[Home] Add flag to show pull-to-refresh IPH at top

When the flag is enabled, the pull-to-refresh in-product help bubble is
shown at the top of the screen rather than anchored to the bottom
toolbar.

ArrowBubbleDrawable was modified to support not drawing an arrow.

BUG=793403

Change-Id: I86d753a1eb7a193576f4523de6dd5f01a1a4c145
Reviewed-on: https://chromium-review.googlesource.com/817882
Commit-Queue: Theresa <twellington@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523791}

chrome/android/java/src/org/chromium/chrome/browser/ChromeFeatureList.java

@@ -173,6 +173,8 @@ public abstract class ChromeFeatureList {
     public static final String CHROME_HOME_PROMO = "ChromeHomePromo";
     public static final String CHROME_HOME_PROMO_INFO_ONLY = "ChromeHomePromoInfoOnly";
     public static final String CHROME_HOME_PROMO_ON_STARTUP = "ChromeHomePromoOnStartup";
+    public static final String CHROME_HOME_PULL_TO_REFRESH_IPH_AT_TOP =
+            "ChromeHomePullToRefreshIphAtTop";
     public static final String CHROME_HOME_SHOW_GOOGLE_G_WHEN_URL_CLEARED =
             "ChromeHomeShowGoogleGWhenUrlCleared";
     public static final String CHROME_HOME_SURVEY = "ChromeHomeSurvey";

chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java

@@ -55,7 +55,7 @@ import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.MathUtils;
 import org.chromium.chrome.browser.widget.FadingBackgroundView;
 import org.chromium.chrome.browser.widget.bottomsheet.BottomSheetContentController.ContentType;
-import org.chromium.chrome.browser.widget.textbubble.ViewAnchoredTextBubble;
+import org.chromium.chrome.browser.widget.textbubble.TextBubble;
 import org.chromium.content.browser.BrowserStartupController;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content_public.browser.LoadUrlParams;
@@ -1702,7 +1702,7 @@ public class BottomSheet
      * @return The bottom sheet's help bubble if it exists.
      */
     @VisibleForTesting
-    public @Nullable ViewAnchoredTextBubble getHelpBubbleForTests() {
+    public @Nullable TextBubble getHelpBubbleForTests() {
         return getIphBubbleController().getHelpBubbleForTests();
     }
 }

chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/ChromeHomeIphBubbleController.java

@@ -5,8 +5,10 @@
 package org.chromium.chrome.browser.widget.bottomsheet;
 
 import android.content.Context;
+import android.graphics.Rect;
 import android.support.annotation.Nullable;
 import android.view.View;
+import android.view.View.OnLayoutChangeListener;
 import android.widget.PopupWindow.OnDismissListener;
 
 import org.chromium.base.Callback;
@@ -22,6 +24,7 @@ import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.toolbar.BottomToolbarPhone;
 import org.chromium.chrome.browser.widget.ViewHighlighter;
 import org.chromium.chrome.browser.widget.bottomsheet.BottomSheet.StateChangeReason;
+import org.chromium.chrome.browser.widget.textbubble.TextBubble;
 import org.chromium.chrome.browser.widget.textbubble.ViewAnchoredTextBubble;
 import org.chromium.components.feature_engagement.EventConstants;
 import org.chromium.components.feature_engagement.FeatureConstants;
@@ -41,7 +44,7 @@ public class ChromeHomeIphBubbleController {
      */
     private static final String HELP_BUBBLE_TIMEOUT_PARAM_NAME = "x_iph-timeout-duration-ms";
 
-    private ViewAnchoredTextBubble mHelpBubble;
+    private TextBubble mHelpBubble;
     private LayoutManagerChrome mLayoutManager;
     private BottomToolbarPhone mToolbar;
     private View mControlContainer;
@@ -67,7 +70,7 @@ public class ChromeHomeIphBubbleController {
         mBottomSheet.addObserver(new EmptyBottomSheetObserver() {
             @Override
             public void onSheetOpened(@StateChangeReason int reason) {
-                if (mHelpBubble != null) mHelpBubble.dismiss();
+                dismissHelpBubble();
 
