Implementing detector of view position jumps (9e1fbcbe) · Commits · e / os / android_packages_apps_Trebuchet

tests/src/com/android/launcher3/util/viewcapture_analysis/AlphaJumpDetector.java

+2 −1

Original line number	Diff line number	Diff line
		@@ -179,7 +179,8 @@ final class AlphaJumpDetector extends AnomalyDetector {
		}

		@Override
		String detectAnomalies(AnalysisNode oldInfo, AnalysisNode newInfo, int frameN, long timestamp) {
		String detectAnomalies(AnalysisNode oldInfo, AnalysisNode newInfo, int frameN, long timestamp,
		int windowSizePx) {
		// If the view was previously seen, proceed with analysis only if it was present in the
		// view hierarchy in the previous frame.
		if (oldInfo != null && oldInfo.frameN != frameN) return null;

tests/src/com/android/launcher3/util/viewcapture_analysis/AnomalyDetector.java

+9 −8

Original line number	Diff line number	Diff line
		@@ -72,13 +72,14 @@ abstract class AnomalyDetector {
		* hierarchy before 'currentFrame'. 'null' means that the view is first seen
		* in the 'currentFrame'.
		* @param newInfo the view in the view hierarchy of the 'currentFrame'. 'null' means that
		* the view is not present in the 'currentFrame', but was present in the previous
		* frame.
		* the view is not present in the 'currentFrame', but was present in the
		* previous frame.
		* @param frameN number of the current frame.
		* @param windowSizePx maximum of the window width and height, in pixels.
		* @return Anomaly diagnostic message if an anomaly has been detected; null otherwise.
		*/
		abstract String detectAnomalies(
		@Nullable ViewCaptureAnalyzer.AnalysisNode oldInfo,
		@Nullable ViewCaptureAnalyzer.AnalysisNode newInfo, int frameN,
		long frameTimeNs);
		long frameTimeNs, int windowSizePx);
		}

tests/src/com/android/launcher3/util/viewcapture_analysis/FlashDetector.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -106,7 +106,7 @@ final class FlashDetector extends AnomalyDetector {

		@Override
		String detectAnomalies(AnalysisNode oldInfo, AnalysisNode newInfo, int frameN,
		long frameTimeNs) {
		long frameTimeNs, int windowSizePx) {
		// Should we check when a view was visible for a short period, then its alpha became 0?
		// Then 'lastVisible' time should be the last one still visible?
		// Check only transitions of alpha between 0 and 1?

tests/src/com/android/launcher3/util/viewcapture_analysis/PositionJumpDetector.java

0 → 100644

+126 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2023 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.launcher3.util.viewcapture_analysis;

		import com.android.launcher3.util.viewcapture_analysis.ViewCaptureAnalyzer.AnalysisNode;

		import java.util.List;

		/**
		* Anomaly detector that triggers an error when a view position jumps.
		*/
		final class PositionJumpDetector extends AnomalyDetector {
		// Maximum allowed jump in "milliwindows", i.e. a 1/1000's of the maximum of the window
		// dimensions.
		private static final float JUMP_MIW = 250;

		private static final String[] BORDER_NAMES = {"left", "top", "right", "bottom"};

		// Commonly used parts of the paths to ignore.
		private static final String CONTENT = "DecorView\|LinearLayout\|FrameLayout:id/content\|";
		private static final String DRAG_LAYER =
		CONTENT + "LauncherRootView:id/launcher\|DragLayer:id/drag_layer\|";
		private static final String RECENTS_DRAG_LAYER =
		CONTENT + "LauncherRootView:id/launcher\|RecentsDragLayer:id/drag_layer\|";

		private static final IgnoreNode IGNORED_NODES_ROOT = buildIgnoreNodesTree(List.of(
		DRAG_LAYER + "SearchContainerView:id/apps_view",
		DRAG_LAYER + "AppWidgetResizeFrame",
		DRAG_LAYER + "LauncherAllAppsContainerView:id/apps_view",
		CONTENT
		+ "AddItemDragLayer:id/add_item_drag_layer\|AddItemWidgetsBottomSheet:id"
		+ "/add_item_bottom_sheet\|LinearLayout:id/add_item_bottom_sheet_content",
		DRAG_LAYER + "WidgetsTwoPaneSheet\|SpringRelativeLayout:id/container",
		DRAG_LAYER + "WidgetsFullSheet\|SpringRelativeLayout:id/container",
		DRAG_LAYER + "LauncherDragView",
		RECENTS_DRAG_LAYER + "FallbackRecentsView:id/overview_panel\|TaskView",
		CONTENT + "LauncherRootView:id/launcher\|FloatingIconView",
		DRAG_LAYER + "FloatingTaskView",
		DRAG_LAYER + "LauncherRecentsView:id/overview_panel"
		));

		// Per-AnalysisNode data that's specific to this detector.
		private static class NodeData {
		public boolean ignoreJumps;

