0032433: Visualization, TKService - introduce Wasm_Window implementing Aspect_Window interface using Emscripten SDK

Introduced Wasm_Window implementing Aspect_Window interface.

Aspect_WindowInputListener has been extended by touch input callbacks (moved from AIS_ViewController),
which now implements redirection of single taps to UpdateMouseClick().

AIS_ViewController::FetchNavigationKeys() now requests more frames even if Delta is zero,
but navigation keys are pressed - indicated by a new flag AIS_WalkDelta::IsDefined().

Fixed missing implementation of Xw_Window::DisplayConnection() getter.
The property has been moved to the base class Aspect_Window.

Removed unused Aspect_Convert.hxx.

DRAWEXE targeting Wasm:
- added exposing of FS interface so that it is possible uploading/downloading files to/from emulated file system on JavaScript level;
- added printer redirecting messages to Module.printMessage callback accepting message gravity;
- Run_Appli() now skips std::cin when Module.noExitRuntime is set.

src/Xw/Xw_Window.cxx

@@ -15,7 +15,6 @@
 
 #include <Xw_Window.hxx>
 
-#include <Aspect_Convert.hxx>
 #include <Aspect_ScrollDelta.hxx>
 #include <Aspect_WindowDefinitionError.hxx>
 #include <Aspect_WindowInputListener.hxx>
@@ -44,7 +43,6 @@ Xw_Window::Xw_Window (const Handle(Aspect_DisplayConnection)& theXDisplay,
                       const Standard_Integer thePxWidth,
                       const Standard_Integer thePxHeight)
 : Aspect_Window(),
-  myDisplay  (theXDisplay),
   myXWindow  (0),
   myFBConfig (NULL),
   myXLeft    (thePxLeft),
@@ -53,6 +51,7 @@ Xw_Window::Xw_Window (const Handle(Aspect_DisplayConnection)& theXDisplay,
   myYBottom  (thePxTop + thePxHeight),
   myIsOwnWin (Standard_True)
 {
+  myDisplay = theXDisplay;
   if (thePxWidth <= 0 || thePxHeight <= 0)
   {
     throw Aspect_WindowDefinitionError("Xw_Window, Coordinate(s) out of range");
@@ -129,7 +128,6 @@ Xw_Window::Xw_Window (const Handle(Aspect_DisplayConnection)& theXDisplay,
                       const Aspect_Drawable theXWin,
                       const Aspect_FBConfig theFBConfig)
 : Aspect_Window(),
-  myDisplay  (theXDisplay),
   myXWindow  (theXWin),
   myFBConfig (theFBConfig),
   myXLeft    (0),
@@ -138,6 +136,7 @@ Xw_Window::Xw_Window (const Handle(Aspect_DisplayConnection)& theXDisplay,
   myYBottom  (512),
   myIsOwnWin (Standard_False)
 {
+  myDisplay = theXDisplay;
   if (theXWin == 0)
   {
     throw Aspect_WindowDefinitionError("Xw_Window, given invalid X window");

src/Xw/Xw_Window.hxx

@@ -93,9 +93,6 @@ public:
   //! @return native Window handle
   Aspect_Drawable XWindow() const { return myXWindow; }
 
-  //! @return connection to X Display
-  Standard_EXPORT const Handle(Aspect_DisplayConnection)& DisplayConnection() const;
-
   //! @return native Window handle
   virtual Aspect_Drawable NativeHandle() const Standard_OVERRIDE
   {
@@ -133,7 +130,6 @@ public:
 
 protected:
 
-  Handle(Aspect_DisplayConnection) myDisplay; //!< X Display connection
   Aspect_Drawable  myXWindow;  //!< XLib window handle
   Aspect_FBConfig  myFBConfig; //!< GLXFBConfig
   Standard_Integer myXLeft;    //!< left   position in pixels