349 lines
15 KiB
C
349 lines
15 KiB
C
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/* Copyright 1996 Microsoft */
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#ifndef _AUTOCOMP_HPP_
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#define _AUTOCOMP_HPP_
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#include "accdel.h"
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// TODO List:
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// 1. Convert AutoComplete to be a Free Threaded object and move it and all it's
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// lists into MultiApartment model.
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// 2. Get thread out of ThreadPool API in shlwapi.dll instead of creating thead our
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// selves.
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// 3. See if SHWaitForSendMessageThread() will cause a lock if bg thread is in SendMessage().
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// If so, make sure the bg loop's hard loop doesn't call SendMessage() in this case without
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// first looking for QUIT message.
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// WARNING On Usage:
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// This object is marked Apartment model and this abuses COM. These are rules
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// that need to be followed to prevent bugs. This object will be used within three scopes.
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// The first scope is the caller doing: 1a) CoInitialize(), 1b) CoCreateInstance().
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// 1c) p->Init(), 1d) p->Release(), 1e) CoUninitialize().
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// The second scope is the object doing: 2a) Subclass();AddRef(), 2b) WM_DESTROY;Release();
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// 1c) p->Init(), 1d) p->Release(), 1e) CoUninitialize().
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// The third scope is the background thread doing: 3a) (in thread proc) CoInitialize(),
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// 3b) CoUninitialize().
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// This object requires that 1E come after 2B and that should be the only requirement
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// for the use of this object.
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//
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// PRIVATE
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//
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#define AC_LIST_GROWTH_CONST 50
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const WCHAR CH_WILDCARD = L'\1'; // indicates a wildcard search
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//
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// Debug Flags
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//
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#define AC_WARNING TF_WARNING + TF_AUTOCOMPLETE
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#define AC_ERROR TF_ERROR + TF_AUTOCOMPLETE
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#define AC_GENERAL TF_GENERAL + TF_AUTOCOMPLETE
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#define AC_FUNC TF_FUNC + TF_AUTOCOMPLETE
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// Enable test regkey
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#define ALLOW_ALWAYS_DROP_UP
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//
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// WndProc messages to the dropdown window
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//
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enum
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{
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AM_BUTTONCLICK = WM_APP + 400,
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AM_UPDATESCROLLPOS,
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AM_DESTROY
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};
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//
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// Flags passed from background thread when the search is completed
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enum
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{
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SRCH_LIMITREACHED = 0x01, // out of memory or we reached our limit
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SRCH_USESORTINDEX = 0x02, // use sort index to order results
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};
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#define ACO_UNINITIALIZED 0x80000000 // if autocomplete options have not been initialized
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//
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// PUBLIC
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//
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HRESULT SHUseDefaultAutoComplete(HWND hwndEdit,
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IBrowserService * pbs, IN OPTIONAL
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IAutoComplete2 ** ppac, OUT OPTIONAL
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IShellService ** ppssACLISF, OUT OPTIONAL
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BOOL fUseCMDMRU);
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// Forward references
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class CAutoComplete;
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class CACString* CreateACString(LPCWSTR pszStr);
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//+-------------------------------------------------------------------------
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// CACString - Autocomplete string shared by foreground & background threads
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//--------------------------------------------------------------------------
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class CACString
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{
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public:
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ULONG AddRef();
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ULONG Release();
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ULONG GetSortIndex() { return m_ulSortIndex; }
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void SetSortIndex(ULONG ulIndex) { m_ulSortIndex = ulIndex; }
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LPCWSTR GetStr() const { return m_sz; }
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LPCWSTR GetStrToCompare() const { return m_sz + m_iIgnore; }
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int GetLength() const { return m_cChars; }
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int GetLengthToCompare() const { return m_cChars - m_iIgnore; }
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const WCHAR& operator [] (int nIndex) const { return m_sz[nIndex]; }
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operator LPCWSTR() { return m_sz; }
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BOOL HasPrefix() { return m_iIgnore; }
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BOOL PrefixLength() { return m_iIgnore; }
