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archie/tk4.2/mac/tkMacFont.c

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Update tcl/tk for tcl-dp
2024-05-27 16:40:40 +02:00
/*
* tkMacFont.c --
*
* This file maintains a database of looked-up fonts for the Tk
* toolkit, in order to avoid round-trips to the server to map
* font names to XFontStructs. It also provides several utility
* procedures for measuring and displaying text. Many of these
* routines use Mac specific calls.
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1996 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: @(#) tkMacFont.c 1.39 96/09/22 15:40:16
*/
#include "tkPort.h"
#include "tkInt.h"
#include "tkMacInt.h"
#include <Windows.h>
#include <Strings.h>
#include <Fonts.h>
#include <Resources.h>
/*
* This module caches extra information about fonts in addition to
* what X already provides. The extra information is used by the
* TkMeasureChars procedure, and consists of two parts: a type and
* a width. The type is one of the following:
*
* NORMAL: Standard character.
* TAB: Tab character: output enough space to
* get to next tab stop.
* NEWLINE: Newline character: don't output anything more
* on this line (character has infinite width).
* REPLACE: This character doesn't print: instead of
* displaying character, display a replacement
* sequence of the form "\xdd" where dd is the
* hex equivalent of the character.
* SKIP: Don't display anything for this character. This
* is only used where the font doesn't contain
* all the characters needed to generate
* replacement sequences.
* The width gives the total width of the displayed character or
* sequence: for replacement sequences, it gives the width of the
* sequence.
*/
#define NORMAL 1
#define TAB 2
#define NEWLINE 3
#define REPLACE 4
#define SKIP 5
/*
* Size of buffer used to measure a series of chars. Remember to make
* the array size BUF_SZ + 1.
*/
#define BUF_SZ 40
/*
* One of the following data structures exists for each font that is
* currently active. The structure is indexed with two hash tables,
* one based on font name and one based on XFontStruct address.
*/
typedef struct {
XFontStruct *fontStructPtr; /* X information about font. */
Display *display; /* Display to which font belongs. */
int refCount; /* Number of active uses of this font. */
char *types; /* Malloc'ed array giving types of all
* chars in the font (may be NULL). */
unsigned char *widths; /* Malloc'ed array giving widths of all
* chars in the font (may be NULL). */
int tabWidth; /* Width of tabs in this font. */
Tcl_HashEntry *nameHashPtr; /* Entry in name-based hash table (needed
* when deleting this structure). */
} TkFont;
/*
* Hash table for name -> TkFont mapping, and key structure used to
* index into that table:
*/
static Tcl_HashTable nameTable;
typedef struct {
Tk_Uid name; /* Name of font. */
Display *display; /* Display for which font is valid. */
} NameKey;
/*
* Hash table for font struct -> TkFont mapping. This table is
* indexed by the XFontStruct address.
*/
static Tcl_HashTable fontTable;
static int initialized = 0; /* 0 means static structures haven't been
* initialized yet. */
/*
* To speed up TkMeasureChars, the variables below keep the last
* mapping from (XFontStruct *) to (TkFont *).
*/
static TkFont *lastFontPtr = NULL;
static XFontStruct *lastFontStructPtr = NULL;
static GWorldPtr gWorld = NULL;
/*
* Characters used when displaying control sequences as their
* hex equivalents.
*/
static char hexChars[] = "0123456789abcdefx\\";
/*
* The following table maps some control characters to sequences
* like '\n' rather than '\x10'. A zero entry in the table means
* no such mapping exists, and the table only maps characters
* less than 0x10.
*/
static char mapChars[] = {
0, 0, 0, 0, 0, 0, 0,
'a', 'b', 't', 'n', 'v', 'f', 'r',
0
};
/*
* The Macintosh doesn't have have a notion of Font objects like Unix
* and Windows does. These datastructures are used to help create such
* a notion.
*/
static Tcl_HashTable macFontTable;
static int macFontInit = 0; /* 0 means static structures haven't been
* initialized yet. */
typedef struct {
int txFont; /* Name of font family. */
int txFace; /* The style of font. */
int txSize; /* Point Size. */
} FontKey;
/*
* Forward declarations for procedures defined in this file:
*/
static void AllocTempGWorld _ANSI_ARGS_((void));
static void FontInit _ANSI_ARGS_((void));
static void SetFontMetrics _ANSI_ARGS_((TkFont *fontPtr));
static void MacFontInit _ANSI_ARGS_((void));
static int XNameToFont _ANSI_ARGS_((_Xconst char *name,
short *family, short *style, short *size));
/*
*----------------------------------------------------------------------
*
* Tk_GetFontStruct --
*
* Given a string name for a font, map the name to an XFontStruct
* describing the font.
*
* Results:
* The return value is normally a pointer to the font description
* for the desired font. If an error occurs in mapping the string
* to a font, then an error message will be left in interp->result
* and NULL will be returned.
*
* 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_FreeFontStruct, so that the database is cleaned up when fonts
* aren't in use anymore.
*
*----------------------------------------------------------------------
*/
XFontStruct *
Tk_GetFontStruct(interp, tkwin, name)
Tcl_Interp *interp; /* Place to leave error message if
* font can't be found. */
Tk_Window tkwin; /* Window in which font will be used. */
Tk_Uid name; /* Name of font (in form suitable for
* passing to XLoadQueryFont). */
{
NameKey nameKey;
Tcl_HashEntry *nameHashPtr, *fontHashPtr;
int new;
register TkFont *fontPtr;
XFontStruct *fontStructPtr;
if (!initialized) {
FontInit();
}
/*
* First, check to see if there's already a mapping for this font
* name.
