/**
* Paint a string.
*
* \param fstyle plot style for this text
* \param string UTF-8 string to measure
* \param length length of string
* \param x x coordinate
* \param y y coordinate
* \return true on success, false on error and error reported
*/
bool nsfont_paint(const plot_font_style_t *fstyle, const char *string,
size_t length, int x, int y)
{
const char *font_family;
unsigned int font_size;
unsigned int flags = rufl_BLEND_FONT;
rufl_style font_style;
rufl_code code;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
if (font_size == 0)
return true;
if (no_font_blending || print_active)
flags = 0;
code = rufl_paint(font_family, font_style, font_size,
string, length, x, y, flags);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR) {
LOG("rufl_paint: rufl_FONT_MANAGER_ERROR: 0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
} else {
LOG("rufl_paint: 0x%x", code);
}
}
return true;
}
/**
* Find the position in a string where an x coordinate falls.
*
* \param fstyle style for this text
* \param string UTF-8 string to measure
* \param length length of string
* \param x x coordinate to search for
* \param char_offset updated to offset in string of actual_x, [0..length]
* \param actual_x updated to x coordinate of character closest to x
* \return true on success, false on error and error reported
*/
static nserror
ro_font_position(const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
if (font_size == 0) {
*char_offset = 0;
*actual_x = 0;
return NSERROR_OK;
}
code = rufl_x_to_offset(font_family, font_style, font_size,
string, length,
x * 2, char_offset, actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG("rufl_x_to_offset: rufl_FONT_MANAGER_ERROR: ""0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
else
LOG("rufl_x_to_offset: 0x%x", code);
/* ro_warn_user("MiscError", "font error"); */
*char_offset = 0;
*actual_x = 0;
return NSERROR_INVALID;
}
*actual_x /= 2;
return NSERROR_OK;
}
/**
* Measure the width of a string.
*
* \param fstyle plot style for this text
* \param string UTF-8 string to measure
* \param length length of string
* \param width updated to width of string[0..length)
* \return true on success, false on error and error reported
*/
static nserror
ro_font_width(const plot_font_style_t *fstyle,
const char *string, size_t length,
int *width)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
if (font_size == 0) {
*width = 0;
return NSERROR_OK;
}
code = rufl_width(font_family, font_style, font_size,
string, length,
width);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
else
LOG("rufl_width: 0x%x", code);
/* ro_warn_user("MiscError", "font error"); */
*width = 0;
return NSERROR_INVALID;
}
*width /= 2;
return NSERROR_OK;
}
bool nsfont_split(const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
if (font_size == 0) {
*char_offset = 0;
*actual_x = 0;
return true;
}
code = rufl_split(font_family, font_style, font_size,
string, length,
x * 2, char_offset, actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_split: rufl_FONT_MANAGER_ERROR: "
"0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_split: 0x%x", code));
/* warn_user("MiscError", "font error"); */
return false;
}
while (*char_offset && string[*char_offset] != ' ')
(*char_offset)--;
code = rufl_width(font_family, font_style, font_size,
string, *char_offset,
actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_width: 0x%x", code));
/* warn_user("MiscError", "font error"); */
return false;
}
*actual_x /= 2;
return true;
}
bool ro_save_draw_text(int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle)
{
pencil_code code;
const char *font_family;
unsigned int font_size;
rufl_style font_style;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
code = pencil_text(ro_save_draw_diagram, x * 2, -y * 2, font_family,
font_style, font_size, text, length,
fstyle->foreground << 8);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
/**
* Find where to split a string to make it fit a width.
*
* \param fstyle style for this text
* \param string UTF-8 string to measure
* \param length length of string, in bytes
* \param x width available
* \param char_offset updated to offset in string of actual_x, [1..length]
* \param actual_x updated to x coordinate of character closest to x
* \return true on success, false on error and error reported
*
* On exit, char_offset indicates first character after split point.
*
* Note: char_offset of 0 should never be returned.
*
* Returns:
* char_offset giving split point closest to x, where actual_x <= x
* else
* char_offset giving split point closest to x, where actual_x > x
*
* Returning char_offset == length means no split possible
*/
static nserror
ro_font_split(const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
if (font_size == 0) {
*char_offset = 0;
*actual_x = 0;
return NSERROR_OK;
}
code = rufl_split(font_family, font_style, font_size,
string, length,
x * 2, char_offset, actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR) {
LOG("rufl_split: rufl_FONT_MANAGER_ERROR: ""0x%x: %s",
rufl_fm_error->errnum, rufl_fm_error->errmess);
} else {
LOG("rufl_split: 0x%x", code);
}
/* ro_warn_user("MiscError", "font error"); */
*char_offset = 0;
*actual_x = 0;
return NSERROR_INVALID;
}
if (*char_offset != length) {
/* we found something to split at */
size_t orig = *char_offset;
/* ensure a space at <= the split point we found */
while (*char_offset && string[*char_offset] != ' ') {
(*char_offset)--;
}
/* nothing valid found <= split point, advance to next space */
if (*char_offset == 0) {
*char_offset = orig;
while ((*char_offset != length) &&
(string[*char_offset] != ' ')) {
(*char_offset)++;
}
}
}
code = rufl_width(font_family, font_style, font_size,
string, *char_offset,
actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR) {
LOG("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s",
rufl_fm_error->errnum, rufl_fm_error->errmess);
} else {
LOG("rufl_width: 0x%x", code);
}
/* ro_warn_user("MiscError", "font error"); */
*char_offset = 0;
*actual_x = 0;
return NSERROR_INVALID;
}
*actual_x /= 2;
return NSERROR_OK;
}
