131 lines
4.5 KiB
Kotlin
131 lines
4.5 KiB
Kotlin
package sushi.hardcore.droidfs.file_viewers
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import android.annotation.SuppressLint
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import android.text.Editable
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import android.text.TextWatcher
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import android.view.Menu
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import android.view.MenuItem
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import android.widget.EditText
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import android.widget.Toast
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import androidx.activity.addCallback
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import sushi.hardcore.droidfs.R
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import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
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import java.io.File
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class TextEditor: FileViewerActivity() {
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private lateinit var fileName: String
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private lateinit var editor: EditText
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private var changedSinceLastSave = false
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private var wordWrap = true
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override fun getFileType(): String {
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return "text"
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}
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override fun viewFile() {
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fileName = File(filePath).name
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title = fileName
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supportActionBar?.setDisplayHomeAsUpEnabled(true)
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loadWholeFile(filePath) {
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try {
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loadLayout(String(it))
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onBackPressedDispatcher.addCallback(this) {
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checkSaveAndExit()
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}
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} catch (e: OutOfMemoryError){
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CustomAlertDialogBuilder(this, theme)
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.setTitle(R.string.error)
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.setMessage(R.string.outofmemoryerror_msg)
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.setCancelable(false)
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.setPositiveButton(R.string.ok) { _, _ -> goBackToExplorer()}
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.show()
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}
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}
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}
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private fun loadLayout(fileContent: String){
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if (wordWrap){
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setContentView(R.layout.activity_text_editor_wrap)
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} else {
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setContentView(R.layout.activity_text_editor)
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}
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editor = findViewById(R.id.text_editor)
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editor.setText(fileContent)
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editor.addTextChangedListener(object: TextWatcher {
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override fun afterTextChanged(s: Editable?) {
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}
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override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
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}
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override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
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if (!changedSinceLastSave){
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changedSinceLastSave = true
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@SuppressLint("SetTextI18n")
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title = "*$fileName"
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}
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}
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})
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}
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private fun save(): Boolean{
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var success = false
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val content = editor.text.toString().toByteArray()
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val fileHandle = encryptedVolume.openFileWriteMode(filePath)
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if (fileHandle != -1L) {
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var offset: Long = 0
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while (offset < content.size && encryptedVolume.write(fileHandle, offset, content, offset, content.size.toLong()).also { offset += it } > 0) {}
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if (offset == content.size.toLong()){
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success = encryptedVolume.truncate(filePath, offset)
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}
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encryptedVolume.closeFile(fileHandle)
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}
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if (success){
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Toast.makeText(this, getString(R.string.file_saved), Toast.LENGTH_SHORT).show()
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} else {
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Toast.makeText(this, getString(R.string.save_failed), Toast.LENGTH_SHORT).show()
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}
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return success
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}
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private fun checkSaveAndExit(){
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if (changedSinceLastSave){
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CustomAlertDialogBuilder(this, theme)
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.setTitle(R.string.warning)
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.setMessage(R.string.ask_save)
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.setPositiveButton(R.string.save) { _, _ ->
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if (save()){
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goBackToExplorer()
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}
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}
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.setNegativeButton(R.string.discard){ _, _ -> goBackToExplorer()}
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.show()
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} else {
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goBackToExplorer()
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}
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}
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override fun onCreateOptionsMenu(menu: Menu): Boolean {
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menuInflater.inflate(R.menu.text_editor, menu)
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menu.findItem(R.id.word_wrap).isChecked = wordWrap
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return true
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}
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override fun onOptionsItemSelected(item: MenuItem): Boolean {
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when (item.itemId){
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android.R.id.home -> {
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checkSaveAndExit()
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}
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R.id.menu_save -> {
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if (save()){
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changedSinceLastSave = false
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title = fileName
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}
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}
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R.id.word_wrap -> {
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wordWrap = !item.isChecked
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loadLayout(editor.text.toString())
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invalidateOptionsMenu()
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}
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else -> super.onOptionsItemSelected(item)
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}
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return true
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}
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}
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