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/*
* @doc INTERNAL
*
* @module FRUNPTR.C -- FormatRunPtr methods |
*
* common code to handle character and paragraph format runs
*
* Original Authors: <nl>
* Original RichEdit 1.0 code: David R. Fulmer <nl>
* Christian Fortini <nl>
* Murray Sargent <nl>
*
* History:
* 6/25/95 alexgo convert to use Auto-Doc and simplified backing
* store model
*
* @devnote
* BOR and EOR mean Beginning Of Run and End Of Run, respectively
*
* Copyright (c) 1995-1998, Microsoft Corporation. All rights reserved.
*/
#include "_common.h"
#include "_edit.h"
#include "_frunptr.h"
#include "_rtext.h"
#include "_font.h"
ASSERTDATA
//
// Invariant stuff
//
#define DEBUG_CLASSNAME CFormatRunPtr
#include "_invar.h"
#ifdef DEBUG
/*
* CFormatRunPtr::Invariant
*
* @mfunc Invariant for format run pointers
*
* @rdesc BOOL
*/
BOOL CFormatRunPtr::Invariant() const
{
if(IsValid())
{
CFormatRun *prun = GetRun(0);
if(prun && _iRun)
{
Assert(prun->_cch > 0);
}
}
else
{
Assert(_ich == 0);
}
return CRunPtrBase::Invariant();
}
#endif
/*
* CFormatRunPtr::InitRuns(ich, cch, iFormat, ppfrs)
*
* @mfunc
* Setup this format run ptr for rich-text operation, namely,
* allocate CArray<lt>CFormatRun<gt> if not allocated, assign it to this
* run ptr's _pRuns, add initial run if no runs are present, and store
* initial cch and ich
*
* @rdesc
* TRUE if succeeds
*/
BOOL CFormatRunPtr::InitRuns(
LONG ich, //@parm # chars in initial run
LONG cch, //@parm char offset in initial run
CFormatRuns **ppfrs) //@parm ptr to CFormatRuns ptr
{
TRACEBEGIN(TRCSUBSYSBACK, TRCSCOPEINTERN, "CFormatRunPtr::InitRuns");
_TEST_INVARIANT_
AssertSz( ppfrs,
"FRP::InitRuns: illegal ptr to runs");
AssertSz( !IsValid(),
"FRP::InitRuns: ptr already valid");
if(!*ppfrs) // Allocate format runs
{
_pRuns = (CRunArray *) new CFormatRuns();
if(!_pRuns)
goto NoRAM;
*ppfrs = (CFormatRuns *)_pRuns;
}
else // Format runs already alloc'd
_pRuns = (CRunArray *)*ppfrs; // Cache ptr to runs
if(!Count()) // No runs yet, so add one
{
CFormatRun *pRun= Add(1, NULL);
if(!pRun)
goto NoRAM;
#ifdef DEBUG
PvSet(*(void**)_pRuns);
#endif
_ich = ich;
ZeroMemory(pRun, sizeof(*pRun));
pRun->_cch = cch; // Define its _cch
pRun->_iFormat = -1; // and _iFormat
}
else
BindToCp(ich); // Format runs are in place
return TRUE;
NoRAM:
TRACEERRSZSC("CFormatRunPtr::InitRuns: Out Of RAM", E_OUTOFMEMORY);
return FALSE;
}
/*
* CFormatRunPtr::Delete(cch, pf, cchMove)
*
* @mfunc
* Delete/modify runs starting at this run ptr up to cch chars. <nl>
* There are 7 possibilities: <nl>
* 1. cch comes out of this run with count left over, i.e.,
* cch <lt>= (*this)->_cch - _ich && (*this)->_cch > cch
* (simple: no runs deleted/merged, just subtract cch) <nl>
* 2. cch comes out of this run and empties run and doc
* (simple: no runs left to delete/merge) <nl>
* 3. cch comes out of this run and empties run, which is last
* (need to delete run, no merge possibility) <nl>
* 4. cch comes out of this run and empties run, which is first
* (need to delete run, no merge possibility) <nl>
* 5. cch exceeds count available in this run and this run is last
* (simple: treat as 3.) <nl>
* 6. cch comes out of this run and empties run with runs before
* and after (need to delete run; merge possibility) <nl>
* 7. cch comes partly out of this run and partly out of later run(s)
* (may need to delete and merge) <nl>
*
* @comm
* PARAFORMATs have two special cases that use the cchMove argument set
* up in CRchTxtPtr::ReplaceRange().
*/
void CFormatRunPtr::Delete(
LONG cch, //@parm # chars to modify format runs for
IFormatCache *pf, //@parm IFormatCache ptr for ReleaseFormat
LONG cchMove) //@parm cch to move between runs (always 0 for CF)
{
TRACEBEGIN(TRCSUBSYSBACK, TRCSCOPEINTERN, "CFormatRunPtr::Delete");
_TEST_INVARIANT_
// We should not have any boundary cases for empty or NULL pointers.