*/
nameKey.name = name;
nameKey.display = Tk_Display(tkwin);
nameHashPtr = Tcl_CreateHashEntry(&nameTable, (char *) &nameKey, &new);
if (!new) {
fontPtr = (TkFont *) Tcl_GetHashValue(nameHashPtr);
fontPtr->refCount++;
return fontPtr->fontStructPtr;
}
/*
* The name isn't currently known. Map from the name to a font, and
* add a new structure to the database.
*/
fontStructPtr = XLoadQueryFont(nameKey.display, name);
if (fontStructPtr == NULL) {
Tcl_DeleteHashEntry(nameHashPtr);
Tcl_AppendResult(interp, "font \"", name, "\" doesn't exist",
(char *) NULL);
return NULL;
}
fontPtr = (TkFont *) ckalloc(sizeof(TkFont));
fontPtr->display = nameKey.display;
fontPtr->fontStructPtr = fontStructPtr;
fontPtr->refCount = 1;
fontPtr->types = NULL;
fontPtr->widths = NULL;
fontPtr->nameHashPtr = nameHashPtr;
fontHashPtr = Tcl_CreateHashEntry(&fontTable, (char *) fontStructPtr, &new);
if (!new) {
panic("XFontStruct already registered in Tk_GetFontStruct");
}
Tcl_SetHashValue(nameHashPtr, fontPtr);
Tcl_SetHashValue(fontHashPtr, fontPtr);
return fontPtr->fontStructPtr;
}
/*
*--------------------------------------------------------------
*
* Tk_NameOfFontStruct --
*
* Given a font, return a textual string identifying it.
*
* Results:
* If font was created by Tk_GetFontStruct, then the return
* value is the "string" that was used to create it.
* Otherwise the return value is a string giving the X
* identifier for the font. The storage for the returned
* string is only guaranteed to persist up until the next
* call to this procedure.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
char *
Tk_NameOfFontStruct(fontStructPtr)
XFontStruct *fontStructPtr; /* Font whose name is desired. */
{
Tcl_HashEntry *fontHashPtr;
TkFont *fontPtr;
static char string[20];
if (!initialized) {
printid:
sprintf(string, "font id 0x%x", (unsigned int) fontStructPtr->fid);
return string;
}
fontHashPtr = Tcl_FindHashEntry(&fontTable, (char *) fontStructPtr);
if (fontHashPtr == NULL) {
goto printid;
}
fontPtr = (TkFont *) Tcl_GetHashValue(fontHashPtr);
return ((NameKey *) fontPtr->nameHashPtr->key.words)->name;
}
/*
*----------------------------------------------------------------------
*
* Tk_FreeFontStruct --
*
* This procedure is called to release a font allocated by
* Tk_GetFontStruct.
*
* Results:
* None.
*
* Side effects:
* The reference count associated with font is decremented, and
* the font is officially deallocated if no-one is using it
* anymore.
*
*----------------------------------------------------------------------
*/
void
Tk_FreeFontStruct(fontStructPtr)
XFontStruct *fontStructPtr; /* Font to be released. */
{
Tcl_HashEntry *fontHashPtr;
register TkFont *fontPtr;
if (!initialized) {
panic("Tk_FreeFontStruct called before Tk_GetFontStruct");
}
fontHashPtr = Tcl_FindHashEntry(&fontTable, (char *) fontStructPtr);
if (fontHashPtr == NULL) {
panic("Tk_FreeFontStruct received unknown font argument");
}
fontPtr = (TkFont *) Tcl_GetHashValue(fontHashPtr);
fontPtr->refCount--;
if (fontPtr->refCount == 0) {
/*
* We really should call Tk_FreeXId below to release the font's
* resource identifier, but this seems to cause problems on
* many X servers (as of 5/1/94) where the font resource isn't
* really released, which can cause the wrong font to be used
* later on. So, don't release the resource id after all, even
* though this results in an id leak.
*
* Tk_FreeXId(fontPtr->display, (XID) fontPtr->fontStructPtr->fid);
*/
XFreeFont(fontPtr->display, fontPtr->fontStructPtr);
Tcl_DeleteHashEntry(fontPtr->nameHashPtr);
Tcl_DeleteHashEntry(fontHashPtr);
if (fontPtr->types != NULL) {
ckfree(fontPtr->types);
}
if (fontPtr->widths != NULL) {
ckfree((char *) fontPtr->widths);
}
ckfree((char *) fontPtr);
lastFontStructPtr = NULL;
}
}
/*
*----------------------------------------------------------------------
*
* FontInit --
*
* Initialize the structure used for font management.
*
* Results:
* None.
*
* Side effects:
* Read the code.
*
*----------------------------------------------------------------------
*/
static void
FontInit()
{
initialized = 1;
Tcl_InitHashTable(&nameTable, sizeof(NameKey)/sizeof(int));
Tcl_InitHashTable(&fontTable, TCL_ONE_WORD_KEYS);
}
/*
*--------------------------------------------------------------
*
* SetFontMetrics --
*
* This procedure is called to fill in the "widths" and "types"
* arrays for a font.
*
* Results:
* None.
*
* Side effects:
* FontPtr gets modified to hold font metric information.
*
*--------------------------------------------------------------
*/
static void
SetFontMetrics(fontPtr)
register TkFont *fontPtr; /* Font structure in which to
* set metrics. */
{
int i, replaceOK, baseWidth, len;
register XFontStruct *fontStructPtr = fontPtr->fontStructPtr;
short widths[10];
char replace[10];
char *p, c;
CGrafPtr saveWorld;
GDHandle saveDevice;
if (gWorld == NULL) {
AllocTempGWorld();
}
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(gWorld, NULL);
TextFont((short) fontStructPtr->min_byte1);
TextSize((short) fontStructPtr->max_byte1);
TextFace((short) fontStructPtr->min_char_or_byte2);
/*
* Pass 1: initialize the arrays.
