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issue #908 - implement missing parts of CSS mask

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This commit is contained in:
yami 2018-12-16 16:17:20 +01:00 • committed by Roy Tam
commit b5376e63c5
28 changed files with 574 additions and 449 deletions
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127
layout/base/nsLayoutUtils.cpp
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@ -117,6 +117,7 @@
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSetHandleInlines.h"
#include "RegionBuilder.h"
#include "SVGSVGElement.h"
#ifdef MOZ_XUL
#include "nsXULPopupManager.h"
@ -6935,7 +6936,7 @@ nsLayoutUtils::GetFrameTransparency(nsIFrame* aBackgroundFrame,
const nsStyleBackground* bg = bgSC->StyleBackground();
if (NS_GET_A(bg->mBackgroundColor) < 255 ||
// bottom layer's clip is used for the color
bg->BottomLayer().mClip != NS_STYLE_IMAGELAYER_CLIP_BORDER)
bg->BottomLayer().mClip != StyleGeometryBox::Border)
return eTransparencyTransparent;
return eTransparencyOpaque;
}
@ -9293,3 +9294,127 @@ nsLayoutUtils::IsInvisibleBreak(nsINode* aNode, nsIFrame** aNextLineFrame)
return lineNonEmpty;
}
static nsRect
ComputeSVGReferenceRect(nsIFrame* aFrame,
StyleGeometryBox aGeometryBox)
{
MOZ_ASSERT(aFrame->GetContent()->IsSVGElement());
nsRect r;
// For SVG elements without associated CSS layout box, the used value for
// content-box, padding-box, border-box and margin-box is fill-box.
switch (aGeometryBox) {
case StyleGeometryBox::Stroke: {
// XXX Bug 1299876
// The size of srtoke-box is not correct if this graphic element has
// specific stroke-linejoin or stroke-linecap.
gfxRect bbox = nsSVGUtils::GetBBox(aFrame,
nsSVGUtils::eBBoxIncludeFill | nsSVGUtils::eBBoxIncludeStroke);
r = nsLayoutUtils::RoundGfxRectToAppRect(bbox,
nsPresContext::AppUnitsPerCSSPixel());
break;
}
case StyleGeometryBox::View: {
nsIContent* content = aFrame->GetContent();
nsSVGElement* element = static_cast<nsSVGElement*>(content);
SVGSVGElement* svgElement = element->GetCtx();
MOZ_ASSERT(svgElement);
if (svgElement && svgElement->HasViewBoxRect()) {
// If a ‘viewBox‘ attribute is specified for the SVG viewport creating
// element:
// 1. The reference box is positioned at the origin of the coordinate
// system established by the ‘viewBox‘ attribute.
// 2. The dimension of the reference box is set to the width and height
// values of the ‘viewBox‘ attribute.
nsSVGViewBox* viewBox = svgElement->GetViewBox();
const nsSVGViewBoxRect& value = viewBox->GetAnimValue();
r = nsRect(nsPresContext::CSSPixelsToAppUnits(value.x),
nsPresContext::CSSPixelsToAppUnits(value.y),
nsPresContext::CSSPixelsToAppUnits(value.width),
nsPresContext::CSSPixelsToAppUnits(value.height));
} else {
// No viewBox is specified, uses the nearest SVG viewport as reference
// box.
svgFloatSize viewportSize = svgElement->GetViewportSize();
r = nsRect(0, 0,
nsPresContext::CSSPixelsToAppUnits(viewportSize.width),
nsPresContext::CSSPixelsToAppUnits(viewportSize.height));
}
break;
}
case StyleGeometryBox::NoBox:
case StyleGeometryBox::Border:
case StyleGeometryBox::Content:
case StyleGeometryBox::Padding:
case StyleGeometryBox::Margin:
case StyleGeometryBox::Fill: {
gfxRect bbox = nsSVGUtils::GetBBox(aFrame,
nsSVGUtils::eBBoxIncludeFill);
r = nsLayoutUtils::RoundGfxRectToAppRect(bbox,
nsPresContext::AppUnitsPerCSSPixel());
break;
}
default:{
MOZ_ASSERT_UNREACHABLE("unknown StyleGeometryBox type");
gfxRect bbox = nsSVGUtils::GetBBox(aFrame,
nsSVGUtils::eBBoxIncludeFill);
r = nsLayoutUtils::RoundGfxRectToAppRect(bbox,
nsPresContext::AppUnitsPerCSSPixel());
break;
}
}
return r;
}
static nsRect
ComputeHTMLReferenceRect(nsIFrame* aFrame,
StyleGeometryBox aGeometryBox)
{
nsRect r;
// For elements with associated CSS layout box, the used value for fill-box,
// stroke-box and view-box is border-box.
switch (aGeometryBox) {
case StyleGeometryBox::Content:
r = aFrame->GetContentRectRelativeToSelf();
break;
case StyleGeometryBox::Padding:
r = aFrame->GetPaddingRectRelativeToSelf();
break;
case StyleGeometryBox::Margin:
r = aFrame->GetMarginRectRelativeToSelf();
break;
case StyleGeometryBox::NoBox:
case StyleGeometryBox::Border:
case StyleGeometryBox::Fill:
case StyleGeometryBox::Stroke:
case StyleGeometryBox::View:
r = aFrame->GetRectRelativeToSelf();
break;
default:
MOZ_ASSERT_UNREACHABLE("unknown StyleGeometryBox type");
r = aFrame->GetRectRelativeToSelf();
break;
}
return r;
}
/* static */ nsRect
nsLayoutUtils::ComputeGeometryBox(nsIFrame* aFrame,
StyleGeometryBox aGeometryBox)
{
// We use ComputeSVGReferenceRect for all SVG elements, except <svg>
// element, which does have an associated CSS layout box. In this case we
// should still use ComputeHTMLReferenceRect for region computing.
nsRect r = aFrame->IsFrameOfType(nsIFrame::eSVG) &&
(aFrame->GetType() != nsGkAtoms::svgOuterSVGFrame)
? ComputeSVGReferenceRect(aFrame, aGeometryBox)
: ComputeHTMLReferenceRect(aFrame, aGeometryBox);
return r;
}