Add a mechansim to extend the list of agent or user stylesheets. Bug 179006, r+sr=bzbarsky.

git-svn-id: svn://10.0.0.236/trunk@167752 18797224-902f-48f8-a5cc-f745e15eee43
2005-01-15 00:10:19 +00:00
parent 55e775a8a2
commit 82d9392c4f
6 changed files with 320 additions and 1 deletions
--- a/mozilla/layout/base/nsStyleSheetService.cpp
+++ b/mozilla/layout/base/nsStyleSheetService.cpp
@@ -0,0 +1,140 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla.
+ *
+ * The Initial Developer of the Original Code is
+ * IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2005
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  Brian Ryner <bryner@brianryner.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsStyleSheetService.h"
+#include "nsICSSLoader.h"
+#include "nsICSSStyleSheet.h"
+#include "nsContentCID.h"
+#include "nsCOMPtr.h"
+#include "nsIServiceManager.h"
+#include "nsICategoryManager.h"
+#include "nsISupportsPrimitives.h"
+#include "nsNetUtil.h"
+
+static NS_DEFINE_CID(kCSSLoaderCID, NS_CSS_LOADER_CID);
+
+nsStyleSheetService *nsStyleSheetService::gInstance = nsnull;
+
+nsStyleSheetService::nsStyleSheetService()
+{
+  NS_ASSERTION(!gInstance, "Someone is using CreateInstance instead of GetService");
+  gInstance = this;
+}
+
+nsStyleSheetService::~nsStyleSheetService()
+{
+  gInstance = nsnull;
+}
+
+NS_IMPL_ISUPPORTS1(nsStyleSheetService, nsIStyleSheetService)
+
+void
+nsStyleSheetService::RegisterFromEnumerator(nsICategoryManager  *aManager,
+                                            const char          *aCategory,
+                                            nsISimpleEnumerator *aEnumerator,
+                                            PRUint32             aSheetType)
+{
+  if (!aEnumerator)
+    return;
+
+  PRBool hasMore;
+  while (NS_SUCCEEDED(aEnumerator->HasMoreElements(&hasMore)) && hasMore) {
+    nsCOMPtr<nsISupports> element;
+    if (NS_FAILED(aEnumerator->GetNext(getter_AddRefs(element))))
+      break;
+
+    nsCOMPtr<nsISupportsCString> icStr = do_QueryInterface(element);
+    NS_ASSERTION(icStr,
+                 "category manager entries must be nsISupportsCStrings");
+
+    nsCAutoString name;
+    icStr->GetData(name);
+
+    nsXPIDLCString spec;
+    aManager->GetCategoryEntry(aCategory, name.get(), getter_Copies(spec));
+
+    nsCOMPtr<nsIURI> uri;
+    NS_NewURI(getter_AddRefs(uri), spec);
+    if (uri)
+      LoadAndRegisterSheet(uri, aSheetType);
+  }
+}
+
+nsresult
+nsStyleSheetService::Init()
+{
+  // Enumerate all of the style sheet URIs registered in the category
+  // manager and load them.
+
+  nsCOMPtr<nsICategoryManager> catMan =
+    do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
+
+  NS_ENSURE_TRUE(catMan, NS_ERROR_OUT_OF_MEMORY);
+
+  nsCOMPtr<nsISimpleEnumerator> sheets;
+  catMan->EnumerateCategory("agent-style-sheets", getter_AddRefs(sheets));
+  RegisterFromEnumerator(catMan, "agent-style-sheets", sheets, AGENT_SHEET);
+
+  catMan->EnumerateCategory("user-style-sheets", getter_AddRefs(sheets));
+  RegisterFromEnumerator(catMan, "user-style-sheets", sheets, USER_SHEET);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsStyleSheetService::LoadAndRegisterSheet(nsIURI *aSheetURI,
+                                          PRUint32 aSheetType)
+{
+  nsCOMPtr<nsICSSLoader> loader = do_CreateInstance(kCSSLoaderCID);
+  nsCOMPtr<nsICSSStyleSheet> sheet;
+  nsresult rv = loader->LoadAgentSheet(aSheetURI, getter_AddRefs(sheet));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  switch (aSheetType) {
+  case AGENT_SHEET:
+    mAgentSheets.AppendObject(sheet);
+    break;
+  case USER_SHEET:
+    mUserSheets.AppendObject(sheet);
+    break;
+  default:
+    NS_ERROR("Unknown sheet type");
+  }
+
+  return NS_OK;
+}