New implementation of full page zoom.  Because of how much doesn't transform when zooming, and because
        of the need to obey viewport constraints, I decided to take a completely different approach.  Now CSS
        lengths and intrinsic sizes are simply adjusted by the zoom factor.  This approach works much better and
        avoids pixel cracks more than the old approach.   In addition widgets "just work", namely plugins zoom
        and scrollbars do not.

        This patch also implements the IE zoom CSS property.  This property allows fine-grained control over
        zooming at the element level.  It takes values of normal | <number> | <percentage> to match WinIE.  In
        addition, in the vein of text-size-adjust for text zooming, I have extended the zoom property with an
        extra value, reset.  The reset keyword can be used to prevent a section of the page from scaling at all
        when a zoom is applied.

        Reviewed by olliej

        * css/CSSComputedStyleDeclaration.cpp:
        (WebCore::):
        (WebCore::CSSComputedStyleDeclaration::getPropertyCSSValue):
        Support the new 'zoom' property for getComputedStyle.

        * css/CSSParser.cpp:
        (WebCore::CSSParser::parseValue):
        Code that parses the 'zoom' property.

        * css/CSSPrimitiveValue.cpp:
        (WebCore::CSSPrimitiveValue::computeLengthInt):
        (WebCore::CSSPrimitiveValue::computeLengthIntForLength):
        (WebCore::CSSPrimitiveValue::computeLengthShort):
        (WebCore::CSSPrimitiveValue::computeLengthFloat):
        (WebCore::CSSPrimitiveValue::computeLengthDouble):
        * css/CSSPrimitiveValue.h:
        Extend all of the computeLength methods to take a multiplier so that lengths can be adjusted by the
        zoom factor.

        * css/CSSPropertyNames.in:
        Add the new zoom property to the list of properties we understand.

        * css/CSSStyleSelector.cpp:
        (WebCore::CSSStyleSelector::applyDeclarations):
        (WebCore::CSSStyleSelector::applyProperty):
        (WebCore::CSSStyleSelector::mapBackgroundSize):
        (WebCore::CSSStyleSelector::mapBackgroundXPosition):
        (WebCore::CSSStyleSelector::mapBackgroundYPosition):
        (WebCore::CSSStyleSelector::getComputedSizeFromSpecifiedSize):
        * css/CSSStyleSelector.h:
        (WebCore::CSSStyleSelector::setStyle):
        Pass in the zoom factor when computing all lengths in CSS.

        * css/CSSValueKeywords.in:
        Add support for the 'reset' keyword of the zoom property.

        * dom/Document.cpp:
        (WebCore::Document::recalcStyle):
        Set the 'zoom' CSS property on the RenderView.  This is how we implement full page zoom.

        * html/CanvasRenderingContext2D.cpp:
        (WebCore::size):
        Make sure the back end canvas size ignores zooming when rendering images.

        * html/HTMLImageElement.cpp:
        (WebCore::HTMLImageElement::width):
        (WebCore::HTMLImageElement::height):
        (WebCore::HTMLImageElement::naturalWidth):
        (WebCore::HTMLImageElement::naturalHeight):
        Use the unzoomed width/height if we have no style information in HTMLImageElement.cpp.

        * loader/CachedImage.cpp:
        (WebCore::CachedImage::ref):
        (WebCore::CachedImage::imageSize):
        (WebCore::CachedImage::imageRect):
        * loader/CachedImage.h:
        (WebCore::CachedImage::canRender):
        Force access to the CachedImage metrics to take a multiplier so that people have to think about
        the zoom factor.  The "intrinsic size" of the image then takes that into account.

        * loader/ImageDocument.cpp:
        (WebCore::ImageTokenizer::finish):
        (WebCore::ImageDocument::scale):
        (WebCore::ImageDocument::resizeImageToFit):
        (WebCore::ImageDocument::imageChanged):
        (WebCore::ImageDocument::restoreImageSize):
        (WebCore::ImageDocument::imageFitsInWindow):
        Make sure image documents respect the zoom.

        * page/AnimationController.cpp:
        (WebCore::ImplicitAnimation::animate):
        Make the 'zoom' CSS property work with CSS transitions.

