stk/Tk/generic/tkFont.c

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/*
* tkFont.c --
*
* This file maintains a database of fonts for the Tk toolkit.
* It also provides several utility procedures for measuring and
* displaying text.
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCS: @(#) tkFont.c 1.74 97/10/10 14:34:11
*/
#include "tkInt.h"
#include "tkFont.h"
#ifdef BGLK_CODE
# define STk_create_tcl_object SCM_CREATE_TCL_OBJECT
# define STk_convert_Tcl_string2list SCM_tk_string_to_scm_list
# define STk_NewKeywordObj SCM_KEYWORD_OBJ
#endif
/*
* The following structure is used to keep track of all the fonts that
* exist in the current application. It must be stored in the
* TkMainInfo for the application.
*/
typedef struct TkFontInfo {
Tcl_HashTable fontCache; /* Map a string to an existing Tk_Font.
* Keys are CachedFontKey structs, values are
* TkFont structs. */
Tcl_HashTable namedTable; /* Map a name to a set of attributes for a
* font, used when constructing a Tk_Font from
* a named font description. Keys are
* Tk_Uids, values are NamedFont structs. */
TkMainInfo *mainPtr; /* Application that owns this structure. */
int updatePending;
} TkFontInfo;
/*
* The following structure is used as a key in the fontCache.
*/
typedef struct CachedFontKey {
Display *display; /* Display for which font was constructed. */
Tk_Uid string; /* String that describes font. */
} CachedFontKey;
/*
* The following data structure is used to keep track of the font attributes
* for each named font that has been defined. The named font is only deleted
* when the last reference to it goes away.
*/
typedef struct NamedFont {
int refCount; /* Number of users of named font. */
int deletePending; /* Non-zero if font should be deleted when
* last reference goes away. */
TkFontAttributes fa; /* Desired attributes for named font. */
} NamedFont;
/*
* The following two structures are used to keep track of string
* measurement information when using the text layout facilities.
*
* A LayoutChunk represents a contiguous range of text that can be measured
* and displayed by low-level text calls. In general, chunks will be
* delimited by newlines and tabs. Low-level, platform-specific things
* like kerning and non-integer character widths may occur between the
* characters in a single chunk, but not between characters in different
* chunks.
*
* A TextLayout is a collection of LayoutChunks. It can be displayed with
* respect to any origin. It is the implementation of the Tk_TextLayout
* opaque token.
*/
typedef struct LayoutChunk {
CONST char *start; /* Pointer to simple string to be displayed.
* This is a pointer into the TkTextLayout's
* string. */
int numChars; /* The number of characters in this chunk. */
int numDisplayChars; /* The number of characters to display when
* this chunk is displayed. Can be less than
* numChars if extra space characters were
* absorbed by the end of the chunk. This
* will be < 0 if this is a chunk that is
* holding a tab or newline. */
int x, y; /* The origin of the first character in this
* chunk with respect to the upper-left hand
* corner of the TextLayout. */
int totalWidth; /* Width in pixels of this chunk. Used
* when hit testing the invisible spaces at
* the end of a chunk. */
int displayWidth; /* Width in pixels of the displayable
* characters in this chunk. Can be less than
* width if extra space characters were
* absorbed by the end of the chunk. */
} LayoutChunk;
typedef struct TextLayout {
Tk_Font tkfont; /* The font used when laying out the text. */
CONST char *string; /* The string that was layed out. */
int width; /* The maximum width of all lines in the
* text layout. */
int numChunks; /* Number of chunks actually used in
* following array. */
LayoutChunk chunks[1]; /* Array of chunks. The actual size will
* be maxChunks. THIS FIELD MUST BE THE LAST
* IN THE STRUCTURE. */
} TextLayout;
/*
* The following structures are used as two-way maps between the values for
* the fields in the TkFontAttributes structure and the strings used in
* Tcl, when parsing both option-value format and style-list format font
* name strings.
*/
static TkStateMap weightMap[] = {
{TK_FW_NORMAL, "normal"},
{TK_FW_BOLD, "bold"},
{TK_FW_UNKNOWN, NULL}
};
static TkStateMap slantMap[] = {
{TK_FS_ROMAN, "roman"},
{TK_FS_ITALIC, "italic"},
{TK_FS_UNKNOWN, NULL}
};
static TkStateMap underlineMap[] = {
{1, "underline"},
{0, NULL}
};
static TkStateMap overstrikeMap[] = {
{1, "overstrike"},
{0, NULL}
};
/*
* The following structures are used when parsing XLFD's into a set of
* TkFontAttributes.
*/
static TkStateMap xlfdWeightMap[] = {
{TK_FW_NORMAL, "normal"},
{TK_FW_NORMAL, "medium"},
{TK_FW_NORMAL, "book"},
{TK_FW_NORMAL, "light"},
{TK_FW_BOLD, "bold"},
{TK_FW_BOLD, "demi"},
{TK_FW_BOLD, "demibold"},
{TK_FW_NORMAL, NULL} /* Assume anything else is "normal". */
};
static TkStateMap xlfdSlantMap[] = {
{TK_FS_ROMAN, "r"},
{TK_FS_ITALIC, "i"},
{TK_FS_OBLIQUE, "o"},
{TK_FS_ROMAN, NULL} /* Assume anything else is "roman". */
};
static TkStateMap xlfdSetwidthMap[] = {
{TK_SW_NORMAL, "normal"},
{TK_SW_CONDENSE, "narrow"},
{TK_SW_CONDENSE, "semicondensed"},
{TK_SW_CONDENSE, "condensed"},
{TK_SW_UNKNOWN, NULL}
};
static TkStateMap xlfdCharsetMap[] = {
{TK_CS_NORMAL, "iso8859"},
{TK_CS_SYMBOL, "adobe"},
{TK_CS_SYMBOL, "sun"},
{TK_CS_OTHER, NULL}
};
/*
* The following structure and defines specify the valid builtin options
* when configuring a set of font attributes.
*/
static char *fontOpt[] = {
"-family",
"-size",
"-weight",
"-slant",
"-underline",
"-overstrike",
NULL
};
#define FONT_FAMILY 0
#define FONT_SIZE 1
#define FONT_WEIGHT 2
#define FONT_SLANT 3
#define FONT_UNDERLINE 4
#define FONT_OVERSTRIKE 5
#define FONT_NUMFIELDS 6 /* Length of fontOpt array. */
#define GetFontAttributes(tkfont) \
((CONST TkFontAttributes *) &((TkFont *) (tkfont))->fa)
#define GetFontMetrics(tkfont) \
((CONST TkFontMetrics *) &((TkFont *) (tkfont))->fm)
static int ConfigAttributesObj _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Window tkwin, int objc, Tcl_Obj *CONST objv[],
TkFontAttributes *faPtr));
static int FieldSpecified _ANSI_ARGS_((CONST char *field));
static int GetAttributeInfoObj _ANSI_ARGS_((Tcl_Interp *interp,
CONST TkFontAttributes *faPtr, Tcl_Obj *objPtr));
static LayoutChunk * NewChunk _ANSI_ARGS_((TextLayout **layoutPtrPtr,
int *maxPtr, CONST char *start, int numChars,
int curX, int newX, int y));
static int ParseFontNameObj _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Window tkwin, Tcl_Obj *objPtr,
TkFontAttributes *faPtr));
static void RecomputeWidgets _ANSI_ARGS_((TkWindow *winPtr));
static void TheWorldHasChanged _ANSI_ARGS_((
ClientData clientData));
static void UpdateDependantFonts _ANSI_ARGS_((TkFontInfo *fiPtr,
Tk_Window tkwin, Tcl_HashEntry *namedHashPtr));
/*
*---------------------------------------------------------------------------
*
* TkFontPkgInit --
*
* This procedure is called when an application is created. It
* initializes all the structures that are used by the font
* package on a per application basis.
*
* Results:
* Returns a token that must be stored in the TkMainInfo for this
* application.
*
* Side effects:
* Memory allocated.
*
*---------------------------------------------------------------------------
*/
void
TkFontPkgInit(mainPtr)
TkMainInfo *mainPtr; /* The application being created. */
{
TkFontInfo *fiPtr;
fiPtr = (TkFontInfo *) ckalloc(sizeof(TkFontInfo));
Tcl_InitHashTable(&fiPtr->fontCache, sizeof(CachedFontKey) / sizeof(int));
Tcl_InitHashTable(&fiPtr->namedTable, TCL_ONE_WORD_KEYS);
fiPtr->mainPtr = mainPtr;
fiPtr->updatePending = 0;
mainPtr->fontInfoPtr = fiPtr;
}
/*
*---------------------------------------------------------------------------
*
* TkFontPkgFree --
*
* This procedure is called when an application is deleted. It
* deletes all the structures that were used by the font package
* for this application.
*
* Results:
* None.
*
* Side effects:
* Memory freed.
