gecko-dev/htmlparser/robot/nsRobotSink.cpp

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/* -*- 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 "nsIRobotSink.h"
#include "nsIRobotSinkObserver.h"
#include "nsIParserNode.h"
#include "nsIParser.h"
#include "nsString.h"
#include "nsIURL.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsIIOService.h"
static NS_DEFINE_CID(kIOServiceCID, NS_IOSERVICE_CID);
#include "nsCRT.h"
#include "nsVoidArray.h"
class nsIDocument;
// TODO
// - add in base tag support
// - get links from other sources:
// - LINK tag
// - STYLE SRC
// - IMG SRC
// - LAYER SRC
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIHTMLContentSinkIID, NS_IHTML_CONTENT_SINK_IID);
static NS_DEFINE_IID(kIRobotSinkIID, NS_IROBOTSINK_IID);
class RobotSink : public nsIRobotSink {
public:
RobotSink();
virtual ~RobotSink();
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
// nsISupports
NS_DECL_ISUPPORTS
// nsIHTMLContentSink
NS_IMETHOD SetTitle(const nsString& aValue);
NS_IMETHOD OpenHTML(const nsIParserNode& aNode);
NS_IMETHOD CloseHTML(const nsIParserNode& aNode);
NS_IMETHOD OpenHead(const nsIParserNode& aNode);
NS_IMETHOD CloseHead(const nsIParserNode& aNode);
NS_IMETHOD OpenBody(const nsIParserNode& aNode);
NS_IMETHOD CloseBody(const nsIParserNode& aNode);
NS_IMETHOD OpenForm(const nsIParserNode& aNode);
NS_IMETHOD CloseForm(const nsIParserNode& aNode);
NS_IMETHOD OpenMap(const nsIParserNode& aNode);
NS_IMETHOD CloseMap(const nsIParserNode& aNode);
NS_IMETHOD OpenFrameset(const nsIParserNode& aNode);
NS_IMETHOD CloseFrameset(const nsIParserNode& aNode);
NS_IMETHOD OpenContainer(const nsIParserNode& aNode);
NS_IMETHOD CloseContainer(const nsIParserNode& aNode);
NS_IMETHOD NotifyError(const nsParserError* aError);
NS_IMETHOD CloseTopmostContainer();
NS_IMETHOD AddLeaf(const nsIParserNode& aNode);
NS_IMETHOD AddComment(const nsIParserNode& aNode);
NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode);
NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode, PRInt32 aMode=0);
NS_IMETHOD WillBuildModel(void) { return NS_OK; }
NS_IMETHOD DidBuildModel(PRInt32 aQualityLevel) { return NS_OK; }
NS_IMETHOD WillInterrupt(void) { return NS_OK; }
NS_IMETHOD WillResume(void) { return NS_OK; }
NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
NS_IMETHOD DoFragment(PRBool aFlag);
NS_IMETHOD BeginContext(PRInt32 aPosition){ return NS_OK; }
NS_IMETHOD EndContext(PRInt32 aPosition){ return NS_OK; }
// nsIRobotSink
NS_IMETHOD Init(nsIURI* aDocumentURL);
NS_IMETHOD AddObserver(nsIRobotSinkObserver* aObserver);
NS_IMETHOD RemoveObserver(nsIRobotSinkObserver* aObserver);
void ProcessLink(const nsString& aLink);
protected:
nsIURI* mDocumentURL;
nsVoidArray mObservers;
};
nsresult NS_NewRobotSink(nsIRobotSink** aInstancePtrResult)
{
RobotSink* it = new RobotSink();
if(it)
return it->QueryInterface(kIRobotSinkIID, (void**) aInstancePtrResult);
return NS_OK;
}
RobotSink::RobotSink()
{
}
RobotSink::~RobotSink()
{
NS_IF_RELEASE(mDocumentURL);
PRInt32 i, n = mObservers.Count();
for (i = 0; i < n; i++) {
nsIRobotSinkObserver* cop = (nsIRobotSinkObserver*)mObservers.ElementAt(i);
NS_RELEASE(cop);
}
}
NS_IMPL_ADDREF(RobotSink);
NS_IMPL_RELEASE(RobotSink);
NS_IMETHODIMP RobotSink::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kIRobotSinkIID)) {
*aInstancePtr = (void*) this;
AddRef();
return NS_OK;
}
if (aIID.Equals(kIHTMLContentSinkIID)) {
*aInstancePtr = (void*) this;
AddRef();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtr = (void*) ((nsISupports*)this);
