Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 495 insertions, 0 deletions

diff --git a/ksvg/impl/SVGPathSegArcImpl.cc b/ksvg/impl/SVGPathSegArcImpl.cc
new file mode 100644
index 00000000..9fb4190f
--- /dev/null
+++ b/ksvg/impl/SVGPathSegArcImpl.cc
@@ -0,0 +1,495 @@
+/*
+    Copyright (C) 2001-2003 KSVG Team
+    This file is part of the KDE project
+
+    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.
+*/
+
+#include <math.h>
+
+#include <kdebug.h>
+
+#include "SVGPathSegArcImpl.h"
+#include "SVGAngleImpl.h"
+
+using namespace KSVG;
+
+#include "SVGPathSegArcImpl.lut.h"
+#include "ksvg_scriptinterpreter.h"
+#include "ksvg_bridge.h"
+
+static void getArcSlopes(bool relative, double curx, double cury, double angle, double x, double y, double r1, double r2, bool largeArcFlag, bool sweepFlag, double *pStartSlope, double *pEndSlope)
+{
+	double sin_th, cos_th;
+	double a00, a01, a10, a11;
+	double x0, y0, x1, y1, xc, yc;
+	double d, sfactor, sfactor_sq;
+	double th0, th1, th_arc;
+	int i, n_segs;
+
+	sin_th = sin(angle * (M_PI / 180.0));
+	cos_th = cos(angle * (M_PI / 180.0));
+
+	double dx;
+
+	if(!relative)
+		dx = (curx - x) / 2.0;
+	else
+		dx = -x / 2.0;
+
+	double dy;
+		
+	if(!relative)
+		dy = (cury - y) / 2.0;
+	else
+		dy = -y / 2.0;
+		
+	double _x1 =  cos_th * dx + sin_th * dy;
+	double _y1 = -sin_th * dx + cos_th * dy;
+	double Pr1 = r1 * r1;
+	double Pr2 = r2 * r2;
+	double Px = _x1 * _x1;
+	double Py = _y1 * _y1;
+
+	// Spec : check if radii are large enough
+	double check = Px / Pr1 + Py / Pr2;
+	if(check > 1)
+	{
+		r1 = r1 * sqrt(check);
+		r2 = r2 * sqrt(check);
+	}
+
+	a00 = cos_th / r1;
+	a01 = sin_th / r1;
+	a10 = -sin_th / r2;
+	a11 = cos_th / r2;
+
+	x0 = a00 * curx + a01 * cury;
+	y0 = a10 * curx + a11 * cury;
+
+	if(!relative)
+		x1 = a00 * x + a01 * y;
+	else
+		x1 = a00 * (curx + x) + a01 * (cury + y);
+		
+	if(!relative)
+		y1 = a10 * x + a11 * y;
+	else
+		y1 = a10 * (curx + x) + a11 * (cury + y);
+
+	/* (x0, y0) is current point in transformed coordinate space.
+	   (x1, y1) is new point in transformed coordinate space.
+
+	   The arc fits a unit-radius circle in this space.
+     */
+
+	d = (x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0);
+
+	sfactor_sq = 1.0 / d - 0.25;
+
+	if(sfactor_sq < 0)
+		sfactor_sq = 0;
+
+	sfactor = sqrt(sfactor_sq);
+
+	if(sweepFlag == largeArcFlag)
+		sfactor = -sfactor;
+
+	xc = 0.5 * (x0 + x1) - sfactor * (y1 - y0);
+	yc = 0.5 * (y0 + y1) + sfactor * (x1 - x0);
+
+	/* (xc, yc) is center of the circle. */
+	th0 = atan2(y0 - yc, x0 - xc);
+	th1 = atan2(y1 - yc, x1 - xc);
+
+	th_arc = th1 - th0;
+	if(th_arc < 0 && sweepFlag)
+		th_arc += 2 * M_PI;
+	else if(th_arc > 0 && !sweepFlag)
+		th_arc -= 2 * M_PI;
+
+	n_segs = (int) (int) ceil(fabs(th_arc / (M_PI * 0.5 + 0.001)));
+
+	for(int step = 0; step < 2; step++)
+	{
+		i = step == 0 ? 0 : n_segs - 1;
+
+		double sin_th, cos_th;
+		double a00, a01, a10, a11;
+		double x1, y1, x2, y2, x3, y3;
+		double t;
+		double th_half;
+
+		double _th0 = th0 + i * th_arc / n_segs;
+		double _th1 = th0 + (i + 1) * th_arc / n_segs;
+
+		sin_th = sin(angle * (M_PI / 180.0));
+		cos_th = cos(angle * (M_PI / 180.0));
+
+		/* inverse transform compared with rsvg_path_arc */
+		a00 = cos_th * r1;
+		a01 = -sin_th * r2;
+		a10 = sin_th * r1;
+		a11 = cos_th * r2;
+
+		th_half = 0.5 * (_th1 - _th0);
+		t = (8.0 / 3.0) * sin(th_half * 0.5) * sin(th_half * 0.5) / sin(th_half);
+		x1 = xc + cos(_th0) - t * sin(_th0);
