| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "third_party/blink/renderer/core/html/html_dialog_element.h" |
| |
| #include "third_party/blink/renderer/core/accessibility/ax_object_cache.h" |
| #include "third_party/blink/renderer/core/dom/events/event.h" |
| #include "third_party/blink/renderer/core/dom/flat_tree_traversal.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/frame/local_frame_view.h" |
| #include "third_party/blink/renderer/core/frame/use_counter.h" |
| #include "third_party/blink/renderer/core/fullscreen/fullscreen.h" |
| #include "third_party/blink/renderer/core/html/forms/html_form_control_element.h" |
| #include "third_party/blink/renderer/core/html/html_frame_owner_element.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| |
| namespace blink { |
| |
| using namespace HTMLNames; |
| |
| // This function chooses the focused element when show() or showModal() is |
| // invoked, as described in their spec. |
| static void SetFocusForDialog(HTMLDialogElement* dialog) { |
| Element* focusable_descendant = nullptr; |
| Node* next = nullptr; |
| |
| // TODO(kochi): How to find focusable element inside Shadow DOM is not |
| // currently specified. This may change at any time. |
| // See crbug/383230 and https://github.com/whatwg/html/issues/2393 . |
| for (Node* node = FlatTreeTraversal::FirstChild(*dialog); node; node = next) { |
| next = IsHTMLDialogElement(*node) |
| ? FlatTreeTraversal::NextSkippingChildren(*node, dialog) |
| : FlatTreeTraversal::Next(*node, dialog); |
| |
| if (!node->IsElementNode()) |
| continue; |
| Element* element = ToElement(node); |
| if (element->IsFormControlElement()) { |
| HTMLFormControlElement* control = ToHTMLFormControlElement(node); |
| if (control->IsAutofocusable() && control->IsFocusable()) { |
| control->focus(); |
| return; |
| } |
| } |
| if (!focusable_descendant && element->IsFocusable()) |
| focusable_descendant = element; |
| } |
| |
| if (focusable_descendant) { |
| focusable_descendant->focus(); |
| return; |
| } |
| |
| if (dialog->IsFocusable()) { |
| dialog->focus(); |
| return; |
| } |
| |
| dialog->GetDocument().ClearFocusedElement(); |
| } |
| |
| static void InertSubtreesChanged(Document& document) { |
| // SetIsInert recurses through subframes to propagate the inert bit. |
| if (document.GetFrame()) { |
| document.GetFrame()->SetIsInert(document.LocalOwner() && |
| document.LocalOwner()->IsInert()); |
| } |
| |
| // When a modal dialog opens or closes, nodes all over the accessibility |
| // tree can change inertness which means they must be added or removed from |
| // the tree. The most foolproof way is to clear the entire tree and rebuild |
| // it, though a more clever way is probably possible. |
| document.ClearAXObjectCache(); |
| } |
| |
| inline HTMLDialogElement::HTMLDialogElement(Document& document) |
| : HTMLElement(dialogTag, document), |
| centering_mode_(kNotCentered), |
| centered_position_(0), |
| return_value_("") { |
| UseCounter::Count(document, WebFeature::kDialogElement); |
| } |
| |
| DEFINE_NODE_FACTORY(HTMLDialogElement) |
| |
| void HTMLDialogElement::close(const String& return_value) { |
| // https://html.spec.whatwg.org/#close-the-dialog |
| |
| if (!FastHasAttribute(openAttr)) |
| return; |
| SetBooleanAttribute(openAttr, false); |
| |
| HTMLDialogElement* active_modal_dialog = GetDocument().ActiveModalDialog(); |
| GetDocument().RemoveFromTopLayer(this); |
| if (active_modal_dialog == this) |
| InertSubtreesChanged(GetDocument()); |
| |
| if (!return_value.IsNull()) |
| return_value_ = return_value; |
| |
| ScheduleCloseEvent(); |
| } |
| |
| void HTMLDialogElement::ForceLayoutForCentering() { |
| centering_mode_ = kNeedsCentering; |
| GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets(); |
| if (centering_mode_ == kNeedsCentering) |
| SetNotCentered(); |
| } |
| |
| void HTMLDialogElement::ScheduleCloseEvent() { |
| Event* event = Event::Create(EventTypeNames::close); |
| event->SetTarget(this); |
| GetDocument().EnqueueAnimationFrameEvent(event); |
| } |
| |
| void HTMLDialogElement::show() { |
| if (FastHasAttribute(openAttr)) |
| return; |
| SetBooleanAttribute(openAttr, true); |
| |
| // The layout must be updated here because setFocusForDialog calls |
| // Element::isFocusable, which requires an up-to-date layout. |
| GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| SetFocusForDialog(this); |
| } |
| |
| void HTMLDialogElement::showModal(ExceptionState& exception_state) { |
| if (FastHasAttribute(openAttr)) { |
| exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError, |
| "The element already has an 'open' " |
| "attribute, and therefore cannot be " |
| "opened modally."); |
| return; |
| } |
| if (!isConnected()) { |
| exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError, |
| "The element is not in a Document."); |
| return; |
| } |
| |
| // See comment in |Fullscreen::RequestFullscreen|. |
| if (Fullscreen::IsInFullscreenElementStack(*this)) { |
| UseCounter::Count(GetDocument(), |
| WebFeature::kShowModalForElementInFullscreenStack); |
| } |
| |
| GetDocument().AddToTopLayer(this); |
| SetBooleanAttribute(openAttr, true); |
| |
| ForceLayoutForCentering(); |
| |
| // Throw away the AX cache first, so the subsequent steps don't have a chance |
| // of queuing up AX events on objects that would be invalidated when the cache |
| // is thrown away. |
| InertSubtreesChanged(GetDocument()); |
| |
| SetFocusForDialog(this); |
| } |
| |
| void HTMLDialogElement::RemovedFrom(ContainerNode& insertion_point) { |
| HTMLElement::RemovedFrom(insertion_point); |
| SetNotCentered(); |
| InertSubtreesChanged(GetDocument()); |
| } |
| |
| void HTMLDialogElement::SetCentered(LayoutUnit centered_position) { |
| DCHECK_EQ(centering_mode_, kNeedsCentering); |
| centered_position_ = centered_position; |
| centering_mode_ = kCentered; |
| } |
| |
| void HTMLDialogElement::SetNotCentered() { |
| centering_mode_ = kNotCentered; |
| } |
| |
| bool HTMLDialogElement::IsPresentationAttribute( |
| const QualifiedName& name) const { |
| // FIXME: Workaround for <https://bugs.webkit.org/show_bug.cgi?id=91058>: |
| // modifying an attribute for which there is an attribute selector in html.css |
| // sometimes does not trigger a style recalc. |
| if (name == openAttr) |
| return true; |
| |
| return HTMLElement::IsPresentationAttribute(name); |
| } |
| |
| void HTMLDialogElement::DefaultEventHandler(Event& event) { |
| if (event.type() == EventTypeNames::cancel) { |
| close(); |
| event.SetDefaultHandled(); |
| return; |
| } |
| HTMLElement::DefaultEventHandler(event); |
| } |
| |
| } // namespace blink |