gecko-dev/content/html/content/src/nsHTMLOptionElement.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nsIDOMHTMLOptionElement.h"
#include "nsIDOMHTMLOptGroupElement.h"
#include "nsIDOMHTMLFormElement.h"
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#include "nsIScriptObjectOwner.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
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#include "nsGenericHTMLElement.h"
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#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIFormControl.h"
#include "nsIForm.h"
#include "nsIDOMText.h"
#include "nsIDOMNode.h"
#include "nsGenericElement.h"
#include "nsIDOMHTMLCollection.h"
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// Notify/query select frame for selected state
#include "nsIFormControlFrame.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIFrame.h"
#include "nsIDOMHTMLSelectElement.h"
static NS_DEFINE_IID(kIDOMHTMLSelectElementIID, NS_IDOMHTMLSELECTELEMENT_IID);
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static NS_DEFINE_IID(kIDOMHTMLOptionElementIID, NS_IDOMHTMLOPTIONELEMENT_IID);
static NS_DEFINE_IID(kIDOMHTMLOptGroupElementIID, NS_IDOMHTMLOPTIONELEMENT_IID);
static NS_DEFINE_IID(kIDOMHTMLFormElementIID, NS_IDOMHTMLFORMELEMENT_IID);
static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);
static NS_DEFINE_IID(kIFormControlIID, NS_IFORMCONTROL_IID);
static NS_DEFINE_IID(kIFormIID, NS_IFORM_IID);
static NS_DEFINE_IID(kIFormControlFrameIID, NS_IFORMCONTROLFRAME_IID);
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class nsHTMLOptionElement : public nsIDOMHTMLOptionElement,
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public nsIScriptObjectOwner,
public nsIDOMEventReceiver,
public nsIHTMLContent
//public nsIFormControl
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{
public:
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nsHTMLOptionElement(nsIAtom* aTag);
virtual ~nsHTMLOptionElement();
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// nsISupports
NS_DECL_ISUPPORTS
// nsIDOMNode
NS_IMPL_IDOMNODE_USING_GENERIC(mInner)
// nsIDOMElement
NS_IMPL_IDOMELEMENT_USING_GENERIC(mInner)
// nsIDOMHTMLElement
NS_IMPL_IDOMHTMLELEMENT_USING_GENERIC(mInner)
// nsIDOMHTMLOptionElement
NS_IMETHOD GetForm(nsIDOMHTMLFormElement** aForm);
NS_IMETHOD GetDefaultSelected(PRBool* aDefaultSelected);
NS_IMETHOD SetDefaultSelected(PRBool aDefaultSelected);
NS_IMETHOD GetText(nsString& aText);
NS_IMETHOD GetIndex(PRInt32* aIndex);
NS_IMETHOD SetIndex(PRInt32 aIndex);
NS_IMETHOD GetDisabled(PRBool* aDisabled);
NS_IMETHOD SetDisabled(PRBool aDisabled);
NS_IMETHOD GetLabel(nsString& aLabel);
NS_IMETHOD SetLabel(const nsString& aLabel);
NS_IMETHOD GetSelected(PRBool* aSelected);
NS_IMETHOD GetValue(nsString& aValue);
NS_IMETHOD SetValue(const nsString& aValue);
// nsIScriptObjectOwner
NS_IMPL_ISCRIPTOBJECTOWNER_USING_GENERIC(mInner)
// nsIDOMEventReceiver
NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC(mInner)
// nsIContent
NS_IMPL_ICONTENT_USING_GENERIC(mInner)
// nsIHTMLContent
NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)
protected:
nsGenericHTMLContainerElement mInner;
// Get the primary frame associated with this content
nsresult GetPrimaryFrame(nsIFormControlFrame *&aFormControlFrame);
// Get the select content element that contains this option
nsresult GetSelect(nsIDOMHTMLSelectElement *&aSelectElement);
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};
nsresult
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NS_NewHTMLOptionElement(nsIHTMLContent** aInstancePtrResult, nsIAtom* aTag)
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{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
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nsIHTMLContent* it = new nsHTMLOptionElement(aTag);
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if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
}
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nsHTMLOptionElement::nsHTMLOptionElement(nsIAtom* aTag)
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{
NS_INIT_REFCNT();
mInner.Init(this, aTag);
}
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nsHTMLOptionElement::~nsHTMLOptionElement()
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{
}
// ISupports
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NS_IMPL_ADDREF(nsHTMLOptionElement)
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nsresult
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nsHTMLOptionElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
if (aIID.Equals(kIDOMHTMLOptionElementIID)) {
*aInstancePtr = (void*)(nsIDOMHTMLOptionElement*) this;
mRefCnt++;
return NS_OK;
}
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return NS_NOINTERFACE;
}
// the option has a ref to the form, but not vice versa. The form can get to the
// options via the select.
