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windows-nt/Source/XPSP1/NT/windows/richedit/re41/host.cpp
CryptoAlgo Inc b3cac27891 Add source files
2020-09-26 16:20:57 +08:00

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/*
* @doc INTERNAL
*
* @module HOST.C -- Text Host for CreateWindow() Rich Edit Control |
* Implements CTxtWinHost message and ITextHost interfaces
*
* Original Author: <nl>
* Original RichEdit code: David R. Fulmer
* Christian Fortini
* Murray Sargent
*
* History: <nl>
* 8/1/95 ricksa Documented and brought to new ITextHost definition
* 10/28/95 murrays cleaned up and moved default char/paraformat cache
* cache code into text services
*
* Set tabs every four (4) columns
*
* Copyright (c) 1995-2000 Microsoft Corporation. All rights reserved.
*/
#include "_common.h"
#include "_host.h"
#include "imm.h"
#include "_format.h"
#include "_edit.h"
#include "_cfpf.h"
#ifndef NOWINDOWHOSTS
ASSERTDATA
CTxtWinHost *g_phostdel = NULL;
#define EN_CLIPFORMAT 0x0712
#define ENM_CLIPFORMAT 0x00000080
void DeleteDanglingHosts()
{
CLock lock;
CTxtWinHost *phostdel = g_phostdel;
while(phostdel)
{
CTxtWinHost *phost = phostdel;
phostdel = phostdel->_pnextdel;
CTxtWinHost::OnNCDestroy(phost);
}
g_phostdel = NULL;
}
#ifndef NOANSIWINDOWS
//////////////////////////// System Window Procs ////////////////////////////
LRESULT CreateAnsiWindow(
HWND hwnd,
UINT msg,
CREATESTRUCTA *pcsa,
BOOL fIs10)
{
AssertSz((WM_CREATE == msg) || (WM_NCCREATE == msg),
"CreateAnsiWindow called with invalid message!");
CTxtWinHost *phost = (CTxtWinHost *) GetWindowLongPtr(hwnd, ibPed);
// The only thing we need to convert are the strings,
// so just do a structure copy and replace the strings.
CREATESTRUCTW csw = *(CREATESTRUCTW *)pcsa;
CStrInW strinwName(pcsa->lpszName, GetKeyboardCodePage());
CStrInW strinwClass(pcsa->lpszClass, CP_ACP);
csw.lpszName = (WCHAR *)strinwName;
csw.lpszClass = (WCHAR *)strinwClass;
if (!phost)
{
// No host yet so create it
phost = CTxtWinHost::OnNCCreate(hwnd, &csw, TRUE, fIs10);
}
if (WM_NCCREATE == msg)
{
return phost != NULL;
}
if (NULL == phost)
{
// For WM_CREATE -1 indicates failure
return -1;
}
// Do the stuff specific to create
return phost->OnCreate(&csw);
}
extern "C" LRESULT CALLBACK RichEdit10ANSIWndProc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
TRACEBEGINPARAM(TRCSUBSYSHOST, TRCSCOPEINTERN, "RichEdit10ANSIWndProc", msg);
if ((WM_CREATE == msg) || (WM_NCCREATE == msg))
{
return CreateAnsiWindow(hwnd, msg, (CREATESTRUCTA *) lparam, TRUE);
}
// ignore WM_DESTROY and wait for WM_NCDESTROY
if (WM_DESTROY == msg)
{
#ifndef NOWINDOWHOSTS
CLock lock;
CTxtWinHost *phost = (CTxtWinHost *) GetWindowLongPtr(hwnd, ibPed);
phost->_pnextdel = g_phostdel;
g_phostdel = phost;
#endif
return 0;
}
if (WM_NCDESTROY == msg)
msg = WM_DESTROY;
return W32->ANSIWndProc( hwnd, msg, wparam, lparam, TRUE);
}
LRESULT CALLBACK RichEditANSIWndProc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
TRACEBEGINPARAM(TRCSUBSYSHOST, TRCSCOPEINTERN, "RichEditANSIWndProc", msg);
if ((WM_CREATE == msg) || (WM_NCCREATE == msg))
{
return CreateAnsiWindow(hwnd, msg, (CREATESTRUCTA *) lparam, FALSE);
}
return W32->ANSIWndProc( hwnd, msg, wparam, lparam, FALSE);
}
#else // NOANSIWINDOWS
extern "C" LRESULT CALLBACK RichEdit10ANSIWndProc(
HWND ,
UINT ,
WPARAM ,
LPARAM)
{
return 0;
}
LRESULT CALLBACK RichEditANSIWndProc(
HWND ,
UINT ,
WPARAM ,
LPARAM)
{
return 0;
}
#endif // NOANSIWINDOWS
/*
* RichEditWndProc (hwnd, msg, wparam, lparam)
*
* @mfunc
* Handle window messages pertinent to the host and pass others on to
* text services.
*
* #rdesc
* LRESULT = (code processed) ? 0 : 1
*/
LRESULT CALLBACK RichEditWndProc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "RichEditWndProc");
LRESULT lres = 0;
HRESULT hr;
SETTEXTEX st;
CTxtWinHost *phost = hwnd ? (CTxtWinHost *) GetWindowLongPtr(hwnd, ibPed) : NULL;
#ifdef DEBUG
Tracef(TRCSEVINFO, "hwnd %lx, msg %lx, wparam %lx, lparam %lx", hwnd, msg, wparam, lparam);
#endif // DEBUG
switch(msg)
{
#ifdef WM_NCCREATE
case WM_NCCREATE:
return CTxtWinHost::OnNCCreate(hwnd, (CREATESTRUCT *)lparam, FALSE, FALSE) != NULL;
#endif
case WM_CREATE:
// We may be on a system with no WM_NCCREATE (e.g. WinCE)
if (!phost)
{
phost = CTxtWinHost::OnNCCreate(hwnd, (CREATESTRUCT *) lparam, FALSE, FALSE);
}
break;
case WM_DESTROY:
if(phost)
{
#ifndef NOWINDOWHOSTS
CLock lock;
CTxtWinHost *phostdel = g_phostdel;
if (phostdel == phost)
g_phostdel = phost->_pnextdel;
else
{
while (phostdel)
{
if (phostdel->_pnextdel == phost)
{
phostdel->_pnextdel = phost->_pnextdel;
break;
}
phostdel = phostdel->_pnextdel;
}
}
#endif
CTxtWinHost::OnNCDestroy(phost);
}
return 0;
}
if (!phost)
return ::DefWindowProc(hwnd, msg, wparam, lparam);
// In certain out-of-memory situations, clients may try to re-enter us
// with calls. Just bail on the call if we don't have a text services
// pointer.
if(!phost->_pserv)
return 0;
// stabilize ourselves
phost->AddRef();
// Handle mouse/keyboard/scroll message-filter notifications
if(phost->_fKeyMaskSet || phost->_fMouseMaskSet || phost->_fScrollMaskSet)
{
// We may need to fire a MSGFILTER notification. In the tests
// below, we check to see if mouse, keyboard, or scroll events
// are hit and enabled for notifications. If so, we fire the
// msgfilter notification. The list of events was generated
// from RichEdit 1.0 sources. The code gets all keyboard and
// mouse actions, whereas the RichEdit 1.0 code only got
// WM_KEYDOWN, WM_KEYUP, WM_CHAR, WM_SYSKEYDOWN, WM_SYSKEYUP,
// WM_MOUSEACTIVATE, WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MOUSEMOVE,
// WM_RBUTTONDBLCLK, WM_RBUTTONDOWN, WM_RBUTTONUP. Note that the
// following code doesn't send a notification for AltGr characters
// (LeftCtrl+RightAlt+vkey), since some hosts misinterpret these
// characters as hot keys.
if (phost->_fKeyMaskSet && IN_RANGE(WM_KEYFIRST, msg, WM_KEYLAST) &&
(msg != WM_KEYDOWN ||
(GetKeyboardFlags() & (ALT | CTRL)) != (LCTRL | RALT)) || // AltGr
phost->_fMouseMaskSet && (msg == WM_MOUSEACTIVATE ||
IN_RANGE(WM_MOUSEFIRST, msg, WM_MOUSELAST)) ||
phost->_fScrollMaskSet && IN_RANGE(WM_HSCROLL, msg, WM_VSCROLL))
{
MSGFILTER msgfltr;
ZeroMemory(&msgfltr.nmhdr, sizeof(NMHDR));
msgfltr.msg = msg;
msgfltr.wParam = wparam;
msgfltr.lParam = lparam;
// The MSDN document on MSGFILTER is wrong, if the
// send message returns 0 (NOERROR via TxNotify in this
// case), it means process the event. Otherwise, return.
//
// The documentation states the reverse.
//
if(phost->TxNotify(EN_MSGFILTER, &msgfltr) == NOERROR)
{
// Since client is allowed to modify the contents of
// msgfltr, we must use the returned values.
msg = msgfltr.msg;
wparam = msgfltr.wParam;
lparam = msgfltr.lParam;
}
else
{
lres = ::DefWindowProc(hwnd, msg, wparam, lparam);
goto Exit;
}
}
}
switch(msg)
{
case EM_SETEVENTMASK:
phost->_fKeyMaskSet = !!(lparam & ENM_KEYEVENTS);
phost->_fMouseMaskSet = !!(lparam & ENM_MOUSEEVENTS);
phost->_fScrollMaskSet = !!(lparam & ENM_SCROLLEVENTS);
goto serv;
case EM_SETSEL:
// When we are in a dialog box that is empty, EM_SETSEL will not select
// the final always existing EOP if the control is rich.
if (phost->_fUseSpecialSetSel &&
((CTxtEdit *)phost->_pserv)->GetAdjustedTextLength() == 0 &&
wparam != -1)
{
lparam = 0;
wparam = 0;
}
goto serv;
case WM_CREATE:
{
//bug fix #5386
//need to convert ANSI -> UNICODE for Win9x systems which didn't go through
//the ANSI wndProc
#ifndef NOANSIWINDOWS
if (W32->OnWin9x() && !phost->_fANSIwindow)
{
CREATESTRUCT cs = *(CREATESTRUCT*)lparam;
CStrInW strinwName(((CREATESTRUCTA*)lparam)->lpszName, GetKeyboardCodePage());
CStrInW strinwClass(((CREATESTRUCTA*)lparam)->lpszClass, CP_ACP);
cs.lpszName = (WCHAR*)strinwName;
cs.lpszClass = (WCHAR*)strinwClass;
lres = phost->OnCreate(&cs);
}
else
#endif
lres = phost->OnCreate((CREATESTRUCT*)lparam);
}
break;
case WM_KEYDOWN:
lres = phost->OnKeyDown((WORD) wparam, (DWORD) lparam);
if(lres) // Didn't process code:
goto serv; // give it to text services
break;
case WM_GETTEXT:
#ifndef NOANSIWINDOWS
GETTEXTEX gt;
if (W32->OnWin9x() || phost->_fANSIwindow)
W32->AnsiFilter( msg, wparam, lparam, (void *) &gt );
#endif
goto serv;
case WM_COPYDATA:
PCOPYDATASTRUCT pcds;
pcds = (PCOPYDATASTRUCT) lparam;
if (HIWORD(pcds->dwData) == 1200 && // Unicode code page
LOWORD(pcds->dwData) == WM_SETTEXT) // Only message we know about
{
st.flags = ST_CHECKPROTECTION;
st.codepage = 1200;
msg = EM_SETTEXTEX;
wparam = (WPARAM) &st;
lparam = (LPARAM) pcds->lpData;
goto serv;
}
else
lres = ::DefWindowProc(hwnd, msg, wparam, lparam);
break;
case WM_GETTEXTLENGTH:
#ifndef NOANSIWINDOWS
GETTEXTLENGTHEX gtl;
if (W32->OnWin9x() || phost->_fANSIwindow)
W32->AnsiFilter( msg, wparam, lparam, (void *) &gtl );
#endif
goto serv;
case WM_CHAR:
if(GetKeyboardFlags() & ALTNUMPAD) // Handle Alt+0ddd in CTxtEdit
goto serv; // so that other hosts also work
#ifndef NOANSIWINDOWS
else if (W32->OnWin9x() || phost->_fANSIwindow)
{
CW32System::WM_CHAR_INFO wmci;
wmci._fAccumulate = phost->_fAccumulateDBC != 0;
W32->AnsiFilter( msg, wparam, lparam, (void *) &wmci,
((CTxtEdit *)phost->_pserv)->Get10Mode() );
if (wmci._fLeadByte)
{
phost->_fAccumulateDBC = TRUE;
phost->_chLeadByte = wparam << 8;
goto Exit; // Wait for trail byte
}
else if (wmci._fTrailByte)
{
wparam = phost->_chLeadByte | wparam;
phost->_fAccumulateDBC = FALSE;
phost->_chLeadByte = 0;
msg = WM_IME_CHAR;
goto serv;
}
else if (wmci._fIMEChar)
{
msg = WM_IME_CHAR;
goto serv;
}
}
#endif
lres = phost->OnChar((WORD) wparam, (DWORD) lparam);
if(lres) // Didn't process code:
goto serv; // give it to text services
break;
case WM_ENABLE:
if(!wparam ^ phost->_fDisabled)
{
// Stated of window changed so invalidate it so it will
// get redrawn.
