Support setting mouse cursor icon in Android N.

chrome/android/java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java

 // Copyright 2015 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.snackbar;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.app.Activity;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.GradientDrawable;
+import android.os.Build;
 import android.support.annotation.Nullable;
 import android.view.Gravity;
 import android.view.LayoutInflater;
+import android.view.PointerIcon;
 import android.view.SurfaceView;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLayoutChangeListener;
 import android.view.ViewGroup;
 import android.view.animation.DecelerateInterpolator;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.TextView;
 
@@ skipping 58 matching lines @@
         mParent = mOriginalParent;
         mView = (ViewGroup) LayoutInflater.from(activity).inflate(
                 R.layout.snackbar, mParent, false);
         mAnimationDuration = mView.getResources()
                 .getInteger(android.R.integer.config_mediumAnimTime);
         mMessageView = (TemplatePreservingTextView) mView.findViewById(R.id.snackbar_message);
         mActionButtonView = (TextView) mView.findViewById(R.id.snackbar_button);
         mActionButtonView.setOnClickListener(listener);
         mProfileImageView = (ImageView) mView.findViewById(R.id.snackbar_profile_image);
 
+        setPointerIcons();
+
         updateInternal(snackbar, false);
     }
 
     void show() {
         addToParent();
         mView.addOnLayoutChangeListener(new OnLayoutChangeListener() {
             @Override
             public void onLayoutChange(View v, int left, int top, int right, int bottom,
                     int oldLeft, int oldTop, int oldRight, int oldBottom) {
                 mView.removeOnLayoutChangeListener(this);
@@ skipping 29 matching lines @@
     }
 
     /**
      * Adjusts the position of the snackbar on top of the soft keyboard, if any.
      */
     void adjustViewPosition() {
         mParent.getWindowVisibleDisplayFrame(mCurrentVisibleRect);
         // Only update if the visible frame has changed, otherwise there will be a layout loop.
         if (!mCurrentVisibleRect.equals(mPreviousVisibleRect)) {
             mPreviousVisibleRect.set(mCurrentVisibleRect);
-
-            int keyboardHeight = mParent.getHeight() - mCurrentVisibleRect.bottom

[Jinsuk Kim, 2017/07/17 04:45:19]

Why is it okay not to take the keyboard height into account any more?

[jaebaek, 2017/07/18 07:48:21]

Initially, layout_height of mParent was "match_parent".
In that setting, if we do not give bottomMargin when
keyboard or android home button is shown, it overlaps
with mView (i.e., snackbar) and mView is partially not
shown.

Since I changed layout_height of mParent as
"wrap_content", by default, mParent is placed on the top
of keyboard or android home button without overlaps.
Moreover, this margin calculation becomes a huge minus
number because mParent.getHeight() is small and mView
disappears. Thus, this bottomMargin must be removed.

-                    + mCurrentVisibleRect.top;
-            FrameLayout.LayoutParams lp = getLayoutParams();
-            lp.bottomMargin = keyboardHeight;
             if (mIsTablet) {
+                FrameLayout.LayoutParams lp = getLayoutParams();
                 int margin = mParent.getResources()
                         .getDimensionPixelSize(R.dimen.snackbar_margin_tablet);
                 int width = mParent.getResources()
                         .getDimensionPixelSize(R.dimen.snackbar_width_tablet);
                 lp.width = Math.min(width, mParent.getWidth() - 2 * margin);
                 lp.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
+                mView.setLayoutParams(lp);
             }
-            mView.setLayoutParams(lp);
         }
     }
 
     /**
      * @see SnackbarManager#overrideParent(ViewGroup)
      */
     void overrideParent(ViewGroup overridingParent) {
         mParent.removeOnLayoutChangeListener(mLayoutListener);
         mParent = overridingParent == null ? mOriginalParent : overridingParent;
         if (isShowing()) {
@@ skipping 110 matching lines @@
         if (view.getText().toString().equals(text)) return;
         view.animate().cancel();
         if (animate) {
             view.setAlpha(0.0f);
             view.setText(text);
             view.animate().alpha(1.f).setDuration(mAnimationDuration).setListener(null);
         } else {
             view.setText(text);
         }
     }
+
+    private void setPointerIcons() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            setPointerIcon(mMessageView, PointerIcon.TYPE_TEXT);
+            setPointerIcon(mActionButtonView, PointerIcon.TYPE_HAND);
+        }
+    }
+
+    private void setPointerIcon(View view, int type) {

[Jinsuk Kim, 2017/07/17 04:45:19]

static?

[jaebaek, 2017/07/18 07:48:21]

Done.

+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            PointerIcon icon = PointerIcon.getSystemIcon(view.getContext(), type);
+            view.setPointerIcon(icon);
+        }
+    }
 }