michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* DOM object holding utility CSS functions */
michael@0: 
michael@0: #include "CSS.h"
michael@0: 
michael@0: #include "mozilla/dom/BindingDeclarations.h"
michael@0: #include "nsCSSParser.h"
michael@0: #include "nsGlobalWindow.h"
michael@0: #include "nsIDocument.h"
michael@0: #include "nsIURI.h"
michael@0: #include "nsStyleUtil.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: struct SupportsParsingInfo
michael@0: {
michael@0:   nsIURI* mDocURI;
michael@0:   nsIURI* mBaseURI;
michael@0:   nsIPrincipal* mPrincipal;
michael@0: };
michael@0: 
michael@0: static nsresult
michael@0: GetParsingInfo(nsISupports* aGlobal,
michael@0:                SupportsParsingInfo& aInfo)
michael@0: {
michael@0:   if (!aGlobal) {
michael@0:     return NS_ERROR_FAILURE;
michael@0:   }
michael@0: 
michael@0:   nsGlobalWindow* win = nsGlobalWindow::FromSupports(aGlobal);
michael@0:   nsCOMPtr<nsIDocument> doc = win->GetDoc();
michael@0:   if (!doc) {
michael@0:     return NS_ERROR_FAILURE;
michael@0:   }
michael@0: 
michael@0:   aInfo.mDocURI = nsCOMPtr<nsIURI>(doc->GetDocumentURI());
michael@0:   aInfo.mBaseURI = nsCOMPtr<nsIURI>(doc->GetBaseURI());
michael@0:   aInfo.mPrincipal = win->GetPrincipal();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: /* static */ bool
michael@0: CSS::Supports(const GlobalObject& aGlobal,
michael@0:               const nsAString& aProperty,
michael@0:               const nsAString& aValue,
michael@0:               ErrorResult& aRv)
michael@0: {
michael@0:   nsCSSParser parser;
michael@0:   SupportsParsingInfo info;
michael@0: 
michael@0:   nsresult rv = GetParsingInfo(aGlobal.GetAsSupports(), info);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     aRv.Throw(rv);
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   return parser.EvaluateSupportsDeclaration(aProperty, aValue, info.mDocURI,
michael@0:                                             info.mBaseURI, info.mPrincipal);
michael@0: }
michael@0: 
michael@0: /* static */ bool
michael@0: CSS::Supports(const GlobalObject& aGlobal,
michael@0:               const nsAString& aCondition,
michael@0:               ErrorResult& aRv)
michael@0: {
michael@0:   nsCSSParser parser;
michael@0:   SupportsParsingInfo info;
michael@0: 
michael@0:   nsresult rv = GetParsingInfo(aGlobal.GetAsSupports(), info);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     aRv.Throw(rv);
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   return parser.EvaluateSupportsCondition(aCondition, info.mDocURI,
michael@0:                                           info.mBaseURI, info.mPrincipal);
michael@0: }
michael@0: 
michael@0: /* static */ void
michael@0: CSS::Escape(const GlobalObject& aGlobal,
michael@0:             const nsAString& aIdent,
michael@0:             nsAString& aReturn,
michael@0:             ErrorResult& aRv)
michael@0: {
michael@0:   bool success = nsStyleUtil::AppendEscapedCSSIdent(aIdent, aReturn);
michael@0: 
michael@0:   if (!success) {
michael@0:     aRv.Throw(NS_ERROR_DOM_INVALID_CHARACTER_ERR);
michael@0:   }
michael@0: }
michael@0: 
michael@0: } // dom
michael@0: } // mozilla