зеркало из https://github.com/mozilla/gecko-dev.git
153 строки
4.8 KiB
C++
153 строки
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/HTMLSourceElement.h"
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#include "mozilla/dom/HTMLSourceElementBinding.h"
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#include "mozilla/dom/HTMLImageElement.h"
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#include "mozilla/dom/ResponsiveImageSelector.h"
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#include "nsGkAtoms.h"
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#include "nsIMediaList.h"
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#include "nsCSSParser.h"
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#include "mozilla/Preferences.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(Source)
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namespace mozilla {
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namespace dom {
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HTMLSourceElement::HTMLSourceElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: nsGenericHTMLElement(aNodeInfo)
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{
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}
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HTMLSourceElement::~HTMLSourceElement()
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{
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}
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NS_IMPL_ISUPPORTS_INHERITED(HTMLSourceElement, nsGenericHTMLElement,
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nsIDOMHTMLSourceElement)
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NS_IMPL_ELEMENT_CLONE(HTMLSourceElement)
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NS_IMPL_URI_ATTR(HTMLSourceElement, Src, src)
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NS_IMPL_STRING_ATTR(HTMLSourceElement, Type, type)
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NS_IMPL_STRING_ATTR(HTMLSourceElement, Srcset, srcset)
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NS_IMPL_STRING_ATTR(HTMLSourceElement, Sizes, sizes)
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NS_IMPL_STRING_ATTR(HTMLSourceElement, Media, media)
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bool
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HTMLSourceElement::MatchesCurrentMedia()
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{
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if (mMediaList) {
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nsIPresShell* presShell = OwnerDoc()->GetShell();
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nsPresContext* pctx = presShell ? presShell->GetPresContext() : nullptr;
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return pctx && mMediaList->Matches(pctx, nullptr);
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}
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// No media specified
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return true;
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}
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nsresult
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HTMLSourceElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValue* aValue, bool aNotify)
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{
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// If we are associated with a <picture> with a valid <img>, notify it of
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// responsive parameter changes
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nsINode *parent = nsINode::GetParentNode();
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if (aNameSpaceID == kNameSpaceID_None &&
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(aName == nsGkAtoms::srcset ||
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aName == nsGkAtoms::sizes ||
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aName == nsGkAtoms::media ||
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aName == nsGkAtoms::type) &&
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parent && parent->Tag() == nsGkAtoms::picture) {
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nsString strVal = aValue ? aValue->GetStringValue() : EmptyString();
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// Find all img siblings after this <source> and notify them of the change
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nsCOMPtr<nsINode> sibling = AsContent();
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while ( (sibling = sibling->GetNextSibling()) ) {
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if (sibling->Tag() == nsGkAtoms::img) {
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HTMLImageElement *img = static_cast<HTMLImageElement*>(sibling.get());
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if (aName == nsGkAtoms::srcset) {
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img->PictureSourceSrcsetChanged(AsContent(), strVal, aNotify);
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} else if (aName == nsGkAtoms::sizes) {
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img->PictureSourceSizesChanged(AsContent(), strVal, aNotify);
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} else if (aName == nsGkAtoms::media ||
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aName == nsGkAtoms::type) {
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img->PictureSourceMediaOrTypeChanged(AsContent(), aNotify);
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}
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}
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}
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} else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::media) {
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mMediaList = nullptr;
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if (aValue) {
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nsString mediaStr = aValue->GetStringValue();
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if (!mediaStr.IsEmpty()) {
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nsCSSParser cssParser;
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mMediaList = new nsMediaList();
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cssParser.ParseMediaList(mediaStr, nullptr, 0, mMediaList, false);
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}
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}
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}
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return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName,
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aValue, aNotify);
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}
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void
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HTMLSourceElement::GetItemValueText(nsAString& aValue)
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{
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GetSrc(aValue);
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}
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void
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HTMLSourceElement::SetItemValueText(const nsAString& aValue)
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{
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SetSrc(aValue);
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}
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nsresult
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HTMLSourceElement::BindToTree(nsIDocument *aDocument,
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nsIContent *aParent,
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nsIContent *aBindingParent,
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bool aCompileEventHandlers)
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{
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nsresult rv = nsGenericHTMLElement::BindToTree(aDocument,
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aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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if (aParent && aParent->IsNodeOfType(nsINode::eMEDIA)) {
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HTMLMediaElement* media = static_cast<HTMLMediaElement*>(aParent);
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media->NotifyAddedSource();
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} else if (aParent && aParent->Tag() == nsGkAtoms::picture) {
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// Find any img siblings after this <source> and notify them
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nsCOMPtr<nsINode> sibling = AsContent();
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while ( (sibling = sibling->GetNextSibling()) ) {
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if (sibling->Tag() == nsGkAtoms::img) {
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HTMLImageElement *img = static_cast<HTMLImageElement*>(sibling.get());
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img->PictureSourceAdded(AsContent());
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}
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}
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}
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return NS_OK;
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}
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JSObject*
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HTMLSourceElement::WrapNode(JSContext* aCx)
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{
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return HTMLSourceElementBinding::Wrap(aCx, this);
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}
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} // namespace dom
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} // namespace mozilla
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