https://bugs.webkit.org/show_bug.cgi?id=91440

Patch by Uday Kiran <udaykiran@motorola.com> on 2013-02-06
Reviewed by Antti Koivisto.

vmax is implemented as primitive length unit.
New length type ViewportPercentageMax is added and included support for fetching the value
of this viewport percentage unit based on current viewport size.

The specification related to this implementation is
http://dev.w3.org/csswg/css3-values/#viewport-relative-lengths.

Source/WebCore:

Tests: css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vmax-absolute.html
       css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vmax.html

* css/CSSGrammar.y.in: Added vmax support.
* css/CSSParser.cpp: Parsing of vmax unit.
(WebCore::CSSParser::validUnit): Added vmax to valid units.
(WebCore::CSSParser::createPrimitiveNumericValue): Added vmax to primitive untis.
(WebCore::CSSParser::parseValidPrimitive): Creation of CSSPrimitive for vmax.
(WebCore::CSSParser::detectNumberToken): Parsing of vmax token.
* css/CSSParserValues.cpp:
(WebCore::CSSParserValue::createCSSValue): Added support for vmax.
* css/CSSPrimitiveValue.cpp:
(WebCore::isValidCSSUnitTypeForDoubleConversion): Added support for vmax.
(WebCore::unitCategory): Ditto.
(WebCore::CSSPrimitiveValue::CSSPrimitiveValue): Ditto.
(WebCore::CSSPrimitiveValue::cleanup):
(WebCore::CSSPrimitiveValue::customCssText): Added support for vmax.
(WebCore::CSSPrimitiveValue::viewportPercentageLength): Function to create the Length structure for the viewport-percentage unit types.
(WebCore::CSSPrimitiveValue::cloneForCSSOM):
* css/CSSPrimitiveValue.h:
(WebCore::CSSPrimitiveValue::isViewportPercentageLength): Checks whether the primitive value is ViewportPercentage Length.
* css/CSSPrimitiveValue.idl: Added support for vmax.
* css/LengthFunctions.cpp: Calcuation of length value based on the current viewport size.
(WebCore::minimumValueForLength):
(WebCore::valueForLength):
(WebCore::floatValueForLength):
* platform/Length.h:
(WebCore::Length::isViewportPercentage): To check the Length is of type ViewportPercentage.
* rendering/RenderBox.cpp:
(WebCore::RenderBox::computeReplacedLogicalWidthUsing):
(WebCore::RenderBox::computeReplacedLogicalHeightUsing):

LayoutTests:

* css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-getStyle-expected.txt:
* css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-getStyle.html:
* css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vmax-absolute-expected.html: Added.
* css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vmax-absolute.html: Added.
* css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vmax-expected.html: Added.
* css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vmax.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142021 268f45cc-cd09-0410-ab3c-d52691b4dbfc