gecko-dev/dom/html/HTMLPictureElement.cpp

113 строки
3.5 KiB
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/HTMLPictureElement.h"
#include "mozilla/dom/HTMLPictureElementBinding.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/Preferences.h"
static const char *kPrefPictureEnabled = "dom.image.picture.enabled";
// Expand NS_IMPL_NS_NEW_HTML_ELEMENT(Picture) to add pref check.
nsGenericHTMLElement*
NS_NewHTMLPictureElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
mozilla::dom::FromParser aFromParser)
{
if (!mozilla::dom::HTMLPictureElement::IsPictureEnabled()) {
return new mozilla::dom::HTMLUnknownElement(aNodeInfo);
}
return new mozilla::dom::HTMLPictureElement(aNodeInfo);
}
namespace mozilla {
namespace dom {
HTMLPictureElement::HTMLPictureElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: nsGenericHTMLElement(aNodeInfo)
{
}
HTMLPictureElement::~HTMLPictureElement()
{
}
NS_IMPL_ISUPPORTS_INHERITED(HTMLPictureElement, nsGenericHTMLElement,
nsIDOMHTMLPictureElement)
NS_IMPL_ELEMENT_CLONE(HTMLPictureElement)
void
HTMLPictureElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
{
nsCOMPtr<nsIContent> child = GetChildAt(aIndex);
if (child && child->IsHTMLElement(nsGkAtoms::img)) {
HTMLImageElement* img = HTMLImageElement::FromContent(child);
if (img) {
img->PictureSourceRemoved(child->AsContent());
}
} else if (child && child->IsHTMLElement(nsGkAtoms::source)) {
// Find all img siblings after this <source> to notify them of its demise
nsCOMPtr<nsIContent> nextSibling = child->GetNextSibling();
if (nextSibling && nextSibling->GetParentNode() == this) {
do {
HTMLImageElement* img = HTMLImageElement::FromContent(nextSibling);
if (img) {
img->PictureSourceRemoved(child->AsContent());
}
} while ( (nextSibling = nextSibling->GetNextSibling()) );
}
}
nsGenericHTMLElement::RemoveChildAt(aIndex, aNotify);
}
nsresult
HTMLPictureElement::InsertChildAt(nsIContent* aKid, uint32_t aIndex, bool aNotify)
{
nsresult rv = nsGenericHTMLElement::InsertChildAt(aKid, aIndex, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(aKid, rv);
if (aKid->IsHTMLElement(nsGkAtoms::img)) {
HTMLImageElement* img = HTMLImageElement::FromContent(aKid);
if (img) {
img->PictureSourceAdded(aKid->AsContent());
}
} else if (aKid->IsHTMLElement(nsGkAtoms::source)) {
// Find all img siblings after this <source> to notify them of its insertion
nsCOMPtr<nsIContent> nextSibling = aKid->GetNextSibling();
if (nextSibling && nextSibling->GetParentNode() == this) {
do {
HTMLImageElement* img = HTMLImageElement::FromContent(nextSibling);
if (img) {
img->PictureSourceAdded(aKid->AsContent());
}
} while ( (nextSibling = nextSibling->GetNextSibling()) );
}
}
return rv;
}
bool
HTMLPictureElement::IsPictureEnabled()
{
return HTMLImageElement::IsSrcsetEnabled() &&
Preferences::GetBool(kPrefPictureEnabled, false);
}
JSObject*
HTMLPictureElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return HTMLPictureElementBinding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla