Add support for LS Clock to use > 1 Paint object

Updated TextInterpolator and TextAnimator to support a
Paint object for each line of text. Now we can interpolate between
the colors when animating.

Clock colors are now based on the theme (for now, wallpaper text
color). ie: first line (of vertical clock) is one color, second line is
another color.

Also adjusted Keyguard clock logic to animate on doze changes instead of
animating incrementally on setDarkAmount.

Test: atest TextInterpolatorTest TextAnimatorTest
Bug: 170228350
Change-Id: Ia62f2de48534be2007afc5a95eac46b3c44ec880

1 files changed, 81 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/keyguard/AnimatableClockController.java b/packages/SystemUI/src/com/android/keyguard/AnimatableClockController.java
new file mode 100644
index 000000000000..692e40124da9
--- /dev/null
+++ b/packages/SystemUI/src/com/android/keyguard/AnimatableClockController.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2020 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.keyguard;
+
+import android.graphics.Color;
+
+import com.android.settingslib.Utils;
+import com.android.systemui.plugins.statusbar.StatusBarStateController;
+import com.android.systemui.util.ViewController;
+
+/**
+ * Controls the color of a GradientTextClock.
+ */
+public class AnimatableClockController extends ViewController<AnimatableClockView> {
+
+    private final StatusBarStateController mStatusBarStateController;
+    private final int[] mDozingColors = new int[] {Color.WHITE, Color.WHITE};
+    private int[] mLockScreenColors = new int[2];
+
+    private boolean mIsDozing;
+
+    public AnimatableClockController(
+            AnimatableClockView view,
+            StatusBarStateController statusBarStateController) {
+        super(view);
+        mStatusBarStateController = statusBarStateController;
+        mIsDozing = mStatusBarStateController.isDozing();
+    }
+
+    @Override
+    protected void onViewAttached() {
+        mStatusBarStateController.addCallback(mStatusBarStateListener);
+        mIsDozing = mStatusBarStateController.isDozing();
+        refreshTime();
+        initColors();
+    }
+
+    @Override
+    protected void onViewDetached() {
+        mStatusBarStateController.removeCallback(mStatusBarStateListener);
+    }
+
+    /**
+     * Updates the time for this view.
+     */
+    public void refreshTime() {
+        mView.refreshTime();
+    }
+
+    private void initColors() {
+        mLockScreenColors[0] = Utils.getColorAttrDefaultColor(getContext(),
+                com.android.systemui.R.attr.wallpaperTextColor);
+        mLockScreenColors[1] = Utils.getColorAttrDefaultColor(getContext(),
+                        com.android.systemui.R.attr.wallpaperTextColorSecondary);
+        mView.setColors(mDozingColors, mLockScreenColors);
+        mView.animateDoze(mIsDozing, false);
+    }
+
+    private final StatusBarStateController.StateListener mStatusBarStateListener =
+            new StatusBarStateController.StateListener() {
+                @Override
+                public void onDozingChanged(boolean isDozing) {
+                    mIsDozing = isDozing;
+                    mView.animateDoze(mIsDozing, true);
+                }
+            };
+}