refactor: remove RAW_INPUT mode from ComposingTextMode

It's rarely used.

Author: WhiredPlanck

app/src/main/java/com/osfans/trime/core/Rime.kt

@@ -46,9 +46,6 @@ class Rime :
     override var menuCached = RimeProto.Context.Menu()
         private set
 
-    override var rawInputCached = ""
-        private set
-
     private val dispatcher =
         RimeDispatcher(
             object : RimeDispatcher.RimeController {
@@ -263,7 +260,6 @@ class Rime :
             }
             is RimeMessage.CompositionMessage -> {
                 compositionCached = it.data
-                rawInputCached = getRimeRawInput()
             }
             is RimeMessage.CandidateMenuMessage -> menuCached = it.data
             is RimeMessage.StatusMessage -> {

app/src/main/java/com/osfans/trime/core/RimeApi.kt

@@ -20,8 +20,6 @@ interface RimeApi {
 
     val menuCached: RimeProto.Context.Menu
 
-    val rawInputCached: String
-
     suspend fun isEmpty(): Boolean
 
     suspend fun deploy()

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

@@ -15,5 +15,4 @@ enum class ComposingTextMode(
     DISABLE(R.string.disable),
     PREEDIT(R.string.preedit),
     COMMIT_TEXT_PREVIEW(R.string.commit_text_preview),
-    RAW_INPUT(R.string.raw_input),
 }

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

@@ -881,15 +881,14 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
                 ComposingTextMode.DISABLE -> ""
                 ComposingTextMode.PREEDIT -> composition.preedit ?: ""
                 ComposingTextMode.COMMIT_TEXT_PREVIEW -> composition.commitTextPreview ?: ""
-                ComposingTextMode.RAW_INPUT -> rime.run { rawInputCached }
             }
         if (ic.getSelectedText(0).isNullOrEmpty() || text.isNotEmpty()) {
             ic.setComposingText(text, 1)
         }
     }
 
     fun getActiveText(type: Int): String {
-        if (type == 2) return rime.run { rawInputCached } // 當前編碼
+        if (type == 2) return rime.run { compositionCached }.preedit ?: "" // 當前編碼
         var text: CharSequence? = rime.run { compositionCached }.commitTextPreview // 當前候選
         if (text.isNullOrEmpty()) {
             val info = currentInputEditorInfo