Repository: zach-klippenstein/compose-undo
Branch: main
Commit: 274fe613693b
Files: 40
Total size: 79.6 KB
Directory structure:
gitextract_r4b_iw8e/
├── .gitignore
├── LICENSE
├── README.md
├── build.gradle
├── demo/
│ ├── .gitignore
│ ├── build.gradle
│ ├── proguard-rules.pro
│ └── src/
│ ├── androidTest/
│ │ └── java/
│ │ └── com/
│ │ └── zachklipp/
│ │ └── statehistory/
│ │ └── demo/
│ │ └── DemoTest.kt
│ └── main/
│ ├── AndroidManifest.xml
│ ├── java/
│ │ └── com/
│ │ └── zachklipp/
│ │ └── statehistory/
│ │ └── demo/
│ │ ├── App.kt
│ │ ├── AppWithInspector.kt
│ │ ├── MainActivity.kt
│ │ ├── StateHistoryInspector.kt
│ │ └── ui/
│ │ └── theme/
│ │ ├── Color.kt
│ │ ├── Shape.kt
│ │ ├── Theme.kt
│ │ └── Type.kt
│ └── res/
│ ├── drawable/
│ │ └── ic_launcher_background.xml
│ ├── drawable-v24/
│ │ └── ic_launcher_foreground.xml
│ ├── mipmap-anydpi-v26/
│ │ ├── ic_launcher.xml
│ │ └── ic_launcher_round.xml
│ ├── values/
│ │ ├── colors.xml
│ │ ├── strings.xml
│ │ └── themes.xml
│ └── xml/
│ ├── backup_rules.xml
│ └── data_extraction_rules.xml
├── gradle/
│ └── wrapper/
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradle.properties
├── gradlew
├── gradlew.bat
├── settings.gradle
└── statehistory/
├── .gitignore
├── build.gradle
├── gradle.properties
├── proguard-rules.pro
└── src/
├── androidTest/
│ └── java/
│ └── com/
│ └── zachklipp/
│ └── statehistory/
│ └── demo/
│ └── StateHistoryTest.kt
├── main/
│ ├── AndroidManifest.xml
│ └── java/
│ └── com/
│ └── zachklipp/
│ └── statehistory/
│ └── StateHistory.kt
└── test/
└── java/
└── com/
└── zachklipp/
└── statehistory/
└── demo/
└── StateHistoryTest.kt
================================================
FILE CONTENTS
================================================
================================================
FILE: .gitignore
================================================
# Built application files
*.apk
*.aar
*.ap_
*.aab
# Files for the ART/Dalvik VM
*.dex
# Java class files
*.class
# Generated files
bin/
gen/
out/
# Uncomment the following line in case you need and you don't have the release build type files in your app
# release/
# Gradle files
.gradle/
build/
# Local configuration file (sdk path, etc)
local.properties
# Proguard folder generated by Eclipse
proguard/
# Log Files
*.log
# Android Studio Navigation editor temp files
.navigation/
# Android Studio captures folder
captures/
# IntelliJ
*.iml
.idea/workspace.xml
.idea/tasks.xml
.idea/gradle.xml
.idea/assetWizardSettings.xml
.idea/dictionaries
.idea/libraries
# Android Studio 3 in .gitignore file.
.idea/caches
.idea/modules.xml
# Comment next line if keeping position of elements in Navigation Editor is relevant for you
.idea/navEditor.xml
# Keystore files
# Uncomment the following lines if you do not want to check your keystore files in.
#*.jks
#*.keystore
# External native build folder generated in Android Studio 2.2 and later
.externalNativeBuild
.cxx/
# Google Services (e.g. APIs or Firebase)
# google-services.json
# Freeline
freeline.py
freeline/
freeline_project_description.json
# fastlane
fastlane/report.xml
fastlane/Preview.html
fastlane/screenshots
fastlane/test_output
fastlane/readme.md
# Version control
vcs.xml
# lint
lint/intermediates/
lint/generated/
lint/outputs/
lint/tmp/
# lint/reports/
# From android studio
*.iml
.gradle
/local.properties
/.idea/caches
/.idea/libraries
/.idea/modules.xml
/.idea/workspace.xml
/.idea/navEditor.xml
/.idea/assetWizardSettings.xml
.DS_Store
/build
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.cxx
local.properties
.idea/*
================================================
FILE: LICENSE
================================================
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================================================
FILE: README.md
================================================
# compose-undo 
Track changes to any snapshot state object and restore state from any point in the past.
## Usage
```groovy
implementation 'com.zachklipp.compose-undo:statehistory:{version}'
```
The simplest way to get started is to use the `WithStateHistory` composable:
```kotlin
@Composable
fun App() {
WithStateHistory { history ->
var text by remember { mutableStateOf(TextFieldValue("")) }.trackStateChanges()
TextField(text, onValueChange = { text = it })
Button(onClick { history.undo() }) {
Text("Undo")
}
}
}
```
The key is to call `trackStateChanges` on every snapshot state object you want to track. If you're
creating state objects outside a composition, call `StateHistory.startTrackingState` yourself.
## Advanced usage
The main API is the `StateHistory` class. See
[its kdoc](/statehistory/src/main/java/com/zachklipp/statehistory/StateHistory.kt) for more detailed
information.
## Demo
This repo includes a demo app you can run and tinker with if you fork the repo. Here's a little
preview:
https://user-images.githubusercontent.com/101754/190877868-160456a2-5bd1-498d-9c76-147fb04958e6.mp4
## How it works
`StateHistory` keeps a set of all the state objects that were registered on it. It registers an
apply listener to the snapshot system, and any time a snapshot is applied to the global snapshot it
checks if any of the objects changed by that snapshot are being tracked. For every tracked changed
object, it makes a copy of its latest state record. It collects all changes to tracked objects in a
map (called a "frame"), then when `saveFrame` is called, it pushes that map onto the list of frames
that represents the history.
When asked to restore states to a particular frame, it goes through every tracked state object and
searches the frame list from the requested frame to find the latest frame that captured a change to
that object. It then asks the snapshot system for a writable record for that object and copies the
saved record back into the writable record, effectively setting the state object's value.
This is a very unconventional and probably unsupported use case of the
[`StateObject`](https://developer.android.com/reference/kotlin/androidx/compose/runtime/snapshots/StateObject)
and
[`StateRecord`](https://developer.android.com/reference/kotlin/androidx/compose/runtime/snapshots/StateRecord)
APIs, but it allows the library to support any type of state object, even custom third-party ones.
