/*
 * ct_main_win.cc
 *
 * Copyright 2009-2024
 * Giuseppe Penone <giuspen@gmail.com>
 * Evgenii Gurianov <https://github.com/txe>
 *
 * 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; either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include "ct_main_win.h"
#include "ct_actions.h"
#include "ct_storage_control.h"
#include "ct_clipboard.h"

CtMainWin::CtMainWin(bool                            no_gui,
                     CtConfig*                       pCtConfig,
                     CtTmp*                          pCtTmp,
                     Gtk::IconTheme*                 pGtkIconTheme,
                     Glib::RefPtr<Gtk::TextTagTable> rGtkTextTagTable,
                     Glib::RefPtr<Gtk::CssProvider>  rGtkCssProvider,
                     Gsv::LanguageManager*           pGsvLanguageManager,
                     Gsv::StyleSchemeManager*        pGsvStyleSchemeManager,
                     CtStatusIcon*                   pCtStatusIcon)
 : Gtk::ApplicationWindow{}
 , _no_gui{no_gui}
 , _pCtConfig{pCtConfig}
 , _pCtTmp{pCtTmp}
 , _pGtkIconTheme{pGtkIconTheme}
 , _rGtkTextTagTable{rGtkTextTagTable}
 , _rGtkCssProvider{rGtkCssProvider}
 , _pGsvLanguageManager{pGsvLanguageManager}
 , _pGsvStyleSchemeManager{pGsvStyleSchemeManager}
 , _pCtStatusIcon{pCtStatusIcon}
 , _ctTextview{this}
 , _ctStateMachine{this}
{
    get_style_context()->add_class("ct-app-win");
    set_icon(_pGtkIconTheme->load_icon(CtConst::APP_NAME, 48));

    _uCtActions.reset(new CtActions{this});
    _uCtMenu.reset(new CtMenu{this});
    _pSaveMenuAction = _uCtMenu->find_action("ct_save");
    _uCtPrint.reset(new CtPrint{this});
    _uCtStorage.reset(CtStorageControl::create_dummy_storage(this));

    _scrolledwindowTree.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
    _scrolledwindowTree.get_style_context()->add_class("ct-tree-scroll-panel");
    _scrolledwindowText.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
    _scrolledwindowText.add(_ctTextview);
    _vboxText.pack_start(_init_window_header(), false, false);
    _vboxText.pack_start(_scrolledwindowText);
    if (_pCtConfig->treeRightSide) {
        _hPaned.pack1(_vboxText, Gtk::EXPAND);
        _hPaned.pack2(_scrolledwindowTree, Gtk::FILL);
    }
    else {
        _hPaned.pack1(_scrolledwindowTree, Gtk::FILL);
        _hPaned.pack2(_vboxText, Gtk::EXPAND);
    }
    _hPaned.property_wide_handle() = true;
    _vPaned.pack1(_hPaned, Gtk::EXPAND);
    _vPaned.pack2(_hBoxVte, Gtk::FILL);
    _vPaned.property_wide_handle() = true;

    _pMenuBar = _uCtMenu->build_menubar();
    _pScrolledWindowMenuBar = Gtk::manage(new Gtk::ScrolledWindow{});
    _pScrolledWindowMenuBar->add(*_pMenuBar);
    _pMenuBar->set_name("MenuBar");
    _pBookmarksSubmenus[0] = CtMenu::find_menu_item(_pMenuBar, "BookmarksSubMenu");
    auto pPopumMenuTree = _uCtMenu->get_popup_menu(CtMenu::POPUP_MENU_TYPE::Node);
    for (Gtk::Widget* child : pPopumMenuTree->get_children()) {
        if (auto menuItem = dynamic_cast<Gtk::MenuItem*>(child)) {
            if (menuItem->has_submenu()) {
                _pBookmarksSubmenus[1] = menuItem; // TODO FIND BETTER WAY TO IDENTIFY THAN FIRST WITH SUBMENU
                break;
            }
        }
    }
    _pBookmarksSubmenus[2] = CtMenu::find_menu_item(_pMenuBar, "BookmarksMenu");
    _pRecentDocsSubmenu = CtMenu::find_menu_item(_pMenuBar, "RecentDocsSubMenu");
    _pMenuBar->show_all();
    add_accel_group(_uCtMenu->get_accel_group());
    _pToolbars = _uCtMenu->build_toolbars(_pRecentDocsMenuToolButton, _pSaveToolButton);

    if (_pCtConfig->menubarInTitlebar) {
        _pHeaderBar = Gtk::manage(new Gtk::HeaderBar{});
        _pHeaderBar->set_has_subtitle(false);
        _pHeaderBar->set_show_close_button(true);
        _pHeaderBar->pack_start(*Gtk::manage(new Gtk::Label{" "}));
        _pHeaderBar->pack_start(*_pScrolledWindowMenuBar);
        _pHeaderBar->pack_start(*Gtk::manage(new Gtk::Label{" "}));
        _pHeaderBar->show_all();
        set_titlebar(*_pHeaderBar);
    }
    else {
        _vboxMain.pack_start(*_pScrolledWindowMenuBar, false, false);
    }
    for (auto pToolbar : _pToolbars) {
        _vboxMain.pack_start(*pToolbar, false, false);
    }
    _vboxMain.pack_start(_vPaned);
    _vboxMain.pack_start(_init_status_bar(), false, false);
    _vboxMain.show_all();
    add(_vboxMain);