*
*---------------------------------------------------------------------------
*/
void
TkFontPkgFree(mainPtr)
TkMainInfo *mainPtr; /* The application being deleted. */
{
TkFontInfo *fiPtr;
Tcl_HashEntry *hPtr;
Tcl_HashSearch search;
fiPtr = mainPtr->fontInfoPtr;
if (fiPtr->fontCache.numEntries != 0) {
panic("TkFontPkgFree: all fonts should have been freed already");
}
Tcl_DeleteHashTable(&fiPtr->fontCache);
hPtr = Tcl_FirstHashEntry(&fiPtr->namedTable, &search);
while (hPtr != NULL) {
ckfree((char *) Tcl_GetHashValue(hPtr));
hPtr = Tcl_NextHashEntry(&search);
}
Tcl_DeleteHashTable(&fiPtr->namedTable);
if (fiPtr->updatePending != 0) {
Tcl_CancelIdleCall(TheWorldHasChanged, (ClientData) fiPtr);
}
ckfree((char *) fiPtr);
}
/*
*---------------------------------------------------------------------------
*
* Tk_FontObjCmd --
*
* This procedure is implemented to process the "font" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tk_FontObjCmd(clientData, interp, objc, objv)
ClientData clientData; /* Main window associated with interpreter. */
Tcl_Interp *interp; /* Current interpreter. */
int objc; /* Number of arguments. */
Tcl_Obj *CONST objv[]; /* Argument objects. */
{
int index;
Tk_Window tkwin;
TkFontInfo *fiPtr;
static char *optionStrings[] = {
"actual", "configure", "create", "delete",
"families", "measure", "metrics", "names",
NULL
};
enum options {
FONT_ACTUAL, FONT_CONFIGURE, FONT_CREATE, FONT_DELETE,
FONT_FAMILIES, FONT_MEASURE, FONT_METRICS, FONT_NAMES
};
tkwin = (Tk_Window) clientData;
fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg?");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0,
&index) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum options) index) {
case FONT_ACTUAL: {
int skip, result;
Tk_Font tkfont;
Tcl_Obj *objPtr;
CONST TkFontAttributes *faPtr;
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
if (skip < 0) {
return TCL_ERROR;
}
if ((objc < 3) || (objc - skip > 4)) {
Tcl_WrongNumArgs(interp, 2, objv,
#ifdef SCM_CODE
"font ?:displayof window? ?option?");
#else
"font ?-displayof window? ?option?");
#endif
return TCL_ERROR;
}
tkfont = Tk_GetFontFromObj(interp, tkwin, objv[2]);
if (tkfont == NULL) {
return TCL_ERROR;
}
objc -= skip;
objv += skip;
faPtr = GetFontAttributes(tkfont);
objPtr = NULL;
if (objc > 3) {
objPtr = objv[3];
}
result = GetAttributeInfoObj(interp, faPtr, objPtr);
Tk_FreeFont(tkfont);
return result;
}
case FONT_CONFIGURE: {
int result;
char *string;
Tcl_Obj *objPtr;
NamedFont *nfPtr;
Tcl_HashEntry *namedHashPtr;
if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "fontname ?options?");
return TCL_ERROR;
}
string = Tk_GetUid(Tcl_GetStringFromObj(objv[2], NULL));
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable, string);
nfPtr = NULL; /* lint. */
if (namedHashPtr != NULL) {
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
}
if ((namedHashPtr == NULL) || (nfPtr->deletePending != 0)) {
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "named font \"", string,
"\" doesn't exist", NULL);
return TCL_ERROR;
}
if (objc == 3) {
objPtr = NULL;
} else if (objc == 4) {
objPtr = objv[3];
} else {
result = ConfigAttributesObj(interp, tkwin, objc - 3,
objv + 3, &nfPtr->fa);
UpdateDependantFonts(fiPtr, tkwin, namedHashPtr);
return result;
}
return GetAttributeInfoObj(interp, &nfPtr->fa, objPtr);
}
case FONT_CREATE: {
int skip, i;
char *name;
char buf[32];
TkFontAttributes fa;
Tcl_HashEntry *namedHashPtr;
skip = 3;
if (objc < 3) {
name = NULL;
} else {
name = Tcl_GetStringFromObj(objv[2], NULL);
if (name[0] == '-') {
name = NULL;
}
}
if (name == NULL) {
/*
* No font name specified. Generate one of the form "fontX".
*/
for (i = 1; ; i++) {
sprintf(buf, "font%d", i);
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable,
Tk_GetUid(buf));
if (namedHashPtr == NULL) {
break;
}
}
name = buf;
skip = 2;
}
TkInitFontAttributes(&fa);
if (ConfigAttributesObj(interp, tkwin, objc - skip, objv + skip,
&fa) != TCL_OK) {
return TCL_ERROR;
}
if (TkCreateNamedFont(interp, tkwin, name, &fa) != TCL_OK) {
return TCL_ERROR;
}
Tcl_SetStringObj(Tcl_GetObjResult(interp), name, -1);
break;
}
case FONT_DELETE: {
int i;
char *string;
NamedFont *nfPtr;
Tcl_HashEntry *namedHashPtr;
/*
* Delete the named font. If there are still widgets using this
* font, then it isn't deleted right away.
*/
if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "fontname ?fontname ...?");
return TCL_ERROR;
}
for (i = 2; i < objc; i++) {
string = Tk_GetUid(Tcl_GetStringFromObj(objv[i], NULL));
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable, string);
if (namedHashPtr == NULL) {
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "named font \"", string,
"\" doesn't exist", (char *) NULL);
return TCL_ERROR;
}
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
if (nfPtr->refCount != 0) {
nfPtr->deletePending = 1;
} else {
Tcl_DeleteHashEntry(namedHashPtr);
ckfree((char *) nfPtr);
}
}
break;
}
case FONT_FAMILIES: {
int skip;
skip = TkGetDisplayOf(interp, objc - 2, objv + 2, &tkwin);
if (skip < 0) {
return TCL_ERROR;
}
if (objc - skip != 2) {
#ifdef SCM_CODE
Tcl_WrongNumArgs(interp, 2, objv, "?:displayof window?");
#else
Tcl_WrongNumArgs(interp, 2, objv, "?-displayof window?");
#endif
return TCL_ERROR;
}
TkpGetFontFamilies(interp, tkwin);
#ifdef SCM_CODE
Tcl_SetObjResult(interp,
STk_create_tcl_object(
STk_convert_Tcl_string2list(interp->result)));
#endif
break;
}
case FONT_MEASURE: {
char *string;
Tk_Font tkfont;
int length, skip;
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
if (skip < 0) {
return TCL_ERROR;
}
if (objc - skip != 4) {
Tcl_WrongNumArgs(interp, 2, objv,
#ifdef SCM_CODE
"font ?:displayof window? text");
#else
"font ?-displayof window? text");
#endif
return TCL_ERROR;
}
tkfont = Tk_GetFontFromObj(interp, tkwin, objv[2]);
if (tkfont == NULL) {
return TCL_ERROR;
}
string = Tcl_GetStringFromObj(objv[3 + skip], &length);
Tcl_SetIntObj(Tcl_GetObjResult(interp), Tk_TextWidth(tkfont, string, length));
Tk_FreeFont(tkfont);
break;
}
case FONT_METRICS: {
char buf[64];
Tk_Font tkfont;
int skip, index, i;
CONST TkFontMetrics *fmPtr;
static char *switches[] = {
"-ascent", "-descent", "-linespace", "-fixed", NULL
};
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
if (skip < 0) {
return TCL_ERROR;
}
if ((objc < 3) || ((objc - skip) > 4)) {
Tcl_WrongNumArgs(interp, 2, objv,
#ifdef SCM_CODE
"font ?:displayof window? ?option?");
#else
"font ?-displayof window? ?option?");
#endif
return TCL_ERROR;
}
tkfont = Tk_GetFontFromObj(interp, tkwin, objv[2]);
if (tkfont == NULL) {
return TCL_ERROR;
}
objc -= skip;
objv += skip;
fmPtr = GetFontMetrics(tkfont);
if (objc == 3) {
#ifdef SCM_CODE
sprintf(buf, ":ascent %d :descent %d :linespace %d :fixed #%c",
fmPtr->ascent, fmPtr->descent,
fmPtr->ascent + fmPtr->descent,
fmPtr->fixed? 't' : 'f');
Tcl_SetObjResult(interp,
STk_create_tcl_object(
STk_convert_Tcl_string2list(buf)));
#else
sprintf(buf, "-ascent %d -descent %d -linespace %d -fixed %d",
fmPtr->ascent, fmPtr->descent,
fmPtr->ascent + fmPtr->descent,
fmPtr->fixed);
Tcl_SetStringObj(Tcl_GetObjResult(interp), buf, -1);
#endif
} else {
if (Tcl_GetIndexFromObj(interp, objv[3], switches,
"metric", 0, &index) != TCL_OK) {
Tk_FreeFont(tkfont);
return TCL_ERROR;
}
i = 0; /* Needed only to prevent compiler
* warning. */
switch (index) {
case 0: i = fmPtr->ascent; break;
case 1: i = fmPtr->descent; break;
case 2: i = fmPtr->ascent + fmPtr->descent; break;
case 3: i = fmPtr->fixed; break;
}
#ifdef SCM_CODE
if (index == 3)
Tcl_SetBooleanObj(Tcl_GetObjResult(interp), i);
else
#endif
Tcl_SetIntObj(Tcl_GetObjResult(interp), i);
}
Tk_FreeFont(tkfont);
break;
}
case FONT_NAMES: {
char *string;
Tcl_Obj *strPtr;
NamedFont *nfPtr;
Tcl_HashSearch search;
Tcl_HashEntry *namedHashPtr;
if (objc != 2) {
#ifdef SCM_CODE
Tcl_WrongNumArgs(interp, 1, objv, "'names");
#else
Tcl_WrongNumArgs(interp, 1, objv, "names");
#endif
return TCL_ERROR;
}
namedHashPtr = Tcl_FirstHashEntry(&fiPtr->namedTable, &search);
while (namedHashPtr != NULL) {
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
if (nfPtr->deletePending == 0) {
string = Tcl_GetHashKey(&fiPtr->namedTable, namedHashPtr);
strPtr = Tcl_NewStringObj(string, -1);
Tcl_ListObjAppendElement(NULL, Tcl_GetObjResult(interp), strPtr);
}
namedHashPtr = Tcl_NextHashEntry(&search);
}
break;
}
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* UpdateDependantFonts, TheWorldHasChanged, RecomputeWidgets --
*
* Called when the attributes of a named font changes. Updates all
* the instantiated fonts that depend on that named font and then
* uses the brute force approach and prepares every widget to
* recompute its geometry.
