Fix crash when viewing source which contains an emoji.

Import source of jsonviewer as a module of this project.

changelog.d/4796.bugfix

@@ -0,0 +1 @@
+Fix crash when viewing source which contains an emoji

dependencies.gradle

@@ -71,6 +71,7 @@ ext.libs = [
                 'espressoIntents'         : "androidx.test.espresso:espresso-intents:$espresso"
         ],
         google      : [
+                // TODO There is 1.6.0?
                 'material'                : "com.google.android.material:material:1.4.0"
         ],
         dagger      : [

dependencies_groups.gradle

@@ -4,7 +4,6 @@ ext.groups = [
                 ],
                 group: [
                         'com.github.Armen101',
-                        'com.github.BillCarsonFr',
                         'com.github.chrisbanes',
                         'com.github.hyuwah',
                         'com.github.jetradarmobile',
@@ -154,6 +153,7 @@ ext.groups = [
                         'org.jetbrains.intellij.deps',
                         'org.jetbrains.kotlin',
                         'org.jetbrains.kotlinx',
+                        'org.json',
                         'org.jsoup',
                         'org.junit',
                         'org.junit.jupiter',

library/jsonviewer/.gitignore

@@ -0,0 +1 @@
+/build

library/jsonviewer/build.gradle

@@ -0,0 +1,64 @@
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-parcelize'
+apply plugin: 'kotlin-kapt'
+apply plugin: 'com.jakewharton.butterknife'
+
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.3'
+    }
+}
+
+android {
+    compileSdk versions.compileSdk
+
+    defaultConfig {
+        minSdk versions.minSdk
+        targetSdk versions.targetSdk
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility versions.sourceCompat
+        targetCompatibility versions.targetCompat
+    }
+
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+}
+
+dependencies {
+    implementation libs.androidx.appCompat
+    implementation libs.androidx.core
+
+    implementation libs.airbnb.epoxy
+    kapt libs.airbnb.epoxyProcessor
+
+    implementation libs.airbnb.mavericks
+    // Span utils
+    implementation 'me.gujun.android:span:1.7'
+
+    implementation libs.google.material
+
+    implementation libs.jetbrains.coroutinesCore
+    implementation libs.jetbrains.coroutinesAndroid
+
+    testImplementation 'org.json:json:20190722'
+    testImplementation libs.tests.junit
+    androidTestImplementation libs.androidx.junit
+    androidTestImplementation libs.androidx.espressoCore
+}

library/jsonviewer/src/main/AndroidManifest.xml

@@ -0,0 +1 @@
+<manifest package="org.billcarsonfr.jsonviewer" />

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/JSonViewerDialog.kt

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.WindowManager
+import androidx.fragment.app.DialogFragment
+import com.airbnb.mvrx.Mavericks
+
+class JSonViewerDialog : DialogFragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_dialog_jv, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val args: JSonViewerFragmentArgs = arguments?.getParcelable(Mavericks.KEY_ARG) ?: return
+        if (savedInstanceState == null) {
+            childFragmentManager.beginTransaction()
+                .replace(
+                    R.id.fragmentContainer, JSonViewerFragment.newInstance(
+                        args.jsonString,
+                        args.defaultOpenDepth,
+                        true,
+                        args.styleProvider
+                    )
+                )
+                .commitNow()
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        // Get existing layout params for the window
+        val params = dialog?.window?.attributes
+        // Assign window properties to fill the parent
+        params?.width = WindowManager.LayoutParams.MATCH_PARENT
+        params?.height = WindowManager.LayoutParams.MATCH_PARENT
+        dialog?.window?.attributes = params
+    }
+
+    companion object {
+        fun newInstance(
+            jsonString: String,
+            initialOpenDepth: Int = -1,
+            styleProvider: JSonViewerStyleProvider? = null
+        ): JSonViewerDialog {
+            val args = Bundle()
+            val parcelableArgs =
+                JSonViewerFragmentArgs(jsonString, initialOpenDepth, false, styleProvider)
+            args.putParcelable(Mavericks.KEY_ARG, parcelableArgs)
+            return JSonViewerDialog().apply { arguments = args }
+        }
+    }
+}

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/JSonViewerEpoxyController.kt