                 Tracker tracker = TrackerFactory.getTrackerForProfile(Profile.getLastUsedProfile());
                 tracker.notifyEvent(EventConstants.BOTTOM_SHEET_EXPANDED);
@@ -149,14 +152,23 @@ public class ChromeHomeIphBubbleController {
         if (!fromMenu && !showRefreshIph && !showColdStartIph) return;
 
         // Determine which strings to use.
+        boolean showAtTopOfScreen = showRefreshIph
+                && ChromeFeatureList.isEnabled(
+                           ChromeFeatureList.CHROME_HOME_PULL_TO_REFRESH_IPH_AT_TOP);
         boolean showExpandButtonHelpBubble = !showRefreshIph && mToolbar.isUsingExpandButton();
         View anchorView = showExpandButtonHelpBubble
                 ? mControlContainer.findViewById(R.id.expand_sheet_button)
                 : mControlContainer;
-        int stringId = showRefreshIph ? R.string.bottom_sheet_pull_to_refresh_help_bubble_message
-                                      : showExpandButtonHelpBubble
-                        ? R.string.bottom_sheet_accessibility_expand_button_help_bubble_message
-                        : R.string.bottom_sheet_help_bubble_message;
+        int stringId = 0;
+        if (showRefreshIph) {
+            stringId = showAtTopOfScreen
+                    ? R.string.bottom_sheet_pull_to_refresh_help_bubble_accessibility_message
+                    : R.string.bottom_sheet_pull_to_refresh_help_bubble_message;
+        } else if (showExpandButtonHelpBubble) {
+            stringId = R.string.bottom_sheet_accessibility_expand_button_help_bubble_message;
+        } else {
+            stringId = R.string.bottom_sheet_help_bubble_message;
+        }
         int accessibilityStringId = showRefreshIph
                 ? R.string.bottom_sheet_pull_to_refresh_help_bubble_accessibility_message
                 : stringId;
@@ -166,7 +178,7 @@ public class ChromeHomeIphBubbleController {
         EmptyOverviewModeObserver overviewModeObserver = new EmptyOverviewModeObserver() {
             @Override
             public void onOverviewModeStartedShowing(boolean showToolbar) {
-                mHelpBubble.dismiss();
+                dismissHelpBubble();
             }
         };
         mLayoutManager.addOverviewModeObserver(overviewModeObserver);
@@ -176,8 +188,29 @@ public class ChromeHomeIphBubbleController {
                 mFullscreenManager.getBrowserVisibilityDelegate().showControlsPersistent();
 
         // Create the help bubble and setup dismissal behavior.
+        View topAnchorView = (View) mBottomSheet.getParent();
+        OnLayoutChangeListener topAnchorLayoutChangeListener = new OnLayoutChangeListener() {
+            @Override
+            public void onLayoutChange(View v, int left, int top, int right, int bottom,
+                    int oldLeft, int oldTop, int oldRight, int oldBottom) {
+                if (left != oldLeft || right != oldRight || top != oldTop || bottom != oldBottom) {
+                    dismissHelpBubble();
+                }
+            }
+        };
+
+        if (showAtTopOfScreen) {
             mHelpBubble =
-                new ViewAnchoredTextBubble(mContext, anchorView, stringId, accessibilityStringId);
+                    new TextBubble(mContext, topAnchorView, stringId, accessibilityStringId, false);
+            mHelpBubble.setAnchorRect(getTopAnchorRect(topAnchorView));
+            topAnchorView.addOnLayoutChangeListener(topAnchorLayoutChangeListener);
+        } else {
+            mHelpBubble = new ViewAnchoredTextBubble(
+                    mContext, anchorView, stringId, accessibilityStringId);
+            int inset = mContext.getResources().getDimensionPixelSize(
+                    R.dimen.bottom_sheet_help_bubble_inset);
+            ((ViewAnchoredTextBubble) mHelpBubble).setInsetPx(0, inset, 0, inset);
+        }
 
         if (ChromeFeatureList.isEnabled(ChromeFeatureList.CHROME_HOME_PERSISTENT_IPH)) {
             int dismissTimeout = ChromeFeatureList.getFieldTrialParamByFeatureAsInt(
@@ -205,6 +238,10 @@ public class ChromeHomeIphBubbleController {
 