*/
fontPtr->types = (char *) ckalloc(256);
fontPtr->widths = (unsigned char *) ckalloc(256);
for (i = 0; i < 256; i++) {
fontPtr->types[i] = REPLACE;
}
/*
* Pass 2: for all characters that exist in the font and are
* not control characters, fill in the type and width
* information.
*/
for (i = ' '; i < 256; i++) {
if ((i == 0177) || (i > fontStructPtr->max_char_or_byte2)) {
continue;
}
fontPtr->types[i] = NORMAL;
c = i & 0xff;
fontPtr->widths[i] = (unsigned char) CharWidth(c);
}
/*
* Pass 3: fill in information for characters that have to
* be replaced with "\xhh" strings. If the font doesn't
* have the characters needed for this, then just use the
* font's default character.
*/
replaceOK = 1;
baseWidth = fontPtr->widths['\\'] + fontPtr->widths['x'];
replace[0] = '\\';
for (p = hexChars; *p != 0; p++) {
if (fontPtr->types[*p] != NORMAL) {
replaceOK = 0;
break;
}
}
for (i = 0; i < 256; i++) {
if (fontPtr->types[i] != REPLACE) {
continue;
}
if (replaceOK) {
if ((i < sizeof(mapChars)) && (mapChars[i] != 0)) {
replace[1] = mapChars[i];
len = 2;
} else {
replace[1] = 'x';
replace[2] = hexChars[(i >> 4) & 0xf];
replace[3] = hexChars[i & 0xf];
len = 4;
}
TkGetCharPositions(fontPtr->fontStructPtr, replace, len, widths);
fontPtr->widths[i] = widths[len];
} else {
fontPtr->types[i] = SKIP;
fontPtr->widths[i] = 0;
}
}
/*
* Lastly, fill in special information for newline and tab.
*/
fontPtr->types['\n'] = NEWLINE;
fontPtr->widths['\n'] = 0;
fontPtr->types['\r'] = NEWLINE;
fontPtr->widths['\r'] = 0;
fontPtr->types['\t'] = TAB;
fontPtr->widths['\t'] = 0;
if (fontPtr->types['0'] == NORMAL) {
fontPtr->tabWidth = 8*fontPtr->widths['0'];
} else {
fontPtr->tabWidth = 8*fontStructPtr->max_bounds.width;
}
/*
* 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;
}
SetGWorld(saveWorld, saveDevice);
}
/*
*--------------------------------------------------------------
*
* TkMeasureChars --
*
* Measure the number of characters from a string that
* will fit in a given horizontal span. The measurement
* is done under the assumption that TkDisplayChars will
* be used to actually display the characters.
*
* Note: this is one of the slowest funcrtions on the Mac
* version of Tk. We should probably try to optimize for
* certain cases - like fixed sized fonts.
*
* Results:
* The return value is the number of characters from source
* that fit in the span given by startX and maxX. *nextXPtr
* is filled in with the x-coordinate at which the first
* character that didn't fit would be drawn, if it were to
* be drawn.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
int
TkMeasureChars(fontStructPtr, source, maxChars, startX, maxX,
tabOrigin, flags, nextXPtr)
XFontStruct *fontStructPtr; /* Font in which to draw characters. */
char *source; /* Characters to be displayed. Need not
* be NULL-terminated. */
int maxChars; /* Maximum # of characters to consider from
* source. */
int startX; /* X-position at which first character will
* be drawn. */
int maxX; /* Don't consider any character that would
* cross this x-position. */
int tabOrigin; /* X-location that serves as "origin" for
* tab stops. */
int flags; /* Various flag bits OR-ed together.
* TK_WHOLE_WORDS means stop on a word boundary
* (just before a space character) if
* possible. TK_AT_LEAST_ONE means always
* return a value of at least one, even
* if the character doesn't fit.
* TK_PARTIAL_OK means it's OK to display only
* a part of the last character in the line.
* TK_NEWLINES_NOT_SPECIAL means that newlines
* are treated just like other control chars:
* they don't terminate the line,*/
int *nextXPtr; /* Return x-position of terminating
* character here. */
{
register TkFont *fontPtr;
register char *p; /* Current character. */
register int c;
char *term; /* Pointer to most recent character that
* may legally be a terminating character. */
int termX; /* X-position just after term. */
int curX; /* X-position corresponding to p. */
int newX; /* X-position corresponding to p+1. */
int type;
int norm; /* Index into widths array */
int rem;
short widths[BUF_SZ+1]; /* Array of normal characters. */
/*
* Find the TkFont structure for this font, and make sure its
* font metrics exist.
*/
if (lastFontStructPtr == fontStructPtr) {
fontPtr = lastFontPtr;
} else {
Tcl_HashEntry *fontHashPtr;
if (!initialized) {
badArg:
panic("TkMeasureChars received unknown font argument");
}
fontHashPtr = Tcl_FindHashEntry(&fontTable, (char *) fontStructPtr);
if (fontHashPtr == NULL) {
goto badArg;
}
fontPtr = (TkFont *) Tcl_GetHashValue(fontHashPtr);
lastFontStructPtr = fontPtr->fontStructPtr;
lastFontPtr = fontPtr;
}
if (fontPtr->types == NULL) {
SetFontMetrics(fontPtr);
}
/*
* Scan the input string one character at a time, until a character
* is found that crosses maxX.