    _reset_CtTreestore_CtTreeview();

    _ctTextview.get_style_context()->add_class("ct-view-panel");
    _ctTextview.set_sensitive(false);

    _ctTextview.signal_populate_popup().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_populate_popup));
    _ctTextview.signal_motion_notify_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_motion_notify_event));
    _ctTextview.signal_visibility_notify_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_visibility_notify_event));
    _ctTextview.signal_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_event));
    _ctTextview.signal_event_after().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_event_after));
    _ctTextview.signal_scroll_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_scroll_event));

    _uCtPairCodeboxMainWin.reset(new CtPairCodeboxMainWin{nullptr, this});
    g_signal_connect(G_OBJECT(_ctTextview.gobj()), "cut-clipboard", G_CALLBACK(CtClipboard::on_cut_clipboard), _uCtPairCodeboxMainWin.get());
    g_signal_connect(G_OBJECT(_ctTextview.gobj()), "copy-clipboard", G_CALLBACK(CtClipboard::on_copy_clipboard), _uCtPairCodeboxMainWin.get());
    g_signal_connect(G_OBJECT(_ctTextview.gobj()), "paste-clipboard", G_CALLBACK(CtClipboard::on_paste_clipboard), _uCtPairCodeboxMainWin.get());

    signal_key_press_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_window_key_press_event), false);
    signal_show().connect([this](){
        auto rGdkWin = this->get_window();
        if (rGdkWin) {
            rGdkWin->set_events(rGdkWin->get_events() | Gdk::STRUCTURE_MASK);
            //spdlog::debug("OK events + STRUCTURE_MASK");
        }
        else {
            spdlog::warn("!! unexp not get_window()");
        }
    });

    file_autosave_restart();
    mod_time_sentinel_restart();

    window_title_update(false/*saveNeeded*/);

    config_apply();

    menu_set_items_recent_documents();
    _uCtMenu->find_action("ct_vacuum")->signal_set_visible.emit(false);
    menu_top_optional_bookmarks_enforce();

    if (_no_gui) {
        set_visible(false);
    }
    else {
        if (start_on_systray_is_active()) {
            /* Calling the 'present()' function apparently sets up selected
               node visibility within the TreeView panel, whereas this
               node setup is skipped when only calling 'set_visible(false)'.
               Calling 'present()' and then hiding the window with
               'set_visible(false)' works to place the selected node within
               the visible portion of the TreeView panel but does not seem
               like the correct way to achieve this. Is there a function
               that specifically sets the selected node to the top row of
               the visible area in the panel?
            */
            present();
            set_visible(false);
        }
        else {
            present();
        }
        Glib::signal_idle().connect_once([this](){
            _hPaned.property_position() = _pCtConfig->hpanedPos; // must be after present() + process events pending (#1534, #1918, #2126)
            _vPaned.property_position() = _pCtConfig->vpanedPos;
            _ctTextview.signal_size_allocate().connect(sigc::mem_fun(*this, &CtMainWin::_on_textview_size_allocate));
            signal_configure_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_window_configure_event), false);

            // show status icon if needed
            if (_pCtConfig->systrayOn) {
                get_status_icon()->set_visible(true);
            }
        });
    }

    dispatcherErrorMsg.connect(sigc::mem_fun(*this, &CtMainWin::_on_dispatcher_error_msg));
}

CtMainWin::~CtMainWin()
{
    _autosave_timout_connection.disconnect();
    _mod_time_sentinel_timout_connection.disconnect();
    //std::cout << "~CtMainWin" << std::endl;
}

void CtMainWin::_on_dispatcher_error_msg()
{
    const std::string eroor_msg = errorsDEQueue.pop_front();
    CtDialogs::error_dialog(eroor_msg, *this);
}

bool CtMainWin::start_on_systray_is_active() const
{
    return _pCtConfig->systrayOn and _pCtConfig->startOnSystray;
}

void CtMainWin::start_on_systray_delayed_file_open_set(const std::string& filepath, const std::string& nodename, const std::string& anchorname)
{
    _startOnSystray_delayedFilepath = filepath;
    _startOnSystray_delayedNodeName = nodename;
    _startOnSystray_delayedAnchorName = anchorname;
}