The actual implementation for saving and restoring state values looks something like this
(`stateObject` is a `StateObject`):
```kotlin
// Save a state object's current value
val savedRecord = stateObject.firstStateRecord.create()
stateObject.firstStateRecord.withCurrent { currentRecord ->
savedRecord.assign(currentRecord)
}
// Restore the value
stateObject.firstStateRecord.writable(stateObject) {
assign(savedRecord)
}
```
================================================
FILE: build.gradle
================================================
buildscript {
ext {
compose_ui_version = '1.3.0-beta02'
}
}// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
id 'com.android.application' version '7.4.0-alpha10' apply false
id 'com.android.library' version '7.4.0-alpha10' apply false
id 'org.jetbrains.kotlin.android' version '1.7.10' apply false
id 'com.vanniktech.maven.publish' version '0.22.0' apply false
}
================================================
FILE: demo/.gitignore
================================================
/build
================================================
FILE: demo/build.gradle
================================================
plugins {
id 'com.android.application'
id 'org.jetbrains.kotlin.android'
}
android {
namespace 'com.zachklipp.statehistory.demo'
compileSdk 33
defaultConfig {
applicationId "com.zachklipp.statehistory.demo"
minSdk 21
targetSdk 33
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
vectorDrawables {
useSupportLibrary true
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
buildFeatures {
compose true
}
composeOptions {
kotlinCompilerExtensionVersion '1.3.1'
}
packagingOptions {
resources {
excludes += '/META-INF/{AL2.0,LGPL2.1}'
}
}
}
dependencies {
implementation project(':statehistory')
implementation 'androidx.core:core-ktx:1.9.0'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.5.1'
implementation 'androidx.lifecycle:lifecycle-viewmodel-compose:2.5.1'
implementation 'androidx.activity:activity-compose:1.5.1'
implementation "androidx.compose.ui:ui:$compose_ui_version"
implementation "androidx.compose.ui:ui-tooling-preview:$compose_ui_version"
implementation 'androidx.compose.material:material:1.2.1'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_ui_version"
androidTestImplementation 'com.google.truth:truth:1.1.3'
debugImplementation "androidx.compose.ui:ui-tooling:$compose_ui_version"
debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_ui_version"
}
================================================
FILE: demo/proguard-rules.pro
================================================
# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
# http://developer.android.com/guide/developing/tools/proguard.html
# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
# public *;
#}
# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable
# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile
================================================
FILE: demo/src/androidTest/java/com/zachklipp/statehistory/demo/DemoTest.kt
================================================
package com.zachklipp.statehistory.demo
import androidx.compose.ui.semantics.SemanticsActions
import androidx.compose.ui.semantics.SemanticsProperties
import androidx.compose.ui.semantics.progressBarRangeInfo
import androidx.compose.ui.test.*
import androidx.compose.ui.test.junit4.createComposeRule
import androidx.test.ext.junit.runners.AndroidJUnit4
import com.google.common.truth.Truth.assertThat
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith
@RunWith(AndroidJUnit4::class)
class DemoTest {
@get:Rule
val rule = createComposeRule()
@Test
fun typingUpdatesFrameCount() {
rule.setContent {
AppWithInspector()
}
rule.onNode(hasSetTextAction()).performTextInput("a")
rule.onNodeWithText("Frame 1 of 1").assertIsDisplayed()
rule.onNode(hasSetTextAction()).performTextInput("b")
rule.onNodeWithText("Frame 2 of 2").assertIsDisplayed()
}
@Test
fun addingToListUpdatesFrameCount() {
rule.setContent {
AppWithInspector()
}
rule.onNode(hasSetTextAction()).performTextInput("a")
rule.onNodeWithText("Add to list").performClick()
rule.onNodeWithText("Frame 2 of 2").assertIsDisplayed()
}
@Test
fun sliderScrubsHistory() {
rule.setContent {
AppWithInspector()
}
rule.onNode(hasSetTextAction()).performTextInput("a")
rule.onNode(hasSetTextAction()).performTextInput("b")
rule.onNode(hasSetTextAction()).assertTextEquals("ab")
rule.onNode(hasSetProgressAction()).assertProgressValue(2f)
rule.onNode(hasSetProgressAction()).performSetProgress(1f)
rule.onNode(hasSetTextAction()).assertTextEquals("a")
rule.onNodeWithText("Frame 1 of 2").assertIsDisplayed()
}
private fun hasSetProgressAction() = SemanticsMatcher("has setProgress action") {
it.config.contains(SemanticsActions.SetProgress)
}
private fun SemanticsNodeInteraction.assertProgressValue(value: Float) {
assertThat(
fetchSemanticsNode().config[SemanticsProperties.ProgressBarRangeInfo].current
).isEqualTo(value)
}
private fun SemanticsNodeInteraction.performSetProgress(value: Float) {
fetchSemanticsNode().config[SemanticsActions.SetProgress].action!!.invoke(value)
}
}
================================================
FILE: demo/src/main/AndroidManifest.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.StateHistoryDemo"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true"
android:label="@string/app_name"
android:theme="@style/Theme.StateHistoryDemo"
android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/App.kt
================================================
package com.zachklipp.statehistory.demo
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.foundation.text.KeyboardActions
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.Button
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.input.ImeAction
import androidx.compose.ui.text.input.TextFieldValue
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.zachklipp.statehistory.trackStateHistory
@Preview(showBackground = true, showSystemUi = true)
@Composable
fun AppPreview() {
App()
}
@Composable
fun App() {
var textValue by remember { mutableStateOf(TextFieldValue("")) }.trackStateHistory()
val valueList = remember { mutableStateListOf<String>() }.trackStateHistory()
fun addValueToList() {
valueList += textValue.text
textValue = TextFieldValue("")
}
Column(Modifier.padding(8.dp)) {
TextField(
modifier = Modifier.fillMaxWidth(),
value = textValue,
onValueChange = { textValue = it },
keyboardOptions = KeyboardOptions(imeAction = ImeAction.Send),
keyboardActions = KeyboardActions { addValueToList() }
)
Button(
modifier = Modifier.fillMaxWidth(),
onClick = { addValueToList() }
) {
Text("Add to list")
}
LazyColumn(
reverseLayout = true,
modifier = Modifier
.border(1.dp, Color.Black)
.fillMaxWidth()
) {
items(valueList) {
Text(it, modifier = Modifier.padding(16.dp))
}
}
}
}
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/AppWithInspector.kt
================================================
package com.zachklipp.statehistory.demo
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewmodel.compose.viewModel
import com.zachklipp.statehistory.StateHistory
import com.zachklipp.statehistory.demo.ui.theme.StateHistoryDemoTheme
@Composable
fun AppWithInspector() {
val stateHistory = viewModel<StateHistoryViewModel>().stateHistory
StateHistoryDemoTheme {
// A surface container using the 'background' color from the theme
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background
) {
StateHistoryInspector(stateHistory) {
App()
}
}
}
}
class StateHistoryViewModel : ViewModel() {
val stateHistory = StateHistory()
}
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/MainActivity.kt
================================================
package com.zachklipp.statehistory.demo
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.ui.Modifier
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewmodel.compose.viewModel
import com.zachklipp.statehistory.StateHistory
import com.zachklipp.statehistory.demo.ui.theme.StateHistoryDemoTheme
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
AppWithInspector()
}
}
}
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/StateHistoryInspector.kt
================================================
package com.zachklipp.statehistory.demo
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.ArrowBack
import androidx.compose.material.icons.filled.ArrowForward
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.zachklipp.statehistory.*
import kotlin.math.roundToInt
@Composable
fun StateHistoryInspector(
stateHistory: StateHistory,
modifier: Modifier = Modifier,
content: @Composable () -> Unit
) {
Column(modifier) {
Box(propagateMinConstraints = true, modifier = Modifier.weight(1f)) {
CompositionLocalProvider(LocalStateHistory provides stateHistory, content = content)
}
HistoryScrubber(stateHistory)
}
}
@Composable
private fun HistoryScrubber(stateHistory: StateHistory, modifier: Modifier = Modifier) {
var recording by remember { mutableStateOf(true) }
if (recording) {
LaunchedEffect(stateHistory) {
stateHistory.recordChanges {
// Save a new frame every time something changes. This could also be done on a
// timer, or only after significant actions.
