tkText.h
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- /*
- * tkText.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.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkText.h,v 1.13.2.1 2006/10/17 05:38:48 dgp Exp $
- */
- #ifndef _TKTEXT
- #define _TKTEXT
- #ifndef _TK
- #include "tk.h"
- #endif
- #ifndef _TKUNDO
- #include "tkUndo.h"
- #endif
- #ifdef BUILD_tk
- # undef TCL_STORAGE_CLASS
- # define TCL_STORAGE_CLASS DLLEXPORT
- #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;
- /*
- * A structure of the following type holds information for each image
- * embedded in a text widget. This information is only used by the
- * file tkTextImage.c
- */
- typedef struct TkTextEmbImage {
- struct TkText *textPtr; /* Information about the overall text
- * widget. */
- TkTextLine *linePtr; /* Line structure that contains this
- * image. */
- char *imageString; /* Name of the image for this segment */
- char *imageName; /* Name used by text widget to identify
- * this image. May be unique-ified */
- char *name; /* Name used in the hash table.
- * used by "image names" to identify
- * this instance of the image */
- Tk_Image image; /* Image for this segment. NULL
- * means that the image hasn't
- * been created yet. */
- int align; /* How to align image in vertical
- * space. See definitions in
- * tkTextImage.c. */
- int padX, padY; /* Padding to leave around each side
- * of image, in pixels. */
- int chunkCount; /* Number of display chunks that
- * refer to this image. */
- } TkTextEmbImage;
- /*
- * 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. */
- TkTextEmbImage ei; /* Information about embedded
- * image. */
- } 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 byteIndex; /* 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,
- int height, int baseline, Display *display,
- Drawable dst, int screenY));
- 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 lineHeight, int baseline, 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 TextStyle *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 numBytes; /* Number of bytes that will be
- * displayed in the chunk. */
- int minAscent; /* Minimum space above the baseline
- * needed by this chunk. */
- int minDescent; /* Minimum space below the baseline
- * needed by this 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 byte index).
- * <= 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 enum { TEXT_WRAPMODE_NULL, TEXT_WRAPMODE_NONE,
- TEXT_WRAPMODE_CHAR, TEXT_WRAPMODE_WORD
- } TkWrapMode;
- EXTERN Tk_CustomOption TkTextWrapModeOption;
- 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. */
- struct Node *tagRootPtr; /* Pointer into the B-Tree at the lowest
- * node that completely dominates the ranges
- * of text occupied by the tag. At this
- * node there is no information about the
- * tag. One or more children of the node
- * do contain information about the tag. */
- int toggleCount; /* Total number of tag toggles */
- /*
- * 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.
- */
- Tk_3DBorder border; /* Used for drawing background. NULL means
- * no value specified here. */
- char *bdString; /* -borderwidth option string (malloc-ed).
- * NULL means option not specified. */
- int borderWidth; /* Width of 3-D border for background. */
- char *reliefString; /* -relief option string (malloc-ed).
- * NULL means option not specified. */
- int relief; /* 3-D relief for background. */
- Pixmap bgStipple; /* Stipple bitmap for background. None
- * means no value specified here. */
- XColor *fgColor; /* Foreground color for text. NULL means
- * no value specified here. */
- Tk_Font tkfont; /* Font for displaying text. NULL means
- * no value specified here. */
- Pixmap fgStipple; /* Stipple bitmap for text and other
- * foreground stuff. None means no value
- * specified here.*/
- 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 *overstrikeString; /* -overstrike option string (malloc-ed).
- * NULL means option not specified. */
- int overstrike; /* Non-zero means draw horizontal line through
- * middle of text. Only valid if
- * overstrikeString 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. */
- TkWrapMode wrapMode; /* How to handle wrap-around for this tag.
