421 lines
13 KiB
C++
421 lines
13 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 "nsIDOMHTMLLabelElement.h"
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#include "nsIDOMHTMLFormElement.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 "nsIMutableStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPresContext.h"
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#include "nsIFormControl.h"
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#include "nsIForm.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDocument.h"
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#include "nsISizeOfHandler.h"
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#include "nsIFormControlFrame.h"
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#include "nsIPresShell.h"
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static NS_DEFINE_IID(kIDOMHTMLLabelElementIID, NS_IDOMHTMLLABELELEMENT_IID);
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static NS_DEFINE_IID(kIDOMHTMLFormElementIID, NS_IDOMHTMLFORMELEMENT_IID);
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static NS_DEFINE_IID(kIFormIID, NS_IFORM_IID);
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static NS_DEFINE_IID(kIFormControlIID, NS_IFORMCONTROL_IID);
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class nsHTMLLabelElement : public nsIDOMHTMLLabelElement,
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public nsIScriptObjectOwner,
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public nsIDOMEventReceiver,
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public nsIHTMLContent,
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public nsIFormControl
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{
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public:
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nsHTMLLabelElement(nsIAtom* aTag);
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virtual ~nsHTMLLabelElement();
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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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// nsIDOMHTMLLabelElement
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NS_IMETHOD GetForm(nsIDOMHTMLFormElement** aForm);
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NS_IMETHOD SetForm(nsIDOMHTMLFormElement* aForm);
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NS_IMETHOD GetAccessKey(nsString& aAccessKey);
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NS_IMETHOD SetAccessKey(const nsString& aAccessKey);
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NS_IMETHOD GetHtmlFor(nsString& aHtmlFor);
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NS_IMETHOD SetHtmlFor(const nsString& aHtmlFor);
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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_SETPARENT_NO_SETDOCUMENT_USING_GENERIC(mInner)
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// nsIHTMLContent
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NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)
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// nsIFormControl
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NS_IMETHOD GetType(PRInt32* aType) { return NS_FORM_LABEL; }
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NS_IMETHOD Init() { return NS_OK; }
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protected:
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nsGenericHTMLContainerElement mInner;
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nsIForm* mForm;
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};
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// construction, destruction
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nsresult
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NS_NewHTMLLabelElement(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 nsHTMLLabelElement(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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nsHTMLLabelElement::nsHTMLLabelElement(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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mForm = nsnull;
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}
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nsHTMLLabelElement::~nsHTMLLabelElement()
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{
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if (nsnull != mForm) {
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// prevent mForm from decrementing its ref count on us
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mForm->RemoveElement(this, PR_FALSE);
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NS_RELEASE(mForm);
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}
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}
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// nsISupports
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NS_IMPL_ADDREF(nsHTMLLabelElement)
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NS_IMETHODIMP_(nsrefcnt)
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nsHTMLLabelElement::Release()
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{
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--mRefCnt;
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if (mRefCnt <= 0) {
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delete this;
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return 0;
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} else if ((1 == mRefCnt) && mForm) {
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mRefCnt = 0;
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delete this;
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return 0;
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} else {
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return mRefCnt;
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}
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}
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nsresult
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nsHTMLLabelElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
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if (aIID.Equals(kIDOMHTMLLabelElementIID)) {
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*aInstancePtr = (void*)(nsIDOMHTMLLabelElement*)this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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else if (aIID.Equals(kIFormControlIID)) {
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*aInstancePtr = (void*)(nsIFormControl*) this;
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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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// nsIDOMHTMLLabelElement
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nsresult
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nsHTMLLabelElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
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{
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nsHTMLLabelElement* it = new nsHTMLLabelElement(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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// nsIContent
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NS_IMETHODIMP
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nsHTMLLabelElement::SetParent(nsIContent* aParent)
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{
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return mInner.SetParentForFormControls(aParent, this, mForm);
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}
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NS_IMETHODIMP
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nsHTMLLabelElement::SetDocument(nsIDocument* aDocument, PRBool aDeep)
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{
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return mInner.SetDocumentForFormControls(aDocument, aDeep, this, mForm);
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}
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NS_IMETHODIMP
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nsHTMLLabelElement::GetForm(nsIDOMHTMLFormElement** aForm)
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{
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nsresult result = NS_OK;
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*aForm = nsnull;
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if (nsnull != mForm) {
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nsIDOMHTMLFormElement* formElem = nsnull;
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result = mForm->QueryInterface(kIDOMHTMLFormElementIID, (void**)&formElem);
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if (NS_OK == result) {
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*aForm = formElem;
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}
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}
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return result;
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}
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// An important assumption is that if aForm is null, the previous mForm will not be released
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// This allows nsHTMLFormElement to deal with circular references.
