mirror of
https://github.com/reactos/reactos.git
synced 2024-07-08 21:55:08 +00:00
Cleanup in desktopbg.c, inspired by BeastL (slyhome|AT|ipnet|DOT|ua), bug #4985.
svn path=/trunk/; revision=44474
This commit is contained in:
Dmitry Gorbachev
parent
b1e100ebd8
commit
ae89fc3761
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@ -8,6 +8,7 @@
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*/
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#define NDEBUG
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#include "w32csr.h"
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#include <debug.h>
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@ -18,283 +19,302 @@
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typedef struct tagDTBG_THREAD_DATA
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{
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HDESK Desktop;
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HANDLE Event;
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NTSTATUS Status;
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HDESK Desktop;
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HANDLE Event;
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NTSTATUS Status;
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} DTBG_THREAD_DATA, *PDTBG_THREAD_DATA;
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typedef struct tagPRIVATE_NOTIFY_DESKTOP
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{
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NMHDR hdr;
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union
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{
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NMHDR hdr;
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struct /* PM_SHOW_DESKTOP */
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{
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int Width;
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int Height;
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int Width;
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int Height;
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} ShowDesktop;
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};
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} PRIVATE_NOTIFY_DESKTOP, *PPRIVATE_NOTIFY_DESKTOP;
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static BOOL BgInitialized = FALSE;
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static HWND VisibleDesktopWindow = NULL;
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static LRESULT CALLBACK
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DtbgWindowProc(HWND Wnd, UINT Msg, WPARAM wParam, LPARAM lParam)
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static
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LRESULT
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CALLBACK
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DtbgWindowProc(HWND Wnd,
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UINT Msg,
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WPARAM wParam,
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LPARAM lParam)
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{
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PAINTSTRUCT PS;
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HDC hDC;
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PAINTSTRUCT PS;
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switch(Msg)
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switch (Msg)
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{
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case WM_ERASEBKGND:
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PaintDesktop((HDC)wParam);
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return 1;
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case WM_ERASEBKGND:
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PaintDesktop((HDC)wParam);
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return 1;
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case WM_PAINT:
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{
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if((hDC = BeginPaint(Wnd, &PS)))
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EndPaint(Wnd, &PS);
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return 0;
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}
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case WM_SETCURSOR:
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return (LRESULT) SetCursor(LoadCursorW(0, (LPCWSTR)IDC_ARROW));
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case WM_NCCREATE:
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return (LRESULT) TRUE;
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case WM_CREATE:
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return 0;
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case WM_CLOSE:
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return 0;
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case WM_NOTIFY:
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{
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PPRIVATE_NOTIFY_DESKTOP nmh = (PPRIVATE_NOTIFY_DESKTOP)lParam;
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/* Use WM_NOTIFY for private messages since it can't be sent between
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processes! */
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switch(nmh->hdr.code)
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{
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case PM_SHOW_DESKTOP:
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{
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LRESULT Result;
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Result = ! SetWindowPos(Wnd,
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NULL, 0, 0,
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nmh->ShowDesktop.Width,
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nmh->ShowDesktop.Height,
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SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW);
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UpdateWindow(Wnd);
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VisibleDesktopWindow = Wnd;
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return Result;
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}
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case PM_HIDE_DESKTOP:
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{
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LRESULT Result;
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Result = ! SetWindowPos(Wnd,
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NULL, 0, 0, 0, 0,
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SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOMOVE | SWP_NOSIZE |
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SWP_HIDEWINDOW);
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UpdateWindow(Wnd);
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VisibleDesktopWindow = NULL;
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return Result;
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}
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default:
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DPRINT("Unknown notification code 0x%x sent to the desktop window!\n", nmh->hdr.code);
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case WM_PAINT:
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if (BeginPaint(Wnd, &PS))
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EndPaint(Wnd, &PS);
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return 0;
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case WM_SETCURSOR:
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return (LRESULT)SetCursor(LoadCursorW(0, (LPCWSTR)IDC_ARROW));
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case WM_NCCREATE:
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return (LRESULT)TRUE;
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case WM_CREATE:
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case WM_CLOSE:
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return 0;
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case WM_NOTIFY:
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{
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PPRIVATE_NOTIFY_DESKTOP nmh = (PPRIVATE_NOTIFY_DESKTOP)lParam;
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/* Use WM_NOTIFY for private messages since
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* it can't be sent between processes!
