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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 "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);
items.AppendElements(64);
do {
result = ScriptItemize(text, aLength, items.Length(), nullptr, nullptr,
items.Elements(), &outItems);
if (result == E_OUTOFMEMORY) {
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
items.AppendElements(items.Length());
}
} 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;
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
sla.AppendElements(endOffset - startOffset);
if (ScriptBreak(text + startOffset, endOffset - startOffset,
&items[iItem].a, sla.Elements()) < 0)
return;
// We don't want to set a potential break position at the start of text;
// that's the responsibility of a higher level.
for (uint32_t j = startOffset ? 0 : 1; j + startOffset < endOffset; ++j) {
aBreakBefore[j + startOffset] = sla[j].fSoftBreak;
}
}
}
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