base/android/java/src/org/chromium/base/jank_tracker/JankScenario.java

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package org.chromium.base.jank_tracker;

import androidx.annotation.IntDef;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * A list of jank scenarios to be tracked, each scenario corresponds to a specific user journey
 * except by PERIODIC_REPORTING, which runs constantly and is uploaded every 30s.
 *
 * <p>IMPORTANT: This must be kept up to date with the histograms.xml histograms
 * (Android.FrameTimelineJank..*) and the JankScenario C++ enum in
 * //base/android/jank_metric_uma_recorder.cc.
 */
@IntDef({
    JankScenario.PERIODIC_REPORTING,
    JankScenario.OMNIBOX_FOCUS,
    JankScenario.NEW_TAB_PAGE,
    JankScenario.STARTUP,
    JankScenario.TAB_SWITCHER,
    JankScenario.OPEN_LINK_IN_NEW_TAB,
    JankScenario.START_SURFACE_HOMEPAGE,
    JankScenario.START_SURFACE_TAB_SWITCHER,
    JankScenario.FEED_SCROLLING,
    JankScenario.WEBVIEW_SCROLLING
})
@Retention(RetentionPolicy.SOURCE)
public @interface JankScenario {
    int PERIODIC_REPORTING = 1;
    int OMNIBOX_FOCUS = 2;
    int NEW_TAB_PAGE = 3;
    int STARTUP = 4;
    int TAB_SWITCHER = 5;
    int OPEN_LINK_IN_NEW_TAB = 6;
    int START_SURFACE_HOMEPAGE = 7;
    int START_SURFACE_TAB_SWITCHER = 8;
    int FEED_SCROLLING = 9;
    int WEBVIEW_SCROLLING = 10;
}