🔍 Clean up the search widget code

chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchActivity.java

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.searchwidget;
 
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.animation.ValueAnimator;
 import android.content.Intent;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Handler;
 import android.support.customtabs.CustomTabsIntent;
 import android.support.v4.app.ActivityOptionsCompat;
 import android.text.TextUtils;
-import android.view.Gravity;
+import android.view.LayoutInflater;
 import android.view.View;
-import android.view.View.MeasureSpec;
 import android.view.ViewGroup;
-import android.view.ViewGroup.LayoutParams;
-import android.view.ViewStub;
-import android.widget.FrameLayout;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.ContextUtils;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.WebContentsFactory;
 import org.chromium.chrome.browser.WindowDelegate;
 import org.chromium.chrome.browser.customtabs.CustomTabsConnection;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.init.AsyncInitializationActivity;
 import org.chromium.chrome.browser.init.ChromeBrowserInitializer;
 import org.chromium.chrome.browser.omnibox.AutocompleteController;
 import org.chromium.chrome.browser.omnibox.UrlBar;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.snackbar.SnackbarManager.SnackbarManageable;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tab.TabDelegateFactory;
 import org.chromium.chrome.browser.tab.TabIdManager;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
 import org.chromium.chrome.browser.util.IntentUtils;
-import org.chromium.chrome.browser.widget.FadingBackgroundView;
 import org.chromium.components.url_formatter.UrlFormatter;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.ui.UiUtils;
 import org.chromium.ui.base.ActivityWindowAndroid;
 
 /** Prototype that queries the user's default search engine and shows autocomplete suggestions. */
 public class SearchActivity extends AsyncInitializationActivity
-        implements SnackbarManageable, SearchLocationBarLayout.Delegate,
+        implements SnackbarManageable, SearchActivityLocationBarLayout.Delegate,
                    View.OnLayoutChangeListener {
     private static final String TAG = "searchwidget";
 
-    /** How long the animation should run for. */
-    private static final int ANIMATION_DURATION_MS = 200;
-
     /** Padding gleaned from the background Drawable of the search box. */
     private final Rect mSearchBoxPadding = new Rect();
 
-    /** Location of the search box on the home screen. */
-    private Rect mSearchBoxWidgetBounds;
-
-    /** Small margin/padding used for the search box. */
-    private int mSpacingSmall;
-
     /** Medium margin/padding used for the search box. */
     private int mSpacingMedium;
 
     /** Large margin/padding used for the search box. */
     private int mSpacingLarge;
 
-    /**
-     * View that the omnibox suggestion list anchors to. This is different from the main search box
-     * because the upstream LocationBarLayout code expects a full white box instead of a floating
-     * box with shadows.
-     */
-    private View mAnchorView;
-
-    /** See {@link BoxAnimatorScrim}. */
-    private BoxAnimatorScrim mScrimView;
-
     /** Main content view. */
     private ViewGroup mContentView;
 
-    /** Whether or not the library has begun loading. */
-    private boolean mIsNativeLoading;
-
     /** Whether the native library has been loaded. */
     private boolean mIsNativeReady;
 
     /** Input submitted before before the native library was loaded. */
     private String mQueuedUrl;
 
-    /** Animates the SearchActivity's controls moving into place. */
-    private ValueAnimator mAnimator;
-
     /** The View that represents the search box. */
-    private SearchLocationBarLayout mSearchBox;
+    private SearchActivityLocationBarLayout mSearchBox;
 
     private UrlBar mUrlBar;
 
     private SearchBoxDataProvider mSearchBoxDataProvider;
 
     private SnackbarManager mSnackbarManager;
     private ActivityWindowAndroid mWindowAndroid;
     private Tab mTab;
 
     @Override
     public void backKeyPressed() {
         finish();
     }
 
     @Override
     public void onStop() {
         finish();
         super.onStop();
     }
 
     @Override
     public void finish() {
-        if (SearchWidgetProvider.ANIMATE_TRANSITION) {
-            // Update the search widgets so that they all show up as opaque again.
-            SearchWidgetProvider.setLaunchingWidgetId(SearchWidgetProvider.INVALID_WIDGET_ID);
-            SearchWidgetProvider.updateAllWidgets();
-        }
-
         super.finish();
         overridePendingTransition(0, android.R.anim.fade_out);
     }
 
     @Override
     protected boolean shouldDelayBrowserStartup() {
         return true;
     }
 
     @Override
     public boolean onActivityResultWithNative(int requestCode, int resultCode, Intent intent) {
         if (super.onActivityResultWithNative(requestCode, resultCode, intent)) return true;
         boolean result = mWindowAndroid.onActivityResult(requestCode, resultCode, intent);
 
