Adjust keypad height for vkbd and ensure vkbd is always showing

look-and-feel/contents/lockscreen/Keypad.qml

@@ -32,7 +32,13 @@ Rectangle {
     
     opacity: Math.sin((Math.PI / 2) * swipeProgress + 1.5 * Math.PI) + 1
     
-    implicitHeight: passwordBar.isPinMode ? PlasmaCore.Units.gridUnit * 17 : passwordBar.implicitHeight
+    implicitHeight: {
+        if (passwordBar.isPinMode && !Qt.inputMethod.visible) {
+            return PlasmaCore.Units.gridUnit * 17;
+        } else {
+            return PlasmaCore.Units.smallSpacing * 2 + Qt.inputMethod.keyboardRectangle.height + passwordBar.implicitHeight;
+        }
+    }
     Behavior on implicitHeight {
         NumberAnimation {
             duration: Kirigami.Units.longDuration

look-and-feel/contents/lockscreen/LockScreen.qml

@@ -1,5 +1,6 @@
 /*
 SPDX-FileCopyrightText: 2019 Nicolas Fella <nicolas.fella@gmx.de>
+SPDX-FileCopyrightText: 2021 Devin Lin <espidev@gmail.com>
 
 SPDX-License-Identifier: GPL-2.0-or-later
 */

look-and-feel/contents/lockscreen/PasswordBar.qml

@@ -12,6 +12,7 @@ import org.kde.plasma.components 2.0 as PlasmaComponents
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.workspace.keyboardlayout 1.0
 import org.kde.kirigami 2.12 as Kirigami
+import org.kde.plasma.workspace.keyboardlayout 1.0 as Keyboards
 
 Rectangle {
     id: root
@@ -69,6 +70,10 @@ Rectangle {
         if (!authenticator.graceLocked) {
             authenticator.tryUnlock(root.password);
         }
+        if (keypadOpen && !isPinMode) {
+            // make sure keyboard doesn't close
+            openKeyboardTimer.restart();
+        }
     }
     
     function keyPress(data) {
@@ -85,6 +90,15 @@ Rectangle {
         }
     }
     
+    // HACK: we have to open the virtual keyboard after a certain amount of time or else it will close anyway
+    Timer {
+        id: openKeyboardTimer
+        interval: 10
+        running: false
+        repeat: false
+        onTriggered: Keyboards.KWinVirtualKeyboard.active = true
+    }
+    
     // trigger turning letter into dot after 500 milliseconds
     Timer {
         id: letterTimer
@@ -148,6 +162,15 @@ Rectangle {
         }
     }
     
+    MouseArea {
+        anchors.fill: parent
+        onClicked: {
+            // clicking on rectangle opens keyboard if not already open
+            if (!isPinMode) {
+                Keyboards.KWinVirtualKeyboard.active = true;
+            }
+        }
+        
         // toggle between showing keypad and not
         ToolButton {
             anchors.right: parent.right
@@ -249,4 +272,5 @@ Rectangle {
                 }
             }
         }
+    }
 }