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
513 lines
16 KiB
C++
513 lines
16 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_ADDREF_INHERITED(HTMLButtonElement, Element)
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NS_IMPL_RELEASE_INHERITED(HTMLButtonElement, Element)
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// QueryInterface implementation for HTMLButtonElement
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLButtonElement)
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NS_INTERFACE_TABLE_INHERITED(HTMLButtonElement,
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nsIDOMHTMLButtonElement,
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nsIConstraintValidation)
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NS_INTERFACE_TABLE_TAIL_INHERITING(nsGenericHTMLFormElementWithState)
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// nsIConstraintValidation
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NS_IMPL_NSICONSTRAINTVALIDATION_EXCEPT_SETCUSTOMVALIDITY(HTMLButtonElement)
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NS_IMETHODIMP
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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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return NS_OK;
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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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UpdateBarredFromConstraintValidation();
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nsGenericHTMLFormElementWithState::FieldSetDisabledChanged(aNotify);
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}
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// nsIDOMHTMLButtonElement
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NS_IMPL_ELEMENT_CLONE(HTMLButtonElement)
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// nsIDOMHTMLButtonElement
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NS_IMETHODIMP
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HTMLButtonElement::GetForm(nsIDOMHTMLFormElement** aForm)
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{
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return nsGenericHTMLFormElementWithState::GetForm(aForm);
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}
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NS_IMPL_BOOL_ATTR(HTMLButtonElement, Autofocus, autofocus)
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NS_IMPL_BOOL_ATTR(HTMLButtonElement, Disabled, disabled)
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NS_IMPL_ACTION_ATTR(HTMLButtonElement, FormAction, formaction)
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NS_IMPL_ENUM_ATTR_DEFAULT_MISSING_INVALID_VALUES(HTMLButtonElement, FormEnctype, formenctype,
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"", kFormDefaultEnctype->tag)
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NS_IMPL_ENUM_ATTR_DEFAULT_MISSING_INVALID_VALUES(HTMLButtonElement, FormMethod, formmethod,
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"", kFormDefaultMethod->tag)
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NS_IMPL_BOOL_ATTR(HTMLButtonElement, FormNoValidate, formnovalidate)
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NS_IMPL_STRING_ATTR(HTMLButtonElement, FormTarget, formtarget)
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NS_IMPL_STRING_ATTR(HTMLButtonElement, Name, name)
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NS_IMPL_STRING_ATTR(HTMLButtonElement, Value, value)
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NS_IMPL_ENUM_ATTR_DEFAULT_VALUE(HTMLButtonElement, Type, type,
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kButtonDefaultType->tag)
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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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nsIAtom* aAttribute,
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const nsAString& aValue,
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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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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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GetAttr(kNameSpaceID_None, 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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nsresult rv = GetValue(value);
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if (NS_FAILED(rv)) {
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return rv;
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}
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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, nsIAtom* 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, 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) {
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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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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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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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SetDisabled(false);
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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)
|
|
{
|
|
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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