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/* 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/. */
#include "nsISupports.idl"
interface nsIDOMElement;
interface nsIDOMDocumentFragment;
interface nsIURI;
/**
* Non-Web HTML parser functionality to extensions and applications.
* Don't use this from within Gecko--use nsContentUtils, nsTreeSanitizer, etc.
* directly instead.
*/
[scriptable, uuid(a1101145-0025-411e-8873-fdf57bf28128)]
interface nsIParserUtils : nsISupports
{
/**
* Flag for sanitizer: Allow comment nodes.
*/
const unsigned long SanitizerAllowComments = (1 << 0);
/**
* Flag for sanitizer: Allow <style> and style="" (with contents sanitized
* in case of -moz-binding). Note! If -moz-binding is absent, properties
* that might be XSS risks in other Web engines are preserved!
*/
const unsigned long SanitizerAllowStyle = (1 << 1);
/**
* Flag for sanitizer: Only allow cid: URLs for embedded content.
*
* At present, sanitizing CSS backgrounds, etc., is not supported, so setting
* this together with SanitizerAllowStyle doesn't make sense.
*
* At present, sanitizing CSS syntax in SVG presentational attributes is not
* supported, so this option flattens out SVG.
*/
const unsigned long SanitizerCidEmbedsOnly = (1 << 2);
/**
* Flag for sanitizer: Drop non-CSS presentational HTML elements and
* attributes, such as <font>, <center> and bgcolor="".
*/
const unsigned long SanitizerDropNonCSSPresentation = (1 << 3);
/**
* Flag for sanitizer: Drop forms and form controls (excluding
* fieldset/legend).
*/
const unsigned long SanitizerDropForms = (1 << 4);
/**
* Flag for sanitizer: Drop <img>, <video>, <audio> and <source> and flatten
* out SVG.
*/
const unsigned long SanitizerDropMedia = (1 << 5);
/**
* Parses a string into an HTML document, sanitizes the document and
* returns the result serialized to a string.
*
* The sanitizer is designed to protect against XSS when sanitized content
* is inserted into a different-origin context without an iframe-equivalent
* sandboxing mechanism.
*
* By default, the sanitizer doesn't try to avoid leaking information that
* the content was viewed to third parties. That is, by default, e.g.
* <img src> pointing to an HTTP server potentially controlled by a third
* party is not removed. To avoid ambient information leakage upon loading
* the sanitized content, use the SanitizerInternalEmbedsOnly flag. In that
* case, <a href> links (and similar) to other content are preserved, so an
* explicit user action (following a link) after the content has been loaded
* can still leak information.
*
* By default, non-dangerous non-CSS presentational HTML elements and
* attributes or forms are not removed. To remove these, use
* SanitizerDropNonCSSPresentation and/or SanitizerDropForms.
*
* By default, comments and CSS is removed. To preserve comments, use
* SanitizerAllowComments. To preserve <style> and style="", use
* SanitizerAllowStyle. -moz-binding is removed from <style> and style="" if
* present. In this case, properties that Gecko doesn't recognize can get
* removed as a side effect. Note! If -moz-binding is not present, <style>
* and style="" and SanitizerAllowStyle is specified, the sanitized content
* may still be XSS dangerous if loaded into a non-Gecko Web engine!
*
* @param src the HTML source to parse (C++ callers are allowed but not
* required to use the same string for the return value.)
* @param flags sanitization option flags defined above
*/
AString sanitize(in AString src, in unsigned long flags);
/**
* Convert HTML to plain text.
*
* @param src the HTML source to parse (C++ callers are allowed but not
* required to use the same string for the return value.)
* @param flags conversion option flags defined in nsIDocumentEncoder
* @param wrapCol number of characters per line; 0 for no auto-wrapping
*/
AString convertToPlainText(in AString src,
in unsigned long flags,
in unsigned long wrapCol);
/**
* Parses markup into a sanitized document fragment.
*
* @param fragment the input markup
* @param flags sanitization option flags defined above
* @param isXML true if |fragment| is XML and false if HTML
* @param baseURI the base URL for this fragment
* @param element the context node for the fragment parsing algorithm
*/
nsIDOMDocumentFragment parseFragment(in AString fragment,
in unsigned long flags,
in boolean isXML,
in nsIURI baseURI,
in nsIDOMElement element);
};
%{ C++
#define NS_PARSERUTILS_CONTRACTID \
"@mozilla.org/parserutils;1"
#define NS_PARSERUTILS_CID \
{ 0xaf7b24cb, 0x893f, 0x41bb, { 0x96, 0x1f, 0x5a, 0x69, 0x38, 0x8e, 0x27, 0xc3 } }
%}
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