text_object.c File Reference

A 'C++'-like object for managing text, that can be overridden for custom behavior. More...

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <memory.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
#include <limits.h>
#include "draw_text.h"
#include "text_object.h"
#include "conf_help.h"

Go to the source code of this file.

Data Structures
struct	s_internal_undo_redo_buffer
	Internal-only structure for undo/redo buffer for text object. More...

Macros
#define	SEL_RECT_ALL(X)   ((X)->rctSel.left < 0)
#define	SEL_RECT_EMPTY(X)   (!SEL_RECT_ALL(X) && ((X)->rctSel.left == (X)->rctSel.right && (X)->rctSel.bottom == (X)->rctSel.top))
#define	NORMALIZE_SEL_RECT(X)
#define	CURSOR_BLINK_RESET   0 /* shows blinking cursor for max time */
#define	CURSOR_BLINK_PERIOD   3
#define	CURSOR_BLINK_OFF   (CURSOR_BLINK_PERIOD - 1)
#define	DEFAULT_TEXT_BUFFER_LINES   16384
#define	UNDO_LIMIT   256
#define	COPY_COLOR_NAME(X, Y, Z)   {const char *pX = X(WBGetDefaultDisplay()); if(pX) strncpy(Y,pX,sizeof(Y)); else strncpy(Y,Z,sizeof(Y));}

Typedefs
typedef enum e_undo_operation	UNDO_OPERATION
	Internal-only enumeration for undo/redo buffer 'iOperation' member.

Enumerations
enum	e_undo_operation {   UNDO_NONE =-1,   UNDO_SELECT =0,   UNDO_DELETE =1,   UNDO_INSERT =2,   UNDO_REPLACE =3,   UNDO_INDENT =4,   UNDO_LAST =4 }
	Internal-only enumeration for undo/redo buffer 'iOperation' member. More...

