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-rw-r--r--generic/tkTextBTree.c2149
1 files changed, 1075 insertions, 1074 deletions
diff --git a/generic/tkTextBTree.c b/generic/tkTextBTree.c
index 1919849..d77197f 100644
--- a/generic/tkTextBTree.c
+++ b/generic/tkTextBTree.c
@@ -1,17 +1,17 @@
-/*
+/*
* tkTextBTree.c --
*
- * This file contains code that manages the B-tree representation
- * of text for Tk's text widget and implements character and
- * toggle segment types.
- *
+ * This file contains code that manages the B-tree representation of text
+ * for Tk's text widget and implements character and toggle segment
+ * types.
+ *
* 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.
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkTextBTree.c,v 1.16 2005/02/14 23:00:44 vincentdarley Exp $
+ * RCS: @(#) $Id: tkTextBTree.c,v 1.17 2005/07/29 13:35:07 dkf Exp $
*/
#include "tkInt.h"
@@ -20,37 +20,36 @@
/*
* Implementation notes:
- *
- * Most of this file is independent of the text widget implementation
- * and representation now. Without much effort this could be developed
- * further into a new Tcl object type of which the Tk text widget is one
- * example of a client.
- *
+ *
+ * Most of this file is independent of the text widget implementation and
+ * representation now. Without much effort this could be developed further
+ * into a new Tcl object type of which the Tk text widget is one example of a
+ * client.
+ *
* The B-tree is set up with a dummy last line of text which must not be
- * displayed, and must _never_ have a non-zero pixel count. This dummy
- * line is a historical convenience to avoid other code having to deal
- * with NULL TkTextLines. Since Tk 8.5, with pixel line height
- * calculations and peer widgets, this dummy line is becoming somewhat
- * of a liability, and special case code has been required to deal with
- * it. It is probably a good idea to investigate removing the dummy
- * line completely. This could result in an overall simplification
- * (although it would require new special case code to deal with the
- * fact that '.text index end' would then not really point to a valid
- * line, rather it would point to the beginning of a non-existent line
+ * displayed, and must _never_ have a non-zero pixel count. This dummy line is
+ * a historical convenience to avoid other code having to deal with NULL
+ * TkTextLines. Since Tk 8.5, with pixel line height calculations and peer
+ * widgets, this dummy line is becoming somewhat of a liability, and special
+ * case code has been required to deal with it. It is probably a good idea to
+ * investigate removing the dummy line completely. This could result in an
+ * overall simplification (although it would require new special case code to
+ * deal with the fact that '.text index end' would then not really point to a
+ * valid line, rather it would point to the beginning of a non-existent line
* one beyond all current lines - we could perhaps define that as a
* TkTextIndex with a NULL TkTextLine ptr).
*/
/*
- * The data structure below keeps summary information about one tag as part
- * of the tag information in a node.
+ * The data structure below keeps summary information about one tag as part of
+ * the tag information in a node.
*/
typedef struct Summary {
TkTextTag *tagPtr; /* Handle for tag. */
- int toggleCount; /* Number of transitions into or
- * out of this tag that occur in
- * the subtree rooted at this node. */
+ int toggleCount; /* Number of transitions into or out
+ * of this tag that occur in the
+ * subtree rooted at this node. */
struct Summary *nextPtr; /* Next in list of all tags for same
* node, or NULL if at end of list. */
} Summary;
@@ -78,44 +77,43 @@ typedef struct Node {
int numChildren; /* Number of children of this node. */
int numLines; /* Total number of lines (leaves) in
* the subtree rooted here. */
- int* numPixels; /* Array containing total number
- * of vertical display pixels in
- * the subtree rooted here, one
- * entry for each peer widget. */
+ int* numPixels; /* Array containing total number of
+ * vertical display pixels in the
+ * subtree rooted here, one entry for
+ * each peer widget. */
} Node;
-/*
- * Used to avoid having to allocate and deallocate arrays on the
- * fly for commonly used procedures. Must be > 0.
+/*
+ * Used to avoid having to allocate and deallocate arrays on the fly for
+ * commonly used functions. Must be > 0.
*/
#define PIXEL_CLIENTS 5
/*
- * Upper and lower bounds on how many children a node may have:
- * rebalance when either of these limits is exceeded. MAX_CHILDREN
- * should be twice MIN_CHILDREN and MIN_CHILDREN must be >= 2.
+ * Upper and lower bounds on how many children a node may have: rebalance when
+ * either of these limits is exceeded. MAX_CHILDREN should be twice
+ * MIN_CHILDREN and MIN_CHILDREN must be >= 2.
*/
#define MAX_CHILDREN 12
#define MIN_CHILDREN 6
/*
- * The data structure below defines an entire B-tree. Since text
- * widgets are the only current B-tree clients, 'clients' and
- * 'pixelReferences' are identical.
+ * The data structure below defines an entire B-tree. Since text widgets are
+ * the only current B-tree clients, 'clients' and 'pixelReferences' are
+ * identical.
*/
typedef struct BTree {
Node *rootPtr; /* Pointer to root of B-tree. */
- int clients; /* Number of clients of this
- * B-tree */
- int pixelReferences; /* Number of clients of this
- * B-tree which care about
- * pixel heights */
- TkSharedText *sharedTextPtr; /* Used to find tagTable in consistency
- * checking code, and to access
- * list of all B-tree clients */
+ int clients; /* Number of clients of this B-tree */
+ int pixelReferences; /* Number of clients of this B-tree
+ * which care about pixel heights. */
+ TkSharedText *sharedTextPtr; /* Used to find tagTable in
+ * consistency checking code, and to
+ * access list of all B-tree
+ * clients. */
int startEndCount;
TkTextLine **startEnd;
TkText **startEndRef;
@@ -127,15 +125,15 @@ typedef struct BTree {
*/
typedef struct TagInfo {
- int numTags; /* Number of tags for which there
- * is currently information in
- * tags and counts. */
+ int numTags; /* Number of tags for which there is
+ * currently information in tags and
+ * counts. */
int arraySize; /* Number of entries allocated for
* tags and counts. */
TkTextTag **tagPtrs; /* Array of tags seen so far.
* Malloc-ed. */
int *counts; /* Toggle count (so far) for each
- * entry in tags. Malloc-ed. */
+ * entry in tags. Malloc-ed. */
} TagInfo;
/*
@@ -155,12 +153,12 @@ int tkBTreeDebug = 0;
+ sizeof(TkTextToggle)))
/*
- * Forward declarations for procedures defined in this file:
+ * Forward declarations for functions defined in this file:
*/
-static int AdjustPixelClient _ANSI_ARGS_((BTree *treePtr,
+static int AdjustPixelClient _ANSI_ARGS_((BTree *treePtr,
int defaultHeight, Node *nodePtr, TkTextLine *start,
- TkTextLine *end, int useReference,
+ TkTextLine *end, int useReference,
int newPixelReferences, int *counting));
static void ChangeNodeToggleCount _ANSI_ARGS_((Node *nodePtr,
TkTextTag *tagPtr, int delta));
@@ -173,18 +171,18 @@ static TkTextSegment * CharCleanupProc _ANSI_ARGS_((TkTextSegment *segPtr,
static TkTextSegment * CharSplitProc _ANSI_ARGS_((TkTextSegment *segPtr,
int index));
static void CheckNodeConsistency _ANSI_ARGS_((Node *nodePtr,
- int references));
+ int references));
static void CleanupLine _ANSI_ARGS_((TkTextLine *linePtr));
static void DeleteSummaries _ANSI_ARGS_((Summary *tagPtr));
static void DestroyNode _ANSI_ARGS_((Node *nodePtr));
-static TkTextSegment * FindTagEnd _ANSI_ARGS_((TkTextBTree tree,
+static TkTextSegment * FindTagEnd _ANSI_ARGS_((TkTextBTree tree,
TkTextTag *tagPtr, TkTextIndex *indexPtr));
static void IncCount _ANSI_ARGS_((TkTextTag *tagPtr, int inc,
TagInfo *tagInfoPtr));
static void Rebalance _ANSI_ARGS_((BTree *treePtr, Node *nodePtr));
-static void RecomputeNodeCounts _ANSI_ARGS_((BTree *treePtr,
- Node *nodePtr));
-static void RemovePixelClient _ANSI_ARGS_((BTree *treePtr,
+static void RecomputeNodeCounts _ANSI_ARGS_((BTree *treePtr,
+ Node *nodePtr));
+static void RemovePixelClient _ANSI_ARGS_((BTree *treePtr,
Node *nodePtr, int overwriteWithLast));
static TkTextSegment * SplitSeg _ANSI_ARGS_((TkTextIndex *indexPtr));
static void ToggleCheckProc _ANSI_ARGS_((TkTextSegment *segPtr,
@@ -197,60 +195,59 @@ static void ToggleLineChangeProc _ANSI_ARGS_((TkTextSegment *segPtr,
TkTextLine *linePtr));
static TkTextSegment * FindTagStart _ANSI_ARGS_((TkTextBTree tree,
TkTextTag *tagPtr, TkTextIndex *indexPtr));
-static void AdjustStartEndRefs _ANSI_ARGS_((BTree *treePtr,
+static void AdjustStartEndRefs _ANSI_ARGS_((BTree *treePtr,
TkText *textPtr, int action));
-/*
+/*
* Actions for use by AdjustStartEndRefs
*/
-#define TEXT_ADD_REFS 1
-#define TEXT_REMOVE_REFS 2
+
+#define TEXT_ADD_REFS 1
+#define TEXT_REMOVE_REFS 2
/*
* Type record for character segments:
*/
Tk_SegType tkTextCharType = {
- "character", /* name */
- 0, /* leftGravity */
- CharSplitProc, /* splitProc */
- CharDeleteProc, /* deleteProc */
- CharCleanupProc, /* cleanupProc */
- (Tk_SegLineChangeProc *) NULL, /* lineChangeProc */
- TkTextCharLayoutProc, /* layoutProc */
- CharCheckProc /* checkProc */
+ "character", /* name */
+ 0, /* leftGravity */
+ CharSplitProc, /* splitProc */
+ CharDeleteProc, /* deleteProc */
+ CharCleanupProc, /* cleanupProc */
+ NULL, /* lineChangeProc */
+ TkTextCharLayoutProc, /* layoutProc */
+ CharCheckProc /* checkProc */
};
/*
- * Type record for segments marking the beginning of a tagged
- * range:
+ * Type record for segments marking the beginning of a tagged range:
*/
Tk_SegType tkTextToggleOnType = {
- "toggleOn", /* name */
- 0, /* leftGravity */
- (Tk_SegSplitProc *) NULL, /* splitProc */
- ToggleDeleteProc, /* deleteProc */
- ToggleCleanupProc, /* cleanupProc */
- ToggleLineChangeProc, /* lineChangeProc */
- (Tk_SegLayoutProc *) NULL, /* layoutProc */
- ToggleCheckProc /* checkProc */
+ "toggleOn", /* name */
+ 0, /* leftGravity */
+ NULL, /* splitProc */
+ ToggleDeleteProc, /* deleteProc */
+ ToggleCleanupProc, /* cleanupProc */
+ ToggleLineChangeProc, /* lineChangeProc */
+ NULL, /* layoutProc */
+ ToggleCheckProc /* checkProc */
};
/*
- * Type record for segments marking the end of a tagged
- * range:
+ * Type record for segments marking the end of a tagged range:
*/
Tk_SegType tkTextToggleOffType = {
- "toggleOff", /* name */
- 1, /* leftGravity */
- (Tk_SegSplitProc *) NULL, /* splitProc */
- ToggleDeleteProc, /* deleteProc */
- ToggleCleanupProc, /* cleanupProc */
- ToggleLineChangeProc, /* lineChangeProc */
- (Tk_SegLayoutProc *) NULL, /* layoutProc */
- ToggleCheckProc /* checkProc */
+ "toggleOff", /* name */
+ 1, /* leftGravity */
+ NULL, /* splitProc */
+ ToggleDeleteProc, /* deleteProc */
+ ToggleCleanupProc, /* cleanupProc */
+ ToggleLineChangeProc, /* lineChangeProc */
+ NULL, /* layoutProc */
+ ToggleCheckProc /* checkProc */
};
/*
@@ -258,11 +255,11 @@ Tk_SegType tkTextToggleOffType = {
*
* TkBTreeCreate --
*
- * This procedure is called to create a new text B-tree.
+ * This function is called to create a new text B-tree.
*
* Results:
- * The return value is a pointer to a new B-tree containing
- * one line with nothing but a newline character.
+ * The return value is a pointer to a new B-tree containing one line with
+ * nothing but a newline character.
*
* Side effects:
* Memory is allocated and initialized.
@@ -278,18 +275,18 @@ TkBTreeCreate(sharedTextPtr)
register Node *rootPtr;
register TkTextLine *linePtr, *linePtr2;
register TkTextSegment *segPtr;
-
+
/*
- * The tree will initially have two empty lines. The second line
- * isn't actually part of the tree's contents, but its presence
- * makes several operations easier. The tree will have one node,
- * which is also the root of the tree.
+ * The tree will initially have two empty lines. The second line isn't
+ * actually part of the tree's contents, but its presence makes several
+ * operations easier. The tree will have one node, which is also the root
+ * of the tree.
*/
rootPtr = (Node *) ckalloc(sizeof(Node));
linePtr = (TkTextLine *) ckalloc(sizeof(TkTextLine));
linePtr2 = (TkTextLine *) ckalloc(sizeof(TkTextLine));
-
+
rootPtr->parentPtr = NULL;
rootPtr->nextPtr = NULL;
rootPtr->summaryPtr = NULL;
@@ -297,14 +294,16 @@ TkBTreeCreate(sharedTextPtr)
rootPtr->children.linePtr = linePtr;
rootPtr->numChildren = 2;
rootPtr->numLines = 2;
- /*
- * The tree currently has no registered clients, so all pixel
- * count pointers are simply NULL
+
+ /*
+ * The tree currently has no registered clients, so all pixel count
+ * pointers are simply NULL
*/
+
rootPtr->numPixels = NULL;
linePtr->pixels = NULL;
linePtr2->pixels = NULL;
-
+
linePtr->parentPtr = rootPtr;
linePtr->nextPtr = linePtr2;
segPtr = (TkTextSegment *) ckalloc(CSEG_SIZE(1));
@@ -314,7 +313,7 @@ TkBTreeCreate(sharedTextPtr)
segPtr->size = 1;
segPtr->body.chars[0] = '\n';
segPtr->body.chars[1] = 0;
-
+
linePtr2->parentPtr = rootPtr;
linePtr2->nextPtr = NULL;
segPtr = (TkTextSegment *) ckalloc(CSEG_SIZE(1));
@@ -333,7 +332,7 @@ TkBTreeCreate(sharedTextPtr)
treePtr->startEndCount = 0;
treePtr->startEnd = NULL;
treePtr->startEndRef = NULL;
-
+
return (TkTextBTree) treePtr;
}
@@ -342,28 +341,26 @@ TkBTreeCreate(sharedTextPtr)
*
* TkBTreeAddClient --
*
- * This procedure is called to provide a client with access to
- * a given B-tree. If the client wishes to make use of the
- * B-tree's pixel height storage, caching and calculation
- * mechanisms, then a non-negative 'defaultHeight' must be
- * provided. In this case the return value is a pixel tree
- * reference which must be provided in all of the B-tree API which
- * refers to or modifies pixel heights:
- *
- * TkBTreeAdjustPixelHeight,
+ * This function is called to provide a client with access to a given
+ * B-tree. If the client wishes to make use of the B-tree's pixel height
+ * storage, caching and calculation mechanisms, then a non-negative
+ * 'defaultHeight' must be provided. In this case the return value is a
+ * pixel tree reference which must be provided in all of the B-tree API
+ * which refers to or modifies pixel heights:
+ *
+ * TkBTreeAdjustPixelHeight,
* TkBTreeFindPixelLine,
- * TkBTreeNumPixels,
+ * TkBTreeNumPixels,
* TkBTreePixelsTo,
* (and two private functions AdjustPixelClient, RemovePixelClient).
- *
- * If this is not provided, then the above functions must
- * never be called for this client.
+ *
+ * If this is not provided, then the above functions must never be called
+ * for this client.
*
* Results:
- * The return value is the pixelReference used by the B-tree to
- * refer to pixel counts for the new client. It should be stored
- * by the caller. If defaultHeight was negative, then the return
- * value will be -1.
+ * The return value is the pixelReference used by the B-tree to refer to
+ * pixel counts for the new client. It should be stored by the caller.
+ * If defaultHeight was negative, then the return value will be -1.
*
* Side effects:
* Memory may be allocated and initialized.
@@ -373,14 +370,13 @@ TkBTreeCreate(sharedTextPtr)
void
TkBTreeAddClient(tree, textPtr, defaultHeight)
- TkTextBTree tree; /* B-tree to add a client to */
- TkText *textPtr; /* Client to add */
- int defaultHeight; /* Default line height for the new
- * client, or -1 if no pixel
- * heights are to be kept. */
+ TkTextBTree tree; /* B-tree to add a client to */
+ TkText *textPtr; /* Client to add */
+ int defaultHeight; /* Default line height for the new client, or
+ * -1 if no pixel heights are to be kept. */
{
register BTree *treePtr = (BTree*) tree;
-
+
if (treePtr == NULL) {
Tcl_Panic("NULL treePtr in TkBTreeAddClient");
}
@@ -393,19 +389,19 @@ TkBTreeAddClient(tree, textPtr, defaultHeight)
TkTextLine *end;
int counting = (textPtr->start == NULL ? 1 : 0);
int useReference = treePtr->pixelReferences;
- /*
- * We must set the 'end' value in AdjustPixelClient so that
- * the last dummy line in the B-tree doesn't contain
- * a pixel height.
+
+ /*
+ * We must set the 'end' value in AdjustPixelClient so that the last
+ * dummy line in the B-tree doesn't contain a pixel height.
*/
+
end = textPtr->end;
if (end == NULL) {
end = TkBTreeFindLine(tree, NULL, TkBTreeNumLines(tree, NULL));
}
- AdjustPixelClient(treePtr, defaultHeight, treePtr->rootPtr,
- textPtr->start, end, useReference,
- 1 + useReference, &counting);
-
+ AdjustPixelClient(treePtr, defaultHeight, treePtr->rootPtr,
+ textPtr->start, end, useReference, useReference+1, &counting);
+
textPtr->pixelReference = useReference;
treePtr->pixelReferences++;
} else {
@@ -419,48 +415,46 @@ TkBTreeAddClient(tree, textPtr, defaultHeight)
*
* TkBTreeClientRangeChanged --
*
- * Called when the -startline or -endline options of a text
- * widget client of the B-tree have changed.
+ * Called when the -startline or -endline options of a text widget client
+ * of the B-tree have changed.
*
* Results:
* None.
*
* Side effects:
- * Lots of processing of the B-tree is done, with potential
- * for memory to be allocated and initialized for the pixel
- * heights of the widget.
+ * Lots of processing of the B-tree is done, with potential for memory to
+ * be allocated and initialized for the pixel heights of the widget.
