// Deflate the rect by the specified margin
void nsRect::Deflate(const nsMargin &aMargin)
{
x += aMargin.left;
y += aMargin.top;
width = PR_MAX(0, width - aMargin.LeftRight());
height = PR_MAX(0, height - aMargin.TopBottom());
}
NS_IMETHODIMP
nsBox::GetPadding(nsMargin& aMargin)
{
const nsStyleDisplay *disp = GetStyleDisplay();
if (disp->mAppearance && gTheme) {
// Go to the theme for the padding.
nsPresContext *context = PresContext();
if (gTheme->ThemeSupportsWidget(context, this, disp->mAppearance)) {
nsIntMargin margin(0, 0, 0, 0);
PRBool useThemePadding;
useThemePadding = gTheme->GetWidgetPadding(context->DeviceContext(),
this, disp->mAppearance,
&margin);
if (useThemePadding) {
aMargin.top = context->DevPixelsToAppUnits(margin.top);
aMargin.right = context->DevPixelsToAppUnits(margin.right);
aMargin.bottom = context->DevPixelsToAppUnits(margin.bottom);
aMargin.left = context->DevPixelsToAppUnits(margin.left);
return NS_OK;
}
}
}
aMargin.SizeTo(0,0,0,0);
GetStylePadding()->GetPadding(aMargin);
return NS_OK;
}
NS_IMETHODIMP
nsBox::GetBorder(nsMargin& aMargin)
{
aMargin.SizeTo(0,0,0,0);
const nsStyleDisplay* disp = GetStyleDisplay();
if (disp->mAppearance && gTheme) {
// Go to the theme for the border.
nsPresContext *context = PresContext();
if (gTheme->ThemeSupportsWidget(context, this, disp->mAppearance)) {
nsIntMargin margin(0, 0, 0, 0);
gTheme->GetWidgetBorder(context->DeviceContext(), this,
disp->mAppearance, &margin);
aMargin.top = context->DevPixelsToAppUnits(margin.top);
aMargin.right = context->DevPixelsToAppUnits(margin.right);
aMargin.bottom = context->DevPixelsToAppUnits(margin.bottom);
aMargin.left = context->DevPixelsToAppUnits(margin.left);
return NS_OK;
}
}
aMargin = GetStyleBorder()->GetActualBorder();
return NS_OK;
}
NS_IMETHODIMP
nsScrollbarFrame::GetMargin(nsMargin& aMargin)
{
aMargin.SizeTo(0,0,0,0);
if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0) {
nsPresContext* presContext = PresContext();
nsITheme* theme = presContext->GetTheme();
if (theme) {
nsIntSize size;
bool isOverridable;
nsRefPtr<nsRenderingContext> rc =
presContext->PresShell()->GetReferenceRenderingContext();
theme->GetMinimumWidgetSize(rc, this, NS_THEME_SCROLLBAR, &size,
&isOverridable);
if (IsHorizontal()) {
aMargin.top = -presContext->DevPixelsToAppUnits(size.height);
}
else {
if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
aMargin.right = -presContext->DevPixelsToAppUnits(size.width);
}
else {
aMargin.left = -presContext->DevPixelsToAppUnits(size.width);
}
}
return NS_OK;
}
}
return nsBox::GetMargin(aMargin);
}
// Helper function to compute the offset needed to center a child
// page-frame's margin-box inside our content-box.
nscoord
nsSimplePageSequenceFrame::ComputeCenteringMargin(
nscoord aContainerContentBoxWidth,
nscoord aChildPaddingBoxWidth,
const nsMargin& aChildPhysicalMargin)
{
// We'll be centering our child's margin-box, so get the size of that:
nscoord childMarginBoxWidth =
aChildPaddingBoxWidth + aChildPhysicalMargin.LeftRight();
// When rendered, our child's rect will actually be scaled up by the
// print-preview scale factor, via ComputePageSequenceTransform().