@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import android.content.Context
+import android.view.View
+import com.airbnb.epoxy.TypedEpoxyController
+import com.airbnb.mvrx.Fail
+import com.airbnb.mvrx.Success
+import me.gujun.android.span.Span
+import me.gujun.android.span.span
+
+internal class JSonViewerEpoxyController(private val context: Context) :
+    TypedEpoxyController<JSonViewerState>() {
+
+    private var styleProvider: JSonViewerStyleProvider = JSonViewerStyleProvider.default(context)
+
+    fun setStyle(styleProvider: JSonViewerStyleProvider?) {
+        this.styleProvider = styleProvider ?: JSonViewerStyleProvider.default(context)
+    }
+
+    override fun buildModels(data: JSonViewerState?) {
+        val async = data?.root ?: return
+
+        when (async) {
+            is Fail -> {
+                valueItem {
+                    id("fail")
+                    text(async.error.localizedMessage?.toSafeCharSequence())
+                }
+            }
+            is Success -> {
+                val model = data.root.invoke()
+
+                model?.let {
+                    buildRec(it, 0, "")
+                }
+            }
+        }
+    }
+
+    private fun buildRec(
+        model: JSonViewerModel,
+        depth: Int,
+        idBase: String
+    ) {
+        val host = this
+        val id = "$idBase/${model.key ?: model.index}_${model.isExpanded}}"
+        when (model) {
+            is JSonViewerObject -> {
+                if (model.isExpanded) {
+                    open(id, model.key, model.index, depth, true, model)
+                    model.keys.forEach {
+                        buildRec(it.value, depth + 1, id)
+                    }
+                    close(id, depth, true)
+                } else {
+                    valueItem {
+                        id(id + "_sum")
+                        depth(depth)
+                        text(
+                            span {
+                                if (model.key != null) {
+                                    span("\"${model.key}\"") {
+                                        textColor = host.styleProvider.keyColor
+                                    }
+                                    span(" : ") {
+                                        textColor = host.styleProvider.baseColor
+                                    }
+                                }
+                                if (model.index != null) {
+                                    span("${model.index}") {
+                                        textColor = host.styleProvider.secondaryColor
+                                    }
+                                    span(" : ") {
+                                        textColor = host.styleProvider.baseColor
+                                    }
+                                }
+                                span {
+                                    +"{+${model.keys.size}}"
+                                    textColor = host.styleProvider.baseColor
+                                }
+                            }.toSafeCharSequence()
+                        )
+                        itemClickListener(View.OnClickListener { host.itemClicked(model) })
+                    }
+                }
+            }
+            is JSonViewerArray -> {
+                if (model.isExpanded) {
+                    open(id, model.key, model.index, depth, false, model)
+                    model.items.forEach {
+                        buildRec(it, depth + 1, id)
+                    }
+                    close(id, depth, false)
+                } else {
+                    valueItem {
+                        id(id + "_sum")
+                        depth(depth)
+                        text(
+                            span {
+                                if (model.key != null) {
+                                    span("\"${model.key}\"") {
+                                        textColor = host.styleProvider.keyColor
+                                    }
+                                    span(" : ") {
+                                        textColor = host.styleProvider.baseColor
+                                    }
+                                }
+                                if (model.index != null) {
+                                    span("${model.index}") {
+                                        textColor = host.styleProvider.secondaryColor
+                                    }
+                                    span(" : ") {
+                                        textColor = host.styleProvider.baseColor
+                                    }
+                                }
+                                span {
+                                    +"[+${model.items.size}]"
+                                    textColor = host.styleProvider.baseColor
+                                }
+                            }.toSafeCharSequence()
+                        )
+                        itemClickListener(View.OnClickListener { host.itemClicked(model) })
+                    }
+                }
+            }
+            is JSonViewerLeaf -> {
+                valueItem {
+                    id(id)
+                    depth(depth)
+                    text(
+                        span {
+                            if (model.key != null) {
+                                span("\"${model.key}\"") {
+                                    textColor = host.styleProvider.keyColor
+                                }
+                                span(" : ") {
+                                    textColor = host.styleProvider.baseColor
+                                }
+                            }
+
+                            if (model.index != null) {
+                                span("${model.index}") {
+                                    textColor = host.styleProvider.secondaryColor
+                                }
+                                span(" : ") {
+                                    textColor = host.styleProvider.baseColor
+                                }
+                            }
+                            append(host.valueToSpan(model))
+                        }.toSafeCharSequence()
+                    )
+                    copyValue(model.stringRes)
+                }
+            }
+        }
+    }
+
+    private fun valueToSpan(leaf: JSonViewerLeaf): Span {
+        val host = this
+        return when (leaf.type) {
+            JSONType.STRING -> {
+                span("\"${leaf.stringRes}\"") {
+                    textColor = host.styleProvider.stringColor
+                }
+            }
+            JSONType.NUMBER -> {
+                span(leaf.stringRes) {
+                    textColor = host.styleProvider.numberColor
+                }
+            }
+            JSONType.BOOLEAN -> {
+                span(leaf.stringRes) {
+                    textColor = host.styleProvider.booleanColor
+                }
+            }
+            JSONType.NULL -> {
+                span("null") {
+                    textColor = host.styleProvider.booleanColor
+                }
+            }
+        }
+    }
+
+    private fun open(
+        id: String,
+        key: String?,
+        index: Int?,
+        depth: Int,
+        isObject: Boolean = true,
+        composed: JSonViewerModel
+    ) {
+        val host = this
+        valueItem {
+            id("${id}_Open")
+            depth(depth)
+            text(
+                span {
+                    if (key != null) {
+                        span("\"$key\"") {
+                            textColor = host.styleProvider.keyColor
+                        }
+                        span(" : ") {
+                            textColor = host.styleProvider.baseColor
+                        }
+                    }
+                    if (index != null) {
+                        span("$index") {
+                            textColor = host.styleProvider.secondaryColor
+                        }
+                        span(" : ") {
+                            textColor = host.styleProvider.baseColor
+                        }
+                    }
+                    span("- ") {
+                        textColor = host.styleProvider.secondaryColor
+                    }
+                    span("{".takeIf { isObject } ?: "[") {
+                        textColor = host.styleProvider.baseColor
+                    }
+                }.toSafeCharSequence()
+            )
+            itemClickListener(View.OnClickListener { host.itemClicked(composed) })
+        }
+
+    }
+
+    private fun itemClicked(model: JSonViewerModel) {
+        model.isExpanded = !model.isExpanded
+        setData(currentData)
+    }
+
+    private fun close(id: String, depth: Int, isObject: Boolean = true) {
+        val host = this
+        valueItem {
+            id("${id}_Close")
+            depth(depth)
+            text(
+                span {
+                    text = "}".takeIf { isObject } ?: "]"
+                    textColor = host.styleProvider.baseColor
+                }.toSafeCharSequence()
+            )
+        }
+    }
+}

