make custom font setting work

app/src/main/java/helium314/keyboard/settings/SettingsActivity.kt

@@ -17,7 +17,6 @@ import kotlinx.coroutines.flow.MutableStateFlow
 //  make all prefs actually work
 //   appearance
 //    click on bg image does nothing when already set (but works after reload)
-//    custom font loading not implemented
 //    have large bg image, and first-time load the keyboard on new search field -> bg image expands full size
 //   advanced
 //   preferences
@@ -27,6 +26,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
 //  more similar dialog style args (for all dialogs, or for none)
 //  check whether dialogs have the same colors, i think currently it's a bit inconsistent
 //   see all the properties for each alertDialog -> any way to set it in a single place?
+//  yes/no/default can now be confirmDialog
 //  title too huge for bg image and text on spacebar dialogs, also maybe somewhere else -> where to set in one place?
 //  check dark and light theme (don't have dynamic)
 //  rename both settingsActivities

app/src/main/java/helium314/keyboard/settings/dialogs/ConfirmationDialog.kt

@@ -26,23 +26,26 @@ fun ConfirmationDialog(
     text: @Composable (() -> Unit)? = null,
     confirmButtonText: String = stringResource(android.R.string.ok),
     cancelButtonText: String = stringResource(android.R.string.cancel),
+    neutralButtonText: String? = null,
+    onNeutral: () -> Unit = { },
     shape: Shape = MaterialTheme.shapes.medium,
     backgroundColor: Color = MaterialTheme.colorScheme.surface,
     contentColor: Color = contentColorFor(backgroundColor),
     properties: DialogProperties = DialogProperties(),
 ) {
-    AlertDialog(
+    ThreeButtonAlertDialog(
         onDismissRequest = onDismissRequest,
-        confirmButton = {
-            TextButton(onClick = { onConfirmed(); onDismissRequest() }) { Text(confirmButtonText) }
-        },
+        onConfirmed = onConfirmed,
+        confirmButtonText = confirmButtonText,
+        cancelButtonText = cancelButtonText,
+        neutralButtonText = neutralButtonText,
+        onNeutral = onNeutral,
         modifier = modifier,
-        dismissButton = { TextButton(onClick = onDismissRequest) { Text(cancelButtonText) } },
         title = title,
         text = text,
         shape = shape,
-        containerColor = backgroundColor,
-        textContentColor = contentColor,
+        backgroundColor = backgroundColor,
+        contentColor = contentColor,
         properties = properties,
     )
 }
@@ -53,6 +56,7 @@ private fun PreviewConfirmDialog() {
     ConfirmationDialog(
         onDismissRequest = {  },
         onConfirmed = {},
+        neutralButtonText = "hi",
         confirmButtonText = "I don't care",
         text = { Text(stringResource(R.string.disable_personalized_dicts_message)) }
     )

app/src/main/java/helium314/keyboard/settings/dialogs/InfoDialog.kt

@@ -0,0 +1,17 @@
+package helium314.keyboard.settings.dialogs
+
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+
+@Composable
+fun InfoDialog(
+    message: String,
+    onDismissRequest: () -> Unit
+) {
+    ThreeButtonAlertDialog(
+        onDismissRequest = onDismissRequest,
+        text = { Text(message) },
+        onConfirmed = { },
+        confirmButtonText = null
+    )
+}

app/src/main/java/helium314/keyboard/settings/dialogs/ThreeButtonAlertDialog.kt

@@ -23,7 +23,7 @@ fun ThreeButtonAlertDialog(
     text: @Composable (() -> Unit)? = null,
     onNeutral: () -> Unit = { },
     checkOk: () -> Boolean = { true },
-    confirmButtonText: String = stringResource(android.R.string.ok),
+    confirmButtonText: String? = stringResource(android.R.string.ok),
     cancelButtonText: String = stringResource(android.R.string.cancel),
     neutralButtonText: String? = null,
     shape: Shape = MaterialTheme.shapes.medium,
@@ -41,6 +41,7 @@ fun ThreeButtonAlertDialog(
                     ) { Text(neutralButtonText) }
                 Spacer(modifier.weight(1f))
                 TextButton(onClick = onDismissRequest) { Text(cancelButtonText) }
+                if (confirmButtonText != null)
                     TextButton(
                         enabled = checkOk(),
                         onClick = { onDismissRequest(); onConfirmed() },