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*/
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switch (nmh->hdr.code)
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{
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case PM_SHOW_DESKTOP:
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{
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LRESULT Result;
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Result = !SetWindowPos(Wnd, NULL, 0, 0,
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nmh->ShowDesktop.Width,
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nmh->ShowDesktop.Height,
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SWP_NOACTIVATE | SWP_NOZORDER |
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SWP_SHOWWINDOW);
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UpdateWindow(Wnd);
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VisibleDesktopWindow = Wnd;
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return Result;
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}
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case PM_HIDE_DESKTOP:
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{
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LRESULT Result;
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Result = !SetWindowPos(Wnd, NULL, 0, 0, 0, 0,
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SWP_NOACTIVATE | SWP_NOZORDER |
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SWP_NOMOVE | SWP_NOSIZE | SWP_HIDEWINDOW);
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UpdateWindow(Wnd);
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VisibleDesktopWindow = NULL;
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return Result;
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}
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default:
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DPRINT("Unknown notification code 0x%x sent to the desktop window!\n",
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nmh->hdr.code);
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return 0;
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}
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}
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}
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default:
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return DefWindowProcW(Wnd, Msg, wParam, lParam);
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default:
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return DefWindowProcW(Wnd, Msg, wParam, lParam);
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}
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return 0;
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return 0;
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}
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static BOOL FASTCALL
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DtbgInit()
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static
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BOOL
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FASTCALL
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DtbgInit(VOID)
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{
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WNDCLASSEXW Class;
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ATOM ClassAtom;
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WNDCLASSEXW Class;
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ATOM ClassAtom;
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/*
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* Create the desktop window class
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*/
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Class.cbSize = sizeof(WNDCLASSEXW);
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Class.style = CS_GLOBALCLASS;
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Class.lpfnWndProc = DtbgWindowProc;
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Class.cbClsExtra = 0;
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Class.cbWndExtra = 0;
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Class.hInstance = (HINSTANCE) GetModuleHandleW(NULL);
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Class.hIcon = NULL;
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Class.hCursor = NULL;
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Class.hbrBackground = GetSysColorBrush(COLOR_BACKGROUND);
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Class.lpszMenuName = NULL;
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Class.lpszClassName = (LPCWSTR) DESKTOP_WINDOW_ATOM;
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ClassAtom = RegisterClassExW(&Class);
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if ((ATOM) 0 == ClassAtom)
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/*
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* Create the desktop window class
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*/
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Class.cbSize = sizeof(WNDCLASSEXW);
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Class.style = CS_GLOBALCLASS;
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Class.lpfnWndProc = DtbgWindowProc;
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Class.cbClsExtra = 0;
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Class.cbWndExtra = 0;
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Class.hInstance = (HINSTANCE)GetModuleHandleW(NULL);
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Class.hIcon = NULL;
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Class.hCursor = NULL;
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Class.hbrBackground = GetSysColorBrush(COLOR_BACKGROUND);
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Class.lpszMenuName = NULL;
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Class.lpszClassName = (LPCWSTR)DESKTOP_WINDOW_ATOM;
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ClassAtom = RegisterClassExW(&Class);
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if (ClassAtom == INVALID_ATOM)
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{
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DPRINT1("Unable to register desktop background class (error %d)\n",
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GetLastError());
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return FALSE;
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}
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VisibleDesktopWindow = NULL;
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DPRINT1("Unable to register desktop background class (error %d)\n",
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GetLastError());
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return TRUE;
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return FALSE;
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}
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VisibleDesktopWindow = NULL;
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return TRUE;
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}
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static DWORD WINAPI
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static
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DWORD
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WINAPI
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DtbgDesktopThread(PVOID Data)
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{
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HWND BackgroundWnd;
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MSG msg;
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PDTBG_THREAD_DATA ThreadData = (PDTBG_THREAD_DATA) Data;
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HWND BackgroundWnd;
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MSG msg;
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PDTBG_THREAD_DATA ThreadData = (PDTBG_THREAD_DATA)Data;
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if (! SetThreadDesktop(ThreadData->Desktop))
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if (!SetThreadDesktop(ThreadData->Desktop))
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{
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DPRINT1("Failed to set thread desktop\n");
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ThreadData->Status = STATUS_UNSUCCESSFUL;
