Add a better app filtering mechanism and filter widgets

The old one didn't use the app filter when packages
were added or updated, only in the initial load.

The app filter is now also used for appwidget providers.

Bug: 10895858
Bug: 10898990
Change-Id: Id29bbc3cf7bdb0c360edd92f768b86684bd338ed

1 files changed, 35 insertions, 0 deletions

diff --git a/src/com/android/launcher3/AppFilter.java b/src/com/android/launcher3/AppFilter.java
new file mode 100644
index 000000000..e01436d7a
--- /dev/null
+++ b/src/com/android/launcher3/AppFilter.java
@@ -0,0 +1,35 @@
+package com.android.launcher3;
+
+import android.content.ComponentName;
+import android.text.TextUtils;
+import android.util.Log;
+
+public abstract class AppFilter {
+
+    private static final boolean DBG = false;
+    private static final String TAG = "AppFilter";
+
+    public abstract boolean shouldShowApp(ComponentName app);
+
+    public static AppFilter loadByName(String className) {
+        if (TextUtils.isEmpty(className)) return null;
+        if (DBG) Log.d(TAG, "Loading AppFilter: " + className);
+        try {
+            Class<?> cls = Class.forName(className);
+            return (AppFilter) cls.newInstance();
+        } catch (ClassNotFoundException e) {
+            Log.e(TAG, "Bad AppFilter class", e);
+            return null;
+        } catch (InstantiationException e) {
+            Log.e(TAG, "Bad AppFilter class", e);
+            return null;
+        } catch (IllegalAccessException e) {
+            Log.e(TAG, "Bad AppFilter class", e);
+            return null;
+        } catch (ClassCastException e) {
+            Log.e(TAG, "Bad AppFilter class", e);
+            return null;
+        }
+    }
+
+}