feat: allow user to determine the candidates view mode

app/src/main/java/com/osfans/trime/data/prefs/AppPrefs.kt

@@ -9,6 +9,7 @@ import android.content.SharedPreferences
 import androidx.preference.PreferenceManager
 import com.osfans.trime.R
 import com.osfans.trime.data.base.DataManager
+import com.osfans.trime.ime.candidates.popup.PopupCandidatesMode
 import com.osfans.trime.ime.enums.FullscreenMode
 import com.osfans.trime.ime.enums.InlinePreeditMode
 import com.osfans.trime.util.appContext
@@ -22,13 +23,28 @@ class AppPrefs(
 ) {
     private val applicationContext: WeakReference<Context> = WeakReference(appContext)
 
+    private val providers = mutableListOf<PreferenceDelegateProvider>()
+
+    fun <T : PreferenceDelegateProvider> registerProvider(providerF: (SharedPreferences) -> T): T {
+        val provider = providerF(shared)
+        providers.add(provider)
+        return provider
+    }
+
+    private fun <T : PreferenceDelegateProvider> T.register() =
+        this.apply {
+            registerProvider { this }
+        }
+
     val internal = Internal(shared)
     val keyboard = Keyboard(shared)
     val theme = Theme(shared)
     val profile = Profile(shared)
     val clipboard = Clipboard(shared)
     val other = Other(shared)
 
+    val candidates = Candidates(shared).register()
+
     companion object {
         private var defaultInstance: AppPrefs? = null
 
@@ -84,7 +100,6 @@ class AppPrefs(
         companion object {
             const val INLINE_PREEDIT_MODE = "keyboard__inline_preedit"
             const val SOFT_CURSOR_ENABLED = "keyboard__soft_cursor"
-            const val FLOATING_WINDOW_ENABLED = "keyboard__show_window"
             const val POPUP_KEY_PRESS_ENABLED = "keyboard__show_key_popup"
             const val SWITCHES_ENABLED = "keyboard__show_switches"
             const val LANDSCAPE_MODE = "keyboard__landscape_mode"
@@ -122,7 +137,6 @@ class AppPrefs(
         var inlinePreedit by enum(INLINE_PREEDIT_MODE, InlinePreeditMode.PREVIEW)
         var fullscreenMode by enum(FULLSCREEN_MODE, FullscreenMode.AUTO_SHOW)
         val softCursorEnabled by bool(SOFT_CURSOR_ENABLED, true)
-        val popupWindowEnabled by bool(FLOATING_WINDOW_ENABLED, true)
         val popupKeyPressEnabled by bool(POPUP_KEY_PRESS_ENABLED, false)
         val switchesEnabled by bool(SWITCHES_ENABLED, true)
         val switchArrowEnabled by bool(SWITCH_ARROW_ENABLED, true)
@@ -161,6 +175,16 @@ class AppPrefs(
         var isSpeakCommit by bool(SPEAK_COMMIT_ENABLED, false)
     }
 
+    class Candidates(
+        shared: SharedPreferences,
+    ) : PreferenceDelegateOwner(shared, R.string.candidates_window) {
+        companion object {
+            const val MODE = "candidates__mode"
+        }
+
+        val mode = enum(R.string.candidates_mode, MODE, PopupCandidatesMode.PREEDIT_ONLY)
+    }
+
     /**
      *  Wrapper class of theme and color settings.
      */

app/src/main/java/com/osfans/trime/ime/bar/QuickBar.kt

@@ -24,6 +24,7 @@ import com.osfans.trime.ime.bar.ui.CandidateUi
 import com.osfans.trime.ime.bar.ui.TabUi
 import com.osfans.trime.ime.broadcast.InputBroadcastReceiver
 import com.osfans.trime.ime.candidates.CompactCandidateModule
+import com.osfans.trime.ime.candidates.popup.PopupCandidatesMode
 import com.osfans.trime.ime.candidates.unrolled.window.FlexboxUnrolledCandidateWindow
 import com.osfans.trime.ime.core.TrimeInputMethodService
 import com.osfans.trime.ime.dependency.InputScope
@@ -51,6 +52,7 @@ class QuickBar(
     private val prefs = AppPrefs.defaultInstance()
 
     private val showSwitchers get() = prefs.keyboard.switchesEnabled
+    private val candidatesMode by prefs.candidates.mode
 
     val themedHeight =
         theme.generalStyle.candidateViewHeight + theme.generalStyle.commentHeight
@@ -145,7 +147,8 @@ class QuickBar(
     override fun onInputContextUpdate(ctx: RimeProto.Context) {
         barStateMachine.push(
             QuickBarStateMachine.TransitionEvent.CandidatesUpdated,
-            QuickBarStateMachine.BooleanKey.CandidateEmpty to ctx.menu.candidates.isEmpty(),
+            QuickBarStateMachine.BooleanKey.CandidateEmpty to
+                (ctx.menu.candidates.isEmpty() || candidatesMode == PopupCandidatesMode.CURRENT_PAGE),
         )
     }
 

