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-rw-r--r--dom/html/HTMLButtonElement.cpp413
1 files changed, 413 insertions, 0 deletions
diff --git a/dom/html/HTMLButtonElement.cpp b/dom/html/HTMLButtonElement.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/HTMLButtonElement.h"
+
+#include "HTMLFormSubmissionConstants.h"
+#include "mozilla/dom/FormData.h"
+#include "mozilla/dom/HTMLButtonElementBinding.h"
+#include "nsAttrValueInlines.h"
+#include "nsIContentInlines.h"
+#include "nsGkAtoms.h"
+#include "nsStyleConsts.h"
+#include "nsPresContext.h"
+#include "nsIFormControl.h"
+#include "nsIFrame.h"
+#include "nsIFormControlFrame.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/ContentEvents.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/TextEvents.h"
+#include "nsUnicharUtils.h"
+#include "nsLayoutUtils.h"
+#include "mozilla/PresState.h"
+#include "nsError.h"
+#include "nsFocusManager.h"
+#include "mozilla/dom/HTMLFormElement.h"
+#include "mozAutoDocUpdate.h"
+
+#define NS_IN_SUBMIT_CLICK (1 << 0)
+#define NS_OUTER_ACTIVATE_EVENT (1 << 1)
+
+NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(Button)
+
+namespace mozilla::dom {
+
+static const nsAttrValue::EnumTable kButtonTypeTable[] = {
+ {"button", FormControlType::ButtonButton},
+ {"reset", FormControlType::ButtonReset},
+ {"submit", FormControlType::ButtonSubmit},
+ {nullptr, 0}};
+
+// Default type is 'submit'.
+static const nsAttrValue::EnumTable* kButtonDefaultType = &kButtonTypeTable[2];
+
+// Construction, destruction
+HTMLButtonElement::HTMLButtonElement(
+ already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+ FromParser aFromParser)
+ : nsGenericHTMLFormControlElementWithState(
+ std::move(aNodeInfo), aFromParser,
+ FormControlType(kButtonDefaultType->value)),
+ mDisabledChanged(false),
+ mInInternalActivate(false),
+ mInhibitStateRestoration(aFromParser & FROM_PARSER_FRAGMENT) {
+ // Set up our default state: enabled
+ AddStatesSilently(ElementState::ENABLED);
+}
+
+HTMLButtonElement::~HTMLButtonElement() = default;
+
+// nsISupports
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLButtonElement,
+ nsGenericHTMLFormControlElementWithState,
+ mValidity)
+
+NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(
+ HTMLButtonElement, nsGenericHTMLFormControlElementWithState,
+ nsIConstraintValidation)
+
+void HTMLButtonElement::SetCustomValidity(const nsAString& aError) {
+ ConstraintValidation::SetCustomValidity(aError);
+
+ UpdateState(true);
+}
+
+void HTMLButtonElement::UpdateBarredFromConstraintValidation() {
+ SetBarredFromConstraintValidation(
+ mType == FormControlType::ButtonButton ||
+ mType == FormControlType::ButtonReset ||
+ HasFlag(ELEMENT_IS_DATALIST_OR_HAS_DATALIST_ANCESTOR) || IsDisabled());
+}
+
+void HTMLButtonElement::FieldSetDisabledChanged(bool aNotify) {
+ // FieldSetDisabledChanged *has* to be called *before*
+ // UpdateBarredFromConstraintValidation, because the latter depends on our
+ // disabled state.
+ nsGenericHTMLFormControlElementWithState::FieldSetDisabledChanged(aNotify);
+
+ UpdateBarredFromConstraintValidation();
+ UpdateState(aNotify);
+}
+
+NS_IMPL_ELEMENT_CLONE(HTMLButtonElement)
+
+void HTMLButtonElement::GetFormEnctype(nsAString& aFormEncType) {
+ GetEnumAttr(nsGkAtoms::formenctype, "", kFormDefaultEnctype->tag,
+ aFormEncType);
+}
+
+void HTMLButtonElement::GetFormMethod(nsAString& aFormMethod) {
+ GetEnumAttr(nsGkAtoms::formmethod, "", kFormDefaultMethod->tag, aFormMethod);
+}
+
+void HTMLButtonElement::GetType(nsAString& aType) {
+ GetEnumAttr(nsGkAtoms::type, kButtonDefaultType->tag, aType);
+}
+
+int32_t HTMLButtonElement::TabIndexDefault() { return 0; }
+
+bool HTMLButtonElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
+ int32_t* aTabIndex) {
+ if (nsGenericHTMLFormControlElementWithState::IsHTMLFocusable(
+ aWithMouse, aIsFocusable, aTabIndex)) {
+ return true;
+ }
+
+ *aIsFocusable = IsFormControlDefaultFocusable(aWithMouse) && !IsDisabled();
+
+ return false;
+}
+
+bool HTMLButtonElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+ const nsAString& aValue,
+ nsIPrincipal* aMaybeScriptedPrincipal,
+ nsAttrValue& aResult) {
+ if (aNamespaceID == kNameSpaceID_None) {
+ if (aAttribute == nsGkAtoms::type) {
+ return aResult.ParseEnumValue(aValue, kButtonTypeTable, false,
+ kButtonDefaultType);
+ }
+
+ if (aAttribute == nsGkAtoms::formmethod) {
+ if (StaticPrefs::dom_dialog_element_enabled() || IsInChromeDocument()) {
+ return aResult.ParseEnumValue(aValue, kFormMethodTableDialogEnabled,
+ false);
+ }
+ return aResult.ParseEnumValue(aValue, kFormMethodTable, false);
+ }
+ if (aAttribute == nsGkAtoms::formenctype) {
+ return aResult.ParseEnumValue(aValue, kFormEnctypeTable, false);
+ }
+ }
+
+ return nsGenericHTMLFormControlElementWithState::ParseAttribute(
+ aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult);
+}
+
+bool HTMLButtonElement::IsDisabledForEvents(WidgetEvent* aEvent) {
+ nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
+ nsIFrame* formFrame = do_QueryFrame(formControlFrame);
+ return IsElementDisabledForEvents(aEvent, formFrame);
+}
+
+void HTMLButtonElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
+ aVisitor.mCanHandle = false;
+
+ if (IsDisabledForEvents(aVisitor.mEvent)) {
+ return;
+ }
+
+ // Track whether we're in the outermost Dispatch invocation that will
+ // cause activation of the input. That is, if we're a click event, or a
+ // DOMActivate that was dispatched directly, this will be set, but if we're
+ // a DOMActivate dispatched from click handling, it will not be set.
+ WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
+ bool outerActivateEvent =
+ ((mouseEvent && mouseEvent->IsLeftClickEvent()) ||
+ (aVisitor.mEvent->mMessage == eLegacyDOMActivate &&
+ !mInInternalActivate && aVisitor.mEvent->mOriginalTarget == this));
+
+ if (outerActivateEvent) {
+ aVisitor.mItemFlags |= NS_OUTER_ACTIVATE_EVENT;
+ if (mType == FormControlType::ButtonSubmit && mForm &&
+ !aVisitor.mEvent->mFlags.mMultiplePreActionsPrevented) {
+ aVisitor.mEvent->mFlags.mMultiplePreActionsPrevented = true;
+ aVisitor.mItemFlags |= NS_IN_SUBMIT_CLICK;
+ aVisitor.mItemData = static_cast<Element*>(mForm);
+ // tell the form that we are about to enter a click handler.
+ // that means that if there are scripted submissions, the
+ // latest one will be deferred until after the exit point of the handler.
+ mForm->OnSubmitClickBegin(this);
+ }
+ }
+
+ nsGenericHTMLElement::GetEventTargetParent(aVisitor);
+}
+
+nsresult HTMLButtonElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
+ nsresult rv = NS_OK;
+ if (!aVisitor.mPresContext) {
+ return rv;
+ }
+
+ if (aVisitor.mEventStatus != nsEventStatus_eConsumeNoDefault) {
+ WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
+ if (mouseEvent && mouseEvent->IsLeftClickEvent()) {
+ // DOMActive event should be trusted since the activation is actually
+ // occurred even if the cause is an untrusted click event.
+ InternalUIEvent actEvent(true, eLegacyDOMActivate, mouseEvent);
+ actEvent.mDetail = 1;
+
+ if (RefPtr<PresShell> presShell = aVisitor.mPresContext->GetPresShell()) {
+ nsEventStatus status = nsEventStatus_eIgnore;
+ mInInternalActivate = true;
+ presShell->HandleDOMEventWithTarget(this, &actEvent, &status);
+ mInInternalActivate = false;
+
+ // If activate is cancelled, we must do the same as when click is
+ // cancelled (revert the checkbox to its original value).
+ if (status == nsEventStatus_eConsumeNoDefault) {
+ aVisitor.mEventStatus = status;
+ }
+ }
+ }
+ }
+
+ if (nsEventStatus_eIgnore == aVisitor.mEventStatus) {
+ WidgetKeyboardEvent* keyEvent = aVisitor.mEvent->AsKeyboardEvent();
+ if (keyEvent && keyEvent->IsTrusted()) {
+ HandleKeyboardActivation(aVisitor);
+ }
+
+ if (aVisitor.mItemFlags & NS_OUTER_ACTIVATE_EVENT) {
+ if (mForm) {
+ // Hold a strong ref while dispatching
+ RefPtr<mozilla::dom::HTMLFormElement> form(mForm);
+ if (mType == FormControlType::ButtonReset) {
+ form->MaybeReset(this);
+ aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
+ } else if (mType == FormControlType::ButtonSubmit) {
+ form->MaybeSubmit(this);
+ aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
+ }
+ // https://html.spec.whatwg.org/multipage/form-elements.html#attr-button-type-button-state
+ // NS_FORM_BUTTON_BUTTON do nothing.
+ }
+ HandlePopoverTargetAction();
+ }
+ }
+
+ if ((aVisitor.mItemFlags & NS_IN_SUBMIT_CLICK)) {
+ nsCOMPtr<nsIContent> content(do_QueryInterface(aVisitor.mItemData));
+ RefPtr<HTMLFormElement> form = HTMLFormElement::FromNodeOrNull(content);
+ MOZ_ASSERT(form);
+ // Tell the form that we are about to exit a click handler,
+ // so the form knows not to defer subsequent submissions.
