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−/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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−/* This Source Code Form is subject to the terms of the Mozilla Public
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− * License, v. 2.0. If a copy of the MPL was not distributed with this
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− * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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−
+
−/* DOM object holding utility CSS functions */
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−
+
−#include "CSS.h"
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−
+
−#include "mozilla/dom/BindingDeclarations.h"
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−#include "nsCSSParser.h"
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−#include "nsGlobalWindow.h"
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−#include "nsIDocument.h"
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−#include "nsIURI.h"
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−#include "nsStyleUtil.h"
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−#include "xpcpublic.h"
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−
+
−namespace mozilla {
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−namespace dom {
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−
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−struct SupportsParsingInfo
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−{
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−  nsIURI* mDocURI;
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−  nsIURI* mBaseURI;
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−  nsIPrincipal* mPrincipal;
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−};
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−
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−static nsresult
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−GetParsingInfo(const GlobalObject& aGlobal,
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−               SupportsParsingInfo& aInfo)
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−{
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−  nsGlobalWindow* win = xpc::WindowOrNull(aGlobal.Get());
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−  if (!win) {
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−    return NS_ERROR_FAILURE;
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−  }
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−
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−  nsCOMPtr<nsIDocument> doc = win->GetDoc();
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−  if (!doc) {
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−    return NS_ERROR_FAILURE;
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−  }
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−
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−  aInfo.mDocURI = nsCOMPtr<nsIURI>(doc->GetDocumentURI());
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−  aInfo.mBaseURI = nsCOMPtr<nsIURI>(doc->GetBaseURI());
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−  aInfo.mPrincipal = win->GetPrincipal();
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−  return NS_OK;
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−}
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−
+
−/* static */ bool
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−CSS::Supports(const GlobalObject& aGlobal,
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−              const nsAString& aProperty,
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−              const nsAString& aValue,
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−              ErrorResult& aRv)
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−{
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−  nsCSSParser parser;
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−  SupportsParsingInfo info;
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−
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−  nsresult rv = GetParsingInfo(aGlobal, info);
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−  if (NS_FAILED(rv)) {
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−    aRv.Throw(rv);
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−    return false;
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−  }
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−
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−  return parser.EvaluateSupportsDeclaration(aProperty, aValue, info.mDocURI,
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−                                            info.mBaseURI, info.mPrincipal);
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−}
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−
+
−/* static */ bool
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−CSS::Supports(const GlobalObject& aGlobal,
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−              const nsAString& aCondition,
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−              ErrorResult& aRv)
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−{
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−  nsCSSParser parser;
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−  SupportsParsingInfo info;
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−
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−  nsresult rv = GetParsingInfo(aGlobal, info);
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−  if (NS_FAILED(rv)) {
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−    aRv.Throw(rv);
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−    return false;
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−  }
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−
+
−  return parser.EvaluateSupportsCondition(aCondition, info.mDocURI,
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−                                          info.mBaseURI, info.mPrincipal);
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−}
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−
+
−/* static */ void
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−CSS::Escape(const GlobalObject& aGlobal,
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−            const nsAString& aIdent,
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−            nsAString& aReturn,
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−            ErrorResult& aRv)
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−{
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−  bool success = nsStyleUtil::AppendEscapedCSSIdent(aIdent, aReturn);
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−
+
−  if (!success) {
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−    aRv.Throw(NS_ERROR_DOM_INVALID_CHARACTER_ERR);
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−  }
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−}
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−
+
−} // namespace dom
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−} // namespace mozilla