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SetEvent(ThreadData->Event);
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return 1;
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}
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BackgroundWnd = CreateWindowW((LPCWSTR) DESKTOP_WINDOW_ATOM,
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L"",
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WS_POPUP | WS_CLIPCHILDREN,
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0,
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0,
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0,
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0,
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NULL,
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NULL,
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(HINSTANCE) GetModuleHandleW(NULL),
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NULL);
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if (NULL == BackgroundWnd)
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{
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DPRINT1("Failed to create desktop background window\n");
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ThreadData->Status = STATUS_UNSUCCESSFUL;
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SetEvent(ThreadData->Event);
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return 1;
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DPRINT1("Failed to set thread desktop\n");
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ThreadData->Status = STATUS_UNSUCCESSFUL;
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SetEvent(ThreadData->Event);
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return 1;
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}
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ThreadData->Status = STATUS_SUCCESS;
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SetEvent(ThreadData->Event);
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BackgroundWnd = CreateWindowW((LPCWSTR)DESKTOP_WINDOW_ATOM,
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L"",
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WS_POPUP | WS_CLIPCHILDREN,
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0, 0, 0, 0,
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NULL, NULL,
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(HINSTANCE)GetModuleHandleW(NULL),
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NULL);
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while (GetMessageW(&msg, NULL, 0, 0))
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if (NULL == BackgroundWnd)
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{
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TranslateMessage(&msg);
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DispatchMessageW(&msg);
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DPRINT1("Failed to create desktop background window\n");
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ThreadData->Status = STATUS_UNSUCCESSFUL;
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SetEvent(ThreadData->Event);
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return 1;
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}
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return 1;
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ThreadData->Status = STATUS_SUCCESS;
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SetEvent(ThreadData->Event);
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while (GetMessageW(&msg, NULL, 0, 0))
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{
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TranslateMessage(&msg);
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DispatchMessageW(&msg);
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}
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return 1;
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}
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CSR_API(CsrCreateDesktop)
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{
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DTBG_THREAD_DATA ThreadData;
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HANDLE ThreadHandle;
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DTBG_THREAD_DATA ThreadData;
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HANDLE ThreadHandle;
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DPRINT("CsrCreateDesktop\n");
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DPRINT("CsrCreateDesktop\n");
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Request->Header.u1.s1.TotalLength = sizeof(CSR_API_MESSAGE);
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Request->Header.u1.s1.DataLength = sizeof(CSR_API_MESSAGE) - sizeof(PORT_MESSAGE);
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Request->Header.u1.s1.TotalLength = sizeof(CSR_API_MESSAGE);
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Request->Header.u1.s1.DataLength = sizeof(CSR_API_MESSAGE) - sizeof(PORT_MESSAGE);
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if (! BgInitialized)
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if (!BgInitialized)
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{
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BgInitialized = TRUE;
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if (! DtbgInit())
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{
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return STATUS_UNSUCCESSFUL;
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}
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BgInitialized = TRUE;
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if (!DtbgInit())
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return STATUS_UNSUCCESSFUL;
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}
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/*
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* the desktop handle we got from win32k is in the scope of CSRSS so we can just use it
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*/
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ThreadData.Desktop = Request->Data.CreateDesktopRequest.DesktopHandle;
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/*
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* The desktop handle we got from win32k is in
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* the scope of CSRSS so we can just use it.
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*/
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ThreadData.Desktop = Request->Data.CreateDesktopRequest.DesktopHandle;
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ThreadData.Event = CreateEventW(NULL, FALSE, FALSE, NULL);
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if (NULL == ThreadData.Event)
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ThreadData.Event = CreateEventW(NULL, FALSE, FALSE, NULL);
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if (NULL == ThreadData.Event)
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{
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DPRINT1("Failed to create event (error %d)\n", GetLastError());
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return STATUS_UNSUCCESSFUL;
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DPRINT1("Failed to create event (error %d)\n", GetLastError());
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return STATUS_UNSUCCESSFUL;
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}
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ThreadHandle = CreateThread(NULL,
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0,
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DtbgDesktopThread,
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(PVOID) &ThreadData,
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0,
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NULL);
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if (NULL == ThreadHandle)
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ThreadHandle = CreateThread(NULL,
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0,
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DtbgDesktopThread,
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(PVOID)&ThreadData,
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0,
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NULL);
