forked from mirrors/gecko-dev
e74f1cd513
In order to facilitate the movement of code with side-effects called by Element::SetAttr to Element::BeforeSetAttr and Element::AfterSetAttr, Element::AfterSetAttr should have access to the old value of the attribute. This includes information about whether there was previously a value set or not. Accomplishing this involved passing an additional argument through functions that find and change the old attribute value in order to ensure that we can differentiate between an empty old value and an absent old value (attribute was not set). Note that while I tried to ensure that accurate values (and their absence) are reported to Element::AfterSetAttr, I largely ignored SVG. While the old value reported for SVG values should be however accurate the value already being reported to SetAttrAndNotify was, SVG elements do not currently report unset values properly because they will never pass a null pointer to SetAttrAndNotify. MozReview-Commit-ID: K1mha8CNFZP --HG-- extra : rebase_source : 42776eb01451d371e4aebcc17fe3dd112c8d268b
147 lines
4.2 KiB
C++
147 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/HTMLOptGroupElement.h"
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#include "mozilla/dom/HTMLOptGroupElementBinding.h"
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#include "mozilla/dom/HTMLSelectElement.h" // SafeOptionListMutation
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#include "nsGkAtoms.h"
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#include "nsStyleConsts.h"
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#include "nsIFrame.h"
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#include "nsIFormControlFrame.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(OptGroup)
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namespace mozilla {
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namespace dom {
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/**
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* The implementation of <optgroup>
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*/
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HTMLOptGroupElement::HTMLOptGroupElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: nsGenericHTMLElement(aNodeInfo)
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{
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// We start off enabled
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AddStatesSilently(NS_EVENT_STATE_ENABLED);
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}
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HTMLOptGroupElement::~HTMLOptGroupElement()
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{
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}
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NS_IMPL_ISUPPORTS_INHERITED(HTMLOptGroupElement, nsGenericHTMLElement,
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nsIDOMHTMLOptGroupElement)
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NS_IMPL_ELEMENT_CLONE(HTMLOptGroupElement)
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NS_IMPL_BOOL_ATTR(HTMLOptGroupElement, Disabled, disabled)
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NS_IMPL_STRING_ATTR(HTMLOptGroupElement, Label, label)
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nsresult
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HTMLOptGroupElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
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{
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aVisitor.mCanHandle = false;
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// Do not process any DOM events if the element is disabled
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// XXXsmaug This is not the right thing to do. But what is?
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if (HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) {
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return NS_OK;
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}
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nsIFrame* frame = GetPrimaryFrame();
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if (frame) {
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const nsStyleUserInterface* uiStyle = frame->StyleUserInterface();
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if (uiStyle->mUserInput == StyleUserInput::None ||
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uiStyle->mUserInput == StyleUserInput::Disabled) {
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return NS_OK;
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}
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}
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return nsGenericHTMLElement::GetEventTargetParent(aVisitor);
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}
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Element*
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HTMLOptGroupElement::GetSelect()
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{
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Element* parent = nsINode::GetParentElement();
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if (!parent || !parent->IsHTMLElement(nsGkAtoms::select)) {
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return nullptr;
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}
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return parent;
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}
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nsresult
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HTMLOptGroupElement::InsertChildAt(nsIContent* aKid,
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uint32_t aIndex,
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bool aNotify)
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{
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SafeOptionListMutation safeMutation(GetSelect(), this, aKid, aIndex, aNotify);
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nsresult rv = nsGenericHTMLElement::InsertChildAt(aKid, aIndex, aNotify);
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if (NS_FAILED(rv)) {
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safeMutation.MutationFailed();
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}
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return rv;
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}
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void
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HTMLOptGroupElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
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{
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SafeOptionListMutation safeMutation(GetSelect(), this, nullptr, aIndex,
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aNotify);
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nsGenericHTMLElement::RemoveChildAt(aIndex, aNotify);
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}
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nsresult
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HTMLOptGroupElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue, bool aNotify)
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{
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if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::disabled) {
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// All our children <option> have their :disabled state depending on our
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// disabled attribute. We should make sure their state is updated.
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for (nsIContent* child = nsINode::GetFirstChild(); child;
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child = child->GetNextSibling()) {
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if (child->IsHTMLElement(nsGkAtoms::option)) {
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// No need to call |IsElement()| because it's an HTML element.
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child->AsElement()->UpdateState(true);
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}
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}
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}
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return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName, aValue,
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aOldValue, aNotify);
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}
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EventStates
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HTMLOptGroupElement::IntrinsicState() const
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{
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EventStates state = nsGenericHTMLElement::IntrinsicState();
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if (HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) {
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state |= NS_EVENT_STATE_DISABLED;
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state &= ~NS_EVENT_STATE_ENABLED;
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} else {
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state &= ~NS_EVENT_STATE_DISABLED;
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state |= NS_EVENT_STATE_ENABLED;
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}
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return state;
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}
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JSObject*
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HTMLOptGroupElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HTMLOptGroupElementBinding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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