		// If ignoreNode is null, then this AnalysisNode node will be ignored if its parent is
		// ignored.
		// Otherwise, this AnalysisNode will be ignored if ignoreNode is a leaf i.e. has no
		// children.
		public IgnoreNode ignoreNode;
		}

		private NodeData getNodeData(AnalysisNode info) {
		return (NodeData) info.detectorsData[detectorOrdinal];
		}

		@Override
		void initializeNode(AnalysisNode info) {
		final NodeData nodeData = new NodeData();
		info.detectorsData[detectorOrdinal] = nodeData;

		// If the parent view ignores jumps, its descendants will too.
		final boolean parentIgnoresJumps = info.parent != null && getNodeData(
		info.parent).ignoreJumps;
		if (parentIgnoresJumps) {
		nodeData.ignoreJumps = true;
		return;
		}

		// Parent view doesn't ignore jumps.
		// Initialize this AnalysisNode's ignore-node with the corresponding child of the
		// ignore-node of the parent, if present.
		final IgnoreNode parentIgnoreNode = info.parent != null
		? getNodeData(info.parent).ignoreNode
		: IGNORED_NODES_ROOT;
		nodeData.ignoreNode = parentIgnoreNode != null
		? parentIgnoreNode.children.get(info.nodeIdentity) : null;
		// AnalysisNode will be ignored if the corresponding ignore-node is a leaf.
		nodeData.ignoreJumps =
		nodeData.ignoreNode != null && nodeData.ignoreNode.children.isEmpty();
		}

		@Override
		String detectAnomalies(AnalysisNode oldInfo, AnalysisNode newInfo, int frameN,
		long frameTimeNs, int windowSizePx) {
		// If the view is not present in the current frame, there can't be a jump detected in the
		// current frame.
		if (newInfo == null) return null;

		// We only detect position jumps if the view was visible in the previous frame.
		if (oldInfo == null \|\| frameN != oldInfo.frameN + 1) return null;

		final NodeData newNodeData = getNodeData(newInfo);
		if (newNodeData.ignoreJumps) return null;

		final float[] positionDiffs = {
		newInfo.left - oldInfo.left,
		newInfo.top - oldInfo.top,
		newInfo.right - oldInfo.right,
		newInfo.bottom - oldInfo.bottom
		};

		for (int i = 0; i < 4; ++i) {
		final float positionDiffAbs = Math.abs(positionDiffs[i]);
		if (positionDiffAbs * 1000 > JUMP_MIW * windowSizePx) {
		newNodeData.ignoreJumps = true;
		return String.format("Position jump: %s jumped by %s",
		BORDER_NAMES[i], positionDiffAbs);
		}
		}
		return null;
		}
		}

tests/src/com/android/launcher3/util/viewcapture_analysis/ViewCaptureAnalyzer.java

+47 −16

Original line number	Diff line number	Diff line
		@@ -36,7 +36,8 @@ public class ViewCaptureAnalyzer {
		// All detectors. They will be invoked in the order listed here.
		private static final AnomalyDetector[] ANOMALY_DETECTORS = {
		new AlphaJumpDetector(),
		new FlashDetector()
		new FlashDetector(),
		new PositionJumpDetector()
		};

		static {
		@@ -52,6 +53,8 @@ public class ViewCaptureAnalyzer {
		// Window coordinates of the view.
		public float left;
		public float top;
		public float right;
		public float bottom;

		// Visible scale and alpha, build recursively from the ancestor list.
		public float scaleX;
		@@ -81,7 +84,8 @@ public class ViewCaptureAnalyzer {

		@Override
		public String toString() {
		return String.format("view window coordinates: (%s, %s)", left, top);
		return String.format("view window coordinates: (%s, %s, %s, %s)",
		left, top, right, bottom);
		}
		}

		@@ -112,15 +116,33 @@ public class ViewCaptureAnalyzer {
		// As we go though frames, if a view becomes invisible, it stays in the map.
		final Map<Integer, AnalysisNode> lastSeenNodes = new HashMap<>();

		int windowWidthPx = -1;
		int windowHeightPx = -1;

		for (int frameN = 0; frameN < windowData.getFrameDataCount(); ++frameN) {
		analyzeFrame(frameN, windowData.getFrameData(frameN), viewCaptureData, lastSeenNodes,
		scrimClassIndex, anomalies);
		final FrameData frame = windowData.getFrameData(frameN);
		final ViewNode rootNode = frame.getNode();

		// If the rotation or window size has changed, reset the analyzer state.
		final boolean isFirstFrame = windowWidthPx != rootNode.getWidth()
		\|\| windowHeightPx != rootNode.getHeight();
		if (isFirstFrame) {
		windowWidthPx = rootNode.getWidth();
		windowHeightPx = rootNode.getHeight();
		lastSeenNodes.clear();
		}

		final int windowSizePx = Math.max(rootNode.getWidth(), rootNode.getHeight());

		analyzeFrame(frameN, isFirstFrame, frame, viewCaptureData, lastSeenNodes,
		scrimClassIndex, anomalies, windowSizePx);
		}
		}

