Multiplatform template in IDEA / Android Studio. Refactoring

examples/codeviewer/android/src/main/assets/data/EditorView.kt

@@ -1,5 +1,5 @@
 /**
- * This file is example (we can open it in android application)
+ * This file is an example (we can open it in android application)
  */
 
 package org.jetbrains.codeviewer.ui.editor
@@ -73,7 +73,7 @@ fun EditorView(model: Editor, settings: Settings) = key(model) {
 
 @Composable
 private fun Lines(lines: Editor.Lines, settings: Settings) = with(DensityAmbient.current) {
-    val maxNum = remember(lines.lineNumberDigitCount) {
+    val maxNumber = remember(lines.lineNumberDigitCount) {
         (1..lines.lineNumberDigitCount).joinToString(separator = "") { "9" }
     }
 
@@ -89,7 +89,7 @@ private fun Lines(lines: Editor.Lines, settings: Settings) = with(DensityAmbient
                 val line: Editor.Line? by loadable { lines.get(index) }
                 Box(Modifier.height(lineHeight)) {
                     if (line != null) {
-                        Line(Modifier.align(Alignment.CenterStart), maxNum, line!!, settings)
+                        Line(Modifier.align(Alignment.CenterStart), maxNumber, line!!, settings)
                     }
                 }
             }
@@ -108,11 +108,11 @@ private fun Lines(lines: Editor.Lines, settings: Settings) = with(DensityAmbient
 // دعم اللغة العربية
 // 中文支持
 @Composable
-private fun Line(modifier: Modifier, maxNum: String, line: Editor.Line, settings: Settings) {
+private fun Line(modifier: Modifier, maxNumber: String, line: Editor.Line, settings: Settings) {
     Row(modifier = modifier) {
         WithoutSelection {
             Box {
-                LineNumber(maxNum, Modifier.drawOpacity(0f), settings)
+                LineNumber(maxNumber, Modifier.drawOpacity(0f), settings)
                 LineNumber(line.number.toString(), Modifier.align(Alignment.CenterEnd), settings)
             }
         }

examples/codeviewer/android/src/main/java/org/jetbrains/codeviewer/MainActivity.kt

@@ -8,7 +8,6 @@ import org.jetbrains.codeviewer.ui.MainView
 import java.io.File
 import java.io.FileOutputStream
 
-
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

examples/codeviewer/common/src/jvmMain/kotlin/org/jetbrains/codeviewer/platform/JvmFile.kt

@@ -25,6 +25,7 @@ fun java.io.File.toProjectFile(): File = object : File {
         get() = isDirectory && listFiles()?.size ?: 0 > 0
 
     override suspend fun readLines(backgroundScope: CoroutineScope): TextLines {
+        // linePositions can be very big, so we are using IntList instead of List<Long>
         val linePositions = IntList()
         var size by mutableStateOf(0)
 
@@ -52,6 +53,7 @@ fun java.io.File.toProjectFile(): File = object : File {
                     try {
                         RandomAccessFile(this@toProjectFile, "rws").use {
                             it.seek(position.toLong())
+                            // NOTE: it isn't efficient, but simple
                             String(
                                 it.readLine()
                                     .toCharArray()
@@ -77,7 +79,6 @@ private suspend fun java.io.File.readLinePositions(list: IntList) = withContext(
     }
 
     val averageLineLength = 200
-    // linePositions can be very big, so we are using IntArray instead of List<Long>
     list.clear(length().toInt() / averageLineLength)
 
     var isBeginOfLine = true
@@ -107,6 +108,9 @@ private suspend fun java.io.File.readLinePositions(list: IntList) = withContext(
     list.compact()
 }
 
+/**
+ * Compact version of List<Int> (without unboxing Int and using IntArray under the hood)
+ */
 private class IntList(initialCapacity: Int = 16) {
     @Volatile
     private var array = IntArray(initialCapacity)