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/*******************************************************************************
* *
* textBuf.h - Manage source text for one or more text areas *
* *
* Copyright (c) 1991 Universities Research Association, Inc. *
* All rights reserved. *
* *
* This material resulted from work developed under a Government Contract and *
* is subject to the following license: The Government retains a paid-up, *
* nonexclusive, irrevocable worldwide license to reproduce, prepare derivative *
* works, perform publicly and display publicly by or for the Government, *
* including the right to distribute to other Government contractors. Neither *
* the United States nor the United States Department of Energy, nor any of *
* their employees, makes any warranty, express or implied, or assumes any *
* legal liability or responsibility for the accuracy, completeness, or *
* usefulness of any information, apparatus, product, or process disclosed, or *
* represents that its use would not infringe privately owned rights. *
* *
* Fermilab Nirvana GUI Library *
* June 15, 1995 *
* *
* Written by Mark Edel *
* *
*******************************************************************************/
/* Maximum length in characters of a tab or control character expansion
of a single buffer character */
#define MAX_EXP_CHAR_LEN 20
typedef struct {
char selected;
char rectangular;
int start;
int end;
int rectStart;
int rectEnd;
} selection;
typedef void (*bufModifyCallbackProc)(int pos, int nInserted, int nDeleted,
int nRestyled, char *deletedText, void *cbArg);
typedef struct _textBuffer {
int length; /* length of the text in the buffer (the length
of the buffer itself must be calculated:
gapEnd - gapStart + length) */
char *buf; /* allocated memory where the text is stored */
int gapStart; /* points to the first character of the gap */
int gapEnd; /* points to the first char after the gap */
selection primary; /* highlighted areas */
selection secondary;
selection highlight;
int tabDist; /* equiv. number of characters in a tab */
int useTabs; /* True if buffer routines are allowed to use
tabs for padding in rectangular operations */
int nModifyProcs; /* number of modify-redisplay procs attached */
bufModifyCallbackProc /* procedures to call when buffer is */
*modifyProcs; /* modified to redisplay contents */
void **cbArgs; /* caller arguments for modifyProcs above */
int cursorPosHint; /* hint for reasonable cursor position after
a buffer modification operation */
char nullSubsChar; /* NEdit is based on C null-terminated strings,
so ascii-nul characters must be substituted
with something else. This is the else, but
of course, things get quite messy when you
use it */
} textBuffer;
textBuffer *BufCreate(void);
textBuffer *BufCreatePreallocated(int requestedSize);
void BufFree(textBuffer *buf);
char *BufGetAll(textBuffer *buf);
void BufSetAll(textBuffer *buf, char *text);
char *BufGetRange(textBuffer *buf, int start, int end);
char BufGetCharacter(textBuffer *buf, int pos);
char *BufGetTextInRect(textBuffer *buf, int start, int end,
int rectStart, int rectEnd);
void BufInsert(textBuffer *buf, int pos, char *text);
void BufRemove(textBuffer *buf, int start, int end);
void BufReplace(textBuffer *buf, int start, int end, char *text);
void BufCopyFromBuf(textBuffer *fromBuf, textBuffer *toBuf, int fromStart,
int fromEnd, int toPos);
void BufInsertCol(textBuffer *buf, int column, int startPos, char *text,
int *charsInserted, int *charsDeleted);
void BufReplaceRect(textBuffer *buf, int start, int end, int rectStart,
int rectEnd, char *text);
void BufRemoveRect(textBuffer *buf, int start, int end, int rectStart,
int rectEnd);
void BufOverlayRect(textBuffer *buf, int startPos, int rectStart,
int rectEnd, char *text, int *charsInserted, int *charsDeleted);
void BufClearRect(textBuffer *buf, int start, int end, int rectStart,
int rectEnd);
int BufGetTabDistance(textBuffer *buf);
void BufSetTabDistance(textBuffer *buf, int tabDist);
void BufSelect(textBuffer *buf, int start, int end);
void BufUnselect(textBuffer *buf);
void BufRectSelect(textBuffer *buf, int start, int end, int rectStart,
int rectEnd);
int BufGetSelectionPos(textBuffer *buf, int *start, int *end,
int *isRect, int *rectStart, int *rectEnd);
char *BufGetSelectionText(textBuffer *buf);
void BufRemoveSelected(textBuffer *buf);
void BufReplaceSelected(textBuffer *buf, char *text);
void BufSecondarySelect(textBuffer *buf, int start, int end);
void BufSecondaryUnselect(textBuffer *buf);
void BufSecRectSelect(textBuffer *buf, int start, int end,
int rectStart, int rectEnd);
int BufGetSecSelectPos(textBuffer *buf, int *start, int *end,
int *isRect, int *rectStart, int *rectEnd);
char *BufGetSecSelectText(textBuffer *buf);
void BufRemoveSecSelect(textBuffer *buf);
void BufReplaceSecSelect(textBuffer *buf, char *text);
void BufHighlight(textBuffer *buf, int start, int end);
void BufUnhighlight(textBuffer *buf);
void BufRectHighlight(textBuffer *buf, int start, int end,
int rectStart, int rectEnd);
int BufGetHighlightPos(textBuffer *buf, int *start, int *end,
int *isRect, int *rectStart, int *rectEnd);
char *BufGetHighlightText(textBuffer *buf);
void BufAddModifyCB(textBuffer *buf, bufModifyCallbackProc bufModifiedCB,
void *cbArg);
void BufRemoveModifyCB(textBuffer *buf, bufModifyCallbackProc bufModifiedCB,
void *cbArg);
char *BufGetLineText(textBuffer *buf, int pos);
int BufStartOfLine(textBuffer *buf, int pos);
int BufEndOfLine(textBuffer *buf, int pos);
int BufGetExpandedChar(textBuffer *buf, int pos, int indent, char *outStr);
int BufExpandCharacter(char c, int indent, char *outStr, int tabDist,
char nullSubsChar);
int BufCharWidth(char c, int indent, int tabDist, char nullSubsChar);
int BufCountDispChars(textBuffer *buf, int lineStartPos, int targetPos);
int BufCountForwardDispChars(textBuffer *buf, int lineStartPos, int nChars);
int BufCountLines(textBuffer *buf, int startPos, int endPos);
int BufCountForwardNLines(textBuffer *buf, int startPos, int nLines);
int BufCountBackwardNLines(textBuffer *buf, int startPos, int nLines);
int BufSearchForward(textBuffer *buf, int startPos, char *searchChars,
int *foundPos);
int BufSearchBackward(textBuffer *buf, int startPos, char *searchChars,
int *foundPos);
int BufSubstituteNullChars(char *string, int length, textBuffer *buf);
void BufUnsubstituteNullChars(char *string, textBuffer *buf);
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