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

@@ -5,6 +5,7 @@ import android.app.Activity
 import android.content.Context
 import android.content.Intent
 import android.graphics.BitmapFactory
+import android.graphics.Typeface
 import android.net.Uri
 import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult
@@ -31,9 +32,11 @@ import helium314.keyboard.latin.settings.ColorsNightSettingsFragment
 import helium314.keyboard.latin.settings.ColorsSettingsFragment
 import helium314.keyboard.latin.settings.Settings
 import helium314.keyboard.latin.settings.SettingsValues
+import helium314.keyboard.latin.utils.DeviceProtectedUtils
 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
@@ -47,11 +50,14 @@ import helium314.keyboard.settings.SettingsActivity2
 import helium314.keyboard.settings.SliderPreference
 import helium314.keyboard.settings.SwitchPreference
 import helium314.keyboard.settings.Theme
+import helium314.keyboard.settings.dialogs.ConfirmationDialog
 import helium314.keyboard.settings.dialogs.CustomizeIconsDialog
+import helium314.keyboard.settings.dialogs.InfoDialog
 import helium314.keyboard.settings.dialogs.TextInputDialog
 import helium314.keyboard.settings.keyboardNeedsReload
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import java.io.File
 
 @Composable
 fun AppearanceScreen(
@@ -338,11 +344,52 @@ fun createAppearancePrefs(context: Context) = listOf(
         }
     },
     PrefDef(context, NonSettingsPrefs.CUSTOM_FONT, R.string.custom_font) { def ->
+        val ctx = LocalContext.current
         var showDialog by remember { mutableStateOf(false) }
+        var showErrorDialog by remember { mutableStateOf(false) }
+        val fontFile = Settings.getCustomFontFile(ctx)
+        val launcher = rememberLauncherForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+            if (it.resultCode != Activity.RESULT_OK) return@rememberLauncherForActivityResult
+            val uri = it.data?.data ?: return@rememberLauncherForActivityResult
+            val tempFile = File(DeviceProtectedUtils.getFilesDir(context), "temp_file")
+            FileUtils.copyContentUriToNewFile(uri, ctx, tempFile)
+            try {
+                val typeface = Typeface.createFromFile(tempFile)
+                fontFile.delete()
+                tempFile.renameTo(fontFile)
+                Settings.clearCachedTypeface()
+                keyboardNeedsReload = true
+            } catch (_: Exception) {
+                showErrorDialog = true
+                tempFile.delete()
+            }
+        }
+        val intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
+            .addCategory(Intent.CATEGORY_OPENABLE)
+            .setType("*/*")
         Preference(
             name = def.title,
-            onClick = { showDialog = true },
-        ) // todo: create and show the dialog
+            onClick = {
+                if (fontFile.exists())
+                    showDialog = true
+                else launcher.launch(intent)
+            },
+        )
+        if (showDialog)
+            ConfirmationDialog(
+                onDismissRequest = { showDialog = false },
+                onConfirmed = { launcher.launch(intent) },
+                onNeutral = {
+                    fontFile.delete()
+                    Settings.clearCachedTypeface()
+                    keyboardNeedsReload = true
+                },
+                neutralButtonText = stringResource(R.string.delete),
+                confirmButtonText = stringResource(R.string.load),
+                title = { Text(stringResource(R.string.custom_font)) }
+            )
+        if (showErrorDialog)
+            InfoDialog(stringResource(R.string.file_read_error)) { showErrorDialog = false }
     },
 )