337 lines
8.2 KiB
C++
337 lines
8.2 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 Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* 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 "nsIDOMHTMLLinkElement.h"
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#include "nsIDOMLinkStyle.h"
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#include "nsIScriptObjectOwner.h"
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#include "nsIDOMEventReceiver.h"
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#include "nsIHTMLContent.h"
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#include "nsGenericHTMLElement.h"
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#include "nsILink.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLIIDs.h"
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#include "nsIStyleContext.h"
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#include "nsIMutableStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPresContext.h"
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#include "nsIDOMStyleSheet.h"
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#include "nsIStyleSheet.h"
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#include "nsIStyleSheetLinkingElement.h"
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#include "nsHTMLUtils.h"
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#include "nsIURL.h"
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class nsHTMLLinkElement : public nsGenericHTMLLeafElement,
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public nsIDOMHTMLLinkElement,
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public nsILink,
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public nsIStyleSheetLinkingElement,
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public nsIDOMLinkStyle
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{
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public:
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nsHTMLLinkElement();
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virtual ~nsHTMLLinkElement();
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// nsISupports
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NS_DECL_ISUPPORTS_INHERITED
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// nsIDOMNode
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NS_FORWARD_IDOMNODE_NO_CLONENODE(nsGenericHTMLLeafElement::)
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// nsIDOMElement
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NS_FORWARD_IDOMELEMENT(nsGenericHTMLLeafElement::)
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// nsIDOMHTMLElement
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NS_FORWARD_IDOMHTMLELEMENT(nsGenericHTMLLeafElement::)
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// nsIDOMHTMLLinkElement
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NS_DECL_IDOMHTMLLINKELEMENT
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// nsILink
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NS_IMETHOD GetLinkState(nsLinkState &aState);
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NS_IMETHOD SetLinkState(nsLinkState aState);
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NS_IMETHOD GetHrefCString(char* &aBuf);
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// nsIStyleSheetLinkingElement
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NS_IMETHOD SetStyleSheet(nsIStyleSheet* aStyleSheet);
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NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aStyleSheet);
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// nsIDOMLinkStyle
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NS_DECL_IDOMLINKSTYLE
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NS_IMETHOD HandleDOMEvent(nsIPresContext* aPresContext, nsEvent* aEvent,
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nsIDOMEvent** aDOMEvent, PRUint32 aFlags,
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nsEventStatus* aEventStatus);
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NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
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protected:
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nsIStyleSheet* mStyleSheet;
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// The cached visited state
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nsLinkState mLinkState;
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};
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nsresult
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NS_NewHTMLLinkElement(nsIHTMLContent** aInstancePtrResult,
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nsINodeInfo *aNodeInfo)
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{
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NS_ENSURE_ARG_POINTER(aInstancePtrResult);
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nsHTMLLinkElement* it = new nsHTMLLinkElement();
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if (!it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsresult rv = it->Init(aNodeInfo);
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if (NS_FAILED(rv)) {
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delete it;
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return rv;
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}
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*aInstancePtrResult = NS_STATIC_CAST(nsIHTMLContent *, it);
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NS_ADDREF(*aInstancePtrResult);
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return NS_OK;
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}
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nsHTMLLinkElement::nsHTMLLinkElement()
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: mLinkState(eLinkState_Unknown)
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{
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mStyleSheet = nsnull;
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nsHTMLUtils::AddRef(); // for GetHrefCString
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}
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nsHTMLLinkElement::~nsHTMLLinkElement()
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{
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NS_IF_RELEASE(mStyleSheet);
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nsHTMLUtils::Release(); // for GetHrefCString
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}
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NS_IMPL_ADDREF_INHERITED(nsHTMLLinkElement, nsGenericElement)
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NS_IMPL_RELEASE_INHERITED(nsHTMLLinkElement, nsGenericElement)
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NS_IMPL_HTMLCONTENT_QI3(nsHTMLLinkElement, nsGenericHTMLLeafElement,
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nsIDOMHTMLLinkElement, nsIDOMLinkStyle,
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nsIStyleSheetLinkingElement);
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nsresult
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nsHTMLLinkElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
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{
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NS_ENSURE_ARG_POINTER(aReturn);
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*aReturn = nsnull;
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nsHTMLLinkElement* it = new nsHTMLLinkElement();
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if (!it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsCOMPtr<nsIDOMNode> kungFuDeathGrip(it);
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nsresult rv = it->Init(mNodeInfo);
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if (NS_FAILED(rv))
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return rv;
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CopyInnerTo(this, it, aDeep);
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*aReturn = NS_STATIC_CAST(nsIDOMNode *, it);
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NS_ADDREF(*aReturn);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::GetDisabled(PRBool* aDisabled)
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{
