editor.h

porting scintilla to qt

// Scintilla source code edit control
/** @file Editor.h
 ** Defines the main editor class.
 **/
// Copyright 1998-2003 by Neil Hodgson <[e-mail]>
// The License.txt file describes the conditions under which this software may be distributed.

#ifndef EDITOR_H
#define EDITOR_H
#include "constants.h"
#ifdef SCI_NAMESPACE
namespace Scintilla {
#endif
#include "PositionCache.h"
/**
 */
class Caret {
public:
	bool active;
	bool on;
	int period;

	Caret();
};

/**
 */
class Timer {
public:
	bool ticking;
	int ticksToWait;
	enum {tickSize = 100};
	TickerID tickerID;

	Timer();
};

/**
 */
class Idler {
public:
	bool state;
	IdlerID idlerID;

	Idler();
};

/**
 * Hold a piece of text selected for copying or dragging.
 * The text is expected to hold a terminating '\0' and this is counted in len.
 */
class SelectionText {
public:
	char *s;
	int len;
	bool rectangular;
	bool lineCopy;
	int codePage;
	int characterSet;
	SelectionText() : s(0), len(0), rectangular(false), lineCopy(false), codePage(0), characterSet(0) {}
	~SelectionText() {
		Free();
	}
	void Free() {
		Set(0, 0, 0, 0, false, false);
	}
	void Set(char *s_, int len_, int codePage_, int characterSet_, bool rectangular_, bool lineCopy_) {
		delete []s;
		s = s_;
		if (s)
			len = len_;
		else
			len = 0;
		codePage = codePage_;
		characterSet = characterSet_;
		rectangular = rectangular_;
		lineCopy = lineCopy_;
	}
	void Copy(const char *s_, int len_, int codePage_, int characterSet_, bool rectangular_, bool lineCopy_) {
		delete []s;
		s = new char[len_];
		if (s) {
			len = len_;
			for (int i = 0; i < len_; i++) {
				s[i] = s_[i];
			}
		} else {
			len = 0;
		}
		codePage = codePage_;
		characterSet = characterSet_;
		rectangular = rectangular_;
		lineCopy = lineCopy_;
	}
	void Copy(const SelectionText &other) {
		Copy(other.s, other.len, other.codePage, other.characterSet, other.rectangular, other.lineCopy);
	}
};

/**
 */
class _QSTE_DLL_ Editor : public DocWatcher {
	// Private so Editor objects can not be copied
	Editor(const Editor &) : DocWatcher() {}
	Editor &operator=(const Editor &) { return *this; }

protected:	// ScintillaBase subclass needs access to much of Editor

	/** On GTK+, Scintilla is a container widget holding two scroll bars
	 * whereas on Windows there is just one window with both scroll bars turned on. */
	Window wMain;	///< The Scintilla parent window

	/** Style resources may be expensive to allocate so are cached between uses.
	 * When a style attribute is changed, this cache is flushed. */
	bool stylesValid;
	ViewStyle vs;
	Palette palette;

	int printMagnification;
	int printColourMode;
	int printWrapState;
	int cursorMode;
	int controlCharSymbol;

	bool hasFocus;
	bool hideSelection;
	bool inOverstrike;
	int errorStatus;
	bool mouseDownCaptures;

	/** In bufferedDraw mode, graphics operations are drawn to a pixmap and then copied to
	 * the screen. This avoids flashing but is about 30% slower. */
	bool bufferedDraw;
	/** In twoPhaseDraw mode, drawing is performed in two phases, first the background
	* and then the foreground. This avoids chopping off characters that overlap the next run. */
	bool twoPhaseDraw;

	int xOffset;		///< Horizontal scrolled amount in pixels
	int xCaretMargin;	///< Ensure this many pixels visible on both sides of caret
	bool horizontalScrollBarVisible;
	int scrollWidth;
	bool trackLineWidth;
	int lineWidthMaxSeen;
	bool verticalScrollBarVisible;
	bool endAtLastLine;
	bool caretSticky;

	Surface *pixmapLine;
	Surface *pixmapSelMargin;
	Surface *pixmapSelPattern;
	Surface *pixmapIndentGuide;
	Surface *pixmapIndentGuideHighlight;

	LineLayoutCache llc;
	PositionCache posCache;

	KeyMap kmap;

	Caret caret;
	Timer timer;
	Timer autoScrollTimer;
	enum { autoScrollDelay = 200 };

	Idler idler;

	Point lastClick;
	unsigned int lastClickTime;
	int dwellDelay;
	int ticksToDwell;
	bool dwelling;
	enum { selChar, selWord, selLine } selectionType;
	Point ptMouseLast;
	enum { ddNone, ddInitial, ddDragging } inDragDrop;
	bool dropWentOutside;
	int posDrag;
	int posDrop;
	int lastXChosen;
	int lineAnchor;
	int originalAnchorPos;
	int currentPos;
	int anchor;
	int targetStart;
	int targetEnd;
	int searchFlags;
	int topLine;
	int posTopLine;
	int lengthForEncode;

	bool needUpdateUI;
	Position braces[2];
	int bracesMatchStyle;
	int highlightGuideColumn;

	int theEdge;

	enum { notPainting, painting, paintAbandoned } paintState;
	PRectangle rcPaint;
	bool paintingAllText;

	int modEventMask;

	SelectionText drag;
	enum selTypes { noSel, selStream, selRectangle, selLines };
	selTypes selType;
	bool moveExtendsSelection;
	int xStartSelect;	///< x position of start of rectangular selection
	int xEndSelect;		///< x position of end of rectangular selection
	bool primarySelection;

	int caretXPolicy;
	int caretXSlop;	///< Ensure this many pixels visible on both sides of caret

	int caretYPolicy;
	int caretYSlop;	///< Ensure this many lines visible on both sides of caret

	int visiblePolicy;
	int visibleSlop;

	int searchAnchor;

	bool recordingMacro;

	int foldFlags;
	ContractionState cs;

	// Hotspot support
	int hsStart;
	int hsEnd;

	// Wrapping support
	enum { eWrapNone, eWrapWord, eWrapChar } wrapState;
	enum { wrapLineLarge = 0x7ffffff };
	int wrapWidth;
	int wrapStart;
	int wrapEnd;
	int wrapVisualFlags;
	int wrapVisualFlagsLocation;
	int wrapVisualStartIndent;
	int actualWrapVisualStartIndent;

	bool convertPastes;

	Document *pdoc;

	Editor();
	virtual ~Editor();
	virtual void Initialise() = 0;
	virtual void Finalise();

	void InvalidateStyleData();
	void InvalidateStyleRedraw();
	virtual void RefreshColourPalette(Palette &pal, bool want);
	void RefreshStyleData();
	void DropGraphics();

	virtual PRectangle GetClientRectangle();
	PRectangle GetTextRectangle();

	int LinesOnScreen();
	int LinesToScroll();
	int MaxScrollPos();
	Point LocationFromPosition(int pos);