/* * tkText.h (CTk.h) -- * * Declarations shared among the files that implement text * widgets. * * Copyright (c) 1992-1994 The Regents of the University of California. * Copyright (c) 1994-1995 Sun Microsystems, Inc. * Copyright (c) 1994-1995 Cleveland Clinic Foundation * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * @(#) $Id: ctk.shar,v 1.50 1996/01/15 14:47:16 andrewm Exp andrewm $ */ #ifndef _TKTEXT #define _TKTEXT #ifndef _TK #include "tk.h" #endif /* * Opaque types for structures whose guts are only needed by a single * file: */ typedef struct TkTextBTree *TkTextBTree; /* * The data structure below defines a single line of text (from newline * to newline, not necessarily what appears on one line of the screen). */ typedef struct TkTextLine { struct Node *parentPtr; /* Pointer to parent node containing * line. */ struct TkTextLine *nextPtr; /* Next in linked list of lines with * same parent node in B-tree. NULL * means end of list. */ struct TkTextSegment *segPtr; /* First in ordered list of segments * that make up the line. */ } TkTextLine; /* * ----------------------------------------------------------------------- * Segments: each line is divided into one or more segments, where each * segment is one of several things, such as a group of characters, a * tag toggle, a mark, or an embedded widget. Each segment starts with * a standard header followed by a body that varies from type to type. * ----------------------------------------------------------------------- */ /* * The data structure below defines the body of a segment that represents * a tag toggle. There is one of these structures at both the beginning * and end of each tagged range. */ typedef struct TkTextToggle { struct TkTextTag *tagPtr; /* Tag that starts or ends here. */ int inNodeCounts; /* 1 means this toggle has been * accounted for in node toggle * counts; 0 means it hasn't, yet. */ } TkTextToggle; /* * The data structure below defines line segments that represent * marks. There is one of these for each mark in the text. */ typedef struct TkTextMark { struct TkText *textPtr; /* Overall information about text * widget. */ TkTextLine *linePtr; /* Line structure that contains the * segment. */ Tcl_HashEntry *hPtr; /* Pointer to hash table entry for mark * (in textPtr->markTable). */ } TkTextMark; /* * A structure of the following type holds information for each window * embedded in a text widget. This information is only used by the * file tkTextWind.c */ typedef struct TkTextEmbWindow { struct TkText *textPtr; /* Information about the overall text * widget. */ TkTextLine *linePtr; /* Line structure that contains this * window. */ Tk_Window tkwin; /* Window for this segment. NULL * means that the window hasn't * been created yet. */ char *create; /* Script to create window on-demand. * NULL means no such script. * Malloc-ed. */ int align; /* How to align window in vertical * space. See definitions in * tkTextWind.c. */ int padX, padY; /* Padding to leave around each side * of window, in pixels. */ int stretch; /* Should window stretch to fill * vertical space of line (except for * pady)? 0 or 1. */ int chunkCount; /* Number of display chunks that * refer to this window. */ int displayed; /* Non-zero means that the window * has been displayed on the screen * recently. */ } TkTextEmbWindow; /* * The data structure below defines line segments. */ typedef struct TkTextSegment { struct Tk_SegType *typePtr; /* Pointer to record describing * segment's type. */ struct TkTextSegment *nextPtr; /* Next in list of segments for this * line, or NULL for end of list. */ int size; /* Size of this segment (# of bytes * of index space it occupies). */ union { char chars[4]; /* Characters that make up character * info. Actual length varies to * hold as many characters as needed.