// (i.e. if there's no text, then nobody should be calling delete).
Assert(IsValid());
LONG cchEnd = 0; // Probably unnecessary: see below
LONG cRun = 1;
BOOL fLast = (_iRun == Count() - 1);
LONG ifmtEnd, ifmtStart;
CFormatRun * pRun = Elem(_iRun);
CFormatRun * pRunRp;
LONG cchChunk = pRun->_cch - _ich;
CFormatRunPtr rp(*this); // Clone this run ptr
CBiDiLevel levelStart = {0,0};
CBiDiLevel levelEnd = {0,0};
rp.AdjustBackward(); // If at BOR, move to prev EOR
ifmtStart = rp.GetRun(0)->_iFormat; // to get start format
levelStart = rp.GetRun(0)->_level; // and level
rp = *this; // In case RpAdjustCp() backed up
// Process deletes confined to this run first, since their logic tends to
// clutter up other cases
AssertSz(cch >= 0, "FRP::Delete: cch < 0");
if(fLast) // Handle oversized cch on last
cch = min(cch, cchChunk); // run here
if(cch <= cchChunk) // cch comes out of this run
{
pRun->_cch -= cch;
Assert(pRun->_cch >= 0);
if(cchMove) // If nonzero here, we are
{ // deleting EOP at end of run
rp.AdjustForward(); // Adjust rp to beginning of
goto move; // next run and go move cchMove
} // chars back into this run
if(pRun->_cch) // Something left in run: done
return;
// Note: _ich = 0
if(!_iRun || fLast) // This run is either first
{ // or last
AdjustBackward(); // If last, go to prev EOR
if(_ich) // This run is empty so delete
cRun++; // Compensate for cRun-- coming up
ifmtStart = -2; // No runs eligible for merging
} // so use unmatchable ifmtStart
rp.NextRun(); // Set up to get next _iFormat
}
else
{
rp.AdvanceCp(cch); // Move clone to end of delete
pRunRp = rp.GetRun(0);
cRun = rp._iRun - _iRun // If at EOR, then need to add
+ (rp._ich == pRunRp->_cch); // one more run to delete
pRun->_cch = _ich; // Shorten this run to _ich chars
pRunRp->_cch -= rp._ich; // Shorten last run by rp._ich
rp._ich = 0;
Assert(pRunRp->_cch >= 0);
AssertSz(cRun > 0, "FRP: bogus runptr");
if(!_iRun) // First run?
ifmtStart = -2; // Then we cannot merge runs so
} // set to unmergable format
ifmtEnd = -3; // Default invalid format at end
if(rp.IsValid())
{
// FUTURE (murrays): probably rp is always valid here now and
// pRun->_cch is nonzero
pRun = rp.GetRun(0);
if (pRun->_cch) // run not empty
{
ifmtEnd = pRun->_iFormat; // Remember end format and count
levelEnd = pRun->_level;
cchEnd = pRun->_cch; // in case of merge
}
else if(rp._iRun != rp.Count() - 1) // run not last
{
pRun = rp.GetRun(1);
ifmtEnd = pRun->_iFormat; // Remember end format and count
levelEnd = pRun->_level;
cchEnd = pRun->_cch; // in case of merge
}
}
rp = *this; // Default to delete this run
if(_ich) // There are chars in this run
{
if(cchMove + _ich == 0) // Need to combine all chars of
{ // this run with run after del,
pf->AddRef(ifmtEnd); // so setup merge below using
ifmtStart = ifmtEnd; // ifmtEnd. This run then takes
pf->Release(GetRun(0)->_iFormat);
GetRun(0)->_iFormat = ifmtEnd; // place of run after del.
GetRun(0)->_level = levelEnd;
cchMove = 0; // cchMove all accounted for
}
rp.NextRun(); // Don't delete this run; start
cRun--; // with next one
}
AdjustBackward(); // If !_ich, go to prev EOR
if(ifmtEnd >=0 && // Same formats: merge runs
ifmtEnd == ifmtStart &&
levelStart == levelEnd)
{
GetRun(0)->_cch += cchEnd; // Add last-run cch to this one's
Assert(GetRun(0)->_cch >= 0);
cRun++; // Setup to eat last run
}
if(cRun > 0) // There are run(s) to delete
{
rp.Remove(cRun, pf);
if(!Count()) // If no more runs, keep this rp
_ich = _iRun = 0; // valid by pointing at cp = 0
}
move:
if(cchMove) // Need to move some cch between
{ // this run and next (See
GetRun(0)->_cch += cchMove; // CRchTxtPtr::ReplaceRange())
rp.GetRun(0)->_cch -= cchMove;
Assert(GetRun(0)->_cch >= 0);
Assert(rp.GetRun(0)->_cch >= 0);
Assert(_iRun < rp._iRun);
if(!rp.GetRun(0)->_cch) // If all chars moved out of rp's
rp.Remove(1, pf); // run, delete it
if(cchMove < 0) // Moved -cchMove chars from this
{ // run to next
if(!GetRun(0)->_cch)
Remove(1, pf);
else
_iRun++; // Keep this run ptr in sync with
_ich = -cchMove; // cp (can't use NextRun() due
} // to Invariants)
}
AdjustForward(); // Don't leave ptr at EOR unless
} // there are no more runs
/*
* CFormatRunPtr::InsertFormat(cch, ifmt, pf)
*
* @mfunc
* Insert cch chars with format ifmt into format runs starting at
* this run ptr
*
* @rdesc
* count of characters added
*
* @devnote
* It is the caller's responsibility to ensure that we are in the
* "normal" or "empty" state. A format run pointer doesn't know about
* CTxtStory, so it can't create the run array without outside help.
