203 lines
6.4 KiB
C
203 lines
6.4 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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#include "_layout.h"
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class CDisplayML : public CDisplay, public CLayout
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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 CLayout;
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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 _vpCalcMax; // height of calculated lines
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LONG _cpWait; // cp WaitForRecalc() is waiting for (or < 0)
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LONG _vpWait; // vp WaitForRecalc() is waiting for (or < 0)
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LONG _vpScroll; // vertical scroll position of visible view
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LONG _dvpFirstVisible; // 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 _dulTarget; // max width of this display (in log unit)
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LONG _dvlTarget; // max height of this display (-1 for infinite)
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LONG _dupLineMax; // width of longest calculated line
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CDevDesc *_pddTarget; // Target device (if any).
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LONG _sPage; // Page # of _iliFirstVisible if PageView
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WORD _fInRecalcScrollBars:1; // Are trying to recalc scrollbars
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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 ConvertScrollToVPos(LONG vPos);
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LONG GetMaxVpScroll() const;
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BOOL CreateEmptyLine();
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LONG CalcScrollHeight(LONG yHeight) const;
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void RebindFirstVisible(BOOL fResetCp = FALSE);
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void Set_yScroll(LONG cp);
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void Sync_yScroll();
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// Line/page breaking
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BOOL RecalcLines(CRchTxtPtr &rtp, BOOL fWait);
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BOOL RecalcLines(CRchTxtPtr &rtp, 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 CalcDisplayDup();
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LONG CalculatePage(LONG iliFirst);
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// Rendering
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virtual void Render(const RECTUV &rcView, const RECTUV &rcRender);
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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 GetMaxUScroll() const;
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public:
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virtual BOOL Paginate(LONG iLineFirst, BOOL fRebindFirstVisible = FALSE);
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virtual HRESULT GetPage(LONG *piPage, DWORD dwFlags, CHARRANGE *pcrg);
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virtual HRESULT SetPage(LONG iPage);
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virtual LONG ConvertVPosToScrollPos(LONG vPos);
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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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virtual BOOL IsNestedLayout() const {return FALSE;}
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virtual TFLOW GetTflow() const {return CLayout::GetTflow();}
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virtual void SetTflow(TFLOW tflow) {CLayout::SetTflow(tflow);}
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// Device context management
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virtual BOOL SetMainTargetDC(HDC hdc, LONG dulTarget);
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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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// When wrapping to printer, return the width we are to wrap to (or 0)
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virtual LONG GetDulForTargetWrap() const {return _dulTarget;}
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// Get width of widest line
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virtual LONG GetDupLineMax() const {return _dupLineMax;}
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// Height and line count (of all text)
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virtual LONG GetHeight() const {return _dvp;}
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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 *pdvp = 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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POINTUV pt,
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const RECTUV *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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CLine *pliParent = NULL);
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virtual LONG PointFromTp (
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const CRchTxtPtr &tp,
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const RECTUV *prcClient,
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BOOL fAtEnd,
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POINTUV &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, RECTUV* prc = NULL);
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virtual BOOL WaitForRecalc(LONG cpMax, LONG vpMax);
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virtual BOOL WaitForRecalcIli(LONG ili);
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virtual BOOL WaitForRecalcView();
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virtual void RecalcLine(LONG cp);
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// Complete updating (recalc + rendering)
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virtual BOOL UpdateView(CRchTxtPtr &rtp, LONG cchOld, LONG cchNew);
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// Scrolling
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virtual LRESULT VScroll(WORD wCode, LONG uPos);
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virtual VOID LineScroll(LONG cli, LONG cch);
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virtual VOID FractionalScrollView ( LONG vDelta );
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virtual VOID ScrollToLineStart(LONG iDirection);
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virtual LONG CalcVLineScrollDelta ( LONG cli, BOOL fFractionalFirst );
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virtual BOOL ScrollView(LONG upScroll, LONG vpScroll, BOOL fTracking, BOOL fFractionalScroll);
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virtual LONG GetVpScroll() const { return _vpScroll; }
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virtual LONG GetScrollRange(INT nBar) const;
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virtual LONG AdjustToDisplayLastLine(LONG yBase, LONG vpScroll);
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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 LONG GetCurrentPageHeight() const;
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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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