+		y1 = yc + sin(_th0) + t * cos(_th0);
+		x3 = xc + cos(_th1);
+		y3 = yc + sin(_th1);
+		x2 = x3 + t * sin(_th1);
+		y2 = y3 - t * cos(_th1);
+
+		double bezX1 = a00 * x1 + a01 * y1;
+		double bezY1 = a10 * x1 + a11 * y1;
+		double bezX2 = a00 * x2 + a01 * y2;
+		double bezY2 = a10 * x2 + a11 * y2;
+		double bezX = a00 * x3 + a01 * y3;
+		double bezY = a10 * x3 + a11 * y3;
+
+		if(step == 0)
+			*pStartSlope = SVGAngleImpl::todeg(atan2(bezY1 - cury, bezX1 - curx));
+		else
+			*pEndSlope = SVGAngleImpl::todeg(atan2(bezY - bezY2, bezX - bezX2));
+	}
+}
+
+SVGPathSegArcAbsImpl::SVGPathSegArcAbsImpl() : SVGPathSegImpl()
+{
+	KSVG_EMPTY_FLAGS
+}
+
+SVGPathSegArcAbsImpl::~SVGPathSegArcAbsImpl()
+{
+}
+
+void SVGPathSegArcAbsImpl::setX(double x)
+{
+	m_x = x;
+}
+
+double SVGPathSegArcAbsImpl::x() const
+{
+	return m_x;
+}
+
+void SVGPathSegArcAbsImpl::setY(double y)
+{
+	m_y = y;
+}
+
+double SVGPathSegArcAbsImpl::y() const
+{
+	return m_y;
+}
+
+void SVGPathSegArcAbsImpl::setR1(double r1)
+{
+	m_r1 = r1;
+}
+
+double SVGPathSegArcAbsImpl::r1() const
+{
+	return m_r1;
+}
+
+void SVGPathSegArcAbsImpl::setR2(double r2)
+{
+	m_r2 = r2;
+}
+
+double SVGPathSegArcAbsImpl::r2() const
+{
+	return m_r2;
+}
+
+void SVGPathSegArcAbsImpl::setAngle(double angle)
+{
+	m_angle = angle;
+}
+
+double SVGPathSegArcAbsImpl::angle() const
+{
+	return m_angle;
+}
+
+void SVGPathSegArcAbsImpl::setLargeArcFlag(bool largeArcFlag)
+{
+	m_largeArcFlag = largeArcFlag;
+}
+
+bool SVGPathSegArcAbsImpl::largeArcFlag() const
+{
+	return m_largeArcFlag;
+}
+
+void SVGPathSegArcAbsImpl::setSweepFlag(bool sweepFlag)
+{
+	m_sweepFlag = sweepFlag;
+}
+
+bool SVGPathSegArcAbsImpl::sweepFlag() const
+{
+	return m_sweepFlag;
+}
+
+void SVGPathSegArcAbsImpl::getDeltasAndSlopes(double curx, double cury, double *pDx, double *pDy, double *pStartSlope, double *pEndSlope) const
+{
+	double dx = x() - curx;
+	double dy = y() - cury;
+	double startSlope;
+	double endSlope;
+	getArcSlopes(false, curx, cury, angle(), x(), y(), r1(), r2(), largeArcFlag(), sweepFlag(), &startSlope, &endSlope);
+	*pDx = dx;
+	*pDy = dy;
+	*pStartSlope = startSlope;
+	*pEndSlope = endSlope;
+}
+
+// Ecma stuff
+
+/*
+@namespace KSVG
+@begin SVGPathSegArcAbsImpl::s_hashTable 11
+ x					SVGPathSegArcAbsImpl::X						DontDelete
+ y					SVGPathSegArcAbsImpl::Y						DontDelete
+ r1					SVGPathSegArcAbsImpl::R1					DontDelete
+ r2					SVGPathSegArcAbsImpl::R2					DontDelete
+ angle				SVGPathSegArcAbsImpl::Angle					DontDelete
+ largeArcFlag		SVGPathSegArcAbsImpl::LargeArcFlag			DontDelete
+ sweepFlag			SVGPathSegArcAbsImpl::SweepFlag				DontDelete
+@end
+*/
+
+Value SVGPathSegArcAbsImpl::getValueProperty(ExecState *, int token) const
+{
+    switch(token)
+    {
+        case X:
+			return Number(x());
+        case Y:
+			return Number(y());
+        case R1:
+			return Number(r1());
+        case R2:
+			return Number(r2());
+        case Angle:
+			return Number(angle());
+		case LargeArcFlag:
+			return Boolean(largeArcFlag());
+		case SweepFlag:
+			return Boolean(sweepFlag());
+		default:
+			kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+			return Undefined();
+	}
+}
+
+void SVGPathSegArcAbsImpl::putValueProperty(ExecState *exec, int token, const Value &value, int)
+{
+	switch(token)
+	{
+		case X:
+			m_x = value.toNumber(exec);
+			break;
+		case Y:
+			m_y = value.toNumber(exec);
+			break;
+		case R1:
+			m_r1 = value.toNumber(exec);
+			break;
+		case R2:
+			m_r2 = value.toNumber(exec);
+			break;
+		case Angle:
