- make <canvas> element and related API behave more like the draft of
          the WhatWG Web Application specification, checking parameter validity
          and raising exceptions
        - changed HTMLCanvasElement bindings to be auto-generated, fixing all
          issues so we can generate bindings for classes drived from HTMLElement
        - change GraphicsContext API to use IntRect/Point/Size in more cases
        - change GraphicsContext so it is closer to truly wrapping a graphics
          context rather than representing the current NSGraphicsContext; there
          are still some things like text and rectangle fills that are tied to
          NSGraphicsContext, but we're most of the way there
        - removed Brush class since it just amounted to a color, using an RGBA32
          instead where we used to use a Brush

        * DerivedSources.make: Added JSHTMLCanvasElement.h.
        * WebCore.xcodeproj/project.pbxproj: Added new files.

        * bindings/js/JSCanvasRenderingContext2DBase.h: Added toJS.
        * bindings/js/JSCanvasRenderingContext2DBase.cpp:
        (WebCore::JSCanvasRenderingContext2DBaseProtoFunc::callAsFunction):
        Added exception code handling for strokeRect, drawImage, and createPattern.
        Added version of createPattern that takes a canvas. Use TYPE_MISMATCH_ERR
        instead of JavaScript TypeError when parameter is neither an image or canvas
        element. Adapt for new HTMLCanvasElement binding.
        (WebCore::toJS): Added. Converts context object to JS wrapper.

        * bindings/js/JSHTMLElementWrapperFactory.h: Added.
        * bindings/js/JSHTMLElementWrapperFactory.cpp: Added. Creates a JavaScript
        wrapper for an arbitrary HTML element. Better than putting this all in the
        DOM node class toJS function.

        * bindings/js/JSXMLSerializer.cpp: Tweaked to make it build.
        * bindings/js/kjs_dom.cpp: (KJS::toJS): Changed to call the
        JSHTMLElementWrapperFactory function createJSWrapper, instead
        of always creating a JSHTMLElement.

        * bindings/js/kjs_html.h: Removed canvas-related stuff. Added HTMLElement
        prototype.
        * bindings/js/kjs_html.cpp:
        (KJS::JSHTMLElement::classInfo): Removed canvas element.
        (KJS::JSHTMLElement::accessors): Ditto.
        (KJS::JSHTMLElementProtoFunc::callAsFunction): Added, to help the auto-binding
        machiner cope with HTMLElement.
        (KJS::HTMLElementFunction::callAsFunction): Removed canvas element.

        * bindings/scripts/CodeGeneratorJS.pm: Added types needed for HTMLCanvasElement.

        * bridge/mac/FrameMac.mm: (WebCore::FrameMac::setDisplaysWithFocusAttributes):
        Changed to create a GraphicsContext with the new constructor that takes
        a CGContextRef.
        * bridge/mac/WebCoreFrameBridge.mm: (-[WebCoreFrameBridge drawRect:]):
        Changed to create a GraphicsContext with the new constructor that takes
        a NSGraphicsContext.
        * page/Frame.cpp: (WebCore::Frame::adjustPageHeight): Changed to create a
        GraphicsContext with the new constructor that takes a CGContextRef.

        * editing/SelectionController.cpp: (WebCore::SelectionController::paintCaret):
        Eliminated a use of obsolete class Brush.

        * html/CanvasPattern.h:
        * html/CanvasPattern.cpp:
        (WebCore::CanvasPattern::parseRepetitionType): Added. Parses a repetition
        type. Different from the old logic in that it is case-sensitive and rejects
        anything other than null, empty string, or the four repeat types.
        (WebCore::CanvasPattern::CanvasPattern): Added constructor that takes
        a CGImageRef. Changed constructor to take two booleans instead of the repetition
        type string. It's the caller's responsibility to parse the string.
        (WebCore::CanvasPattern::~CanvasPattern): Release the CGImage.
        (WebCore::patternCallback): Handle the CGImage case. Also changed the code
        to create a GraphicsContext as needed and call the image drawing code with that.
        (WebCore::CanvasPattern::createPattern): Handle both the image element case and
        the canvas element case.
        
