| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "SmallCapsIterator.h" |
| |
| #include "wtf/PtrUtil.h" |
| #include <unicode/utypes.h> |
| |
| namespace blink { |
| |
| SmallCapsIterator::SmallCapsIterator(const UChar* buffer, unsigned bufferSize) |
| : m_utf16Iterator(WTF::makeUnique<UTF16TextIterator>(buffer, bufferSize)), |
| m_bufferSize(bufferSize), |
| m_nextUChar32(0), |
| m_atEnd(bufferSize == 0), |
| m_currentSmallCapsBehavior(SmallCapsInvalid) {} |
| |
| bool SmallCapsIterator::consume(unsigned* capsLimit, |
| SmallCapsBehavior* smallCapsBehavior) { |
| if (m_atEnd) |
| return false; |
| |
| while (m_utf16Iterator->consume(m_nextUChar32)) { |
| m_previousSmallCapsBehavior = m_currentSmallCapsBehavior; |
| // Skipping over combining marks, as these combine with the small-caps |
| // uppercased text as well and we do not need to split by their |
| // individual case-ness. |
| if (!u_getCombiningClass(m_nextUChar32)) { |
| m_currentSmallCapsBehavior = |
| u_hasBinaryProperty(m_nextUChar32, UCHAR_CHANGES_WHEN_UPPERCASED) |
| ? SmallCapsUppercaseNeeded |
| : SmallCapsSameCase; |
| } |
| |
| if (m_previousSmallCapsBehavior != m_currentSmallCapsBehavior && |
| m_previousSmallCapsBehavior != SmallCapsInvalid) { |
| *capsLimit = m_utf16Iterator->offset(); |
| *smallCapsBehavior = m_previousSmallCapsBehavior; |
| return true; |
| } |
| m_utf16Iterator->advance(); |
| } |
| *capsLimit = m_bufferSize; |
| *smallCapsBehavior = m_currentSmallCapsBehavior; |
| m_atEnd = true; |
| return true; |
| } |
| |
| } // namespace blink |
