зеркало из https://github.com/mozilla/gecko-dev.git
507 строки
15 KiB
C++
507 строки
15 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/dom/HTMLButtonElement.h"
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#include "HTMLFormSubmissionConstants.h"
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#include "mozilla/dom/HTMLButtonElementBinding.h"
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#include "mozilla/dom/HTMLFormSubmission.h"
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#include "nsIDOMHTMLFormElement.h"
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#include "nsAttrValueInlines.h"
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#include "nsGkAtoms.h"
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#include "nsIPresShell.h"
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#include "nsStyleConsts.h"
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#include "nsPresContext.h"
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#include "nsIFormControl.h"
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#include "nsIURL.h"
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#include "nsIFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsIDOMEvent.h"
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#include "nsIDocument.h"
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#include "mozilla/ContentEvents.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/TextEvents.h"
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#include "nsUnicharUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsPresState.h"
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#include "nsError.h"
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#include "nsFocusManager.h"
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#include "mozilla/dom/HTMLFormElement.h"
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#include "mozAutoDocUpdate.h"
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#define NS_IN_SUBMIT_CLICK (1 << 0)
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#define NS_OUTER_ACTIVATE_EVENT (1 << 1)
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NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(Button)
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namespace mozilla {
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namespace dom {
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static const nsAttrValue::EnumTable kButtonTypeTable[] = {
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{ "button", NS_FORM_BUTTON_BUTTON },
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{ "reset", NS_FORM_BUTTON_RESET },
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{ "submit", NS_FORM_BUTTON_SUBMIT },
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{ nullptr, 0 }
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};
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// Default type is 'submit'.
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static const nsAttrValue::EnumTable* kButtonDefaultType = &kButtonTypeTable[2];
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// Construction, destruction
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HTMLButtonElement::HTMLButtonElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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FromParser aFromParser)
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: nsGenericHTMLFormElementWithState(aNodeInfo, kButtonDefaultType->value),
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mDisabledChanged(false),
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mInInternalActivate(false),
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mInhibitStateRestoration(!!(aFromParser & FROM_PARSER_FRAGMENT))
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{
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// Set up our default state: enabled
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AddStatesSilently(NS_EVENT_STATE_ENABLED);
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}
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HTMLButtonElement::~HTMLButtonElement()
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{
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}
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// nsISupports
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NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLButtonElement,
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nsGenericHTMLFormElementWithState,
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mValidity)
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NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLButtonElement,
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nsGenericHTMLFormElementWithState,
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nsIConstraintValidation)
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void
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HTMLButtonElement::SetCustomValidity(const nsAString& aError)
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{
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nsIConstraintValidation::SetCustomValidity(aError);
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UpdateState(true);
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}
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void
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HTMLButtonElement::UpdateBarredFromConstraintValidation()
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{
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SetBarredFromConstraintValidation(mType == NS_FORM_BUTTON_BUTTON ||
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mType == NS_FORM_BUTTON_RESET ||
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IsDisabled());
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}
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void
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HTMLButtonElement::FieldSetDisabledChanged(bool aNotify)
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{
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// FieldSetDisabledChanged *has* to be called *before*
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// UpdateBarredFromConstraintValidation, because the latter depends on our
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// disabled state.
