Applications: Add new KeyboardSettings application

GUI application to manage Keyboard settings.

Applications/KeyboardSettings/CharacterMapFileListModel.h

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+/*
+ * Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/Vector.h>
+#include <LibGUI/Model.h>
+
+class CharacterMapFileListModel final : public GUI::Model {
+public:
+    static NonnullRefPtr<CharacterMapFileListModel> create(Vector<String>& file_names)
+    {
+        return adopt(*new CharacterMapFileListModel(file_names));
+    }
+
+    virtual ~CharacterMapFileListModel() override {}
+
+    virtual int row_count(const GUI::ModelIndex&) const override
+    {
+        return m_file_names.size();
+    }
+
+    virtual int column_count(const GUI::ModelIndex&) const override
+    {
+        return 1;
+    }
+
+    virtual GUI::Variant data(const GUI::ModelIndex& index, Role role = Role::Display) const override
+    {
+        ASSERT(index.is_valid());
+        ASSERT(index.column() == 0);
+
+        if (role == Role::Display)
+            return m_file_names.at(index.row());
+
+        return {};
+    }
+
+    virtual void update() override
+    {
+        did_update();
+    }
+
+private:
+    explicit CharacterMapFileListModel(Vector<String>& file_names)
+        : m_file_names(file_names)
+    {
+    }
+
+    Vector<String>& m_file_names;
+};