- * Must be TEXT_WRAPMODE_CHAR,
- * TEXT_WRAPMODE_NONE, TEXT_WRAPMODE_WORD,
- * or TEXT_WRAPMODE_NULL to use wrapmode for
- * whole widget. */
- char *elideString; /* -elide option string (malloc-ed).
- * NULL means option not specified. */
- int elide; /* Non-zero means that data under this tag
- * should not be displayed. */
- 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;
- /* enum definining the edit modes of */
- typedef enum {
- TK_TEXT_EDIT_INSERT, /* insert mode */
- TK_TEXT_EDIT_DELETE, /* delete mode */
- TK_TEXT_EDIT_OTHER /* none of the above */
- } TkTextEditMode;
- /*
- * 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.*/
- Display *display; /* Display for widget. Needed, among other
- * things, to allow resources to be freed
- * even after tkwin has gone away. */
- 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. */
- Tcl_HashTable imageTable; /* Hash table that maps from image names
- * to pointers to image segments. If an
- * image segment doesn't yet have an
- * associated image, there is no entry for
- * it here. */
- int state; /* Either STATE_NORMAL or STATE_DISABLED. A
- * text widget is read-only when disabled. */
- /*
- * Default information for displaying (may be overridden by tags
- * applied to ranges of characters).
- */
- Tk_3DBorder border; /* Structure used to draw 3-D border and
- * default background. */
- int borderWidth; /* Width of 3-D border to draw around entire
- * widget. */
- int padX, padY; /* Padding between text and window border. */
- int relief; /* 3-d effect for border around entire
- * widget: TK_RELIEF_RAISED etc. */
- int highlightWidth; /* Width in pixels of highlight to draw
- * around widget when it has the focus.
- * <= 0 means don't draw a highlight. */
- XColor *highlightBgColorPtr;
- /* Color for drawing traversal highlight
- * area when highlight is off. */
- XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
- Tk_Cursor cursor; /* Current cursor for window, or None. */
- XColor *fgColor; /* Default foreground color for text. */
- Tk_Font tkfont; /* Default font for displaying text. */
- int charWidth; /* Width of average character in default
- * font. */
- 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:
- */
- TkWrapMode wrapMode; /* How to handle wrap-around. Must be
- * TEXT_WRAPMODE_CHAR, TEXT_WRAPMODE_NONE, or
- * TEXT_WRAPMODE_WORD. */
- int width, height; /* Desired dimensions for window, measured
- * in characters. */
- int setGrid; /* Non-zero means pass gridding information
- * to window manager. */
- 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 TextDInfo *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. */
- Tk_3DBorder selBorder; /* Border and background for selected
- * characters. This is a copy of information
- * in *cursorTagPtr, so it shouldn't be
- * explicitly freed. */
- char *selBdString; /* Value of -selectborderwidth option, or NULL
- * if not specified (malloc'ed). */
- XColor *selFgColorPtr; /* Foreground color for selected text.
- * This is a copy of information in
- * *cursorTagPtr, so it shouldn't be
- * explicitly freed. */
- int exportSelection; /* Non-zero means tie "sel" tag to X
- * selection. */
- TkTextIndex selIndex; /* Used during multi-pass selection retrievals.
