Enable apps to exclude their own roots from the DocumentsUI roots list.

- Add DocumentsContract.EXTRA_EXCLUDE_SELF (boolean extra)
- Add code to DocumentsActivity to cache the providers of the calling
  app if EXTRA_EXCLUDE_SELF is set on incoming Intents.
- Add code to RootsCache to exclude roots from the calling app.
- Add code to allow only system apps to use EXTRA_PACKAGE_NAME.

Change-Id: Ia7cc2a1a297676c7b26f6e583042a4607d8c9a4e

1 files changed, 25 insertions, 0 deletions

diff --git a/packages/DocumentsUI/tests/src/com/android/documentsui/RootsCacheTest.java b/packages/DocumentsUI/tests/src/com/android/documentsui/RootsCacheTest.java
index 7faa3ce..8c5bac1 100644
--- a/packages/DocumentsUI/tests/src/com/android/documentsui/RootsCacheTest.java
+++ b/packages/DocumentsUI/tests/src/com/android/documentsui/RootsCacheTest.java
@@ -114,6 +114,31 @@ public class RootsCacheTest extends AndroidTestCase {
                 RootsCache.getMatchingRoots(mRoots, mState));
     }
 
+    public void testExcludedAuthorities() throws Exception {
+        final List<RootInfo> roots = Lists.newArrayList();
+
+        // Set up some roots
+        for (int i = 0; i < 5; ++i) {
+            RootInfo root = new RootInfo();
+            root.authority = "authority" + i;
+            roots.add(root);
+        }
+        // Make some allowed authorities
+        List<RootInfo> allowedRoots = Lists.newArrayList(
+            roots.get(0), roots.get(2), roots.get(4));
+        // Set up the excluded authority list
+        for (RootInfo root: roots) {
+            if (!allowedRoots.contains(root)) {
+                mState.excludedAuthorities.add(root.authority);
+            }
+        }
+        mState.acceptMimes = new String[] { "*/*" };
+
+        assertContainsExactly(
+            allowedRoots,
+            RootsCache.getMatchingRoots(roots, mState));
+    }
+
     private static void assertContainsExactly(List<?> expected, List<?> actual) {
         assertEquals(expected.size(), actual.size());
         for (Object o : expected) {