*
* Results:
* None.
*
* Side effects:
* Things get queued for redisplay.
*
*---------------------------------------------------------------------------
*/
static void
UpdateDependantFonts(fiPtr, tkwin, namedHashPtr)
TkFontInfo *fiPtr; /* Info about application's fonts. */
Tk_Window tkwin; /* A window in the application. */
Tcl_HashEntry *namedHashPtr;/* The named font that is changing. */
{
Tcl_HashEntry *cacheHashPtr;
Tcl_HashSearch search;
TkFont *fontPtr;
NamedFont *nfPtr;
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
if (nfPtr->refCount == 0) {
/*
* Well nobody's using this named font, so don't have to tell
* any widgets to recompute themselves.
*/
return;
}
cacheHashPtr = Tcl_FirstHashEntry(&fiPtr->fontCache, &search);
while (cacheHashPtr != NULL) {
fontPtr = (TkFont *) Tcl_GetHashValue(cacheHashPtr);
if (fontPtr->namedHashPtr == namedHashPtr) {
TkpGetFontFromAttributes(fontPtr, tkwin, &nfPtr->fa);
if (fiPtr->updatePending == 0) {
fiPtr->updatePending = 1;
Tcl_DoWhenIdle(TheWorldHasChanged, (ClientData) fiPtr);
}
}
cacheHashPtr = Tcl_NextHashEntry(&search);
}
}
static void
TheWorldHasChanged(clientData)
ClientData clientData; /* Info about application's fonts. */
{
TkFontInfo *fiPtr;
fiPtr = (TkFontInfo *) clientData;
fiPtr->updatePending = 0;
RecomputeWidgets(fiPtr->mainPtr->winPtr);
}
static void
RecomputeWidgets(winPtr)
TkWindow *winPtr; /* Window to which command is sent. */
{
if ((winPtr->classProcsPtr != NULL)
&& (winPtr->classProcsPtr->geometryProc != NULL)) {
(*winPtr->classProcsPtr->geometryProc)(winPtr->instanceData);
}
for (winPtr = winPtr->childList; winPtr != NULL; winPtr = winPtr->nextPtr) {
RecomputeWidgets(winPtr);
}
}
/*
*---------------------------------------------------------------------------
*
* TkCreateNamedFont --
*
* Create the specified named font with the given attributes in the
* named font table associated with the interp.
*
* Results:
* Returns TCL_OK if the font was successfully created, or TCL_ERROR
* if the named font already existed. If TCL_ERROR is returned, an
* error message is left in interp->result.
*
* Side effects:
* Assume there used to exist a named font by the specified name, and
* that the named font had been deleted, but there were still some
* widgets using the named font at the time it was deleted. If a
* new named font is created with the same name, all those widgets
* that were using the old named font will be redisplayed using
* the new named font's attributes.
*
*---------------------------------------------------------------------------
*/
int
TkCreateNamedFont(interp, tkwin, name, faPtr)
Tcl_Interp *interp; /* Interp for error return. */
Tk_Window tkwin; /* A window associated with interp. */
CONST char *name; /* Name for the new named font. */
TkFontAttributes *faPtr; /* Attributes for the new named font. */
{
TkFontInfo *fiPtr;
Tcl_HashEntry *namedHashPtr;
int new;
NamedFont *nfPtr;
fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
name = Tk_GetUid(name);
namedHashPtr = Tcl_CreateHashEntry(&fiPtr->namedTable, name, &new);
if (new == 0) {
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
if (nfPtr->deletePending == 0) {
interp->result[0] = '\0';
Tcl_AppendResult(interp, "font \"", name,
"\" already exists", (char *) NULL);
return TCL_ERROR;
}
/*
* Recreating a named font with the same name as a previous
* named font. Some widgets were still using that named
* font, so they need to get redisplayed.
*/
nfPtr->fa = *faPtr;
nfPtr->deletePending = 0;
UpdateDependantFonts(fiPtr, tkwin, namedHashPtr);
return TCL_OK;
}
nfPtr = (NamedFont *) ckalloc(sizeof(NamedFont));
nfPtr->deletePending = 0;
Tcl_SetHashValue(namedHashPtr, nfPtr);
nfPtr->fa = *faPtr;
nfPtr->refCount = 0;
nfPtr->deletePending = 0;
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* Tk_GetFont --
*
* Given a string description of a font, map the description to a
* corresponding Tk_Font that represents the font.
*
* Results:
* The return value is token for the font, or NULL if an error
* prevented the font from being created. If NULL is returned, an
* error message will be left in interp->result.
*
* Side effects:
* Calls Tk_GetFontFromObj(), which modifies interp's result object,
* then copies the string from the result object into interp->result.
* This procedure will go away when Tk_ConfigureWidget() is
* made into an object command.
*
*---------------------------------------------------------------------------
*/
Tk_Font
Tk_GetFont(interp, tkwin, string)
Tcl_Interp *interp; /* Interp for database and error return. */
Tk_Window tkwin; /* For display on which font will be used. */
CONST char *string; /* String describing font, as: named font,
* native format, or parseable string. */
{
Tcl_Obj *strPtr;
Tk_Font tkfont;
strPtr = Tcl_NewStringObj((char *) string, -1);
tkfont = Tk_GetFontFromObj(interp, tkwin, strPtr);
if (tkfont == NULL) {
Tcl_SetResult(interp,
Tcl_GetStringFromObj(Tcl_GetObjResult(interp), NULL),
TCL_VOLATILE);
}
Tcl_DecrRefCount(strPtr); /* done with object */
return tkfont;
}
/*
*---------------------------------------------------------------------------
*
* Tk_GetFontFromObj --
*
* Given a string description of a font, map the description to a
* corresponding Tk_Font that represents the font.
*
* Results:
* The return value is token for the font, or NULL if an error
* prevented the font from being created. If NULL is returned, an
* error message will be left in interp's result object.
*
* Side effects:
* The font is added to an internal database with a reference
* count. For each call to this procedure, there should eventually
* be a call to Tk_FreeFont() so that the database is cleaned up when
* fonts aren't in use anymore.
*
*---------------------------------------------------------------------------
*/
Tk_Font
Tk_GetFontFromObj(interp, tkwin, objPtr)
Tcl_Interp *interp; /* Interp for database and error return. */
Tk_Window tkwin; /* For display on which font will be used. */
Tcl_Obj *objPtr; /* Object describing font, as: named font,
* native format, or parseable string. */
{
TkFontInfo *fiPtr;
CachedFontKey key;
Tcl_HashEntry *cacheHashPtr, *namedHashPtr;
TkFont *fontPtr;
int new, descent;
NamedFont *nfPtr;
char *string;
fiPtr = ((TkWindow *) tkwin)->mainPtr->fontInfoPtr;
string = Tcl_GetStringFromObj(objPtr, NULL);
key.display = Tk_Display(tkwin);
key.string = Tk_GetUid(string);
cacheHashPtr = Tcl_CreateHashEntry(&fiPtr->fontCache, (char *) &key, &new);
if (new == 0) {
/*
* We have already constructed a font with this description for
* this display. Bump the reference count of the cached font.
*/
fontPtr = (TkFont *) Tcl_GetHashValue(cacheHashPtr);
fontPtr->refCount++;
return (Tk_Font) fontPtr;
}
namedHashPtr = Tcl_FindHashEntry(&fiPtr->namedTable, key.string);
if (namedHashPtr != NULL) {
/*
* Construct a font based on a named font.
*/
nfPtr = (NamedFont *) Tcl_GetHashValue(namedHashPtr);
nfPtr->refCount++;
fontPtr = TkpGetFontFromAttributes(NULL, tkwin, &nfPtr->fa);
} else {
/*
* Native font?
