pjs/editor/base/nsInternetCiter.cpp

189 строки
4.8 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):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
#include "nsInternetCiter.h"
#include "nsString.h"
#include "nsWrapUtils.h"
#include "nsCOMPtr.h"
// Line breaker stuff
#include "nsIServiceManager.h"
#include "nsILineBreakerFactory.h"
#include "nsLWBrkCIID.h"
/** Mail citations using the Internet style: > This is a citation
*/
static NS_DEFINE_CID(kLWBrkCID, NS_LWBRK_CID);
nsInternetCiter::nsInternetCiter()
{
NS_INIT_REFCNT();
}
nsInternetCiter::~nsInternetCiter()
{
}
NS_IMPL_ADDREF(nsInternetCiter)
NS_IMPL_RELEASE(nsInternetCiter)
NS_IMETHODIMP
nsInternetCiter::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (nsnull == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(NS_GET_IID(nsISupports)))
{
*aInstancePtr = (void*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsICiter))) {
*aInstancePtr = (void*)(nsICiter*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
nsInternetCiter::GetCiteString(const nsString& aInString, nsString& aOutString)
{
PRUnichar newline ('\n'); // Not XP!
PRUnichar cr('\r');
PRInt32 i = 0;
PRInt32 length = aInString.Length();
aOutString.SetLength(0);
PRUnichar uch = newline;
// Strip trailing new lines which will otherwise turn up
// as ugly quoted empty lines.
while(length > 0 &&
(aInString[length-1] == cr ||
aInString[length-1] == newline))
{
--length;
}
// Loop over the string:
while (i < length)
{
if (uch == newline)
aOutString.AppendWithConversion("> ");
uch = aInString[i++];
aOutString += uch;
}
if (uch != newline)
aOutString += newline;
return NS_OK;
}
nsresult
nsInternetCiter::StripCitesAndLinebreaks(const nsString& aInString,
nsString& aOutString,
PRBool aLinebreaksToo,
PRInt32* aCiteLevel)
{
if (aCiteLevel)
*aCiteLevel = 0;
aOutString.SetLength(0);
PRInt32 length = aInString.Length();
PRInt32 i = 0;
PRUnichar gt ('>');
while (i < length) // loop over lines
{
// Clear out cites first, at the beginning of the line:
PRInt32 thisLineCiteLevel = 0;
while (aInString[i] == gt || nsCRT::IsAsciiSpace(aInString[i]))
{
if (aInString[i] == gt) ++thisLineCiteLevel;
++i;
}
// Now copy characters until line end:
PRInt32 nextNewline = aInString.FindCharInSet("\r\n", i);
if (nextNewline > i)
{
while (i < nextNewline)
aOutString.Append(aInString[i++]);
if (aLinebreaksToo)
aOutString.AppendWithConversion(' ');
else
aOutString.AppendWithConversion('\n'); // DOM linebreaks, not NS_LINEBREAK
// Skip over any more consecutive linebreak-like characters:
while (aOutString[i] == '\r' || aOutString[i] == '\n')
++i;
}
else // no more newlines
{
while (i < length)
aOutString.Append(aInString[i++]);
}
// Done with this line -- update cite level
if (aCiteLevel && (thisLineCiteLevel > *aCiteLevel))
*aCiteLevel = thisLineCiteLevel;
}
return NS_OK;
}
NS_IMETHODIMP
nsInternetCiter::StripCites(const nsString& aInString, nsString& aOutString)
{
return StripCitesAndLinebreaks(aInString, aOutString, PR_FALSE, 0);
}
NS_IMETHODIMP
nsInternetCiter::Rewrap(const nsString& aInString,
PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
PRBool aRespectNewlines,
nsString& aOutString)
{
PRInt32 i;
// First, clean up all the existing newlines/cite marks and save the cite level.
nsAutoString inString;
PRInt32 citeLevel;
StripCitesAndLinebreaks(aInString, inString, !aRespectNewlines, &citeLevel);
nsAutoString citeString;
for (i=0; i<citeLevel; ++i)
citeString.AppendWithConversion("> ");
return nsWrapUtils::Rewrap(inString, aWrapCol, aFirstLineOffset,
aRespectNewlines, citeString,
aOutString);
}