follow code in popup keys

code will always be preferred over a|b style labels
add some tests for adjusted KeySpecParser
fixes #466

app/src/main/java/helium314/keyboard/keyboard/Key.java

@@ -1120,7 +1120,6 @@ public class Key implements Comparable<Key> {
                 mHintLabel = null;
             } else {
                 // maybe also always null for comma and period keys
-                // todo: maybe remove mKeyboardParams.mHintLabelFromFirstMoreKey?
                 final String hintLabel = MoreKeysUtilsKt.getHintLabel(popupSet, params, keySpec);
                 mHintLabel = needsToUpcase
                         ? StringUtils.toTitleCaseOfKeyLabel(hintLabel, localeForUpcasing)

app/src/main/java/helium314/keyboard/keyboard/internal/KeySpecParser.java

@@ -18,7 +18,7 @@ import androidx.annotation.Nullable;
 
 /**
  * The string parser of the key specification.
- *
+ * <p>
  * Each key specification is one of the following:
  * - Label optionally followed by keyOutputText (keyLabel|keyOutputText).
  * - Label optionally followed by code point (keyLabel|!code/code_name).
@@ -83,7 +83,7 @@ public final class KeySpecParser {
     private static int indexOfLabelEnd(@NonNull final String keySpec) {
         final int length = keySpec.length();
         if (keySpec.indexOf(BACKSLASH) < 0) {
-            final int labelEnd = keySpec.indexOf(VERTICAL_BAR);
+            final int labelEnd = keySpec.lastIndexOf(VERTICAL_BAR);
             if (labelEnd == 0) {
                 if (length == 1) {
                     // Treat a sole vertical bar as a special case of key label.
@@ -95,12 +95,12 @@ public final class KeySpecParser {
             }
             return labelEnd;
         }
-        for (int pos = 0; pos < length; pos++) {
+        for (int pos = length - 1; pos >= 0; pos--) {
             final char c = keySpec.charAt(pos);
-            if (c == BACKSLASH && pos + 1 < length) {
-                // Skip escape char
-                pos++;
-            } else if (c == VERTICAL_BAR) {
+            if (c != VERTICAL_BAR) continue;
+            if (pos > 0 && keySpec.charAt(pos - 1) == BACKSLASH) {
+                pos--; // Skip escape char
+            } else {
                 return pos;
             }
         }

app/src/main/java/helium314/keyboard/keyboard/internal/keyboard_parser/KeyboardParser.kt

@@ -289,7 +289,7 @@ abstract class KeyboardParser(private val params: KeyboardParams, private val co
                 if (key.type != KeyType.NUMERIC && keyParams.mBackgroundType != Key.BACKGROUND_TYPE_ACTION)
                     keyParams.mBackgroundType = Key.BACKGROUND_TYPE_FUNCTIONAL
 
-                if (params.mId.mElementId == KeyboardId.ELEMENT_PHONE && key.popup.main?.getLabel(params)?.length?.let { it > 1 } == true) {
+                if (params.mId.mElementId == KeyboardId.ELEMENT_PHONE && key.popup.main?.getPopupLabel(params)?.length?.let { it > 1 } == true) {
                     keyParams.mMoreKeys = null // the ABC and stuff labels should not create moreKeys
                 }
                 if (keyParams.mLabel?.length?.let { it > 1 } == true && keyParams.mLabel?.startsWith("!string/") == true) {

app/src/main/java/helium314/keyboard/keyboard/internal/keyboard_parser/floris/KeyData.kt

@@ -49,7 +49,13 @@ interface AbstractKeyData {
      */
     fun asString(isForDisplay: Boolean): String // todo: remove it? not used at all (better only later, maybe useful for getting display label in some languages)
 
-    fun getLabel(params: KeyboardParams) = if (this is KeyData) label else compute(params)?.label ?: ""
+    /** get the label, but also considers code, which can't be set separately for popup keys and thus goes into the label */
+    fun getPopupLabel(params: KeyboardParams): String {
+        val keyData = if (this is KeyData) this else compute(params) ?: return ""
+        if (keyData.code == KeyCode.UNSPECIFIED || keyData.code < 0) // don't allow negative codes in popups
+            return keyData.label
+        return "${keyData.label}|${StringUtils.newSingleCodePointString(keyData.code)}"
+    }
 }
 
 /**

app/src/main/java/helium314/keyboard/keyboard/internal/keyboard_parser/floris/PopupSet.kt

@@ -9,8 +9,8 @@ import kotlinx.serialization.Serializable
 import helium314.keyboard.keyboard.internal.KeySpecParser
 import helium314.keyboard.keyboard.internal.KeyboardParams
 
-// taken from FlorisBoard, considerably modified
-// we don't care about the difference between main and relevant in this app
+// only the constructor and name remain from FlorisBoard
+// we don't care about the difference between main and relevant (at least for now)
 @Serializable
 open class PopupSet<T : AbstractKeyData>(
     open val main: T? = null,
@@ -20,8 +20,8 @@ open class PopupSet<T : AbstractKeyData>(
     open fun getPopupKeyLabels(params: KeyboardParams): Collection<String>? {
         if (main == null && relevant == null) return null
         val moreKeys = mutableListOf<String>()
-        main?.getLabel(params)?.let { moreKeys.add(KeySpecParser.getLabel(it)!!) }
-        relevant?.let { moreKeys.addAll(it.map { KeySpecParser.getLabel(it.getLabel(params))!! }) }
+        main?.getPopupLabel(params)?.let { moreKeys.add(it) }
+        relevant?.let { moreKeys.addAll(it.map { it.getPopupLabel(params) }) }
         if (moreKeys.isEmpty()) return null
         return moreKeys
     }

app/src/main/java/helium314/keyboard/latin/utils/CustomLayoutUtils.kt

@@ -148,6 +148,7 @@ fun editCustomLayout(layoutName: String, context: Context, startContent: String?
             val isJson = checkLayout(content, context)
             if (isJson == null) {
                 editCustomLayout(layoutName, context, content)
+                // todo: this actually always returns the "simple layout" error, even on a json layout with a single small error
                 infoDialog(context, context.getString(R.string.layout_error, Log.getLog(10).lastOrNull { it.tag == TAG }?.message))
             } else {
                 val wasJson = file.name.substringAfterLast(".") == "json"

app/src/main/java/helium314/keyboard/latin/utils/MoreKeysUtils.kt

@@ -15,6 +15,7 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.ListAdapter
 import androidx.recyclerview.widget.RecyclerView
 import helium314.keyboard.keyboard.Key
+import helium314.keyboard.keyboard.internal.KeySpecParser
 import helium314.keyboard.keyboard.internal.KeyboardParams
 import helium314.keyboard.keyboard.internal.keyboard_parser.floris.PopupSet
 import helium314.keyboard.keyboard.internal.keyboard_parser.rtlLabel
@@ -80,11 +81,10 @@ fun getHintLabel(popupSet: PopupSet<*>?, params: KeyboardParams, label: String):
         if (hintLabel != null) break
     }
 
-    // don't do the rtl transform, hint label is only the label
-    return hintLabel?.let { if (it == "$$$") transformLabel(it, params) else it }
+    return hintLabel?.let { KeySpecParser.getLabel(transformLabel(it, params)) }
         // avoid e.g. !autoColumnOrder! as label
         //  this will avoid having labels on comma and period keys
-        ?.takeIf { !it.startsWith("!") || it == "!" }
+        ?.takeIf { !it.startsWith("!") || it.count { it == '!' } != 2 } // excluding the special labels
 }
 
 private fun transformLabel(label: String, params: KeyboardParams): String =