bool CtMainWin::start_on_systray_delayed_file_open_kick()
{
    if (not _startOnSystray_delayedFilepath.empty()) {
        const std::string startOnSystray_delayedFilepath = _startOnSystray_delayedFilepath;
        const std::string startOnSystray_delayedNodeName = _startOnSystray_delayedNodeName;
        const std::string startOnSystray_delayedAnchorName = _startOnSystray_delayedAnchorName;
        _startOnSystray_delayedFilepath.clear();
        _startOnSystray_delayedNodeName.clear();
        _startOnSystray_delayedAnchorName.clear();
        if (file_open(startOnSystray_delayedFilepath, startOnSystray_delayedNodeName, startOnSystray_delayedAnchorName)) {
            return true;
        }
        spdlog::warn("%s Couldn't open file: %s", __FUNCTION__, _startOnSystray_delayedFilepath);
    }
    return false;
}

const char* CtMainWin::get_code_icon_name(std::string code_type)
{
    for (const auto& iconPair : CtConst::NODE_CODE_ICONS) {
        if (0 == strcmp(iconPair.first, code_type.c_str())) {
            return iconPair.second;
        }
    }
    return CtStockIcon::at(CtConst::NODE_ICON_CODE_ID);
}

Gtk::Image* CtMainWin::new_managed_image_from_stock(const std::string& stockImage, Gtk::BuiltinIconSize size)
{
    auto pImage = Gtk::manage(new Gtk::Image{});
    pImage->set_from_icon_name(stockImage, size);
    return pImage;
}

void CtMainWin::_reset_CtTreestore_CtTreeview()
{
    _prevTreeIter = CtTreeIter{};
    _nodesCursorPos.clear();
    _nodesVScrollPos.clear();

    _scrolledwindowTree.remove();
    _uCtTreeview.reset(new CtTreeView{_pCtConfig});
    _scrolledwindowTree.add(*_uCtTreeview);
    _uCtTreeview->show();

    _uCtTreestore.reset(new CtTreeStore{this});
    _uCtTreestore->tree_view_connect(_uCtTreeview.get());
    _uCtTreeview->set_tree_node_name_wrap_width(_pCtConfig->cherryWrapEnabled, _pCtConfig->cherryWrapWidth);
    _uCtTreeview->get_column(CtTreeView::AUX_ICON_COL_NUM)->set_visible(!_pCtConfig->auxIconHide);
    show_hide_tree_lines(_pCtConfig->treeLinesVisible);

    _tree_just_auto_expanded = false;
    _uCtTreeview->signal_cursor_changed().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_cursor_changed));
    _uCtTreeview->signal_button_release_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_button_release_event));
    _uCtTreeview->signal_event_after().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_event_after));
    _uCtTreeview->signal_row_activated().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_row_activated));
    _uCtTreeview->signal_test_collapse_row().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_test_collapse_row));
    _uCtTreeview->signal_key_press_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_key_press_event), false);
    _uCtTreeview->signal_scroll_event().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_scroll_event));
    _uCtTreeview->signal_popup_menu().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_popup_menu));

    _uCtTreeview->drag_source_set(std::vector<Gtk::TargetEntry>{Gtk::TargetEntry{"CT_DND", Gtk::TARGET_SAME_WIDGET, 0}},
                                  Gdk::BUTTON1_MASK,
                                  Gdk::ACTION_MOVE);
    _uCtTreeview->drag_dest_set(std::vector<Gtk::TargetEntry>{Gtk::TargetEntry{"CT_DND", Gtk::TARGET_SAME_WIDGET, 0}},
                                Gtk::DEST_DEFAULT_ALL,
                                Gdk::ACTION_MOVE);
    _uCtTreeview->signal_drag_motion().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_drag_motion));
    _uCtTreeview->signal_drag_data_received().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_drag_data_received));
    _uCtTreeview->signal_drag_data_get().connect(sigc::mem_fun(*this, &CtMainWin::_on_treeview_drag_data_get));

    _uCtTreeview->get_style_context()->add_class("ct-tree-panel");
    _uCtTreeview->set_margin_bottom(10);  // so horiz scroll doens't prevent to select the bottom element
}

void CtMainWin::config_apply()
{
    move(_pCtConfig->winRect[0], _pCtConfig->winRect[1]);
    set_default_size(_pCtConfig->winRect[2], _pCtConfig->winRect[3]);
    if (_pCtConfig->winIsMaximised) {
        maximize();
    }

    show_hide_tree_view(_pCtConfig->treeVisible);
    (void)show_hide_vte_cmd_passed_as_first_in_session(_pCtConfig->vteVisible, nullptr/*first_cmd_passed*/);
    show_hide_menubar(_pCtConfig->menubarVisible);
    show_hide_win_header(_pCtConfig->showNodeNameHeader);
    _ctWinHeader.lockIcon.hide();
    _ctWinHeader.bookmarkIcon.hide();
    _ctWinHeader.ghostIcon.hide();

    menu_rebuild_toolbars(false);
    show_hide_statusbar(_pCtConfig->statusbarVisible);

