source/textBuf.h

   1 /* $Id: textBuf.h,v 1.12 2002/10/14 18:41:07 n8gray Exp $ */
   2
   3 #ifndef NEDIT_TEXTBUF_H_INCLUDED
   4 #define NEDIT_TEXTBUF_H_INCLUDED
   5
   6 #include "rangeset.h"
   7
   8 /* Maximum length in characters of a tab or control character expansion
   9    of a single buffer character */
  10 #define MAX_EXP_CHAR_LEN 20
  11
  12 typedef struct {
  13     char selected;          /* True if the selection is active */
  14     char rectangular;       /* True if the selection is rectangular */
  15     char zeroWidth;         /* Width 0 selections aren't "real" selections, but
  16                                 they can be useful when creating rectangular
  17                                 selections from the keyboard. */
  18     int start;              /* Pos. of start of selection, or if rectangular
  19                                  start of line containing it. */
  20     int end;                /* Pos. of end of selection, or if rectangular
  21                                  end of line containing it. */
  22     int rectStart;          /* Indent of left edge of rect. selection */
  23     int rectEnd;            /* Indent of right edge of rect. selection */
  24 } selection;
  25
  26 typedef void (*bufModifyCallbackProc)(int pos, int nInserted, int nDeleted,
  27         int nRestyled, char *deletedText, void *cbArg);
  28 typedef void (*bufPreDeleteCallbackProc)(int pos, int nDeleted, void *cbArg);
  29
  30 typedef struct _textBuffer {
  31     int length;                 /* length of the text in the buffer (the length
  32                                    of the buffer itself must be calculated:
  33                                    gapEnd - gapStart + length) */
  34     char *buf;                  /* allocated memory where the text is stored */
  35     int gapStart;               /* points to the first character of the gap */
  36     int gapEnd;                 /* points to the first char after the gap */
  37     selection primary;          /* highlighted areas */
  38     selection secondary;
  39     selection highlight;
  40     int tabDist;                /* equiv. number of characters in a tab */
  41     int useTabs;                /* True if buffer routines are allowed to use
  42                                    tabs for padding in rectangular operations */
  43     int nModifyProcs;           /* number of modify-redisplay procs attached */
  44     bufModifyCallbackProc       /* procedures to call when buffer is */
  45             *modifyProcs;       /*    modified to redisplay contents */
  46     void **cbArgs;              /* caller arguments for modifyProcs above */
  47     int nPreDeleteProcs;        /* number of pre-delete procs attached */
  48     bufPreDeleteCallbackProc    /* procedure to call before text is deleted */
  49          *preDeleteProcs;       /* from the buffer; at most one is supported. */
  50     void **preDeleteCbArgs;     /* caller argument for pre-delete proc above */
  51     int cursorPosHint;          /* hint for reasonable cursor position after
  52                                    a buffer modification operation */
  53     char nullSubsChar;          /* NEdit is based on C null-terminated strings,
  54                                    so ascii-nul characters must be substituted
  55                                    with something else.  This is the else, but
  56                                    of course, things get quite messy when you
  57                                    use it */
  58     RangesetTable *rangesetTable;
  59                                 /* current range sets */
  60 } textBuffer;
  61
  62 textBuffer *BufCreate(void);
  63 textBuffer *BufCreatePreallocated(int requestedSize);
  64 void BufFree(textBuffer *buf);
  65 char *BufGetAll(textBuffer *buf);
  66 void BufSetAll(textBuffer *buf, const char *text);
  67 char *BufGetRange(textBuffer *buf, int start, int end);
  68 char BufGetCharacter(textBuffer *buf, int pos);
  69 char *BufGetTextInRect(textBuffer *buf, int start, int end,
  70         int rectStart, int rectEnd);
  71 void BufInsert(textBuffer *buf, int pos, const char *text);
