intl/lwbrk/nsUniscribeBreaker.cpp
author Mark Banner <standard8@mozilla.com>
Sat, 16 Jun 2018 08:20:38 +0000
changeset 477007 70bab1329de06ec38a8fecd3e553b68007f4a6d2
parent 416428 6a629adbb62a299d7208373d1c6f375149d2afdb
child 505383 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1456762 - Add parsing of HTML files to ESLint to discover their script tags and the globals that are imported. r=mossop MozReview-Commit-ID: 6jiEbZnyv6e Differential Revision: https://phabricator.services.mozilla.com/D1643

/* -*- 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 "nsComplexBreaker.h"

#include <windows.h>

#include <usp10.h>

#include "nsUTF8Utils.h"
#include "nsString.h"
#include "nsTArray.h"

void
NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
                        uint8_t* aBreakBefore)
{
  NS_ASSERTION(aText, "aText shouldn't be null");

  int outItems = 0;
  HRESULT result;
  AutoTArray<SCRIPT_ITEM, 64> items;
  char16ptr_t text = aText;

  memset(aBreakBefore, false, aLength);

  if (!items.AppendElements(64))
    return;

  do {
    result = ScriptItemize(text, aLength, items.Length(), nullptr, nullptr,
                           items.Elements(), &outItems);

    if (result == E_OUTOFMEMORY) {
      if (!items.AppendElements(items.Length()))
        return;
    }
  } while (result == E_OUTOFMEMORY);

  for (int iItem = 0; iItem < outItems; ++iItem)  {
    uint32_t endOffset = (iItem + 1 == outItems ? aLength : items[iItem + 1].iCharPos);
    uint32_t startOffset = items[iItem].iCharPos;
    AutoTArray<SCRIPT_LOGATTR, 64> sla;

    if (!sla.AppendElements(endOffset - startOffset))
      return;

    if (ScriptBreak(text + startOffset, endOffset - startOffset,
                    &items[iItem].a,  sla.Elements()) < 0)
      return;

    for (uint32_t j=0; j+startOffset < endOffset; ++j) {
       aBreakBefore[j+startOffset] = sla[j].fSoftBreak;
    }
  }
}