1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// 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
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use core_foundation::base::{CFIndex, CFRange, CFType, CFTypeID, TCFType};
use core_foundation::dictionary::{CFDictionary, CFDictionaryRef};
use core_foundation::string::CFString;
use core_graphics::font::CGGlyph;
use core_graphics::geometry::CGPoint;
use std::borrow::Cow;
use std::os::raw::c_void;
use std::slice;
#[repr(C)]
pub struct __CTRun(c_void);
pub type CTRunRef = *const __CTRun;
declare_TCFType! {
CTRun, CTRunRef
}
impl_TCFType!(CTRun, CTRunRef, CTRunGetTypeID);
impl_CFTypeDescription!(CTRun);
impl CTRun {
pub fn attributes(&self) -> Option<CFDictionary<CFString, CFType>> {
unsafe {
let attrs = CTRunGetAttributes(self.0);
if attrs.is_null() {
return None;
}
Some(TCFType::wrap_under_get_rule(attrs))
}
}
pub fn glyph_count(&self) -> CFIndex {
unsafe { CTRunGetGlyphCount(self.0) }
}
pub fn glyphs(&self) -> Cow<[CGGlyph]> {
unsafe {
// CTRunGetGlyphsPtr can return null under some not understood circumstances.
// If it does the Apple documentation tells us to allocate our own buffer and call
// CTRunGetGlyphs
let count = CTRunGetGlyphCount(self.0);
let glyphs_ptr = CTRunGetGlyphsPtr(self.0);
if !glyphs_ptr.is_null() {
Cow::from(slice::from_raw_parts(glyphs_ptr, count as usize))
} else {
let mut vec = Vec::with_capacity(count as usize);
// "If the length of the range is set to 0, then the copy operation will continue
// from the start index of the range to the end of the run"
CTRunGetGlyphs(self.0, CFRange::init(0, 0), vec.as_mut_ptr());
vec.set_len(count as usize);
Cow::from(vec)
}
}
}
pub fn positions(&self) -> Cow<[CGPoint]> {
unsafe {
// CTRunGetPositionsPtr can return null under some not understood circumstances.
// If it does the Apple documentation tells us to allocate our own buffer and call
// CTRunGetPositions
let count = CTRunGetGlyphCount(self.0);
let positions_ptr = CTRunGetPositionsPtr(self.0);
if !positions_ptr.is_null() {
Cow::from(slice::from_raw_parts(positions_ptr, count as usize))
} else {
let mut vec = Vec::with_capacity(count as usize);
// "If the length of the range is set to 0, then the copy operation will continue
// from the start index of the range to the end of the run"
CTRunGetPositions(self.0, CFRange::init(0, 0), vec.as_mut_ptr());
vec.set_len(count as usize);
Cow::from(vec)
}
}
}
pub fn string_indices(&self) -> Cow<[CFIndex]> {
unsafe {
// CTRunGetStringIndicesPtr can return null under some not understood circumstances.
// If it does the Apple documentation tells us to allocate our own buffer and call
// CTRunGetStringIndices
let count = CTRunGetGlyphCount(self.0);
let indices_ptr = CTRunGetStringIndicesPtr(self.0);
if !indices_ptr.is_null() {
Cow::from(slice::from_raw_parts(indices_ptr, count as usize))
} else {
let mut vec = Vec::with_capacity(count as usize);
// "If the length of the range is set to 0, then the copy operation will continue
// from the start index of the range to the end of the run"
CTRunGetStringIndices(self.0, CFRange::init(0, 0), vec.as_mut_ptr());
vec.set_len(count as usize);
Cow::from(vec)
}
}
}
}
#[test]
fn create_runs() {
use core_foundation::attributed_string::CFMutableAttributedString;
use font;
use line::*;
use string_attributes::*;
let mut string = CFMutableAttributedString::new();
string.replace_str(&CFString::new("Food"), CFRange::init(0, 0));
let len = string.char_len();
unsafe {
string.set_attribute(
CFRange::init(0, len),
kCTFontAttributeName,
&font::new_from_name("Helvetica", 16.).unwrap(),
);
}
let line = CTLine::new_with_attributed_string(string.as_concrete_TypeRef());
let runs = line.glyph_runs();
assert_eq!(runs.len(), 1);
for run in runs.iter() {
assert_eq!(run.glyph_count(), 4);
let font = run
.attributes()
.unwrap()
.get(CFString::new("NSFont"))
.downcast::<font::CTFont>()
.unwrap();
assert_eq!(font.pt_size(), 16.);
let positions = run.positions();
assert_eq!(positions.len(), 4);
assert!(positions[0].x < positions[1].x);
let glyphs = run.glyphs();
assert_eq!(glyphs.len(), 4);
assert_ne!(glyphs[0], glyphs[1]);
assert_eq!(glyphs[1], glyphs[2]);
let indices = run.string_indices();
assert_eq!(indices.as_ref(), &[0, 1, 2, 3]);
}
}
#[link(name = "CoreText", kind = "framework")]
extern "C" {
fn CTRunGetTypeID() -> CFTypeID;
fn CTRunGetAttributes(run: CTRunRef) -> CFDictionaryRef;
fn CTRunGetGlyphCount(run: CTRunRef) -> CFIndex;
fn CTRunGetPositionsPtr(run: CTRunRef) -> *const CGPoint;
fn CTRunGetPositions(run: CTRunRef, range: CFRange, buffer: *const CGPoint);
fn CTRunGetStringIndicesPtr(run: CTRunRef) -> *const CFIndex;
fn CTRunGetStringIndices(run: CTRunRef, range: CFRange, buffer: *const CFIndex);
fn CTRunGetGlyphsPtr(run: CTRunRef) -> *const CGGlyph;
fn CTRunGetGlyphs(run: CTRunRef, range: CFRange, buffer: *const CGGlyph);
}
|
