content/xbl/src/nsXBLPrototypeResources.cpp

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   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
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   8  * http://www.mozilla.org/MPL/
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  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla Communicator client code.
  16  *
  17  * The Initial Developer of the Original Code is
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  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
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  22  * Contributor(s):
  23  *   Original Author: David W. Hyatt (hyatt@netscape.com)
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  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either of the GNU General Public License Version 2 or later (the "GPL"),
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  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsICSSStyleSheet.h"
  40 #include "nsIStyleRuleProcessor.h"
  41 #include "nsIDocument.h"
  42 #include "nsIContent.h"
  43 #include "nsIPresShell.h"
  44 #include "nsIXBLService.h"
  45 #include "nsIServiceManager.h"
  46 #include "nsXBLResourceLoader.h"
  47 #include "nsXBLPrototypeResources.h"
  48 #include "nsIDocumentObserver.h"
  49 #include "nsICSSLoader.h"
  50 #include "nsIURI.h"
  51 #include "nsLayoutCID.h"
  52 #include "nsCSSRuleProcessor.h"
  53 #include "nsStyleSet.h"
  54
  55 static NS_DEFINE_CID(kCSSLoaderCID, NS_CSS_LOADER_CID);
  56
  57 nsXBLPrototypeResources::nsXBLPrototypeResources(nsXBLPrototypeBinding* aBinding)
  58 {
  59   MOZ_COUNT_CTOR(nsXBLPrototypeResources);
  60
  61   mLoader = new nsXBLResourceLoader(aBinding, this);
  62   NS_IF_ADDREF(mLoader);
  63 }
  64
  65 nsXBLPrototypeResources::~nsXBLPrototypeResources()
  66 {
  67   MOZ_COUNT_DTOR(nsXBLPrototypeResources);
  68   if (mLoader) {
  69     mLoader->mResources = nsnull;
  70     NS_RELEASE(mLoader);
  71   }
  72 }
  73
  74 void
  75 nsXBLPrototypeResources::AddResource(nsIAtom* aResourceType, const nsAString& aSrc)
  76 {
  77   if (mLoader)
  78     mLoader->AddResource(aResourceType, aSrc);
  79 }
  80
  81 void
  82 nsXBLPrototypeResources::LoadResources(PRBool* aResult)
  83 {
  84   if (mLoader)
  85     mLoader->LoadResources(aResult);
  86   else
  87     *aResult = PR_TRUE; // All resources loaded.
  88 }
  89
  90 void
  91 nsXBLPrototypeResources::AddResourceListener(nsIContent* aBoundElement)
  92 {
  93   if (mLoader)
  94     mLoader->AddResourceListener(aBoundElement);
  95 }
  96
  97 static PRBool IsChromeURI(nsIURI* aURI)
  98 {
  99   PRBool isChrome=PR_FALSE;
 100   if (NS_SUCCEEDED(aURI->SchemeIs("chrome", &isChrome)) && isChrome)
 101     return PR_TRUE;
 102   return PR_FALSE;
 103 }
 104
 105 nsresult
 106 nsXBLPrototypeResources::FlushSkinSheets()
 107 {
 108   if (mStyleSheetList.Count() == 0)
 109     return NS_OK;
 110
 111   nsresult rv;
 112   // XXXbz should be getting loader off the document or something
 113   nsCOMPtr<nsICSSLoader> loader = do_CreateInstance(kCSSLoaderCID, &rv);
 114   if (NS_FAILED(rv)) return rv;
 115
 116   // We have scoped stylesheets.  Reload any chrome stylesheets we
 117   // encounter.  (If they aren't skin sheets, it doesn't matter, since
 118   // they'll still be in the chrome cache.
 119   mRuleProcessor = nsnull;
 120
 121   nsCOMArray<nsICSSStyleSheet> oldSheets(mStyleSheetList);
 122   mStyleSheetList.Clear();
 123
 124   PRInt32 i;
 125   PRInt32 count = oldSheets.Count();
 126   for (i = 0; i < count; i++) {
 127     nsICSSStyleSheet* oldSheet = oldSheets[i];
 128
 129     nsCOMPtr<nsIURI> uri;
 130     oldSheet->GetSheetURI(getter_AddRefs(uri));
 131
 132     nsCOMPtr<nsICSSStyleSheet> newSheet;
 133     if (IsChromeURI(uri)) {
 134       if (NS_FAILED(loader->LoadSheetSync(uri, getter_AddRefs(newSheet))))
 135         continue;
 136     }
 137     else {
 138       newSheet = oldSheet;
 139     }
 140
 141     mStyleSheetList.AppendObject(newSheet);
 142   }
 143   mRuleProcessor = new nsCSSRuleProcessor(mStyleSheetList,
 144                                           nsStyleSet::eDocSheet);
 145
 146   return NS_OK;
 147 }