mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 14:45:29 +00:00
469 lines
13 KiB
C++
469 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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/HTMLAnchorElement.h"
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#include "mozilla/dom/HTMLAnchorElementBinding.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/MemoryReporting.h"
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#include "nsCOMPtr.h"
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#include "nsContentUtils.h"
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#include "nsGkAtoms.h"
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#include "nsHTMLDNSPrefetch.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsPresContext.h"
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#include "nsIURI.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(Anchor)
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namespace mozilla {
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namespace dom {
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#define ANCHOR_ELEMENT_FLAG_BIT(n_) NODE_FLAG_BIT(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
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// Anchor element specific bits
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enum {
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// Indicates that a DNS Prefetch has been requested from this Anchor elem
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HTML_ANCHOR_DNS_PREFETCH_REQUESTED = ANCHOR_ELEMENT_FLAG_BIT(0),
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// Indicates that a DNS Prefetch was added to the deferral queue
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HTML_ANCHOR_DNS_PREFETCH_DEFERRED = ANCHOR_ELEMENT_FLAG_BIT(1)
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};
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ASSERT_NODE_FLAGS_SPACE(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 2);
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#undef ANCHOR_ELEMENT_FLAG_BIT
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HTMLAnchorElement::~HTMLAnchorElement()
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{
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}
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLAnchorElement)
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NS_INTERFACE_TABLE_INHERITED(HTMLAnchorElement,
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nsIDOMHTMLAnchorElement,
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Link)
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NS_INTERFACE_TABLE_TAIL_INHERITING(nsGenericHTMLElement)
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NS_IMPL_ADDREF_INHERITED(HTMLAnchorElement, Element)
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NS_IMPL_RELEASE_INHERITED(HTMLAnchorElement, Element)
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NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLAnchorElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLAnchorElement,
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nsGenericHTMLElement)
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tmp->Link::Traverse(cb);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRelList)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLAnchorElement,
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nsGenericHTMLElement)
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tmp->Link::Unlink();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mRelList)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_ELEMENT_CLONE(HTMLAnchorElement)
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JSObject*
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HTMLAnchorElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HTMLAnchorElementBinding::Wrap(aCx, this, aGivenProto);
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}
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Charset, charset)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Coords, coords)
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NS_IMPL_URI_ATTR(HTMLAnchorElement, Href, href)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Hreflang, hreflang)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Name, name)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Rel, rel)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Rev, rev)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Shape, shape)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Type, type)
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NS_IMPL_STRING_ATTR(HTMLAnchorElement, Download, download)
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int32_t
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HTMLAnchorElement::TabIndexDefault()
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{
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return 0;
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}
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void
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HTMLAnchorElement::GetItemValueText(DOMString& aValue)
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{
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GetHref(aValue);
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}
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void
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HTMLAnchorElement::SetItemValueText(const nsAString& aValue)
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{
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SetHref(aValue);
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}
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bool
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HTMLAnchorElement::Draggable() const
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{
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// links can be dragged as long as there is an href and the
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// draggable attribute isn't false
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if (!HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
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// no href, so just use the same behavior as other elements
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return nsGenericHTMLElement::Draggable();
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}
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return !AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
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nsGkAtoms::_false, eIgnoreCase);
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}
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void
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HTMLAnchorElement::OnDNSPrefetchRequested()
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{
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UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
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SetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
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}
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void
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HTMLAnchorElement::OnDNSPrefetchDeferred()
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{
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UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
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SetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
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}
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bool
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HTMLAnchorElement::HasDeferredDNSPrefetchRequest()
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{
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return HasFlag(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
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}
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nsresult
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HTMLAnchorElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers)
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{
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Link::ResetLinkState(false, Link::ElementHasHref());
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nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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// Prefetch links
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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doc->RegisterPendingLinkUpdate(this);
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if (nsHTMLDNSPrefetch::IsAllowed(OwnerDoc())) {
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nsHTMLDNSPrefetch::PrefetchLow(this);
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}
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}
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return rv;
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}
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void
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HTMLAnchorElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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// Cancel any DNS prefetches
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// Note: Must come before ResetLinkState. If called after, it will recreate
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// mCachedURI based on data that is invalid - due to a call to GetHostname.
