Moving apps search related logic into a custom layout file

This will allow derivative projects to easily change the search behavior
by simply overriding the xml file

Bug: 37616877
Change-Id: Ib8d6a2dab06819a52611e9a3d97c70c5a49bbf97

1 files changed, 195 insertions, 0 deletions

diff --git a/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java b/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
new file mode 100644
index 000000000..116ec8866
--- /dev/null
+++ b/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2017 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.launcher3.allapps.search;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.text.Selection;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.SpannableStringBuilder;
+import android.text.TextUtils;
+import android.text.method.TextKeyListener;
+import android.util.AttributeSet;
+import android.view.KeyEvent;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.ExtendedEditText;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.R;
+import com.android.launcher3.allapps.AllAppsGridAdapter;
+import com.android.launcher3.allapps.AllAppsRecyclerView;
+import com.android.launcher3.allapps.AlphabeticalAppsList;
+import com.android.launcher3.allapps.SearchUiManager;
+import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.discovery.AppDiscoveryItem;
+import com.android.launcher3.discovery.AppDiscoveryUpdateState;
+import com.android.launcher3.graphics.TintedDrawableSpan;
+import com.android.launcher3.util.ComponentKey;
+
+import java.util.ArrayList;
+
+/**
+ * Layout to contain the All-apps search UI.
+ */
+public class AppsSearchContainerLayout extends FrameLayout
+        implements SearchUiManager, AllAppsSearchBarController.Callbacks {
+
+    private final Launcher mLauncher;
+    private final int mMinHeight;
+    private final AllAppsSearchBarController mSearchBarController;
+    private final SpannableStringBuilder mSearchQueryBuilder;
+    private final HeaderElevationController mElevationController;
+
+    private ExtendedEditText mSearchInput;
+    private AlphabeticalAppsList mApps;
+    private AllAppsRecyclerView mAppsRecyclerView;
+    private AllAppsGridAdapter mAdapter;
+
+    public AppsSearchContainerLayout(Context context) {
+        this(context, null);
+    }
+
+    public AppsSearchContainerLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public AppsSearchContainerLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+
+        mLauncher = Launcher.getLauncher(context);
+        mMinHeight = getResources().getDimensionPixelSize(R.dimen.all_apps_search_bar_height);
+        mSearchBarController = new AllAppsSearchBarController();
+        mElevationController = new HeaderElevationController(this);
+
+        mSearchQueryBuilder = new SpannableStringBuilder();
+        Selection.setSelection(mSearchQueryBuilder, 0);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mSearchInput = findViewById(R.id.search_box_input);
+
+        // Update the hint to contain the icon.
+        // Prefix the original hint with two spaces. The first space gets replaced by the icon
+        // using span. The second space is used for a singe space character between the hint
+        // and the icon.
+        SpannableString spanned = new SpannableString("  " + mSearchInput.getHint());
+        spanned.setSpan(new TintedDrawableSpan(getContext(), R.drawable.ic_allapps_search),
+                0, 1, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
+        mSearchInput.setHint(spanned);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        if (FeatureFlags.LAUNCHER3_ALL_APPS_PULL_UP &&
+                !mLauncher.getDeviceProfile().isVerticalBarLayout()) {
+            getLayoutParams().height = mLauncher.getDragLayer().getInsets().top + mMinHeight;
+        }
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+    }
+
+
+    @Override
+    public void initialize(
+            AlphabeticalAppsList appsList, AllAppsRecyclerView recyclerView) {
+        mApps = appsList;
+        mAppsRecyclerView = recyclerView;
+        mAppsRecyclerView.addOnScrollListener(mElevationController);
+        mAdapter = (AllAppsGridAdapter) mAppsRecyclerView.getAdapter();
+
+        mSearchBarController.initialize(appsList, mSearchInput, mLauncher, this);
+    }
+
+    @Override
+    public void refreshSearchResult() {
+        mSearchBarController.refreshSearchResult();
+    }
+
+    @Override
+    public void reset() {
+        mElevationController.reset();
+        mSearchBarController.reset();
+    }
+
+    @Override
+    public void preDispatchKeyEvent(KeyEvent event) {
+        // Determine if the key event was actual text, if so, focus the search bar and then dispatch
+        // the key normally so that it can process this key event
+        if (!mSearchBarController.isSearchFieldFocused() &&
+                event.getAction() == KeyEvent.ACTION_DOWN) {
+            final int unicodeChar = event.getUnicodeChar();
+            final boolean isKeyNotWhitespace = unicodeChar > 0 &&
+                    !Character.isWhitespace(unicodeChar) && !Character.isSpaceChar(unicodeChar);
+            if (isKeyNotWhitespace) {
+                boolean gotKey = TextKeyListener.getInstance().onKeyDown(this, mSearchQueryBuilder,
+                        event.getKeyCode(), event);
+                if (gotKey && mSearchQueryBuilder.length() > 0) {
+                    mSearchBarController.focusSearchField();
+                }
+            }
+        }
+    }
+
+    @Override
+    public boolean shouldRestoreImeState() {
+        return !TextUtils.isEmpty(mSearchInput.getText());
+    }
+
+    @Override
+    public void startAppsSearch() {
+        if (mApps != null) {
+            mSearchBarController.focusSearchField();
+        }
+    }
+
+    @Override
+    public void onSearchResult(String query, ArrayList<ComponentKey> apps) {
+        if (apps != null) {
+            mApps.setOrderedFilter(apps);
+            notifyResultChanged();
+            mAdapter.setLastSearchQuery(query);
+        }
+    }
+
+    @Override
+    public void clearSearchResult() {
+        if (mApps.setOrderedFilter(null)) {
+            notifyResultChanged();
+        }
+
+        // Clear the search query
+        mSearchQueryBuilder.clear();
+        mSearchQueryBuilder.clearSpans();
+        Selection.setSelection(mSearchQueryBuilder, 0);
+    }
+
+    @Override
+    public void onAppDiscoverySearchUpdate(
+            @Nullable AppDiscoveryItem app, @NonNull AppDiscoveryUpdateState state) {
+        if (!mLauncher.isDestroyed()) {
+            mApps.onAppDiscoverySearchUpdate(app, state);
+            notifyResultChanged();
+        }
+    }
+
+    private void notifyResultChanged() {
+        mElevationController.reset();
+        mAppsRecyclerView.onSearchResultsChanged();
+    }
+}