*/
LONG CFormatRunPtr::InsertFormat(
LONG cch, //@parm # chars to insert
LONG ifmt, //@parm format to use
IFormatCache *pf) //@parm pointer to IFormatCache to AddRefFormat
{
TRACEBEGIN(TRCSUBSYSBACK, TRCSCOPEINTERN, "CFormatRunPtr::InsertFormat");
LONG cRun;
CFormatRun *pRun;
CFormatRun *pRunPrev;
LONG cchRun; // Current-run length,
LONG ich; // offset, and
LONG iFormat; // format
_TEST_INVARIANT_
Assert(_pRuns);
if(!IsValid())
{
// Empty run case (occurs when inserting after all text is deleted)
pRun = Add(1, NULL);
goto StoreNewRunData; // (located at end of function)
}
// Go to previous run if at a boundary case
AdjustBackward();
pRun = Elem(_iRun); // Try other cases
cchRun = pRun->_cch;
iFormat = pRun->_iFormat;
ich = _ich;
// Same run case. Note that there is an additional boundary case; if we
// are the _end_ of one run, then the next run may have the necessary
// format.
if(ifmt == iFormat) // IP already has correct fmt
{
pRun->_cch += cch;
_ich += cch; // Inc offset to keep in sync
return cch;
}
if(_ich == pRun->_cch && _iRun < _pRuns->Count() - 1)
{
AdjustForward();
pRun = Elem(_iRun);
Assert(pRun);
if(pRun->_iFormat == ifmt)
{
pRun->_cch += cch;
_ich += cch;
return cch;
}
AdjustBackward();
}
// Prior run case (needed when formatting change occurs on line break
// and caret is at beginning of new line)
if(!ich && _iRun > 0 ) // IP at start of run
{
pRunPrev = GetPtr(pRun, -1);
if( ifmt == pRunPrev->_iFormat) // Prev run has same format:
{ // add count to prev run and
pRunPrev->_cch += cch;
return cch;
}
}
// Create new run[s] cases. There is a special case for a format
// run of zero length: just re-use it.
if(!pRun->_cch)
{
// This assert has been toned down to ignore a plain text control
// being forced into IME Rich Composition.
AssertSz( /* FALSE */ pRun->_iFormat == -1 && Count() == 1,
"CFormatRunPtr::InsertFormat: 0-length run");
pf->Release(pRun->_iFormat);
}
else // Need to create 1 or 2 new
{ // runs for insertion
cRun = 1; // Default 1 new run
if(ich && ich < cchRun) // Not at beginning or end of
cRun++; // run, so need two new runs
// The following insert call adds one or two runs at the current
// position. If the new run is inserted at the beginning or end
// of the current run, the latter needs no change; however, if
// the new run splits the current run in two, both pieces have
// to be updated (cRun == 2 case).
pRun = Insert(cRun); // Insert cRun run(s)
if(!pRun) // Out of RAM. Can't insert
{ // new format, but can keep
_ich += cch; // run ptr and format runs
GetRun(0)->_cch += cch; // valid. Note: doesn't
return cch; // signal any error; no access
} // to _ped->_fErrSpace
if(ich) // Not at beginning of run,
{
pRunPrev = pRun; // Previous run is current run
IncPtr(pRun); // New run is next run
VALIDATE_PTR(pRun);
pRun->_cch = cch; // Keep NextRun() invariant happy
NextRun(); // Point this runptr at it too
if(cRun == 2) // Are splitting current run
{ // _iFormat's are already set
AssertSz(pRunPrev->_iFormat == iFormat,
"CFormatRunPtr::InsertFormat: bad format inserted");
pRunPrev->_cch = ich; // Divide up original cch
GetPtr(pRun, 1)->_cch // accordingly
= cchRun - ich;
pf->AddRef(iFormat); // Addref iFormat for extra run
}
}
}
StoreNewRunData:
pf->AddRef(ifmt); // Addref ifmt
ZeroMemory(pRun, sizeof(*pRun));
pRun->_iFormat = ifmt; // Store insert format and count
pRun->_cch = cch; // of new run
_ich = cch; // cp goes at end of insertion
return cch;
}
/*
* CFormatRunPtr::MergeRuns(iRun, pf)
*
* @mfunc
* Merge adjacent runs that have the same format between this run
* <md CFormatRunPtr::_iRun> and that for <p iRun>
*
* @comm
* Changes this run ptr
*/
void CFormatRunPtr::MergeRuns(
LONG iRun, //@parm last run to check (can preceed or follow
// <md CFormatRunPtr::_iRun>)
IFormatCache *pf) //@parm pointer to IFormatCache to ReleaseFormat
{
TRACEBEGIN(TRCSUBSYSBACK, TRCSCOPEINTERN, "CFormatRunPtr::MergeRuns");
LONG cch;
LONG cRuns = iRun - _iRun;
LONG iDirection = 1; // Default going forward
CFormatRun *pRun;
_TEST_INVARIANT_
if(cRuns < 0)
{
cRuns = -cRuns;
iDirection = -1;
}
if(!IsValid()) // Allow starting run to be
{ // invalid
Assert(FALSE); // I think this is old...