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if (NULL == ThreadHandle)
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{
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CloseHandle(ThreadData.Event);
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DPRINT1("Failed to create desktop window thread.\n");
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return STATUS_UNSUCCESSFUL;
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CloseHandle(ThreadData.Event);
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DPRINT1("Failed to create desktop window thread.\n");
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return STATUS_UNSUCCESSFUL;
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}
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CloseHandle(ThreadHandle);
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WaitForSingleObject(ThreadData.Event, INFINITE);
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CloseHandle(ThreadData.Event);
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CloseHandle(ThreadHandle);
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return ThreadData.Status;
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WaitForSingleObject(ThreadData.Event, INFINITE);
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CloseHandle(ThreadData.Event);
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return ThreadData.Status;
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}
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CSR_API(CsrShowDesktop)
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{
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PRIVATE_NOTIFY_DESKTOP nmh;
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DPRINT("CsrShowDesktop\n");
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PRIVATE_NOTIFY_DESKTOP nmh;
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DPRINT("CsrShowDesktop\n");
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Request->Header.u1.s1.TotalLength = sizeof(CSR_API_MESSAGE);
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Request->Header.u1.s1.DataLength = sizeof(CSR_API_MESSAGE) - sizeof(PORT_MESSAGE);
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Request->Header.u1.s1.TotalLength = sizeof(CSR_API_MESSAGE);
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Request->Header.u1.s1.DataLength = sizeof(CSR_API_MESSAGE) - sizeof(PORT_MESSAGE);
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nmh.hdr.hwndFrom = Request->Data.ShowDesktopRequest.DesktopWindow;
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nmh.hdr.idFrom = 0;
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nmh.hdr.code = PM_SHOW_DESKTOP;
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nmh.hdr.hwndFrom = Request->Data.ShowDesktopRequest.DesktopWindow;
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nmh.hdr.idFrom = 0;
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nmh.hdr.code = PM_SHOW_DESKTOP;
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nmh.ShowDesktop.Width = (int)Request->Data.ShowDesktopRequest.Width;
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nmh.ShowDesktop.Height = (int)Request->Data.ShowDesktopRequest.Height;
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nmh.ShowDesktop.Width = (int)Request->Data.ShowDesktopRequest.Width;
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nmh.ShowDesktop.Height = (int)Request->Data.ShowDesktopRequest.Height;
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return SendMessageW(Request->Data.ShowDesktopRequest.DesktopWindow,
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WM_NOTIFY,
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(WPARAM)nmh.hdr.hwndFrom,
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(LPARAM)&nmh)
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? STATUS_UNSUCCESSFUL : STATUS_SUCCESS;
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if (SendMessageW(Request->Data.ShowDesktopRequest.DesktopWindow,
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WM_NOTIFY,
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(WPARAM)nmh.hdr.hwndFrom,
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(LPARAM)&nmh))
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{
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return STATUS_UNSUCCESSFUL;
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}
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return STATUS_SUCCESS;
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}
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CSR_API(CsrHideDesktop)
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{
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PRIVATE_NOTIFY_DESKTOP nmh;
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DPRINT("CsrHideDesktop\n");
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PRIVATE_NOTIFY_DESKTOP nmh;
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DPRINT("CsrHideDesktop\n");
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Request->Header.u1.s1.TotalLength = sizeof(CSR_API_MESSAGE);
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Request->Header.u1.s1.DataLength = sizeof(CSR_API_MESSAGE) - sizeof(PORT_MESSAGE);
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Request->Header.u1.s1.TotalLength = sizeof(CSR_API_MESSAGE);
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Request->Header.u1.s1.DataLength = sizeof(CSR_API_MESSAGE) - sizeof(PORT_MESSAGE);
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nmh.hdr.hwndFrom = Request->Data.ShowDesktopRequest.DesktopWindow;
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nmh.hdr.idFrom = 0;
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nmh.hdr.code = PM_HIDE_DESKTOP;
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nmh.hdr.hwndFrom = Request->Data.ShowDesktopRequest.DesktopWindow;
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nmh.hdr.idFrom = 0;
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nmh.hdr.code = PM_HIDE_DESKTOP;
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return SendMessageW(Request->Data.ShowDesktopRequest.DesktopWindow,
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WM_NOTIFY,
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(WPARAM)nmh.hdr.hwndFrom,
|
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(LPARAM)&nmh)
|
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? STATUS_UNSUCCESSFUL : STATUS_SUCCESS;
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}
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BOOL FASTCALL
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DtbgIsDesktopVisible(VOID)
|
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{
|
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if (NULL != VisibleDesktopWindow && ! IsWindowVisible(VisibleDesktopWindow))
|
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if (SendMessageW(Request->Data.ShowDesktopRequest.DesktopWindow,
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WM_NOTIFY,
|
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(WPARAM)nmh.hdr.hwndFrom,
|
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(LPARAM)&nmh))
|
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{
|
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VisibleDesktopWindow = NULL;
|
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return STATUS_UNSUCCESSFUL;
|
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}
|
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|
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return NULL != VisibleDesktopWindow;
|
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return STATUS_SUCCESS;
|
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}
|
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|
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BOOL
|
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FASTCALL
|
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DtbgIsDesktopVisible(VOID)
|
||||
{
|
||||
if (VisibleDesktopWindow != NULL &&
|
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!IsWindowVisible(VisibleDesktopWindow))
|
||||
{
|
||||
VisibleDesktopWindow = NULL;
|
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}
|
||||
|
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return VisibleDesktopWindow != NULL;
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}
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||||
|
||||
/* EOF */
|
||||
|
|
|
|||
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Reference in a new issue