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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <WINGs/WUtil.h>
#include "../src/wconfig.h"
#include "common.h"
#define DEFAULT_FONT "sans serif:pixelsize=12"
/* X Font Name Suffix field names */
enum {
FOUNDRY,
FAMILY_NAME,
WEIGHT_NAME,
SLANT,
SETWIDTH_NAME,
ADD_STYLE_NAME,
PIXEL_SIZE,
POINT_SIZE,
RESOLUTION_X,
RESOLUTION_Y,
SPACING,
AVERAGE_WIDTH,
CHARSET_REGISTRY,
CHARSET_ENCODING
};
static int countChar(const char *str, char c)
{
int count = 0;
if (!str)
return 0;
for (; *str != 0; str++) {
if (*str == c) {
count++;
}
}
return count;
}
typedef struct str {
const char *str;
int len;
} str;
#define XLFD_TOKENS 14
static str *getXLFDTokens(const char *xlfd)
{
static str tokens[XLFD_TOKENS];
int i, len, size;
const char *ptr;
/* XXX: why does this assume there can't ever be XFNextPrefix? */
if (!xlfd || *xlfd != '-' || countChar(xlfd, '-') != XLFD_TOKENS)
return NULL;
memset(tokens, 0, sizeof(str) * XLFD_TOKENS);
len = strlen(xlfd);
for (ptr = xlfd, i = 0; i < XLFD_TOKENS && len > 0; i++) {
/* skip one '-' */
ptr++;
len--;
if (len <= 0)
break;
size = strcspn(ptr, "-,");
tokens[i].str = ptr;
tokens[i].len = size;
ptr += size;
len -= size;
}
return tokens;
}
static int strToInt(str * token)
{
static char buf[32]; /* enough for an Incredibly Big Number */
if (token->len == 0 ||
token->str[0] == '*' ||
token->len >= sizeof(buf))
return -1;
memset(buf, 0, sizeof(buf));
strncpy(buf, token->str, token->len);
/* the code using this will gracefully handle overflows */
return (int)strtol(buf, NULL, 10);
}
static char *mapWeightToName(str * weight)
{
static const char *normalNames[] = { "medium", "normal", "regular" };
static char buf[32];
size_t i;
if (weight->len == 0)
return "";
for (i = 0; i < wlengthof(normalNames); i++) {
if (strlen(normalNames[i]) == weight->len && strncmp(normalNames[i], weight->str, weight->len)) {
return "";
}
}
snprintf(buf, sizeof(buf), ":%.*s", weight->len, weight->str);
return buf;
}
static char *mapSlantToName(str * slant)
{
if (slant->len == 0)
return "";
switch (slant->str[0]) {
case 'i':
return ":italic";
case 'o':
return ":oblique";
case 'r':
default:
return "";
}
}
static char *xlfdToFc(const char *xlfd, const char *useFamily, Bool keepXLFD)
{
str *tokens, *family, *weight, *slant;
char *name, buf[64];
int size, pixelsize;
tokens = getXLFDTokens(xlfd);
if (!tokens)
return wstrdup(DEFAULT_FONT);
family = &(tokens[FAMILY_NAME]);
weight = &(tokens[WEIGHT_NAME]);
slant = &(tokens[SLANT]);
pixelsize = strToInt(&tokens[PIXEL_SIZE]);
size = strToInt(&tokens[POINT_SIZE]);
if (useFamily) {
name = wstrdup(useFamily);
} else {
if (family->len == 0 || family->str[0] == '*')
return wstrdup(DEFAULT_FONT);
snprintf(buf, sizeof(buf), "%.*s", family->len, family->str);
name = wstrdup(buf);
}
if (size > 0 && pixelsize <= 0) {
snprintf(buf, sizeof(buf), "-%d", size / 10);
name = wstrappend(name, buf);
}
name = wstrappend(name, mapWeightToName(weight));
name = wstrappend(name, mapSlantToName(slant));
if (size <= 0 && pixelsize <= 0) {
name = wstrappend(name, ":pixelsize=12");
} else if (pixelsize > 0) {
/* if pixelsize is present size will be ignored so we skip it */
snprintf(buf, sizeof(buf), ":pixelsize=%d", pixelsize);
name = wstrappend(name, buf);
}
if (keepXLFD) {
name = wstrappend(name, ":xlfd=");
name = wstrappend(name, xlfd);
}
return name;
}
/* return converted font (if conversion is needed) else the original font */
char *convertFont(char *font, Bool keepXLFD)
{
if (font[0] == '-') {
if (MB_CUR_MAX < 2) {
return xlfdToFc(font, NULL, keepXLFD);
} else {
return xlfdToFc(font, "sans serif", keepXLFD);
}
} else {
return font;
}
}
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