GODT-1554 / 1555: Implement gRPC go service and Qt 5 frontend C++ app.

WIP: updates

WIP: cache on disk and autostart.

WIP: mail, keychain and more.

WIP: updated grpc version in go mod file.

WIP: user list.

WIP: RPC service placeholder

WIP: test C++ RPC client skeleton.

Other: missing license script update.

WIP: use Qt test framework.

WIP: test for app and login calls.

WIP: test for update & cache on disk calls.

WIP: tests for mail settings calls.

WIP: all client tests.

WIP: linter fixes.

WIP: fix missing license link.

WIP: update dependency_license script for gRPC and protobuf.

WIP: removed unused file.

WIP: app & login event streaming tests.

WIP: update event stream tests.

WIP: completed event streaming tests.

GODT-1554: qt C++ frontend skeleton.

WIP: C++ backend declaration.

wip: started drafting user model.

WIP: users. not functional.

WIP: invokable methods

WIP: Exception class + backend 'injection' into QML.

WIP: switch to VCPKG to ease multi-arch compilation,  C++ RPC client skeleton.

WIP: Renaming and reorganisation

WIP:introduced new 'grpc' go frontend.

WIP: Worker & Oveerseer for thread management.

WIP: added log to C++ app.

WIP: event stream architecture on Go side.

WIP: event parsing and streamer stopping.

WIP: Moved grpc to frontend subfolder + use vcpkg for gRPC and protobuf.

WIP: windows building ok

WIP: wired a few messages

WIP: more wiring.

WIP: Fixed imports after rebase on top of devel.

WIP: wired some bool and string properties.

WIP: more properties.

WIP: wired cache on disk stuff

WIP: connect event watcher.

WIP: login

WIP: fix showSplashScreen

WIP: Wired login calls.

WIP: user list.

WIP: Refactored main().

WIP: User retrieval .

WIP: no shared pointer in user model.

WIP: fixed user count.

WIP: cached goos.

WIP: Wired autostart

WIP: beta channel toggle wired.

WIP: User removal

WIP: wired theme

WIP: implemented configure apple mail.

WIP: split mode.

WIP: fixed user updates.

WIP: fixed Quit from tray icon

WIP: wired CurrentEmailClient

WIP: wired UseSSLForSMTP

WIP: wired change ports .

WIP: wired DoH. .

WIP: wired keychain calls.

WIP: wired autoupdate option.

WIP: QML Backend clean-up.

WIP: cleanup.

WIP: moved user related files in subfolder. .

WIP: User are managed using smart pointers.

WIP: cleanup.

WIP: more cleanup.

WIP: mail events forwarding

WIP: code inspection tweaks from CLion.

WIP: moved QML, cleanup, and missing copyright notices.

WIP: Backend is not QMLBackend.

Other: fixed issues reported by Leander. [skip ci]

internal/frontend/qt6/qml/tests/Buttons.qml

@@ -0,0 +1,76 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+RowLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    // Primary buttons
+    ButtonsColumn {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.fillHeight: true
+
+        iconLoading: "../icons/Loader_16.svg"
+    }
+
+    // Secondary buttons
+    ButtonsColumn {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.fillHeight: true
+
+        secondary: true
+        iconLoading: "../icons/Loader_16.svg"
+    }
+
+    // Secondary icons
+    ButtonsColumn {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.fillHeight: true
+
+        secondary: true
+        textNormal: ""
+        iconNormal: "../icons/ic-cross-close.svg"
+        textDisabled: ""
+        iconDisabled: "../icons/ic-cross-close.svg"
+        textLoading: ""
+        iconLoading: "../icons/Loader_16.svg"
+    }
+
+    // Icons
+    ButtonsColumn {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.fillHeight: true
+
+        textNormal: ""
+        iconNormal: "../icons/ic-cross-close.svg"
+        textDisabled: ""
+        iconDisabled: "../icons/ic-cross-close.svg"
+        textLoading: ""
+        iconLoading: "../icons/Loader_16.svg"
+    }
+}

internal/frontend/qt6/qml/tests/ButtonsColumn.qml

@@ -0,0 +1,76 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick.Layouts 1.12
+import QtQuick 2.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+ColumnLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    property string textNormal: "Button"
+    property string iconNormal: ""
+    property string textDisabled: "Disabled"
+    property string iconDisabled: ""
+    property string textLoading: "Loading"
+    property string iconLoading: ""
+    property bool secondary: false
+
+    Button {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+
+        Layout.minimumHeight: implicitHeight
+        Layout.minimumWidth: implicitWidth
+
+        text: root.textNormal
+        icon.source: iconNormal
+        secondary: root.secondary
+    }
+
+
+    Button {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+
+        Layout.minimumHeight: implicitHeight
+        Layout.minimumWidth: implicitWidth
+
+        text: root.textDisabled
+        icon.source: iconDisabled
+        secondary: root.secondary
+
+        enabled: false
+    }
+
+    Button {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+
+        Layout.minimumHeight: implicitHeight
+        Layout.minimumWidth: implicitWidth
+
+        text: root.textLoading
+        icon.source: iconLoading
+        secondary: root.secondary
+
+        loading: true
+    }
+}

