Bug 660742 accessible should use mozilla::Preferences r=roc+davidb

accessible/src/base/nsAccessible.cpp

@@ -89,8 +89,6 @@
 #include "nsReadableUtils.h"
 #include "prdtoa.h"
 #include "nsIAtom.h"
-#include "nsIPrefService.h"
-#include "nsIPrefBranch.h"
 #include "nsIURI.h"
 #include "nsArrayUtils.h"
 #include "nsIMutableArray.h"
@@ -106,6 +104,9 @@
 #endif
 
 #include "mozilla/unused.h"
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
 
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -339,14 +340,9 @@ nsAccessible::Description(nsString& aDescription)
 static PRInt32
 GetAccessModifierMask(nsIContent* aContent)
 {
-  nsCOMPtr<nsIPrefBranch> prefBranch =
-    do_GetService(NS_PREFSERVICE_CONTRACTID);
-  if (!prefBranch)
-    return 0;
-
   // use ui.key.generalAccessKey (unless it is -1)
-  PRInt32 accessKey;
-  nsresult rv = prefBranch->GetIntPref("ui.key.generalAccessKey", &accessKey);
+  PRInt32 accessKey = -1;
+  nsresult rv = Preferences::GetInt("ui.key.generalAccessKey", accessKey);
   if (NS_SUCCEEDED(rv) && accessKey != -1) {
     switch (accessKey) {
       case nsIDOMKeyEvent::DOM_VK_SHIFT:   return NS_MODIFIER_SHIFT;
@@ -372,14 +368,13 @@ GetAccessModifierMask(nsIContent* aContent)
   PRInt32 itemType, accessModifierMask = 0;
   treeItem->GetItemType(&itemType);
   switch (itemType) {
+    case nsIDocShellTreeItem::typeChrome:
+      rv = Preferences::GetInt("ui.key.chromeAccess", &accessModifierMask);
+      break;
 
-  case nsIDocShellTreeItem::typeChrome:
-    rv = prefBranch->GetIntPref("ui.key.chromeAccess", &accessModifierMask);
-    break;
-
-  case nsIDocShellTreeItem::typeContent:
-    rv = prefBranch->GetIntPref("ui.key.contentAccess", &accessModifierMask);
-    break;
+    case nsIDocShellTreeItem::typeContent:
+      rv = Preferences::GetInt("ui.key.contentAccess", &accessModifierMask);
+      break;
   }
 
   return NS_SUCCEEDED(rv) ? accessModifierMask : 0;

accessible/src/msaa/nsAccessNodeWrap.cpp

@@ -54,11 +54,13 @@
 #include "nsIDOMNSHTMLElement.h"
 #include "nsIFrame.h"
 #include "nsINameSpaceManager.h"
-#include "nsIPrefService.h"
-#include "nsIPrefBranch.h"
 #include "nsPIDOMWindow.h"
 #include "nsIServiceManager.h"
 
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+
 /// the accessible library and cached methods
 HINSTANCE nsAccessNodeWrap::gmAccLib = nsnull;
 HINSTANCE nsAccessNodeWrap::gmUserLib = nsnull;
@@ -711,22 +713,16 @@ void nsAccessNodeWrap::TurnOffNewTabSwitchingForJawsAndWE()
   // Check to see if the pref for disallowing CtrlTab is already set.
   // If so, bail out.
   // If not, set it.
-  nsCOMPtr<nsIPrefBranch> prefs (do_GetService(NS_PREFSERVICE_CONTRACTID));
-  if (prefs) {
-    PRBool hasDisallowNewCtrlTabPref = PR_FALSE;
-    nsresult rv = prefs->PrefHasUserValue(CTRLTAB_DISALLOW_FOR_SCREEN_READERS_PREF,
-             &hasDisallowNewCtrlTabPref);
-    if (NS_SUCCEEDED(rv) && hasDisallowNewCtrlTabPref) {
-      // This pref has been set before. There is no default for it.
-      // Do nothing further, respect the setting that's there.
-      // That way, if noone touches it, it'll stay on after toggled once.
-      // If someone decided to turn it off, we respect that, too.
-      return;
-    }
-    
-    // Value has never been set, set it.
-    prefs->SetBoolPref(CTRLTAB_DISALLOW_FOR_SCREEN_READERS_PREF, PR_TRUE);
+  if (Preferences::HasUserValue(CTRLTAB_DISALLOW_FOR_SCREEN_READERS_PREF)) {
+    // This pref has been set before. There is no default for it.
+    // Do nothing further, respect the setting that's there.
+    // That way, if noone touches it, it'll stay on after toggled once.
+    // If someone decided to turn it off, we respect that, too.
+    return;
   }
+  
+  // Value has never been set, set it.
+  Preferences::SetBool(CTRLTAB_DISALLOW_FOR_SCREEN_READERS_PREF, PR_TRUE);
 }
 
