[reactos] 01/01: [NTUSER] Optimize Window Snap Disabling (#5061)

[Joachim Henze]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d04e148d1c49975de0803…

commit d04e148d1c49975de0803299055a47eedbc94487
Author:     Joachim Henze <joachim.henze(a)reactos.org>
AuthorDate: Thu Feb 16 19:33:37 2023 +0100
Commit:     GitHub <noreply(a)github.com>
CommitDate: Thu Feb 16 19:33:37 2023 +0100

    [NTUSER] Optimize Window Snap Disabling (#5061)
---
 win32ss/user/ntuser/defwnd.c    | 48 +++++++++++++++-------------------
 win32ss/user/ntuser/nonclient.c | 57 +++++++++++++++++------------------------
 2 files changed, 43 insertions(+), 62 deletions(-)

diff --git a/win32ss/user/ntuser/defwnd.c b/win32ss/user/ntuser/defwnd.c
index 05a1db08877..81ece247b78 100644
--- a/win32ss/user/ntuser/defwnd.c
+++ b/win32ss/user/ntuser/defwnd.c
@@ -404,18 +404,18 @@ UserPaintCaption(PWND pWnd, INT Flags)
   {
       if (pWnd->state & WNDS_HASCAPTION &&
pWnd->head.pti->MessageQueue == gpqForeground)
          Flags |= DC_ACTIVE;
-    /* 
+    /*
      * When themes are not enabled we can go on and paint the non client area.
      * However if we do that with themes enabled we will draw a classic frame.
      * This is solved by sending a themes specific message to notify the themes
-     * engine that the caption needs to be redrawn 
+     * engine that the caption needs to be redrawn.
      */
       if (gpsi->dwSRVIFlags & SRVINFO_APIHOOK)
       {
-        /* 
+        /*
          * This will cause uxtheme to either paint the themed caption or call
          * RealUserDrawCaption in order to draw the classic caption when themes
-         * are disabled but the themes service is enabled
+         * are disabled but the themes service is enabled.
          */
          TRACE("UDCB Flags %08x\n", Flags);
          co_IntSendMessage(UserHMGetHandle(pWnd), WM_NCUAHDRAWCAPTION, Flags, 0);
@@ -440,7 +440,7 @@ DefWndSetIcon(PWND pWnd, WPARAM wParam, LPARAM lParam)
     HICON hIcon, hIconSmall, hIconOld;
 
     if ( wParam > ICON_SMALL2 )
-    {  
+    {
         EngSetLastError(ERROR_INVALID_PARAMETER);
         return 0;
     }
@@ -544,9 +544,6 @@ IntDefWindowProc(
    PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
    LRESULT lResult = 0;
    USER_REFERENCE_ENTRY Ref;
-   BOOL IsTaskBar;
-   DWORD Style;
-   DWORD ExStyle;
 
    if (Msg > WM_USER) return 0;
 
@@ -792,32 +789,27 @@ IntDefWindowProc(
                co_IntSendMessage(UserHMGetHandle(Wnd), WM_CONTEXTMENU,
(WPARAM)UserHMGetHandle(Wnd), MAKELPARAM(-1, -1));
             }
          }
-         if (IS_KEY_DOWN(gafAsyncKeyState, VK_LWIN) || IS_KEY_DOWN(gafAsyncKeyState,
VK_RWIN))
+         if (g_bWindowSnapEnabled && (IS_KEY_DOWN(gafAsyncKeyState, VK_LWIN) ||
IS_KEY_DOWN(gafAsyncKeyState, VK_RWIN)))
          {
+            BOOL IsTaskBar;
+            DWORD StyleTB;
+            DWORD ExStyleTB;
             HWND hwndTop = UserGetForegroundWindow();
             PWND topWnd = UserGetWindowObject(hwndTop);
 