*
*----------------------------------------------------------------------
*/
void
TkBTreeClientRangeChanged(textPtr, defaultHeight)
- TkText *textPtr; /* Client whose start, end have
- * changed. */
- int defaultHeight; /* Default line height for the new
- * client, or -1 if no pixel
- * heights are to be kept. */
+ TkText *textPtr; /* Client whose start, end have changed. */
+ int defaultHeight; /* Default line height for the new client, or
+ * -1 if no pixel heights are to be kept. */
{
TkTextLine *end;
BTree *treePtr = (BTree*) textPtr->sharedTextPtr->tree;
-
+
int counting = (textPtr->start == NULL ? 1 : 0);
int useReference = textPtr->pixelReference;
AdjustStartEndRefs(treePtr, textPtr, TEXT_ADD_REFS | TEXT_REMOVE_REFS);
- /*
- * We must set the 'end' value in AdjustPixelClient so that
- * the last dummy line in the B-tree doesn't contain
- * a pixel height.
+
+ /*
+ * We must set the 'end' value in AdjustPixelClient so that the last dummy
+ * line in the B-tree doesn't contain a pixel height.
*/
+
end = textPtr->end;
if (end == NULL) {
- end = TkBTreeFindLine(textPtr->sharedTextPtr->tree,
+ end = TkBTreeFindLine(textPtr->sharedTextPtr->tree,
NULL, TkBTreeNumLines(textPtr->sharedTextPtr->tree, NULL));
}
AdjustPixelClient(treePtr, defaultHeight, treePtr->rootPtr,
- textPtr->start, end, useReference,
- treePtr->pixelReferences, &counting);
+ textPtr->start, end, useReference, treePtr->pixelReferences,
+ &counting);
}
/*
@@ -471,8 +465,7 @@ TkBTreeClientRangeChanged(textPtr, defaultHeight)
* Delete a B-tree, recycling all of the storage it contains.
*
* Results:
- * The tree is deleted, so 'tree' should never
- * again be used.
+ * The tree is deleted, so 'tree' should never again be used.
*
* Side effects:
* Memory is freed.
@@ -482,19 +475,19 @@ TkBTreeClientRangeChanged(textPtr, defaultHeight)
void
TkBTreeDestroy(tree)
- TkTextBTree tree; /* Tree to clean up */
+ TkTextBTree tree; /* Tree to clean up */
{
BTree *treePtr = (BTree *) tree;
- /*
+ /*
* There's no need to loop over each client of the tree, calling
- * 'TkBTreeRemoveClient', since the 'DestroyNode' will clean
- * everything up itself.
+ * 'TkBTreeRemoveClient', since the 'DestroyNode' will clean everything up
+ * itself.
*/
-
+
DestroyNode(treePtr->rootPtr);
if (treePtr->startEnd != NULL) {
- ckfree((char *) treePtr->startEnd);
+ ckfree((char *) treePtr->startEnd);
ckfree((char *) treePtr->startEndRef);
}
ckfree((char *) treePtr);
@@ -505,14 +498,14 @@ TkBTreeDestroy(tree)
*
* TkBTreeRemoveClient --
*
- * Remove a client widget from its B-tree, cleaning up the pixel
- * arrays which it uses if necessary. If this is the last such
- * widget, we also destroy the whole tree.
+ * Remove a client widget from its B-tree, cleaning up the pixel arrays
+ * which it uses if necessary. If this is the last such widget, we also
+ * destroy the whole tree.
*
* Results:
- * All tree-specific aspects of the given client are deleted.
- * If no more references exist, then the given tree is also
- * deleted (in which case 'tree' must not be used again).
+ * All tree-specific aspects of the given client are deleted. If no more
+ * references exist, then the given tree is also deleted (in which case
+ * 'tree' must not be used again).
*
* Side effects:
* Memory may be freed.
@@ -522,45 +515,55 @@ TkBTreeDestroy(tree)
void
TkBTreeRemoveClient(tree, textPtr)
- TkTextBTree tree; /* Tree to remove client from */
- TkText *textPtr; /* Client to remove. */
+ TkTextBTree tree; /* Tree to remove client from. */
+ TkText *textPtr; /* Client to remove. */
{
BTree *treePtr = (BTree *) tree;
int pixelReference = textPtr->pixelReference;
-
+
if (treePtr->clients == 1) {
- /* The last reference to the tree */
+ /*
+ * The last reference to the tree.
+ */
+
DestroyNode(treePtr->rootPtr);
ckfree((char *) treePtr);
return;
} else if (pixelReference == -1) {
- /* A client which doesn't care about pixels */
+ /*
+ * A client which doesn't care about pixels.
+ */
+
treePtr->clients--;
} else {
- /* Clean up pixel data for the given reference */
-
+ /*
+ * Clean up pixel data for the given reference.
+ */
+
if (pixelReference == (treePtr->pixelReferences-1)) {
- /*
- * The widget we're removing has the last index,
- * so deletion is easier.
+ /*
+ * The widget we're removing has the last index, so deletion is
+ * easier.
*/
+
RemovePixelClient(treePtr, treePtr->rootPtr, -1);
} else {
TkText *adjustPtr;
-
+
RemovePixelClient(treePtr, treePtr->rootPtr, pixelReference);
- /*
- * Now we need to adjust the 'pixelReference' of the
- * peer widget whose storage we've just moved.
+ /*
+ * Now we need to adjust the 'pixelReference' of the peer widget
+ * whose storage we've just moved.
*/
+
adjustPtr = treePtr->sharedTextPtr->peers;
while (adjustPtr != NULL) {
- if (adjustPtr->pixelReference == (treePtr->pixelReferences-1)) {
+ if (adjustPtr->pixelReference == (treePtr->pixelReferences-1)) {
adjustPtr->pixelReference = pixelReference;
- break;
- }
- adjustPtr = adjustPtr->next;
+ break;
+ }
+ adjustPtr = adjustPtr->next;
}
if (adjustPtr == NULL) {
Tcl_Panic("Couldn't find text widget with correct reference");
@@ -569,7 +572,7 @@ TkBTreeRemoveClient(tree, textPtr)
treePtr->pixelReferences--;
treePtr->clients--;
}
-
+
if (textPtr->start != NULL || textPtr->end != NULL) {
AdjustStartEndRefs(treePtr, textPtr, TEXT_REMOVE_REFS);
}
@@ -580,25 +583,23 @@ TkBTreeRemoveClient(tree, textPtr)
*
* AdjustStartEndRefs --
*
- * Modify B-tree's cache of start, end lines for the given text
- * widget.
+ * Modify B-tree's cache of start, end lines for the given text widget.
*
* Results:
* None.
*
* Side effects:
- * The number of cached items may change
- * (treePtr->startEndCount).
+ * The number of cached items may change (treePtr->startEndCount).
*
*----------------------------------------------------------------------
*/
static void
-AdjustStartEndRefs(treePtr, textPtr, action)
- BTree *treePtr; /* The entire B-tree */
- TkText *textPtr; /* The text widget for which we want to
- * adjust it's start and end cache. */
- int action; /* Action to perform */
+AdjustStartEndRefs(treePtr, textPtr, action)
+ BTree *treePtr; /* The entire B-tree */
+ TkText *textPtr; /* The text widget for which we want to adjust
+ * it's start and end cache. */
+ int action; /* Action to perform */
{
if (action & TEXT_REMOVE_REFS) {
int i = 0;
@@ -610,30 +611,38 @@ AdjustStartEndRefs(treePtr, textPtr, action)
treePtr->startEndRef[count] = treePtr->startEndRef[i];
}
if (treePtr->startEndRef[i] != textPtr) {
- count++;
+ count++;
}
i++;
}
treePtr->startEndCount = count;
- treePtr->startEnd = (TkTextLine**)ckrealloc((char*)treePtr->startEnd,
- sizeof(TkTextLine*)*count);
- treePtr->startEndRef = (TkText**)ckrealloc((char*)treePtr->startEndRef,
- sizeof(TkText*)*count);
- }
- if ((action & TEXT_ADD_REFS)
- && (textPtr->start != NULL || textPtr->end != NULL)) {
+ treePtr->startEnd = (TkTextLine **)
+ ckrealloc((char *) treePtr->startEnd,
+ sizeof(TkTextLine *) * count);
+ treePtr->startEndRef = (TkText **)
+ ckrealloc((char *) treePtr->startEndRef,
+ sizeof(TkText *) * count);
+ }
+ if ((action & TEXT_ADD_REFS)
+ && (textPtr->start != NULL || textPtr->end != NULL)) {
int count;
- if (textPtr->start != NULL) treePtr->startEndCount++;
- if (textPtr->end != NULL) treePtr->startEndCount++;
+ if (textPtr->start != NULL) {
+ treePtr->startEndCount++;
+ }
+ if (textPtr->end != NULL) {
+ treePtr->startEndCount++;
+ }
count = treePtr->startEndCount;
-
- treePtr->startEnd = (TkTextLine**)ckrealloc((char*)treePtr->startEnd,
- sizeof(TkTextLine*)*count);
- treePtr->startEndRef = (TkText**)ckrealloc((char*)treePtr->startEndRef,
- sizeof(TkText*)*count);
-
+
+ treePtr->startEnd = (TkTextLine **)
+ ckrealloc((char *) treePtr->startEnd,
+ sizeof(TkTextLine *) * count);
+ treePtr->startEndRef = (TkText **)
+ ckrealloc((char *) treePtr->startEndRef,
+ sizeof(TkText *) * count);
+
if (textPtr->start != NULL) {
count--;
treePtr->startEnd[count] = textPtr->start;
@@ -652,69 +661,60 @@ AdjustStartEndRefs(treePtr, textPtr, action)
*
* AdjustPixelClient --
*
- * Utility procedure used to update all data structures for the
- * existence of a new peer widget based on this B-tree, or for
- * the modification of the start, end lines of an existing peer
- * widget.
- *
+ * Utility function used to update all data structures for the existence
+ * of a new peer widget based on this B-tree, or for the modification of
+ * the start, end lines of an existing peer widget.
+ *
* Immediately _after_ calling this, treePtr->clients and
- * treePtr->pixelReferences should be adjusted if needed (i.e.
- * if this is a new peer).
+ * treePtr->pixelReferences should be adjusted if needed (i.e. if this is
+ * a new peer).
*
* Results:
* None.
*
* Side effects:
- * All the storage for Nodes and TkTextLines in the tree may
- * be adjusted.
+ * All the storage for Nodes and TkTextLines in the tree may be adjusted.
*
*----------------------------------------------------------------------
*/
static int
-AdjustPixelClient(treePtr, defaultHeight, nodePtr, start, end,
- useReference, newPixelReferences, counting)
- BTree *treePtr; /* Pointer to tree */
- int defaultHeight; /* Default pixel line
- * height, which can be zero. */
- Node *nodePtr; /* Adjust from this node
- * downwards */
- TkTextLine *start; /* First line for this pixel
- * client */
- TkTextLine *end; /* Last line for this pixel
- * client */
- int useReference; /* pixel reference for the
- * client we are adding or
- * changing */
- int newPixelReferences; /* New number of pixel
- * references to this B-tree */
- int *counting; /* References an integer which
- * is zero if we're outside the
- * relevant range for this
- * client, and 1 if we're
- * inside. */
+AdjustPixelClient(treePtr, defaultHeight, nodePtr, start, end,
+ useReference, newPixelReferences, counting)
+ BTree *treePtr; /* Pointer to tree */
+ int defaultHeight; /* Default pixel line height, which can be
+ * zero. */
+ Node *nodePtr; /* Adjust from this node downwards */
+ TkTextLine *start; /* First line for this pixel client */
+ TkTextLine *end; /* Last line for this pixel client */
+ int useReference; /* pixel reference for the client we are
+ * adding or changing */
+ int newPixelReferences; /* New number of pixel references to this
+ * B-tree */
+ int *counting; /* References an integer which is zero if
+ * we're outside the relevant range for this
+ * client, and 1 if we're inside. */
{
int pixelCount = 0;
/*
- * Traverse entire tree down from nodePtr, reallocating pixel
- * structures for each Node and TkTextLine, adding room for the new
- * peer's pixel information (1 extra int per Node, 2 extra ints per
- * TkTextLine). Also copy the information from the last peer into
- * the new space (so it contains something sensible).
+ * Traverse entire tree down from nodePtr, reallocating pixel structures
+ * for each Node and TkTextLine, adding room for the new peer's pixel
+ * information (1 extra int per Node, 2 extra ints per TkTextLine). Also
+ * copy the information from the last peer into the new space (so it
+ * contains something sensible).
*/
-
+
if (nodePtr->level != 0) {
Node *loopPtr = nodePtr->children.nodePtr;
while (loopPtr != NULL) {
pixelCount += AdjustPixelClient(treePtr, defaultHeight, loopPtr,
- start, end, useReference,
- newPixelReferences, counting);
+ start, end, useReference, newPixelReferences, counting);
loopPtr = loopPtr->nextPtr;
}
} else {
register TkTextLine *linePtr = nodePtr->children.linePtr;
-
+
while (linePtr != NULL) {
if (!*counting && (linePtr == start)) {
*counting = 1;
@@ -723,24 +723,25 @@ AdjustPixelClient(treePtr, defaultHeight, nodePtr, start, end,
*counting = 0;
}
if (newPixelReferences != treePtr->pixelReferences) {
- linePtr->pixels = (int*)ckrealloc((char*)linePtr->pixels,
- sizeof(int)*2*newPixelReferences);
+ linePtr->pixels = (int *) ckrealloc((char *) linePtr->pixels,
+ sizeof(int) * 2 * newPixelReferences);
}
- /*
- * Notice that for the very last line, we are never counting
- * and therefore this always has a height of 0 and an epoch
- * of 1.
+
+ /*
+ * Notice that for the very last line, we are never counting and
+ * therefore this always has a height of 0 and an epoch of 1.
*/
+
linePtr->pixels[2*useReference] = (*counting ? defaultHeight : 0);
linePtr->pixels[1+2*useReference] = (*counting ? 0 : 1);
pixelCount += linePtr->pixels[2*useReference];
-
+
linePtr = linePtr->nextPtr;
}
}
if (newPixelReferences != treePtr->pixelReferences) {
- nodePtr->numPixels = (int*)ckrealloc((char*)nodePtr->numPixels,
- sizeof(int)*newPixelReferences);
+ nodePtr->numPixels = (int *) ckrealloc((char *) nodePtr->numPixels,
+ sizeof(int) * newPixelReferences);
}
nodePtr->numPixels[useReference] = pixelCount;
return pixelCount;
@@ -751,48 +752,45 @@ AdjustPixelClient(treePtr, defaultHeight, nodePtr, start, end,
*
* RemovePixelClient --
*
- * Utility procedure used to update all data structures for the
- * removal of a peer widget which used to be based on this B-tree.
- *
- * Immediately _after_ calling this, treePtr->clients should
- * be decremented.
+ * Utility function used to update all data structures for the removal of
+ * a peer widget which used to be based on this B-tree.
+ *
+ * Immediately _after_ calling this, treePtr->clients should be
+ * decremented.
*
* Results:
* None.
*
* Side effects:
- * All the storage for Nodes and TkTextLines in the tree may
- * be adjusted.
+ * All the storage for Nodes and TkTextLines in the tree may be adjusted.
*
*----------------------------------------------------------------------
*/
static void
RemovePixelClient(treePtr, nodePtr, overwriteWithLast)
- BTree *treePtr; /* Pointer to tree */
- Node *nodePtr; /* Adjust from this node
- * downwards */
- int overwriteWithLast; /* Over-write this peer widget's
- * information with the last one
- */
+ BTree *treePtr; /* Pointer to tree */
+ Node *nodePtr; /* Adjust from this node downwards */
+ int overwriteWithLast; /* Over-write this peer widget's information
+ * with the last one. */
{
/*
- * Traverse entire tree down from nodePtr, reallocating pixel
- * structures for each Node and TkTextLine, removing space allocated
- * for one peer. If 'overwriteWithLast' is not -1, then copy the
- * information which was in the last slot on top of one of the
- * others (i.e. it's not the last one we're deleting).
+ * Traverse entire tree down from nodePtr, reallocating pixel structures
+ * for each Node and TkTextLine, removing space allocated for one peer.
+ * If 'overwriteWithLast' is not -1, then copy the information which was
+ * in the last slot on top of one of the others (i.e. it's not the last
+ * one we're deleting).
*/
if (overwriteWithLast != -1) {
- nodePtr->numPixels[overwriteWithLast]
- = nodePtr->numPixels[treePtr->pixelReferences-1];
+ nodePtr->numPixels[overwriteWithLast] =
+ nodePtr->numPixels[treePtr->pixelReferences-1];
}
if (treePtr->pixelReferences == 1) {
nodePtr->numPixels = NULL;
} else {
- nodePtr->numPixels = (int*)ckrealloc((char*)nodePtr->numPixels,
- sizeof(int)*(treePtr->pixelReferences-1));
+ nodePtr->numPixels = (int *) ckrealloc((char *) nodePtr->numPixels,
+ sizeof(int) * (treePtr->pixelReferences - 1));
}
if (nodePtr->level != 0) {
nodePtr = nodePtr->children.nodePtr;
@@ -804,16 +802,16 @@ RemovePixelClient(treePtr, nodePtr, overwriteWithLast)
register TkTextLine *linePtr = nodePtr->children.linePtr;
while (linePtr != NULL) {
if (overwriteWithLast != -1) {
- linePtr->pixels[2*overwriteWithLast]
- = linePtr->pixels[2*(treePtr->pixelReferences-1)];
- linePtr->pixels[1+2*overwriteWithLast]
- = linePtr->pixels[1+2*(treePtr->pixelReferences-1)];
+ linePtr->pixels[2*overwriteWithLast] =
+ linePtr->pixels[2*(treePtr->pixelReferences-1)];
+ linePtr->pixels[1+2*overwriteWithLast] =
+ linePtr->pixels[1+2*(treePtr->pixelReferences-1)];
}
if (treePtr->pixelReferences == 1) {
linePtr->pixels = NULL;
} else {
- linePtr->pixels = (int*)ckrealloc((char*)linePtr->pixels,
- sizeof(int)*2*(treePtr->pixelReferences-1));
+ linePtr->pixels = (int *) ckrealloc((char *) linePtr->pixels,
+ sizeof(int) * 2 * (treePtr->pixelReferences-1));
}
linePtr = linePtr->nextPtr;
}
@@ -825,8 +823,8 @@ RemovePixelClient(treePtr, nodePtr, overwriteWithLast)
*
* DestroyNode --
*
- * This is a recursive utility procedure used during the deletion
- * of a B-tree.
+ * This is a recursive utility function used during the deletion of a
+ * B-tree.
*
* Results:
* None.
@@ -839,7 +837,7 @@ RemovePixelClient(treePtr, nodePtr, overwriteWithLast)
static void
DestroyNode(nodePtr)
- register Node *nodePtr; /* Destroy from this node downwards */
+ register Node *nodePtr; /* Destroy from this node downwards */
{
if (nodePtr->level == 0) {
TkTextLine *linePtr;
@@ -875,8 +873,8 @@ DestroyNode(nodePtr)
*
* DeleteSummaries --
*
- * Free up all of the memory in a list of tag summaries associated
- * with a node.
+ * Free up all of the memory in a list of tag summaries associated with a
+ * node.
*
* Results:
* None.
@@ -889,8 +887,8 @@ DestroyNode(nodePtr)
static void
DeleteSummaries(summaryPtr)
- register Summary *summaryPtr; /* First in list of node's tag
- * summaries. */
+ register Summary *summaryPtr;
+ /* First in list of node's tag summaries. */
{
register Summary *nextPtr;
while (summaryPtr != NULL) {
@@ -905,67 +903,65 @@ DeleteSummaries(summaryPtr)
*
* TkBTreeAdjustPixelHeight --
*
- * Adjust the pixel height of a given logical line to the
- * specified value.
