JUCE/modules/juce_gui_basics/positioning/juce_RelativePointPath.cpp

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

RelativePointPath::RelativePointPath()
    : usesNonZeroWinding (true),
      containsDynamicPoints (false)
{
}

RelativePointPath::RelativePointPath (const RelativePointPath& other)
    : usesNonZeroWinding (true),
      containsDynamicPoints (false)
{
    for (int i = 0; i < other.elements.size(); ++i)
        elements.add (other.elements.getUnchecked(i)->clone());
}

RelativePointPath::RelativePointPath (const Path& path)
    : usesNonZeroWinding (path.isUsingNonZeroWinding()),
      containsDynamicPoints (false)
{
    for (Path::Iterator i (path); i.next();)
    {
        switch (i.elementType)
        {
            case Path::Iterator::startNewSubPath:   elements.add (new StartSubPath (RelativePoint (i.x1, i.y1))); break;
            case Path::Iterator::lineTo:            elements.add (new LineTo (RelativePoint (i.x1, i.y1))); break;
            case Path::Iterator::quadraticTo:       elements.add (new QuadraticTo (RelativePoint (i.x1, i.y1), RelativePoint (i.x2, i.y2))); break;
            case Path::Iterator::cubicTo:           elements.add (new CubicTo (RelativePoint (i.x1, i.y1), RelativePoint (i.x2, i.y2), RelativePoint (i.x3, i.y3))); break;
            case Path::Iterator::closePath:         elements.add (new CloseSubPath()); break;
            default:                                jassertfalse; break;
        }
    }
}

RelativePointPath::~RelativePointPath()
{
}

bool RelativePointPath::operator== (const RelativePointPath& other) const noexcept
{
    if (elements.size() != other.elements.size()
         || usesNonZeroWinding != other.usesNonZeroWinding
         || containsDynamicPoints != other.containsDynamicPoints)
        return false;

    for (int i = 0; i < elements.size(); ++i)
    {
        ElementBase* const e1 = elements.getUnchecked(i);
        ElementBase* const e2 = other.elements.getUnchecked(i);

        if (e1->type != e2->type)
            return false;

        int numPoints1, numPoints2;
        const RelativePoint* const points1 = e1->getControlPoints (numPoints1);
        const RelativePoint* const points2 = e2->getControlPoints (numPoints2);

        jassert (numPoints1 == numPoints2);

        for (int j = numPoints1; --j >= 0;)
            if (points1[j] != points2[j])
                return false;
    }

    return true;
}

bool RelativePointPath::operator!= (const RelativePointPath& other) const noexcept
{
    return ! operator== (other);
}

void RelativePointPath::swapWith (RelativePointPath& other) noexcept
{
    elements.swapWith (other.elements);
    std::swap (usesNonZeroWinding, other.usesNonZeroWinding);
    std::swap (containsDynamicPoints, other.containsDynamicPoints);
}

void RelativePointPath::createPath (Path& path, Expression::Scope* scope) const
{
    for (int i = 0; i < elements.size(); ++i)
        elements.getUnchecked(i)->addToPath (path, scope);
}

bool RelativePointPath::containsAnyDynamicPoints() const
{
    return containsDynamicPoints;
}

void RelativePointPath::addElement (ElementBase* newElement)
{
    if (newElement != nullptr)
    {
        elements.add (newElement);
        containsDynamicPoints = containsDynamicPoints || newElement->isDynamic();
    }
}

//==============================================================================
RelativePointPath::ElementBase::ElementBase (const ElementType type_) : type (type_)
{
}

bool RelativePointPath::ElementBase::isDynamic()
{
    int numPoints;
    const RelativePoint* const points = getControlPoints (numPoints);

    for (int i = numPoints; --i >= 0;)
        if (points[i].isDynamic())
            return true;

    return false;
}

//==============================================================================
RelativePointPath::StartSubPath::StartSubPath (const RelativePoint& pos)
    : ElementBase (startSubPathElement), startPos (pos)
{
}

void RelativePointPath::StartSubPath::addToPath (Path& path, Expression::Scope* scope) const
{
    path.startNewSubPath (startPos.resolve (scope));
}

RelativePoint* RelativePointPath::StartSubPath::getControlPoints (int& numPoints)
{
    numPoints = 1;
    return &startPos;
}

RelativePointPath::ElementBase* RelativePointPath::StartSubPath::clone() const
{
    return new StartSubPath (startPos);
}

//==============================================================================
RelativePointPath::CloseSubPath::CloseSubPath()
    : ElementBase (closeSubPathElement)
{
}

void RelativePointPath::CloseSubPath::addToPath (Path& path, Expression::Scope*) const
{
    path.closeSubPath();
}

RelativePoint* RelativePointPath::CloseSubPath::getControlPoints (int& numPoints)
{
    numPoints = 0;
    return nullptr;
}

RelativePointPath::ElementBase* RelativePointPath::CloseSubPath::clone() const
{
    return new CloseSubPath();
}

//==============================================================================
RelativePointPath::LineTo::LineTo (const RelativePoint& endPoint_)
    : ElementBase (lineToElement), endPoint (endPoint_)
{
}

void RelativePointPath::LineTo::addToPath (Path& path, Expression::Scope* scope) const
{
    path.lineTo (endPoint.resolve (scope));
}

RelativePoint* RelativePointPath::LineTo::getControlPoints (int& numPoints)
{
    numPoints = 1;
    return &endPoint;
}

RelativePointPath::ElementBase* RelativePointPath::LineTo::clone() const
{
    return new LineTo (endPoint);
}

//==============================================================================
RelativePointPath::QuadraticTo::QuadraticTo (const RelativePoint& controlPoint, const RelativePoint& endPoint)
    : ElementBase (quadraticToElement)
{
    controlPoints[0] = controlPoint;
    controlPoints[1] = endPoint;
}

void RelativePointPath::QuadraticTo::addToPath (Path& path, Expression::Scope* scope) const
{
    path.quadraticTo (controlPoints[0].resolve (scope),
                      controlPoints[1].resolve (scope));
}

RelativePoint* RelativePointPath::QuadraticTo::getControlPoints (int& numPoints)
{
    numPoints = 2;
    return controlPoints;
}

RelativePointPath::ElementBase* RelativePointPath::QuadraticTo::clone() const
{
    return new QuadraticTo (controlPoints[0], controlPoints[1]);
}


//==============================================================================
RelativePointPath::CubicTo::CubicTo (const RelativePoint& controlPoint1, const RelativePoint& controlPoint2, const RelativePoint& endPoint)
    : ElementBase (cubicToElement)
{
    controlPoints[0] = controlPoint1;
    controlPoints[1] = controlPoint2;
    controlPoints[2] = endPoint;
}

void RelativePointPath::CubicTo::addToPath (Path& path, Expression::Scope* scope) const
{
    path.cubicTo (controlPoints[0].resolve (scope),
                  controlPoints[1].resolve (scope),
                  controlPoints[2].resolve (scope));
}

RelativePoint* RelativePointPath::CubicTo::getControlPoints (int& numPoints)
{
    numPoints = 3;
    return controlPoints;
}

RelativePointPath::ElementBase* RelativePointPath::CubicTo::clone() const
{
    return new CubicTo (controlPoints[0], controlPoints[1], controlPoints[2]);
}

} // namespace juce