*/
fontPtr = TkpGetNativeFont(tkwin, string);
if (fontPtr == NULL) {
TkFontAttributes fa;
TkInitFontAttributes(&fa);
if (ParseFontNameObj(interp, tkwin, objPtr, &fa) != TCL_OK) {
Tcl_DeleteHashEntry(cacheHashPtr);
return NULL;
}
/*
* String contained the attributes inline.
*/
fontPtr = TkpGetFontFromAttributes(NULL, tkwin, &fa);
}
}
Tcl_SetHashValue(cacheHashPtr, fontPtr);
fontPtr->refCount = 1;
fontPtr->cacheHashPtr = cacheHashPtr;
fontPtr->namedHashPtr = namedHashPtr;
Tk_MeasureChars((Tk_Font) fontPtr, "0", 1, 0, 0, &fontPtr->tabWidth);
if (fontPtr->tabWidth == 0) {
fontPtr->tabWidth = fontPtr->fm.maxWidth;
}
fontPtr->tabWidth *= 8;
/*
* Make sure the tab width isn't zero (some fonts may not have enough
* information to set a reasonable tab width).
*/
if (fontPtr->tabWidth == 0) {
fontPtr->tabWidth = 1;
}
/*
* Get information used for drawing underlines in generic code on a
* non-underlined font.
*/
descent = fontPtr->fm.descent;
fontPtr->underlinePos = descent / 2;
fontPtr->underlineHeight = fontPtr->fa.pointsize / 10;
if (fontPtr->underlineHeight == 0) {
fontPtr->underlineHeight = 1;
}
if (fontPtr->underlinePos + fontPtr->underlineHeight > descent) {
/*
* If this set of values would cause the bottom of the underline
* bar to stick below the descent of the font, jack the underline
* up a bit higher.
*/
fontPtr->underlineHeight = descent - fontPtr->underlinePos;
if (fontPtr->underlineHeight == 0) {
fontPtr->underlinePos--;
fontPtr->underlineHeight = 1;
}
}
return (Tk_Font) fontPtr;
}
/*
*---------------------------------------------------------------------------
*
* Tk_NameOfFont --
*
* Given a font, return a textual string identifying it.
*
* Results:
* The return value is the description that was passed to
* Tk_GetFont() to create the font. The storage for the returned
* string is only guaranteed to persist until the font is deleted.
* The caller should not modify this string.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
char *
Tk_NameOfFont(tkfont)
Tk_Font tkfont; /* Font whose name is desired. */
{
TkFont *fontPtr;
Tcl_HashEntry *hPtr;
CachedFontKey *keyPtr;
fontPtr = (TkFont *) tkfont;
hPtr = fontPtr->cacheHashPtr;
keyPtr = (CachedFontKey *) Tcl_GetHashKey(hPtr->tablePtr, hPtr);
return (char *) keyPtr->string;
}
/*
*---------------------------------------------------------------------------
*
* Tk_FreeFont --
*
* Called to release a font allocated by Tk_GetFont().
*
* Results:
* None.
*
* Side effects:
* The reference count associated with font is decremented, and
* only deallocated when no one is using it.
*
*---------------------------------------------------------------------------
*/
void
Tk_FreeFont(tkfont)
Tk_Font tkfont; /* Font to be released. */
{
TkFont *fontPtr;
NamedFont *nfPtr;
if (tkfont == NULL) {
return;
}
fontPtr = (TkFont *) tkfont;
fontPtr->refCount--;
if (fontPtr->refCount == 0) {
if (fontPtr->namedHashPtr != NULL) {
/*
* The font is being deleted. Determine if the associated named
* font definition should and/or can be deleted too.
*/
nfPtr = (NamedFont *) Tcl_GetHashValue(fontPtr->namedHashPtr);
nfPtr->refCount--;
if ((nfPtr->refCount == 0) && (nfPtr->deletePending != 0)) {
Tcl_DeleteHashEntry(fontPtr->namedHashPtr);
ckfree((char *) nfPtr);
}
}
Tcl_DeleteHashEntry(fontPtr->cacheHashPtr);
TkpDeleteFont(fontPtr);
}
}
/*
*---------------------------------------------------------------------------
*
* Tk_FontId --
*
* Given a font, return an opaque handle that should be selected
* into the XGCValues structure in order to get the constructed
* gc to use this font. This procedure would go away if the
* XGCValues structure were replaced with a TkGCValues structure.
*
* Results:
* As above.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
Font
Tk_FontId(tkfont)
Tk_Font tkfont; /* Font that is going to be selected into GC. */
{
TkFont *fontPtr;
fontPtr = (TkFont *) tkfont;
return fontPtr->fid;
}
/*
*---------------------------------------------------------------------------
*
* Tk_GetFontMetrics --
*
* Returns overall ascent and descent metrics for the given font.
* These values can be used to space multiple lines of text and
* to align the baselines of text in different fonts.
*
* Results:
* If *heightPtr is non-NULL, it is filled with the overall height
* of the font, which is the sum of the ascent and descent.
* If *ascentPtr or *descentPtr is non-NULL, they are filled with
* the ascent and/or descent information for the font.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
Tk_GetFontMetrics(tkfont, fmPtr)
Tk_Font tkfont; /* Font in which metrics are calculated. */
Tk_FontMetrics *fmPtr; /* Pointer to structure in which font
* metrics for tkfont will be stored. */
{
TkFont *fontPtr;
fontPtr = (TkFont *) tkfont;
fmPtr->ascent = fontPtr->fm.ascent;
fmPtr->descent = fontPtr->fm.descent;
fmPtr->linespace = fontPtr->fm.ascent + fontPtr->fm.descent;
}
/*
*---------------------------------------------------------------------------
*
* Tk_PostscriptFontName --
*
* Given a Tk_Font, return the name of the corresponding Postscript
* font.
*
* Results:
* The return value is the pointsize of the given Tk_Font.
* The name of the Postscript font is appended to dsPtr.
*
* Side effects:
* If the font does not exist on the printer, the print job will
* fail at print time. Given a "reasonable" Postscript printer,
* the following Tk_Font font families should print correctly:
*
* Avant Garde, Arial, Bookman, Courier, Courier New, Geneva,
* Helvetica, Monaco, New Century Schoolbook, New York,
* Palatino, Symbol, Times, Times New Roman, Zapf Chancery,
* and Zapf Dingbats.
*
* Any other Tk_Font font families may not print correctly
* because the computed Postscript font name may be incorrect.
*
*---------------------------------------------------------------------------
*/
int
Tk_PostscriptFontName(tkfont, dsPtr)
Tk_Font tkfont; /* Font in which text will be printed. */
Tcl_DString *dsPtr; /* Pointer to an initialized Tcl_DString to
* which the name of the Postscript font that
* corresponds to tkfont will be appended. */
{
TkFont *fontPtr;
char *family, *weightString, *slantString;
char *src, *dest;
int upper, len;
len = Tcl_DStringLength(dsPtr);
fontPtr = (TkFont *) tkfont;
/*
* Convert the case-insensitive Tk_Font family name to the
* case-sensitive Postscript family name. Take out any spaces and
* capitalize the first letter of each word.
*/
family = fontPtr->fa.family;
if (strncasecmp(family, "itc ", 4) == 0) {
family = family + 4;
}
if ((strcasecmp(family, "Arial") == 0)
|| (strcasecmp(family, "Geneva") == 0)) {
family = "Helvetica";
} else if ((strcasecmp(family, "Times New Roman") == 0)
|| (strcasecmp(family, "New York") == 0)) {
family = "Times";
} else if ((strcasecmp(family, "Courier New") == 0)
|| (strcasecmp(family, "Monaco") == 0)) {
family = "Courier";
} else if (strcasecmp(family, "AvantGarde") == 0) {
family = "AvantGarde";
} else if (strcasecmp(family, "ZapfChancery") == 0) {
family = "ZapfChancery";
} else if (strcasecmp(family, "ZapfDingbats") == 0) {
family = "ZapfDingbats";
} else {
/*
* Inline, capitalize the first letter of each word, lowercase the
* rest of the letters in each word, and then take out the spaces
* between the words. This may make the DString shorter, which is
* safe to do.
*/
Tcl_DStringAppend(dsPtr, family, -1);
src = dest = Tcl_DStringValue(dsPtr) + len;
upper = 1;
for (; *src != '\0'; src++, dest++) {
while (isspace(UCHAR(*src))) {
src++;
upper = 1;
}
*dest = *src;
if ((upper != 0) && (islower(UCHAR(*src)))) {
*dest = toupper(UCHAR(*src));
}
upper = 0;
}
*dest = '\0';
Tcl_DStringSetLength(dsPtr, dest - Tcl_DStringValue(dsPtr));
family = Tcl_DStringValue(dsPtr) + len;
}
if (family != Tcl_DStringValue(dsPtr) + len) {
Tcl_DStringAppend(dsPtr, family, -1);
family = Tcl_DStringValue(dsPtr) + len;
}
if (strcasecmp(family, "NewCenturySchoolbook") == 0) {
Tcl_DStringSetLength(dsPtr, len);
Tcl_DStringAppend(dsPtr, "NewCenturySchlbk", -1);
family = Tcl_DStringValue(dsPtr) + len;
}
/*
* Get the string to use for the weight.
