WebSVN – Kolibri OS – Blame – /contrib/media/updf/include/commandline.h

Rev	Author	Line No.	Line
4680	right-hear	1
		2	* Implementation of a platform-independent command line with history.
		3	*
		4	* The class CCommandLine has two roles:
		5	* 1) It has an outside interface, ReadLine(), that yields to the
		6	* system until the user is finished entering an expression at
		7	* the command line. The result can be found in iLine.
		8	* 2) It defines a mini-API needed to implement the command line.
		9	* For each platform Yacas is meant to run on there should be a
		10	* CCommandLine-derived class if this functionality is to be used.
		11	*
		12	*/
		13
		14
		15	#define __commandline_h__
		16
		17
		18	#include "yacasbase.h"
		19
		20
		21	{
		22	eDelete = 0x1000,
		23	eBackSpace,
		24	eLeft,
		25	eRight,
		26	eUp,
		27	eDown,
		28	eHome,
		29	eEnd,
		30	eEnter,
		31	eTab,
		32	eEscape
		33	};
		34
		35
		36	* Implementation of a platform-independent command line with history.
		37	*
		38	* The class CCommandLine has two roles:
		39	* 1) It has an outside interface, ReadLine(), that yields to the
		40	* system until the user is finished entering an expression at
		41	* the command line. The result can be found in iLine.
		42	* 2) It defines a mini-API needed to implement the command line.
		43	* For each platform Yacas is meant to run on there should be a
		44	* CCommandLine-derived class if this functionality is to be used.
		45	*
		46	* The derived class is responsible for filling the history list,
		47	* and for externalizing the history list to disk when the system
		48	* shuts down.
		49	*/
		50
		51
		52	class CConsoleHistory
		53	{
		54	public:
		55	CConsoleHistory() : iHistory(),history(0) {}
		56	void ResetHistoryPosition();
		57	void AddLine(LispString& aString);
		58	void Append(LispString * aString);
		59	LispInt ArrowUp(LispString& aString,LispInt &aCursorPos);
		60	LispInt ArrowDown(LispString& aString,LispInt &aCursorPos);
		61	LispInt Complete(LispString& aString,LispInt &aCursorPos);
		62	LispInt NrLines();
		63	LispString * GetLine(LispInt aLine);
		64	protected:
		65	CDeletingArrayGrower > iHistory;
		66	LispInt history;
		67	};
		68
		69
		70	{
		71	public:
		72	CCommandLine() : iFullLineDirty(LispFalse),iHistoryUnchanged(0),iLine(),iSubLine(),iHistoryList() {};
		73	virtual ~CCommandLine();
		74	/// Call this function if the user needs to enter an expression.
		75	virtual void ReadLine(LispChar * prompt);
		76	public: //platform stuff
		77	/** return a key press, which is either an ascii value, or one
		78	* of the values specified in ESpecialChars
		79	*/
		80	virtual LispInt GetKey() = 0;
		81	/// Go to the next line on the console (carriage return/line feed).
		82	virtual void NewLine() = 0;
		83	/** Show the current line (in iSubLine), with the required prompt,
		84	* and the cursor position at cursor (starting from the prompt).
		85	*/
		86	virtual void ShowLine(LispChar * prompt,
		87	LispInt promptlen,LispInt cursor) = 0;
		88	/// Pause for a short while. Used when matching brackets.
		89	virtual void Pause() = 0;
		90
		91
		92	virtual void MaxHistoryLinesSaved(LispInt aNrLines);
		93
		94
		95	virtual void ReadLineSub(LispChar * prompt);
		96	private:
		97	void GetHistory(LispInt aLine);
		98	void ShowOpen(LispChar * prompt,LispInt promptlen,
		99	LispChar aOpen, LispChar aClose, LispInt aCurPos);
		100	protected:
		101	LispInt iFullLineDirty;
		102	LispInt iHistoryUnchanged;
		103
		104
		105	LispString iLine;
		106	LispString iSubLine;
		107
		108
		109	};
		110
		111
		112

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(root)/contrib/media/updf/include/commandline.h – Rev 7621