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/native/juce_MultiTouchMapper.h

@@ -0,0 +1,114 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+template <typename IDType>
+class MultiTouchMapper
+{
+public:
+    MultiTouchMapper() {}
+
+    int getIndexOfTouch (ComponentPeer* peer, IDType touchID)
+    {
+        jassert (touchID != 0); // need to rethink this if IDs can be 0!
+        TouchInfo info {touchID, peer};
+
+        int touchIndex = currentTouches.indexOf (info);
+
+        if (touchIndex < 0)
+        {
+            auto emptyTouchIndex = currentTouches.indexOf ({});
+            touchIndex = (emptyTouchIndex >= 0 ? emptyTouchIndex : currentTouches.size());
+
+            currentTouches.set (touchIndex, info);
+        }
+
+        return touchIndex;
+    }
+
+    void clear()
+    {
+        currentTouches.clear();
+    }
+
+    void clearTouch (int index)
+    {
+        currentTouches.set (index, {});
+    }
+
+    bool areAnyTouchesActive() const noexcept
+    {
+        for (auto& t : currentTouches)
+            if (t.touchId != 0)
+                return true;
+
+        return false;
+    }
+
+    void deleteAllTouchesForPeer (ComponentPeer* peer)
+    {
+        for (auto& t : currentTouches)
+            if (t.owner == peer)
+                t.touchId = 0;
+    }
+
+private:
+    //==============================================================================
+    struct TouchInfo
+    {
+        TouchInfo() noexcept  : touchId (0), owner (nullptr) {}
+        TouchInfo (IDType idToUse, ComponentPeer* peer) noexcept  : touchId (idToUse), owner (peer) {}
+
+        TouchInfo (const TouchInfo&) = default;
+        TouchInfo& operator= (const TouchInfo&) = default;
+
+        // VS2013 can't default move constructors
+        TouchInfo (TouchInfo&& other) noexcept  : touchId (other.touchId), owner (other.owner) {}
+
+        // VS2013 can't default move assignments
+        TouchInfo& operator= (TouchInfo&& other) noexcept
+        {
+            touchId = other.touchId;
+            owner = other.owner;
+
+            return *this;
+        }
+
+        IDType touchId;
+        ComponentPeer* owner;
+
+        bool operator== (const TouchInfo& o) const noexcept     { return (touchId == o.touchId); }
+    };
+
+    //==============================================================================
+    Array<TouchInfo> currentTouches;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MultiTouchMapper)
+};
+
+} // namespace juce