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// Note, the following compare functions ignore the prefix of the CACString
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int CompareSortingIndex(CACString& r);
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int StrCmpI(LPCWSTR psz) { return ::StrCmpI(m_sz + m_iIgnore, psz); }
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int StrCmpI(CACString& r) { return ::StrCmpI(m_sz + m_iIgnore, r.m_sz + r.m_iIgnore); }
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int StrCmpNI(LPCWSTR psz, int cch) { return ::StrCmpNI(m_sz + m_iIgnore, psz, cch); }
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protected:
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friend CACString* CreateACString(LPCWSTR pszStr, int iIgnore, ULONG ulSortIndex);
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// Prevent creation on stack
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CACString();
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LONG m_cRef; // reference count
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int m_cChars; // length of string (excluding null)
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int m_iIgnore; // # prefix characters to ignore when comparing strings
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ULONG m_ulSortIndex; // can be used instead of default alphabetical sorting
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WCHAR m_sz[1]; // first character of the string
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};
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//+-------------------------------------------------------------------------
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// CACThread - Autocomplete thread that runs in the background
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//--------------------------------------------------------------------------
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class CACThread : public IUnknown
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{
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public:
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// *** IUnknown ***
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virtual STDMETHODIMP_(ULONG) AddRef();
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virtual STDMETHODIMP_(ULONG) Release();
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virtual STDMETHODIMP QueryInterface(REFIID riid, LPVOID * ppvObj);
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CACThread(CAutoComplete& rAutoComp);
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virtual ~CACThread();
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BOOL Init(IEnumString* pes, IACList* pacl);
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void GotFocus();
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void LostFocus();
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BOOL HasFocus() { return m_fWorkItemQueued != 0; }
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BOOL StartSearch(LPCWSTR pszSearch, DWORD dwOptions);
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void StopSearch();
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void SyncShutDownBGThread();
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BOOL IsDisabled() { return m_fDisabled; }
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// Helper functions
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static BOOL MatchesSpecialPrefix(LPCWSTR pszSearch);
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static int GetSpecialPrefixLen(LPCWSTR psz);
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protected:
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LONG m_cRef;
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CAutoComplete* m_pAutoComp; // portion of autocomplete that runs on main thread
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LONG m_fWorkItemQueued; // if request made to shlwapi thread pool
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LONG m_idThread;
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HANDLE m_hCreateEvent; // thread startup syncronizatrion
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BOOL m_fDisabled:1; // is autocomplete disabled?
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LPWSTR m_pszSearch; // String we are currently searching for
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HDPA m_hdpa_list; // list of completions
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DWORD m_dwSearchStatus;// see SRCH_* flags
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IEnumString* m_pes; // Used internally for real AutoComplete functionality.
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IEnumACString* m_peac; // Used with IEnumString to get sort index
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IACList* m_pacl; // Additional methods for autocomplete lists (optional).
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void _SendAsyncShutDownMsg(BOOL fFinalShutDown);
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void _FreeThreadData();
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HRESULT _ThreadLoop();
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HRESULT _Next(LPWSTR szUrl, ULONG cchUrl, ULONG* pulSortIndex);
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HRESULT _ProcessMessage(MSG * pMsg, DWORD * pdwTimeout, BOOL * pfStayAlive);
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void _Search(LPWSTR pszSearch, DWORD dwOptions);
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BOOL _AddToList(LPTSTR pszUrl, int cchMatch, ULONG ulSortIndex);
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void _DoExpand(LPCWSTR pszSearch);
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static DWORD WINAPI _ThreadProc(LPVOID lpv);
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static int CALLBACK _DpaCompare(LPVOID p1, LPVOID p2, LPARAM lParam);
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};
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//+-------------------------------------------------------------------------
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// CAutoComplete - Main autocomplete class that runs on the main UI thread
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//--------------------------------------------------------------------------
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class CAutoComplete
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: public IAutoComplete2
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, public IAutoCompleteDropDown
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, public IEnumString
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, public CDelegateAccessibleImpl
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{
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public:
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//////////////////////////////////////////////////////
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// Public Interfaces
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//////////////////////////////////////////////////////
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// *** IUnknown ***
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virtual STDMETHODIMP_(ULONG) AddRef();
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virtual STDMETHODIMP_(ULONG) Release();