internal/frontend/qt6/qml/tests/CheckBoxes.qml

@@ -0,0 +1,112 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+RowLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        CheckBox {
+            text: "Checkbox"
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: "Checkbox"
+            error: true
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: "Checkbox"
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+        CheckBox {
+            text: ""
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: ""
+            error: true
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: ""
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+    }
+
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        CheckBox {
+            text: "Checkbox"
+            checked: true
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: "Checkbox"
+            checked: true
+            error: true
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: "Checkbox"
+            checked: true
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+        CheckBox {
+            text: ""
+            checked: true
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: ""
+            checked: true
+            error: true
+            colorScheme: root.colorScheme
+        }
+
+        CheckBox {
+            text: ""
+            checked: true
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+    }
+}

internal/frontend/qt6/qml/tests/ComboBoxes.qml

@@ -0,0 +1,100 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+RowLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    ColumnLayout {
+        Layout.fillWidth: true
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            colorScheme: root.colorScheme
+        }
+
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            editable: true
+            colorScheme: root.colorScheme
+        }
+    }
+
+    ColumnLayout {
+        Layout.fillWidth: true
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            colorScheme: root.colorScheme
+            enabled: false
+        }
+
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            editable: true
+            colorScheme: root.colorScheme
+            enabled: false
+        }
+    }
+
+    ColumnLayout {
+        Layout.fillWidth: true
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            colorScheme: root.colorScheme
+            LayoutMirroring.enabled: true
+        }
+
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            editable: true
+            colorScheme: root.colorScheme
+            LayoutMirroring.enabled: true
+        }
+    }
+
+    ColumnLayout {
+        Layout.fillWidth: true
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            colorScheme: root.colorScheme
+            enabled: false
+            LayoutMirroring.enabled: true
+        }
+
+        ComboBox {
+            Layout.fillWidth: true
+            model: ["First", "Second", "Third"]
+            editable: true
+            colorScheme: root.colorScheme
+            enabled: false
+            LayoutMirroring.enabled: true
+        }
+    }
+}

internal/frontend/qt6/qml/tests/RadioButtons.qml

@@ -0,0 +1,112 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+RowLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: "Radio"
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: "Radio"
+            error: true
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: "Radio"
+            enabled: false
+        }
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: ""
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: ""
+            error: true
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: ""
+            enabled: false
+        }
+    }
+
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: "Radio"
+            checked: true
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: "Radio"
+            checked: true
+            error: true
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: "Radio"
+            checked: true
+            enabled: false
+        }
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: ""
+            checked: true
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: ""
+            checked: true
+            error: true
+        }
+
+        RadioButton {
+            colorScheme: root.colorScheme
+            text: ""
+            checked: true
+            enabled: false
+        }
+    }
+}

internal/frontend/qt6/qml/tests/Switches.qml

@@ -0,0 +1,114 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+RowLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        Switch {
+            text: "Toggle"
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: "Toggle"
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: "Toggle"
+            loading: true
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: ""
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: ""
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: ""
+            loading: true
+            colorScheme: root.colorScheme
+        }
+    }
+
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        Switch {
+            text: "Toggle"
+            checked: true
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: "Toggle"
+            checked: true
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: "Toggle"
+            checked: true
+            loading: true
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: ""
+            checked: true
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: ""
+            checked: true
+            enabled: false
+            colorScheme: root.colorScheme
+        }
+
+        Switch {
+            text: ""
+            checked: true
+            loading: true
+            colorScheme: root.colorScheme
+        }
+    }
+}

internal/frontend/qt6/qml/tests/Test.qml

@@ -0,0 +1,33 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick.Window 2.13
+
+import "../Proton"
+
+Window {
+    width: 800
+    height: 600
+    visible: true
+    TestComponents {
+        anchors.fill: parent
+        colorScheme: ProtonStyle.currentStyle
+    }
+    onClosing: {
+        Qt.quit()
+    }
+}

internal/frontend/qt6/qml/tests/TestComponents.qml

@@ -0,0 +1,86 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+Rectangle {
+    id: root
+    property ColorScheme colorScheme
+    color: colorScheme.background_norm
+    clip: true
+
+    implicitHeight: children[0].implicitHeight + children[0].anchors.topMargin + children[0].anchors.bottomMargin
+    implicitWidth: children[0].implicitWidth + children[0].anchors.leftMargin + children[0].anchors.rightMargin
+
+    ScrollView {
+        anchors.fill: parent
+
+        ColumnLayout {
+            anchors.margins: 20
+
+            width: root.width
+
+            spacing: 5
+
+            Buttons {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+
+            CheckBoxes {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+
+            ComboBoxes {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+
+            RadioButtons {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+
+            Switches {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+
+            TextAreas {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+
+            TextFields {
+                colorScheme: root.colorScheme
+                Layout.fillWidth: true
+                Layout.margins: 20
+            }
+        }
+    }
+}

