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putty/unix/gtkfont.c

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/*
* Unified font management for GTK.
*
* PuTTY is willing to use both old-style X server-side bitmap
* fonts _and_ GTK2/Pango client-side fonts. This requires us to
* do a bit of work to wrap the two wildly different APIs into
* forms the rest of the code can switch between seamlessly, and
* also requires a custom font selector capable of handling both
* types of font.
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include "putty.h"
#include "gtkfont.h"
#include "tree234.h"
/*
* Future work:
*
* - it would be nice to have a display of the current font name,
* and in particular whether it's client- or server-side,
* during the progress of the font selector.
*
* - it would be nice if we could move the processing of
* underline and VT100 double width into this module, so that
* instead of using the ghastly pixmap-stretching technique
* everywhere we could tell the Pango backend to scale its
* fonts to double size properly and at full resolution.
* However, this requires me to learn how to make Pango stretch
* text to an arbitrary aspect ratio (for double-width only
* text, which perversely is harder than DW+DH), and right now
* I haven't the energy.
*/
#if !GLIB_CHECK_VERSION(1,3,7)
#define g_ascii_strcasecmp g_strcasecmp
#define g_ascii_strncasecmp g_strncasecmp
#endif
/*
* Ad-hoc vtable mechanism to allow font structures to be
* polymorphic.
*
* Any instance of `unifont' used in the vtable functions will
* actually be the first element of a larger structure containing
* data specific to the subtype. This is permitted by the ISO C
* provision that one may safely cast between a pointer to a
* structure and a pointer to its first element.
*/
#define FONTFLAG_CLIENTSIDE 0x0001
#define FONTFLAG_SERVERSIDE 0x0002
#define FONTFLAG_SERVERALIAS 0x0004
#define FONTFLAG_NONMONOSPACED 0x0008
#define FONTFLAG_SORT_MASK 0x0007 /* used to disambiguate font families */
typedef void (*fontsel_add_entry)(void *ctx, const char *realfontname,
const char *family, const char *charset,
const char *style, const char *stylekey,
int size, int flags,
const struct unifont_vtable *fontclass);
struct unifont_vtable {
/*
* `Methods' of the `class'.
*/
unifont *(*create)(GtkWidget *widget, const char *name, int wide, int bold,
int shadowoffset, int shadowalways);
unifont *(*create_fallback)(GtkWidget *widget, int height, int wide,
int bold, int shadowoffset, int shadowalways);
void (*destroy)(unifont *font);
int (*has_glyph)(unifont *font, wchar_t glyph);
void (*draw_text)(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len, int wide,
int bold, int cellwidth);
void (*enum_fonts)(GtkWidget *widget,
fontsel_add_entry callback, void *callback_ctx);
char *(*canonify_fontname)(GtkWidget *widget, const char *name, int *size,
int *flags, int resolve_aliases);
char *(*scale_fontname)(GtkWidget *widget, const char *name, int size);
/*
* `Static data members' of the `class'.
*/
const char *prefix;
};
/* ----------------------------------------------------------------------
* X11 font implementation, directly using Xlib calls.
*/
static int x11font_has_glyph(unifont *font, wchar_t glyph);
static void x11font_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth);
static unifont *x11font_create(GtkWidget *widget, const char *name,
int wide, int bold,
int shadowoffset, int shadowalways);
static void x11font_destroy(unifont *font);
static void x11font_enum_fonts(GtkWidget *widget,
fontsel_add_entry callback, void *callback_ctx);
static char *x11font_canonify_fontname(GtkWidget *widget, const char *name,
int *size, int *flags,
int resolve_aliases);
static char *x11font_scale_fontname(GtkWidget *widget, const char *name,
int size);
struct x11font {
struct unifont u;
/*
* Actual font objects. We store a number of these, for
* automatically guessed bold and wide variants.
*
* The parallel array `allocated' indicates whether we've
* tried to fetch a subfont already (thus distinguishing NULL
* because we haven't tried yet from NULL because we tried and
* failed, so that we don't keep trying and failing
* subsequently).
*/
XFontStruct *fonts[4];
int allocated[4];
/*
* `sixteen_bit' is true iff the font object is indexed by
* values larger than a byte. That is, this flag tells us
* whether we use XDrawString or XDrawString16, etc.
*/
int sixteen_bit;
/*
* `variable' is true iff the font is non-fixed-pitch. This
* enables some code which takes greater care over character
* positioning during text drawing.
*/
int variable;
/*
* real_charset is the charset used when translating text into the
* font's internal encoding inside draw_text(). This need not be
* the same as the public_charset provided to the client; for
* example, public_charset might be CS_ISO8859_1 while
* real_charset is CS_ISO8859_1_X11.
*/
int real_charset;
/*
* Data passed in to unifont_create().
*/
int wide, bold, shadowoffset, shadowalways;
};
static const struct unifont_vtable x11font_vtable = {
x11font_create,
NULL, /* no fallback fonts in X11 */
x11font_destroy,
x11font_has_glyph,
x11font_draw_text,
x11font_enum_fonts,
x11font_canonify_fontname,
x11font_scale_fontname,
"server",
};
static char *x11_guess_derived_font_name(XFontStruct *xfs, int bold, int wide)
{
Display *disp = GDK_DISPLAY();
Atom fontprop = XInternAtom(disp, "FONT", False);
unsigned long ret;
if (XGetFontProperty(xfs, fontprop, &ret)) {
char *name = XGetAtomName(disp, (Atom)ret);
if (name && name[0] == '-') {
char *strings[13];
char *dupname, *extrafree = NULL, *ret;
char *p, *q;
int nstr;
p = q = dupname = dupstr(name); /* skip initial minus */
nstr = 0;
while (*p && nstr < lenof(strings)) {
if (*p == '-') {
*p = '\0';
strings[nstr++] = p+1;
}
p++;
}
if (nstr < lenof(strings)) {
sfree(dupname);
return NULL; /* XLFD was malformed */
}
if (bold)
strings[2] = "bold";
if (wide) {
/* 4 is `wideness', which obviously may have changed. */
/* 5 is additional style, which may be e.g. `ja' or `ko'. */
strings[4] = strings[5] = "*";
strings[11] = extrafree = dupprintf("%d", 2*atoi(strings[11]));
}
ret = dupcat("-", strings[ 0], "-", strings[ 1], "-", strings[ 2],
"-", strings[ 3], "-", strings[ 4], "-", strings[ 5],
"-", strings[ 6], "-", strings[ 7], "-", strings[ 8],
"-", strings[ 9], "-", strings[10], "-", strings[11],
"-", strings[12], NULL);
sfree(extrafree);
sfree(dupname);
return ret;
}
}
return NULL;
}
static int x11_font_width(XFontStruct *xfs, int sixteen_bit)
{
if (sixteen_bit) {
XChar2b space;
space.byte1 = 0;
space.byte2 = '0';
return XTextWidth16(xfs, &space, 1);
} else {
return XTextWidth(xfs, "0", 1);
}
}
static int x11_font_has_glyph(XFontStruct *xfs, int byte1, int byte2)
{
int index;
/*
* Not to be confused with x11font_has_glyph, which is a method of
* the x11font 'class' and hence takes a unifont as argument. This
* is the low-level function which grubs about in an actual
* XFontStruct to see if a given glyph exists.
*
* We must do this ourselves rather than letting Xlib's
* XTextExtents16 do the job, because XTextExtents will helpfully
* substitute the font's default_char for any missing glyph and
* not tell us it did so, which precisely won't help us find out
* which glyphs _are_ missing.
*
* The man page for XQueryFont is rather confusing about how the
* per_char array in the XFontStruct is laid out, because it gives
* formulae for determining the two-byte X character code _from_
* an index into the per_char array. Going the other way, it's
* rather simpler:
*
* The valid character codes have byte1 between min_byte1 and
* max_byte1 inclusive, and byte2 between min_char_or_byte2 and
* max_char_or_byte2 inclusive. This gives a rectangle of size
* (max_byte2-min_byte1+1) by
* (max_char_or_byte2-min_char_or_byte2+1), which is precisely the
* rectangle encoded in the per_char array. Hence, given a
* character code which is valid in the sense that it falls
* somewhere in that rectangle, its index in per_char is given by
* setting
*
* x = byte2 - min_char_or_byte2
* y = byte1 - min_byte1
* index = y * (max_char_or_byte2-min_char_or_byte2+1) + x
*
* If min_byte1 and min_byte2 are both zero, that's a special case
* which can be treated as if min_byte2 was 1 instead, i.e. the
* per_char array just runs from min_char_or_byte2 to
* max_char_or_byte2 inclusive, and byte1 should always be zero.
*/
if (byte2 < xfs->min_char_or_byte2 || byte2 > xfs->max_char_or_byte2)
return FALSE;
if (xfs->min_byte1 == 0 && xfs->max_byte1 == 0) {
index = byte2 - xfs->min_char_or_byte2;
} else {
if (byte1 < xfs->min_byte1 || byte1 > xfs->max_byte1)
return FALSE;
index = ((byte2 - xfs->min_char_or_byte2) +
((byte1 - xfs->min_byte1) *
(xfs->max_char_or_byte2 - xfs->min_char_or_byte2 + 1)));
}
if (!xfs->per_char) /* per_char NULL => everything in range exists */
return TRUE;
return (xfs->per_char[index].ascent + xfs->per_char[index].descent > 0 ||
xfs->per_char[index].width > 0);
}
static unifont *x11font_create(GtkWidget *widget, const char *name,
int wide, int bold,
int shadowoffset, int shadowalways)
{
struct x11font *xfont;
XFontStruct *xfs;
Display *disp = GDK_DISPLAY();
Atom charset_registry, charset_encoding, spacing;
unsigned long registry_ret, encoding_ret, spacing_ret;
int pubcs, realcs, sixteen_bit, variable;
int i;
xfs = XLoadQueryFont(disp, name);
if (!xfs)
return NULL;
charset_registry = XInternAtom(disp, "CHARSET_REGISTRY", False);
charset_encoding = XInternAtom(disp, "CHARSET_ENCODING", False);
pubcs = realcs = CS_NONE;
sixteen_bit = FALSE;
variable = TRUE;
if (XGetFontProperty(xfs, charset_registry, &registry_ret) &&
XGetFontProperty(xfs, charset_encoding, &encoding_ret)) {
char *reg, *enc;
reg = XGetAtomName(disp, (Atom)registry_ret);
enc = XGetAtomName(disp, (Atom)encoding_ret);
if (reg && enc) {
char *encoding = dupcat(reg, "-", enc, NULL);
pubcs = realcs = charset_from_xenc(encoding);
/*
* iso10646-1 is the only wide font encoding we
* support. In this case, we expect clients to give us
* UTF-8, which this module must internally convert
* into 16-bit Unicode.
*/
if (!strcasecmp(encoding, "iso10646-1")) {
sixteen_bit = TRUE;
pubcs = realcs = CS_UTF8;
}
/*
* Hack for X line-drawing characters: if the primary font
* is encoded as ISO-8859-1, and has valid glyphs in the
* low character positions, it is assumed that those
* glyphs are the VT100 line-drawing character set.
