/* vim:set et sts=4 sw=4:

 *

 * ibus - The Input Bus

 *

 * Copyright(c) 2011-2014 Peng Huang <shawn.p.huang@gmail.com>

 * Copyright(c) 2018 Takao Fujiwara <takao.fujiwara1@gmail.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301

 * USA

 */

class ThemedRGBA {

    public Gdk.RGBA *normal_fg { get; set; }

    public Gdk.RGBA *normal_bg { get; set; }

    public Gdk.RGBA *selected_fg { get; set; }

    public Gdk.RGBA *selected_bg { get; set; }

    private Gtk.StyleContext m_style_context;

    public ThemedRGBA(Gtk.Widget widget) {

        this.normal_fg = null;

        this.normal_bg = null;

        this.selected_fg = null;

        this.selected_bg = null;

        /* Use the color of Gtk.TextView instead of Gtk.Label

         * because the selected label "color" is not configured

         * in "Adwaita" theme and the selected label "background-color"

         * is not configured in "Maia" theme.

         * https://github.com/ibus/ibus/issues/1871

         */

        Gtk.WidgetPath widget_path = new Gtk.WidgetPath();

        widget_path.append_type(typeof(Gtk.TextView));

        m_style_context = new Gtk.StyleContext();

        m_style_context.set_path(widget_path);

        m_style_context.add_class(Gtk.STYLE_CLASS_VIEW);

        /* "-gtk-secondary-caret-color" value is different

         * if the parent widget is set in "Menta" theme.

         */

        m_style_context.set_parent(widget.get_style_context());

        get_rgba();

        m_style_context.changed.connect(() => { get_rgba(); });

    }

    ~ThemedRGBA() {

        reset_rgba();

    }

    private void reset_rgba() {

        if (this.normal_fg != null) {

            this.normal_fg.free();

            this.normal_fg = null;

        }

        if (this.normal_bg != null) {

            this.normal_bg.free();

            this.normal_bg = null;

        }

        if (this.selected_fg != null) {

            this.selected_fg.free();

            this.selected_fg = null;

        }

        if (this.selected_bg != null) {

            this.selected_bg.free();

            this.selected_bg = null;

        }

    }

    private void get_rgba() {

        reset_rgba();

        Gdk.RGBA *normal_fg = null;

        Gdk.RGBA *normal_bg = null;

        Gdk.RGBA *selected_fg = null;

        Gdk.RGBA *selected_bg = null;

        m_style_context.get(Gtk.StateFlags.NORMAL,

                            "color",

                            out normal_fg);

        m_style_context.get(Gtk.StateFlags.SELECTED,

                            "color",

                            out selected_fg);

        string bg_prop = "background-color";

        m_style_context.get(Gtk.StateFlags.NORMAL,

                            bg_prop,

                            out normal_bg);

        m_style_context.get(Gtk.StateFlags.SELECTED,

                            bg_prop,

                            out selected_bg);

        if (normal_bg.red   == selected_bg.red &&

            normal_bg.green == selected_bg.green &&

            normal_bg.blue  == selected_bg.blue &&

            normal_bg.alpha == selected_bg.alpha) {

            normal_bg.free();

            normal_bg = null;

            normal_bg.free();

            normal_bg = null;

            bg_prop = "-gtk-secondary-caret-color";

            m_style_context.get(Gtk.StateFlags.NORMAL,

                                bg_prop,

                                out normal_bg);

            m_style_context.get(Gtk.StateFlags.SELECTED,

                                bg_prop,

                                out selected_bg);

        }

        this.normal_fg   = normal_fg;

        this.normal_bg   = normal_bg;

        this.selected_fg = selected_fg;

        this.selected_bg = selected_bg;

    }

}

class IconWidget: Gtk.Image {

    /**

     * IconWidget:

     * @icon_name_or_path: Can be a name or path but not stock id

     *     because gtk_icon_theme_load_icon() cannot fallback the

     *     stock id to a real file name against

     *     gtk_image_new_from_stock().

     * @size: #Gtk.IconSize

     */

    public IconWidget(string icon_name_or_path, Gtk.IconSize size) {

        Gdk.Pixbuf pixbuf = null;

        int fixed_width, fixed_height;

        Gtk.icon_size_lookup(size, out fixed_width, out fixed_height);

        try {

            if (icon_name_or_path[0] == '/') {

                pixbuf = new Gdk.Pixbuf.from_file(icon_name_or_path);

            } else {

                var theme = Gtk.IconTheme.get_default();

                pixbuf = theme.load_icon(icon_name_or_path, fixed_width, 0);

            }

        } catch (GLib.Error e) {

            try {

                var theme = Gtk.IconTheme.get_default();

                pixbuf = theme.load_icon("ibus-engine", fixed_width, 0);

            } catch (GLib.Error e) {

                set_from_icon_name("image-missing", size);

                return;

            }

        }

        if (pixbuf == null)

            return;

        float width = (float)pixbuf.get_width();

        float height = (float)pixbuf.get_height();

        float scale = fixed_width / (width > height ? width : height);

        width *= scale;

        height *= scale;

        pixbuf = pixbuf.scale_simple((int)width, (int)height, Gdk.InterpType.BILINEAR);

        set_from_pixbuf(pixbuf);

        show();

    }

}