219 lines
7.1 KiB
C
219 lines
7.1 KiB
C
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/*
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* _MEASURE.H
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*
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* Purpose:
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* CMeasurer class
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*
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* Authors:
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* Original RichEdit code: David R. Fulmer
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* Christian Fortini
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* Murray Sargent
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*
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* Copyright (c) 1995-2000 Microsoft Corporation. All rights reserved.
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*/
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#ifndef _MEASURE_H
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#define _MEASURE_H
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#include "_rtext.h"
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#include "_line.h"
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#include "_disp.h"
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#ifndef NOLINESERVICES
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#include "_ols.h"
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#endif
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class CCcs;
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class CDevDesc;
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class CPartialUpdate;
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class CUniscribe;
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class COleObject;
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const short BITMAP_WIDTH_SUBTEXT = 4;
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const short BITMAP_HEIGHT_SUBTEXT = 4;
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const short BITMAP_WIDTH_HEADING = 10;
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const short BITMAP_HEIGHT_HEADING = 10;
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#define TA_STARTOFLINE 32768
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#define TA_ENDOFLINE 16384
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#define TA_LOGICAL 8192
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#define TA_CELLTOP 4096
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// =========================== CMeasurer ===============================
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// CMeasurer - specialized rich text pointer used to compute text metrics.
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// All metrics are computed and stored in device units for the device
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// indicated by _pdd.
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class CMeasurer : public CRchTxtPtr
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{
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friend class CLayout;
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friend class CDisplay;
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friend class CDisplayML;
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friend class CDisplayPrinter;
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friend class CDisplaySL;
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friend class CLine;
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friend struct COls;
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friend class CUniscribe;
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#ifndef NOLINESERVICES
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friend LSERR WINAPI OlsOleFmt(PLNOBJ plnobj, PCFMTIN pcfmtin, FMTRES *pfmres);
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friend LSERR WINAPI OlsGetRunTextMetrics(POLS pols, PLSRUN plsrun,
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enum lsdevice deviceID, LSTFLOW kTFlow, PLSTXM plsTxMet);
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friend LSERR WINAPI OlsFetchPap(POLS pols, LSCP cpLs, PLSPAP plspap);
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friend LSERR WINAPI OlsGetRunCharKerning(POLS, PLSRUN, LSDEVICE, LPCWSTR, DWORD, LSTFLOW, int*);
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friend LSERR WINAPI OlsFetchTabs(POLS, LSCP, PLSTABS, BOOL*,long *, WCHAR*);
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#endif
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public:
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CMeasurer (const CDisplay* const pdp);
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CMeasurer (const CDisplay* const pdp, const CRchTxtPtr &rtp);
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virtual ~CMeasurer();
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const CDisplay* GetPdp() const {return _pdp;}
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void AdjustLineHeight();
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COleObject *GetObjectFromCp(LONG cp) const
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{return GetPed()->GetObjectMgr()->GetObjectFromCp(cp);}
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#ifndef NOLINESERVICES
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COls * GetPols();
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CUniscribe* Getusp() const { return GetPed()->Getusp(); }
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#endif
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CCcs* GetCcs(const CCharFormat *pCF);
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CCcs* GetCcsFontFallback(const CCharFormat *pCF, WORD wScript);
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CCcs* ApplyFontCache(BOOL fFallback, WORD wScript);
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void CheckLineHeight();
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CCcs * Check_pccs(BOOL fBullet = FALSE);
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LONG GetNumber() const {return _wNumber;}
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WCHAR GetPasswordChar() const {return _chPassword;}
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const CParaFormat *Get_pPF() {return _pPF;}
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LONG GetCch() const {return _li._cch;}
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void SetCch(LONG cch) {_li._cch = cch;}
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CLine & GetLine(void) {return _li;}
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LONG GetRightIndent() {return _upRight;}
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HITTEST HitTest(LONG x);
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BOOL fFirstInPara() const {return _li._fFirstInPara;}
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BOOL fUseLineServices() const {return GetPed()->fUseLineServices();}
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BOOL IsRenderer() const {return _fRenderer;}
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BOOL IsMeasure() const {return _fMeasure;}
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LONG LUtoDU(LONG u) { return MulDiv(u, _fTarget ? _durInch : _dupInch, LX_PER_INCH);}
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LONG LVtoDV(LONG v) { return MulDiv(v, _fTarget ? _dvrInch : _dvpInch, LX_PER_INCH);}
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const CLayout *GetLayout() {return _plo;}
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void SetLayout(const CLayout *plo) {_plo = plo;}
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LONG GetDulLayout() {return _dulLayout;}
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LONG GetCchLine() const {return _cchLine;}
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LONG GetPBorderWidth(LONG dxlLine);
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void SetDulLayout(LONG dul) {_dulLayout = dul;}
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void SetIhyphPrev(LONG ihyphPrev) {_ihyphPrev = ihyphPrev;}
