Refactor cursor mode paths

This is the refactoring part of adding GLFW_CURSOR_CAPTURED, separated
out to help keep 3.3-stable similar to the main branch.

Related to #58.

src/win32_platform.h

@@ -452,6 +452,8 @@ typedef struct _GLFWlibraryWin32
     double              restoreCursorPosX, restoreCursorPosY;
     // The window whose disabled cursor mode is active
     _GLFWwindow*        disabledCursorWindow;
+    // The window the cursor is captured in
+    _GLFWwindow*        capturedCursorWindow;
     RAWINPUT*           rawInput;
     int                 rawInputSize;
     UINT                mouseTrailSize;

src/win32_window.c

@@ -249,20 +249,24 @@ static void updateCursorImage(_GLFWwindow* window)
         SetCursor(NULL);
 }
 
-// Updates the cursor clip rect
+// Sets the cursor clip rect to the window content area
 //
-static void updateClipRect(_GLFWwindow* window)
+static void captureCursor(_GLFWwindow* window)
 {
-    if (window)
-    {
-        RECT clipRect;
-        GetClientRect(window->win32.handle, &clipRect);
-        ClientToScreen(window->win32.handle, (POINT*) &clipRect.left);
-        ClientToScreen(window->win32.handle, (POINT*) &clipRect.right);
-        ClipCursor(&clipRect);
-    }
-    else
-        ClipCursor(NULL);
+    RECT clipRect;
+    GetClientRect(window->win32.handle, &clipRect);
+    ClientToScreen(window->win32.handle, (POINT*) &clipRect.left);
+    ClientToScreen(window->win32.handle, (POINT*) &clipRect.right);
+    ClipCursor(&clipRect);
+    _glfw.win32.capturedCursorWindow = window;
+}
+
+// Disabled clip cursor
+//
+static void releaseCursor(void)
+{
+    ClipCursor(NULL);
+    _glfw.win32.capturedCursorWindow = NULL;
 }
 
 // Enables WM_INPUT messages for the mouse for the specified window
@@ -301,7 +305,7 @@ static void disableCursor(_GLFWwindow* window)
                            &_glfw.win32.restoreCursorPosY);
     updateCursorImage(window);
     _glfwCenterCursorInContentArea(window);
-    updateClipRect(window);
+    captureCursor(window);
 
     if (window->rawMouseMotion)
         enableRawMouseMotion(window);
@@ -315,7 +319,7 @@ static void enableCursor(_GLFWwindow* window)
         disableRawMouseMotion(window);
 
     _glfw.win32.disabledCursorWindow = NULL;
-    updateClipRect(NULL);
+    releaseCursor();
     _glfwSetCursorPosWin32(window,
                            _glfw.win32.restoreCursorPosX,
                            _glfw.win32.restoreCursorPosY);
@@ -1004,8 +1008,8 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM l
                                        (window->win32.maximized &&
                                         wParam != SIZE_RESTORED);
 
-            if (_glfw.win32.disabledCursorWindow == window)
-                updateClipRect(window);
+            if (_glfw.win32.capturedCursorWindow == window)
+                captureCursor(window);
 
             if (window->win32.iconified != iconified)
                 _glfwInputWindowIconify(window, iconified);
@@ -1040,8 +1044,8 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM l
 
         case WM_MOVE:
         {
-            if (_glfw.win32.disabledCursorWindow == window)
-                updateClipRect(window);
+            if (_glfw.win32.capturedCursorWindow == window)
+                captureCursor(window);
 
             // NOTE: This cannot use LOWORD/HIWORD recommended by MSDN, as
             // those macros do not handle negative window positions correctly
@@ -1495,7 +1499,10 @@ void _glfwDestroyWindowWin32(_GLFWwindow* window)
         window->context.destroy(window);
 
     if (_glfw.win32.disabledCursorWindow == window)
-        _glfw.win32.disabledCursorWindow = NULL;
+        enableCursor(window);
+
+    if (_glfw.win32.capturedCursorWindow == window)
+        releaseCursor();
 
     if (window->win32.handle)
     {
@@ -2142,14 +2149,40 @@ void _glfwSetCursorPosWin32(_GLFWwindow* window, double xpos, double ypos)
 
 void _glfwSetCursorModeWin32(_GLFWwindow* window, int mode)
 {
-    if (mode == GLFW_CURSOR_DISABLED)
+    if (_glfwWindowFocusedWin32(window))
     {
-        if (_glfwWindowFocusedWin32(window))
-            disableCursor(window);
+        if (mode == GLFW_CURSOR_DISABLED)
+        {
+            _glfwGetCursorPosWin32(window,
+                                   &_glfw.win32.restoreCursorPosX,
+                                   &_glfw.win32.restoreCursorPosY);
+            _glfwCenterCursorInContentArea(window);
+            if (window->rawMouseMotion)
+                enableRawMouseMotion(window);
+        }
+        else if (_glfw.win32.disabledCursorWindow == window)
+        {
+            if (window->rawMouseMotion)
+                disableRawMouseMotion(window);
+        }
+
+        if (mode == GLFW_CURSOR_DISABLED)
+            captureCursor(window);
+        else
+            releaseCursor();
+
+        if (mode == GLFW_CURSOR_DISABLED)
+            _glfw.win32.disabledCursorWindow = window;
+        else if (_glfw.win32.disabledCursorWindow == window)
+        {
+            _glfw.win32.disabledCursorWindow = NULL;
+            _glfwSetCursorPosWin32(window,
+                                   _glfw.win32.restoreCursorPosX,
+                                   _glfw.win32.restoreCursorPosY);
+        }
     }
-    else if (_glfw.win32.disabledCursorWindow == window)
-        enableCursor(window);
-    else if (cursorInContentArea(window))
+
+    if (cursorInContentArea(window))
         updateCursorImage(window);
 }
 