internal/frontend/qt6/qml/tests/TextAreas.qml

@@ -0,0 +1,113 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+ColumnLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    spacing: 10
+
+    TextArea {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.preferredHeight: 100
+
+        placeholderText: "Placeholder"
+        label: "Label"
+        hint: "Hint"
+        assistiveText: "Assistive text"
+
+        wrapMode: TextInput.Wrap
+    }
+
+    TextArea {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.preferredHeight: 100
+
+        text: "Value"
+        placeholderText: "Placeholder"
+        label: "Label"
+        hint: "Hint"
+        assistiveText: "Assistive text"
+
+        wrapMode: TextInput.Wrap
+    }
+
+
+    TextArea {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.preferredHeight: 100
+
+        error: true
+
+        text: "Value"
+        placeholderText: "Placeholder"
+        label: "Label"
+        hint: "Hint"
+        errorString: "Error message"
+
+        wrapMode: TextInput.Wrap
+    }
+
+
+    TextArea {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.preferredHeight: 100
+
+        enabled: false
+
+        text: "Value"
+        placeholderText: "Placeholder"
+        label: "Label"
+        hint: "Hint"
+        assistiveText: "Assistive text"
+
+        wrapMode: TextInput.Wrap
+    }
+
+    TextArea {
+        colorScheme: root.colorScheme
+        Layout.fillWidth: true
+        Layout.preferredHeight: 100
+
+        placeholderText: "Type 42 here"
+        label: "42 Validator"
+        hint: "Accepts only \"42\""
+        assistiveText: "Type sometihng here, preferably 42"
+
+        wrapMode: TextInput.Wrap
+
+        validator: function(str) {
+            if (str === "42") {
+                return
+            }
+
+            return "Not 42"
+        }
+    }
+}
+

internal/frontend/qt6/qml/tests/TextFields.qml

@@ -0,0 +1,187 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQuick 2.13
+import QtQuick.Window 2.13
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 2.12
+
+import "../Proton"
+
+RowLayout {
+    id: root
+    property ColorScheme colorScheme
+
+    // Norm
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            placeholderText: "Placeholder"
+            label: "Label"
+            hint: "Hint"
+            assistiveText: "Assistive text"
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            text: "Value"
+            placeholderText: "Placeholder"
+            label: "Label"
+            hint: "Hint"
+            assistiveText: "Assistive text"
+        }
+
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+            error: true
+
+            text: "Value"
+            placeholderText: "Placeholder"
+            label: "Label"
+            hint: "Hint"
+            errorString: "Error message"
+        }
+
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            text: "Value"
+            placeholderText: "Placeholder"
+            label: "Label"
+            hint: "Hint"
+            assistiveText: "Assistive text"
+
+            enabled: false
+        }
+    }
+
+    // Masked
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+            echoMode: TextInput.Password
+            placeholderText: "Password"
+            label: "Label"
+            hint: "Hint"
+            assistiveText: "Assistive text"
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+            text: "Password"
+
+            echoMode: TextInput.Password
+            placeholderText: "Password"
+            label: "Label"
+            hint: "Hint"
+            assistiveText: "Assistive text"
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+            text: "Password"
+            error: true
+
+            echoMode: TextInput.Password
+            placeholderText: "Password"
+            label: "Label"
+            hint: "Hint"
+            errorString: "Error message"
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+            text: "Password"
+            enabled: false
+
+            echoMode: TextInput.Password
+            placeholderText: "Password"
+            label: "Label"
+            hint: "Hint"
+            assistiveText: "Assistive text"
+        }
+    }
+
+    // Varia
+    ColumnLayout {
+        Layout.fillWidth: true
+
+        spacing: parent.spacing
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            placeholderText: "Type 42 here"
+            label: "42 Validator"
+            hint: "Accepts only \"42\""
+            assistiveText: "Type sometihng here, preferably 42"
+
+            validator: function(str) {
+                if (str === "42") {
+                    return
+                }
+
+                return "Not 42"
+            }
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            placeholderText: "Placeholder"
+            label: "Label"
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            placeholderText: "Placeholder"
+            hint: "Hint"
+        }
+
+        TextField {
+            colorScheme: root.colorScheme
+            Layout.fillWidth: true
+
+            placeholderText: "Placeholder"
+            assistiveText: "Assistive text"
+        }
+    }
+}