         // The voice query should have completed.  If the voice recognition isn't confident about
         // what it heard, it puts the query into the omnibox.  We need to focus it at that point.
         if (mUrlBar != null) focusTextBox(false);
 
         return result;
     }
 
     @Override
     protected void setContentView() {
         initializeDimensions();
 
         mWindowAndroid = new ActivityWindowAndroid(this);
         mSnackbarManager = new SnackbarManager(this);
+        mSearchBoxDataProvider = new SearchBoxDataProvider();
 
-        // Build the Views that {@link SearchLocationBarLayout} expects to exist.
-        ViewStub resultsStub = new ViewStub(this);
-        resultsStub.setId(R.id.omnibox_results_container_stub);
-        resultsStub.setLayoutResource(R.layout.omnibox_results_container);
-
-        // The FadingBackgroundView isn't used here, but is still animated by the LocationBarLayout.
-        // This interferes with the animation we need to show the widget moving to the right place.
-        FadingBackgroundView fadingView = new FadingBackgroundView(this, null) {
-            @Override
-            public void showFadingOverlay() {}
-            @Override
-            public void hideFadingOverlay(boolean fadeOut) {}
-        };
-
-        fadingView.setId(R.id.fading_focus_target);
-        FrameLayout.LayoutParams fadingBackgroundLayoutParams = new FrameLayout.LayoutParams(0, 0);
-
-        // Add an empty view to prevent crashing.
-        ViewGroup bottomContainer = new FrameLayout(this);
-        bottomContainer.setId(R.id.bottom_container);
-
-        // Build the search box, set it to invisible until the animation is done.
-        mSearchBox = new SearchLocationBarLayout(this, null);
-        mSearchBox.setDelegate(this);
-        mSearchBox.setVisibility(mSearchBoxWidgetBounds == null ? View.VISIBLE : View.INVISIBLE);
-        mSearchBox.setBackgroundResource(R.drawable.card_single);
-        mSearchBox.setPadding(mSpacingLarge, mSpacingMedium, mSpacingLarge, mSpacingMedium);
-        mSearchBox.initializeControls(new WindowDelegate(getWindow()), mWindowAndroid);
-        mSearchBox.setUrlBarFocusable(true);
-        mSearchBoxDataProvider = new SearchBoxDataProvider();
-        mSearchBox.setToolbarDataProvider(mSearchBoxDataProvider);
-        FrameLayout.LayoutParams searchParams =
-                new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
-        ApiCompatibilityUtils.setMarginStart(searchParams, mSpacingSmall);
-        ApiCompatibilityUtils.setMarginEnd(searchParams, mSpacingSmall);
-        searchParams.topMargin = mSpacingSmall;
-
-        // The scrim animates the search box moving into place.
-        mScrimView = new BoxAnimatorScrim(this, null);
-        mScrimView.setOnClickListener(new View.OnClickListener() {
+        mContentView = createContentView(mSearchBox);
+        mContentView.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                // Don't allow clicking on the scrim until the animation completes.
-                if (mScrimView.getInterpolatedValue() < 1.0f) return;
-
                 // Finish the Activity if the user clicks on the scrim.
                 finish();
             }
         });
-        if (!SearchWidgetProvider.ANIMATE_TRANSITION) mScrimView.setInterpolatedValue(1.0f);
 
-        // The anchor view puts the omnibox suggestions in the correct place, visually.
-        mAnchorView = new View(this);
-        mAnchorView.setId(R.id.toolbar);
-        mAnchorView.setClickable(true);
-        FrameLayout.LayoutParams anchorParams =
-                new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
-        anchorParams.gravity = Gravity.CENTER_HORIZONTAL;
+        // Build the search box.
+        mSearchBox = (SearchActivityLocationBarLayout) mContentView.findViewById(
+                R.id.search_location_bar);
+        mSearchBox.setDelegate(this);
+        mSearchBox.setPadding(mSpacingLarge, mSpacingMedium, mSpacingLarge, mSpacingMedium);
+        mSearchBox.initializeControls(new WindowDelegate(getWindow()), mWindowAndroid);
+        mSearchBox.setUrlBarFocusable(true);
+        mSearchBox.setToolbarDataProvider(mSearchBoxDataProvider);
 
-        // Initialize and build the View hierarchy.
-        mContentView = createContentView(mSearchBox);
-        mContentView.addView(fadingView, fadingBackgroundLayoutParams);
-        mContentView.addView(mScrimView);
-        mContentView.addView(resultsStub);
-        mContentView.addView(mAnchorView, anchorParams);
-        mContentView.addView(mSearchBox, searchParams);
-        mContentView.addView(bottomContainer);
         setContentView(mContentView);
         mUrlBar = (UrlBar) mSearchBox.findViewById(R.id.url_bar);
-
-        mSearchBox.setShowCachedZeroSuggestResults(true);
     }
 
