windows-nt/Source/XPSP1/NT/windows/richedit/re41/dispsl.cpp

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2020-09-26 03:20:57 -05:00
/*
* @doc INTERNAL
*
* @module DISPSL.CPP -- CDisplaySL class |
*
* This is the Single-line display engine. See disp.c for the base class
* methods and dispml.c for the Multi-line display engine.
*
* Owner:<nl>
* Original RichEdit code: David R. Fulmer
* Christian Fortini
* Murray Sargent
*
* Copyright (c) 1995-2000, Microsoft Corporation. All rights reserved.
*/
#include "_common.h"
#include "_dispsl.h"
#include "_measure.h"
#include "_select.h"
#include "_render.h"
#include "_font.h"
#include "_dfreeze.h"
ASSERTDATA
const LONG CALC_XSCROLL_FROM_FIRST_VISIBLE = -2;
/*
* CDisplaySL::CDisplaySL
*
* Purpose
* Constructor
*/
CDisplaySL::CDisplaySL ( CTxtEdit* ped )
: CDisplay( ped )
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::CDisplaySL");
Assert(!_fMultiLine);
}
/*
* CDisplaySL::Init()
*
* @mfunc
* Init this display for the screen
*
* @rdesc
* TRUE iff initialization succeeded
*/
BOOL CDisplaySL::Init()
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::Init");
// Initialize our base class
if(!CDisplay::Init())
return FALSE;
SetWordWrap(FALSE);
return TRUE;
}
/*
* CDisplaySL::InitVars()
*
*/
void CDisplaySL::InitVars()
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::InitVars");
_upScroll = 0;
SetCpFirstVisible(0);
}
/*
* CDisplaySL::RecalcView(fUpdateScrollBars, prc)
*
* @mfunc
* Recalc all lines breaks and update first visible line
*
* @rdesc
* TRUE if success
*/
BOOL CDisplaySL::RecalcView(
BOOL fUpdateScrollBars, //@param TRUE - update scroll bars
RECTUV* prc)
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::RecalcView");
LONG dupOld = _dup;
if(!RecalcLine())
return FALSE;
if(_fViewChanged)
{
if(IsActive() || _dup <= GetDupView())
{
_upScroll = 0;
SetCpFirstVisible(0);
}
else if(CALC_XSCROLL_FROM_FIRST_VISIBLE == _upScroll)
{
// In this case we want to set our upScroll by a visible. The
// only way to get here is if the active view has been cloned
// for displaying an inactive view.
_upScroll = 0; // Assume that first visible is 0
if(GetFirstVisibleCp()) // Check first visible
{
CMeasurer me(this); // Start at cp 0
me.NewLine(*this); // Measure from there to where we are
// Scroll is length to character
_upScroll = CLine::UpFromCch(me, GetFirstVisibleCp(), TA_TOP);
}
}
if(fUpdateScrollBars)
UpdateScrollBar(SB_HORZ, TRUE);
_fViewChanged = FALSE;
}
// We only resize if width of single line control has changed.
