Quelle HTMLMarqueeElement.cpp Sprache: C

/* -*- 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/HTMLMarqueeElement.h"
#include "nsGenericHTMLElement.h"
#include "nsStyleConsts.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/dom/HTMLMarqueeElementBinding.h"
#include "mozilla/dom/CustomEvent.h"
// This is to pick up the definition of FunctionStringCallback:
#include "mozilla/dom/DataTransferItemBinding.h"
#include "mozilla/dom/ShadowRoot.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(Marquee)

namespace mozilla::dom {

HTMLMarqueeElement::~HTMLMarqueeElement() = default;

NS_IMPL_ELEMENT_CLONE(HTMLMarqueeElement)

static const nsAttrValue::EnumTable kBehaviorTable[] = {
    {"scroll", 1}, {"slide", 2}, {"alternate", 3}, {nullptr, 0}};

// Default behavior value is "scroll".
static const nsAttrValue::EnumTable* kDefaultBehavior = &kBehaviorTable[0];

static const nsAttrValue::EnumTable kDirectionTable[] = {
    {"left", 1}, {"right", 2}, {"up", 3}, {"down", 4}, {nullptr, 0}};

// Default direction value is "left".
static const nsAttrValue::EnumTable* kDefaultDirection = &kDirectionTable[0];

JSObject* HTMLMarqueeElement::WrapNode(JSContext* aCx,
                                       JS::Handle<JSObject*> aGivenProto) {
  return dom::HTMLMarqueeElement_Binding::Wrap(aCx, this, aGivenProto);
}

nsresult HTMLMarqueeElement::BindToTree(BindContext& aContext,
                                        nsINode& aParent) {
  nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
  NS_ENSURE_SUCCESS(rv, rv);

  if (IsInComposedDoc()) {
    AttachAndSetUAShadowRoot();
  }

  return rv;
}

void HTMLMarqueeElement::UnbindFromTree(UnbindContext& aContext) {
  if (IsInComposedDoc()) {
    // We don't want to unattach the shadow root because it used to
    // contain a <slot>.
    NotifyUAWidgetTeardown(UnattachShadowRoot::No);
  }

  nsGenericHTMLElement::UnbindFromTree(aContext);
}

void HTMLMarqueeElement::GetBehavior(nsAString& aValue) {
  GetEnumAttr(nsGkAtoms::behavior, kDefaultBehavior->tag, aValue);
}

void HTMLMarqueeElement::GetDirection(nsAString& aValue) {
  GetEnumAttr(nsGkAtoms::direction, kDefaultDirection->tag, aValue);
}

bool HTMLMarqueeElement::ParseAttribute(int32_t aNamespaceID,
                                        nsAtom* aAttribute,
                                        const nsAString& aValue,
                                        nsIPrincipal* aMaybeScriptedPrincipal,
                                        nsAttrValue& aResult) {
  if (aNamespaceID == kNameSpaceID_None) {
    if ((aAttribute == nsGkAtoms::width) || (aAttribute == nsGkAtoms::height)) {
      return aResult.ParseHTMLDimension(aValue);
    }
    if (aAttribute == nsGkAtoms::bgcolor) {
      return aResult.ParseColor(aValue);
    }
    if (aAttribute == nsGkAtoms::behavior) {
      return aResult.ParseEnumValue(aValue, kBehaviorTable, false,
                                    kDefaultBehavior);
    }
    if (aAttribute == nsGkAtoms::direction) {
      return aResult.ParseEnumValue(aValue, kDirectionTable, false,
                                    kDefaultDirection);
    }
    if (aAttribute == nsGkAtoms::hspace || aAttribute == nsGkAtoms::vspace) {
      return aResult.ParseHTMLDimension(aValue);
    }

    if (aAttribute == nsGkAtoms::loop) {
      return aResult.ParseIntValue(aValue);
    }

    if (aAttribute == nsGkAtoms::scrollamount ||
        aAttribute == nsGkAtoms::scrolldelay) {
      return aResult.ParseNonNegativeIntValue(aValue);
    }
  }

  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
                                              aMaybeScriptedPrincipal, aResult);
}

void HTMLMarqueeElement::MapAttributesIntoRule(
    MappedDeclarationsBuilder& aBuilder) {
  nsGenericHTMLElement::MapImageMarginAttributeInto(aBuilder);
  nsGenericHTMLElement::MapImageSizeAttributesInto(aBuilder);
  nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
  nsGenericHTMLElement::MapBGColorInto(aBuilder);
}

NS_IMETHODIMP_(bool)
HTMLMarqueeElement::IsAttributeMapped(const nsAtom* aAttribute) const {
  static const MappedAttributeEntry* const map[] = {
      sImageMarginSizeAttributeMap, sBackgroundColorAttributeMap,
      sCommonAttributeMap};
  return FindAttributeDependence(aAttribute, map);
}

nsMapRuleToAttributesFunc HTMLMarqueeElement::GetAttributeMappingFunction()
    const {
  return &MapAttributesIntoRule;
}

void HTMLMarqueeElement::DispatchEventToShadowRoot(
    const nsAString& aEventTypeArg) {
  // Dispatch the event to the UA Widget Shadow Root, make it inaccessible to
  // document.
  RefPtr<nsINode> shadow = GetShadowRoot();
  MOZ_ASSERT(shadow);
  RefPtr<Event> event = new Event(shadow, nullptr, nullptr);
  event->InitEvent(aEventTypeArg, false, false);
  event->SetTrusted(true);
  shadow->DispatchEvent(*event, IgnoreErrors());
}

void HTMLMarqueeElement::Start() {
  if (GetShadowRoot()) {
    DispatchEventToShadowRoot(u"marquee-start"_ns);
  }
}

void HTMLMarqueeElement::Stop() {
  if (GetShadowRoot()) {
    DispatchEventToShadowRoot(u"marquee-stop"_ns);
  }
}

}  // namespace mozilla::dom

quality100%

¤ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.