+ * Adjust the pixel height of a given logical line to the specified
+ * value.
*
* Results:
* Total number of valid pixels currently known in the tree.
*
* Side effects:
- * Updates overall data structures so pixel height count is
- * consistent.
+ * Updates overall data structures so pixel height count is consistent.
*
*----------------------------------------------------------------------
*/
int
TkBTreeAdjustPixelHeight(textPtr, linePtr, newPixelHeight, mergedLogicalLines)
- CONST TkText *textPtr; /* Client of the B-tree */
- register TkTextLine *linePtr; /* The logical line to update */
- int newPixelHeight; /* The line's known height
- * in pixels */
- int mergedLogicalLines; /* The number of extra logical
- * lines which have been merged
- * with this one (due to elided
- * eols). They will have their
- * pixel height set to zero, and
- * the total pixel height
- * associated with the given
- * linePtr. */
+ CONST TkText *textPtr; /* Client of the B-tree */
+ register TkTextLine *linePtr;
+ /* The logical line to update. */
+ int newPixelHeight; /* The line's known height in pixels. */
+ int mergedLogicalLines; /* The number of extra logical lines which
+ * have been merged with this one (due to
+ * elided eols). They will have their pixel
+ * height set to zero, and the total pixel
+ * height associated with the given linePtr */
{
register Node *nodePtr;
- int changeToPixelCount; /* Counts change to total number of
- * pixels in file. */
+ int changeToPixelCount; /* Counts change to total number of pixels in
+ * file. */
int pixelReference = textPtr->pixelReference;
-
+
changeToPixelCount = newPixelHeight - linePtr->pixels[2*pixelReference];
/*
- * Increment the pixel counts in all the parent nodes of the
- * current line, then rebalance the tree if necessary.
+ * Increment the pixel counts in all the parent nodes of the current line,
+ * then rebalance the tree if necessary.
*/
nodePtr = linePtr->parentPtr;
nodePtr->numPixels[pixelReference] += changeToPixelCount;
-
+
while (nodePtr->parentPtr != NULL) {
nodePtr = nodePtr->parentPtr;
nodePtr->numPixels[pixelReference] += changeToPixelCount;
}
linePtr->pixels[2*pixelReference] = newPixelHeight;
-
- /*
- * Any merged logical lines must have their height set to zero.
+
+ /*
+ * Any merged logical lines must have their height set to zero.
*/
+
while (mergedLogicalLines-- > 0) {
- linePtr = TkBTreeNextLine(textPtr, linePtr);
+ linePtr = TkBTreeNextLine(textPtr, linePtr);
TkBTreeAdjustPixelHeight(textPtr, linePtr, 0, 0);
}
-
+
/*
* Return total number of pixels in the tree.
*/
+
return nodePtr->numPixels[pixelReference];
}
@@ -980,69 +976,67 @@ TkBTreeAdjustPixelHeight(textPtr, linePtr, newPixelHeight, mergedLogicalLines)
* None.
*
* Side effects:
- * Characters are added to the B-tree at the given position.
- * If the string contains newlines, new lines will be added,
- * which could cause the structure of the B-tree to change.
+ * Characters are added to the B-tree at the given position. If the
+ * string contains newlines, new lines will be added, which could cause
+ * the structure of the B-tree to change.
*
*----------------------------------------------------------------------
*/
void
TkBTreeInsertChars(tree, indexPtr, string)
- TkTextBTree tree; /* Tree to insert into */
- register TkTextIndex *indexPtr; /* Indicates where to insert text.
- * When the procedure returns, this
- * index is no longer valid because
- * of changes to the segment
- * structure. */
- CONST char *string; /* Pointer to bytes to insert (may
- * contain newlines, must be null-
- * terminated). */
+ TkTextBTree tree; /* Tree to insert into */
+ register TkTextIndex *indexPtr;
+ /* Indicates where to insert text. When the
+ * function returns, this index is no longer
+ * valid because of changes to the segment
+ * structure. */
+ CONST char *string; /* Pointer to bytes to insert (may contain
+ * newlines, must be null-terminated). */
{
register Node *nodePtr;
- register TkTextSegment *prevPtr; /* The segment just before the first
- * new segment (NULL means new segment
- * is at beginning of line). */
- TkTextSegment *curPtr; /* Current segment; new characters
- * are inserted just after this one.
- * NULL means insert at beginning of
- * line. */
- TkTextLine *linePtr; /* Current line (new segments are
- * added to this line). */
+ register TkTextSegment *prevPtr;
+ /* The segment just before the first new
+ * segment (NULL means new segment is at
+ * beginning of line). */
+ TkTextSegment *curPtr; /* Current segment; new characters are
+ * inserted just after this one. NULL means
+ * insert at beginning of line. */
+ TkTextLine *linePtr; /* Current line (new segments are added to
+ * this line). */
register TkTextSegment *segPtr;
TkTextLine *newLinePtr;
- int chunkSize; /* # characters in current chunk. */
- register CONST char *eol; /* Pointer to character just after last
- * one in current chunk. */
- int changeToLineCount; /* Counts change to total number of
- * lines in file. */
- int *changeToPixelCount; /* Counts change to total number of
- * pixels in file. */
+ int chunkSize; /* # characters in current chunk. */
+ register CONST char *eol; /* Pointer to character just after last one in
+ * current chunk. */
+ int changeToLineCount; /* Counts change to total number of lines in
+ * file. */
+ int *changeToPixelCount; /* Counts change to total number of pixels in
+ * file. */
int ref;
int pixels[PIXEL_CLIENTS];
-
+
BTree *treePtr = (BTree*)tree;
prevPtr = SplitSeg(indexPtr);
linePtr = indexPtr->linePtr;
curPtr = prevPtr;
/*
- * Chop the string up into lines and create a new segment for
- * each line, plus a new line for the leftovers from the
- * previous line.
+ * Chop the string up into lines and create a new segment for each line,
+ * plus a new line for the leftovers from the previous line.
*/
changeToLineCount = 0;
if (treePtr->pixelReferences > PIXEL_CLIENTS) {
- changeToPixelCount = (int*) ckalloc(sizeof(int) *
- treePtr->pixelReferences);
+ changeToPixelCount = (int *)
+ ckalloc(sizeof(int) * treePtr->pixelReferences);
} else {
changeToPixelCount = pixels;
}
for (ref = 0; ref < treePtr->pixelReferences; ref++) {
changeToPixelCount[ref] = 0;
}
-
+
while (*string != 0) {
for (eol = string; *eol != 0; eol++) {
if (*eol == '\n') {
@@ -1069,22 +1063,24 @@ TkBTreeInsertChars(tree, indexPtr, string)
}
/*
- * The chunk ended with a newline, so create a new TkTextLine
- * and move the remainder of the old line to it.
+ * The chunk ended with a newline, so create a new TkTextLine and move
+ * the remainder of the old line to it.
*/
newLinePtr = (TkTextLine *) ckalloc(sizeof(TkTextLine));
- newLinePtr->pixels =
- (int*) ckalloc(sizeof(int)*2*treePtr->pixelReferences);
-
+ newLinePtr->pixels = (int *)
+ ckalloc(sizeof(int)*2*treePtr->pixelReferences);
+
newLinePtr->parentPtr = linePtr->parentPtr;
newLinePtr->nextPtr = linePtr->nextPtr;
linePtr->nextPtr = newLinePtr;
newLinePtr->segPtr = segPtr->nextPtr;
+
/*
- * Set up a starting default height, which will be re-adjusted
+ * Set up a starting default height, which will be re-adjusted
* later. We need to do this for each referenced widget
*/
+
for (ref = 0; ref < treePtr->pixelReferences; ref++) {
newLinePtr->pixels[2*ref] = linePtr->pixels[2*ref];
newLinePtr->pixels[1+2*ref] = 0;
@@ -1095,30 +1091,30 @@ TkBTreeInsertChars(tree, indexPtr, string)
linePtr = newLinePtr;
curPtr = NULL;
changeToLineCount++;
-
+
string = eol;
}
/*
- * I don't believe it's possible for either of the two lines
- * passed to this function to be the last line of text, but
- * the function is robust to that case anyway. (We must never
- * re-calculated the line height of the last line).
+ * I don't believe it's possible for either of the two lines passed to
+ * this function to be the last line of text, but the function is robust
+ * to that case anyway. (We must never re-calculated the line height of
+ * the last line).
*/
- TkTextInvalidateLineMetrics(treePtr->sharedTextPtr, NULL,
- indexPtr->linePtr, changeToLineCount,
- TK_TEXT_INVALIDATE_INSERT);
+
+ TkTextInvalidateLineMetrics(treePtr->sharedTextPtr, NULL,
+ indexPtr->linePtr, changeToLineCount, TK_TEXT_INVALIDATE_INSERT);
/*
- * Cleanup the starting line for the insertion, plus the ending
- * line if it's different.
+ * Cleanup the starting line for the insertion, plus the ending line if
+ * it's different.
*/
CleanupLine(indexPtr->linePtr);
if (linePtr != indexPtr->linePtr) {
CleanupLine(linePtr);
}
-
+
/*
* Increment the line and pixel counts in all the parent nodes of the
* insertion point, then rebalance the tree if necessary.
@@ -1134,7 +1130,7 @@ TkBTreeInsertChars(tree, indexPtr, string)
if (treePtr->pixelReferences > PIXEL_CLIENTS) {
ckfree((char*)changeToPixelCount);
}
-
+
nodePtr = linePtr->parentPtr;
nodePtr->numChildren += changeToLineCount;
if (nodePtr->numChildren > MAX_CHILDREN) {
@@ -1151,42 +1147,40 @@ TkBTreeInsertChars(tree, indexPtr, string)
*
* SplitSeg --
*
- * This procedure is called before adding or deleting
- * segments. It does three things: (a) it finds the segment
- * containing indexPtr; (b) if there are several such
- * segments (because some segments have zero length) then
- * it picks the first segment that does not have left
- * gravity; (c) if the index refers to the middle of
- * a segment then it splits the segment so that the
- * index now refers to the beginning of a segment.
+ * This function is called before adding or deleting segments. It does
+ * three things: (a) it finds the segment containing indexPtr; (b) if
+ * there are several such segments (because some segments have zero
+ * length) then it picks the first segment that does not have left
+ * gravity; (c) if the index refers to the middle of a segment then it
+ * splits the segment so that the index now refers to the beginning of a
+ * segment.
*
* Results:
- * The return value is a pointer to the segment just
- * before the segment corresponding to indexPtr (as
- * described above). If the segment corresponding to
- * indexPtr is the first in its line then the return
+ * The return value is a pointer to the segment just before the segment
+ * corresponding to indexPtr (as described above). If the segment
+ * corresponding to indexPtr is the first in its line then the return
* value is NULL.
*
* Side effects:
- * The segment referred to by indexPtr is split unless
- * indexPtr refers to its first character.
+ * The segment referred to by indexPtr is split unless indexPtr refers to
+ * its first character.
*
*--------------------------------------------------------------
*/
static TkTextSegment *
SplitSeg(indexPtr)
- TkTextIndex *indexPtr; /* Index identifying position
- * at which to split a segment. */
+ TkTextIndex *indexPtr; /* Index identifying position at which to
+ * split a segment. */
{
TkTextSegment *prevPtr, *segPtr;
TkTextLine *linePtr;
-
+
int count = indexPtr->byteIndex;
linePtr = indexPtr->linePtr;
prevPtr = NULL;
segPtr = linePtr->segPtr;
-
+
while (segPtr != NULL) {
if (segPtr->size > count) {
if (count == 0) {
@@ -1203,15 +1197,16 @@ SplitSeg(indexPtr)
&& !segPtr->typePtr->leftGravity) {
return prevPtr;
}
-
+
count -= segPtr->size;
prevPtr = segPtr;
segPtr = segPtr->nextPtr;
if (segPtr == NULL) {
- /*
- * Two logical lines merged into one display line
- * through eliding of a newline
+ /*
+ * Two logical lines merged into one display line through eliding
+ * of a newline
*/
+
linePtr = TkBTreeNextLine(NULL, linePtr);
if (linePtr == NULL) {
/* Reached end of the text */
@@ -1228,17 +1223,16 @@ SplitSeg(indexPtr)
*
* CleanupLine --
*
- * This procedure is called after modifications have been
- * made to a line. It scans over all of the segments in
- * the line, giving each a chance to clean itself up, e.g.
- * by merging with the following segments, updating internal
- * information, etc.
+ * This function is called after modifications have been made to a line.
+ * It scans over all of the segments in the line, giving each a chance to
+ * clean itself up, e.g. by merging with the following segments, updating
+ * internal information, etc.
*
* Results:
* None.
*
* Side effects:
- * Depends on what the segment-specific cleanup procedures do.
+ * Depends on what the segment-specific cleanup functions do.
*
*--------------------------------------------------------------
*/
@@ -1251,13 +1245,12 @@ CleanupLine(linePtr)
int anyChanges;
/*
- * Make a pass over all of the segments in the line, giving each
- * a chance to clean itself up. This could potentially change
- * the structure of the line, e.g. by merging two segments
- * together or having two segments cancel themselves; if so,
- * then repeat the whole process again, since the first structure
- * change might make other structure changes possible. Repeat
- * until eventually there are no changes.
+ * Make a pass over all of the segments in the line, giving each a chance
+ * to clean itself up. This could potentially change the structure of the
+ * line, e.g. by merging two segments together or having two segments
+ * cancel themselves; if so, then repeat the whole process again, since
+ * the first structure change might make other structure changes possible.
+ * Repeat until eventually there are no changes.
*/
while (1) {
@@ -1283,45 +1276,45 @@ CleanupLine(linePtr)
*
* TkBTreeDeleteChars --
*
- * Delete a range of characters from a B-tree. The caller
- * must make sure that the final newline of the B-tree is
- * never deleted.
+ * Delete a range of characters from a B-tree. The caller must make sure
+ * that the final newline of the B-tree is never deleted.
*
* Results:
* None.
*
* Side effects:
- * Information is deleted from the B-tree. This can cause the
- * internal structure of the B-tree to change. Note: because
- * of changes to the B-tree structure, the indices pointed
- * to by index1Ptr and index2Ptr should not be used after this
- * procedure returns.
+ * Information is deleted from the B-tree. This can cause the internal
+ * structure of the B-tree to change. Note: because of changes to the
+ * B-tree structure, the indices pointed to by index1Ptr and index2Ptr
+ * should not be used after this function returns.
*
*----------------------------------------------------------------------
*/
void
TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
- TkTextBTree tree; /* Tree to delete from */
- register TkTextIndex *index1Ptr; /* Indicates first character that is
- * to be deleted. */
- register TkTextIndex *index2Ptr; /* Indicates character just after the
- * last one that is to be deleted. */
+ TkTextBTree tree; /* Tree to delete from */
+ register TkTextIndex *index1Ptr;
+ /* Indicates first character that is to be
+ * deleted. */
+ register TkTextIndex *index2Ptr;
+ /* Indicates character just after the last one
+ * that is to be deleted. */
{
- TkTextSegment *prevPtr; /* The segment just before the start
- * of the deletion range. */
- TkTextSegment *lastPtr; /* The segment just after the end
- * of the deletion range. */
+ TkTextSegment *prevPtr; /* The segment just before the start of the
+ * deletion range. */
+ TkTextSegment *lastPtr; /* The segment just after the end of the
+ * deletion range. */
TkTextSegment *segPtr, *nextPtr;
TkTextLine *curLinePtr;
Node *curNodePtr, *nodePtr;
int changeToLineCount = 0;
int ref;
BTree *treePtr = (BTree*)tree;
-
+
/*
- * Tricky point: split at index2Ptr first; otherwise the split
- * at index2Ptr may invalidate segPtr and/or prevPtr.
+ * Tricky point: split at index2Ptr first; otherwise the split at
+ * index2Ptr may invalidate segPtr and/or prevPtr.
*/
lastPtr = SplitSeg(index2Ptr);
@@ -1351,9 +1344,9 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
TkTextLine *nextLinePtr;
/*
- * We just ran off the end of a line. First find the
- * next line, then go back to the old line and delete it
- * (unless it's the starting line for the range).
+ * We just ran off the end of a line. First find the next line,
+ * then go back to the old line and delete it (unless it's the
+ * starting line for the range).
*/
nextLinePtr = TkBTreeNextLine(NULL, curLinePtr);
@@ -1372,17 +1365,24 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
}
changeToLineCount++;
curNodePtr->numChildren--;
- /* Check if we need to adjust any partial clients */
+
+ /*
+ * Check if we need to adjust any partial clients.
+ */
+
if (treePtr->startEnd != NULL) {
int checkCount = 0;
+
while (checkCount < treePtr->startEndCount) {
if (treePtr->startEnd[checkCount] == curLinePtr) {
TkText *peer = treePtr->startEndRef[checkCount];
- /*
- * We're deleting a line which is the start
- * or end of a current client. This means
- * we need to adjust that client.
+
+ /*
+ * We're deleting a line which is the start or end
+ * of a current client. This means we need to
+ * adjust that client.
*/
+
treePtr->startEnd[checkCount] = nextLinePtr;
if (peer->start == curLinePtr) {
peer->start = nextLinePtr;
@@ -1429,8 +1429,8 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
nextPtr = segPtr->nextPtr;
if ((*segPtr->typePtr->deleteProc)(segPtr, curLinePtr, 0) != 0) {
/*
- * This segment refuses to die. Move it to prevPtr and
- * advance prevPtr if the segment has left gravity.
+ * This segment refuses to die. Move it to prevPtr and advance
+ * prevPtr if the segment has left gravity.
*/
if (prevPtr == NULL) {
@@ -1448,8 +1448,8 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
}
/*
- * If the beginning and end of the deletion range are in different
- * lines, join the two lines together and discard the ending line.
+ * If the beginning and end of the deletion range are in different lines,
+ * join the two lines together and discard the ending line.
*/
if (index1Ptr->linePtr != index2Ptr->linePtr) {
@@ -1480,24 +1480,28 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
}
prevLinePtr->nextPtr = index2Ptr->linePtr->nextPtr;
}
- /*
- * Check if we need to adjust any partial clients. In this case
- * if we're deleting the line, we actually move back to the
- * previous line for our (start,end) storage. We do this
- * because we still want the portion of the second line that
- * still exists to be in the start,end range.
+
+ /*
+ * Check if we need to adjust any partial clients. In this case if
+ * we're deleting the line, we actually move back to the previous line
+ * for our (start,end) storage. We do this because we still want the
+ * portion of the second line that still exists to be in the start,end
+ * range.
*/
+
if (treePtr->startEnd != NULL) {
int checkCount = 0;
while (treePtr->startEnd[checkCount] != NULL) {
if (treePtr->startEnd[checkCount] == index2Ptr->linePtr) {
TkText *peer = treePtr->startEndRef[checkCount];
- /*
- * We're deleting a line which is the start
- * or end of a current client. This means
- * we need to adjust that client.
+
+ /*
+ * We're deleting a line which is the start or end of a
+ * current client. This means we need to adjust that
+ * client.
