pjs/editor/libeditor/html/nsHTMLURIRefObject.cpp

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C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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
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*
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* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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/* Here is the list, from beppe and glazman:
href >> A, AREA, BASE, LINK
src >> FRAME, IFRAME, IMG, INPUT, SCRIPT
<META http-equiv="refresh" content="3,http://www.acme.com/intro.html">
longdesc >> FRAME, IFRAME, IMG
usemap >> IMG, INPUT, OBJECT
action >> FORM
background >> BODY
codebase >> OBJECT, APPLET
classid >> OBJECT
data >> OBJECT
cite >> BLOCKQUOTE, DEL, INS, Q
profile >> HEAD
ARCHIVE attribute on APPLET ; warning, it contains a list of URIs.
Easier way of organizing the list:
a: href
area: href
base: href
body: background
blockquote: cite (not normally rewritable)
link: href
frame: src, longdesc
iframe: src, longdesc
input: src, usemap
form: action
img: src, longdesc, usemap
script: src
applet: codebase, archive <list>
object: codebase, data, classid, usemap
head: profile
del: cite
ins: cite
q: cite
*/
/* Here is how to open a channel for testing
(from embed/qa/testembed/Tests.cpp):
nsCOMPtr<nsIChannel> theChannel;
nsCString uri;
nsCOMPtr<nsIURI> theURI;
rv = NS_NewURI(getter_AddRefs(theURI), theSpec);
if (!theURI)
error;
rv = NS_OpenURI(getter_AddRefs(theChannel), theURI, nsnull, theLoadGroup);
if (!theChannel)
error;
nsCOMPtr<nsILoadGroup> theLoadGroup(do_CreateInstance(NS_LOADGROUP_CONTRACTID));
if (!theLoadGroup)
error;
nsCOMPtr<nsIStreamListener> listener(static_cast<nsIStreamListener*>(qaBrowserImpl));
//nsCOMPtr<nsIWeakReference> thisListener(do_GetWeakReference(listener));
//qaWebBrowser->AddWebBrowserListener(thisListener, NS_GET_IID(nsIStreamListener));
// this calls nsIStreamListener::OnDataAvailable()
rv = theChannel->AsyncOpen(listener, nsnull);
nsCOMPtr<nsIRequest> theRequest = do_QueryInterface(theChannel);
// Now we can do things on nsIRequest (like what?)
*/
#include "nsHTMLURIRefObject.h"
#include "nsAString.h"
#include "nsString.h"
#include "nsIDOMAttr.h"
#include "nsIDOMElement.h"
// String classes change too often and I can't keep up.
// Set this macro to this week's approved case-insensitive compare routine.
#define MATCHES(tagName, str) tagName.EqualsIgnoreCase(str)
nsHTMLURIRefObject::nsHTMLURIRefObject()
{
mCurAttrIndex = mAttributeCnt = 0;
}
nsHTMLURIRefObject::~nsHTMLURIRefObject()
{
}
//Interfaces for addref and release and queryinterface
NS_IMPL_ISUPPORTS1(nsHTMLURIRefObject, nsIURIRefObject)
NS_IMETHODIMP
nsHTMLURIRefObject::Reset()
{
mCurAttrIndex = 0;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLURIRefObject::GetNextURI(nsAString & aURI)
{
NS_ENSURE_TRUE(mNode, NS_ERROR_NOT_INITIALIZED);
nsAutoString tagName;
nsresult rv = mNode->GetNodeName(tagName);
NS_ENSURE_SUCCESS(rv, rv);
// Loop over attribute list:
if (!mAttributes)
{
nsCOMPtr<nsIDOMElement> element (do_QueryInterface(mNode));
NS_ENSURE_TRUE(element, NS_ERROR_INVALID_ARG);
mCurAttrIndex = 0;
mNode->GetAttributes(getter_AddRefs(mAttributes));
NS_ENSURE_TRUE(mAttributes, NS_ERROR_NOT_INITIALIZED);
rv = mAttributes->GetLength(&mAttributeCnt);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(mAttributeCnt, NS_ERROR_FAILURE);
mCurAttrIndex = 0;
}
#ifdef DEBUG_akkana
printf("Looking at tag '%s'\n",
NS_LossyConvertUTF16toASCII(tagName).get());
#endif
while (mCurAttrIndex < mAttributeCnt)
{
nsCOMPtr<nsIDOMNode> attrNode;
rv = mAttributes->Item(mCurAttrIndex++, getter_AddRefs(attrNode));
// XXX Does Item() addref, or not?
// The comparable code in nsEditor assumes it doesn't.