ChgRun(iDirection);
}
while(cRuns--)
{
if(!GetRun(0)->_cch && !_iRun && _iRun < Count() - 1)
{
if(iDirection > 0)
PrevRun();
Remove(1, pf);
continue;
}
pRun = GetRun(0); // Save the current run
if(!ChgRun(iDirection)) // Go to next (or prev) run
return; // No more runs to check
if(pRun->SameFormat(GetRun(0)))
{ // Like formatted runs
if(iDirection > 0) // Point at the first of the
PrevRun(); // two runs
cch = GetRun(0)->_cch; // Save its count
Remove(1, pf); // Remove it
GetRun(0)->_cch += cch; // Add its count to the other's,
} // i.e., they're merged
}
}
/*
* CFormatRunPtr::Remove(cRun, flag, pf)
*
* @mfunc
* Remove cRun runs starting at _iRun
*/
void CFormatRunPtr::Remove(
LONG cRun,
IFormatCache *pf)
{
CFormatRun *pRun = GetRun(0); // Point at run(s) to delete
for(LONG j = 0; j < cRun; j++, IncPtr(pRun))
pf->Release(pRun->_iFormat); // Decrement run reference count
CRunPtr<CFormatRun>::Remove(cRun);
}
/*
* CFormatRunPtr::SetFormat(ifmt, cch, pf, pLevel)
*
* @mfunc
* Set format for up to cch chars of this run to ifmt, splitting run
* as needed, and returning the character count actually processed
*
* @rdesc
* character count of run chunk processed, CP_INFINITE on failure
* this points at next run
*
* Comments:
* Changes this run ptr. cch must be >= 0.
*
* Note 1) for the first run in a series, _ich may not = 0, and 2) cch
* may be <lt>, =, or <gt> the count remaining in the run. The algorithm
* doesn't split runs when the format doesn't change.
*/
LONG CFormatRunPtr::SetFormat(
LONG ifmt, //@parm format index to use
LONG cch, //@parm character count of remaining format range
IFormatCache * pf, //@parm pointer to IFormatCache to
CBiDiLevel* pLevel) //@parm pointer to BiDi level structure
{
TRACEBEGIN(TRCSUBSYSBACK, TRCSCOPEINTERN, "CFormatRunPtr::SetFormat");
// AddRefFormat/ReleaseFormat
LONG cchChunk;
LONG iFormat;
CFormatRun * pRun;
CFormatRun * pChgRun; // run that was reformatted
CBiDiLevel level;
_TEST_INVARIANT_
if(!IsValid())
return 0;
pRun = GetRun(0); // pRun points at current run in
cchChunk = pRun->_cch - _ich; // this function
iFormat = pRun->_iFormat;
level = pRun->_level;
pChgRun = pRun;
AssertSz(cch, "Have to have characters to format!");
AssertSz(pRun->_cch, "uh-oh, empty format run detected");
if(ifmt != iFormat || (pLevel && level != *pLevel)) // New and current formats differ
{
AssertSz(cchChunk, "Caller did not call AdjustForward");
if(_ich) // Not at either end of run: need
{ // to split into two runs of
if(!(pRun = Insert(1))) // counts _ich and _pRun->_cch
{ // - _ich, respectively
return CP_INFINITE; // Out of RAM: do nothing; just
} // keep current format
pRun->_cch = _ich;
pRun->_iFormat = iFormat; // New run has same format
pRun->_level = level; // and same level
pf->AddRef(iFormat); // Increment format ref count
NextRun(); // Go to second (original) run
IncPtr(pRun); // Point pRun at current run
pRun->_cch = cchChunk; // Note: IncPtr is a bit more
pChgRun = pRun;
} // efficient than GetRun, but
// trickier to code right
if(cch < cchChunk) // cch doesn't cover whole run:
{ // need to split into two runs
if(!(pRun = Insert(1)))
{
// Out of RAM, so formatting's wrong, oh well. We actually
// "processed" all of the characters, so return that (though
// the tail end formatting isn't split out right)
return cch;
}
pRun->_cch = cch; // New run gets the cch