    _ctStatusBar.progressBar.hide();
    _ctStatusBar.stopButton.hide();

    menu_set_visible_exit_app(_pCtConfig->systrayOn);

    _ctTextview.set_show_line_numbers(_pCtConfig->showLineNumbers);
    _ctTextview.set_insert_spaces_instead_of_tabs(_pCtConfig->spacesInsteadTabs);
    _ctTextview.set_tab_width(_pCtConfig->tabsWidth);
    _ctTextview.set_indent(_pCtConfig->wrappingIndent);
    _ctTextview.set_pixels_above_lines(_pCtConfig->spaceAroundLines);
    _ctTextview.set_pixels_below_lines(_pCtConfig->spaceAroundLines);
    _ctTextview.set_pixels_inside_wrap(_pCtConfig->spaceAroundLines, _pCtConfig->relativeWrappedSpace);
    _ctTextview.set_wrap_mode(_pCtConfig->lineWrapping ? Gtk::WrapMode::WRAP_WORD_CHAR : Gtk::WrapMode::WRAP_NONE);

    if (2 != _pCtConfig->cursorBlink) {
        Gtk::Settings::get_default()->property_gtk_cursor_blink() = _pCtConfig->cursorBlink;
    }
    if (2 != _pCtConfig->overlayScroll) {
//        Gtk::Settings::get_default()->property_gtk_overlay_scrolling() = _pCtConfig->overlayScroll;
        _scrolledwindowText.set_overlay_scrolling(static_cast<bool>(_pCtConfig->overlayScroll));
    }
    update_theme();
}

void CtMainWin::config_update_data_from_curr_status()
{
    _ensure_curr_doc_in_recent_docs();
    _ctTextview.synch_spell_check_change_from_gspell_right_click_menu();
}

void CtMainWin::update_theme()
{
    auto font_to_string = [](const Pango::FontDescription& font, const Glib::ustring& fallbackFont)->std::string{
        // adds fallback font on Win32; on Linux, fonts work ok without explicit fallback
#ifdef _WIN32
        return " { font-family: \"" + Glib::locale_from_utf8(font.get_family()) + "\",\"" + fallbackFont +  "\""
                    "; font-size: " + std::to_string(font.get_size()/Pango::SCALE) + "pt; } ";
#else
        (void)fallbackFont; // to silence the warning
        return std::string{" { font-family: "} + Glib::locale_from_utf8(font.get_family()) +
                 "; font-size: " + std::to_string(font.get_size()/Pango::SCALE) + "pt; } ";
#endif
    };

    std::string rtFont = font_to_string(Pango::FontDescription(_pCtConfig->rtFont), _pCtConfig->fallbackFontFamily);
    std::string plFont = font_to_string(Pango::FontDescription(_pCtConfig->ptFont), _pCtConfig->fallbackFontFamily);
    std::string codeFont = font_to_string(Pango::FontDescription(_pCtConfig->codeFont), "monospace");
    std::string treeFont = font_to_string(Pango::FontDescription(_pCtConfig->treeFont), _pCtConfig->fallbackFontFamily);

    std::string css_str;
    css_str.reserve(1100);
    css_str += ".ct-view-panel.ct-view-rich-text" + rtFont;
    css_str += ".ct-view-panel.ct-view-plain-text" + plFont;
    css_str += ".ct-view-panel.ct-view-code" + codeFont;
    if (get_ct_config()->scrollBeyondLastLine) {
        css_str += ".ct-view-panel { padding-bottom: 400px } ";
    }
    css_str += ".ct-cboxtoolbar { background-color: transparent; } ";
    css_str += ".ct-codebox.ct-view-plain-text" + plFont;
    css_str += ".ct-codebox.ct-view-code" + codeFont;
    css_str += ".ct-tree-panel" + treeFont;
    css_str += ".ct-table-light" + rtFont;
    css_str += " ";
    css_str += ".ct-tree-panel { color: " + _pCtConfig->ttDefFg + "; background-color: " + _pCtConfig->ttDefBg + "; } ";
    css_str += ".ct-tree-panel:selected { color: " + _pCtConfig->ttSelFg + "; background: " + _pCtConfig->ttSelBg + "; } ";
    css_str += ".ct-tree-scroll-panel { background-color: " + _pCtConfig->ttDefBg + "; } ";
    css_str += ".ct-header-panel { background-color: " + _pCtConfig->ttDefBg + "; } ";
    css_str += ".ct-header-panel button { margin: 2px; padding: 0 4px 0 4px; } ";
    css_str += ".ct-status-bar bar { margin: 0px; } ";
#if defined(_WIN32)
    // without this the progress bar height is 1 or 2 px, hardly visible (#2373)
    css_str += ".ct-status-bar progressbar trough, progressbar progress { min-height: 16px; } ";
#endif // _WIN32
    if (_pCtConfig->scrollSliderMin) {
        // scrollbar too thin (#2427)
        css_str += "scrollbar slider { " + fmt::format("min-width: {0}px; min-height: {0}px;", _pCtConfig->scrollSliderMin) + " } ";
    }
    css_str += ".ct-table-header-cell { font-weight: bold; } ";
    css_str += ".ct-table grid { background: #cccccc; border-style:solid; border-width: 1px; border-color: gray; } ";
    css_str += "toolbar { padding: 2px 2px 2px 2px; } ";
    css_str += "toolbar button { padding: 0px; } ";
    css_str += "textview border { background-color: transparent; } "; // Loss of transparency with PNGs (#1402, #2132)
    //printf("css_str_len=%zu\n", css_str.size());