*/
norm = -1;
newX = curX = startX;
termX = 0; /* Not needed, but eliminates compiler warning. */
term = source;
for (p = source, c = *p & 0xff; maxChars > 0; p++, maxChars--) {
type = fontPtr->types[c];
if (type == NORMAL) {
if (norm == -1) {
TkGetCharPositions(fontPtr->fontStructPtr, p,
(BUF_SZ < maxChars) ? BUF_SZ : maxChars, widths);
norm = 0;
} else if (norm >= BUF_SZ - 2) {
TkGetCharPositions(fontPtr->fontStructPtr, p-1,
(BUF_SZ < (maxChars+1)) ? BUF_SZ : (maxChars+1), widths);
norm = 1;
} else {
norm++;
}
} else {
norm = -1;
}
if (type == NORMAL) {
newX += widths[norm+1] - widths[norm];
} else if (type == REPLACE) {
newX += fontPtr->widths[c];
} else if (type == TAB) {
if (!(flags & TK_IGNORE_TABS)) {
newX += fontPtr->tabWidth;
rem = (newX - tabOrigin) % fontPtr->tabWidth;
if (rem < 0) {
rem += fontPtr->tabWidth;
}
newX -= rem;
}
} else if (type == NEWLINE) {
if (flags & TK_NEWLINES_NOT_SPECIAL) {
newX += fontPtr->widths[c];
} else {
break;
}
} else if (type != SKIP) {
panic("Unknown type %d in TkMeasureChars", type);
}
if (newX > maxX) {
break;
}
c = p[1] & 0xff;
if (isspace(UCHAR(c)) || (c == 0)) {
term = p+1;
termX = newX;
}
curX = newX;
}
/*
* P points to the first character that doesn't fit in the desired
* span. Use the flags to figure out what to return.
*/
if ((flags & TK_PARTIAL_OK) && (curX < maxX)) {
curX = newX;
p++;
}
if ((flags & TK_AT_LEAST_ONE) && (term == source) && (maxChars > 0)
&& !isspace(UCHAR(*term))) {
term = p;
termX = curX;
if (term == source) {
term++;
termX = newX;
}
} else if ((maxChars == 0) || !(flags & TK_WHOLE_WORDS)) {
term = p;
termX = curX;
}
*nextXPtr = termX;
return term-source;
}
/*
*--------------------------------------------------------------
*
* TkDisplayChars --
*
* Draw a string of characters on the screen, converting
* tabs to the right number of spaces and control characters
* to sequences of the form "\xhh" where hh are two hex
* digits.
*
* Results:
* None.
*
* Side effects:
* Information gets drawn on the screen.
*
*--------------------------------------------------------------
*/
void
TkDisplayChars(display, drawable, gc, fontStructPtr, string, numChars,
x, y, tabOrigin, flags)
Display *display; /* Display on which to draw. */
Drawable drawable; /* Window or pixmap in which to draw. */
GC gc; /* Graphics context for actually drawing
* characters. */
XFontStruct *fontStructPtr; /* Font used in GC; must have been allocated
* by Tk_GetFontStruct. Used to compute sizes
* of tabs, etc. */
char *string; /* Characters to be displayed. */
int numChars; /* Number of characters to display from
* string. */
int x, y; /* Coordinates at which to draw string. */
int tabOrigin; /* X-location that serves as "origin" for
* tab stops. */
int flags; /* Flags to control display. Only
* TK_NEWLINES_NOT_SPECIAL is supported right
* now. See TkMeasureChars for information
* about it. */
{
register TkFont *fontPtr;
register char *p; /* Current character being scanned. */
register int c;
int type;
char *start; /* First character waiting to be displayed. */
int startX; /* X-coordinate corresponding to start. */
int curX; /* X-coordinate corresponding to p. */
char replace[10];
int rem;
/*
* Find the TkFont structure for this font, and make sure its
* font metrics exist.
*/
if (lastFontStructPtr == fontStructPtr) {
fontPtr = lastFontPtr;
} else {
Tcl_HashEntry *fontHashPtr;
if (!initialized) {
badArg:
panic("TkDisplayChars received unknown font argument");
}
fontHashPtr = Tcl_FindHashEntry(&fontTable, (char *) fontStructPtr);
if (fontHashPtr == NULL) {
goto badArg;
}
fontPtr = (TkFont *) Tcl_GetHashValue(fontHashPtr);
lastFontStructPtr = fontPtr->fontStructPtr;
lastFontPtr = fontPtr;
}
if (fontPtr->types == NULL) {
SetFontMetrics(fontPtr);
}
/*
* Scan the string one character at a time. Display control
* characters immediately, but delay displaying normal characters
* in order to pass many characters to the server all together.
*/
startX = curX = x;
start = string;
for (p = string; numChars > 0; numChars--, p++) {
c = *p & 0xff;
type = fontPtr->types[c];
if (type == NORMAL) {
continue;
}
if (p != start) {
curX += XTextWidth(fontPtr->fontStructPtr, start, p - start);
XDrawString(display, drawable, gc, startX, y, start, p - start);
startX = curX;
}
if (type == TAB) {
curX += fontPtr->tabWidth;
rem = (curX - tabOrigin) % fontPtr->tabWidth;
if (rem < 0) {
rem += fontPtr->tabWidth;
}
curX -= rem;
} else if (type == REPLACE ||
(type == NEWLINE && flags & TK_NEWLINES_NOT_SPECIAL)) {
if ((c < sizeof(mapChars)) && (mapChars[c] != 0)) {
replace[0] = '\\';
replace[1] = mapChars[c];
XDrawString(display, drawable, gc, startX, y, replace, 2);
curX += fontPtr->widths[c];
} else {
replace[0] = '\\';
replace[1] = 'x';
replace[2] = hexChars[(c >> 4) & 0xf];
replace[3] = hexChars[c & 0xf];
XDrawString(display, drawable, gc, startX, y, replace, 4);
curX += fontPtr->widths[c];
}
} else if (type == NEWLINE) {
y += fontStructPtr->ascent + fontStructPtr->descent;
curX = x;
} else if (type != SKIP) {
panic("Unknown type %d in TkDisplayChars", type);
}
startX = curX;
start = p+1;
}
/*
* At the very end, there may be one last batch of normal characters
* to display.
*/
if (p != start) {
XDrawString(display, drawable, gc, startX, y, start, p - start);
}
}
/*
*----------------------------------------------------------------------
*
* TkUnderlineChars --
*
* This procedure draws an underline for a given range of characters
* in a given string, using appropriate information for the string's
* font. It doesn't draw the characters (which are assumed to have
* been displayed previously); it just draws the underline.