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_ARG_POINTER(attrNode);
nsCOMPtr<nsIDOMAttr> curAttrNode (do_QueryInterface(attrNode));
NS_ENSURE_ARG_POINTER(curAttrNode);
nsString curAttr;
rv = curAttrNode->GetName(curAttr);
NS_ENSURE_SUCCESS(rv, rv);
// href >> A, AREA, BASE, LINK
#ifdef DEBUG_akkana
printf("Trying to match attribute '%s'\n",
NS_LossyConvertUTF16toASCII(curAttr).get());
#endif
if (MATCHES(curAttr, "href"))
{
if (!MATCHES(tagName, "a") && !MATCHES(tagName, "area")
&& !MATCHES(tagName, "base") && !MATCHES(tagName, "link"))
continue;
rv = curAttrNode->GetValue(aURI);
NS_ENSURE_SUCCESS(rv, rv);
nsString uri (aURI);
// href pointing to a named anchor doesn't count
if (aURI.First() != PRUnichar('#'))
return NS_OK;
aURI.Truncate();
return NS_ERROR_INVALID_ARG;
}
// src >> FRAME, IFRAME, IMG, INPUT, SCRIPT
else if (MATCHES(curAttr, "src"))
{
if (!MATCHES(tagName, "img")
&& !MATCHES(tagName, "frame") && !MATCHES(tagName, "iframe")
&& !MATCHES(tagName, "input") && !MATCHES(tagName, "script"))
continue;
return curAttrNode->GetValue(aURI);
}
//<META http-equiv="refresh" content="3,http://www.acme.com/intro.html">
else if (MATCHES(curAttr, "content"))
{
if (!MATCHES(tagName, "meta"))
continue;
}
// longdesc >> FRAME, IFRAME, IMG
else if (MATCHES(curAttr, "longdesc"))
{
if (!MATCHES(tagName, "img")
&& !MATCHES(tagName, "frame") && !MATCHES(tagName, "iframe"))
continue;
}
// usemap >> IMG, INPUT, OBJECT
else if (MATCHES(curAttr, "usemap"))
{
if (!MATCHES(tagName, "img")
&& !MATCHES(tagName, "input") && !MATCHES(tagName, "object"))
continue;
}
// action >> FORM
else if (MATCHES(curAttr, "action"))
{
if (!MATCHES(tagName, "form"))
continue;
}
// background >> BODY
else if (MATCHES(curAttr, "background"))
{
if (!MATCHES(tagName, "body"))
continue;
}
// codebase >> OBJECT, APPLET
else if (MATCHES(curAttr, "codebase"))
{
if (!MATCHES(tagName, "meta"))
continue;
}
// classid >> OBJECT
else if (MATCHES(curAttr, "classid"))
{
if (!MATCHES(tagName, "object"))
continue;
}
// data >> OBJECT
else if (MATCHES(curAttr, "data"))
{
if (!MATCHES(tagName, "object"))
continue;
}
// cite >> BLOCKQUOTE, DEL, INS, Q
else if (MATCHES(curAttr, "cite"))
{
if (!MATCHES(tagName, "blockquote") && !MATCHES(tagName, "q")
&& !MATCHES(tagName, "del") && !MATCHES(tagName, "ins"))
continue;
}
// profile >> HEAD
else if (MATCHES(curAttr, "profile"))
{
if (!MATCHES(tagName, "head"))
continue;
}
// archive attribute on APPLET; warning, it contains a list of URIs.
else if (MATCHES(curAttr, "archive"))
{
if (!MATCHES(tagName, "applet"))
continue;
}
}
// Return a code to indicate that there are no more,
// to distinguish that case from real errors.
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsHTMLURIRefObject::RewriteAllURIs(const nsAString & aOldPat,
const nsAString & aNewPat,
PRBool aMakeRel)
{
#ifdef DEBUG_akkana
printf("Can't rewrite URIs yet\n");
#endif
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsHTMLURIRefObject::GetNode(nsIDOMNode** aNode)
{
NS_ENSURE_TRUE(mNode, NS_ERROR_NOT_INITIALIZED);
NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER);
*aNode = mNode.get();
NS_ADDREF(*aNode);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLURIRefObject::SetNode(nsIDOMNode *aNode)
{
mNode = aNode;
nsAutoString dummyURI;
if (NS_SUCCEEDED(GetNextURI(dummyURI)))
{
mCurAttrIndex = 0; // Reset so we'll get the first node next time
return NS_OK;
}
// If there weren't any URIs in the attributes,
// then don't accept this node.
mNode = 0;
return NS_ERROR_INVALID_ARG;
}
nsresult NS_NewHTMLURIRefObject(nsIURIRefObject** aResult, nsIDOMNode* aNode)
{
nsHTMLURIRefObject* refObject = new nsHTMLURIRefObject();
NS_ENSURE_TRUE(refObject, NS_ERROR_OUT_OF_MEMORY);
nsresult rv = refObject->SetNode(aNode);
if (NS_FAILED(rv)) {
*aResult = 0;
delete refObject;
return rv;
}
return refObject->QueryInterface(NS_GET_IID(nsIURIRefObject),
(void**)aResult);
}