- * This index identifies the next character
- * to be returned from the selection. */
- int abortSelections; /* Set to 1 whenever the text is modified
- * in a way that interferes with selection
- * retrieval: used to abort incremental
- * selection retrievals. */
- int selOffset; /* Offset in selection corresponding to
- * selLine and selCh. -1 means neither
- * this information nor selIndex is of any
- * use. */
- /*
- * Information related to insertion cursor:
- */
- TkTextSegment *insertMarkPtr;
- /* Points to segment for "insert" mark. */
- Tk_3DBorder insertBorder; /* Used to draw vertical bar for insertion
- * cursor. */
- int insertWidth; /* Total width of insert cursor. */
- int insertBorderWidth; /* Width of 3-D border around insert cursor. */
- int insertOnTime; /* Number of milliseconds cursor should spend
- * in "on" state for each blink. */
- int insertOffTime; /* Number of milliseconds cursor should spend
- * in "off" state for each blink. */
- Tcl_TimerToken insertBlinkHandler;
- /* Timer handler used to blink cursor on and
- * off. */
- /*
- * Information used for event bindings associated with tags:
- */
- Tk_BindingTable bindingTable;
- /* Table of all bindings currently defined
- * for this widget. NULL means that no
- * bindings exist, so the table hasn't been
- * created. Each "object" used for this
- * table is the address of a tag. */
- TkTextSegment *currentMarkPtr;
- /* Pointer to segment for "current" mark,
- * or NULL if none. */
- XEvent pickEvent; /* The event from which the current character
- * was chosen. Must be saved so that we
- * can repick after modifications to the
- * text. */
- int numCurTags; /* Number of tags associated with character
- * at current mark. */
- TkTextTag **curTagArrayPtr; /* Pointer to array of tags for current
- * mark, or NULL if none. */
- /*
- * 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. */
- /*
- * Information related to the undo/redo functonality
- */
-
- TkUndoRedoStack * undoStack; /* The undo/redo stack */
-
- int undo; /* non zero means the undo/redo behaviour is
- * enabled */
-
- int maxUndo; /* The maximum depth of the undo stack expressed
- * as the maximum number of compound statements */
- int autoSeparators; /* non zero means the separatorss will be
- * inserted automatically */
-
- int modifiedSet; /* Flag indicating that the 'dirtynesss' of
- * the text widget has been expplicitly set.
- */
- int isDirty; /* Flag indicating the 'dirtynesss' of the text
- * widget. If the flag is not zero, unsaved
- * modifications have been applied to the
- * text widget */
- int isDirtyIncrement; /* Amount with which the isDirty flag is
- * incremented every edit action
- */
- TkTextEditMode lastEditMode; /* Keeps track of what the last edit mode was
- */
- } TkText;
- /*
- * Flag values for TkText records:
- *
- * GOT_SELECTION: Non-zero means we've already claimed the
- * selection.
- * INSERT_ON: Non-zero means insertion cursor should be
- * displayed on screen.
- * GOT_FOCUS: Non-zero means this window has the input
- * focus.
- * BUTTON_DOWN: 1 means that a mouse button is currently
- * down; this is used to implement grabs
- * for the duration of button presses.
- * UPDATE_SCROLLBARS: Non-zero means scrollbar(s) should be updated
- * during next redisplay operation.
- */
- #define GOT_SELECTION 1
- #define INSERT_ON 2
- #define GOT_FOCUS 4
- #define BUTTON_DOWN 8
- #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, TkWrapMode 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_SegType tkTextLeftMarkType;
- EXTERN Tk_SegType tkTextRightMarkType;
- EXTERN Tk_SegType tkTextToggleOnType;
- EXTERN Tk_SegType tkTextToggleOffType;
- /*
- * 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 int TkBTreeBytesInLine _ANSI_ARGS_((TkTextLine *linePtr));