phost->TxInvalidateRect(NULL, TRUE);
phost->SetScrollBarsForWmEnable(wparam);
}
phost->_fDisabled = !wparam; // Set disabled flag
lres = 0; // Return value for message
// Fall thru to WM_SYSCOLORCHANGE?
case WM_SYSCOLORCHANGE:
phost->OnSysColorChange();
goto serv; // Notify text services that
// system colors have changed
case WM_GETDLGCODE:
lres = phost->OnGetDlgCode(wparam, lparam);
break;
case EM_GETOPTIONS:
lres = phost->OnGetOptions();
break;
case EM_GETPASSWORDCHAR:
lres = phost->_chPassword;
break;
case EM_GETRECT:
phost->OnGetRect((LPRECT)lparam);
break;
case EM_HIDESELECTION:
if(lparam)
{
DWORD dwPropertyBits = 0;
phost->_dwStyle |= ES_NOHIDESEL;
if(wparam)
{
phost->_dwStyle &= ~ES_NOHIDESEL;
dwPropertyBits = TXTBIT_HIDESELECTION;
}
// Notify text services of change in status.
phost->_pserv->OnTxPropertyBitsChange(TXTBIT_HIDESELECTION,
dwPropertyBits);
}
goto serv;
case EM_SETBKGNDCOLOR:
lres = (LRESULT) phost->_crBackground;
phost->_fNotSysBkgnd = !wparam;
phost->_crBackground = (COLORREF) lparam;
if(wparam)
phost->_crBackground = GetSysColor(COLOR_WINDOW);
if(lres != (LRESULT) phost->_crBackground)
{
// Notify text services that color has changed
LRESULT lres1 = 0;
phost->_pserv->TxSendMessage(WM_SYSCOLORCHANGE, 0, 0, &lres1);
phost->TxInvalidateRect(NULL, TRUE);
}
break;
case WM_STYLECHANGING:
// Just pass this one to the default window proc
lres = ::DefWindowProc(hwnd, msg, wparam, lparam);
break;
case WM_STYLECHANGED:
//
// For now, we only interested in GWL_EXSTYLE Transparent mode changed.
// This is to fix Bug 753 since Window95 is not passing us
// the WS_EX_TRANSPARENT.
//
lres = 1;
if(GWL_EXSTYLE == wparam)
{
LPSTYLESTRUCT lpss = (LPSTYLESTRUCT) lparam;
if(phost->IsTransparentMode() != (BOOL)(lpss->styleNew & WS_EX_TRANSPARENT))
{
phost->_dwExStyle = lpss->styleNew;
((CTxtEdit *)phost->_pserv)->OnTxBackStyleChange(TRUE);
// Return 0 to indicate we have handled this message
lres = 0;
}
}
break;
case EM_SHOWSCROLLBAR:
{
Assert(wparam == SB_VERT || wparam == SB_HORZ);
DWORD dwBit = wparam == SB_VERT ? WS_VSCROLL : WS_HSCROLL;
phost->_dwStyle |= dwBit;
if(!lparam)
phost->_dwStyle &= ~dwBit;
phost->TxShowScrollBar((int) wparam, lparam);
if (lparam)
phost->TxSetScrollRange((int) wparam, 0, 0, TRUE);
}
break;
case EM_SETOPTIONS:
phost->OnSetOptions((WORD) wparam, (DWORD) lparam);
lres = (phost->_dwStyle & ECO_STYLES);
if(phost->_fEnableAutoWordSel)
lres |= ECO_AUTOWORDSELECTION;
break;
case EM_SETPASSWORDCHAR:
if(phost->_chPassword != (TCHAR)wparam)
{
phost->_chPassword = (TCHAR)wparam;
phost->_pserv->OnTxPropertyBitsChange(TXTBIT_USEPASSWORD,
phost->_chPassword ? TXTBIT_USEPASSWORD : 0);
}
break;
case EM_SETREADONLY:
phost->OnSetReadOnly(BOOL(wparam));
lres = 1;
break;
case EM_SETRECTNP:
case EM_SETRECT:
phost->OnSetRect((LPRECT)lparam, wparam == 1, msg == EM_SETRECT);
break;
case WM_SIZE:
phost->_pserv->TxSendMessage(msg, wparam, lparam, &lres);
lres = phost->OnSize(hwnd, wparam, (int)LOWORD(lparam), (int)HIWORD(lparam));
break;
case WM_WINDOWPOSCHANGING:
lres = ::DefWindowProc(hwnd, msg, wparam, lparam);
// richedit 1.0 didn't cause InvalidateRect which OnSunkenWindowPosChanging will do
if(phost->TxGetEffects() == TXTEFFECT_SUNKEN && !((CTxtEdit *)phost->_pserv)->Get10Mode())
phost->OnSunkenWindowPosChanging(hwnd, (WINDOWPOS *) lparam);
break;
case WM_SETCURSOR:
// Only set cursor when over us rather than a child; this
// helps prevent us from fighting it out with an inplace child
if((HWND)wparam == hwnd)
{
if(!(lres = ::DefWindowProc(hwnd, msg, wparam, lparam)))
{
POINT pt;
GetCursorPos(&pt);
::ScreenToClient(hwnd, &pt);
phost->_pserv->OnTxSetCursor(
DVASPECT_CONTENT,
-1,
NULL,
NULL,
NULL,
NULL,
NULL, // Client rect - no redraw
pt.x,
pt.y);
lres = TRUE;
}
}
break;
case WM_SHOWWINDOW:
hr = phost->OnTxVisibleChange((BOOL)wparam);
break;
case WM_NCPAINT:
lres = ::DefWindowProc(hwnd, msg, wparam, lparam);
break;
case WM_PRINTCLIENT:
case WM_PAINT:
{
PAINTSTRUCT ps;
HPALETTE hpalOld = NULL;
HDC hdc;
RECT rcClient;
//RAID 6964: WM_PRINTCLIENT should not call BeginPaint. If a HDC is passed
//down in the wparam, use it instead of calling BeginPaint.
if (!wparam || ((CTxtEdit *)phost->_pserv)->Get10Mode())
hdc = BeginPaint(hwnd, &ps);
else
hdc = (HDC) wparam;
// Set up the palette for drawing our data
if(phost->_hpal)
{
hpalOld = SelectPalette(hdc, phost->_hpal, TRUE);
RealizePalette(hdc);
}
// Since we are using the CS_PARENTDC style, make sure
// the clip region is limited to our client window.
GetClientRect(hwnd, &rcClient);
SaveDC(hdc);
IntersectClipRect(hdc, rcClient.left, rcClient.top, rcClient.right, rcClient.bottom);
phost->_pserv->TxDraw(
DVASPECT_CONTENT, // Draw Aspect
-1, // Lindex
NULL, // Info for drawing optimazation
NULL, // target device information
hdc, // Draw device HDC
NULL, // Target device HDC
(const RECTL *) &rcClient,// Bounding client rectangle
NULL, // Clipping rectangle for metafiles
&ps.rcPaint, // Update rectangle
NULL, // Call back function
NULL, // Call back parameter
TXTVIEW_ACTIVE); // What view - the active one!
// Restore palette if there is one
#ifndef NOPALETTE
if(hpalOld)
SelectPalette(hdc, hpalOld, TRUE);
#endif
RestoreDC(hdc, -1);
if (!wparam || ((CTxtEdit *)phost->_pserv)->Get10Mode())
EndPaint(hwnd, &ps);
}
break;
case EM_SETMARGINS:
phost->OnSetMargins(wparam, LOWORD(lparam), HIWORD(lparam));
break;
case EM_SETPALETTE:
// Application is setting a palette for us to use.
phost->_hpal = (HPALETTE) wparam;
// Invalidate the window & repaint to reflect the new palette.
InvalidateRect(hwnd, NULL, TRUE);
break;
default:
serv:
hr = phost->_pserv->TxSendMessage(msg, wparam, lparam, &lres);
if(hr == S_FALSE)
{
// Message was not processed by text services so send it
// to the default window proc.
lres = ::DefWindowProc(hwnd, msg, wparam, lparam);
}
}
Exit:
phost->Release();
return lres;
}
static BOOL GetIconic(
HWND hwnd)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "GetIconic");
while(hwnd)
{
if(IsIconic(hwnd))
return TRUE;
hwnd = GetParent(hwnd);
}
return FALSE;
}
//////////////// CTxtWinHost Creation/Initialization/Destruction ///////////////////////
/*
* CTxtWinHost::OnNCCreate (hwnd, pcs)
*
* @mfunc
* Static global method to handle WM_NCCREATE message (see remain.c)
*/
CTxtWinHost *CTxtWinHost::OnNCCreate(
HWND hwnd,
const CREATESTRUCT *pcs,
BOOL fIsAnsi,
BOOL fIs10Mode)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnNCCreate");
#if defined DEBUG && !defined(NOFULLDEBUG)
GdiSetBatchLimit(1);
#endif
CTxtWinHost *phost = new CTxtWinHost();
if(!phost)
return 0;
CREATESTRUCT cs = *pcs; // prefer C++ compiler not to modify constant
#ifndef NOCOMPLEXSCRIPTS
BOOL fMirrorWnd = !!(cs.dwExStyle & WS_EX_LAYOUTRTL); // Inherit parent window's mirroring
if (fMirrorWnd)
{
// Force RTL reading
cs.style |= ES_RIGHT;
cs.dwExStyle |= WS_EX_RTLREADING;
}
#endif
#ifndef NOANSIWINDOWS
//bug fix #5386
// Window wasn't created with the Richedit20A window class
// and we are under Win9x, need to convert string to UNICODE
CStrInW strinwName(((LPSTR)pcs->lpszName), GetKeyboardCodePage());
CStrInW strinwClass(((LPSTR)pcs->lpszClass), CP_ACP);
if (!fIsAnsi && W32->OnWin9x())
{
cs.lpszName = (WCHAR *)strinwName;
cs.lpszClass = (WCHAR *)strinwClass;
}
#endif
// Stores phost in associated window data
if(!phost->Init(hwnd, (const CREATESTRUCT*)&cs, fIsAnsi, fIs10Mode))
{
phost->Shutdown();
delete phost;
phost = NULL;
}
#ifndef NOCOMPLEXSCRIPTS
if (phost && fMirrorWnd)
{
// Disable mirroring layout to avoid mirrored mapping mode
SetWindowLong(hwnd, GWL_STYLE, cs.style | ES_RIGHT);
SetWindowLong(hwnd, GWL_EXSTYLE, (cs.dwExStyle & ~WS_EX_LAYOUTRTL) | WS_EX_LEFTSCROLLBAR);
}
#endif
return phost;
}
/*
* CTxtWinHost::OnNCDestroy (phost)
*
* @mfunc
* Static global method to handle WM_CREATE message
*
* @devnote
* phost ptr is stored in window data (GetWindowLong())
*/
void CTxtWinHost::OnNCDestroy(
CTxtWinHost *phost)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnNCDestroy");
phost->Shutdown();
phost->Release();
}
/*
* CTxtWinHost::CTxtWinHost()
*
* @mfunc
* constructor
*/
CTxtWinHost::CTxtWinHost()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::CTxtWinHost");
#ifndef NOACCESSIBILITY
_pTypeInfo = NULL;
#endif
_fRegisteredForDrop = FALSE;
_crefs = 1;
if(!_fNotSysBkgnd)
_crBackground = GetSysColor(COLOR_WINDOW);
}
/*
* CTxtWinHost::~CTxtWinHost()
*
* @mfunc
* destructor
*/
CTxtWinHost::~CTxtWinHost()
{
AssertSz(_pserv == NULL,
"CTxtWinHost::~CTxtWinHost - shutdown not called till destructor");
if(_pserv)
Shutdown();
}
/*
* CTxtWinHost::Shutdown()
*
* @mfunc Shut down this object, but doesn't delete memory
*/
void CTxtWinHost::Shutdown()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::Shutdown");
ITextServices *pserv;
HostRevokeDragDrop(); // Revoke our drop target
if(_pserv)
{
// Guarantee that no recursive callbacks can happen during shutdown.
pserv = _pserv;
_pserv = NULL;
pserv->OnTxInPlaceDeactivate();
pserv->Release();
// Host release was not the final release so notify
// text services that they need to keep their reference
// to the host valid.
if (!_fTextServiceFree)
{
((CTxtEdit *)pserv)->SetReleaseHost();
}
}
#if 0
ImmTerminate(); // Terminate only useful on Mac.
