1 files changed, 442 insertions, 0 deletions

diff --git a/src/devices/xditview/font.c b/src/devices/xditview/font.c
new file mode 100644
index 00000000..c111a7b9
--- /dev/null
+++ b/src/devices/xditview/font.c
@@ -0,0 +1,442 @@
+/*
+ * font.c
+ *
+ * map dvi fonts to X fonts
+ */
+
+#include <X11/Xos.h>
+#include <X11/IntrinsicP.h>
+#include <X11/StringDefs.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include "DviP.h"
+#include "XFontName.h"
+
+static void DisposeFontSizes(DviWidget, DviFontSizeList *);
+void DestroyFontMap(DviFontMap *);
+
+static char *
+savestr (const char *s)
+{
+	char	*n;
+
+	if (!s)
+		return 0;
+	n = XtMalloc (strlen (s) + 1);
+	if (n)
+		strcpy (n, s);
+	return n;
+}
+
+static DviFontList *
+LookupFontByPosition (DviWidget dw, int position)
+{
+	DviFontList	*f;
+
+	for (f = dw->dvi.fonts; f; f = f->next)
+		if (f->dvi_number == position)
+			break;
+	return f;
+}
+
+int
+MaxFontPosition (DviWidget dw)
+{
+	DviFontList	*f;
+	int n = -1;
+
+	for (f = dw->dvi.fonts; f; f = f->next)
+		if (f->dvi_number > n)
+			n = f->dvi_number;
+	return n;
+}
+
+static DviFontSizeList *
+LookupFontSizeBySize (DviWidget dw, DviFontList *f, int size)
+{
+	DviFontSizeList	*fs, *best = 0, *smallest = 0;
+	int		bestsize = 0;
+	XFontName	fontName;
+	unsigned int    fontNameAttributes;
+	char	    	fontNameString[2048];
+	int		decipointsize;
+	
+	if (f->scalable) {
+		decipointsize = (10*size)/dw->dvi.sizescale;
+		for (best = f->sizes; best; best = best->next)
+			if (best->size == decipointsize)
+				return best;
+		best = (DviFontSizeList *) XtMalloc(sizeof *best);
+		best->next = f->sizes;
+		best->size = decipointsize;
+		f->sizes = best;
+		XParseFontName (f->x_name, &fontName, &fontNameAttributes);
+		fontNameAttributes &= ~(FontNamePixelSize|FontNameAverageWidth);
+		fontNameAttributes |= FontNameResolutionX;
+		fontNameAttributes |= FontNameResolutionY;
+		fontNameAttributes |= FontNamePointSize;
+		fontName.ResolutionX = dw->dvi.display_resolution;
+		fontName.ResolutionY = dw->dvi.display_resolution;
+		fontName.PointSize = decipointsize;
+		XFormatFontName (&fontName, fontNameAttributes, fontNameString);
+		best->x_name = savestr (fontNameString);
+		best->doesnt_exist = 0;
+		best->font = 0;
+		return best;
+	}
+	for (fs = f->sizes; fs; fs=fs->next) {
+		if (dw->dvi.sizescale*fs->size <= 10*size
+		    && fs->size >= bestsize) {
+			best = fs;
+			bestsize = fs->size;
+		}
+		if (smallest == 0 || fs->size < smallest->size)
+			smallest = fs;
+	}
+	return best ? best : smallest;
+}
+
+static char *
+SkipFontNameElement (char *n)
+{
+	while (*n != '-')
+		if (!*++n)
+			return 0;
+	return n+1;
+}
+
+# define SizePosition		8
+# define EncodingPosition	13
+
+static int
+ConvertFontNameToSize (char *n)
+{
+	int	i, size;
+
+	for (i = 0; i < SizePosition; i++) {
+		n = SkipFontNameElement (n);
+		if (!n)
+			return -1;
+	}
+	size = atoi (n);
+	return size;
+}
+
+static char *
+ConvertFontNameToEncoding (char *n)
+{
+        int i;
+	for (i = 0; i < EncodingPosition; i++) {
+		n = SkipFontNameElement (n);
+		if (!n)
+			return 0;
+	}
+	return n;
+}
+
+DviFontSizeList *
+InstallFontSizes (DviWidget dw, const char *x_name, Boolean *scalablep)
+{
+	char	fontNameString[2048];