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/JSonViewerFragment.kt

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import android.os.Bundle
+import android.os.Parcelable
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.airbnb.epoxy.EpoxyRecyclerView
+import com.airbnb.mvrx.Mavericks
+import com.airbnb.mvrx.MavericksView
+import com.airbnb.mvrx.fragmentViewModel
+import com.airbnb.mvrx.withState
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+internal data class JSonViewerFragmentArgs(
+    val jsonString: String,
+    val defaultOpenDepth: Int,
+    val wrap: Boolean,
+    val styleProvider: JSonViewerStyleProvider?
+) : Parcelable
+
+
+class JSonViewerFragment : Fragment(), MavericksView {
+
+    private val viewModel: JSonViewerViewModel by fragmentViewModel()
+
+    private val epoxyController by lazy {
+        JSonViewerEpoxyController(requireContext())
+    }
+
+    private lateinit var recyclerView: EpoxyRecyclerView
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val args: JSonViewerFragmentArgs? = arguments?.getParcelable(Mavericks.KEY_ARG)
+        val inflate =
+            if (args?.wrap == true) {
+                inflater.inflate(R.layout.fragment_jv_recycler_view_wrap, container, false)
+            } else {
+                inflater.inflate(R.layout.fragment_jv_recycler_view, container, false)
+            }
+        recyclerView = inflate.findViewById(R.id.jvRecyclerView)
+        recyclerView.layoutManager =
+            LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
+        recyclerView.setController(epoxyController)
+        epoxyController.setStyle(args?.styleProvider)
+        registerForContextMenu(recyclerView)
+        return inflate
+    }
+
+    fun showJson(jsonString: String, initialOpenDepth: Int) {
+        viewModel.setJsonSource(jsonString, initialOpenDepth)
+    }
+
+    override fun invalidate() = withState(viewModel) { state ->
+        epoxyController.setData(state)
+    }
+
+    companion object {
+        fun newInstance(
+            jsonString: String,
+            initialOpenDepth: Int = -1,
+            wrap: Boolean = false,
+            styleProvider: JSonViewerStyleProvider? = null
+        ): JSonViewerFragment {
+            return JSonViewerFragment().apply {
+                arguments = Bundle().apply {
+                    putParcelable(
+                        Mavericks.KEY_ARG,
+                        JSonViewerFragmentArgs(
+                            jsonString,
+                            initialOpenDepth,
+                            wrap,
+                            styleProvider
+                        )
+                    )
+                }
+            }
+        }
+    }
+}