#endif
if(_hwnd)
SetWindowLongPtr(_hwnd, ibPed, 0);
}
/*
* CTxtWinHost::Init (hwnd, pcs)
*
* @mfunc
* Initialize this CTxtWinHost
*/
BOOL CTxtWinHost::Init(
HWND hwnd, //@parm Window handle for this control
const CREATESTRUCT *pcs, //@parm Corresponding CREATESTRUCT
BOOL fIsAnsi, //@parm is ansi window
BOOL fIs10Mode) //@parm is 1.0 mode window
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::Init");
AssertSz(!fIs10Mode || (fIsAnsi && fIs10Mode),
"CTxtWinHost::Init input flags are out of sync!");
if(!pcs->lpszClass)
return FALSE;
// Set pointer back to CTxtWinHost from the window
if(hwnd)
SetWindowLongPtr(hwnd, ibPed, (INT_PTR)this);
_hwnd = hwnd;
// Here we want to keep track of the "RichEdit20A"window class
// The RICHEDIT window class is handled by a wrapper dll.
// If the class name is "RICHEDIT", then we need to turn on the
// RichEdit 1.0 compatibility bit. IsAnsiWindowClass tests that class as well.
_fANSIwindow = fIsAnsi;
// Edit controls created without a window are multiline by default
// so that paragraph formats can be
_dwStyle = ES_MULTILINE;
_fHidden = TRUE;
if(pcs)
{
_hwndParent = pcs->hwndParent;
_dwExStyle = pcs->dwExStyle;
_dwStyle = pcs->style;
if (!fIs10Mode)
{
// Only set this for 2.0 windows
// According to the edit control documentation WS_HSCROLL implies that
// ES_AUTOSCROLL is set and WS_VSCROLL implies that ES_AUTOVSCROLL is
// set. Here, we make this so.
if(_dwStyle & WS_HSCROLL)
_dwStyle |= ES_AUTOHSCROLL;
// handle default disabled
if(_dwStyle & WS_DISABLED)
_fDisabled = TRUE;
}
else
{
if (GetBkMode(GetDC(hwnd)) == TRANSPARENT)
_dwExStyle |= WS_EX_TRANSPARENT;
else
_dwExStyle &= ~WS_EX_TRANSPARENT;
}
if(_dwStyle & WS_VSCROLL)
_dwStyle |= ES_AUTOVSCROLL;
_fBorder = !!(_dwStyle & WS_BORDER);
if((_dwStyle & ES_SUNKEN) || (_dwExStyle & WS_EX_CLIENTEDGE))
_fBorder = TRUE;
// handle default passwords
if(_dwStyle & ES_PASSWORD)
_chPassword = TEXT('*');
// On Win95 ES_SUNKEN and WS_BORDER get mapped to WS_EX_CLIENTEDGE
if(_fBorder && W32->_dwMajorVersion >= VERS4)
{
_dwExStyle |= WS_EX_CLIENTEDGE;
SetWindowLong(_hwnd, GWL_EXSTYLE, _dwExStyle);
}
#ifndef NORIGHTTOLEFT
// Process some flags for mirrored control
if (_dwExStyle & WS_EX_LAYOUTRTL)
{
// Swap whatever RTL params we have
_dwStyle = (_dwStyle & ~ES_RIGHT) | (_dwStyle & ES_RIGHT ^ ES_RIGHT);
_dwExStyle = (_dwExStyle & ~WS_EX_RTLREADING) | (_dwExStyle & WS_EX_RTLREADING ^ WS_EX_RTLREADING);
_dwExStyle = (_dwExStyle & ~WS_EX_LEFTSCROLLBAR) |
(_dwStyle & ES_RIGHT ? WS_EX_LEFTSCROLLBAR : 0);
// Disable mirroring layout to avoid GDI mirroring mapping mode
_dwExStyle &= ~WS_EX_LAYOUTRTL;
SetWindowLong(_hwnd, GWL_STYLE, _dwStyle);
SetWindowLong(_hwnd, GWL_EXSTYLE, _dwExStyle);
}
#endif
}
// Create Text Services component
// Watch out for sys param and sys font initialization!! see below.
if(FAILED(CreateTextServices()))
return FALSE;
_xInset = (char)W32->GetCxBorder();
_yInset = (char)W32->GetCyBorder();
if (!_fBorder)
{
_xInset += _xInset;
_yInset += _yInset;
}
// At this point the border flag is set and so is the pixels per inch
// so we can initalize the inset.
// This must be done after CreatingTextServices so sys params are valid
SetDefaultInset();
// Set alignment and paragraph direction
PARAFORMAT PF2;
PF2.dwMask = 0;
#ifndef NOCOMPLEXSCRIPTS
BOOL fRCAlign = _dwStyle & (ES_RIGHT | ES_CENTER) || _dwExStyle & WS_EX_RIGHT;
if(fRCAlign)
{
PF2.dwMask |= PFM_ALIGNMENT;
PF2.wAlignment = (WORD)(_dwStyle & ES_CENTER ? PFA_CENTER : PFA_RIGHT); // right or center-aligned
}
if(_dwExStyle & WS_EX_RTLREADING)
{
PF2.dwMask |= PFM_RTLPARA;
PF2.wEffects = PFE_RTLPARA; // RTL reading order
}
#endif
if (PF2.dwMask)
{
PF2.cbSize = sizeof(PARAFORMAT2);
// tell text services
_pserv->TxSendMessage(EM_SETPARAFORMAT, SPF_SETDEFAULT, (LPARAM)&PF2, NULL);
}
if (fIs10Mode)
{
((CTxtEdit *)_pserv)->Set10Mode();
// Remove the WS_VSCROLL and WS_HSCROLL initially
if (_hwnd && !(_dwStyle & ES_DISABLENOSCROLL))
{
SetScrollRange(_hwnd, SB_VERT, 0, 0, TRUE);
SetScrollRange(_hwnd, SB_HORZ, 0, 0, TRUE);
DWORD dwStyle = _dwStyle & ~(WS_VSCROLL | WS_HSCROLL);
SetWindowLong(_hwnd, GWL_STYLE, dwStyle);
// bug fix:
// On some systems, ie Digital PII-266, we don't get a WM_PAINT message
// when we change the window style. So force a WM_PAINT into the message queue
TxInvalidateRect(NULL, TRUE);
}
}
// Set window text
if(pcs && pcs->lpszName)
{
if(FAILED(_pserv->TxSetText((TCHAR *)pcs->lpszName)))
{
SafeReleaseAndNULL((IUnknown **)&_pserv);
return FALSE;
}
}
if(_dwStyle & ES_LOWERCASE)
_pserv->TxSendMessage(EM_SETEDITSTYLE, SES_LOWERCASE,
SES_LOWERCASE | SES_UPPERCASE, NULL);
#if 0
if(!ImmInitialize()) // Mac Only
{
#if defined(DEBUG)
OutputDebugString(TEXT("Could not register Imm ImmInitializeForMac.\r\n"));
#endif // DEBUG
}
#endif
return TRUE;
}
HRESULT CTxtWinHost::CreateTextServices()
{
IUnknown *pUnk;
HRESULT hr = ::CreateTextServices(NULL, this, &pUnk);
if(hr != NOERROR)
return hr;
// Get text services interface
hr = pUnk->QueryInterface(IID_ITextServices, (void **)&_pserv);
// Regardless of whether the previous call succeeded or failed, we are
// done with the private interface.
pUnk->Release();
#ifndef NOCOMPLEXSCRIPTS
if(hr == NOERROR)
{
((CTxtEdit *)_pserv)->_fInOurHost = TRUE;
// FE extended styles might set the fFE bit
if(_dwExStyle & (WS_EX_RIGHT | WS_EX_RTLREADING | WS_EX_LEFTSCROLLBAR))
_pserv->TxSendMessage(EM_SETEDITSTYLE, SES_BIDI, SES_BIDI, NULL);
}
#endif
return hr;
}
/*
* CTxtWinHost::OnCreate (pcs)
*
* @mfunc
* Handle WM_CREATE message
*
* @rdesc
* LRESULT = -1 if failed to in-place activate; else 0
*/
LRESULT CTxtWinHost::OnCreate(
const CREATESTRUCT *pcs)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnCreate");
RECT rcClient;
// sometimes, these values are -1 (from windows itself); just treat them
// as zero in that case
LONG cy = (pcs->cy < 0) ? 0 : pcs->cy;
LONG cx = (pcs->cx < 0) ? 0 : pcs->cx;
rcClient.top = pcs->y;
rcClient.bottom = rcClient.top + cy;
rcClient.left = pcs->x;
rcClient.right = rcClient.left + cx;
// Notify Text Services that we are in place active
if(FAILED(_pserv->OnTxInPlaceActivate(&rcClient)))
return -1;
DWORD dwStyle = GetWindowLong(_hwnd, GWL_STYLE);
// Hide all scrollbars to start
if(_hwnd && !(dwStyle & ES_DISABLENOSCROLL) && !((CTxtEdit *)_pserv)->Get10Mode())
{
SetScrollRange(_hwnd, SB_VERT, 0, 0, TRUE);
SetScrollRange(_hwnd, SB_HORZ, 0, 0, TRUE);
dwStyle &= ~(WS_VSCROLL | WS_HSCROLL);
SetWindowLong(_hwnd, GWL_STYLE, dwStyle);
}
if(!(dwStyle & (ES_READONLY | ES_NOOLEDRAGDROP)))
{
// This isn't a read only window or a no drop window,
// so we need a drop target.