*/ TkTextToggle toggle; /* Information about tag toggle. */ TkTextMark mark; /* Information about mark. */ TkTextEmbWindow ew; /* Information about embedded * window. */ } body; } TkTextSegment; /* * Data structures of the type defined below are used during the * execution of Tcl commands to keep track of various interesting * places in a text. An index is only valid up until the next * modification to the character structure of the b-tree so they * can't be retained across Tcl commands. However, mods to marks * or tags don't invalidate indices. */ typedef struct TkTextIndex { TkTextBTree tree; /* Tree containing desired position. */ TkTextLine *linePtr; /* Pointer to line containing position * of interest. */ int charIndex; /* Index within line of desired * character (0 means first one). */ } TkTextIndex; /* * Types for procedure pointers stored in TkTextDispChunk strutures: */ typedef struct TkTextDispChunk TkTextDispChunk; typedef void Tk_ChunkDisplayProc _ANSI_ARGS_(( TkTextDispChunk *chunkPtr, int x, int y, Tk_Window win)); typedef void Tk_ChunkUndisplayProc _ANSI_ARGS_(( struct TkText *textPtr, TkTextDispChunk *chunkPtr)); typedef int Tk_ChunkMeasureProc _ANSI_ARGS_(( TkTextDispChunk *chunkPtr, int x)); typedef void Tk_ChunkBboxProc _ANSI_ARGS_(( TkTextDispChunk *chunkPtr, int index, int y, int *xPtr, int *yPtr, int *widthPtr, int *heightPtr)); /* * The structure below represents a chunk of stuff that is displayed * together on the screen. This structure is allocated and freed by * generic display code but most of its fields are filled in by * segment-type-specific code. */ struct TkTextDispChunk { /* * The fields below are set by the type-independent code before * calling the segment-type-specific layoutProc. They should not * be modified by segment-type-specific code. */ int x; /* X position of chunk, in pixels. * This position is measured from the * left edge of the logical line, * not from the left edge of the * window (i.e. it doesn't change * under horizontal scrolling). */ struct TkTextDispChunk *nextPtr; /* Next chunk in the display line * or NULL for the end of the list. */ struct Style *stylePtr; /* Display information, known only * to tkTextDisp.c. */ /* * The fields below are set by the layoutProc that creates the * chunk. */ Tk_ChunkDisplayProc *displayProc; /* Procedure to invoke to draw this * chunk on the display or an * off-screen pixmap. */ Tk_ChunkUndisplayProc *undisplayProc; /* Procedure to invoke when segment * ceases to be displayed on screen * anymore. */ Tk_ChunkMeasureProc *measureProc; /* Procedure to find character under * a given x-location. */ Tk_ChunkBboxProc *bboxProc; /* Procedure to find bounding box * of character in chunk. */ int numChars; /* Number of characters that will be * displayed in the chunk. */ int minHeight; /* Minimum total line height needed * by this chunk. */ int width; /* Width of this chunk, in pixels. * Initially set by chunk-specific * code, but may be increased to * include tab or extra space at end * of line. */ int breakIndex; /* Index within chunk of last * acceptable position for a line * (break just before this character). * <= 0 means don't break during or * immediately after this chunk. */ ClientData clientData; /* Additional information for use * of displayProc and undisplayProc. */ }; /* * One data structure of the following type is used for each tag in a * text widget. These structures are kept in textPtr->tagTable and * referred to in other structures. */ typedef struct TkTextTag { char *name; /* Name of this tag. This field is actually * a pointer to the key from the entry in * textPtr->tagTable, so it needn't be freed * explicitly. */ int priority; /* Priority of this tag within widget. 