    if (_css_provider_theme) {
        Gtk::StyleContext::remove_provider_for_screen(get_screen(), _css_provider_theme);
    }
    _css_provider_theme = Gtk::CssProvider::create();
    gtk_css_provider_load_from_data(_css_provider_theme->gobj_copy(), css_str.c_str(), css_str.size(), NULL);
    // _css_provider_theme->load_from_data(theme_css); second call of load_from_data erases css from the first call on mac
    get_style_context()->add_provider_for_screen(get_screen(), _css_provider_theme, GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}

Gtk::HBox& CtMainWin::_init_status_bar()
{
    _ctStatusBar.statusId = _ctStatusBar.statusBar.get_context_id("");
    _ctStatusBar.frame.set_shadow_type(Gtk::SHADOW_NONE);
    _ctStatusBar.frame.add(_ctStatusBar.progressBar);
    _ctStatusBar.stopButton.set_image_from_icon_name("ct_stop", Gtk::ICON_SIZE_MENU);
    _ctStatusBar.hbox.pack_start(_ctStatusBar.statusBar, true, true);
    _ctStatusBar.hbox.pack_start(_ctStatusBar.frame, false, true);
    _ctStatusBar.hbox.pack_start(_ctStatusBar.stopButton, false, true);

    _ctStatusBar.hbox.get_style_context()->add_class("ct-status-bar");
    // todo: move to css
    _ctStatusBar.frame.set_border_width(1);
    _ctStatusBar.statusBar.set_margin_top(0);
    _ctStatusBar.statusBar.set_margin_bottom(0);
    ((Gtk::Frame*)_ctStatusBar.statusBar.get_children()[0])->get_child()->set_margin_top(1);
    ((Gtk::Frame*)_ctStatusBar.statusBar.get_children()[0])->get_child()->set_margin_bottom(1);
    _ctStatusBar.hbox.set_border_width(0);

    _ctStatusBar.stopButton.signal_clicked().connect([this](){
        _ctStatusBar.set_progress_stop(true);
        _ctStatusBar.stopButton.hide();
    });
    _ctStatusBar.set_progress_stop(false);
    return _ctStatusBar.hbox;
}

Gtk::EventBox& CtMainWin::_init_window_header()
{
    _ctWinHeader.nameLabel.set_padding(10, 0);
    _ctWinHeader.nameLabel.set_ellipsize(Pango::EllipsizeMode::ELLIPSIZE_MIDDLE);
    _ctWinHeader.lockIcon.set_from_icon_name("ct_locked", Gtk::ICON_SIZE_MENU);
    _ctWinHeader.lockIcon.hide();
    _ctWinHeader.bookmarkIcon.set_from_icon_name("ct_pin", Gtk::ICON_SIZE_MENU);
    _ctWinHeader.bookmarkIcon.hide();
    _ctWinHeader.ghostIcon.set_from_icon_name("ct_ghost", Gtk::ICON_SIZE_MENU);
    _ctWinHeader.ghostIcon.hide();
    _ctWinHeader.headerBox.pack_start(_ctWinHeader.buttonBox, false, false);
    _ctWinHeader.headerBox.pack_start(_ctWinHeader.nameLabel, true, true);
    _ctWinHeader.headerBox.pack_start(_ctWinHeader.lockIcon, false, false);
    _ctWinHeader.headerBox.pack_start(_ctWinHeader.bookmarkIcon, false, false);
    _ctWinHeader.headerBox.pack_start(_ctWinHeader.ghostIcon, false, false);
    _ctWinHeader.eventBox.add(_ctWinHeader.headerBox);
    _ctWinHeader.eventBox.get_style_context()->add_class("ct-header-panel");
    return _ctWinHeader.eventBox;
}

void CtMainWin::window_header_update()
{
    if (_no_gui) return;

    // based on update_node_name_header
    std::string name = _pCtConfig->nodeNameHeaderShowFullPath ?
        CtMiscUtil::get_node_hierarchical_name(curr_tree_iter(), " / ", false).c_str() : curr_tree_iter().get_node_name().c_str();
    std::string foreground = curr_tree_iter().get_node_foreground();
    foreground = foreground.empty() ? _pCtConfig->ttDefFg : foreground;
    _ctWinHeader.nameLabel.set_markup(
        "<span foreground=\"" + foreground + "\" font_desc=\"" + _pCtConfig->treeFont + "\" font_weight=\"bold\">" + str::xml_escape(name) + "</span>");