HostRegisterDragDrop();
}
_usIMEMode = 0;
if(dwStyle & ES_NOIME)
{
_usIMEMode = ES_NOIME;
// Tell textservices to turnoff ime
_pserv->TxSendMessage(EM_SETEDITSTYLE, SES_NOIME, SES_NOIME, NULL);
}
else if(dwStyle & ES_SELFIME)
_usIMEMode = ES_SELFIME;
return 0;
}
///////////////////////////////// IUnknown ////////////////////////////////
HRESULT CTxtWinHost::QueryInterface(REFIID riid, void **ppv)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::QueryInterface");
if(IsEqualIID(riid, IID_IUnknown))
*ppv = (IUnknown *)(ITextHost2*)this;
else if(IsEqualIID(riid, IID_ITextHost) )
*ppv = (ITextHost *)(CTxtWinHost*)this;
else if(IsEqualIID(riid, IID_ITextHost2) )
*ppv = (ITextHost2 *)(CTxtWinHost*)this;
else
*ppv = NULL;
if(*ppv)
{
AddRef();
return NOERROR;
}
return E_NOINTERFACE;
}
ULONG CTxtWinHost::AddRef(void)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::AddRef");
return ++_crefs;
}
ULONG CTxtWinHost::Release(void)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::Release");
--_crefs;
if(!_crefs)
{
#ifndef NOACCESSIBILITY
if(_pTypeInfo)
{
_pTypeInfo->Release();
_pTypeInfo = NULL;
}
#endif
delete this;
return 0;
}
return _crefs;
}
//////////////////////////////// Activation ////////////////////////////////
//////////////////////////////// Properties ////////////////////////////////
TXTEFFECT CTxtWinHost::TxGetEffects() const
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::TxGetEffects");
if((_dwStyle & ES_SUNKEN) || (_dwExStyle & WS_EX_CLIENTEDGE))
return TXTEFFECT_SUNKEN;
return TXTEFFECT_NONE;
}
/////////////////////////////// Keyboard Messages //////////////////////////////////
/*
* CTxtWinHost::OnKeyDown (vkey, dwFlags)
*
* @mfunc
* Handle WM_KEYDOWN messages that need to send a message to the parent
* window (may happen when control is in a dialog box)
*
* #rdesc
* LRESULT = (code processed) ? 0 : 1
*/
LRESULT CTxtWinHost::OnKeyDown(
WORD vkey, //@parm WM_KEYDOWN wparam (virtual key code)
DWORD dwFlags) //@parm WM_KEYDOWN flags
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnKeyDown");
if(!_fInDialogBox) // Not in a dialog box
return 1; // Signal key-down msg not processed
DWORD dwKeyFlags = GetKeyboardFlags();
switch(vkey)
{
case VK_ESCAPE:
PostMessage(_hwndParent, WM_CLOSE, 0, 0);
return 0;
case VK_RETURN:
if(!(dwKeyFlags & CTRL) && !(_dwStyle & ES_WANTRETURN))
{
// Send to default button
HWND hwndT;
LRESULT id = SendMessage(_hwndParent, DM_GETDEFID, 0, 0);
if(LOWORD(id) && (hwndT = GetDlgItem(_hwndParent, LOWORD(id))))
{
SendMessage(_hwndParent, WM_NEXTDLGCTL, (WPARAM) hwndT, (LPARAM) 1);
if(GetFocus() != _hwnd)
PostMessage(hwndT, WM_KEYDOWN, (WPARAM) VK_RETURN, 0);
}
return 0;
}
break;
case VK_TAB:
if(!(dwKeyFlags & CTRL))
{
SendMessage(_hwndParent, WM_NEXTDLGCTL,
!!(dwKeyFlags & SHIFT), 0);
return 0;
}
break;
}
return 1;
}
/*
* CTxtWinHost::OnChar (vkey, dwFlags)
*
* @mfunc
* Eat some WM_CHAR messages for a control in a dialog box
*
* #rdesc
* LRESULT = (code processed) ? 0 : 1
*/
LRESULT CTxtWinHost::OnChar(
WORD vkey, //@parm WM_CHAR wparam (translated key code)
DWORD dwFlags) //@parm WM_CHAR flags
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnChar");
if(!_fInDialogBox || (GetKeyboardFlags() & CTRL))
return 1;
switch(vkey)
{
case 'J' - 0x40: // Ctrl-Return generates Ctrl-J (LF):
case VK_RETURN: // treat it as an ordinary return
// We need to filter-out cases where we don't want to insert <cr> in
// 1.0 mode here since the info isn't available within the ped
if (((CTxtEdit*)_pserv)->Get10Mode())
{
if (_fInDialogBox && dwFlags != MK_CONTROL && !(_dwStyle & ES_WANTRETURN))
return 0;
if (!(_dwStyle & ES_MULTILINE))
{
//richedit beeps in this case
((CTxtEdit*)_pserv)->Beep();
return 0;
}
}
else if (!(_dwStyle & ES_WANTRETURN))
return 0; // Signal char processed (eaten)
break;
case VK_TAB:
return 0;
}
return 1; // Signal char not processed
}
///////////////////////////////// View rectangle //////////////////////////////////////
void CTxtWinHost::OnGetRect(
LPRECT prc)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnGetRect");
RECT rcInset;
LONG lSelBarWidth = 0;
if(_fEmSetRectCalled)
{
// Get the selection bar width and add it back to the view inset so
// we return the rectangle that the application set.
TxGetSelectionBarWidth(&lSelBarWidth);
}
// Get view inset (in HIMETRIC)
TxGetViewInset(&rcInset);
// Get client rect in pixels
TxGetClientRect(prc);
// Modify the client rect by the inset converted to pixels
prc->left += W32->HimetricToDevice(rcInset.left + lSelBarWidth, W32->GetXPerInchScreenDC());
prc->top += W32->HimetricToDevice(rcInset.top, W32->GetYPerInchScreenDC());
prc->right -= W32->HimetricToDevice(rcInset.right, W32->GetXPerInchScreenDC());
prc->bottom -= W32->HimetricToDevice(rcInset.bottom, W32->GetYPerInchScreenDC());
}
void CTxtWinHost::OnSetRect(
LPRECT prc, //@parm Desired formatting RECT
BOOL fNewBehavior, //@parm If TRUE, prc is inset RECT directly
BOOL fRedraw) //@parm If TRUE, redraw after setting RECT
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnSetRect");
RECT rcClient;
LONG lSelBarWidth;
// Assuming this is not set to the default, turn on special EM_SETRECT
// processing. The important part of this is that we subtract the selection
// bar from the view inset because the EM_SETRECT rectangle does not
// include the selection bar.
_fEmSetRectCalled = TRUE;
if(!prc)
{
// We are back to the default so turn off special EM_SETRECT procesing.
_fEmSetRectCalled = FALSE;
SetDefaultInset();
}
else
{
// For screen display, the following intersects new view RECT
// with adjusted client area RECT
TxGetClientRect(&rcClient);
// Adjust client rect. Factors in space for borders
if(_fBorder)
{
rcClient.top += _yInset;
rcClient.bottom -= _yInset - 1;
rcClient.left += _xInset;
rcClient.right -= _xInset;
}
if(!fNewBehavior)
{
// Intersect new view rectangle with adjusted client area rectangle
if(!IntersectRect(&_rcViewInset, &rcClient, prc))
_rcViewInset = rcClient;
}
else
_rcViewInset = *prc;
// Get selection bar width
TxGetSelectionBarWidth(&lSelBarWidth);
// Compute inset in pixels and convert to HIMETRIC.
_rcViewInset.left = W32->DeviceToHimetric(_rcViewInset.left - rcClient.left, W32->GetXPerInchScreenDC()) - lSelBarWidth;
_rcViewInset.top = W32->DeviceToHimetric(_rcViewInset.top - rcClient.top, W32->GetYPerInchScreenDC());
_rcViewInset.right = W32->DeviceToHimetric(rcClient.right - _rcViewInset.right, W32->GetXPerInchScreenDC());
_rcViewInset.bottom = W32->DeviceToHimetric(rcClient.bottom - _rcViewInset.bottom, W32->GetYPerInchScreenDC());
}
if(fRedraw)
{
_pserv->OnTxPropertyBitsChange(TXTBIT_VIEWINSETCHANGE,
TXTBIT_VIEWINSETCHANGE);
}
}
/////////////////////////////// System notifications //////////////////////////////////
void CTxtWinHost::OnSysColorChange()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnSysColorChange");
if(!_fNotSysBkgnd)
_crBackground = GetSysColor(COLOR_WINDOW);
TxInvalidateRect(NULL, TRUE);
}
/*
* CTxtWinHost::OnGetDlgCode (wparam, lparam)
*
* @mfunc
* Handle some WM_GETDLGCODE messages
*
* #rdesc
* LRESULT = dialog code
*/
LRESULT CTxtWinHost::OnGetDlgCode(
WPARAM wparam,
LPARAM lparam)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnGetDlgCode");
LRESULT lres = DLGC_WANTCHARS | DLGC_WANTARROWS | DLGC_WANTTAB;
if(_dwStyle & ES_MULTILINE)
lres |= DLGC_WANTALLKEYS;
if(!(_dwStyle & ES_SAVESEL))
lres |= DLGC_HASSETSEL;
// HACK: If we get one of these messages then we turn on the special
// EM_SETSEL behavior. The problem is that _fInDialogBox gets turned
// on after the EM_SETSEL has occurred.
_fUseSpecialSetSel = TRUE;
/*
** -------------------------------------------- JEFFBOG HACK ----
** Only set Dialog Box Flag if GETDLGCODE message is generated by
** IsDialogMessage -- if so, the lParam will be a pointer to the
** message structure passed to IsDialogMessage; otherwise, lParam
** will be NULL. Reason for the HACK alert: the wParam & lParam
** for GETDLGCODE is still not clearly defined and may end up
** changing in a way that would throw this off
** -------------------------------------------- JEFFBOG HACK ----
*/
if(lparam)
_fInDialogBox = TRUE;
/*
** If this is a WM_SYSCHAR message generated by the UNDO keystroke
** we want this message so we can EAT IT in remain.c, case WM_SYSCHAR:
*/
if (lparam &&
(((LPMSG)lparam)->message == WM_SYSCHAR) &&
(((LPMSG)lparam)->lParam & SYS_ALTERNATE) &&
wparam == VK_BACK)
{
lres |= DLGC_WANTMESSAGE;
}
return lres;
}
///////////////////////////////// Other messages //////////////////////////////////////
LRESULT CTxtWinHost::OnGetOptions() const
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnGetOptions");
LRESULT lres = (_dwStyle & ECO_STYLES);
if(_fEnableAutoWordSel)
lres |= ECO_AUTOWORDSELECTION;
return lres;
}
void CTxtWinHost::OnSetOptions(
WORD wOp,
DWORD eco)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnSetOptions");
DWORD dwChangeMask = 0;
DWORD dwProp = 0;
DWORD dwStyle;
DWORD dwStyleNew = _dwStyle;
const BOOL fAutoWordSel = !!(eco & ECO_AUTOWORDSELECTION);
BOOL bNeedToTurnOffIME = FALSE;
// We keep track of the bits changed and then if any have changed we
// query for all of our property bits and then send them. This simplifies
// the code because we don't have to set all the bits specially. If the
// code is changed to make the properties more in line with the new
// model, we want to look at this code again.
// Single line controls can't have a selection bar or do vertical writing
if(!(_dwStyle & ES_MULTILINE))
eco &= ~ECO_SELECTIONBAR;
Assert((DWORD)fAutoWordSel <= 1); // Make sure that BOOL is 1/0
dwStyle = (eco & ECO_STYLES);
switch(wOp)
{
case ECOOP_SET:
dwStyleNew = (dwStyleNew & ~ECO_STYLES) | dwStyle;
_fEnableAutoWordSel = fAutoWordSel;
break;
case ECOOP_OR:
dwStyleNew |= dwStyle; // Setting a :1 flag = TRUE
if(fAutoWordSel) // or FALSE is 1 instruction
_fEnableAutoWordSel = TRUE; // Setting it to a BOOL
break; // averages 9 instructions!
case ECOOP_AND:
dwStyleNew &= (dwStyle | ~ECO_STYLES);
if(!fAutoWordSel)
_fEnableAutoWordSel = FALSE;
break;
case ECOOP_XOR:
dwStyleNew ^= dwStyle;
if(fAutoWordSel)
_fEnableAutoWordSel ^= 1;
break;
}
if(_fEnableAutoWordSel != (unsigned)fAutoWordSel)
dwChangeMask |= TXTBIT_AUTOWORDSEL;
if(dwStyleNew != _dwStyle)
{
DWORD dwChange = dwStyleNew ^ _dwStyle;
AssertSz(!(dwChange & ~ECO_STYLES), "non-eco style changed");
if(!(dwStyleNew & ES_MULTILINE))
dwStyleNew &= ~ES_VERTICAL;
_dwStyle = dwStyleNew;
SetWindowLong(_hwnd, GWL_STYLE, dwStyleNew & ~ES_VERTICAL);
if(dwChange & ES_NOHIDESEL)
dwChangeMask |= TXTBIT_HIDESELECTION;
// These two local variables to use to keep track of
// previous setting of ES_READONLY
BOOL bReadOnly = (_dwStyle & ES_READONLY);
if(dwChange & ES_READONLY)
{
dwChangeMask |= TXTBIT_READONLY;
// Change drop target state as appropriate.
if(dwStyleNew & ES_READONLY)
HostRevokeDragDrop();
else
HostRegisterDragDrop();
bReadOnly = (dwStyleNew & ES_READONLY);
}
if(dwChange & ES_VERTICAL)
dwChangeMask |= TXTBIT_VERTICAL;
if(dwChange & ES_NOIME)
{
_usIMEMode = (dwStyleNew & ES_NOIME) ? ES_NOIME : 0;
bNeedToTurnOffIME = (_usIMEMode ==ES_NOIME);
}
else if(dwChange & ES_SELFIME)
_usIMEMode = (dwStyleNew & ES_SELFIME) ? ES_SELFIME : 0;
// No action required for ES_WANTRETURN nor for ES_SAVESEL
// Do this last
if(dwChange & ES_SELECTIONBAR)
dwChangeMask |= TXTBIT_SELBARCHANGE;
}
if (dwChangeMask)
{
TxGetPropertyBits(dwChangeMask, &dwProp);
_pserv->OnTxPropertyBitsChange(dwChangeMask, dwProp);
}
if (bNeedToTurnOffIME)
// Tell textservices to turnoff ime
_pserv->TxSendMessage(EM_SETEDITSTYLE, SES_NOIME, SES_NOIME, NULL);
}
void CTxtWinHost::OnSetReadOnly(
BOOL fReadOnly)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnSetReadOnly");
DWORD dwT = GetWindowLong(_hwnd, GWL_STYLE);
DWORD dwUpdatedBits = 0;
if(fReadOnly)
{
dwT |= ES_READONLY;
_dwStyle |= ES_READONLY;
// Turn off Drag Drop
HostRevokeDragDrop();
dwUpdatedBits |= TXTBIT_READONLY;
}
else
{
dwT &= ~ES_READONLY;
_dwStyle &= ~ES_READONLY;
// Turn drag drop back on
HostRegisterDragDrop();
}
_pserv->OnTxPropertyBitsChange(TXTBIT_READONLY, dwUpdatedBits);
SetWindowLong(_hwnd, GWL_STYLE, dwT);
}
//////////////////////////////////// Helpers /////////////////////////////////////////
void CTxtWinHost::SetDefaultInset()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::SetDefaultInset");
// Generate default view rect from client rect
if(_fBorder)
{
// Factors in space for borders
_rcViewInset.top = W32->DeviceToHimetric(_yInset, W32->GetYPerInchScreenDC());
_rcViewInset.bottom = W32->DeviceToHimetric(_yInset - 1, W32->GetYPerInchScreenDC());
_rcViewInset.left = W32->DeviceToHimetric(_xInset, W32->GetXPerInchScreenDC());
_rcViewInset.right = W32->DeviceToHimetric(_xInset, W32->GetXPerInchScreenDC());
}
else
{
// Default the top and bottom inset to 0 and the left and right
// to the size of the border.
