gecko-dev/layout/svg/nsSVGTextPathFrame.h

93 строки
2.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef NSSVGTEXTPATHFRAME_H
#define NSSVGTEXTPATHFRAME_H
#include "mozilla/Attributes.h"
#include "gfxTypes.h"
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsISVGChildFrame.h"
#include "nsLiteralString.h"
#include "nsQueryFrame.h"
#include "nsSVGTSpanFrame.h"
class gfxFlattenedPath;
class nsIAtom;
class nsIContent;
class nsIFrame;
class nsIPresShell;
class nsStyleContext;
namespace mozilla {
class SVGNumberList;
}
typedef nsSVGTSpanFrame nsSVGTextPathFrameBase;
class nsSVGTextPathFrame : public nsSVGTextPathFrameBase
{
typedef mozilla::SVGNumberList SVGNumberList;
friend nsIFrame*
NS_NewSVGTextPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
protected:
nsSVGTextPathFrame(nsStyleContext* aContext) : nsSVGTextPathFrameBase(aContext) {}
public:
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame:
#ifdef DEBUG
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
#endif
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) MOZ_OVERRIDE;
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::svgGFrame
*/
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
{
return MakeFrameName(NS_LITERAL_STRING("SVGTextPath"), aResult);
}
#endif
// nsSVGTextPathFrame methods:
already_AddRefed<gfxFlattenedPath> GetFlattenedPath();
nsIFrame *GetPathFrame();
/**
* Gets the scale by which offsets along this textPath must be scaled. This
* scaling is due to the user provided 'pathLength' attribute on the <path>
* element, which is a user provided estimate of the path length.
*/
gfxFloat GetOffsetScale();
/**
* Gets the offset from the start of the path at which the first character
* should be positioned. The value returned already takes GetOffsetScale
* into account.
*/
gfxFloat GetStartOffset();
protected:
virtual void GetXY(SVGUserUnitList *aX, SVGUserUnitList *aY) MOZ_OVERRIDE;
virtual void GetDxDy(SVGUserUnitList *aDx, SVGUserUnitList *aDy) MOZ_OVERRIDE;
virtual const SVGNumberList *GetRotate() MOZ_OVERRIDE;
};
#endif