unfinished state of load background image pref (should be a bit simplified)

app/src/main/java/helium314/keyboard/settings/screens/AppearanceScreen.kt

@@ -1,20 +1,32 @@
 // SPDX-License-Identifier: GPL-3.0-only
 package helium314.keyboard.settings.screens
 
+import android.app.Activity
 import android.content.Context
+import android.content.Intent
+import android.graphics.BitmapFactory
+import android.net.Uri
 import android.os.Build
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
+import helium314.keyboard.keyboard.KeyboardSwitcher
 import helium314.keyboard.keyboard.KeyboardTheme
 import helium314.keyboard.latin.R
+import helium314.keyboard.latin.common.FileUtils
 import helium314.keyboard.latin.settings.ColorsNightSettingsFragment
 import helium314.keyboard.latin.settings.ColorsSettingsFragment
 import helium314.keyboard.latin.settings.Settings
@@ -22,6 +34,7 @@ import helium314.keyboard.latin.settings.SettingsValues
 import helium314.keyboard.latin.utils.Log
 import helium314.keyboard.latin.utils.getActivity
 import helium314.keyboard.latin.utils.getStringResourceOrName
+import helium314.keyboard.latin.utils.infoDialog
 import helium314.keyboard.latin.utils.prefs
 import helium314.keyboard.latin.utils.switchTo
 import helium314.keyboard.settings.AllPrefs
@@ -36,6 +49,9 @@ import helium314.keyboard.settings.SliderPreference
 import helium314.keyboard.settings.SwitchPreference
 import helium314.keyboard.settings.Theme
 import helium314.keyboard.settings.dialogs.CustomizeIconsDialog
+import helium314.keyboard.settings.keyboardNeedsReload
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 @Composable
 fun AppearanceScreen(
@@ -177,11 +193,69 @@ fun createAppearancePrefs(context: Context) = listOf(
         SwitchPreference(def, Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
     },
     PrefDef(context, NonSettingsPrefs.BACKGROUND_IMAGE, R.string.customize_background_image) { def ->
-        var showDialog by remember { mutableStateOf(false) }
+        var showDayNightDialog by remember { mutableStateOf(false) }
+        var showSelectionDialog by remember { mutableStateOf(false) }
+        var showErrorDialog by remember { mutableStateOf(false) }
+        var isNight by remember { mutableStateOf(false) }
+        val ctx = LocalContext.current
+        val dayNightPref = Settings.readDayNightPref(ctx.prefs(), ctx.resources)
+        val scope = rememberCoroutineScope()
+        val launcher = rememberLauncherForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+            if (result.resultCode != Activity.RESULT_OK) return@rememberLauncherForActivityResult
+            val uri = result.data?.data ?: return@rememberLauncherForActivityResult
+            showSelectionDialog = false
+            showDayNightDialog = false
+            scope.launch(Dispatchers.IO) {
+                if (!setBackgroundImage(ctx, uri, isNight, false))
+                    showErrorDialog = true
+            }
+        }
+        val intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
+            .addCategory(Intent.CATEGORY_OPENABLE)
+            .setType("image/*")
         Preference(
             name = def.title,
-            onClick = { showDialog = true }
+            onClick = {
-        ) // todo: create and show the dialog
+                if (dayNightPref) {
+                    showDayNightDialog = true
+                } else if (!Settings.getCustomBackgroundFile(ctx, false, false).exists()) {
+                    launcher.launch(intent)
+                } else {
+                    showSelectionDialog = true
+                }
+            }
+        )
+        if (showDayNightDialog) {
+            // dialog to set isNight and then show other dialog if image exists
+            AlertDialog(
+                onDismissRequest = { showDayNightDialog = false },
+                confirmButton = {
+                    TextButton(onClick = {
+                        showDayNightDialog = false
+                        isNight = false
+                        if (Settings.getCustomBackgroundFile(ctx, isNight, false).exists())
+                            showSelectionDialog = true
+                        else launcher.launch(intent)
+                    }) { Text(stringResource(R.string.day_or_night_day)) }
+                },
+                dismissButton = {
+                    TextButton(onClick = {
+                        showDayNightDialog = false
+                        isNight = true
+                        if (Settings.getCustomBackgroundFile(ctx, isNight, false).exists())
+                            showSelectionDialog = true
+                        else launcher.launch(intent)
+                    }) { Text(stringResource(R.string.day_or_night_night)) }
+                },
+                title = { Text(stringResource(R.string.day_or_night_image)) },
+            )
+        }
+        if (showSelectionDialog) {
+            // todo: delete file or start launcher
+        }
+        if (showErrorDialog) {
+            // todo: infoDialog(requireContext(), R.string.file_read_error)
+        }
     },
     PrefDef(context, NonSettingsPrefs.BACKGROUND_IMAGE_LANDSCAPE, R.string.customize_background_image_landscape, R.string.summary_customize_background_image_landscape) { def ->
         var showDialog by remember { mutableStateOf(false) }
@@ -242,6 +316,20 @@ fun createAppearancePrefs(context: Context) = listOf(
     },
 )
 
+private fun setBackgroundImage(ctx: Context, uri: Uri, isNight: Boolean, isLandscape: Boolean): Boolean {
+    val imageFile = Settings.getCustomBackgroundFile(ctx, isNight, false)
+    FileUtils.copyContentUriToNewFile(uri, ctx, imageFile)
+    keyboardNeedsReload = true
+    try {
+        BitmapFactory.decodeFile(imageFile.absolutePath)
+    } catch (_: Exception) {
+        imageFile.delete()
+        return false
+    }
+    Settings.clearCachedBackgroundImages()
+    return true
+}
+
 @Preview
 @Composable
 private fun Preview() {