mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-09 19:35:51 +00:00
119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* 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 Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
#include "nsWrapUtils.h"
|
|
|
|
#include "nsCOMPtr.h"
|
|
|
|
// Line breaker stuff
|
|
#include "nsIServiceManager.h"
|
|
#include "nsILineBreakerFactory.h"
|
|
#include "nsLWBrkCIID.h"
|
|
|
|
static NS_DEFINE_CID(kLWBrkCID, NS_LWBRK_CID);
|
|
|
|
/*
|
|
* Rewrap the given section of string, putting the result in aOutString.
|
|
*/
|
|
nsresult
|
|
nsWrapUtils::Rewrap(const nsString& aInString,
|
|
PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
|
|
PRBool aRespectNewlines,
|
|
nsString aLineStartStr,
|
|
nsString& aOutString)
|
|
{
|
|
PRInt32 i;
|
|
|
|
nsCOMPtr<nsILineBreaker> lineBreaker;
|
|
|
|
nsILineBreakerFactory *lf;
|
|
nsresult rv = NS_OK;
|
|
rv = nsServiceManager::GetService(kLWBrkCID,
|
|
NS_GET_IID(nsILineBreakerFactory),
|
|
(nsISupports **)&lf);
|
|
if (NS_SUCCEEDED(rv))
|
|
{
|
|
nsAutoString lbarg;
|
|
rv = lf->GetBreaker(lbarg, getter_AddRefs(lineBreaker));
|
|
nsServiceManager::ReleaseService(kLWBrkCID, lf);
|
|
}
|
|
|
|
aOutString.SetLength(0);
|
|
|
|
// Now we either have a line breaker, or we don't.
|
|
PRInt32 length = aInString.Length();
|
|
const PRUnichar* unicodeStr = aInString.GetUnicode();
|
|
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.AppendWithConversion('\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.AppendWithConversion('\n'); // DOM line breaks, not NS_LINEBREAK
|
|
|
|
i = breakPt;
|
|
} // continue looping over lines
|
|
|
|
return NS_OK;
|
|
}
|
|
|