_rcViewInset.top = 0;
_rcViewInset.bottom = 0;
_rcViewInset.left = W32->DeviceToHimetric(W32->GetCxBorder(), W32->GetXPerInchScreenDC());
_rcViewInset.right = W32->DeviceToHimetric(W32->GetCxBorder(), W32->GetXPerInchScreenDC());
}
}
///////////////////////////////// East Asia Support //////////////////////////////////////
HIMC CTxtWinHost::TxImmGetContext()
{
#ifndef NOFEPROCESSING
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::TxImmGetContext");
HIMC himc;
Assert(_hwnd);
himc = ImmGetContext(_hwnd, FALSE);
return himc;
#else
return NULL;
#endif
}
void CTxtWinHost::TxImmReleaseContext(
HIMC himc)
{
#ifndef NOFEPROCESSING
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::TxImmReleaseContext");
Assert(_hwnd);
ImmReleaseContext(_hwnd, himc, FALSE);
#endif
}
void CTxtWinHost::HostRevokeDragDrop()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::HostRevokeDragDrop");
if(_fRegisteredForDrop)
{
// Note that if the revoke fails we want to know about this in debug
// builds so we can fix any problems. In retail, we can't really do
// so we just ignore it.
#if !defined(NOFULLDEBUG) && defined(DEBUG)
HRESULT hr =
#endif // DEBUG
RevokeDragDrop(_hwnd);
#if !defined(NOFULLDEBUG) && defined(DEBUG)
TESTANDTRACEHR(hr);
#endif // DEBUG
_fRegisteredForDrop = FALSE;
}
}
void CTxtWinHost::HostRegisterDragDrop()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::RegisterDragDrop");
IDropTarget *pdt = NULL;
if(!_fRegisteredForDrop && _pserv->TxGetDropTarget(&pdt) == NOERROR)
{
// The most likely reason for RegisterDragDrop to fail is some kind of
// bug in our program.
HRESULT hr = RegisterDragDrop(_hwnd, pdt);
if(hr == NOERROR)
_fRegisteredForDrop = TRUE;
if (pdt)
pdt->Release();
}
}
#define cmultBorder 1
void CTxtWinHost::OnSunkenWindowPosChanging(
HWND hwnd,
WINDOWPOS *pwndpos)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnSunkenWindowPosChanging");
if(IsWindowVisible(hwnd))
{
RECT rc;
HWND hwndParent;
GetWindowRect(hwnd, &rc);
InflateRect(&rc, W32->GetCxBorder() * cmultBorder, W32->GetCyBorder() * cmultBorder);
hwndParent = GetParent(hwnd);
MapWindowPoints(HWND_DESKTOP, hwndParent, (POINT *) &rc, 2);
InvalidateRect(hwndParent, &rc, TRUE);
}
}
LRESULT CTxtWinHost::OnSize(
HWND hwnd,
WORD fwSizeType,
int nWidth,
int nHeight)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnSize");
BOOL fIconic = GetIconic(hwnd);
DWORD dw = TXTBIT_CLIENTRECTCHANGE;
if(_sWidth != nWidth && !fIconic && !_fIconic)
{
_sWidth = (short)nWidth; // Be sure to update _sWidth
dw = TXTBIT_EXTENTCHANGE;
}
if(!_fVisible)
{
if(!fIconic)
_fResized = TRUE;
}
else if(!fIconic)
{
// We use this property because this will force a recalc.
// We don't actually recalc on a client rect change because
// most of the time it is pointless. We force one here because
// some applications use size changes to calculate the optimal
// size of the window.
_pserv->OnTxPropertyBitsChange(dw, dw);
if(_fIconic)
{
TRACEINFOSZ("Restoring from iconic");
InvalidateRect(hwnd, NULL, TRUE);
}
}
_fIconic = fIconic; // Update _fIconic
return 0;
}
HRESULT CTxtWinHost::OnTxVisibleChange(
BOOL fVisible)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEINTERN, "CTxtWinHost::OnTxVisibleChange");
_fVisible = fVisible;
if(!_fVisible && _fResized)
{
RECT rc;
// Control was resized while hidden, need to really resize now
TxGetClientRect(&rc);
_fResized = FALSE;
_pserv->OnTxPropertyBitsChange(TXTBIT_CLIENTRECTCHANGE,
TXTBIT_CLIENTRECTCHANGE);
}
return S_OK;
}
//////////////////////////// ITextHost Interface ////////////////////////////
// @doc EXTERNAL
/*
* CTxtWinHost::TxGetDC()
*
* @mfunc
* Abstracts GetDC so Text Services does not need a window handle.
*
* @rdesc
* A DC or NULL in the event of an error.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
HDC CTxtWinHost::TxGetDC()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetDC");
Assert(_hwnd);
return ::GetDC(_hwnd);
}
/*
* CTxtWinHost::TxReleaseDC (hdc)
*
* @mfunc
* Release DC gotten by TxGetDC.
*
* @rdesc
* 1 - HDC was released. <nl>
* 0 - HDC was not released. <nl>
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
int CTxtWinHost::TxReleaseDC(
HDC hdc) //@parm DC to release
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxReleaseDC");
Assert(_hwnd);
return ::ReleaseDC (_hwnd, hdc);
}
/*
* CTxtWinHost::TxShowScrollBar (fnBar, fShow)
*
* @mfunc
* Shows or Hides scroll bar in Text Host window
*
* @rdesc
* TRUE on success, FALSE otherwise
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxShowScrollBar(
INT fnBar, //@parm Specifies scroll bar(s) to be shown or hidden
BOOL fShow) //@parm Specifies whether scroll bar is shown or hidden
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxShowScrollBar");
Assert(_hwnd);
LONG nMax;
if(fnBar == SB_HORZ)
_pserv->TxGetHScroll(NULL, &nMax, NULL, NULL, NULL);
else
_pserv->TxGetVScroll(NULL, &nMax, NULL, NULL, NULL);
return W32->ShowScrollBar(_hwnd, fnBar, fShow, nMax);
}
/*
* CTxtWinHost::TxEnableScrollBar (fuSBFlags, fuArrowflags)
*
* @mfunc
* Enables or disables one or both scroll bar arrows
* in Text Host window.
*
* @rdesc
* If the arrows are enabled or disabled as specified, the return
* value is TRUE. If the arrows are already in the requested state or an
* error occurs, the return value is FALSE.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxEnableScrollBar (
INT fuSBFlags, //@parm Specifies scroll bar type
INT fuArrowflags) //@parm Specifies whether and which scroll bar arrows
// are enabled or disabled
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxEnableScrollBar");
Assert(_hwnd);
return W32->EnableScrollBar(_hwnd, fuSBFlags, fuArrowflags);
}
/*
* CTxtWinHost::TxSetScrollRange (fnBar, nMinPos, nMaxPos, fRedraw)
*
* @mfunc
* Sets the minimum and maximum position values for the specified
* scroll bar in the text host window.
*
* @rdesc
* If the arrows are enabled or disabled as specified, the return value
* is TRUE. If the arrows are already in the requested state or an error
* occurs, the return value is FALSE.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxSetScrollRange(
INT fnBar, //@parm Scroll bar flag
LONG nMinPos, //@parm Minimum scrolling position
INT nMaxPos, //@parm Maximum scrolling position
BOOL fRedraw) //@parm Specifies whether scroll bar should be redrawn
{ // to reflect change
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetScrollRange");
Assert(_hwnd);
if(NULL == _pserv)
{
// We are initializing so do this instead of callback
return ::SetScrollRange(_hwnd, fnBar, nMinPos, nMaxPos, fRedraw);
}
SetScrollInfo(fnBar, fRedraw);
return TRUE;
}
/*
* CTxtWinHost::TxSetScrollPos (fnBar, nPos, fRedraw)
*
* @mfunc
* Tells Text host to set the position of the scroll box (thumb) in the
* specified scroll bar and, if requested, redraws the scroll bar to
* reflect the new position of the scroll box.
*
* @rdesc
* TRUE on success; FALSE otherwise.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxSetScrollPos (
INT fnBar, //@parm Scroll bar flag
INT nPos, //@parm New position in scroll box
BOOL fRedraw) //@parm Redraw flag
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetScrollPos");
Assert(_hwnd);
if(NULL == _pserv)
{
// We are initializing so do this instead of callback
return ::SetScrollPos(_hwnd, fnBar, nPos, fRedraw);
}
SetScrollInfo(fnBar, fRedraw);
return TRUE;
}
/*
* CTxtWinHost::TxInvalidateRect (prc, fMode)
*
* @mfunc
* Adds a rectangle to the Text Host window's update region
*
* @comm
* This function may be called while inactive; however the host
* implementation is free to invalidate an area greater than
* the requested rect.
*
* Note: In transparent mode, we need to pass TRUE to InvalidateRect.
* However, in all other cases, it is best to pass FALSE, because we always
* repaint the backgrounds of our displays.
*/
void CTxtWinHost::TxInvalidateRect(
LPCRECT prc, //@parm Address of rectangle coordinates
BOOL fMode) //@parm Erase background flag
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxInvalidateRect");
Assert(_hwnd);
if(!_fVisible)
{
// There doesn't seem to be a deterministic way to determine whether
// our window is visible or not via message notifications. Therefore,
// we check this each time in case it might have changed.
_fVisible = IsWindowVisible(_hwnd);
if(_fVisible)
OnTxVisibleChange(TRUE);
}
// Don't bother with invalidating rect if we aren't visible
if(_fVisible)
{
if(IsTransparentMode())
{
RECT rcParent;
HWND hParent = ::GetParent(_hwnd);
Assert(hParent);
// For transparent mode, we need to invalidate the parent
// so it will paint the background.
if(prc)
rcParent = *prc;
else
TxGetClientRect(&rcParent);
::MapWindowPoints(_hwnd, hParent, (LPPOINT)&rcParent, 2);
::InvalidateRect(hParent, &rcParent, TRUE);
// ::HideCaret(_hwnd);
}
::InvalidateRect(_hwnd, prc, FALSE);
}
}
/*
* CTxtWinHost::TxViewChange (fUpdate)
*
* @mfunc
* Notify Text Host that update region should be repainted.
*
* @comm
* It is the responsibility of the text services to call
* TxViewChanged every time it decides that it's visual representation
* has changed, regardless of whether the control is active or
* not. If the control is active, the text services has the additional
* responsibility of making sure the controls window is updated.
* It can do this in a number of ways: 1) get a DC for the control's
* window and start blasting pixels (TxGetDC and TxReleaseDC), 2)
* invalidate the control's window (TxInvalidate), or 3) scroll
* the control's window (TxScrollWindowEx).
*
* Text services can choose to call TxViewChange after it has
* performed any operations to update the active view and pass a
* true along with the call. By passing true, the text host
* calls UpdateWindow to make sure any unpainted areas of the
* active control are repainted.