 void nsAccessNodeWrap::DoATSpecificProcessing()

accessible/src/msaa/nsAccessibleWrap.cpp

@@ -58,7 +58,6 @@
 #include "nsIScrollableFrame.h"
 #include "nsINameSpaceManager.h"
 #include "nsINodeInfo.h"
-#include "nsIPrefService.h"
 #include "nsRootAccessible.h"
 #include "nsIServiceManager.h"
 #include "nsTextFormatter.h"

accessible/src/xul/nsXULMenuAccessible.cpp

@@ -50,8 +50,6 @@
 #include "nsIDOMXULSelectCntrlItemEl.h"
 #include "nsIDOMXULMultSelectCntrlEl.h"
 #include "nsIDOMKeyEvent.h"
-#include "nsIPrefService.h"
-#include "nsIPrefBranch.h"
 #include "nsIServiceManager.h"
 #include "nsIPresShell.h"
 #include "nsIContent.h"
@@ -59,6 +57,10 @@
 #include "nsILookAndFeel.h"
 #include "nsWidgetsCID.h"
 
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+
 
 static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
 
@@ -410,10 +412,7 @@ nsXULMenuitemAccessible::GetKeyboardShortcut(nsAString& aAccessKey)
       // No need to cache pref service, this happens rarely
       if (gMenuAccesskeyModifier == -1) {
         // Need to initialize cached global accesskey pref
-        gMenuAccesskeyModifier = 0;
-        nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
-        if (prefBranch)
-          prefBranch->GetIntPref("ui.key.menuAccessKey", &gMenuAccesskeyModifier);
+        gMenuAccesskeyModifier = Preferences::GetInt("ui.key.menuAccessKey", 0);
       }
 
       nsAutoString propertyKey;

modules/libpref/public/Preferences.h

@@ -188,6 +188,11 @@ public:
    */
   static nsresult ClearUser(const char* aPref);
 
+  /**
+   * Whether the pref has a user value or not.
+   */
+  static PRBool HasUserValue(const char* aPref);
+
   /**
    * Adds/Removes the observer for the root pref branch.
    * The observer is referenced strongly if AddStrongObserver is used.  On the

modules/libpref/src/Preferences.cpp

@@ -1285,6 +1285,20 @@ Preferences::ClearUser(const char* aPref)
   return sPreferences->mRootBranch->ClearUserPref(aPref);
 }
 
+// static
+PRBool
+Preferences::HasUserValue(const char* aPref)
+{
+  NS_ENSURE_TRUE(InitStaticMembers(), PR_FALSE);
+  PRBool hasUserValue;
+  nsresult rv =
+    sPreferences->mRootBranch->PrefHasUserValue(aPref, &hasUserValue);
+  if (NS_FAILED(rv)) {
+    return PR_FALSE;
+  }
+  return hasUserValue;
+}
+
 // static
 nsresult
 Preferences::AddStrongObserver(nsIObserver* aObserver,