        * html/CanvasRenderingContext2D.h:
        * html/CanvasRenderingContext2D.cpp:
        (WebCore::CanvasRenderingContext2D::State::State): Change line cap, line join,
        and global composite to store enum values instead of strings.
        (WebCore::CanvasRenderingContext2D::setLineWidth): Do nothing if width is NaN
        or <= 0.
        (WebCore::CanvasRenderingContext2D::lineCap): Return a string based on a
        stored enum, rather than returning a stored string.
        (WebCore::CanvasRenderingContext2D::setLineCap): Do nothing if the string is
        not one of the standard line cap types. Also case sensitive and stores enum
        rather than the string.
        (WebCore::CanvasRenderingContext2D::lineJoin): Return a string based on a
        stored enum, rather than returning a stored string.
        (WebCore::CanvasRenderingContext2D::setLineJoin): Do nothing if the string is
        not one of the standard line join types. Also case sensitive and stores enum
        rather than the string.
        (WebCore::CanvasRenderingContext2D::setMiterLimit): Do nothing if limit is NaN
        or <= 0.
        (WebCore::CanvasRenderingContext2D::setGlobalAlpha): Do nothing if alpha is NaN
        or < 0 or > 1.
        (WebCore::CanvasRenderingContext2D::globalCompositeOperation): Return a string
        based on a stored enum, rather than returning a stored string.
        (WebCore::CanvasRenderingContext2D::setGlobalCompositeOperation): Do nothing if
        the string is not one of the standard compositing modes. Also case sensitive and
        stores enum rather than the string.
        (WebCore::CanvasRenderingContext2D::arcTo): Generate INDEX_SIZE_ERR exception
        if radius is NaN or <= 0.
        (WebCore::CanvasRenderingContext2D::arc): Ditto.
        (WebCore::CanvasRenderingContext2D::rect): Generate INDEX_SIZE_ERR exception
        if width or height is NaN or <= 0.
        (WebCore::CanvasRenderingContext2D::clearRect): Ditto.
        (WebCore::CanvasRenderingContext2D::fillRect): Ditto.
        (WebCore::CanvasRenderingContext2D::strokeRect): Ditto, same for line width.
        Changed the case where the line width is not specified to share code with the
        case where it is.
        (WebCore::size): Renamed from imageSize, since C++ overloads based on parameter
        types anyway.
        (WebCore::CanvasRenderingContext2D::drawImage): Generate INDEX_SIZE_ERR exception
        if the source rect is not entirely inside the image rect, or if the width or height
        of either the source or destination rect is NaN or <= 0. Changed image drawing
        code to be platform-independent for the image element case, but not yet for the
        canvas case.
        (WebCore::CanvasRenderingContext2D::drawImageFromRect): Change code to parse the
        composite operation to use the new code shared with Image.
        (WebCore::CanvasRenderingContext2D::createPattern): Added code to parse the
        repetition type separately before creating the pattern. Added an overload for
        canvas elements.
        (WebCore::CanvasRenderingContext2D::drawingContext): Changed to return a
        GraphicsContext*.
        (WebCore::CanvasRenderingContext2D::platformContext): Added. Now does what
        drawingContext used to do.

        * html/CanvasRenderingContext2D.idl: Added exception declarations as needed
        for changes above.

        * html/HTMLCanvasElement.h:
        * html/HTMLCanvasElement.cpp:
        (WebCore::HTMLCanvasElement::HTMLCanvasElement): Changed m_drawingContext
        to be a GraphicsContext instead of a CGContextRef.
        (WebCore::HTMLCanvasElement::~HTMLCanvasElement): Ditto.
        (WebCore::HTMLCanvasElement::getContext): Removed special cases for null
        and empty string. Only give a 2D graphics context if the string is "2d".
        (WebCore::HTMLCanvasElement::reset): Updated for change to GraphicsContext
        from CGContextRef.
        (WebCore::HTMLCanvasElement::paint): Ditto.
        (WebCore::HTMLCanvasElement::createDrawingContext): Changed to create a
        GraphicsContext* instead of a CGContextRef.
        (WebCore::HTMLCanvasElement::drawingContext): Changed to return a
        GraphicsContext* instead of a CGContextRef.
        (WebCore::HTMLCanvasElement::createPlatformImage): Updated for changes above.