+			m_angle = value.toNumber(exec);
+			break;
+		case LargeArcFlag:
+			m_largeArcFlag = value.toBoolean(exec);
+			break;
+		case SweepFlag:
+			m_sweepFlag = value.toBoolean(exec);
+			break;
+		default:
+			kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+	}
+}
+
+
+
+SVGPathSegArcRelImpl::SVGPathSegArcRelImpl() : SVGPathSegImpl()
+{
+	KSVG_EMPTY_FLAGS
+}
+
+SVGPathSegArcRelImpl::~SVGPathSegArcRelImpl()
+{
+}
+
+void SVGPathSegArcRelImpl::setX(double x)
+{
+	m_x = x;
+}
+
+double SVGPathSegArcRelImpl::x() const
+{
+	return m_x;
+}
+
+void SVGPathSegArcRelImpl::setY(double y)
+{
+	m_y = y;
+}
+
+double SVGPathSegArcRelImpl::y() const
+{
+	return m_y;
+}
+
+void SVGPathSegArcRelImpl::setR1(double r1)
+{
+	m_r1 = r1;
+}
+
+double SVGPathSegArcRelImpl::r1() const
+{
+	return m_r1;
+}
+
+void SVGPathSegArcRelImpl::setR2(double r2)
+{
+	m_r2 = r2;
+}
+
+double SVGPathSegArcRelImpl::r2() const
+{
+	return m_r2;
+}
+
+void SVGPathSegArcRelImpl::setAngle(double angle)
+{
+	m_angle = angle;
+}
+
+double SVGPathSegArcRelImpl::angle() const
+{
+	return m_angle;
+}
+
+void SVGPathSegArcRelImpl::setLargeArcFlag(bool largeArcFlag)
+{
+	m_largeArcFlag = largeArcFlag;
+}
+
+bool SVGPathSegArcRelImpl::largeArcFlag() const
+{
+	return m_largeArcFlag;
+}
+
+void SVGPathSegArcRelImpl::setSweepFlag(bool sweepFlag)
+{
+	m_sweepFlag = sweepFlag;
+}
+
+bool SVGPathSegArcRelImpl::sweepFlag() const
+{
+	return m_sweepFlag;
+}
+
+void SVGPathSegArcRelImpl::getDeltasAndSlopes(double curx, double cury, double *pDx, double *pDy, double *pStartSlope, double *pEndSlope) const
+{
+	double dx = x();
+	double dy = y();
+	double startSlope;
+	double endSlope;
+	getArcSlopes(true, curx, cury, angle(), x(), y(), r1(), r2(), largeArcFlag(), sweepFlag(), &startSlope, &endSlope);
+	*pDx = dx;
+	*pDy = dy;
+	*pStartSlope = startSlope;
+	*pEndSlope = endSlope;
+}
+
+// Ecma stuff
+
+/*
+@namespace KSVG
+@begin SVGPathSegArcRelImpl::s_hashTable 11
+ x				SVGPathSegArcRelImpl::X						DontDelete
+ y				SVGPathSegArcRelImpl::Y						DontDelete
+ r1				SVGPathSegArcRelImpl::R1					DontDelete
+ r2				SVGPathSegArcRelImpl::R2					DontDelete
+ angle			SVGPathSegArcRelImpl::Angle					DontDelete
+ largeArcFlag	SVGPathSegArcRelImpl::LargeArcFlag			DontDelete
+ sweepFlag		SVGPathSegArcRelImpl::SweepFlag				DontDelete
+@end
+*/
+
+Value SVGPathSegArcRelImpl::getValueProperty(ExecState *, int token) const
+{
+    switch(token)
+    {
+        case X:
+			return Number(x());
+        case Y:
+			return Number(y());
+        case R1:
+			return Number(r1());
+        case R2:
+			return Number(r2());
+        case Angle:
+			return Number(angle());
+		case LargeArcFlag:
+			return Boolean(largeArcFlag());
+		case SweepFlag:
+			return Boolean(sweepFlag());
+		default:
+			kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+			return Undefined();
+	}
+}
+
+void SVGPathSegArcRelImpl::putValueProperty(ExecState *exec, int token, const Value &value, int)
+{
+	switch(token)
+	{
+		case X:
+			m_x = value.toNumber(exec);
+			break;
+		case Y:
+			m_y = value.toNumber(exec);
+			break;
+		case R1:
+			m_r1 = value.toNumber(exec);
+			break;
+		case R2:
+			m_r2 = value.toNumber(exec);
+			break;
+		case Angle:
+			m_angle = value.toNumber(exec);
+			break;
+		case LargeArcFlag:
+			m_largeArcFlag = value.toBoolean(exec);
+			break;
+		case SweepFlag:
+			m_sweepFlag = value.toBoolean(exec);
+			break;
+		default:
+			kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+	}
+}
+
+// vim:ts=4:noet