stateHistory.saveFrame()
}
}
}
Column(modifier.padding(8.dp)) {
if (stateHistory.frameCount > 1) {
Text(
"Frame ${stateHistory.currentFrame} of ${stateHistory.frameCount - 1}",
modifier = Modifier.align(Alignment.CenterHorizontally),
style = MaterialTheme.typography.caption,
)
Row(
modifier = Modifier.fillMaxWidth(),
verticalAlignment = Alignment.CenterVertically,
) {
Slider(
value = stateHistory.currentFrame.toFloat(),
valueRange = 0f..(stateHistory.frameCount - 1).toFloat(),
steps = stateHistory.frameCount - 2,
onValueChange = { stateHistory.setCurrentFrameGlobally(it.roundToInt()) },
modifier = Modifier
.weight(1f)
.padding(horizontal = 16.dp)
)
}
Row(modifier = Modifier.fillMaxWidth()) {
IconButton(
onClick = { stateHistory.undo() },
enabled = stateHistory.canUndo,
modifier = Modifier.weight(1f)
) {
Icon(Icons.Default.ArrowBack, contentDescription = "undo")
}
Button(onClick = { recording = !recording }) {
Text(if (recording) "Stop recording" else "Start recording")
}
IconButton(
onClick = { stateHistory.redo() },
enabled = stateHistory.canRedo,
modifier = Modifier.weight(1f)
) {
Icon(Icons.Default.ArrowForward, contentDescription = "redo")
}
}
}
}
}
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Color.kt
================================================
package com.zachklipp.statehistory.demo.ui.theme
import androidx.compose.ui.graphics.Color
val Purple200 = Color(0xFFBB86FC)
val Purple500 = Color(0xFF6200EE)
val Purple700 = Color(0xFF3700B3)
val Teal200 = Color(0xFF03DAC5)
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Shape.kt
================================================
package com.zachklipp.statehistory.demo.ui.theme
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.Shapes
import androidx.compose.ui.unit.dp
val Shapes = Shapes(
small = RoundedCornerShape(4.dp),
medium = RoundedCornerShape(4.dp),
large = RoundedCornerShape(0.dp)
)
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Theme.kt
================================================
package com.zachklipp.statehistory.demo.ui.theme
import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.material.MaterialTheme
import androidx.compose.material.darkColors
import androidx.compose.material.lightColors
import androidx.compose.runtime.Composable
private val DarkColorPalette = darkColors(
primary = Purple200,
primaryVariant = Purple700,
secondary = Teal200
)
private val LightColorPalette = lightColors(
primary = Purple500,
primaryVariant = Purple700,
secondary = Teal200
/* Other default colors to override
background = Color.White,
surface = Color.White,
onPrimary = Color.White,
onSecondary = Color.Black,
onBackground = Color.Black,
onSurface = Color.Black,
*/
)
@Composable
fun StateHistoryDemoTheme(
darkTheme: Boolean = isSystemInDarkTheme(),
content: @Composable () -> Unit
) {
val colors = if (darkTheme) {
DarkColorPalette
} else {
LightColorPalette
}
MaterialTheme(
colors = colors,
typography = Typography,
shapes = Shapes,
content = content
)
}
================================================
FILE: demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Type.kt
================================================
package com.zachklipp.statehistory.demo.ui.theme
import androidx.compose.material.Typography
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.sp
// Set of Material typography styles to start with
val Typography = Typography(
body1 = TextStyle(
fontFamily = FontFamily.Default,
fontWeight = FontWeight.Normal,
fontSize = 16.sp
)
/* Other default text styles to override
button = TextStyle(
fontFamily = FontFamily.Default,
fontWeight = FontWeight.W500,
fontSize = 14.sp
),
caption = TextStyle(
fontFamily = FontFamily.Default,
fontWeight = FontWeight.Normal,
fontSize = 12.sp
)
*/
)
================================================
FILE: demo/src/main/res/drawable/ic_launcher_background.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="108dp"
android:height="108dp"
android:viewportWidth="108"
android:viewportHeight="108">
<path
android:fillColor="#3DDC84"
android:pathData="M0,0h108v108h-108z" />
<path
android:fillColor="#00000000"
android:pathData="M9,0L9,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,0L19,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M29,0L29,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M39,0L39,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M49,0L49,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M59,0L59,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M69,0L69,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M79,0L79,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M89,0L89,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M99,0L99,108"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,9L108,9"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,19L108,19"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,29L108,29"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,39L108,39"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,49L108,49"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,59L108,59"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,69L108,69"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,79L108,79"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,89L108,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M0,99L108,99"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,29L89,29"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,39L89,39"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,49L89,49"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,59L89,59"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,69L89,69"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M19,79L89,79"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M29,19L29,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M39,19L39,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M49,19L49,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M59,19L59,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M69,19L69,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
<path
android:fillColor="#00000000"
android:pathData="M79,19L79,89"
android:strokeWidth="0.8"
android:strokeColor="#33FFFFFF" />
</vector>
================================================
FILE: demo/src/main/res/drawable-v24/ic_launcher_foreground.xml
================================================
<vector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:aapt="http://schemas.android.com/aapt"
android:width="108dp"
android:height="108dp"
android:viewportWidth="108"
android:viewportHeight="108">
<path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
<aapt:attr name="android:fillColor">
<gradient
android:endX="85.84757"
android:endY="92.4963"
android:startX="42.9492"
android:startY="49.59793"
android:type="linear">
<item
android:color="#44000000"
android:offset="0.0" />
<item
android:color="#00000000"
android:offset="1.0" />
</gradient>
</aapt:attr>
</path>
<path
android:fillColor="#FFFFFF"
android:fillType="nonZero"
android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
android:strokeWidth="1"
android:strokeColor="#00000000" />
</vector>
================================================
FILE: demo/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
<background android:drawable="@drawable/ic_launcher_background" />
<foreground android:drawable="@drawable/ic_launcher_foreground" />
</adaptive-icon>
================================================
FILE: demo/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
<background android:drawable="@drawable/ic_launcher_background" />
<foreground android:drawable="@drawable/ic_launcher_foreground" />
</adaptive-icon>
================================================
FILE: demo/src/main/res/values/colors.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="purple_200">#FFBB86FC</color>
<color name="purple_500">#FF6200EE</color>
<color name="purple_700">#FF3700B3</color>
<color name="teal_200">#FF03DAC5</color>
<color name="teal_700">#FF018786</color>
<color name="black">#FF000000</color>
<color name="white">#FFFFFFFF</color>
</resources>
================================================
FILE: demo/src/main/res/values/strings.xml
================================================
<resources>
<string name="app_name">State History Demo</string>
</resources>
================================================
FILE: demo/src/main/res/values/themes.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Theme.StateHistoryDemo" parent="android:Theme.Material.Light.NoActionBar">
<item name="android:statusBarColor">@color/purple_700</item>
</style>
</resources>
================================================
FILE: demo/src/main/res/xml/backup_rules.xml
================================================
<?xml version="1.0" encoding="utf-8"?><!--
Sample backup rules file; uncomment and customize as necessary.
