Add font.features API to match the one in QFont

For convenience, we make this a map from strings to integers
and just ignore any entries which are not valid four-letter
tags.

[ChangeLog][QtQuick] Added font.features property for
fine-grained customization of the shaping process.

Change-Id: I4ceaed859c1641f7b5888b27fa5a5bd576b05547
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

3 files changed, 288 insertions, 0 deletions

diff --git a/tests/manual/fontfeatures/CMakeLists.txt b/tests/manual/fontfeatures/CMakeLists.txt
new file mode 100644
index 0000000000..7938d64803
--- /dev/null
+++ b/tests/manual/fontfeatures/CMakeLists.txt
@@ -0,0 +1,30 @@
+# Copyright (C) 2023 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+if (NOT QT_BUILD_STANDALONE_TESTS AND NOT QT_BUILDING_QT)
+    cmake_minimum_required(VERSION 3.16)
+    project(fontfeatures LANGUAGES C CXX ASM)
+    find_package(Qt6BuildInternals COMPONENTS STANDALONE_TEST)
+endif()
+
+qt_internal_add_manual_test(tst_manual_fontfeatures
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Qml
+        Qt::QuickControls2
+)
+
+# Resources:
+set(qmake_immediate_resource_files
+    "main.qml"
+)
+
+qt_internal_add_resource(tst_manual_fontfeatures "qmake_immediate"
+    PREFIX
+        "/"
+    FILES
+        ${qmake_immediate_resource_files}
+)
diff --git a/tests/manual/fontfeatures/main.cpp b/tests/manual/fontfeatures/main.cpp
new file mode 100644
index 0000000000..f2e86cc7de
--- /dev/null
+++ b/tests/manual/fontfeatures/main.cpp
@@ -0,0 +1,17 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtCore/qsettings.h>
+#include <QtGui/qguiapplication.h>
+#include <QtQml/qqmlapplicationengine.h>
+#include <QtQuickControls2/qquickstyle.h>
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    QQmlApplicationEngine engine;
+    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
+
+    return app.exec();
+}
diff --git a/tests/manual/fontfeatures/main.qml b/tests/manual/fontfeatures/main.qml
new file mode 100644
index 0000000000..e65568dc79
--- /dev/null
+++ b/tests/manual/fontfeatures/main.qml
@@ -0,0 +1,241 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+import QtCore
+import QtQuick
+import QtQuick.Controls
+import QtQuick.Layouts
+import QtQuick.Dialogs
+
+ApplicationWindow {
+    id: window
+    width: 800
+    height: 600
+    title: "Font features"
+    visible: true
+    color: "white"
+
+    function handleFont(font)
+    {
+        var map = font.features
+        for (var i = 0; i < listView.count; ++i) {
+            var item = listView.itemAtIndex(i)
+            if (item !== null) {
+                if (item.checkState === Qt.Checked)
+                    map[item.text] = true
+                else if (item.checkState === Qt.Unchecked)
+                    map[item.text] = false
+            }
+        }
+
+        font.features = map
+        return font
+    }
+
+    ColumnLayout {
+        anchors.fill: parent
+        RowLayout {
+            Text {
+                text: "Font:"
+            }
+            Text {
+                text: sampleText.font.family
+            }
+            ToolButton {
+                text: "..."
+                onClicked: fontDialog.visible = true
+            }
+        }
+        TextField {
+            id: sampleText
+            text: "This text is fine"
+            font.family: "Calibri"
+            font.pixelSize: 20
+        }
+        TextField {
+            id: smcpText
+            text: "Small caps"
+            font: {
+                "family": sampleText.font.family,
+                "pixelSize": sampleText.font.pixelSize,
+                "features": { "smcp": 1 }
+            }
+        }
+        TextField {
+            id: noLigaturesOrKerning
+            text: "This text is fine"
+            font.family: sampleText.font.family
+            font.pixelSize: sampleText.font.pixelSize
+            font.features: { "liga": 0, "dlig": 0, "clig": 0, "hlig": 0, "kern": 0 }
+        }
+
+        ListView {
+            id: listView
+            height: window.height / 2
+            width: window.width
+            model: [ "aalt",
+                "abvf",
+                "abvm",
+                "abvs",
+                "afrc",
+                "akhn",
+                "blwf",
+                "blwm",
+                "blws",
+                "calt",
+                "case",
+                "ccmp",
+                "cfar",
+                "chws",
+                "cjct",
+                "clig",
+                "cpct",
+                "cpsp",
+                "cswh",
+                "curs",
+                "cv01",
+                "c2pc",
+                "c2sc",
+                "dist",
+                "dlig",
+                "dnom",
+                "dtls",
+                "expt",
+                "falt",
+                "fin2",
+                "fin3",
+                "fina",
+                "flac",
+                "frac",
+                "fwid",
+                "half",
+                "haln",
+                "halt",
+                "hist",
+                "hkna",
+                "hlig",
+                "hngl",
+                "hojo",
+                "hwid",
+                "init",
+                "isol",
+                "ital",
+                "jalt",
+                "jp78",
+                "jp83",
+                "jp90",
+                "jp04",
+                "kern",
+                "lfbd",
+                "liga",
+                "ljmo",
+                "lnum",
+                "locl",
+                "ltra",
+                "ltrm",
+                "mark",
+                "med2",
+                "medi",
+                "mgrk",
+                "mkmk",
+                "mset",
+                "nalt",
+                "nlck",
+                "nukt",
+                "numr",
+                "onum",
+                "opbd",
+                "ordn",
+                "ornm",
+                "palt",
+                "pcap",
+                "pkna",
+                "pnum",
+                "pref",
+                "pres",
+                "pstf",
+                "psts",
+                "pwid",
+                "qwid",
+                "rand",
+                "rclt",
+                "rkrf",
+                "rlig",
+                "rphf",
+                "rtbd",
+                "rtla",
+                "rtlm",
+                "ruby",
+                "rvrn",
+                "salt",
+                "sinf",
+                "size",
+                "smcp",
+                "smpl",
+                "ss01",
+                "ss02",
+                "ss03",
+                "ss04",
+                "ss05",
+                "ss06",
+                "ss07",
+                "ss08",
+                "ss09",
+                "ss10",
+                "ss11",
+                "ss12",
+                "ss13",
+                "ss14",
+                "ss15",
+                "ss16",
+                "ss17",
+                "ss18",
+                "ss19",
+                "ss20",
+                "ssty",
+                "stch",
+                "subs",
+                "sups",
+                "swsh",
+                "titl",
+                "tjmo",
+                "tnam",
+                "tnum",
+                "trad",
+                "twid",
+                "unic",
+                "valt",
+                "vatu",
+                "vchw",
+                "vert",
+                "vhal",
+                "vjmo",
+                "vkna",
+                "vkrn",
+                "vpal",
+                "vrt2",
+                "vrtr",
+                "zero"
+            ]
+
+            delegate: CheckBox {
+                id: checkBox
+                text: modelData
+                tristate: true
+                checkState: Qt.PartiallyChecked
+                onCheckedChanged: {
+                    sampleText.font = handleFont(fontDialog.currentFont)
+                }
+            }
+        }
+    }
+
+    FontDialog {
+        id: fontDialog
+        visible: false
+        title: "Please select a font"
+        onAccepted: {
+            sampleText.font = handleFont(fontDialog.currentFont)
+        }
+    }
+}