select candidate on touch (#12)

Author: eagleoflqj

keyboard/fcitx.cpp

@@ -4,7 +4,6 @@
 #include "nativestreambuf.h"
 #include <fcitx-utils/event.h>
 #include <fcitx-utils/eventdispatcher.h>
-#include <fcitx/instance.h>
 #include <filesystem>
 #include <thread>
 

keyboard/util.h

@@ -1,7 +1,10 @@
+#pragma once
 
 #include <fcitx-utils/eventdispatcher.h>
+#include <fcitx/instance.h>
 #include <future>
 
+extern std::unique_ptr<fcitx::Instance> instance;
 extern std::unique_ptr<fcitx::EventDispatcher> dispatcher;
 
 template <class F, class T = std::invoke_result_t<F>>

uipanel/CandidateBar.swift

@@ -1,4 +1,5 @@
 import UIKit
+import UIPanel
 
 class CandidateCollectionView: UIView {
 
@@ -70,6 +71,7 @@ extension CandidateCollectionView: UICollectionViewDataSource {
 
 extension CandidateCollectionView: UICollectionViewDelegate {
   func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
+    selectCandidate(Int32(indexPath.item))
   }
 }
 

uipanel/module.modulemap

@@ -0,0 +1,3 @@
+module UIPanel {
+  header "uipanel-public.h"
+}

uipanel/uipanel-public.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void selectCandidate(int index);

uipanel/uipanel.cpp

@@ -1,7 +1,10 @@
 #include <fcitx/inputpanel.h>
 
 #include "../iosfrontend/iosfrontend.h"
+#include "../keyboard/fcitx.h"
+#include "../keyboard/util.h"
 #include "keyboardui-swift.h"
+#include "uipanel-public.h"
 #include "uipanel.h"
 
 namespace fcitx {
@@ -40,3 +43,18 @@ void UIPanel::update(UserInterfaceComponent component,
 }
 
 } // namespace fcitx
+
+void selectCandidate(int index) {
+    with_fcitx([index] {
+        auto ic = instance->mostRecentInputContext();
+        const auto &list = ic->inputPanel().candidateList();
+        if (!list)
+            return;
+        try {
+            // Engine is responsible for updating UI
+            list->candidate(index).select(ic);
+        } catch (const std::invalid_argument &e) {
+            FCITX_ERROR() << "select candidate index out of range";
+        }
+    });
+}