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c199edda45
Improve debuggability. Fix "WorkerW" window class conflict. - Enable _DEBUG macro if debugging, in order to enable ATLASSERT macro. - Fix assertion failures. - Add SHCreateDefaultWorkerWindow helper function and CWorkerTraits, then use them. - Don't create the broker and server windows by themselves, but subclass. CORE-17505, CORE-13950
104 lines
4.1 KiB
C
104 lines
4.1 KiB
C
/*
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* PROJECT: shell32
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* LICENSE: LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
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* PURPOSE: Shell change notification
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* COPYRIGHT: Copyright 2020 Katayama Hirofumi MZ (katayama.hirofumi.mz@gmail.com)
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*/
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#pragma once
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#include <shlwapi_undoc.h> // for SHCreateWorkerWindowW
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/////////////////////////////////////////////////////////////////////////////
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// CChangeNotifyServer is a delivery worker window that is managed by CDesktopBrowser.
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// The process of CChangeNotifyServer is same as the process of CDesktopBrowser.
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// The caller process of SHChangeNotify function might be different from the
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// process of CChangeNotifyServer.
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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// The shared memory block can be allocated by shlwapi!SHAllocShared function.
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//
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// HANDLE SHAllocShared(LPCVOID lpData, DWORD dwSize, DWORD dwProcessId);
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// LPVOID SHLockShared(HANDLE hData, DWORD dwProcessId);
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// LPVOID SHLockSharedEx(HANDLE hData, DWORD dwProcessId, BOOL bWriteAccess);
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// BOOL SHUnlockShared(LPVOID lpData);
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// BOOL SHFreeShared(HANDLE hData, DWORD dwProcessId);
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//
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// The shared memory block is managed by the pair of a HANDLE value and an owner PID.
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// If the pair is known, it can be accessed by SHLockShared(Ex) function
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// from another process.
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/////////////////////////////////////////////////////////////////////////////
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#define INVALID_REG_ID 0 /* invalid registration ID */
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// This message is handled by CDesktopBrowser and returns
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// the window of CChangeNotifyServer which responds to the CN_* messages
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#define WM_DESKTOP_GET_CNOTIFY_SERVER (WM_USER + 25) /* 0x419 */
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// The following messages are implemented by CChangeNotifyServer
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// CChangeNotifyServer lives in the context of explorer and delivers notifications
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// across all processes that register themselves with the SHChangeNotifyRegister api
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#define CN_REGISTER (WM_USER + 1) /* 0x401 */
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#define CN_UNREGISTER (WM_USER + 2) /* 0x402 */
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#define CN_DELIVER_NOTIFICATION (WM_USER + 3) /* 0x403 */
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#define CN_SUSPEND_RESUME (WM_USER + 6) /* 0x406 */
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#define CN_UNREGISTER_PROCESS (WM_USER + 7) /* 0x407 */
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// This message is implemented by the broker window which lives in the context of the client
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#define WM_BROKER_NOTIFICATION (WM_USER + 1) /* 0x401 */
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#define DWORD_ALIGNMENT(offset) \
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((((offset) + sizeof(DWORD) - 1) / sizeof(DWORD)) * sizeof(DWORD))
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/* delivery ticket */
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typedef struct DELITICKET
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{
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DWORD dwMagic; /* same as DELITICKET_MAGIC */
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LONG wEventId; /* event id of SHChangeNotify() */
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UINT uFlags; /* flags of SHChangeNotify() */
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DWORD dwTick; /* value of GetTickCount() */
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DWORD ibOffset1; /* offset to pidl1 */
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DWORD ibOffset2; /* offset to pidl2 */
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/* followed by pidl1 and pidl2 */
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} DELITICKET, *LPDELITICKET;
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/* registration entry */
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typedef struct REGENTRY
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{
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DWORD dwMagic; /* same as REGENTRY_MAGIC */
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DWORD cbSize; /* the real size of this structure */
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UINT nRegID; /* the registration ID */
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HWND hwnd; /* the target window */
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UINT uMsg; /* the message ID used in notification */
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INT fSources; /* the source flags */
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LONG fEvents; /* the event flags */
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BOOL fRecursive; /* is it recursive? */
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HWND hwndBroker; /* broker window (if any) */
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UINT ibPidl; /* offset to the PIDL */
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/* followed by a PIDL */
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} REGENTRY, *LPREGENTRY;
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/* handbag */
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typedef struct HANDBAG
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{
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DWORD dwMagic; /* same as HANDBAG_MAGIC */
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LPITEMIDLIST pidls[2]; /* two PIDLs */
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LPDELITICKET pTicket; /* the ticket */
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} HANDBAG, *LPHANDBAG;
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#define DELITICKET_MAGIC 0xDEADFACE
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#define REGENTRY_MAGIC 0xB0B32D1E
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#define HANDBAG_MAGIC 0xFACEB00C
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HRESULT CChangeNotifyServer_CreateInstance(REFIID riid, void **ppv);
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#define WORKER_STYLE (WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN)
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#define WORKER_EXSTYLE WS_EX_TOOLWINDOW
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typedef CWinTraits<WORKER_STYLE, WORKER_EXSTYLE> CWorkerTraits;
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inline HWND SHCreateDefaultWorkerWindow(VOID)
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{
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return SHCreateWorkerWindowW(NULL, NULL, WORKER_EXSTYLE, WORKER_STYLE, NULL, 0);
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}
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