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/JSonViewerModel.kt

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import org.json.JSONArray
+import org.json.JSONException
+import org.json.JSONObject
+
+internal open class JSonViewerModel(var key: String?, var index: Int?, val jObject: Any) {
+    var depth = 0
+    var isExpanded = false
+}
+
+internal interface Composed {
+    fun addChild(model: JSonViewerModel)
+}
+
+internal class JSonViewerObject(key: String?, index: Int?, jObject: JSONObject) :
+    JSonViewerModel(key, index, jObject),
+    Composed {
+
+    var keys = LinkedHashMap<String, JSonViewerModel>()
+
+    override fun addChild(model: JSonViewerModel) {
+        keys[model.key!!] = model
+    }
+
+}
+
+internal class JSonViewerArray(key: String?, index: Int?, jObject: JSONArray) :
+    JSonViewerModel(key, index, jObject), Composed {
+    var items = ArrayList<JSonViewerModel>()
+
+    override fun addChild(model: JSonViewerModel) {
+        items.add(model)
+    }
+}
+
+internal class JSonViewerLeaf(key: String?, index: Int?, val stringRes: String, val type: JSONType) :
+    JSonViewerModel(key, index, stringRes)
+
+
+internal enum class JSONType {
+    STRING,
+    NUMBER,
+    BOOLEAN,
+    NULL
+}
+
+internal object ModelParser {
+
+    @Throws(JSONException::class)
+    fun fromJsonString(jsonString: String, initialOpenDepth: Int = -1): JSonViewerObject {
+        val jobj = JSONObject(jsonString.trim())
+        val root = JSonViewerObject(null, null, jobj).apply { isExpanded = true }
+        jobj.keys().forEach {
+            eval(root, it, null, jobj.get(it), 1, initialOpenDepth)
+        }
+        return root
+    }
+
+    private fun eval(parent: Composed, key: String?, index: Int?, obj: Any, depth: Int, initialOpenDepth: Int) {
+        when (obj) {
+            is JSONObject -> {
+                val objectComposed = JSonViewerObject(key, index, obj)
+                    .apply { isExpanded = initialOpenDepth == -1 || depth <= initialOpenDepth }
+                objectComposed.depth = depth
+                obj.keys().forEach {
+                    eval(objectComposed, it, null, obj.get(it), depth + 1, initialOpenDepth)
+                }
+                parent.addChild(objectComposed)
+            }
+            is JSONArray -> {
+                val objectComposed = JSonViewerArray(key, index, obj)
+                    .apply { isExpanded = initialOpenDepth == -1 || depth <= initialOpenDepth }
+                objectComposed.depth = depth
+                for (i in 0 until obj.length()) {
+                    eval(objectComposed, null, i, obj[i], depth + 1, initialOpenDepth)
+                }
+                parent.addChild(objectComposed)
+            }
+            is String -> {
+                JSonViewerLeaf(key, index,  obj, JSONType.STRING).let {
+                    it.depth = depth
+                    parent.addChild(it)
+                }
+            }
+            is Number -> {
+                JSonViewerLeaf(key, index, obj.toString(), JSONType.NUMBER).let {
+                    it.depth = depth
+                    parent.addChild(it)
+                }
+            }
+            is Boolean -> {
+                JSonViewerLeaf(key, index, obj.toString(), JSONType.BOOLEAN).let {
+                    it.depth = depth
+                    parent.addChild(it)
+                }
+            }
+            else -> {
+                if (obj == JSONObject.NULL) {
+                    JSonViewerLeaf(key, index, "null", JSONType.NULL).let {
+                        it.depth = depth
+                        parent.addChild(it)
+                    }
+                }
+            }
+        }
+    }
+}

