rewrite SelectFolderDialog to kotlin

Author: tibbi

app/src/main/java/com/simplemobiletools/filemanager/dialogs/SelectFolderDialog.java

@@ -0,0 +1,126 @@
+package com.simplemobiletools.filemanager.dialogs
+
+import android.app.Activity
+import android.app.Dialog
+import android.content.Intent
+import android.os.Bundle
+import android.support.v4.app.DialogFragment
+import android.support.v7.app.AlertDialog
+import android.view.View
+import com.simplemobiletools.filemanager.Config
+import com.simplemobiletools.filemanager.R
+import com.simplemobiletools.filemanager.Utils
+import com.simplemobiletools.filemanager.adapters.ItemsAdapter
+import com.simplemobiletools.filemanager.fragments.ItemsFragment
+import com.simplemobiletools.filemanager.models.FileDirItem
+import kotlinx.android.synthetic.main.directory_picker.view.*
+import java.io.File
+import java.util.*
+import kotlin.comparisons.compareBy
+
+class SelectFolderDialog : DialogFragment() {
+    companion object {
+        lateinit var mPath: String
+        var mFirstUpdate: Boolean = true
+
+        fun newInstance(path: String): SelectFolderDialog {
+            mPath = path
+            mFirstUpdate = true
+            return SelectFolderDialog()
+        }
+    }
+
+    lateinit var dialog: View
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        dialog = activity.layoutInflater.inflate(R.layout.directory_picker, null)
+
+        updateItems()
+        setupBreadcrumbs()
+
+        return AlertDialog.Builder(activity)
+                .setTitle(resources.getString(R.string.select_destination))
+                .setView(dialog)
+                .setPositiveButton(R.string.ok) { dialog, which -> sendResult() }
+                .setNegativeButton(R.string.cancel, null)
+                .create()
+    }
+
+    private fun updateItems() {
+        var items = getItems(mPath)
+        if (!containsDirectory(items) && !mFirstUpdate) {
+            sendResult()
+            return
+        }
+
+        items = items.sortedWith(compareBy({ !it.isDirectory }, { it.name.toLowerCase() }))
+
+        val adapter = ItemsAdapter(context, items)
+        dialog.directory_picker_list.adapter = adapter
+        dialog.directory_picker_breadcrumbs.setInitialBreadcrumb(mPath)
+        dialog.directory_picker_list.setOnItemClickListener { adapterView, view, position, id ->
+            val item = items[position]
+            if (item.isDirectory) {
+                mPath = item.path
+                updateItems()
+            }
+        }
+
+        mFirstUpdate = false
+    }
+
+    private fun sendResult() {
+        val intent = Intent()
+        intent.putExtra(ItemsFragment.SELECT_FOLDER_PATH, mPath)
+        targetFragment.onActivityResult(ItemsFragment.SELECT_FOLDER_REQUEST, Activity.RESULT_OK, intent)
+        dismiss()
+    }
+
+    private fun setupBreadcrumbs() {
+        dialog.directory_picker_breadcrumbs.setListener { id ->
+            val item = dialog.directory_picker_breadcrumbs.getChildAt(id).tag as FileDirItem
+            mPath = item.path
+            updateItems()
+        }
+    }
+
+    private fun getItems(path: String): List<FileDirItem> {
+        val showHidden = Config.newInstance(context).showHidden
+        val items = ArrayList<FileDirItem>()
+        val base = File(path)
+        val files = base.listFiles()
+        if (files != null) {
+            for (file in files) {
+                if (!file.isDirectory)
+                    continue
+
+                if (!showHidden && file.isHidden)
+                    continue
+
+                val curPath = file.absolutePath
+                val curName = Utils.getFilename(curPath)
+                val children = getChildren(file)
+                val size = file.length()
+
+                items.add(FileDirItem(curPath, curName, file.isDirectory, children, size))
+            }
+        }
+        return items
+    }
+
+    private fun getChildren(file: File): Int {
+        if (file.listFiles() == null || !file.isDirectory)
+            return 0
+
+        return file.listFiles().size
+    }
+
+    private fun containsDirectory(items: List<FileDirItem>): Boolean {
+        for (item in items) {
+            if (item.isDirectory) {
+                return true
+            }
+        }
+        return false
+    }
+}

app/src/main/java/com/simplemobiletools/filemanager/dialogs/SelectFolderDialog.kt

@@ -543,7 +543,7 @@ private void notifyDeletion(int cnt) {
     private View.OnClickListener destinationPicker = new View.OnClickListener() {
         @Override
         public void onClick(final View view) {
-            SelectFolderDialog dialog = SelectFolderDialog.newInstance(mCopyDestinationPath);
+            SelectFolderDialog dialog = SelectFolderDialog.Companion.newInstance(mCopyDestinationPath);
             dialog.setTargetFragment(ItemsFragment.this, SELECT_FOLDER_REQUEST);
             dialog.show(getFragmentManager(), "selectFolder");
         }