Mark copied secret custom fields as sensitive

app/src/main/java/com/hegocre/nextcloudpasswords/data/password/CustomField.kt

@@ -15,6 +15,14 @@ data class CustomField(
     val type: String,
     val value: String
 ) {
+    /**
+     * Whether this field holds a secret value. Secret fields are masked in the UI and
+     * should be marked as sensitive when copied, so the system keeps them out of the
+     * clipboard preview and history (Android 13+), just like the account password.
+     */
+    val isSensitive: Boolean
+        get() = type == TYPE_SECRET
+
     companion object {
         const val TYPE_TEXT = "text"
         const val TYPE_SECRET = "secret"

app/src/main/java/com/hegocre/nextcloudpasswords/ui/components/PasswordItem.kt

@@ -347,7 +347,7 @@ fun PasswordItemContent(
                                 },
                                 trailingIcon = {
                                     IconButton(onClick = {
-                                        context.copyToClipboard(customField.value)
+                                        context.copyToClipboard(customField.value, isSensitive = customField.isSensitive)
                                         Toast.makeText(
                                             context,
                                             String.format(copiedText, customField.label),
@@ -378,7 +378,7 @@ fun PasswordItemContent(
                                 },
                                 trailingIcon = {
                                     IconButton(onClick = {
-                                        context.copyToClipboard(customField.value)
+                                        context.copyToClipboard(customField.value, isSensitive = customField.isSensitive)
                                         Toast.makeText(
                                             context,
                                             String.format(copiedText, customField.label),
@@ -409,7 +409,7 @@ fun PasswordItemContent(
                                 },
                                 trailingIcon = {
                                     IconButton(onClick = {
-                                        context.copyToClipboard(customField.value)
+                                        context.copyToClipboard(customField.value, isSensitive = customField.isSensitive)
                                         Toast.makeText(
                                             context,
                                             String.format(copiedText, customField.label),

app/src/test/java/com/hegocre/nextcloudpasswords/data/password/CustomFieldTest.kt

@@ -0,0 +1,32 @@
+package com.hegocre.nextcloudpasswords.data.password
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * Unit test for [CustomField.isSensitive], which decides whether a custom field value
+ * must be flagged as sensitive when copied to the clipboard.
+ */
+class CustomFieldTest {
+    private fun field(type: String) = CustomField(label = "label", type = type, value = "value")
+
+    @Test
+    fun secretFieldIsSensitive() {
+        assertTrue(field(CustomField.TYPE_SECRET).isSensitive)
+    }
+
+    @Test
+    fun nonSecretFieldsAreNotSensitive() {
+        assertFalse(field(CustomField.TYPE_TEXT).isSensitive)
+        assertFalse(field(CustomField.TYPE_EMAIL).isSensitive)
+        assertFalse(field(CustomField.TYPE_URL).isSensitive)
+        assertFalse(field(CustomField.TYPE_FILE).isSensitive)
+        assertFalse(field(CustomField.TYPE_DATA).isSensitive)
+    }
+
+    @Test
+    fun unknownTypeIsNotSensitive() {
+        assertFalse(field("something-else").isSensitive)
+    }
+}