*/
weightString = NULL;
if (fontPtr->fa.weight == TK_FW_NORMAL) {
if (strcmp(family, "Bookman") == 0) {
weightString = "Light";
} else if (strcmp(family, "AvantGarde") == 0) {
weightString = "Book";
} else if (strcmp(family, "ZapfChancery") == 0) {
weightString = "Medium";
}
} else {
if ((strcmp(family, "Bookman") == 0)
|| (strcmp(family, "AvantGarde") == 0)) {
weightString = "Demi";
} else {
weightString = "Bold";
}
}
/*
* Get the string to use for the slant.
*/
slantString = NULL;
if (fontPtr->fa.slant == TK_FS_ROMAN) {
;
} else {
if ((strcmp(family, "Helvetica") == 0)
|| (strcmp(family, "Courier") == 0)
|| (strcmp(family, "AvantGarde") == 0)) {
slantString = "Oblique";
} else {
slantString = "Italic";
}
}
/*
* The string "Roman" needs to be added to some fonts that are not bold
* and not italic.
*/
if ((slantString == NULL) && (weightString == NULL)) {
if ((strcmp(family, "Times") == 0)
|| (strcmp(family, "NewCenturySchlbk") == 0)
|| (strcmp(family, "Palatino") == 0)) {
Tcl_DStringAppend(dsPtr, "-Roman", -1);
}
} else {
Tcl_DStringAppend(dsPtr, "-", -1);
if (weightString != NULL) {
Tcl_DStringAppend(dsPtr, weightString, -1);
}
if (slantString != NULL) {
Tcl_DStringAppend(dsPtr, slantString, -1);
}
}
return fontPtr->fa.pointsize;
}
/*
*---------------------------------------------------------------------------
*
* Tk_TextWidth --
*
* A wrapper function for the more complicated interface of
* Tk_MeasureChars. Computes how much space the given
* simple string needs.
*
* Results:
* The return value is the width (in pixels) of the given string.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
int
Tk_TextWidth(tkfont, string, numChars)
Tk_Font tkfont; /* Font in which text will be measured. */
CONST char *string; /* String whose width will be computed. */
int numChars; /* Number of characters to consider from
* string, or < 0 for strlen(). */
{
int width;
if (numChars < 0) {
numChars = strlen(string);
}
Tk_MeasureChars(tkfont, string, numChars, 0, 0, &width);
return width;
}
/*
*---------------------------------------------------------------------------
*
* Tk_UnderlineChars --
*
* This procedure draws an underline for a given range of characters
* in a given string. It doesn't draw the characters (which are
* assumed to have been displayed previously); it just draws the
* underline. This procedure would mainly be used to quickly
* underline a few characters without having to construct an
* underlined font. To produce properly underlined text, the
* appropriate underlined font should be constructed and used.
*
* Results:
* None.
*
* Side effects:
* Information gets displayed in "drawable".
*
*----------------------------------------------------------------------
*/
void
Tk_UnderlineChars(display, drawable, gc, tkfont, string, x, y, firstChar,
lastChar)
Display *display; /* Display on which to draw. */
Drawable drawable; /* Window or pixmap in which to draw. */
GC gc; /* Graphics context for actually drawing
* line. */
Tk_Font tkfont; /* Font used in GC; must have been allocated
* by Tk_GetFont(). Used for character
* dimensions, etc. */
CONST char *string; /* String containing characters to be
* underlined or overstruck. */
int x, y; /* Coordinates at which first character of
* string is drawn. */
int firstChar; /* Index of first character. */
int lastChar; /* Index of one after the last character. */
{
TkFont *fontPtr;
int startX, endX;
fontPtr = (TkFont *) tkfont;
Tk_MeasureChars(tkfont, string, firstChar, 0, 0, &startX);
Tk_MeasureChars(tkfont, string, lastChar, 0, 0, &endX);
XFillRectangle(display, drawable, gc, x + startX,
y + fontPtr->underlinePos, (unsigned int) (endX - startX),
(unsigned int) fontPtr->underlineHeight);
}
/*
*---------------------------------------------------------------------------
*
* Tk_ComputeTextLayout --
*
* Computes the amount of screen space needed to display a
* multi-line, justified string of text. Records all the
* measurements that were done to determine to size and
* positioning of the individual lines of text; this information
* can be used by the Tk_DrawTextLayout() procedure to
* display the text quickly (without remeasuring it).
*
* This procedure is useful for simple widgets that want to
* display single-font, multi-line text and want Tk to handle the
* details.
*
* Results:
* The return value is a Tk_TextLayout token that holds the
* measurement information for the given string. The token is
* only valid for the given string. If the string is freed,
* the token is no longer valid and must also be freed. To free
* the token, call Tk_FreeTextLayout().
*
* The dimensions of the screen area needed to display the text
* are stored in *widthPtr and *heightPtr.
*
* Side effects:
* Memory is allocated to hold the measurement information.
*
*---------------------------------------------------------------------------
*/
Tk_TextLayout
Tk_ComputeTextLayout(tkfont, string, numChars, wrapLength, justify, flags,
widthPtr, heightPtr)
Tk_Font tkfont; /* Font that will be used to display text. */
CONST char *string; /* String whose dimensions are to be
* computed. */
int numChars; /* Number of characters to consider from
* string, or < 0 for strlen(). */
int wrapLength; /* Longest permissible line length, in
* pixels. <= 0 means no automatic wrapping:
* just let lines get as long as needed. */
Tk_Justify justify; /* How to justify lines. */
int flags; /* Flag bits OR-ed together.
* TK_IGNORE_TABS means that tab characters
* should not be expanded. TK_IGNORE_NEWLINES
* means that newline characters should not
* cause a line break. */
int *widthPtr; /* Filled with width of string. */
int *heightPtr; /* Filled with height of string. */
{
TkFont *fontPtr;
CONST char *start, *end, *special;
int n, y, charsThisChunk, maxChunks;
int baseline, height, curX, newX, maxWidth;
TextLayout *layoutPtr;
LayoutChunk *chunkPtr;
CONST TkFontMetrics *fmPtr;
#define MAX_LINES 50
int staticLineLengths[MAX_LINES];
int *lineLengths;
int maxLines, curLine, layoutHeight;
lineLengths = staticLineLengths;
maxLines = MAX_LINES;
fontPtr = (TkFont *) tkfont;
fmPtr = &fontPtr->fm;
height = fmPtr->ascent + fmPtr->descent;
if (numChars < 0) {
numChars = strlen(string);
}
maxChunks = 1;
layoutPtr = (TextLayout *) ckalloc(sizeof(TextLayout)
+ (maxChunks - 1) * sizeof(LayoutChunk));
layoutPtr->tkfont = tkfont;
layoutPtr->string = string;
layoutPtr->numChunks = 0;
baseline = fmPtr->ascent;
maxWidth = 0;
/*
* Divide the string up into simple strings and measure each string.
*/
curX = 0;
end = string + numChars;
special = string;
flags &= TK_IGNORE_TABS | TK_IGNORE_NEWLINES;
flags |= TK_WHOLE_WORDS | TK_AT_LEAST_ONE;
curLine = 0;
for (start = string; start < end; ) {
if (start >= special) {
/*
* Find the next special character in the string.
*/
for (special = start; special < end; special++) {
if (!(flags & TK_IGNORE_NEWLINES)) {
if ((*special == '\n') || (*special == '\r')) {
break;
}
}
if (!(flags & TK_IGNORE_TABS)) {
if (*special == '\t') {
break;
}
}
}
}
/*
* Special points at the next special character (or the end of the
* string). Process characters between start and special.
*/
chunkPtr = NULL;
if (start < special) {
charsThisChunk = Tk_MeasureChars(tkfont, start, special - start,
wrapLength - curX, flags, &newX);
newX += curX;
flags &= ~TK_AT_LEAST_ONE;
if (charsThisChunk > 0) {
chunkPtr = NewChunk(&layoutPtr, &maxChunks, start,
charsThisChunk, curX, newX, baseline);
start += charsThisChunk;
curX = newX;
}
}
if ((start == special) && (special < end)) {
/*
* Handle the special character.
*/
chunkPtr = NULL;
if (*special == '\t') {
newX = curX + fontPtr->tabWidth;
newX -= newX % fontPtr->tabWidth;
NewChunk(&layoutPtr, &maxChunks, start, 1, curX, newX,
baseline)->numDisplayChars = -1;
start++;
if ((start < end) &&
((wrapLength <= 0) || (newX <= wrapLength))) {
/*
* More chars can still fit on this line.
*/
curX = newX;
flags &= ~TK_AT_LEAST_ONE;
continue;
}
} else {
NewChunk(&layoutPtr, &maxChunks, start, 1, curX, 1000000000,
baseline)->numDisplayChars = -1;
start++;
goto wrapLine;
}
}
/*
* No more characters are going to go on this line, either because
* no more characters can fit or there are no more characters left.
* Consume all extra spaces at end of line.