*/
void CTxtWinHost::TxViewChange(
BOOL fUpdate) //@parm TRUE = call update window
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxViewChange");
Assert(_hwnd);
// Don't bother with paint since we aren't visible
if(_fVisible)
{
// For updates requests that are FALSE, we will let the next WM_PAINT
// message pick up the draw.
if(fUpdate)
{
if(IsTransparentMode())
{
HWND hParent = GetParent (_hwnd);
Assert(hParent);
// For transparent mode, we need to update the parent first
// before we can update ourself. Otherwise, what we painted will
// be erased by the parent's background later.
::UpdateWindow (hParent);
}
::UpdateWindow (_hwnd);
}
}
}
/*
* CTxtWinHost::TxCreateCaret (hbmp, xWidth, yHeight)
*
* @mfunc
* Create new shape for Text Host's caret
*
* @rdesc
* TRUE on success, FALSE otherwise.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxCreateCaret(
HBITMAP hbmp, //@parm Handle of bitmap for caret shape
INT xWidth, //@parm Caret width
INT yHeight) //@parm Caret height
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxCreateCaret");
Assert(_hwnd);
return ::CreateCaret (_hwnd, hbmp, xWidth, yHeight);
}
/*
* CTxtWinHost::TxShowCaret (fShow)
*
* @mfunc
* Make caret visible/invisible at caret position in Text Host window.
*
* @rdesc
* TRUE - call succeeded <nl>
* FALSE - call failed <nl>
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxShowCaret(
BOOL fShow) //@parm Flag whether caret is visible
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxShowCaret");
return fShow ? ::ShowCaret(_hwnd) : ::HideCaret(_hwnd);
}
/*
* CTxtWinHost::TxSetCaretPos (x, y)
*
* @mfunc
* Move caret position to specified coordinates in Text Host window.
*
* @rdesc
* TRUE - call succeeded <nl>
* FALSE - call failed <nl>
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
BOOL CTxtWinHost::TxSetCaretPos(
INT x, //@parm Horizontal position (in client coordinates)
INT y) //@parm Vertical position (in client coordinates)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetCaretPos");
return ::SetCaretPos(x, y);
}
/*
* CTxtWinHost::TxSetTimer (idTimer, uTimeout)
*
* @mfunc
* Request Text Host to creates a timer with specified time out.
*
* @rdesc
* TRUE - call succeeded <nl>
* FALSE - call failed <nl>
*/
BOOL CTxtWinHost::TxSetTimer(
UINT idTimer, //@parm Timer identifier
UINT uTimeout) //@parm Timeout in msec
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetTimer");
Assert(_hwnd);
return ::SetTimer(_hwnd, idTimer, uTimeout, NULL);
}
/*
* CTxtWinHost::TxKillTimer (idTimer)
*
* @mfunc
* Destroy specified timer
*
* @rdesc
* TRUE - call succeeded <nl>
* FALSE - call failed <nl>
*
* @comm
* This method may be called at any time irrespective of active versus
* inactive state.
*/
void CTxtWinHost::TxKillTimer(
UINT idTimer) //@parm id of timer
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxKillTimer");
Assert(_hwnd);
::KillTimer(_hwnd, idTimer);
}
/*
* CTxtWinHost::TxScrollWindowEx (dx, dy, lprcScroll, lprcClip, hrgnUpdate,
* lprcUpdate, fuScroll)
* @mfunc
* Request Text Host to scroll the content of the specified client area
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
void CTxtWinHost::TxScrollWindowEx (
INT dx, //@parm Amount of horizontal scrolling
INT dy, //@parm Amount of vertical scrolling
LPCRECT lprcScroll, //@parm Scroll rectangle
LPCRECT lprcClip, //@parm Clip rectangle
HRGN hrgnUpdate, //@parm Handle of update region
LPRECT lprcUpdate, //@parm Update rectangle
UINT fuScroll) //@parm Scrolling flags
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxScrollWindowEx");
Assert(_hwnd);
::ScrollWindowEx(_hwnd, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate, fuScroll);
}
/*
* CTxtWinHost::TxSetCapture (fCapture)
*
* @mfunc
* Set mouse capture in Text Host's window.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may do nothing.
*/
void CTxtWinHost::TxSetCapture(
BOOL fCapture) //@parm Whether to get or release capture
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetCapture");
Assert(_hwnd);
if (fCapture)
::SetCapture(_hwnd);
else
::ReleaseCapture();
}
/*
* CTxtWinHost::TxSetFocus ()
*
* @mfunc
* Set focus in text host window.
*
* @comm
* This method is only valid when the control is in-place active;
* calls while inactive may fail.
*/
void CTxtWinHost::TxSetFocus()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetFocus");
Assert(_hwnd);
::SetFocus(_hwnd);
}
/*
* CTxtWinHost::TxSetCursor (hcur, fText)
*
* @mfunc
* Establish a new cursor shape in the Text Host's window.
*
* @comm
* This method may be called at any time, irrespective of
* active vs. inactive state.
*
* ITextHost::TxSetCursor should be called back by the Text Services
* to actually set the mouse cursor. If the fText parameter is TRUE,
* Text Services is trying to set the "text" cursor (cursor over text
* that is not selected, currently an IBEAM). In that case, the host
* can set it to whatever the control MousePointer property is. This is
* required by VB compatibility since, via the MousePointer property,
* the VB programmer has control over the shape of the mouse cursor,
* whenever it would normally be set to an IBEAM.
*/
void CTxtWinHost::TxSetCursor(
HCURSOR hcur, //@parm Handle to cursor
BOOL fText) //@parm Indicates caller wants to set text cursor
// (IBeam) if true.
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxSetCursor");
::SetCursor(hcur);
}
/*
* CTxtWinHost::TxScreenToClient (lppt)
*
* @mfunc
* Convert screen coordinates to Text Host window coordinates.
*
* @rdesc
* TRUE - call succeeded <nl>
* FALSE - call failed <nl>
*/
BOOL CTxtWinHost::TxScreenToClient(
LPPOINT lppt) //@parm Coordinates for point
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxScreenToClient");
Assert(_hwnd);
return ::ScreenToClient(_hwnd, lppt);
}
/*
* CTxtWinHost::TxClientToScreen (lppt)
*
* @mfunc
* Convert Text Host coordinates to screen coordinates
*
* @rdesc
* TRUE - call succeeded <nl>
* FALSE - call failed <nl>
*
* @comm
* This call is valid at any time, although it is allowed to
* fail. In general, if text services has coordinates it needs
* to translate from client coordinates (e.g. for TOM's
* PointFromRange method) the text services will actually be
* visible.
*
* However, if no conversion is possible, then the method will fail.
*/
BOOL CTxtWinHost::TxClientToScreen(
LPPOINT lppt) //@parm Client coordinates to convert.
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxClientToScreen");
Assert(_hwnd);
return ::ClientToScreen(_hwnd, lppt);
}
/*
* CTxtWinHost::TxActivate (plOldState)
*
* @mfunc
* Notify Text Host that control is active
*
* @rdesc
* S_OK - call succeeded. <nl>
* E_FAIL - activation is not possible at this time
*
* @comm
* It is legal for the host to refuse an activation request;
* the control may be minimized and thus invisible, for instance.
*
* The caller should be able to gracefully handle failure to activate.
*
* Calling this method more than once does not cumulate; only
* once TxDeactivate call is necessary to deactive.
*
* This function returns an opaque handle in <p plOldState>. The caller
* (Text Services) should hang onto this handle and return it in a
* subsequent call to TxDeactivate.
*/
HRESULT CTxtWinHost::TxActivate(
LONG *plOldState) //@parm Where to put previous activation state
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxActivate");
return S_OK;
}
/*
* CTxtWinHost::TxDeactivate (lNewState)
*
* @mfunc
* Notify Text Host that control is now inactive
*
* @rdesc
* S_OK - call succeeded. <nl>
* E_FAIL <nl>
*
* @comm
* Calling this method more than once does not cumulate
*/
HRESULT CTxtWinHost::TxDeactivate(
LONG lNewState) //@parm New state (typically value returned by
// TxActivate
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxDeactivate");
return S_OK;
}
/*
* CTxtWinHost::TxGetClientRect (prc)
*
* @mfunc
* Retrieve client coordinates of Text Host's client area.
*
* @rdesc
* HRESULT = (success) ? S_OK : E_FAIL
*/
HRESULT CTxtWinHost::TxGetClientRect(
LPRECT prc) //@parm Where to put client coordinates
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetClientRect");
Assert(_hwnd && prc);
return ::GetClientRect(_hwnd, prc) ? S_OK : E_FAIL;
}
/*
* CTxtWinHost::TxGetViewInset (prc)
*
* @mfunc
* Get inset for Text Host window. Inset is the "white space"
* around text.
*
* @rdesc
* HRESULT = NOERROR
*
* @comm
* The Inset rectangle is not strictly a rectangle. The top, bottom,
* left, and right fields of the rect structure indicate how far in
* each direction drawing should be inset. Inset sizes are in client
* coordinates.
*/
HRESULT CTxtWinHost::TxGetViewInset(
LPRECT prc) //@parm Where to put inset rectangle
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetViewInset");
Assert(prc);
*prc = _rcViewInset;
return NOERROR;
}
/*
* CTxtWinHost::TxGetCharFormat (ppCF)
*
* @mfunc
* Get Text Host's default character format
*
* @rdesc
* HRESULT = E_NOTIMPL (not needed in simple Windows host, since text
* services provides desired default)
*
* @comm
* The callee retains ownwership of the charformat returned. However,
* the pointer returned must remain valid until the callee notifies
* Text Services via OnTxPropertyBitsChange that the default character
* format has changed.
*/
HRESULT CTxtWinHost::TxGetCharFormat(
const CHARFORMAT **ppCF) //@parm Where to put ptr to default
// character format
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetCharFormat");
return E_NOTIMPL;
}
/*
* CTxtWinHost::TxGetParaFormat (ppPF)
*
* @mfunc
* Get Text Host default paragraph format
*
* @rdesc
* HRESULT = E_NOTIMPL (not needed in simple Windows host, since text
* services provides desired default)
*
* @comm
* The host object (callee) retains ownership of the PARAFORMAT returned.
* However, the pointer returned must remain valid until the host notifies
* Text Services (the caller) via OnTxPropertyBitsChange that the default
* paragraph format has changed.
*/
HRESULT CTxtWinHost::TxGetParaFormat(
const PARAFORMAT **ppPF) //@parm Where to put ptr to default
// paragraph format
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetParaFormat");
return E_NOTIMPL;
}
/*
* CTxtWinHost::TxGetSysColor (nIndex)
*
* @mfunc
* Get specified color identifer from Text Host.
*
* @rdesc
* Color identifier
*
* @comm
* Note that the color returned may be *different* than the
* color that would be returned from a call to GetSysColor.
* This allows hosts to override default system behavior.
*
* Needless to say, hosts should be very careful about overriding
* normal system behavior as it could result in inconsistent UI
* (particularly with respect to Accessibility options).
*/
COLORREF CTxtWinHost::TxGetSysColor(
int nIndex) //@parm Color to get, same parameter as
// GetSysColor Win32 API
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetSysColor");
if (!_fDisabled ||
nIndex != COLOR_WINDOW && nIndex != COLOR_WINDOWTEXT)
{
// This window is not disabled or the color is not interesting
// in the disabled case.
return (nIndex == COLOR_WINDOW && _fNotSysBkgnd)
? _crBackground : GetSysColor(nIndex);
}
// Disabled case
if (COLOR_WINDOWTEXT == nIndex)
{
// Color of text for disabled window
return GetSysColor(COLOR_GRAYTEXT);
}
// Background color for disabled window
return GetSysColor(COLOR_3DFACE);
}
/*
* CTxtWinHost::TxGetBackStyle (pstyle)
*
* @mfunc
* Get Text Host background style.
*
* @rdesc
* HRESULT = S_OK
*
* @xref <e TXTBACKSTYLE>
*/
HRESULT CTxtWinHost::TxGetBackStyle(
TXTBACKSTYLE *pstyle) //@parm Where to put background style
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetBackStyle");
*pstyle = (_dwExStyle & WS_EX_TRANSPARENT)
? TXTBACK_TRANSPARENT : TXTBACK_OPAQUE;
return NOERROR;
}
/*
* CTxtWinHost::TxGetMaxLength (pLength)
*
* @mfunc
* Get Text Host's maximum allowed length.
