Start implementing OS window helpers on Windows, flesh out Utf routines

Source/OS/dn_os_posix.cpp

@@ -1274,6 +1274,53 @@ DN_API void DN_OS_ConditionVariableBroadcast(DN_OSConditionVariable *cv)
   }
 }
 
+DN_API DN_OSWindowMinimise DN_OS_WindowIsMinimised(DN_OSWindow *window)
+{
+  (void)window;
+  DN_AssertInvalidCodePath;
+  return DN_OSWindowMinimise_No;
+}
+
+DN_API DN_OSWindowMaximise DN_OS_WindowIsMaximised(DN_OSWindow *window)
+{
+  (void)window;
+  DN_AssertInvalidCodePath;
+  return DN_OSWindowMaximise_No;
+}
+
+DN_API void DN_OS_WindowSetTitle(DN_OSWindow *window, DN_Str8 title)
+{
+  (void)window;
+  (void)title;
+  DN_AssertInvalidCodePath;
+}
+
+DN_API void DN_OS_WindowShow(DN_OSWindow *window, DN_OSWindowShow show)
+{
+  (void)window;
+  (void)show;
+  DN_AssertInvalidCodePath;
+}
+
+DN_API void DN_OS_WindowBringToFront(DN_OSWindow *window)
+{
+  (void)window;
+  DN_AssertInvalidCodePath;
+}
+
+DN_API void DN_OS_WindowFocus(DN_OSWindow *window)
+{
+  (void)window;
+  DN_AssertInvalidCodePath;
+}
+
+DN_API bool DN_OS_WindowIsFocused(DN_OSWindow *window)
+{
+  (void)window;
+  DN_AssertInvalidCodePath;
+  return false;
+}
+
 // NOTE: DN_OSThread
 static void *DN_OS_ThreadFunc_(void *user_context)
 {

Source/OS/dn_os_w32.cpp

@@ -2,6 +2,7 @@
   #define DN_WITH_OS 1
   #include "../dn.h"
   #include "dn_os_w32.h"
+  #include <windows.h>
 #endif
 
 // NOTE: DN_Mem
@@ -1287,6 +1288,70 @@ DN_API void DN_OS_ConditionVariableBroadcast(DN_OSConditionVariable *cv)
   }
 }
 
+DN_API DN_OSWindowMinimise DN_OS_WindowIsMinimised(DN_OSWindow *window)
+{
+  HWND                hwnd   = window ? DN_Cast(HWND) window->handle : nullptr;
+  DN_OSWindowMinimise result = DN_OSWindowMinimise_No;
+  if (hwnd && IsIconic(hwnd) != 0)
+    result = DN_OSWindowMinimise_Yes;
+  return result;
+}
+
+DN_API DN_OSWindowMaximise DN_OS_WindowIsMaximised(DN_OSWindow *window)
+{
+  HWND                hwnd   = window ? DN_Cast(HWND) window->handle : nullptr;
+  DN_OSWindowMaximise result = DN_OSWindowMaximise_No;
+  if (hwnd && IsZoomed(hwnd) != 0)
+    result = DN_OSWindowMaximise_Yes;
+  return result;
+}
+
+DN_API void DN_OS_WindowSetTitle(DN_OSWindow *window, DN_Str8 title)
+{
+  HWND hwnd = window ? DN_Cast(HWND) window->handle : nullptr;
+  if (hwnd) {
+    DN_TcScratch scratch = DN_TcScratchBeginArena(nullptr, 0);
+    DN_Str16     title16 = DN_OS_W32Str8ToStr16(&scratch.arena, title);
+    SetWindowTextW(hwnd, (WCHAR *)title16.data);
+    DN_TcScratchEnd(&scratch);
+  }
+}
+
+DN_API void DN_OS_WindowShow(DN_OSWindow *window, DN_OSWindowShow show)
+{
+  switch (show) {
+    case DN_OSWindowShow_Nil:      break;
+    case DN_OSWindowShow_Restore:  ShowWindow(DN_Cast(HWND)window->handle, SW_RESTORE); break;
+    case DN_OSWindowShow_Minimise: ShowWindow(DN_Cast(HWND)window->handle, SW_MINIMIZE); break;
+    case DN_OSWindowShow_Maximise: ShowWindow(DN_Cast(HWND)window->handle, SW_MAXIMIZE); break;
+  }
+}
+
+DN_API void DN_OS_WindowBringToFront(DN_OSWindow *window)
+{
+  HWND hwnd = window ? DN_Cast(HWND)window->handle : nullptr;
+  if (hwnd)
+    BringWindowToTop(hwnd);
+}
+
+DN_API void DN_OS_WindowFocus(DN_OSWindow *window)
+{
+  HWND hwnd = window ? DN_Cast(HWND)window->handle : nullptr;
+  if (hwnd) {
+    SetForegroundWindow(hwnd);
+    SetFocus(hwnd);
+  }
+}
+
+DN_API bool DN_OS_WindowIsFocused(DN_OSWindow *window)
+{
+  bool result = false;
+  HWND hwnd   = window ? DN_Cast(HWND) window->handle : nullptr;
+  if (hwnd)
+    result = hwnd == GetForegroundWindow();
+  return result;
+}
+
 static DWORD __stdcall DN_OS_ThreadFunc_(void *user_context)
 {
   DN_OS_ThreadExecute_(user_context);

Source/OS/dn_os_windows.h

@@ -674,9 +674,11 @@
 
   #define SW_HIDE           0
   #define SW_NORMAL         1
+  #define SW_SHOWNORMAL     1
   #define SW_MAXIMIZE       3
   #define SW_SHOWNOACTIVATE 4
   #define SW_SHOW           5
+  #define SW_RESTORE        9
   #define SW_FORCEMINIMIZE  11
 
   extern "C"
@@ -686,7 +688,12 @@
   __declspec(dllimport) UINT __stdcall GetWindowModuleFileNameA(HWND hwnd, LPSTR pszFileName, UINT cchFileNameMax);
   __declspec(dllimport) BOOL __stdcall ShowWindow              (HWND hWnd, int nCmdShow);
   __declspec(dllimport) BOOL __stdcall GetWindowPlacement      (HWND hWnd, WINDOWPLACEMENT *lpwndpl);
-
+  __declspec(dllimport) BOOL __stdcall IsIconic                (HWND hWnd);
+  __declspec(dllimport) BOOL __stdcall BringWindowToTop        (HWND hWnd);
+  __declspec(dllimport) BOOL __stdcall SetForegroundWindow     (HWND hWnd);
+  __declspec(dllimport) HWND __stdcall SetFocus                (HWND hWnd);
+  __declspec(dllimport) HWND __stdcall GetForegroundWindow     ();
+  __declspec(dllimport) BOOL __stdcall SetWindowTextW          (HWND hWnd, LPCWSTR lpString);
   }
 
   // NOTE: um/wininet.h //////////////////////////////////////////////////////////////////////////
@@ -1188,7 +1195,6 @@
   // NOTE: um/shellapi.h /////////////////////////////////////////////////////////////////////////
   extern "C"
   {
-  __declspec(dllimport) HINSTANCE __stdcall ShellExecuteA(HWND hwnd, CHAR const *lpOperation, CHAR const *lpFile, CHAR const *lpParameters, CHAR const *lpDirectory, INT nShowCmd);
   __declspec(dllimport) HINSTANCE __stdcall ShellExecuteW(HWND hwnd, WCHAR const *lpOperation, WCHAR const *lpFile, WCHAR const *lpParameters, WCHAR const *lpDirectory, INT nShowCmd);
   }