michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <CoreFoundation/CoreFoundation.h>
michael@0: #include <stdint.h>
michael@0: #include "nsDebug.h"
michael@0: #include "nscore.h"
michael@0: 
michael@0: void
michael@0: NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
michael@0:                         uint8_t* aBreakBefore)
michael@0: {
michael@0:   NS_ASSERTION(aText, "aText shouldn't be null");
michael@0: 
michael@0:   memset(aBreakBefore, 0, aLength * sizeof(uint8_t));
michael@0: 
michael@0:   CFStringRef str = ::CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, reinterpret_cast<const UniChar*>(aText), aLength, kCFAllocatorNull);
michael@0:   if (!str) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   CFStringTokenizerRef st = ::CFStringTokenizerCreate(kCFAllocatorDefault, str,
michael@0:                                                       ::CFRangeMake(0, aLength),
michael@0:                                                       kCFStringTokenizerUnitLineBreak,
michael@0:                                                       nullptr);
michael@0:   if (!st) {
michael@0:     ::CFRelease(str);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   CFStringTokenizerTokenType tt = ::CFStringTokenizerAdvanceToNextToken(st);
michael@0:   while (tt != kCFStringTokenizerTokenNone) {
michael@0:     CFRange r = ::CFStringTokenizerGetCurrentTokenRange(st);
michael@0:     if (r.location != 0) { // Ignore leading edge
michael@0:       aBreakBefore[r.location] = true;
michael@0:     }
michael@0:     tt = CFStringTokenizerAdvanceToNextToken(st);
michael@0:   }
michael@0: 
michael@0:   ::CFRelease(st);
michael@0:   ::CFRelease(str);
michael@0: }