pjs/parser/htmlparser/robot/nsRobotSink.cpp

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C++
Исходник Обычный вид История

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
* 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.
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*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
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#include "nsIRobotSink.h"
#include "nsIRobotSinkObserver.h"
#include "nsIParserNode.h"
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#include "nsIParser.h"
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#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
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#include "nsIURL.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsIIOService.h"
#include "nsNetCID.h"
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#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_CID(kIOServiceCID, NS_IOSERVICE_CID);
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIHTMLContentSinkIID, NS_IHTML_CONTENT_SINK_IID);
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static NS_DEFINE_IID(kIRobotSinkIID, NS_IROBOTSINK_IID);
class RobotSink : public nsIRobotSink {
public:
RobotSink();
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virtual ~RobotSink();
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NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
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// nsISupports
NS_DECL_ISUPPORTS
// nsIHTMLContentSink
NS_IMETHOD SetTitle(const nsString& aValue);
NS_IMETHOD OpenHTML(const nsIParserNode& aNode);
NS_IMETHOD CloseHTML();
NS_IMETHOD OpenHead(const nsIParserNode& aNode);
NS_IMETHOD CloseHead();
NS_IMETHOD OpenBody(const nsIParserNode& aNode);
NS_IMETHOD CloseBody();
NS_IMETHOD OpenForm(const nsIParserNode& aNode);
NS_IMETHOD CloseForm();
NS_IMETHOD OpenMap(const nsIParserNode& aNode);
NS_IMETHOD CloseMap();
NS_IMETHOD OpenFrameset(const nsIParserNode& aNode);
NS_IMETHOD CloseFrameset();
NS_IMETHOD IsEnabled(PRInt32 aTag, PRBool* aReturn) { return NS_OK; }
NS_IMETHOD_(PRBool) IsFormOnStack() { return PR_FALSE; }
NS_IMETHOD OpenContainer(const nsIParserNode& aNode);
NS_IMETHOD CloseContainer(const nsHTMLTag aTag);
NS_IMETHOD CloseTopmostContainer();
NS_IMETHOD AddHeadContent(const nsIParserNode& aNode);
NS_IMETHOD AddLeaf(const nsIParserNode& aNode);
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NS_IMETHOD AddComment(const nsIParserNode& aNode);
NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode);
NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode);
NS_IMETHOD WillBuildModel(void) { return NS_OK; }
NS_IMETHOD DidBuildModel(void) { 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 FlushPendingNotifications() { return NS_OK; }
NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
NS_IMETHOD WillProcessTokens(void) { return NS_OK; }
NS_IMETHOD DidProcessTokens(void) { return NS_OK; }
NS_IMETHOD WillProcessAToken(void) { return NS_OK; }
NS_IMETHOD DidProcessAToken(void) { return NS_OK; }
NS_IMETHOD NotifyTagObservers(nsIParserNode* aNode) { return NS_OK; }
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NS_IMETHOD BeginContext(PRInt32 aPosition){ return NS_OK; }
NS_IMETHOD EndContext(PRInt32 aPosition){ return NS_OK; }
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// nsIRobotSink
NS_IMETHOD Init(nsIURI* aDocumentURL);
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NS_IMETHOD AddObserver(nsIRobotSinkObserver* aObserver);
NS_IMETHOD RemoveObserver(nsIRobotSinkObserver* aObserver);
void ProcessLink(const nsString& aLink);
protected:
nsIURI* mDocumentURL;
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nsVoidArray mObservers;
};
nsresult NS_NewRobotSink(nsIRobotSink** aInstancePtrResult)
{
RobotSink* it = new RobotSink();
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if(it)
return it->QueryInterface(kIRobotSinkIID, (void**) aInstancePtrResult);
return NS_OK;
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}
RobotSink::RobotSink()
{
}
RobotSink::~RobotSink()
{
NS_IF_RELEASE(mDocumentURL);
PRInt32 i, n = mObservers.Count();
for (i = 0; i < n; ++i) {
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nsIRobotSinkObserver* cop = (nsIRobotSinkObserver*)mObservers.ElementAt(i);
NS_RELEASE(cop);
}
}
NS_IMPL_ADDREF(RobotSink)
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NS_IMPL_RELEASE(RobotSink)
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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)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::OpenHTML(const nsIParserNode& aNode)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::CloseHTML()
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::OpenHead(const nsIParserNode& aNode)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::CloseHead()
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::OpenBody(const nsIParserNode& aNode)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::CloseBody()
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::OpenForm(const nsIParserNode& aNode)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::CloseForm()
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::OpenMap(const nsIParserNode& aNode)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::CloseMap()
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenFrameset(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::CloseFrameset()
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::OpenContainer(const nsIParserNode& aNode)
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{
nsAutoString tmp; tmp.Assign(aNode.GetText());
ToLowerCase(tmp);
if (tmp.Equals(NS_LITERAL_STRING("a"))) {
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nsAutoString k, v;
PRInt32 ac = aNode.GetAttributeCount();
for (PRInt32 i = 0; i < ac; ++i) {
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// Get upper-cased key
const nsAString& key = aNode.GetKeyAt(i);
k.Assign(key);
ToLowerCase(k);
if (k.Equals(NS_LITERAL_STRING("href"))) {
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// 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;
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}
NS_IMETHODIMP RobotSink::CloseContainer(const nsHTMLTag aTag)
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::CloseTopmostContainer()
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{
return NS_OK;
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}
NS_IMETHODIMP RobotSink::AddHeadContent(const nsIParserNode& aNode)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::AddLeaf(const nsIParserNode& aNode)
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{
return NS_OK;
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}
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/**
* 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)
{
return NS_OK;
}
NS_IMETHODIMP RobotSink::Init(nsIURI* aDocumentURL)
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{
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; absURLSpec.Assign(aLink);
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// Make link absolute
// XXX base tag handling
nsIURI* docURL = mDocumentURL;
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if (nsnull != docURL) {
nsIURI* absurl;
nsresult rv;
nsCOMPtr<nsIIOService> service(do_GetService(kIOServiceCID, &rv));
if (NS_FAILED(rv)) return;
nsIURI *uri = nsnull, *baseUri = nsnull;
rv = mDocumentURL->QueryInterface(NS_GET_IID(nsIURI), (void**)&baseUri);
if (NS_FAILED(rv)) return;
NS_ConvertUCS2toUTF8 uriStr(aLink);
rv = service->NewURI(uriStr, nsnull, baseUri, &uri);
NS_RELEASE(baseUri);
if (NS_FAILED(rv)) return;
rv = uri->QueryInterface(NS_GET_IID(nsIURI), (void**)&absurl);
NS_RELEASE(uri);
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if (NS_OK == rv) {
absURLSpec.Truncate();
nsCAutoString str;
absurl->GetSpec(str);
absURLSpec = NS_ConvertUTF8toUCS2(str);
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}
}
// Now give link to robot observers
PRInt32 i, n = mObservers.Count();
for (i = 0; i < n; ++i) {
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nsIRobotSinkObserver* cop = (nsIRobotSinkObserver*)mObservers.ElementAt(i);
cop->ProcessLink(absURLSpec);
}
}