AddRef();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP RobotSink::SetTitle(const nsString& aValue)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenHTML(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseHTML(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenHead(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseHead(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenBody(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseBody(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenForm(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseForm(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenMap(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseMap(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenFrameset(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseFrameset(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenContainer(const nsIParserNode& aNode)
{
nsAutoString tmp(aNode.GetText());
tmp.ToLowerCase();
if (tmp.Equals("a")) {
nsAutoString k, v;
PRInt32 ac = aNode.GetAttributeCount();
for (PRInt32 i = 0; i < ac; i++) {
// Get upper-cased key
const nsString& key = aNode.GetKeyAt(i);
k.Truncate();
k.Append(key);
k.ToLowerCase();
if (k.Equals("href")) {
// Get value and remove mandatory quotes
v.Truncate();
v.Append(aNode.GetValueAt(i));
PRUnichar first = v.First();
if ((first == '"') || (first == '\'')) {
if (v.Last() == first) {
v.Cut(0, 1);
PRInt32 pos = v.Length() - 1;
if (pos >= 0) {
v.Cut(pos, 1);
}
} else {
// Mismatched quotes - leave them in
}
}
ProcessLink(v);
}
}
}
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseContainer(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseTopmostContainer()
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::AddLeaf(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::NotifyError(const nsParserError* aError)
{
return NS_OK;
}
/**
* This gets called by the parsing system when we find a comment
* @update gess11/9/98
* @param aNode contains a comment token
* @return error code
*/
NS_IMETHODIMP RobotSink::AddComment(const nsIParserNode& aNode) {
nsresult result= NS_OK;
return result;
}
/**
* This gets called by the parsing system when we find a PI
* @update gess11/9/98
* @param aNode contains a comment token
* @return error code
*/
NS_IMETHODIMP RobotSink::AddProcessingInstruction(const nsIParserNode& aNode) {
nsresult result= NS_OK;
return result;
}
/**
* This gets called by the parser when it encounters
* a DOCTYPE declaration in the HTML document.
*/
NS_IMETHODIMP
RobotSink::AddDocTypeDecl(const nsIParserNode& aNode, PRInt32 aMode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::Init(nsIURI* aDocumentURL)
{
NS_IF_RELEASE(mDocumentURL);
mDocumentURL = aDocumentURL;
NS_IF_ADDREF(aDocumentURL);
return NS_OK;
}
NS_IMETHODIMP RobotSink::AddObserver(nsIRobotSinkObserver* aObserver)
{
if (mObservers.AppendElement(aObserver)) {
NS_ADDREF(aObserver);
return NS_OK;
}
return NS_ERROR_OUT_OF_MEMORY;
}
NS_IMETHODIMP RobotSink::RemoveObserver(nsIRobotSinkObserver* aObserver)
{
if (mObservers.RemoveElement(aObserver)) {
NS_RELEASE(aObserver);
return NS_OK;
}
//XXX return NS_ERROR_NOT_FOUND;
return NS_OK;
}
void RobotSink::ProcessLink(const nsString& aLink)
{
nsAutoString absURLSpec(aLink);
// Make link absolute
// XXX base tag handling
nsIURI* docURL = mDocumentURL;
if (nsnull != docURL) {
nsIURI* absurl;
nsresult rv;
NS_WITH_SERVICE(nsIIOService, service, kIOServiceCID, &rv);
if (NS_FAILED(rv)) return;
nsIURI *uri = nsnull, *baseUri = nsnull;
rv = mDocumentURL->QueryInterface(nsIURI::GetIID(), (void**)&baseUri);
if (NS_FAILED(rv)) return;
char *uriStr = aLink.ToNewCString();
if (!uriStr) return;
rv = service->NewURI(uriStr, baseUri, &uri);
nsCRT::free(uriStr);
NS_RELEASE(baseUri);
if (NS_FAILED(rv)) return;
rv = uri->QueryInterface(nsIURI::GetIID(), (void**)&absurl);
NS_RELEASE(uri);
if (NS_OK == rv) {
absURLSpec.Truncate();
char* str;
absurl->GetSpec(&str);
absURLSpec = str;
nsCRT::free(str);
}
}
// Now give link to robot observers
PRInt32 i, n = mObservers.Count();
for (i = 0; i < n; i++) {
nsIRobotSinkObserver* cop = (nsIRobotSinkObserver*)mObservers.ElementAt(i);
cop->ProcessLink(absURLSpec);
}
}
NS_IMETHODIMP
RobotSink::DoFragment(PRBool aFlag)
{
return NS_OK;
}