0 * means lowest priority. Exactly one tag * has each integer value between 0 and * numTags-1. */ /* * Information for displaying text with this tag. The information * belows acts as an override on information specified by lower-priority * tags. If no value is specified, then the next-lower-priority tag * on the text determins the value. The text widget itself provides * defaults if no tag specifies an override. */ char *justifyString; /* -justify option string (malloc-ed). * NULL means option not specified. */ Tk_Justify justify; /* How to justify text: TK_JUSTIFY_LEFT, * TK_JUSTIFY_RIGHT, or TK_JUSTIFY_CENTER. * Only valid if justifyString is non-NULL. */ char *lMargin1String; /* -lmargin1 option string (malloc-ed). * NULL means option not specified. */ int lMargin1; /* Left margin for first display line of * each text line, in pixels. Only valid * if lMargin1String is non-NULL. */ char *lMargin2String; /* -lmargin2 option string (malloc-ed). * NULL means option not specified. */ int lMargin2; /* Left margin for second and later display * lines of each text line, in pixels. Only * valid if lMargin2String is non-NULL. */ char *offsetString; /* -offset option string (malloc-ed). * NULL means option not specified. */ int offset; /* Vertical offset of text's baseline from * baseline of line. Used for superscripts * and subscripts. Only valid if * offsetString is non-NULL. */ char *rMarginString; /* -rmargin option string (malloc-ed). * NULL means option not specified. */ int rMargin; /* Right margin for text, in pixels. Only * valid if rMarginString is non-NULL. */ char *spacing1String; /* -spacing1 option string (malloc-ed). * NULL means option not specified. */ int spacing1; /* Extra spacing above first display * line for text line. Only valid if * spacing1String is non-NULL. */ char *spacing2String; /* -spacing2 option string (malloc-ed). * NULL means option not specified. */ int spacing2; /* Extra spacing between display * lines for the same text line. Only valid * if spacing2String is non-NULL. */ char *spacing3String; /* -spacing2 option string (malloc-ed). * NULL means option not specified. */ int spacing3; /* Extra spacing below last display * line for text line. Only valid if * spacing3String is non-NULL. */ char *tabString; /* -tabs option string (malloc-ed). * NULL means option not specified. */ struct TkTextTabArray *tabArrayPtr; /* Info about tabs for tag (malloc-ed) * or NULL. Corresponds to tabString. */ char *underlineString; /* -underline option string (malloc-ed). * NULL means option not specified. */ int underline; /* Non-zero means draw underline underneath * text. Only valid if underlineString is * non-NULL. */ Tk_Uid wrapMode; /* How to handle wrap-around for this tag. * Must be tkTextCharUid, tkTextNoneUid, * tkTextWordUid, or NULL to use wrapMode * for whole widget. */ int affectsDisplay; /* Non-zero means that this tag affects the * way information is displayed on the screen * (so need to redisplay if tag changes). */ } TkTextTag; #define TK_TAG_AFFECTS_DISPLAY 0x1 #define TK_TAG_UNDERLINE 0x2 #define TK_TAG_JUSTIFY 0x4 #define TK_TAG_OFFSET 0x10 /* * The data structure below is used for searching a B-tree for transitions * on a single tag (or for all tag transitions). No code outside of * tkTextBTree.c should ever modify any of the fields in these structures, * but it's OK to use them for read-only information. */ typedef struct TkTextSearch { TkTextIndex curIndex; /* Position of last tag transition * returned by TkBTreeNextTag, or * index of start of segment * containing starting position for * search if TkBTreeNextTag hasn't * been called yet, or same as * stopIndex if search is over. */ TkTextSegment *segPtr; /* Actual tag segment returned by last * call to TkBTreeNextTag, or NULL if * TkBTreeNextTag hasn't returned * anything yet. */ TkTextSegment *nextPtr; /* Where to resume search in next * call to TkBTreeNextTag. */ TkTextSegment *lastPtr; /* Stop search before just before * considering this segment. */ TkTextTag *tagPtr; /* Tag to search for (or tag found, if * allTags is non-zero). */ int linesLeft; /* Lines left to search (including * curIndex and stopIndex). When * this becomes <= 0 the search is * over. */ int allTags; /* Non-zero means ignore tag check: * search for transitions on all * tags. */ } TkTextSearch; /* * The following data structure describes a single tab stop. */ typedef enum {LEFT, RIGHT, CENTER, NUMERIC} TkTextTabAlign; typedef struct TkTextTab { int location; /* Offset in pixels of this tab stop * from the left margin (lmargin2) of * the text. */ TkTextTabAlign alignment; /* Where the tab stop appears relative * to the text. */ } TkTextTab; typedef struct TkTextTabArray { int numTabs; /* Number of tab stops. */ TkTextTab tabs[1]; /* Array of tabs. The actual size * will be numTabs. THIS FIELD MUST * BE THE LAST IN THE STRUCTURE. */ } TkTextTabArray; /* * A data structure of the following type is kept for each text widget that * currently exists for this process: */ typedef struct TkText { Tk_Window tkwin; /* Window that embodies the text. NULL * means that the window has been destroyed * but the data structures haven't yet been * cleaned up.*/ Tcl_Interp *interp; /* Interpreter associated with widget. Used * to delete widget command. */ Tcl_Command widgetCmd; /* Token for text's widget command. */ TkTextBTree tree; /* B-tree representation of text and tags for * widget. */ Tcl_HashTable tagTable; /* Hash table that maps from tag names to * pointers to TkTextTag structures. */ int numTags; /* Number of tags currently defined for * widget; needed to keep track of * priorities. */ Tcl_HashTable markTable; /* Hash table that maps from mark names to * pointers to mark segments. */ Tcl_HashTable windowTable; /* Hash table that maps from window names * to pointers to window segments. If a * window segment doesn't yet have an * associated window, there is no entry for * it here. */ Tk_Uid state; /* Normal or disabled. Text is read-only * when disabled. */ /* * Default information for displaying (may be overridden by tags * applied to ranges of characters). */ int borderWidth; /* Width of 3-D border to draw around entire * widget. */ int padX, padY; /* Padding between text and window border. */ int spacing1; /* Default extra spacing above first display * line for each text line. */ int spacing2; /* Default extra spacing between display lines * for the same text line. */ int spacing3; /* Default extra spacing below last display * line for each text line. */ char *tabOptionString; /* Value of -tabs option string (malloc'ed). */ TkTextTabArray *tabArrayPtr; /* Information about tab stops (malloc'ed). * NULL means perform default tabbing * behavior. */ /* * Additional information used for displaying: */ Tk_Uid wrapMode; /* How to handle wrap-around. Must be * tkTextCharUid, tkTextNoneUid, or * tkTextWordUid. */ int width, height; /* Desired dimensions for window, measured * in characters. */ int prevWidth, prevHeight; /* Last known dimensions of window; used to * detect changes in size. */ TkTextIndex topIndex; /* Identifies first character in top display * line of window. */ struct DInfo *dInfoPtr; /* Information maintained by tkTextDisp.c. */ /* * Information related to selection. */ TkTextTag *selTagPtr; /* Pointer to "sel" tag. Used to tell when * a new selection has been made. */ TkTextIndex selIndex; /* Used during multi-pass selection retrievals. * This index identifies the next character * to be returned from the selection. */ /* * Information related to insertion cursor: */ TkTextSegment *insertMarkPtr; /* Points to segment for "insert" mark. */ /* * Miscellaneous additional information: */ char *takeFocus; /* Value of -takeFocus option; not used in * the C code, but used by keyboard traversal * scripts. Malloc'ed, but may be NULL. */ char *xScrollCmd; /* Prefix of command to issue to update * horizontal scrollbar when view changes. */ char *yScrollCmd; /* Prefix of command to issue to update * vertical scrollbar when view changes. */ int flags; /* Miscellaneous flags; see below for * definitions. */ } TkText; /* * Flag values for TkText records: * * GOT_FOCUS: Non-zero means this window has the input * focus. * UPDATE_SCROLLBARS: Non-zero means scrollbar(s) should be