nsChromeRegistry.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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/. */

#ifndef nsChromeRegistry_h

#define nsChromeRegistry_h

#include "nsIToolkitChromeRegistry.h"

#include "nsIObserver.h"

#include "nsWeakReference.h"

#include "nsString.h"

#include "nsURIHashKey.h"

#include "nsInterfaceHashtable.h"

#include "nsXULAppAPI.h"

#include "mozilla/FileLocation.h"

#include "mozilla/intl/LocaleService.h"

class nsPIDOMWindowOuter;

class nsIPrefBranch;

class nsIURL;

// The chrome registry is actually split between nsChromeRegistryChrome and

// nsChromeRegistryContent. The work/data that is common to both resides in

// the shared nsChromeRegistry implementation, with operations that only make

// sense for one side erroring out in the other.

// for component registration

// {47049e42-1d87-482a-984d-56ae185e367a}

#define NS_CHROMEREGISTRY_CID                        \

  {                                                  \

    0x47049e42, 0x1d87, 0x482a, {                    \

      0x98, 0x4d, 0x56, 0xae, 0x18, 0x5e, 0x36, 0x7a \

    }                                                \

class nsChromeRegistry : public nsIToolkitChromeRegistry,

                         public nsIObserver,

                         public nsSupportsWeakReference {

 public:

  NS_DECL_ISUPPORTS

  // nsIXULChromeRegistry methods:

  NS_IMETHOD AllowScriptsForPackage(nsIURI* url, bool* _retval) override;

  NS_IMETHOD AllowContentToAccess(nsIURI* url, bool* _retval) override;

  NS_IMETHOD CanLoadURLRemotely(nsIURI* url, bool* _retval) override;

  NS_IMETHOD MustLoadURLRemotely(nsIURI* url, bool* _retval) override;

  NS_IMETHOD ConvertChromeURL(nsIURI* aChromeURI, nsIURI** aResult) override;

  // nsChromeRegistry methods:

  nsChromeRegistry() : mInitialized(false) {}

  virtual nsresult Init();

  static already_AddRefed<nsIChromeRegistry> GetService();

  static nsChromeRegistry* gChromeRegistry;

  // This method can change its parameter, so due to thread safety issues

  // it should only be called for nsCOMPtr<nsIURI> that is on the stack,

  // unless you know what you are doing.

  static nsresult Canonify(nsCOMPtr<nsIURI>& aChromeURL);

 protected:

  virtual ~nsChromeRegistry();

  void FlushSkinCaches();

  void FlushAllCaches();

  static void LogMessage(const char* aMsg, ...) MOZ_FORMAT_PRINTF(1, 2);

  static void LogMessageWithContext(nsIURI* aURL, uint32_t aLineNumber,

                                    uint32_t flags, const char* aMsg, ...)

      MOZ_FORMAT_PRINTF(4, 5);

  virtual nsIURI* GetBaseURIFromPackage(const nsCString& aPackage,

                                        const nsCString& aProvider,

                                        const nsCString& aPath) = 0;

  virtual nsresult GetFlagsFromPackage(const nsCString& aPackage,

                                       uint32_t* aFlags) = 0;

  static nsresult RefreshWindow(nsPIDOMWindowOuter* aWindow);

  static nsresult GetProviderAndPath(nsIURI* aChromeURL, nsACString& aProvider,

                                     nsACString& aPath);

 public:

  static already_AddRefed<nsChromeRegistry> GetSingleton();

  struct ManifestProcessingContext {

    ManifestProcessingContext(NSLocationType aType,

                              mozilla::FileLocation& aFile)

        : mType(aType), mFile(aFile) {}

    ~ManifestProcessingContext() {}

    nsIURI* GetManifestURI();

    already_AddRefed<nsIURI> ResolveURI(const char* uri);

    NSLocationType mType;

    mozilla::FileLocation mFile;

    nsCOMPtr<nsIURI> mManifestURI;

};

  virtual void ManifestContent(ManifestProcessingContext& cx, int lineno,

                               char* const* argv, int flags) = 0;

  virtual void ManifestLocale(ManifestProcessingContext& cx, int lineno,

                              char* const* argv, int flags) = 0;

  virtual void ManifestSkin(ManifestProcessingContext& cx, int lineno,

                            char* const* argv, int flags) = 0;

  virtual void ManifestOverride(ManifestProcessingContext& cx, int lineno,

                                char* const* argv, int flags) = 0;

  virtual void ManifestResource(ManifestProcessingContext& cx, int lineno,

                                char* const* argv, int flags) = 0;

  // Available flags

  enum {

    // This package should use the new XPCNativeWrappers to separate

    // content from chrome. This flag is currently unused (because we call

    // into xpconnect at registration time).

    XPCNATIVEWRAPPERS = 1 << 1,

    // Content script may access files in this package

    CONTENT_ACCESSIBLE = 1 << 2,

    // Package may be loaded remotely

    REMOTE_ALLOWED = 1 << 3,

    // Package must be loaded remotely

    REMOTE_REQUIRED = 1 << 4,

};

  bool mInitialized;

  // "Override" table (chrome URI string -> real URI)

  nsInterfaceHashtable<nsURIHashKey, nsIURI> mOverrideTable;

};

#endif  // nsChromeRegistry_h