See https://developer.android.com/guide/topics/data/autobackup
for details.
Note: This file is ignored for devices older that API 31
See https://developer.android.com/about/versions/12/backup-restore
-->
<full-backup-content>
<!--
<include domain="sharedpref" path="."/>
<exclude domain="sharedpref" path="device.xml"/>
-->
</full-backup-content>
================================================
FILE: demo/src/main/res/xml/data_extraction_rules.xml
================================================
<?xml version="1.0" encoding="utf-8"?><!--
Sample data extraction rules file; uncomment and customize as necessary.
See https://developer.android.com/about/versions/12/backup-restore#xml-changes
for details.
-->
<data-extraction-rules>
<cloud-backup>
<!-- TODO: Use <include> and <exclude> to control what is backed up.
<include .../>
<exclude .../>
-->
</cloud-backup>
<!--
<device-transfer>
<include .../>
<exclude .../>
</device-transfer>
-->
</data-extraction-rules>
================================================
FILE: gradle/wrapper/gradle-wrapper.properties
================================================
#Fri Sep 16 16:06:11 PDT 2022
distributionBase=GRADLE_USER_HOME
distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
distributionPath=wrapper/dists
zipStorePath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
================================================
FILE: gradle.properties
================================================
# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true
# AndroidX package structure to make it clearer which packages are bundled with the
# Android operating system, and which are packaged with your app's APK
# https://developer.android.com/topic/libraries/support-library/androidx-rn
android.useAndroidX=true
# Kotlin code style for this project: "official" or "obsolete":
kotlin.code.style=official
# Enables namespacing of each library's R class so that its R class includes only the
# resources declared in the library itself and none from the library's dependencies,
# thereby reducing the size of the R class for that library
android.nonTransitiveRClass=true
================================================
FILE: gradlew
================================================
#!/usr/bin/env sh
#
# Copyright 2015 the original author or authors.
#
# 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
#
# https://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.
#
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn () {
echo "$*"
}
die () {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin or MSYS, switch paths to Windows format before running java
if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=`expr $i + 1`
done
case $i in
0) set -- ;;
1) set -- "$args0" ;;
2) set -- "$args0" "$args1" ;;
3) set -- "$args0" "$args1" "$args2" ;;
4) set -- "$args0" "$args1" "$args2" "$args3" ;;
5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Escape application args
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=`save "$@"`
# Collect all arguments for the java command, following the shell quoting and substitution rules
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
exec "$JAVACMD" "$@"
================================================
FILE: gradlew.bat
================================================
@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto execute
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega
================================================
FILE: settings.gradle
================================================
pluginManagement {
repositories {
google()
mavenCentral()
gradlePluginPortal()
}
}
dependencyResolutionManagement {
repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
repositories {
google()
mavenCentral()
}
}
rootProject.name = "State History"
include ':demo'
include ':statehistory'
================================================
FILE: statehistory/.gitignore
================================================
/build
================================================
FILE: statehistory/build.gradle
================================================
plugins {
id 'com.android.library'
id 'org.jetbrains.kotlin.android'
id 'com.vanniktech.maven.publish'
}
android {
namespace 'com.zachklipp.statehistory'
compileSdk 33
defaultConfig {
minSdk 21
targetSdk 33
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
buildFeatures {
compose true
}
composeOptions {
kotlinCompilerExtensionVersion '1.3.1'
}
packagingOptions {
resources {
excludes += '/META-INF/{AL2.0,LGPL2.1}'
}
}
}
dependencies {
api "androidx.compose.runtime:runtime:$compose_ui_version"
testImplementation 'junit:junit:4.13.2'
testImplementation 'com.google.truth:truth:1.1.3'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_ui_version"
androidTestImplementation 'com.google.truth:truth:1.1.3'
debugImplementation "androidx.compose.ui:ui-tooling:$compose_ui_version"
debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_ui_version"
}
================================================
FILE: statehistory/gradle.properties
================================================
SONATYPE_HOST=DEFAULT
RELEASE_SIGNING_ENABLED=true
GROUP=com.zachklipp.compose-undo
POM_ARTIFACT_ID=statehistory
VERSION_NAME=0.2.0
POM_NAME=Compose Undo State History
POM_DESCRIPTION=Undo snapshot state changes in Compose.
POM_INCEPTION_YEAR=2022
POM_URL=https://github.com/zach-klippenstein/compose-undo/
POM_LICENSE_NAME=The Apache Software License, Version 2.0
POM_LICENSE_URL=https://www.apache.org/licenses/LICENSE-2.0.txt
POM_LICENSE_DIST=repo
POM_SCM_URL=https://github.com/zach-klippenstein/compose-undo/
POM_SCM_CONNECTION=scm:git:git://github.com/zach-klippenstein/compose-undo.git
POM_SCM_DEV_CONNECTION=scm:git:ssh://git@github.com/zach-klippenstein/compose-undo.git
POM_DEVELOPER_ID=zachklipp
POM_DEVELOPER_NAME=Zach Klippenstein
POM_DEVELOPER_URL=https://github.com/zach-klippenstein/
================================================
FILE: statehistory/proguard-rules.pro
================================================
# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
# http://developer.android.com/guide/developing/tools/proguard.html
# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
# public *;
#}
# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable
# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile
================================================
FILE: statehistory/src/androidTest/java/com/zachklipp/statehistory/demo/StateHistoryTest.kt
================================================
package com.zachklipp.statehistory.demo
import androidx.compose.runtime.mutableStateOf
import androidx.compose.ui.test.junit4.createComposeRule
import androidx.test.ext.junit.runners.AndroidJUnit4
import com.google.common.truth.Truth.assertThat
import com.zachklipp.statehistory.StateHistory
import com.zachklipp.statehistory.WithStateHistory
import com.zachklipp.statehistory.trackStateHistory
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith
@RunWith(AndroidJUnit4::class)
class StateHistoryTest {
@get:Rule
val rule = createComposeRule()
@Test
fun withStateHistory_recordsChanges() {
val state = mutableStateOf(0)
lateinit var stateHistory: StateHistory
rule.setContent {
WithStateHistory {
stateHistory = it
state.trackStateHistory()
}
}
rule.runOnIdle {
assertThat(stateHistory.frameCount).isEqualTo(0)
state.value = 1
}
rule.runOnIdle {
assertThat(stateHistory.frameCount).isEqualTo(1)
}
}
}
================================================
FILE: statehistory/src/main/AndroidManifest.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<manifest />
================================================
FILE: statehistory/src/main/java/com/zachklipp/statehistory/StateHistory.kt
================================================
package com.zachklipp.statehistory
import androidx.compose.runtime.*
import androidx.compose.runtime.collection.mutableVectorOf
import androidx.compose.runtime.snapshots.*
import kotlinx.coroutines.awaitCancellation
import java.util.*
import kotlin.contracts.ExperimentalContracts
import kotlin.contracts.contract
private const val DEBUG = true
private const val TAG = "StateHistory"
val LocalStateHistory: ProvidableCompositionLocal<StateHistory?> = staticCompositionLocalOf { null }
/**
* Convenience function for simple usage of [StateHistory].