*/
+
treePtr->startEnd[checkCount] = index1Ptr->linePtr;
if (peer->start == index2Ptr->linePtr) {
peer->start = index1Ptr->linePtr;
@@ -1522,17 +1526,18 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
CleanupLine(index1Ptr->linePtr);
/*
- * This line now needs to have its height recalculated. For safety,
- * ensure we don't call this function with the last artificial line
- * of text. I _believe_ that it isn't possible to get this far with
- * the last line, but it is good to be safe.
+ * This line now needs to have its height recalculated. For safety, ensure
+ * we don't call this function with the last artificial line of text. I
+ * _believe_ that it isn't possible to get this far with the last line,
+ * but it is good to be safe.
*/
+
if (TkBTreeNextLine(NULL, index1Ptr->linePtr) != NULL) {
- TkTextInvalidateLineMetrics(treePtr->sharedTextPtr, NULL,
- index1Ptr->linePtr, changeToLineCount,
- TK_TEXT_INVALIDATE_DELETE);
+ TkTextInvalidateLineMetrics(treePtr->sharedTextPtr, NULL,
+ index1Ptr->linePtr, changeToLineCount,
+ TK_TEXT_INVALIDATE_DELETE);
}
-
+
/*
* Lastly, rebalance the first node of the range.
*/
@@ -1551,8 +1556,8 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
* Find a particular line in a B-tree based on its line number.
*
* Results:
- * The return value is a pointer to the line structure for the
- * line whose index is "line", or NULL if no such line exists.
+ * The return value is a pointer to the line structure for the line whose
+ * index is "line", or NULL if no such line exists.
*
* Side effects:
* None.
@@ -1562,10 +1567,9 @@ TkBTreeDeleteChars(tree, index1Ptr, index2Ptr)
TkTextLine *
TkBTreeFindLine(tree, textPtr, line)
- TkTextBTree tree; /* B-tree in which to find line. */
- CONST TkText *textPtr; /* Relative to this client of the
- * B-tree */
- int line; /* Index of desired line. */
+ TkTextBTree tree; /* B-tree in which to find line. */
+ CONST TkText *textPtr; /* Relative to this client of the B-tree */
+ int line; /* Index of desired line. */
{
BTree *treePtr = (BTree *) tree;
register Node *nodePtr;
@@ -1574,17 +1578,18 @@ TkBTreeFindLine(tree, textPtr, line)
if (treePtr == NULL) {
treePtr = (BTree *) textPtr->sharedTextPtr->tree;
}
-
+
nodePtr = treePtr->rootPtr;
if ((line < 0) || (line >= nodePtr->numLines)) {
return NULL;
}
-
- /*
- * Check for the any start/end offset for this text widget
+
+ /*
+ * Check for the any start/end offset for this text widget
*/
+
if (textPtr != NULL) {
- if (textPtr->start != NULL) {
+ if (textPtr->start != NULL) {
line += TkBTreeLinesTo(NULL, textPtr->start);
if (line >= nodePtr->numLines) {
return NULL;
@@ -1596,10 +1601,9 @@ TkBTreeFindLine(tree, textPtr, line)
}
}
}
-
+
/*
- * Work down through levels of the tree until a node is found at
- * level 0.
+ * Work down through levels of the tree until a node is found at level 0.
*/
while (nodePtr->level != 0) {
@@ -1635,15 +1639,14 @@ TkBTreeFindLine(tree, textPtr, line)
* Find a particular line in a B-tree based on its pixel count.
*
* Results:
- * The return value is a pointer to the line structure for the
- * line which contains the pixel "pixels", or NULL if no such
- * line exists. If the first line is of height 20, then pixels
- * 0-19 will return it, and pixels = 20 will return the next
- * line.
- *
- * If pixelOffset is non-NULL, it is set to the amount by which
- * 'pixels' exceeds the first pixel located on the returned
- * line. This should always be non-negative.
+ * The return value is a pointer to the line structure for the line which
+ * contains the pixel "pixels", or NULL if no such line exists. If the
+ * first line is of height 20, then pixels 0-19 will return it, and
+ * pixels = 20 will return the next line.
+ *
+ * If pixelOffset is non-NULL, it is set to the amount by which 'pixels'
+ * exceeds the first pixel located on the returned line. This should
+ * always be non-negative.
*
* Side effects:
* None.
@@ -1653,17 +1656,16 @@ TkBTreeFindLine(tree, textPtr, line)
TkTextLine *
TkBTreeFindPixelLine(tree, textPtr, pixels, pixelOffset)
- TkTextBTree tree; /* B-tree to use. */
- CONST TkText *textPtr; /* Relative to this client of the
- * B-tree */
- int pixels; /* Pixel index of desired line. */
- int *pixelOffset; /* Used to return offset */
+ TkTextBTree tree; /* B-tree to use. */
+ CONST TkText *textPtr; /* Relative to this client of the B-tree */
+ int pixels; /* Pixel index of desired line. */
+ int *pixelOffset; /* Used to return offset */
{
BTree *treePtr = (BTree *) tree;
register Node *nodePtr;
register TkTextLine *linePtr;
int pixelReference = textPtr->pixelReference;
-
+
nodePtr = treePtr->rootPtr;
if ((pixels < 0) || (pixels > nodePtr->numPixels[pixelReference])) {
@@ -1673,10 +1675,9 @@ TkBTreeFindPixelLine(tree, textPtr, pixels, pixelOffset)
if (nodePtr->numPixels[pixelReference] == 0) {
Tcl_Panic("TkBTreeFindPixelLine called with empty window");
}
-
+
/*
- * Work down through levels of the tree until a node is found at
- * level 0.
+ * Work down through levels of the tree until a node is found at level 0.
*/
while (nodePtr->level != 0) {
@@ -1694,7 +1695,7 @@ TkBTreeFindPixelLine(tree, textPtr, pixels, pixelOffset)
* Work through the lines attached to the level-0 node.
*/
- for (linePtr = nodePtr->children.linePtr;
+ for (linePtr = nodePtr->children.linePtr;
linePtr->pixels[2*pixelReference] < pixels;
linePtr = linePtr->nextPtr) {
if (linePtr == NULL) {
@@ -1703,7 +1704,7 @@ TkBTreeFindPixelLine(tree, textPtr, pixels, pixelOffset)
pixels -= linePtr->pixels[2*pixelReference];
}
if (pixelOffset != NULL && linePtr != NULL) {
- *pixelOffset = pixels;
+ *pixelOffset = pixels;
}
return linePtr;
}
@@ -1713,13 +1714,13 @@ TkBTreeFindPixelLine(tree, textPtr, pixels, pixelOffset)
*
* TkBTreeNextLine --
*
- * Given an existing line in a B-tree, this procedure locates the
- * next line in the B-tree. This procedure is used for scanning
- * through the B-tree.
+ * Given an existing line in a B-tree, this function locates the next
+ * line in the B-tree. This function is used for scanning through the
+ * B-tree.
*
* Results:
- * The return value is a pointer to the line that immediately
- * follows linePtr, or NULL if there is no such line.
+ * The return value is a pointer to the line that immediately follows
+ * linePtr, or NULL if there is no such line.
*
* Side effects:
* None.
@@ -1729,10 +1730,9 @@ TkBTreeFindPixelLine(tree, textPtr, pixels, pixelOffset)
TkTextLine *
TkBTreeNextLine(textPtr, linePtr)
- CONST TkText *textPtr; /* Next line in the context of
- * this client */
- register TkTextLine *linePtr; /* Pointer to existing line in
- * B-tree. */
+ CONST TkText *textPtr; /* Next line in the context of this client */
+ register TkTextLine *linePtr;
+ /* Pointer to existing line in B-tree. */
{
register Node *nodePtr;
@@ -1743,11 +1743,11 @@ TkBTreeNextLine(textPtr, linePtr)
return linePtr->nextPtr;
}
}
-
+
/*
* This was the last line associated with the particular parent node.
- * Search up the tree for the next node, then search down from that
- * node to find the first line.
+ * Search up the tree for the next node, then search down from that node
+ * to find the first line.
*/
for (nodePtr = linePtr->parentPtr; ; nodePtr = nodePtr->parentPtr) {
@@ -1770,13 +1770,13 @@ TkBTreeNextLine(textPtr, linePtr)
*
* TkBTreePreviousLine --
*
- * Given an existing line in a B-tree, this procedure locates the
- * previous line in the B-tree. This procedure is used for scanning
- * through the B-tree in the reverse direction.
+ * Given an existing line in a B-tree, this function locates the previous
+ * line in the B-tree. This function is used for scanning through the
+ * B-tree in the reverse direction.
*
* Results:
- * The return value is a pointer to the line that immediately
- * preceeds linePtr, or NULL if there is no such line.
+ * The return value is a pointer to the line that immediately preceeds
+ * linePtr, or NULL if there is no such line.
*
* Side effects:
* None.
@@ -1786,23 +1786,23 @@ TkBTreeNextLine(textPtr, linePtr)
TkTextLine *
TkBTreePreviousLine(textPtr, linePtr)
- TkText *textPtr; /* Relative to this client of the
- * B-tree */
- register TkTextLine *linePtr; /* Pointer to existing line in
- * B-tree. */
+ TkText *textPtr; /* Relative to this client of the B-tree */
+ register TkTextLine *linePtr;
+ /* Pointer to existing line in B-tree. */
{
register Node *nodePtr;
register Node *node2Ptr;
register TkTextLine *prevPtr;
if (textPtr != NULL && textPtr->start == linePtr) {
- return NULL;
+ return NULL;
}
-
+
/*
* Find the line under this node just before the starting line.
*/
- prevPtr = linePtr->parentPtr->children.linePtr; /* First line at leaf */
+
+ prevPtr = linePtr->parentPtr->children.linePtr; /* First line at leaf */
while (prevPtr != linePtr) {
if (prevPtr->nextPtr == linePtr) {
return prevPtr;
@@ -1818,6 +1818,7 @@ TkBTreePreviousLine(textPtr, linePtr)
* Search up the tree for the previous node, then search down from that
* node to find its last line.
*/
+
for (nodePtr = linePtr->parentPtr; ; nodePtr = nodePtr->parentPtr) {
if (nodePtr == (Node *) NULL || nodePtr->parentPtr == (Node *) NULL) {
return (TkTextLine *) NULL;
@@ -1826,7 +1827,7 @@ TkBTreePreviousLine(textPtr, linePtr)
break;
}
}
- for (node2Ptr = nodePtr->parentPtr->children.nodePtr; ;
+ for (node2Ptr = nodePtr->parentPtr->children.nodePtr; ;
node2Ptr = node2Ptr->children.nodePtr) {
while (node2Ptr->nextPtr != nodePtr) {
node2Ptr = node2Ptr->nextPtr;
@@ -1848,13 +1849,13 @@ TkBTreePreviousLine(textPtr, linePtr)
*
* TkBTreePixelsTo --
*
- * Given a pointer to a line in a B-tree, return the numerical
- * pixel index of the top of that line (i.e. the result does
- * not include the height of the given line).
- *
- * Since the last line of text (the artificial one) has zero
- * height by defintion, calling this with the last line will
- * return the total number of pixels in the widget.
+ * Given a pointer to a line in a B-tree, return the numerical pixel
+ * index of the top of that line (i.e. the result does not include the
+ * height of the given line).
+ *
+ * Since the last line of text (the artificial one) has zero height by
+ * defintion, calling this with the last line will return the total
+ * number of pixels in the widget.
*
* Results:
* The result is the index of linePtr within the tree, where 0
@@ -1868,10 +1869,8 @@ TkBTreePreviousLine(textPtr, linePtr)
int
TkBTreePixelsTo(textPtr, linePtr)
- CONST TkText *textPtr; /* Relative to this client of the
- * B-tree */
- TkTextLine *linePtr; /* Pointer to existing line in
- * B-tree. */
+ CONST TkText *textPtr; /* Relative to this client of the B-tree */
+ TkTextLine *linePtr; /* Pointer to existing line in B-tree. */
{
register TkTextLine *linePtr2;
register Node *nodePtr, *parentPtr;
@@ -1879,8 +1878,7 @@ TkBTreePixelsTo(textPtr, linePtr)
int pixelReference = textPtr->pixelReference;
/*
- * First count how many pixels precede this line in its level-0
- * node.
+ * First count how many pixels precede this line in its level-0 node.
*/
nodePtr = linePtr->parentPtr;
@@ -1894,9 +1892,8 @@ TkBTreePixelsTo(textPtr, linePtr)
}
/*
- * Now work up through the levels of the tree one at a time,
- * counting how many pixels are in nodes preceding the current
- * node.
+ * Now work up through the levels of the tree one at a time, counting how
+ * many pixels are in nodes preceding the current node.
*/
for (parentPtr = nodePtr->parentPtr ; parentPtr != NULL;
@@ -1918,8 +1915,8 @@ TkBTreePixelsTo(textPtr, linePtr)
*
* TkBTreeLinesTo --
*
- * Given a pointer to a line in a B-tree, return the numerical
- * index of that line.
+ * Given a pointer to a line in a B-tree, return the numerical index of
+ * that line.
*
* Results:
* The result is the index of linePtr within the tree, where 0
@@ -1933,18 +1930,15 @@ TkBTreePixelsTo(textPtr, linePtr)
int
TkBTreeLinesTo(textPtr, linePtr)
- CONST TkText *textPtr; /* Relative to this client of the
- * B-tree */
- TkTextLine *linePtr; /* Pointer to existing line in
- * B-tree. */
+ CONST TkText *textPtr; /* Relative to this client of the B-tree */
+ TkTextLine *linePtr; /* Pointer to existing line in B-tree. */
{
register TkTextLine *linePtr2;
register Node *nodePtr, *parentPtr, *nodePtr2;
int index;
/*
- * First count how many lines precede this one in its level-0
- * node.
+ * First count how many lines precede this one in its level-0 node.
*/
nodePtr = linePtr->parentPtr;
@@ -1958,9 +1952,8 @@ TkBTreeLinesTo(textPtr, linePtr)
}
/*
- * Now work up through the levels of the tree one at a time,
- * counting how many lines are in nodes preceding the current
- * node.
+ * Now work up through the levels of the tree one at a time, counting how
+ * many lines are in nodes preceding the current node.
*/
for (parentPtr = nodePtr->parentPtr ; parentPtr != NULL;
@@ -1974,7 +1967,7 @@ TkBTreeLinesTo(textPtr, linePtr)
}
}
if (textPtr != NULL && textPtr->start != NULL) {
- index -= TkBTreeLinesTo(NULL, textPtr->start);
+ index -= TkBTreeLinesTo(NULL, textPtr->start);
}
return index;
}
@@ -1984,8 +1977,7 @@ TkBTreeLinesTo(textPtr, linePtr)
*
* TkBTreeLinkSegment --
*
- * This procedure adds a new segment to a B-tree at a given
- * location.
+ * This function adds a new segment to a B-tree at a given location.
*
* Results:
* None.
@@ -2000,11 +1992,10 @@ TkBTreeLinesTo(textPtr, linePtr)
void
TkBTreeLinkSegment(segPtr, indexPtr)
TkTextSegment *segPtr; /* Pointer to new segment to be added to
- * B-tree. Should be completely initialized
- * by caller except for nextPtr field. */
- TkTextIndex *indexPtr; /* Where to add segment: it gets linked
- * in just before the segment indicated
- * here. */
+ * B-tree. Should be completely initialized by
+ * caller except for nextPtr field. */
+ TkTextIndex *indexPtr; /* Where to add segment: it gets linked in
+ * just before the segment indicated here. */
{
register TkTextSegment *prevPtr;
@@ -2027,14 +2018,14 @@ TkBTreeLinkSegment(segPtr, indexPtr)
*
* TkBTreeUnlinkSegment --
*
- * This procedure unlinks a segment from its line in a B-tree.
+ * This function unlinks a segment from its line in a B-tree.
*
* Results:
* None.
*
* Side effects:
- * SegPtr will be unlinked from linePtr. The segment itself
- * isn't modified by this procedure.
+ * SegPtr will be unlinked from linePtr. The segment itself isn't
+ * modified by this function.
*
*----------------------------------------------------------------------
*/
@@ -2042,9 +2033,8 @@ TkBTreeLinkSegment(segPtr, indexPtr)
/* ARGSUSED */
void
TkBTreeUnlinkSegment(segPtr, linePtr)
- TkTextSegment *segPtr; /* Segment to be unlinked. */
- TkTextLine *linePtr; /* Line that currently contains
- * segment. */
+ TkTextSegment *segPtr; /* Segment to be unlinked. */
+ TkTextLine *linePtr; /* Line that currently contains segment. */
{
register TkTextSegment *prevPtr;
@@ -2054,12 +2044,13 @@ TkBTreeUnlinkSegment(segPtr, linePtr)
prevPtr = linePtr->segPtr;
while (prevPtr->nextPtr != segPtr) {
prevPtr = prevPtr->nextPtr;
-
+
if (prevPtr == NULL) {
- /*
- * Two logical lines merged into one display line
- * through eliding of a newline
+ /*
+ * Two logical lines merged into one display line through
+ * eliding of a newline
*/
+
linePtr = TkBTreeNextLine(NULL, linePtr);
prevPtr = linePtr->segPtr;
}
@@ -2074,35 +2065,35 @@ TkBTreeUnlinkSegment(segPtr, linePtr)
*
* TkBTreeTag --
*
- * Turn a given tag on or off for a given range of characters in
- * a B-tree of text.
+ * Turn a given tag on or off for a given range of characters in a B-tree
+ * of text.
*
* Results:
- * 1 if the tags on any characters in the range were changed,
- * and zero otherwise (i.e. if the tag was already absent (add = 0)
- * or present (add = 1) on the index range in question).
+ * 1 if the tags on any characters in the range were changed, and zero
+ * otherwise (i.e. if the tag was already absent (add = 0) or present
+ * (add = 1) on the index range in question).
*
* Side effects:
- * The given tag is added to the given range of characters
- * in the tree or removed from all those characters, depending
- * on the "add" argument. The structure of the btree is modified
- * enough that index1Ptr and index2Ptr are no longer valid after
- * this procedure returns, and the indexes may be modified by
- * this procedure.
+ * The given tag is added to the given range of characters in the tree or
+ * removed from all those characters, depending on the "add" argument.
+ * The structure of the btree is modified enough that index1Ptr and
+ * index2Ptr are no longer valid after this function returns, and the
+ * indexes may be modified by this function.
*
*----------------------------------------------------------------------
*/
int
TkBTreeTag(index1Ptr, index2Ptr, tagPtr, add)
- register TkTextIndex *index1Ptr; /* Indicates first character in
- * range. */
- register TkTextIndex *index2Ptr; /* Indicates character just after the
- * last one in range. */
- TkTextTag *tagPtr; /* Tag to add or remove. */
- int add; /* One means add tag to the given
- * range of characters; zero means
- * remove the tag from the range. */
+ register TkTextIndex *index1Ptr;
+ /* Indicates first character in range. */
+ register TkTextIndex *index2Ptr;
+ /* Indicates character just after the last one
+ * in range. */
+ TkTextTag *tagPtr; /* Tag to add or remove. */
+ int add; /* One means add tag to the given range of
+ * characters; zero means remove the tag from
+ * the range. */
{
TkTextSegment *segPtr, *prevPtr;
TkTextSearch search;
@@ -2110,11 +2101,10 @@ TkBTreeTag(index1Ptr, index2Ptr, tagPtr, add)
int oldState;
int changed;
int anyChanges = 0;
-
+
/*
- * See whether the tag is present at the start of the range. If
- * the state doesn't already match what we want then add a toggle
- * there.
