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