NS_IMETHODIMP_(nsrefcnt)
nsHTMLOptionElement::Release()
{
--mRefCnt;
if (mRefCnt <= 0) {
delete this;
return 0;
} else {
return mRefCnt;
}
}
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nsresult
nsHTMLOptionElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
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{
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nsHTMLOptionElement* it = new nsHTMLOptionElement(mInner.mTag);
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if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
mInner.CopyInnerTo(this, &it->mInner, aDeep);
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return it->QueryInterface(kIDOMNodeIID, (void**) aReturn);
}
NS_IMETHODIMP
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nsHTMLOptionElement::GetForm(nsIDOMHTMLFormElement** aForm)
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{
nsIDOMHTMLSelectElement* selectElement = nsnull;
nsresult res = GetSelect(selectElement);
if (NS_OK == res) {
nsIFormControl* selectControl = nsnull;
res = selectElement->QueryInterface(kIFormControlIID, (void**)&selectControl);
NS_RELEASE(selectElement);
if (NS_OK == res) {
res = selectControl->GetForm(aForm);
NS_RELEASE(selectControl);
}
}
return res;
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}
NS_IMETHODIMP
nsHTMLOptionElement::GetSelected(PRBool* aValue)
{
nsIFormControlFrame* formControlFrame = nsnull;
nsresult rv = GetPrimaryFrame(formControlFrame);
if (NS_SUCCEEDED(rv)) {
PRInt32 index;
if (NS_OK == GetIndex(&index)) {
nsString value;
value.Append(index, 10); // Save the index in base 10
formControlFrame->GetProperty(nsHTMLAtoms::selected, value);
if (value == "1")
*aValue = PR_TRUE;
else
*aValue = PR_FALSE;
}
}
return rv;
}
//NS_IMPL_BOOL_ATTR(nsHTMLOptionElement, DefaultSelected, defaultselected)
//NS_IMPL_INT_ATTR(nsHTMLOptionElement, Index, index)
NS_IMPL_BOOL_ATTR(nsHTMLOptionElement, Disabled, disabled)
NS_IMPL_STRING_ATTR(nsHTMLOptionElement, Label, label)
NS_IMPL_STRING_ATTR(nsHTMLOptionElement, Value, value)
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NS_IMETHODIMP
nsHTMLOptionElement::GetDefaultSelected(PRBool* aDefaultSelected)
{
nsHTMLValue val;
nsresult rv = mInner.GetHTMLAttribute(nsHTMLAtoms::selected, val);
*aDefaultSelected = (NS_CONTENT_ATTR_NOT_THERE != rv);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLOptionElement::SetDefaultSelected(PRBool aDefaultSelected)
{
nsHTMLValue empty(eHTMLUnit_Empty);
if (aDefaultSelected) {
return mInner.SetHTMLAttribute(nsHTMLAtoms::selected, empty, PR_TRUE);
} else {
mInner.UnsetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::selected, PR_TRUE);
return NS_OK;
}
}
NS_IMETHODIMP
nsHTMLOptionElement::GetIndex(PRInt32* aIndex)
{
nsresult res = NS_ERROR_FAILURE;
*aIndex = -1; // -1 indicates the index was not found
// Get our nsIDOMNode interface to compare apples to apples.
nsIDOMNode* thisNode = nsnull;
if (NS_OK == this->QueryInterface(kIDOMNodeIID, (void**)&thisNode)) {
// Get our containing select content object.
nsIDOMHTMLSelectElement* selectElement = nsnull;
if (NS_OK == GetSelect(selectElement)) {
// Get the options from the select object.
