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540 lines
15 KiB
540 lines
15 KiB
/*
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* _DISP.H
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*
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* Purpose:
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* DISP 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) 1995-1998, Microsoft Corporation. All rights reserved.
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*/
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#ifndef _DISP_H
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#define _DISP_H
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#include "_devdsc.h"
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#include "_line.h"
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#include "_edit.h"
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class CDisplay;
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class CLed;
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class CLinePtr;
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class CTxtStory;
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class CTxtEdit;
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class CRchTxtPtr;
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class CTxtRange;
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class CTxtSelection;
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#define INVALID_ZOOM_DENOMINATOR 0
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// Auto scroll timing
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#define cmsecScrollDelay 500
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#define cmsecScrollInterval 50
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class CDrawInfo;
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// ============================ CLed ====================================
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// Line Edit Descriptor - describes impact of an edit on line breaks
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class CLed
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{
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public:
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LONG _cpFirst; // cp of first affected line
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LONG _iliFirst; // index of first affected line
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LONG _yFirst; // y offset of first affected line
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LONG _cpMatchOld; // pre-edit cp of first matched line
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LONG _iliMatchOld; // pre-edit index of first matched line
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LONG _yMatchOld; // pre-edit y offset of first matched line
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LONG _cpMatchNew; // post-edit cp of first matched line
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LONG _iliMatchNew; // post-edit index of first matched line
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LONG _yMatchNew; // post-edit y offset of bottom of first matched line
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LONG _yMatchNewTop; // post-edit y offset of top of first matched line
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public:
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CLed();
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void SetMax(const CDisplay * const pdp);
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};
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inline CLed::CLed()
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{
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#ifdef DEBUG
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// We set this invalid so that we can assert on it in debug builds.
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_yMatchNewTop = -1;
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#endif // DEBUG
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}
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// An enumeration describing the various display actions we can perform on the selection
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enum SELDISPLAYACTION
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{
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selSetHiLite,
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selSetNormal,
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selUpdateHiLite,
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selUpdateNormal
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};
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class CDispDim
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{
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public:
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CDispDim(){ZeroMemory(this, sizeof(*this));}
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LONG dx;
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DWORD lstflow;
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};
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// Forward declaration to prevent recursion of definitions
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class CAccumDisplayChanges;
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// ========================== CDisplay ====================================
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// Display - keeps track of line breaks for a device.
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// All measurements are in pixels on rendering device,
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// EXCEPT xWidthMax and yHeightMax, which are in twips.
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class CDisplay : public CDevDesc, public ITxNotify
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{
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friend class CLinePtr;
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friend class CLed;
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#ifdef DEBUG
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public:
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BOOL Invariant ( void ) const;
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private:
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#endif
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public:
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// Average char width of system font
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static INT GetXWidthSys() { return W32->GetXWidthSys(); }
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// Height of system font
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static INT GetYHeightSys() { return W32->GetYHeightSys(); }
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private:
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static DWORD _dwTimeScrollNext; // time for next scroll step
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static DWORD _dwScrollLast; // last scroll action
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CDrawInfo * _pdi; // Draw info parameters
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protected:
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CAccumDisplayChanges *_padc; // Accumulated display changes if frozen
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DWORD _fBgndRecalc :1; // Background recalc is running
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DWORD _fDeferUpdateScrollBar:1; // Currently deferring updating scroll bars
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DWORD _fHScrollEnabled :1; // Horizontal scrolling enabled
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DWORD _fInBkgndRecalc :1; // Avoid reentrant background recalc
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DWORD _fLineRecalcErr :1; // Error occured during background recalc
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DWORD _fNoUpdateView :1; // Don't update visible view
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DWORD _fWordWrap :1; // Word wrap text
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DWORD _fNeedRecalc :1; // Recalc line is needed
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DWORD _fRecalcDone :1; // Is line recalc done ?