// We really want to center *that scaled-up rendering* inside of
// aContainerContentBoxWidth. So, we scale up its margin-box here...
auto ppScale = PresContext()->GetPrintPreviewScale();
nscoord scaledChildMarginBoxWidth =
NSToCoordRound(childMarginBoxWidth * ppScale);
// ...and see we how much space is left over, when we subtract that scaled-up
// size from the container width:
nscoord scaledExtraSpace =
aContainerContentBoxWidth - scaledChildMarginBoxWidth;
if (scaledExtraSpace <= 0) {
// (Don't bother centering if there's zero/negative space.)
return 0;
}
// To center the child, we want to give it an additional left-margin of half
// of the extra space. And then, we have to scale that space back down, so
// that it'll produce the correct scaled-up amount when we render (because
// rendering will scale it back up):
return NSToCoordRound(scaledExtraSpace * 0.5 / ppScale);
}
NS_IMETHODIMP
nsBox::GetMargin(nsMargin& aMargin)
{
aMargin.SizeTo(0,0,0,0);
GetStyleMargin()->GetMargin(aMargin);
return NS_OK;
}
nsresult
nsBox::GetMargin(nsMargin& aMargin)
{
aMargin.SizeTo(0,0,0,0);
StyleMargin()->GetMargin(aMargin);
return NS_OK;
}
// Helper-function that lets us clone the button's reflow state, but with its
// ComputedWidth and ComputedHeight reduced by the amount of renderer-specific
// focus border and padding that we're using. (This lets us provide a more
// appropriate content-box size for descendents' percent sizes to resolve
// against.)
static nsHTMLReflowState
CloneReflowStateWithReducedContentBox(
const nsHTMLReflowState& aButtonReflowState,
const nsMargin& aFocusPadding)
{
nscoord adjustedWidth =
aButtonReflowState.ComputedWidth() - aFocusPadding.LeftRight();
adjustedWidth = std::max(0, adjustedWidth);
// (Only adjust height if it's an actual length.)
nscoord adjustedHeight = aButtonReflowState.ComputedHeight();
if (adjustedHeight != NS_INTRINSICSIZE) {
adjustedHeight -= aFocusPadding.TopBottom();
adjustedHeight = std::max(0, adjustedHeight);
}
nsHTMLReflowState clone(aButtonReflowState);
clone.SetComputedWidth(adjustedWidth);
clone.SetComputedHeight(adjustedHeight);
return clone;
}
NS_IMETHODIMP
nsIFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)
{
aBorderAndPadding.SizeTo(0, 0, 0, 0);
nsresult rv = GetBorder(aBorderAndPadding);
if (NS_FAILED(rv))
return rv;
nsMargin padding;
rv = GetPadding(padding);
if (NS_FAILED(rv))
return rv;
aBorderAndPadding += padding;
return rv;
}
nsresult
TableBackgroundPainter::TableBackgroundData::SetBCBorder(nsMargin& aBorder,
TableBackgroundPainter* aPainter)
{
NS_PRECONDITION(aPainter, "null painter");
if (!mSynthBorder) {
mSynthBorder = new (aPainter->mPresContext)
nsStyleBorder(aPainter->mZeroBorder);
if (!mSynthBorder) return NS_ERROR_OUT_OF_MEMORY;
}
NS_FOR_CSS_SIDES(side) {
mSynthBorder->SetBorderWidth(side, aBorder.Side(side));
}
mBorder = mSynthBorder;
return NS_OK;
}
nsresult
nsScrollbarFrame::GetScrollbarMargin(
nsMargin& aMargin,
mozilla::ScrollFrameHelper::eScrollbarSide aSide)
{
nsresult rv = NS_ERROR_FAILURE;
aMargin.SizeTo(0,0,0,0);
if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0) {
nsPresContext* presContext = PresContext();
nsITheme* theme = presContext->GetTheme();
if (theme) {
LayoutDeviceIntSize size;
bool isOverridable;
theme->GetMinimumWidgetSize(presContext, this, NS_THEME_SCROLLBAR, &size,
&isOverridable);
if (IsHorizontal()) {
aMargin.top = -presContext->DevPixelsToAppUnits(size.height);
}
else {
aMargin.left = -presContext->DevPixelsToAppUnits(size.width);
}
rv = NS_OK;
}
}
if (NS_FAILED(rv)) {
rv = nsBox::GetMargin(aMargin);
}
if (NS_SUCCEEDED(rv) && aSide == ScrollFrameHelper::eScrollbarOnLeft) {
Swap(aMargin.left, aMargin.right);
}
return rv;
}
void
nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsIFrame* aFirstKid,
nsMargin aFocusPadding,
nsReflowStatus& aStatus)
{
nsSize availSize(aReflowState.ComputedWidth(), NS_INTRINSICSIZE);
// Indent the child inside us by the focus border. We must do this separate
// from the regular border.