Functions
static void	__internal_destroy (TEXT_OBJECT *pThis)
static void	__internal_init (TEXT_OBJECT *pThis)
static void	__internal_highlight_colors (TEXT_OBJECT *pThis, XColor clrHFG, XColor clrHBG)
static char *	__internal_get_text (TEXT_OBJECT *pThis)
static void	__internal_set_text (TEXT_OBJECT *pThis, const char *szText, unsigned long cbLen)
static int	__internal_get_rows (const TEXT_OBJECT *pThis)
static int	__internal_get_cols (TEXT_OBJECT *pThis)
static int	__internal_get_filetype (const TEXT_OBJECT *pThis)
static void	__internal_set_filetype (TEXT_OBJECT *pThis, int iFileType)
static int	__internal_get_linefeed (const TEXT_OBJECT *pThis)
static void	__internal_set_linefeed (TEXT_OBJECT *pThis, int iLineFeed)
static int	__internal_get_insmode (const TEXT_OBJECT *pThis)
static void	__internal_set_insmode (TEXT_OBJECT *pThis, int iInsMode)
static int	__internal_get_selmode (const TEXT_OBJECT *pThis)
static void	__internal_set_selmode (TEXT_OBJECT *pThis, int iSelMode)
static int	__internal_get_tab (const TEXT_OBJECT *pThis)
static void	__internal_set_tab (TEXT_OBJECT *pThis, int iTab)
static int	__internal_get_scrollmode (const TEXT_OBJECT *pThis)
static void	__internal_set_scrollmode (TEXT_OBJECT *pThis, int iScrollMode)
static void	__internal_get_select (const TEXT_OBJECT *pThis, WB_RECT *pRct)
static void	__internal_set_select (TEXT_OBJECT *pThis, const WB_RECT *pRct)
static int	__internal_has_select (const TEXT_OBJECT *pThis)
static char *	__internal_get_sel_text (const TEXT_OBJECT *pThis, const WB_RECT *pRct)
static int	__internal_get_row (const TEXT_OBJECT *pThis)
static void	__internal_set_row (TEXT_OBJECT *pThis, int iRow)
static int	__internal_get_col (const TEXT_OBJECT *pThis)
static void	__internal_set_col (TEXT_OBJECT *pThis, int iCol)
static void	__internal_del_select (TEXT_OBJECT *pThis)
static void	__internal_replace_select (TEXT_OBJECT *pThis, const char *szText, unsigned long cbLen)
static void	__internal_del_chars (TEXT_OBJECT *pThis, int nChar)
static void	__internal_ins_chars (TEXT_OBJECT *pThis, const char *pChar, int nChar)
static void	__internal_indent (TEXT_OBJECT *pThis, int nCol)
static int	__internal_can_undo (TEXT_OBJECT *pThis)
static void	__internal_undo (TEXT_OBJECT *pThis)
static int	__internal_can_redo (TEXT_OBJECT *pThis)
static void	__internal_redo (TEXT_OBJECT *pThis)
static void	__internal_get_view (const TEXT_OBJECT *pThis, WB_RECT *pRct)
static void	__internal_set_view_origin (TEXT_OBJECT *pThis, const WB_POINT *pOrig)
static void	__internal_begin_highlight (TEXT_OBJECT *pThis)
static void	__internal_end_highlight (TEXT_OBJECT *pThis)
static void	__internal_mouse_click (TEXT_OBJECT *pThis, int iMouseXDelta, int iMouseYDelta, int iType, int iACS)
static void	__internal_begin_mouse_drag (TEXT_OBJECT *pThis)
static void	__internal_end_mouse_drag (TEXT_OBJECT *pThis)
static void	__internal_cursor_up (TEXT_OBJECT *pThis)
static void	__internal_cursor_down (TEXT_OBJECT *pThis)
static void	__internal_cursor_left (TEXT_OBJECT *pThis)
static void	__internal_cursor_right (TEXT_OBJECT *pThis)
static void	__internal_page_up (TEXT_OBJECT *pThis)
static void	__internal_page_down (TEXT_OBJECT *pThis)
static void	__internal_page_left (TEXT_OBJECT *pThis)
static void	__internal_page_right (TEXT_OBJECT *pThis)
static void	__internal_cursor_home (TEXT_OBJECT *pThis)
static void	__internal_cursor_end (TEXT_OBJECT *pThis)
static void	__internal_cursor_top (TEXT_OBJECT *pThis)
static void	__internal_cursor_bottom (TEXT_OBJECT *pThis)
static void	__internal_scroll_vertical (TEXT_OBJECT *pThis, int nRows)
static void	__internal_scroll_horizontal (TEXT_OBJECT *pThis, int nCols)
static void	__internal_do_expose (TEXT_OBJECT *pThis, Display *pDisplay, Window wID, WBGC gc, const WB_GEOM *pPaintGeom, const WB_GEOM *pViewGeom, WB_FONTC pFont)
static void	__internal_cursor_blink (TEXT_OBJECT *pThis, int bHasFocus)
static int	__internal_cursor_show (int iBlinkState)
static void	__internal_set_save_point (TEXT_OBJECT *pThis)
static int	__internal_get_modified (TEXT_OBJECT *pThis)
static __inline__ const char *	__internal_get_line_ending_text (enum e_LineFeed iIndex)
TEXT_BUFFER *	WBAllocTextBuffer (const char *pBuf, unsigned int cbBufSize)
	Generic constructor for a TEXT_BUFFER using defaults. More...
int	WBCheckReAllocTextBuffer (TEXT_BUFFER **ppBuf, int nLinesToAdd)
	Re-allocator for TEXT_BUFFER object. More...
void	WBFreeTextBuffer (TEXT_BUFFER *pBuf)
	Re-allocator for TEXT_BUFFER object, returns ZERO on success. Pointer may be modified (or not). More...
int	WBTextBufferLineLength (TEXT_BUFFER *pBuf, unsigned long nLine)
	Text buffer 'cached information' query function indicating a line's cached length. More...
void	WBTextBufferLineChange (TEXT_BUFFER *pBuf, unsigned long nLine, int nNewLen)
	Text buffer 'cached information' update function indicating a change to a line's length. More...
void	WBTextBufferRefreshCache (TEXT_BUFFER *pBuf)
	Text buffer 'cached information' refresh function. More...
TEXT_OBJECT *	WBTextObjectConstructor (unsigned long cbStructSize, const char *szText, unsigned long cbLen, Window wIDOwner)
	Generic constructor for a TEXT_OBJECT using defaults. More...
void	WBTextObjectDestructor (TEXT_OBJECT *pObj)
	Generic detructor for a TEXT_OBJECT. More...
int	WBTextObjectCalculateLineHeight (int iAscent, int iDescent)
	Calculate the correct per-line height (in pixels) for a specified font ascent and descent. More...
void	WBTextObjectSetColorContextCallback (TEXT_OBJECT *pThis, unsigned long(*callback)(TEXT_OBJECT *pThis, int nX, int nY), void *pColorContextPointer)
static void	__internal_free_undo_redo_buffer (void *pBuffer)
static void	__internal_add_undo (TEXT_OBJECT *pThis, int iOperation, int iSelMode, int iStartRow, int iStartCol, const WB_RECT *prctStartSel, const char *pStartText, int cbStartText, int iEndRow, int iEndCol, const WB_RECT *prctEndSel, const char *pEndText, int cbEndText)
static char *	__internal_get_selected_text (const TEXT_OBJECT *pThis, int iRow, int iCol, int iEndRow, int iEndCol)
static void	__internal_invalidate_cursor (const TEXT_OBJECT *pThis, int bPaintFlag)
static void	__internal_invalidate_rect (TEXT_OBJECT *pThis, WB_RECT *pRect, int bPaintFlag)
static void	__internal_calc_rect (const TEXT_OBJECT *pThis, WB_RECT *pRect, int iStartRow, int iStartCol, int iEndRow, int iEndCol)
static void	__internal_merge_rect (const TEXT_OBJECT *pThis, WB_RECT *pRect, int iStartRow, int iStartCol, int iEndRow, int iEndCol)
static int	internal_IsMBCharValid (const char *pChar, int *piLen)
static int	internal_MBstrlen (const char *pString)
static int	internal_MBColIndex (const char *pString, int iCol)
char *	WBInsertMBChars (char *pString, int iCol, const char *pszMBString, int cbString, int fTab, int fOverwrite, int *piNewCol, char **ppInserted)
	Insert multi-byte characters into a WBAlloc'd string, at a specified column. More...
char *	WBSplitMBLine (char *pString, int iCol)
	Split a multi-byte characters into a WBAlloc'd string, at a specified column, terminating the original string at that column with a zero byte. More...
char *	WBJoinMBLine (char *pString, int iCol, const char *pJoin)
	Split a multi-byte characters into a WBAlloc'd string, at a specified column, terminating the original string at that column with a zero byte. More...
int	WBDelMBChars (char *pString, int iCol, int nDel, int *piNewCol, char **ppDeleted)
	Delete a specified number of multi-byte characters from a string 'in place', starting at a specified column. More...
int	WBGetMBLength (const char *pString)
	Obtain the length of a multi-byte character string in 'characters' (not bytes) More...
char *	WBGetMBCharPtr (char *pString, int iCol, int *pcbLen)
	Obtain the pointer to a specific multi-byte character within a multi-byte character string, by specifying it's column. More...
int	WBGetMBColIndex (const char *pString, const char *pChar)
	Obtain the column index from a pointer within a multi-byte character string. More...

