To add new marker to support long edge cutout

Currently, the cutout only exists in short edge of a display. It means
that the cutout only locates in short edge of the display in portrait
mode. The method to parse the cutout only supports top boundary or bottom
boundary cutout.

To modify the parser of cutout specification supports the long edge cutout
feature. CutoutSpecification handles the parsing rulers extracted from
DisplayCutout.

In order to make parsing faster, it doesn't use regular expression to parse
specification and String.split.

Test: atest \
    FrameworksCoreTests:android.view.DisplayCutoutTest \
    FrameworksCoreTests:android.view.CutoutSpecificationTest \
    SystemUITests:com.android.systemui.ScreenDecorationsTest \
    CorePerfTests:android.view.CutoutSpecificationBenchmark

Bug: 146875639
Change-Id: Ice3ad28ef29a6f11875c4946cf4a60ee792f1270

1 files changed, 240 insertions, 0 deletions

diff --git a/apct-tests/perftests/core/src/android/view/CutoutSpecificationBenchmark.java b/apct-tests/perftests/core/src/android/view/CutoutSpecificationBenchmark.java
new file mode 100644
index 000000000000..14282bfbd24e
--- /dev/null
+++ b/apct-tests/perftests/core/src/android/view/CutoutSpecificationBenchmark.java
@@ -0,0 +1,240 @@
+/*
+ * 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 android.view;
+
+import android.content.Context;
+import android.graphics.Matrix;
+import android.graphics.Path;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Region;
+import android.perftests.utils.BenchmarkState;
+import android.perftests.utils.PerfStatusReporter;
+import android.text.TextUtils;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.util.PathParser;
+
+import androidx.test.filters.LargeTest;
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@LargeTest
+public class CutoutSpecificationBenchmark {
+    private static final String TAG = "CutoutSpecificationBenchmark";
+
+    private static final String BOTTOM_MARKER = "@bottom";
+    private static final String DP_MARKER = "@dp";
+    private static final String RIGHT_MARKER = "@right";
+    private static final String LEFT_MARKER = "@left";
+
+    private static final String DOUBLE_CUTOUT_SPEC = "M 0,0\n"
+            + "L -72, 0\n"
+            + "L -69.9940446283, 20.0595537175\n"
+            + "C -69.1582133885, 28.4178661152 -65.2, 32.0 -56.8, 32.0\n"
+            + "L 56.8, 32.0\n"
+            + "C 65.2, 32.0 69.1582133885, 28.4178661152 69.9940446283, 20.0595537175\n"
+            + "L 72, 0\n"
+            + "Z\n"
+            + "@bottom\n"
+            + "M 0,0\n"
+            + "L -72, 0\n"
+            + "L -69.9940446283, -20.0595537175\n"
+            + "C -69.1582133885, -28.4178661152 -65.2, -32.0 -56.8, -32.0\n"
+            + "L 56.8, -32.0\n"
+            + "C 65.2, -32.0 69.1582133885, -28.4178661152 69.9940446283, -20.0595537175\n"
+            + "L 72, 0\n"
+            + "Z\n"
+            + "@dp";
+    @Rule
+    public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
+
+    private Context mContext;
+    private DisplayMetrics mDisplayMetrics;
+
+    /**
+     * Setup the necessary member field used by test methods.
+     */
+    @Before
+    public void setUp() {
+        mContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+
+        mDisplayMetrics = new DisplayMetrics();
+        mContext.getDisplay().getRealMetrics(mDisplayMetrics);
+    }
+
+
+    private static void toRectAndAddToRegion(Path p, Region inoutRegion, Rect inoutRect) {
+        final RectF rectF = new RectF();
+        p.computeBounds(rectF, false /* unused */);
+        rectF.round(inoutRect);
+        inoutRegion.op(inoutRect, Region.Op.UNION);
+    }
+
+    private static void oldMethodParsingSpec(String spec, int displayWidth, int displayHeight,
+            float density) {
+        Path p = null;
+        Rect boundTop = null;
+        Rect boundBottom = null;
+        Rect safeInset = new Rect();
+        String bottomSpec = null;
+        if (!TextUtils.isEmpty(spec)) {
+            spec = spec.trim();
+            final float offsetX;
+            if (spec.endsWith(RIGHT_MARKER)) {
+                offsetX = displayWidth;
+                spec = spec.substring(0, spec.length() - RIGHT_MARKER.length()).trim();
+            } else if (spec.endsWith(LEFT_MARKER)) {
+                offsetX = 0;
+                spec = spec.substring(0, spec.length() - LEFT_MARKER.length()).trim();
+            } else {
