CL_Size CL_Font::get_text_size(CL_GraphicContext &gc, const CL_StringRef &text)
{
CL_Size total_size;
if (!impl.is_null())
{
CL_FontMetrics fm = get_font_metrics(gc);
int line_spacing = fm.get_external_leading();
std::vector<CL_String> lines = CL_StringHelp::split_text(text, "\n", false);
for (std::vector<CL_String>::size_type i=0; i<lines.size(); i++)
{
CL_Size line_size = get_provider()->get_text_size(gc, lines[i]);
if ((line_size.width == 0) && (line_size.height == 0) && (lines.size() > 1)) // blank line
line_size.height = fm.get_descent() + fm.get_ascent();
if ((i+1) != lines.size()) // Do not add the line spacing on the last line
line_size.height += line_spacing;
if (total_size.width < line_size.width) // Find the widest line
total_size.width = line_size.width;
total_size.height += line_size.height;
}
}
return total_size;
}
int CL_GlyphCache::get_character_index(CL_FontEngine *font_engine, CL_GraphicContext &gc, const CL_String &text, const CL_Point &point)
{
int dest_x = 0;
int dest_y = 0;
int character_counter = 0;
CL_FontMetrics fm = get_font_metrics();
int font_height = fm.get_height();
int font_ascent = fm.get_ascent();
int font_external_leading = fm.get_external_leading();
std::vector<CL_String> lines = CL_StringHelp::split_text(text, "\n", false);
for (std::vector<CL_String>::size_type i=0; i<lines.size(); i++)
{
int xpos = dest_x;
int ypos = dest_y;
CL_String &textline = lines[i];
CL_String::size_type string_length = textline.length();
// Scan the string
CL_UTF8_Reader reader(textline);
while(!reader.is_end())
{
unsigned int glyph = reader.get_char();
CL_String::size_type glyph_pos = reader.get_position();
reader.next();
CL_Font_TextureGlyph *gptr = get_glyph(font_engine, gc, glyph);
if (gptr == NULL) continue;
CL_Rect position(xpos, ypos - font_ascent, CL_Size(gptr->increment.x, gptr->increment.y + font_height + font_external_leading));
if (position.contains(point))
{
return glyph_pos + character_counter;
}
xpos += gptr->increment.x;
ypos += gptr->increment.y;
}
dest_y += font_height + font_external_leading;
character_counter += string_length + 1; // (Including the '\n')
}
return -1; // Not found
}
void CL_Font::draw_text(CL_GraphicContext &gc, float dest_x, float dest_y, const CL_StringRef &text, const CL_Colorf &color)
{
if (!impl.is_null())
{
CL_FontMetrics fm = get_font_metrics(gc);
int line_spacing = fm.get_height() + fm.get_external_leading();
std::vector<CL_String> lines = CL_StringHelp::split_text(text, "\n", false);
for (std::vector<CL_String>::size_type i=0; i<lines.size(); i++)
{
get_provider()->draw_text(gc, dest_x, dest_y, lines[i], color);
dest_y += line_spacing;
}
}
}
