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