*
* Results:
* None.
*
* Side effects:
* Information gets displayed in "drawable".
*
*----------------------------------------------------------------------
*/
void
TkUnderlineChars(display, drawable, gc, fontStructPtr, string, x, y,
tabOrigin, flags, 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
* underline. */
XFontStruct *fontStructPtr; /* Font used in GC; must have been allocated
* by Tk_GetFontStruct. Used to character
* dimensions, etc. */
char *string; /* String containing characters to be
* underlined. */
int x, y; /* Coordinates at which first character of
* string is drawn. */
int tabOrigin; /* X-location that serves as "origin" for
* tab stops. */
int flags; /* Flags that were passed to TkDisplayChars. */
int firstChar; /* Index of first character to underline. */
int lastChar; /* Index of last character to underline. */
{
int xUnder, yUnder, width, height;
unsigned long value;
/*
* First compute the vertical span of the underline, using font
* properties if they exist.
*/
if (XGetFontProperty(fontStructPtr, XA_UNDERLINE_POSITION, &value)) {
yUnder = y + value;
} else {
yUnder = y + fontStructPtr->max_bounds.descent/2;
}
if (XGetFontProperty(fontStructPtr, XA_UNDERLINE_THICKNESS, &value)) {
height = value;
} else {
height = 2;
}
/*
* Now compute the horizontal span of the underline.
*/
TkMeasureChars(fontStructPtr, string, firstChar, x, (int) 1000000,
tabOrigin, flags, &xUnder);
TkMeasureChars(fontStructPtr, string+firstChar, lastChar+1-firstChar,
xUnder, (int) 1000000, tabOrigin, flags, &width);
width -= xUnder;
XFillRectangle(display, drawable, gc, xUnder, yUnder,
(unsigned int) width, (unsigned int) height);
}
/*
*----------------------------------------------------------------------
*
* TkComputeTextGeometry --
*
* This procedure computes the amount of screen space needed to
* display a multi-line string of text.
*
* Results:
* There is no return value. The dimensions of the screen area
* needed to display the text are returned in *widthPtr, and *heightPtr.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TkComputeTextGeometry(fontStructPtr, string, numChars, wrapLength,
widthPtr, heightPtr)
XFontStruct *fontStructPtr; /* Font that will be used to display text. */
char *string; /* String whose dimensions are to be
* computed. */
int numChars; /* Number of characters to consider from
* string. */
int wrapLength; /* Longest permissible line length, in
* pixels. <= 0 means no automatic wrapping:
* just let lines get as long as needed. */
int *widthPtr; /* Store width of string here. */
int *heightPtr; /* Store height of string here. */
{
int thisWidth, maxWidth, numLines;
char *p;
if (wrapLength <= 0) {
wrapLength = INT_MAX;
}
maxWidth = 0;
for (numLines = 1, p = string; (p - string) < numChars; numLines++) {
p += TkMeasureChars(fontStructPtr, p, numChars - (p - string), 0,
wrapLength, 0, TK_WHOLE_WORDS|TK_AT_LEAST_ONE, &thisWidth);
if (thisWidth > maxWidth) {
maxWidth = thisWidth;
}
if (*p == 0) {
break;
}
/*
* If the character that didn't fit in this line was a white
* space character then skip it.
*/
if (isspace(UCHAR(*p))) {
p++;
}
}
*widthPtr = maxWidth;
*heightPtr = numLines * (fontStructPtr->ascent + fontStructPtr->descent);
}
/*
*----------------------------------------------------------------------
*
* TkDisplayText --
*
* description.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TkDisplayText(display, drawable, fontStructPtr, string, numChars, x, y,
length, justify, underline, gc)
Display *display; /* X display to use for drawing text. */
Drawable drawable; /* Window or pixmapin which to draw the
* text. */
XFontStruct *fontStructPtr; /* Font that determines geometry of text
* (should be same as font in gc). */
char *string; /* String to display; may contain embedded
* newlines. */
int numChars; /* Number of characters to use from string. */
int x, y; /* Pixel coordinates within drawable of
* upper left corner of display area. */
int length; /* Line length in pixels; used to compute
* word wrap points and also for
* justification. Must be > 0. */
Tk_Justify justify; /* How to justify lines. */
int underline; /* Index of character to underline, or < 0
* for no underlining. */
GC gc; /* Graphics context to use for drawing text. */
{
char *p;
int charsThisLine, lengthThisLine, xThisLine;
/*
* Work through the string one line at a time. Display each line
* in four steps:
* 1. Compute the line's length.
* 2. Figure out where to display the line for justification.
* 3. Display the line.
* 4. Underline one character if needed.
*/
y += fontStructPtr->ascent;
for (p = string; numChars > 0; ) {
charsThisLine = TkMeasureChars(fontStructPtr, p, numChars, 0, length,
0, TK_WHOLE_WORDS|TK_AT_LEAST_ONE, &lengthThisLine);
if (justify == TK_JUSTIFY_LEFT) {
xThisLine = x;
} else if (justify == TK_JUSTIFY_CENTER) {
xThisLine = x + (length - lengthThisLine)/2;
} else {
xThisLine = x + (length - lengthThisLine);
}
TkDisplayChars(display, drawable, gc, fontStructPtr, p, charsThisLine,
xThisLine, y, xThisLine, 0);
if ((underline >= 0) && (underline < charsThisLine)) {
TkUnderlineChars(display, drawable, gc, fontStructPtr, p,
xThisLine, y, xThisLine, 0, underline, underline);
}
p += charsThisLine;
numChars -= charsThisLine;
underline -= charsThisLine;
y += fontStructPtr->ascent + fontStructPtr->descent;
/*
* If the character that didn't fit was a space character, skip it.
