зеркало из https://github.com/mozilla/pjs.git
252 строки
8.6 KiB
C++
252 строки
8.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is
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* Zero-Knowledge Systems, Inc.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Timothy Watt <riceman+moz@mail.rit.edu>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* Utility routines for checking content load/process policy settings,
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* and routines helpful for content policy implementors.
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*/
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#ifndef __nsContentPolicyUtils_h__
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#define __nsContentPolicyUtils_h__
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// for PR_LOGGING
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#include "prlog.h"
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#include "nsIContentPolicy.h"
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#include "nsIServiceManager.h"
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#include "nsIContent.h"
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//XXXtw sadly, this makes consumers of nsContentPolicyUtils depend on widget
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#include "nsIDocument.h"
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#include "nsPIDOMWindow.h"
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class nsACString;
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#define NS_CONTENTPOLICY_CONTRACTID "@mozilla.org/layout/content-policy;1"
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#define NS_CONTENTPOLICY_CATEGORY "content-policy"
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#define NS_CONTENTPOLICY_CID \
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{0x0e3afd3d, 0xeb60, 0x4c2b, \
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{ 0x96, 0x3b, 0x56, 0xd7, 0xc4, 0x39, 0xf1, 0x24 }}
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/**
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* Evaluates to true if val is ACCEPT.
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*
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* @param val the status returned from shouldProcess/shouldLoad
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*/
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#define NS_CP_ACCEPTED(val) ((val) == nsIContentPolicy::ACCEPT)
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/**
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* Evaluates to true if val is a REJECT_* status
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*
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* @param val the status returned from shouldProcess/shouldLoad
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*/
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#define NS_CP_REJECTED(val) ((val) != nsIContentPolicy::ACCEPT)
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// Offer convenient translations of constants -> const char*
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// convenience macro to reduce some repetative typing...
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// name is the name of a constant from this interface
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#define CASE_RETURN(name) \
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case nsIContentPolicy:: name : \
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return #name
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#ifdef PR_LOGGING
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/**
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* Returns a string corresponding to the name of the response constant, or
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* "<Unknown Response>" if an unknown response value is given.
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*
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* The return value is static and must not be freed.
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*
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* @param response the response code
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* @return the name of the given response code
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*/
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inline const char *
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NS_CP_ResponseName(PRInt16 response)
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{
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switch (response) {
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CASE_RETURN( REJECT_REQUEST );
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CASE_RETURN( REJECT_TYPE );
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CASE_RETURN( REJECT_SERVER );
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CASE_RETURN( REJECT_OTHER );
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CASE_RETURN( ACCEPT );
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default:
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return "<Unknown Response>";
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}
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}
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/**
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* Returns a string corresponding to the name of the content type constant, or
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* "<Unknown Type>" if an unknown content type value is given.
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*
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* The return value is static and must not be freed.
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*
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* @param contentType the content type code
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* @return the name of the given content type code
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*/
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inline const char *
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NS_CP_ContentTypeName(PRUint32 contentType)
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{
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switch (contentType) {
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CASE_RETURN( TYPE_OTHER );
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CASE_RETURN( TYPE_SCRIPT );
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CASE_RETURN( TYPE_IMAGE );
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CASE_RETURN( TYPE_STYLESHEET );
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CASE_RETURN( TYPE_OBJECT );
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CASE_RETURN( TYPE_DOCUMENT );
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CASE_RETURN( TYPE_SUBDOCUMENT);
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CASE_RETURN( TYPE_REFRESH );
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default:
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return "<Unknown Type>";
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}
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}
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#endif // defined(PR_LOGGING)
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#undef CASE_RETURN
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/* Passes on parameters from its "caller"'s context. */
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#define CHECK_CONTENT_POLICY(action) \
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PR_BEGIN_MACRO \
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nsCOMPtr<nsIContentPolicy> policy = \
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do_GetService(NS_CONTENTPOLICY_CONTRACTID); \
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if (!policy) \
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return NS_ERROR_FAILURE; \
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\
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return policy-> action (contentType, contentLocation, requestOrigin, \
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context, mimeType, extra, decision); \
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PR_END_MACRO
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/* Passes on parameters from its "caller"'s context. */
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#define CHECK_CONTENT_POLICY_WITH_SERVICE(action, _policy) \
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PR_BEGIN_MACRO \
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return _policy-> action (contentType, contentLocation, requestOrigin, \
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context, mimeType, extra, decision); \
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PR_END_MACRO
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/**
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* Alias for calling ShouldLoad on the content policy service.
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* Parameters are the same as nsIContentPolicy::shouldLoad, except for
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* the last parameter, which can be used to pass in a pointer to the
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* service if the caller already has one.
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*/
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inline nsresult
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NS_CheckContentLoadPolicy(PRUint32 contentType,
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nsIURI *contentLocation,
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nsIURI *requestOrigin,
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nsISupports *context,
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const nsACString &mimeType,
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nsISupports *extra,
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PRInt16 *decision,
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nsIContentPolicy *policyService = nsnull)
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{
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if (policyService) {
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CHECK_CONTENT_POLICY_WITH_SERVICE(ShouldLoad, policyService);
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}
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CHECK_CONTENT_POLICY(ShouldLoad);
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}
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/**
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* Alias for calling ShouldProcess on the content policy service.
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* Parameters are the same as nsIContentPolicy::shouldProcess.
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*/
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inline nsresult
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NS_CheckContentProcessPolicy(PRUint32 contentType,
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nsIURI *contentLocation,
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nsIURI *requestOrigin,
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nsISupports *context,
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const nsACString &mimeType,
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nsISupports *extra,
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PRInt16 *decision,
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nsIContentPolicy *policyService = nsnull)
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{
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if (policyService) {
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CHECK_CONTENT_POLICY_WITH_SERVICE(ShouldProcess, policyService);
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}
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CHECK_CONTENT_POLICY(ShouldProcess);
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}
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#undef CHECK_CONTENT_POLICY
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#undef CHECK_CONTENT_POLICY_WITH_SERVICE
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/**
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* Helper function to get an nsIDocShell given a context.
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* If the context is a document or window, the corresponding docshell will be
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* returned.
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* If the context is a non-document DOM node, the docshell of its ownerDocument
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* will be returned.
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*
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* @param aContext the context to find a docshell for (can be null)
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* @return a WEAK pointer to the docshell, or nsnull if it could
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* not be obtained
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*/
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inline nsIDocShell*
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NS_CP_GetDocShellFromContext(nsISupports *aContext)
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{
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if (!aContext) {
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return nsnull;
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}
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nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aContext);
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if (!window) {
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// our context might be a document (which also QIs to nsIDOMNode), so
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// try that first
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(aContext);
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if (!doc) {
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// we were not a document after all, get our ownerDocument,
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// hopefully
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nsCOMPtr<nsIContent> content = do_QueryInterface(aContext);
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if (content) {
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doc = content->GetOwnerDoc();
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}
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}
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if (doc) {
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window = doc->GetWindow();
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}
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}
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if (!window) {
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return nsnull;
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}
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return window->GetDocShell();
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}
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#endif /* __nsContentPolicyUtils_h__ */
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