if(_dup != dupOld)
{
if (FAILED(RequestResize()))
_ped->GetCallMgr()->SetOutOfMemory();
else if (prc && _ped->_fInOurHost) /*bug fix# 5830, forms3 relies on old behavior*/
_ped->TxGetClientRect(prc);
}
return TRUE;
}
/*
* CDisplaySL::RecalcLine()
*
* @mfunc
* Recalculate a line
*
* @rdesc
* TRUE if success <nl>
* FALSE if failure <nl>
*/
BOOL CDisplaySL::RecalcLine()
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::RecalcLine");
Assert( _ped );
// Create a measurer starting at cp = 0
CMeasurer me(this);
LONG dupOld = _dup;
BOOL fMeasured = CLine::Measure(me, MEASURE_FIRSTINPARA);
if(!fMeasured)
{
Assert(FALSE); // Should succeed
InitVars();
return FALSE;
}
_fNeedRecalc = FALSE;
_fRecalcDone = TRUE;
if(dupOld != _dup)
_fViewChanged = TRUE;
_fLineRecalcErr = FALSE;
return fMeasured;
}
/*
* CDisplaySL::Render(rcView, rcRender)
*
* @mfunc
* Renders this line
*/
void CDisplaySL::Render(
const RECTUV &rcView, //@parm View RECT
const RECTUV &rcRender) //@parm RECT to render (must be contained in
// client rect)
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::Render");
POINTUV pt;
_fRectInvalid = FALSE;
CRenderer re(this);
if(!re.StartRender(rcView, rcRender))
return;
// Set renderer at top/left of view rect
pt.u = rcView.left - _upScroll;
pt.v = rcView.top;
re.SetCurPoint(pt);
// Renderer is set at cp = 0 at the moment
CLine::Render(re, TRUE);
re.EndRender(this, this, 0, pt);
if(_fOffscreenOnce)
_fUseOffscreenDC = _fOffscreenOnce = FALSE;
// If line metrics are not yet up to date, get them from renderer
if(_dup == -1)
{
_dup = re._li._dup;
_dvpHeight = re._li._dvpHeight;
_dvpDescent = re._li._dvpDescent;
}
}
/*
* CDisplaySL::WaitForRecalcIli(ili)
*
* @mfunc
* Wait until line array is recalculated up to line <p ili>
*
* @rdesc
* Returns TRUE if lines were recalc'd up to ili (TRUE if ili == 0)
*/
BOOL CDisplaySL::WaitForRecalcIli (
LONG ili) //@parm Line index to recalculate line array up to
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::WaitForRecalcIli");
return ili == 0;
}
/*
* CDisplaySL::GetScrollRange(nBar)
*
* @mfunc
* Returns the max part of a scrollbar range for scrollbar <p nBar>
*
* @rdesc
* LONG max part of scrollbar range
*/
LONG CDisplaySL::GetScrollRange(
INT nBar) const //@parm Scroll bar to interrogate (SB_VERT or SB_HORZ)
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetScrollRange");
Assert( IsMain() );
LONG lRange = 0;
if(nBar != SB_VERT && _fUScrollEnabled)
{
if(_ped->TxGetScrollBars() & WS_HSCROLL)
{
lRange = max(0, _dup + _ped->GetCaretWidth());
lRange = min(lRange, _UI16_MAX);
}
}
return lRange;
}
/*
* CDisplaySL::UpdateScrollBar(nBar, fUpdateRange)
*
* @mfunc
* Update horizontal scroll bar
* Also figure whether the scroll bar should be visible or not
*
* @rdesc
* BOOL
*/
BOOL CDisplaySL::UpdateScrollBar (
INT nBar, //@parm Which scrollbar: SB_HORZ or SB_VERT
BOOL fUpdateRange) //@parm Should range be recomputed and updated
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::UpdateScrollBar");
// Note: In the old days we didn't allow autosize & scroll bars, so to keep
// forms working, we need this special logic with respect to autosize.
if (!IsActive() || SB_VERT == nBar ||
!_ped->fInOurHost() && _ped->TxGetAutoSize())
{
// Scroll bars are only updated on active views.
return FALSE;
}
const DWORD dwScrollBars = _ped->TxGetScrollBars();
const BOOL fHide = !(dwScrollBars & ES_DISABLENOSCROLL);
BOOL fReturn = FALSE;
BOOL fEnabled = TRUE;
BOOL fEnabledOld = FALSE;
LONG lScroll = 0;
CTxtSelection *psel = _ped->GetSelNC();
// Get scrolling position
if(nBar == SB_HORZ)
{
if(!(dwScrollBars & WS_HSCROLL))
{
// even if we don't have scrollbars, we may allow horizontal
// scrolling.
