565 lines
18 KiB
C++
565 lines
18 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 License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* 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 Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsIDOMHTMLImageElement.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 "nsHTMLAtoms.h"
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#include "nsHTMLIIDs.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIHTMLAttributes.h"
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#include "nsIJSScriptObject.h"
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#include "nsIJSNativeInitializer.h"
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#include "nsSize.h"
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#include "nsIDocument.h"
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#include "nsIDOMWindow.h"
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#include "nsIDOMDocument.h"
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#include "nsIScriptContext.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIURL.h"
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// XXX nav attrs: suppress
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static NS_DEFINE_IID(kIDOMHTMLImageElementIID, NS_IDOMHTMLIMAGEELEMENT_IID);
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static NS_DEFINE_IID(kIJSNativeInitializerIID, NS_IJSNATIVEINITIALIZER_IID);
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static NS_DEFINE_IID(kIDOMWindowIID, NS_IDOMWINDOW_IID);
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static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
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class nsHTMLImageElement : public nsIDOMHTMLImageElement,
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public nsIScriptObjectOwner,
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public nsIDOMEventReceiver,
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public nsIHTMLContent,
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public nsIJSScriptObject,
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public nsIJSNativeInitializer
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{
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public:
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nsHTMLImageElement(nsIAtom* aTag);
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virtual ~nsHTMLImageElement();
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// nsISupports
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NS_DECL_ISUPPORTS
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// nsIDOMNode
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NS_IMPL_IDOMNODE_USING_GENERIC(mInner)
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// nsIDOMElement
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NS_IMPL_IDOMELEMENT_USING_GENERIC(mInner)
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// nsIDOMHTMLElement
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NS_IMPL_IDOMHTMLELEMENT_USING_GENERIC(mInner)
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// nsIDOMHTMLImageElement
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NS_IMETHOD GetLowSrc(nsString& aLowSrc);
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NS_IMETHOD SetLowSrc(const nsString& aLowSrc);
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NS_IMETHOD GetName(nsString& aName);
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NS_IMETHOD SetName(const nsString& aName);
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NS_IMETHOD GetAlign(nsString& aAlign);
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NS_IMETHOD SetAlign(const nsString& aAlign);
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NS_IMETHOD GetAlt(nsString& aAlt);
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NS_IMETHOD SetAlt(const nsString& aAlt);
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NS_IMETHOD GetBorder(nsString& aBorder);
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NS_IMETHOD SetBorder(const nsString& aBorder);
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NS_IMETHOD GetHeight(nsString& aHeight);
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NS_IMETHOD SetHeight(const nsString& aHeight);
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NS_IMETHOD GetHspace(nsString& aHspace);
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NS_IMETHOD SetHspace(const nsString& aHspace);
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NS_IMETHOD GetIsMap(PRBool* aIsMap);
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NS_IMETHOD SetIsMap(PRBool aIsMap);
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NS_IMETHOD GetLongDesc(nsString& aLongDesc);
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NS_IMETHOD SetLongDesc(const nsString& aLongDesc);
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NS_IMETHOD GetSrc(nsString& aSrc);
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NS_IMETHOD SetSrc(const nsString& aSrc);
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NS_IMETHOD GetUseMap(nsString& aUseMap);
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NS_IMETHOD SetUseMap(const nsString& aUseMap);
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NS_IMETHOD GetVspace(nsString& aVspace);
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NS_IMETHOD SetVspace(const nsString& aVspace);
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NS_IMETHOD GetWidth(nsString& aWidth);
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NS_IMETHOD SetWidth(const nsString& aWidth);
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// nsIScriptObjectOwner
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NS_IMPL_ISCRIPTOBJECTOWNER_USING_GENERIC(mInner)
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// nsIDOMEventReceiver
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NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC(mInner)
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// nsIContent
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NS_IMPL_ICONTENT_NO_SETDOCUMENT_USING_GENERIC(mInner)
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// nsIHTMLContent
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NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)
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// nsIJSScriptObject
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virtual PRBool AddProperty(JSContext *aContext, jsval aID, jsval *aVp);
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virtual PRBool DeleteProperty(JSContext *aContext, jsval aID, jsval *aVp);
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virtual PRBool GetProperty(JSContext *aContext, jsval aID, jsval *aVp);
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virtual PRBool SetProperty(JSContext *aContext, jsval aID, jsval *aVp);
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virtual PRBool EnumerateProperty(JSContext *aContext);
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virtual PRBool Resolve(JSContext *aContext, jsval aID);
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virtual PRBool Convert(JSContext *aContext, jsval aID);
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virtual void Finalize(JSContext *aContext);
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// nsIJSNativeInitializer
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NS_IMETHOD Initialize(JSContext* aContext, PRUint32 argc, jsval *argv);
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protected:
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nsGenericHTMLLeafElement mInner;
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nsIDocument* mOwnerDocument; // Only used if this is a script constructed image
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};
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nsresult
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NS_NewHTMLImageElement(nsIHTMLContent** aInstancePtrResult, nsIAtom* aTag)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIHTMLContent* it = new nsHTMLImageElement(aTag);
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
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}
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nsHTMLImageElement::nsHTMLImageElement(nsIAtom* aTag)
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{
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NS_INIT_REFCNT();
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mInner.Init(this, aTag);