     @Override
     public void finishNativeInitialization() {
         super.finishNativeInitialization();
         mIsNativeReady = true;
 
         mTab = new Tab(TabIdManager.getInstance().generateValidId(Tab.INVALID_TAB_ID),
                 Tab.INVALID_TAB_ID, false, this, mWindowAndroid, TabLaunchType.FROM_EXTERNAL_APP,
                 null, null);
         mTab.initialize(WebContentsFactory.createWebContents(false, false), null,
                 new TabDelegateFactory(), false, false);
         mTab.loadUrl(new LoadUrlParams("about:blank"));
         mSearchBoxDataProvider.onNativeLibraryReady(mTab);
         mSearchBox.onNativeLibraryReady();
         mSearchBox.setAutocompleteProfile(Profile.getLastUsedProfile().getOriginalProfile());
+        mSearchBox.setShowCachedZeroSuggestResults(true);
 
         if (mQueuedUrl != null) loadUrl(mQueuedUrl);
 
         new Handler().post(new Runnable() {
             @Override
             public void run() {
                 onDeferredStartup();
             }
         });
     }
@@ skipping 37 matching lines @@
             focusTextBox(true);
         }
     }
 
     @Override
     protected void onDestroy() {
         if (mTab != null && mTab.isInitialized()) mTab.destroy();
         super.onDestroy();
     }
 
     private void focusTextBox(boolean clearQuery) {

[Yusuf, 2017/04/07 18:08:28]

maybe this should be in the SearchLocationBar class itself?

[gone, 2017/04/07 18:15:26]

Talked offline:
There's a lot more cleanup to be done in this class.  Will punt for a followup.

         if (mIsNativeReady) mSearchBox.onUrlFocusChange(true);
+
+        if (clearQuery) {
+            mUrlBar.setIgnoreTextChangesForAutocomplete(true);
+            mUrlBar.setUrl("", null);
+            mUrlBar.setIgnoreTextChangesForAutocomplete(false);
+        }
         mUrlBar.setCursorVisible(true);
-        mUrlBar.setIgnoreTextChangesForAutocomplete(true);
-        if (clearQuery) mUrlBar.setUrl("", null);
-        mUrlBar.setIgnoreTextChangesForAutocomplete(false);
         mUrlBar.setSelection(0, mUrlBar.getText().length());
         new Handler().post(new Runnable() {
             @Override
             public void run() {
                 UiUtils.showKeyboard(mUrlBar);
             }
         });
     }
 
     @Override
@@ skipping 28 matching lines @@
         startActivity(intent,
                 ActivityOptionsCompat
                         .makeCustomAnimation(this, android.R.anim.fade_in, android.R.anim.fade_out)
                         .toBundle());
         finish();
     }
 
     private ViewGroup createContentView(final View searchBox) {
         assert mContentView == null;
 
-        ViewGroup contentView = new FrameLayout(this) {
-            @Override
-            public void onMeasure(int widthSpec, int heightSpec) {
-                super.onMeasure(widthSpec, heightSpec);
-                if (mAnchorView == null) return;
-
-                // Calculate how big the box is without shadow-induced padding.
-                FrameLayout.LayoutParams anchorParams =
-                        (FrameLayout.LayoutParams) mAnchorView.getLayoutParams();
-                int anchorViewWidth = searchBox.getMeasuredWidth() - mSearchBoxPadding.left
-                        - mSearchBoxPadding.right;
-                int anchorViewHeight =
-                        mSpacingSmall + mSearchBox.getMeasuredHeight() - mSearchBoxPadding.bottom;
-                if (anchorParams.width == anchorViewWidth
-                        && anchorParams.height == anchorViewHeight) {
-                    return;
-                }
-
-                // Move the anchor view up a little bit as a dirty hack until we can add a
-                // dimension. This allows the suggestion list to move up past the rounded corners of
-                // the search box.
-                anchorParams.topMargin = -(mSpacingSmall / 4);
-                anchorParams.width = anchorViewWidth;
-                anchorParams.height = anchorViewHeight;
-
-                // Measure the anchor view to match the search box's height without its side or
-                // bottom shadow padding. This isn't exactly what we need, but it's hard to get the
-                // correct behavior because LocationBarLayout overrides how the suggestions are
-                // laid out.
-                int anchorWidthSpec =
-                        MeasureSpec.makeMeasureSpec(anchorViewWidth, MeasureSpec.EXACTLY);
-                int anchorHeightSpec =
-                        MeasureSpec.makeMeasureSpec(anchorViewHeight, MeasureSpec.EXACTLY);
-                measureChild(mAnchorView, anchorWidthSpec, anchorHeightSpec);
-            }
-        };
-
+        ViewGroup contentView = (ViewGroup) LayoutInflater.from(this).inflate(
+                R.layout.search_activity, null, false);
         contentView.addOnLayoutChangeListener(this);
-        contentView.setId(R.id.control_container);
         return contentView;
     }
 