*/
if (pubcs == CS_ISO8859_1) {
int ch;
for (ch = 1; ch < 32; ch++)
if (!x11_font_has_glyph(xfs, 0, ch))
break;
if (ch == 32)
realcs = CS_ISO8859_1_X11;
}
sfree(encoding);
}
}
spacing = XInternAtom(disp, "SPACING", False);
if (XGetFontProperty(xfs, spacing, &spacing_ret)) {
char *spc;
spc = XGetAtomName(disp, (Atom)spacing_ret);
if (spc && strchr("CcMm", spc[0]))
variable = FALSE;
}
xfont = snew(struct x11font);
xfont->u.vt = &x11font_vtable;
xfont->u.width = x11_font_width(xfs, sixteen_bit);
xfont->u.ascent = xfs->ascent;
xfont->u.descent = xfs->descent;
xfont->u.height = xfont->u.ascent + xfont->u.descent;
xfont->u.public_charset = pubcs;
xfont->u.want_fallback = TRUE;
xfont->real_charset = realcs;
xfont->fonts[0] = xfs;
xfont->allocated[0] = TRUE;
xfont->sixteen_bit = sixteen_bit;
xfont->variable = variable;
xfont->wide = wide;
xfont->bold = bold;
xfont->shadowoffset = shadowoffset;
xfont->shadowalways = shadowalways;
for (i = 1; i < lenof(xfont->fonts); i++) {
xfont->fonts[i] = NULL;
xfont->allocated[i] = FALSE;
}
return (unifont *)xfont;
}
static void x11font_destroy(unifont *font)
{
Display *disp = GDK_DISPLAY();
struct x11font *xfont = (struct x11font *)font;
int i;
for (i = 0; i < lenof(xfont->fonts); i++)
if (xfont->fonts[i])
XFreeFont(disp, xfont->fonts[i]);
sfree(font);
}
static void x11_alloc_subfont(struct x11font *xfont, int sfid)
{
Display *disp = GDK_DISPLAY();
char *derived_name = x11_guess_derived_font_name
(xfont->fonts[0], sfid & 1, !!(sfid & 2));
xfont->fonts[sfid] = XLoadQueryFont(disp, derived_name);
xfont->allocated[sfid] = TRUE;
sfree(derived_name);
/* Note that xfont->fonts[sfid] may still be NULL, if XLQF failed. */
}
static int x11font_has_glyph(unifont *font, wchar_t glyph)
{
struct x11font *xfont = (struct x11font *)font;
if (xfont->sixteen_bit) {
/*
* This X font has 16-bit character indices, which means
* we can directly use our Unicode input value.
*/
return x11_font_has_glyph(xfont->fonts[0], glyph >> 8, glyph & 0xFF);
} else {
/*
* This X font has 8-bit indices, so we must convert to the
* appropriate character set.
*/
char sbstring[2];
int sblen = wc_to_mb(xfont->real_charset, 0, &glyph, 1,
sbstring, 2, "", NULL, NULL);
if (sblen == 0 || !sbstring[0])
return FALSE; /* not even in the charset */
return x11_font_has_glyph(xfont->fonts[0], 0,
(unsigned char)sbstring[0]);
}
}
#if !GTK_CHECK_VERSION(2,0,0)
#define GDK_DRAWABLE_XID(d) GDK_WINDOW_XWINDOW(d) /* GTK1's name for this */
#endif
static void x11font_really_draw_text_16(GdkDrawable *target, XFontStruct *xfs,
GC gc, int x, int y,
const XChar2b *string, int nchars,
int shadowoffset,
int fontvariable, int cellwidth)
{
Display *disp = GDK_DISPLAY();
int step, nsteps, centre;
if (fontvariable) {
/*
* In a variable-pitch font, we draw one character at a
* time, and centre it in the character cell.
*/
step = 1;
nsteps = nchars;
centre = TRUE;
} else {
/*
* In a fixed-pitch font, we can draw the whole lot in one go.
*/
step = nchars;
nsteps = 1;
centre = FALSE;
}
while (nsteps-- > 0) {
int X = x;
if (centre)
X += (cellwidth - XTextWidth16(xfs, string, step)) / 2;
XDrawString16(disp, GDK_DRAWABLE_XID(target), gc,
X, y, string, step);
if (shadowoffset)
XDrawString16(disp, GDK_DRAWABLE_XID(target), gc,
X + shadowoffset, y, string, step);
x += cellwidth;
string += step;
}
}
static void x11font_really_draw_text(GdkDrawable *target, XFontStruct *xfs,
GC gc, int x, int y,
const char *string, int nchars,
int shadowoffset,
int fontvariable, int cellwidth)
{
Display *disp = GDK_DISPLAY();
int step, nsteps, centre;
if (fontvariable) {
/*
* In a variable-pitch font, we draw one character at a
* time, and centre it in the character cell.
*/
step = 1;
nsteps = nchars;
centre = TRUE;
} else {
/*
* In a fixed-pitch font, we can draw the whole lot in one go.
*/
step = nchars;
nsteps = 1;
centre = FALSE;
}
while (nsteps-- > 0) {
int X = x;
if (centre)
X += (cellwidth - XTextWidth(xfs, string, step)) / 2;
XDrawString(disp, GDK_DRAWABLE_XID(target), gc,
X, y, string, step);
if (shadowoffset)
XDrawString(disp, GDK_DRAWABLE_XID(target), gc,
X + shadowoffset, y, string, step);
x += cellwidth;
string += step;
}
}
static void x11font_draw_text(GdkDrawable *target, GdkGC *gdkgc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth)
{
Display *disp = GDK_DISPLAY();
struct x11font *xfont = (struct x11font *)font;
GC gc = GDK_GC_XGC(gdkgc);
int sfid;
int shadowoffset = 0;
int mult = (wide ? 2 : 1);
wide -= xfont->wide;
bold -= xfont->bold;
/*
* Decide which subfont we're using, and whether we have to
* use shadow bold.
*/
if (xfont->shadowalways && bold) {
shadowoffset = xfont->shadowoffset;
bold = 0;
}
sfid = 2 * wide + bold;
if (!xfont->allocated[sfid])
x11_alloc_subfont(xfont, sfid);
if (bold && !xfont->fonts[sfid]) {
bold = 0;
shadowoffset = xfont->shadowoffset;
sfid = 2 * wide + bold;
if (!xfont->allocated[sfid])
x11_alloc_subfont(xfont, sfid);
}
if (!xfont->fonts[sfid])
return; /* we've tried our best, but no luck */
XSetFont(disp, gc, xfont->fonts[sfid]->fid);
if (xfont->sixteen_bit) {
/*
* This X font has 16-bit character indices, which means
* we can directly use our Unicode input string.
*/
XChar2b *xcs;
int i;
xcs = snewn(len, XChar2b);
for (i = 0; i < len; i++) {
xcs[i].byte1 = string[i] >> 8;
xcs[i].byte2 = string[i];
}
x11font_really_draw_text_16(target, xfont->fonts[sfid], gc, x, y,
xcs, len, shadowoffset,
xfont->variable, cellwidth * mult);
sfree(xcs);
} else {
/*
* This X font has 8-bit indices, so we must convert to the
* appropriate character set.
*/
char *sbstring = snewn(len+1, char);
int sblen = wc_to_mb(xfont->real_charset, 0, string, len,
sbstring, len+1, ".", NULL, NULL);
x11font_really_draw_text(target, xfont->fonts[sfid], gc, x, y,
sbstring, sblen, shadowoffset,
xfont->variable, cellwidth * mult);
sfree(sbstring);
}
}
static void x11font_enum_fonts(GtkWidget *widget,
fontsel_add_entry callback, void *callback_ctx)
{
char **fontnames;
char *tmp = NULL;
int nnames, i, max, tmpsize;
max = 32768;
while (1) {
fontnames = XListFonts(GDK_DISPLAY(), "*", max, &nnames);
if (nnames >= max) {
XFreeFontNames(fontnames);
max *= 2;
} else
break;
}
tmpsize = 0;
for (i = 0; i < nnames; i++) {
if (fontnames[i][0] == '-') {
/*
* Dismember an XLFD and convert it into the format
* we'll be using in the font selector.
*/
char *components[14];
char *p, *font, *style, *stylekey, *charset;
int j, weightkey, slantkey, setwidthkey;
int thistmpsize, fontsize, flags;
thistmpsize = 4 * strlen(fontnames[i]) + 256;
if (tmpsize < thistmpsize) {
tmpsize = thistmpsize;
tmp = sresize(tmp, tmpsize, char);
}
strcpy(tmp, fontnames[i]);
p = tmp;
for (j = 0; j < 14; j++) {
if (*p)
*p++ = '\0';
components[j] = p;
while (*p && *p != '-')
p++;
}
*p++ = '\0';
/*
* Font name is made up of fields 0 and 1, in reverse
* order with parentheses. (This is what the GTK 1.2 X
* font selector does, and it seems to come out
* looking reasonably sensible.)
*/
font = p;
p += 1 + sprintf(p, "%s (%s)", components[1], components[0]);
/*
* Charset is made up of fields 12 and 13.
*/
charset = p;
p += 1 + sprintf(p, "%s-%s", components[12], components[13]);
/*
* Style is a mixture of quite a lot of the fields,
* with some strange formatting.
*/
style = p;
p += sprintf(p, "%s", components[2][0] ? components[2] :
"regular");
if (!g_ascii_strcasecmp(components[3], "i"))
p += sprintf(p, " italic");
else if (!g_ascii_strcasecmp(components[3], "o"))
p += sprintf(p, " oblique");
else if (!g_ascii_strcasecmp(components[3], "ri"))
p += sprintf(p, " reverse italic");
else if (!g_ascii_strcasecmp(components[3], "ro"))
p += sprintf(p, " reverse oblique");
else if (!g_ascii_strcasecmp(components[3], "ot"))
p += sprintf(p, " other-slant");
if (components[4][0] && g_ascii_strcasecmp(components[4], "normal"))
p += sprintf(p, " %s", components[4]);
if (!g_ascii_strcasecmp(components[10], "m"))
p += sprintf(p, " [M]");
if (!g_ascii_strcasecmp(components[10], "c"))
p += sprintf(p, " [C]");
if (components[5][0])
p += sprintf(p, " %s", components[5]);
/*
* Style key is the same stuff as above, but with a
* couple of transformations done on it to make it
* sort more sensibly.