if(!_fUScrollEnabled)
_fUScrollEnabled = !!(dwScrollBars & ES_AUTOHSCROLL);
return FALSE;
}
fEnabledOld = _fUScrollEnabled;
lScroll = ConvertUPosToScrollPos(_upScroll);
if(_dup <= _dupView)
fEnabled = FALSE;
}
// !s beforehand because all true values aren't necessarily equal
if(!fEnabled != !fEnabledOld)
{
if(_fDeferUpdateScrollBar)
_fUpdateScrollBarDeferred = TRUE;
else
{
if (nBar == SB_HORZ)
_fUScrollEnabled = fEnabled;
else
_fVScrollEnabled = fEnabled;
}
if(!_fDeferUpdateScrollBar)
{
if(!fHide) // Don't hide scrollbar, just disable
_ped->TxEnableScrollBar(nBar, fEnabled ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH);
else
{
fReturn = TRUE;
// Make sure to hide caret before showing scrollbar
if(psel)
psel->ShowCaret(FALSE);
// Hide or show scroll bar
_ped->TxShowScrollBar(nBar, fEnabled);
if(psel)
psel->ShowCaret(TRUE);
}
}
}
// Set scrollbar range and thumb position
if(fEnabled)
{
if(fUpdateRange)
{
if(!_fDeferUpdateScrollBar)
_ped->TxSetScrollRange(nBar, 0, GetScrollRange(nBar), FALSE);
}
if(_fDeferUpdateScrollBar)
_fUpdateScrollBarDeferred = TRUE;
else
_ped->TxSetScrollPos(nBar, lScroll, TRUE);
}
else if (!_fDeferUpdateScrollBar)
{
// This turns off the scroll bar and only needs to happen when a change
// occurs so we can count on the change in state check above to set
// _fUpdateScrollBarDeferred.
if (!fEnabled && fEnabledOld)
_ped->TxSetScrollRange(nBar, 0, 0, FALSE);
}
return fReturn;
}
BOOL CDisplaySL::IsMain() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::IsMain");
return TRUE;
}
LONG CDisplaySL::GetDupLineMax() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetWidth");
return CLine::_dup;
}
LONG CDisplaySL::GetHeight() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetHeight");
return CLine::_dvpHeight;
}
LONG CDisplaySL::GetResizeHeight() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetResizeHeight");
return CLine::_dvpHeight;
}
LONG CDisplaySL::LineCount() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::LineCount");
return 1;
}
/*
* CDisplaySL::GetCliVisible()
*
* @mfunc
* Get count of visible lines and update GetCp()MostVisible for PageDown()
*
* @rdesc
* count of visible lines
*/
LONG CDisplaySL::GetCliVisible (
LONG* pcpMostVisible, //@parm Returns cpMostVisible
BOOL fLastCharOfLastVisible) const //@parm Want cp of last visible char
// (ignored here).
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetCliVisible");
if (pcpMostVisible)
*pcpMostVisible = CLine::_cch;
return 1;
}
LONG CDisplaySL::GetFirstVisibleLine() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetFirstVisibleLine");
return 0;
}
/*
* CDisplaySL::GetLineText(ili, pchBuff, cchMost)
*
* @mfunc
* Copy given line of this display into a character buffer
*
* @rdesc
* number of character copied
*/
LONG CDisplaySL::GetLineText (
LONG ili, //@parm Line to get text of
TCHAR * pchBuff, //@parm Buffer to stuff text into
LONG cchMost) //@parm Length of buffer
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetLineText");
if(ili == 0)
{
cchMost = min(cchMost, _ped->GetTextLength());
if(cchMost > 0)
{
CTxtPtr tp(_ped, 0);
return tp.GetText( cchMost, pchBuff );
}
}
return 0;
}
/*
* CDisplaySL::CpFromLine(ili, pdvp)
*
* @mfunc
* Computes cp at start of given line
* (and top of line position relative to this display)
*
* @rdesc
* cp of given line; here always 0
*/
LONG CDisplaySL::CpFromLine (
LONG ili, //@parm Line we're interested in (if <lt> 0 means caret line)
LONG *pdvp) //@parm Returns top of line relative to display
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::CpFromLine");
// (NULL if don't want that info)
Assert( ili == 0 );
if(pdvp)
*pdvp = 0;
return 0;
}
/*
* CDisplaySL::LineFromCp(cp, fAtEnd)
*
* @mfunc
* Computes line containing given cp.