*
* @rdesc
* HRESULT = S_OK
*
* @comm
* This method parallels the EM_LIMITTEXT message.
* If INFINITE (0xFFFFFFFF) is returned, then text services
* will use as much memory as needed to store any given text.
*
* If the limit returned is less than the number of characters
* currently in the text engine, no data is lost. Instead,
* no edits will be allowed to the text *other* than deletion
* until the text is reduced to below the limit.
*/
HRESULT CTxtWinHost::TxGetMaxLength(
DWORD *pLength) //@parm Maximum allowed length, in number of
// characters
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetMaxLength");
AssertSz(FALSE, "CTxtWinHost::TxGetMaxLength why is this being called?");
return NOERROR;
}
/*
* CTxtWinHost::TxGetScrollBars (pdwScrollBar)
*
* @mfunc
* Get Text Host's scroll bars supported.
*
* @rdesc
* HRESULT = S_OK
*
* @comm
* <p pdwScrollBar> is filled with a boolean combination of the
* window styles related to scroll bars. Specifically, these are:
*
* WS_VSCROLL <nl>
* WS_HSCROLL <nl>
* ES_AUTOVSCROLL <nl>
* ES_AUTOHSCROLL <nl>
* ES_DISABLENOSCROLL <nl>
*/
HRESULT CTxtWinHost::TxGetScrollBars(
DWORD *pdwScrollBar) //@parm Where to put scrollbar information
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetScrollBars");
*pdwScrollBar = _dwStyle & (WS_VSCROLL | WS_HSCROLL | ES_AUTOVSCROLL |
ES_AUTOHSCROLL | ES_DISABLENOSCROLL);
return NOERROR;
}
/*
* CTxtWinHost::TxGetPasswordChar (pch)
*
* @mfunc
* Get Text Host's password character.
*
* @rdesc
* HRESULT = (password character not enabled) ? S_FALSE : S_OK
*
* @comm
* The password char will only be shown if the TXTBIT_USEPASSWORD bit
* is enabled in TextServices. If the password character changes,
* re-enable the TXTBIT_USEPASSWORD bit via
* ITextServices::OnTxPropertyBitsChange.
*/
HRESULT CTxtWinHost::TxGetPasswordChar(
TCHAR *pch) //@parm Where to put password character
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetPasswordChar");
*pch = _chPassword;
return NOERROR;
}
/*
* CTxtWinHost::TxGetAcceleratorPos (pcp)
*
* @mfunc
* Get special character to use for underlining accelerator character.
*
* @rdesc
* Via <p pcp>, returns character position at which underlining
* should occur. -1 indicates that no character should be underlined.
* Return value is an HRESULT (usually S_OK).
*
* @comm
* Accelerators allow keyboard shortcuts to various UI elements (like
* buttons. Typically, the shortcut character is underlined.
*
* This function tells Text Services which character is the accelerator
* and thus should be underlined. Note that Text Services will *not*
* process accelerators; that is the responsiblity of the host.
*
* This method will typically only be called if the TXTBIT_SHOWACCELERATOR
* bit is set in text services.
*
* Note that *any* change to the text in text services will result in the
* invalidation of the accelerator underlining. In this case, it is the
* host's responsibility to recompute the appropriate character position
* and inform text services that a new accelerator is available.
*/
HRESULT CTxtWinHost::TxGetAcceleratorPos(
LONG *pcp) //@parm Out parm to receive cp of character to underline
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetAcceleratorPos");
*pcp = -1;
return S_OK;
}
/*
* CTxtWinHost::OnTxCharFormatChange
*
* @mfunc
* Set default character format for the Text Host.
*
* @rdesc
* S_OK - call succeeded. <nl>
* E_INVALIDARG <nl>
* E_FAIL <nl>
*/
HRESULT CTxtWinHost::OnTxCharFormatChange(
const CHARFORMAT *pcf) //@parm New default character format
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::OnTxCharFormatChange");
return S_OK;
}
/*
* CTxtWinHost::OnTxParaFormatChange
*
* @mfunc
* Set default paragraph format for the Text Host.
*
* @rdesc
* S_OK - call succeeded. <nl>
* E_INVALIDARG <nl>
* E_FAIL <nl>
*/
HRESULT CTxtWinHost::OnTxParaFormatChange(
const PARAFORMAT *ppf) //@parm New default paragraph format
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::OnTxParaFormatChange");
return S_OK;
}
/*
* CTxtWinHost::TxGetPropertyBits (dwMask, dwBits)
*
* @mfunc
* Get the bit property settings for Text Host.
*
* @rdesc
* S_OK
*
* @comm
* This call is valid at any time, for any combination of
* requested property bits. <p dwMask> may be used by the
* caller to request specific properties.
*/
HRESULT CTxtWinHost::TxGetPropertyBits(
DWORD dwMask, //@parm Mask of bit properties to get
DWORD *pdwBits) //@parm Where to put bit values
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetPropertyBits");
// FUTURE: Obvious optimization is to save bits in host the same way that
// they are returned and just return them instead of this mess.
// Note: this RichEdit host never sets TXTBIT_SHOWACCELERATOR or
// TXTBIT_SAVESELECTION. They are currently only used by Forms^3 host.
// This host is always rich text.
DWORD dwProperties = TXTBIT_RICHTEXT | TXTBIT_ALLOWBEEP;
#ifdef DEBUG
// make sure that TS doesn't think it's plain text mode when
// we return TXTBIT_RICHTEXT
if((dwMask & TXTBIT_RICHTEXT) && _pserv)
{
DWORD mode;
mode = _pserv->TxSendMessage(EM_GETTEXTMODE, 0, 0, NULL);
Assert(mode == TM_RICHTEXT);
}
#endif // DEBUG
if(_dwStyle & ES_MULTILINE)
dwProperties |= TXTBIT_MULTILINE;
if(_dwStyle & ES_READONLY)
dwProperties |= TXTBIT_READONLY;
if(_dwStyle & ES_PASSWORD)
dwProperties |= TXTBIT_USEPASSWORD;
if(!(_dwStyle & ES_NOHIDESEL))
dwProperties |= TXTBIT_HIDESELECTION;
if(_fEnableAutoWordSel)
dwProperties |= TXTBIT_AUTOWORDSEL;
if(!(_dwStyle & ES_AUTOHSCROLL))
dwProperties |= TXTBIT_WORDWRAP;
if(_dwStyle & ES_VERTICAL)
dwProperties |= TXTBIT_VERTICAL;
if(_dwStyle & ES_NOOLEDRAGDROP)
dwProperties |= TXTBIT_DISABLEDRAG;
*pdwBits = dwProperties & dwMask;
return NOERROR;
}
/*
* CTxtWinHost::TxNotify (iNotify, pv)
*
* @mfunc
* Notify Text Host of various events. Note that there are
* two basic categories of events, "direct" events and
* "delayed" events. Direct events are sent immediately as
* they need some processing: EN_PROTECTED is a canonical
* example. Delayed events are sent after all processing
* has occurred; the control is thus in a "stable" state.
* EN_CHANGE, EN_ERRSPACE, EN_SELCHANGED are examples
* of delayed notifications.
*
*
* @rdesc
* S_OK - call succeeded <nl>
* S_FALSE -- success, but do some different action
* depending on the event type (see below).
*
* @comm
* The notification events are the same as the notification
* messages sent to the parent window of a richedit window.
* The firing of events may be controlled with a mask set via
* the EM_SETEVENTMASK message.
*
* In general, is legal to make any calls to text services while
* processing this method; however, implementors are cautioned
* to avoid excessive recursion.
*
* Here is the complete list of notifications that may be
* sent and a brief description of each:
*
* <p EN_CHANGE> Sent when some data in the edit control
* changes (such as text or formatting). Controlled by the
* ENM_CHANGE event mask. This notification is sent _after_
* any screen updates have been requested.
*
* <p EN_CORRECTTEXT> PenWin only; currently unused.
*
* <p EN_DROPFILES> If the client registered the edit
* control via DragAcceptFiles, this event will be sent when
* a WM_DROPFILES or DragEnter(CF_HDROP) message is received.
* If S_FALSE is returned, the drop will be ignored, otherwise,
* the drop will be processed. The ENM_DROPFILES mask
* controls this event notification.
*
* <p EN_ERRSPACE> Sent when the edit control cannot
* allocate enough memory. No additional data is sent and
* there is no mask for this event.
*
* <p EN_HSCROLL> Sent when the user clicks on an edit
* control's horizontal scroll bar, but before the screen
* is updated. No additional data is sent. The ENM_SCROLL
* mask controls this event.
*
* <p EN_IMECHANGE> unused
*
* <p EN_KILLFOCUS> Sent when the edit control looses focus.
* No additional data is sent and there is no mask.
*
* <p EN_MAXTEXT> Sent when the current text insertion
* has exceeded the specified number of characters for the
* edit control. The text insertion has been truncated.
* There is no mask for this event.
*
* <p EN_MSGFILTER> NB!!! THIS MESSAGE IS NOT SENT TO
* TxNotify, but is included here for completeness. With
* ITextServices::TxSendMessage, client have complete
* flexibility in filtering all window messages.
*
* Sent on a keyboard or mouse event
* in the control. A MSGFILTER data structure is sent,
* containing the msg, wparam and lparam. If S_FALSE is
* returned from this notification, the msg is processed by
* TextServices, otherwise, the message is ignored. Note
* that in this case, the callee has the opportunity to modify
* the msg, wparam, and lparam before TextServices continues
* processing. The ENM_KEYEVENTS and ENM_MOUSEEVENTS masks
* control this event for the respective event types.
*
* <p EN_OLEOPFAILED> Sent when an OLE call fails. The
* ENOLEOPFAILED struct is passed with the index of the object
* and the error code. Mask value is nothing.
*
* <p EN_PROTECTED> Sent when the user is taking an
* action that would change a protected range of text. An
* ENPROTECTED data structure is sent, indicating the range
* of text affected and the window message (if any) affecting
* the change. If S_FALSE is returned, the edit will fail.
* The ENM_PROTECTED mask controls this event.
*
* <p EN_REQUESTRESIZE> Sent when a control's contents are
* either smaller or larger than the control's window size.
* The client is responsible for resizing the control. A
* REQRESIZE structure is sent, indicating the new size of
* the control. NB! Only the size is indicated in this
* structure; it is the host's responsibility to do any
* translation necessary to generate a new client rectangle.
* The ENM_REQUESTRESIZE mask controls this event.
*
* <p EN_SAVECLIPBOARD> Sent when an edit control is being
* destroyed, the callee should indicate whether or not
* OleFlushClipboard should be called. Data indicating the
* number of characters and objects to be flushed is sent
* in the ENSAVECLIPBOARD data structure.
* Mask value is nothing.
*
* <p EN_SELCHANGE> Sent when the current selection has
* changed. A SELCHANGE data structure is also sent, which
* indicates the new selection range at the type of data
* the selection is currently over. Controlled via the
* ENM_SELCHANGE mask.
*
* <p EN_SETFOCUS> Sent when the edit control receives the
* keyboard focus. No extra data is sent; there is no mask.
*
* <p EN_STOPNOUNDO> Sent when an action occurs for which
* the control cannot allocate enough memory to maintain the
* undo state. If S_FALSE is returned, the action will be
* stopped; otherwise, the action will continue.
*
* <p EN_UPDATE> Sent before an edit control requests a
* redraw of altered data or text. No additional data is
* sent. This event is controlled via the ENM_UPDATE mask.
*
* <p EN_VSCROLL> Sent when the user clicks an edit control's
* vertical scrollbar bar before the screen is updated.
* Controlled via the ENM_SCROLL mask; no extra data is sent.
*
* <p EN_LINK> Sent when a mouse event (or WM_SETCURSOR) happens
* over a range of text that has the EN_LINK mask bit set.
* An ENLINK data structure will be sent with relevant info.
