// Text renders a string of text at a specified location, size, using the specified font glyphs
// derived from http://web.archive.org/web/20070808195131/http://developer.hybrid.fi/font2openvg/renderFont.cpp.txt
void Text(VGfloat x, VGfloat y, const char *s, Fontinfo f, int pointsize) {
VGfloat size = (VGfloat) pointsize, xx = x, mm[9];
vgGetMatrix(mm);
int character;
unsigned char *ss = (unsigned char *)s;
while ((ss = next_utf8_char(ss, &character)) != NULL) {
int glyph = f.CharacterMap[character];
if (character >= MAXFONTPATH-1) {
continue;
}
if (glyph == -1) {
continue; //glyph is undefined
}
VGfloat mat[9] = {
size, 0.0f, 0.0f,
0.0f, size, 0.0f,
xx, y, 1.0f
};
vgLoadMatrix(mm);
vgMultMatrix(mat);
vgDrawPath(f.Glyphs[glyph], VG_FILL_PATH);
xx += size * f.GlyphAdvances[glyph] / 65536.0f;
}
vgLoadMatrix(mm);
}
static void
delete_before_cursor(struct virtual_keyboard *keyboard)
{
const char *start, *end;
if (!keyboard->surrounding_text) {
fprintf(stderr, "delete_before_cursor: No surrounding text available\n");
return;
}
start = prev_utf8_char(keyboard->surrounding_text,
keyboard->surrounding_text + keyboard->surrounding_cursor);
if (!start) {
fprintf(stderr, "delete_before_cursor: No previous character to delete\n");
return;
}
end = next_utf8_char(start);
wl_input_method_context_delete_surrounding_text(keyboard->context,
(start - keyboard->surrounding_text) - keyboard->surrounding_cursor,
end - start);
wl_input_method_context_commit_string(keyboard->context,
keyboard->serial,
"");
/* Update surrounding text */
keyboard->surrounding_cursor = start - keyboard->surrounding_text;
keyboard->surrounding_text[keyboard->surrounding_cursor] = '\0';
if (*end)
memmove(keyboard->surrounding_text + keyboard->surrounding_cursor, end, strlen(end));
}
// TextWidth returns the width of a text string at the specified font and size.
VGfloat TextWidth(const char *s, Fontinfo f, int pointsize) {
VGfloat tw = 0.0;
VGfloat size = (VGfloat) pointsize;
int character;
unsigned char *ss = (unsigned char *)s;
while ((ss = next_utf8_char(ss, &character)) != NULL) {
int glyph = f.CharacterMap[character];
if (character >= MAXFONTPATH-1) {
continue;
}
if (glyph == -1) {
continue; //glyph is undefined
}
tw += size * f.GlyphAdvances[glyph] / 65536.0f;
}
return tw;
}
int escape_json_string(YUString *out, char *in, size_t len) {
unsigned char *p;
unsigned char *oldp;
unsigned char *end;
int skiplen;
uint32_t unichar;
p = (unsigned char*)in;
end = p + len;
while (p != end) {
unichar = next_utf8_char((char*)p,(char*)end,&skiplen);
if (skiplen == 0) {
yu_string_sprintfa(out, "\\u%04x",*p++);
continue;
}
oldp = p;
p += skiplen;
switch (unichar) {
case ' ': yu_string_append0(out, " "); continue;
case '\b': yu_string_append0(out,"\\b"); continue;
case '\f': yu_string_append0(out,"\\f"); continue;
case '\n': yu_string_append0(out,"\\n"); continue;
case '\r': yu_string_append0(out,"\\r"); continue;
case '\t': yu_string_append0(out,"\\t"); continue;
case '\v': yu_string_append0(out,"\\v"); continue;
case '"': yu_string_append0(out,"\\\"");continue;
case '\\': yu_string_append0(out,"\\\\");continue;
}
if (unichar < 32) {
yu_string_sprintfa(out, "\\u%04x",unichar);
continue;
}
yu_string_append(out,(char*)oldp,(size_t)skiplen);
}
return 0;
}