        * html/HTMLCanvasElement.idl: Added.

        * html/HTMLParser.h:
        * html/HTMLParser.cpp:
        (WebCore::HTMLParser::canvasCreateErrorCheck): Added. An attempt to implement the
        fallback behavior for canvas elements when JavaScript is off.
        (WebCore::HTMLParser::getNode): Sorted list of functions. Added case for canvas.

        * html/html_imageimpl.h:
        * html/html_imageimpl.cpp:
        (WebCore::HTMLImageElement::HTMLImageElement): Changed m_compositeOperator to be
        an enum instead of a string.
        (WebCore::HTMLImageElement::parseMappedAttribute): Parse the enum here.

        * kcanvas/KCanvasResources.h:
        * kcanvas/KCanvasResources.cpp: (WebCore::KCanvasMarker::draw): Changed to take a
        GraphicsContext parameter.

        * kcanvas/RenderPath.h: Added GraphicsContext parameter to drawMarkersIfNeeded.

        * kcanvas/RenderPath.cpp: (WebCore::RenderPath::paint):
        * kcanvas/RenderSVGImage.cpp: (WebCore::RenderSVGImage::paint):
        * kcanvas/RenderSVGText.cpp: (WebCore::RenderSVGText::paint):
        Changed to generate and use an appropriate GraphicsContext.

        * kcanvas/device/quartz/KCanvasItemQuartz.h: Added GraphicsContext parameter to
        drawMarkersIfNeeded.
        * kcanvas/device/quartz/KCanvasItemQuartz.mm:
        (WebCore::DrawMarkersData::DrawMarkersData): Added GraphicsContext*.
        (WebCore::drawMarkerWithData): Pass along a GraphicsContext*.
        (WebCore::drawStartAndMidMarkers): Ditto.
        (WebCore::KCanvasItemQuartz::drawMarkersIfNeeded): Pass a long a GraphicsContext*.

        * kcanvas/device/KRenderingDevice.h: Added a pure virtual createGraphicsContext
        to bridge back to a GraphicsContext. Long term that class will replace this one.
        * kcanvas/device/quartz/KRenderingDeviceQuartz.h:
        * kcanvas/device/quartz/KRenderingDeviceQuartz.mm:
        (WebCore::KRenderingDeviceContextQuartz::createGraphicsContext): Added.

        * ksvg2/svg/SVGMaskElement.cpp: (WebCore::SVGMaskElement::drawMaskerContent):
        Create and pass a GraphicsContext -- old code used the default constructor for
        GraphicsContext which meant "current context", and that no longer exists.
        * ksvg2/svg/SVGPatternElement.cpp:
        (WebCore::SVGPatternElement::drawPatternContentIntoTile): Ditto.

        * platform/Brush.h: Removed.
        * platform/CompositeOperator.h: Added.
        * platform/CompositeOperator.cpp: Added.

        * platform/Font.h: Changed calls to use IntPoint instead of pairs of ints.
        Also removed the const from all the uses of GraphicsContext*.

        * platform/GraphicsContext.h: Eliminated default constructor and constructor
        that takes only a boolean. Replaced with constructors that take platform
        graphics contexts only. Replaced brush-related calls with fill color calls.
        Replaced use of Brush with use of Color. Changed Image::CompositeOperator to
        just plain CompositeOperator. Changed tuples of ints into IntRect and IntPoint.
        Moved setFocusRingClip and clearFocusRingClip out of ifdefs. Removed unused
        getCompositeOperation and string-based setCompositeOperation. Moved
        currentCGContext and the other setCompositeOperation out of the GraphicsContext
        class and made them global functions. Fixed platformContext so it won't always
        return the CGContextRef of the current NSGraphicsContext. Instead, it will
        return the appropriate CGContextRef for the GraphicsContext. This eliminates
        the need to use void* for the image-drawing functions.

