111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
/*
|
|
* Copyright (C) Research In Motion Limited 2010. 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "AffineTransform.h"
|
|
|
|
namespace WebCore {
|
|
|
|
// A SVGTextFragment describes a text fragment of a RenderSVGInlineText which can be rendered at once.
|
|
struct SVGTextFragment {
|
|
SVGTextFragment()
|
|
: characterOffset(0)
|
|
, metricsListOffset(0)
|
|
, length(0)
|
|
, isTextOnPath(false)
|
|
, x(0)
|
|
, y(0)
|
|
, width(0)
|
|
, height(0)
|
|
{
|
|
}
|
|
|
|
enum TransformType {
|
|
TransformRespectingTextLength,
|
|
TransformIgnoringTextLength
|
|
};
|
|
|
|
void buildFragmentTransform(AffineTransform& result, TransformType type = TransformRespectingTextLength) const
|
|
{
|
|
if (type == TransformIgnoringTextLength) {
|
|
result = transform;
|
|
transformAroundOrigin(result);
|
|
return;
|
|
}
|
|
|
|
if (isTextOnPath)
|
|
buildTransformForTextOnPath(result);
|
|
else
|
|
buildTransformForTextOnLine(result);
|
|
}
|
|
|
|
// The first rendered character starts at RenderSVGInlineText::characters() + characterOffset.
|
|
unsigned characterOffset;
|
|
unsigned metricsListOffset;
|
|
unsigned length : 31;
|
|
bool isTextOnPath : 1;
|
|
|
|
float x;
|
|
float y;
|
|
float width;
|
|
float height;
|
|
|
|
// Includes rotation/glyph-orientation-(horizontal|vertical) transforms, as well as orientation related shifts
|
|
// (see SVGTextLayoutEngine, which builds this transformation).
|
|
AffineTransform transform;
|
|
|
|
// Contains lengthAdjust related transformations, which are not allowd to influence the SVGTextQuery code.
|
|
AffineTransform lengthAdjustTransform;
|
|
|
|
private:
|
|
void transformAroundOrigin(AffineTransform& result) const
|
|
{
|
|
// Returns (translate(x, y) * result) * translate(-x, -y).
|
|
result.setE(result.e() + x);
|
|
result.setF(result.f() + y);
|
|
result.translate(-x, -y);
|
|
}
|
|
|
|
void buildTransformForTextOnPath(AffineTransform& result) const
|
|
{
|
|
// For text-on-path layout, multiply the transform with the lengthAdjustTransform before orienting the resulting transform.
|
|
result = lengthAdjustTransform.isIdentity() ? transform : transform * lengthAdjustTransform;
|
|
if (!result.isIdentity())
|
|
transformAroundOrigin(result);
|
|
}
|
|
|
|
void buildTransformForTextOnLine(AffineTransform& result) const
|
|
{
|
|
// For text-on-line layout, orient the transform first, then multiply the lengthAdjustTransform with the oriented transform.
|
|
if (transform.isIdentity()) {
|
|
result = lengthAdjustTransform;
|
|
return;
|
|
}
|
|
|
|
result = transform;
|
|
transformAroundOrigin(result);
|
|
|
|
if (!lengthAdjustTransform.isIdentity())
|
|
result = lengthAdjustTransform * result;
|
|
}
|
|
};
|
|
|
|
} // namespace WebCore
|