availSize.width -= aFocusPadding.LeftRight();
// See whether out availSize's width is big enough. If it's smaller than our
// intrinsic min width, that means that the kid wouldn't really fit; for a
// better look in such cases we adjust the available width and our left
// offset to allow the kid to spill left into our padding.
nscoord xoffset = aFocusPadding.left + aReflowState.mComputedBorderPadding.left;
nscoord extrawidth = GetMinWidth(aReflowState.rendContext) -
aReflowState.ComputedWidth();
if (extrawidth > 0) {
nscoord extraleft = extrawidth / 2;
nscoord extraright = extrawidth - extraleft;
NS_ASSERTION(extraright >=0, "How'd that happen?");
// Do not allow the extras to be bigger than the relevant padding
extraleft = std::min(extraleft, aReflowState.mComputedPadding.left);
extraright = std::min(extraright, aReflowState.mComputedPadding.right);
xoffset -= extraleft;
availSize.width += extraleft + extraright;
}
availSize.width = std::max(availSize.width,0);
nsHTMLReflowState reflowState(aPresContext, aReflowState, aFirstKid,
availSize);
ReflowChild(aFirstKid, aPresContext, aDesiredSize, reflowState,
xoffset,
aFocusPadding.top + aReflowState.mComputedBorderPadding.top,
0, aStatus);
// Compute our desired height before vertically centering our children
nscoord actualDesiredHeight = 0;
if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
actualDesiredHeight = aReflowState.ComputedHeight();
} else {
actualDesiredHeight = aDesiredSize.height + aFocusPadding.TopBottom();
// Make sure we obey min/max-height in the case when we're doing intrinsic
// sizing (we get it for free when we have a non-intrinsic
// aReflowState.ComputedHeight()). Note that we do this before adjusting
// for borderpadding, since mComputedMaxHeight and mComputedMinHeight are
// content heights.
actualDesiredHeight = NS_CSS_MINMAX(actualDesiredHeight,
aReflowState.mComputedMinHeight,
aReflowState.mComputedMaxHeight);
}
// center child vertically in the content area
nscoord yoff = (actualDesiredHeight - aFocusPadding.TopBottom() - aDesiredSize.height) / 2;
if (yoff < 0) {
yoff = 0;
}
// Place the child
FinishReflowChild(aFirstKid, aPresContext, &reflowState, aDesiredSize,
xoffset,
yoff + aFocusPadding.top + aReflowState.mComputedBorderPadding.top, 0);
if (aDesiredSize.ascent == nsHTMLReflowMetrics::ASK_FOR_BASELINE)
aDesiredSize.ascent = aFirstKid->GetBaseline();
// Adjust the baseline by our offset (since we moved the child's
// baseline by that much), and set our actual desired height.
aDesiredSize.ascent += yoff;
aDesiredSize.height = actualDesiredHeight;
}
void
nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aButtonDesiredSize,
const nsHTMLReflowState& aButtonReflowState,
nsIFrame* aFirstKid)
{
// Buttons have some bonus renderer-determined border/padding,
// which occupies part of the button's content-box area:
const nsMargin focusPadding = mRenderer.GetAddedButtonBorderAndPadding();
WritingMode wm = aFirstKid->GetWritingMode();
LogicalSize availSize = aButtonReflowState.ComputedSize(GetWritingMode());
availSize.BSize(wm) = NS_INTRINSICSIZE;
// Indent the child inside us by the focus border. We must do this separate
// from the regular border.