        * platform/GraphicsContext.cpp:
        (WebCore::GraphicsContextState::GraphicsContextState): Replaced Brush with
        an RGBA fill color.
        (WebCore::GraphicsContext::setFillColor): Renamed from setBrush.
        (WebCore::GraphicsContext::fillColor): Renamed from brush.
        (WebCore::GraphicsContext::drawImage): Changed to use IntRect.
        (WebCore::GraphicsContext::drawTiledImage): Moved here from GraphicsContextMac.mm.
        (WebCore::GraphicsContext::drawText): Changed to use IntPoint.
        (WebCore::GraphicsContext::drawHighlightForText): Ditto.
        (WebCore::GraphicsContext::drawLineForText): Ditto.
        (WebCore::GraphicsContext::drawLineForMisspelling): Ditto.

        * platform/Image.h: Removed CompositeOperator and related functions.
        Removed void* context parameters from draw functions.

        * platform/Image.cpp: Removed compositeOperatorFromString.

        * platform/Widget.h: Added a GraphicsContext* return value from lockDrawingFocus
        that you pass back to unlockDrawingFocus (for deletion).

        * platform/mac/FontMac.mm:
        (WebCore::Font::selectionRectForText): Changed parameter to point and removed
        const on GraphicsContext* parameter.
        (WebCore::Font::drawText): Ditto.
        (WebCore::Font::drawHighlightForText): Ditto.
        (WebCore::Font::drawLineForText): Ditto.
        (WebCore::Font::drawLineForMisspelling): Ditto.
        (WebCore::Font::misspellingLineThickness): Removed const.

        * platform/mac/GraphicsContextMac.mm:
        (WebCore::GraphicsContextPlatformPrivate::GraphicsContextPlatformPrivate):
        Added fields to store a CGContextRef and an NSGraphicsContext.
        (WebCore::GraphicsContextPlatformPrivate::~GraphicsContextPlatformPrivate):
        Release both the CGContextRef and the NSGraphicsContext.
        (WebCore::GraphicsContext::GraphicsContext): Implement to set up both the
        CGContextRef and the NSGraphicsContext in one case, and only the CGContextRef
        in the other.
        (WebCore::GraphicsContext::savePlatformState): Implement for the CGContext-only
        case.
        (WebCore::GraphicsContext::restorePlatformState): Ditto.
        (WebCore::GraphicsContext::drawRect): Assert that the NS context is present
        and 
        (WebCore::GraphicsContext::setColorFromFillColor): Renamed from
        setColorFromBrush.
        (WebCore::GraphicsContext::setColorFromPen): Added assertion.
        (WebCore::GraphicsContext::drawLine): Added assertion.
        (WebCore::GraphicsContext::drawEllipse): Get CGContext from the platformContext
        function instead of currentCGContext, and changed to use fillColor.
        (WebCore::GraphicsContext::drawArc): Ditto.
        (WebCore::GraphicsContext::drawConvexPolygon): Ditto.
        (WebCore::setCompositeOperation): Changed to global function and also changed
        to do the work here -- no need to use WebCoreImageRendererFactory.
        (WebCore::GraphicsContext::drawImage): Move most of this into GraphicsContext.cpp.
        Remove the void* context parameter. Changed to take rects instead of separate coordinates.
        (WebCore::GraphicsContext::fillRect): Changed to take color instead of Brush.
        (WebCore::GraphicsContext::addClip): Added assertion.
        (WebCore::GraphicsContext::addRoundedRectClip): Get CGContextRef from the platformContext
        function instead of currentCGContext.
        (WebCore::GraphicsContext::createRenderingDeviceContext): Ditto.
        (WebCore::GraphicsContext::beginTransparencyLayer): Ditto.
        (WebCore::GraphicsContext::endTransparencyLayer): Ditto.
        (WebCore::GraphicsContext::setShadow): Change to take size instead of x,y. Also get
        CGCOntextRef from the platformContext function instead of currentCGContext.
        (WebCore::GraphicsContext::clearShadow): Get CGContextRef from the platformContext
        function instead of currentCGContext.
        (WebCore::GraphicsContext::platformContext): Added. Returns m_data->m_cgContext.