                 ViewHighlighter.turnOffHighlight(anchorView);
 
+                if (showAtTopOfScreen) {
+                    topAnchorView.removeOnLayoutChangeListener(topAnchorLayoutChangeListener);
+                }
+
                 mHelpBubble = null;
             }
         });
@@ -215,9 +252,6 @@ public class ChromeHomeIphBubbleController {
         }
 
         // Show the bubble.
-        int inset = mContext.getResources().getDimensionPixelSize(
-                R.dimen.bottom_sheet_help_bubble_inset);
-        mHelpBubble.setInsetPx(0, inset, 0, inset);
         mHelpBubble.show();
     }
 
@@ -225,7 +259,24 @@ public class ChromeHomeIphBubbleController {
      * @return The bottom sheet's help bubble if it exists.
      */
     @VisibleForTesting
-    public @Nullable ViewAnchoredTextBubble getHelpBubbleForTests() {
+    public @Nullable TextBubble getHelpBubbleForTests() {
         return mHelpBubble;
     }
+
+    /** Dismiss the help bubble if it is not null. */
+    private void dismissHelpBubble() {
+        if (mHelpBubble != null) mHelpBubble.dismiss();
+    }
+
+    /**
+     * @param topAnchorView The view used display the IPH bubble when it is shown at the top of the
+     *                      screen.
+     * @return A {@link Rect} used to anchor the IPH bubble.
+     */
+    private Rect getTopAnchorRect(View topAnchorView) {
+        int[] locationInWindow = new int[2];
+        topAnchorView.getLocationInWindow(locationInWindow);
+        int centerPoint = locationInWindow[0] + topAnchorView.getWidth() / 2;
+        return new Rect(centerPoint, locationInWindow[1], centerPoint, locationInWindow[1]);
+    }
 }

chrome/android/java/src/org/chromium/chrome/browser/widget/textbubble/ArrowBubbleDrawable.java

@@ -37,6 +37,7 @@ class ArrowBubbleDrawable extends Drawable implements Drawable.Callback {
 
     private int mArrowXOffsetPx;
     private boolean mArrowOnTop;
+    private boolean mShowArrow;
 
     public ArrowBubbleDrawable(Context context) {
         mRadiusPx = context.getResources().getDimensionPixelSize(R.dimen.text_bubble_corner_radius);
@@ -102,6 +103,21 @@ class ArrowBubbleDrawable extends Drawable implements Drawable.Callback {
         return mArrowOnTop;
     }
 
+    /**
+     * @return Whether or not an arrow is currently shown.
+     */
+    public boolean isShowingArrow() {
+        return mShowArrow;
+    }
+
+    /**
+     * @param showArrow Whether the bubble should have an arrow.
+     */
+    public void setShowArrow(boolean showArrow) {
+        mShowArrow = showArrow;
+        invalidateSelf();
+    }
+
     /**
      * @param color The color to make the bubble and arrow.
      */
@@ -132,7 +148,9 @@ class ArrowBubbleDrawable extends Drawable implements Drawable.Callback {
     public void draw(Canvas canvas) {
         mBubbleDrawable.draw(canvas);
 
+        if (mShowArrow) {
             canvas.save();
+
             // If the arrow is on the bottom, flip the arrow before drawing.
             if (!mArrowOnTop) {
                 int arrowCenterYPx = getBounds().height() - mArrowHeightPx / 2;
@@ -143,6 +161,7 @@ class ArrowBubbleDrawable extends Drawable implements Drawable.Callback {
             canvas.drawPath(mArrowPath, mArrowPaint);
             canvas.restore();
         }
+    }
 
     @Override
     protected void onBoundsChange(Rect bounds) {

chrome/android/java/src/org/chromium/chrome/browser/widget/textbubble/TextBubble.java

