fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).

modules/juce_gui_basics/layout/juce_StretchableObjectResizer.cpp

@@ -0,0 +1,123 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+StretchableObjectResizer::StretchableObjectResizer() {}
+StretchableObjectResizer::~StretchableObjectResizer() {}
+
+void StretchableObjectResizer::addItem (const double size,
+                                        const double minSize, const double maxSize,
+                                        const int order)
+{
+    // the order must be >= 0 but less than the maximum integer value.
+    jassert (order >= 0 && order < std::numeric_limits<int>::max());
+    jassert (maxSize >= minSize);
+
+    Item item;
+    item.size = size;
+    item.minSize = minSize;
+    item.maxSize = maxSize;
+    item.order = order;
+    items.add (item);
+}
+
+double StretchableObjectResizer::getItemSize (const int index) const noexcept
+{
+    return isPositiveAndBelow (index, items.size()) ? items.getReference (index).size
+                                                    : 0.0;
+}
+
+void StretchableObjectResizer::resizeToFit (const double targetSize)
+{
+    int order = 0;
+
+    for (;;)
+    {
+        double currentSize = 0;
+        double minSize = 0;
+        double maxSize = 0;
+
+        int nextHighestOrder = std::numeric_limits<int>::max();
+
+        for (int i = 0; i < items.size(); ++i)
+        {
+            const Item& it = items.getReference(i);
+            currentSize += it.size;
+
+            if (it.order <= order)
+            {
+                minSize += it.minSize;
+                maxSize += it.maxSize;
+            }
+            else
+            {
+                minSize += it.size;
+                maxSize += it.size;
+                nextHighestOrder = jmin (nextHighestOrder, it.order);
+            }
+        }
+
+        const double thisIterationTarget = jlimit (minSize, maxSize, targetSize);
+
+        if (thisIterationTarget >= currentSize)
+        {
+            const double availableExtraSpace = maxSize - currentSize;
+            const double targetAmountOfExtraSpace = thisIterationTarget - currentSize;
+            const double scale = availableExtraSpace > 0 ? targetAmountOfExtraSpace / availableExtraSpace : 1.0;
+
+            for (int i = 0; i < items.size(); ++i)
+            {
+                Item& it = items.getReference(i);
+
+                if (it.order <= order)
+                    it.size = jlimit (it.minSize, it.maxSize, it.size + (it.maxSize - it.size) * scale);
+            }
+        }
+        else
+        {
+            const double amountOfSlack = currentSize - minSize;
+            const double targetAmountOfSlack = thisIterationTarget - minSize;
+            const double scale = targetAmountOfSlack / amountOfSlack;
+
+            for (int i = 0; i < items.size(); ++i)
+            {
+                Item& it = items.getReference(i);
+
+                if (it.order <= order)
+                    it.size = jmax (it.minSize, it.minSize + (it.size - it.minSize) * scale);
+            }
+        }
+
+        if (nextHighestOrder < std::numeric_limits<int>::max())
+            order = nextHighestOrder;
+        else
+            break;
+    }
+}
+
+} // namespace juce