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77 lines
2.2 KiB
C++
77 lines
2.2 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 "nsSemanticUnitScanner.h"
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NS_IMPL_ISUPPORTS_INHERITED(nsSemanticUnitScanner, nsSampleWordBreaker, nsISemanticUnitScanner)
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nsSemanticUnitScanner::nsSemanticUnitScanner() : nsSampleWordBreaker()
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{
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/* member initializers and constructor code */
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}
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nsSemanticUnitScanner::~nsSemanticUnitScanner()
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{
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/* destructor code */
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}
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NS_IMETHODIMP nsSemanticUnitScanner::Start(const char *characterSet)
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{
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// do nothing for now.
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return NS_OK;
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}
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NS_IMETHODIMP nsSemanticUnitScanner::Next(const char16_t *text, int32_t length, int32_t pos, bool isLastBuffer, int32_t *begin, int32_t *end, bool *_retval)
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{
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// xxx need to bullet proff and check input pointer
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// make sure begin, end and _retval is not nullptr here
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// if we reach the end, just return
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if (pos >= length) {
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*begin = pos;
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*end = pos;
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*_retval = false;
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return NS_OK;
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}
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uint8_t char_class = nsSampleWordBreaker::GetClass(text[pos]);
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// if we are in chinese mode, return one han letter at a time
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// we should not do this if we are in Japanese or Korean mode
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if (kWbClassHanLetter == char_class) {
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*begin = pos;
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*end = pos+1;
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*_retval = true;
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return NS_OK;
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}
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int32_t next;
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// find the next "word"
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next = NextWord(text, (uint32_t) length, (uint32_t) pos);
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// if we don't have enough text to make decision, return
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if (next == NS_WORDBREAKER_NEED_MORE_TEXT) {
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*begin = pos;
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*end = isLastBuffer ? length : pos;
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*_retval = isLastBuffer;
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return NS_OK;
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}
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// if what we got is space or punct, look at the next break
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if ((char_class == kWbClassSpace) || (char_class == kWbClassPunct)) {
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// if the next "word" is not letters,
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// call itself recursively with the new pos
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return Next(text, length, next, isLastBuffer, begin, end, _retval);
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}
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// for the rest, return
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*begin = pos;
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*end = next;
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*_retval = true;
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return NS_OK;
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}
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