availSize.ISize(wm) -= LogicalMargin(wm, focusPadding).IStartEnd(wm);
// See whether out availSize's width is big enough. If it's smaller than our
// intrinsic min width, that means that the kid wouldn't really fit; for a
// better look in such cases we adjust the available width and our left
// offset to allow the kid to spill left into our padding.
nscoord xoffset = focusPadding.left +
aButtonReflowState.ComputedPhysicalBorderPadding().left;
nscoord extrawidth = GetMinISize(aButtonReflowState.rendContext) -
aButtonReflowState.ComputedWidth();
if (extrawidth > 0) {
nscoord extraleft = extrawidth / 2;
nscoord extraright = extrawidth - extraleft;
NS_ASSERTION(extraright >=0, "How'd that happen?");
// Do not allow the extras to be bigger than the relevant padding
extraleft = std::min(extraleft, aButtonReflowState.ComputedPhysicalPadding().left);
extraright = std::min(extraright, aButtonReflowState.ComputedPhysicalPadding().right);
xoffset -= extraleft;
availSize.Width(wm) = availSize.Width(wm) + extraleft + extraright;
}
availSize.Width(wm) = std::max(availSize.Width(wm), 0);
// Give child a clone of the button's reflow state, with height/width reduced
// by focusPadding, so that descendants with height:100% don't protrude.
nsHTMLReflowState adjustedButtonReflowState =
CloneReflowStateWithReducedContentBox(aButtonReflowState, focusPadding);
nsHTMLReflowState contentsReflowState(aPresContext,
adjustedButtonReflowState,
aFirstKid, availSize);
nsReflowStatus contentsReflowStatus;
nsHTMLReflowMetrics contentsDesiredSize(aButtonReflowState);
ReflowChild(aFirstKid, aPresContext,
contentsDesiredSize, contentsReflowState,
xoffset,
focusPadding.top + aButtonReflowState.ComputedPhysicalBorderPadding().top,
0, contentsReflowStatus);
MOZ_ASSERT(NS_FRAME_IS_COMPLETE(contentsReflowStatus),
"We gave button-contents frame unconstrained available height, "
"so it should be complete");
// Compute the button's content-box height:
nscoord buttonContentBoxHeight = 0;
if (aButtonReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
// Button has a fixed height -- that's its content-box height.
buttonContentBoxHeight = aButtonReflowState.ComputedHeight();
} else {
// Button is intrinsically sized -- it should shrinkwrap the
// button-contents' height, plus any focus-padding space:
buttonContentBoxHeight =
contentsDesiredSize.Height() + focusPadding.TopBottom();
// Make sure we obey min/max-height in the case when we're doing intrinsic
// sizing (we get it for free when we have a non-intrinsic
// aButtonReflowState.ComputedHeight()). Note that we do this before
// adjusting for borderpadding, since mComputedMaxHeight and
// mComputedMinHeight are content heights.
buttonContentBoxHeight =
NS_CSS_MINMAX(buttonContentBoxHeight,
aButtonReflowState.ComputedMinHeight(),
aButtonReflowState.ComputedMaxHeight());
}
// Center child vertically in the button
// (technically, inside of the button's focus-padding area)
nscoord extraSpace =
buttonContentBoxHeight - focusPadding.TopBottom() -
contentsDesiredSize.Height();
nscoord yoffset = std::max(0, extraSpace / 2);
// Adjust yoffset to be in terms of the button's frame-rect, instead of
// its focus-padding rect:
yoffset += focusPadding.top + aButtonReflowState.ComputedPhysicalBorderPadding().top;
// Place the child
FinishReflowChild(aFirstKid, aPresContext,
contentsDesiredSize, &contentsReflowState,
xoffset, yoffset, 0);
// Make sure we have a useful 'ascent' value for the child
if (contentsDesiredSize.BlockStartAscent() ==
nsHTMLReflowMetrics::ASK_FOR_BASELINE) {
WritingMode wm = aButtonReflowState.GetWritingMode();
contentsDesiredSize.SetBlockStartAscent(aFirstKid->GetLogicalBaseline(wm));
}
// OK, we're done with the child frame.