@@ -129,7 +129,7 @@ public class TextBubble implements OnTouchListener {
     private final int mAccessibilityStringId;
 
     /**
-     * Constructs a {@link TextBubble} instance.
+     * Constructs a {@link TextBubble} instance using the default arrow drawable background.
      * @param context  Context to draw resources from.
      * @param rootView The {@link View} to use for size calculations and for display.
      * @param stringId The id of the string resource for the text that should be shown.
@@ -137,12 +137,28 @@ public class TextBubble implements OnTouchListener {
      */
     public TextBubble(Context context, View rootView, @StringRes int stringId,
             @StringRes int accessibilityStringId) {
+        this(context, rootView, stringId, accessibilityStringId, true);
+    }
+
+    /**
+     * Constructs a {@link TextBubble} instance.
+     * @param context  Context to draw resources from.
+     * @param rootView The {@link View} to use for size calculations and for display.
+     * @param stringId The id of the string resource for the text that should be shown.
+     * @param accessibilityStringId The id of the string resource of the accessibility text.
+     * @param showArrow Whether the bubble should have an arrow.
+     */
+    public TextBubble(Context context, View rootView, @StringRes int stringId,
+            @StringRes int accessibilityStringId, boolean showArrow) {
         mContext = context;
         mRootView = rootView.getRootView();
         mStringId = stringId;
         mAccessibilityStringId = accessibilityStringId;
         mPopupWindow = new PopupWindow(mContext);
+
         mDrawable = new ArrowBubbleDrawable(context);
+        mDrawable.setShowArrow(showArrow);
+
         mHandler = new Handler();
 
         mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
@@ -355,14 +371,19 @@ public class TextBubble implements OnTouchListener {
         // In landscape mode, root view includes the decorations in some devices. So we guard the
         // window dimensions against |mCachedWindowRect.right| instead.
         mX = MathUtils.clamp(mX, mMarginPx, mCachedWindowRect.right - mWidth - mMarginPx);
-        int arrowXOffset = mAnchorRect.centerX() - mX;
+
+        int arrowXOffset = 0;
+        if (mDrawable.isShowingArrow()) {
+            arrowXOffset = mAnchorRect.centerX() - mX;
 
             // Force the anchor to be in a reasonable spot w.r.t. the bubble (not over the corners).
             int minArrowOffset = mDrawable.getArrowLeftSpacing();
             int maxArrowOffset = mWidth - mDrawable.getArrowRightSpacing();
             arrowXOffset = MathUtils.clamp(arrowXOffset, minArrowOffset, maxArrowOffset);
+        }
 
-        // TODO(dtrainor): Figure out how to move the arrow and bubble to make things look better.
+        // TODO(dtrainor): Figure out how to move the arrow and bubble to make things look
+        // better.
 
         mDrawable.setPositionProperties(arrowXOffset, positionBelow);
 

chrome/browser/about_flags.cc

@@ -1907,6 +1907,10 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kChromeHomePersistentIphName,
      flag_descriptions::kChromeHomePersistentIphDescription, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kChromeHomePersistentIph)},
+    {"enable-chrome-home-pull-to-refresh-iph-at-top",
+     flag_descriptions::kChromeHomePullToRefreshIphAtTopName,
+     flag_descriptions::kChromeHomePullToRefreshIphAtTopDescription, kOsAndroid,
+     FEATURE_VALUE_TYPE(chrome::android::kChromeHomePullToRefreshIphAtTop)},
     {"enable-chrome-memex", flag_descriptions::kChromeMemexName,
      flag_descriptions::kChromeMemexDescription, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kChromeMemexFeature)},

chrome/browser/android/chrome_feature_list.cc

@@ -73,6 +73,7 @@ const base::Feature* kFeaturesExposedToJava[] = {
     &kChromeHomePromo,
     &kChromeHomePromoInfoOnly,
     &kChromeHomePromoOnStartup,
+    &kChromeHomePullToRefreshIphAtTop,
     &kChromeHomeOptOutSnackbar,
     &kChromeHomeShowGoogleGWhenUrlCleared,
     &kChromeHomeSurvey,
@@ -213,6 +214,9 @@ const base::Feature kChromeHomePromoInfoOnly{"ChromeHomePromoInfoOnly",
 const base::Feature kChromeHomePromoOnStartup{"ChromeHomePromoOnStartup",
                                               base::FEATURE_ENABLED_BY_DEFAULT};
 
