зеркало из https://github.com/mozilla/pjs.git
adding asynchronous text/plain to text/html stream conversion - NOT PART OF BUILD
This commit is contained in:
valeski%netscape.com
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374e79203e
Коммит
a9b894bc1c
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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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*/
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#include "nsTXTToHTMLConv.h"
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#include "nsNetUtil.h"
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#include "nsIStringStream.h"
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#define TOKEN_DELIMITERS "\t\r\n "
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// nsISupports methods
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NS_IMPL_THREADSAFE_ISUPPORTS3(nsTXTToHTMLConv,
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nsIStreamConverter,
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nsIStreamObserver,
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nsIStreamListener);
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// nsIStreamConverter methods
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NS_IMETHODIMP
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nsTXTToHTMLConv::Convert(nsIInputStream *aFromStream,
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const PRUnichar *aFromType, const PRUnichar *aToType,
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nsISupports *aCtxt, nsIInputStream * *_retval) {
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsTXTToHTMLConv::AsyncConvertData(const PRUnichar *aFromType,
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const PRUnichar *aToType,
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nsIStreamListener *aListener,
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nsISupports *aCtxt) {
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NS_ASSERTION(aListener, "null pointer");
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mListener = aListener;
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return NS_OK;
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}
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// nsIStreamObserver methods
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NS_IMETHODIMP
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nsTXTToHTMLConv::OnStartRequest(nsIChannel *aChannel, nsISupports *aContext) {
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mBuffer = "<html>\n";
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return mListener->OnStartRequest(aChannel, aContext);
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}
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NS_IMETHODIMP
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nsTXTToHTMLConv::OnStopRequest(nsIChannel *aChannel, nsISupports *aContext,
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nsresult aStatus, const PRUnichar *aMsg) {
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nsresult rv = NS_OK;
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if (mToken) {
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// we still have an outstanding token
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PRInt32 back = mBuffer.FindCharInSet(TOKEN_DELIMITERS);
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if (back == -1) back = mBuffer.Length();
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(void)CatHTML(0, mBuffer.Length());
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}
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mBuffer += "\n</html>";
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nsCOMPtr<nsIInputStream> inputData;
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nsCOMPtr<nsISupports> inputDataSup;
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rv = NS_NewStringInputStream(getter_AddRefs(inputDataSup), mBuffer);
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if (NS_FAILED(rv)) return rv;
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inputData = do_QueryInterface(inputDataSup);
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rv = mListener->OnDataAvailable(aChannel, aContext,
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inputData, 0, mBuffer.Length());
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if (NS_FAILED(rv)) return rv;
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return mListener->OnStopRequest(aChannel, aContext, aStatus, aMsg);
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}
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// nsIStreamListener method
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NS_IMETHODIMP
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nsTXTToHTMLConv::OnDataAvailable(nsIChannel *aChannel, nsISupports *aContext,
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nsIInputStream *aInStream,
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PRUint32 aOffset, PRUint32 aCount) {
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nsresult rv = NS_OK;
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nsString pushBuffer;
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PRUint32 amtRead = 0;
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char *buffer = (char*)nsAllocator::Alloc(aCount+1);
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if (!buffer) return NS_ERROR_OUT_OF_MEMORY;
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do {
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PRUint32 read = 0;
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rv = aInStream->Read(buffer, aCount-amtRead, &read);
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if (NS_FAILED(rv)) return rv;
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buffer[read] = '\0';
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mBuffer += buffer;
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amtRead += read;
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PRInt32 front = -1, back = -1, tokenLoc = -1, cursor = 0;
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while ( (tokenLoc = FindToken(cursor, &mToken)) > -1) {
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front = mBuffer.RFindCharInSet(TOKEN_DELIMITERS, tokenLoc);
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front++;
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back = mBuffer.FindCharInSet(TOKEN_DELIMITERS, tokenLoc);
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if (back == -1) {
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// didn't find an ending, buffer up.
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mBuffer.Left(pushBuffer, front);
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cursor = front;
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break;
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} else {
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// found the end of the token.