*/
if (isspace(UCHAR(*p))) {
p++;
numChars--;
underline--;
}
}
}
/*
*----------------------------------------------------------------------
*
* MacFontInit --
*
* Initialize the structure used for font management.
*
* Results:
* None.
*
* Side effects:
* Read the code.
*
*----------------------------------------------------------------------
*/
static void
MacFontInit()
{
macFontInit = 1;
Tcl_InitHashTable(&macFontTable, sizeof(FontKey)/sizeof(int));
}
/*
*----------------------------------------------------------------------
*
* ParseFontName --
*
* Parse given font name into family, style & size.
*
* Results:
* None.
*
* Side effects:
* Read the code.
*
*----------------------------------------------------------------------
*/
static void
ParseFontName(name, family, style, size)
char *name;
short *family;
short *style;
short *size;
{
int argc, argc2, i, pointSize;
char **argv, **argv2;
Tcl_Interp *dummy;
/*
* We define are fant name to be a list of the following form:
* {family size {style list}}
*/
*family = 0;
*style = 0;
*size = 0;
dummy = Tcl_CreateInterp();
if (Tcl_SplitList(dummy, (char *) name, &argc, &argv) != TCL_OK) {
Tcl_DeleteInterp(dummy);
return;
}
c2pstr(argv[0]);
GetFNum((StringPtr) argv[0], family);
if (Tcl_GetInt(dummy, argv[1], &pointSize) != TCL_OK) {
ckfree((char*) argv);
Tcl_DeleteInterp(dummy);
return;
}
*size = (short) pointSize;
if (Tcl_SplitList(dummy, (char *) argv[2], &argc2, &argv2) != TCL_OK) {
ckfree((char*) argv);
Tcl_DeleteInterp(dummy);
return;
}
for (i = 0; i < argc2; i++) {
if (!strcmp(argv2[i], "normal")) {
*style = normal;
} else if (!strcmp(argv2[i], "bold")) {
*style |= bold;
} else if (!strcmp(argv2[i], "italic")) {
*style |= italic;
} else if (!strcmp(argv2[i], "underline")) {
*style |= underline;
} else if (!strcmp(argv2[i], "outline")) {
*style |= outline;
} else if (!strcmp(argv2[i], "shadow")) {
*style |= shadow;
} else if (!strcmp(argv2[i], "condense")) {
*style |= condense;
} else if (!strcmp(argv2[i], "extend")) {
*style |= extend;
} else {
/* ignore for now */
}
}
ckfree((char*) argv);
ckfree((char*) argv2);
Tcl_DeleteInterp(dummy);
}
/*
*----------------------------------------------------------------------
*
* XLoadFont --
*
* Get the font handle for the specified font.
*
* Results:
* Returns the font handle.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
Font
XLoadFont(display, name)
Display* display;
_Xconst char* name;
{
FontKey fontKey, *fontPtr;
Tcl_HashEntry *fontHashPtr;
int new, result;
short family;
short style;
short size;
if (!macFontInit) {
MacFontInit();
}
result = XNameToFont(name, &family, &style, &size);
if (result == false) {
ParseFontName(name, &family, &style, &size);
}
fontKey.txFont = family;
fontKey.txFace = style;
fontKey.txSize = size;
fontHashPtr = Tcl_CreateHashEntry(&macFontTable, (char *) &fontKey, &new);
if (!new) {
return (Font) Tcl_GetHashValue(fontHashPtr);
}
fontPtr = (FontKey *) ckalloc(sizeof(FontKey));
fontPtr->txFont = family;
fontPtr->txFace = style;
fontPtr->txSize = size;
Tcl_SetHashValue(fontHashPtr, fontPtr);
return (Font) fontPtr;
}
/*
*----------------------------------------------------------------------
*
* XQueryFont --
*
* Retrieve information about the specified font.
*
* Results:
* Returns a newly allocated XFontStruct.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
XFontStruct *
XQueryFont(display, font_ID)
Display* display;
XID font_ID;
{
XFontStruct *fontPtr;
XCharStruct bounds;
FontInfo fi;
int i;
FontKey *macFontPtr;
CGrafPtr saveWorld;
GDHandle saveDevice;
if (gWorld == NULL) {
AllocTempGWorld();
}
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(gWorld, NULL);
fontPtr = (XFontStruct *) ckalloc(sizeof(XFontStruct));
fontPtr->fid = font_ID;
macFontPtr = (FontKey *) font_ID;
TextFont((short) macFontPtr->txFont);
TextSize((short) macFontPtr->txSize);
TextFace((short) macFontPtr->txFace);
GetFontInfo(&fi);
fontPtr->direction = FontLeftToRight;
fontPtr->min_byte1 = 0;
fontPtr->max_byte1 = 0;
fontPtr->min_char_or_byte2 = 0; /* TODO */
fontPtr->max_char_or_byte2 = 256; /* TODO */
fontPtr->all_chars_exist = true;
fontPtr->default_char = 0; /* TODO */
fontPtr->n_properties = 0;
fontPtr->properties = NULL;
bounds.lbearing = 0;
bounds.rbearing = fi.widMax;
bounds.width = fi.widMax;
bounds.ascent = fi.ascent;
bounds.descent = fi.descent;
bounds.attributes = 0;
fontPtr->min_bounds = bounds;
fontPtr->max_bounds = bounds;
fontPtr->per_char = (XCharStruct *) ckalloc(sizeof(XCharStruct) * 1000);
for (i = 0; i < 1000; i++) {
fontPtr->per_char[i].lbearing = 0;
fontPtr->per_char[i].rbearing = fi.widMax;
fontPtr->per_char[i].width = fi.widMax;
fontPtr->per_char[i].ascent = fi.ascent;
fontPtr->per_char[i].descent = fi.descent;
}
fontPtr->ascent = fi.ascent;
fontPtr->descent = fi.descent;
/*
* Override these fields to hide Mac info
*/
fontPtr->min_byte1 = macFontPtr->txFont; /* txFont */
fontPtr->max_byte1 = macFontPtr->txSize; /* txSize */
fontPtr->min_char_or_byte2 = macFontPtr->txFace; /* txStyle */
SetGWorld(saveWorld, saveDevice);
return fontPtr;
}
/*
*----------------------------------------------------------------------
*
* XLoadQueryFont --
*
* Macintosh implementation of the X function XLoadQueryFont.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
XFontStruct *
XLoadQueryFont(display, name)
Display* display;