+                offsetX = displayWidth / 2f;
+            }
+            final boolean inDp = spec.endsWith(DP_MARKER);
+            if (inDp) {
+                spec = spec.substring(0, spec.length() - DP_MARKER.length());
+            }
+
+            if (spec.contains(BOTTOM_MARKER)) {
+                String[] splits = spec.split(BOTTOM_MARKER, 2);
+                spec = splits[0].trim();
+                bottomSpec = splits[1].trim();
+            }
+
+            final Matrix m = new Matrix();
+            final Region r = Region.obtain();
+            if (!spec.isEmpty()) {
+                try {
+                    p = PathParser.createPathFromPathData(spec);
+                } catch (Throwable e) {
+                    Log.wtf(TAG, "Could not inflate cutout: ", e);
+                }
+
+                if (p != null) {
+                    if (inDp) {
+                        m.postScale(density, density);
+                    }
+                    m.postTranslate(offsetX, 0);
+                    p.transform(m);
+
+                    boundTop = new Rect();
+                    toRectAndAddToRegion(p, r, boundTop);
+                    safeInset.top = boundTop.bottom;
+                }
+            }
+
+            if (bottomSpec != null) {
+                int bottomInset = 0;
+                Path bottomPath = null;
+                try {
+                    bottomPath = PathParser.createPathFromPathData(bottomSpec);
+                } catch (Throwable e) {
+                    Log.wtf(TAG, "Could not inflate bottom cutout: ", e);
+                }
+
+                if (bottomPath != null) {
+                    // Keep top transform
+                    m.postTranslate(0, displayHeight);
+                    bottomPath.transform(m);
+                    p.addPath(bottomPath);
+                    boundBottom = new Rect();
+                    toRectAndAddToRegion(bottomPath, r, boundBottom);
+                    bottomInset = displayHeight - boundBottom.top;
+                }
+                safeInset.bottom = bottomInset;
+            }
+        }
+    }
+
+    @Test
+    public void parseByOldMethodForDoubleCutout() {
+        final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
+        while (state.keepRunning()) {
+            oldMethodParsingSpec(DOUBLE_CUTOUT_SPEC, mDisplayMetrics.widthPixels,
+                    mDisplayMetrics.heightPixels, mDisplayMetrics.density);
+        }
+    }
+
+    @Test
+    public void parseByNewMethodForDoubleCutout() {
+        final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
+        while (state.keepRunning()) {
+            new CutoutSpecification.Parser(mDisplayMetrics.density,
+                    mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels)
+                    .parse(DOUBLE_CUTOUT_SPEC);
+        }
+    }
+
+    @Test
+    public void parseLongEdgeCutout() {
+        final String spec = "M 0,0\n"
+                + "H 48\n"
+                + "V 48\n"
+                + "H -48\n"
+                + "Z\n"
+                + "@left\n"
+                + "@center_vertical\n"
+                + "M 0,0\n"
+                + "H 48\n"
+                + "V 48\n"
+                + "H -48\n"
+                + "Z\n"
+                + "@left\n"
+                + "@center_vertical\n"
+                + "M 0,0\n"
+                + "H -48\n"
+                + "V 48\n"
+                + "H 48\n"
+                + "Z\n"
+                + "@right\n"
+                + "@dp";
+
+        final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
+        while (state.keepRunning()) {
+            new CutoutSpecification.Parser(mDisplayMetrics.density,
+                    mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels).parse(spec);
+        }
+    }
+
+    @Test
+    public void parseShortEdgeCutout() {
+        final String spec = "M 0,0\n"
+                + "H 48\n"
+                + "V 48\n"
+                + "H -48\n"
+                + "Z\n"
+                + "@bottom\n"
+                + "M 0,0\n"
+                + "H 48\n"
+                + "V -48\n"
+                + "H -48\n"
+                + "Z\n"
+                + "@dp";
+
+        final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
+        while (state.keepRunning()) {
+            new CutoutSpecification.Parser(mDisplayMetrics.density,
+                    mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels).parse(spec);
+        }
+    }
+}