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LONG GetIhyphPrev(void) {return _ihyphPrev;}
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TFLOW GetTflow() const {return _pdp->GetTflow();}
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void NewLine(BOOL fFirstInPara);
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void NewLine(const CLine &li);
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LONG MeasureLeftIndent();
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LONG MeasureRightIndent();
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LONG MeasureLineShift();
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LONG MeasureText(LONG cch);
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BOOL MeasureLine(UINT uiFlags, CLine* pliTarget = NULL);
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LONG MeasureTab(unsigned ch);
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void SetNumber(WORD wNumber);
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void UpdatePF() {_pPF = GetPF();}
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LONG XFromU(LONG u);
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LONG UFromX(LONG x);
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CCcs* GetCcsBullet(CCharFormat *pcfRet);
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void SetUseTargetDevice(BOOL fUseTargetDevice);
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BOOL FUseTargetDevice(void) {return _fTarget || _dvpInch == _dvrInch;}
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BOOL FAdjustFELineHt() {return !(GetPed()->Get10Mode()) && !fUseUIFont() && _pdp->IsMultiLine();}
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void SetGlyphing(BOOL fGlyphing);
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protected:
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void Init(const CDisplay *pdp);
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LONG Measure(LONG dulMax, LONG cchMax, UINT uiFlags);
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LONG MeasureBullet();
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LONG GetBullet(WCHAR *pch, CCcs *pccs, LONG *pdup);
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void UpdateWrapState(USHORT &dvpLine, USHORT &dvpDescent);
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void UpdateWrapState(USHORT &dvpLine, USHORT &dvpDescent, BOOL fLeft);
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BOOL FormatIsChanged();
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void ResetCachediFormat();
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LONG DUtoLU(LONG u) {return MulDiv(u, LX_PER_INCH, _fTarget ? _durInch : _dupInch);}
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LONG FindCpDraw(LONG cpStart, int cobjectPrev, BOOL fLeft);
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private:
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void RecalcLineHeight(CCcs *,
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const CCharFormat * const pCF); // Helper to recalc max line height
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COleObject* FindFirstWrapObj(BOOL fLeft);
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void RemoveFirstWrap(BOOL fLeft);
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int CountQueueEntries(BOOL fLeft);
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void AddObjectToQueue(COleObject *pobjAdd);
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protected:
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CLine _li; // Line we are measuring
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const CDisplay* _pdp; // Display we are operating in
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const CDevDesc* _pddReference; // Reference device
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CArray<COleObject*> _rgpobjWrap;// A queue of objects to wrapped around
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LONG _dvpWrapLeftRemaining; //For objects being wrapped around,
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LONG _dvpWrapRightRemaining; //how much of the height is remaining
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LONG _dvrInch; // Resolution of reference device
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LONG _durInch;
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LONG _dvpInch; // Resolution of presentation device
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LONG _dupInch;
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LONG _dulLayout; // Width of layout we are measuring in
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LONG _cchLine; // If !_fMeasure, tells us number of chars on line
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CCcs* _pccs; // Current font cache
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const CParaFormat *_pPF; // Current CParaFormat
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const CLayout *_plo; // Current layout we are measuring in (0 if SL)
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LONG _dxBorderWidths;// Cell border widths
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SHORT _dupAddLast; // Last char considered but unused for line
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WCHAR _chPassword; // Password character if any
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WORD _wNumber; // Number offset
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SHORT _iFormat; // Current format
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SHORT _upRight; // Line right indent
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BYTE _ihyphPrev; // Hyphenation information for previous line
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// Used for support of khyphChangeAfter
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BYTE _fRenderer:1; // 0/1 for CMeasurer/CRenderer, resp.
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BYTE _fTarget:1; // TRUE if we are supposed to be using
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// reference metrics for laying out text
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BYTE _fFallback:1; // Current font cache is fallback font
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BYTE _fGlyphing:1; // In the process of creating glyphs
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BYTE _fMeasure:1; // TRUE if we are measuring. Else, we are
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// rendering or we are hit-testing which means we need
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// to justify the text and that data cached at measure time is valid.
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};
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// Values for uiFlags in MeasureLine()
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#define MEASURE_FIRSTINPARA 0x0001
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#define MEASURE_BREAKATWORD 0x0002
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#define MEASURE_BREAKBEFOREWIDTH 0x0004 // Breaks at character before target width
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#define MEASURE_IGNOREOFFSET 0x0008
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// Returned error codes for Measure(), MeasureText(), MeasureLine()
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#define MRET_FAILED -1
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#define MRET_NOWIDTH -2
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inline BOOL CMeasurer::FormatIsChanged()
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{
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return !_pccs || _iFormat != _rpCF.GetFormat() || _fFallback;
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}
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inline void CMeasurer::ResetCachediFormat()
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{
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_iFormat = _rpCF.GetFormat();
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}
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const int duMax = tomForward;
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#endif
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