Merge pull request #843 from da-kid/master

Implemented Pull2Refresh

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListFragment.java

@@ -35,6 +35,7 @@ import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
 import android.support.v4.view.MenuItemCompat;
 import android.support.v4.widget.CursorAdapter;
+import android.support.v4.widget.SwipeRefreshLayout;
 import android.support.v7.app.ActionBarActivity;
 import android.support.v7.widget.SearchView;
 import android.view.ActionMode;
@@ -55,9 +56,13 @@ import android.widget.TextView;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.helper.ExportHelper;
+import org.sufficientlysecure.keychain.helper.KeyUpdateHelper;
+import org.sufficientlysecure.keychain.helper.Preferences;
 import org.sufficientlysecure.keychain.pgp.KeyRing;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
+import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
 import org.sufficientlysecure.keychain.ui.dialog.DeleteKeyDialogFragment;
+import org.sufficientlysecure.keychain.ui.widget.ListAwareSwipeRefreshLayout;
 import org.sufficientlysecure.keychain.util.Highlighter;
 import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.Notify;
@@ -74,10 +79,11 @@ import se.emilsjolander.stickylistheaders.StickyListHeadersListView;
  */
 public class KeyListFragment extends LoaderFragment
         implements SearchView.OnQueryTextListener, AdapterView.OnItemClickListener,
-        LoaderManager.LoaderCallbacks<Cursor> {
+        LoaderManager.LoaderCallbacks<Cursor>, SwipeRefreshLayout.OnRefreshListener {
 
     private KeyListAdapter mAdapter;
     private StickyListHeadersListView mStickyList;
+    private ListAwareSwipeRefreshLayout mSwipeRefreshLayout;
 
     // saves the mode object for multiselect, needed for reset at some point
     private ActionMode mActionMode = null;
@@ -120,9 +126,25 @@ public class KeyListFragment extends LoaderFragment
             }
         });
 
+        mSwipeRefreshLayout = (ListAwareSwipeRefreshLayout) view.findViewById(R.id.key_list_swipe_container);
+        mSwipeRefreshLayout.setOnRefreshListener(this);
+        mSwipeRefreshLayout.setColorScheme(
+                R.color.android_purple_dark,
+                R.color.android_purple_light,
+                R.color.android_purple_dark,
+                R.color.android_purple_light);
+        mSwipeRefreshLayout.setStickyListHeadersListView(mStickyList);
+
         return root;
     }
 
+    @Override
+    public void onResume() {
+        String[] servers = Preferences.getPreferences(getActivity()).getKeyServers();
+        mSwipeRefreshLayout.setIsLocked(servers == null || servers.length == 0 || servers[0] == null);
+        super.onResume();
+    }
+
     /**
      * Define Adapter and Loader on create of Activity
      */
@@ -690,4 +712,16 @@ public class KeyListFragment extends LoaderFragment
 
     }
 
+    /**
+     * Implements OnRefreshListener for drag-to-refresh
+     */
+    public void onRefresh() {
+        KeyUpdateHelper updateHelper = new KeyUpdateHelper();
+        KeychainIntentServiceHandler finishedHandler = new KeychainIntentServiceHandler(getActivity()) {
+            public void handleMessage(Message message) {
+                mSwipeRefreshLayout.setRefreshing(false);
+            }
+        };
+        updateHelper.updateAllKeys(getActivity(), finishedHandler);
+    }
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/ListAwareSwipeRefreshLayout.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2014 Daniel Albert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.widget;
+
+import android.content.Context;
+import android.support.v4.widget.SwipeRefreshLayout;
+import android.util.AttributeSet;
+
+import org.sufficientlysecure.keychain.util.Log;
+
+import se.emilsjolander.stickylistheaders.StickyListHeadersListView;
+
+public class ListAwareSwipeRefreshLayout extends SwipeRefreshLayout {
+
+
+    private StickyListHeadersListView mStickyListHeadersListView = null;
+    private boolean mIsLocked = false;
+
+    /**
+     * Constructors
+     */
+    public ListAwareSwipeRefreshLayout(Context context) {
+        super(context);
+    }
+    public ListAwareSwipeRefreshLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    /**
+     * Getters / Setters
+     */
+    public void setStickyListHeadersListView(StickyListHeadersListView stickyListHeadersListView) {
+        mStickyListHeadersListView = stickyListHeadersListView;
+    }
+    public StickyListHeadersListView getStickyListHeadersListView() {
+        return mStickyListHeadersListView;
+    }
+
+    public void setIsLocked(boolean locked) {
+        mIsLocked = locked;
+        Log.d("ListAwareSwipeRefreshLayout", (mIsLocked ? "is locked" : "not locked"));
+    }
+    public boolean getIsLocked() {
+        return mIsLocked;
+    }
+
+    @Override
+    public boolean canChildScrollUp() {
+        if (mStickyListHeadersListView == null)
+            return super.canChildScrollUp();
+
+        return (
+            mIsLocked
+            ||
+            (
+                mStickyListHeadersListView.getWrappedList().getChildCount() > 0
+                &&
+                (
+                    mStickyListHeadersListView.getTop() > 0
+                    ||
+                    mStickyListHeadersListView.getFirstVisiblePosition() > 0
+                )
+            )
+        );
+    }
+}