app/src/main/java/com/osfans/trime/ime/candidates/CompactCandidateModule.kt

@@ -17,14 +17,18 @@ import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.flexbox.FlexboxLayoutManager
 import com.osfans.trime.R
+import com.osfans.trime.core.CandidateItem
+import com.osfans.trime.core.RimeProto
 import com.osfans.trime.daemon.RimeSession
 import com.osfans.trime.daemon.launchOnReady
+import com.osfans.trime.data.prefs.AppPrefs
 import com.osfans.trime.data.theme.ColorManager
 import com.osfans.trime.data.theme.Theme
 import com.osfans.trime.ime.bar.QuickBar
 import com.osfans.trime.ime.bar.UnrollButtonStateMachine
 import com.osfans.trime.ime.broadcast.InputBroadcastReceiver
 import com.osfans.trime.ime.candidates.adapter.CompactCandidateViewAdapter
+import com.osfans.trime.ime.candidates.popup.PopupCandidatesMode
 import com.osfans.trime.ime.candidates.unrolled.decoration.FlexboxVerticalDecoration
 import com.osfans.trime.ime.core.TrimeInputMethodService
 import com.osfans.trime.ime.dependency.InputScope
@@ -48,6 +52,8 @@ class CompactCandidateModule(
     val theme: Theme,
     val bar: QuickBar,
 ) : InputBroadcastReceiver {
+    private val candidatesMode by AppPrefs.defaultInstance().candidates.mode
+
     private val _unrolledCandidateOffset =
         MutableSharedFlow<Int>(
             replay = 1,
@@ -58,7 +64,7 @@ class CompactCandidateModule(
 
     fun refreshUnrolled() {
         runBlocking {
-            _unrolledCandidateOffset.emit(adapter.before + view.childCount)
+            _unrolledCandidateOffset.emit(adapter.previous + view.childCount)
         }
         bar.unrollButtonStateMachine.push(
             UnrollButtonStateMachine.TransitionEvent.UnrolledCandidatesUpdated,
@@ -70,10 +76,10 @@ class CompactCandidateModule(
     val adapter by lazy {
         CompactCandidateViewAdapter(theme).apply {
             setOnItemClickListener { _, _, position ->
-                rime.launchOnReady { it.selectCandidate(before + position) }
+                rime.launchOnReady { it.selectCandidate(previous + position) }
             }
             setOnItemLongClickListener { _, view, position ->
-                showCandidateAction(before + position, items[position].text, view)
+                showCandidateAction(previous + position, items[position].text, view)
                 true
             }
         }
@@ -110,6 +116,18 @@ class CompactCandidateModule(
         }
     }
 
+    override fun onInputContextUpdate(ctx: RimeProto.Context) {
+        if (candidatesMode != PopupCandidatesMode.PREEDIT_ONLY) return
+        val candidates = ctx.menu.candidates.map { CandidateItem(it.comment ?: "", it.text) }
+        val isLastPage = ctx.menu.isLastPage
+        val previous = ctx.menu.run { pageSize * pageNumber }
+        val highlightedIdx = ctx.menu.highlightedCandidateIndex
+        adapter.updateCandidates(candidates, isLastPage, previous, highlightedIdx)
+        if (candidates.isEmpty()) {
+            refreshUnrolled()
+        }
+    }
+
     private var candidateActionMenu: PopupMenu? = null
 
     fun showCandidateAction(

app/src/main/java/com/osfans/trime/ime/candidates/adapter/CompactCandidateViewAdapter.kt

@@ -21,9 +21,6 @@ import splitties.views.setPaddingDp
 open class CompactCandidateViewAdapter(
     val theme: Theme,
 ) : BaseQuickAdapter<CandidateItem, CandidateViewHolder>() {
-    var sticky: Int = 0
-        private set
-
     var isLastPage: Boolean = false
         private set
 
@@ -33,21 +30,16 @@ open class CompactCandidateViewAdapter(
     var highlightedIdx: Int = -1
         private set
 
-    val before: Int
-        get() = sticky + previous
-
     fun updateCandidates(
         list: List<CandidateItem>,
         isLastPage: Boolean,
         previous: Int,
         highlightedIdx: Int,
-        sticky: Int = 0,
     ) {
         this.isLastPage = isLastPage
         this.previous = previous
-        this.sticky = sticky
         this.highlightedIdx = highlightedIdx
-        super.submitList(list.drop(sticky))
+        super.submitList(list)
     }
 
     override fun onCreateViewHolder(
@@ -71,15 +63,14 @@ open class CompactCandidateViewAdapter(
         item: CandidateItem?,
     ) {
         val (comment, text) = item!!
-        val idx = sticky + position
         holder.ui.run {
             label.text = text
             altLabel.text = comment
-            highlight(theme.generalStyle.candidateUseCursor && idx == highlightedIdx)
+            highlight(theme.generalStyle.candidateUseCursor && position == highlightedIdx)
         }
         holder.text = text
         holder.comment = comment
-        holder.idx = before + position // unused
+        holder.idx = previous + position // unused
         holder.ui.root.updateLayoutParams<FlexboxLayoutManager.LayoutParams> {
             minWidth = 0
             flexGrow = 0f

