xref: /xsrc/external/mit/libXaw/dist/include/X11/Xaw/TextSink.h

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Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
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******************************************************************/

#ifndef _XawTextSink_h
#define _XawTextSink_h

#include <X11/Xaw/Text.h>

/***********************************************************************
 *
 * TextSink Object
 *
 ***********************************************************************/

/* Resources:

 Name		     Class		RepType		Default Value
 ----		     -----		-------		-------------
 font                Font            XFontStruct *      XtDefaultFont
 foreground          Foreground      Pixel              XtDefaultForeground
 background          Background      Pixel              XtDefaultBackground
 cursorColor	     Color	      Pixel		XtDefaultForeground
*/

/* Class record constants */

extern WidgetClass textSinkObjectClass;

typedef struct _TextSinkClassRec *TextSinkObjectClass;
typedef struct _TextSinkRec      *TextSinkObject;

typedef enum {XawisOn, XawisOff} XawTextInsertState;

#ifndef OLDXAW
#ifndef XtNcursorColor
#define XtNcursorColor		"cursorColor"
#endif

#define XawNtextProperties	"textProperties"
#define XawCTextProperties	"TextProperties"
#define XawRTextProperties	"XawTextProperties"
#endif

/*
 * Public Functions
 */
_XFUNCPROTOBEGIN

/*
 * Function:
 *	XawTextSinkDisplayText
 *
 * Parameters:
 *	w	  - the TextSink Object
 *	x	  - location to start drawing text
 *	y	  - ""
 *	pos1	  - location of starting and ending points in the text buffer
 *	pos2	  - ""
 *	highlight - highlight this text?
 *
 * Description:
 *	Stub function that in subclasses will display text.
 *
 * Note:
 *	  This function doesn't actually display anything, it is only a place
 *	holder.
 */
void XawTextSinkDisplayText
(
 Widget			w,
#if NeedWidePrototypes
 int			x,
 int			y,
#else
 Position		x,
 Position		y,
#endif
 XawTextPosition	pos1,
 XawTextPosition	pos2,
#if NeedWidePrototypes
 int			highlight
#else
 Boolean		highlight
#endif
 );

/*
 * Function:
 *	XawTextSinkInsertCursor
 *
 * Parameters:
 *	w	- the TextSink Object.
 *	x	- location for the cursor.
 *	y	- ""
 *	state	- whether to turn the cursor on, or off
 *
 * Description:
 *	Places the InsertCursor.
 *
 * Note:
 *	  This function doesn't actually display anything, it is only a place
 *	holder.
 */
void XawTextSinkInsertCursor
(
 Widget			w,
#if NeedWidePrototypes
 int			x,
 int			y,
 int			state
#else
 Position		x,
 Position		y,
 XawTextInsertState	state
#endif
 );

/*
 * Function:
 *	XawTextSinkClearToBackground
 *
 * Parameters:
 *	w	- TextSink Object
 *	x	- location of area to clear
 *	y	- ""
 *	width	- size of area to clear
 *	height	- ""
 *
 * Description:
 *	Clears a region of the sink to the background color.
 *
 * Note:
 *	  This function doesn't actually display anything, it is only a place
 *	holder.
 */
void XawTextSinkClearToBackground
(
 Widget			w,
#if NeedWidePrototypes
 int			x,
 int			y,
 unsigned int		width,
 unsigned int		height
#else
 Position		x,
 Position		y,
 Dimension		width,
 Dimension		height
#endif
 );

/*
 * Function:
 *	XawTextSinkFindPosition
 *
 * Parameters:
 *	w		- TextSink Object
 *	fromPos		- reference position
 *	fromX		- reference location
 *	width		- width of section to paint text
 *	stopAtWordBreak - returned position is a word break?
 *	resPos		- Position to return
 *	resWidth	- Width actually used
 *	resHeight	- Height actually used
 *
 * Description:
 *	Finds a position in the text.
 */
void XawTextSinkFindPosition
(
 Widget			w,
 XawTextPosition	fromPos,
 int			fromX,
 int			width,
#if NeedWidePrototypes
 int			stopAtWordBreak,
#else
 Boolean		stopAtWordBreak,
#endif
 XawTextPosition*	pos_return,
 int			*width_return,
 int			*height_return
 );

/*
 * Function:
 *	XawTextSinkFindDistance
 *
 * Parameters:
 *	w		- TextSink Object
 *	fromPos		- starting Position
 *	fromX		- x location of starting Position
 *	toPos		- end Position
 *	resWidth	- Distance between fromPos and toPos
 *	resPos		- Actual toPos used
 *	resHeight	- Height required by this text
 *
 * Description:
 *	Find the Pixel Distance between two text Positions.
 */
void XawTextSinkFindDistance
(
 Widget			w,
 XawTextPosition	fromPos,
 int			fromX,
 XawTextPosition	toPos,
 int			*width_return,
 XawTextPosition	*pos_return,
 int			*height_return
 );

/*
 * Function:
 *	XawTextSinkResolve
 *
 * Parameters:
 *	w	- TextSink Object
 *	pos	- reference Position
 *	fromx	- reference Location
 *	width	- width to move
 *	resPos	- resulting position
 *
 * Description:
 *	Resolves a location to a position.
 */
void XawTextSinkResolve
(
 Widget			w,
 XawTextPosition	fromPos,
 int			fromX,
 int			width,
 XawTextPosition	*pos_return
 );

/*
 * Function:
 *	XawTextSinkMaxLines
 *
 * Parameters:
 *	w	- TextSink Object
 *	height	- height to fit lines into
 *
 * Returns:
 *	Number of lines that will fit
 *
 * Description:
 *	Finds the Maximum number of lines that will fit in a given height.
 */
int XawTextSinkMaxLines
(
 Widget			w,
#if NeedWidePrototypes
 unsigned int		height
#else
 Dimension		height
#endif
 );

/*
 * Function:
 *	XawTextSinkMaxHeight
 *
 * Parameters:
 *	w	- TextSink Object
 *	lines	- number of lines
 *
 * Returns:
 *	Height
 *
 * Description:
 *	Finds the Minimum height that will contain a given number lines.
 */
int XawTextSinkMaxHeight
(
 Widget			w,
 int			lines
);

/*
 * Function:
 *	XawTextSinkSetTabs
 *
 * Parameters:
 *	w		- TextSink Object
 *	tab_count	- number of tabs in the list
 *	tabs		- text positions of the tabs
 * Description:
 *	Sets the Tab stops.
 */
void XawTextSinkSetTabs
(
 Widget			w,
 int			tab_count,
 int			*tabs
);

/*
 * Function:
 *	XawTextSinkGetCursorBounds
 *
 * Parameters:
 *	w	- TextSink Object
 *	rect	- X rectance containing the cursor bounds
 * Description:
 *	Finds the bounding box for the insert curor (caret).
 */
void XawTextSinkGetCursorBounds
(
 Widget			w,
 XRectangle		*rect_return
);

_XFUNCPROTOEND

#endif /* _XawTextSink_h */