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nsCOMPtr<nsIDOMStyleSheet> ss(do_QueryInterface(mStyleSheet));
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nsresult result = NS_OK;
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if (ss) {
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result = ss->GetDisabled(aDisabled);
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} else {
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*aDisabled = PR_FALSE;
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}
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return result;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::SetDisabled(PRBool aDisabled)
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{
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nsCOMPtr<nsIDOMStyleSheet> ss(do_QueryInterface(mStyleSheet));
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nsresult result = NS_OK;
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if (ss) {
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result = ss->SetDisabled(aDisabled);
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}
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return result;
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}
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Charset, charset)
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Hreflang, hreflang)
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Media, media)
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Rel, rel)
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Rev, rev)
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Target, target)
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NS_IMPL_STRING_ATTR(nsHTMLLinkElement, Type, type)
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NS_IMETHODIMP
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nsHTMLLinkElement::GetHref(nsAWritableString& aValue)
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{
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char *buf;
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nsresult rv = GetHrefCString(buf);
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if (NS_FAILED(rv)) return rv;
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if (buf) {
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aValue.Assign(NS_ConvertASCIItoUCS2(buf));
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nsCRT::free(buf);
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}
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// NS_IMPL_STRING_ATTR does nothing where we have (buf == null)
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::SetHref(const nsAReadableString& aValue)
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{
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// Clobber our "cache", so we'll recompute it the next time
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// somebody asks for it.
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mLinkState = eLinkState_Unknown;
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return nsGenericHTMLLeafElement::SetAttribute(kNameSpaceID_HTML,
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nsHTMLAtoms::href, aValue,
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PR_TRUE);
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::SetStyleSheet(nsIStyleSheet* aStyleSheet)
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{
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NS_IF_RELEASE(mStyleSheet);
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mStyleSheet = aStyleSheet;
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NS_IF_ADDREF(mStyleSheet);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::GetStyleSheet(nsIStyleSheet*& aStyleSheet)
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{
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aStyleSheet = mStyleSheet;
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NS_IF_ADDREF(aStyleSheet);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::HandleDOMEvent(nsIPresContext* aPresContext,
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nsEvent* aEvent,
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nsIDOMEvent** aDOMEvent,
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PRUint32 aFlags,
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nsEventStatus* aEventStatus)
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{
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return HandleDOMEventForAnchors(this, aPresContext, aEvent, aDOMEvent,
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aFlags, aEventStatus);
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const
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{
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*aResult = sizeof(*this) + BaseSizeOf(aSizer);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::GetLinkState(nsLinkState &aState)
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{
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aState = mLinkState;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::SetLinkState(nsLinkState aState)
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{
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mLinkState = aState;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLinkElement::GetHrefCString(char* &aBuf)
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{
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// Get href= attribute (relative URL).
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nsAutoString relURLSpec;
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if (NS_CONTENT_ATTR_HAS_VALUE ==
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nsGenericHTMLLeafElement::GetAttribute(kNameSpaceID_HTML,
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nsHTMLAtoms::href, relURLSpec)) {
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// Clean up any leading or trailing whitespace
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relURLSpec.Trim(" \t\n\r");
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// Get base URL.
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nsCOMPtr<nsIURI> baseURL;
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GetBaseURL(*getter_AddRefs(baseURL));
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if (baseURL) {
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// Get absolute URL.
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NS_MakeAbsoluteURIWithCharset(&aBuf, relURLSpec, mDocument, baseURL,
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nsHTMLUtils::IOService,
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nsHTMLUtils::CharsetMgr);
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}
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else {
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// Absolute URL is same as relative URL.
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aBuf = relURLSpec.ToNewUTF8String();
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}
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}
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else {
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// Absolute URL is empty because we have no HREF.
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aBuf = nsnull;
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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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nsHTMLLinkElement::GetSheet(nsIDOMStyleSheet** aSheet)
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{
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NS_ENSURE_ARG_POINTER(aSheet);
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*aSheet = 0;
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if (mStyleSheet)
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mStyleSheet->QueryInterface(NS_GET_IID(nsIDOMStyleSheet), (void **)aSheet);
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// Always return NS_OK to avoid throwing JS exceptions if mStyleSheet
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// is not a nsIDOMStyleSheet
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return NS_OK;
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}
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