*
* Inside [content], call [MutableState.trackStateHistory], [SnapshotStateList.trackStateHistory],
* and [SnapshotStateMap.trackStateHistory] to register state objects for change tracking, or pass
* them to [StateHistory.startTrackingState]. Then use the [StateHistory.undo], [StateHistory.redo],
* and [StateHistory.setCurrentFrameGlobally] methods to restore state.
*/
@Composable
fun WithStateHistory(content: @Composable (StateHistory) -> Unit) {
val stateHistory = remember { StateHistory() }
LaunchedEffect(stateHistory) {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
CompositionLocalProvider(LocalStateHistory provides stateHistory) {
content(stateHistory)
}
}
/**
* Records changes to state objects that are registered via [startTrackingState] (or
* [trackStateHistory]) and allows restoring state to previous values.
*
* ## Usage
*
* ### Simple
*
* 1. Wrap your composition in [WithStateHistory].
* 2. Call [MutableState.trackStateHistory] on the states you want to track. (See also
* [SnapshotStateList.trackStateHistory], [SnapshotStateMap.trackStateHistory].)
* 3. Call [StateHistory.undo] to undo changes.
*
* ### Advanced
*
* 1. Create an instance of this that will live across recompositions (e.g. use remember or store
* near the top of your DI object graph).
* 1. Provide the instance to your composition through the [LocalStateHistory] composition local.
* 1. Call [recordChanges] from a coroutine to start recording changes. To save a new history frame
* every time some state changes are applied, pass a callback that calls [saveFrame].
* 1. Register states you want to track with [startTrackingState]. Make sure to call
* [stopTrackingState] when finished with the state object to allow it to be garbage-collected.
* If creating the state directly in a composition (e.g. with [remember]), you can also pass the
* state object to [trackStateHistory] to automatically stop tracking it when it leaves the
* composition.
* 1. Call [setCurrentFrameGlobally] to restore the state of all tracked objects to the states they
* had at the given frame, or call the convenience methods [undo]/[redo] to move the frame by one.
*
* ## Defining save points
*
* History frames will only be pushed onto the stack when [safeFrame] is called. You can call this
* method whenever you want, so the granularity of the history is up to you. To get the most detail,
* call it from the [recordChanges] callback, which will be invoked every time a snapshot is applied
* to the global snapshot that changes one or more tracked state objects. If that's too much detail
* for your use case, you can pass a null callback to [recordChanges] and call [saveFrame] only
* whenever something significant happens in your app, at regular intervals with a timer, etc.
*
* **Key point: State changes from a single snapshot will always be saved to the same frame.**
*
* @sample WithStateHistory
*/
@Stable
class StateHistory {
/**
* Used to guard access to [frames], [trackedStates], and [nextFrame].
*/
private val lock = Any()
/**
* The set of all state objects we're currently tracking via [startTrackingState].
*/
private val trackedStates = WeakHashMap<StateObject, Unit>()
private var handle: ObserverHandle? = null
/**
* By storing and restoring [StateRecord]s directly, we don't have to care what types the state
* objects are or even what data they hold. The records already implement all the operations
* we need.
*/
private val frames = mutableVectorOf<WeakHashMap<StateObject, StateRecord>>()
/**
* We "start" recording the next frame as soon as the previous one is committed to the [frames]
* list. This way we can eagerly record the initial value of newly-tracked objects from
* [startTrackingState] so that their initial values will be saved on the next frame, even if
* they're not recorded as changed. Maybe unnecessary?
*/
private var nextFrame = WeakHashMap<StateObject, StateRecord>()
private var onTrackStateApplied: (() -> Unit)? = null
/**
* The total number of history frames that have been recorded.
*/
var frameCount: Int by mutableStateOf(0)
private set
/**
* The index of frame that represents the current state. When the global snapshot is advanced
* with changes to tracked state, this value will be incremented. It can also be set to a lower
* value by calling [setCurrentFrameGlobally].
*/
var currentFrame: Int by mutableStateOf(NoFrame)
private set
/**
* Starts recording changes and suspends until cancelled.
*
* @param onTrackStateApplied Called every time a snapshot is applied to the global snapshot
* that changes any of the state objects tracked via [startTrackingState]. Call [saveFrame] from
* this callback to save every change to the history.
*/
suspend fun recordChanges(onTrackStateApplied: (() -> Unit)? = null) {
if (!startRecording(onTrackStateApplied)) return
try {
awaitCancellation()
} finally {
stopRecording(clearOnTrackStateApplied = true)
}
}
/**
* Saves any changes to tracked state objects since the last call to this method to the history.
*
* If [currentFrame] is not the last frame, any frames after it will be removed.
*/
fun saveFrame() {
// Take the lock outside the snapshot so
// This won't conflict with the lock in the apply observer when the snapshot is applied
// because the none of the states changed in this snapshot are tracked.
synchronized(lock) {
withGlobalMutableSnapshot {
if (DEBUG) println("[$TAG] Recording frame ${currentFrame + 1}: $nextFrame")
// If committing a new frame while peeking into the history, clear the
// frames after this point and start recording fresh.
if (frames.lastIndex > currentFrame) {
frames.removeRange(currentFrame + 1, frames.size)
}
frames += nextFrame
nextFrame = WeakHashMap()
frameCount = frames.size
currentFrame = frames.lastIndex
}
}
}
/**
* Starts tracking changes [stateObject]. The current value of the object will be recorded in
* the next frame, i.e. the next time the global snapshot is applied while
* [recording][startRecording].
*
* Calling [stopTrackingState] after this method is optional. If it's not called, the history
* for the state object will be cleaned up when it's garbage collected.
*
* @param stateObject Must be a snapshot state object, such as a [MutableState],
* [SnapshotStateList], etc. The concrete object must implement [StateObject].
*/
fun <S : Any> startTrackingState(stateObject: S) {
ensureValidStateObject(stateObject)
if (stateObject in trackedStates) return
// Record the initial state of the object in the next frame to be committed.
val initialRecord = stateObject.copyCurrentRecord()
synchronized(lock) {
trackedStates[stateObject] = Unit
nextFrame[stateObject] = initialRecord
}
if (DEBUG) println(
"[$TAG] Starting to track object $stateObject with initial record $initialRecord"
)
}
/**
* Stops tracking changes to [stateObject].
*
* Calling this method after [startTrackingState] is optional. If it's not called, the history
* for the state object will be cleaned up when it's garbage collected.
*/
fun stopTrackingState(stateObject: Any) {
stateObject as StateObject
if (DEBUG) println("[$TAG] Stopping tracking object $stateObject")
synchronized(lock) {
trackedStates -= stateObject
nextFrame -= stateObject
// Remove all references to the state object from the history so it can be GC'd.
// TODO Figure out a way to do this without iterating through the entire history.
// WeakRefs?
frames.forEach {
it -= stateObject
}
}
}
/**
* Restores the values of all tracked state objects to the values they had at the frame at
* [frameIndex]. Calling this method will not change [frameCount] immediately, although the next
* time a tracked state is changed and applied to the global snapshot, all frames between
* [currentFrame] and [frameCount] will be removed and replaced with a new frame.
