JUCE/modules/juce_gui_basics/positioning/juce_RelativeCoordinate.cpp

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

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

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

   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
{

const String RelativeCoordinate::Strings::parent ("parent");
const String RelativeCoordinate::Strings::left ("left");
const String RelativeCoordinate::Strings::right ("right");
const String RelativeCoordinate::Strings::top ("top");
const String RelativeCoordinate::Strings::bottom ("bottom");
const String RelativeCoordinate::Strings::x ("x");
const String RelativeCoordinate::Strings::y ("y");
const String RelativeCoordinate::Strings::width ("width");
const String RelativeCoordinate::Strings::height ("height");

RelativeCoordinate::StandardStrings::Type RelativeCoordinate::StandardStrings::getTypeOf (const String& s) noexcept
{
    if (s == Strings::left)    return left;
    if (s == Strings::right)   return right;
    if (s == Strings::top)     return top;
    if (s == Strings::bottom)  return bottom;
    if (s == Strings::x)       return x;
    if (s == Strings::y)       return y;
    if (s == Strings::width)   return width;
    if (s == Strings::height)  return height;
    if (s == Strings::parent)  return parent;
    return unknown;
}

//==============================================================================
RelativeCoordinate::RelativeCoordinate()
{
}

RelativeCoordinate::RelativeCoordinate (const Expression& term_)
    : term (term_)
{
}

RelativeCoordinate::RelativeCoordinate (const RelativeCoordinate& other)
    : term (other.term)
{
}

RelativeCoordinate& RelativeCoordinate::operator= (const RelativeCoordinate& other)
{
    term = other.term;
    return *this;
}

RelativeCoordinate::RelativeCoordinate (RelativeCoordinate&& other) noexcept
    : term (static_cast<Expression&&> (other.term))
{
}

RelativeCoordinate& RelativeCoordinate::operator= (RelativeCoordinate&& other) noexcept
{
    term = static_cast<Expression&&> (other.term);
    return *this;
}

RelativeCoordinate::RelativeCoordinate (const double absoluteDistanceFromOrigin)
    : term (absoluteDistanceFromOrigin)
{
}

RelativeCoordinate::RelativeCoordinate (const String& s)
{
    String error;
    term = Expression (s, error);
}

RelativeCoordinate::~RelativeCoordinate()
{
}

bool RelativeCoordinate::operator== (const RelativeCoordinate& other) const noexcept
{
    return term.toString() == other.term.toString();
}

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

double RelativeCoordinate::resolve (const Expression::Scope* scope) const
{
    if (scope != nullptr)
        return term.evaluate (*scope);

    return term.evaluate();
}

bool RelativeCoordinate::isRecursive (const Expression::Scope* scope) const
{
    String error;

    if (scope != nullptr)
        term.evaluate (*scope, error);
    else
        term.evaluate (Expression::Scope(), error);

    return error.isNotEmpty();
}

void RelativeCoordinate::moveToAbsolute (double newPos, const Expression::Scope* scope)
{
    if (scope != nullptr)
    {
        term = term.adjustedToGiveNewResult (newPos, *scope);
    }
    else
    {
        Expression::Scope defaultScope;
        term = term.adjustedToGiveNewResult (newPos, defaultScope);
    }
}

bool RelativeCoordinate::isDynamic() const
{
    return term.usesAnySymbols();
}

String RelativeCoordinate::toString() const
{
    return term.toString();
}

} // namespace juce