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-rw-r--r--dom/html/HTMLDialogElement.cpp200
1 files changed, 200 insertions, 0 deletions
diff --git a/dom/html/HTMLDialogElement.cpp b/dom/html/HTMLDialogElement.cpp
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+++ b/dom/html/HTMLDialogElement.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/HTMLDialogElement.h"
+#include "mozilla/dom/ElementBinding.h"
+#include "mozilla/dom/HTMLDialogElementBinding.h"
+
+#include "nsContentUtils.h"
+#include "nsFocusManager.h"
+#include "nsIFrame.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Dialog)
+
+namespace mozilla::dom {
+
+HTMLDialogElement::~HTMLDialogElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLDialogElement)
+
+void HTMLDialogElement::Close(
+ const mozilla::dom::Optional<nsAString>& aReturnValue) {
+ if (!Open()) {
+ return;
+ }
+ if (aReturnValue.WasPassed()) {
+ SetReturnValue(aReturnValue.Value());
+ }
+
+ SetOpen(false, IgnoreErrors());
+
+ RemoveFromTopLayerIfNeeded();
+
+ RefPtr<Element> previouslyFocusedElement =
+ do_QueryReferent(mPreviouslyFocusedElement);
+
+ if (previouslyFocusedElement) {
+ mPreviouslyFocusedElement = nullptr;
+
+ FocusOptions options;
+ options.mPreventScroll = true;
+ previouslyFocusedElement->Focus(options, CallerType::NonSystem,
+ IgnoredErrorResult());
+ }
+
+ RefPtr<AsyncEventDispatcher> eventDispatcher =
+ new AsyncEventDispatcher(this, u"close"_ns, CanBubble::eNo);
+ eventDispatcher->PostDOMEvent();
+}
+
+void HTMLDialogElement::Show(ErrorResult& aError) {
+ if (Open()) {
+ if (!IsInTopLayer()) {
+ return;
+ }
+ return aError.ThrowInvalidStateError(
+ "Cannot call show() on an open modal dialog.");
+ }
+
+ SetOpen(true, IgnoreErrors());
+
+ StorePreviouslyFocusedElement();
+
+ RefPtr<nsINode> hideUntil = GetTopmostPopoverAncestor(nullptr, false);
+ if (!hideUntil) {
+ hideUntil = OwnerDoc();
+ }
+
+ OwnerDoc()->HideAllPopoversUntil(*hideUntil, false, true);
+ FocusDialog();
+}
+
+bool HTMLDialogElement::IsInTopLayer() const {
+ return State().HasState(ElementState::MODAL);
+}
+
+void HTMLDialogElement::AddToTopLayerIfNeeded() {
+ MOZ_ASSERT(IsInComposedDoc());
+ if (IsInTopLayer()) {
+ return;
+ }
+
+ OwnerDoc()->AddModalDialog(*this);
+}
+
+void HTMLDialogElement::RemoveFromTopLayerIfNeeded() {
+ if (!IsInTopLayer()) {
+ return;
+ }
+ OwnerDoc()->RemoveModalDialog(*this);
+}
+
+void HTMLDialogElement::StorePreviouslyFocusedElement() {
+ if (Element* element = nsFocusManager::GetFocusedElementStatic()) {
+ if (NS_SUCCEEDED(nsContentUtils::CheckSameOrigin(this, element))) {
+ mPreviouslyFocusedElement = do_GetWeakReference(element);
+ }
+ } else if (Document* doc = GetComposedDoc()) {
+ // Looks like there's a discrepancy sometimes when focus is moved
+ // to a different in-process window.
+ if (nsIContent* unretargetedFocus = doc->GetUnretargetedFocusedContent()) {
+ mPreviouslyFocusedElement = do_GetWeakReference(unretargetedFocus);
+ }
+ }
+}
+
+void HTMLDialogElement::UnbindFromTree(bool aNullParent) {
+ RemoveFromTopLayerIfNeeded();
+ nsGenericHTMLElement::UnbindFromTree(aNullParent);
+}
+
+void HTMLDialogElement::ShowModal(ErrorResult& aError) {
+ if (Open()) {
+ if (IsInTopLayer()) {
+ return;
+ }
+ return aError.ThrowInvalidStateError(
+ "Cannot call showModal() on an open non-modal dialog.");
+ }
+
+ if (!IsInComposedDoc()) {
+ return aError.ThrowInvalidStateError("Dialog element is not connected");
+ }
+
+ if (IsPopoverOpen()) {
+ return aError.ThrowInvalidStateError(
+ "Dialog element is already an open popover.");
+ }
+
+ AddToTopLayerIfNeeded();
+
+ SetOpen(true, aError);
+
+ StorePreviouslyFocusedElement();
+
+ RefPtr<nsINode> hideUntil = GetTopmostPopoverAncestor(nullptr, false);
+ if (!hideUntil) {
+ hideUntil = OwnerDoc();
+ }
+
+ OwnerDoc()->HideAllPopoversUntil(*hideUntil, false, true);
+ FocusDialog();
+
+ aError.SuppressException();
+}
+
+void HTMLDialogElement::FocusDialog() {
+ // 1) If subject is inert, return.
+ // 2) Let control be the first descendant element of subject, in tree
+ // order, that is not inert and has the autofocus attribute specified.
+ RefPtr<Document> doc = OwnerDoc();
+ if (IsInComposedDoc()) {
+ doc->FlushPendingNotifications(FlushType::Frames);
+ }
+
+ RefPtr<Element> control = HasAttr(nsGkAtoms::autofocus)
+ ? this
+ : GetFocusDelegate(false /* aWithMouse */);
+
+ // If there isn't one of those either, then let control be subject.
+ if (!control) {
+ control = this;
+ }
+
+ FocusCandidate(control, IsInTopLayer());
+}
+
+int32_t HTMLDialogElement::TabIndexDefault() { return 0; }
+
+void HTMLDialogElement::QueueCancelDialog() {
+ // queues an element task on the user interaction task source
+ OwnerDoc()->Dispatch(
+ NewRunnableMethod("HTMLDialogElement::RunCancelDialogSteps", this,
+ &HTMLDialogElement::RunCancelDialogSteps));
+}
+
+void HTMLDialogElement::RunCancelDialogSteps() {
+ // 1) Let close be the result of firing an event named cancel at dialog, with
+ // the cancelable attribute initialized to true.
+ bool defaultAction = true;
+ nsContentUtils::DispatchTrustedEvent(OwnerDoc(), this, u"cancel"_ns,
+ CanBubble::eNo, Cancelable::eYes,
+ &defaultAction);
+
+ // 2) If close is true and dialog has an open attribute, then close the dialog
+ // with no return value.
+ if (defaultAction) {
+ Optional<nsAString> retValue;
+ Close(retValue);
+ }
+}
+
+JSObject* HTMLDialogElement::WrapNode(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return HTMLDialogElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace mozilla::dom