-            /* Test for typical TaskBar ExStyle Values */
-            ExStyle = (topWnd->ExStyle & WS_EX_TOOLWINDOW);
-            TRACE("ExStyle is '%x'.\n", ExStyle);
-
-            /* Test for typical TaskBar Style Values */
-            Style = (topWnd->style & (WS_POPUP | WS_VISIBLE |
-                        WS_CLIPSIBLINGS | WS_CLIPCHILDREN));
-            TRACE("Style is '%x'.\n", Style);
-
-            /* Test for masked typical TaskBar Style and ExStyles to detect TaskBar */
-            IsTaskBar = (Style == (WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS |
WS_CLIPCHILDREN))
-                        && (ExStyle == WS_EX_TOOLWINDOW);
-            TRACE("This %s the TaskBar.\n", IsTaskBar ? "is" :
"is not");
+            // We want to forbid snapping operations on the TaskBar
+            // We use a heuristic for detecting the TaskBar Wnd by its typical Style
& ExStyle Values
+            ExStyleTB = (topWnd->ExStyle & WS_EX_TOOLWINDOW);
+            StyleTB = (topWnd->style & (WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS |
WS_CLIPCHILDREN));
+            IsTaskBar = (StyleTB == (WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS |
WS_CLIPCHILDREN))
+                        && (ExStyleTB == WS_EX_TOOLWINDOW);
+            TRACE("ExStyle=%x Style=%x IsTaskBar=%d\n", ExStyleTB, StyleTB,
IsTaskBar);
 
-            if (topWnd && !IsTaskBar)  /* Second test is so we are not touching
the Taskbar */
+            if (topWnd && !IsTaskBar)
             {
-               if ((topWnd->style & WS_THICKFRAME) == 0 || !g_bWindowSnapEnabled)
-               {
+               if ((topWnd->style & WS_THICKFRAME) == 0)
                   return 0;
-               }
-               
+
                if (wParam == VK_DOWN)
                {
                    if (topWnd->style & WS_MAXIMIZE)
@@ -835,7 +827,7 @@ IntDefWindowProc(
                else if (wParam == VK_UP)
                {
                   RECT currentRect;
-                  if ((topWnd->InternalPos.NormalRect.right ==
topWnd->InternalPos.NormalRect.left) || 
+                  if ((topWnd->InternalPos.NormalRect.right ==
topWnd->InternalPos.NormalRect.left) ||
                       (topWnd->InternalPos.NormalRect.top ==
topWnd->InternalPos.NormalRect.bottom))
                   {
                       currentRect = topWnd->rcWindow;
diff --git a/win32ss/user/ntuser/nonclient.c b/win32ss/user/ntuser/nonclient.c
index ab7d00143b4..69291c50adb 100644
--- a/win32ss/user/ntuser/nonclient.c
+++ b/win32ss/user/ntuser/nonclient.c
@@ -256,8 +256,6 @@ DefWndDoSizeMove(PWND pwnd, WORD wParam)
    //PMONITOR mon = 0; Don't port sync from wine!!! This breaks explorer task bar
sizing!!
    //                  The task bar can grow in size and can not reduce due to the
change
    //                  in the work area.
-   DWORD ExStyleTB, StyleTB;
-   BOOL IsTaskBar;
 
    Style = pwnd->style;
    ExStyle = pwnd->ExStyle;
@@ -393,35 +391,33 @@ DefWndDoSizeMove(PWND pwnd, WORD wParam)
       if (!co_IntGetPeekMessage(&msg, 0, 0, 0, PM_REMOVE, TRUE)) break;
       if (IntCallMsgFilter( &msg, MSGF_SIZE )) continue;
 
-      /* Exit on button-up */
-      if (msg.message == WM_LBUTTONUP)
-      {
-         /* Test for typical TaskBar ExStyle Values */
-         ExStyleTB = (ExStyle & WS_EX_TOOLWINDOW);
-         TRACE("ExStyle is '%x'.\n", ExStyleTB);
+      if (msg.message == WM_KEYDOWN && (msg.wParam == VK_RETURN || msg.wParam ==
VK_ESCAPE))
+         break; // Exit on Return or Esc
 
-         /* Test for typical TaskBar Style Values */
-         StyleTB = (Style & (WS_POPUP | WS_VISIBLE |
-                        WS_CLIPSIBLINGS | WS_CLIPCHILDREN));
-         TRACE("Style is '%x'.\n", StyleTB);
+      if (!g_bWindowSnapEnabled && (msg.message == WM_LBUTTONUP))
+      { // If no WindowSnapEnabled: Exit on button-up immediately
+         break;
+      }
+      else if (g_bWindowSnapEnabled && msg.message == WM_LBUTTONUP)
+      { // If WindowSnapEnabled: Decide whether to snap before exiting
+         DWORD ExStyleTB, StyleTB;
+         BOOL IsTaskBar;
 
