Note widget: add export functionality

app/ui/src/main/java/de/mm20/launcher2/ui/launcher/widgets/notes/NotesWidget.kt

@@ -1,40 +1,111 @@
 package de.mm20.launcher2.ui.launcher.widgets.notes
 
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.material.icons.Icons
-import androidx.compose.material3.LocalContentColor
+import androidx.compose.material.icons.rounded.Add
-import androidx.compose.material3.MaterialTheme
+import androidx.compose.material.icons.rounded.Delete
+import androidx.compose.material.icons.rounded.MoreVert
+import androidx.compose.material.icons.rounded.SaveAlt
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.SolidColor
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import de.mm20.launcher2.ui.R
 import de.mm20.launcher2.ui.component.markdown.MarkdownEditor
 import de.mm20.launcher2.widgets.NotesWidget
+import java.time.ZonedDateTime
+import java.time.format.DateTimeFormatter
 
 @Composable
 fun NotesWidget(widget: NotesWidget) {
-    val viewModel: NotesWidgetVM = viewModel(key = "notes-widget-${widget.id}", factory = NotesWidgetVM.Factory)
+    val context = LocalContext.current
+    val viewModel: NotesWidgetVM =
+        viewModel(key = "notes-widget-${widget.id}", factory = NotesWidgetVM.Factory)
 
     LaunchedEffect(widget) {
         viewModel.updateWidget(widget)
     }
 
-    val text by viewModel.noteText
+    val exportLauncher = rememberLauncherForActivityResult(
-
+        contract = ActivityResultContracts.CreateDocument("text/markdown"),
-    MarkdownEditor(
+        onResult = {
-        value = text,
+            if (it != null) viewModel.exportNote(context, it)
-        onValueChange = { viewModel.setText(it) },
-        modifier = Modifier.fillMaxWidth().padding(16.dp),
-        placeholder = {
-            Text(stringResource(R.string.notes_widget_placeholder))
         }
     )
+
+    val text by viewModel.noteText
+    Column {
+        MarkdownEditor(
+            value = text,
+            onValueChange = { viewModel.setText(it) },
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            placeholder = {
+                Text(stringResource(R.string.notes_widget_placeholder))
+            }
+        )
+
+        AnimatedVisibility(text.isNotBlank()) {
+            var showMenu by remember { mutableStateOf(false) }
+            Box(modifier = Modifier.fillMaxWidth(), contentAlignment = Alignment.CenterEnd) {
+                Box {
+                    IconButton(onClick = { showMenu = true }) {
+                        Icon(Icons.Rounded.MoreVert, null)
+                    }
+                    DropdownMenu(expanded = showMenu, onDismissRequest = { showMenu = false }) {
+                        DropdownMenuItem(
+                            text = { Text("New note") },
+                            leadingIcon = {
+                                Icon(Icons.Rounded.Add, null)
+                            },
+                            onClick = { /*TODO*/ },
+                        )
+                        DropdownMenuItem(
+                            text = { Text(stringResource(R.string.notes_widget_action_save)) },
+                            leadingIcon = {
+                                Icon(Icons.Rounded.SaveAlt, null)
+                            },
+                            onClick = {
+                                val fileName = context.getString(
+                                    R.string.notes_widget_export_filename,
+                                    ZonedDateTime.now().format(
+                                        DateTimeFormatter.ISO_INSTANT
+                                    )
+                                )
+                                exportLauncher.launch("$fileName.md")
+                                showMenu = false
+                            },
+                        )
+                        DropdownMenuItem(
+                            text = { Text("Dismiss") },
+                            leadingIcon = {
+                                Icon(Icons.Rounded.Delete, null)
+                            },
+                            onClick = { /*TODO*/ },
+                        )
+                    }
+                }
+            }
+        }
+    }
 }

app/ui/src/main/java/de/mm20/launcher2/ui/launcher/widgets/notes/NotesWidgetVM.kt

@@ -1,5 +1,7 @@
 package de.mm20.launcher2.ui.launcher.widgets.notes
 
+import android.content.Context
+import android.net.Uri
 import android.util.Log
 import androidx.compose.runtime.mutableStateOf
 import androidx.lifecycle.ViewModel
@@ -8,14 +10,11 @@ import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
 import de.mm20.launcher2.services.widgets.WidgetsService
 import de.mm20.launcher2.widgets.NotesWidget
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.launch
-import org.intellij.markdown.ast.ASTNode
-import org.intellij.markdown.ast.getTextInNode
-import org.intellij.markdown.flavours.commonmark.CommonMarkFlavourDescriptor
-import org.intellij.markdown.parser.MarkdownParser
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.get
 
@@ -43,6 +42,17 @@ class NotesWidgetVM(
         }
     }
 
+    fun exportNote(context: Context, uri: Uri) {
+        viewModelScope.launch(Dispatchers.IO) {
+            val text = noteText.value
+            Log.d("MM20", text)
+            val outputStream = context.contentResolver.openOutputStream(uri)
+            outputStream?.use {
+                it.write(text.toByteArray())
+            }
+        }
+    }
+
     companion object: KoinComponent {
         val Factory = viewModelFactory {
             initializer {

core/i18n/src/main/res/values/strings.xml

@@ -225,6 +225,13 @@
     <!-- Add a third party widget (=a standard Android app widget) -->
     <string name="widget_add_external">More</string>
     <string name="notes_widget_placeholder">Write a note…</string>
+    <string name="notes_widget_action_new">New note</string>
+    <!-- Save / export the current note content as markdown file -->
+    <string name="notes_widget_action_save">Save</string>
+    <!-- Default filename for exported files. %1$s: the current date and time. File extension is appended automatically. -->
+    <string name="notes_widget_export_filename">Note_%1$s</string>
+    <string name="notes_widget_action_dismiss">Dismiss</string>
+    <string name="notes_widget_dismissed">Note dismissed.</string>
     <!-- Indicates to which app a shortcuts belongs. %1$s: the name of the app -->
     <string name="shortcut_summary">By %1$s</string>
     <!-- Progress of the installation of another app. %1$s: the formatted percentage of the installation progress -->