        * page/Frame.h:
        (WebCore::Frame::pageZoomFactor):
        (WebCore::Frame::textZoomFactor):
        Add accessors for obtaining the pageZoom vs. textZoom.

        * page/FrameView.cpp:
        (WebCore::FrameView::adjustViewSize):
        Remove the old zoom implementation that used transforms.

        * page/mac/WebCoreAXObject.mm:
        (-[WebCoreAXObject accessibilityIsIgnored]):
        Pass in the zoom factor.

        * rendering/InlineFlowBox.cpp:
        (WebCore::InlineFlowBox::paintBackground):
        (WebCore::InlineFlowBox::paintBoxDecorations):
        Pass in the zoom factor when testing for size.

        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::calculateBackgroundSize):
        (WebCore::RenderBox::imageChanged):
        (WebCore::RenderBox::paintBackgroundExtended):
        (WebCore::RenderBox::calcHeight):
        * rendering/RenderFrameSet.cpp:
        (WebCore::RenderFrameSet::layout):
        * rendering/RenderHTMLCanvas.cpp:
        (WebCore::RenderHTMLCanvas::canvasSizeChanged):
        * rendering/RenderHTMLCanvas.h:
        (WebCore::RenderHTMLCanvas::renderName):
        (WebCore::RenderHTMLCanvas::intrinsicSizeChanged):
        * rendering/RenderImage.cpp:
        (WebCore::RenderImage::setImageSizeForAltText):
        (WebCore::RenderImage::imageChanged):
        (WebCore::RenderImage::calcReplacedWidth):
        (WebCore::RenderImage::calcReplacedHeight):
        * rendering/RenderImage.h:
        (WebCore::RenderImage::intrinsicSizeChanged):
        * rendering/RenderListMarker.cpp:
        (WebCore::RenderListMarker::layout):
        (WebCore::RenderListMarker::imageChanged):
        (WebCore::RenderListMarker::getRelativeMarkerRect):
        * rendering/RenderObject.cpp:
        (WebCore::RenderObject::mustRepaintBackgroundOrBorder):
        (WebCore::RenderObject::paintBorder):
        Pass in the zoom factor when testing for size.

        * rendering/RenderReplaced.cpp:
        (WebCore::RenderReplaced::RenderReplaced):
        (WebCore::RenderReplaced::setStyle):
        (WebCore::RenderReplaced::intrinsicSizeChanged):
        * rendering/RenderReplaced.h:
        Added a new call when the zoom factor changes, intrinsicSizeChanged().  Replaced element subclasses
        respond to this via overrides.

        * rendering/RenderStyle.cpp:
        (WebCore::StyleVisualData::StyleVisualData):
        (WebCore::StyleInheritedData::StyleInheritedData):
        (WebCore::StyleInheritedData::operator==):
        (WebCore::RenderStyle::diff):
        * rendering/RenderStyle.h:
        (WebCore::StyleVisualData::operator==):
        (WebCore::RenderStyle::zoom):
        (WebCore::RenderStyle::zoomInEffect):
        (WebCore::RenderStyle::setZoom):
        (WebCore::RenderStyle::setZoomInEffect):
        (WebCore::RenderStyle::initialZoom):
        Support for 'zoom' in the RenderStyle.  "zoomInEffect" represents the computed zoom taking into account
        all the zooms specified on ancestors.

        * rendering/RenderTableCol.cpp:
        (WebCore::RenderTableCol::imageChanged):
        * rendering/RenderTableRow.cpp:
        (WebCore::RenderTableRow::imageChanged):
        * rendering/RenderTableSection.cpp:
        (WebCore::RenderTableSection::imageChanged):
        * rendering/RenderVideo.h:
        (WebCore::RenderVideo::intrinsicSizeChanged):
        Pass in the zoom factor.

        * rendering/RenderView.cpp:
        (WebCore::RenderView::calcHeight):
        (WebCore::RenderView::calcWidth):
        (WebCore::RenderView::layout):
        (WebCore::RenderView::viewHeight):
        (WebCore::RenderView::viewWidth):
        * rendering/RenderView.h:
        (WebCore::RenderView::zoomFactor):
        Back out the old implementation.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31155 268f45cc-cd09-0410-ab3c-d52691b4dbfc