*
* The [frameIndex] will be coerced into the valid frame range, and this function will do
* nothing if equal to [currentFrame].
*/
fun setCurrentFrameGlobally(frameIndex: Int) {
if (frameIndex == currentFrame) return
// Stop recording so we don't record the application of the mutable snapshot below as a
// new frame. Use the return value instead of isRecording to avoid a race.
// Don't clear the callback so we can re-use it after.
val wasRecording = stopRecording(clearOnTrackStateApplied = false)
if (DEBUG) println(
"[$TAG] Pausing recording to set current frame (wasRecording=$wasRecording)"
)
// Peeking in non-global snapshots is not currently supported.
synchronized(lock) {
withGlobalMutableSnapshot {
@Suppress("NAME_SHADOWING")
val frameIndex = frameIndex.coerceIn(0, frames.lastIndex)
if (DEBUG) println("[$TAG] Setting current frame to $frameIndex")
// Check again after coercing.
if (frameIndex == currentFrame) return
currentFrame = frameIndex
trackedStates.forEach { (stateObject, _) ->
// Find the latest frame containing the state object, if any.
var readFrameIndex = frameIndex
while (readFrameIndex >= 0 && stateObject !in frames[readFrameIndex]) {
readFrameIndex--
}
if (readFrameIndex >= 0) {
val frame = frames[readFrameIndex]
val record = frame.getValue(stateObject)
if (DEBUG) println("[$TAG] Restoring $stateObject to $record")
stateObject.restoreFrom(record)
} else if (DEBUG) {
println("[$TAG] Couldn't find value for $stateObject in history")
}
}
// When the mutableSnapshot is applied, we'll synchronously get an apply
// observer callback - or we would, if we hadn't stopped recording. After that,
// it's safe to stop recording again.
}
}
if (wasRecording) {
if (DEBUG) println("[$TAG] Resuming recording after setting current frame")
// Keep using the old callback.
startRecording(onTrackStateApplied)
}
}
/**
* Starts recording state changes. This is a no-op if recording has already been started.
*
* @return True if recording was successfully started, false if already recording.
*/
private fun startRecording(onTrackStateApplied: (() -> Unit)?): Boolean {
if (handle != null) {
if (DEBUG) println("[$TAG] Recording already started, ignoring start request")
return false
}
if (DEBUG) println("[$TAG] Starting recording")
synchronized(lock) {
if (handle != null) return false
this.onTrackStateApplied = onTrackStateApplied
handle = Snapshot.registerApplyObserver(this::onApply)
return true
}
}
/**
* Stops recording state changes.
*
* @return True if recording was stopped, false if it was not started.
*/
private fun stopRecording(clearOnTrackStateApplied: Boolean): Boolean {
if (DEBUG) println("[$TAG] Stopping recording")
if (handle == null) return false
synchronized(lock) {
if (handle == null) return false
handle!!.dispose()
handle = null
if (clearOnTrackStateApplied) {
onTrackStateApplied = null
}
return true
}
}
private fun onApply(changedStates: Set<Any>, snapshot: Snapshot) {
var atLeastOneTrackedStateChanged = false
// Read values inside the snapshot to avoid race conditions.
snapshot.withNestedSnapshot {
synchronized(lock) {
changedStates.forEach { stateObject ->
stateObject as StateObject
if (stateObject in trackedStates) {
atLeastOneTrackedStateChanged = true
nextFrame[stateObject] = stateObject.copyCurrentRecord()
}
}
}
}
if (atLeastOneTrackedStateChanged) {
if (DEBUG) println("[$TAG] Tracked state changes were applied, invoking callback")
onTrackStateApplied?.invoke()
}
}
private inline fun withGlobalMutableSnapshot(block: () -> Unit) {
Snapshot.global {
Snapshot.withMutableSnapshot(block)
}
}
private inline fun Snapshot.withNestedSnapshot(block: () -> Unit) {
takeNestedSnapshot().run {
try {
enter(block)
} finally {
dispose()
}
}
}
/**
* Returns a copy of this object's current readable record, without recording a read. The record
* is a copy since the original record could be reused at any point in the future.
*/
private fun StateObject.copyCurrentRecord(): StateRecord {
val newRecord = firstStateRecord.create()
firstStateRecord.withCurrent { current ->
newRecord.assign(current)
}
return newRecord
}
/**
* Copies [record] into the write record for this state object in the current snapshot.
*/
private fun StateObject.restoreFrom(record: StateRecord) {
firstStateRecord.writable(this) {
assign(record)
}
}
companion object {
const val NoFrame: Int = -1
}
}
@Composable
fun <S : Any> trackStateHistory(stateObject: S): S {
ensureValidStateObject(stateObject)
val stateHistory = LocalStateHistory.current ?: return stateObject
DisposableEffect(stateHistory, stateObject) {
stateHistory.startTrackingState(stateObject)
onDispose {
stateHistory.stopTrackingState(stateObject)
}
}
return stateObject
}
val StateHistory.canUndo: Boolean get() = currentFrame > 0
val StateHistory.canRedo: Boolean get() = currentFrame < frameCount - 1
/**
* Sets the current frame to the previous frame.
*/
fun StateHistory.undo() {
setCurrentFrameGlobally(currentFrame - 1)
}
/**
* Sets the current frame to the next frame.