     @Override
     public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
             int oldTop, int oldRight, int oldBottom) {
-        if (mSearchBoxWidgetBounds != null) {
-            if (mAnimator == null) initializeAnimation();
-        } else {
-            // If there's no animation, then we can load the library immediately without worrying
-            // about jank.
-            beginLoadingLibrary();
-        }
         mContentView.removeOnLayoutChangeListener(this);
+        beginLoadingLibrary();
     }
 
     private void initializeDimensions() {
-        mSearchBoxWidgetBounds = getIntent().getSourceBounds();
-
         // Cache the padding of the Drawable that is used as the background for the search box.
         Drawable searchBackground =
                 ApiCompatibilityUtils.getDrawable(getResources(), R.drawable.card_single);
         searchBackground.getPadding(mSearchBoxPadding);
 
         // TODO(dfalcantara): Add values to the XML files instead of reusing random ones.
-        mSpacingSmall = getResources().getDimensionPixelSize(
-                R.dimen.tablet_toolbar_start_padding_no_buttons);
         mSpacingMedium =
                 getResources().getDimensionPixelSize(R.dimen.location_bar_incognito_badge_padding);
         mSpacingLarge =
                 getResources().getDimensionPixelSize(R.dimen.contextual_search_peek_promo_padding);
     }
 
-    private void initializeAnimation() {
-        assert SearchWidgetProvider.ANIMATE_TRANSITION;
-
-        // The bounds of the home screen widget are given in window space coordinates, so they need
-        // to be converted into conrdinates that are relative from the root View.  The converted
-        // bounds are used to animate the box moving from its widget location to the location at the
-        // top of the screen.
-        int[] rootWindowLocation = new int[2];
-        mContentView.getLocationInWindow(rootWindowLocation);
-
-        final Rect sourceRect = new Rect();
-        sourceRect.left = mSearchBoxWidgetBounds.left - rootWindowLocation[0];
-        sourceRect.right = mSearchBoxWidgetBounds.right - rootWindowLocation[0];
-        sourceRect.top = mSearchBoxWidgetBounds.top - rootWindowLocation[1];
-        sourceRect.bottom = mSearchBoxWidgetBounds.bottom - rootWindowLocation[1];
-
-        int[] targetBoxLocation = new int[2];
-        mSearchBox.getLocationInWindow(targetBoxLocation);
-        final Rect targetRect = new Rect();
-        targetRect.left = targetBoxLocation[0] - rootWindowLocation[0];
-        targetRect.right = targetRect.left + mSearchBox.getMeasuredWidth();
-        targetRect.top = targetBoxLocation[1] - rootWindowLocation[1];
-        targetRect.bottom = targetRect.top + mSearchBox.getMeasuredHeight();
-
-        mScrimView.setAnimationRects(sourceRect, targetRect);
-
-        mAnimator = ValueAnimator.ofFloat(0, 1);
-        mAnimator.setDuration(ANIMATION_DURATION_MS);
-        mAnimator.addListener(new AnimatorListenerAdapter() {
-            @Override
-            public void onAnimationStart(Animator animation) {
-                // Make the widget on the homescreen hide itself.
-                SearchWidgetProvider.updateAllWidgets();
-            }
-
-            @Override
-            public void onAnimationEnd(Animator animation) {
-                // Defer loading the library until the box is in the right place to prevent jank.
-                beginLoadingLibrary();
-            }
-        });
-        mAnimator.addUpdateListener(mScrimView);
-
-        new Handler().post(new Runnable() {
-            @Override
-            public void run() {
-                mAnimator.start();
-            }
-        });
-    }
-
     private void beginLoadingLibrary() {
-        if (mIsNativeLoading) return;
-        mIsNativeLoading = true;
-
-        // Show the real search box and let the user type in it.
-        mScrimView.setInterpolatedValue(1.0f);
-        mSearchBox.setVisibility(View.VISIBLE);
         beginQuery();
         mHandler.post(new Runnable() {
             @Override
             public void run() {
                 mSearchBox.showCachedZeroSuggestResultsIfAvailable();
             }
         });
         ChromeBrowserInitializer.getInstance(getApplicationContext())
                 .handlePreNativeStartup(SearchActivity.this);
     }
 }