feat: Add copy button to public/private key fields (#1782)

app/src/main/java/com/geeksville/mesh/ui/components/CopyIconButton.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2025 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.geeksville.mesh.ui.components
+
+import android.content.ClipData
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.twotone.ContentCopy
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.ClipEntry
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.res.stringResource
+import com.geeksville.mesh.R
+
+@Composable
+fun CopyIconButton(
+    valueToCopy: String,
+    modifier: Modifier = Modifier,
+    label: String = stringResource(id = R.string.copy),
+) {
+    val clipboardManager = LocalClipboardManager.current
+    IconButton(
+        modifier = modifier,
+        onClick = {
+            val clipData = ClipData.newPlainText(label, valueToCopy)
+            val clipEntry = ClipEntry(clipData)
+            clipboardManager.setClip(clipEntry)
+        }
+    ) {
+        Icon(
+            imageVector = Icons.TwoTone.ContentCopy,
+            contentDescription = label
+        )
+    }
+}

app/src/main/java/com/geeksville/mesh/ui/components/EditBase64Preference.kt

@@ -17,7 +17,6 @@
 
 package com.geeksville.mesh.ui.components
 
-import android.util.Base64
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.text.KeyboardActions
@@ -47,22 +46,23 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import com.geeksville.mesh.R
 import com.geeksville.mesh.model.Channel
+import com.geeksville.mesh.util.encodeToString
+import com.geeksville.mesh.util.toByteString
 import com.google.protobuf.ByteString
-import com.google.protobuf.kotlin.toByteString
 
+@Suppress("LongMethod")
 @Composable
 fun EditBase64Preference(
+    modifier: Modifier = Modifier,
     title: String,
     value: ByteString,
     enabled: Boolean,
+    readOnly: Boolean = false,
     keyboardActions: KeyboardActions,
     onValueChange: (ByteString) -> Unit,
-    modifier: Modifier = Modifier,
     onGenerateKey: (() -> Unit)? = null,
     trailingIcon: (@Composable () -> Unit)? = null,
 ) {
-    fun ByteString.encodeToString() = Base64.encodeToString(this.toByteArray(), Base64.NO_WRAP)
-    fun String.toByteString() = Base64.decode(this, Base64.NO_WRAP).toByteString()
 
     var valueState by remember { mutableStateOf(value.encodeToString()) }
     val isError = value.encodeToString() != valueState
@@ -91,6 +91,7 @@ fun EditBase64Preference(
             .fillMaxWidth()
             .onFocusChanged { focusState -> isFocused = focusState.isFocused },
         enabled = enabled,
+        readOnly = readOnly,
         label = { Text(text = title) },
         isError = isError,
         keyboardOptions = KeyboardOptions.Default.copy(
@@ -98,9 +99,7 @@ fun EditBase64Preference(
         ),
         keyboardActions = keyboardActions,
         trailingIcon = {
-            if (trailingIcon != null) {
-                trailingIcon()
-            } else if (icon != null) {
+            if (icon != null) {
                 IconButton(
                     onClick = {
                         if (isError) {
@@ -122,6 +121,8 @@ fun EditBase64Preference(
                         }
                     )
                 }
+            } else if (trailingIcon != null) {
+                trailingIcon()
             }
         },
     )

app/src/main/java/com/geeksville/mesh/ui/radioconfig/components/SecurityConfigItemList.kt

@@ -34,12 +34,14 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.geeksville.mesh.ConfigProtos.Config.SecurityConfig
 import com.geeksville.mesh.config
 import com.geeksville.mesh.copy
+import com.geeksville.mesh.ui.components.CopyIconButton
 import com.geeksville.mesh.ui.components.EditBase64Preference
 import com.geeksville.mesh.ui.components.EditListPreference
 import com.geeksville.mesh.ui.components.PreferenceCategory
 import com.geeksville.mesh.ui.components.PreferenceFooter
 import com.geeksville.mesh.ui.components.SwitchPreference
 import com.geeksville.mesh.ui.radioconfig.RadioConfigViewModel
+import com.geeksville.mesh.util.encodeToString
 
 @Composable
 fun SecurityConfigScreen(
@@ -83,13 +85,19 @@ fun SecurityConfigItemList(
             EditBase64Preference(
                 title = "Public Key",
                 value = securityInput.publicKey,
-                enabled = false,
+                enabled = enabled,
+                readOnly = true,
                 keyboardActions = KeyboardActions(onDone = { focusManager.clearFocus() }),
                 onValueChange = {
                     if (it.size() == 32) {
                         securityInput = securityInput.copy { publicKey = it }
                     }
                 },
+                trailingIcon = {
+                    CopyIconButton(
+                        valueToCopy = securityInput.privateKey.encodeToString(),
+                    )
+                }
             )
         }
 
@@ -104,6 +112,11 @@ fun SecurityConfigItemList(
                         securityInput = securityInput.copy { privateKey = it }
                     }
                 },
+                trailingIcon = {
+                    CopyIconButton(
+                        valueToCopy = securityInput.privateKey.encodeToString(),
+                    )
+                }
             )
         }
 

app/src/main/java/com/geeksville/mesh/util/ByteStringExtensions.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2025 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.geeksville.mesh.util
+
+import android.util.Base64
+import com.google.protobuf.ByteString
+import com.google.protobuf.kotlin.toByteString
+
+fun ByteString.encodeToString() = Base64.encodeToString(this.toByteArray(), Base64.NO_WRAP)
+fun String.toByteString() = Base64.decode(this, Base64.NO_WRAP).toByteString()