https://bugs.webkit.org/show_bug.cgi?id=52040

Source/WebCore:

Reviewed by Antti Koivisto, Sam Weinig.

Merge object-fit patch from Blink r156535, which started as a patch
by me.

Since then, the spec has gone to CR. This patch is an
implementation of object-fit as described in
http://www.w3.org/TR/2012/CR-css3-images-20120417/#object-fit

Object-fit is used to maintain the aspect ratio of replaced content
within its content box. All object-fit values but the initial one
('fill') will always ensure that the aspect ratio is retained, in
different ways (fit inside the content box, cover the content box, or
use intrinsic size). Painting is always clipped against the content
box, regardless of the 'overflow' property.

Tests: fast/css/object-fit/object-fit-canvas.html
       fast/css/object-fit/object-fit-embed.html
       fast/css/object-fit/object-fit-grow-landscape.html
       fast/css/object-fit/object-fit-grow-portrait.html
       fast/css/object-fit/object-fit-img-svg.html
       fast/css/object-fit/object-fit-img-svg2.html
       fast/css/object-fit/object-fit-img.html
       fast/css/object-fit/object-fit-input-image.html
       fast/css/object-fit/object-fit-object.html
       fast/css/object-fit/object-fit-shrink.html
       fast/css/object-fit/object-fit-video-poster.html
       fast/css/parsing-object-fit.html
       http/tests/css/object-fit-delayed-img-svg.html
       media/video-object-fit-change.html
       media/video-object-fit.html

* css/CSSComputedStyleDeclaration.cpp:
(WebCore::ComputedStyleExtractor::propertyValue):
* css/CSSParser.cpp:
(WebCore::isValidKeywordPropertyAndValue):
(WebCore::isKeywordPropertyID):
(WebCore::CSSParser::parseValue):
* css/CSSPrimitiveValueMappings.h:
(WebCore::CSSPrimitiveValue::CSSPrimitiveValue):
(WebCore::CSSPrimitiveValue::operator EObjectFit):
* css/CSSProperty.cpp:
(WebCore::CSSProperty::isInheritedProperty):
* css/CSSPropertyNames.in:
* css/CSSValueKeywords.in:
* css/DeprecatedStyleBuilder.cpp:
(WebCore::DeprecatedStyleBuilder::DeprecatedStyleBuilder):
* css/StyleResolver.cpp:
(WebCore::StyleResolver::applyProperty):
* css/html.css:
(video): Set object-fit to 'contain'. This is how VIDEO elements
work, apparently.
* loader/cache/CachedImage.cpp:
(WebCore::CachedImage::imageSizeForRenderer):
* loader/cache/CachedImage.h:
* platform/graphics/LayoutSize.h:
(WebCore::fitLayoutSizeToAspectRatio): New function to grow or shrink
in one dimension to fit to the aspect ratio.
* rendering/RenderHTMLCanvas.cpp:
(WebCore::RenderHTMLCanvas::paintReplaced): Apply object-fit and
clip if necessary.
* rendering/RenderImage.cpp:
(WebCore::RenderImage::updateInnerContentRect):
(WebCore::RenderImage::imageDimensionsChanged): Update intrinsic
size properly, and recalculate the inner content rectangle (the
exact area occupied by the replaced content) again if appropriate.
(WebCore::RenderImage::paintReplaced): Apply object-fit and clip
if necessary.
(WebCore::RenderImage::foregroundIsKnownToBeOpaqueInRect):
object-fit may leave parts of the content box empty, in which case
it won't be fully obscured.
(WebCore::RenderImage::layout):
* rendering/RenderImage.h:
* rendering/RenderImageResource.cpp:
(WebCore::RenderImageResource::intrinsicSize): Need this to
differentiate between intrinsic and extrinsic size for SVG images.
* rendering/RenderImageResource.h:
* rendering/RenderImageResourceStyleImage.h:
* rendering/RenderReplaced.cpp:
(WebCore::RenderReplaced::replacedContentRect): Return the
rectangle occupied by the replaced content. This will be identical
to the content box if object-fit is 'fill', but will typically be
something else for other values.
* rendering/RenderReplaced.h:
* rendering/RenderVideo.cpp:
(WebCore::RenderVideo::videoBox): Not much left to do here, with
the new RenderReplaced::replacedContentRect() method in place.
(WebCore::RenderVideo::paintReplaced): Apply object-fit and clip
if necessary.
* rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::changeRequiresRepaint):
* rendering/style/RenderStyle.h:
* rendering/style/RenderStyleConstants.h:
* rendering/style/StyleRareNonInheritedData.cpp:
(WebCore::StyleRareNonInheritedData::StyleRareNonInheritedData):
(WebCore::StyleRareNonInheritedData::operator==):
* rendering/style/StyleRareNonInheritedData.h:

LayoutTests:

Reviewed by Antti Koivisto, Sam Weinig.

Tests for object-fit.

* fast/css/object-fit/object-fit-canvas-expected.html: Added.
* fast/css/object-fit/object-fit-canvas.html: Added.
* fast/css/object-fit/object-fit-embed-expected.html: Added.
* fast/css/object-fit/object-fit-embed.html: Added.
* fast/css/object-fit/object-fit-grow-landscape-expected.html: Added.
* fast/css/object-fit/object-fit-grow-landscape.html: Added.
* fast/css/object-fit/object-fit-grow-portrait-expected.html: Added.
* fast/css/object-fit/object-fit-grow-portrait.html: Added.
* fast/css/object-fit/object-fit-img-expected.html: Added.
* fast/css/object-fit/object-fit-img-svg-expected.html: Added.
* fast/css/object-fit/object-fit-img-svg.html: Added.
* fast/css/object-fit/object-fit-img-svg2-expected.html: Added.
* fast/css/object-fit/object-fit-img-svg2.html: Added.
* fast/css/object-fit/object-fit-img.html: Added.
* fast/css/object-fit/object-fit-input-image-expected.html: Added.
* fast/css/object-fit/object-fit-input-image.html: Added.
* fast/css/object-fit/object-fit-object-expected.html: Added.
* fast/css/object-fit/object-fit-object.html: Added.
* fast/css/object-fit/object-fit-shrink-expected.html: Added.
* fast/css/object-fit/object-fit-shrink.html: Added.
* fast/css/object-fit/object-fit-video-poster-expected.html: Added.
* fast/css/object-fit/object-fit-video-poster.html: Added.
* fast/css/parsing-object-fit-expected.txt: Added.
* fast/css/parsing-object-fit.html: Added.
* fast/css/resources/circle.svg: Added.
* fast/css/resources/circle2.svg: Added.
* fast/css/resources/circles-landscape-small.png: Added.
* fast/css/resources/circles-landscape.png: Added.
* fast/css/resources/circles-portrait-small.png: Added.
* fast/css/resources/circles-portrait.png: Added.
* http/tests/css/object-fit-delayed-img-svg-expected.html: Added.
* http/tests/css/object-fit-delayed-img-svg.html: Added.
* media/video-object-fit-change-expected.html: Added.
* media/video-object-fit-change.html: Added.
* media/video-object-fit-expected.html: Added.
* media/video-object-fit.html: Added.
* platform/mac/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154858 268f45cc-cd09-0410-ab3c-d52691b4dbfc