+ * See whether the tag is present at the start of the range. If the state
+ * doesn't already match what we want then add a toggle there.
*/
oldState = TkBTreeCharTagged(index1Ptr, tagPtr);
@@ -2136,9 +2126,9 @@ TkBTreeTag(index1Ptr, index2Ptr, tagPtr, add)
}
/*
- * Scan the range of characters and delete any internal tag
- * transitions. Keep track of what the old state was at the end
- * of the range, and add a toggle there if it's needed.
+ * Scan the range of characters and delete any internal tag transitions.
+ * Keep track of what the old state was at the end of the range, and add a
+ * toggle there if it's needed.
*/
TkBTreeStartSearch(index1Ptr, index2Ptr, tagPtr, &search);
@@ -2167,24 +2157,24 @@ TkBTreeTag(index1Ptr, index2Ptr, tagPtr, add)
ckfree((char *) segPtr);
/*
- * The code below is a bit tricky. After deleting a toggle
- * we eventually have to call CleanupLine, in order to allow
- * character segments to be merged together. To do this, we
- * remember in cleanupLinePtr a line that needs to be
- * cleaned up, but we don't clean it up until we've moved
- * on to a different line. That way the cleanup process
- * won't goof up segPtr.
+ * The code below is a bit tricky. After deleting a toggle we
+ * eventually have to call CleanupLine, in order to allow character
+ * segments to be merged together. To do this, we remember in
+ * cleanupLinePtr a line that needs to be cleaned up, but we don't
+ * clean it up until we've moved on to a different line. That way the
+ * cleanup process won't goof up segPtr.
*/
if (cleanupLinePtr != search.curIndex.linePtr) {
CleanupLine(cleanupLinePtr);
cleanupLinePtr = search.curIndex.linePtr;
}
+
/*
- * Quick hack. ChangeNodeToggleCount may move the tag's root
- * location around and leave the search in the void. This resets
- * the search.
+ * Quick hack. ChangeNodeToggleCount may move the tag's root location
+ * around and leave the search in the void. This resets the search.
*/
+
if (changed) {
TkBTreeStartSearch(index1Ptr, index2Ptr, tagPtr, &search);
}
@@ -2207,12 +2197,12 @@ TkBTreeTag(index1Ptr, index2Ptr, tagPtr, add)
}
/*
- * Cleanup cleanupLinePtr and the last line of the range, if
- * these are different.
+ * Cleanup cleanupLinePtr and the last line of the range, if these are
+ * different.
*/
if (anyChanges) {
- CleanupLine(cleanupLinePtr);
+ CleanupLine(cleanupLinePtr);
if (cleanupLinePtr != index2Ptr->linePtr) {
CleanupLine(index2Ptr->linePtr);
}
@@ -2229,32 +2219,32 @@ TkBTreeTag(index1Ptr, index2Ptr, tagPtr, add)
*
* ChangeNodeToggleCount --
*
- * This procedure increments or decrements the toggle count for
- * a particular tag in a particular node and all its ancestors
- * up to the per-tag root node.
+ * This function increments or decrements the toggle count for a
+ * particular tag in a particular node and all its ancestors up to the
+ * per-tag root node.
*
* Results:
* None.
*
* Side effects:
- * The toggle count for tag is adjusted up or down by "delta" in
- * nodePtr. This routine maintains the tagRootPtr that identifies
- * the root node for the tag, moving it up or down the tree as needed.
+ * The toggle count for tag is adjusted up or down by "delta" in nodePtr.
+ * This routine maintains the tagRootPtr that identifies the root node
+ * for the tag, moving it up or down the tree as needed.
*
*----------------------------------------------------------------------
*/
static void
ChangeNodeToggleCount(nodePtr, tagPtr, delta)
- register Node *nodePtr; /* Node whose toggle count for a tag
- * must be changed. */
- TkTextTag *tagPtr; /* Information about tag. */
- int delta; /* Amount to add to current toggle
- * count for tag (may be negative). */
+ register Node *nodePtr; /* Node whose toggle count for a tag must be
+ * changed. */
+ TkTextTag *tagPtr; /* Information about tag. */
+ int delta; /* Amount to add to current toggle count for
+ * tag (may be negative). */
{
register Summary *summaryPtr, *prevPtr;
register Node *node2Ptr;
- int rootLevel; /* Level of original tag root */
+ int rootLevel; /* Level of original tag root */
tagPtr->toggleCount += delta;
if (tagPtr->tagRootPtr == (Node *) NULL) {
@@ -2263,8 +2253,8 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
}
/*
- * Note the level of the existing root for the tag so we can detect
- * if it needs to be moved because of the toggle count change.
+ * Note the level of the existing root for the tag so we can detect if it
+ * needs to be moved because of the toggle count change.
*/
rootLevel = tagPtr->tagRootPtr->level;
@@ -2277,10 +2267,10 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
for ( ; nodePtr != tagPtr->tagRootPtr; nodePtr = nodePtr->parentPtr) {
/*
- * See if there's already an entry for this tag for this node. If so,
+ * See if there's already an entry for this tag for this node. If so,
* perhaps all we have to do is adjust its count.
*/
-
+
for (prevPtr = NULL, summaryPtr = nodePtr->summaryPtr;
summaryPtr != NULL;
prevPtr = summaryPtr, summaryPtr = summaryPtr->nextPtr) {
@@ -2304,7 +2294,7 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
Tcl_Panic("ChangeNodeToggleCount: bad toggle count (%d) max (%d)",
summaryPtr->toggleCount, tagPtr->toggleCount);
}
-
+
/*
* Zero toggle count; must remove this tag from the list.
*/
@@ -2319,20 +2309,19 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
/*
* This tag isn't currently in the summary information list.
*/
-
+
if (rootLevel == nodePtr->level) {
-
+
/*
* The old tag root is at the same level in the tree as this
- * node, but it isn't at this node. Move the tag root up
- * a level, in the hopes that it will now cover this node
- * as well as the old root (if not, we'll move it up again
- * the next time through the loop). To push it up one level
- * we copy the original toggle count into the summary
- * information at the old root and change the root to its
- * parent node.
+ * node, but it isn't at this node. Move the tag root up a
+ * level, in the hopes that it will now cover this node as
+ * well as the old root (if not, we'll move it up again the
+ * next time through the loop). To push it up one level we
+ * copy the original toggle count into the summary information
+ * at the old root and change the root to its parent node.
*/
-
+
Node *rootNodePtr = tagPtr->tagRootPtr;
summaryPtr = (Summary *) ckalloc(sizeof(Summary));
summaryPtr->tagPtr = tagPtr;
@@ -2352,8 +2341,8 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
}
/*
- * If we've decremented the toggle count, then it may be necessary
- * to push the tag root down one or more levels.
+ * If we've decremented the toggle count, then it may be necessary to push
+ * the tag root down one or more levels.
*/
if (delta >= 0) {
@@ -2366,8 +2355,8 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
nodePtr = tagPtr->tagRootPtr;
while (nodePtr->level > 0) {
/*
- * See if a single child node accounts for all of the tag's
- * toggles. If so, push the root down one level.
+ * See if a single child node accounts for all of the tag's toggles.
+ * If so, push the root down one level.
*/
for (node2Ptr = nodePtr->children.nodePtr;
@@ -2416,10 +2405,10 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
* Find the start of the first range of a tag.
*
* Results:
- * The return value is a pointer to the first tag toggle segment
- * for the tag. This can be either a tagon or tagoff segments because
- * of the way TkBTreeAdd removes a tag.
- * Sets *indexPtr to be the index of the tag toggle.
+ * The return value is a pointer to the first tag toggle segment for the
+ * tag. This can be either a tagon or tagoff segments because of the way
+ * TkBTreeAdd removes a tag. Sets *indexPtr to be the index of the tag
+ * toggle.
*
* Side effects:
* None.
@@ -2429,9 +2418,9 @@ ChangeNodeToggleCount(nodePtr, tagPtr, delta)
static TkTextSegment *
FindTagStart(tree, tagPtr, indexPtr)
- TkTextBTree tree; /* Tree to search within */
- TkTextTag *tagPtr; /* Tag to search for. */
- TkTextIndex *indexPtr; /* Return - index information */
+ TkTextBTree tree; /* Tree to search within */
+ TkTextTag *tagPtr; /* Tag to search for. */
+ TkTextIndex *indexPtr; /* Return - index information */
{
register Node *nodePtr;
register TkTextLine *linePtr;
@@ -2445,8 +2434,8 @@ FindTagStart(tree, tagPtr, indexPtr)
}
/*
- * Search from the root of the subtree that contains the tag down
- * to the level 0 node.
+ * Search from the root of the subtree that contains the tag down to the
+ * level 0 node.
*/
while (nodePtr->level > 0) {
@@ -2459,7 +2448,7 @@ FindTagStart(tree, tagPtr, indexPtr)
}
}
}
- gotNodeWithTag:
+ gotNodeWithTag:
continue;
}
@@ -2475,9 +2464,10 @@ FindTagStart(tree, tagPtr, indexPtr)
|| (segPtr->typePtr == &tkTextToggleOffType))
&& (segPtr->body.toggle.tagPtr == tagPtr)) {
/*
- * It is possible that this is a tagoff tag, but that
- * gets cleaned up later.
+ * It is possible that this is a tagoff tag, but that gets
+ * cleaned up later.
*/
+
indexPtr->tree = tree;
indexPtr->linePtr = linePtr;
indexPtr->byteIndex = offset;
@@ -2496,10 +2486,10 @@ FindTagStart(tree, tagPtr, indexPtr)
* Find the end of the last range of a tag.
*
* Results:
- * The return value is a pointer to the last tag toggle segment
- * for the tag. This can be either a tagon or tagoff segments because
- * of the way TkBTreeAdd removes a tag.
- * Sets *indexPtr to be the index of the tag toggle.
+ * The return value is a pointer to the last tag toggle segment for the
+ * tag. This can be either a tagon or tagoff segments because of the way
+ * TkBTreeAdd removes a tag. Sets *indexPtr to be the index of the tag
+ * toggle.
*
* Side effects:
* None.
@@ -2509,9 +2499,9 @@ FindTagStart(tree, tagPtr, indexPtr)
static TkTextSegment *
FindTagEnd(tree, tagPtr, indexPtr)
- TkTextBTree tree; /* Tree to search within */
- TkTextTag *tagPtr; /* Tag to search for. */
- TkTextIndex *indexPtr; /* Return - index information */
+ TkTextBTree tree; /* Tree to search within */
+ TkTextTag *tagPtr; /* Tag to search for. */
+ TkTextIndex *indexPtr; /* Return - index information */
{
register Node *nodePtr, *lastNodePtr;
register TkTextLine *linePtr ,*lastLinePtr;
@@ -2525,8 +2515,8 @@ FindTagEnd(tree, tagPtr, indexPtr)
}
/*
- * Search from the root of the subtree that contains the tag down
- * to the level 0 node.
+ * Search from the root of the subtree that contains the tag down to the
+ * level 0 node.
*/
while (nodePtr->level > 0) {
@@ -2546,13 +2536,14 @@ FindTagEnd(tree, tagPtr, indexPtr)
/*
* Work through the lines attached to the level-0 node.
*/
+
last2SegPtr = NULL;
lastoffset2 = 0;
lastoffset = 0;
for (lastLinePtr = NULL, linePtr = nodePtr->children.linePtr;
linePtr != (TkTextLine *) NULL; linePtr = linePtr->nextPtr) {
for (offset = 0, lastSegPtr = NULL, segPtr = linePtr->segPtr ;
- segPtr != NULL;
+ segPtr != NULL;
offset += segPtr->size, segPtr = segPtr->nextPtr) {
if (((segPtr->typePtr == &tkTextToggleOnType)
|| (segPtr->typePtr == &tkTextToggleOffType))
@@ -2578,19 +2569,19 @@ FindTagEnd(tree, tagPtr, indexPtr)
*
* TkBTreeStartSearch --
*
- * This procedure sets up a search for tag transitions involving
- * a given tag (or all tags) in a given range of the text.
+ * This function sets up a search for tag transitions involving a given
+ * tag (or all tags) in a given range of the text.
*
* Results:
* None.
*
* Side effects:
- * The information at *searchPtr is set up so that subsequent calls
- * to TkBTreeNextTag or TkBTreePrevTag will return information about the
- * locations of tag transitions. Note that TkBTreeNextTag or
- * TkBTreePrevTag must be called to get the first transition.
- * Note: unlike TkBTreeNextTag and TkBTreePrevTag, this routine does not
- * guarantee that searchPtr->curIndex is equal to *index1Ptr. It may be
+ * The information at *searchPtr is set up so that subsequent calls to
+ * TkBTreeNextTag or TkBTreePrevTag will return information about the
+ * locations of tag transitions. Note that TkBTreeNextTag or
+ * TkBTreePrevTag must be called to get the first transition. Note:
+ * unlike TkBTreeNextTag and TkBTreePrevTag, this routine does not
+ * guarantee that searchPtr->curIndex is equal to *index1Ptr. It may be
* greater than that if *index1Ptr is less than the first tag transition.
*
*----------------------------------------------------------------------
@@ -2598,31 +2589,30 @@ FindTagEnd(tree, tagPtr, indexPtr)
void
TkBTreeStartSearch(index1Ptr, index2Ptr, tagPtr, searchPtr)
- TkTextIndex *index1Ptr; /* Search starts here. Tag toggles
- * at this position will not be
- * returned. */
- TkTextIndex *index2Ptr; /* Search stops here. Tag toggles
- * at this position *will* be
- * returned. */
- TkTextTag *tagPtr; /* Tag to search for. NULL means
- * search for any tag. */
- register TkTextSearch *searchPtr; /* Where to store information about
- * search's progress. */
+ TkTextIndex *index1Ptr; /* Search starts here. Tag toggles at this
+ * position will not be returned. */
+ TkTextIndex *index2Ptr; /* Search stops here. Tag toggles at this
+ * position *will* be returned. */
+ TkTextTag *tagPtr; /* Tag to search for. NULL means search for
+ * any tag. */
+ register TkTextSearch *searchPtr;
+ /* Where to store information about search's
+ * progress. */
{
int offset;
TkTextIndex index0; /* First index of the tag */
TkTextSegment *seg0Ptr; /* First segment of the tag */
/*
- * Find the segment that contains the first toggle for the tag. This
- * may become the starting point in the search.
+ * Find the segment that contains the first toggle for the tag. This may
+ * become the starting point in the search.
*/
seg0Ptr = FindTagStart(index1Ptr->tree, tagPtr, &index0);
if (seg0Ptr == (TkTextSegment *) NULL) {
/*
- * Even though there are no toggles, the display code still
- * uses the search curIndex, so initialize that anyway.
+ * Even though there are no toggles, the display code still uses the
+ * search curIndex, so initialize that anyway.
*/
searchPtr->linesLeft = 0;
@@ -2655,14 +2645,15 @@ TkBTreeStartSearch(index1Ptr, index2Ptr, tagPtr, searchPtr)
/*
* Starting and stopping segments are in the same line; mark the
* search as over immediately if the second segment is before the
- * first. A search does not return a toggle at the very start of
- * the range, unless the range is artificially moved up to index0.
+ * first. A search does not return a toggle at the very start of the
+ * range, unless the range is artificially moved up to index0.
*/
- if (((index1Ptr == &index0) &&
+
+ if (((index1Ptr == &index0) &&
(index1Ptr->byteIndex > index2Ptr->byteIndex)) ||
- ((index1Ptr != &index0) &&
+ ((index1Ptr != &index0) &&
(index1Ptr->byteIndex >= index2Ptr->byteIndex))) {
- searchPtr->linesLeft = 0;
+ searchPtr->linesLeft = 0;
}
}
}
@@ -2672,39 +2663,37 @@ TkBTreeStartSearch(index1Ptr, index2Ptr, tagPtr, searchPtr)
*
* TkBTreeStartSearchBack --
*
- * This procedure sets up a search backwards for tag transitions involving
- * a given tag (or all tags) in a given range of the text. In the
- * normal case the first index (*index1Ptr) is beyond the second
- * index (*index2Ptr).
- *
+ * This function sets up a search backwards for tag transitions involving
+ * a given tag (or all tags) in a given range of the text. In the normal
+ * case the first index (*index1Ptr) is beyond the second index
+ * (*index2Ptr).
*
* Results:
* None.
*
* Side effects:
- * The information at *searchPtr is set up so that subsequent calls
- * to TkBTreePrevTag will return information about the
- * locations of tag transitions. Note that TkBTreePrevTag must be called
- * to get the first transition.
- * Note: unlike TkBTreeNextTag and TkBTreePrevTag, this routine does not
- * guarantee that searchPtr->curIndex is equal to *index1Ptr. It may be
- * less than that if *index1Ptr is greater than the last tag transition.
+ * The information at *searchPtr is set up so that subsequent calls to
+ * TkBTreePrevTag will return information about the locations of tag
+ * transitions. Note that TkBTreePrevTag must be called to get the first
+ * transition. Note: unlike TkBTreeNextTag and TkBTreePrevTag, this
+ * routine does not guarantee that searchPtr->curIndex is equal to
+ * *index1Ptr. It may be less than that if *index1Ptr is greater than the
+ * last tag transition.
*
*----------------------------------------------------------------------
*/
void
TkBTreeStartSearchBack(index1Ptr, index2Ptr, tagPtr, searchPtr)
- TkTextIndex *index1Ptr; /* Search starts here. Tag toggles
- * at this position will not be
- * returned. */
- TkTextIndex *index2Ptr; /* Search stops here. Tag toggles
- * at this position *will* be
- * returned. */
- TkTextTag *tagPtr; /* Tag to search for. NULL means
- * search for any tag. */
- register TkTextSearch *searchPtr; /* Where to store information about
- * search's progress. */
+ TkTextIndex *index1Ptr; /* Search starts here. Tag toggles at this
+ * position will not be returned. */
+ TkTextIndex *index2Ptr; /* Search stops here. Tag toggles at this
+ * position *will* be returned. */
+ TkTextTag *tagPtr; /* Tag to search for. NULL means search for
+ * any tag. */
+ register TkTextSearch *searchPtr;
+ /* Where to store information about
+ * search's progress. */
{
int offset;
TkTextIndex index0; /* Last index of the tag */
@@ -2712,15 +2701,15 @@ TkBTreeStartSearchBack(index1Ptr, index2Ptr, tagPtr, searchPtr)
TkTextSegment *seg0Ptr; /* Last segment of the tag */
/*
- * Find the segment that contains the last toggle for the tag. This
- * may become the starting point in the search.
+ * Find the segment that contains the last toggle for the tag. This may
+ * become the starting point in the search.
*/
seg0Ptr = FindTagEnd(index1Ptr->tree, tagPtr, &index0);
if (seg0Ptr == (TkTextSegment *) NULL) {
/*
- * Even though there are no toggles, the display code still
- * uses the search curIndex, so initialize that anyway.
+ * Even though there are no toggles, the display code still uses the
+ * search curIndex, so initialize that anyway.