+	char	**fonts;
+	int	i, count;
+	int	size;
+	DviFontSizeList	*sizes, *new_size;
+	XFontName	fontName;
+	unsigned int	fontNameAttributes;
+
+	*scalablep = FALSE;
+	if (!XParseFontName ((XFontNameString)x_name, &fontName,
+			     &fontNameAttributes))
+		return 0;
+	fontNameAttributes &= ~(FontNamePixelSize|FontNamePointSize
+				|FontNameAverageWidth);
+	fontNameAttributes |= FontNameResolutionX;
+	fontNameAttributes |= FontNameResolutionY;
+	fontName.ResolutionX = dw->dvi.display_resolution;
+	fontName.ResolutionY = dw->dvi.display_resolution;
+	XFormatFontName (&fontName, fontNameAttributes, fontNameString);
+	fonts = XListFonts (XtDisplay (dw), fontNameString, 10000000, &count);
+	sizes = 0;
+	for (i = 0; i < count; i++) {
+		size = ConvertFontNameToSize (fonts[i]);
+		if (size == 0) {
+			DisposeFontSizes (dw, sizes);
+			sizes = 0;
+			*scalablep = TRUE;
+			break;
+		}
+		if (size != -1) {
+			new_size = (DviFontSizeList *) XtMalloc (sizeof *new_size);
+			new_size->next = sizes;
+			new_size->size = size;
+			new_size->x_name = savestr (fonts[i]);
+			new_size->doesnt_exist = 0;
+			new_size->font = 0;
+			sizes = new_size;
+		}
+	}
+	XFreeFontNames (fonts);
+	return sizes;
+}
+
+static void
+DisposeFontSizes (DviWidget dw, DviFontSizeList *fs)
+{
+	DviFontSizeList	*next;
+
+	for (; fs; fs=next) {
+		next = fs->next;
+		if (fs->x_name)
+			XtFree (fs->x_name);
+		if (fs->font && fs->font != dw->dvi.default_font) {
+			XUnloadFont (XtDisplay (dw), fs->font->fid);
+			XFree ((char *)fs->font);
+		}
+		XtFree ((char *) fs);
+	}
+}
+
+static DviFontList *
+InstallFont (DviWidget dw, int position,
+	     const char *dvi_name, const char *x_name)
+{
+	DviFontList	*f;
+	char		*encoding;
+
+	if ((f = LookupFontByPosition (dw, position)) != NULL) {
+		/*
+		 * ignore gratuitous font loading
+		 */
+		if (!strcmp (f->dvi_name, dvi_name) &&
+		    !strcmp (f->x_name, x_name))
+			return f;
+
+		DisposeFontSizes (dw, f->sizes);
+		if (f->dvi_name)
+			XtFree (f->dvi_name);
+		if (f->x_name)
+			XtFree (f->x_name);
+		f->device_font = 0;
+	} else {
+		f = (DviFontList *) XtMalloc (sizeof (*f));
+		f->next = dw->dvi.fonts;
+		dw->dvi.fonts = f;
+	}
+	f->initialized = FALSE;
+	f->dvi_name = savestr (dvi_name);
+	f->device_font = device_find_font (dw->dvi.device, dvi_name);
+	f->x_name = savestr (x_name);
+	f->dvi_number = position;
+	f->sizes = 0;
+	f->scalable = FALSE;
+	if (f->x_name) {
+		encoding = ConvertFontNameToEncoding (f->x_name);
+		f->char_map = DviFindMap (encoding);
+	} else
+		f->char_map = 0;
+	/* 
+	 * force requery of fonts
+	 */
+	dw->dvi.font = 0;
+	dw->dvi.font_number = -1;
+	dw->dvi.cache.font = 0;
+	dw->dvi.cache.font_number = -1;
+	dw->dvi.device_font = 0;
+	dw->dvi.device_font_number = -1;
+	return f;
+}
+
+void
+ForgetFonts (DviWidget dw)
+{
+	DviFontList *f = dw->dvi.fonts;
+	
+	while (f) {
+		DviFontList *tem = f;
+
+		if (f->sizes)
+			DisposeFontSizes (dw, f->sizes);
+		if (f->dvi_name)
+			XtFree (f->dvi_name);
+		if (f->x_name)
+			XtFree (f->x_name);
+		f = f->next;
+		XtFree ((char *) tem);
+	}
+	
+	/* 
+	 * force requery of fonts
+	 */
+	dw->dvi.font = 0;
+	dw->dvi.font_number = -1;
+	dw->dvi.cache.font = 0;
+	dw->dvi.cache.font_number = -1;
+	dw->dvi.device_font = 0;