*
* @rdesc
* index of line found; here returns 0 always
*/
LONG CDisplaySL::LineFromCp(
LONG cp, //@parm cp to look for
BOOL fAtEnd) //@parm If true, return previous line for ambiguous cp
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::LineFromCp");
return 0;
}
/*
* CDisplaySL::CpFromPoint(pt, prcClient, ptp, prp, fAllowEOL, pHit, pdispdim)
*
* @mfunc
* Determine cp at given point
*
* @devnote
* --- Use when in-place active only ---
*
* @rdesc
* Computed cp, -1 if failed
*/
LONG CDisplaySL::CpFromPoint(
POINTUV pt, //@parm Point to compute cp at (client coords)
const RECTUV *prcClient,//@parm Client rectangle (can be NULL if active).
CRchTxtPtr * const ptp, //@parm Returns text pointer at cp (may be NULL)
CLinePtr * const prp, //@parm Returns line pointer at cp (may be NULL)
BOOL fAllowEOL, //@parm Click at EOL returns cp after CRLF
HITTEST * phit, //@parm Out parm for hit-test value
CDispDim * pdispdim, //@parm Out parm for display dimensions
LONG *pcpActual, //@parm Out cp that pt is above
CLine * pliParent) //@parm Parent pli for table row displays
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::CpFromPoint");
RECTUV rcView;
LONG cp = 0;
LONG cch = 0;
HITTEST hit = HT_Nothing;
GetViewRect(rcView, prcClient);
if (pt.v >= rcView.top && pt.v <= rcView.bottom)
{
// Create measurer at cp(0)
CMeasurer me(this);
// Get character in the line
pt.u += _upScroll - rcView.left; // Transform to galley coordinates
pt.v -= rcView.top;
cch = CLine::CchFromUp(me, pt, pdispdim, &hit, pcpActual);
// Don't allow click at EOL to select EOL marker and take into account
// single line edits as well
if(!fAllowEOL && cch == CLine::_cch && CLine::_cchEOP)
me._rpTX.BackupCRLF();
cp = me.GetCp();
}
if (phit)
*phit = hit;
if(ptp)
ptp->SetCp(cp);
if(prp)
prp->Set(0, cch);
return cp;
}
/*
* CDisplaySL::PointFromTp(tp, fAtEnd, pt, prp, taMode, pdx)
*
* @mfunc
* Determine coordinates at given tp
*
* @devnote
* --- Use when in-place active only ---
*
* @rdesc
* line index at cp, -1 if error
*/
LONG CDisplaySL::PointFromTp(
const CRchTxtPtr &rtp, //@parm Text ptr to get coordinates at
const RECTUV *prcClient,//@parm Client rectangle (can be NULL if active).
BOOL fAtEnd, //@parm Return end of previous line for ambiguous cp
POINTUV & pt, //@parm Returns point at cp in client coords
CLinePtr * const prp, //@parm Returns line pointer at tp (may be null)
UINT taMode, //@parm Text Align mode: top, baseline, bottom
CDispDim * pdispdim) //@parm Out parm for display dimensions
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::PointFromTp");
LONG dy = 0;
RECTUV rcView;
CLinePtr rp(this);
if(!rp.SetCp(rtp.GetCp(), fAtEnd))
return -1;
AssertSz(_ped->_fInPlaceActive || prcClient,
"CDisplaySL::PointFromTp() called with invalid client rect");
GetViewRect(rcView, prcClient);
pt.u = rcView.left - _upScroll;
pt.v = rcView.top;
CMeasurer me(this, rtp);
me.Move(-rp.GetIch()); // Backup to start of line
me.NewLine(*rp); // Measure from there to where we are
pt.u += CLine::UpFromCch(me, rp.GetIch(), taMode, pdispdim, &dy);
pt.v += dy;
if(prp)
*prp = rp;
return rp;
}
/*
* CDisplaySL::UpdateView(&tpFirst, cchOld, cchNew)
*
* @mfunc
* Update visible part of display (the "view" on the screen).