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/JSonViewerStyleProvider.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import android.content.Context
+import android.os.Parcelable
+import androidx.annotation.ColorInt
+import androidx.core.content.ContextCompat
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+data class JSonViewerStyleProvider(
+    @ColorInt val keyColor: Int,
+    @ColorInt val stringColor: Int,
+    @ColorInt val booleanColor: Int,
+    @ColorInt val numberColor: Int,
+    @ColorInt val baseColor: Int,
+    @ColorInt val secondaryColor: Int
+) : Parcelable {
+
+    companion object {
+        fun default(context: Context) = JSonViewerStyleProvider(
+            keyColor = ContextCompat.getColor(context, R.color.key_color),
+            stringColor = ContextCompat.getColor(context, R.color.string_color),
+            booleanColor = ContextCompat.getColor(context, R.color.bool_color),
+            numberColor = ContextCompat.getColor(context, R.color.number_color),
+            baseColor = ContextCompat.getColor(context, R.color.base_color),
+            secondaryColor = ContextCompat.getColor(context, R.color.secondary_color)
+        )
+    }
+}
+

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/JSonViewerViewModel.kt

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import com.airbnb.mvrx.*
+import kotlinx.coroutines.launch
+
+internal data class JSonViewerState(
+    val root: Async<JSonViewerObject> = Uninitialized
+) : MavericksState
+
+internal class JSonViewerViewModel(initialState: JSonViewerState) :
+    MavericksViewModel<JSonViewerState>(initialState) {
+
+    fun setJsonSource(json: String, initialOpenDepth: Int) {
+        setState {
+            copy(root = Loading())
+        }
+        viewModelScope.launch {
+            try {
+                ModelParser.fromJsonString(json, initialOpenDepth).let {
+                    setState {
+                        copy(
+                            root = Success(it)
+                        )
+                    }
+                }
+            } catch (error: Throwable) {
+                setState {
+                    copy(
+                        root = Fail(error)
+                    )
+                }
+            }
+        }
+    }
+
+    companion object : MavericksViewModelFactory<JSonViewerViewModel, JSonViewerState> {
+
+        @JvmStatic
+        override fun initialState(viewModelContext: ViewModelContext): JSonViewerState? {
+            val arg: JSonViewerFragmentArgs = viewModelContext.args()
+            return try {
+                JSonViewerState(
+                    Success(ModelParser.fromJsonString(arg.jsonString, arg.defaultOpenDepth))
+                )
+            } catch (failure: Throwable) {
+                JSonViewerState(Fail(failure))
+            }
+
+        }
+    }
+}

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/SafeCharSequence.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+/**
+ * Wrapper for a CharSequence, which support mutation of the CharSequence, which can happen during rendering
+ * TODO Mutualize
+ */
+internal class SafeCharSequence(val charSequence: CharSequence) {
+    private val hash = charSequence.toString().hashCode()
+
+    override fun hashCode() = hash
+    override fun equals(other: Any?) = other is SafeCharSequence && other.hash == hash
+}
+
+internal fun CharSequence.toSafeCharSequence() = SafeCharSequence(this)

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/Utils.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import android.content.Context
+import android.util.TypedValue
+
+/**
+ * TODO Mutualize
+ */
+internal object Utils {
+    fun dpToPx(dp: Int, context: Context): Int {
+        return TypedValue.applyDimension(
+            TypedValue.COMPLEX_UNIT_DIP,
+            dp.toFloat(),
+            context.resources.displayMetrics
+        ).toInt()
+    }
+}