*/
p++;
stylekey = p;
if (!g_ascii_strcasecmp(components[2], "medium") ||
!g_ascii_strcasecmp(components[2], "regular") ||
!g_ascii_strcasecmp(components[2], "normal") ||
!g_ascii_strcasecmp(components[2], "book"))
weightkey = 0;
else if (!g_ascii_strncasecmp(components[2], "demi", 4) ||
!g_ascii_strncasecmp(components[2], "semi", 4))
weightkey = 1;
else
weightkey = 2;
if (!g_ascii_strcasecmp(components[3], "r"))
slantkey = 0;
else if (!g_ascii_strncasecmp(components[3], "r", 1))
slantkey = 2;
else
slantkey = 1;
if (!g_ascii_strcasecmp(components[4], "normal"))
setwidthkey = 0;
else
setwidthkey = 1;
p += sprintf(p, "%04d%04d%s%04d%04d%s%04d%04d%s%04d%s%04d%s",
weightkey,
(int)strlen(components[2]), components[2],
slantkey,
(int)strlen(components[3]), components[3],
setwidthkey,
(int)strlen(components[4]), components[4],
(int)strlen(components[10]), components[10],
(int)strlen(components[5]), components[5]);
assert(p - tmp < thistmpsize);
/*
* Size is in pixels, for our application, so we
* derive it directly from the pixel size field,
* number 6.
*/
fontsize = atoi(components[6]);
/*
* Flags: we need to know whether this is a monospaced
* font, which we do by examining the spacing field
* again.
*/
flags = FONTFLAG_SERVERSIDE;
if (!strchr("CcMm", components[10][0]))
flags |= FONTFLAG_NONMONOSPACED;
/*
* Not sure why, but sometimes the X server will
* deliver dummy font types in which fontsize comes
* out as zero. Filter those out.
*/
if (fontsize)
callback(callback_ctx, fontnames[i], font, charset,
style, stylekey, fontsize, flags, &x11font_vtable);
} else {
/*
* This isn't an XLFD, so it must be an alias.
* Transmit it with mostly null data.
*
* It would be nice to work out if it's monospaced
* here, but at the moment I can't see that being
* anything but computationally hideous. Ah well.
*/
callback(callback_ctx, fontnames[i], fontnames[i], NULL,
NULL, NULL, 0, FONTFLAG_SERVERALIAS, &x11font_vtable);
}
}
XFreeFontNames(fontnames);
}
static char *x11font_canonify_fontname(GtkWidget *widget, const char *name,
int *size, int *flags,
int resolve_aliases)
{
/*
* When given an X11 font name to try to make sense of for a
* font selector, we must attempt to load it (to see if it
* exists), and then canonify it by extracting its FONT
* property, which should give its full XLFD even if what we
* originally had was a wildcard.
*
* However, we must carefully avoid canonifying font
* _aliases_, unless specifically asked to, because the font
* selector treats them as worthwhile in their own right.
*/
XFontStruct *xfs;
Display *disp = GDK_DISPLAY();
Atom fontprop, fontprop2;
unsigned long ret;
xfs = XLoadQueryFont(disp, name);
if (!xfs)
return NULL; /* didn't make sense to us, sorry */
fontprop = XInternAtom(disp, "FONT", False);
if (XGetFontProperty(xfs, fontprop, &ret)) {
char *newname = XGetAtomName(disp, (Atom)ret);
if (newname) {
unsigned long fsize = 12;
fontprop2 = XInternAtom(disp, "PIXEL_SIZE", False);
if (XGetFontProperty(xfs, fontprop2, &fsize) && fsize > 0) {
*size = fsize;
XFreeFont(disp, xfs);
if (flags) {
if (name[0] == '-' || resolve_aliases)
*flags = FONTFLAG_SERVERSIDE;
else
*flags = FONTFLAG_SERVERALIAS;
}
return dupstr(name[0] == '-' || resolve_aliases ?
newname : name);
}
}
}
XFreeFont(disp, xfs);
return NULL; /* something went wrong */
}
static char *x11font_scale_fontname(GtkWidget *widget, const char *name,
int size)
{
return NULL; /* shan't */
}
#if GTK_CHECK_VERSION(2,0,0)
/* ----------------------------------------------------------------------
* Pango font implementation (for GTK 2 only).
*/
#if defined PANGO_PRE_1POINT4 && !defined PANGO_PRE_1POINT6
#define PANGO_PRE_1POINT6 /* make life easier for pre-1.4 folk */
#endif
static int pangofont_has_glyph(unifont *font, wchar_t glyph);
static void pangofont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth);
static unifont *pangofont_create(GtkWidget *widget, const char *name,
int wide, int bold,
int shadowoffset, int shadowalways);
static unifont *pangofont_create_fallback(GtkWidget *widget, int height,
int wide, int bold,
int shadowoffset, int shadowalways);
static void pangofont_destroy(unifont *font);
static void pangofont_enum_fonts(GtkWidget *widget, fontsel_add_entry callback,
void *callback_ctx);
static char *pangofont_canonify_fontname(GtkWidget *widget, const char *name,
int *size, int *flags,
int resolve_aliases);
static char *pangofont_scale_fontname(GtkWidget *widget, const char *name,
int size);
struct pangofont {
struct unifont u;
/*
* Pango objects.
*/
PangoFontDescription *desc;
PangoFontset *fset;
/*
* The containing widget.
*/
GtkWidget *widget;
/*
* Data passed in to unifont_create().
*/
int bold, shadowoffset, shadowalways;
};
static const struct unifont_vtable pangofont_vtable = {
pangofont_create,
pangofont_create_fallback,
pangofont_destroy,
pangofont_has_glyph,
pangofont_draw_text,
pangofont_enum_fonts,
pangofont_canonify_fontname,
pangofont_scale_fontname,
"client",
};
/*
* This function is used to rigorously validate a
* PangoFontDescription. Later versions of Pango have a nasty
* habit of accepting _any_ old string as input to
* pango_font_description_from_string and returning a font
* description which can actually be used to display text, even if
* they have to do it by falling back to their most default font.
* This is doubtless helpful in some situations, but not here,
* because we need to know if a Pango font string actually _makes
* sense_ in order to fall back to treating it as an X font name
* if it doesn't. So we check that the font family is actually one
* supported by Pango.
*/
static int pangofont_check_desc_makes_sense(PangoContext *ctx,
PangoFontDescription *desc)
{
#ifndef PANGO_PRE_1POINT6
PangoFontMap *map;
#endif
PangoFontFamily **families;
int i, nfamilies, matched;
/*
* Ask Pango for a list of font families, and iterate through
* them to see if one of them matches the family in the
* PangoFontDescription.
*/
#ifndef PANGO_PRE_1POINT6
map = pango_context_get_font_map(ctx);
if (!map)
return FALSE;
pango_font_map_list_families(map, &families, &nfamilies);
#else
pango_context_list_families(ctx, &families, &nfamilies);
#endif
matched = FALSE;
for (i = 0; i < nfamilies; i++) {
if (!g_ascii_strcasecmp(pango_font_family_get_name(families[i]),
pango_font_description_get_family(desc))) {
matched = TRUE;
break;
}
}
g_free(families);
return matched;
}
static unifont *pangofont_create_internal(GtkWidget *widget,
PangoContext *ctx,
PangoFontDescription *desc,
int wide, int bold,
int shadowoffset, int shadowalways)
{
struct pangofont *pfont;
#ifndef PANGO_PRE_1POINT6
PangoFontMap *map;
#endif
PangoFontset *fset;
PangoFontMetrics *metrics;
#ifndef PANGO_PRE_1POINT6
map = pango_context_get_font_map(ctx);
if (!map) {
pango_font_description_free(desc);
return NULL;
}
fset = pango_font_map_load_fontset(map, ctx, desc,
pango_context_get_language(ctx));
#else
fset = pango_context_load_fontset(ctx, desc,
pango_context_get_language(ctx));
#endif
if (!fset) {
pango_font_description_free(desc);
return NULL;
}
metrics = pango_fontset_get_metrics(fset);
if (!metrics ||
pango_font_metrics_get_approximate_digit_width(metrics) == 0) {
pango_font_description_free(desc);
g_object_unref(fset);
return NULL;
}
pfont = snew(struct pangofont);
pfont->u.vt = &pangofont_vtable;
pfont->u.width =
PANGO_PIXELS(pango_font_metrics_get_approximate_digit_width(metrics));
pfont->u.ascent = PANGO_PIXELS(pango_font_metrics_get_ascent(metrics));
pfont->u.descent = PANGO_PIXELS(pango_font_metrics_get_descent(metrics));
pfont->u.height = pfont->u.ascent + pfont->u.descent;
pfont->u.want_fallback = FALSE;
/* The Pango API is hardwired to UTF-8 */
pfont->u.public_charset = CS_UTF8;
pfont->desc = desc;
pfont->fset = fset;
pfont->widget = widget;
pfont->bold = bold;
pfont->shadowoffset = shadowoffset;
pfont->shadowalways = shadowalways;
pango_font_metrics_unref(metrics);
return (unifont *)pfont;
}
static unifont *pangofont_create(GtkWidget *widget, const char *name,
int wide, int bold,
int shadowoffset, int shadowalways)
{
PangoContext *ctx;
PangoFontDescription *desc;
desc = pango_font_description_from_string(name);
if (!desc)
return NULL;
ctx = gtk_widget_get_pango_context(widget);
if (!ctx) {
pango_font_description_free(desc);
return NULL;
}
if (!pangofont_check_desc_makes_sense(ctx, desc)) {
pango_font_description_free(desc);
return NULL;
}
return pangofont_create_internal(widget, ctx, desc, wide, bold,
shadowoffset, shadowalways);
}
static unifont *pangofont_create_fallback(GtkWidget *widget, int height,
int wide, int bold,
int shadowoffset, int shadowalways)
{
PangoContext *ctx;
PangoFontDescription *desc;
desc = pango_font_description_from_string("Monospace");
if (!desc)
return NULL;
ctx = gtk_widget_get_pango_context(widget);
if (!ctx) {
pango_font_description_free(desc);
return NULL;
}
pango_font_description_set_absolute_size(desc, height * PANGO_SCALE);
return pangofont_create_internal(widget, ctx, desc, wide, bold,
shadowoffset, shadowalways);
}
static void pangofont_destroy(unifont *font)
{
struct pangofont *pfont = (struct pangofont *)font;
pango_font_description_free(pfont->desc);
g_object_unref(pfont->fset);
sfree(font);
}
static int pangofont_has_glyph(unifont *font, wchar_t glyph)
{
/* Pango implements font fallback, so assume it has everything */
return TRUE;
}
static void pangofont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth)
{
struct pangofont *pfont = (struct pangofont *)font;
PangoLayout *layout;
PangoRectangle rect;
char *utfstring, *utfptr;
int utflen;
int shadowbold = FALSE;
if (wide)
cellwidth *= 2;
y -= pfont->u.ascent;
layout = pango_layout_new(gtk_widget_get_pango_context(pfont->widget));
pango_layout_set_font_description(layout, pfont->desc);
if (bold > pfont->bold) {
if (pfont->shadowalways)
shadowbold = TRUE;
else {
PangoFontDescription *desc2 =
pango_font_description_copy_static(pfont->desc);
pango_font_description_set_weight(desc2, PANGO_WEIGHT_BOLD);
pango_layout_set_font_description(layout, desc2);
}
}
/*
* Pango always expects UTF-8, so convert the input wide character
* string to UTF-8.