*/
while ((start < end) && isspace(UCHAR(*start))) {
if (!(flags & TK_IGNORE_NEWLINES)) {
if ((*start == '\n') || (*start == '\r')) {
break;
}
}
if (!(flags & TK_IGNORE_TABS)) {
if (*start == '\t') {
break;
}
}
start++;
}
if (chunkPtr != NULL) {
/*
* Append all the extra spaces on this line to the end of the
* last text chunk.
*/
charsThisChunk = start - (chunkPtr->start + chunkPtr->numChars);
if (charsThisChunk > 0) {
chunkPtr->numChars += Tk_MeasureChars(tkfont,
chunkPtr->start + chunkPtr->numChars, charsThisChunk,
0, 0, &chunkPtr->totalWidth);
chunkPtr->totalWidth += curX;
}
}
wrapLine:
flags |= TK_AT_LEAST_ONE;
/*
* Save current line length, then move current position to start of
* next line.
*/
if (curX > maxWidth) {
maxWidth = curX;
}
/*
* Remember width of this line, so that all chunks on this line
* can be centered or right justified, if necessary.
*/
if (curLine >= maxLines) {
int *newLengths;
newLengths = (int *) ckalloc(2 * maxLines * sizeof(int));
memcpy((void *) newLengths, lineLengths, maxLines * sizeof(int));
if (lineLengths != staticLineLengths) {
ckfree((char *) lineLengths);
}
lineLengths = newLengths;
maxLines *= 2;
}
lineLengths[curLine] = curX;
curLine++;
curX = 0;
baseline += height;
}
/*
* If last line ends with a newline, then we need to make a 0 width
* chunk on the next line. Otherwise "Hello" and "Hello\n" are the
* same height.
*/
if ((layoutPtr->numChunks > 0) && ((flags & TK_IGNORE_NEWLINES) == 0)) {
if (layoutPtr->chunks[layoutPtr->numChunks - 1].start[0] == '\n') {
chunkPtr = NewChunk(&layoutPtr, &maxChunks, start, 0, curX,
1000000000, baseline);
chunkPtr->numDisplayChars = -1;
baseline += height;
}
}
/*
* Using maximum line length, shift all the chunks so that the lines are
* all justified correctly.
*/
curLine = 0;
chunkPtr = layoutPtr->chunks;
y = chunkPtr->y;
for (n = 0; n < layoutPtr->numChunks; n++) {
int extra;
if (chunkPtr->y != y) {
curLine++;
y = chunkPtr->y;
}
extra = maxWidth - lineLengths[curLine];
if (justify == TK_JUSTIFY_CENTER) {
chunkPtr->x += extra / 2;
} else if (justify == TK_JUSTIFY_RIGHT) {
chunkPtr->x += extra;
}
chunkPtr++;
}
layoutPtr->width = maxWidth;
layoutHeight = baseline - fmPtr->ascent;
if (layoutPtr->numChunks == 0) {
layoutHeight = height;
/*
* This fake chunk is used by the other procedures so that they can
* pretend that there is a chunk with no chars in it, which makes
* the coding simpler.
*/
layoutPtr->numChunks = 1;
layoutPtr->chunks[0].start = string;
layoutPtr->chunks[0].numChars = 0;
layoutPtr->chunks[0].numDisplayChars = -1;
layoutPtr->chunks[0].x = 0;
layoutPtr->chunks[0].y = fmPtr->ascent;
layoutPtr->chunks[0].totalWidth = 0;
layoutPtr->chunks[0].displayWidth = 0;
}
if (widthPtr != NULL) {
*widthPtr = layoutPtr->width;
}
if (heightPtr != NULL) {
*heightPtr = layoutHeight;
}
if (lineLengths != staticLineLengths) {
ckfree((char *) lineLengths);
}
return (Tk_TextLayout) layoutPtr;
}
/*
*---------------------------------------------------------------------------
*
* Tk_FreeTextLayout --
*
* This procedure is called to release the storage associated with
* a Tk_TextLayout when it is no longer needed.
*
* Results:
* None.
*
* Side effects:
* Memory is freed.
*
*---------------------------------------------------------------------------
*/
void
Tk_FreeTextLayout(textLayout)
Tk_TextLayout textLayout; /* The text layout to be released. */
{
TextLayout *layoutPtr;
layoutPtr = (TextLayout *) textLayout;
if (layoutPtr != NULL) {
ckfree((char *) layoutPtr);
}
}
/*
*---------------------------------------------------------------------------
*
* Tk_DrawTextLayout --
*
* Use the information in the Tk_TextLayout token to display a
* multi-line, justified string of text.
*
* This procedure is useful for simple widgets that need to
* display single-font, multi-line text and want Tk to handle
* the details.
*
* Results:
* None.
*
* Side effects:
* Text drawn on the screen.
*
*---------------------------------------------------------------------------
*/
void
Tk_DrawTextLayout(display, drawable, gc, layout, x, y, firstChar, lastChar)
Display *display; /* Display on which to draw. */
Drawable drawable; /* Window or pixmap in which to draw. */
GC gc; /* Graphics context to use for drawing text. */
Tk_TextLayout layout; /* Layout information, from a previous call
* to Tk_ComputeTextLayout(). */
int x, y; /* Upper-left hand corner of rectangle in
* which to draw (pixels). */
int firstChar; /* The index of the first character to draw
* from the given text item. 0 specfies the
* beginning. */
int lastChar; /* The index just after the last character
* to draw from the given text item. A number
* < 0 means to draw all characters. */
{
TextLayout *layoutPtr;
int i, numDisplayChars, drawX;
LayoutChunk *chunkPtr;
layoutPtr = (TextLayout *) layout;
if (layoutPtr == NULL) {
return;
}
if (lastChar < 0) {
lastChar = 100000000;
}
chunkPtr = layoutPtr->chunks;
for (i = 0; i < layoutPtr->numChunks; i++) {
numDisplayChars = chunkPtr->numDisplayChars;
if ((numDisplayChars > 0) && (firstChar < numDisplayChars)) {
if (firstChar <= 0) {
drawX = 0;
firstChar = 0;
} else {
Tk_MeasureChars(layoutPtr->tkfont, chunkPtr->start, firstChar,
0, 0, &drawX);
}
if (lastChar < numDisplayChars) {
numDisplayChars = lastChar;
}
Tk_DrawChars(display, drawable, gc, layoutPtr->tkfont,
chunkPtr->start + firstChar, numDisplayChars - firstChar,
x + chunkPtr->x + drawX, y + chunkPtr->y);
}
firstChar -= chunkPtr->numChars;
lastChar -= chunkPtr->numChars;
if (lastChar <= 0) {
break;
}
chunkPtr++;
}
}
/*
*---------------------------------------------------------------------------
*
* Tk_UnderlineTextLayout --
*
* Use the information in the Tk_TextLayout token to display an
* underline below an individual character. This procedure does
* not draw the text, just the underline.
*
* This procedure is useful for simple widgets that need to
* display single-font, multi-line text with an individual
* character underlined and want Tk to handle the details.
* To display larger amounts of underlined text, construct
* and use an underlined font.
*
* Results:
* None.
*
* Side effects:
* Underline drawn on the screen.
*
*---------------------------------------------------------------------------
*/
void
Tk_UnderlineTextLayout(display, drawable, gc, layout, x, y, underline)
Display *display; /* Display on which to draw. */
Drawable drawable; /* Window or pixmap in which to draw. */
GC gc; /* Graphics context to use for drawing text. */
Tk_TextLayout layout; /* Layout information, from a previous call
* to Tk_ComputeTextLayout(). */
int x, y; /* Upper-left hand corner of rectangle in
* which to draw (pixels). */
int underline; /* Index of the single character to
* underline, or -1 for no underline. */
{
TextLayout *layoutPtr;
TkFont *fontPtr;
int xx, yy, width, height;
if ((Tk_CharBbox(layout, underline, &xx, &yy, &width, &height) != 0)
&& (width != 0)) {
layoutPtr = (TextLayout *) layout;
fontPtr = (TkFont *) layoutPtr->tkfont;
XFillRectangle(display, drawable, gc, x + xx,
y + yy + fontPtr->fm.ascent + fontPtr->underlinePos,
(unsigned int) width, (unsigned int) fontPtr->underlineHeight);
}
}
/*
*---------------------------------------------------------------------------
*
* Tk_PointToChar --
*
* Use the information in the Tk_TextLayout token to determine the
* character closest to the given point. The point must be
* specified with respect to the upper-left hand corner of the
* text layout, which is considered to be located at (0, 0).
*
* Any point whose y-value is less that 0 will be considered closest
* to the first character in the text layout; any point whose y-value
* is greater than the height of the text layout will be considered
* closest to the last character in the text layout.
*
* Any point whose x-value is less than 0 will be considered closest
* to the first character on that line; any point whose x-value is
* greater than the width of the text layout will be considered
* closest to the last character on that line.
*
* Results:
* The return value is the index of the character that was
* closest to the point. Given a text layout with no characters,
* the value 0 will always be returned, referring to a hypothetical
* zero-width placeholder character.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
int
Tk_PointToChar(layout, x, y)
Tk_TextLayout layout; /* Layout information, from a previous call
* to Tk_ComputeTextLayout(). */
int x, y; /* Coordinates of point to check, with
* respect to the upper-left corner of the
* text layout. */
{
TextLayout *layoutPtr;
LayoutChunk *chunkPtr, *lastPtr;
TkFont *fontPtr;
int i, n, dummy, baseline, pos;
if (y < 0) {
/*
* Point lies above any line in this layout. Return the index of
* the first char.