library/jsonviewer/src/main/java/org/billcarsonfr/jsonviewer/ValueItem.kt

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.view.ContextMenu
+import android.view.Menu
+import android.view.View
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.airbnb.epoxy.EpoxyAttribute
+import com.airbnb.epoxy.EpoxyHolder
+import com.airbnb.epoxy.EpoxyModelClass
+import com.airbnb.epoxy.EpoxyModelWithHolder
+
+@EpoxyModelClass(layout = R2.layout.item_jv_base_value)
+internal abstract class ValueItem : EpoxyModelWithHolder<ValueItem.Holder>() {
+
+    @EpoxyAttribute
+    var text: SafeCharSequence? = null
+
+    @EpoxyAttribute
+    var depth: Int = 0
+
+    @EpoxyAttribute
+    var copyValue: String? = null
+
+    @EpoxyAttribute(EpoxyAttribute.Option.DoNotHash)
+    var itemClickListener: View.OnClickListener? = null
+
+    override fun bind(holder: Holder) {
+        super.bind(holder)
+        holder.textView.text = text?.charSequence
+        holder.baseView.setPadding(Utils.dpToPx(16 * depth, holder.baseView.context), 0, 0, 0)
+        itemClickListener?.let { holder.baseView.setOnClickListener(it) }
+        holder.copyValue = copyValue
+    }
+
+    override fun unbind(holder: Holder) {
+        super.unbind(holder)
+        holder.baseView.setOnClickListener(null)
+        holder.copyValue = null
+    }
+
+    class Holder : EpoxyHolder(), View.OnCreateContextMenuListener {
+
+        lateinit var textView: TextView
+        lateinit var baseView: LinearLayout
+        var copyValue: String? = null
+
+        override fun bindView(itemView: View) {
+            baseView = itemView.findViewById(R.id.jvBaseLayout)
+            textView = itemView.findViewById(R.id.jvValueText)
+            itemView.setOnCreateContextMenuListener(this)
+        }
+
+        override fun onCreateContextMenu(
+            menu: ContextMenu?,
+            v: View?,
+            menuInfo: ContextMenu.ContextMenuInfo?
+        ) {
+
+            if (copyValue != null) {
+                val menuItem = menu?.add(
+                    Menu.NONE, R.id.copy_value,
+                    Menu.NONE, R.string.copy_value
+                )
+                val clipService =
+                    v?.context?.getSystemService(Context.CLIPBOARD_SERVICE) as? ClipboardManager
+                menuItem?.setOnMenuItemClickListener {
+                    clipService?.setPrimaryClip(ClipData.newPlainText("", copyValue))
+                    true
+                }
+            }
+        }
+    }
+}

library/jsonviewer/src/main/res/layout/fragment_dialog_jv.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/fragmentContainer"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" />

library/jsonviewer/src/main/res/layout/fragment_jv_recycler_view.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fillViewport="true"
+    android:orientation="vertical">
+
+    <com.airbnb.epoxy.EpoxyRecyclerView
+        android:id="@+id/jvRecyclerView"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:fadeScrollbars="false"
+        android:scrollbars="vertical"
+        tools:itemCount="5"
+        tools:listitem="@layout/item_jv_base_value" />
+
+</HorizontalScrollView>

library/jsonviewer/src/main/res/layout/fragment_jv_recycler_view_wrap.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.airbnb.epoxy.EpoxyRecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/jvRecyclerView"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fadeScrollbars="false"
+    android:scrollbars="vertical"
+    tools:itemCount="5"
+    tools:listitem="@layout/item_jv_base_value" />

library/jsonviewer/src/main/res/layout/item_jv_base_value.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:id="@+id/jvBaseLayout"
+    android:background="?attr/selectableItemBackground"
+    tools:paddingLeft="16dp">
+
+    <TextView
+        android:id="@+id/jvValueText"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        tools:text="&quot;Title&quot;: &quot;example glossary&quot;" />
+
+</LinearLayout>

library/jsonviewer/src/main/res/menu/jv_menu_item.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/copy_value"
+        android:title="@string/copy_value" />
+
+</menu>

library/jsonviewer/src/main/res/values/colors.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <color name="key_color">#FF006700</color>
+    <color name="string_color">#FF040091</color>
+    <color name="bool_color">#FF980000</color>
+    <color name="number_color">#FF1700FF</color>
+    <color name="base_color">#FF000000</color>
+    <color name="secondary_color">#FFAAAAAA</color>
+
+</resources>