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cursor = CatHTML(front, back);
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}
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}
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PRInt32 end = mBuffer.RFind(TOKEN_DELIMITERS,
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PR_FALSE, mBuffer.Length());
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mBuffer.Left(pushBuffer, PR_MAX(cursor, end));
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mBuffer.Cut(0, PR_MAX(cursor, end));
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cursor = 0;
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if (!pushBuffer.IsEmpty()) {
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nsCOMPtr<nsIInputStream> inputData;
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nsCOMPtr<nsISupports> inputDataSup;
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rv = NS_NewStringInputStream(getter_AddRefs(inputDataSup), pushBuffer);
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if (NS_FAILED(rv)) {
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nsAllocator::Free(buffer);
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return rv;
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}
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inputData = do_QueryInterface(inputDataSup);
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rv = mListener->OnDataAvailable(aChannel, aContext,
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inputData, 0, pushBuffer.Length());
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if (NS_FAILED(rv)) {
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nsAllocator::Free(buffer);
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return rv;
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}
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}
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} while (amtRead < aCount);
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nsAllocator::Free(buffer);
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return rv;
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}
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// nsTXTToHTMLConv methods
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nsTXTToHTMLConv::nsTXTToHTMLConv() {
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NS_INIT_REFCNT();
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mToken = nsnull;
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}
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PRBool CleanupTokens(void *aElement, void *aData) {
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if (aElement) delete (convToken*)aElement;
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return PR_TRUE;
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}
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nsTXTToHTMLConv::~nsTXTToHTMLConv() {
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mTokens.EnumerateForwards((nsVoidArrayEnumFunc)CleanupTokens, nsnull);
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}
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nsresult
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nsTXTToHTMLConv::Init() {
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nsresult rv = NS_OK;
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// build up the list of tokens to handle
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convToken *token = new convToken;
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if (!token) return NS_ERROR_OUT_OF_MEMORY;
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token->prepend = PR_TRUE;
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token->token = "http://"; // XXX need to iterate through all protos
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mTokens.AppendElement(token);
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token = new convToken;
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if (!token) return NS_ERROR_OUT_OF_MEMORY;
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token->prepend = PR_TRUE;
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token->token = '@';
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token->modText = "mailto:";
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mTokens.AppendElement(token);
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return rv;
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}
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PRInt32
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nsTXTToHTMLConv::FindToken(PRInt32 cursor, convToken* *_retval) {
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PRInt32 loc = -1, firstToken = mBuffer.Length();
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PRInt8 token = -1;
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for (PRInt8 i=0; i < mTokens.Count(); i++) {
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loc = mBuffer.Find(((convToken*)mTokens[i])->token, PR_FALSE, cursor);
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if (loc != -1)
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if (loc < firstToken) {
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firstToken = loc;
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token = i;
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}
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}
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if (token != -1) {
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*_retval = (convToken*)mTokens[token];
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return firstToken;
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} else {
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return -1;
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}
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}
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PRInt32
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nsTXTToHTMLConv::CatHTML(PRInt32 front, PRInt32 back) {
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PRInt32 cursor = 0;
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if (!mToken->prepend) {
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// replace the entire token (from delimiter to delimiter)
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mBuffer.Cut(front, back);
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mBuffer.Insert(mToken->modText, front);
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} else {
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nsString linkText;
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// href is implied
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PRInt32 modLen = mToken->modText.Length();
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mBuffer.Mid(linkText, front, back-front);
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mBuffer.Insert("<a href=\"", front);
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cursor += front+9;
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if (modLen)
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mBuffer.Insert(mToken->modText, cursor);
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cursor += modLen-front+back;
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mBuffer.Insert("\">", cursor);
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cursor += 2;
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mBuffer.Insert(linkText, cursor);
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cursor += linkText.Length();
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mBuffer.Insert("</a>", cursor);
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cursor += 4;
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}
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mToken = nsnull; // indicates completeness
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return cursor;
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}
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nsresult
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NS_NewNSTXTToHTMLConv(nsTXTToHTMLConv** aTXTToHTMLConv)
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{
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NS_PRECONDITION(aTXTToHTMLConv != nsnull, "null ptr");
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if (!aTXTToHTMLConv)
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return NS_ERROR_NULL_POINTER;
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*aTXTToHTMLConv = new nsTXTToHTMLConv();
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if (!*aTXTToHTMLConv)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aTXTToHTMLConv);
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return (*aTXTToHTMLConv)->Init();
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}
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@ -0,0 +1,96 @@
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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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*/
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#ifndef ____nstxttohtmlconv___h___
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#define ____nstxttohtmlconv___h___
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#include "nsIStreamConverter.h"
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#include "nsCOMPtr.h"
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#include "nsVoidArray.h"
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#include "nsIFactory.h"
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#include "nsString.h"
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#define NS_NSTXTTOHTMLCONVERTER_CID \
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{ /* 9ef9fa14-1dd1-11b2-9d65-d72d6d1f025e */ \
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0x9ef9fa14, \
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0x1dd1, \
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0x11b2, \
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{0x9d, 0x65, 0xd7, 0x2d, 0x6d, 0x1f, 0x02, 0x5e} \
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}
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static NS_DEFINE_CID(kNSTXTTOHTMLCONVCID, NS_NSTXTTOHTMLCONVERTER_CID);
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// Internal representation of a "token"
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typedef struct convToken {
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nsString token; // the actual string (i.e. "http://")
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nsString modText; // replacement text or href prepend text.
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PRBool prepend; // flag indicating how the modText should be used.
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} convToken;
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class nsTXTToHTMLConv : public nsIStreamConverter {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSISTREAMCONVERTER
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NS_DECL_NSISTREAMOBSERVER
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NS_DECL_NSISTREAMLISTENER
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nsTXTToHTMLConv();
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virtual ~nsTXTToHTMLConv();
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nsresult Init();
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// For factory creation.
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static NS_METHOD
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Create(nsISupports *aOuter, REFNSIID aIID, void **aResult) {
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nsresult rv;
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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nsTXTToHTMLConv* _s = new nsTXTToHTMLConv();
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if (_s == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(_s);
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rv = _s->Init();
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if (NS_FAILED(rv)) {
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delete _s;
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return rv;
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}
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rv = _s->QueryInterface(aIID, aResult);
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NS_RELEASE(_s);
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return rv;
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}
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protected:
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// return the token and it's location in the underlying buffer.
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PRInt32 FindToken(PRInt32 cursor, convToken* *_retval);
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// return the cursor location after munging HTML into the
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// underlying buffer.
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PRInt32 CatHTML(PRInt32 front, PRInt32 back);
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nsCOMPtr<nsIStreamListener> mListener; // final listener (consumer)
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nsString mBuffer; // any carry over data
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nsVoidArray mTokens; // list of tokens to search for
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convToken *mToken; // current token (if any)
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};
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#endif // ____nstxttohtmlconv___h___
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