    // update last visited buttons
    if (_pCtConfig->nodesOnNodeNameHeader == 0) {
        for (auto button: _ctWinHeader.buttonBox.get_children()) {
            _ctWinHeader.buttonBox.remove(*button);
        }
    }
    else {
        // add more buttons if that is needed
        while ((int)_ctWinHeader.buttonBox.get_children().size() < _pCtConfig->nodesOnNodeNameHeader) {
            Gtk::Button* button = Gtk::manage(new Gtk::Button(""));
            auto click = [this](Gtk::Button* button) {
                auto node_id = _ctWinHeader.button_to_node_id.find(button);
                if (node_id != _ctWinHeader.button_to_node_id.end()) {
                    if (CtTreeIter tree_iter = get_tree_store().get_node_from_node_id(node_id->second))
                        _uCtTreeview->set_cursor_safe(tree_iter);
                    _ctTextview.grab_focus();
                }
            };
            button->signal_clicked().connect(sigc::bind(click, button));
            _ctWinHeader.buttonBox.add(*button);
        }

        // update button labels and node_ids
        gint64 curr_node = curr_tree_iter().get_node_id();
        int button_idx = 0;
        auto buttons = _ctWinHeader.buttonBox.get_children();
        auto nodes = _ctStateMachine.get_visited_nodes_list();
        _ctWinHeader.button_to_node_id.clear();
        for (auto iter = nodes.rbegin(); iter != nodes.rend(); ++iter) {
            if (*iter == curr_node) continue;
            if (CtTreeIter node = get_tree_store().get_node_from_node_id(*iter)) {
                Glib::ustring name = "<span font_desc=\"" + _pCtConfig->treeFont + "\">" + str::xml_escape(node.get_node_name()) + "</span>";
                Glib::ustring tooltip = CtMiscUtil::get_node_hierarchical_name(node, "/", false);
                if (auto button = dynamic_cast<Gtk::Button*>(buttons[button_idx])) {
                    if (auto label = dynamic_cast<Gtk::Label*>(button->get_child())) {
                        label->set_label(name);
                        label->set_use_markup(true);
                        label->set_ellipsize(Pango::ELLIPSIZE_END);
                    }
                    button->set_tooltip_text(tooltip);
                    button->show();
                    _ctWinHeader.button_to_node_id[button] = *iter;
                }
                ++button_idx;
                if (button_idx == (int)buttons.size())
                    break;
            }
        }
        for (int i = button_idx; i < (int)buttons.size(); ++i) {
            buttons[i]->hide();
        }
    }
}

void CtMainWin::window_header_update_lock_icon(const bool show)
{
    _ctWinHeader.lockIcon.set_visible(show);
}

void CtMainWin::window_header_update_ghost_icon(const bool show)
{
    _ctWinHeader.ghostIcon.set_visible(show);
}

void CtMainWin::window_header_update_bookmark_icon(const bool show)
{
    _ctWinHeader.bookmarkIcon.set_visible(show);
}

void CtMainWin::menu_top_optional_bookmarks_enforce()
{
    auto pBookmarksMenu = dynamic_cast<Gtk::Widget*>(_pBookmarksSubmenus[2]);
    if (pBookmarksMenu) {
        pBookmarksMenu->set_visible(_pCtConfig->bookmarksInTopMenu);
    }
}

void CtMainWin::menu_update_bookmark_menu_item(bool is_bookmarked)
{
    _uCtMenu->find_action("node_bookmark")->signal_set_visible.emit(not is_bookmarked);
    _uCtMenu->find_action("node_unbookmark")->signal_set_visible.emit(is_bookmarked);
}

void CtMainWin::menu_set_bookmark_menu_items()
{
    std::list<std::tuple<gint64, Glib::ustring, const char*>> bookmarks;
    for (const gint64& node_id : _uCtTreestore->bookmarks_get()) {
        CtTreeIter ct_tree_iter = _uCtTreestore->get_node_from_node_id(node_id);
        bookmarks.push_back(std::make_tuple(node_id,
            ct_tree_iter.get_node_name(),
            _uCtTreestore->get_node_icon(_uCtTreestore->get_store()->iter_depth(ct_tree_iter),
                ct_tree_iter.get_node_syntax_highlighting(),
                ct_tree_iter.get_node_custom_icon_id())));
    }