*/
HRESULT CTxtWinHost::TxNotify(
DWORD iNotify, //@parm Event to notify host of. One of the
// EN_XXX values from Win32, e.g., EN_CHANGE
void *pv) //@parm In-only parameter with extra data. Type
// dependent on <p iNotify>
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxNotify");
HRESULT hr = NOERROR;
LONG nId;
NMHDR * phdr;
REQRESIZE * preq;
RECT rcOld;
// We assume here that TextServices has already masked out notifications,
// so if we get one here, it should be sent
if(_hwndParent)
{
nId = GetWindowLong(_hwnd, GWL_ID);
// First, handle WM_NOTIFY style notifications
switch(iNotify)
{
case EN_REQUESTRESIZE:
// Need to map new size into correct rectangle
Assert(pv);
GetWindowRect(_hwnd, &rcOld);
MapWindowPoints(HWND_DESKTOP, _hwndParent, (POINT *) &rcOld, 2);
preq = (REQRESIZE *)pv;
preq->rc.top = rcOld.top;
preq->rc.left = rcOld.left;
preq->rc.right += rcOld.left;
preq->rc.bottom += rcOld.top;
// FALL-THROUGH!!
case EN_DROPFILES:
case EN_MSGFILTER:
case EN_OLEOPFAILED:
case EN_PROTECTED:
case EN_SAVECLIPBOARD:
case EN_SELCHANGE:
case EN_STOPNOUNDO:
case EN_LINK:
case EN_OBJECTPOSITIONS:
case EN_DRAGDROPDONE:
case EN_LOWFIRTF:
case EN_CLIPFORMAT:
if(pv) // Fill out NMHDR portion of pv
{
phdr = (NMHDR *)pv;
phdr->hwndFrom = _hwnd;
phdr->idFrom = nId;
phdr->code = iNotify;
}
if(SendMessage(_hwndParent, WM_NOTIFY, (WPARAM) nId, (LPARAM) pv))
hr = S_FALSE;
break;
default:
SendMessage(_hwndParent, WM_COMMAND,
GET_WM_COMMAND_MPS(nId, _hwnd, iNotify));
}
}
return hr;
}
/*
* CTxtWinHost::TxGetExtent (lpExtent)
*
* @mfunc
* Return native size of the control in HIMETRIC
*
* @rdesc
* S_OK <nl>
* some failure code <nl>
*
* @comm
* This method is used by Text Services to implement zooming.
* Text Services would derive the zoom factor from the ratio between
* the himetric and device pixel extent of the client rectangle.
*
* [vertical zoom factor] = [pixel height of the client rect] * 2540
* / [himetric vertical extent] * [pixel per vertical inch (from DC)]
*
* If the vertical and horizontal zoom factors are not the same, Text
* Services could ignore the horizontal zoom factor and assume it is
* the same as the vertical one.
*/
HRESULT CTxtWinHost::TxGetExtent(
LPSIZEL lpExtent) //@parm Extent in himetric
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::TxGetExtent");
AssertSz(lpExtent, "CTxtWinHost::TxGetExtent Invalid lpExtent");
// We could implement the TxGetExtent in the following way. However, the
// call to this in ITextServices is implemented in such a way that it
// does something sensible in the face of an error in this call. That
// something sensible is that it sets the extent equal to the current
// client rectangle which is what the following does in a rather convoluted
// manner. Therefore, we dump the following and just return an error.
#if 0
// The window's host extent is always the same as the client
// rectangle.
RECT rc;
HRESULT hr = TxGetClientRect(&rc);
// Get our client rectangle
if(SUCCEEDED(hr))
{
// Calculate the length & convert to himetric
lpExtent->cx = DXtoHimetricX(rc.right - rc.left, W32->GetXPerInchScreenDC());
lpExtent->cy = DYtoHimetricY(rc.bottom - rc.top, W32->GetYPerInchScreenDC());
}
return hr;
#endif // 0
return E_NOTIMPL;
}
HRESULT CTxtWinHost::TxEBookLoadImage( LPWSTR lpszName, LPARAM * pID, SIZE * psize, DWORD *pdwFlags)
{
return E_NOTIMPL;
}
HRESULT CTxtWinHost::TxEBookImageDraw(LPARAM ID, HDC hdc, POINT *topLeft, RECT *prcRenderint,
BOOL fSelected)
{
return E_NOTIMPL;
}
HRESULT CTxtWinHost::TxGetHorzExtent(LONG *plHorzExtent)
{
return E_NOTIMPL;
}
/*
* CTxtWinHost::TxGetSelectionBarWidth (lSelBarWidth)
*
* @mfunc
* Returns size of selection bar in HIMETRIC
*
* @rdesc
* S_OK <nl>
*/
HRESULT CTxtWinHost::TxGetSelectionBarWidth (
LONG *lSelBarWidth) //@parm Where to return selection bar width
// in HIMETRIC
{
*lSelBarWidth = (_dwStyle & ES_SELECTIONBAR) ? W32->GetDxSelBar() : 0;
return S_OK;
}
//
// ITextHost2 methods
//
/*
* CTxtWinHost::TxIsDoubleClickPending
*
* @mfunc Look into the message queue for this hwnd and see if a
* double click is pending. This enables TextServices to
* effeciently transition between two inplace active objects.
*
* @rdesc BOOL
*/
BOOL CTxtWinHost::TxIsDoubleClickPending()
{
MSG msg;
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN,
"CTxtWinHost::TxIsDoubleClickPending");
if(PeekMessage(&msg, _hwnd, WM_LBUTTONDBLCLK, WM_LBUTTONDBLCLK,
PM_NOREMOVE | PM_NOYIELD))
{
return TRUE;
}
return FALSE;
}
/*
* CTxtWinHost::TxGetWindow
*
* @mfunc Fetches the window associated with this control (or
* set of controls potentially). Useful for answering
* IOleWindow::GetWindow.
*
* @rdesc HRESULT
*/
HRESULT CTxtWinHost::TxGetWindow(HWND *phwnd)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN, "CTxtWinHost::GetWindow");
*phwnd = _hwnd;
return NOERROR;
}
/*
* CTxtWinHost::SetForegroundWindow
*
* @mfunc Sets window to foreground window & gives the focus
*
* @rdesc NOERROR - succeeded
* E_FAIL - failed.
*/
HRESULT CTxtWinHost::TxSetForegroundWindow()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN,
"CTxtWinHost::SetForegroundWindow");
if(!SetForegroundWindow(_hwnd))
SetFocus(_hwnd);
return NOERROR;
}
/*
* CTxtWinHost::TxGetPalette
*
* @mfunc Returns application specific palette if there is one
*
* @rdesc ~NULL - there was one
* NULL - use default palette
*/
HPALETTE CTxtWinHost::TxGetPalette()
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN,
"CTxtWinHost::TxGetPalette");
return _hpal;
}
/*
* CTxtWinHost::TxGetFEFlags
*
* @mfunc return FE settings
*
* @rdesc NOERROR - succeeded
* E_FAIL - failed.
*/
HRESULT CTxtWinHost::TxGetFEFlags(LONG *pFEFlags)
{
TRACEBEGIN(TRCSUBSYSHOST, TRCSCOPEEXTERN,
"CTxtWinHost::TxGetFEFlags");
if (!pFEFlags)
return E_INVALIDARG;
*pFEFlags = 0;
if (_usIMEMode == ES_NOIME)
*pFEFlags |= ES_NOIME;
if (_usIMEMode == ES_SELFIME)
*pFEFlags |= ES_SELFIME;
return NOERROR;
}
// Helper function in edit.cpp
LONG GetECDefaultHeightAndWidth(
ITextServices *pts,
HDC hdc,
LONG lZoomNumerator,
LONG lZoomDenominator,
LONG yPixelsPerInch,
LONG *pxAveWidth,
LONG *pxOverhang,
LONG *pxUnderhang);
/*
* CTxtWinHost::OnSetMargins
*
* @mfunc Handle EM_SETMARGINS message
*
* @rdesc None.
*/
void CTxtWinHost::OnSetMargins(
DWORD fwMargin, //@parm Type of requested operation
DWORD xLeft, //@parm Where to put left margin
DWORD xRight) //@parm Where to put right margin
{
LONG xLeftMargin = -1;
LONG xRightMargin = -1;
HDC hdc;
if(EC_USEFONTINFO == fwMargin)
{
// Get the DC since it is needed for the call
hdc = GetDC(_hwnd);
// Multiline behaves differently than single line
if (_dwStyle & ES_MULTILINE)
{
// Multiline - over/underhange controls margin
GetECDefaultHeightAndWidth(_pserv, hdc, 1, 1,
W32->GetYPerInchScreenDC(), NULL,
&xLeftMargin, &xRightMargin);
}
else
{
// Single line edit controls set the margins to
// the average character width on both left and
// right.
GetECDefaultHeightAndWidth(_pserv, hdc, 1, 1,
W32->GetYPerInchScreenDC(), &xLeftMargin, NULL, NULL);
xRightMargin = xLeftMargin;
}
ReleaseDC(_hwnd, hdc);
}
else
{
// The request is for setting exact pixels.
if(EC_LEFTMARGIN & fwMargin)
xLeftMargin = xLeft;
if(EC_RIGHTMARGIN & fwMargin)
xRightMargin = xRight;
}
// Set left margin if so requested
if (xLeftMargin != -1)
_rcViewInset.left = W32->DeviceToHimetric(xLeftMargin, W32->GetXPerInchScreenDC());
// Set right margin if so requested
if (xRightMargin != -1)
_rcViewInset.right = W32->DeviceToHimetric(xRightMargin, W32->GetXPerInchScreenDC());
if (xLeftMargin != -1 || xRightMargin != -1)
_pserv->OnTxPropertyBitsChange(TXTBIT_VIEWINSETCHANGE, TXTBIT_VIEWINSETCHANGE);
}
/*
* CTxtWinHost::SetScrollInfo
*
* @mfunc Set scrolling information for the scroll bar.
*/
void CTxtWinHost::SetScrollInfo(
INT fnBar, //@parm Specifies scroll bar to be updated
BOOL fRedraw) //@parm whether redraw is necessary
{
// Set up the basic structure for the call
SCROLLINFO si;
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_ALL;
AssertSz(_pserv != NULL,
"CTxtWinHost::SetScrollInfo called with NULL _pserv");
// Call back to the control to get the parameters
if(fnBar == SB_HORZ)
{
_pserv->TxGetHScroll((LONG *) &si.nMin, (LONG *) &si.nMax,
(LONG *) &si.nPos, (LONG *) &si.nPage, NULL);
}
else
{
_pserv->TxGetVScroll((LONG *) &si.nMin,
(LONG *) &si.nMax, (LONG *) &si.nPos, (LONG *) &si.nPage, NULL);
}
// Do the call
::SetScrollInfo(_hwnd, fnBar, &si, fRedraw);
}
/*
* CTxtWinHost::SetScrollBarsForWmEnable
*
* @mfunc Enable/Disable scroll bars
*
* @rdesc None.
*/
void CTxtWinHost::SetScrollBarsForWmEnable(
BOOL fEnable) //@parm Whether scrollbars s/b enabled or disabled.
{
if(!_pserv) // If no edit object,
return; // no scrollbars
BOOL fHoriz = FALSE;
BOOL fVert = FALSE;
UINT wArrows = fEnable ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
_pserv->TxGetHScroll(NULL, NULL, NULL, NULL, &fHoriz);
_pserv->TxGetVScroll(NULL, NULL, NULL, NULL, &fVert);
if(fHoriz) // There is a horizontal scroll bar
W32->EnableScrollBar(_hwnd, SB_HORZ, wArrows);
if(fVert) // There is a vertical scroll bar
W32->EnableScrollBar(_hwnd, SB_VERT, wArrows);
}
/*
* CTxtWinHost::SetScrollBarsForWmEnable
*
* @mfunc Notification that Text Services is released.
*
* @rdesc None.
*/
void CTxtWinHost::TxFreeTextServicesNotification()
{
_fTextServiceFree = TRUE;
}
/*
* CTxtWinHost::TxGetEditStyle
*
* @mfunc Get Edit Style flags
*
* @rdesc NOERROR is data available.
*/
HRESULT CTxtWinHost::TxGetEditStyle(
DWORD dwItem,
DWORD *pdwData)
{
if (!pdwData)
return E_INVALIDARG;
*pdwData = 0;
if (dwItem & TXES_ISDIALOG && _fInDialogBox)
*pdwData |= TXES_ISDIALOG;
return NOERROR;
}
/*
* CTxtWinHost::TxGetWindowStyles
*
* @mfunc Return window style bits
*
* @rdesc NOERROR is data available.
*/
HRESULT CTxtWinHost::TxGetWindowStyles(DWORD *pdwStyle, DWORD *pdwExStyle)
{
if (!pdwStyle || !pdwExStyle)
return E_INVALIDARG;
*pdwStyle = _dwStyle;
*pdwExStyle = _dwExStyle;
return NOERROR;
}
#endif // NOWINDOWHOSTS
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