_Xconst char* name;
{
Font font;
font = XLoadFont(display, name);
return XQueryFont(display, font);
}
/*
*----------------------------------------------------------------------
*
* XTextExtents --
*
* Macintosh implementation of the X function XTextExtents.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
XTextExtents(font_struct, string, nchars, direction_return,
font_ascent_return, font_descent_return, overall_return)
XFontStruct* font_struct;
const char* string;
int nchars;
int* direction_return;
int* font_ascent_return;
int* font_descent_return;
XCharStruct* overall_return;
{
short int width;
CGrafPtr saveWorld;
GDHandle saveDevice;
if (gWorld == NULL) {
AllocTempGWorld();
}
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(gWorld, NULL);
TextFont((short) font_struct->min_byte1);
TextSize((short) font_struct->max_byte1);
TextFace((short) font_struct->min_char_or_byte2);
*direction_return = font_struct->direction;
*font_ascent_return = font_struct->ascent;
*font_descent_return = font_struct->descent;
width = TextWidth(string, (short) 0, (short) strlen(string));
overall_return->ascent = font_struct->ascent;
overall_return->descent = font_struct->descent;
overall_return->width = width;
overall_return->lbearing = 0;
overall_return->rbearing = width;
SetGWorld(saveWorld, saveDevice);
}
/*
*----------------------------------------------------------------------
*
* XTextWidth --
*
* Macintosh implementation of the X function XTextWidth.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
XTextWidth(font_struct, string, count)
XFontStruct* font_struct;
char* string;
int count;
{
int width;
CGrafPtr saveWorld;
GDHandle saveDevice;
if (gWorld == NULL) {
AllocTempGWorld();
}
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(gWorld, NULL);
TextFont((short) font_struct->min_byte1);
TextSize((short) font_struct->max_byte1);
TextFace((short) font_struct->min_char_or_byte2);
width = TextWidth(string, (short) 0, (short) count);
SetGWorld(saveWorld, saveDevice);
return width;
}
/*
*----------------------------------------------------------------------
*
* XFreeFont --
*
* Releases resources associated with the specified font.
*
* Results:
* None.
*
* Side effects:
* Frees the memory referenced by font_struct.
*
*----------------------------------------------------------------------
*/
void
XFreeFont(display, font_struct)
Display* display;
XFontStruct* font_struct;
{
if (font_struct != NULL) {
if (font_struct->per_char != NULL) {
ckfree((char *) font_struct->per_char);
}
ckfree((char *) font_struct);
}
}
/*
*----------------------------------------------------------------------
*
* XGetFontProperty --
*
* Called to get font properties. Since font properties are not
* supported under Windows, this function is a no-op.
*
* Results:
* Always returns false
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
Bool
XGetFontProperty(font_struct, atom, value_return)
XFontStruct* font_struct;
Atom atom;
unsigned long* value_return;
{
return False;
}
/*
*--------------------------------------------------------------
*
* TkGetCharPositions --
*
* Given a font and a string to print this function will
* return an array of shorts that point to the starting
* X position of each character in the string. The array
* will always start with zero.
*
* Results:
* The buffer array will be filled with X indexes.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
int
TkGetCharPositions(font_struct, string, count, buffer)
XFontStruct *font_struct; /* X information about font. */
char * string;
int count;
short *buffer;
{
CGrafPtr saveWorld;
GDHandle saveDevice;
if (gWorld == NULL) {
AllocTempGWorld();
}
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(gWorld, NULL);
TextFont((short) font_struct->min_byte1);
TextSize((short) font_struct->max_byte1);
TextFace((short) font_struct->min_char_or_byte2);
MeasureText((short) count, string, buffer);
SetGWorld(saveWorld, saveDevice);
return -1;
}
/*
*----------------------------------------------------------------------
*
* TkFontList --
*
* Creates a list of all the available fonts for this machine..
*
* Results:
* The interp will have the result set to a Tcl list containing
* all the available fonts for this machine.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TkFontList(interp, display)
Tcl_Interp *interp; /* Current interpreter. */
Display *display; /* X display to use for drawing text. */
{
int count, i;
short id;
Str255 theName;
ResType theType;
Handle handle;
Tcl_ResetResult(interp);
count = CountResources('FOND');
for (i = 1; i <= count; i++) {
handle = GetIndResource('FOND', i);
if (handle != NULL) {
HLock(handle);
GetResInfo(handle, &id, &theType, theName);
HUnlock(handle);
if (theName[0] == 0) {
continue;
}
theName[theName[0]+1] = '\0';
Tcl_AppendElement(interp, (char *) theName + 1);
}
}
count = CountResources('FONT');
for (i = 1; i <= count; i++) {
handle = GetIndResource('FONT', i);
if (handle != NULL) {
HLock(handle);
GetResInfo(handle, &id, &theType, theName);
HUnlock(handle);
GetResInfo(handle, &id, &theType, theName);
if (theName[0] == 0) {
continue;
}
theName[theName[0]+1] = '\0';
Tcl_AppendElement(interp, (char *) theName + 1);
}
}
}
/*
*----------------------------------------------------------------------
*
* TkMacFontInfo --
*
* Given a font id, return the family, style & size of the font.