*/
utfstring = snewn(len*6+1, char); /* UTF-8 has max 6 bytes/char */
utflen = wc_to_mb(CS_UTF8, 0, string, len,
utfstring, len*6+1, ".", NULL, NULL);
utfptr = utfstring;
while (utflen > 0) {
int clen, n;
/*
* We want to display every character from this string in
* the centre of its own character cell. In the worst case,
* this requires a separate text-drawing call for each
* character; but in the common case where the font is
* properly fixed-width, we can draw many characters in one
* go which is much faster.
*
* This still isn't really ideal. If you look at what
* happens in the X protocol as a result of all of this, you
* find - naturally enough - that each call to
* gdk_draw_layout() generates a separate set of X RENDER
* operations involving creating a picture, setting a clip
* rectangle, doing some drawing and undoing the whole lot.
* In an ideal world, we should _always_ be able to turn the
* contents of this loop into a single RenderCompositeGlyphs
* operation which internally specifies inter-character
* deltas to get the spacing right, which would give us full
* speed _even_ in the worst case of a non-fixed-width font.
* However, Pango's architecture and documentation are so
* unhelpful that I have no idea how if at all to persuade
* them to do that.
*/
/*
* Start by extracting a single UTF-8 character from the
* string.
*/
clen = 1;
while (clen < utflen &&
(unsigned char)utfptr[clen] >= 0x80 &&
(unsigned char)utfptr[clen] < 0xC0)
clen++;
n = 1;
/*
* If it's a right-to-left character, we must display it on
* its own, to stop Pango helpfully re-reversing our already
* reversed text.
*/
if (!is_rtl(string[0])) {
/*
* See if that character has the width we expect.
*/
pango_layout_set_text(layout, utfptr, clen);
pango_layout_get_pixel_extents(layout, NULL, &rect);
if (rect.width == cellwidth) {
/*
* Try extracting more characters, for as long as they
* stay well-behaved.
*/
while (clen < utflen) {
int oldclen = clen;
clen++; /* skip UTF-8 introducer byte */
while (clen < utflen &&
(unsigned char)utfptr[clen] >= 0x80 &&
(unsigned char)utfptr[clen] < 0xC0)
clen++;
n++;
pango_layout_set_text(layout, utfptr, clen);
pango_layout_get_pixel_extents(layout, NULL, &rect);
if (rect.width != n * cellwidth) {
clen = oldclen;
n--;
break;
}
}
}
}
pango_layout_set_text(layout, utfptr, clen);
pango_layout_get_pixel_extents(layout, NULL, &rect);
gdk_draw_layout(target, gc, x + (n*cellwidth - rect.width)/2,
y + (pfont->u.height - rect.height)/2, layout);
if (shadowbold)
gdk_draw_layout(target, gc, x + (n*cellwidth - rect.width)/2 + pfont->shadowoffset,
y + (pfont->u.height - rect.height)/2, layout);
utflen -= clen;
utfptr += clen;
string += n;
x += n * cellwidth;
}
sfree(utfstring);
g_object_unref(layout);
}
/*
* Dummy size value to be used when converting a
* PangoFontDescription of a scalable font to a string for
* internal use.
*/
#define PANGO_DUMMY_SIZE 12
static void pangofont_enum_fonts(GtkWidget *widget, fontsel_add_entry callback,
void *callback_ctx)
{
PangoContext *ctx;
#ifndef PANGO_PRE_1POINT6
PangoFontMap *map;
#endif
PangoFontFamily **families;
int i, nfamilies;
ctx = gtk_widget_get_pango_context(widget);
if (!ctx)
return;
/*
* Ask Pango for a list of font families, and iterate through
* them.
*/
#ifndef PANGO_PRE_1POINT6
map = pango_context_get_font_map(ctx);
if (!map)
return;
pango_font_map_list_families(map, &families, &nfamilies);
#else
pango_context_list_families(ctx, &families, &nfamilies);
#endif
for (i = 0; i < nfamilies; i++) {
PangoFontFamily *family = families[i];
const char *familyname;
int flags;
PangoFontFace **faces;
int j, nfaces;
/*
* Set up our flags for this font family, and get the name
* string.
*/
flags = FONTFLAG_CLIENTSIDE;
#ifndef PANGO_PRE_1POINT4
/*
* In very early versions of Pango, we can't tell
* monospaced fonts from non-monospaced.
*/
if (!pango_font_family_is_monospace(family))
flags |= FONTFLAG_NONMONOSPACED;
#endif
familyname = pango_font_family_get_name(family);
/*
* Go through the available font faces in this family.
*/
pango_font_family_list_faces(family, &faces, &nfaces);
for (j = 0; j < nfaces; j++) {
PangoFontFace *face = faces[j];
PangoFontDescription *desc;
const char *facename;
int *sizes;
int k, nsizes, dummysize;
/*
* Get the face name string.
*/
facename = pango_font_face_get_face_name(face);
/*
* Set up a font description with what we've got so
* far. We'll fill in the size field manually and then
* call pango_font_description_to_string() to give the
* full real name of the specific font.
*/
desc = pango_font_face_describe(face);
/*
* See if this font has a list of specific sizes.
*/
#ifndef PANGO_PRE_1POINT4
pango_font_face_list_sizes(face, &sizes, &nsizes);
#else
/*
* In early versions of Pango, that call wasn't
* supported; we just have to assume everything is
* scalable.
*/
sizes = NULL;
#endif
if (!sizes) {
/*
* Write a single entry with a dummy size.
*/
dummysize = PANGO_DUMMY_SIZE * PANGO_SCALE;
sizes = &dummysize;
nsizes = 1;
}
/*
* If so, go through them one by one.
*/
for (k = 0; k < nsizes; k++) {
char *fullname;
char stylekey[128];
pango_font_description_set_size(desc, sizes[k]);
fullname = pango_font_description_to_string(desc);
/*
* Construct the sorting key for font styles.
*/
{
char *p = stylekey;
int n;
n = pango_font_description_get_weight(desc);
/* Weight: normal, then lighter, then bolder */
if (n <= PANGO_WEIGHT_NORMAL)
n = PANGO_WEIGHT_NORMAL - n;
p += sprintf(p, "%4d", n);
n = pango_font_description_get_style(desc);
p += sprintf(p, " %2d", n);
n = pango_font_description_get_stretch(desc);
/* Stretch: closer to normal sorts earlier */
n = 2 * abs(PANGO_STRETCH_NORMAL - n) +
(n < PANGO_STRETCH_NORMAL);
p += sprintf(p, " %2d", n);
n = pango_font_description_get_variant(desc);
p += sprintf(p, " %2d", n);
}
/*
* Got everything. Hand off to the callback.
* (The charset string is NULL, because only
* server-side X fonts use it.)
*/
callback(callback_ctx, fullname, familyname, NULL, facename,
stylekey,
(sizes == &dummysize ? 0 : PANGO_PIXELS(sizes[k])),
flags, &pangofont_vtable);
g_free(fullname);
}
if (sizes != &dummysize)
g_free(sizes);
pango_font_description_free(desc);
}
g_free(faces);
}
g_free(families);
}
static char *pangofont_canonify_fontname(GtkWidget *widget, const char *name,
int *size, int *flags,
int resolve_aliases)
{
/*
* When given a Pango font name to try to make sense of for a
* font selector, we must normalise it to PANGO_DUMMY_SIZE and
* extract its original size (in pixels) into the `size' field.
*/
PangoContext *ctx;
#ifndef PANGO_PRE_1POINT6
PangoFontMap *map;
#endif
PangoFontDescription *desc;
PangoFontset *fset;
PangoFontMetrics *metrics;
char *newname, *retname;
desc = pango_font_description_from_string(name);
if (!desc)
return NULL;
ctx = gtk_widget_get_pango_context(widget);
if (!ctx) {
pango_font_description_free(desc);
return NULL;
}
if (!pangofont_check_desc_makes_sense(ctx, desc)) {
pango_font_description_free(desc);
return NULL;
}
#ifndef PANGO_PRE_1POINT6
map = pango_context_get_font_map(ctx);
if (!map) {
pango_font_description_free(desc);
return NULL;
}
fset = pango_font_map_load_fontset(map, ctx, desc,
pango_context_get_language(ctx));
#else
fset = pango_context_load_fontset(ctx, desc,
pango_context_get_language(ctx));
#endif
if (!fset) {
pango_font_description_free(desc);
return NULL;
}
metrics = pango_fontset_get_metrics(fset);
if (!metrics ||
pango_font_metrics_get_approximate_digit_width(metrics) == 0) {
pango_font_description_free(desc);
g_object_unref(fset);
return NULL;
}
*size = PANGO_PIXELS(pango_font_description_get_size(desc));
*flags = FONTFLAG_CLIENTSIDE;
pango_font_description_set_size(desc, PANGO_DUMMY_SIZE * PANGO_SCALE);
newname = pango_font_description_to_string(desc);
retname = dupstr(newname);
g_free(newname);
pango_font_metrics_unref(metrics);
pango_font_description_free(desc);
g_object_unref(fset);
return retname;
}
static char *pangofont_scale_fontname(GtkWidget *widget, const char *name,
int size)
{
PangoFontDescription *desc;
char *newname, *retname;
desc = pango_font_description_from_string(name);
if (!desc)
return NULL;
pango_font_description_set_size(desc, size * PANGO_SCALE);
newname = pango_font_description_to_string(desc);
retname = dupstr(newname);
g_free(newname);
pango_font_description_free(desc);
return retname;
}
#endif /* GTK_CHECK_VERSION(2,0,0) */
/* ----------------------------------------------------------------------
* Outermost functions which do the vtable dispatch.
*/
/*
* Complete list of font-type subclasses. Listed in preference
* order for unifont_create(). (That is, in the extremely unlikely
* event that the same font name is valid as both a Pango and an
* X11 font, it will be interpreted as the former in the absence
* of an explicit type-disambiguating prefix.)
*
* The 'multifont' subclass is omitted here, as discussed above.
*/
static const struct unifont_vtable *unifont_types[] = {
#if GTK_CHECK_VERSION(2,0,0)
&pangofont_vtable,
#endif
&x11font_vtable,
};
/*
* Function which takes a font name and processes the optional
* scheme prefix. Returns the tail of the font name suitable for
* passing to individual font scheme functions, and also provides
* a subrange of the unifont_types[] array above.
*
* The return values `start' and `end' denote a half-open interval
* in unifont_types[]; that is, the correct way to iterate over
* them is
*
* for (i = start; i < end; i++) {...}
*/
static const char *unifont_do_prefix(const char *name, int *start, int *end)
{
int colonpos = strcspn(name, ":");
int i;
if (name[colonpos]) {
/*
* There's a colon prefix on the font name. Use it to work
* out which subclass to use.
*/
for (i = 0; i < lenof(unifont_types); i++) {
if (strlen(unifont_types[i]->prefix) == colonpos &&
!strncmp(unifont_types[i]->prefix, name, colonpos)) {
*start = i;
*end = i+1;
return name + colonpos + 1;
}
}
/*
* None matched, so return an empty scheme list to prevent
* any scheme from being called at all.