pRun->_iFormat = ifmt; // and the new format
pChgRun = pRun;
IncPtr(pRun); // Point pRun at current run
pRun->_cch = cchChunk - cch; // Set leftover count
}
else // cch as big or bigger than
{ // current run
pf->Release(iFormat); // Free run's current format
pRun->_iFormat = ifmt; // Change it to new format
pChgRun = pRun;
} // May get merged later
pf->AddRef(ifmt); // Increment new format ref count
}
else if( cchChunk == 0 )
{
pRun->_cch += cch;
cchChunk = cch;
}
// record embedding level to changed run
if (pLevel)
pChgRun->_level = *pLevel;
cch = min(cch, cchChunk);
AdvanceCp(cch);
AdjustForward();
return cch;
}
/*
* CFormatRunPtr::GetFormat()
*
* @mfunc
* return format index at current run pointer position
*
* @rdesc
* current format index
*/
short CFormatRunPtr::GetFormat() const
{
TRACEBEGIN(TRCSUBSYSBACK, TRCSCOPEINTERN, "CFormatRunPtr::GetFormat");
_TEST_INVARIANT_
return IsValid() ? GetRun(0)->_iFormat : -1;
}
/*
* CFormatRunPtr::SplitFormat(IFormatCache*)
*
* @mfunc
* Split a format run
*
* @rdesc
* If succeeded the run pointer moves to the next splitted run
*/
void CFormatRunPtr::SplitFormat(IFormatCache* pf)
{
if (!_ich || _ich == GetRun(0)->_cch)
return;
CFormatRun* pRun = GetRun(0);
LONG iFormat = pRun->_iFormat;
LONG cch = pRun->_cch - _ich;
CBiDiLevel level = pRun->_level;
if (pRun = Insert(1))
{
pRun->_cch = _ich;
pRun->_iFormat = iFormat;
pRun->_level = level;
pf->AddRef(iFormat);
NextRun();
IncPtr(pRun);
pRun->_cch = cch;
}
}
/*
* CFormatRunPtr::SetLevel(level)
*
* @mfunc
* Set run's embedding level
*/
void CFormatRunPtr::SetLevel (CBiDiLevel& level)
{
if (!IsValid())
{
Assert(FALSE);
return;
}
CFormatRun* pRun = GetRun(0);
if (pRun)
pRun->_level = level;
}
BYTE CFormatRunPtr::GetLevel (CBiDiLevel* pLevel)
{
CFormatRun* pRun;
if (!IsValid() || !(pRun = GetRun(0)))
{
Assert(FALSE);
if (pLevel)
{
pLevel->_value = 0;
pLevel->_fStart = FALSE;
}
return 0;
}
if (pLevel)
*pLevel = pRun->_level;
return pRun->_level._value;
}
/*
* CFormatRunPtr::AdjustFormatting(cch, pf)
*
* @mfunc
* Use the same format index for the cch chars at this run ptr
* as that immediately preceeding it (if on run edge).
*
* @devnote
* This runptr ends up pointing at what was the preceeding run,
* since the current run has been moved into the preceeding run.
*
* FUTURE: might be better to take the cch equal to chars in
* the following run.
*/
void CFormatRunPtr::AdjustFormatting(
LONG cch, //@parm Count of chars to extend formatting
IFormatCache *pf) //@parm Format cache ptr for AddRef/Release
{
if(!IsValid())
return; // Nothing to merge
CFormatRunPtr rp(*this);
CBiDiLevel level;
// Move this run ptr to end of
AdjustBackward(); // preceeding run (if at run edge)
rp.AdjustForward(); // (merge may delete run at entry)
if(_iRun != rp._iRun) // On a format edge: copy previous
{ // format index over
GetLevel(&level);
rp.SetFormat(GetFormat(), cch, pf, &level); // Format cch chars at this
rp.MergeRuns(_iRun, pf); // runptr
}
}
///////////////////////////// CCFRunPtr ///////////////////////////////
CCFRunPtr::CCFRunPtr(const CRchTxtPtr &rtp)
: CFormatRunPtr(rtp._rpCF)
{
_ped = rtp.GetPed();
}
CCFRunPtr::CCFRunPtr(const CFormatRunPtr &rp, CTxtEdit *ped)
: CFormatRunPtr(rp)
{
_ped = ped;
}
/*
* CCFRunPtr::IsMask(dwMask, MaskOp)
*
* @mfunc
* return TRUE according to the mask operation MaskOp operating on
* _dwEffects.