*
* Results:
* None.
*
* Side effects:
* Read the code.
*
*----------------------------------------------------------------------
*/
void
TkMacFontInfo(font_ID, family, style, size)
Font font_ID;
short *family;
short *style;
short *size;
{
FontKey *macFontPtr;
macFontPtr = (FontKey *) font_ID;
*family = macFontPtr->txFont;
*style = macFontPtr->txFace;
*size = macFontPtr->txSize;
}
/*
*----------------------------------------------------------------------
*
* XNameToFont --
*
* This function constructs a logical font description from an
* X font name. This code only handles font names with all 13
* parts, although a part can be '*'.
*
* Results:
* Returns false if the font name was syntactically invalid,
* else true. Sets the fields of the passed in LOGFONT.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
XNameToFont(name, family, style, size)
_Xconst char *name;
short *family;
short *style;
short *size;
{
const char *head, *tail;
const char *field[13];
int flen[13];
int i, len;
char fontName[256];
/*
* Valid font name patterns must have a leading '-' or '*'.
*/
head = tail = name;
if (*tail == '-') {
head++; tail++;
} else if (*tail != '*') {
return False;
}
/*
* Identify field boundaries. Stores a pointer to the beginning
* of each field in field[i], and the length of the field in flen[i].
* Fields are separated by dashes. Each '*' becomes a field by itself.
*/
i = 0;
while (*tail != '\0' && i < 12) {
if (*tail == '-') {
flen[i] = tail - head;
field[i] = head;
tail++;
head = tail;
i++;
} else if (*tail == '*') {
len = tail - head;
if (len > 0) {
flen[i] = tail - head;
field[i] = head;
} else {
flen[i] = 1;
field[i] = head;
tail++;
if (*tail == '-') {
tail++;
}
}
head = tail;
i++;
} else {
tail++;
}
}
/*
* We handle the last field as a special case, since it may contain
* an emedded hyphen.
*/
flen[i] = strlen(head);
field[i] = head;
/*
* Bail if we don't have all of the fields.
*/
if (i != 12) {
return false;
}
/*
* Now fill in the logical font description from the fields we have
* identified.
*/
*family = 0;
*size = 0;
*style = 0;
/*
* Field 1: Foundry. Skip.
*/
/*
* Field 2: Font Family.
*/
i = 1;
if (!(flen[i] == 0 ||
(flen[i] == 1 && (field[i][0] == '*' || field[i][0] == '?')))) {
len = (flen[i] < 256) ? flen[i] : 256 - 1;
strncpy(fontName, field[i], len);
fontName[len] = '\0';
c2pstr(fontName);
GetFNum((StringPtr) fontName, family);
}
/*
* Field 3: Weight. Default is medium.
*/
i = 2;
if ((flen[i] > 0) && (strncasecmp((char *) field[i], "bold", flen[i]) ==
0)) {
*style |= bold;
}
/*
* Field 4: Slant. Default is Roman.
*/
i = 3;
if (!(flen[i] == 0 ||
(flen[i] == 1 && (field[i][0] == '*' || field[i][0] == '?')))) {
if (strncasecmp((char *) field[i], "r", flen[i]) == 0) {
/* Roman. Don't do anything */
} else if (strncasecmp((char *) field[i], "i", flen[i]) == 0) {
/* Italic */
*style |= italic;
} else if (strncasecmp((char *) field[i], "o", flen[i]) == 0) {
/* Oblique. Don't do anything */
} else if (strncasecmp((char *) field[i], "ri", flen[i]) == 0) {
/* Reverse Italic. Don't do anything */
} else if (strncasecmp((char *) field[i], "ro", flen[i]) == 0) {
/* Reverse Oblique. Don't do anything */
} else if (strncasecmp((char *) field[i], "ot", flen[i]) == 0) {
/* Other */
} else {
return false;
}
}
/*
* Field 5 & 6: Set Width & Blank. Skip.
*/
/*
* Field 7: Pixels. Use this as the points if no points set.
*/
i = 6;
if (!(flen[i] == 0 ||
(flen[i] == 1 && (field[i][0] == '*' || field[i][0] == '?')))) {
*size = atoi(field[i]);
}
/*
* Field 8: Points in tenths of a point.
*/
i = 7;
if (!(flen[i] == 0 ||
(flen[i] == 1 && (field[i][0] == '*' || field[i][0] == '?')))) {
*size = atoi(field[i]) / 10;
}
/*
* Field 9: Horizontal Resolution in DPI. Skip.
* Field 10: Vertical Resolution in DPI. Skip.
*/
/*
* Field 11: Spacing.
*/
i = 10;
if (!(flen[i] == 0 ||
(flen[i] == 1 && (field[i][0] == '*' || field[i][0] == '?'))))
{
if (flen[i] != 1) {
return false;
}
if (field[i][0] == 'p' || field[i][0] == 'P') {
} else if (field[i][0] == 'm' || field[i][0] == 'm' ||
field[i][0] == 'c' || field[i][0] == 'c') {
} else {
return false;
}
}
/*
* Field 12: Average Width.
*/
i = 11;
if (!(flen[i] == 0 ||
(flen[i] == 1 && (field[i][0] == '*' || field[i][0] == '?')))) {
}
/*
* Field 13: Character Set. Skip.
*/
return true;
}
/*
*----------------------------------------------------------------------
*
* AllocTempGWorld --
*
* Allocate a very small GWorld that can be used by the various
* routines in this file.
*
* Results:
* None.
*
* Side effects:
* Allocates a new GWorld.
*
*----------------------------------------------------------------------
*/
void
AllocTempGWorld()
{
Rect rect = {0, 0, 1, 1};
OSErr err;
err = NewGWorld(&gWorld, 0, &rect, NULL, NULL, 0);
if (err != noErr) {
panic("Out of memory: NewGWorld failed in Font code");
}
}
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