*
* @devnote
* --- Use when in-place active only ---
*
* @rdesc
* TRUE if success
*/
BOOL CDisplaySL::UpdateView(
CRchTxtPtr &tpFirst, //@parm Text ptr where change happened
LONG cchOld, //@parm Count of chars deleted
LONG cchNew) //@parm Count of chars inserted
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::UpdateView");
BOOL fUpdateScrollBarHorz = FALSE;
BOOL fReturn = TRUE;
RECTUV rcView;
CTxtSelection *psel = _ped->GetSelNC();
LONG dupOld = _dup;
BOOL fScrollChanged = FALSE;
RECTUV rcClient;
RECTUV rc;
LONG dvpOld = _dvpHeight;
if (_fNoUpdateView)
return fReturn;
AssertSz(_ped->_fInPlaceActive, "CDisplaySL::UpdateView(...) called when inactive");
_ped->TxGetClientRect(&rcClient);
GetViewRect(rcView, &rcClient);
if(psel && !psel->PuttingChar())
psel->ClearCchPending();
if(!RecalcLine())
{
// We're in deep crap now, the recalc failed. Let's try to get
// out of this with our head still mostly attached
fReturn = FALSE;
}
// An update has occurred. Go offscreen to be flicker-free.
if(!_fUseOffscreenDC)
_fUseOffscreenDC = _fOffscreenOnce = TRUE;
//If we tried to go offscreen, but the edit changed the first
//character, it might be the WM_SETTEXT case called when dialogs
//are instantiated, and so it doesn't make sense to go offscreen there.
if (_fOffscreenOnce && tpFirst.GetCp() == 0)
_fOffscreenOnce = _fUseOffscreenDC = FALSE;
if(_dup <= _dupView)
{
// x scroll range is smaller than the view width
// force x scrolling position = 0
_upScroll = 0;
SetCpFirstVisible(0);
_fViewChanged = TRUE;
fUpdateScrollBarHorz = TRUE;
}
_fRectInvalid = TRUE;
// Only resize a Single Line edit control if the width changes
if(_dup != dupOld)
{
if(FAILED(RequestResize()))
_ped->GetCallMgr()->SetOutOfMemory();
}
// If view changed, update scroll bars
if(_fViewChanged)
{
_fViewChanged = FALSE;
fScrollChanged = UpdateScrollBar(SB_HORZ);
}
// Scroll bar state did not change so we need to update screen
// Build an invalidation rectangle.
rc = rcClient;
if(dvpOld == _dvpHeight)
{
// Height of control did not change so we can minimize the update
// rectangle to the height of the control.
rc.bottom = rcView.top + _dvpHeight;
}
// Tell display to update when it gets a chance
_ped->TxInvalidateRect(&rc);
return fReturn;
}
/*
* CDisplaySL::ScrollView(upScroll, vpScroll, fTracking, fFractionalScroll)
*
* @mfunc
* Scroll view to new x and y position
*
* @devnote
* This method tries to adjust the y scroll pos before
* scrolling to display complete line at top. x scroll
* pos is adjusted to avoid scrolling all text off the
* view rectangle.
*
* Must be able to handle vpScroll <gt> pdp->yHeight and vpScroll <lt> 0
*
* @rdesc
* TRUE if actual scrolling occurred,
* FALSE if no change
*/
BOOL CDisplaySL::ScrollView (
LONG upScroll, //@parm New x scroll position
LONG vpScroll, //@parm New y scroll position
BOOL fTracking, //@parm TRUE indicates we are tracking scrollbar thumb
BOOL fFractionalScroll)
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::ScrollView");
LONG dupMax;
LONG dx = 0;
RECTUV rcClient, rcClip;
CTxtSelection *psel = _ped->GetSelNC();
COleObject *pipo;
AssertSz(_ped->_fInPlaceActive, "CDisplaySL::ScrollView() called when not in-place");
if(upScroll == -1)
return FALSE;
//For scrolling purposes, we clip to rcView's top and bottom, but rcClient's left and right
_ped->TxGetClientRect(&rcClient);
GetViewRect(rcClip, &rcClient);
rcClip.left = rcClient.left;
rcClip.right = rcClient.right;
// Determine horizontal scrolling pos.