    sigc::slot<void, gint64> bookmark_action = [&](gint64 node_id) {
        CtTreeIter tree_iter = _uCtTreestore->get_node_from_node_id(node_id);
        if (tree_iter) {
            _uCtTreeview->set_cursor_safe(tree_iter);
        }
    };
    for (unsigned i = 0; i < _pBookmarksSubmenus.size(); ++i) {
        if (_pBookmarksSubmenus[i]) {
            _pBookmarksSubmenus[i]->set_submenu(*_uCtMenu->build_bookmarks_menu(bookmarks, bookmark_action, 2 == i/*isTopMenu*/));
        }
    }
}

void CtMainWin::menu_set_items_recent_documents()
{
    if (not _pCtConfig->rememberRecentDocs) {
        return;
    }
    sigc::slot<void, const std::string&> recent_doc_open_action = [&](const std::string& filepath){
        if (Glib::file_test(filepath, Glib::FILE_TEST_EXISTS)) {
            if (file_open(filepath, ""/*node*/, ""/*anchor*/)) {
                _pCtConfig->recentDocsFilepaths.move_or_push_front(fs_canonicalize_filename(filepath));
                menu_set_items_recent_documents();
            }
        }
        else {
            g_autofree gchar* title = g_strdup_printf(_("The Path %s does Not Exist"), str::xml_escape(filepath).c_str());
            CtDialogs::error_dialog(Glib::ustring{title}, *this);
            _pCtConfig->recentDocsFilepaths.move_or_push_back(fs_canonicalize_filename(filepath));
            menu_set_items_recent_documents();
        }
    };
    sigc::slot<void, const std::string&> recent_doc_rm_action = [&](const std::string& filepath){
        _pCtConfig->recentDocsFilepaths.remove(filepath);
        menu_set_items_recent_documents();
    };
    if (_pRecentDocsSubmenu) {
        Gtk::Menu* pMenu = _pRecentDocsSubmenu->get_submenu();
        delete pMenu;
        _pRecentDocsSubmenu->set_submenu(*_uCtMenu->build_recent_docs_menu(_pCtConfig->recentDocsFilepaths,
                                                                           recent_doc_open_action,
                                                                           recent_doc_rm_action));
    }
    if (_pRecentDocsMenuToolButton) {
        _pRecentDocsMenuToolButton->set_arrow_tooltip_text(_("Open a Recent CherryTree Document"));
        Gtk::Menu* pMenu = _pRecentDocsMenuToolButton->get_menu();
        delete pMenu;
        _pRecentDocsMenuToolButton->set_menu(*_uCtMenu->build_recent_docs_menu(_pCtConfig->recentDocsFilepaths,
                                                                               recent_doc_open_action,
                                                                               recent_doc_rm_action));
    }
}

void CtMainWin::menu_set_visible_exit_app(bool visible)
{
    if (auto quit_label = CtMenu::get_accel_label(CtMenu::find_menu_item(_pMenuBar, "quit_app"))) {
        quit_label->set_label(visible ? _("_Hide") : _("_Quit"));
        quit_label->set_tooltip_markup(visible ?  _("Hide the Window") : _("Quit the Application"));
    }
    CtMenu::find_menu_item(_pMenuBar, "exit_app")->set_visible(visible);
}

void CtMainWin::menu_rebuild_toolbars(bool new_toolbar)
{
    if (new_toolbar) {
        _pRecentDocsMenuToolButton = nullptr;
        _pSaveToolButton = nullptr;
        for (auto pToolbar : _pToolbars) {
            _vboxMain.remove(*pToolbar);
        }
        _pToolbars = _uCtMenu->build_toolbars(_pRecentDocsMenuToolButton, _pSaveToolButton);
        for (auto toolbar = _pToolbars.rbegin(); toolbar != _pToolbars.rend(); ++toolbar) {
            _vboxMain.pack_start(*(*toolbar), false, false);
            if (not _pCtConfig->menubarInTitlebar) {
                _vboxMain.reorder_child(*(*toolbar), 1);
            }
            else {
                _vboxMain.reorder_child(*(*toolbar), 0);
            }
        }
        menu_set_items_recent_documents();
        window_title_update(); // this is to restore correct sensitive status of save icon
        for (auto pToolbar : _pToolbars) {
            pToolbar->show_all();
        }
    }

    show_hide_toolbars(_pCtConfig->toolbarVisible);
    for (auto pToolbar : _pToolbars) {
        pToolbar->set_toolbar_style(Gtk::ToolbarStyle::TOOLBAR_ICONS);
    }
    set_toolbars_icon_size(_pCtConfig->toolbarIconSize);
}

void CtMainWin::config_switch_tree_side()
{
    auto tree_width = _scrolledwindowTree.get_width();
    auto text_width = _vboxText.get_width();

