fix: selected text not provide to presetkey option

Author: tumuyan

app/src/main/java/com/osfans/trime/ime/core/EditorInstance.kt

@@ -2,6 +2,7 @@ package com.osfans.trime.ime.core
 
 import android.inputmethodservice.InputMethodService
 import android.os.SystemClock
+import android.text.TextUtils
 import android.view.InputDevice
 import android.view.KeyCharacterMap
 import android.view.KeyEvent
@@ -126,6 +127,28 @@ class EditorInstance(private val ims: InputMethodService) {
         return ic.getTextBeforeCursor(n.coerceAtMost(1024), 0)?.toString() ?: ""
     }
 
+    /** 獲得當前漢字：候選字、選中字、剛上屏字/光標前字/光標前所有字、光標後所有字
+     * %s或者%1$s爲當前字符
+     * %2$s爲當前輸入的編碼
+     * %3$s爲光標前字符
+     * %4$s爲光標前所有字符
+     * */
+    fun getActiveText(type: Int): String {
+        if (type == 2) return Rime.RimeGetInput() // 當前編碼
+        var s = Rime.getComposingText() // 當前候選
+        if (TextUtils.isEmpty(s)) {
+            val ic = inputConnection
+            var cs = if (ic != null) ic.getSelectedText(0) else null // 選中字
+            if (type == 1 && TextUtils.isEmpty(cs)) cs = lastCommittedText // 剛上屏字
+            if (TextUtils.isEmpty(cs) && ic != null) {
+                cs = ic.getTextBeforeCursor(if (type == 4) 1024 else 1, 0) // 光標前字
+            }
+            if (TextUtils.isEmpty(cs) && ic != null) cs = ic.getTextAfterCursor(1024, 0) // 光標後面所有字
+            if (cs != null) s = cs.toString()
+        }
+        return s
+    }
+
     /**
      * Constructs a meta state integer flag which can be used for setting the `metaState` field when sending a KeyEvent
      * to the input connection. If this method is called without a meta modifier set to true, the default value `0` is

app/src/main/java/com/osfans/trime/ime/text/TextInputManager.kt

@@ -354,13 +354,23 @@ class TextInputManager private constructor() :
                 // %2$s爲當前輸入的編碼
                 // %3$s爲光標前字符
                 // %4$s爲光標前所有字符
-                val arg = String.format(
-                    event.option,
-                    activeEditorInstance.lastCommittedText,
-                    Rime.RimeGetInput(),
-                    activeEditorInstance.getTextBeforeCursor(1),
-                    activeEditorInstance.getTextBeforeCursor(1024)
-                )
+                var arg = event.option
+                val activeTextRegex = Regex(".*%(\\d*)\\$" + "s.*")
+                if (arg.matches(activeTextRegex)) {
+                    var activeTextMode =
+                        arg.replaceFirst(activeTextRegex, "$1").toDouble().toInt()
+                    if (activeTextMode <1)
+                        activeTextMode = 1
+                    val activeText = activeEditorInstance.getActiveText(activeTextMode)
+                    arg = String.format(
+                        arg,
+                        activeEditorInstance.lastCommittedText,
+                        Rime.RimeGetInput(),
+                        activeText,
+                        activeText
+                    )
+                }
+
                 if (event.command == "liquid_keyboard") {
                     trime.selectLiquidKeyboard(arg)
                 } else if (event.command == "paste_by_char") {