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mOwnerDocument = nsnull;
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}
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nsHTMLImageElement::~nsHTMLImageElement()
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{
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NS_IF_RELEASE(mOwnerDocument);
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}
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NS_IMPL_ADDREF(nsHTMLImageElement)
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NS_IMPL_RELEASE(nsHTMLImageElement)
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nsresult
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nsHTMLImageElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (aIID.Equals(kIJSScriptObjectIID)) {
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nsIJSScriptObject* tmp = this;
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*aInstancePtr = (void*) tmp;
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AddRef();
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return NS_OK;
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}
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NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
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if (aIID.Equals(kIDOMHTMLImageElementIID)) {
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nsIDOMHTMLImageElement* tmp = this;
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*aInstancePtr = (void*) tmp;
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mRefCnt++;
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return NS_OK;
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}
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if (aIID.Equals(kIJSNativeInitializerIID)) {
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nsIJSNativeInitializer* tmp = this;
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*aInstancePtr = (void*) tmp;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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nsresult
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nsHTMLImageElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
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{
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nsHTMLImageElement* it = new nsHTMLImageElement(mInner.mTag);
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mInner.CopyInnerTo(this, &it->mInner, aDeep);
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return it->QueryInterface(kIDOMNodeIID, (void**) aReturn);
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}
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, LowSrc, lowsrc)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Name, name)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Align, align)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Alt, alt)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Border, border)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Height, height)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Hspace, hspace)
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NS_IMPL_BOOL_ATTR(nsHTMLImageElement, IsMap, ismap)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, LongDesc, longdesc)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, UseMap, usemap)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Vspace, vspace)
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NS_IMPL_STRING_ATTR(nsHTMLImageElement, Width, width)
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NS_IMETHODIMP
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nsHTMLImageElement::StringToAttribute(nsIAtom* aAttribute,
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const nsString& aValue,
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nsHTMLValue& aResult)
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{
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if (aAttribute == nsHTMLAtoms::align) {
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if (nsGenericHTMLElement::ParseAlignValue(aValue, aResult)) {
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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}
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else if (aAttribute == nsHTMLAtoms::ismap) {
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aResult.SetEmptyValue();
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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if ((aAttribute == nsHTMLAtoms::usemap) ||
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(aAttribute == nsHTMLAtoms::src) ||
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(aAttribute == nsHTMLAtoms::lowsrc)) {
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nsAutoString tmp(aValue);
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tmp.StripWhitespace();
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aResult.SetStringValue(tmp);
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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else if (nsGenericHTMLElement::ParseImageAttribute(aAttribute,
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aValue, aResult)) {
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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return NS_CONTENT_ATTR_NOT_THERE;
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}
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NS_IMETHODIMP
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nsHTMLImageElement::AttributeToString(nsIAtom* aAttribute,
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const nsHTMLValue& aValue,
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nsString& aResult) const
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{
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if (aAttribute == nsHTMLAtoms::align) {
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if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
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nsGenericHTMLElement::AlignValueToString(aValue, aResult);
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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}
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else if (nsGenericHTMLElement::ImageAttributeToString(aAttribute,
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aValue, aResult)) {
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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return mInner.AttributeToString(aAttribute, aValue, aResult);
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}
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static void
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MapAttributesInto(nsIHTMLAttributes* aAttributes,
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nsIStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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if (nsnull != aAttributes) {
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nsHTMLValue value;
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aAttributes->GetAttribute(nsHTMLAtoms::align, value);
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if (value.GetUnit() == eHTMLUnit_Enumerated) {
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PRUint8 align = value.GetIntValue();
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nsStyleDisplay* display = (nsStyleDisplay*)
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aContext->GetMutableStyleData(eStyleStruct_Display);
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nsStyleText* text = (nsStyleText*)
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aContext->GetMutableStyleData(eStyleStruct_Text);
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nsStyleSpacing* spacing = (nsStyleSpacing*)
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aContext->GetMutableStyleData(eStyleStruct_Spacing);
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float p2t;
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aPresContext->GetScaledPixelsToTwips(&p2t);
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nsStyleCoord three(NSIntPixelsToTwips(3, p2t));
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switch (align) {
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case NS_STYLE_TEXT_ALIGN_LEFT:
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display->mFloats = NS_STYLE_FLOAT_LEFT;
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// XXX This should end up in ua.css when we can support css2
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// attribute selectors (e.g. IMG.align[left])
