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// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::ops::Deref;
use foreign_types::{ForeignType, ForeignTypeRef};
use super::{ConfigRef, PatternRef, ObjectSetRef};
use super::ffi::{FcFontSetList, FcFontSetDestroy, FcFontSet};
foreign_type! {
type CType = FcFontSet;
fn drop = FcFontSetDestroy;
/// Wraps an FcFontSet instance (owned)
pub struct FontSet;
/// Wraps an FcFontSet reference (borrowed)
pub struct FontSetRef;
}
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(raw)
}
}
/// 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 Item = &'a PatternRef;
type IntoIter = Iter<'a>;
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 Item = &'a PatternRef;
type IntoIter = Iter<'a>;
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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