1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include <CoreFoundation/CoreFoundation.h>
7 #include <stdint.h>
8 #include "nsDebug.h"
9 #include "nscore.h"
10
NS_GetComplexLineBreaks(const char16_t * aText,uint32_t aLength,uint8_t * aBreakBefore)11 void NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
12 uint8_t* aBreakBefore) {
13 NS_ASSERTION(aText, "aText shouldn't be null");
14
15 memset(aBreakBefore, 0, aLength * sizeof(uint8_t));
16
17 CFStringRef str = ::CFStringCreateWithCharactersNoCopy(
18 kCFAllocatorDefault, reinterpret_cast<const UniChar*>(aText), aLength,
19 kCFAllocatorNull);
20 if (!str) {
21 return;
22 }
23
24 CFStringTokenizerRef st = ::CFStringTokenizerCreate(
25 kCFAllocatorDefault, str, ::CFRangeMake(0, aLength),
26 kCFStringTokenizerUnitLineBreak, nullptr);
27 if (!st) {
28 ::CFRelease(str);
29 return;
30 }
31
32 CFStringTokenizerTokenType tt = ::CFStringTokenizerAdvanceToNextToken(st);
33 while (tt != kCFStringTokenizerTokenNone) {
34 CFRange r = ::CFStringTokenizerGetCurrentTokenRange(st);
35 if (r.location != 0) { // Ignore leading edge
36 aBreakBefore[r.location] = true;
37 }
38 tt = CFStringTokenizerAdvanceToNextToken(st);
39 }
40
41 ::CFRelease(st);
42 ::CFRelease(str);
43 }
44