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lightning-sunbird  0.9+nobinonly
nsXBLPrototypeResources.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Original Author: David W. Hyatt (hyatt@netscape.com)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
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00034  * the provisions above, a recipient may use your version of this file under
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsICSSStyleSheet.h"
00040 #include "nsIStyleRuleProcessor.h"
00041 #include "nsIDocument.h"
00042 #include "nsIContent.h"
00043 #include "nsIPresShell.h"
00044 #include "nsIXBLService.h"
00045 #include "nsIServiceManager.h"
00046 #include "nsXBLResourceLoader.h"
00047 #include "nsXBLPrototypeResources.h"
00048 #include "nsIDocumentObserver.h"
00049 #include "nsICSSLoader.h"
00050 #include "nsIURI.h"
00051 #include "nsLayoutCID.h"
00052 #include "nsCSSRuleProcessor.h"
00053 
00054 static NS_DEFINE_CID(kCSSLoaderCID, NS_CSS_LOADER_CID);
00055 
00056 MOZ_DECL_CTOR_COUNTER(nsXBLPrototypeResources)
00057 
00058 nsXBLPrototypeResources::nsXBLPrototypeResources(nsXBLPrototypeBinding* aBinding)
00059 {
00060   MOZ_COUNT_CTOR(nsXBLPrototypeResources);
00061 
00062   mLoader = new nsXBLResourceLoader(aBinding, this);
00063   NS_IF_ADDREF(mLoader);
00064 }
00065 
00066 nsXBLPrototypeResources::~nsXBLPrototypeResources()
00067 {
00068   MOZ_COUNT_DTOR(nsXBLPrototypeResources);
00069   if (mLoader) {
00070     mLoader->mResources = nsnull;
00071     NS_RELEASE(mLoader);
00072   }
00073 }
00074 
00075 void 
00076 nsXBLPrototypeResources::AddResource(nsIAtom* aResourceType, const nsAString& aSrc)
00077 {
00078   if (mLoader)
00079     mLoader->AddResource(aResourceType, aSrc);
00080 }
00081  
00082 void
00083 nsXBLPrototypeResources::LoadResources(PRBool* aResult)
00084 {
00085   if (mLoader)
00086     mLoader->LoadResources(aResult);
00087   else
00088     *aResult = PR_TRUE; // All resources loaded.
00089 }
00090 
00091 void
00092 nsXBLPrototypeResources::AddResourceListener(nsIContent* aBoundElement) 
00093 {
00094   if (mLoader)
00095     mLoader->AddResourceListener(aBoundElement);
00096 }
00097 
00098 static PRBool IsChromeURI(nsIURI* aURI)
00099 {
00100   PRBool isChrome=PR_FALSE;
00101   if (NS_SUCCEEDED(aURI->SchemeIs("chrome", &isChrome)) && isChrome)
00102     return PR_TRUE;
00103   return PR_FALSE;
00104 }
00105 
00106 nsresult
00107 nsXBLPrototypeResources::FlushSkinSheets()
00108 {
00109   if (mStyleSheetList.Count() == 0)
00110     return NS_OK;
00111 
00112   nsresult rv;
00113   // XXXbz should be getting loader off the document or something
00114   nsCOMPtr<nsICSSLoader> loader = do_CreateInstance(kCSSLoaderCID, &rv);
00115   if (NS_FAILED(rv)) return rv;
00116   
00117   // We have scoped stylesheets.  Reload any chrome stylesheets we
00118   // encounter.  (If they aren't skin sheets, it doesn't matter, since
00119   // they'll still be in the chrome cache.
00120   mRuleProcessor = nsnull;
00121 
00122   nsCOMArray<nsICSSStyleSheet> oldSheets(mStyleSheetList);
00123   mStyleSheetList.Clear();
00124   
00125   PRInt32 i;
00126   PRInt32 count = oldSheets.Count();
00127   for (i = 0; i < count; i++) {
00128     nsICSSStyleSheet* oldSheet = oldSheets[i];
00129     
00130     nsCOMPtr<nsIURI> uri;
00131     oldSheet->GetSheetURI(getter_AddRefs(uri));
00132 
00133     nsCOMPtr<nsICSSStyleSheet> newSheet;
00134     if (IsChromeURI(uri)) {
00135       if (NS_FAILED(loader->LoadAgentSheet(uri, getter_AddRefs(newSheet))))
00136         continue;
00137     }
00138     else {
00139       newSheet = oldSheet;
00140     }
00141     
00142     mStyleSheetList.AppendObject(newSheet);
00143   }
00144   mRuleProcessor = new nsCSSRuleProcessor(mStyleSheetList);
00145   
00146   return NS_OK;
00147 }