mirror of
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284 lines
11 KiB
C++
284 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ft=cpp tw=78 sw=2 et ts=8 : */
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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+bmo@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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#include "nsISupports.idl"
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interface nsIURI;
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interface nsIDOMNode;
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/**
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* Interface for content policy mechanism. Implementations of this
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* interface can be used to control loading of various types of out-of-line
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* content, or processing of certain types of in-line content.
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*
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* WARNING: do not block the caller from shouldLoad or shouldProcess (e.g.,
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* by launching a dialog to prompt the user for something).
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*/
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[scriptable,uuid(344f9cb0-9a17-44c5-ab96-ee707884266c)]
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interface nsIContentPolicy : nsISupports
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{
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const unsigned long TYPE_OTHER = 1;
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/**
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* Indicates an executable script (such as JavaScript).
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*/
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const unsigned long TYPE_SCRIPT = 2;
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/**
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* Indicates an image (e.g., IMG elements).
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*/
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const unsigned long TYPE_IMAGE = 3;
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/**
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* Indicates a stylesheet (e.g., STYLE elements).
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*/
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const unsigned long TYPE_STYLESHEET = 4;
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/**
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* Indicates a generic object (plugin-handled content typically falls under
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* this category).
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*/
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const unsigned long TYPE_OBJECT = 5;
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/**
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* Indicates a document at the top-level (i.e., in a browser).
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*/
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const unsigned long TYPE_DOCUMENT = 6;
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/**
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* Indicates a document contained within another document (e.g., IFRAMEs,
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* FRAMES, and OBJECTs).
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*/
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const unsigned long TYPE_SUBDOCUMENT = 7;
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/**
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* Indicates a timed refresh.
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*
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* shouldLoad will never get this, because it does not represent content
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* to be loaded (the actual load triggered by the refresh will go through
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* shouldLoad as expected).
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*
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* shouldProcess will get this for, e.g., META Refresh elements and HTTP
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* Refresh headers.
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*/
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const unsigned long TYPE_REFRESH = 8;
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/**
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* Indicates an XBL binding request, triggered either by -moz-binding CSS
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* property or Document.addBinding method.
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*/
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const unsigned long TYPE_XBL = 9;
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/**
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* Indicates a ping triggered by a click on <A PING="..."> element.
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*/
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const unsigned long TYPE_PING = 10;
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/**
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* Indicates an XMLHttpRequest. Also used for document.load.
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*/
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const unsigned long TYPE_XMLHTTPREQUEST = 11;
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/**
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* Indicates a request by a plugin.
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*/
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const unsigned long TYPE_OBJECT_SUBREQUEST = 12;
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/**
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* Indicates a DTD loaded by an XML document.
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*/
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const unsigned long TYPE_DTD = 13;
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/**
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* Indicates a font loaded via @font-face rule.
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*/
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const unsigned long TYPE_FONT = 14;
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/**
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* Indicates a video or audio load.
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*/
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const unsigned long TYPE_MEDIA = 15;
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/* Please update nsContentBlocker when adding new content types. */
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//////////////////////////////////////////////////////////////////////
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/**
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* Returned from shouldLoad or shouldProcess if the load or process request
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* is rejected based on details of the request.
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*/
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const short REJECT_REQUEST = -1;
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/**
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* Returned from shouldLoad or shouldProcess if the load/process is rejected
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* based solely on its type (of the above flags).
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*
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* NOTE that it is not meant to stop future requests for this type--only the
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* current request.
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*/
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const short REJECT_TYPE = -2;
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/**
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* Returned from shouldLoad or shouldProcess if the load/process is rejected
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* based on the server it is hosted on or requested from (aContentLocation or
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* aRequestOrigin), e.g., if you block an IMAGE because it is served from
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* goatse.cx (even if you don't necessarily block other types from that
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* server/domain).
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*
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* NOTE that it is not meant to stop future requests for this server--only the
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* current request.
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*/
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const short REJECT_SERVER = -3;
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/**
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* Returned from shouldLoad or shouldProcess if the load/process is rejected
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* based on some other criteria. Mozilla callers will handle this like
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* REJECT_REQUEST; third-party implementors may, for example, use this to
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* direct their own callers to consult the extra parameter for additional
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* details.