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NS_IMETHODIMP
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nsHTMLLabelElement::SetForm(nsIDOMHTMLFormElement* aForm)
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{
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nsresult result;
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nsIFormControl *formControl;
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result = QueryInterface(kIFormControlIID, (void**)&formControl);
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if (NS_FAILED(result))
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formControl = nsnull;
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if (mForm && formControl)
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mForm->RemoveElement(formControl, PR_TRUE);
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if (nsnull == aForm)
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mForm = nsnull;
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else {
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NS_IF_RELEASE(mForm);
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if (formControl) {
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result = aForm->QueryInterface(kIFormIID, (void**)&mForm); // keep the ref
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if ((NS_OK == result) && mForm) {
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mForm->AddElement(formControl);
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}
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}
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}
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NS_IF_RELEASE(formControl);
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return result;
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}
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NS_IMPL_STRING_ATTR(nsHTMLLabelElement, AccessKey, accesskey)
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//NS_IMPL_STRING_ATTR(nsHTMLLabelElement, HtmlFor, _for)
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NS_IMETHODIMP
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nsHTMLLabelElement::GetHtmlFor(nsString& aValue)
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{
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mInner.GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::_for, aValue);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLabelElement::SetHtmlFor(const nsString& aValue)
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{
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// trim leading and trailing whitespace
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static char whitespace[] = " \r\n\t";
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nsString value(aValue);
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value.Trim(whitespace, PR_TRUE, PR_TRUE);
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return mInner.SetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::defaultvalue, value, PR_TRUE);
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}
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NS_IMETHODIMP
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nsHTMLLabelElement::StringToAttribute(nsIAtom* aAttribute,
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const nsString& aValue,
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nsHTMLValue& aResult)
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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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nsHTMLLabelElement::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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return mInner.AttributeToString(aAttribute, aValue, aResult);
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}
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static void
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MapAttributesInto(const nsIHTMLMappedAttributes* aAttributes,
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nsIMutableStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
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}
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NS_IMETHODIMP
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nsHTMLLabelElement::GetMappedAttributeImpact(const nsIAtom* aAttribute,
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PRInt32& aHint) const
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{
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if (! nsGenericHTMLElement::GetCommonMappedAttributesImpact(aAttribute, aHint)) {
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aHint = NS_STYLE_HINT_CONTENT;
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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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nsHTMLLabelElement::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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nsHTMLLabelElement::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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NS_ENSURE_ARG_POINTER(aEventStatus);
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nsresult rv = mInner.HandleDOMEvent(aPresContext, aEvent, aDOMEvent,
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aFlags, aEventStatus);
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// Now a little special trickery because we are a label:
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// We need to pass this event on to our child iff it is a focus,
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// keypress/up/dn, mouseclick/dblclick/up/down.