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nsGenericHTMLFormElementWithState::FieldSetDisabledChanged(aNotify);
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UpdateBarredFromConstraintValidation();
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UpdateState(aNotify);
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}
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NS_IMPL_ELEMENT_CLONE(HTMLButtonElement)
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void
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HTMLButtonElement::GetFormEnctype(nsAString& aFormEncType)
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{
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GetEnumAttr(nsGkAtoms::formenctype, "", kFormDefaultEnctype->tag, aFormEncType);
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}
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void
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HTMLButtonElement::GetFormMethod(nsAString& aFormMethod)
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{
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GetEnumAttr(nsGkAtoms::formmethod, "", kFormDefaultMethod->tag, aFormMethod);
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}
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void
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HTMLButtonElement::GetType(nsAString& aType)
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{
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GetEnumAttr(nsGkAtoms::type, kButtonDefaultType->tag, aType);
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}
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int32_t
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HTMLButtonElement::TabIndexDefault()
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{
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return 0;
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}
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bool
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HTMLButtonElement::IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable, int32_t *aTabIndex)
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{
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if (nsGenericHTMLFormElementWithState::IsHTMLFocusable(aWithMouse, aIsFocusable, aTabIndex)) {
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return true;
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}
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*aIsFocusable =
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#ifdef XP_MACOSX
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(!aWithMouse || nsFocusManager::sMouseFocusesFormControl) &&
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#endif
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!IsDisabled();
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return false;
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}
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bool
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HTMLButtonElement::ParseAttribute(int32_t aNamespaceID,
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nsAtom* aAttribute,
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const nsAString& aValue,
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nsIPrincipal* aMaybeScriptedPrincipal,
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nsAttrValue& aResult)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::type) {
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return aResult.ParseEnumValue(aValue, kButtonTypeTable, false,
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kButtonDefaultType);
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}
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if (aAttribute == nsGkAtoms::formmethod) {
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return aResult.ParseEnumValue(aValue, kFormMethodTable, false);
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}
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if (aAttribute == nsGkAtoms::formenctype) {
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return aResult.ParseEnumValue(aValue, kFormEnctypeTable, false);
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}
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}
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return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aMaybeScriptedPrincipal, aResult);
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}
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bool
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HTMLButtonElement::IsDisabledForEvents(EventMessage aMessage)
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{
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nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
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nsIFrame* formFrame = do_QueryFrame(formControlFrame);
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return IsElementDisabledForEvents(aMessage, formFrame);
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}
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nsresult
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HTMLButtonElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
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{
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aVisitor.mCanHandle = false;
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if (IsDisabledForEvents(aVisitor.mEvent->mMessage)) {
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return NS_OK;
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}
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// Track whether we're in the outermost Dispatch invocation that will
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// cause activation of the input. That is, if we're a click event, or a
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// DOMActivate that was dispatched directly, this will be set, but if we're
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// a DOMActivate dispatched from click handling, it will not be set.
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WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
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bool outerActivateEvent =
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((mouseEvent && mouseEvent->IsLeftClickEvent()) ||
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(aVisitor.mEvent->mMessage == eLegacyDOMActivate &&
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!mInInternalActivate));
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if (outerActivateEvent) {
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aVisitor.mItemFlags |= NS_OUTER_ACTIVATE_EVENT;
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if (mType == NS_FORM_BUTTON_SUBMIT && mForm) {
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aVisitor.mItemFlags |= NS_IN_SUBMIT_CLICK;
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// tell the form that we are about to enter a click handler.
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// that means that if there are scripted submissions, the
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// latest one will be deferred until after the exit point of the handler.
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mForm->OnSubmitClickBegin(this);
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}
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}
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return nsGenericHTMLElement::GetEventTargetParent(aVisitor);
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}
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nsresult
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HTMLButtonElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
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{
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nsresult rv = NS_OK;
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if (!aVisitor.mPresContext) {
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return rv;
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}
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if (aVisitor.mEventStatus != nsEventStatus_eConsumeNoDefault) {
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WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
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if (mouseEvent && mouseEvent->IsLeftClickEvent()) {
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// DOMActive event should be trusted since the activation is actually
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// occurred even if the cause is an untrusted click event.
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InternalUIEvent actEvent(true, eLegacyDOMActivate, mouseEvent);
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actEvent.mDetail = 1;
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nsCOMPtr<nsIPresShell> shell = aVisitor.mPresContext->GetPresShell();
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if (shell) {
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nsEventStatus status = nsEventStatus_eIgnore;
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mInInternalActivate = true;
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shell->HandleDOMEventWithTarget(this, &actEvent, &status);
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mInInternalActivate = false;
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// If activate is cancelled, we must do the same as when click is
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// cancelled (revert the checkbox to its original value).