		private static void analyzeFrame(int frameN, FrameData frame, ExportedData viewCaptureData,
		private static void analyzeFrame(int frameN, boolean isFirstFrame, FrameData frame,
		ExportedData viewCaptureData,
		Map<Integer, AnalysisNode> lastSeenNodes, int scrimClassIndex,
		Map<String, String> anomalies) {
		Map<String, String> anomalies, int windowSizePx) {
		// Analyze the node tree starting from the root.
		long frameTimeNs = frame.getTimestamp();
		analyzeView(
		@@ -128,12 +150,14 @@ public class ViewCaptureAnalyzer {
		frame.getNode(),
		/* parent = */ null,
		frameN,
		isFirstFrame,
		/* leftShift = */ 0,
		/* topShift = */ 0,
		viewCaptureData,
		lastSeenNodes,
		scrimClassIndex,
		anomalies);
		anomalies,
		windowSizePx);

		// Analyze transitions when a view visible in the previous frame became invisible in the
		// current one.
		@@ -148,7 +172,8 @@ public class ViewCaptureAnalyzer {
		/* oldInfo = */ info,
		/* newInfo = */ null,
		anomalies,
		frameTimeNs)
		frameTimeNs,
		windowSizePx)
		);
		}
		info.timeBecameInvisibleNs = info.alpha == 1 ? frameTimeNs : -1;
		@@ -159,9 +184,9 @@ public class ViewCaptureAnalyzer {

		private static void analyzeView(long frameTimeNs, ViewNode viewCaptureNode, AnalysisNode parent,
		int frameN,
		float leftShift, float topShift, ExportedData viewCaptureData,
		boolean isFirstFrame, float leftShift, float topShift, ExportedData viewCaptureData,
		Map<Integer, AnalysisNode> lastSeenNodes, int scrimClassIndex,
		Map<String, String> anomalies) {
		Map<String, String> anomalies, int windowSizePx) {
		// Skip analysis of invisible views
		final float parentAlpha = parent != null ? parent.alpha : 1;
		final float alpha = getVisibleAlpha(viewCaptureNode, parentAlpha);
		@@ -182,6 +207,8 @@ public class ViewCaptureAnalyzer {
		final float top = topShift
		+ (viewCaptureNode.getTop() + viewCaptureNode.getTranslationY()) * parentScaleY
		+ viewCaptureNode.getHeight() * (parentScaleY - scaleY) / 2;
		final float width = viewCaptureNode.getWidth() * scaleX;
		final float height = viewCaptureNode.getHeight() * scaleY;

		// Initialize new analysis node
		final AnalysisNode newAnalysisNode = new AnalysisNode();
		@@ -192,6 +219,8 @@ public class ViewCaptureAnalyzer {
		newAnalysisNode.parent = parent;
		newAnalysisNode.left = left;
		newAnalysisNode.top = top;
		newAnalysisNode.right = left + width;
		newAnalysisNode.bottom = top + height;
		newAnalysisNode.scaleX = scaleX;
		newAnalysisNode.scaleY = scaleY;
		newAnalysisNode.alpha = alpha;
		@@ -216,11 +245,11 @@ public class ViewCaptureAnalyzer {
		}

		// Detect anomalies for the view.
		if (frameN != 0 && !viewCaptureNode.getWillNotDraw()) {
		if (!isFirstFrame && !viewCaptureNode.getWillNotDraw()) {
		Arrays.stream(ANOMALY_DETECTORS).forEach(
		detector ->
		detectAnomaly(detector, frameN, oldAnalysisNode, newAnalysisNode,
		anomalies, frameTimeNs)
		anomalies, frameTimeNs, windowSizePx)
		);
		}
		lastSeenNodes.put(hashcode, newAnalysisNode);
		@@ -235,17 +264,19 @@ public class ViewCaptureAnalyzer {
		// transparent.
		if (child.getClassnameIndex() == scrimClassIndex) break;

		analyzeView(frameTimeNs, child, newAnalysisNode, frameN, leftShiftForChildren,
		analyzeView(frameTimeNs, child, newAnalysisNode, frameN, isFirstFrame,
		leftShiftForChildren,
		topShiftForChildren,
		viewCaptureData, lastSeenNodes, scrimClassIndex, anomalies);
		viewCaptureData, lastSeenNodes, scrimClassIndex, anomalies, windowSizePx);
		}
		}

		private static void detectAnomaly(AnomalyDetector detector, int frameN,
		AnalysisNode oldAnalysisNode, AnalysisNode newAnalysisNode,
		Map<String, String> anomalies, long frameTimeNs) {
		Map<String, String> anomalies, long frameTimeNs, int windowSizePx) {
		final String maybeAnomaly =
		detector.detectAnomalies(oldAnalysisNode, newAnalysisNode, frameN, frameTimeNs);
		detector.detectAnomalies(oldAnalysisNode, newAnalysisNode, frameN, frameTimeNs,
		windowSizePx);
		if (maybeAnomaly != null) {
		AnalysisNode latestInfo = newAnalysisNode != null ? newAnalysisNode : oldAnalysisNode;
		final String viewDiagPath = diagPathFromRoot(latestInfo);