*/
*start = *end = 0;
return name + colonpos + 1;
} else {
/*
* No colon prefix, so just use all the subclasses.
*/
*start = 0;
*end = lenof(unifont_types);
return name;
}
}
unifont *unifont_create(GtkWidget *widget, const char *name, int wide,
int bold, int shadowoffset, int shadowalways)
{
int i, start, end;
name = unifont_do_prefix(name, &start, &end);
for (i = start; i < end; i++) {
unifont *ret = unifont_types[i]->create(widget, name, wide, bold,
shadowoffset, shadowalways);
if (ret)
return ret;
}
return NULL; /* font not found in any scheme */
}
void unifont_destroy(unifont *font)
{
font->vt->destroy(font);
}
void unifont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth)
{
font->vt->draw_text(target, gc, font, x, y, string, len,
wide, bold, cellwidth);
}
/* ----------------------------------------------------------------------
* Multiple-font wrapper. This is a type of unifont which encapsulates
* up to two other unifonts, permitting missing glyphs in the main
* font to be filled in by a fallback font.
*
* This is a type of unifont just like the previous two, but it has a
* separate constructor which is manually called by the client, so it
* doesn't appear in the list of available font types enumerated by
* unifont_create. This means it's not used by unifontsel either, so
* it doesn't need to support any methods except draw_text and
* destroy.
*/
static void multifont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth);
static void multifont_destroy(unifont *font);
struct multifont {
struct unifont u;
unifont *main;
unifont *fallback;
};
static const struct unifont_vtable multifont_vtable = {
NULL, /* creation is done specially */
NULL,
multifont_destroy,
NULL,
multifont_draw_text,
NULL,
NULL,
NULL,
"client",
};
unifont *multifont_create(GtkWidget *widget, const char *name,
int wide, int bold,
int shadowoffset, int shadowalways)
{
int i;
unifont *font, *fallback;
struct multifont *mfont;
font = unifont_create(widget, name, wide, bold,
shadowoffset, shadowalways);
if (!font)
return NULL;
fallback = NULL;
if (font->want_fallback) {
for (i = 0; i < lenof(unifont_types); i++) {
if (unifont_types[i]->create_fallback) {
fallback = unifont_types[i]->create_fallback
(widget, font->height, wide, bold,
shadowoffset, shadowalways);
if (fallback)
break;
}
}
}
/*
* Construct our multifont. Public members are all copied from the
* primary font we're wrapping.
*/
mfont = snew(struct multifont);
mfont->u.vt = &multifont_vtable;
mfont->u.width = font->width;
mfont->u.ascent = font->ascent;
mfont->u.descent = font->descent;
mfont->u.height = font->height;
mfont->u.public_charset = font->public_charset;
mfont->u.want_fallback = FALSE; /* shouldn't be needed, but just in case */
mfont->main = font;
mfont->fallback = fallback;
return (unifont *)mfont;
}
static void multifont_destroy(unifont *font)
{
struct multifont *mfont = (struct multifont *)font;
unifont_destroy(mfont->main);
if (mfont->fallback)
unifont_destroy(mfont->fallback);
sfree(font);
}
static void multifont_draw_text(GdkDrawable *target, GdkGC *gc, unifont *font,
int x, int y, const wchar_t *string, int len,
int wide, int bold, int cellwidth)
{
struct multifont *mfont = (struct multifont *)font;
int ok, i;
while (len > 0) {
/*
* Find a maximal sequence of characters which are, or are
* not, supported by our main font.
*/
ok = mfont->main->vt->has_glyph(mfont->main, string[0]);
for (i = 1;
i < len &&
!mfont->main->vt->has_glyph(mfont->main, string[i]) == !ok;
i++);
/*
* Now display it.
*/
unifont_draw_text(target, gc, ok ? mfont->main : mfont->fallback,
x, y, string, i, wide, bold, cellwidth);
string += i;
len -= i;
x += i * cellwidth;
}
}
#if GTK_CHECK_VERSION(2,0,0)
/* ----------------------------------------------------------------------
* Implementation of a unified font selector. Used on GTK 2 only;
* for GTK 1 we still use the standard font selector.
*/
typedef struct fontinfo fontinfo;
typedef struct unifontsel_internal {
/* This must be the structure's first element, for cross-casting */
unifontsel u;
GtkListStore *family_model, *style_model, *size_model;
GtkWidget *family_list, *style_list, *size_entry, *size_list;
GtkWidget *filter_buttons[4];
GtkWidget *preview_area;
GdkPixmap *preview_pixmap;
int preview_width, preview_height;
GdkColor preview_fg, preview_bg;
int filter_flags;
tree234 *fonts_by_realname, *fonts_by_selorder;
fontinfo *selected;
int selsize, intendedsize;
int inhibit_response; /* inhibit callbacks when we change GUI controls */
} unifontsel_internal;
/*
* The structure held in the tree234s. All the string members are
* part of the same allocated area, so don't need freeing
* separately.
*/
struct fontinfo {
char *realname;
char *family, *charset, *style, *stylekey;
int size, flags;
/*
* Fallback sorting key, to permit multiple identical entries
* to exist in the selorder tree.
*/
int index;
/*
* Indices mapping fontinfo structures to indices in the list
* boxes. sizeindex is irrelevant if the font is scalable
* (size==0).
*/
int familyindex, styleindex, sizeindex;
/*
* The class of font.
*/
const struct unifont_vtable *fontclass;
};
struct fontinfo_realname_find {
const char *realname;
int flags;
};
static int strnullcasecmp(const char *a, const char *b)
{
int i;
/*
* If exactly one of the inputs is NULL, it compares before
* the other one.
*/
if ((i = (!b) - (!a)) != 0)
return i;
/*
* NULL compares equal.
*/
if (!a)
return 0;
/*
* Otherwise, ordinary strcasecmp.
*/
return g_ascii_strcasecmp(a, b);
}
static int fontinfo_realname_compare(void *av, void *bv)
{
fontinfo *a = (fontinfo *)av;
fontinfo *b = (fontinfo *)bv;
int i;
if ((i = strnullcasecmp(a->realname, b->realname)) != 0)
return i;
if ((a->flags & FONTFLAG_SORT_MASK) != (b->flags & FONTFLAG_SORT_MASK))
return ((a->flags & FONTFLAG_SORT_MASK) <
(b->flags & FONTFLAG_SORT_MASK) ? -1 : +1);
return 0;
}
static int fontinfo_realname_find(void *av, void *bv)
{
struct fontinfo_realname_find *a = (struct fontinfo_realname_find *)av;
fontinfo *b = (fontinfo *)bv;
int i;
if ((i = strnullcasecmp(a->realname, b->realname)) != 0)
return i;
if ((a->flags & FONTFLAG_SORT_MASK) != (b->flags & FONTFLAG_SORT_MASK))
return ((a->flags & FONTFLAG_SORT_MASK) <
(b->flags & FONTFLAG_SORT_MASK) ? -1 : +1);
return 0;
}
static int fontinfo_selorder_compare(void *av, void *bv)
{
fontinfo *a = (fontinfo *)av;
fontinfo *b = (fontinfo *)bv;
int i;
if ((i = strnullcasecmp(a->family, b->family)) != 0)
return i;
/*
* Font class comes immediately after family, so that fonts
* from different classes with the same family
*/
if ((a->flags & FONTFLAG_SORT_MASK) != (b->flags & FONTFLAG_SORT_MASK))
return ((a->flags & FONTFLAG_SORT_MASK) <
(b->flags & FONTFLAG_SORT_MASK) ? -1 : +1);
if ((i = strnullcasecmp(a->charset, b->charset)) != 0)
return i;
if ((i = strnullcasecmp(a->stylekey, b->stylekey)) != 0)
return i;
if ((i = strnullcasecmp(a->style, b->style)) != 0)
return i;
if (a->size != b->size)
return (a->size < b->size ? -1 : +1);
if (a->index != b->index)
return (a->index < b->index ? -1 : +1);
return 0;
}
static void unifontsel_deselect(unifontsel_internal *fs)
{
fs->selected = NULL;
gtk_list_store_clear(fs->style_model);
gtk_list_store_clear(fs->size_model);
gtk_widget_set_sensitive(fs->u.ok_button, FALSE);
gtk_widget_set_sensitive(fs->size_entry, FALSE);
}
static void unifontsel_setup_familylist(unifontsel_internal *fs)
{
GtkTreeIter iter;
int i, listindex, minpos = -1, maxpos = -1;
char *currfamily = NULL;
int currflags = -1;
fontinfo *info;
gtk_list_store_clear(fs->family_model);
listindex = 0;
/*
* Search through the font tree for anything matching our
* current filter criteria. When we find one, add its font
* name to the list box.
*/
for (i = 0 ;; i++) {
info = (fontinfo *)index234(fs->fonts_by_selorder, i);
/*
* info may be NULL if we've just run off the end of the
* tree. We must still do a processing pass in that
* situation, in case we had an unfinished font record in
* progress.
*/
if (info && (info->flags &~ fs->filter_flags)) {
info->familyindex = -1;
continue; /* we're filtering out this font */
}
if (!info || strnullcasecmp(currfamily, info->family) ||
currflags != (info->flags & FONTFLAG_SORT_MASK)) {
/*
* We've either finished a family, or started a new
* one, or both.
*/
if (currfamily) {
gtk_list_store_append(fs->family_model, &iter);
gtk_list_store_set(fs->family_model, &iter,
0, currfamily, 1, minpos, 2, maxpos+1, -1);
listindex++;
}
if (info) {
minpos = i;
currfamily = info->family;
currflags = info->flags & FONTFLAG_SORT_MASK;
}
}
if (!info)
break; /* now we're done */
info->familyindex = listindex;
maxpos = i;
}
/*
* If we've just filtered out the previously selected font,
* deselect it thoroughly.
*/
if (fs->selected && fs->selected->familyindex < 0)
unifontsel_deselect(fs);
}
static void unifontsel_setup_stylelist(unifontsel_internal *fs,
int start, int end)
{
GtkTreeIter iter;
int i, listindex, minpos = -1, maxpos = -1, started = FALSE;
char *currcs = NULL, *currstyle = NULL;
fontinfo *info;
gtk_list_store_clear(fs->style_model);
listindex = 0;
started = FALSE;
/*
* Search through the font tree for anything matching our
* current filter criteria. When we find one, add its charset
* and/or style name to the list box.
*/
for (i = start; i <= end; i++) {
if (i == end)
info = NULL;
else
info = (fontinfo *)index234(fs->fonts_by_selorder, i);
/*
* info may be NULL if we've just run off the end of the
* relevant data. We must still do a processing pass in
* that situation, in case we had an unfinished font
* record in progress.
*/
if (info && (info->flags &~ fs->filter_flags)) {
info->styleindex = -1;
continue; /* we're filtering out this font */
}
if (!info || !started || strnullcasecmp(currcs, info->charset) ||
strnullcasecmp(currstyle, info->style)) {
/*
* We've either finished a style/charset, or started a
* new one, or both.