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// If prefetch was deferred, clear flag and move on
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if (HasFlag(HTML_ANCHOR_DNS_PREFETCH_DEFERRED))
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UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
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// Else if prefetch was requested, clear flag and send cancellation
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else if (HasFlag(HTML_ANCHOR_DNS_PREFETCH_REQUESTED)) {
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UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
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// Possible that hostname could have changed since binding, but since this
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// covers common cases, most DNS prefetch requests will be canceled
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nsHTMLDNSPrefetch::CancelPrefetchLow(this, NS_ERROR_ABORT);
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}
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// If this link is ever reinserted into a document, it might
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// be under a different xml:base, so forget the cached state now.
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Link::ResetLinkState(false, Link::ElementHasHref());
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// Note, we need to use OwnerDoc() here, since GetComposedDoc() might
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// return null.
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nsIDocument* doc = OwnerDoc();
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if (doc) {
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doc->UnregisterPendingLinkUpdate(this);
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}
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nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
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}
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static bool
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IsNodeInEditableRegion(nsINode* aNode)
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{
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while (aNode) {
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if (aNode->IsEditable()) {
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return true;
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}
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aNode = aNode->GetParent();
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}
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return false;
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}
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bool
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HTMLAnchorElement::IsHTMLFocusable(bool aWithMouse,
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bool *aIsFocusable, int32_t *aTabIndex)
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{
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if (nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable, aTabIndex)) {
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return true;
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}
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// cannot focus links if there is no link handler
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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nsIPresShell* presShell = doc->GetShell();
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if (presShell) {
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nsPresContext* presContext = presShell->GetPresContext();
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if (presContext && !presContext->GetLinkHandler()) {
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*aIsFocusable = false;
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return false;
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}
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}
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}
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// Links that are in an editable region should never be focusable, even if
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// they are in a contenteditable="false" region.
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if (IsNodeInEditableRegion(this)) {
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if (aTabIndex) {
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*aTabIndex = -1;
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}
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*aIsFocusable = false;
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return true;
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}
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if (!HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
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// check whether we're actually a link
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if (!Link::HasURI()) {
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// Not tabbable or focusable without href (bug 17605), unless
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// forced to be via presence of nonnegative tabindex attribute
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if (aTabIndex) {
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*aTabIndex = -1;
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}
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*aIsFocusable = false;
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return false;
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}
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}
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if (aTabIndex && (sTabFocusModel & eTabFocus_linksMask) == 0) {
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*aTabIndex = -1;
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}
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*aIsFocusable = true;
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return false;
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}
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nsresult
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HTMLAnchorElement::PreHandleEvent(EventChainPreVisitor& aVisitor)
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{
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return PreHandleEventForAnchors(aVisitor);
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}
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nsresult
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HTMLAnchorElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
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{
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return PostHandleEventForAnchors(aVisitor);
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}
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bool
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HTMLAnchorElement::IsLink(nsIURI** aURI) const
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{
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return IsHTMLLink(aURI);
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}
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void
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HTMLAnchorElement::GetLinkTarget(nsAString& aTarget)
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{
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GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
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if (aTarget.IsEmpty()) {
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GetBaseTarget(aTarget);
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}
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}
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NS_IMETHODIMP
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HTMLAnchorElement::GetTarget(nsAString& aValue)
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{
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if (!GetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue)) {
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GetBaseTarget(aValue);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLAnchorElement::SetTarget(const nsAString& aValue)
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{
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return SetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue, true);
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}
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nsDOMTokenList*
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HTMLAnchorElement::RelList()
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{
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if (!mRelList) {
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mRelList = new nsDOMTokenList(this, nsGkAtoms::rel);
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}
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return mRelList;
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}
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#define IMPL_URI_PART(_part) \
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NS_IMETHODIMP \
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HTMLAnchorElement::Get##_part(nsAString& a##_part) \
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{ \
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ErrorResult rv; \
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Link::Get##_part(a##_part, rv); \
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MOZ_ASSERT(!rv.Failed()); \
