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use std::ops::Deref;
use std::ptr::NonNull;
use foreign_types::{foreign_type, ForeignType, ForeignTypeRef};
use log::trace;
use super::{ConfigRef, ObjectSetRef, PatternRef};
use super::ffi::{FcFontSet, FcFontSetDestroy, FcFontSetList};
foreign_type! {
pub unsafe type FontSet {
type CType = FcFontSet;
fn drop = FcFontSetDestroy;
}
}
impl FontSet {
pub fn list(
config: &ConfigRef,
source: &mut FontSetRef,
pattern: &PatternRef,
objects: &ObjectSetRef,
) -> FontSet {
let raw = unsafe {
FcFontSetList(
config.as_ptr(),
&mut source.as_ptr(),
1, // nsets.
pattern.as_ptr(),
objects.as_ptr(),
)
};
FontSet(NonNull::new(raw).unwrap())
}
}
/// Iterator over a font set.
pub struct Iter<'a> {
font_set: &'a FontSetRef,
num_fonts: usize,
current: usize,
}
impl<'a> IntoIterator for &'a FontSet {
type IntoIter = Iter<'a>;
type Item = &'a PatternRef;
fn into_iter(self) -> Iter<'a> {
let num_fonts = unsafe { (*self.as_ptr()).nfont as isize };
trace!("Number of fonts is {}", num_fonts);
Iter { font_set: self.deref(), num_fonts: num_fonts as _, current: 0 }
}
}
impl<'a> IntoIterator for &'a FontSetRef {
type IntoIter = Iter<'a>;
type Item = &'a PatternRef;
fn into_iter(self) -> Iter<'a> {
let num_fonts = unsafe { (*self.as_ptr()).nfont as isize };
trace!("Number of fonts is {}", num_fonts);
Iter { font_set: self, num_fonts: num_fonts as _, current: 0 }
}
}
impl<'a> Iterator for Iter<'a> {
type Item = &'a PatternRef;
fn next(&mut self) -> Option<Self::Item> {
if self.current == self.num_fonts {
None
} else {
let pattern = unsafe {
let ptr = *(*self.font_set.as_ptr()).fonts.add(self.current);
PatternRef::from_ptr(ptr)
};
self.current += 1;
Some(pattern)
}
}
}
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