intl/lwbrk/nsCarbonBreaker.cpp
author Bill McCloskey <wmccloskey@mozilla.com>
Sat, 13 Sep 2014 11:20:16 -0700
changeset 205207 161056025760f1b74506953da9c8df17b5c18676
parent 195905 345f6e3e6972e786242960703ad5b6cdc4348602
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1047076 - Disable e10s on Nightly if Accessibility is enabled (r=felipe)

/* -*- 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);
}