dupMax = _dup;
upScroll = min(upScroll, dupMax);
upScroll = max(0, upScroll);
dx = _upScroll - upScroll;
if(dx)
{
_upScroll = upScroll;
// Calculate new first visible
CMeasurer me(this); // Create measurer at cp(0)
POINTUV pt = {upScroll, 0};
CDispDim dispdim;
HITTEST Hit;
LONG cpActual;
CLine::CchFromUp(me, pt, &dispdim, &Hit, &cpActual);
SetCpFirstVisible(cpActual); // Save character position
}
AssertSz(IsMain(), "CDisplaySL::ScrollView non-main SL control");
// Now perform the actual scrolling
if(dx)
{
if(!_fRectInvalid)
{
// Scroll only if scrolling < view dimensions and we are in-place
// Note that we only scroll the active view and we can be in-place
// active and have multiple inactive views.
if(IsActive() && !IsTransparent() && dx < _dupView)
{
if(psel)
psel->ShowCaret(FALSE);
RECT rcxyClip;
RectFromRectuv(rcxyClip, rcClip);
_ped->TxScrollWindowEx(dx, 0, NULL, &rcxyClip);
if(psel)
psel->ShowCaret(TRUE);
}
else
_ped->TxInvalidateRect(&rcClip);
}
if(psel)
psel->UpdateCaret(FALSE);
if(!fTracking && dx)
{
_ped->SendScrollEvent(EN_HSCROLL);
UpdateScrollBar(SB_HORZ);
}
_ped->TxUpdateWindow();
// FUTURE: since we're now repositioning in place active
// objects every time we draw, this call seems to be
// superfluous (AndreiB)
// Tell object subsystem to reposition any in place objects
if(_ped->GetObjectCount())
{
pipo = _ped->GetObjectMgr()->GetInPlaceActiveObject();
if(pipo)
pipo->OnReposition();
}
}
return dx;
}
/*
* CDisplaySL::InvertRange(cp, cch, selAction)
*
* @mfunc
* Invert a given range on screen (for selection)
*
* @devnote
* --- Use when in-place active only ---
*
* @rdesc
* TRUE if success
*/
BOOL CDisplaySL::InvertRange (
LONG cp, //@parm Active end of range to invert
LONG cch, //@parm Signed length of range
SELDISPLAYACTION selAction) //@parm What we are doing to the selection
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::InvertRange");
if(cch < 0) //make cch negative, make cp the minimum
cch = -cch;
else
cp -= cch;
#ifndef NOLINESERVICES
if (g_pols)
g_pols->DestroyLine(this);
#endif
// If display is frozen, just update recalc region and move on.
if(_padc)
{
AssertSz(cp >= 0, "CDisplayML::InvertRange: range (cp) goes below"
"zero!!" );
// Make sure these values are bounded.
if(cp > _ped->GetTextLength()) // Don't bother updating region;
return TRUE; // it's out of bounds
if(cp + cch > _ped->GetTextLength())
cch -= cp + cch - _ped->GetTextLength();
_padc->UpdateRecalcRegion(cp, cch, cch);
return TRUE;
}
// Ensure all visible lines are recalced
if(!WaitForRecalcView())
return FALSE;
//REVIEW (keithcu) CDisplayML::InvertRange() has a different order WRT
//frozen displays and OLE objects.