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if (status == nsEventStatus_eConsumeNoDefault) {
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aVisitor.mEventStatus = status;
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}
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}
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}
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}
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// mForm is null if the event handler removed us from the document (bug 194582).
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if ((aVisitor.mItemFlags & NS_IN_SUBMIT_CLICK) && mForm) {
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// tell the form that we are about to exit a click handler
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// so the form knows not to defer subsequent submissions
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// the pending ones that were created during the handler
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// will be flushed or forgoten.
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mForm->OnSubmitClickEnd();
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}
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if (nsEventStatus_eIgnore == aVisitor.mEventStatus) {
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switch (aVisitor.mEvent->mMessage) {
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case eKeyPress:
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case eKeyUp:
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{
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// For backwards compat, trigger buttons with space or enter
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// (bug 25300)
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WidgetKeyboardEvent* keyEvent = aVisitor.mEvent->AsKeyboardEvent();
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if ((keyEvent->mKeyCode == NS_VK_RETURN &&
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eKeyPress == aVisitor.mEvent->mMessage) ||
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(keyEvent->mKeyCode == NS_VK_SPACE &&
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eKeyUp == aVisitor.mEvent->mMessage)) {
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DispatchSimulatedClick(this, aVisitor.mEvent->IsTrusted(),
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aVisitor.mPresContext);
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aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
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}
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}
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break;
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default:
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break;
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}
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if (aVisitor.mItemFlags & NS_OUTER_ACTIVATE_EVENT) {
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if (mForm && (mType == NS_FORM_BUTTON_SUBMIT ||
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mType == NS_FORM_BUTTON_RESET)) {
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InternalFormEvent event(true,
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(mType == NS_FORM_BUTTON_RESET) ? eFormReset : eFormSubmit);
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event.mOriginator = this;
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nsEventStatus status = nsEventStatus_eIgnore;
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nsCOMPtr<nsIPresShell> presShell =
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aVisitor.mPresContext->GetPresShell();
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// If |nsIPresShell::Destroy| has been called due to
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// handling the event, the pres context will return
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// a null pres shell. See bug 125624.
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//
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// Using presShell to dispatch the event. It makes sure that
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// event is not handled if the window is being destroyed.
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if (presShell && (event.mMessage != eFormSubmit ||
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mForm->SubmissionCanProceed(this))) {
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// TODO: removing this code and have the submit event sent by the form
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// see bug 592124.
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// Hold a strong ref while dispatching
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RefPtr<HTMLFormElement> form(mForm);
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presShell->HandleDOMEventWithTarget(form, &event, &status);
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aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
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}
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}
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}
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} else if ((aVisitor.mItemFlags & NS_IN_SUBMIT_CLICK) && mForm) {
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// Tell the form to flush a possible pending submission.
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// the reason is that the script returned false (the event was
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// not ignored) so if there is a stored submission, it needs to
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// be submitted immediatelly.
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// Note, NS_IN_SUBMIT_CLICK is set only when we're in outer activate event.