*/
return 0;
}
/*
* Find which line contains the point.
*/
layoutPtr = (TextLayout *) layout;
fontPtr = (TkFont *) layoutPtr->tkfont;
lastPtr = chunkPtr = layoutPtr->chunks;
for (i = 0; i < layoutPtr->numChunks; i++) {
baseline = chunkPtr->y;
if (y < baseline + fontPtr->fm.descent) {
if (x < chunkPtr->x) {
/*
* Point is to the left of all chunks on this line. Return
* the index of the first character on this line.
*/
return chunkPtr->start - layoutPtr->string;
}
if (x >= layoutPtr->width) {
/*
* If point lies off right side of the text layout, return
* the last char in the last chunk on this line. Without
* this, it might return the index of the first char that
* was located outside of the text layout.
*/
x = INT_MAX;
}
/*
* Examine all chunks on this line to see which one contains
* the specified point.
*/
lastPtr = chunkPtr;
while ((i < layoutPtr->numChunks) && (chunkPtr->y == baseline)) {
if (x < chunkPtr->x + chunkPtr->totalWidth) {
/*
* Point falls on one of the characters in this chunk.
*/
if (chunkPtr->numDisplayChars < 0) {
/*
* This is a special chunk that encapsulates a single
* tab or newline char.
*/
return chunkPtr->start - layoutPtr->string;
}
n = Tk_MeasureChars((Tk_Font) fontPtr, chunkPtr->start,
chunkPtr->numChars, x + 1 - chunkPtr->x,
TK_PARTIAL_OK, &dummy);
return (chunkPtr->start + n - 1) - layoutPtr->string;
}
lastPtr = chunkPtr;
chunkPtr++;
i++;
}
/*
* Point is to the right of all chars in all the chunks on this
* line. Return the index just past the last char in the last
* chunk on this line.
*/
pos = (lastPtr->start + lastPtr->numChars) - layoutPtr->string;
if (i < layoutPtr->numChunks) {
pos--;
}
return pos;
}
lastPtr = chunkPtr;
chunkPtr++;
}
/*
* Point lies below any line in this text layout. Return the index
* just past the last char.
*/
return (lastPtr->start + lastPtr->numChars) - layoutPtr->string;
}
/*
*---------------------------------------------------------------------------
*
* Tk_CharBbox --
*
* Use the information in the Tk_TextLayout token to return the
* bounding box for the character specified by index.
*
* The width of the bounding box is the advance width of the
* character, and does not include and left- or right-bearing.
* Any character that extends partially outside of the
* text layout is considered to be truncated at the edge. Any
* character which is located completely outside of the text
* layout is considered to be zero-width and pegged against
* the edge.
*
* The height of the bounding box is the line height for this font,
* extending from the top of the ascent to the bottom of the
* descent. Information about the actual height of the individual
* letter is not available.
*
* A text layout that contains no characters is considered to
* contain a single zero-width placeholder character.
*
* Results:
* The return value is 0 if the index did not specify a character
* in the text layout, or non-zero otherwise. In that case,
* *bbox is filled with the bounding box of the character.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
int
Tk_CharBbox(layout, index, xPtr, yPtr, widthPtr, heightPtr)
Tk_TextLayout layout; /* Layout information, from a previous call to
* Tk_ComputeTextLayout(). */
int index; /* The index of the character whose bbox is
* desired. */
int *xPtr, *yPtr; /* Filled with the upper-left hand corner, in
* pixels, of the bounding box for the character
* specified by index, if non-NULL. */
int *widthPtr, *heightPtr;
/* Filled with the width and height of the
* bounding box for the character specified by
* index, if non-NULL. */
{
TextLayout *layoutPtr;
LayoutChunk *chunkPtr;
int i, x, w;
Tk_Font tkfont;
TkFont *fontPtr;
if (index < 0) {
return 0;
}
layoutPtr = (TextLayout *) layout;
chunkPtr = layoutPtr->chunks;
tkfont = layoutPtr->tkfont;
fontPtr = (TkFont *) tkfont;
for (i = 0; i < layoutPtr->numChunks; i++) {
if (chunkPtr->numDisplayChars < 0) {
if (index == 0) {
x = chunkPtr->x;
w = chunkPtr->totalWidth;
goto check;
}
} else if (index < chunkPtr->numChars) {
if (xPtr != NULL) {
Tk_MeasureChars(tkfont, chunkPtr->start, index, 0, 0, &x);
x += chunkPtr->x;
}
if (widthPtr != NULL) {
Tk_MeasureChars(tkfont, chunkPtr->start + index, 1, 0, 0, &w);
}
goto check;
}
index -= chunkPtr->numChars;
chunkPtr++;
}
if (index == 0) {
/*
* Special case to get location just past last char in layout.
*/
chunkPtr--;
x = chunkPtr->x + chunkPtr->totalWidth;
w = 0;
} else {
return 0;
}
/*
* Ensure that the bbox lies within the text layout. This forces all
* chars that extend off the right edge of the text layout to have
* truncated widths, and all chars that are completely off the right
* edge of the text layout to peg to the edge and have 0 width.
*/
check:
if (yPtr != NULL) {
*yPtr = chunkPtr->y - fontPtr->fm.ascent;
}
if (heightPtr != NULL) {
*heightPtr = fontPtr->fm.ascent + fontPtr->fm.descent;
}
if (x > layoutPtr->width) {
x = layoutPtr->width;
}
if (xPtr != NULL) {
*xPtr = x;
}
if (widthPtr != NULL) {
if (x + w > layoutPtr->width) {
w = layoutPtr->width - x;
}
*widthPtr = w;
}
return 1;
}
/*
*---------------------------------------------------------------------------
*
* Tk_DistanceToTextLayout --
*
* Computes the distance in pixels from the given point to the
* given text layout. Non-displaying space characters that occur
* at the end of individual lines in the text layout are ignored
* for hit detection purposes.
*
* Results:
* The return value is 0 if the point (x, y) is inside the text
* layout. If the point isn't inside the text layout then the
* return value is the distance in pixels from the point to the
* text item.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
int
Tk_DistanceToTextLayout(layout, x, y)
Tk_TextLayout layout; /* Layout information, from a previous call
* to Tk_ComputeTextLayout(). */
int x, y; /* Coordinates of point to check, with
* respect to the upper-left corner of the
* text layout (in pixels). */
{
int i, x1, x2, y1, y2, xDiff, yDiff, dist, minDist, ascent, descent;
LayoutChunk *chunkPtr;
TextLayout *layoutPtr;
TkFont *fontPtr;
layoutPtr = (TextLayout *) layout;
fontPtr = (TkFont *) layoutPtr->tkfont;
ascent = fontPtr->fm.ascent;
descent = fontPtr->fm.descent;
minDist = 0;
chunkPtr = layoutPtr->chunks;
for (i = 0; i < layoutPtr->numChunks; i++) {
if (chunkPtr->start[0] == '\n') {
/*
* Newline characters are not counted when computing distance
* (but tab characters would still be considered).
*/
chunkPtr++;
continue;
}
x1 = chunkPtr->x;
y1 = chunkPtr->y - ascent;
x2 = chunkPtr->x + chunkPtr->displayWidth;
y2 = chunkPtr->y + descent;
if (x < x1) {
xDiff = x1 - x;
} else if (x >= x2) {
xDiff = x - x2 + 1;
} else {
xDiff = 0;
}
if (y < y1) {
yDiff = y1 - y;
} else if (y >= y2) {
yDiff = y - y2 + 1;
} else {
yDiff = 0;
}
if ((xDiff == 0) && (yDiff == 0)) {
return 0;
}
dist = (int) hypot((double) xDiff, (double) yDiff);
if ((dist < minDist) || (minDist == 0)) {
minDist = dist;
}
chunkPtr++;
}
return minDist;
}
/*
*---------------------------------------------------------------------------
*
* Tk_IntersectTextLayout --
*
* Determines whether a text layout lies entirely inside,
* entirely outside, or overlaps a given rectangle. Non-displaying
* space characters that occur at the end of individual lines in
* the text layout are ignored for intersection calculations.
*
* Results:
* The return value is -1 if the text layout is entirely outside of
* the rectangle, 0 if it overlaps, and 1 if it is entirely inside
* of the rectangle.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
int
Tk_IntersectTextLayout(layout, x, y, width, height)
Tk_TextLayout layout; /* Layout information, from a previous call
* to Tk_ComputeTextLayout(). */
int x, y; /* Upper-left hand corner, in pixels, of
* rectangular area to compare with text
* layout. Coordinates are with respect to
* the upper-left hand corner of the text
* layout itself. */
int width, height; /* The width and height of the above
* rectangular area, in pixels. */
{
int result, i, x1, y1, x2, y2;
TextLayout *layoutPtr;
LayoutChunk *chunkPtr;
TkFont *fontPtr;
int left, top, right, bottom;
/*
* Scan the chunks one at a time, seeing whether each is entirely in,
* entirely out, or overlapping the rectangle. If an overlap is
* detected, return immediately; otherwise wait until all chunks have
* been processed and see if they were all inside or all outside.