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if ((NS_OK == rv) && (nsEventStatus_eIgnore == *aEventStatus) && (NS_EVENT_FLAG_INIT == aFlags)) {
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PRBool isFormElement = PR_FALSE;
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nsIHTMLContent* node = nsnull; // Strong ref to node we are a label for
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switch (aEvent->message) {
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case NS_FOCUS_CONTENT:
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case NS_KEY_PRESS:
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case NS_KEY_UP:
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case NS_KEY_DOWN:
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case NS_MOUSE_LEFT_CLICK:
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case NS_MOUSE_LEFT_DOUBLECLICK:
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case NS_MOUSE_LEFT_BUTTON_UP:
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case NS_MOUSE_LEFT_BUTTON_DOWN:
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case NS_MOUSE_MIDDLE_CLICK:
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case NS_MOUSE_MIDDLE_DOUBLECLICK:
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case NS_MOUSE_MIDDLE_BUTTON_UP:
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case NS_MOUSE_MIDDLE_BUTTON_DOWN:
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case NS_MOUSE_RIGHT_CLICK:
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case NS_MOUSE_RIGHT_DOUBLECLICK:
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case NS_MOUSE_RIGHT_BUTTON_UP:
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case NS_MOUSE_RIGHT_BUTTON_DOWN:
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{
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// Get the element that this label is for
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nsAutoString elementId;
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rv = GetHtmlFor(elementId);
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if (NS_SUCCEEDED(rv) && elementId.Length()) { // --- We have a FOR attr
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nsIDocument* doc = nsnull; // Strong
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rv = mInner.GetDocument(doc);
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if (NS_SUCCEEDED(rv)) {
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nsIDOMHTMLDocument* htmldoc = nsnull; // Strong
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rv = doc->QueryInterface(nsIDOMHTMLDocument::GetIID(),(void**)&htmldoc);
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if (NS_SUCCEEDED(rv)) {
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nsIDOMElement* element = nsnull; // Strong
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rv = htmldoc->GetElementById(elementId, &element);
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if (NS_SUCCEEDED(rv)) {
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rv = element->QueryInterface(nsIHTMLContent::GetIID(),(void**)&node);
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// Find out of this is a form element.
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if (NS_SUCCEEDED(rv)) {
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nsIFormControlFrame* fcFrame = nsnull;
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nsresult gotFrame = nsGenericHTMLElement::GetPrimaryFrame(node, fcFrame);
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isFormElement = NS_SUCCEEDED(gotFrame) && fcFrame;
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}
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NS_RELEASE(element);
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}
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NS_RELEASE(htmldoc);
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}
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NS_RELEASE(doc);
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}
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} else { // --- No FOR attribute, we are a label for our first child element
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PRInt32 numNodes;
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rv = mInner.ChildCount(numNodes);
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if (NS_SUCCEEDED(rv)) {
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nsIContent* contNode = nsnull;
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PRInt32 i;
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for (i = 0; NS_SUCCEEDED(rv) && !isFormElement && (i < numNodes); i++) {
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NS_IF_RELEASE(contNode);
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rv = ChildAt(i, contNode);
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if (NS_SUCCEEDED(rv) && contNode) {
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// We need to make sure this child is a form element
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nsresult isHTMLContent = contNode->QueryInterface(nsIHTMLContent::GetIID(),(void**)&node);
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if (NS_SUCCEEDED(isHTMLContent) && node) {
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nsIFormControlFrame* fcFrame = nsnull;
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nsresult gotFrame = nsGenericHTMLElement::GetPrimaryFrame(node, fcFrame);
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isFormElement = NS_SUCCEEDED(gotFrame) && fcFrame;
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}
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NS_RELEASE(contNode);
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}
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}
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}
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}
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} // Close should handle
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} // Close switch
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// If we found an element, pass along the event to it.
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if (NS_SUCCEEDED(rv) && node) {
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// Only pass along event if this is a form element
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if (isFormElement) {
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rv = node->HandleDOMEvent(aPresContext, aEvent, aDOMEvent, aFlags, aEventStatus);
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}
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NS_RELEASE(node);
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}
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} // Close trickery
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return rv;
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}
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NS_IMETHODIMP
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nsHTMLLabelElement::SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const
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{
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if (!aResult) return NS_ERROR_NULL_POINTER;
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#ifdef DEBUG
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mInner.SizeOf(aSizer, aResult, sizeof(*this));
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if (mForm) {
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PRBool recorded;
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aSizer->RecordObject(mForm, &recorded);
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if (!recorded) {
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PRUint32 formSize;
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mForm->SizeOf(aSizer, &formSize);
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aSizer->AddSize(nsHTMLAtoms::iform, formSize);
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}
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}
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#endif
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return NS_OK;
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}
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