app/src/main/java/com/osfans/trime/ime/candidates/popup/PagedCandidatesUi.kt

@@ -6,6 +6,7 @@
 package com.osfans.trime.ime.candidates.popup
 
 import android.content.Context
+import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import com.chad.library.adapter4.BaseQuickAdapter
@@ -72,6 +73,8 @@ class PagedCandidatesUi(
 
     override val root =
         recyclerView {
+            visibility = View.GONE
+
             isFocusable = false
             adapter = candidatesAdapter
             layoutManager = candidatesLayoutManager

app/src/main/java/com/osfans/trime/ime/candidates/popup/PopupCandidatesMode.kt

@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: 2015 - 2024 Rime community
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package com.osfans.trime.ime.candidates.popup
+
+import com.osfans.trime.R
+import com.osfans.trime.data.prefs.PreferenceDelegateEnum
+
+enum class PopupCandidatesMode(
+    override val stringRes: Int,
+) : PreferenceDelegateEnum {
+    CURRENT_PAGE(R.string.current_page_of_candidates),
+    PREEDIT_ONLY(R.string.preedit_only),
+}

app/src/main/java/com/osfans/trime/ime/candidates/unrolled/window/BaseUnrolledCandidateWindow.kt

@@ -124,8 +124,7 @@ abstract class BaseUnrolledCandidateWindow(
 
     private fun updateCandidatesWithOffset(offset: Int) {
         val candidates = compactCandidate.adapter.items
-        val sticky = compactCandidate.adapter.sticky
-        if (candidates.isEmpty() && sticky == 0) {
+        if (candidates.isEmpty()) {
             windowManager.attachWindow(KeyboardWindow)
         } else {
             adapter.refreshWithOffset(offset)
@@ -139,7 +138,7 @@ abstract class BaseUnrolledCandidateWindow(
         bar.unrollButtonStateMachine.push(
             UnrollButtonStateMachine.TransitionEvent.UnrolledCandidatesDetached,
             UnrollButtonStateMachine.BooleanKey.UnrolledCandidatesEmpty to
-                (compactCandidate.adapter.run { isLastPage && (before + itemCount) == adapter.offset }),
+                (compactCandidate.adapter.run { isLastPage && (previous + itemCount) == adapter.offset }),
         )
         offsetJob?.cancel()
         candidatesSubmitJob?.cancel()

app/src/main/java/com/osfans/trime/ime/composition/CandidatesView.kt

@@ -10,11 +10,14 @@ import android.content.Context
 import android.view.View
 import android.view.ViewGroup
 import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.core.view.postDelayed
 import com.osfans.trime.core.RimeProto
 import com.osfans.trime.daemon.RimeSession
 import com.osfans.trime.daemon.launchOnReady
+import com.osfans.trime.data.prefs.AppPrefs
 import com.osfans.trime.data.theme.Theme
 import com.osfans.trime.ime.candidates.popup.PagedCandidatesUi
+import com.osfans.trime.ime.candidates.popup.PopupCandidatesMode
 import splitties.dimensions.dp
 import splitties.views.dsl.constraintlayout.below
 import splitties.views.dsl.constraintlayout.bottomOfParent
@@ -32,6 +35,8 @@ class CandidatesView(
     val rime: RimeSession,
     val theme: Theme,
 ) : ConstraintLayout(ctx) {
+    private val candidatesMode by AppPrefs.defaultInstance().candidates.mode
+
     private var menu = RimeProto.Context.Menu()
     private var inputComposition = RimeProto.Context.Composition()
 
@@ -62,18 +67,34 @@ class CandidatesView(
     private fun updateUi() {
         if (evaluateVisibility()) {
             preeditUi.update(inputComposition)
-            preeditUi.root.visibility = if (preeditUi.visible) View.VISIBLE else View.GONE
-            candidatesUi.update(menu)
-            // visibility = View.VISIBLE
-        } else {
-            // visibility = View.GONE
+            when (candidatesMode) {
+                PopupCandidatesMode.CURRENT_PAGE -> {
+                    candidatesUi.root.let {
+                        postDelayed(200) {
+                            if (it.visibility == View.GONE) {
+                                it.visibility = View.VISIBLE
+                                return@postDelayed
+                            }
+                        }
+                    }
+                    candidatesUi.update(menu)
+                }
+
+                PopupCandidatesMode.PREEDIT_ONLY -> {
+                    candidatesUi.root.let {
+                        postDelayed(200) {
+                            if (it.visibility != View.GONE) {
+                                it.visibility = View.GONE
+                                candidatesUi.update(RimeProto.Context.Menu())
+                            }
+                        }
+                    }
+                }
+            }
         }
     }
 
     init {
-        // invisible by default
-        // visibility = GONE
-
         verticalPadding = dp(theme.generalStyle.layout.marginX)
         horizontalPadding = dp(theme.generalStyle.layout.marginY)
         add(