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*/
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const short REJECT_OTHER = -4;
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/**
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* Returned from shouldLoad or shouldProcess if the load or process request
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* is not rejected.
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*/
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const short ACCEPT = 1;
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//////////////////////////////////////////////////////////////////////
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/**
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* Should the resource at this location be loaded?
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* ShouldLoad will be called before loading the resource at aContentLocation
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* to determine whether to start the load at all.
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*
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* @param aContentType the type of content being tested. This will be one
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* one of the TYPE_* constants.
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*
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* @param aContentLocation the location of the content being checked; must
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* not be null
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*
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* @param aRequestOrigin OPTIONAL. the location of the resource that
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* initiated this load request; can be null if
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* inapplicable
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*
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* @param aContext OPTIONAL. the nsIDOMNode or nsIDOMWindow that
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* initiated the request, or something that can QI
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* to one of those; can be null if inapplicable.
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*
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* @param aMimeTypeGuess OPTIONAL. a guess for the requested content's
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* MIME type, based on information available to
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* the request initiator (e.g., an OBJECT's type
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* attribute); does not reliably reflect the
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* actual MIME type of the requested content
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*
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* @param aExtra an OPTIONAL argument, pass-through for non-Gecko
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* callers to pass extra data to callees.
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*
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* @return ACCEPT or REJECT_*
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*
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* @note shouldLoad can be called while the DOM and layout of the document
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* involved is in an inconsistent state. This means that implementors of
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* this method MUST NOT do any of the following:
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* 1) Modify the DOM in any way (e.g. setting attributes is a no-no).
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* 2) Query any DOM properties that depend on layout (e.g. offset*
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* properties).
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* 3) Query any DOM properties that depend on style (e.g. computed style).
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* 4) Query any DOM properties that depend on the current state of the DOM
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* outside the "context" node (e.g. lengths of node lists).
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* 5) [JavaScript implementations only] Access properties of any sort on any
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* object without using XPCNativeWrapper (either explicitly or
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* implicitly). Due to various DOM0 things, this leads to item 4.
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* If you do any of these things in your shouldLoad implementation, expect
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* unpredictable behavior, possibly including crashes, content not showing
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* up, content showing up doubled, etc. If you need to do any of the things
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* above, do them off timeout or event.
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*/
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short shouldLoad(in unsigned long aContentType,
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in nsIURI aContentLocation,
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in nsIURI aRequestOrigin,
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in nsISupports aContext,
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in ACString aMimeTypeGuess,
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in nsISupports aExtra);
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/**
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* Should the resource be processed?
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* ShouldProcess will be called once all the information passed to it has
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* been determined about the resource, typically after part of the resource
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* has been loaded.
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*
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* @param aContentType the type of content being tested. This will be one
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* one of the TYPE_* constants.
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*
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* @param aContentLocation OPTIONAL; the location of the resource being
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* requested: MAY be, e.g., a post-redirection URI
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* for the resource.
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*
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* @param aRequestOrigin OPTIONAL. the location of the resource that
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* initiated this load request; can be null if
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* inapplicable
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*
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* @param aContext OPTIONAL. the nsIDOMNode or nsIDOMWindow that
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* initiated the request, or something that can QI
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* to one of those; can be null if inapplicable.
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*
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* @param aMimeType the MIME type of the requested resource (e.g.,
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* image/png), as reported by the networking library,
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* if available (may be empty if inappropriate for
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* the type, e.g., TYPE_REFRESH).
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*
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* @param aExtra an OPTIONAL argument, pass-through for non-Gecko
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* callers to pass extra data to callees.
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*
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* @return ACCEPT or REJECT_*
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*
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* @note shouldProcess can be called while the DOM and layout of the document
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* involved is in an inconsistent state. See the note on shouldLoad to see
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* what this means for implementors of this method.
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*/
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short shouldProcess(in unsigned long aContentType,
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in nsIURI aContentLocation,
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in nsIURI aRequestOrigin,
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in nsISupports aContext,
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in ACString aMimeType,
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in nsISupports aExtra);
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};
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