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mForm->FlushPendingSubmission();
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} //if
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return rv;
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}
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nsresult
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HTMLButtonElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers)
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{
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nsresult rv =
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nsGenericHTMLFormElementWithState::BindToTree(aDocument, aParent, aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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// Update our state; we may now be the default submit element
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UpdateState(false);
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return NS_OK;
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}
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void
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HTMLButtonElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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nsGenericHTMLFormElementWithState::UnbindFromTree(aDeep, aNullParent);
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// Update our state; we may no longer be the default submit element
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UpdateState(false);
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}
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NS_IMETHODIMP
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HTMLButtonElement::Reset()
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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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HTMLButtonElement::SubmitNamesValues(HTMLFormSubmission* aFormSubmission)
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{
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//
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// We only submit if we were the button pressed
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//
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if (aFormSubmission->GetOriginatingElement() != this) {
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return NS_OK;
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}
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// Disabled elements don't submit
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if (IsDisabled()) {
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return NS_OK;
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}
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//
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// Get the name (if no name, no submit)
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//
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nsAutoString name;
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GetHTMLAttr(nsGkAtoms::name, name);
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if (name.IsEmpty()) {
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return NS_OK;
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}
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//
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// Get the value
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//
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nsAutoString value;
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GetHTMLAttr(nsGkAtoms::value, value);
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//
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// Submit
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//
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return aFormSubmission->AddNameValuePair(name, value);
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}
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void
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HTMLButtonElement::DoneCreatingElement()
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{
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if (!mInhibitStateRestoration) {
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nsresult rv = GenerateStateKey();
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if (NS_SUCCEEDED(rv)) {
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RestoreFormControlState();
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}
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}
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}
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nsresult
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HTMLButtonElement::BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
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const nsAttrValueOrString* aValue,
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bool aNotify)
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{
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if (aNotify && aName == nsGkAtoms::disabled &&
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aNameSpaceID == kNameSpaceID_None) {
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mDisabledChanged = true;
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}
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return nsGenericHTMLFormElementWithState::BeforeSetAttr(aNameSpaceID, aName,
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aValue, aNotify);
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}
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nsresult
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HTMLButtonElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify)
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{
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if (aNameSpaceID == kNameSpaceID_None) {
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if (aName == nsGkAtoms::type) {
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if (aValue) {
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mType = aValue->GetEnumValue();
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} else {
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mType = kButtonDefaultType->value;
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}
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}
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if (aName == nsGkAtoms::type || aName == nsGkAtoms::disabled) {
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if (aName == nsGkAtoms::disabled) {
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// This *has* to be called *before* validity state check because
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// UpdateBarredFromConstraintValidation depends on our disabled state.
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UpdateDisabledState(aNotify);
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}
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UpdateBarredFromConstraintValidation();
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}
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}
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return nsGenericHTMLFormElementWithState::AfterSetAttr(aNameSpaceID, aName,
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aValue, aOldValue,
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aSubjectPrincipal, aNotify);
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}
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NS_IMETHODIMP
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HTMLButtonElement::SaveState()
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{
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if (!mDisabledChanged) {
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return NS_OK;
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}
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nsPresState* state = GetPrimaryPresState();
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if (state) {
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// We do not want to save the real disabled state but the disabled
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// attribute.
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state->SetDisabled(HasAttr(kNameSpaceID_None, nsGkAtoms::disabled));
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}
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return NS_OK;
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}
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bool
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HTMLButtonElement::RestoreState(nsPresState* aState)
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{
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if (aState && aState->IsDisabledSet() && !aState->GetDisabled()) {
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IgnoredErrorResult rv;
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SetDisabled(false, rv);
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}
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return false;
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}
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EventStates
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HTMLButtonElement::IntrinsicState() const
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{
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EventStates state = nsGenericHTMLFormElementWithState::IntrinsicState();
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if (IsCandidateForConstraintValidation()) {
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if (IsValid()) {
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state |= NS_EVENT_STATE_VALID;
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if (!mForm || !mForm->HasAttr(kNameSpaceID_None, nsGkAtoms::novalidate)) {
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state |= NS_EVENT_STATE_MOZ_UI_VALID;
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}
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} else {
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state |= NS_EVENT_STATE_INVALID;
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if (!mForm || !mForm->HasAttr(kNameSpaceID_None, nsGkAtoms::novalidate)) {
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state |= NS_EVENT_STATE_MOZ_UI_INVALID;
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}
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}
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}
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if (mForm && !mForm->GetValidity() && IsSubmitControl()) {
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state |= NS_EVENT_STATE_MOZ_SUBMITINVALID;
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}
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return state;
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}
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JSObject*
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HTMLButtonElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HTMLButtonElementBinding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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