dom/html/HTMLSummaryElement.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/HTMLSummaryElement.h"
   8
   9 #include "mozilla/dom/HTMLDetailsElement.h"
  10 #include "mozilla/dom/HTMLElementBinding.h"
  11 #include "mozilla/dom/HTMLUnknownElement.h"
  12 #include "mozilla/EventDispatcher.h"
  13 #include "mozilla/MouseEvents.h"
  14 #include "mozilla/Preferences.h"
  15 #include "mozilla/TextEvents.h"
  16 #include "nsFocusManager.h"
  17
  18 NS_IMPL_NS_NEW_HTML_ELEMENT(Summary)
  19
  20 namespace mozilla::dom {
  21
  22 HTMLSummaryElement::~HTMLSummaryElement() = default;
  23
  24 NS_IMPL_ELEMENT_CLONE(HTMLSummaryElement)
  25
  26 nsresult HTMLSummaryElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
  27   nsresult rv = NS_OK;
  28   if (!aVisitor.mPresContext) {
  29     return rv;
  30   }
  31
  32   if (aVisitor.mEventStatus == nsEventStatus_eConsumeNoDefault) {
  33     return rv;
  34   }
  35
  36   if (!IsMainSummary()) {
  37     return rv;
  38   }
  39
  40   WidgetEvent* const event = aVisitor.mEvent;
  41   nsCOMPtr<Element> target =
  42       do_QueryInterface(event->GetOriginalDOMEventTarget());
  43   if (nsContentUtils::IsInInteractiveHTMLContent(target, this)) {
  44     return NS_OK;
  45   }
  46
  47   if (event->HasMouseEventMessage()) {
  48     WidgetMouseEvent* mouseEvent = event->AsMouseEvent();
  49
  50     if (mouseEvent->IsLeftClickEvent()) {
  51       RefPtr<HTMLDetailsElement> details = GetDetails();
  52       MOZ_ASSERT(details,
  53                  "Expected to find details since this is the main summary!");
  54
  55       // When dispatching a synthesized mouse click event to a details element
  56       // with 'display: none', both Chrome and Safari do not toggle the 'open'
  57       // attribute. We had tried to be compatible with this behavior, but found
  58       // more inconsistency in test cases in bug 1245424. So we stop doing that.
  59       details->ToggleOpen();
  60       aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
  61       return NS_OK;
  62     }
  63   }  // event->HasMouseEventMessage()
  64
  65   if (event->HasKeyEventMessage() && event->IsTrusted()) {
  66     HandleKeyboardActivation(aVisitor);
  67   }
  68   return rv;
  69 }
  70
  71 bool HTMLSummaryElement::IsHTMLFocusable(IsFocusableFlags aFlags,
  72                                          bool* aIsFocusable,
  73                                          int32_t* aTabIndex) {
  74   bool disallowOverridingFocusability =
  75       nsGenericHTMLElement::IsHTMLFocusable(aFlags, aIsFocusable, aTabIndex);
  76
  77   if (disallowOverridingFocusability || !IsMainSummary()) {
  78     return disallowOverridingFocusability;
  79   }
  80
  81   // The main summary element is focusable.
  82   *aIsFocusable = true;
  83
  84   // Give a chance to allow the subclass to override aIsFocusable.
  85   return false;
  86 }
  87
  88 int32_t HTMLSummaryElement::TabIndexDefault() {
  89   // Make the main summary be able to navigate via tab, and be focusable.
  90   // See nsGenericHTMLElement::IsHTMLFocusable().
  91   return IsMainSummary() ? 0 : nsGenericHTMLElement::TabIndexDefault();
  92 }
  93
  94 bool HTMLSummaryElement::IsMainSummary() const {
  95   HTMLDetailsElement* details = GetDetails();
  96   if (!details) {
  97     return false;
  98   }
  99
 100   return details->GetFirstSummary() == this ||
 101          GetContainingShadow() == details->GetShadowRoot();
 102 }
 103
 104 HTMLDetailsElement* HTMLSummaryElement::GetDetails() const {
 105   if (auto* details = HTMLDetailsElement::FromNodeOrNull(GetParent())) {
 106     return details;
 107   }
 108   if (!HasBeenInUAWidget()) {
 109     return nullptr;
 110   }
 111   return HTMLDetailsElement::FromNodeOrNull(GetContainingShadowHost());
 112 }
 113
 114 JSObject* HTMLSummaryElement::WrapNode(JSContext* aCx,
 115                                        JS::Handle<JSObject*> aGivenProto) {
 116   return HTMLElement_Binding::Wrap(aCx, this, aGivenProto);
 117 }
 118
 119 }  // namespace mozilla::dom