// Use what we learned to populate the button frame's reflow metrics.
// * Button's height & width are content-box size + border-box contribution:
aButtonDesiredSize.Width() = aButtonReflowState.ComputedWidth() +
aButtonReflowState.ComputedPhysicalBorderPadding().LeftRight();
aButtonDesiredSize.Height() = buttonContentBoxHeight +
aButtonReflowState.ComputedPhysicalBorderPadding().TopBottom();
// * Button's ascent is its child's ascent, plus the child's y-offset
// within our frame:
aButtonDesiredSize.SetBlockStartAscent(contentsDesiredSize.BlockStartAscent() +
yoffset);
aButtonDesiredSize.SetOverflowAreasToDesiredBounds();
}
void
nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsIFrame* aFirstKid,
nsMargin aFocusPadding,
nsReflowStatus& aStatus)
{
nsSize availSize(aReflowState.ComputedWidth(), NS_INTRINSICSIZE);
// Indent the child inside us by the focus border. We must do this separate
// from the regular border.
availSize.width -= aFocusPadding.LeftRight();
// See whether out availSize's width is big enough. If it's smaller than our
// intrinsic min width, that means that the kid wouldn't really fit; for a
// better look in such cases we adjust the available width and our left
// offset to allow the kid to spill left into our padding.
nscoord xoffset = aFocusPadding.left + aReflowState.mComputedBorderPadding.left;
nscoord extrawidth = GetMinWidth(aReflowState.rendContext) -
aReflowState.ComputedWidth();
if (extrawidth > 0) {
nscoord extraleft = extrawidth / 2;
nscoord extraright = extrawidth - extraleft;
NS_ASSERTION(extraright >=0, "How'd that happen?");
// Do not allow the extras to be bigger than the relevant padding
extraleft = std::min(extraleft, aReflowState.mComputedPadding.left);
extraright = std::min(extraright, aReflowState.mComputedPadding.right);
xoffset -= extraleft;
availSize.width += extraleft + extraright;
}
availSize.width = std::max(availSize.width,0);
nsHTMLReflowState reflowState(aPresContext, aReflowState, aFirstKid,
availSize);
ReflowChild(aFirstKid, aPresContext, aDesiredSize, reflowState,
xoffset,
aFocusPadding.top + aReflowState.mComputedBorderPadding.top,
0, aStatus);
// calculate the min internal height so the contents gets centered correctly.
// XXXbz this assumes border-box sizing.
nscoord minInternalHeight = aReflowState.mComputedMinHeight -
aReflowState.mComputedBorderPadding.TopBottom();
minInternalHeight = std::max(minInternalHeight, 0);
// center child vertically
nscoord yoff = 0;
if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
yoff = (aReflowState.ComputedHeight() - aDesiredSize.height)/2;
if (yoff < 0) {
yoff = 0;
}
} else if (aDesiredSize.height < minInternalHeight) {
yoff = (minInternalHeight - aDesiredSize.height) / 2;
}
// Place the child
FinishReflowChild(aFirstKid, aPresContext, &reflowState, aDesiredSize,
xoffset,
yoff + aFocusPadding.top + aReflowState.mComputedBorderPadding.top, 0);
if (aDesiredSize.ascent == nsHTMLReflowMetrics::ASK_FOR_BASELINE)
aDesiredSize.ascent = aFirstKid->GetBaseline();
// Adjust the baseline by our offset (since we moved the child's
// baseline by that much).
aDesiredSize.ascent += yoff;
}
nsresult
nsGroupBoxFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)
{
aBorderAndPadding.SizeTo(0,0,0,0);
return NS_OK;
}
NS_IMETHODIMP
nsGroupBoxFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)
{
aBorderAndPadding.SizeTo(0,0,0,0);
return NS_OK;
}