        * platform/mac/ImageMac.mm:
        (WebCore::fillSolidColorInRect): Updated for change in CompositeOperator type.
        (WebCore::Image::checkForSolidColor): Ditto.
        (WebCore::Image::draw): Removed void* context parameter and replaced it with
        a GraphicsContext* parameter. Renamed from drawInRect.
        (WebCore::Image::drawTiled): Ditto. Renamed from tileInRect and scaleAndTileInRect.

        * platform/mac/PDFDocumentImage.h: Updated for change in CompositeOperator type.
        * platform/mac/PDFDocumentImage.mm: (WebCore::PDFDocumentImage::draw): Ditto.

        * platform/mac/WidgetMac.mm:
        (WebCore::Widget::lockDrawingFocus): Changed to return a GraphicsContext*.
        (WebCore::Widget::unlockDrawingFocus): Changed to take a GraphicsContext*.

        * rendering/InlineTextBox.cpp:
        (WebCore::InlineTextBox::selectionRect): Changed to pass IntPoint.
        (WebCore::InlineTextBox::paint): Changed to pass IntSize.
        (WebCore::InlineTextBox::paintSelection): More of the same.
        (WebCore::InlineTextBox::paintMarkedTextBackground): Ditto.
        (WebCore::InlineTextBox::paintDecoration): Ditto.
        (WebCore::InlineTextBox::paintSpellingMarker): Ditto.
        (WebCore::InlineTextBox::paintTextMatchMarker): Ditto.
        (WebCore::InlineTextBox::paintMarkedTextUnderline): Ditto.
        (WebCore::InlineTextBox::positionForOffset): Ditto.
        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::fillHorizontalSelectionGap): Ditto.
        (WebCore::RenderBlock::fillVerticalSelectionGap): Ditto.
        (WebCore::RenderBlock::fillLeftSelectionGap): Ditto.
        (WebCore::RenderBlock::fillRightSelectionGap): Ditto.
        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::paintBackgroundExtended): Ditto.
        (WebCore::RenderBox::outlineBox): Ditto.
        * rendering/RenderImage.cpp:
        (WebCore::RenderImage::paint): Ditto.
        * rendering/RenderLayer.cpp:
        (WebCore::setClip): Take out ifdefs. We'll do that inside GraphicsContext instead.
        (WebCore::restoreClip): Ditto.
        * rendering/RenderObject.cpp:
        (WebCore::RenderObject::drawBorder): More of the same.
        (WebCore::RenderObject::paintBorderImage): Ditto.
        * rendering/render_line.cpp:
        (WebCore::InlineFlowBox::paintDecorations): Ditto.
        (WebCore::EllipsisBox::paint): Ditto.
        * rendering/render_list.cpp:
        (WebCore::RenderListMarker::paint): Ditto.

        * rendering/render_frames.cpp: (WebCore::RenderFrameSet::userResize): Set up a graphics
        context by calling lockDrawingFocus. Also changed a color here to be a constant.

        * platform/cairo/GraphicsContextCairo.cpp:
        (WebCore::GraphicsContext::drawImage): Update for parameter type changes.
        (WebCore::GraphicsContext::drawScaledAndTiledImage):
        (WebCore::GraphicsContext::setFocusRingClip):
        (WebCore::GraphicsContext::clearFocusRingClip):
        * platform/cairo/ImageCairo.cpp:
        (WebCore::setCompositingOperation):
        (WebCore::Image::tileInRect):
        (WebCore::Image::scaleAndTileInRect):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@13992 268f45cc-cd09-0410-ab3c-d52691b4dbfc