updated * during next redisplay operation. */ #define GOT_FOCUS 4 #define UPDATE_SCROLLBARS 0x10 #define NEED_REPICK 0x20 /* * Records of the following type define segment types in terms of * a collection of procedures that may be called to manipulate * segments of that type. */ typedef TkTextSegment * Tk_SegSplitProc _ANSI_ARGS_(( struct TkTextSegment *segPtr, int index)); typedef int Tk_SegDeleteProc _ANSI_ARGS_(( struct TkTextSegment *segPtr, TkTextLine *linePtr, int treeGone)); typedef TkTextSegment * Tk_SegCleanupProc _ANSI_ARGS_(( struct TkTextSegment *segPtr, TkTextLine *linePtr)); typedef void Tk_SegLineChangeProc _ANSI_ARGS_(( struct TkTextSegment *segPtr, TkTextLine *linePtr)); typedef int Tk_SegLayoutProc _ANSI_ARGS_((struct TkText *textPtr, struct TkTextIndex *indexPtr, TkTextSegment *segPtr, int offset, int maxX, int maxChars, int noCharsYet, Tk_Uid wrapMode, struct TkTextDispChunk *chunkPtr)); typedef void Tk_SegCheckProc _ANSI_ARGS_((TkTextSegment *segPtr, TkTextLine *linePtr)); typedef struct Tk_SegType { char *name; /* Name of this kind of segment. */ int leftGravity; /* If a segment has zero size (e.g. a * mark or tag toggle), does it * attach to character to its left * or right? 1 means left, 0 means * right. */ Tk_SegSplitProc *splitProc; /* Procedure to split large segment * into two smaller ones. */ Tk_SegDeleteProc *deleteProc; /* Procedure to call to delete * segment. */ Tk_SegCleanupProc *cleanupProc; /* After any change to a line, this * procedure is invoked for all * segments left in the line to * perform any cleanup they wish * (e.g. joining neighboring * segments). */ Tk_SegLineChangeProc *lineChangeProc; /* Invoked when a segment is about * to be moved from its current line * to an earlier line because of * a deletion. The linePtr is that * for the segment's old line. * CleanupProc will be invoked after * the deletion is finished. */ Tk_SegLayoutProc *layoutProc; /* Returns size information when * figuring out what to display in * window. */ Tk_SegCheckProc *checkProc; /* Called during consistency checks * to check internal consistency of * segment. */ } Tk_SegType; /* * The constant below is used to specify a line when what is really * wanted is the entire text. For now, just use a very big number. */ #define TK_END_OF_TEXT 1000000 /* * The following definition specifies the maximum number of characters * needed in a string to hold a position specifier. */ #define TK_POS_CHARS 30 /* * Declarations for variables shared among the text-related files: */ extern int tkBTreeDebug; extern int tkTextDebug; extern Tk_SegType tkTextCharType; extern Tk_Uid tkTextCharUid; extern Tk_Uid tkTextDisabledUid; extern Tk_SegType tkTextLeftMarkType; extern Tk_Uid tkTextNoneUid; extern Tk_Uid tkTextNormalUid; extern Tk_SegType tkTextRightMarkType; extern Tk_SegType tkTextToggleOnType; extern Tk_SegType tkTextToggleOffType; extern Tk_Uid tkTextWordUid; /* * Declarations for procedures that are used by the text-related files * but shouldn't be used anywhere else in Tk (or by Tk clients): */ extern int TkBTreeCharTagged _ANSI_ARGS_((TkTextIndex *indexPtr, TkTextTag *tagPtr)); extern void TkBTreeCheck _ANSI_ARGS_((TkTextBTree tree)); extern int TkBTreeCharsInLine _ANSI_ARGS_((TkTextLine *linePtr)); extern TkTextBTree TkBTreeCreate _ANSI_ARGS_((void)); extern void TkBTreeDestroy _ANSI_ARGS_((TkTextBTree tree)); extern void TkBTreeDeleteChars _ANSI_ARGS_((TkTextIndex *index1Ptr, TkTextIndex *index2Ptr)); extern TkTextLine * TkBTreeFindLine _ANSI_ARGS_((TkTextBTree tree, int line)); extern TkTextTag ** TkBTreeGetTags _ANSI_ARGS_((TkTextIndex *indexPtr, int *numTagsPtr)); extern void TkBTreeInsertChars _ANSI_ARGS_((TkTextIndex *indexPtr, char *string)); extern int TkBTreeLineIndex _ANSI_ARGS_((TkTextLine *linePtr)); extern void TkBTreeLinkSegment _ANSI_ARGS_((TkTextSegment *segPtr, TkTextIndex *indexPtr)); extern TkTextLine * TkBTreeNextLine _ANSI_ARGS_((TkTextLine *linePtr)); extern int TkBTreeNextTag _ANSI_ARGS_((TkTextSearch *searchPtr)); extern int TkBTreeNumLines _ANSI_ARGS_((TkTextBTree tree)); extern void TkBTreeStartSearch _ANSI_ARGS_((TkTextIndex *index1Ptr, TkTextIndex *index2Ptr, TkTextTag *tagPtr, TkTextSearch *searchPtr)); extern void TkBTreeTag _ANSI_ARGS_((TkTextIndex *index1Ptr, TkTextIndex *index2Ptr, TkTextTag *tagPtr, int add)); extern void TkBTreeUnlinkSegment _ANSI_ARGS_((TkTextBTree tree, TkTextSegment *segPtr, TkTextLine *linePtr)); extern void TkTextChanged _ANSI_ARGS_((TkText *textPtr, TkTextIndex *index1Ptr, TkTextIndex *index2Ptr)); extern int TkTextCharBbox _ANSI_ARGS_((TkText *textPtr, TkTextIndex *indexPtr, int *xPtr, int *yPtr, int *widthPtr, int *heightPtr)); extern int TkTextCharLayoutProc _ANSI_ARGS_((TkText *textPtr, TkTextIndex *indexPtr, TkTextSegment *segPtr, int offset, int maxX, int maxChars, int noBreakYet, Tk_Uid wrapMode, TkTextDispChunk *chunkPtr)); extern void TkTextCreateDInfo _ANSI_ARGS_((TkText *textPtr)); extern int TkTextDLineInfo _ANSI_ARGS_((TkText *textPtr, TkTextIndex *indexPtr, int *xPtr, int *yPtr, int *widthPtr, int *heightPtr, int *basePtr)); extern TkTextTag * TkTextCreateTag _ANSI_ARGS_((TkText *textPtr, char *tagName)); extern void TkTextFreeDInfo _ANSI_ARGS_((TkText *textPtr)); extern void TkTextFreeTag _ANSI_ARGS_((TkText *textPtr, TkTextTag *tagPtr)); extern int TkTextGetIndex _ANSI_ARGS_((Tcl_Interp *interp, TkText *textPtr, char *string, TkTextIndex *indexPtr)); extern TkTextTabArray * TkTextGetTabs _ANSI_ARGS_((Tcl_Interp *interp, Tk_Window tkwin, char *string)); extern void TkTextIndexBackChars _ANSI_ARGS_((TkTextIndex *srcPtr, int count, TkTextIndex *dstPtr)); extern int TkTextIndexCmp _ANSI_ARGS_((TkTextIndex *index1Ptr, TkTextIndex *index2Ptr)); extern void TkTextIndexForwChars _ANSI_ARGS_((TkTextIndex *srcPtr, int count, TkTextIndex *dstPtr)); extern TkTextSegment * TkTextIndexToSeg _ANSI_ARGS_((TkTextIndex *indexPtr, int *offsetPtr)); extern void TkTextLostSelection _ANSI_ARGS_(( ClientData clientData)); extern TkTextIndex * TkTextMakeIndex _ANSI_ARGS_((TkTextBTree tree, int lineIndex, int charIndex, TkTextIndex *indexPtr)); extern int TkTextMarkCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); extern int TkTextMarkNameToIndex _ANSI_ARGS_((TkText *textPtr, char *name, TkTextIndex *indexPtr)); extern void TkTextMarkSegToIndex _ANSI_ARGS_((TkText *textPtr, TkTextSegment *markPtr, TkTextIndex *indexPtr)); extern void TkTextEventuallyRepick _ANSI_ARGS_((TkText *textPtr)); extern void TkTextPickCurrent _ANSI_ARGS_((TkText *textPtr, XEvent *eventPtr)); extern void TkTextPixelIndex _ANSI_ARGS_((TkText *textPtr, int x, int y, TkTextIndex *indexPtr)); extern void TkTextPrintIndex _ANSI_ARGS_((TkTextIndex *indexPtr, char *string)); extern void TkTextRedrawRegion _ANSI_ARGS_((TkText *textPtr, int x, int y, int width, int height)); extern void TkTextRedrawTag _ANSI_ARGS_((TkText *textPtr, TkTextIndex *index1Ptr, TkTextIndex *index2Ptr, TkTextTag *tagPtr, int withTag)); extern void TkTextRelayoutWindow _ANSI_ARGS_((TkText *textPtr)); extern int TkTextScanCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); extern int TkTextSeeCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); extern int TkTextSegToOffset _ANSI_ARGS_((TkTextSegment *segPtr, TkTextLine *linePtr)); extern TkTextSegment * TkTextSetMark _ANSI_ARGS_((TkText *textPtr, char *name, TkTextIndex *indexPtr)); extern void TkTextSetYView _ANSI_ARGS_((TkText *textPtr, TkTextIndex *indexPtr, int pickPlace)); extern int TkTextTagCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); extern int TkTextWindowCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); extern int TkTextWindowIndex _ANSI_ARGS_((TkText *textPtr, char *name, TkTextIndex *indexPtr)); extern int TkTextXviewCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); extern int TkTextYviewCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); #endif /* _TKTEXT */