juce_BorderSize.h

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 /*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   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 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-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
{
 
//==============================================================================
template <typename ValueType>
class BorderSize
{
    auto tie() const { return std::tie (top, left, bottom, right); }
 
public:
    //==============================================================================
    BorderSize() = default;
 
    BorderSize (ValueType topGap, ValueType leftGap, ValueType bottomGap, ValueType rightGap) noexcept
        : top (topGap), left (leftGap), bottom (bottomGap), right (rightGap)
    {
    }
 
    explicit BorderSize (ValueType allGaps) noexcept
        : top (allGaps), left (allGaps), bottom (allGaps), right (allGaps)
    {
    }
 
    //==============================================================================
    ValueType getTop() const noexcept                   { return top; }
 
    ValueType getLeft() const noexcept                  { return left; }
 
    ValueType getBottom() const noexcept                { return bottom; }
 
    ValueType getRight() const noexcept                 { return right; }
 
    ValueType getTopAndBottom() const noexcept          { return top + bottom; }
 
    ValueType getLeftAndRight() const noexcept          { return left + right; }
 
    bool isEmpty() const noexcept                       { return left + right + top + bottom == ValueType(); }
 
    //==============================================================================
    void setTop (ValueType newTopGap) noexcept          { top = newTopGap; }
 
    void setLeft (ValueType newLeftGap) noexcept        { left = newLeftGap; }
 
    void setBottom (ValueType newBottomGap) noexcept    { bottom = newBottomGap; }
 
    void setRight (ValueType newRightGap) noexcept      { right = newRightGap; }
 
    //==============================================================================
    Rectangle<ValueType> subtractedFrom (const Rectangle<ValueType>& original) const noexcept
    {
        return { original.getX() + left,
                 original.getY() + top,
                 original.getWidth() - (left + right),
                 original.getHeight() - (top + bottom) };
    }
 
    void subtractFrom (Rectangle<ValueType>& rectangle) const noexcept
    {
        rectangle = subtractedFrom (rectangle);
    }
 
    Rectangle<ValueType> addedTo (const Rectangle<ValueType>& original) const noexcept
    {
        return { original.getX() - left,
                 original.getY() - top,
                 original.getWidth() + (left + right),
                 original.getHeight() + (top + bottom) };
    }
 
    void addTo (Rectangle<ValueType>& rectangle) const noexcept
    {
        rectangle = addedTo (rectangle);
    }
 
    BorderSize<ValueType> subtractedFrom (const BorderSize<ValueType>& other) const noexcept
    {
        return { other.top    - top,
                 other.left   - left,
                 other.bottom - bottom,
                 other.right  - right };
    }
 
    BorderSize<ValueType> addedTo (const BorderSize<ValueType>& other) const noexcept
    {
        return { other.top    + top,
                 other.left   + left,
                 other.bottom + bottom,
                 other.right  + right };
    }
 
    template <typename ScalarType>
    BorderSize<ValueType> multipliedBy (ScalarType scalar) const noexcept
    {
        return { static_cast<ValueType> (scalar * top),
                 static_cast<ValueType> (scalar * left),
                 static_cast<ValueType> (scalar * bottom),
                 static_cast<ValueType> (scalar * right) };
    }
 
    //==============================================================================
    bool operator== (const BorderSize& other) const noexcept { return tie() == other.tie(); }
    bool operator!= (const BorderSize& other) const noexcept { return tie() != other.tie(); }
 
private:
    //==============================================================================
    ValueType top{}, left{}, bottom{}, right{};
};
 
} // namespace juce