зеркало из https://github.com/mozilla/pjs.git
134 строки
4.6 KiB
C++
134 строки
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (the "License"); you may not use this file except in
|
|
* compliance with the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "nsWrapUtils.h"
|
|
|
|
#include "nsCOMPtr.h"
|
|
|
|
// Line breaker stuff
|
|
#include "nsIServiceManager.h"
|
|
#include "nsILineBreakerFactory.h"
|
|
#include "nsLWBrkCIID.h"
|
|
|
|
/*
|
|
* Rewrap the given section of string, putting the result in aOutString.
|
|
*/
|
|
nsresult
|
|
nsWrapUtils::Rewrap(const nsAString& aInString,
|
|
PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
|
|
PRBool aRespectNewlines,
|
|
const nsAString &aLineStartStr,
|
|
nsAString& aOutString)
|
|
{
|
|
PRInt32 i;
|
|
|
|
nsCOMPtr<nsILineBreaker> lineBreaker;
|
|
|
|
nsILineBreakerFactory *lf;
|
|
nsresult rv;
|
|
rv = nsServiceManager::GetService(NS_LWBRK_CONTRACTID,
|
|
NS_GET_IID(nsILineBreakerFactory),
|
|
(nsISupports **)&lf);
|
|
if (NS_SUCCEEDED(rv))
|
|
{
|
|
nsAutoString lbarg;
|
|
rv = lf->GetBreaker(lbarg, getter_AddRefs(lineBreaker));
|
|
nsServiceManager::ReleaseService(NS_LWBRK_CONTRACTID, lf);
|
|
}
|
|
|
|
aOutString.Truncate();
|
|
|
|
// Now we either have a line breaker, or we don't.
|
|
PRInt32 length = aInString.Length();
|
|
nsString tString(aInString);
|
|
const PRUnichar* unicodeStr = tString.get();
|
|
for (i = 0; i < length; ) // loop over lines
|
|
{
|
|
nsAutoString remaining(unicodeStr + i, length - i);
|
|
|
|
// If there's a first-line offset, that means we're not starting
|
|
// at the beginning of the line, so don't add a cite string there:
|
|
if (!aFirstLineOffset)
|
|
aOutString.Append(aLineStartStr);
|
|
|
|
PRInt32 eol = i + aWrapCol - aFirstLineOffset;
|
|
if (eol > length)
|
|
{
|
|
aOutString.Append(unicodeStr + i, length - i);
|
|
aOutString.Append(PRUnichar('\n')); // DOM line breaks, not NS_LINEBREAK
|
|
break;
|
|
}
|
|
if (i > 0) aFirstLineOffset = 0;
|
|
// eol is the prospective end of line ...
|
|
// look backwards from there for a place to break.
|
|
PRUint32 breakPt;
|
|
PRBool needMore;
|
|
rv = NS_ERROR_BASE;
|
|
if (lineBreaker)
|
|
{
|
|
rv = lineBreaker->Prev(unicodeStr + i, length - i, eol - i,
|
|
&breakPt, &needMore);
|
|
if (NS_FAILED(rv) || needMore)
|
|
{
|
|
rv = lineBreaker->Next(unicodeStr + i, length - i, eol - i,
|
|
&breakPt, &needMore);
|
|
if (needMore) rv = NS_ERROR_BASE;
|
|
}
|
|
}
|
|
// If we get out here and rv is set, something went wrong with line breaker.
|
|
// Just break the line, hard.
|
|
// If rv is okay, then breakPt is the place to break.
|
|
if (NS_FAILED(rv))
|
|
{
|
|
#ifdef DEBUG_akkana
|
|
printf("nsILineBreaker not working -- breaking hard\n");
|
|
#endif
|
|
breakPt = eol+1;
|
|
}
|
|
else breakPt += i;
|
|
nsAutoString appending(unicodeStr + i, breakPt - i);
|
|
aOutString.Append(unicodeStr + i, breakPt - i);
|
|
aOutString.Append(PRUnichar('\n')); // DOM line breaks, not NS_LINEBREAK
|
|
|
|
i = breakPt;
|
|
} // continue looping over lines
|
|
|
|
return NS_OK;
|
|
}
|
|
|