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// Copyright 2013 The Servo Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use super::frame::{CTFrame, CTFrameRef};
use core_foundation::attributed_string::CFAttributedStringRef;
use core_foundation::base::{CFRange, CFTypeID, TCFType};
use core_foundation::dictionary::CFDictionaryRef;
use core_graphics::geometry::CGSize;
use core_graphics::path::{CGPath, CGPathRef};
use foreign_types::{ForeignType, ForeignTypeRef};
use std::os::raw::c_void;
use std::ptr::null;
#[repr(C)]
pub struct __CTFramesetter(c_void);
pub type CTFramesetterRef = *const __CTFramesetter;
declare_TCFType! {
CTFramesetter, CTFramesetterRef
}
impl_TCFType!(CTFramesetter, CTFramesetterRef, CTFramesetterGetTypeID);
impl_CFTypeDescription!(CTFramesetter);
impl CTFramesetter {
pub fn new_with_attributed_string(string: CFAttributedStringRef) -> Self {
unsafe {
let ptr = CTFramesetterCreateWithAttributedString(string);
CTFramesetter::wrap_under_create_rule(ptr)
}
}
pub fn create_frame(&self, string_range: CFRange, path: &CGPathRef) -> CTFrame {
unsafe {
let ptr = CTFramesetterCreateFrame(
self.as_concrete_TypeRef(),
string_range,
path.as_ptr(),
null(),
);
CTFrame::wrap_under_create_rule(ptr)
}
}
/// Suggest an appropriate frame size for displaying a text range.
///
/// Returns a tuple containing an appropriate size (that should be smaller
/// than the provided constraints) as well as the range of text that fits in
/// this frame.
pub fn suggest_frame_size_with_constraints(
&self,
string_range: CFRange,
frame_attributes: CFDictionaryRef,
constraints: CGSize,
) -> (CGSize, CFRange) {
unsafe {
let mut fit_range = CFRange::init(0, 0);
let size = CTFramesetterSuggestFrameSizeWithConstraints(
self.as_concrete_TypeRef(),
string_range,
frame_attributes,
constraints,
&mut fit_range,
);
(size, fit_range)
}
}
}
#[link(name = "CoreText", kind = "framework")]
extern "C" {
fn CTFramesetterGetTypeID() -> CFTypeID;
fn CTFramesetterCreateWithAttributedString(string: CFAttributedStringRef) -> CTFramesetterRef;
fn CTFramesetterCreateFrame(
framesetter: CTFramesetterRef,
string_range: CFRange,
path: *mut <CGPath as ForeignType>::CType,
attributes: *const c_void,
) -> CTFrameRef;
fn CTFramesetterSuggestFrameSizeWithConstraints(
framesetter: CTFramesetterRef,
string_range: CFRange,
frame_attributes: CFDictionaryRef,
constraints: CGSize,
fitRange: *mut CFRange,
) -> CGSize;
}