[NOTEPAD] Use wait cursor (#5659)

- Add WaitCursor helper function to display the wait cursor while
  heavy operation.
- Manage the wait cursor by using a lock count.
CORE-18837

base/applications/notepad/dialog.c

@@ -111,6 +111,33 @@ void UpdateWindowCaption(BOOL clearModifyAlert)
     SetWindowText(Globals.hMainWnd, szCaption);
 }
 
+VOID WaitCursor(BOOL bBegin)
+{
+    static HCURSOR s_hWaitCursor = NULL;
+    static HCURSOR s_hOldCursor = NULL;
+    static INT s_nLock = 0;
+
+    if (bBegin)
+    {
+        if (s_nLock++ == 0)
+        {
+            if (s_hWaitCursor == NULL)
+                s_hWaitCursor = LoadCursor(NULL, IDC_WAIT);
+            s_hOldCursor = SetCursor(s_hWaitCursor);
+        }
+        else
+        {
+            SetCursor(s_hWaitCursor);
+        }
+    }
+    else
+    {
+        if (--s_nLock == 0)
+            SetCursor(s_hOldCursor);
+    }
+}
+
+
 VOID DIALOG_StatusBarAlignParts(VOID)
 {
     static const int defaultWidths[] = {120, 120, 120};
@@ -220,11 +247,14 @@ static BOOL DoSaveFile(VOID)
     HANDLE hFile;
     DWORD cchText;
 
+    WaitCursor(TRUE);
+
     hFile = CreateFileW(Globals.szFileName, GENERIC_WRITE, FILE_SHARE_WRITE,
                         NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
     if (hFile == INVALID_HANDLE_VALUE)
     {
         ShowLastError();
+        WaitCursor(FALSE);
         return FALSE;
     }
 
@@ -259,6 +289,7 @@ static BOOL DoSaveFile(VOID)
         SetFileName(Globals.szFileName);
     }
 
+    WaitCursor(FALSE);
     return bRet;
 }
 
@@ -307,6 +338,8 @@ VOID DoOpenFile(LPCTSTR szFileName)
     if (!DoCloseFile())
         return;
 
+    WaitCursor(TRUE);
+
     hFile = CreateFile(szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
                        OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
     if (hFile == INVALID_HANDLE_VALUE)
@@ -347,6 +380,7 @@ VOID DoOpenFile(LPCTSTR szFileName)
 done:
     if (hFile != INVALID_HANDLE_VALUE)
         CloseHandle(hFile);
+    WaitCursor(FALSE);
 }
 
 VOID DIALOG_FileNew(VOID)
@@ -355,6 +389,8 @@ VOID DIALOG_FileNew(VOID)
     if (!DoCloseFile())
         return;
 
+    WaitCursor(TRUE);
+
     SetWindowText(Globals.hEdit, NULL);
     SendMessage(Globals.hEdit, EM_EMPTYUNDOBUFFER, 0, 0);
     Globals.iEoln = EOLN_CRLF;
@@ -362,13 +398,20 @@ VOID DIALOG_FileNew(VOID)
 
     NOTEPAD_EnableSearchMenu();
     DIALOG_StatusBarUpdateAll();
+
+    WaitCursor(FALSE);
 }
 
 VOID DIALOG_FileNewWindow(VOID)
 {
     TCHAR pszNotepadExe[MAX_PATH];
+
+    WaitCursor(TRUE);
+
     GetModuleFileName(NULL, pszNotepadExe, _countof(pszNotepadExe));
     ShellExecute(NULL, NULL, pszNotepadExe, NULL, NULL, SW_SHOWNORMAL);
+
+    WaitCursor(FALSE);
 }
 
 VOID DIALOG_FileOpen(VOID)

base/applications/notepad/dialog.h

@@ -57,3 +57,4 @@ VOID DoOpenFile(LPCTSTR szFileName);
 VOID DoShowHideStatusBar(VOID);
 VOID DoCreateEditWindow(VOID);
 void UpdateWindowCaption(BOOL clearModifyAlert);
+VOID WaitCursor(BOOL bBegin);

base/applications/notepad/main.c

@@ -433,6 +433,8 @@ NOTEPAD_WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
             FINDREPLACE *pFindReplace = (FINDREPLACE *) lParam;
             Globals.find = *(FINDREPLACE *) lParam;
 
+            WaitCursor(TRUE);
+
             if (pFindReplace->Flags & FR_FINDNEXT)
                 NOTEPAD_FindNext(pFindReplace, FALSE, TRUE);
             else if (pFindReplace->Flags & FR_REPLACE)
@@ -441,6 +443,8 @@ NOTEPAD_WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
                 NOTEPAD_ReplaceAll(pFindReplace);
             else if (pFindReplace->Flags & FR_DIALOGTERM)
                 NOTEPAD_FindTerm();
+
+            WaitCursor(FALSE);
             break;
         }
 
@@ -587,7 +591,7 @@ int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE prev, LPTSTR cmdline, int sh
     wndclass.lpfnWndProc = NOTEPAD_WndProc;
     wndclass.hInstance = Globals.hInstance;
     wndclass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_NPICON));
-    wndclass.hCursor = LoadCursor(0, IDC_ARROW);
+    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
     wndclass.lpszMenuName = MAKEINTRESOURCE(MAIN_MENU);
     wndclass.lpszClassName = className;