-         /* Test for masked typical TaskBar Style and ExStyles to detect TaskBar */
+         // We want to forbid snapping operations on the TaskBar
+         // We use a heuristic for detecting the TaskBar Wnd by its typical Style &
ExStyle Values
+         ExStyleTB = (ExStyle & WS_EX_TOOLWINDOW);
+         StyleTB = (Style & (WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS |
WS_CLIPCHILDREN));
          IsTaskBar = (StyleTB == (WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS |
WS_CLIPCHILDREN))
                      && (ExStyleTB == WS_EX_TOOLWINDOW);
-         TRACE("This %s the TaskBar.\n", IsTaskBar ? "is" : "is
not");
+         TRACE("ExStyle=%x Style=%x IsTaskBar=%d\n", ExStyleTB, StyleTB,
IsTaskBar);
 
          // check for snapping if was moved by caption
-         if (hittest == HTCAPTION && thickframe && (ExStyle &
WS_EX_MDICHILD) == 0)
+         if (!IsTaskBar && hittest == HTCAPTION && thickframe &&
(ExStyle & WS_EX_MDICHILD) == 0)
          {
             RECT snapRect;
             BOOL doSideSnap = FALSE;
             UserSystemParametersInfo(SPI_GETWORKAREA, 0, &snapRect, 0);
 
-            /* if this is the taskbar, then we want to just exit */
-            if (IsTaskBar || !g_bWindowSnapEnabled)
-            {
-               break;
-            }
             // snap to left
             if (pt.x <= snapRect.left)
             {
@@ -434,7 +430,7 @@ DefWndDoSizeMove(PWND pwnd, WORD wParam)
                snapRect.left = (snapRect.right - snapRect.left) / 2 + snapRect.left;
                doSideSnap = TRUE;
             }
-            
+
             if (doSideSnap)
             {
                co_WinPosSetWindowPos(pwnd,
@@ -458,13 +454,6 @@ DefWndDoSizeMove(PWND pwnd, WORD wParam)
          }
          break;
       }
-      
-      /* Exit on Return or Esc */
-      if (msg.message == WM_KEYDOWN &&
-          (msg.wParam == VK_RETURN || msg.wParam == VK_ESCAPE))
-      {
-         break;
-      }
 
       if ((msg.message != WM_KEYDOWN) && (msg.message != WM_MOUSEMOVE))
       {
@@ -1285,7 +1274,7 @@ LRESULT NC_HandleNCCalcSize( PWND Wnd, WPARAM wparam, RECTL *Rect,
BOOL Suspende
    SIZE WindowBorders;
    RECT OrigRect;
    LONG Style = Wnd->style;
-   LONG  exStyle = Wnd->ExStyle; 
+   LONG exStyle = Wnd->ExStyle;
 
    if (Rect == NULL)
    {
@@ -1662,7 +1651,7 @@ NC_HandleNCLButtonDblClk(PWND pWnd, WPARAM wParam, LPARAM lParam)
     {
       PMENU SysMenu = IntGetSystemMenu(pWnd, FALSE);
       UINT state = IntGetMenuState(SysMenu ? UserHMGetHandle(SysMenu) : NULL, SC_CLOSE,
MF_BYCOMMAND);
-                  
+
       /* If the close item of the sysmenu is disabled or not present do nothing */
       if ((state & (MF_DISABLED | MF_GRAYED)) || (state == 0xFFFFFFFF))
           break;
@@ -1674,12 +1663,12 @@ NC_HandleNCLButtonDblClk(PWND pWnd, WPARAM wParam, LPARAM lParam)
     case HTBOTTOM:
     {
       RECT sizingRect = pWnd->rcWindow, mouseRect;
-      
+
       if (pWnd->ExStyle & WS_EX_MDICHILD)
           break;
-      
+
       UserSystemParametersInfo(SPI_GETWORKAREA, 0, &mouseRect, 0);
-        
+
       co_WinPosSetWindowPos(pWnd,
                             NULL,
                             sizingRect.left,
@@ -1700,7 +1689,7 @@ NC_HandleNCLButtonDblClk(PWND pWnd, WPARAM wParam, LPARAM lParam)
  *
  * Handle a WM_NCRBUTTONDOWN message. Called from DefWindowProc().
  */
-LRESULT NC_HandleNCRButtonDown( PWND pwnd, WPARAM wParam, LPARAM lParam ) 
+LRESULT NC_HandleNCRButtonDown(PWND pwnd, WPARAM wParam, LPARAM lParam)
 {
   MSG msg;
   INT hittest = wParam;