*/
searchPtr->linesLeft = 0;
@@ -2739,16 +2728,16 @@ TkBTreeStartSearchBack(index1Ptr, index2Ptr, tagPtr, searchPtr)
searchPtr->curIndex = index0;
index1Ptr = &index0;
} else {
- TkTextIndexBackChars(NULL, index1Ptr, 1, &searchPtr->curIndex,
- COUNT_INDICES);
+ TkTextIndexBackChars(NULL, index1Ptr, 1, &searchPtr->curIndex,
+ COUNT_INDICES);
}
searchPtr->segPtr = NULL;
searchPtr->nextPtr = TkTextIndexToSeg(&searchPtr->curIndex, &offset);
searchPtr->curIndex.byteIndex -= offset;
/*
- * Adjust the end of the search so it does find toggles that are right
- * at the second index specified by the user.
+ * Adjust the end of the search so it does find toggles that are right at
+ * the second index specified by the user.
*/
if ((TkBTreeLinesTo(NULL, index2Ptr->linePtr) == 0) &&
@@ -2781,18 +2770,18 @@ TkBTreeStartSearchBack(index1Ptr, index2Ptr, tagPtr, searchPtr)
*
* TkBTreeNextTag --
*
- * Once a tag search has begun, successive calls to this procedure
- * return successive tag toggles. Note: it is NOT SAFE to call this
- * procedure if characters have been inserted into or deleted from
- * the B-tree since the call to TkBTreeStartSearch.
+ * Once a tag search has begun, successive calls to this function return
+ * successive tag toggles. Note: it is NOT SAFE to call this function if
+ * characters have been inserted into or deleted from the B-tree since
+ * the call to TkBTreeStartSearch.
*
* Results:
* The return value is 1 if another toggle was found that met the
- * criteria specified in the call to TkBTreeStartSearch; in this
- * case searchPtr->curIndex gives the toggle's position and
- * searchPtr->curTagPtr points to its segment. 0 is returned if
- * no more matching tag transitions were found; in this case
- * searchPtr->curIndex is the same as searchPtr->stopIndex.
+ * criteria specified in the call to TkBTreeStartSearch; in this case
+ * searchPtr->curIndex gives the toggle's position and
+ * searchPtr->curTagPtr points to its segment. 0 is returned if no more
+ * matching tag transitions were found; in this case searchPtr->curIndex
+ * is the same as searchPtr->stopIndex.
*
* Side effects:
* Information in *searchPtr is modified to update the state of the
@@ -2803,9 +2792,10 @@ TkBTreeStartSearchBack(index1Ptr, index2Ptr, tagPtr, searchPtr)
int
TkBTreeNextTag(searchPtr)
- register TkTextSearch *searchPtr; /* Information about search in
- * progress; must have been set up by
- * call to TkBTreeStartSearch. */
+ register TkTextSearch *searchPtr;
+ /* Information about search in progress; must
+ * have been set up by call to
+ * TkBTreeStartSearch. */
{
register TkTextSegment *segPtr;
register Node *nodePtr;
@@ -2816,9 +2806,9 @@ TkBTreeNextTag(searchPtr)
}
/*
- * The outermost loop iterates over lines that may potentially contain
- * a relevant tag transition, starting from the current segment in
- * the current line.
+ * The outermost loop iterates over lines that may potentially contain a
+ * relevant tag transition, starting from the current segment in the
+ * current line.
*/
segPtr = searchPtr->nextPtr;
@@ -2842,11 +2832,10 @@ TkBTreeNextTag(searchPtr)
}
searchPtr->curIndex.byteIndex += segPtr->size;
}
-
+
/*
* See if there are more lines associated with the current parent
- * node. If so, go back to the top of the loop to search the next
- * one.
+ * node. If so, go back to the top of the loop to search the next one.
*/
nodePtr = searchPtr->curIndex.linePtr->parentPtr;
@@ -2863,14 +2852,14 @@ TkBTreeNextTag(searchPtr)
if (nodePtr == searchPtr->tagPtr->tagRootPtr) {
goto searchOver;
}
-
+
/*
* Search across and up through the B-tree's node hierarchy looking
* for the next node that has a relevant tag transition somewhere in
- * its subtree. Be sure to update linesLeft as we skip over large
+ * its subtree. Be sure to update linesLeft as we skip over large
* chunks of lines.
*/
-
+
while (1) {
while (nodePtr->nextPtr == NULL) {
if (nodePtr->parentPtr == NULL ||
@@ -2889,14 +2878,14 @@ TkBTreeNextTag(searchPtr)
}
searchPtr->linesLeft -= nodePtr->numLines;
}
-
+
/*
* At this point we've found a subtree that has a relevant tag
- * transition. Now search down (and across) through that subtree
- * to find the first level-0 node that has a relevant tag transition.
+ * transition. Now search down (and across) through that subtree to
+ * find the first level-0 node that has a relevant tag transition.
*/
-
- gotNodeWithTag:
+
+ gotNodeWithTag:
while (nodePtr->level > 0) {
for (nodePtr = nodePtr->children.nodePtr; ;
nodePtr = nodePtr->nextPtr) {
@@ -2904,6 +2893,10 @@ TkBTreeNextTag(searchPtr)
summaryPtr = summaryPtr->nextPtr) {
if ((searchPtr->allTags)
|| (summaryPtr->tagPtr == searchPtr->tagPtr)) {
+ /*
+ * Would really like a multi-level continue here...
+ */
+
goto nextChild;
}
}
@@ -2912,13 +2905,13 @@ TkBTreeNextTag(searchPtr)
Tcl_Panic("TkBTreeNextTag found incorrect tag summary info.");
}
}
- nextChild:
+ nextChild:
continue;
}
-
+
/*
* Now we're down to a level-0 node that contains a line that contains
- * a relevant tag transition. Set up line information and go back to
+ * a relevant tag transition. Set up line information and go back to
* the beginning of the loop to search through lines.
*/
@@ -2931,7 +2924,7 @@ TkBTreeNextTag(searchPtr)
continue;
}
- searchOver:
+ searchOver:
searchPtr->linesLeft = 0;
searchPtr->segPtr = NULL;
return 0;
@@ -2942,19 +2935,18 @@ TkBTreeNextTag(searchPtr)
*
* TkBTreePrevTag --
*
- * Once a tag search has begun, successive calls to this procedure
- * return successive tag toggles in the reverse direction.
- * Note: it is NOT SAFE to call this
- * procedure if characters have been inserted into or deleted from
- * the B-tree since the call to TkBTreeStartSearch.
+ * Once a tag search has begun, successive calls to this function return
+ * successive tag toggles in the reverse direction. Note: it is NOT SAFE
+ * to call this function if characters have been inserted into or deleted
+ * from the B-tree since the call to TkBTreeStartSearch.
*
* Results:
* The return value is 1 if another toggle was found that met the
- * criteria specified in the call to TkBTreeStartSearch; in this
- * case searchPtr->curIndex gives the toggle's position and
- * searchPtr->curTagPtr points to its segment. 0 is returned if
- * no more matching tag transitions were found; in this case
- * searchPtr->curIndex is the same as searchPtr->stopIndex.
+ * criteria specified in the call to TkBTreeStartSearch; in this case
+ * searchPtr->curIndex gives the toggle's position and
+ * searchPtr->curTagPtr points to its segment. 0 is returned if no more
+ * matching tag transitions were found; in this case searchPtr->curIndex
+ * is the same as searchPtr->stopIndex.
*
* Side effects:
* Information in *searchPtr is modified to update the state of the
@@ -2965,16 +2957,17 @@ TkBTreeNextTag(searchPtr)
int
TkBTreePrevTag(searchPtr)
- register TkTextSearch *searchPtr; /* Information about search in
- * progress; must have been set up by
- * call to TkBTreeStartSearch. */
+ register TkTextSearch *searchPtr;
+ /* Information about search in progress; must
+ * have been set up by call to
+ * TkBTreeStartSearch. */
{
register TkTextSegment *segPtr, *prevPtr;
register TkTextLine *linePtr, *prevLinePtr;
register Node *nodePtr, *node2Ptr, *prevNodePtr;
register Summary *summaryPtr;
int byteIndex;
- int pastLast; /* Saw last marker during scan */
+ int pastLast; /* Saw last marker during scan */
int linesSkipped;
if (searchPtr->linesLeft <= 0) {
@@ -2982,25 +2975,28 @@ TkBTreePrevTag(searchPtr)
}
/*
- * The outermost loop iterates over lines that may potentially contain
- * a relevant tag transition, starting from the current segment in
- * the current line. "nextPtr" is maintained as the last segment in
- * a line that we can look at.
+ * The outermost loop iterates over lines that may potentially contain a
+ * relevant tag transition, starting from the current segment in the
+ * current line. "nextPtr" is maintained as the last segment in a line
+ * that we can look at.
*/
while (1) {
/*
* Check for the last toggle before the current segment on this line.
*/
+
byteIndex = 0;
if (searchPtr->lastPtr == NULL) {
- /*
+ /*
* Search back to the very beginning, so pastLast is irrelevent.
*/
- pastLast = 1;
+
+ pastLast = 1;
} else {
pastLast = 0;
}
+
for (prevPtr = NULL, segPtr = searchPtr->curIndex.linePtr->segPtr ;
segPtr != NULL && segPtr != searchPtr->nextPtr;
segPtr = segPtr->nextPtr) {
@@ -3012,7 +3008,7 @@ TkBTreePrevTag(searchPtr)
searchPtr->curIndex.byteIndex = byteIndex;
}
if (segPtr == searchPtr->lastPtr) {
- prevPtr = NULL; /* Segments earlier than last don't count */
+ prevPtr = NULL; /* Segments earlier than last don't count */
pastLast = 1;
}
byteIndex += segPtr->size;
@@ -3020,9 +3016,10 @@ TkBTreePrevTag(searchPtr)
if (prevPtr != NULL) {
if (searchPtr->linesLeft == 1 && !pastLast) {
/*
- * We found a segment that is before the stopping index.
- * Note that it is OK if prevPtr == lastPtr.
+ * We found a segment that is before the stopping index. Note
+ * that it is OK if prevPtr == lastPtr.
*/
+
goto searchOver;
}
searchPtr->segPtr = prevPtr;
@@ -3030,7 +3027,7 @@ TkBTreePrevTag(searchPtr)
searchPtr->tagPtr = prevPtr->body.toggle.tagPtr;
return 1;
}
-
+
searchPtr->linesLeft--;
if (searchPtr->linesLeft <= 0) {
goto searchOver;
@@ -3038,7 +3035,7 @@ TkBTreePrevTag(searchPtr)
/*
* See if there are more lines associated with the current parent
- * node. If so, go back to the top of the loop to search the previous
+ * node. If so, go back to the top of the loop to search the previous
* one.
*/
@@ -3056,17 +3053,17 @@ TkBTreePrevTag(searchPtr)
if (nodePtr == searchPtr->tagPtr->tagRootPtr) {
goto searchOver;
}
-
+
/*
* Search across and up through the B-tree's node hierarchy looking
- * for the previous node that has a relevant tag transition somewhere in
- * its subtree. The search and line counting is trickier with/out
- * back pointers. We'll scan all the nodes under a parent up to
- * the current node, searching all of them for tag state. The last
- * one we find, if any, is recorded in prevNodePtr, and any nodes
- * past prevNodePtr that don't have tag state increment linesSkipped.
+ * for the previous node that has a relevant tag transition somewhere
+ * in its subtree. The search and line counting is trickier with/out
+ * back pointers. We'll scan all the nodes under a parent up to the
+ * current node, searching all of them for tag state. The last one we
+ * find, if any, is recorded in prevNodePtr, and any nodes past
+ * prevNodePtr that don't have tag state increment linesSkipped.
*/
-
+
while (1) {
for (prevNodePtr = NULL, linesSkipped = 0,
node2Ptr = nodePtr->parentPtr->children.nodePtr ;
@@ -3082,7 +3079,7 @@ TkBTreePrevTag(searchPtr)
}
linesSkipped += node2Ptr->numLines;
- keepLooking:
+ keepLooking:
continue;
}
if (prevNodePtr != NULL) {
@@ -3096,14 +3093,14 @@ TkBTreePrevTag(searchPtr)
goto searchOver;
}
}
-
+
/*
* At this point we've found a subtree that has a relevant tag
- * transition. Now search down (and across) through that subtree
- * to find the last level-0 node that has a relevant tag transition.
+ * transition. Now search down (and across) through that subtree to
+ * find the last level-0 node that has a relevant tag transition.
*/
-
- gotNodeWithTag:
+
+ gotNodeWithTag:
while (nodePtr->level > 0) {
for (linesSkipped = 0, prevNodePtr = NULL,
nodePtr = nodePtr->children.nodePtr; nodePtr != NULL ;
@@ -3119,7 +3116,7 @@ TkBTreePrevTag(searchPtr)
}
linesSkipped += nodePtr->numLines;
- keepLooking2:
+ keepLooking2:
continue;
}
if (prevNodePtr == NULL) {
@@ -3128,11 +3125,11 @@ TkBTreePrevTag(searchPtr)
searchPtr->linesLeft -= linesSkipped;
nodePtr = prevNodePtr;
}
-
+
/*
* Now we're down to a level-0 node that contains a line that contains
- * a relevant tag transition. Set up line information and go back to
- * the beginning of the loop to search through lines. We start with
+ * a relevant tag transition. Set up line information and go back to
+ * the beginning of the loop to search through lines. We start with
* the last line below the node.
*/
@@ -3149,7 +3146,7 @@ TkBTreePrevTag(searchPtr)
continue;
}
- searchOver:
+ searchOver:
searchPtr->linesLeft = 0;
searchPtr->segPtr = NULL;
return 0;
@@ -3163,8 +3160,8 @@ TkBTreePrevTag(searchPtr)
* Determine whether a particular character has a particular tag.
*
* Results:
- * The return value is 1 if the given tag is in effect at the
- * character given by linePtr and ch, and 0 otherwise.
+ * The return value is 1 if the given tag is in effect at the character
+ * given by linePtr and ch, and 0 otherwise.
*
* Side effects:
* None.
@@ -3174,9 +3171,9 @@ TkBTreePrevTag(searchPtr)
int
TkBTreeCharTagged(indexPtr, tagPtr)
- CONST TkTextIndex *indexPtr; /* Indicates a character position at
- * which to check for a tag. */
- TkTextTag *tagPtr; /* Tag of interest. */
+ CONST TkTextIndex *indexPtr;/* Indicates a character position at which to
+ * check for a tag. */
+ TkTextTag *tagPtr; /* Tag of interest. */
{
register Node *nodePtr;
register TkTextLine *siblingLinePtr;
@@ -3184,10 +3181,10 @@ TkBTreeCharTagged(indexPtr, tagPtr)
TkTextSegment *toggleSegPtr;
int toggles, index;
- /*
- * Check for toggles for the tag in indexPtr's line but before
- * indexPtr. If there is one, its type indicates whether or
- * not the character is tagged.
+ /*
+ * Check for toggles for the tag in indexPtr's line but before indexPtr.
+ * If there is one, its type indicates whether or not the character is
+ * tagged.
*/
toggleSegPtr = NULL;
@@ -3205,9 +3202,8 @@ TkBTreeCharTagged(indexPtr, tagPtr)
}
/*
- * No toggle in this line. Look for toggles for the tag in lines
- * that are predecessors of indexPtr->linePtr but under the same
- * level-0 node.
+ * No toggle in this line. Look for toggles for the tag in lines that are
+ * predecessors of indexPtr->linePtr but under the same level-0 node.
*/
for (siblingLinePtr = indexPtr->linePtr->parentPtr->children.linePtr;
@@ -3227,9 +3223,9 @@ TkBTreeCharTagged(indexPtr, tagPtr)
}
/*
- * No toggle in this node. Scan upwards through the ancestors of
- * this node, counting the number of toggles of the given tag in
- * siblings that precede that node.
+ * No toggle in this node. Scan upwards through the ancestors of this
+ * node, counting the number of toggles of the given tag in siblings that
+ * precede that node.
*/
toggles = 0;
@@ -3238,7 +3234,7 @@ TkBTreeCharTagged(indexPtr, tagPtr)
register Node *siblingPtr;
register Summary *summaryPtr;
- for (siblingPtr = nodePtr->parentPtr->children.nodePtr;
+ for (siblingPtr = nodePtr->parentPtr->children.nodePtr;
siblingPtr != nodePtr; siblingPtr = siblingPtr->nextPtr) {
for (summaryPtr = siblingPtr->summaryPtr; summaryPtr != NULL;
summaryPtr = summaryPtr->nextPtr) {
@@ -3253,8 +3249,8 @@ TkBTreeCharTagged(indexPtr, tagPtr)
}
/*
- * An odd number of toggles means that the tag is present at the
- * given point.
+ * An odd number of toggles means that the tag is present at the given
+ * point.
*/
return toggles & 1;
@@ -3265,17 +3261,17 @@ TkBTreeCharTagged(indexPtr, tagPtr)
*
* TkBTreeGetTags --
*
- * Return information about all of the tags that are associated
- * with a particular character in a B-tree of text.
+ * Return information about all of the tags that are associated with a
+ * particular character in a B-tree of text.
*
* Results:
* The return value is a malloc-ed array containing pointers to
- * information for each of the tags that is associated with
- * the character at the position given by linePtr and ch. The
- * word at *numTagsPtr is filled in with the number of pointers
- * in the array. It is up to the caller to free the array by
- * passing it to free. If there are no tags at the given character
- * then a NULL pointer is returned and *numTagsPtr will be set to 0.
+ * information for each of the tags that is associated with the character
+ * at the position given by linePtr and ch. The word at *numTagsPtr is
+ * filled in with the number of pointers in the array. It is up to the
+ * caller to free the array by passing it to free. If there are no tags
+ * at the given character then a NULL pointer is returned and *numTagsPtr
+ * will be set to 0.
*
* Side effects:
* None.
@@ -3286,11 +3282,11 @@ TkBTreeCharTagged(indexPtr, tagPtr)
/* ARGSUSED */
TkTextTag **
TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
- CONST TkTextIndex *indexPtr;/* Indicates a particular position in
- * the B-tree. */
- CONST TkText *textPtr; /* If non-NULL, then only return tags
- * for this text widget (when there are
- * peer widgets). */
+ CONST TkTextIndex *indexPtr;/* Indicates a particular position in the
+ * B-tree. */
+ CONST TkText *textPtr; /* If non-NULL, then only return tags for this
+ * text widget (when there are peer
+ * widgets). */
int *numTagsPtr; /* Store number of tags found at this
* location. */
{
@@ -3310,8 +3306,7 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
NUM_TAG_INFOS*sizeof(int));
/*
- * Record tag toggles within the line of indexPtr but preceding
- * indexPtr.
+ * Record tag toggles within the line of indexPtr but preceding indexPtr.
*/
linePtr = indexPtr->linePtr;
@@ -3324,12 +3319,13 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
}
index += segPtr->size;
segPtr = segPtr->nextPtr;
-
+
if (segPtr == NULL) {
- /*
- * Two logical lines merged into one display line
- * through eliding of a newline
+ /*
+ * Two logical lines merged into one display line through eliding
+ * of a newline.
*/
+
linePtr = TkBTreeNextLine(NULL, linePtr);
segPtr = linePtr->segPtr;
}
@@ -3353,8 +3349,8 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
}
/*
- * For each node in the ancestry of this line, record tag toggles
- * for all siblings that precede that node.
+ * For each node in the ancestry of this line, record tag toggles for all
+ * siblings that precede that node.
