/*
* return value - 0: remove ok, -1: no key to remove
*/
int password_remove_char(void)
{
int x;
if (password_str_len == 0)
return -1;
password_string[--password_str_len] = '\0';
x = render_string(SUBTITLE_FONT_IDX, 38, 85, password_string, strlen(password_string), 0);
guilib_clear_area(x, 85, 172, 103);
return 0;
}
int render_string_and_clear(const int font, int start_x,
int start_y, char *string, int text_length, int inverted,
int clear_start_x, int clear_start_y, int clear_end_x, int clear_end_y)
{
int x;
int width;
int height;
long len = text_length;
long lenLast = 0;
long widthLast = 0;
char *p = (char *)string;
unsigned char *q;
int nCharBytes;
ucs4_t c;
if (clear_start_x >= 0 && clear_start_y < start_y)
{
if (clear_end_y < start_y)
{
guilib_clear_area(clear_start_x, clear_start_y, clear_end_x, clear_end_y);
clear_start_x = -1; // no more area to clear
}
else
{
guilib_clear_area(clear_start_x, clear_start_y, clear_end_x, start_y - 1);
clear_start_y = start_y;
}
}
if (start_x < 0)
width = 0;
else
width = start_x;
height = GetFontLinespace(font);
while (len > 0 && width < LCD_BUF_WIDTH_PIXELS)
{
lenLast = len;
widthLast = width;
width += get_UTF8_char_width(font, &p, &len, &nCharBytes);
}
if (width > LCD_BUF_WIDTH_PIXELS)
{
text_length -= lenLast;
width = widthLast;
}
if (start_x < 0) // to be centered
{
start_x = (LCD_BUF_WIDTH_PIXELS - width) / 2;
if (start_x < 0)
start_x = 0;
}
if (clear_start_y < start_y + height)
{
if (clear_start_x < start_x)
guilib_clear_area(clear_start_x, clear_start_y, start_x - 1,
clear_end_y < start_x + height ? clear_end_y : start_x + height - 1);
if (clear_end_x >= width)
guilib_clear_area(width, clear_start_y, clear_end_x,
clear_end_y < start_x + height ? clear_end_y : start_x + height - 1);
if (clear_end_y >= start_y + height)
clear_start_y = start_x + height;
else
clear_start_x = -1;
}
if (clear_start_x >= 0)
guilib_clear_area(clear_start_x, clear_start_y, clear_end_x, clear_end_y);
x = start_x;
q = (unsigned char *)string;
while (*q) {
c = UTF8_to_UCS4(&q);
x = draw_bmf_char(c,font-1,x,start_y, inverted, 1);
if(x<0)
return 0;
}
return x;
}
