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/*
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_LENGTH_CONTEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_LENGTH_CONTEXT_H_
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/core/svg/svg_unit_types.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/length.h"
namespace blink {
class ComputedStyle;
class SVGElement;
class SVGLength;
class UnzoomedLength;
enum class SVGLengthMode { kWidth, kHeight, kOther };
class SVGLengthContext {
STACK_ALLOCATED();
public:
explicit SVGLengthContext(const SVGElement*);
template <typename T>
static FloatRect ResolveRectangle(const T* context,
SVGUnitTypes::SVGUnitType type,
const FloatRect& viewport) {
return ResolveRectangle(
context, type, viewport, *context->x()->CurrentValue(),
*context->y()->CurrentValue(), *context->width()->CurrentValue(),
*context->height()->CurrentValue());
}
static FloatRect ResolveRectangle(const SVGElement*,
SVGUnitTypes::SVGUnitType,
const FloatRect& viewport,
const SVGLength& x,
const SVGLength& y,
const SVGLength& width,
const SVGLength& height);
static FloatPoint ResolvePoint(const SVGElement*,
SVGUnitTypes::SVGUnitType,
const SVGLength& x,
const SVGLength& y);
static float ResolveLength(const SVGElement*,
SVGUnitTypes::SVGUnitType,
const SVGLength&);
FloatPoint ResolveLengthPair(const Length& x_length,
const Length& y_length,
const ComputedStyle&) const;
float ConvertValueToUserUnits(float,
SVGLengthMode,
CSSPrimitiveValue::UnitType from_unit) const;
float ConvertValueFromUserUnits(float,
SVGLengthMode,
CSSPrimitiveValue::UnitType to_unit) const;
float ValueForLength(const UnzoomedLength&,
SVGLengthMode = SVGLengthMode::kOther) const;
float ValueForLength(const Length&,
const ComputedStyle&,
SVGLengthMode = SVGLengthMode::kOther) const;
static float ValueForLength(const Length&,
const ComputedStyle&,
float dimension);
bool DetermineViewport(FloatSize&) const;
float ResolveValue(const CSSPrimitiveValue&, SVGLengthMode) const;
private:
float ValueForLength(const Length&, float zoom, SVGLengthMode) const;
static float ValueForLength(const Length&, float zoom, float dimension);
float ConvertValueFromUserUnitsToEXS(float value) const;
float ConvertValueFromEXSToUserUnits(float value) const;
float ConvertValueFromUserUnitsToCHS(float value) const;
float ConvertValueFromCHSToUserUnits(float value) const;
Member<const SVGElement> context_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_LENGTH_CONTEXT_H_
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