*/
started = TRUE;
if (currstyle) {
gtk_list_store_append(fs->style_model, &iter);
gtk_list_store_set(fs->style_model, &iter,
0, currstyle, 1, minpos, 2, maxpos+1,
3, TRUE, -1);
listindex++;
}
if (info) {
minpos = i;
if (info->charset && strnullcasecmp(currcs, info->charset)) {
gtk_list_store_append(fs->style_model, &iter);
gtk_list_store_set(fs->style_model, &iter,
0, info->charset, 1, -1, 2, -1,
3, FALSE, -1);
listindex++;
}
currcs = info->charset;
currstyle = info->style;
}
}
if (!info)
break; /* now we're done */
info->styleindex = listindex;
maxpos = i;
}
}
static const int unifontsel_default_sizes[] = { 10, 12, 14, 16, 20, 24, 32 };
static void unifontsel_setup_sizelist(unifontsel_internal *fs,
int start, int end)
{
GtkTreeIter iter;
int i, listindex;
char sizetext[40];
fontinfo *info;
gtk_list_store_clear(fs->size_model);
listindex = 0;
/*
* Search through the font tree for anything matching our
* current filter criteria. When we find one, add its font
* name to the list box.
*/
for (i = start; i < end; i++) {
info = (fontinfo *)index234(fs->fonts_by_selorder, i);
if (info->flags &~ fs->filter_flags) {
info->sizeindex = -1;
continue; /* we're filtering out this font */
}
if (info->size) {
sprintf(sizetext, "%d", info->size);
info->sizeindex = listindex;
gtk_list_store_append(fs->size_model, &iter);
gtk_list_store_set(fs->size_model, &iter,
0, sizetext, 1, i, 2, info->size, -1);
listindex++;
} else {
int j;
assert(i == start);
assert(i+1 == end);
for (j = 0; j < lenof(unifontsel_default_sizes); j++) {
sprintf(sizetext, "%d", unifontsel_default_sizes[j]);
gtk_list_store_append(fs->size_model, &iter);
gtk_list_store_set(fs->size_model, &iter, 0, sizetext, 1, i,
2, unifontsel_default_sizes[j], -1);
listindex++;
}
}
}
}
static void unifontsel_set_filter_buttons(unifontsel_internal *fs)
{
int i;
for (i = 0; i < lenof(fs->filter_buttons); i++) {
int flagbit = GPOINTER_TO_INT(gtk_object_get_data
(GTK_OBJECT(fs->filter_buttons[i]),
"user-data"));
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(fs->filter_buttons[i]),
!!(fs->filter_flags & flagbit));
}
}
static void unifontsel_draw_preview_text(unifontsel_internal *fs)
{
unifont *font;
char *sizename = NULL;
fontinfo *info = fs->selected;
if (info) {
sizename = info->fontclass->scale_fontname
(GTK_WIDGET(fs->u.window), info->realname, fs->selsize);
font = info->fontclass->create(GTK_WIDGET(fs->u.window),
sizename ? sizename : info->realname,
FALSE, FALSE, 0, 0);
} else
font = NULL;
if (fs->preview_pixmap) {
GdkGC *gc = gdk_gc_new(fs->preview_pixmap);
gdk_gc_set_foreground(gc, &fs->preview_bg);
gdk_draw_rectangle(fs->preview_pixmap, gc, 1, 0, 0,
fs->preview_width, fs->preview_height);
gdk_gc_set_foreground(gc, &fs->preview_fg);
if (font) {
/*
* The pangram used here is rather carefully
* constructed: it contains a sequence of very narrow
* letters (`jil') and a pair of adjacent very wide
* letters (`wm').
*
* If the user selects a proportional font, it will be
* coerced into fixed-width character cells when used
* in the actual terminal window. We therefore display
* it the same way in the preview pane, so as to show
* it the way it will actually be displayed - and we
* deliberately pick a pangram which will show the
* resulting miskerning at its worst.
*
* We aren't trying to sell people these fonts; we're
* trying to let them make an informed choice. Better
* that they find out the problems with using
* proportional fonts in terminal windows here than
* that they go to the effort of selecting their font
* and _then_ realise it was a mistake.
*/
info->fontclass->draw_text(fs->preview_pixmap, gc, font,
0, font->ascent,
L"bankrupt jilted showmen quiz convex fogey",
41, FALSE, FALSE, font->width);
info->fontclass->draw_text(fs->preview_pixmap, gc, font,
0, font->ascent + font->height,
L"BANKRUPT JILTED SHOWMEN QUIZ CONVEX FOGEY",
41, FALSE, FALSE, font->width);
/*
* The ordering of punctuation here is also selected
* with some specific aims in mind. I put ` and '
* together because some software (and people) still
* use them as matched quotes no matter what Unicode
* might say on the matter, so people can quickly
* check whether they look silly in a candidate font.
* The sequence #_@ is there to let people judge the
* suitability of the underscore as an effectively
* alphabetic character (since that's how it's often
* used in practice, at least by programmers).
*/
info->fontclass->draw_text(fs->preview_pixmap, gc, font,
0, font->ascent + font->height * 2,
L"0123456789!?,.:;<>()[]{}\\/`'\"+*-=~#_@|%&^$",
42, FALSE, FALSE, font->width);
}
gdk_gc_unref(gc);
gdk_window_invalidate_rect(fs->preview_area->window, NULL, FALSE);
}
if (font)
info->fontclass->destroy(font);
sfree(sizename);
}
static void unifontsel_select_font(unifontsel_internal *fs,
fontinfo *info, int size, int leftlist,
int size_is_explicit)
{
int index;
int minval, maxval;
GtkTreePath *treepath;
GtkTreeIter iter;
fs->inhibit_response = TRUE;
fs->selected = info;
fs->selsize = size;
if (size_is_explicit)
fs->intendedsize = size;
gtk_widget_set_sensitive(fs->u.ok_button, TRUE);
/*
* Find the index of this fontinfo in the selorder list.
*/
index = -1;
findpos234(fs->fonts_by_selorder, info, NULL, &index);
assert(index >= 0);
/*
* Adjust the font selector flags and redo the font family
* list box, if necessary.
*/
if (leftlist <= 0 &&
(fs->filter_flags | info->flags) != fs->filter_flags) {
fs->filter_flags |= info->flags;
unifontsel_set_filter_buttons(fs);
unifontsel_setup_familylist(fs);
}
/*
* Find the appropriate family name and select it in the list.
*/
assert(info->familyindex >= 0);
treepath = gtk_tree_path_new_from_indices(info->familyindex, -1);
gtk_tree_selection_select_path
(gtk_tree_view_get_selection(GTK_TREE_VIEW(fs->family_list)),
treepath);
gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->family_list),
treepath, NULL, FALSE, 0.0, 0.0);
gtk_tree_model_get_iter(GTK_TREE_MODEL(fs->family_model), &iter, treepath);
gtk_tree_path_free(treepath);
/*
* Now set up the font style list.
*/
gtk_tree_model_get(GTK_TREE_MODEL(fs->family_model), &iter,
1, &minval, 2, &maxval, -1);
if (leftlist <= 1)
unifontsel_setup_stylelist(fs, minval, maxval);
/*
* Find the appropriate style name and select it in the list.
*/
if (info->style) {
assert(info->styleindex >= 0);
treepath = gtk_tree_path_new_from_indices(info->styleindex, -1);
gtk_tree_selection_select_path
(gtk_tree_view_get_selection(GTK_TREE_VIEW(fs->style_list)),
treepath);
gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->style_list),
treepath, NULL, FALSE, 0.0, 0.0);
gtk_tree_model_get_iter(GTK_TREE_MODEL(fs->style_model),
&iter, treepath);
gtk_tree_path_free(treepath);
/*
* And set up the size list.
*/
gtk_tree_model_get(GTK_TREE_MODEL(fs->style_model), &iter,
1, &minval, 2, &maxval, -1);
if (leftlist <= 2)
unifontsel_setup_sizelist(fs, minval, maxval);
/*
* Find the appropriate size, and select it in the list.
*/
if (info->size) {
assert(info->sizeindex >= 0);
treepath = gtk_tree_path_new_from_indices(info->sizeindex, -1);
gtk_tree_selection_select_path
(gtk_tree_view_get_selection(GTK_TREE_VIEW(fs->size_list)),
treepath);
gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->size_list),
treepath, NULL, FALSE, 0.0, 0.0);
gtk_tree_path_free(treepath);
size = info->size;
} else {
int j;
for (j = 0; j < lenof(unifontsel_default_sizes); j++)
if (unifontsel_default_sizes[j] == size) {
treepath = gtk_tree_path_new_from_indices(j, -1);
gtk_tree_view_set_cursor(GTK_TREE_VIEW(fs->size_list),
treepath, NULL, FALSE);
gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(fs->size_list),
treepath, NULL, FALSE, 0.0,
0.0);
gtk_tree_path_free(treepath);
}
}
/*
* And set up the font size text entry box.
*/
{
char sizetext[40];
sprintf(sizetext, "%d", size);
gtk_entry_set_text(GTK_ENTRY(fs->size_entry), sizetext);
}
} else {
if (leftlist <= 2)
unifontsel_setup_sizelist(fs, 0, 0);
gtk_entry_set_text(GTK_ENTRY(fs->size_entry), "");
}
/*
* Grey out the font size edit box if we're not using a
* scalable font.
*/
gtk_entry_set_editable(GTK_ENTRY(fs->size_entry), fs->selected->size == 0);
gtk_widget_set_sensitive(fs->size_entry, fs->selected->size == 0);
unifontsel_draw_preview_text(fs);
fs->inhibit_response = FALSE;
}
static void unifontsel_button_toggled(GtkToggleButton *tb, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
int newstate = gtk_toggle_button_get_active(tb);
int newflags;
int flagbit = GPOINTER_TO_INT(gtk_object_get_data(GTK_OBJECT(tb),
"user-data"));
if (newstate)
newflags = fs->filter_flags | flagbit;
else
newflags = fs->filter_flags & ~flagbit;
if (fs->filter_flags != newflags) {
fs->filter_flags = newflags;
unifontsel_setup_familylist(fs);
}
}
static void unifontsel_add_entry(void *ctx, const char *realfontname,
const char *family, const char *charset,
const char *style, const char *stylekey,
int size, int flags,
const struct unifont_vtable *fontclass)
{
unifontsel_internal *fs = (unifontsel_internal *)ctx;
fontinfo *info;
int totalsize;
char *p;
totalsize = sizeof(fontinfo) + strlen(realfontname) +
(family ? strlen(family) : 0) + (charset ? strlen(charset) : 0) +
(style ? strlen(style) : 0) + (stylekey ? strlen(stylekey) : 0) + 10;
info = (fontinfo *)smalloc(totalsize);
info->fontclass = fontclass;
p = (char *)info + sizeof(fontinfo);
info->realname = p;
strcpy(p, realfontname);
p += 1+strlen(p);
if (family) {
info->family = p;
strcpy(p, family);
p += 1+strlen(p);
} else
info->family = NULL;
if (charset) {
info->charset = p;
strcpy(p, charset);
p += 1+strlen(p);
} else
info->charset = NULL;
if (style) {
info->style = p;
strcpy(p, style);
p += 1+strlen(p);
} else
info->style = NULL;
if (stylekey) {
info->stylekey = p;
strcpy(p, stylekey);
p += 1+strlen(p);
} else
info->stylekey = NULL;
assert(p - (char *)info <= totalsize);
info->size = size;
info->flags = flags;
info->index = count234(fs->fonts_by_selorder);
/*
* It's just conceivable that a misbehaving font enumerator
* might tell us about the same font real name more than once,
* in which case we should silently drop the new one.