*
* @rdesc
* TRUE if bits in CCharFormat::dwEffects correspond to those in dwMask
*/
BOOL CCFRunPtr::IsMask(
DWORD dwMask, //@parm Bit mask to use on dwEffects
MASKOP MaskOp) //@parm Logic operation for bits
{
DWORD dwEffects = _ped->GetCharFormat(GetFormat())->_dwEffects;
if(MaskOp == MO_EXACT) // Bit masks must be identical
return dwEffects == dwMask;
dwEffects &= dwMask;
if(MaskOp == MO_OR) // TRUE if one or more effect bits
return dwEffects != 0; // identified by mask are on
if(MaskOp == MO_AND) // TRUE if all effect bits
return dwEffects == dwMask; // identified by mask are on
AssertSz(FALSE, "CCFRunPtr::IsMask: illegal mask operation");
return FALSE;
}
/*
* CCFRunPtr::IsInHidden()
*
* @mfunc
* return TRUE if CCharFormat for this run ptr has CFE_HIDDEN bit set
*
* @rdesc
* TRUE if CCharFormat for this run ptr has CFE_HIDDEN bit set
*/
BOOL CCFRunPtr::IsInHidden()
{
AdjustForward();
BOOL fHidden = IsHidden();
if(_ich)
return fHidden;
AdjustBackward();
return fHidden && IsHidden();
}
/*
* CCFRunPtr::FindUnhidden()
*
* @mfunc
* Find nearest expanded CF going forward. If none, find nearest going
* backward. If none, go to start of document
*
* @rdesc
* cch to nearest expanded CF as explained in function description
*
* @devnote
* changes this run ptr
*/
LONG CCFRunPtr::FindUnhidden()
{
LONG cch = FindUnhiddenForward();
if(IsHidden())
cch = FindUnhiddenBackward();
return cch;
}
/*
* CCFRunPtr::FindUnhiddenForward()
*
* @mfunc
* Find nearest expanded CF going forward. If none, go to EOD
*
* @rdesc
* cch to nearest expanded CF going forward
*
* @devnote
* changes this run ptr
*/
LONG CCFRunPtr::FindUnhiddenForward()
{
LONG cch = 0;
AdjustForward();
while(IsHidden())
{
cch += GetCchLeft();
if(!NextRun())
break;
}
return cch;
}
/*
* CCFRunPtr::MatchFormatSignature
*
* @mfunc
* Match the current format's font signature with the script (index to codepage).
* It takes care single-codepage fonts which implicitly supports ASCII range.
*
* @rdesc
* return how font matched
*/
inline int CCFRunPtr::MatchFormatSignature (
const CCharFormat* pCF,
int iScript,
int iMatchCurrent,
DWORD* pdwFontSig)
{
DWORD dwFontSig = 0;
if (GetFontSignatureFromFace(pCF->_iFont, &dwFontSig) != 0)
{
if (pdwFontSig)
*pdwFontSig = dwFontSig;
if (iMatchCurrent & MATCH_ASCII && fc().GetInfoFlags(pCF->_iFont).fNonBiDiAscii)
return MATCH_ASCII;
if (W32->GetFontSigFromScript(iScript) & ~(fASCII >> 8) & dwFontSig)
return MATCH_FONT_SIG;
}
return 0;
}
/*
* CCFRunPtr::GetPreferredFontInfo( cpg, bCharSet, iFont, yHeight, bPitchAndFamily,
* iFormat, iMatchCurrent )
*
* @mfunc
* Find the preferred font for the given code page around the range.
*
* @rdesc
* boolean true if suitable font found, false otherwise.
*/
bool CCFRunPtr::GetPreferredFontInfo(
int cpg,
BYTE& bRetCharSet,
SHORT& iFont,
SHORT& yHeight, // return in twips
BYTE& bPitchAndFamily,
int iFormat,
int iMatchCurrent)
{
int i, iScript;
bool fr = false;
static int const MAX_FONTSEARCH = 256;
const CCharFormat *pCF;
const CCharFormat *pCFCurrent;
const CCharFormat *pCFPrevious = NULL;
int iMatch = 0; // how signature match?
DWORD dwCurrentFontSig = 0;
SHORT yNewHeight = 0;
BYTE bCharSet = GetCharSet(cpg, &iScript);
bool fUseUIFont = _ped->fUseUIFont() || _ped->Get10Mode();
Assert(!(iMatchCurrent & MATCH_ASCII) || bCharSet == ANSI_CHARSET);
if(_ped->fUseUIFont())
pCFCurrent = _ped->GetCharFormat(-1); // Plain text or UI font specified
else
pCFCurrent = _ped->GetCharFormat(iFormat != -1 ? iFormat : GetFormat());
if ((iMatchCurrent & MATCH_FONT_SIG) &&
(iMatch = MatchFormatSignature(pCFCurrent, iScript, iMatchCurrent, &dwCurrentFontSig)) != 0)
{
pCF = pCFCurrent; // Setup to use it
}
else
{
// Try searching backwards
if (IsValid()) // If doc has CF runs
AdjustBackward();
i = MAX_FONTSEARCH; // Don't be searching for years
pCF = _ped->GetCharFormat(GetFormat());
while (i--)
{
if (bCharSet == pCF->_bCharSet) // Equal charset ids?