+	dw->dvi.device_font_number = -1;
+	dw->dvi.fonts = 0;
+}
+
+
+static char *
+MapDviNameToXName (DviWidget dw, const char *dvi_name)
+{
+	DviFontMap	*fm;
+	
+	for (fm = dw->dvi.font_map; fm; fm=fm->next)
+		if (!strcmp (fm->dvi_name, dvi_name))
+			return fm->x_name;
+	return 0;
+}
+
+#if 0
+static char *
+MapXNameToDviName (DviWidget dw, const char *x_name)
+{
+	DviFontMap	*fm;
+	
+	for (fm = dw->dvi.font_map; fm; fm=fm->next)
+		if (!strcmp (fm->x_name, x_name))
+			return fm->dvi_name;
+	return 0;
+}
+#endif
+
+void
+ParseFontMap (DviWidget dw)
+{
+	char		dvi_name[1024];
+	char		x_name[2048];
+	char		*m, *s;
+	DviFontMap	*fm, *new_map;
+
+	if (dw->dvi.font_map)
+		DestroyFontMap (dw->dvi.font_map);
+	fm = 0;
+	m = dw->dvi.font_map_string;
+	while (*m) {
+		s = m;
+		while (*m && !isspace (*m))
+			++m;
+		strncpy (dvi_name, s, m-s);
+		dvi_name[m-s] = '\0';
+		while (isspace (*m))
+			++m;
+		s = m;
+		while (*m && *m != '\n')
+			++m;
+		strncpy (x_name, s, m-s);
+		x_name[m-s] = '\0';
+		new_map = (DviFontMap *) XtMalloc (sizeof *new_map);
+		new_map->x_name = savestr (x_name);
+		new_map->dvi_name = savestr (dvi_name);
+		new_map->next = fm;
+		fm = new_map;
+		++m;
+	}
+	dw->dvi.font_map = fm;
+}
+
+void
+DestroyFontMap (DviFontMap *font_map)
+{
+	DviFontMap	*next;
+
+	for (; font_map; font_map = next) {
+		next = font_map->next;
+		if (font_map->x_name)
+			XtFree (font_map->x_name);
+		if (font_map->dvi_name)
+			XtFree (font_map->dvi_name);
+		XtFree ((char *) font_map);
+	}
+}
+
+/* ARGSUSED */
+
+void
+SetFontPosition (DviWidget dw, int position,
+		 const char *dvi_name, const char *extra)
+{
+	char	*x_name;
+
+	x_name = MapDviNameToXName (dw, dvi_name);
+	if (x_name)
+		(void) InstallFont (dw, position, dvi_name, x_name);
+
+	extra = extra;		/* unused; suppress compiler warning */
+}
+
+XFontStruct *
+QueryFont (DviWidget dw, int position, int size)
+{
+	DviFontList	*f;
+	DviFontSizeList	*fs;
+
+	f = LookupFontByPosition (dw, position);
+	if (!f)
+		return dw->dvi.default_font;
+	if (!f->initialized) {
+		f->sizes = InstallFontSizes (dw, f->x_name, &f->scalable);
+		f->initialized = TRUE;
+	}
+	fs = LookupFontSizeBySize (dw, f, size);
+	if (!fs)
+		return dw->dvi.default_font;
+	if (!fs->font) {
+		if (fs->x_name)
+			fs->font = XLoadQueryFont (XtDisplay (dw), fs->x_name);
+		if (!fs->font)
+			fs->font = dw->dvi.default_font;
+	}
+	return fs->font;
+}
+
+DeviceFont *
+QueryDeviceFont (DviWidget dw, int position)
+{
+	DviFontList	*f;
+
+	f = LookupFontByPosition (dw, position);
+	if (!f)
+		return 0;
+	return f->device_font;
+}
+
+DviCharNameMap *
+QueryFontMap (DviWidget dw, int position)
+{
+	DviFontList	*f;
+
+	f = LookupFontByPosition (dw, position);
+	if (f)
+	    return f->char_map;
+	else
+	    return 0;
+}
+
+#if 0
+LoadFont (DviWidget dw, int position, int size)
+{
+	XFontStruct	*font;
+
+	font = QueryFont (dw, position, size);
+	dw->dvi.font_number = position;
+	dw->dvi.font_size = size;
+	dw->dvi.font = font;
+	XSetFont (XtDisplay (dw), dw->dvi.normal_GC, font->fid);
+	return;
+}
+#endif
+
+/*
+Local Variables:
+c-indent-level: 8
+c-continued-statement-offset: 8
+c-brace-offset: -8
+c-argdecl-indent: 8
+c-label-offset: -8
+c-tab-always-indent: nil
+End:
+*/