*/
if (add234(fs->fonts_by_realname, info) != info) {
sfree(info);
return;
}
/*
* However, we should never get a duplicate key in the
* selorder tree, because the index field carefully
* disambiguates otherwise identical records.
*/
add234(fs->fonts_by_selorder, info);
}
static fontinfo *update_for_intended_size(unifontsel_internal *fs,
fontinfo *info)
{
fontinfo info2, *below, *above;
int pos;
/*
* Copy the info structure. This doesn't copy its dynamic
* string fields, but that's unimportant because all we're
* going to do is to adjust the size field and use it in one
* tree search.
*/
info2 = *info;
info2.size = fs->intendedsize;
/*
* Search in the tree to find the fontinfo structure which
* best approximates the size the user last requested.
*/
below = findrelpos234(fs->fonts_by_selorder, &info2, NULL,
REL234_LE, &pos);
if (!below)
pos = -1;
above = index234(fs->fonts_by_selorder, pos+1);
/*
* See if we've found it exactly, which is an easy special
* case. If we have, it'll be in `below' and not `above',
* because we did a REL234_LE rather than REL234_LT search.
*/
if (below && !fontinfo_selorder_compare(&info2, below))
return below;
/*
* Now we've either found two suitable fonts, one smaller and
* one larger, or we're at one or other extreme end of the
* scale. Find out which, by NULLing out either of below and
* above if it differs from this one in any respect but size
* (and the disambiguating index field). Bear in mind, also,
* that either one might _already_ be NULL if we're at the
* extreme ends of the font list.
*/
if (below) {
info2.size = below->size;
info2.index = below->index;
if (fontinfo_selorder_compare(&info2, below))
below = NULL;
}
if (above) {
info2.size = above->size;
info2.index = above->index;
if (fontinfo_selorder_compare(&info2, above))
above = NULL;
}
/*
* Now return whichever of above and below is non-NULL, if
* that's unambiguous.
*/
if (!above)
return below;
if (!below)
return above;
/*
* And now we really do have to make a choice about whether to
* round up or down. We'll do it by rounding to nearest,
* breaking ties by rounding up.
*/
if (above->size - fs->intendedsize <= fs->intendedsize - below->size)
return above;
else
return below;
}
static void family_changed(GtkTreeSelection *treeselection, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
GtkTreeModel *treemodel;
GtkTreeIter treeiter;
int minval;
fontinfo *info;
if (fs->inhibit_response) /* we made this change ourselves */
return;
if (!gtk_tree_selection_get_selected(treeselection, &treemodel, &treeiter))
return;
gtk_tree_model_get(treemodel, &treeiter, 1, &minval, -1);
info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
info = update_for_intended_size(fs, info);
if (!info)
return; /* _shouldn't_ happen unless font list is completely funted */
if (!info->size)
fs->selsize = fs->intendedsize; /* font is scalable */
unifontsel_select_font(fs, info, info->size ? info->size : fs->selsize,
1, FALSE);
}
static void style_changed(GtkTreeSelection *treeselection, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
GtkTreeModel *treemodel;
GtkTreeIter treeiter;
int minval;
fontinfo *info;
if (fs->inhibit_response) /* we made this change ourselves */
return;
if (!gtk_tree_selection_get_selected(treeselection, &treemodel, &treeiter))
return;
gtk_tree_model_get(treemodel, &treeiter, 1, &minval, -1);
if (minval < 0)
return; /* somehow a charset heading got clicked */
info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
info = update_for_intended_size(fs, info);
if (!info)
return; /* _shouldn't_ happen unless font list is completely funted */
if (!info->size)
fs->selsize = fs->intendedsize; /* font is scalable */
unifontsel_select_font(fs, info, info->size ? info->size : fs->selsize,
2, FALSE);
}
static void size_changed(GtkTreeSelection *treeselection, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
GtkTreeModel *treemodel;
GtkTreeIter treeiter;
int minval, size;
fontinfo *info;
if (fs->inhibit_response) /* we made this change ourselves */
return;
if (!gtk_tree_selection_get_selected(treeselection, &treemodel, &treeiter))
return;
gtk_tree_model_get(treemodel, &treeiter, 1, &minval, 2, &size, -1);
info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
unifontsel_select_font(fs, info, info->size ? info->size : size, 3, TRUE);
}
static void size_entry_changed(GtkEditable *ed, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
const char *text;
int size;
if (fs->inhibit_response) /* we made this change ourselves */
return;
text = gtk_entry_get_text(GTK_ENTRY(ed));
size = atoi(text);
if (size > 0) {
assert(fs->selected->size == 0);
unifontsel_select_font(fs, fs->selected, size, 3, TRUE);
}
}
static void alias_resolve(GtkTreeView *treeview, GtkTreePath *path,
GtkTreeViewColumn *column, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
GtkTreeIter iter;
int minval, newsize;
fontinfo *info, *newinfo;
char *newname;
if (fs->inhibit_response) /* we made this change ourselves */
return;
gtk_tree_model_get_iter(GTK_TREE_MODEL(fs->family_model), &iter, path);
gtk_tree_model_get(GTK_TREE_MODEL(fs->family_model), &iter, 1,&minval, -1);
info = (fontinfo *)index234(fs->fonts_by_selorder, minval);
if (info) {
int flags;
struct fontinfo_realname_find f;
newname = info->fontclass->canonify_fontname
(GTK_WIDGET(fs->u.window), info->realname, &newsize, &flags, TRUE);
f.realname = newname;
f.flags = flags;
newinfo = find234(fs->fonts_by_realname, &f, fontinfo_realname_find);
sfree(newname);
if (!newinfo)
return; /* font name not in our index */
if (newinfo == info)
return; /* didn't change under canonification => not an alias */
unifontsel_select_font(fs, newinfo,
newinfo->size ? newinfo->size : newsize,
1, TRUE);
}
}
static gint unifontsel_expose_area(GtkWidget *widget, GdkEventExpose *event,
gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
if (fs->preview_pixmap) {
gdk_draw_pixmap(widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE(widget)],
fs->preview_pixmap,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
}
return TRUE;
}
static gint unifontsel_configure_area(GtkWidget *widget,
GdkEventConfigure *event, gpointer data)
{
unifontsel_internal *fs = (unifontsel_internal *)data;
int ox, oy, nx, ny, x, y;
/*
* Enlarge the pixmap, but never shrink it.
*/
ox = fs->preview_width;
oy = fs->preview_height;
x = event->width;
y = event->height;
if (x > ox || y > oy) {
if (fs->preview_pixmap)
gdk_pixmap_unref(fs->preview_pixmap);
nx = (x > ox ? x : ox);
ny = (y > oy ? y : oy);
fs->preview_pixmap = gdk_pixmap_new(widget->window, nx, ny, -1);
fs->preview_width = nx;
fs->preview_height = ny;
unifontsel_draw_preview_text(fs);
}
gdk_window_invalidate_rect(widget->window, NULL, FALSE);
return TRUE;
}
unifontsel *unifontsel_new(const char *wintitle)
{
unifontsel_internal *fs = snew(unifontsel_internal);
GtkWidget *table, *label, *w, *ww, *scroll;
GtkListStore *model;
GtkTreeViewColumn *column;
int lists_height, preview_height, font_width, style_width, size_width;
int i;
fs->inhibit_response = FALSE;
fs->selected = NULL;
{
/*
* Invent some magic size constants.
*/
GtkRequisition req;
label = gtk_label_new("Quite Long Font Name (Foundry)");
gtk_widget_size_request(label, &req);
font_width = req.width;
lists_height = 14 * req.height;
preview_height = 5 * req.height;
gtk_label_set_text(GTK_LABEL(label), "Italic Extra Condensed");
gtk_widget_size_request(label, &req);
style_width = req.width;
gtk_label_set_text(GTK_LABEL(label), "48000");
gtk_widget_size_request(label, &req);
size_width = req.width;
#if GTK_CHECK_VERSION(2,10,0)
g_object_ref_sink(label);
g_object_unref(label);
#else
gtk_object_sink(GTK_OBJECT(label));
#endif
}
/*
* Create the dialog box and initialise the user-visible
* fields in the returned structure.
*/
fs->u.user_data = NULL;
fs->u.window = GTK_WINDOW(gtk_dialog_new());
gtk_window_set_title(fs->u.window, wintitle);
fs->u.cancel_button = gtk_dialog_add_button
(GTK_DIALOG(fs->u.window), GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL);
fs->u.ok_button = gtk_dialog_add_button
(GTK_DIALOG(fs->u.window), GTK_STOCK_OK, GTK_RESPONSE_OK);
gtk_widget_grab_default(fs->u.ok_button);
/*
* Now set up the internal fields, including in particular all
* the controls that actually allow the user to select fonts.
*/
table = gtk_table_new(8, 3, FALSE);
gtk_widget_show(table);
gtk_table_set_col_spacings(GTK_TABLE(table), 8);
#if GTK_CHECK_VERSION(2,4,0)
/* GtkAlignment seems to be the simplest way to put padding round things */
w = gtk_alignment_new(0, 0, 1, 1);
gtk_alignment_set_padding(GTK_ALIGNMENT(w), 8, 8, 8, 8);
gtk_container_add(GTK_CONTAINER(w), table);
gtk_widget_show(w);
#else
w = table;
#endif
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(fs->u.window)->vbox),
w, TRUE, TRUE, 0);
label = gtk_label_new_with_mnemonic("_Font:");
gtk_widget_show(label);
gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
gtk_table_attach(GTK_TABLE(table), label, 0, 1, 0, 1, GTK_FILL, 0, 0, 0);
/*
* The Font list box displays only a string, but additionally
* stores two integers which give the limits within the
* tree234 of the font entries covered by this list entry.