{
pCFPrevious = pCF;
break;
}
if (!PrevRun()) // Done searching?
break;
pCF = _ped->GetCharFormat(GetFormat());
}
pCF = pCFPrevious;
}
// Try match charset if requested
if(!pCF && iMatchCurrent == MATCH_CURRENT_CHARSET)
{
CCcs* pccs = fc().GetCcs(pCFCurrent, W32->GetYPerInchScreenDC());
if (pccs)
{
if (pccs->BestCharSet(bCharSet, 1, MATCH_CURRENT_CHARSET) != 1)
pCF = pCFCurrent; // Current font can do it
pccs->Release();
}
}
// Try default document format
if (!pCF)
{
pCF = _ped->GetCharFormat(-1);
if (bCharSet != pCF->_bCharSet) // Diff charset ids?
pCF = NULL;
}
yHeight = pCFCurrent->_yHeight; // assume current height
if (!pCF)
{
// Default to table if no match.
fr = W32->GetPreferredFontInfo(
cpg, fUseUIFont, iFont, (BYTE&)yNewHeight, bPitchAndFamily );
if (!_ped->_fAutoFontSizeAdjust && (cpg == CP_THAI || cpg == THAI_INDEX))
// Kick in font size adjusting in first bind to Thai.
_ped->_fAutoFontSizeAdjust = TRUE;
}
if (pCF)
{
// Found previous or current font
iFont = pCF->_iFont;
bPitchAndFamily = pCF->_bPitchAndFamily;
if (pCF == pCFCurrent && (iMatchCurrent & MATCH_FONT_SIG) &&
(IsFECharSet(pCF->_bCharSet) && W32->IsFECodePageFont(dwCurrentFontSig) ||
iMatch == MATCH_ASCII && bCharSet == ANSI_CHARSET))
{
// The current font matches the requested signature.
// If it's a FarEast or ASCII font. We leave the charset intact.
bRetCharSet = pCF->_bCharSet;
return true;
}
}
if (_ped->_fAutoFontSizeAdjust && iFont != pCFCurrent->_iFont)
{
if (IsValid())
{
// If the last run format is available. We will scale the size relative to it.
AdjustBackward();
if (GetIch() > 0)
{
pCFCurrent = _ped->GetCharFormat(GetFormat());
yHeight = pCFCurrent->_yHeight;
}
AdjustForward();
}
if (iFont != pCFCurrent->_iFont)
{
// Scale the height relative to the preceding format
if (pCF)
yNewHeight = GetFontLegitimateSize(iFont, fUseUIFont, cpg);
if (yNewHeight)
{
// Get legitimate size of the current font
SHORT yDefHeight = GetFontLegitimateSize(pCFCurrent->_iFont, fUseUIFont, GetCodePage(pCFCurrent->_bCharSet));
// Calculate the new height relative to the current height
if (yDefHeight)
{
if (fUseUIFont)
{
// For UIFont, we only convert from one preferred size to another preferred size.
if (pCFCurrent->_yHeight / TWIPS_PER_POINT == yDefHeight)
yHeight = yNewHeight * TWIPS_PER_POINT;
}
else
yHeight = (SHORT)MulDiv(pCFCurrent->_yHeight, yNewHeight, yDefHeight);
}
}
}
}
if (!yHeight)
yHeight = (SHORT)MulDiv(pCFCurrent->_yHeight, yNewHeight, 10);
return pCF || fr;
}
/*
* CCFRunPtr::FindUnhiddenBackward()
*
* @mfunc
* Find nearest expanded CF going backward. If none, go to BOD
*
* @rdesc
* cch to nearest expanded CF going backward
*
* @devnote
* changes this run ptr
*/
LONG CCFRunPtr::FindUnhiddenBackward()
{
LONG cch = 0;
AdjustBackward();
while(IsHidden())
{
cch -= GetIch();
if(!_iRun)
break;
_ich = 0;
AdjustBackward();
}
return cch;
}
///////////////////////////// CPFRunPtr ///////////////////////////////
CPFRunPtr::CPFRunPtr(const CRchTxtPtr &rtp)
: CFormatRunPtr(rtp._rpPF)
{
_ped = rtp.GetPed();
}
/*
* CPFRunPtr::FindHeading(cch, lHeading)
*
* @mfunc
* Find heading with number lHeading (e.g., = 1 for Heading 1) or above
* in a range starting at this PFrun pointer. If successful, this run
* ptr points at the matching run; else it remains unchanged.