*/
fun StateHistory.redo() {
setCurrentFrameGlobally(currentFrame + 1)
}
@Suppress("NOTHING_TO_INLINE")
@Composable
inline fun <T> MutableState<T>.trackStateHistory(): MutableState<T> =
trackStateHistory(this)
@Suppress("NOTHING_TO_INLINE")
@Composable
inline fun <T> SnapshotStateList<T>.trackStateHistory(): SnapshotStateList<T> =
trackStateHistory(this)
@Suppress("NOTHING_TO_INLINE")
@Composable
inline fun <K, V> SnapshotStateMap<K, V>.trackStateHistory(): SnapshotStateMap<K, V> =
trackStateHistory(this)
@OptIn(ExperimentalContracts::class)
private fun ensureValidStateObject(stateObject: Any) {
contract { returns() implies (stateObject is StateObject) }
require(stateObject is StateObject) {
"Can only track objects that are instance of StateObject, which this is not: $stateObject"
}
}
================================================
FILE: statehistory/src/test/java/com/zachklipp/statehistory/demo/StateHistoryTest.kt
================================================
package com.zachklipp.statehistory.demo
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.snapshots.Snapshot
import com.google.common.truth.Truth.assertThat
import com.zachklipp.statehistory.StateHistory
import com.zachklipp.statehistory.redo
import com.zachklipp.statehistory.undo
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.cancel
import kotlinx.coroutines.launch
import org.junit.After
import org.junit.Test
class StateHistoryTest {
private val stateHistory = StateHistory()
private val scope = CoroutineScope(Dispatchers.Unconfined)
@After
fun tearDown() {
scope.cancel()
}
@Test
fun initialFrameCount() {
assertThat(stateHistory.frameCount).isEqualTo(0)
}
@Test
fun initialCurrentFrame() {
assertThat(stateHistory.currentFrame).isEqualTo(StateHistory.NoFrame)
}
@Test
fun recordsChanges_whenStartTrackingAfterRecording() {
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
assertThat(stateHistory.frameCount).isEqualTo(0)
Snapshot.sendApplyNotifications()
assertThat(stateHistory.frameCount).isEqualTo(0)
Snapshot.withMutableSnapshot {
state.value = 1
}
assertThat(stateHistory.frameCount).isEqualTo(1)
assertThat(stateHistory.currentFrame).isEqualTo(0)
}
@Test
fun recordsChanges_whenStartRecordingAfterTracking() {
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
assertThat(stateHistory.frameCount).isEqualTo(0)
Snapshot.sendApplyNotifications()
assertThat(stateHistory.frameCount).isEqualTo(0)
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
Snapshot.withMutableSnapshot {
state.value = 1
}
assertThat(stateHistory.frameCount).isEqualTo(1)
assertThat(stateHistory.currentFrame).isEqualTo(0)
}
@Test
fun noops_whenChangeCallbackIsNull() {
scope.launch {
stateHistory.recordChanges()
}
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
Snapshot.withMutableSnapshot {
state.value = 1
}
assertThat(stateHistory.frameCount).isEqualTo(0)
assertThat(stateHistory.currentFrame).isEqualTo(StateHistory.NoFrame)
}
@Test
fun setCurrentFrameGlobally_restoresState() {
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
Snapshot.withMutableSnapshot {
state.value = 1
}
Snapshot.withMutableSnapshot {
state.value = 2
}
assertThat(stateHistory.frameCount).isEqualTo(2)
assertThat(stateHistory.currentFrame).isEqualTo(1)
assertThat(state.value).isEqualTo(2)
stateHistory.setCurrentFrameGlobally(0)
assertThat(stateHistory.frameCount).isEqualTo(2)
assertThat(stateHistory.currentFrame).isEqualTo(0)
assertThat(state.value).isEqualTo(1)
}
@Test
fun settingState_afterUndo_clearsPreviousFutureState() {
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
Snapshot.withMutableSnapshot {
state.value = 1
}
Snapshot.withMutableSnapshot {
state.value = 2
}
assertThat(stateHistory.frameCount).isEqualTo(2)
assertThat(stateHistory.currentFrame).isEqualTo(1)
assertThat(state.value).isEqualTo(2)
// Undo one and change the value.
stateHistory.setCurrentFrameGlobally(0)
Snapshot.withMutableSnapshot {
state.value = 3
}
// That should have overwritten the previous frame in which state was 2.
assertThat(stateHistory.frameCount).isEqualTo(2)
assertThat(stateHistory.currentFrame).isEqualTo(1)
assertThat(state.value).isEqualTo(3)
// But preserve the frame where state is 1.
stateHistory.setCurrentFrameGlobally(0)
assertThat(stateHistory.frameCount).isEqualTo(2)
assertThat(stateHistory.currentFrame).isEqualTo(0)
assertThat(state.value).isEqualTo(1)
}
@Test
fun tracksMultipleStateChanges() {
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state1 = mutableStateOf(0)
stateHistory.startTrackingState(state1)
Snapshot.withMutableSnapshot {
state1.value = 1
}
assertThat(stateHistory.frameCount).isEqualTo(1)
val state2 = mutableStateOf(10)
stateHistory.startTrackingState(state2)
Snapshot.withMutableSnapshot {
state2.value = 20
}
assertThat(stateHistory.frameCount).isEqualTo(2)
}
@Test
fun restoresMultipleStateChanges() {
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state1 = mutableStateOf(0)
stateHistory.startTrackingState(state1)
Snapshot.withMutableSnapshot {
state1.value = 1
}
val state2 = mutableStateOf(0)
stateHistory.startTrackingState(state2)
Snapshot.withMutableSnapshot {
state2.value = 10
}
Snapshot.withMutableSnapshot {
state2.value = 20
}
// Add a frame where both are set at once.
Snapshot.withMutableSnapshot {
state1.value = 2
state2.value = 30
}
stateHistory.undo()
assertThat(state1.value).isEqualTo(1)
assertThat(state2.value).isEqualTo(20)
stateHistory.undo()
assertThat(state1.value).isEqualTo(1)
assertThat(state2.value).isEqualTo(10)
stateHistory.redo()
assertThat(state1.value).isEqualTo(1)
assertThat(state2.value).isEqualTo(20)
}
@Test
fun stopTracking_whenStateObjectUnregistered() {
scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
Snapshot.withMutableSnapshot {
state.value = 1
}
assertThat(stateHistory.frameCount).isEqualTo(1)
assertThat(stateHistory.currentFrame).isEqualTo(0)
stateHistory.stopTrackingState(state)
Snapshot.withMutableSnapshot {
state.value = 2
}
assertThat(stateHistory.frameCount).isEqualTo(1)
assertThat(stateHistory.currentFrame).isEqualTo(0)
}
@Test
fun stopTracking_whenRecordingStopped() {
val job = scope.launch {
stateHistory.recordChanges {
stateHistory.saveFrame()
}
}
val state = mutableStateOf(0)
stateHistory.startTrackingState(state)
Snapshot.withMutableSnapshot {
state.value = 1
}
assertThat(stateHistory.frameCount).isEqualTo(1)
assertThat(stateHistory.currentFrame).isEqualTo(0)
job.cancel()
Snapshot.withMutableSnapshot {
state.value = 2
}
assertThat(stateHistory.frameCount).isEqualTo(1)
assertThat(stateHistory.currentFrame).isEqualTo(0)
}
}
gitextract_r4b_iw8e/
├── .gitignore
├── LICENSE
├── README.md
├── build.gradle
├── demo/
│ ├── .gitignore
│ ├── build.gradle
│ ├── proguard-rules.pro
│ └── src/
│ ├── androidTest/
│ │ └── java/
│ │ └── com/
│ │ └── zachklipp/
│ │ └── statehistory/
│ │ └── demo/
│ │ └── DemoTest.kt
│ └── main/
│ ├── AndroidManifest.xml
│ ├── java/
│ │ └── com/
│ │ └── zachklipp/
│ │ └── statehistory/
│ │ └── demo/
│ │ ├── App.kt
│ │ ├── AppWithInspector.kt
│ │ ├── MainActivity.kt
│ │ ├── StateHistoryInspector.kt
│ │ └── ui/
│ │ └── theme/
│ │ ├── Color.kt
│ │ ├── Shape.kt
│ │ ├── Theme.kt
│ │ └── Type.kt
│ └── res/
│ ├── drawable/
│ │ └── ic_launcher_background.xml
│ ├── drawable-v24/
│ │ └── ic_launcher_foreground.xml
│ ├── mipmap-anydpi-v26/
│ │ ├── ic_launcher.xml
│ │ └── ic_launcher_round.xml
│ ├── values/
│ │ ├── colors.xml
│ │ ├── strings.xml
│ │ └── themes.xml
│ └── xml/
│ ├── backup_rules.xml
│ └── data_extraction_rules.xml
├── gradle/
│ └── wrapper/
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradle.properties
├── gradlew
├── gradlew.bat
├── settings.gradle
└── statehistory/
├── .gitignore
├── build.gradle
├── gradle.properties
├── proguard-rules.pro
└── src/
├── androidTest/
│ └── java/
│ └── com/
│ └── zachklipp/
│ └── statehistory/
│ └── demo/
│ └── StateHistoryTest.kt
├── main/
│ ├── AndroidManifest.xml
│ └── java/
│ └── com/
│ └── zachklipp/
│ └── statehistory/
│ └── StateHistory.kt
└── test/
└── java/
└── com/
└── zachklipp/
└── statehistory/
└── demo/
└── StateHistoryTest.kt
Condensed preview — 40 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (88K chars).
