d50718f5d2
All the SizeOf{In,Ex}cludingThis() functions take a MallocSizeOf function
which measures memory blocks. This patch introduces a new type, SizeOfState,
which includes a MallocSizeOf function *and* a table of already-measured
pointers, called SeenPtrs. This gives us a general mechanism to measure
graph-like data structures, by recording which nodes have already been
measured. (This approach is used in a number of existing reporters, but not in
a uniform fashion.)
The patch also converts the window memory reporting to use SizeOfState in a lot
of places, all the way through to the measurement of Elements. This is a
precursor for bug 1383977 which will measure Stylo elements, which involve
Arcs.
The patch also converts the existing mAlreadyMeasuredOrphanTrees table in the
OrphanReporter to use the new mechanism.
417 lines
11 KiB
C++
417 lines
11 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 "nsAttrValueOrString.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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// static
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const DOMTokenListSupportedToken HTMLAnchorElement::sSupportedRelValues[] = {
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"noreferrer",
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"noopener",
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nullptr
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};
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HTMLAnchorElement::~HTMLAnchorElement()
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{
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}
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bool
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HTMLAnchorElement::IsInteractiveHTMLContent(bool aIgnoreTabindex) const
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{
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return HasAttr(kNameSpaceID_None, nsGkAtoms::href) ||
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nsGenericHTMLElement::IsInteractiveHTMLContent(aIgnoreTabindex);
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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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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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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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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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TryDNSPrefetch();
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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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CancelDNSPrefetch(HTML_ANCHOR_DNS_PREFETCH_DEFERRED,
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HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
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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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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::GetEventTargetParent(EventChainPreVisitor& aVisitor)
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{
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return GetEventTargetParentForAnchors(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, sSupportedRelValues);
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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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Link::Get##_part(a##_part); \
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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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Link::Set##_part(a##_part); \
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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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GetAttr(kNameSpaceID_None, nsGkAtoms::ping, aValue);
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return NS_OK;
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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::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValueOrString* aValue,
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bool aNotify)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aName == nsGkAtoms::href) {
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CancelDNSPrefetch(HTML_ANCHOR_DNS_PREFETCH_DEFERRED,
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HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
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}
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}
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return nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName, aValue,
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aNotify);
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}
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nsresult
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HTMLAnchorElement::AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue, bool aNotify)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aName == nsGkAtoms::href) {
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Link::ResetLinkState(aNotify, !!aValue);
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if (aValue && IsInComposedDoc()) {
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TryDNSPrefetch();
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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, aOldValue, aNotify);
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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::SizeOfState& aState) const
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{
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return nsGenericHTMLElement::SizeOfExcludingThis(aState) +
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Link::SizeOfExcludingThis(aState);
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}
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} // namespace dom
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} // namespace mozilla
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