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DWORD _fViewChanged :1; // Visible view rect has changed since last Draw
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DWORD _fUpdateScrollBarDeferred:1;// scroll bars need to be updated
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DWORD _fVScrollEnabled :1; // vertical scrolling enabled
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DWORD _fUpdateCaret :1; // Whether Draw needs to update cursor
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DWORD _fActive :1; // Whether this display is active
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DWORD _fRectInvalid :1; // Entire client rectangle has been
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// invalidated. Used only in SL. Put
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// here, as usual, to save space
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DWORD _fSmoothVScroll :1; // Timer for smooth scrolling installed
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DWORD _fFinishSmoothVScroll:1;// TRUE if we're winding down the current smooth scroll
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DWORD _fMultiLine :1; // TRUE iff this CDisplay is multiline
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SHORT _xWidthView; // View rect width
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LONG _yHeightView; // View rect height
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LONG _yHeightClient; // Height of client rect unmodified by inset.
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LONG _xScroll; // Horizontal scroll position of visible view
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LONG _lTempZoomDenominator; // Zoom for GetNaturalSize
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LONG _cpFirstVisible; // cp at start of first visible line
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// Smooth scroll support.
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int _smoothYDelta; // Current # pixels * 1000 to smooth scroll by
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int _continuedSmoothYDelta; // At end of 1 smooth scroll cycle, start new with this
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int _nextSmoothVScroll; // Fractional amount not yet smooth scrolled
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int _totalSmoothVScroll; // Remaining # of device units to smooth scroll
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int _continuedSmoothVScroll;// At end of 1 smooth scroll cycle, start new with this
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private:
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void UpdateViewRectState(const RECT *prcClient);
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protected:
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LONG GetSelBarInPixels();
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friend class CLinePtr;
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LONG SetClientHeight(LONG yNewClientHeight);
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virtual void InitLinePtr ( CLinePtr & ) = 0;
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// Line break recalc.
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virtual BOOL RecalcView(BOOL fUpdateScrollBars, RECT* prc = NULL) = 0;
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// Rendering
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virtual void Render(const RECT &rcView, const RECT &rcRender) = 0;
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// Scrollbar
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virtual BOOL UpdateScrollBar(INT nBar, BOOL fUpdateRange = FALSE) = 0;
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void GetViewDim(LONG& widthView, LONG& heightView);
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void SetCpFirstVisible(LONG cp) {_cpFirstVisible = cp;};
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LONG ConvertScrollToXPos(LONG xPos);
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LONG ConvertXPosToScrollPos(LONG xPos);
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virtual LONG GetMaxXScroll() const = 0;
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public:
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virtual LONG ConvertYPosToScrollPos(LONG yPos);
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CDisplay (CTxtEdit* ped);
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virtual CDisplay::~CDisplay();
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virtual BOOL Init();
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void InitFromDisplay(const CDisplay *pdp);
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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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CTxtEdit* GetPed() const { return _ped;}
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CTxtStory* GetStory() const { return _ped->GetTxtStory();}
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const CDevDesc* GetDdRender() const { return this;}
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virtual const CDevDesc* GetDdTarget() const { return NULL; }
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const CDevDesc* GetTargetDev() const;
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virtual BOOL IsMain() const = 0;
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virtual BOOL IsPrinter() const;
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BOOL IsRecalcDone() const { return _fRecalcDone;}
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BOOL IsMultiLine() const { return _fMultiLine;}
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BOOL IsTransparent() const { return _ped->IsTransparent();}
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virtual BOOL GetWordWrap() const;
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void SetWordWrap(BOOL fNoWrap);
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HRESULT GetCachedSize(DWORD *pdwWidth, DWORD *pdwHeight);
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// maximum height and width
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virtual LONG GetMaxWidth() const = 0;
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virtual LONG GetMaxHeight() const = 0;
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virtual LONG GetMaxPixelWidth() const = 0;
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// Width, height and line count (all text)
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virtual LONG GetWidth() const = 0;
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virtual LONG GetHeight() const = 0;
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virtual LONG GetResizeHeight() const = 0;
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virtual LONG LineCount() const = 0;
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// View rectangle
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void GetViewRect(RECT &rcView, LPCRECT prcClient = NULL);
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LONG GetViewWidth() const { return _xWidthView;}
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LONG GetViewHeight() const { return _yHeightView;}
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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 = 0;
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LONG GetFirstVisibleCp() const {return _cpFirstVisible;};
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virtual LONG GetFirstVisibleLine() const = 0;
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// Line info
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virtual LONG GetLineText(LONG ili, TCHAR *pchBuff, LONG cchMost) = 0;
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virtual LONG CpFromLine(LONG ili, LONG *pyLine = NULL) = 0;
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virtual LONG LineFromCp(LONG cp, BOOL fAtEnd) = 0;
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// Point <-> cp conversion
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virtual LONG CpFromPoint(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) = 0;
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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) = 0;
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// View recalc and updating
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void SetUpdateCaret() {_fUpdateCaret = TRUE;}
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void SetViewChanged() {_fViewChanged = TRUE;}
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void InvalidateRecalc() {_fNeedRecalc = TRUE;}