*/
model = gtk_list_store_new(3, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT);
w = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(w), FALSE);
gtk_label_set_mnemonic_widget(GTK_LABEL(label), w);
gtk_widget_show(w);
column = gtk_tree_view_column_new_with_attributes
("Font", gtk_cell_renderer_text_new(),
"text", 0, (char *)NULL);
gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
gtk_tree_view_append_column(GTK_TREE_VIEW(w), column);
g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(w))),
"changed", G_CALLBACK(family_changed), fs);
g_signal_connect(G_OBJECT(w), "row-activated",
G_CALLBACK(alias_resolve), fs);
scroll = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
GTK_SHADOW_IN);
gtk_container_add(GTK_CONTAINER(scroll), w);
gtk_widget_show(scroll);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
gtk_widget_set_size_request(scroll, font_width, lists_height);
gtk_table_attach(GTK_TABLE(table), scroll, 0, 1, 1, 3, GTK_FILL,
GTK_EXPAND | GTK_FILL, 0, 0);
fs->family_model = model;
fs->family_list = w;
label = gtk_label_new_with_mnemonic("_Style:");
gtk_widget_show(label);
gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
gtk_table_attach(GTK_TABLE(table), label, 1, 2, 0, 1, GTK_FILL, 0, 0, 0);
/*
* The Style list box can contain insensitive elements
* (character set headings for server-side fonts), so we add
* an extra column to the list store to hold that information.
*/
model = gtk_list_store_new(4, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT,
G_TYPE_BOOLEAN);
w = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(w), FALSE);
gtk_label_set_mnemonic_widget(GTK_LABEL(label), w);
gtk_widget_show(w);
column = gtk_tree_view_column_new_with_attributes
("Style", gtk_cell_renderer_text_new(),
"text", 0, "sensitive", 3, (char *)NULL);
gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
gtk_tree_view_append_column(GTK_TREE_VIEW(w), column);
g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(w))),
"changed", G_CALLBACK(style_changed), fs);
scroll = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
GTK_SHADOW_IN);
gtk_container_add(GTK_CONTAINER(scroll), w);
gtk_widget_show(scroll);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
gtk_widget_set_size_request(scroll, style_width, lists_height);
gtk_table_attach(GTK_TABLE(table), scroll, 1, 2, 1, 3, GTK_FILL,
GTK_EXPAND | GTK_FILL, 0, 0);
fs->style_model = model;
fs->style_list = w;
label = gtk_label_new_with_mnemonic("Si_ze:");
gtk_widget_show(label);
gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
gtk_table_attach(GTK_TABLE(table), label, 2, 3, 0, 1, GTK_FILL, 0, 0, 0);
/*
* The Size label attaches primarily to a text input box so
* that the user can select a size of their choice. The list
* of available sizes is secondary.
*/
fs->size_entry = w = gtk_entry_new();
gtk_label_set_mnemonic_widget(GTK_LABEL(label), w);
gtk_widget_set_size_request(w, size_width, -1);
gtk_widget_show(w);
gtk_table_attach(GTK_TABLE(table), w, 2, 3, 1, 2, GTK_FILL, 0, 0, 0);
g_signal_connect(G_OBJECT(w), "changed", G_CALLBACK(size_entry_changed),
fs);
model = gtk_list_store_new(3, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT);
w = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(w), FALSE);
gtk_widget_show(w);
column = gtk_tree_view_column_new_with_attributes
("Size", gtk_cell_renderer_text_new(),
"text", 0, (char *)NULL);
gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
gtk_tree_view_append_column(GTK_TREE_VIEW(w), column);
g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(w))),
"changed", G_CALLBACK(size_changed), fs);
scroll = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
GTK_SHADOW_IN);
gtk_container_add(GTK_CONTAINER(scroll), w);
gtk_widget_show(scroll);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
gtk_table_attach(GTK_TABLE(table), scroll, 2, 3, 2, 3, GTK_FILL,
GTK_EXPAND | GTK_FILL, 0, 0);
fs->size_model = model;
fs->size_list = w;
/*
* Preview widget.
*/
fs->preview_area = gtk_drawing_area_new();
fs->preview_pixmap = NULL;
fs->preview_width = 0;
fs->preview_height = 0;
fs->preview_fg.pixel = fs->preview_bg.pixel = 0;
fs->preview_fg.red = fs->preview_fg.green = fs->preview_fg.blue = 0x0000;
fs->preview_bg.red = fs->preview_bg.green = fs->preview_bg.blue = 0xFFFF;
gdk_colormap_alloc_color(gdk_colormap_get_system(), &fs->preview_fg,
FALSE, FALSE);
gdk_colormap_alloc_color(gdk_colormap_get_system(), &fs->preview_bg,
FALSE, FALSE);
gtk_signal_connect(GTK_OBJECT(fs->preview_area), "expose_event",
GTK_SIGNAL_FUNC(unifontsel_expose_area), fs);
gtk_signal_connect(GTK_OBJECT(fs->preview_area), "configure_event",
GTK_SIGNAL_FUNC(unifontsel_configure_area), fs);
gtk_widget_set_size_request(fs->preview_area, 1, preview_height);
gtk_widget_show(fs->preview_area);
ww = fs->preview_area;
w = gtk_frame_new(NULL);
gtk_container_add(GTK_CONTAINER(w), ww);
gtk_widget_show(w);
#if GTK_CHECK_VERSION(2,4,0)
ww = w;
/* GtkAlignment seems to be the simplest way to put padding round things */
w = gtk_alignment_new(0, 0, 1, 1);
gtk_alignment_set_padding(GTK_ALIGNMENT(w), 8, 8, 8, 8);
gtk_container_add(GTK_CONTAINER(w), ww);
gtk_widget_show(w);
#endif
ww = w;
w = gtk_frame_new("Preview of font");
gtk_container_add(GTK_CONTAINER(w), ww);
gtk_widget_show(w);
gtk_table_attach(GTK_TABLE(table), w, 0, 3, 3, 4,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 8);
i = 0;
w = gtk_check_button_new_with_label("Show client-side fonts");
gtk_object_set_data(GTK_OBJECT(w), "user-data",
GINT_TO_POINTER(FONTFLAG_CLIENTSIDE));
gtk_signal_connect(GTK_OBJECT(w), "toggled",
GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
gtk_widget_show(w);
fs->filter_buttons[i++] = w;
gtk_table_attach(GTK_TABLE(table), w, 0, 3, 4, 5, GTK_FILL, 0, 0, 0);
w = gtk_check_button_new_with_label("Show server-side fonts");
gtk_object_set_data(GTK_OBJECT(w), "user-data",
GINT_TO_POINTER(FONTFLAG_SERVERSIDE));
gtk_signal_connect(GTK_OBJECT(w), "toggled",
GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
gtk_widget_show(w);
fs->filter_buttons[i++] = w;
gtk_table_attach(GTK_TABLE(table), w, 0, 3, 5, 6, GTK_FILL, 0, 0, 0);
w = gtk_check_button_new_with_label("Show server-side font aliases");
gtk_object_set_data(GTK_OBJECT(w), "user-data",
GINT_TO_POINTER(FONTFLAG_SERVERALIAS));
gtk_signal_connect(GTK_OBJECT(w), "toggled",
GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
gtk_widget_show(w);
fs->filter_buttons[i++] = w;
gtk_table_attach(GTK_TABLE(table), w, 0, 3, 6, 7, GTK_FILL, 0, 0, 0);
w = gtk_check_button_new_with_label("Show non-monospaced fonts");
gtk_object_set_data(GTK_OBJECT(w), "user-data",
GINT_TO_POINTER(FONTFLAG_NONMONOSPACED));
gtk_signal_connect(GTK_OBJECT(w), "toggled",
GTK_SIGNAL_FUNC(unifontsel_button_toggled), fs);
gtk_widget_show(w);
fs->filter_buttons[i++] = w;
gtk_table_attach(GTK_TABLE(table), w, 0, 3, 7, 8, GTK_FILL, 0, 0, 0);
assert(i == lenof(fs->filter_buttons));
fs->filter_flags = FONTFLAG_CLIENTSIDE | FONTFLAG_SERVERSIDE |
FONTFLAG_SERVERALIAS;
unifontsel_set_filter_buttons(fs);
/*
* Go and find all the font names, and set up our master font
* list.
*/
fs->fonts_by_realname = newtree234(fontinfo_realname_compare);
fs->fonts_by_selorder = newtree234(fontinfo_selorder_compare);
for (i = 0; i < lenof(unifont_types); i++)
unifont_types[i]->enum_fonts(GTK_WIDGET(fs->u.window),
unifontsel_add_entry, fs);
/*
* And set up the initial font names list.
*/
unifontsel_setup_familylist(fs);
fs->selsize = fs->intendedsize = 13; /* random default */
gtk_widget_set_sensitive(fs->u.ok_button, FALSE);
return (unifontsel *)fs;
}
void unifontsel_destroy(unifontsel *fontsel)
{
unifontsel_internal *fs = (unifontsel_internal *)fontsel;
fontinfo *info;
if (fs->preview_pixmap)
gdk_pixmap_unref(fs->preview_pixmap);
freetree234(fs->fonts_by_selorder);
while ((info = delpos234(fs->fonts_by_realname, 0)) != NULL)
sfree(info);
freetree234(fs->fonts_by_realname);
gtk_widget_destroy(GTK_WIDGET(fs->u.window));
sfree(fs);
}
void unifontsel_set_name(unifontsel *fontsel, const char *fontname)
{
unifontsel_internal *fs = (unifontsel_internal *)fontsel;
int i, start, end, size, flags;
const char *fontname2 = NULL;
fontinfo *info;
/*
* Provide a default if given an empty or null font name.
*/
if (!fontname || !*fontname)
fontname = "server:fixed";
/*
* Call the canonify_fontname function.
*/
fontname = unifont_do_prefix(fontname, &start, &end);
for (i = start; i < end; i++) {
fontname2 = unifont_types[i]->canonify_fontname
(GTK_WIDGET(fs->u.window), fontname, &size, &flags, FALSE);
if (fontname2)
break;
}
if (i == end)
return; /* font name not recognised */
/*
* Now look up the canonified font name in our index.
*/
{
struct fontinfo_realname_find f;
f.realname = fontname2;
f.flags = flags;
info = find234(fs->fonts_by_realname, &f, fontinfo_realname_find);
}
/*
* If we've found the font, and its size field is either
* correct or zero (the latter indicating a scalable font),
* then we're done. Otherwise, try looking up the original
* font name instead.
*/
if (!info || (info->size != size && info->size != 0)) {
struct fontinfo_realname_find f;
f.realname = fontname;
f.flags = flags;
info = find234(fs->fonts_by_realname, &f, fontinfo_realname_find);
if (!info || info->size != size)
return; /* font name not in our index */
}
/*
* Now we've got a fontinfo structure and a font size, so we
* know everything we need to fill in all the fields in the
* dialog.
*/
unifontsel_select_font(fs, info, size, 0, TRUE);
}
char *unifontsel_get_name(unifontsel *fontsel)
{
unifontsel_internal *fs = (unifontsel_internal *)fontsel;
char *name;
if (!fs->selected)
return NULL;
if (fs->selected->size == 0) {
name = fs->selected->fontclass->scale_fontname
(GTK_WIDGET(fs->u.window), fs->selected->realname, fs->selsize);
if (name) {
char *ret = dupcat(fs->selected->fontclass->prefix, ":",
name, NULL);
sfree(name);
return ret;
}
}
return dupcat(fs->selected->fontclass->prefix, ":",
fs->selected->realname, NULL);
}
#endif /* GTK_CHECK_VERSION(2,0,0) */
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