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return NS_OK; \
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} \
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NS_IMETHODIMP \
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HTMLAnchorElement::Set##_part(const nsAString& a##_part) \
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{ \
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ErrorResult rv; \
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Link::Set##_part(a##_part, rv); \
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MOZ_ASSERT(!rv.Failed()); \
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return NS_OK; \
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}
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IMPL_URI_PART(Protocol)
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IMPL_URI_PART(Host)
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IMPL_URI_PART(Hostname)
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IMPL_URI_PART(Pathname)
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IMPL_URI_PART(Search)
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IMPL_URI_PART(Port)
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IMPL_URI_PART(Hash)
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#undef IMPL_URI_PART
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NS_IMETHODIMP
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HTMLAnchorElement::GetText(nsAString& aText)
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{
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if(!nsContentUtils::GetNodeTextContent(this, true, aText, fallible)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLAnchorElement::SetText(const nsAString& aText)
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{
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return nsContentUtils::SetNodeTextContent(this, aText, false);
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}
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NS_IMETHODIMP
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HTMLAnchorElement::ToString(nsAString& aSource)
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{
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return GetHref(aSource);
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}
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NS_IMETHODIMP
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HTMLAnchorElement::GetPing(nsAString& aValue)
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{
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return GetURIListAttr(nsGkAtoms::ping, aValue);
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}
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NS_IMETHODIMP
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HTMLAnchorElement::SetPing(const nsAString& aValue)
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{
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return SetAttr(kNameSpaceID_None, nsGkAtoms::ping, aValue, true);
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}
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already_AddRefed<nsIURI>
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HTMLAnchorElement::GetHrefURI() const
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{
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nsCOMPtr<nsIURI> uri = Link::GetCachedURI();
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if (uri) {
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return uri.forget();
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}
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return GetHrefURIForAnchors();
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}
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nsresult
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HTMLAnchorElement::SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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nsIAtom* aPrefix, const nsAString& aValue,
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bool aNotify)
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{
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bool reset = false;
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if (aName == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID) {
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// If we do not have a cached URI, we have some value here so we must reset
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// our link state after calling the parent.
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if (!Link::HasCachedURI()) {
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reset = true;
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}
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// However, if we have a cached URI, we'll want to see if the value changed.
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else {
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nsAutoString val;
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GetHref(val);
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if (!val.Equals(aValue)) {
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reset = true;
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}
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}
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}
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nsresult rv = nsGenericHTMLElement::SetAttr(aNameSpaceID, aName, aPrefix,
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aValue, aNotify);
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// The ordering of the parent class's SetAttr call and Link::ResetLinkState
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// is important here! The attribute is not set until SetAttr returns, and
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// we will need the updated attribute value because notifying the document
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// that content states have changed will call IntrinsicState, which will try
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// to get updated information about the visitedness from Link.
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if (reset) {
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Link::ResetLinkState(!!aNotify, true);
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}
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return rv;
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}
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nsresult
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HTMLAnchorElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
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bool aNotify)
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{
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nsresult rv = nsGenericHTMLElement::UnsetAttr(aNameSpaceID, aAttribute,
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aNotify);
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// The ordering of the parent class's UnsetAttr call and Link::ResetLinkState
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// is important here! The attribute is not unset until UnsetAttr returns, and
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// we will need the updated attribute value because notifying the document
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// that content states have changed will call IntrinsicState, which will try
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// to get updated information about the visitedness from Link.
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if (aAttribute == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID) {
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Link::ResetLinkState(!!aNotify, false);
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}
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return rv;
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}
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bool
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HTMLAnchorElement::ParseAttribute(int32_t aNamespaceID,
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nsIAtom* aAttribute,
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const nsAString& aValue,
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nsAttrValue& aResult)
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{
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return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aResult);
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}
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EventStates
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HTMLAnchorElement::IntrinsicState() const
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{
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return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
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}
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size_t
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HTMLAnchorElement::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
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{
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return nsGenericHTMLElement::SizeOfExcludingThis(aMallocSizeOf) +
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Link::SizeOfExcludingThis(aMallocSizeOf);
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}
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} // namespace mozilla
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} // namespace dom
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