- EXTERN TkTextBTree TkBTreeCreate _ANSI_ARGS_((TkText *textPtr));
- 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,
- CONST 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 TkTextLine * TkBTreePreviousLine _ANSI_ARGS_((TkTextLine *linePtr));
- EXTERN int TkBTreePrevTag _ANSI_ARGS_((TkTextSearch *searchPtr));
- EXTERN void TkBTreeStartSearch _ANSI_ARGS_((TkTextIndex *index1Ptr,
- TkTextIndex *index2Ptr, TkTextTag *tagPtr,
- TkTextSearch *searchPtr));
- EXTERN void TkBTreeStartSearchBack _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 TkTextBindProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- 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,
- TkWrapMode 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,
- CONST 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, CONST char *string,
- TkTextIndex *indexPtr));
- EXTERN TkTextTabArray * TkTextGetTabs _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Window tkwin, char *string));
- EXTERN void TkTextIndexBackBytes _ANSI_ARGS_((
- CONST TkTextIndex *srcPtr, int count,
- TkTextIndex *dstPtr));
- EXTERN void TkTextIndexBackChars _ANSI_ARGS_((
- CONST TkTextIndex *srcPtr, int count,
- TkTextIndex *dstPtr));
- EXTERN int TkTextIndexCmp _ANSI_ARGS_((
- CONST TkTextIndex *index1Ptr,
- CONST TkTextIndex *index2Ptr));
- EXTERN void TkTextIndexForwBytes _ANSI_ARGS_((
- CONST TkTextIndex *srcPtr, int count,
- TkTextIndex *dstPtr));
- EXTERN void TkTextIndexForwChars _ANSI_ARGS_((
- CONST TkTextIndex *srcPtr, int count,
- TkTextIndex *dstPtr));
- EXTERN TkTextSegment * TkTextIndexToSeg _ANSI_ARGS_((
- CONST TkTextIndex *indexPtr, int *offsetPtr));
- EXTERN void TkTextInsertDisplayProc _ANSI_ARGS_((
- TkTextDispChunk *chunkPtr, int x, int y, int height,
- int baseline, Display *display, Drawable dst,
- int screenY));
- EXTERN void TkTextLostSelection _ANSI_ARGS_((
- ClientData clientData));
- EXTERN TkTextIndex * TkTextMakeCharIndex _ANSI_ARGS_((TkTextBTree tree,
- int lineIndex, int charIndex,
- TkTextIndex *indexPtr));
- EXTERN int TkTextIsElided _ANSI_ARGS_((TkText *textPtr,
- TkTextIndex *indexPtr));
- EXTERN TkTextIndex * TkTextMakeByteIndex _ANSI_ARGS_((TkTextBTree tree,
- int lineIndex, int byteIndex,
- TkTextIndex *indexPtr));
- EXTERN int TkTextMarkCmd _ANSI_ARGS_((TkText *textPtr,
- Tcl_Interp *interp, int argc, CONST char **argv));
- EXTERN int TkTextMarkNameToIndex _ANSI_ARGS_((TkText *textPtr,
- CONST 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_((
- CONST 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, CONST char **argv));
- EXTERN int TkTextSeeCmd _ANSI_ARGS_((TkText *textPtr,
- Tcl_Interp *interp, int argc, CONST char **argv));
- EXTERN int TkTextSegToOffset _ANSI_ARGS_((
- CONST TkTextSegment *segPtr,
- CONST TkTextLine *linePtr));
- EXTERN TkTextSegment * TkTextSetMark _ANSI_ARGS_((TkText *textPtr,
- CONST 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, CONST char **argv));
- EXTERN int TkTextImageCmd _ANSI_ARGS_((TkText *textPtr,
- Tcl_Interp *interp, int argc, CONST char **argv));
- EXTERN int TkTextImageIndex _ANSI_ARGS_((TkText *textPtr,
- CONST char *name, TkTextIndex *indexPtr));
- EXTERN int TkTextWindowCmd _ANSI_ARGS_((TkText *textPtr,
- Tcl_Interp *interp, int argc, CONST char **argv));
- EXTERN int TkTextWindowIndex _ANSI_ARGS_((TkText *textPtr,
- CONST char *name, TkTextIndex *indexPtr));
- EXTERN int TkTextXviewCmd _ANSI_ARGS_((TkText *textPtr,
- Tcl_Interp *interp, int argc, CONST char **argv));
- EXTERN int TkTextYviewCmd _ANSI_ARGS_((TkText *textPtr,
- Tcl_Interp *interp, int argc, CONST char **argv));
- # undef TCL_STORAGE_CLASS
- # define TCL_STORAGE_CLASS DLLIMPORT
- #endif /* _TKTEXT */