add quick switcher qml file and moved completerFor from inputbar to timeline view class

resources/qml/Completer.qml

@@ -52,7 +52,11 @@ Popup {
 
     onCompleterNameChanged: {
         if (completerName) {
-            completer = TimelineManager.timeline.input.completerFor(completerName);
+            if (completerName == "user") {
+                completer = TimelineManager.completerFor(completerName, TimelineManager.timeline.roomId());
+            } else {
+                completer = TimelineManager.completerFor(completerName);
+            }
             completer.setSearchString("");
         } else {
             completer = undefined;

resources/qml/QuickSwitcher.qml

@@ -0,0 +1,38 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.3
+import im.nheko 1.0
+
+Popup {
+    x: parent.width / 2 - width / 2
+    y: parent.height / 4 - height / 2
+    width: parent.width / 2
+    height: 100
+    modal: true
+    focus: true
+    closePolicy: Popup.CloseOnEscape | Popup.CloseOnPressOutside
+    parent: Overlay.overlay
+
+    TextInput {
+        id: roomTextInput
+
+        anchors.fill: parent
+        focus: true
+
+        onTextEdited: {
+            completerPopup.completer.setSearchString(text)
+        }
+    }
+
+    Completer {
+        id: completerPopup
+
+        x: roomTextInput.x + 100
+        y: roomTextInput.y - 20
+        completerName: "room"
+        bottomToTop: true
+    }
+
+    onOpened: {
+        completerPopup.open()
+    }
+}

resources/qml/TimelineView.qml

@@ -68,6 +68,22 @@ Page {
 
     }
 
+    Component {
+        id: quickSwitcherComponent
+
+        QuickSwitcher {
+            id: quickSwitcher
+        }
+    }
+
+    Shortcut {
+        sequence: "Ctrl+L"
+        onActivated: {
+            var quickSwitch = quickSwitcherComponent.createObject(timelineRoot);
+            quickSwitch.open();
+        }
+    }
+
     Menu {
         id: messageContextMenu
 

resources/res.qrc

@@ -139,6 +139,7 @@
         <file>qml/StatusIndicator.qml</file>
         <file>qml/TimelineRow.qml</file>
         <file>qml/TopBar.qml</file>
+        <file>qml/QuickSwitcher.qml</file>
         <file>qml/TypingIndicator.qml</file>
         <file>qml/RoomSettings.qml</file>
         <file>qml/emoji/EmojiButton.qml</file>

src/timeline/TimelineViewManager.cpp

@@ -11,13 +11,16 @@
 #include "BlurhashProvider.h"
 #include "ChatPage.h"
 #include "ColorImageProvider.h"
+#include "CompletionProxyModel.h"
 #include "DelegateChooser.h"
 #include "DeviceVerificationFlow.h"
 #include "Logging.h"
 #include "MainWindow.h"
 #include "MatrixClient.h"
 #include "MxcImageProvider.h"
+#include "RoomsModel.h"
 #include "UserSettingsPage.h"
+#include "UsersModel.h"
 #include "dialogs/ImageOverlay.h"
 #include "emoji/EmojiModel.h"
 #include "emoji/Provider.h"
@@ -552,3 +555,25 @@ TimelineViewManager::focusMessageInput()
 {
         emit focusInput();
 }
+
+QObject *
+TimelineViewManager::completerFor(QString completerName, QString roomId)
+{
+        if (completerName == "user") {
+                auto userModel = new UsersModel(roomId.toStdString());
+                auto proxy     = new CompletionProxyModel(userModel);
+                userModel->setParent(proxy);
+                return proxy;
+        } else if (completerName == "emoji") {
+                auto emojiModel = new emoji::EmojiModel();
+                auto proxy      = new CompletionProxyModel(emojiModel);
+                emojiModel->setParent(proxy);
+                return proxy;
+        } else if (completerName == "room") {
+                auto roomModel = new RoomsModel(true);
+                auto proxy     = new CompletionProxyModel(roomModel);
+                roomModel->setParent(proxy);
+                return proxy;
+        }
+        return nullptr;
+}

src/timeline/TimelineViewManager.h

@@ -138,6 +138,7 @@ public slots:
         }
 
         void backToRooms() { emit showRoomList(); }
+        QObject *completerFor(QString completerName, QString roomId = "");
 
 private:
 #ifdef USE_QUICK_VIEW