value.Trim("%");
+ aFlex = value.ToInteger(&error);
+ flexSet = true;
+ }
+ }
+
+ if (aFlex < 0) aFlex = 0;
+ if (aFlex >= nscoord_MAX) aFlex = nscoord_MAX - 1;
+
+ return flexSet || aFlex > 0;
+}
+
+void nsIFrame::AddXULBorderAndPadding(nsSize& aSize) {
+ AddXULBorderAndPadding(this, aSize);
+}
+
+void nsIFrame::AddXULBorderAndPadding(nsIFrame* aBox, nsSize& aSize) {
+ nsMargin borderPadding(0, 0, 0, 0);
+ aBox->GetXULBorderAndPadding(borderPadding);
+ AddXULMargin(aSize, borderPadding);
+}
+
+void nsIFrame::AddXULMargin(nsIFrame* aChild, nsSize& aSize) {
+ nsMargin margin(0, 0, 0, 0);
+ aChild->GetXULMargin(margin);
+ AddXULMargin(aSize, margin);
+}
+
+void nsIFrame::AddXULMargin(nsSize& aSize, const nsMargin& aMargin) {
+ if (aSize.width != NS_UNCONSTRAINEDSIZE)
+ aSize.width += aMargin.left + aMargin.right;
+
+ if (aSize.height != NS_UNCONSTRAINEDSIZE)
+ aSize.height += aMargin.top + aMargin.bottom;
+}
+
+nscoord nsIFrame::XULBoundsCheck(nscoord aMin, nscoord aPref, nscoord aMax) {
+ if (aPref > aMax) aPref = aMax;
+
+ if (aPref < aMin) aPref = aMin;
+
+ return aPref;
+}
+
+nsSize nsIFrame::XULBoundsCheckMinMax(const nsSize& aMinSize,
+ const nsSize& aMaxSize) {
+ return nsSize(std::max(aMaxSize.width, aMinSize.width),
+ std::max(aMaxSize.height, aMinSize.height));
+}
+
+nsSize nsIFrame::XULBoundsCheck(const nsSize& aMinSize, const nsSize& aPrefSize,
+ const nsSize& aMaxSize) {
+ return nsSize(
+ XULBoundsCheck(aMinSize.width, aPrefSize.width, aMaxSize.width),
+ XULBoundsCheck(aMinSize.height, aPrefSize.height, aMaxSize.height));
+}
+
+/*static*/
+nsIFrame* nsIFrame::GetChildXULBox(const nsIFrame* aFrame) {
+ // box layout ends at box-wrapped frames, so don't allow these frames
+ // to report child boxes.
+ return aFrame->IsXULBoxFrame() ? aFrame->PrincipalChildList().FirstChild()
+ : nullptr;
+}
+
+/*static*/
+nsIFrame* nsIFrame::GetNextXULBox(const nsIFrame* aFrame) {
+ return aFrame->GetParent() && aFrame->GetParent()->IsXULBoxFrame()
+ ? aFrame->GetNextSibling()
+ : nullptr;
+}
+
+/*static*/
+nsIFrame* nsIFrame::GetParentXULBox(const nsIFrame* aFrame) {
+ return aFrame->GetParent() && aFrame->GetParent()->IsXULBoxFrame()
+ ? aFrame->GetParent()
+ : nullptr;
+}