/usr/share/unity8/Components/InputMethod.qml is in unity8-common 8.12+16.04.20160401-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | /*
 * Copyright (C) 2014,2015 Canonical, Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import QtQuick 2.4
import Unity.Application 0.1
import Ubuntu.Components 1.3
import Ubuntu.Gestures 0.1
Item {
    id: root
    property int transitionDuration: UbuntuAnimation.FastDuration
    MirSurfaceItem {
        id: surfaceItem
        anchors.fill: parent
        consumesInput: true
        surfaceWidth: width
        surfaceHeight: height
        surface: SurfaceManager.inputMethodSurface
        onLiveChanged: {
            if (surface !== null && !live) {
                surface = null;
            }
        }
    }
    TouchGate {
        x: UbuntuKeyboardInfo.x
        y: UbuntuKeyboardInfo.y
        width: UbuntuKeyboardInfo.width
        height: UbuntuKeyboardInfo.height
        targetItem: surfaceItem
    }
    state: {
        if (surfaceItem.surface &&
              surfaceItem.surfaceState != Mir.HiddenState &&
              surfaceItem.surfaceState != Mir.MinimizedState &&
              root.enabled) {
            return "shown";
        } else {
            return "hidden";
        }
    }
    states: [
        State {
            name: "shown"
            PropertyChanges {
                target: root
                visible: true
                y: 0
            }
        },
        State {
            name: "hidden"
            PropertyChanges {
                target: root
                visible: false
                // half-way down because the vkb occupies only the lower half of the surface
                // TODO: consider keyboard rotation
                y: root.parent.height / 2.0
            }
        }
    ]
    transitions: [
        Transition {
            from: "*"; to: "*"
            PropertyAction { property: "visible"; value: true }
            UbuntuNumberAnimation { property: "y"; duration: transitionDuration }
        }
    ]
}
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