*
* @rdesc
* cch to matching heading or tomBackward if not found
*
* @devnote
* changes this run ptr
*/
LONG CPFRunPtr::FindHeading(
LONG cch, //@parm Max cch to move
LONG& lHeading) //@parm Lowest lHeading to match
{
LONG cchSave = cch;
LONG ichSave = _ich;
LONG iRunSave = _iRun;
LONG OutlineLevel;
Assert((unsigned)lHeading <= NHSTYLES);
if(!IsValid())
return tomBackward;
while(TRUE)
{
OutlineLevel = GetOutlineLevel();
if (!(OutlineLevel & 1) &&
(!lHeading || (lHeading - 1)*2 >= OutlineLevel))
{
lHeading = OutlineLevel/2 + 1; // Return heading # found
return cchSave - cch; // Return how far away it was
}
if(cch >= 0)
{
cch -= GetCchLeft();
if(cch <= 0 || !NextRun())
break;
}
else
{
cch += GetIch();
if(cch > 0 || !_iRun)
break;
AdjustBackward();
}
}
_ich = ichSave;
_iRun = iRunSave;
return tomBackward; // Didn't find desired heading
}
/*
* CPFRunPtr::IsCollapsed()
*
* @mfunc
* return TRUE if CParaFormat for this run ptr has PFE_COLLAPSED bit set
*
* @rdesc
* TRUE if CParaFormat for this run ptr has PFE_COLLAPSED bit set
*/
BOOL CPFRunPtr::IsCollapsed()
{
return (_ped->GetParaFormat(GetFormat())->_wEffects & PFE_COLLAPSED) != 0;
}
/*
* CPFRunPtr::InTable()
*
* @mfunc
* return TRUE if CParaFormat for this run ptr has PFE_TABLE bit set
*
* @rdesc
* TRUE if CParaFormat for this run ptr has PFE_TABLE bit set
*/
BOOL CPFRunPtr::InTable()
{
return (_ped->GetParaFormat(GetFormat())->_wEffects & PFE_TABLE) != 0;
}
/*
* CPFRunPtr::FindExpanded()
*
* @mfunc
* Find nearest expanded PF going forward. If none, find nearest going
* backward. If none, go to start of document
*
* @rdesc
* cch to nearest expanded PF as explained in function description
*
* @devnote
* advances this run ptr the amount returned (cch)
*/
LONG CPFRunPtr::FindExpanded()
{
LONG cch, cchRun;
for(cch = 0; IsCollapsed(); cch += cchRun) // Try to find expanded PF
{ // run going forward
cchRun = GetCchLeft();
if(!NextRun()) // Aren't any
{
AdvanceCp(-cch); // Go back to starting point
return FindExpandedBackward(); // Try to find expanded PF
} // run going backward
}
return cch;
}
/*
* CPFRunPtr::FindExpandedForward()
*
* @mfunc
* Find nearest expanded PF going forward. If none, go to EOD
*
* @rdesc
* cch to nearest expanded PF going forward
*
* @devnote
* advances this run ptr the amount returned (cch)
*/
LONG CPFRunPtr::FindExpandedForward()
{
LONG cch = 0;
while(IsCollapsed())
{
LONG cchLeft = GetCchLeft();
_ich += cchLeft; // Update _ich in case
cch += cchLeft; // if(!NextRun()) breaks
if(!NextRun())
break;
}
return cch;
}
/*
* CPFRunPtr::FindExpandedBackward()
*
* @mfunc
* Find nearest expanded PF going backward. If none, go to BOD
*
* @rdesc
* cch to nearest expanded PF going backward
*
* @devnote
* advances this run ptr the amount returned (cch)
*/
LONG CPFRunPtr::FindExpandedBackward()
{
LONG cch = 0;
while(IsCollapsed())
{
cch -= GetIch();
_ich = 0;
if(!_iRun)
break;
AdjustBackward();
}
return cch;
}
/*
* CPFRunPtr::GetOutlineLevel()
*
* @mfunc
* Find outline level this rp is pointing at
*
* @rdesc
* Outline level this rp is pointing at
*/
LONG CPFRunPtr::GetOutlineLevel()
{
const CParaFormat *pPF = _ped->GetParaFormat(GetFormat());
LONG OutlineLevel = pPF->_bOutlineLevel;
AssertSz(IsHeadingStyle(pPF->_sStyle) ^ (OutlineLevel & 1),
"CPFRunPtr::GetOutlineLevel: sStyle/bOutlineLevel mismatch");
return OutlineLevel;
}
/*
* CPFRunPtr::GetStyle()
*
* @mfunc
* Find style this rp is pointing at
*
* @rdesc
* Style this rp is pointing at
*/
LONG CPFRunPtr::GetStyle()
{
const CParaFormat *pPF = _ped->GetParaFormat(GetFormat());
LONG Style = pPF->_sStyle;
AssertSz(IsHeadingStyle(Style) ^ (pPF->_bOutlineLevel & 1),
"CPFRunPtr::GetStyle: sStyle/bOutlineLevel mismatch");
return Style;
}