library/jsonviewer/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="copy_value">Copy Value</string>
+</resources>

library/jsonviewer/src/test/java/org/billcarsonfr/jsonviewer/ModelParseTest.kt

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 org.billcarsonfr.jsonviewer
+
+import org.junit.Assert
+import org.junit.Test
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ModelParseTest {
+    @Test
+    fun parsing_isCorrect() {
+        val string = """
+            {
+                "glossary": {
+                    "title": "example glossary",
+                    "GlossDiv": {
+                        "title": "S",
+                        "GlossList": {
+                            "GlossEntry": {
+                                "ID": "SGML",
+                                "SortAs": "SGML",
+                                "GlossTerm": "Standard Generalized Markup Language",
+                                "Acronym": "SGML",
+                                "Abbrev": "ISO 8879:1986",
+                                "GlossDef": {
+                                    "para": "A meta-markup language, used to create markup languages such as DocBook.",
+                                    "GlossSeeAlso": ["GML", "XML"]
+                                },
+                                "GlossSee": "markup"
+                            }
+                        }
+                    }
+                }
+            }
+    """.trim()
+
+        val model = ModelParser.fromJsonString(string)
+
+        Assert.assertEquals(0, model.depth)
+        Assert.assertEquals(1, model.keys.size)
+        Assert.assertTrue(model.keys.containsKey("glossary"))
+        Assert.assertTrue(model.keys["glossary"] is JSonViewerObject)
+
+        val glossary = model.keys["glossary"] as JSonViewerObject
+        Assert.assertEquals(2, glossary.keys.size)
+        Assert.assertTrue(glossary.keys.containsKey("title"))
+        Assert.assertTrue(glossary.keys.containsKey("GlossDiv"))
+
+        Assert.assertTrue(glossary.keys["title"] is JSonViewerLeaf)
+        (glossary.keys["title"] as JSonViewerLeaf).let {
+            Assert.assertEquals(JSONType.STRING, it.type)
+        }
+
+
+        Assert.assertTrue(glossary.keys["GlossDiv"] is JSonViewerObject)
+        val glossDiv = glossary.keys["GlossDiv"] as JSonViewerObject
+
+
+        Assert.assertTrue(glossDiv.keys["GlossList"] is JSonViewerObject)
+        val glossList = glossDiv.keys["GlossList"] as JSonViewerObject
+
+
+        Assert.assertTrue(glossList.keys["GlossEntry"] is JSonViewerObject)
+        val glossEntry = glossList.keys["GlossEntry"] as JSonViewerObject
+
+        Assert.assertTrue(glossEntry.keys["GlossDef"] is JSonViewerObject)
+        val glossDef = glossEntry.keys["GlossDef"] as JSonViewerObject
+
+
+        Assert.assertTrue(glossDef.keys["GlossSeeAlso"] is JSonViewerArray)
+        val glossSeeAlso = glossDef.keys["GlossSeeAlso"] as JSonViewerArray
+
+        Assert.assertEquals(2, glossSeeAlso.items.size)
+        Assert.assertEquals("0", glossSeeAlso.items.first().key)
+        Assert.assertEquals("GML", (glossSeeAlso.items.first() as JSonViewerLeaf).stringRes)
+
+    }
+}

settings.gradle

@@ -5,4 +5,5 @@ include ':diff-match-patch'
 include ':attachment-viewer'
 include ':multipicker'
 include ':library:ui-styles'
+include ':library:jsonviewer'
 include ':matrix-sdk-android-flow'

vector/build.gradle

@@ -326,6 +326,7 @@ dependencies {
     implementation project(":diff-match-patch")
     implementation project(":multipicker")
     implementation project(":attachment-viewer")
+    implementation project(":library:jsonviewer")
     implementation project(":library:ui-styles")
     implementation 'androidx.multidex:multidex:2.0.1'
 
@@ -458,7 +459,6 @@ dependencies {
     gplayImplementation 'com.google.android.gms:play-services-oss-licenses:17.0.0'
 
     implementation "androidx.emoji2:emoji2:1.0.1"
-    implementation('com.github.BillCarsonFr:JsonViewer:0.7')
 
     // WebRTC
     // org.webrtc:google-webrtc is for development purposes only