Reverting delete key hacks.

- Context #1178

Author: dessalines

app/src/main/java/com/dessalines/thumbkey/utils/Utils.kt

@@ -45,7 +45,6 @@ import com.dessalines.thumbkey.db.LayoutsUpdate
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import java.text.BreakIterator
 import java.text.NumberFormat
 import kotlin.math.PI
 import kotlin.math.abs
@@ -362,20 +361,11 @@ fun performKeyAction(
             ime.currentInputConnection.sendKeyEvent(ev)
         }
 
+        // Some apps are having problems with delete key events, and issues need to be opened up
+        // on their repos.
         is KeyAction.DeleteKeyAction -> {
-            if (ime.currentInputConnection.getSelectedText(0)?.isEmpty() != false) {
-                val textBeforeCursor = ime.currentInputConnection.getTextBeforeCursor(20, 0)?.toString()
-                if (textBeforeCursor.isNullOrEmpty()) {
-                    return
-                }
-
-                val lastClusterBoundary = findLastGraphemeClusterBoundary(textBeforeCursor)
-                if (lastClusterBoundary != -1) {
-                    ime.currentInputConnection.deleteSurroundingText(textBeforeCursor.length - lastClusterBoundary, 0)
-                }
-            } else {
-                ime.currentInputConnection.commitText("", 0)
-            }
+            val ev = KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)
+            ime.currentInputConnection.sendKeyEvent(ev)
         }
 
         is KeyAction.DeleteWordBeforeCursor -> {
@@ -1375,33 +1365,3 @@ fun updateLayouts(
         ),
     )
 }
-
-fun findLastGraphemeClusterBoundary(text: String): Int {
-    val boundary = BreakIterator.getCharacterInstance()
-    boundary.setText(text)
-
-    val end = text.length
-    var lastBoundary = boundary.preceding(end) // Find the previous grapheme boundary
-
-    // Check if this boundary is part of a ZWJ sequence
-    while (lastBoundary > 0 && isPartOfZWJSequence(text, lastBoundary)) {
-        lastBoundary = boundary.preceding(lastBoundary)
-    }
-
-    return lastBoundary
-}
-
-fun isPartOfZWJSequence(
-    text: String,
-    index: Int,
-): Boolean {
-    if (index <= 0 || index >= text.length) return false
-
-    // Check if the character before this boundary is a ZWJ
-    val previousChar = text[index - 1]
-    if (previousChar.code == 0x200D) { // Zero-Width Joiner
-        return true
-    }
-
-    return false
-}