182 lines
5 KiB
C++
182 lines
5 KiB
C++
/*
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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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#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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#ifdef LINESERVICES
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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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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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// =========================== 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 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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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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LONG GetDyrInch() {return _dyrInch;}
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LONG GetDxrInch() {return _dxrInch;}
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LONG GetDypInch() {return _dypInch;}
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LONG GetDxpInch() {return _dxpInch;}
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#ifdef LINESERVICES
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COls * GetPols(CMeasurer **ppme);
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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);
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CCcs* ApplyFontCache(BOOL fFallback);
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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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HITTEST HitTest(LONG x);
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BOOL fFirstInPara() const {return _li._bFlags & fliFirstInPara;}
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BOOL fUseLineServices() const {return GetPed()->fUseLineServices();}
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BOOL IsRenderer() const {return _fRenderer;}
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LONG LXtoDX(LONG x);
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LONG LYtoDY(LONG y);
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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(
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LONG cchMax,
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LONG xWidthMax,
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UINT uiFlags,
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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 || _dypInch == _dyrInch;}
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BOOL fAdjustFELineHt() {return _fAdjustFELineHt;}
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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 xWidthMax, LONG cchMax, UINT uiFlags);
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LONG MeasureBullet();
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LONG GetBullet(WCHAR *pch, CCcs *pccs, LONG *pxWidth);
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BOOL FormatIsChanged();
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void ResetCachediFormat();
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LONG DXtoLX(LONG x);
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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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LONG MaxWidth(); // Helper for calc max width
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protected:
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CLine _li; // Line we are measuring
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const CDevDesc* _pddReference; // Reference device
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LONG _dyrInch; // Resolution of reference device
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LONG _dxrInch;
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const CDisplay* _pdp; // Display we are operating in
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LONG _dypInch; // Resolution of presentation device
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LONG _dxpInch;
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CCcs* _pccs; // Current font cache
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const CParaFormat *_pPF; // Current CParaFormat
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SHORT _xAddLast; // 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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BYTE _dtRef; // Device Caps technology for reference device
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BYTE _dtPres; // Device Caps technology for presentation device
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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 _fAdjustFELineHt:1; // TRUE if we need to adjust line height
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// for FE run
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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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};
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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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#define MEASURE_DONTINIT 0x0020
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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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#endif
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