зеркало из https://github.com/mozilla/pjs.git
189 строки
4.8 KiB
C++
189 строки
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "nsInternetCiter.h"
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#include "nsString.h"
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#include "nsWrapUtils.h"
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#include "nsCOMPtr.h"
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// Line breaker stuff
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#include "nsIServiceManager.h"
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#include "nsILineBreakerFactory.h"
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#include "nsLWBrkCIID.h"
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/** Mail citations using the Internet style: > This is a citation
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*/
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static NS_DEFINE_CID(kLWBrkCID, NS_LWBRK_CID);
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nsInternetCiter::nsInternetCiter()
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{
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NS_INIT_REFCNT();
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}
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nsInternetCiter::~nsInternetCiter()
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{
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}
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NS_IMPL_ADDREF(nsInternetCiter)
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NS_IMPL_RELEASE(nsInternetCiter)
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NS_IMETHODIMP
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nsInternetCiter::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (nsnull == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(NS_GET_IID(nsISupports)))
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{
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*aInstancePtr = (void*)this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(NS_GET_IID(nsICiter))) {
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*aInstancePtr = (void*)(nsICiter*)this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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NS_IMETHODIMP
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nsInternetCiter::GetCiteString(const nsString& aInString, nsString& aOutString)
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{
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PRUnichar newline ('\n'); // Not XP!
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PRUnichar cr('\r');
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PRInt32 i = 0;
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PRInt32 length = aInString.Length();
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aOutString.SetLength(0);
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PRUnichar uch = newline;
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// Strip trailing new lines which will otherwise turn up
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// as ugly quoted empty lines.
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while(length > 0 &&
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(aInString[length-1] == cr ||
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aInString[length-1] == newline))
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{
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--length;
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}
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// Loop over the string:
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while (i < length)
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{
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if (uch == newline)
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aOutString.AppendWithConversion("> ");
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uch = aInString[i++];
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aOutString += uch;
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}
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if (uch != newline)
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aOutString += newline;
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return NS_OK;
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}
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nsresult
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nsInternetCiter::StripCitesAndLinebreaks(const nsString& aInString,
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nsString& aOutString,
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PRBool aLinebreaksToo,
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PRInt32* aCiteLevel)
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{
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if (aCiteLevel)
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*aCiteLevel = 0;
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aOutString.SetLength(0);
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PRInt32 length = aInString.Length();
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PRInt32 i = 0;
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PRUnichar gt ('>');
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while (i < length) // loop over lines
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{
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// Clear out cites first, at the beginning of the line:
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PRInt32 thisLineCiteLevel = 0;
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while (aInString[i] == gt || nsCRT::IsAsciiSpace(aInString[i]))
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{
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if (aInString[i] == gt) ++thisLineCiteLevel;
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++i;
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}
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// Now copy characters until line end:
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PRInt32 nextNewline = aInString.FindCharInSet("\r\n", i);
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if (nextNewline > i)
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{
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while (i < nextNewline)
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aOutString.Append(aInString[i++]);
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if (aLinebreaksToo)
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aOutString.AppendWithConversion(' ');
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else
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aOutString.AppendWithConversion('\n'); // DOM linebreaks, not NS_LINEBREAK
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// Skip over any more consecutive linebreak-like characters:
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while (aOutString[i] == '\r' || aOutString[i] == '\n')
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++i;
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}
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else // no more newlines
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{
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while (i < length)
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aOutString.Append(aInString[i++]);
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}
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// Done with this line -- update cite level
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if (aCiteLevel && (thisLineCiteLevel > *aCiteLevel))
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*aCiteLevel = thisLineCiteLevel;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsInternetCiter::StripCites(const nsString& aInString, nsString& aOutString)
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{
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return StripCitesAndLinebreaks(aInString, aOutString, PR_FALSE, 0);
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}
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NS_IMETHODIMP
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nsInternetCiter::Rewrap(const nsString& aInString,
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PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
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PRBool aRespectNewlines,
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nsString& aOutString)
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{
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PRInt32 i;
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// First, clean up all the existing newlines/cite marks and save the cite level.
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nsAutoString inString;
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PRInt32 citeLevel;
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StripCitesAndLinebreaks(aInString, inString, !aRespectNewlines, &citeLevel);
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nsAutoString citeString;
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for (i=0; i<citeLevel; ++i)
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citeString.AppendWithConversion("> ");
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return nsWrapUtils::Rewrap(inString, aWrapCol, aFirstLineOffset,
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aRespectNewlines, citeString,
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aOutString);
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}
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