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if (eStyleUnit_Auto >= spacing->mMargin.GetLeftUnit()) {
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spacing->mMargin.SetLeft(three);
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}
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if (eStyleUnit_Auto >= spacing->mMargin.GetRightUnit()) {
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spacing->mMargin.SetRight(three);
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}
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break;
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case NS_STYLE_TEXT_ALIGN_RIGHT:
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display->mFloats = NS_STYLE_FLOAT_RIGHT;
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// XXX This should end up in ua.css when we can support css2
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// attribute selectors (e.g. IMG.align[left])
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if (eStyleUnit_Auto >= spacing->mMargin.GetLeftUnit()) {
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spacing->mMargin.SetLeft(three);
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}
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if (eStyleUnit_Auto >= spacing->mMargin.GetRightUnit()) {
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spacing->mMargin.SetRight(three);
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}
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break;
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default:
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text->mVerticalAlign.SetIntValue(align, eStyleUnit_Enumerated);
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break;
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}
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}
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}
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nsGenericHTMLElement::MapImageAttributesInto(aAttributes, aContext, aPresContext);
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nsGenericHTMLElement::MapImageBorderAttributesInto(aAttributes, aContext, aPresContext, nsnull);
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nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
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}
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NS_IMETHODIMP
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nsHTMLImageElement::GetAttributeMappingFunctions(nsMapAttributesFunc& aFontMapFunc,
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nsMapAttributesFunc& aMapFunc) const
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{
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aFontMapFunc = nsnull;
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aMapFunc = &MapAttributesInto;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLImageElement::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 mInner.HandleDOMEvent(aPresContext, aEvent, aDOMEvent,
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aFlags, aEventStatus);
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}
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PRBool
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nsHTMLImageElement::AddProperty(JSContext *aContext, jsval aID, jsval *aVp)
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{
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return mInner.AddProperty(aContext, aID, aVp);
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}
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PRBool
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nsHTMLImageElement::DeleteProperty(JSContext *aContext, jsval aID, jsval *aVp)
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{
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return mInner.DeleteProperty(aContext, aID, aVp);
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}
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PRBool
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nsHTMLImageElement::GetProperty(JSContext *aContext, jsval aID, jsval *aVp)
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{
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return mInner.GetProperty(aContext, aID, aVp);
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}
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PRBool
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nsHTMLImageElement::SetProperty(JSContext *aContext, jsval aID, jsval *aVp)
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{
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return mInner.SetProperty(aContext, aID, aVp);
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}
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PRBool
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nsHTMLImageElement::EnumerateProperty(JSContext *aContext)
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{
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return mInner.EnumerateProperty(aContext);
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}
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PRBool
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nsHTMLImageElement::Resolve(JSContext *aContext, jsval aID)
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{
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return mInner.Resolve(aContext, aID);
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}
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PRBool
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nsHTMLImageElement::Convert(JSContext *aContext, jsval aID)
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{
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return mInner.Convert(aContext, aID);
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}
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void
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nsHTMLImageElement::Finalize(JSContext *aContext)
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{
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mInner.Finalize(aContext);
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}
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NS_IMETHODIMP
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nsHTMLImageElement::GetStyleHintForAttributeChange(
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const nsIAtom* aAttribute,
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PRInt32 *aHint) const
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{
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if (aAttribute == nsHTMLAtoms::src) {
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*aHint = NS_STYLE_HINT_CONTENT;
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}
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else if ((aAttribute == nsHTMLAtoms::usemap) ||
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(aAttribute == nsHTMLAtoms::ismap)) {
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*aHint = NS_STYLE_HINT_FRAMECHANGE;
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}
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else {
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nsGenericHTMLElement::GetStyleHintForCommonAttributes(this, aAttribute, aHint);
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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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nsHTMLImageElement::Initialize(JSContext* aContext,
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PRUint32 argc,
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jsval *argv)
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{
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nsresult result = NS_OK;
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// XXX This element is created unattached to any document. Later
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// on, it might be used to preload the image cache. For that, we
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// need a document (actually a pres context). The only way to get
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// one is to associate the image with one at creation time, through
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// the JSContext passed in. This mechanism is **UGLY** and makes
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// some hard assumptions about the relationship between JSContexts
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// and documents.