*/
layoutPtr = (TextLayout *) layout;
chunkPtr = layoutPtr->chunks;
fontPtr = (TkFont *) layoutPtr->tkfont;
left = x;
top = y;
right = x + width;
bottom = y + height;
result = 0;
for (i = 0; i < layoutPtr->numChunks; i++) {
if (chunkPtr->start[0] == '\n') {
/*
* Newline characters are not counted when computing area
* intersection (but tab characters would still be considered).
*/
chunkPtr++;
continue;
}
x1 = chunkPtr->x;
y1 = chunkPtr->y - fontPtr->fm.ascent;
x2 = chunkPtr->x + chunkPtr->displayWidth;
y2 = chunkPtr->y + fontPtr->fm.descent;
if ((right < x1) || (left >= x2)
|| (bottom < y1) || (top >= y2)) {
if (result == 1) {
return 0;
}
result = -1;
} else if ((x1 < left) || (x2 >= right)
|| (y1 < top) || (y2 >= bottom)) {
return 0;
} else if (result == -1) {
return 0;
} else {
result = 1;
}
chunkPtr++;
}
return result;
}
/*
*---------------------------------------------------------------------------
*
* Tk_TextLayoutToPostscript --
*
* Outputs the contents of a text layout in Postscript format.
* The set of lines in the text layout will be rendered by the user
* supplied Postscript function. The function should be of the form:
*
* justify x y string function --
*
* Justify is -1, 0, or 1, depending on whether the following string
* should be left, center, or right justified, x and y is the
* location for the origin of the string, string is the sequence
* of characters to be printed, and function is the name of the
* caller-provided function; the function should leave nothing
* on the stack.
*
* The meaning of the origin of the string (x and y) depends on
* the justification. For left justification, x is where the
* left edge of the string should appear. For center justification,
* x is where the center of the string should appear. And for right
* justification, x is where the right edge of the string should
* appear. This behavior is necessary because, for example, right
* justified text on the screen is justified with screen metrics.
* The same string needs to be justified with printer metrics on
* the printer to appear in the correct place with respect to other
* similarly justified strings. In all circumstances, y is the
* location of the baseline for the string.
*
* Results:
* Interp->result is modified to hold the Postscript code that
* will render the text layout.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
Tk_TextLayoutToPostscript(interp, layout)
Tcl_Interp *interp; /* Filled with Postscript code. */
Tk_TextLayout layout; /* The layout to be rendered. */
{
#define MAXUSE 128
char buf[MAXUSE+10];
LayoutChunk *chunkPtr;
int i, j, used, c, baseline;
TextLayout *layoutPtr;
layoutPtr = (TextLayout *) layout;
chunkPtr = layoutPtr->chunks;
baseline = chunkPtr->y;
used = 0;
buf[used++] = '(';
for (i = 0; i < layoutPtr->numChunks; i++) {
if (baseline != chunkPtr->y) {
buf[used++] = ')';
buf[used++] = '\n';
buf[used++] = '(';
baseline = chunkPtr->y;
}
if (chunkPtr->numDisplayChars <= 0) {
if (chunkPtr->start[0] == '\t') {
buf[used++] = '\\';
buf[used++] = 't';
}
} else {
for (j = 0; j < chunkPtr->numDisplayChars; j++) {
c = UCHAR(chunkPtr->start[j]);
if ((c == '(') || (c == ')') || (c == '\\') || (c < 0x20)
|| (c >= UCHAR(0x7f))) {
/*
* Tricky point: the "03" is necessary in the sprintf
* below, so that a full three digits of octal are
* always generated. Without the "03", a number
* following this sequence could be interpreted by
* Postscript as part of this sequence.
*/
sprintf(buf + used, "\\%03o", c);
used += 4;
} else {
buf[used++] = c;
}
if (used >= MAXUSE) {
buf[used] = '\0';
Tcl_AppendResult(interp, buf, (char *) NULL);
used = 0;
}
}
}
if (used >= MAXUSE) {
/*
* If there are a whole bunch of returns or tabs in a row,
* then buf[] could get filled up.
*/
buf[used] = '\0';
Tcl_AppendResult(interp, buf, (char *) NULL);
used = 0;
}
chunkPtr++;
}
buf[used++] = ')';
buf[used++] = '\n';
buf[used] = '\0';
Tcl_AppendResult(interp, buf, (char *) NULL);
}
/*
*---------------------------------------------------------------------------
*
* TkInitFontAttributes --
*
* Initialize the font attributes structure to contain sensible
* values. This must be called before using any other font
* attributes functions.
*
* Results:
* None.
*
* Side effects.
* None.
*
*---------------------------------------------------------------------------
*/
void
TkInitFontAttributes(faPtr)
TkFontAttributes *faPtr; /* The attributes structure to initialize. */
{
faPtr->family = NULL;
faPtr->pointsize = 0;
faPtr->weight = TK_FW_NORMAL;
faPtr->slant = TK_FS_ROMAN;
faPtr->underline = 0;
faPtr->overstrike = 0;
}
/*
*---------------------------------------------------------------------------
*
* ConfigAttributesObj --
*
* Process command line options to fill in fields of a properly
* initialized font attributes structure.
*
* Results:
* A standard Tcl return value. If TCL_ERROR is returned, an
* error message will be left in interp's result object.
*
* Side effects:
* The fields of the font attributes structure get filled in with
* information from argc/argv. If an error occurs while parsing,
* the font attributes structure will contain all modifications
* specified in the command line options up to the point of the
* error.
*
*---------------------------------------------------------------------------
*/
static int
ConfigAttributesObj(interp, tkwin, objc, objv, faPtr)
Tcl_Interp *interp; /* Interp for error return. */
Tk_Window tkwin; /* For display on which font will be used. */
int objc; /* Number of elements in argv. */
Tcl_Obj *CONST objv[]; /* Command line options. */
TkFontAttributes *faPtr; /* Font attributes structure whose fields
* are to be modified. Structure must already
* be properly initialized. */
{
int i, n, index;
Tcl_Obj *value;
char *option, *string;
if (objc & 1) {
string = Tcl_GetStringFromObj(objv[objc - 1], NULL);
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "missing value for \"",
string, "\" option", (char *) NULL);
return TCL_ERROR;
}
for (i = 0; i < objc; i += 2) {
option = Tcl_GetStringFromObj(objv[i], NULL);
value = objv[i + 1];
if (Tcl_GetIndexFromObj(interp, objv[i], fontOpt, "option", 1,
&index) != TCL_OK) {
return TCL_ERROR;
}
switch (index) {
case FONT_FAMILY:
string = Tcl_GetStringFromObj(value, NULL);
faPtr->family = Tk_GetUid(string);
break;
case FONT_SIZE:
if (Tcl_GetIntFromObj(interp, value, &n) != TCL_OK) {
return TCL_ERROR;
}
faPtr->pointsize = n;
break;
case FONT_WEIGHT:
string = Tcl_GetStringFromObj(value, NULL);
n = TkFindStateNum(interp, option, weightMap, string);
if (n == TK_FW_UNKNOWN) {
return TCL_ERROR;
}
faPtr->weight = n;
break;
case FONT_SLANT:
string = Tcl_GetStringFromObj(value, NULL);
n = TkFindStateNum(interp, option, slantMap, string);
if (n == TK_FS_UNKNOWN) {
return TCL_ERROR;
}
faPtr->slant = n;
break;
case FONT_UNDERLINE:
if (Tcl_GetBooleanFromObj(interp, value, &n) != TCL_OK) {
return TCL_ERROR;
}
faPtr->underline = n;
break;
case FONT_OVERSTRIKE:
if (Tcl_GetBooleanFromObj(interp, value, &n) != TCL_OK) {
return TCL_ERROR;
}
faPtr->overstrike = n;
break;
}
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* GetAttributeInfoObj --
*
* Return information about the font attributes as a Tcl list.
*
* Results:
* The return value is TCL_OK if the objPtr was non-NULL and
* specified a valid font attribute, TCL_ERROR otherwise. If TCL_OK
* is returned, the interp's result object is modified to hold a
* description of either the current value of a single option, or a
* list of all options and their current values for the given font
* attributes. If TCL_ERROR is returned, the interp's result is
* set to an error message describing that the objPtr did not refer
* to a valid option.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
static int
GetAttributeInfoObj(interp, faPtr, objPtr)
Tcl_Interp *interp; /* Interp to hold result. */
CONST TkFontAttributes *faPtr; /* The font attributes to inspect. */
Tcl_Obj *objPtr; /* If non-NULL, indicates the single
* option whose value is to be
* returned. Otherwise
* information is returned for
* all options. */
{
int i, index, start, end, num;
#ifdef SCM_CODE
int bool;
#endif
char *str;
Tcl_Obj *newPtr;
start = 0;
end = FONT_NUMFIELDS;
if (objPtr != NULL) {
if (Tcl_GetIndexFromObj(interp, objPtr, fontOpt, "option", 1,