Support filtering the repositories page list

app/res/layout/item_filter_list.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2012 GitHub Inc.
+
+  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.
+-->
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+    <EditText
+        android:id="@+id/et_filter"
+        style="@style/EditText"
+        android:layout_width="match_parent"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentTop="true"
+        android:layout_margin="2dp"
+        android:hint="@string/find_a_repository"
+        android:inputType="text|textNoSuggestions"
+        android:padding="6dp"
+        android:singleLine="true"
+        android:visibility="gone" />
+
+    <android.support.v4.widget.SwipeRefreshLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/swipe_item"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_below="@id/et_filter">
+
+        <ListView
+            android:id="@android:id/list"
+            style="@style/ListView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:visibility="gone" />
+
+    </android.support.v4.widget.SwipeRefreshLayout>
+
+    <TextView
+        android:id="@android:id/empty"
+        style="@style/ListSubtitleText"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:visibility="gone" />
+
+    <ProgressBar
+        android:id="@+id/pb_loading"
+        style="@style/Spinner"
+        android:layout_width="64dp"
+        android:layout_height="64dp"
+        android:layout_centerInParent="true" />
+
+</RelativeLayout>

app/res/values/strings.xml

@@ -210,6 +210,7 @@
     <string name="prefix_created">created\u0020</string>
     <string name="prefix_updated">updated\u0020</string>
     <string name="prefix_opened">opened\u0020</string>
+    <string name="find_a_repository">Find a Repository…</string>
     <string name="clear">Clear</string>
     <string name="pull_request_commits">Commits: %d</string>
     <string name="open_issues">Open Issues</string>

app/src/main/java/com/github/mobile/ui/ItemFilter.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright 2012 GitHub Inc.
+ *
+ * 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.github.mobile.ui;
+
+import static java.util.Locale.US;
+import android.text.TextUtils;
+import android.widget.Filter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Item filter
+ *
+ * @param <V>
+ */
+public abstract class ItemFilter<V> extends Filter {
+
+    private final ItemListAdapter<V, ?> adapter;
+
+    /**
+     * Create item filter
+     *
+     * @param adapter
+     */
+    public ItemFilter(ItemListAdapter<V, ?> adapter) {
+        this.adapter = adapter;
+    }
+
+    /**
+     * Does the value contain the filter text?
+     *
+     * @param filter
+     * @param value
+     * @return true if contains, false otherwise
+     */
+    protected boolean contains(final String filter, final String value) {
+        if (TextUtils.isEmpty(value))
+            return false;
+
+        final int fLength = filter.length();
+        final int vLength = value.length();
+        if (fLength > vLength)
+            return false;
+
+        int fIndex = 0;
+        int vIndex = 0;
+        while (vIndex < vLength)
+            if (filter.charAt(fIndex) == Character.toUpperCase(value
+                    .charAt(vIndex))) {
+                vIndex++;
+                fIndex++;
+                if (fIndex == fLength)
+                    return true;
+            } else {
+                vIndex += fIndex + 1;
+                fIndex = 0;
+            }
+        return false;
+    }
+
+    /**
+     * Is item match for prefix?
+     *
+     * @param prefix
+     * @param upperCasePrefix
+     * @param item
+     * @return true if match, false otherwise
+     */
+    protected abstract boolean isMatch(CharSequence prefix,
+            String upperCasePrefix, V item);
+
+    @Override
+    protected FilterResults performFiltering(CharSequence prefix) {
+        FilterResults results = new FilterResults();
+        if (TextUtils.isEmpty(prefix))
+            return results;
+
+        final List<V> initial = adapter.getInitialItems();
+        String upperPrefix = prefix.toString().toUpperCase(US);
+        List<V> filtered = new ArrayList<V>();
+        for (V item : initial)
+            if (isMatch(prefix, upperPrefix, item))
+                filtered.add(item);
+
+        results.values = filtered;
+        results.count = filtered.size();
+        return results;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    protected void publishResults(CharSequence constraint, FilterResults results) {
+        if (results.values != null)
+            adapter.setFilteredItems((List<V>) results.values);
+        else
+            adapter.setItems(adapter.getInitialItems());
+
+        if (results.count == 0)
+            adapter.notifyDataSetInvalidated();
+    }
+}

app/src/main/java/com/github/mobile/ui/ItemListAdapter.java

@@ -0,0 +1,172 @@
+/*
+ * Copyright 2012 GitHub Inc.
+ *
+ * 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.github.mobile.ui;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.Filter;
+import android.widget.Filterable;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * List adapter for items of a specific type
+ *
+ * @param <I>
+ * @param <V>
+ */
+public abstract class ItemListAdapter<I, V extends ItemView> extends
+        BaseAdapter implements Filterable {
+
+    private final LayoutInflater inflater;
+
+    private final int viewId;
+
+    private List<I> items;
+
+    private List<I> initialItems;
+
+    /**
+     * Create empty adapter
+     *
+     * @param viewId
+     * @param inflater
+     */
+    public ItemListAdapter(final int viewId, final LayoutInflater inflater) {
+        this(viewId, inflater, null);
+    }
+
+    /**
+     * Create adapter
+     *
+     * @param viewId
+     * @param inflater
+     * @param items
+     */
+    public ItemListAdapter(final int viewId, final LayoutInflater inflater,
+            final List<I> items) {
+        this.viewId = viewId;
+        this.inflater = inflater;
+        if (items != null)
+            this.items = items;
+        else
+            this.items = Collections.emptyList();
+        this.initialItems = this.items;
+    }
+
+    @Override
+    public boolean hasStableIds() {
+        return true;
+    }
+
+    /**
+     * Get items being displayed
+     *
+     * @return items
+     */
+    public List<I> getItems() {
+        return items;
+    }
+
+    public int getCount() {
+        return items.size();
+    }
+
+    public I getItem(int position) {
+        return items.get(position);
+    }
+
+    public long getItemId(int position) {
+        return getItem(position).hashCode();
+    }
+
+    /**
+     * @return initialItems
+     */
+    protected List<I> getInitialItems() {
+        return initialItems;
+    }
+
+    /**
+     * Set items
+     *
+     * @param items
+     * @return this adapter
+     */
+    public ItemListAdapter<I, V> setItems(final List<I> items) {
+        if (items != null)
+            this.items = items;
+        else
+            this.items = Collections.emptyList();
+        initialItems = this.items;
+        notifyDataSetChanged();
+        return this;
+    }
+
+    /**
+     * Set filtered items to display
+     *
+     * @param items
+     * @return this adapter
+     */
+    public ItemListAdapter<I, V> setFilteredItems(final List<I> items) {
+        if (items != null)
+            this.items = items;
+        else
+            this.items = Collections.emptyList();
+        notifyDataSetChanged();
+        return this;
+    }
+
+    /**
+     * Update view to display item
+     *
+     * @param position
+     * @param view
+     * @param item
+     */
+    protected abstract void update(int position, V view, I item);
+
+    /**
+     * Create empty item view
+     *
+     * @param view
+     * @return item
+     */
+    protected abstract V createView(View view);
+
+    @Override
+    public View getView(final int position, View convertView,
+            final ViewGroup parent) {
+        @SuppressWarnings("unchecked")
+        V view = convertView != null ? (V) convertView.getTag() : null;
+        if (view == null) {
+            convertView = inflater.inflate(viewId, null);
+            view = createView(convertView);
+            convertView.setTag(view);
+        }
+        update(position, view, getItem(position));
+        return convertView;
+    }
+
+    @Override
+    public Filter getFilter() {
+        return null;
+    }
+}