+const base::Feature kChromeHomePullToRefreshIphAtTop{
+    "ChromeHomePullToRefreshIphAtTop", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kChromeHomeOptOutSnackbar{
     "ChromeHomeOptOutSnackbar", base::FEATURE_DISABLED_BY_DEFAULT};
 

chrome/browser/android/chrome_feature_list.h

@@ -32,6 +32,7 @@ extern const base::Feature kChromeHomePersistentIph;
 extern const base::Feature kChromeHomePromo;
 extern const base::Feature kChromeHomePromoInfoOnly;
 extern const base::Feature kChromeHomePromoOnStartup;
+extern const base::Feature kChromeHomePullToRefreshIphAtTop;
 extern const base::Feature kChromeHomeOptOutSnackbar;
 extern const base::Feature kChromeHomeShowGoogleGWhenUrlCleared;
 extern const base::Feature kChromeHomeSurvey;

chrome/browser/flag_descriptions.cc

@@ -1715,6 +1715,11 @@ const char kChromeHomePromoName[] = "Chrome Home Promo";
 const char kChromeHomePromoDescription[] =
     "Enable showing the opt-in/out Chrome Home promo.";
 
+const char kChromeHomePullToRefreshIphAtTopName[] =
+    "Chrome Home Pull-To-Refresh Iph At Top";
+const char kChromeHomePullToRefreshIphAtTopDescription[] =
+    "Show the Chrome Home pull-to-refresh help bubble at the top of the screen";
+
 const char kChromeHomeShowGoogleGName[] = "Chrome Home Show Google G";
 const char kChromeHomeShowGoogleGDescription[] =
     "Show the Google G when the url is cleared. The flag to clear the url "

chrome/browser/flag_descriptions.h

@@ -1052,6 +1052,9 @@ extern const char kChromeHomePersonalizedOmniboxSuggestionsDescription[];
 extern const char kChromeHomePromoName[];
 extern const char kChromeHomePromoDescription[];
 
+extern const char kChromeHomePullToRefreshIphAtTopName[];
+extern const char kChromeHomePullToRefreshIphAtTopDescription[];
+
 extern const char kChromeHomeShowGoogleGName[];
 extern const char kChromeHomeShowGoogleGDescription[];
 

tools/metrics/histograms/enums.xml

@@ -24710,6 +24710,7 @@ from previous Chrome versions.
   <int value="-1861814223" label="MidiManagerDynamicInstantiation:enabled"/>
   <int value="-1860481724" label="ChromeHomeExpandButton:enabled"/>
   <int value="-1856902397" label="LoadingWithMojo:enabled"/>
+  <int value="-1854432127" label="ChromeHomePullToRefreshIphAtTop:disabled"/>
   <int value="-1854372227" label="VrBrowsingExperimentalFeatures:enabled"/>
   <int value="-1849706663" label="enable-password-force-saving:disabled"/>
   <int value="-1847888049" label="AutofillSendBillingCustomerNumber:enabled"/>
@@ -24913,6 +24914,7 @@ from previous Chrome versions.
   <int value="-1322882747" label="disable-datasaver-prompt"/>
   <int value="-1319688939" label="ignore-gpu-blacklist"/>
   <int value="-1318914924" label="OverflowIconsForMediaControls:enabled"/>
+  <int value="-1314603238" label="ChromeHomePullToRefreshIphAtTop:enabled"/>
   <int value="-1310737697" label="MaterialDesignSettings:enabled"/>
   <int value="-1302904242" label="enable-navigation-tracing"/>
   <int value="-1294050129" label="ContentFullscreen:disabled"/>