From 6011b620f9a315a419e7c6d854716c1525fe4bab Mon Sep 17 00:00:00 2001
From: Abdelilah El Aissaoui <aeab13@gmail.com>
Date: Fri, 1 Mar 2024 15:29:15 +0100
Subject: [PATCH] Added sample of basic syntax highlight for Kotlin

---
 .../com/jetpackduba/gitnuro/theme/Color.kt    |  12 +-
 .../com/jetpackduba/gitnuro/ui/diff/Diff.kt   | 140 +++++++++++++++++-
 2 files changed, 142 insertions(+), 10 deletions(-)

diff --git a/src/main/kotlin/com/jetpackduba/gitnuro/theme/Color.kt b/src/main/kotlin/com/jetpackduba/gitnuro/theme/Color.kt
index 705a50b..076bb59 100644
--- a/src/main/kotlin/com/jetpackduba/gitnuro/theme/Color.kt
+++ b/src/main/kotlin/com/jetpackduba/gitnuro/theme/Color.kt
@@ -23,8 +23,8 @@ val lightTheme = ColorsScheme(
     dialogOverlay = Color(0xAA000000),
     normalScrollbar = Color(0xFFCCCCCC),
     hoverScrollbar = Color(0xFF0070D8),
-    diffLineAdded = Color(0xFFd7ebd0),
-    diffLineRemoved = Color(0xFFf0d4d4),
+    diffLineAdded = Color(0xAAd7ebd0),
+    diffLineRemoved = Color(0xAAf0d4d4),
     isLight = true,
 )
 
@@ -50,8 +50,8 @@ val darkBlueTheme = ColorsScheme(
     dialogOverlay = Color(0xAA000000),
     normalScrollbar = Color(0xFF888888),
     hoverScrollbar = Color(0xFFCCCCCC),
-    diffLineAdded = Color(0xFF566f5a),
-    diffLineRemoved = Color(0xFF6f585e),
+    diffLineAdded = Color(0xAA566f5a),
+    diffLineRemoved = Color(0xAA6f585e),
     isLight = false,
 )
 
@@ -76,7 +76,7 @@ val darkGrayTheme = ColorsScheme(
     dialogOverlay = Color(0xAA000000),
     normalScrollbar = Color(0xFF888888),
     hoverScrollbar = Color(0xFFCCCCCC),
-    diffLineAdded = Color(0xFF5b7059),
-    diffLineRemoved = Color(0xFF74595c),
+    diffLineAdded = Color(0xAA5b7059),
+    diffLineRemoved = Color(0xAA74595c),
     isLight = false,
 )
\ No newline at end of file
diff --git a/src/main/kotlin/com/jetpackduba/gitnuro/ui/diff/Diff.kt b/src/main/kotlin/com/jetpackduba/gitnuro/ui/diff/Diff.kt
index 715e458..fad9352 100644
--- a/src/main/kotlin/com/jetpackduba/gitnuro/ui/diff/Diff.kt
+++ b/src/main/kotlin/com/jetpackduba/gitnuro/ui/diff/Diff.kt
@@ -1136,6 +1136,7 @@ fun SplitDiffLine(
 
 @Composable
 fun DiffLineText(line: Line, diffType: DiffType, onActionTriggered: () -> Unit) {
+    val fileExtension = diffType.filePath.split(".").lastOrNull()
     val text = line.text
     val hoverInteraction = remember { MutableInteractionSource() }
     val isHovered by hoverInteraction.collectIsHoveredAsState()
@@ -1170,10 +1171,7 @@ fun DiffLineText(line: Line, diffType: DiffType, onActionTriggered: () -> Unit)
 
         Row {
             Text(
-                text = text.replace(
-                    "\t",
-                    "    "
-                ).removeLineDelimiters(),
+                text = syntaxHighlight(fileExtension, text),
                 modifier = Modifier
                     .padding(start = 16.dp)
                     .fillMaxSize(),
@@ -1199,6 +1197,140 @@ fun DiffLineText(line: Line, diffType: DiffType, onActionTriggered: () -> Unit)
     }
 }
 
+
+fun syntaxHighlight(fileExtension: String?, text: String): AnnotatedString {
+    val cleanText = text.replace(
+        "\t",
+        "    "
+    ).removeLineDelimiters()
+
+    return if (cleanText.trimStart().startsWith("//")) {
+        AnnotatedString(cleanText, spanStyle = SpanStyle(color = Color(0xFF70C290)))
+    } else {
+        val words = cleanText.split(" ")
+
+        val builder = AnnotatedString.Builder()
+        val keywords = listOf(
+            "as",
+            "as?",
+            "break",
+            "by",
+            "catch",
+            "class",
+            "constructor",
+            "continue",
+            "do",
+            "dynamic",
+            "else",
+            "false",
+            "finally",
+            "for",
+            "fun",
+            "if",
+            "import",
+            "in",
+            "!in",
+            "interface",
+            "is",
+            "!is",
+            "null",
+            "object",
+            "package",
+            "return",
+            "super",
+            "this",
+            "throw",
+            "true",
+            "try",
+            "val",
+            "var",
+            "when",
+            "where",
+            "while",
+
+            // Modifiers
+            "actual",
+            "abstract",
+            "annotation",
+            "companion",
+            "const",
+            "crossinline",
+            "data",
+            "enum",
+            "expect",
+            "external",
+            "final",
+            "infix",
+            "inline",
+            "inner",
+            "internal",
+            "lateinit",
+            "noinline",
+            "open",
+            "operator",
+            "out",
+            "override",
+            "private",
+            "protected",
+            "public",
+            "reified",
+            "sealed",
+            "suspend",
+            "tailrec",
+            "vararg",
+        )
+
+        fun isAnnotation(word: String): Boolean = word.startsWith("@")
+
+        words.forEachIndexed { index, word ->
+            if (keywords.contains(word)) {
+                builder.append(
+                    AnnotatedString(
+                        word,
+                        spanStyle = SpanStyle(
+//                            color = Color(0xFF669ACD)
+                            color = Color(0xFF90c0f0)
+                        )
+                    )
+                )
+            } else if (isAnnotation(word)) {
+                builder.append(
+                    AnnotatedString(
+                        word,
+                        spanStyle = SpanStyle(
+                            color = Color(0xFFB3AE5F)
+                        )
+                    )
+                )
+            } else {
+                builder.append(word)
+            }
+
+            if (index < words.lastIndex) {
+                builder.append(" ")
+            }
+        }
+
+        builder.toAnnotatedString()
+    }
+}
+
+class Testtt {
+    companion object {
+        @JvmStatic
+        external fun test1()
+    }
+}
+//
+//class Pancakes private constructor(val pointer: Long) {
+//    constructor(message: String, num: Int) : this(initialize(message, num))
+//    companion object {
+//        fun initialize(message: String, num: Int): Long {
+//            return 0L
+//        }
+//    }
+//}
+
 @Composable
 fun LineNumber(text: String, remarked: Boolean) {
     Text(