Isolate Menu/Action management into dedicated manager classes.

We are now also returning fragmentTuner at the activity level, so that
directoryFragment does not have to do a .pick() logic depending on the
activity type. Rather, the logic lies within the activity itself.

Bug: 24416336
Change-Id: Idb200864f6c9468b9193781f6ac505b557ffbce9
(cherry picked from commit bc330a4bf53c3a766292097d1815b9abd469a945)

1 files changed, 87 insertions, 0 deletions

diff --git a/packages/DocumentsUI/src/com/android/documentsui/FilesMenuManager.java b/packages/DocumentsUI/src/com/android/documentsui/FilesMenuManager.java
new file mode 100644
index 000000000000..f7256ff4857d
--- /dev/null
+++ b/packages/DocumentsUI/src/com/android/documentsui/FilesMenuManager.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.documentsui;
+
+import android.view.Menu;
+import android.view.MenuItem;
+
+import com.android.documentsui.R;
+
+final class FilesMenuManager implements MenuManager {
+
+    private final SearchViewManager mSearchManager;
+
+    public FilesMenuManager(SearchViewManager searchManager) {
+        mSearchManager = searchManager;
+    }
+
+    @Override
+    public void updateActionMenu(Menu menu, SelectionDetails selection) {
+
+        menu.findItem(R.id.menu_open).setVisible(false); // "open" is never used in Files.
+
+        // Commands accessible only via keyboard...
+        MenuItem copy = menu.findItem(R.id.menu_copy_to_clipboard);
+        MenuItem paste = menu.findItem(R.id.menu_paste_from_clipboard);
+
+        // Commands visible in the UI...
+        MenuItem rename = menu.findItem(R.id.menu_rename);
+        MenuItem moveTo = menu.findItem(R.id.menu_move_to);
+        MenuItem copyTo = menu.findItem(R.id.menu_copy_to);
+        MenuItem share = menu.findItem(R.id.menu_share);
+        MenuItem delete = menu.findItem(R.id.menu_delete);
+
+        // Commands usually on action-bar, so we always manage visibility.
+        share.setVisible(!selection.containsDirectories() && !selection.containsPartialFiles());
+        delete.setVisible(selection.canDelete());
+
+        // Commands always in overflow, so we don't bother showing/hiding...
+        copyTo.setVisible(true);
+        moveTo.setVisible(true);
+        rename.setVisible(true);
+
+        // copy is not visible, keyboard only
+        copy.setEnabled(!selection.containsPartialFiles());
+
+        copyTo.setEnabled(!selection.containsPartialFiles());
+        moveTo.setEnabled(!selection.containsPartialFiles() && selection.canDelete());
+        rename.setEnabled(!selection.containsPartialFiles() && selection.canRename());
+
+        Menus.disableHiddenItems(menu, copy, paste);
+    }
+
+    @Override
+    public void updateOptionMenu(Menu menu, DirectoryDetails details) {
+
+        final MenuItem createDir = menu.findItem(R.id.menu_create_dir);
+        final MenuItem pasteFromCb = menu.findItem(R.id.menu_paste_from_clipboard);
+        final MenuItem settings = menu.findItem(R.id.menu_settings);
+        final MenuItem newWindow = menu.findItem(R.id.menu_new_window);
+
+        createDir.setVisible(true);
+        createDir.setEnabled(details.canCreateDirectory());
+        pasteFromCb.setEnabled(details.hasItemsToPaste());
+        settings.setVisible(details.hasRootSettings());
+        newWindow.setVisible(details.shouldShowFancyFeatures());
+
+        Menus.disableHiddenItems(menu, pasteFromCb);
+
+        // It hides icon if searching in progress
+        mSearchManager.updateMenu();
+    }
+
+}