  72 void BufRemove(textBuffer *buf, int start, int end);
  73 void BufReplace(textBuffer *buf, int start, int end, const char *text);
  74 void BufCopyFromBuf(textBuffer *fromBuf, textBuffer *toBuf, int fromStart,
  75         int fromEnd, int toPos);
  76 void BufInsertCol(textBuffer *buf, int column, int startPos, const char *text,
  77         int *charsInserted, int *charsDeleted);
  78 void BufReplaceRect(textBuffer *buf, int start, int end, int rectStart,
  79         int rectEnd, const char *text);
  80 void BufRemoveRect(textBuffer *buf, int start, int end, int rectStart,
  81         int rectEnd);
  82 void BufOverlayRect(textBuffer *buf, int startPos, int rectStart,
  83         int rectEnd, const char *text, int *charsInserted, int *charsDeleted);
  84 void BufClearRect(textBuffer *buf, int start, int end, int rectStart,
  85         int rectEnd);
  86 int BufGetTabDistance(textBuffer *buf);
  87 void BufSetTabDistance(textBuffer *buf, int tabDist);
  88 void BufCheckDisplay(textBuffer *buf, int start, int end);
  89 void BufSelect(textBuffer *buf, int start, int end);
  90 void BufUnselect(textBuffer *buf);
  91 void BufRectSelect(textBuffer *buf, int start, int end, int rectStart,
  92         int rectEnd);
  93 int BufGetSelectionPos(textBuffer *buf, int *start, int *end,
  94         int *isRect, int *rectStart, int *rectEnd);
  95 char *BufGetSelectionText(textBuffer *buf);
  96 void BufRemoveSelected(textBuffer *buf);
  97 void BufReplaceSelected(textBuffer *buf, const char *text);
  98 void BufSecondarySelect(textBuffer *buf, int start, int end);
  99 void BufSecondaryUnselect(textBuffer *buf);
 100 void BufSecRectSelect(textBuffer *buf, int start, int end,
 101         int rectStart, int rectEnd);
 102 int BufGetSecSelectPos(textBuffer *buf, int *start, int *end,
 103         int *isRect, int *rectStart, int *rectEnd);
 104 char *BufGetSecSelectText(textBuffer *buf);
 105 void BufRemoveSecSelect(textBuffer *buf);
 106 void BufReplaceSecSelect(textBuffer *buf, const char *text);
 107 void BufHighlight(textBuffer *buf, int start, int end);
 108 void BufUnhighlight(textBuffer *buf);
 109 void BufRectHighlight(textBuffer *buf, int start, int end,
 110         int rectStart, int rectEnd);
 111 int BufGetHighlightPos(textBuffer *buf, int *start, int *end,
 112         int *isRect, int *rectStart, int *rectEnd);
 113 char *BufGetHighlightText(textBuffer *buf);
 114 void BufAddModifyCB(textBuffer *buf, bufModifyCallbackProc bufModifiedCB,
 115         void *cbArg);
 116 void BufRemoveModifyCB(textBuffer *buf, bufModifyCallbackProc bufModifiedCB,
 117         void *cbArg);
 118 void BufAddPreDeleteCB(textBuffer *buf, bufPreDeleteCallbackProc bufPreDeleteCB,
 119         void *cbArg);
 120 void BufRemovePreDeleteCB(textBuffer *buf, bufPreDeleteCallbackProc
 121         bufPreDeleteCB, void *cbArg);
 122 char *BufGetLineText(textBuffer *buf, int pos);
 123 int BufStartOfLine(textBuffer *buf, int pos);
 124 int BufEndOfLine(textBuffer *buf, int pos);
 125 int BufGetExpandedChar(textBuffer *buf, int pos, int indent, char *outStr);
 126 int BufExpandCharacter(char c, int indent, char *outStr, int tabDist,
 127         char nullSubsChar);
 128 int BufCharWidth(char c, int indent, int tabDist, char nullSubsChar);
 129 int BufCountDispChars(textBuffer *buf, int lineStartPos, int targetPos);
 130 int BufCountForwardDispChars(textBuffer *buf, int lineStartPos, int nChars);
 131 int BufCountLines(textBuffer *buf, int startPos, int endPos);
 132 int BufCountForwardNLines(textBuffer *buf, int startPos, int nLines);
 133 int BufCountBackwardNLines(textBuffer *buf, int startPos, int nLines);
 134 int BufSearchForward(textBuffer *buf, int startPos, const char *searchChars,
 135         int *foundPos);
 136 int BufSearchBackward(textBuffer *buf, int startPos, const char *searchChars,
 137         int *foundPos);
 138 int BufSubstituteNullChars(char *string, int length, textBuffer *buf);
 139 void BufUnsubstituteNullChars(char *string, textBuffer *buf);
 140 int BufCmp(textBuffer * buf, int pos, int len, const char *cmpText);
 141
 142 #endif /* NEDIT_TEXTBUF_H_INCLUDED */