mirror of
https://github.com/classilla/tenfourfox.git
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168 lines
4.4 KiB
C
168 lines
4.4 KiB
C
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/* -*- 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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/**
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* This is the base class for all link classes.
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*/
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#ifndef mozilla_dom_Link_h__
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#define mozilla_dom_Link_h__
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#include "mozilla/IHistory.h"
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#include "mozilla/MemoryReporting.h"
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#include "nsIContent.h" // for nsLinkState
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namespace mozilla {
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class EventStates;
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namespace dom {
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class Element;
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#define MOZILLA_DOM_LINK_IMPLEMENTATION_IID \
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{ 0xb25edee6, 0xdd35, 0x4f8b, \
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{ 0xab, 0x90, 0x66, 0xd0, 0xbd, 0x3c, 0x22, 0xd5 } }
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class Link : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(MOZILLA_DOM_LINK_IMPLEMENTATION_IID)
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/**
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* aElement is the element pointer corresponding to this link.
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*/
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explicit Link(Element* aElement);
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virtual void SetLinkState(nsLinkState aState);
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/**
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* @return NS_EVENT_STATE_VISITED if this link is visited,
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* NS_EVENT_STATE_UNVISTED if this link is not visited, or 0 if this
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* link is not actually a link.
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*/
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EventStates LinkState() const;
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/**
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* @return the URI this link is for, if available.
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*/
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nsIURI* GetURI() const;
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virtual nsIURI* GetURIExternal() const {
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return GetURI();
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}
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/**
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* Helper methods for modifying and obtaining parts of the URI of the Link.
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*/
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void SetProtocol(const nsAString &aProtocol);
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void SetUsername(const nsAString &aUsername);
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void SetPassword(const nsAString &aPassword);
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void SetHost(const nsAString &aHost);
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void SetHostname(const nsAString &aHostname);
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void SetPathname(const nsAString &aPathname);
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void SetSearch(const nsAString &aSearch);
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void SetPort(const nsAString &aPort);
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void SetHash(const nsAString &aHash);
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void GetOrigin(nsAString &aOrigin);
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void GetProtocol(nsAString &_protocol);
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void GetUsername(nsAString &aUsername);
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void GetPassword(nsAString &aPassword);
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void GetHost(nsAString &_host);
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void GetHostname(nsAString &_hostname);
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void GetPathname(nsAString &_pathname);
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void GetSearch(nsAString &_search);
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void GetPort(nsAString &_port);
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void GetHash(nsAString &_hash);
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/**
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* Invalidates any link caching, and resets the state to the default.
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*
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* @param aNotify
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* true if ResetLinkState should notify the owning document about style
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* changes or false if it should not.
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*/
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void ResetLinkState(bool aNotify, bool aHasHref);
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// This method nevers returns a null element.
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Element* GetElement() const { return mElement; }
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/**
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* DNS prefetch has been deferred until later, e.g. page load complete.
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*/
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virtual void OnDNSPrefetchDeferred() { /*do nothing*/ }
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/**
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* DNS prefetch has been submitted to Host Resolver.
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*/
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virtual void OnDNSPrefetchRequested() { /*do nothing*/ }
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/**
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* Checks if DNS Prefetching is ok
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*
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* @returns boolean
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* Defaults to true; should be overridden for specialised cases
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*/
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virtual bool HasDeferredDNSPrefetchRequest() { return true; }
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virtual size_t
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SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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bool ElementHasHref() const;
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void TryDNSPrefetch();
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void CancelDNSPrefetch(nsWrapperCache::FlagsType aDeferredFlag,
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nsWrapperCache::FlagsType aRequestedFlag);
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protected:
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virtual ~Link();
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/**
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* Return true if the link has associated URI.
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*/
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bool HasURI() const
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{
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if (HasCachedURI()) {
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return true;
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}
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return !!GetURI();
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}
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nsIURI* GetCachedURI() const { return mCachedURI; }
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bool HasCachedURI() const { return !!mCachedURI; }
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private:
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/**
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* Unregisters from History so this node no longer gets notifications about
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* changes to visitedness.
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*/
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void UnregisterFromHistory();
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already_AddRefed<nsIURI> GetURIToMutate();
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void SetHrefAttribute(nsIURI *aURI);
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mutable nsCOMPtr<nsIURI> mCachedURI;
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Element * const mElement;
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// Strong reference to History. The link has to unregister before History
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// can disappear.
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nsCOMPtr<IHistory> mHistory;
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uint16_t mLinkState;
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bool mNeedsRegistration;
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bool mRegistered;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(Link, MOZILLA_DOM_LINK_IMPLEMENTATION_IID)
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_Link_h__
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