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_extra/misc/juce_WebBrowserComponent.h

@@ -0,0 +1,160 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+#if JUCE_WEB_BROWSER || DOXYGEN
+
+//==============================================================================
+/**
+    A component that displays an embedded web browser.
+
+    The browser itself will be platform-dependent. On the Mac, probably Safari, on
+    Windows, probably IE.
+
+
+    @tags{GUI}
+*/
+class JUCE_API  WebBrowserComponent      : public Component
+{
+public:
+    //==============================================================================
+    /** Creates a WebBrowserComponent.
+
+        Once it's created and visible, send the browser to a URL using goToURL().
+
+        @param unloadPageWhenBrowserIsHidden  if this is true, then when the browser
+                            component is taken offscreen, it'll clear the current page
+                            and replace it with a blank page - this can be handy to stop
+                            the browser using resources in the background when it's not
+                            actually being used.
+    */
+    explicit WebBrowserComponent (bool unloadPageWhenBrowserIsHidden = true);
+
+    /** Destructor. */
+    ~WebBrowserComponent();
+
+    //==============================================================================
+    /** Sends the browser to a particular URL.
+
+        @param url      the URL to go to.
+        @param headers  an optional set of parameters to put in the HTTP header. If
+                        you supply this, it should be a set of string in the form
+                        "HeaderKey: HeaderValue"
+        @param postData an optional block of data that will be attached to the HTTP
+                        POST request
+    */
+    void goToURL (const String& url,
+                  const StringArray* headers = nullptr,
+                  const MemoryBlock* postData = nullptr);
+
+    /** Stops the current page loading. */
+    void stop();
+
+    /** Sends the browser back one page. */
+    void goBack();
+
+    /** Sends the browser forward one page. */
+    void goForward();
+
+    /** Refreshes the browser. */
+    void refresh();
+
+    /** Clear cookies that the OS has stored for the WebComponents of this application */
+    static void clearCookies();
+
+    //==============================================================================
+    /** This callback is called when the browser is about to navigate
+        to a new location.
+
+        You can override this method to perform some action when the user
+        tries to go to a particular URL. To allow the operation to carry on,
+        return true, or return false to stop the navigation happening.
+    */
+    virtual bool pageAboutToLoad (const String& newURL);
+
+    /** This callback happens when the browser has finished loading a page. */
+    virtual void pageFinishedLoading (const String& url);
+
+    /** This callback happens when a network error was encountered while
+        trying to load a page.
+
+        You can override this method to show some other error page by calling
+        goToURL. Return true to allow the browser to carry on to the internal
+        browser error page.
+
+        The errorInfo contains some platform dependent string describing the
+        error.
+    */
+    virtual bool pageLoadHadNetworkError (const String& errorInfo);
+
+    /** This callback occurs when a script or other activity in the browser asks for
+        the window to be closed.
+    */
+    virtual void windowCloseRequest();
+
+    /** This callback occurs when the browser attempts to load a URL in a new window.
+        This won't actually load the window but gives you a chance to either launch a
+        new window yourself or just load the URL into the current window with goToURL().
+     */
+    virtual void newWindowAttemptingToLoad (const String& newURL);
+
+    //==============================================================================
+    /** @internal */
+    void paint (Graphics&) override;
+    /** @internal */
+    void resized() override;
+    /** @internal */
+    void parentHierarchyChanged() override;
+    /** @internal */
+    void visibilityChanged() override;
+    /** @internal */
+    void focusGained (FocusChangeType) override;
+
+private:
+    //==============================================================================
+    class Pimpl;
+    std::unique_ptr<Pimpl> browser;
+    bool blankPageShown = false, unloadPageWhenBrowserIsHidden;
+    String lastURL;
+    StringArray lastHeaders;
+    MemoryBlock lastPostData;
+
+    void reloadLastURL();
+    void checkWindowAssociation();
+
+  #if JUCE_ANDROID
+    friend bool juce_webViewPageLoadStarted (WebBrowserComponent*, const String&);
+  #endif
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WebBrowserComponent)
+};
+
+
+#endif
+
+} // namespace juce