/**
* Measure the width of a string.
*
* \param fstyle style for this text
* \param string string to measure (no UTF-8 currently)
* \param length length of string
* \param width updated to width of string[0..length]
* \return true on success, false on error and error reported
*/
bool haru_nsfont_width(const plot_font_style_t *fstyle,
const char *string, size_t length,
int *width)
{
HPDF_Doc pdf;
HPDF_Page page;
char *string_nt;
HPDF_REAL width_real;
*width = 0;
if (length == 0)
return true;
if (!haru_nsfont_init(&pdf, &page, string, &string_nt, length))
return false;
if (!haru_nsfont_apply_style(fstyle, pdf, page, NULL, NULL)) {
free(string_nt);
HPDF_Free(pdf);
return false;
}
width_real = HPDF_Page_TextWidth(page, string_nt);
*width = width_real;
#ifdef FONT_HARU_DEBUG
LOG("Measuring string: %s ; Calculated width: %f %i", string_nt, width_real, *width);
#endif
free(string_nt);
HPDF_Free(pdf);
return true;
}
bool haru_nsfont_position_in_string(const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
HPDF_Doc pdf;
HPDF_Page page;
char *string_nt;
HPDF_UINT offset;
HPDF_REAL real_width;
if (!haru_nsfont_init(&pdf, &page, string, &string_nt, length))
return false;
if (HPDF_Page_SetWidth(page, x) != HPDF_OK
|| !haru_nsfont_apply_style(fstyle, pdf, page, NULL, NULL)) {
free(string_nt);
HPDF_Free(pdf);
return false;
}
offset = HPDF_Page_MeasureText(page, string_nt, x,
HPDF_FALSE, &real_width);
if (real_width < x)
*char_offset = offset;
else {
assert(fabs(real_width - x) < FLT_EPSILON);
assert(offset > 0);
*char_offset = offset - 1;
}
/*TODO: this is only the right edge of the character*/
*actual_x = real_width;
#ifdef FONT_HARU_DEBUG
LOG("Position in string: %s at x: %i; Calculated position: %i", string_nt, x, *char_offset);
#endif
free(string_nt);
HPDF_Free(pdf);
return true;
}
bool haru_nsfont_split(const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
HPDF_Doc pdf;
HPDF_Page page;
char *string_nt;
HPDF_REAL real_width;
HPDF_UINT offset;
if (!haru_nsfont_init(&pdf, &page, string, &string_nt, length))
return false;
if (HPDF_Page_SetWidth(page, x) != HPDF_OK
|| !haru_nsfont_apply_style(fstyle, pdf, page, NULL, NULL)) {
free(string_nt);
HPDF_Free(pdf);
return false;
}
offset = HPDF_Page_MeasureText(page, string_nt, x,
HPDF_TRUE, &real_width);
#ifdef FONT_HARU_DEBUG
LOG("Splitting string: %s for width: %i ; Calculated position: %i Calculated real_width: %f", string_nt, x, *char_offset, real_width);
#endif
*char_offset = offset - 1;
/*TODO: this is only the right edge of the character*/
*actual_x = real_width;
free(string_nt);
HPDF_Free(pdf);
return true;
}