    _hPaned.remove(_scrolledwindowTree);
    _hPaned.remove(_vboxText);
    if (_pCtConfig->treeRightSide) {
        _hPaned.pack1(_vboxText, Gtk::EXPAND);
        _hPaned.pack2(_scrolledwindowTree, Gtk::FILL);
        _hPaned.property_position() = text_width;
    }
    else {
        _hPaned.pack1(_scrolledwindowTree, Gtk::FILL);
        _hPaned.pack2(_vboxText, Gtk::EXPAND);
        _hPaned.property_position() = tree_width;
    }
    _pCtConfig->hpanedPos = _hPaned.property_position();
}

void CtMainWin::_zoom_tree(bool is_increase)
{
    Glib::RefPtr<Gtk::StyleContext> context = _uCtTreeview->get_style_context();
    const Pango::FontDescription fontDesc = context->get_font(context->get_state());
    int size = fontDesc.get_size() / Pango::SCALE + (is_increase ? 1 : -1);
    if (size < 6) size = 6;
    _pCtConfig->treeFont = CtFontUtil::get_font_str(CtFontUtil::get_font_family(_pCtConfig->treeFont), size);
    signal_app_apply_for_each_window([](CtMainWin* win) { win->update_theme(); win->window_header_update(); });
}

void CtMainWin::reset()
{
    auto on_scope_exit = scope_guard([&](void*) { user_active() = true; });
    user_active() = false;

    _ctStateMachine.reset();

    _uCtStorage.reset(CtStorageControl::create_dummy_storage(this));

    _reset_CtTreestore_CtTreeview();

    _latestStatusbarUpdateTime.clear();
    for (auto button: _ctWinHeader.buttonBox.get_children()) {
        button->hide();
    }
    _ctWinHeader.nameLabel.set_markup("");
    window_header_update_lock_icon(false);
    window_header_update_ghost_icon(false);
    window_header_update_bookmark_icon(false);
    menu_set_bookmark_menu_items();
    _uCtMenu->find_action("ct_vacuum")->signal_set_visible.emit(false);
    menu_top_optional_bookmarks_enforce();

    update_window_save_not_needed();
    _ctTextview.set_buffer(Glib::RefPtr<Gtk::TextBuffer>{});
    _ctTextview.set_spell_check(false);
    if (not _no_gui) {
        _ctTextview.set_sensitive(false);
    }
}

void CtMainWin::update_selected_node_statusbar_info()
{
    CtTreeIter treeIter = curr_tree_iter();
    Glib::ustring statusbar_text;
    if (not treeIter) {
        statusbar_text = _("No Node is Selected");
    }
    else {
        const std::string separator_text{"  -  "};
        statusbar_text = Glib::ustring{_("Node Type")} + _(": ");
        const std::string syntaxHighl = treeIter.get_node_syntax_highlighting();
        if (CtConst::RICH_TEXT_ID == syntaxHighl) {
            statusbar_text += _("Rich Text");
        }
        else if (CtConst::PLAIN_TEXT_ID == syntaxHighl) {
            statusbar_text += _("Plain Text");
        }
        else {
            statusbar_text += syntaxHighl;
        }
        if (not treeIter.get_node_tags().empty()) {
            statusbar_text += separator_text + _("Tags") + _(": ") + treeIter.get_node_tags();
        }
        if (_pCtConfig->enableSpellCheck && curr_tree_iter().get_node_is_text()) {
            statusbar_text += separator_text + _("Spell Check") + _(": ") + _pCtConfig->spellCheckLang;
        }
        if (_pCtConfig->wordCountOn) {
            statusbar_text += separator_text + _("Word Count") + _(": ") + std::to_string(CtTextIterUtil::get_words_count(_ctTextview.get_buffer()));
        }
        if (treeIter.get_node_creating_time() > 0) {
            const Glib::ustring timestamp_creation = str::time_format(_pCtConfig->timestampFormat, treeIter.get_node_creating_time());
            statusbar_text += separator_text + _("Date Created") + _(": ") + timestamp_creation;
        }
        if (treeIter.get_node_modification_time() > 0) {
            const Glib::ustring timestamp_lastsave = str::time_format(_pCtConfig->timestampFormat, treeIter.get_node_modification_time());
            statusbar_text += separator_text + _("Date Modified") + _(": ") + timestamp_lastsave;
        }
    }
    _ctStatusBar.update_status(statusbar_text);
}

void CtMainWin::tree_node_paste_from_other_window(CtMainWin* pWinToCopyFrom, gint64 nodeIdToCopyFrom)
{
    if (not pWinToCopyFrom) {
        CtDialogs::warning_dialog(_("No Previous Node Copy Was Performed During This Session or the Source Tree is No Longer Available."), *this);
        return;
    }
    CtTreeStore& other_ct_tree_store = pWinToCopyFrom->get_tree_store();
    CtTreeIter   other_ct_tree_iter = other_ct_tree_store.get_node_from_node_id(nodeIdToCopyFrom);
    if (not other_ct_tree_iter) {
        CtDialogs::warning_dialog(_("The Source Tree Node is No Longer Available."), *this);
        return;
    }
    _uCtActions->node_subnodes_paste2(other_ct_tree_iter, pWinToCopyFrom);
}