src/wl_window.c

@@ -2556,7 +2556,8 @@ void _glfwSetCursorWayland(_GLFWwindow* window, _GLFWcursor* cursor)
         if (!window->wl.lockedPointer)
             lockPointer(window);
     }
-    else
+    else if (window->cursorMode == GLFW_CURSOR_NORMAL ||
+             window->cursorMode == GLFW_CURSOR_HIDDEN)
     {
         if (window->wl.lockedPointer)
             unlockPointer(window);
@@ -2597,8 +2598,11 @@ void _glfwSetCursorWayland(_GLFWwindow* window, _GLFWcursor* cursor)
             setCursorImage(window, &cursorWayland);
         }
     }
-    else
+    else if (window->cursorMode == GLFW_CURSOR_HIDDEN ||
+             window->cursorMode == GLFW_CURSOR_DISABLED)
+    {
         wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerEnterSerial, NULL, 0, 0);
+    }
 }
 
 static void dataSourceHandleTarget(void* userData,

src/x11_window.c

@@ -470,6 +470,25 @@ static void updateCursorImage(_GLFWwindow* window)
     }
 }
 
+// Grabs the cursor and confines it to the window
+//
+static void captureCursor(_GLFWwindow* window)
+{
+    XGrabPointer(_glfw.x11.display, window->x11.handle, True,
+                 ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
+                 GrabModeAsync, GrabModeAsync,
+                 window->x11.handle,
+                 None,
+                 CurrentTime);
+}
+
+// Ungrabs the cursor
+//
+static void releaseCursor(void)
+{
+    XUngrabPointer(_glfw.x11.display, CurrentTime);
+}
+
 // Enable XI2 raw mouse motion events
 //
 static void enableRawMouseMotion(_GLFWwindow* window)
@@ -512,12 +531,7 @@ static void disableCursor(_GLFWwindow* window)
                          &_glfw.x11.restoreCursorPosY);
     updateCursorImage(window);
     _glfwCenterCursorInContentArea(window);
-    XGrabPointer(_glfw.x11.display, window->x11.handle, True,
-                 ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
-                 GrabModeAsync, GrabModeAsync,
-                 window->x11.handle,
-                 _glfw.x11.hiddenCursorHandle,
-                 CurrentTime);
+    captureCursor(window);
 }
 
 // Exit disabled cursor mode for the specified window
@@ -528,7 +542,7 @@ static void enableCursor(_GLFWwindow* window)
         disableRawMouseMotion(window);
 
     _glfw.x11.disabledCursorWindow = NULL;
-    XUngrabPointer(_glfw.x11.display, CurrentTime);
+    releaseCursor();
     _glfwSetCursorPosX11(window,
                          _glfw.x11.restoreCursorPosX,
                          _glfw.x11.restoreCursorPosY);
@@ -1986,7 +2000,7 @@ GLFWbool _glfwCreateWindowX11(_GLFWwindow* window,
 void _glfwDestroyWindowX11(_GLFWwindow* window)
 {
     if (_glfw.x11.disabledCursorWindow == window)
-        _glfw.x11.disabledCursorWindow = NULL;
+        enableCursor(window);
 
     if (window->monitor)
         releaseMonitor(window);
@@ -2800,16 +2814,40 @@ void _glfwSetCursorPosX11(_GLFWwindow* window, double x, double y)
 
 void _glfwSetCursorModeX11(_GLFWwindow* window, int mode)
 {
-    if (mode == GLFW_CURSOR_DISABLED)
+    if (_glfwWindowFocusedX11(window))
     {
-        if (_glfwWindowFocusedX11(window))
-            disableCursor(window);
+        if (mode == GLFW_CURSOR_DISABLED)
+        {
+            _glfwGetCursorPosX11(window,
+                                 &_glfw.x11.restoreCursorPosX,
+                                 &_glfw.x11.restoreCursorPosY);
+            _glfwCenterCursorInContentArea(window);
+            if (window->rawMouseMotion)
+                enableRawMouseMotion(window);
+        }
+        else if (_glfw.x11.disabledCursorWindow == window)
+        {
+            if (window->rawMouseMotion)
+                disableRawMouseMotion(window);
+        }
+
+        if (mode == GLFW_CURSOR_DISABLED)
+            captureCursor(window);
+        else
+            releaseCursor();
+
+        if (mode == GLFW_CURSOR_DISABLED)
+            _glfw.x11.disabledCursorWindow = window;
+        else if (_glfw.x11.disabledCursorWindow == window)
+        {
+            _glfw.x11.disabledCursorWindow = NULL;
+            _glfwSetCursorPosX11(window,
+                                 _glfw.x11.restoreCursorPosX,
+                                 _glfw.x11.restoreCursorPosY);
+        }
     }
-    else if (_glfw.x11.disabledCursorWindow == window)
-        enableCursor(window);
-    else
-        updateCursorImage(window);
 
+    updateCursorImage(window);
     XFlush(_glfw.x11.display);
 }