// If an object is being inverted, and that is all that
// is being inverted, delegate to the ObjectMgr.
if (cch == 1 && _ped->GetObjectCount() &&
(selAction == selSetNormal || selAction == selSetHiLite) )
{
CObjectMgr* pobjmgr = _ped->GetObjectMgr();
CTxtPtr tp(_ped, cp);
if(tp.GetChar() == WCH_EMBEDDING && pobjmgr)
pobjmgr->HandleSingleSelect(_ped, cp, selAction == selSetHiLite);
}
// Get view rectangle
AssertSz(_ped->_fInPlaceActive, "CDisplaySL::InvertRange() called when not in-place active");
_ped->TxInvalidate();
return TRUE;
}
/*
* CDisplaySL::InitLinePtr (&lp)
*
* @mfunc
* Initialize a CLinePtr properly
*/
void CDisplaySL::InitLinePtr (
CLinePtr & lp ) //@parm Ptr to line to initialize
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::InitLinePtr");
lp.Init(*this);
}
/*
* CDisplaySL::GetNaturalSize(hdcDraw, hicTarget, dwMode, pwidth, pheight)
*
* @mfunc
* Recalculate display to input width & height
*
* @rdesc
* S_OK - Call completed successfully <nl>
*/
HRESULT CDisplaySL::GetNaturalSize(
HDC hdcDraw, //@parm DC for drawing
HDC hicTarget, //@parm DC for information
DWORD dwMode, //@parm Type of natural size required
LONG *pwidth, //@parm Input/output width parm
LONG *pheight) //@parm Input/output height parm
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetNaturalSize");
// Assume this won't work
HRESULT hr = E_FAIL;
// Set height temporarily so zoom factor will work out
LONG yOrigHeightClient = SetClientHeight(*pheight);
// Adjust height and width by view inset
LONG widthView = *pwidth;
LONG heightView = *pheight;
GetViewDim(widthView, heightView);
// Store adjustment so we can restore it to height & width
LONG widthAdj = *pwidth - widthView;
LONG heightAdj = *pheight - heightView;
LONG uCaret = !_ped->fInOurHost() && !_ped->fInHost2() ? duCaret : 0;
// Recalculate size needed
// Create a measurer starting at cp = 0
CMeasurer me(this);
CLine liNew;
if(liNew.Measure(me, MEASURE_FIRSTINPARA))
{
*pwidth = liNew._dup;
if(dwMode == TXTNS_FITTOCONTENT2)
*pwidth += liNew._upStart + me.GetRightIndent();
*pheight = liNew._dvpHeight;
hr = S_OK;
}
// Restore insets so output reflects true client rect needed
*pwidth += widthAdj + uCaret;
*pheight += heightAdj;
// Restore client height to match current cache
SetClientHeight(yOrigHeightClient);
return hr;
}
/*
* CDisplaySL::GetWordWrap()
*
* @mfunc
* Gets the wrap flag
*
* @rdesc
* TRUE - Word wrap
* FALSE - No word Word wrap
*
* @devnote
* Single line controls cannot word wrap.
*/
BOOL CDisplaySL::GetWordWrap() const
{
TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDisplaySL::GetNoWrap");
return FALSE;
}
/*
* CDisplaySL::Clone()
*
* @mfunc
* Make a copy of this object
*
* @rdesc
* NULL - failed
* CDisplay *
*/
CDisplay *CDisplaySL::Clone() const
{
CDisplaySL *pdp = new CDisplaySL(_ped);
if(pdp)
{
// Initialize our base class
if(pdp->CDisplay::Init())
{
pdp->InitFromDisplay(this);
// Setting scroll to 0 means use the first visible character
pdp->_upScroll = CALC_XSCROLL_FROM_FIRST_VISIBLE;
pdp->_fVScrollEnabled = _fVScrollEnabled;
pdp->_fWordWrap = _fWordWrap;
pdp->ResetDrawInfo(this);
pdp->SetCpFirstVisible(GetFirstVisibleCp());
// This can't be active view since it is a clone of some view
pdp->SetActiveFlag(FALSE);
}
}
return pdp;
}
/*
* CDisplaySL::GetMaxUScroll()
*
* @mfunc
* Get the maximum u scroll value
*
* @rdesc
* Maximum u scroll value
*
*/
LONG CDisplaySL::GetMaxUScroll() const
{
LONG uCaret = !_ped->fInOurHost() && !_ped->fInHost2() ? duCaret : 0;
return _dup + uCaret;
}