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BOOL RecalcView (const RECT &rcView, RECT* prcClient = NULL);
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BOOL UpdateView();
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virtual BOOL UpdateView(const CRchTxtPtr &tpFirst, LONG cchOld, LONG cchNew) = 0;
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// Rendering
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HRESULT Draw(HDC hicTargetDev,
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HDC hdcDraw,
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LPCRECT prcClient,
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LPCRECT prcWBounds,
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LPCRECT prcUpdate,
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BOOL (CALLBACK * pfnContinue) (DWORD),
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DWORD dwContinue);
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// Background recalc
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virtual void StepBackgroundRecalc();
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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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// Scrolling
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LONG GetXScroll() const {return _xScroll;}
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virtual LONG GetYScroll() const {return 0;}
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void HScroll(WORD wCode, LONG xPos);
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virtual LRESULT VScroll(WORD wCode, LONG yPos);
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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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BOOL DragScroll(const POINT * ppt); // outside of client rect.
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BOOL AutoScroll( POINT pt, const WORD xScrollInset, const WORD yScrollInset );
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virtual BOOL ScrollView(LONG xScroll, LONG yScroll, BOOL fTracking, BOOL fFractionalScroll) = 0;
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virtual LONG AdjustToDisplayLastLine(LONG yBase, LONG yScroll);
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// Smooth Scrolling
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void SmoothVScroll ( int direction, WORD cLines, int speedNum, int speedDenom, BOOL fMouseRoller );
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void SmoothVScrollUpdate();
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BOOL CheckInstallSmoothVScroll();
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void CheckRemoveSmoothVScroll();
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void FinishSmoothVScroll();
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BOOL IsSmoothVScolling() { return _fSmoothVScroll; }
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// Scrollbars
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virtual LONG GetScrollRange(INT nBar) const;
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BOOL IsHScrollEnabled();
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BOOL IsVScrollEnabled() {return _fVScrollEnabled; }
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// Resizing
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void OnClientRectChange(const RECT &rcClient);
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void OnViewRectChange(const RECT &rcView);
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HRESULT RequestResize();
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// Selection
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virtual BOOL InvertRange(LONG cp,
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LONG cch,
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SELDISPLAYACTION selAction) = 0;
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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) = 0;
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LONG GetZoomDenominator() const;
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LONG GetZoomNumerator() const;
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LONG Zoom(LONG x) const;
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LONG UnZoom(LONG x) const;
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LONG HimetricXtoDX(LONG xHimetric) const;
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LONG HimetricYtoDY(LONG yHimetric) const;
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LONG DXtoHimetricX(LONG dx) const;
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LONG DYtoHimetricY(LONG dy) const;
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void ReDrawOnRectChange(HDC hicTarget, const RECT *prcClient);
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HRESULT TransparentHitTest(
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HDC hdc,
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LPCRECT prcClient,
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POINT pt,
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DWORD *pHitResult);
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HRESULT RoundToLine(HDC hdc, LONG width, LONG *pheight);
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void SetTempZoomDenominator(LONG lZoomDenominator)
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{
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_lTempZoomDenominator = lZoomDenominator;
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}
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LONG GetTempZoomDenominator()
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{
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return _lTempZoomDenominator;
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}
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void ResetTempZoomDenominator()
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{
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_lTempZoomDenominator = INVALID_ZOOM_DENOMINATOR;
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}
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void SetDrawInfo(
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CDrawInfo *pdi,
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DWORD dwDrawAspect, //@parm draw aspect
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LONG lindex, //@parm currently unused
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void *pvAspect, //@parm info for drawing optimizations (OCX 96)
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DVTARGETDEVICE *ptd,//@parm information on target device
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HDC hicTargetDev); //@parm target information context
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void ReleaseDrawInfo();
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void ResetDrawInfo(const CDisplay *pdp);
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DWORD GetDrawAspect() const;
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LONG GetLindex() const;
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void * GetAspect() const;
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DVTARGETDEVICE *GetPtd() const;
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void SetActiveFlag(BOOL fActive) { _fActive = fActive; }
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BOOL IsActive() { return _fActive; }
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virtual CDisplay *Clone() const = 0;
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// Support for freezing the display
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BOOL IsFrozen();
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void SaveUpdateCaret(BOOL fScrollIntoView);
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void Freeze();
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void SetNeedRedisplayOnThaw(BOOL fNeedRedisplay);
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void Thaw();
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//
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// ITxNotify Interface
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//
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virtual void OnPreReplaceRange(
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LONG cp,
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LONG cchDel,
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LONG cchNew,
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LONG cpFormatMin, LONG cpFormatMax);
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virtual void OnPostReplaceRange(
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LONG cp,