nsIDOMHTMLCollection* options = nsnull;
if (NS_OK == selectElement->GetOptions(&options)) {
// Walk the options to find out where we are in the list (ick, O(n))
PRUint32 length = 0;
options->GetLength(&length);
nsIDOMNode* thisOption = nsnull;
for (PRUint32 i = 0; i < length; i++) {
options->Item(i, &thisOption);
if (thisNode == thisOption) {
res = NS_OK;
*aIndex = i;
break;
}
NS_IF_RELEASE(thisOption);
}
NS_RELEASE(options);
}
NS_RELEASE(selectElement);
}
NS_RELEASE(thisNode);
}
return res;
}
// This method does nothing for now as Index is supposed to be a read-only property
// (See the DOM Errata)
NS_IMETHODIMP
nsHTMLOptionElement::SetIndex(PRInt32 aIndex)
{
return NS_OK;
}
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NS_IMETHODIMP
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nsHTMLOptionElement::StringToAttribute(nsIAtom* aAttribute,
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const nsString& aValue,
nsHTMLValue& aResult)
{
if (aAttribute == nsHTMLAtoms::selected) {
aResult.SetEmptyValue();
return NS_CONTENT_ATTR_HAS_VALUE;
}
else if (aAttribute == nsHTMLAtoms::disabled) {
aResult.SetEmptyValue();
return NS_CONTENT_ATTR_HAS_VALUE;
}
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return NS_CONTENT_ATTR_NOT_THERE;
}
NS_IMETHODIMP
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nsHTMLOptionElement::AttributeToString(nsIAtom* aAttribute,
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const nsHTMLValue& aValue,
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nsString& aResult) const
{
return mInner.AttributeToString(aAttribute, aValue, aResult);
}
static void
MapAttributesInto(nsIHTMLAttributes* aAttributes,
nsIStyleContext* aContext,
nsIPresContext* aPresContext)
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{
nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
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}
NS_IMETHODIMP
nsHTMLOptionElement::GetAttributeMappingFunctions(nsMapAttributesFunc& aFontMapFunc,
nsMapAttributesFunc& aMapFunc) const
{
aFontMapFunc = nsnull;
aMapFunc = &MapAttributesInto;
return NS_OK;
}
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NS_IMETHODIMP
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nsHTMLOptionElement::HandleDOMEvent(nsIPresContext& aPresContext,
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nsEvent* aEvent,
nsIDOMEvent** aDOMEvent,
PRUint32 aFlags,
nsEventStatus& aEventStatus)
{
return mInner.HandleDOMEvent(aPresContext, aEvent, aDOMEvent,
aFlags, aEventStatus);
}
NS_IMETHODIMP
nsHTMLOptionElement::GetText(nsString& aText)
{
aText.SetLength(0);
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PRInt32 numNodes;
nsresult rv = mInner.ChildCount(numNodes);
if (NS_FAILED(rv)) {
return rv;
}
for (PRInt32 i = 0; i < numNodes; i++) {
nsIContent* node;
rv = ChildAt(i, node);
if (NS_SUCCEEDED(rv)) {
nsIDOMText* domText = nsnull;
rv = node->QueryInterface(kIDOMTextIID, (void**)&domText);
if (NS_SUCCEEDED(rv) && domText) {
rv = domText->GetData(aText);
aText.CompressWhitespace(PR_TRUE, PR_TRUE);
NS_RELEASE(domText);
NS_RELEASE(node);
break;
}
NS_RELEASE(node);
}
}
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return NS_OK;
}
NS_IMETHODIMP
nsHTMLOptionElement::GetStyleHintForAttributeChange(
const nsIAtom* aAttribute,
PRInt32 *aHint) const
{
nsGenericHTMLElement::GetStyleHintForCommonAttributes(this, aAttribute, aHint);
return NS_OK;
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}
// Options don't have frames - get the select content node
// then call nsGenericHTMLElement::GetPrimaryFrame()
nsresult nsHTMLOptionElement::GetPrimaryFrame(nsIFormControlFrame *&aIFormControlFrame)
{
nsIDOMHTMLSelectElement* selectElement = nsnull;
nsresult res = GetSelect(selectElement);
if (NS_OK == res) {
nsIHTMLContent* selectContent = nsnull;
nsresult gotContent = selectElement->QueryInterface(kIContentIID, (void**)&selectContent);
NS_RELEASE(selectElement);
if (NS_OK == gotContent) {
res = nsGenericHTMLElement::GetPrimaryFrame(selectContent, aIFormControlFrame);
NS_RELEASE(selectContent);
}
}
return res;
}
// Get the select content element that contains this option
nsresult nsHTMLOptionElement::GetSelect(nsIDOMHTMLSelectElement *&aSelectElement)
{
// Get the containing element (Either a select or an optGroup)
nsIDOMNode* parentNode = nsnull;
nsresult res = NS_ERROR_FAILURE;
if (NS_OK == this->GetParentNode(&parentNode)) {
aSelectElement = nsnull;
res = parentNode->QueryInterface(kIDOMHTMLSelectElementIID, (void**)&aSelectElement);
// If we are in an OptGroup we need to GetParentNode again (at least once)
if (NS_OK != res) {
nsIDOMHTMLOptGroupElement* optgroupElement = nsnull;
while (1) { // Be ready for nested OptGroups
if (NS_OK == parentNode->QueryInterface(kIDOMHTMLOptGroupElementIID, (void**)&optgroupElement)) {
NS_RELEASE(optgroupElement); // Don't need the optgroup, just seeing if it IS one.
nsIDOMNode* grandParentNode = nsnull;
if (NS_OK == parentNode->GetParentNode(&grandParentNode)) {
NS_RELEASE(parentNode);
parentNode = grandParentNode;
} else {
break; // Break out if we can't get our parent (we're screwed)
}
} else {
break; // Break out if not a OptGroup (hopefully we have a select)
}
}
res = parentNode->QueryInterface(kIDOMHTMLSelectElementIID, (void**)&aSelectElement);
}
// We have a select if we're gonna get one, so let go of the generic node
NS_RELEASE(parentNode);
}
return res;
}