192 lines
6.2 KiB
C
192 lines
6.2 KiB
C
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/*
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* _DISPML.H
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*
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* Purpose:
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* CDisplayML class. Multi-line display.
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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 _DISPML_H
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#define _DISPML_H
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#include "_disp.h"
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class CDisplayML : public CDisplay, public CLineArray
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{
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public:
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#ifdef DEBUG
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BOOL Invariant(void) const;
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#endif
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friend class CLinePtr;
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friend class CLed;
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friend BOOL CTxtEdit::OnDisplayBand(const RECT *prc, BOOL fPrintFromDraw);
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friend class CDisplayPrinter;
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private:
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LONG _cpCalcMax; // last cp for which line breaks have been calc'd + 1
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LONG _yCalcMax; // height of calculated lines
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LONG _cpWait; // cp WaitForRecalc() is waiting for (or < 0)
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LONG _yWait; // y WaitForRecalc() is waiting for (or < 0)
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LONG _yScroll; // vertical scroll position of visible view
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LONG _dyFirstVisible; // offset from top of view to first visible line
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LONG _iliFirstVisible; // index of first visible line
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LONG _xWidthMax; // max width of this display (in log unit)
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LONG _yHeightMax; // max height of this display (-1 for infinite)
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LONG _xWidth; // width of longest calculated line
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LONG _yHeight; // sum of heights of calculated lines
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LONG _cpMin; // first character in display
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CDevDesc *_pddTarget; // target device (if any).
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unsigned long _fInRecalcScrollBars:1; // we're trying to recalc scroll
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// bars
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private:
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// Helpers
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void InitVars();
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void RecalcScrollBars();
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LONG ConvertScrollToYPos(LONG yPos);
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LONG GetMaxYScroll() const;
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BOOL CreateEmptyLine();
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LONG CalcScrollHeight(LONG yHeight) const;
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void RebindFirstVisible();
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// Line breaking
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BOOL RecalcLines(BOOL fWait = FALSE);
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BOOL RecalcLines(const CRchTxtPtr &tpFirst, LONG cchOld, LONG cchNew,
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BOOL fBackground, BOOL fWait, CLed *pled);
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BOOL RecalcSingleLine(CLed *pled);
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LONG CalcDisplayWidth();
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// Rendering
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virtual void Render(const RECT &rcView, const RECT &rcRender);
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// Scrolling and scroller bars
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void DeferUpdateScrollBar();
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BOOL DoDeferredUpdateScrollBar();
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virtual BOOL UpdateScrollBar(INT nBar, BOOL fUpdateRange = FALSE );
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protected:
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virtual LONG GetMaxXScroll() const;
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public:
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virtual LONG ConvertYPosToScrollPos(LONG yPos);
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CDisplayML (CTxtEdit* ped);
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virtual CDisplayML::~CDisplayML();
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virtual BOOL Init();
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// Device context management
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virtual BOOL SetMainTargetDC(HDC hdc, LONG xWidthMax);
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virtual BOOL SetTargetDC(HDC hdc, LONG dxpInch = -1, LONG dypInch = -1);
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// Getting properties
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virtual void InitLinePtr ( CLinePtr & );
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virtual const CDevDesc* GetDdTarget() const {return _pddTarget;}
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virtual BOOL IsMain() const {return TRUE;}
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BOOL IsInOutlineView() const {return _ped->IsInOutlineView();}
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// maximum height and width
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virtual LONG GetMaxWidth() const {return _xWidthMax;}
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virtual LONG GetMaxHeight() const {return 0;}
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virtual LONG GetMaxPixelWidth() const;
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// Width, height and line count (of all text)
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virtual LONG GetWidth() const {return _xWidth;}
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virtual LONG GetHeight() const {return _yHeight;}
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virtual LONG GetResizeHeight() const;
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virtual LONG LineCount() const;
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// Visible view properties
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virtual LONG GetCliVisible(
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LONG *pcpMostVisible = NULL,
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BOOL fLastCharOfLastVisible = FALSE) const;
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virtual LONG GetFirstVisibleLine() const {return _iliFirstVisible;}
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// Line info
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virtual LONG GetLineText(LONG ili, TCHAR *pchBuff, LONG cchMost);
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virtual LONG CpFromLine(LONG ili, LONG *pyLine = NULL);
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LONG YposFromLine(LONG ili);
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virtual LONG LineFromYpos(LONG yPos, LONG *pyLine = NULL, LONG *pcpFirst = NULL);
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virtual LONG LineFromCp(LONG cp, BOOL fAtEnd) ;
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// Point <-> cp conversion
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virtual LONG CpFromPoint(
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POINT pt,
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const RECT *prcClient,
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CRchTxtPtr * const ptp,
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CLinePtr * const prp,
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BOOL fAllowEOL,
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HITTEST *pHit = NULL,
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CDispDim *pdispdim = NULL,
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LONG *pcpActual = NULL);
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virtual LONG PointFromTp (
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const CRchTxtPtr &tp,
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const RECT *prcClient,
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BOOL fAtEnd,
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POINT &pt,
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CLinePtr * const prp,
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UINT taMode,
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CDispDim *pdispdim = NULL);
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// Line break recalc
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BOOL StartBackgroundRecalc();
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virtual VOID StepBackgroundRecalc();
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virtual BOOL RecalcView(BOOL fUpdateScrollBars, RECT* prc = NULL);
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virtual BOOL WaitForRecalc(LONG cpMax, LONG yMax);
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virtual BOOL WaitForRecalcIli(LONG ili);
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virtual BOOL WaitForRecalcView();
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// Complete updating (recalc + rendering)
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virtual BOOL UpdateView(const CRchTxtPtr &tpFirst, LONG cchOld, LONG cchNew);
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// Scrolling
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virtual LRESULT VScroll(WORD wCode, LONG xPos);
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virtual VOID LineScroll(LONG cli, LONG cch);
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virtual VOID FractionalScrollView ( LONG yDelta );
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virtual VOID ScrollToLineStart(LONG iDirection);
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virtual LONG CalcYLineScrollDelta ( LONG cli, BOOL fFractionalFirst );
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virtual BOOL ScrollView(LONG xScroll, LONG yScroll, BOOL fTracking, BOOL fFractionalScroll);
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virtual LONG GetYScroll() const;
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virtual LONG GetScrollRange(INT nBar) const;
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virtual LONG AdjustToDisplayLastLine(LONG yBase, LONG yScroll);
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// Selection
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virtual BOOL InvertRange(LONG cp, LONG cch, SELDISPLAYACTION selAction);
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// Natural size calculation
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virtual HRESULT GetNaturalSize(
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HDC hdcDraw,
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HDC hicTarget,
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DWORD dwMode,
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LONG *pwidth,
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LONG *pheight);
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// Misc. methods
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void FindParagraph(LONG cpMin, LONG cpMost, LONG *pcpMin, LONG *pcpMost);
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virtual CDisplay *Clone() const;
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#ifdef DEBUG
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void CheckLineArray() const;
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void DumpLines(LONG iliFirst, LONG cli);
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void CheckView();
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BOOL VerifyFirstVisible(LONG *pHeight = NULL);
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#endif
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};
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#endif
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