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LONG cchDel,
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LONG cchNew,
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LONG cpFormatMin,
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LONG cpFormatMax);
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virtual void Zombie();
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};
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// Defines the draw info class. It is included here to prevent loops
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// in dependencies that would require no inlining for functions dealing
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// with this
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#include "_drwinfo.h"
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/*
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* CDisplay::ResetDrawInfo
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*
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* @mfunc Sets draw info using different display
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*
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* @rdesc void
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*
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*/
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inline void CDisplay::ResetDrawInfo(
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const CDisplay *pdp) //@parm Display to use for draw information
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{
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_pdi = pdp->_pdi;
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}
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/*
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* CDisplay::ResetDrawInfo
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*
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* @mfunc Gets lindex as passed most recently from the host.
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*
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* @rdesc draw aspect
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*
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*/
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inline DWORD CDisplay::GetDrawAspect() const
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{
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return _pdi ? _pdi->GetDrawAspect() : DVASPECT_CONTENT;
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}
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/*
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* CDisplay::GetLindex
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*
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* @mfunc Gets lindex as passed most recently from the host.
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*
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* @rdesc lindex
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*
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*/
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inline LONG CDisplay::GetLindex() const
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{
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return _pdi ? _pdi->GetLindex() : -1;
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}
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/*
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* CDisplay::GetAspect
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*
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* @mfunc Gets aspect as passed most recently from the host.
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*
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* @rdesc Aspect data
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*
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*/
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inline void *CDisplay::GetAspect() const
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{
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return _pdi ? _pdi->GetAspect() : NULL;
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}
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/*
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* CDisplay::GetPtd
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*
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* @mfunc Gets device target as passed most recently from the host.
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*
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* @rdesc DVTARGETDEVICE or NULL
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*
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*/
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inline DVTARGETDEVICE *CDisplay::GetPtd() const
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{
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return _pdi ? _pdi->GetPtd() : NULL;
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}
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/*
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* CDisplay::IsFrozen
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*
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* @mfunc Return whether display is currently frozen
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*
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* @rdesc
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* TRUE - display is frozen <nl>
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* FALSE - display is not frozen
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*
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*/
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inline BOOL CDisplay::IsFrozen()
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{
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return _padc != NULL;
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}
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/*
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* CFreezeDisplay
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*
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* @class This class is used to freeze and guranatee that the display
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* unfreeze a display when it passes out of its context.
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*
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*
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*/
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class CFreezeDisplay
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{
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public:
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CFreezeDisplay(CDisplay *pdp); //@cmember Constructor Freezes
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~CFreezeDisplay(); //@cmember Destructor - Thaws
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private:
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CDisplay * _pdp; //@cmember Display to freeze
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};
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/*
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* CFreezeDisplay::CFreezeDisplay()
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*
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* @mfunc
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* Initialize object and tell the input display to freeze
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*/
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inline CFreezeDisplay::CFreezeDisplay(CDisplay *pdp) : _pdp(pdp)
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{
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pdp->Freeze();
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}
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/*
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* CFreezeDisplay::CFreezeDisplay()
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*
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* @mfunc
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* Free object and tell display to thaw.
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*/
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inline CFreezeDisplay::~CFreezeDisplay()
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{
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_pdp->Thaw();
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}
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#endif
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