*/
for (nodePtr = indexPtr->linePtr->parentPtr; nodePtr->parentPtr != NULL;
@@ -3362,7 +3358,7 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
register Node *siblingPtr;
register Summary *summaryPtr;
- for (siblingPtr = nodePtr->parentPtr->children.nodePtr;
+ for (siblingPtr = nodePtr->parentPtr->children.nodePtr;
siblingPtr != nodePtr; siblingPtr = siblingPtr->nextPtr) {
for (summaryPtr = siblingPtr->summaryPtr; summaryPtr != NULL;
summaryPtr = summaryPtr->nextPtr) {
@@ -3375,10 +3371,10 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
}
/*
- * Go through the tag information and squash out all of the tags
- * that have even toggle counts (these tags exist before the point
- * of interest, but not at the desired character itself). Also
- * squash out all tags that don't belong to the requested widget.
+ * Go through the tag information and squash out all of the tags that have
+ * even toggle counts (these tags exist before the point of interest, but
+ * not at the desired character itself). Also squash out all tags that
+ * don't belong to the requested widget.
*/
for (src = 0, dst = 0; src < tagInfo.numTags; src++) {
@@ -3406,24 +3402,22 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
*
* Special case to just return information about elided attribute.
* Specialized from TkBTreeGetTags(indexPtr, textPtr, numTagsPtr) and
- * GetStyle(textPtr, indexPtr). Just need to keep track of
- * invisibility settings for each priority, pick highest one active
- * at end.
- *
- * Note that this returns all elide information up to and including
- * the given index (quite obviously). However, this does mean that
- * if indexPtr is a line-start and one then iterates from the beginning
- * of that line forwards, one will actually revisit the segPtrs of
- * size zero (for tag toggling, for example) which have already been
- * seen here.
- *
- * For this reason we fill in the fields 'segPtr' and 'segOffset'
- * of elideInfo, enabling our caller easily to calculate
- * incremental changes from where we left off.
+ * GetStyle(textPtr, indexPtr). Just need to keep track of invisibility
+ * settings for each priority, pick highest one active at end.
+ *
+ * Note that this returns all elide information up to and including the
+ * given index (quite obviously). However, this does mean that if
+ * indexPtr is a line-start and one then iterates from the beginning of
+ * that line forwards, one will actually revisit the segPtrs of size zero
+ * (for tag toggling, for example) which have already been seen here.
+ *
+ * For this reason we fill in the fields 'segPtr' and 'segOffset' of
+ * elideInfo, enabling our caller easily to calculate incremental changes
+ * from where we left off.
*
* Results:
* Returns whether this text should be elided or not.
- *
+ *
* Optionally returns more detailed information in elideInfo.
*
* Side effects:
@@ -3436,11 +3430,11 @@ TkBTreeGetTags(indexPtr, textPtr, numTagsPtr)
int
TkTextIsElided(textPtr, indexPtr, elideInfo)
CONST TkText *textPtr; /* Overall information about text widget. */
- CONST TkTextIndex *indexPtr;/* The character in the text for which
- * display information is wanted. */
- TkTextElideInfo *elideInfo; /* NULL or a pointer to a structure in
- * which indexPtr's elide state will
- * be stored and returned. */
+ CONST TkTextIndex *indexPtr;/* The character in the text for which display
+ * information is wanted. */
+ TkTextElideInfo *elideInfo; /* NULL or a pointer to a structure in which
+ * indexPtr's elide state will be stored and
+ * returned. */
{
register Node *nodePtr;
register TkTextLine *siblingLinePtr;
@@ -3450,33 +3444,35 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
register TkTextElideInfo *infoPtr;
TkTextLine *linePtr;
int elide;
-
+
if (elideInfo == NULL) {
infoPtr = (TkTextElideInfo*)ckalloc((unsigned)sizeof(TkTextElideInfo));
} else {
infoPtr = elideInfo;
}
-
+
infoPtr->elide = 0; /* if nobody says otherwise, it's visible */
infoPtr->tagCnts = infoPtr->deftagCnts;
infoPtr->tagPtrs = infoPtr->deftagPtrs;
infoPtr->numTags = textPtr->sharedTextPtr->numTags;
- /* Almost always avoid malloc, so stay out of system calls */
+ /*
+ * Almost always avoid malloc, so stay out of system calls.
+ */
+
if (LOTSA_TAGS < infoPtr->numTags) {
- infoPtr->tagCnts = (int *)ckalloc((unsigned)sizeof(int)
- * infoPtr->numTags);
- infoPtr->tagPtrs = (TkTextTag **)ckalloc((unsigned)sizeof(TkTextTag*)
- * infoPtr->numTags);
+ infoPtr->tagCnts = (int *)
+ ckalloc((unsigned) sizeof(int) * infoPtr->numTags);
+ infoPtr->tagPtrs = (TkTextTag **)
+ ckalloc((unsigned)sizeof(TkTextTag *) * infoPtr->numTags);
}
-
+
for (i=0; i<infoPtr->numTags; i++) {
infoPtr->tagCnts[i] = 0;
}
/*
- * Record tag toggles within the line of indexPtr but preceding
- * indexPtr.
+ * Record tag toggles within the line of indexPtr but preceding indexPtr.
*/
index = 0;
@@ -3491,35 +3487,38 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
infoPtr->tagCnts[tagPtr->priority]++;
}
}
-
+
index += segPtr->size;
segPtr = segPtr->nextPtr;
if (segPtr == NULL) {
- /*
- * Two logical lines merged into one display line
- * through eliding of a newline
+ /*
+ * Two logical lines merged into one display line through eliding
+ * of a newline.
*/
+
linePtr = TkBTreeNextLine(NULL, linePtr);
segPtr = linePtr->segPtr;
}
}
- /*
- * Store the first segPtr we haven't examined completely
- * so that our caller knows where to start.
+
+ /*
+ * Store the first segPtr we haven't examined completely so that our
+ * caller knows where to start.
*/
+
infoPtr->segPtr = segPtr;
infoPtr->segOffset = index;
-
+
/*
* Record toggles for tags in lines that are predecessors of
* indexPtr->linePtr but under the same level-0 node.
*/
for (siblingLinePtr = indexPtr->linePtr->parentPtr->children.linePtr;
- siblingLinePtr != indexPtr->linePtr;
- siblingLinePtr = siblingLinePtr->nextPtr) {
+ siblingLinePtr != indexPtr->linePtr;
+ siblingLinePtr = siblingLinePtr->nextPtr) {
for (segPtr = siblingLinePtr->segPtr; segPtr != NULL;
- segPtr = segPtr->nextPtr) {
+ segPtr = segPtr->nextPtr) {
if ((segPtr->typePtr == &tkTextToggleOnType)
|| (segPtr->typePtr == &tkTextToggleOffType)) {
tagPtr = segPtr->body.toggle.tagPtr;
@@ -3532,24 +3531,25 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
}
/*
- * For each node in the ancestry of this line, record tag toggles
- * for all siblings that precede that node.
+ * For each node in the ancestry of this line, record tag toggles for all
+ * siblings that precede that node.
*/
for (nodePtr = indexPtr->linePtr->parentPtr; nodePtr->parentPtr != NULL;
- nodePtr = nodePtr->parentPtr) {
+ nodePtr = nodePtr->parentPtr) {
register Node *siblingPtr;
register Summary *summaryPtr;
- for (siblingPtr = nodePtr->parentPtr->children.nodePtr;
- siblingPtr != nodePtr; siblingPtr = siblingPtr->nextPtr) {
+ for (siblingPtr = nodePtr->parentPtr->children.nodePtr;
+ siblingPtr != nodePtr; siblingPtr = siblingPtr->nextPtr) {
for (summaryPtr = siblingPtr->summaryPtr; summaryPtr != NULL;
- summaryPtr = summaryPtr->nextPtr) {
+ summaryPtr = summaryPtr->nextPtr) {
if (summaryPtr->toggleCount & 1) {
tagPtr = summaryPtr->tagPtr;
if (tagPtr->elideString != NULL) {
infoPtr->tagPtrs[tagPtr->priority] = tagPtr;
- infoPtr->tagCnts[tagPtr->priority] += summaryPtr->toggleCount;
+ infoPtr->tagCnts[tagPtr->priority] +=
+ summaryPtr->toggleCount;
}
}
}
@@ -3557,21 +3557,28 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
}
/*
- * Now traverse from highest priority to lowest,
- * take elided value from first odd count (= on)
+ * Now traverse from highest priority to lowest, take elided value from
+ * first odd count (= on)
*/
infoPtr->elidePriority = -1;
for (i = infoPtr->numTags-1; i >=0; i--) {
if (infoPtr->tagCnts[i] & 1) {
- /* Who would make the selection elided? */
+ /*
+ * Who would make the selection elided?
+ */
+
if ((tagPtr == textPtr->selTagPtr)
&& !(textPtr->flags & GOT_FOCUS)
&& (textPtr->inactiveSelBorder == NULL)) {
continue;
}
infoPtr->elide = infoPtr->tagPtrs[i]->elide;
- /* Note: i == infoPtr->tagPtrs[i]->priority */
+
+ /*
+ * Note: i == infoPtr->tagPtrs[i]->priority
+ */
+
infoPtr->elidePriority = i;
break;
}
@@ -3580,11 +3587,11 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
elide = infoPtr->elide;
if (elideInfo == NULL) {
- if (LOTSA_TAGS < infoPtr->numTags) {
+ if (LOTSA_TAGS < infoPtr->numTags) {
ckfree((char *) infoPtr->tagCnts);
ckfree((char *) infoPtr->tagPtrs);
}
-
+
ckfree((char*) infoPtr);
}
@@ -3596,8 +3603,8 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
*
* TkTextFreeElideInfo --
*
- * This is a utility procedure used to free up any memory
- * allocated by the TkTextIsElided function above.
+ * This is a utility function used to free up any memory allocated by the
+ * TkTextIsElided function above.
*
* Results:
* None.
@@ -3611,7 +3618,7 @@ TkTextIsElided(textPtr, indexPtr, elideInfo)
void
TkTextFreeElideInfo(elideInfo)
TkTextElideInfo *elideInfo; /* Free any allocated memory in this
- * structure. */
+ * structure. */
{
if (LOTSA_TAGS < elideInfo->numTags) {
ckfree((char*)elideInfo->tagCnts);
@@ -3624,16 +3631,16 @@ TkTextFreeElideInfo(elideInfo)
*
* IncCount --
*
- * This is a utility procedure used by TkBTreeGetTags. It
- * increments the count for a particular tag, adding a new
- * entry for that tag if there wasn't one previously.
+ * This is a utility function used by TkBTreeGetTags. It increments the
+ * count for a particular tag, adding a new entry for that tag if there
+ * wasn't one previously.
*
* Results:
* None.
*
* Side effects:
- * The information at *tagInfoPtr may be modified, and the arrays
- * may be reallocated to make them larger.
+ * The information at *tagInfoPtr may be modified, and the arrays may be
+ * reallocated to make them larger.
*
*----------------------------------------------------------------------
*/
@@ -3657,9 +3664,8 @@ IncCount(tagPtr, inc, tagInfoPtr)
}
/*
- * There isn't currently an entry for this tag, so we have to
- * make a new one. If the arrays are full, then enlarge the
- * arrays first.
+ * There isn't currently an entry for this tag, so we have to make a new
+ * one. If the arrays are full, then enlarge the arrays first.
*/
if (tagInfoPtr->numTags == tagInfoPtr->arraySize) {
@@ -3668,7 +3674,7 @@ IncCount(tagPtr, inc, tagInfoPtr)
newSize = 2*tagInfoPtr->arraySize;
newTags = (TkTextTag **) ckalloc((unsigned)
- (newSize*sizeof(TkTextTag *)));
+ (newSize * sizeof(TkTextTag *)));
memcpy((VOID *) newTags, (VOID *) tagInfoPtr->tagPtrs,
tagInfoPtr->arraySize * sizeof(TkTextTag *));
ckfree((char *) tagInfoPtr->tagPtrs);
@@ -3691,15 +3697,15 @@ IncCount(tagPtr, inc, tagInfoPtr)
*
* TkBTreeCheck --
*
- * This procedure runs a set of consistency checks over a B-tree
- * and panics if any inconsistencies are found.
+ * This function runs a set of consistency checks over a B-tree and
+ * panics if any inconsistencies are found.
*
* Results:
* None.
*
* Side effects:
- * If a structural defect is found, the procedure panics with an
- * error message.
+ * If a structural defect is found, the function panics with an error
+ * message.
*
*----------------------------------------------------------------------
*/
@@ -3721,14 +3727,15 @@ TkBTreeCheck(tree)
/*
* Make sure that the tag toggle counts and the tag root pointers are OK.
*/
- for (entryPtr = Tcl_FirstHashEntry(&treePtr->sharedTextPtr->tagTable, &search);
+
+ for (entryPtr=Tcl_FirstHashEntry(&treePtr->sharedTextPtr->tagTable,&search);
entryPtr != NULL ; entryPtr = Tcl_NextHashEntry(&search)) {
tagPtr = (TkTextTag *) Tcl_GetHashValue(entryPtr);
nodePtr = tagPtr->tagRootPtr;
if (nodePtr == (Node *) NULL) {
if (tagPtr->toggleCount != 0) {
Tcl_Panic("TkBTreeCheck found \"%s\" with toggles (%d) but no root",
- tagPtr->name, tagPtr->toggleCount);
+ tagPtr->name, tagPtr->toggleCount);
}
continue; /* no ranges for the tag */
} else if (tagPtr->toggleCount == 0) {
@@ -3770,20 +3777,20 @@ TkBTreeCheck(tree)
}
if (count != tagPtr->toggleCount) {
Tcl_Panic("TkBTreeCheck toggleCount (%d) wrong for \"%s\" should be (%d)",
- tagPtr->toggleCount, tagPtr->name, count);
+ tagPtr->toggleCount, tagPtr->name, count);
}
}
/*
- * Call a recursive procedure to do the main body of checks.
+ * Call a recursive function to do the main body of checks.
*/
nodePtr = treePtr->rootPtr;
CheckNodeConsistency(treePtr->rootPtr, treePtr->pixelReferences);
/*
- * Make sure that there are at least two lines in the text and
- * that the last line has no characters except a newline.
+ * Make sure that there are at least two lines in the text and that the
+ * last line has no characters except a newline.
*/
if (nodePtr->numLines < 2) {
@@ -3804,9 +3811,8 @@ TkBTreeCheck(tree)
|| (segPtr->typePtr == &tkTextRightMarkType)
|| (segPtr->typePtr == &tkTextLeftMarkType)) {
/*
- * It's OK to toggle a tag off in the last line, but
- * not to start a new range. It's also OK to have marks
- * in the last line.
+ * It's OK to toggle a tag off in the last line, but not to start a
+ * new range. It's also OK to have marks in the last line.
*/
segPtr = segPtr->nextPtr;
@@ -3832,26 +3838,25 @@ TkBTreeCheck(tree)
*
* CheckNodeConsistency --
*
- * This procedure is called as part of consistency checking for
- * B-trees: it checks several aspects of a node and also runs
- * checks recursively on the node's children.
+ * This function is called as part of consistency checking for B-trees:
+ * it checks several aspects of a node and also runs checks recursively
+ * on the node's children.
*
* Results:
* None.
*
* Side effects:
- * If anything suspicious is found in the tree structure, the
- * procedure panics.
+ * If anything suspicious is found in the tree structure, the function
+ * panics.
*
*----------------------------------------------------------------------
*/
static void
CheckNodeConsistency(nodePtr, references)
- register Node *nodePtr; /* Node whose subtree should be
- * checked. */
- int references; /* Number of referring widgets
- * which have pixel counts. */
+ register Node *nodePtr; /* Node whose subtree should be checked. */
+ int references; /* Number of referring widgets which have
+ * pixel counts. */
{
register Node *childNodePtr;
register Summary *summaryPtr, *summaryPtr2;
@@ -3913,7 +3918,7 @@ CheckNodeConsistency(nodePtr, references)
numChildren++;
numLines++;
for (i = 0; i<references; i++) {
- numPixels[i] += linePtr->pixels[2*i];
+ numPixels[i] += linePtr->pixels[2*i];
}
}
} else {
@@ -3968,7 +3973,7 @@ CheckNodeConsistency(nodePtr, references)
if (references > PIXEL_CLIENTS) {
ckfree((char*)numPixels);
}
-
+
for (summaryPtr = nodePtr->summaryPtr; summaryPtr != NULL;
summaryPtr = summaryPtr->nextPtr) {
if (summaryPtr->tagPtr->toggleCount == summaryPtr->toggleCount) {
@@ -4022,9 +4027,9 @@ CheckNodeConsistency(nodePtr, references)
*
* Rebalance --
*
- * This procedure is called when a node of a B-tree appears to be
- * out of balance (too many children, or too few). It rebalances
- * that node and all of its ancestors in the tree.
+ * This function is called when a node of a B-tree appears to be out of
+ * balance (too many children, or too few). It rebalances that node and
+ * all of its ancestors in the tree.
*
* Results:
* None.
@@ -4037,13 +4042,12 @@ CheckNodeConsistency(nodePtr, references)
static void
Rebalance(treePtr, nodePtr)
- BTree *treePtr; /* Tree that is being rebalanced. */
- register Node *nodePtr; /* Node that may be out of balance. */
+ BTree *treePtr; /* Tree that is being rebalanced. */
+ register Node *nodePtr; /* Node that may be out of balance. */
{
/*
- * Loop over the entire ancestral chain of the node, working up
- * through the tree one node at a time until the root node has
- * been processed.
+ * Loop over the entire ancestral chain of the node, working up through
+ * the tree one node at a time until the root node has been processed.
*/
for ( ; nodePtr != NULL; nodePtr = nodePtr->parentPtr) {
@@ -4052,19 +4056,19 @@ Rebalance(treePtr, nodePtr)
int i;
/*
- * Check to see if the node has too many children. If it does,
- * then split off all but the first MIN_CHILDREN into a separate
- * node following the original one. Then repeat until the
- * node has a decent size.
+ * Check to see if the node has too many children. If it does, then
+ * split off all but the first MIN_CHILDREN into a separate node
+ * following the original one. Then repeat until the node has a decent
+ * size.
*/
if (nodePtr->numChildren > MAX_CHILDREN) {
while (1) {
/*
- * If the node being split is the root node, then make a
- * new root node above it first.
+ * If the node being split is the root node, then make a new
+ * root node above it first.