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virtual STDMETHODIMP QueryInterface(REFIID riid, LPVOID * ppvObj);
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// *** IEnumString ***
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virtual STDMETHODIMP Next(ULONG celt, LPOLESTR *rgelt, ULONG *pceltFetched);
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virtual STDMETHODIMP Skip(ULONG celt) { return E_NOTIMPL; }
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virtual STDMETHODIMP Reset();
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virtual STDMETHODIMP Clone(IEnumString **ppenum) { return E_NOTIMPL; }
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// *** IAutoComplete ***
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virtual STDMETHODIMP Init(HWND hwnd, IUnknown *punkACL, LPCOLESTR pwszRegKeyPath, LPCOLESTR pwszQuickCompleteString);
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virtual STDMETHODIMP Enable(BOOL fEnable);
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// *** IAutoComplete2 ***
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virtual STDMETHODIMP SetOptions(DWORD dwFlag);
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virtual STDMETHODIMP GetOptions(DWORD* pdwFlag);
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// *** IAutoCompleteDropDown ***
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virtual STDMETHODIMP GetDropDownStatus(DWORD *pdwFlags, LPWSTR *ppwszString);
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virtual STDMETHODIMP ResetEnumerator();
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// *** IAccessible ***
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STDMETHODIMP get_accName(VARIANT varChild, BSTR *pszName);
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protected:
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// Methods called by the background thread
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friend CACThread;
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void SearchComplete(HDPA hdpa, DWORD dwSearchStatus) { PostMessage(m_hwndEdit, m_uMsgSearchComplete, dwSearchStatus, (LPARAM)hdpa); }
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BOOL IsEnabled();
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// Constructor / Destructor (protected so we can't create on stack)
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CAutoComplete();
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virtual ~CAutoComplete();
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// Instance creator
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friend HRESULT CAutoComplete_CreateInstance(IUnknown* pUnkOuter, IUnknown** ppunk, LPCOBJECTINFO poi);
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BOOL _Init();
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// Private variables
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LONG m_cRef;
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CACThread* m_pThread; // background autocomplete thread
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TCHAR m_szQuickComplete[MAX_PATH];
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TCHAR m_szRegKeyPath[MAX_PATH];
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DWORD m_dwFlags;
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HWND m_hwndEdit;
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HWND m_hwndCombo; // if m_hwndEdit is part of a combobox
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HFONT m_hfontListView;
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LPTSTR m_pszCurrent;
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int m_iCurrent;
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DWORD m_dwLastSearchFlags;
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WNDPROC m_pOldListViewWndProc;
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IEnumString * m_pes; // Used internally for real AutoComplete functionality.
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IACList * m_pacl; // Additional methods for autocomplete lists (optional).
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HDPA m_hdpa; // sorted completions list
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HDPA m_hdpaSortIndex; // matches from m_hdpa ordered by sort index
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LPWSTR m_pszLastSearch; // string last sent for completion
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int m_iFirstMatch; // first match in list (-1 if no matches)
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int m_iLastMatch; // last match in list (-1 if no matches)
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int m_iAppended; // item completed in the edit box
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BITBOOL m_fEditControlUnicode:1; // if the edit control is unicode.
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BITBOOL m_fNeedNewList:1; // last search was truncated
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BITBOOL m_fDropDownResized:1; // user has resized drop down
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BITBOOL m_fAppended:1; // if something currently appended
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BITBOOL m_fSearchForAdded:1; // if last item in dpa is "Search for <>"
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BITBOOL m_fSearchFor:1; // if "Search for <>" is to be displayed
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BITBOOL m_fImeCandidateOpen:1; // if the IME's candidate window is visible
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DWORD m_dwOptions; // autocomplete options (ACO_*)
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EDITWORDBREAKPROC m_oldEditWordBreakProc; // original word break proc for m_hwndEdit
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// Member variables for drop-down auto-suggest window
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HWND m_hwndDropDown; // Shows completions in drop-down window
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HWND m_hwndList; // Shows completions in drop-down window
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HWND m_hwndScroll; // scrollbar
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HWND m_hwndGrip; // gripper for resizing the dropdown
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int m_nStatusHeight; // height of status in drop-down
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int m_nDropWidth; // width of drop-down window
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int m_nDropHeight; // height of drop-down window
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int m_cxGripper; // width/height of gripper
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BITBOOL m_fDroppedUp:1; // if dropdown is over top the edit box
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#ifdef ALLOW_ALWAYS_DROP_UP
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BITBOOL m_fAlwaysDropUp:1; // TEST regkey to always drop up
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#endif
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BITBOOL m_fSettingText:1; // if setting the edit text
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BITBOOL m_fInHotTracking:1; // if new selection is due to hot-tracking
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// Member Variables used for external IEnumString
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IEnumString * m_pesExtern; // Used internally for real AutoComplete functionality.
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LPTSTR m_szEnumString;
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// Registered messages sent to edit window
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UINT m_uMsgSearchComplete;
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UINT m_uMsgItemActivate;
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static HHOOK s_hhookMouse; // windows hook installed when drop-down visible
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static HWND s_hwndDropDown; // dropdown currently visible
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static BOOL s_fNoActivate; // keep topmost-window from losing activation
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void _OnSearchComplete(HDPA hdpa, DWORD dwSearchStatus);
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BOOL _GetItem(int iIndex, LPWSTR pswText, int cchMax, BOOL fDisplayName);
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void _UpdateCompletion(LPCWSTR pszTyped, int iChanged, BOOL fAppend);
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void _HideDropDown();
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void _ShowDropDown();
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void _PositionDropDown();
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void _SeeWhatsEnabled();
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BOOL _IsAutoSuggestEnabled() { return m_dwOptions & ACO_AUTOSUGGEST; }
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BOOL _IsRTLReadingEnabled() { return m_dwOptions & ACO_RTLREADING; }
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BOOL _IsAutoAppendEnabled() { return (m_dwOptions & ACO_AUTOAPPEND) || (m_dwOptions & ACO_UNINITIALIZED); }
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BOOL _IsComboboxDropped() { return (m_hwndCombo && ComboBox_GetDroppedState(m_hwndCombo)); }
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void _UpdateGrip();
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void _UpdateScrollbar();
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static BOOL _IsWhack(TCHAR ch);
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static BOOL _IsBreakChar(WCHAR wch);
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BOOL _WantToAppendResults();
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int _JumpToNextBreak(int iLoc, DWORD dwFlags);
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BOOL _CursorMovement(WPARAM wParam);
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void _RemoveCompletion();
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void _GetEditText();
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void _SetEditText(LPCWSTR psz);
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void _UpdateText(int iStartSel, int iEndSel, LPCTSTR pszCurrent, LPCTSTR pszNew);
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BOOL _OnKeyDown(WPARAM wParam);
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LRESULT _OnChar(WPARAM wParam, LPARAM lParam);
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void _StartCompletion(BOOL fAppend, BOOL fEvenIfEmpty = FALSE);
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BOOL _StartSearch(LPCWSTR pszSearch);
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void _StopSearch();
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BOOL _ResetSearch();
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void _GotFocus();
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LPTSTR _QuickEnter();
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BOOL _AppendNext(BOOL fAppendToWhack);
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BOOL _AppendPrevious(BOOL fAppendToWhack);
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void _Append(CACString& rStr, BOOL fAppendToWhack);
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BOOL _SetQuickCompleteStrings(LPCOLESTR pcszRegKeyPath, LPCOLESTR pcszQuickCompleteString);
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void _SubClassParent(HWND hwnd);
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void _UnSubClassParent(HWND hwnd);
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LRESULT _DropDownWndProc(UINT uMsg, WPARAM wParam, LPARAM lParam);
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LRESULT _EditWndProc(UINT uMsg, WPARAM wParam, LPARAM lParam);
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LRESULT _ListViewWndProc(UINT uMsg, WPARAM wParam, LPARAM lParam);
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void _DropDownDrawItem(LPDRAWITEMSTRUCT pdis);
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BOOL _DropDownNotify(LPNMHDR pnmhdr);
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static int _DPADestroyCallback(LPVOID p, LPVOID d);
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static void _FreeDPAPtrs(HDPA hdpa);
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static int CALLBACK _DPACompareSortIndex(LPVOID p1, LPVOID p2, LPARAM lParam);
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static int CALLBACK EditWordBreakProcW(LPWSTR lpch, int ichCurrent, int cch, int code);
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static LRESULT CALLBACK s_EditWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData);
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static LRESULT CALLBACK s_DropDownWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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static LRESULT CALLBACK s_ListViewWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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static LRESULT CALLBACK s_ParentWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData);
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static LRESULT CALLBACK s_GripperWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData);
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static LRESULT CALLBACK s_MouseHook(int nCode, WPARAM wParam, LPARAM lParam);
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};
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#endif
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