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a79d460736
FlagDebugUtils.formatFlagChange() utility to always write the set of updated flags, with a list of actual changes applied. Examples: [allow_gesture|device_dozing] +[device_dozing] [] -[state_started] Additionally, moved the appendFlag utility to the new FlagDebugUtils Test: manually verifed the output in logcat Bug: 261418621 Change-Id: Ie4f2cfcd4b34f0a816db7845e1df4331babed07a
38 lines
1.2 KiB
Kotlin
38 lines
1.2 KiB
Kotlin
package com.android.launcher3.util
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import java.util.StringJoiner
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import java.util.function.IntFunction
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object FlagDebugUtils {
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/** Appends the [flagName] to [str] when the [flag] is set in [flags]. */
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@JvmStatic
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fun appendFlag(str: StringJoiner, flags: Int, flag: Int, flagName: String) {
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if (flags and flag != 0) {
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str.add(flagName)
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}
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}
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/**
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* Produces a human-readable representation of the [current] flags, followed by a diff from from
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* [previous].
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*
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* The resulting string is intented for logging and debugging.
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*/
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@JvmStatic
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fun formatFlagChange(current: Int, previous: Int, flagSerializer: IntFunction<String>): String {
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val result = StringJoiner(" ")
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result.add("[" + flagSerializer.apply(current) + "]")
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val changed = current xor previous
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val added = current and changed
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if (added != 0) {
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result.add("+[" + flagSerializer.apply(added) + "]")
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}
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val removed = previous and changed
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if (removed != 0) {
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result.add("-[" + flagSerializer.apply(removed) + "]")
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}
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return result.toString()
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}
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}
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