Variables
const TEXT_OBJECT_VTABLE	WBDefaultTextObjectVTable

Detailed Description

A 'C++'-like object for managing text, that can be overridden for custom behavior.

X11workbench Toolkit API 'text object' for copying and drawing text, determining text extents for rendering, managing edits and undo for a block of text, and so on. In short it encapsulates the core functionality for managing a block of editable and/or viewable text.

Definition in file text_object.c.

Macro Definition Documentation

NORMALIZE_SEL_RECT

#define NORMALIZE_SEL_RECT

(

X

)

Value:

{if(( (X).top > (X).bottom ) || ( (X).top == (X).bottom && (X).left > (X).right) ) \
                               { int i1 = (X).left; (X).left = (X).right; (X).right = i1; \
                                 i1 = (X).top; (X).top = (X).bottom; (X).bottom = i1; }}

Definition at line 121 of file text_object.c.

Enumeration Type Documentation

e_undo_operation

enum e_undo_operation

Internal-only enumeration for undo/redo buffer 'iOperation' member.

Definition at line 101 of file text_object.c.

Function Documentation

__internal_do_expose()

static void __internal_do_expose ( TEXT_OBJECT *  pThis, Display *  pDisplay, Window  wID, WBGC  gc, const WB_GEOM *  pPaintGeom, const WB_GEOM *  pViewGeom, WB_FONTC  pFont  )

static

memcmp(&pThis->clrHFG, &pThis->clrHBG, sizeof(XColor)))

Definition at line 5557 of file text_object.c.