+ // The pending ones that were created during the handler
+ // will be flushed or forgotten.
+ form->OnSubmitClickEnd();
+ // Tell the form to flush a possible pending submission.
+ // the reason is that the script returned false (the event was
+ // not ignored) so if there is a stored submission, it needs to
+ // be submitted immediatelly.
+ // Note, NS_IN_SUBMIT_CLICK is set only when we're in outer activate event.
+ form->FlushPendingSubmission();
+ }
+
+ return rv;
+}
+
+nsresult HTMLButtonElement::BindToTree(BindContext& aContext,
+ nsINode& aParent) {
+ nsresult rv =
+ nsGenericHTMLFormControlElementWithState::BindToTree(aContext, aParent);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ UpdateBarredFromConstraintValidation();
+
+ // Update our state; we may now be the default submit element
+ UpdateState(false);
+
+ return NS_OK;
+}
+
+void HTMLButtonElement::UnbindFromTree(bool aNullParent) {
+ nsGenericHTMLFormControlElementWithState::UnbindFromTree(aNullParent);
+
+ UpdateBarredFromConstraintValidation();
+
+ // Update our state; we may no longer be the default submit element
+ UpdateState(false);
+}
+
+NS_IMETHODIMP
+HTMLButtonElement::Reset() { return NS_OK; }
+
+NS_IMETHODIMP
+HTMLButtonElement::SubmitNamesValues(FormData* aFormData) {
+ //
+ // We only submit if we were the button pressed
+ //
+ if (aFormData->GetSubmitterElement() != this) {
+ return NS_OK;
+ }
+
+ //
+ // Get the name (if no name, no submit)
+ //
+ nsAutoString name;
+ GetHTMLAttr(nsGkAtoms::name, name);
+ if (name.IsEmpty()) {
+ return NS_OK;
+ }
+
+ //
+ // Get the value
+ //
+ nsAutoString value;
+ GetHTMLAttr(nsGkAtoms::value, value);
+
+ //
+ // Submit
+ //
+ return aFormData->AddNameValuePair(name, value);
+}
+
+void HTMLButtonElement::DoneCreatingElement() {
+ if (!mInhibitStateRestoration) {
+ GenerateStateKey();
+ RestoreFormControlState();
+ }
+}
+
+void HTMLButtonElement::BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+ const nsAttrValue* aValue, bool aNotify) {
+ if (aNotify && aName == nsGkAtoms::disabled &&
+ aNameSpaceID == kNameSpaceID_None) {
+ mDisabledChanged = true;
+ }
+
+ return nsGenericHTMLFormControlElementWithState::BeforeSetAttr(
+ aNameSpaceID, aName, aValue, aNotify);
+}
+
+void HTMLButtonElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+ const nsAttrValue* aValue,
+ const nsAttrValue* aOldValue,
+ nsIPrincipal* aSubjectPrincipal,
+ bool aNotify) {
+ if (aNameSpaceID == kNameSpaceID_None) {
+ if (aName == nsGkAtoms::type) {
+ if (aValue) {
+ mType = FormControlType(aValue->GetEnumValue());
+ } else {
+ mType = FormControlType(kButtonDefaultType->value);
+ }
+ }
+
+ if (aName == nsGkAtoms::type || aName == nsGkAtoms::disabled) {
+ if (aName == nsGkAtoms::disabled) {
+ // This *has* to be called *before* validity state check because
+ // UpdateBarredFromConstraintValidation depends on our disabled state.
+ UpdateDisabledState(aNotify);
+ }
+
+ UpdateBarredFromConstraintValidation();
+ }
+ }
+
+ return nsGenericHTMLFormControlElementWithState::AfterSetAttr(
+ aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
+}
+
+void HTMLButtonElement::SaveState() {
+ if (!mDisabledChanged) {
+ return;
+ }
+
+ PresState* state = GetPrimaryPresState();
+ if (state) {
+ // We do not want to save the real disabled state but the disabled
+ // attribute.
+ state->disabled() = HasAttr(kNameSpaceID_None, nsGkAtoms::disabled);
+ state->disabledSet() = true;
+ }
+}
+
+bool HTMLButtonElement::RestoreState(PresState* aState) {
+ if (aState && aState->disabledSet() && !aState->disabled()) {
+ SetDisabled(false, IgnoreErrors());
+ }
+
+ return false;
+}
+
+ElementState HTMLButtonElement::IntrinsicState() const {
+ ElementState state =
+ nsGenericHTMLFormControlElementWithState::IntrinsicState();
+
+ if (IsCandidateForConstraintValidation()) {
+ if (IsValid()) {
+ state |= ElementState::VALID | ElementState::USER_VALID;
+ } else {
+ state |= ElementState::INVALID | ElementState::USER_INVALID;
+ }
+ }
+
+ return state;
+}
+
+JSObject* HTMLButtonElement::WrapNode(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return HTMLButtonElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace mozilla::dom