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/keyboard/juce_TextInputTarget.h

@@ -0,0 +1,97 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+//==============================================================================
+/**
+    An abstract base class which can be implemented by components that function as
+    text editors.
+
+    This class allows different types of text editor component to provide a uniform
+    interface, which can be used by things like OS-specific input methods, on-screen
+    keyboards, etc.
+
+    @tags{GUI}
+*/
+class JUCE_API  TextInputTarget
+{
+public:
+    //==============================================================================
+    /** */
+    TextInputTarget() {}
+
+    /** Destructor. */
+    virtual ~TextInputTarget() {}
+
+    /** Returns true if this input target is currently accepting input.
+        For example, a text editor might return false if it's in read-only mode.
+    */
+    virtual bool isTextInputActive() const = 0;
+
+    /** Returns the extents of the selected text region, or an empty range if
+        nothing is selected,
+    */
+    virtual Range<int> getHighlightedRegion() const = 0;
+
+    /** Sets the currently-selected text region. */
+    virtual void setHighlightedRegion (const Range<int>& newRange) = 0;
+
+    /** Sets a number of temporarily underlined sections.
+        This is needed by MS Windows input method UI.
+    */
+    virtual void setTemporaryUnderlining (const Array<Range<int>>& underlinedRegions) = 0;
+
+    /** Returns a specified sub-section of the text. */
+    virtual String getTextInRange (const Range<int>& range) const = 0;
+
+    /** Inserts some text, overwriting the selected text region, if there is one. */
+    virtual void insertTextAtCaret (const String& textToInsert) = 0;
+
+    /** Returns the position of the caret, relative to the component's origin. */
+    virtual Rectangle<int> getCaretRectangle() = 0;
+
+    /** A set of possible on-screen keyboard types, for use in the
+        getKeyboardType() method.
+    */
+    enum VirtualKeyboardType
+    {
+        textKeyboard = 0,
+        numericKeyboard,
+        decimalKeyboard,
+        urlKeyboard,
+        emailAddressKeyboard,
+        phoneNumberKeyboard
+    };
+
+    /** Returns the target's preference for the type of keyboard that would be most appropriate.
+        This may be ignored, depending on the capabilities of the OS.
+    */
+    virtual VirtualKeyboardType getKeyboardType()       { return textKeyboard; }
+};
+
+} // namespace juce