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nsIScriptContext* scriptContext;
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scriptContext = (nsIScriptContext*)JS_GetContextPrivate(aContext);
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if (nsnull != scriptContext) {
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nsIScriptGlobalObject* globalObject = scriptContext->GetGlobalObject();
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if (nsnull != globalObject) {
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nsIDOMWindow* domWindow;
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result = globalObject->QueryInterface(kIDOMWindowIID, (void**)&domWindow);
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if (NS_SUCCEEDED(result)) {
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nsIDOMDocument* domDocument;
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result = domWindow->GetDocument(&domDocument);
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if (NS_SUCCEEDED(result)) {
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// Maintain the reference
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result = domDocument->QueryInterface(kIDocumentIID,
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(void**)&mOwnerDocument);
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NS_RELEASE(domDocument);
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}
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NS_RELEASE(domWindow);
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}
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}
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}
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if (NS_SUCCEEDED(result) && (argc > 0)) {
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// The first (optional) argument is the width of the image
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int32 width;
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JSBool ret = JS_ValueToInt32(aContext, argv[0], &width);
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if (ret) {
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nsHTMLValue widthVal((PRInt32)width, eHTMLUnit_Integer);
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result = mInner.SetHTMLAttribute(nsHTMLAtoms::width,
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widthVal, PR_FALSE);
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if (NS_SUCCEEDED(result) && (argc > 1)) {
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// The second (optional) argument is the height of the image
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int32 height;
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ret = JS_ValueToInt32(aContext, argv[1], &height);
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if (ret) {
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nsHTMLValue heightVal((PRInt32)height, eHTMLUnit_Integer);
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result = mInner.SetHTMLAttribute(nsHTMLAtoms::height,
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heightVal, PR_FALSE);
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}
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else {
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result = NS_ERROR_INVALID_ARG;
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}
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}
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}
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else {
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result = NS_ERROR_INVALID_ARG;
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}
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}
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return result;
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}
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NS_IMETHODIMP
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nsHTMLImageElement::SetDocument(nsIDocument* aDocument,
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PRBool aDeep)
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{
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// If we've been added to the document, we can get rid of
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// our owner document reference so as to avoid a circular
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// reference.
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NS_IF_RELEASE(mOwnerDocument);
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return mInner.SetDocument(aDocument, aDeep);
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}
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NS_IMETHODIMP
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nsHTMLImageElement::GetSrc(nsString& aSrc)
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{
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mInner.GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, aSrc);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLImageElement::SetSrc(const nsString& aSrc)
|
|
{
|
|
nsresult result = NS_OK;
|
|
|
|
if (nsnull != mOwnerDocument) {
|
|
|
|
PRInt32 i, count = mOwnerDocument->GetNumberOfShells();
|
|
nsIPresShell* shell;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
shell = mOwnerDocument->GetShellAt(i);
|
|
if (nsnull != shell) {
|
|
nsIPresContext* context;
|
|
|
|
result = shell->GetPresContext(&context);
|
|
if (NS_SUCCEEDED(result)) {
|
|
nsSize size;
|
|
nsHTMLValue val;
|
|
float p2t;
|
|
|
|
context->GetScaledPixelsToTwips(&p2t);
|
|
result = mInner.GetHTMLAttribute(nsHTMLAtoms::width, val);
|
|
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
|
|
size.width = NSIntPixelsToTwips(val.GetIntValue(), p2t);
|
|
}
|
|
else {
|
|
size.width = 0;
|
|
}
|
|
result = mInner.GetHTMLAttribute(nsHTMLAtoms::height, val);
|
|
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
|
|
size.height = NSIntPixelsToTwips(val.GetIntValue(), p2t);
|
|
}
|
|
else {
|
|
size.height = 0;
|
|
}
|
|
|
|
nsAutoString url, empty;
|
|
nsIURL* baseURL;
|
|
|
|
empty.Truncate();
|
|
result = mOwnerDocument->GetBaseURL(baseURL);
|
|
if (NS_SUCCEEDED(result)) {
|
|
result = NS_MakeAbsoluteURL(baseURL, empty, aSrc, url);
|
|
if (NS_FAILED(result)) {
|
|
url = aSrc;
|
|
}
|
|
NS_RELEASE(baseURL);
|
|
}
|
|
else {
|
|
url = aSrc;
|
|
}
|
|
|
|
nsSize* specifiedSize = nsnull;
|
|
if ((size.width > 0) || (size.height > 0)) {
|
|
specifiedSize = &size;
|
|
}
|
|
|
|
// Start the image loading. We don't care about notification
|
|
// or holding on to the image loader.
|
|
result = context->StartLoadImage(url, nsnull, specifiedSize,
|
|
nsnull, nsnull, nsnull,
|
|
nsnull);
|
|
NS_RELEASE(context);
|
|
}
|
|
|
|
NS_RELEASE(shell);
|
|
}
|
|
}
|
|
|
|
// Only do this the first time since it's only there for
|
|
// backwards compatability
|
|
NS_RELEASE(mOwnerDocument);
|
|
}
|
|
|
|
if (NS_SUCCEEDED(result)) {
|
|
result = mInner.SetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, aSrc, PR_TRUE);
|
|
}
|
|
|
|
return result;
|
|
}
|