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112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsSemanticUnitScanner.h"
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#include "prmem.h"
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NS_IMPL_ISUPPORTS1(nsSemanticUnitScanner, 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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/* void start (in string characterSet); */
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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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/* void next (in wstring text, in long length, in long pos, out boolean hasMoreUnits, out long begin, out long end); */
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NS_IMETHODIMP nsSemanticUnitScanner::Next(const PRUnichar *text, PRInt32 length, PRInt32 pos, PRBool isLastBuffer, PRInt32 *begin, PRInt32 *end, PRBool *_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 nsnull 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 = PR_FALSE;
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return NS_OK;
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}
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PRUint8 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 = PR_TRUE;
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return NS_OK;
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}
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PRInt32 next;
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// find the next "word"
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next = NextWord(text, (PRUint32) length, (PRUint32) 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 = PR_TRUE;
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return NS_OK;
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}
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