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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 mozilla_dom_l10n_L10nOverlays_h
#define mozilla_dom_l10n_L10nOverlays_h
#include "mozilla/dom/L10nOverlaysBinding.h"
#include "mozilla/dom/LocalizationBinding.h"
class nsINode;
namespace mozilla {
namespace dom {
class DocumentFragment;
class Element;
class L10nOverlays {
public:
/**
* Translate an element.
*
* Translate the element's text content and attributes. Some HTML markup is
* allowed in the translation. The element's children with the data-l10n-name
* attribute will be treated as arguments to the translation. If the
* translation defines the same children, their attributes and text contents
* will be used for translating the matching source child.
*/
static void TranslateElement(const GlobalObject& aGlobal, Element& aElement,
const L10nMessage& aTranslation,
Nullable<nsTArray<L10nOverlaysError>>& aErrors);
static void TranslateElement(Element& aElement,
const L10nMessage& aTranslation,
nsTArray<L10nOverlaysError>& aErrors,
ErrorResult& aRv);
private:
/**
* Check if attribute is allowed for the given element.
*
* This method is used by the sanitizer when the translation markup contains
* DOM attributes, or when the translation has traits which map to DOM
* attributes.
*
* `aExplicitlyAllowed` can be passed as a list of attributes explicitly
* allowed on this element.
*/
static bool IsAttrNameLocalizable(const nsAtom* nameAtom, Element* aElement,
nsTArray<nsString>* aExplicitlyAllowed);
/**
* Create a text node from text content of an Element.
*/
static already_AddRefed<nsINode> CreateTextNodeFromTextContent(
Element* aElement, ErrorResult& aRv);
/**
* Transplant localizable attributes of an element to another element.
*
* Any localizable attributes already set on the target element will be
* cleared.
*/
static void OverlayAttributes(
const Nullable<Sequence<AttributeNameValue>>& aTranslation,
Element* aToElement, ErrorResult& aRv);
static void OverlayAttributes(Element* aFromElement, Element* aToElement,
ErrorResult& aRv);
/**
* Helper to set textContent and localizable attributes on an element.
*/
static void ShallowPopulateUsing(Element* aFromElement, Element* aToElement,
ErrorResult& aRv);
/**
* Sanitize a child element created by the translation.
*
* Try to find a corresponding child in sourceElement and use it as the base
* for the sanitization. This will preserve functional attributes defined on
* the child element in the source HTML.
*/
static already_AddRefed<nsINode> GetNodeForNamedElement(
Element* aSourceElement, Element* aTranslatedChild,
nsTArray<L10nOverlaysError>& aErrors, ErrorResult& aRv);
/**
* Check if element is allowed in the translation.
*
* This method is used by the sanitizer when the translation markup contains
* an element which is not present in the source code.
*/
static bool IsElementAllowed(Element* aElement);
/**
* Sanitize an allowed element.
*
* Text-level elements allowed in translations may only use safe attributes
* and will have any nested markup stripped to text content.
*/
static already_AddRefed<Element> CreateSanitizedElement(Element* aElement,
ErrorResult& aRv);
/**
* Replace child nodes of an element with child nodes of another element.
*
* The contents of the target element will be cleared and fully replaced with
* sanitized contents of the source element.
*/
static void OverlayChildNodes(DocumentFragment* aFromFragment,
Element* aToElement,
nsTArray<L10nOverlaysError>& aErrors,
ErrorResult& aRv);
/**
* A helper used to test if the string contains HTML markup.
*/
static bool ContainsMarkup(const nsACString& aStr);
};
} // namespace dom
} // namespace mozilla
#endif
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