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{
"path": ".gitignore",
"chars": 1693,
"preview": "# Built application files\n*.apk\n*.aar\n*.ap_\n*.aab\n\n# Files for the ART/Dalvik VM\n*.dex\n\n# Java class files\n*.class\n\n# Ge"
},
{
"path": "LICENSE",
"chars": 11357,
"preview": " Apache License\n Version 2.0, January 2004\n "
},
{
"path": "README.md",
"chars": 3034,
"preview": "# compose-undo \n\nTrack c"
},
{
"path": "build.gradle",
"chars": 455,
"preview": "buildscript {\n ext {\n compose_ui_version = '1.3.0-beta02'\n }\n}// Top-level build file where you can add con"
},
{
"path": "demo/.gitignore",
"chars": 6,
"preview": "/build"
},
{
"path": "demo/build.gradle",
"chars": 2093,
"preview": "plugins {\n id 'com.android.application'\n id 'org.jetbrains.kotlin.android'\n}\n\nandroid {\n namespace 'com.zachkli"
},
{
"path": "demo/proguard-rules.pro",
"chars": 750,
"preview": "# Add project specific ProGuard rules here.\n# You can control the set of applied configuration files using the\n# proguar"
},
{
"path": "demo/src/androidTest/java/com/zachklipp/statehistory/demo/DemoTest.kt",
"chars": 2374,
"preview": "package com.zachklipp.statehistory.demo\n\nimport androidx.compose.ui.semantics.SemanticsActions\nimport androidx.compose.u"
},
{
"path": "demo/src/main/AndroidManifest.xml",
"chars": 1210,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<manifest xmlns:android=\"http://schemas.android.com/apk/res/android\"\n xmlns:to"
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{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/App.kt",
"chars": 2168,
"preview": "package com.zachklipp.statehistory.demo\n\nimport androidx.compose.foundation.border\nimport androidx.compose.foundation.la"
},
{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/AppWithInspector.kt",
"chars": 997,
"preview": "package com.zachklipp.statehistory.demo\n\nimport androidx.compose.foundation.layout.fillMaxSize\nimport androidx.compose.m"
},
{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/MainActivity.kt",
"chars": 751,
"preview": "package com.zachklipp.statehistory.demo\n\nimport android.os.Bundle\nimport androidx.activity.ComponentActivity\nimport andr"
},
{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/StateHistoryInspector.kt",
"chars": 3194,
"preview": "package com.zachklipp.statehistory.demo\n\nimport androidx.compose.foundation.layout.*\nimport androidx.compose.material.*\n"
},
{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Color.kt",
"chars": 226,
"preview": "package com.zachklipp.statehistory.demo.ui.theme\n\nimport androidx.compose.ui.graphics.Color\n\nval Purple200 = Color(0xFFB"
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{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Shape.kt",
"chars": 322,
"preview": "package com.zachklipp.statehistory.demo.ui.theme\n\nimport androidx.compose.foundation.shape.RoundedCornerShape\nimport and"
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"path": "demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Theme.kt",
"chars": 1134,
"preview": "package com.zachklipp.statehistory.demo.ui.theme\n\nimport androidx.compose.foundation.isSystemInDarkTheme\nimport androidx"
},
{
"path": "demo/src/main/java/com/zachklipp/statehistory/demo/ui/theme/Type.kt",
"chars": 808,
"preview": "package com.zachklipp.statehistory.demo.ui.theme\n\nimport androidx.compose.material.Typography\nimport androidx.compose.ui"
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{
"path": "demo/src/main/res/drawable/ic_launcher_background.xml",
"chars": 5606,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<vector xmlns:android=\"http://schemas.android.com/apk/res/android\"\n android:wi"
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"path": "demo/src/main/res/drawable-v24/ic_launcher_foreground.xml",
"chars": 1702,
"preview": "<vector xmlns:android=\"http://schemas.android.com/apk/res/android\"\n xmlns:aapt=\"http://schemas.android.com/aapt\"\n "
},
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"path": "demo/src/main/res/mipmap-anydpi-v26/ic_launcher.xml",
"chars": 272,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<adaptive-icon xmlns:android=\"http://schemas.android.com/apk/res/android\">\n <b"
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"path": "demo/src/main/res/values/colors.xml",
"chars": 378,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<resources>\n <color name=\"purple_200\">#FFBB86FC</color>\n <color name=\"purpl"
},
{
"path": "demo/src/main/res/values/strings.xml",
"chars": 80,
"preview": "<resources>\n <string name=\"app_name\">State History Demo</string>\n</resources>"
},
{
"path": "demo/src/main/res/values/themes.xml",
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{
"path": "demo/src/main/res/xml/backup_rules.xml",
"chars": 478,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?><!--\n Sample backup rules file; uncomment and customize as necessary.\n See htt"
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{
"path": "demo/src/main/res/xml/data_extraction_rules.xml",
"chars": 551,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?><!--\n Sample data extraction rules file; uncomment and customize as necessary.\n "
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{
"path": "gradle/wrapper/gradle-wrapper.properties",
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"preview": "#Fri Sep 16 16:06:11 PDT 2022\ndistributionBase=GRADLE_USER_HOME\ndistributionUrl=https\\://services.gradle.org/distributio"
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{
"path": "gradle.properties",
"chars": 1358,
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},
{
"path": "gradlew",
"chars": 5766,
"preview": "#!/usr/bin/env sh\n\n#\n# Copyright 2015 the original author or authors.\n#\n# Licensed under the Apache License, Version 2.0"
},
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"preview": "/build"
},
{
"path": "statehistory/build.gradle",
"chars": 1609,
"preview": "plugins {\n id 'com.android.library'\n id 'org.jetbrains.kotlin.android'\n id 'com.vanniktech.maven.publish'\n}\n\nan"
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"chars": 805,
"preview": "SONATYPE_HOST=DEFAULT\nRELEASE_SIGNING_ENABLED=true\n\nGROUP=com.zachklipp.compose-undo\nPOM_ARTIFACT_ID=statehistory\nVERSIO"
},
{
"path": "statehistory/proguard-rules.pro",
"chars": 750,
"preview": "# Add project specific ProGuard rules here.\n# You can control the set of applied configuration files using the\n# proguar"
},
{
"path": "statehistory/src/androidTest/java/com/zachklipp/statehistory/demo/StateHistoryTest.kt",
"chars": 1106,
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"chars": 51,
"preview": "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<manifest />"
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"path": "statehistory/src/main/java/com/zachklipp/statehistory/StateHistory.kt",
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"chars": 7910,
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// ... and 1 more files (download for full content)
About this extraction
This page contains the full source code of the zach-klippenstein/compose-undo GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 40 files (79.6 KB), approximately 20.5k tokens. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.