*/
-
+
if (nodePtr->parentPtr == NULL) {
newPtr = (Node *) ckalloc(sizeof(Node));
newPtr->parentPtr = NULL;
@@ -4074,17 +4078,17 @@ Rebalance(treePtr, nodePtr)
newPtr->children.nodePtr = nodePtr;
newPtr->numChildren = 1;
newPtr->numLines = nodePtr->numLines;
- newPtr->numPixels = (int*) ckalloc(sizeof(int)*
- treePtr->pixelReferences);
+ newPtr->numPixels = (int *)
+ ckalloc(sizeof(int) * treePtr->pixelReferences);
for (i=0; i<treePtr->pixelReferences; i++) {
- newPtr->numPixels[i] = nodePtr->numPixels[i];
+ newPtr->numPixels[i] = nodePtr->numPixels[i];
}
RecomputeNodeCounts(treePtr, newPtr);
treePtr->rootPtr = newPtr;
}
newPtr = (Node *) ckalloc(sizeof(Node));
- newPtr->numPixels = (int*) ckalloc(sizeof(int)*
- treePtr->pixelReferences);
+ newPtr->numPixels = (int *)
+ ckalloc(sizeof(int) * treePtr->pixelReferences);
for (i=0; i<treePtr->pixelReferences; i++) {
newPtr->numPixels[i] = 0;
}
@@ -4123,16 +4127,16 @@ Rebalance(treePtr, nodePtr)
while (nodePtr->numChildren < MIN_CHILDREN) {
register Node *otherPtr;
- Node *halfwayNodePtr = NULL; /* Initialization needed only */
- TkTextLine *halfwayLinePtr = NULL; /* to prevent cc warnings. */
+ Node *halfwayNodePtr = NULL; /* Initialization needed only */
+ TkTextLine *halfwayLinePtr = NULL; /* to prevent cc warnings. */
int totalChildren, firstChildren, i;
/*
- * Too few children for this node. If this is the root then,
- * it's OK for it to have less than MIN_CHILDREN children
- * as long as it's got at least two. If it has only one
- * (and isn't at level 0), then chop the root node out of
- * the tree and use its child as the new root.
+ * Too few children for this node. If this is the root then, it's
+ * OK for it to have less than MIN_CHILDREN children as long as
+ * it's got at least two. If it has only one (and isn't at level
+ * 0), then chop the root node out of the tree and use its child
+ * as the new root.
*/
if (nodePtr->parentPtr == NULL) {
@@ -4146,8 +4150,8 @@ Rebalance(treePtr, nodePtr)
}
/*
- * Not the root. Make sure that there are siblings to
- * balance with.
+ * Not the root. Make sure that there are siblings to balance
+ * with.
*/
if (nodePtr->parentPtr->numChildren < 2) {
@@ -4156,8 +4160,8 @@ Rebalance(treePtr, nodePtr)
}
/*
- * Find a sibling neighbor to borrow from, and arrange for
- * nodePtr to be the earlier of the pair.
+ * Find a sibling neighbor to borrow from, and arrange for nodePtr
+ * to be the earlier of the pair.
*/
if (nodePtr->nextPtr == NULL) {
@@ -4171,11 +4175,10 @@ Rebalance(treePtr, nodePtr)
otherPtr = nodePtr->nextPtr;
/*
- * We're going to either merge the two siblings together
- * into one node or redivide the children among them to
- * balance their loads. As preparation, join their two
- * child lists into a single list and remember the half-way
- * point in the list.
+ * We're going to either merge the two siblings together into one
+ * node or redivide the children among them to balance their
+ * loads. As preparation, join their two child lists into a single
+ * list and remember the half-way point in the list.
*/
totalChildren = nodePtr->numChildren + otherPtr->numChildren;
@@ -4257,28 +4260,27 @@ Rebalance(treePtr, nodePtr)
*
* RecomputeNodeCounts --
*
- * This procedure is called to recompute all the counts in a node
- * (tags, child information, etc.) by scanning the information in
- * its descendants. This procedure is called during rebalancing
- * when a node's child structure has changed.
+ * This function is called to recompute all the counts in a node (tags,
+ * child information, etc.) by scanning the information in its
+ * descendants. This function is called during rebalancing when a node's
+ * child structure has changed.
*
* Results:
* None.
*
* Side effects:
- * The tag counts for nodePtr are modified to reflect its current
- * child structure, as are its numChildren and numLines fields.
- * Also, all of the childrens' parentPtr fields are made to point
- * to nodePtr.
+ * The tag counts for nodePtr are modified to reflect its current child
+ * structure, as are its numChildren and numLines fields. Also, all of
+ * the childrens' parentPtr fields are made to point to nodePtr.
*
*----------------------------------------------------------------------
*/
static void
RecomputeNodeCounts(treePtr, nodePtr)
- register BTree *treePtr; /* The whole B-tree */
- register Node *nodePtr; /* Node whose tag summary information
- * must be recomputed. */
+ register BTree *treePtr; /* The whole B-tree */
+ register Node *nodePtr; /* Node whose tag summary information must be
+ * recomputed. */
{
register Summary *summaryPtr, *summaryPtr2;
register Node *childPtr;
@@ -4286,10 +4288,10 @@ RecomputeNodeCounts(treePtr, nodePtr)
register TkTextSegment *segPtr;
TkTextTag *tagPtr;
int ref;
-
+
/*
- * Zero out all the existing counts for the node, but don't delete
- * the existing Summary records (most of them will probably be reused).
+ * Zero out all the existing counts for the node, but don't delete the
+ * existing Summary records (most of them will probably be reused).
*/
for (summaryPtr = nodePtr->summaryPtr; summaryPtr != NULL;
@@ -4303,9 +4305,8 @@ RecomputeNodeCounts(treePtr, nodePtr)
}
/*
- * Scan through the children, adding the childrens' tag counts into
- * the node's tag counts and adding new Summary structures if
- * necessary.
+ * Scan through the children, adding the childrens' tag counts into the
+ * node's tag counts and adding new Summary structures if necessary.
*/
if (nodePtr->level == 0) {
@@ -4314,7 +4315,7 @@ RecomputeNodeCounts(treePtr, nodePtr)
nodePtr->numChildren++;
nodePtr->numLines++;
for (ref = 0; ref<treePtr->pixelReferences; ref++) {
- nodePtr->numPixels[ref] += linePtr->pixels[2*ref];
+ nodePtr->numPixels[ref] += linePtr->pixels[2*ref];
}
linePtr->parentPtr = nodePtr;
for (segPtr = linePtr->segPtr; segPtr != NULL;
@@ -4375,19 +4376,20 @@ RecomputeNodeCounts(treePtr, nodePtr)
/*
* Scan through the node's tag records again and delete any Summary
* records that still have a zero count, or that have all the toggles.
- * The node with the children that account for all the tags toggles
- * have no summary information, and they become the tagRootPtr for the tag.
+ * The node with the children that account for all the tags toggles have
+ * no summary information, and they become the tagRootPtr for the tag.
*/
summaryPtr2 = NULL;
for (summaryPtr = nodePtr->summaryPtr; summaryPtr != NULL; ) {
- if (summaryPtr->toggleCount > 0 &&
+ if (summaryPtr->toggleCount > 0 &&
summaryPtr->toggleCount < summaryPtr->tagPtr->toggleCount) {
if (nodePtr->level == summaryPtr->tagPtr->tagRootPtr->level) {
/*
- * The tag's root node split and some toggles left.
- * The tag root must move up a level.
+ * The tag's root node split and some toggles left. The tag
+ * root must move up a level.
*/
+
summaryPtr->tagPtr->tagRootPtr = nodePtr->parentPtr;
}
summaryPtr2 = summaryPtr;
@@ -4399,6 +4401,7 @@ RecomputeNodeCounts(treePtr, nodePtr)
* A node merge has collected all the toggles under one node.
* Push the root down to this level.
*/
+
summaryPtr->tagPtr->tagRootPtr = nodePtr;
}
if (summaryPtr2 != NULL) {
@@ -4418,13 +4421,13 @@ RecomputeNodeCounts(treePtr, nodePtr)
*
* TkBTreeNumLines --
*
- * This procedure returns a count of the number of logical lines of
- * text present in a given B-tree.
+ * This function returns a count of the number of logical lines of text
+ * present in a given B-tree.
*
* Results:
- * The return value is a count of the number of usable lines
- * in tree (i.e. it doesn't include the dummy line that is just
- * used to mark the end of the tree).
+ * The return value is a count of the number of usable lines in tree
+ * (i.e. it doesn't include the dummy line that is just used to mark the
+ * end of the tree).
*
* Side effects:
* None.
@@ -4434,13 +4437,12 @@ RecomputeNodeCounts(treePtr, nodePtr)
int
TkBTreeNumLines(tree, textPtr)
- TkTextBTree tree; /* Information about tree. */
- CONST TkText *textPtr; /* Relative to this client of the
- * B-tree */
+ TkTextBTree tree; /* Information about tree. */
+ CONST TkText *textPtr; /* Relative to this client of the B-tree */
{
BTree *treePtr = (BTree *) tree;
int count;
-
+
if (textPtr != NULL && textPtr->end != NULL) {
count = TkBTreeLinesTo(NULL, textPtr->end);
} else {
@@ -4458,15 +4460,15 @@ TkBTreeNumLines(tree, textPtr)
*
* TkBTreeNumPixels --
*
- * This procedure returns a count of the number of pixels of
- * text present in a given widget's B-tree representation.
+ * This function returns a count of the number of pixels of text present
+ * in a given widget's B-tree representation.
*
* Results:
- * The return value is a count of the number of usable pixels in
- * tree (since the dummy line used to mark the end of the B-tree is
- * maintained with zero height, as are any lines that are before or
- * after the '-start -end' range of the text widget in question,
- * the number stored at the root is the number we want).
+ * The return value is a count of the number of usable pixels in tree
+ * (since the dummy line used to mark the end of the B-tree is maintained
+ * with zero height, as are any lines that are before or after the
+ * '-start -end' range of the text widget in question, the number stored
+ * at the root is the number we want).
*
* Side effects:
* None.
@@ -4476,9 +4478,8 @@ TkBTreeNumLines(tree, textPtr)
int
TkBTreeNumPixels(tree, textPtr)
- TkTextBTree tree; /* The B-tree */
- CONST TkText *textPtr; /* Relative to this client of the
- * B-tree */
+ TkTextBTree tree; /* The B-tree */
+ CONST TkText *textPtr; /* Relative to this client of the B-tree */
{
BTree *treePtr = (BTree *) tree;
return treePtr->rootPtr->numPixels[textPtr->pixelReference];
@@ -4489,12 +4490,11 @@ TkBTreeNumPixels(tree, textPtr)
*
* CharSplitProc --
*
- * This procedure implements splitting for character segments.
+ * This function implements splitting for character segments.
*
* Results:
- * The return value is a pointer to a chain of two segments
- * that have the same characters as segPtr except split
- * among the two segments.
+ * The return value is a pointer to a chain of two segments that have the
+ * same characters as segPtr except split among the two segments.
*
* Side effects:
* Storage for segPtr is freed.
@@ -4504,9 +4504,9 @@ TkBTreeNumPixels(tree, textPtr)
static TkTextSegment *
CharSplitProc(segPtr, index)
- TkTextSegment *segPtr; /* Pointer to segment to split. */
- int index; /* Position within segment at which
- * to split. */
+ TkTextSegment *segPtr; /* Pointer to segment to split. */
+ int index; /* Position within segment at which to
+ * split. */
{
TkTextSegment *newPtr1, *newPtr2;
@@ -4531,12 +4531,12 @@ CharSplitProc(segPtr, index)
*
* CharCleanupProc --
*
- * This procedure merges adjacent character segments into
- * a single character segment, if possible.
+ * This function merges adjacent character segments into a single
+ * character segment, if possible.
*
* Results:
- * The return value is a pointer to the first segment in
- * the (new) list of segments that used to start with segPtr.
+ * The return value is a pointer to the first segment in the (new) list
+ * of segments that used to start with segPtr.
*
* Side effects:
* Storage for the segments may be allocated and freed.
@@ -4547,10 +4547,9 @@ CharSplitProc(segPtr, index)
/* ARGSUSED */
static TkTextSegment *
CharCleanupProc(segPtr, linePtr)
- TkTextSegment *segPtr; /* Pointer to first of two adjacent
- * segments to join. */
- TkTextLine *linePtr; /* Line containing segments (not
- * used). */
+ TkTextSegment *segPtr; /* Pointer to first of two adjacent segments
+ * to join. */
+ TkTextLine *linePtr; /* Line containing segments (not used). */
{
TkTextSegment *segPtr2, *newPtr;
@@ -4575,7 +4574,7 @@ CharCleanupProc(segPtr, linePtr)
*
* CharDeleteProc --
*
- * This procedure is invoked to delete a character segment.
+ * This function is invoked to delete a character segment.
*
* Results:
* Always returns 0 to indicate that the segment was deleted.
@@ -4589,11 +4588,11 @@ CharCleanupProc(segPtr, linePtr)
/* ARGSUSED */
static int
CharDeleteProc(segPtr, linePtr, treeGone)
- TkTextSegment *segPtr; /* Segment to delete. */
- TkTextLine *linePtr; /* Line containing segment. */
- int treeGone; /* Non-zero means the entire tree is
- * being deleted, so everything must
- * get cleaned up. */
+ TkTextSegment *segPtr; /* Segment to delete. */
+ TkTextLine *linePtr; /* Line containing segment. */
+ int treeGone; /* Non-zero means the entire tree is being
+ * deleted, so everything must get cleaned
+ * up. */
{
ckfree((char*) segPtr);
return 0;
@@ -4604,15 +4603,14 @@ CharDeleteProc(segPtr, linePtr, treeGone)
*
* CharCheckProc --
*
- * This procedure is invoked to perform consistency checks
- * on character segments.
+ * This function is invoked to perform consistency checks on character
+ * segments.
*
* Results:
* None.
*
* Side effects:
- * If the segment isn't inconsistent then the procedure
- * panics.
+ * If the segment isn't inconsistent then the function panics.
*
*--------------------------------------------------------------
*/
@@ -4624,11 +4622,10 @@ CharCheckProc(segPtr, linePtr)
TkTextLine *linePtr; /* Line containing segment. */
{
/*
- * Make sure that the segment contains the number of
- * characters indicated by its header, and that the last
- * segment in a line ends in a newline. Also make sure
- * that there aren't ever two character segments adjacent
- * to each other: they should be merged together.
+ * Make sure that the segment contains the number of characters indicated
+ * by its header, and that the last segment in a line ends in a newline.
+ * Also make sure that there aren't ever two character segments adjacent
+ * to each other: they should be merged together.
*/
if (segPtr->size <= 0) {
@@ -4641,10 +4638,8 @@ CharCheckProc(segPtr, linePtr)
if (segPtr->body.chars[segPtr->size-1] != '\n') {
Tcl_Panic("CharCheckProc: line doesn't end with newline");
}
- } else {
- if (segPtr->nextPtr->typePtr == &tkTextCharType) {
- Tcl_Panic("CharCheckProc: adjacent character segments weren't merged");
- }
+ } else if (segPtr->nextPtr->typePtr == &tkTextCharType) {
+ Tcl_Panic("CharCheckProc: adjacent character segments weren't merged");
}
}
@@ -4653,27 +4648,26 @@ CharCheckProc(segPtr, linePtr)
*
* ToggleDeleteProc --
*
- * This procedure is invoked to delete toggle segments.
+ * This function is invoked to delete toggle segments.
*
* Results:
- * Returns 1 to indicate that the segment may not be deleted,
- * unless the entire B-tree is going away.
+ * Returns 1 to indicate that the segment may not be deleted, unless the
+ * entire B-tree is going away.
*
* Side effects:
- * If the tree is going away then the toggle's memory is
- * freed; otherwise the toggle counts in nodes above the
- * segment get updated.
+ * If the tree is going away then the toggle's memory is freed; otherwise
+ * the toggle counts in nodes above the segment get updated.
*
*--------------------------------------------------------------
*/
static int
ToggleDeleteProc(segPtr, linePtr, treeGone)
- TkTextSegment *segPtr; /* Segment to check. */
- TkTextLine *linePtr; /* Line containing segment. */
- int treeGone; /* Non-zero means the entire tree is
- * being deleted, so everything must
- * get cleaned up. */
+ TkTextSegment *segPtr; /* Segment to check. */
+ TkTextLine *linePtr; /* Line containing segment. */
+ int treeGone; /* Non-zero means the entire tree is being
+ * deleted, so everything must get cleaned
+ * up. */
{
if (treeGone) {
ckfree((char *) segPtr);
@@ -4681,11 +4675,11 @@ ToggleDeleteProc(segPtr, linePtr, treeGone)
}
/*
- * This toggle is in the middle of a range of characters that's
- * being deleted. Refuse to die. We'll be moved to the end of
- * the deleted range and our cleanup procedure will be called
- * later. Decrement node toggle counts here, and set a flag
- * so we'll re-increment them in the cleanup procedure.
+ * This toggle is in the middle of a range of characters that's being
+ * deleted. Refuse to die. We'll be moved to the end of the deleted range
+ * and our cleanup function will be called later. Decrement node toggle
+ * counts here, and set a flag so we'll re-increment them in the cleanup
+ * function.
*/
if (segPtr->body.toggle.inNodeCounts) {
@@ -4701,20 +4695,19 @@ ToggleDeleteProc(segPtr, linePtr, treeGone)
*
* ToggleCleanupProc --
*
- * This procedure is called when a toggle is part of a line that's
- * been modified in some way. It's invoked after the
- * modifications are complete.
+ * This function is called when a toggle is part of a line that's been
+ * modified in some way. It's invoked after the modifications are
+ * complete.
*
* Results:
- * The return value is the head segment in a new list
- * that is to replace the tail of the line that used to
- * start at segPtr. This allows the procedure to delete
- * or modify segPtr.
+ * The return value is the head segment in a new list that is to replace
+ * the tail of the line that used to start at segPtr. This allows the
+ * function to delete or modify segPtr.
*
* Side effects:
- * Toggle counts in the nodes above the new line will be
- * updated if they're not already. Toggles may be collapsed
- * if there are duplicate toggles at the same position.
+ * Toggle counts in the nodes above the new line will be updated if
+ * they're not already. Toggles may be collapsed if there are duplicate
+ * toggles at the same position.
*
*--------------------------------------------------------------
*/
@@ -4728,10 +4721,10 @@ ToggleCleanupProc(segPtr, linePtr)
int counts;
/*
- * If this is a toggle-off segment, look ahead through the next
- * segments to see if there's a toggle-on segment for the same tag
- * before any segments with non-zero size. If so then the two
- * toggles cancel each other; remove them both.
+ * If this is a toggle-off segment, look ahead through the next segments
+ * to see if there's a toggle-on segment for the same tag before any
+ * segments with non-zero size. If so then the two toggles cancel each
+ * other; remove them both.
*/
if (segPtr->typePtr == &tkTextToggleOffType) {
@@ -4771,8 +4764,8 @@ ToggleCleanupProc(segPtr, linePtr)
*
* ToggleLineChangeProc --
*
- * This procedure is invoked when a toggle segment is about
- * to move from one line to another.
+ * This function is invoked when a toggle segment is about to move from
+ * one line to another.
*
* Results:
* None.
@@ -4800,22 +4793,22 @@ ToggleLineChangeProc(segPtr, linePtr)
*
* ToggleCheckProc --
*
- * This procedure is invoked to perform consistency checks
- * on toggle segments.
+ * This function is invoked to perform consistency checks on toggle
+ * segments.
*
* Results:
* None.
*
* Side effects:
- * If a consistency problem is found the procedure panics.
+ * If a consistency problem is found the function panics.
*
*--------------------------------------------------------------
*/
static void
ToggleCheckProc(segPtr, linePtr)
- TkTextSegment *segPtr; /* Segment to check. */
- TkTextLine *linePtr; /* Line containing segment. */
+ TkTextSegment *segPtr; /* Segment to check. */
+ TkTextLine *linePtr; /* Line containing segment. */
{
register Summary *summaryPtr;
int needSummary;
@@ -4844,3 +4837,11 @@ ToggleCheckProc(segPtr, linePtr)
}
}
}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */