Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 994 insertions, 0 deletions

diff --git a/src/ui/dialog/dialog-notebook.cpp b/src/ui/dialog/dialog-notebook.cpp
new file mode 100644
index 0000000..babcd2d
--- /dev/null
+++ b/src/ui/dialog/dialog-notebook.cpp
@@ -0,0 +1,994 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/** @file
+ * @brief A wrapper for Gtk::Notebook.
+ *
+ * Authors: see git history
+ *   Tavmjong Bah
+ *
+ * Copyright (c) 2018 Tavmjong Bah, Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "dialog-notebook.h"
+
+#include <vector>
+#include <glibmm/i18n.h>
+#include <gtkmm/eventbox.h>
+#include <gtkmm/scrollbar.h>
+#include <gtkmm/separatormenuitem.h>
+#include <gtkmm/menu.h>
+
+#include "enums.h"
+#include "inkscape.h"
+#include "inkscape-window.h"
+#include "ui/dialog/dialog-base.h"
+#include "ui/dialog/dialog-data.h"
+#include "ui/dialog/dialog-container.h"
+#include "ui/dialog/dialog-multipaned.h"
+#include "ui/dialog/dialog-window.h"
+#include "ui/icon-loader.h"
+#include "ui/util.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Dialog {
+
+std::list<DialogNotebook *> DialogNotebook::_instances;
+
+/**
+ * DialogNotebook constructor.
+ *
+ * @param container the parent DialogContainer of the notebook.
+ */
+DialogNotebook::DialogNotebook(DialogContainer *container)
+    : Gtk::ScrolledWindow()
+    , _container(container)
+    , _labels_auto(true)
+    , _detaching_duplicate(false)
+    , _selected_page(nullptr)
+    , _label_visible(true)
+{
+    set_name("DialogNotebook");
+    set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_NEVER);
+    set_shadow_type(Gtk::SHADOW_NONE);
+    set_vexpand(true);
+    set_hexpand(true);
+
+    // =========== Getting preferences ==========
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    if (prefs == nullptr) {
+        return;
+    }
+    gint labelstautus = prefs->getInt("/options/notebooklabels/value", PREFS_NOTEBOOK_LABELS_AUTO);
+    _labels_auto = labelstautus == PREFS_NOTEBOOK_LABELS_AUTO;
+    _labels_off = labelstautus == PREFS_NOTEBOOK_LABELS_OFF;
+
+    // ============= Notebook menu ==============
+    _notebook.set_name("DockedDialogNotebook");
+    _notebook.set_show_border(false);
+    _notebook.set_group_name("InkscapeDialogGroup");
+    _notebook.set_scrollable(true);
+
+    Gtk::MenuItem *new_menu_item = nullptr;
+
+    int row = 0;
+    // Close tab
+    new_menu_item = Gtk::manage(new Gtk::MenuItem(_("Close Current Tab")));
+    _conn.emplace_back(
+        new_menu_item->signal_activate().connect(sigc::mem_fun(*this, &DialogNotebook::close_tab_callback)));
+    _menu.attach(*new_menu_item, 0, 2, row, row + 1);
+    row++;
+
+    // Close notebook
+    new_menu_item = Gtk::manage(new Gtk::MenuItem(_("Close Panel")));
+    _conn.emplace_back(
+        new_menu_item->signal_activate().connect(sigc::mem_fun(*this, &DialogNotebook::close_notebook_callback)));
+    _menu.attach(*new_menu_item, 0, 2, row, row + 1);
+    row++;
+
+    // Move to new window
+    new_menu_item = Gtk::manage(new Gtk::MenuItem(_("Move Tab to New Window")));
+    _conn.emplace_back(
+        new_menu_item->signal_activate().connect([=]() { pop_tab_callback(); }));
+    _menu.attach(*new_menu_item, 0, 2, row, row + 1);
+    row++;
+
+    // Separator menu item
+    // new_menu_item = Gtk::manage(new Gtk::SeparatorMenuItem());
+    // _menu.attach(*new_menu_item, 0, 2, row, row + 1);
+    // row++;
+
+    struct Dialog {
+        Glib::ustring key;
+        Glib::ustring label;
+        Glib::ustring order;
+        Glib::ustring icon_name;
+        DialogData::Category category;
+        ScrollProvider provide_scroll;
+    };
+    std::vector<Dialog> all_dialogs;
+    auto const &dialog_data = get_dialog_data();
+    all_dialogs.reserve(dialog_data.size());
+    for (auto&& kv : dialog_data) {
+        const auto& key = kv.first;
+        const auto& data = kv.second;
+        if (data.category == DialogData::Other) {
+            continue;
+        }
+        // for sorting dialogs alphabetically, remove '_' (used for accelerators)
+        Glib::ustring order = data.label; // Already translated
+        auto underscore = order.find('_');
+        if (underscore != Glib::ustring::npos) {
+            order = order.erase(underscore, 1);
+        }
+        all_dialogs.emplace_back(Dialog {
+                                     .key = key,
+                                     .label = data.label,
+                                     .order = order,
+                                     .icon_name = data.icon_name,
+                                     .category = data.category,
+                                     .provide_scroll = data.provide_scroll
+                                 });
+    }
+    // sort by categories and then by names
+    std::sort(all_dialogs.begin(), all_dialogs.end(), [](const Dialog& a, const Dialog& b){
+        if (a.category != b.category) return a.category < b.category;
+        return a.order < b.order;
+    });
+
+    int col = 0;
+    DialogData::Category category = DialogData::Other;
+    for (auto&& data : all_dialogs) {
+        if (data.category != category) {
+            if (col > 0) row++;
+
+            auto separator = Gtk::make_managed<Gtk::SeparatorMenuItem>();
+            _menu.attach(*separator, 0, 2, row, row + 1);
+            row++;
+
+            category = data.category;
+            auto sep = Gtk::make_managed<Gtk::MenuItem>();
+            sep->set_label(Glib::ustring(gettext(dialog_categories[category])).uppercase());
+            sep->get_style_context()->add_class("menu-category");
+            sep->set_sensitive(false);
+            _menu.attach(*sep, 0, 2, row, row + 1);
+            col = 0;
+            row++;
+        }
+        auto key = data.key;
+        auto dlg = Gtk::make_managed<Gtk::MenuItem>();
+        auto box = Gtk::make_managed<Gtk::Box>(Gtk::ORIENTATION_HORIZONTAL, 8);
+        box->pack_start(*Gtk::make_managed<Gtk::Image>(data.icon_name, Gtk::ICON_SIZE_MENU), false, true);
+        box->pack_start(*Gtk::make_managed<Gtk::Label>(data.label, Gtk::ALIGN_START, Gtk::ALIGN_CENTER, true), false, true);
+        dlg->add(*box);
+        dlg->signal_activate().connect([=](){
+            // get desktop's container, it may be different than current '_container'!
+            if (auto desktop = SP_ACTIVE_DESKTOP) {
+                if (auto container = desktop->getContainer()) {
+                    container->new_dialog(key);
+                }
+            }
+        });
+        _menu.attach(*dlg, col, col + 1, row, row + 1);
+        col++;
+        if (col > 1) {
+            col = 0;
+            row++;
+        }
+    }
+    if (prefs->getBool("/theme/symbolicIcons", true)) {
+        _menu.get_style_context()->add_class("symbolic");
+    }
+
+    _menu.show_all_children();
+
+    Gtk::Button* menubtn = Gtk::manage(new Gtk::Button());
+    menubtn->set_image_from_icon_name("go-down-symbolic");
+    menubtn->signal_clicked().connect([=](){ _menu.popup_at_widget(menubtn, Gdk::GRAVITY_SOUTH, Gdk::GRAVITY_NORTH, nullptr); });
+    _notebook.set_action_widget(menubtn, Gtk::PACK_END);
+    menubtn->show();
+    menubtn->set_relief(Gtk::RELIEF_NORMAL);
+    menubtn->set_valign(Gtk::ALIGN_CENTER);
+    menubtn->set_halign(Gtk::ALIGN_CENTER);
+    menubtn->set_can_focus(false);
+    menubtn->set_name("DialogMenuButton");
+
+    // =============== Signals ==================
+    _conn.emplace_back(signal_size_allocate().connect(sigc::mem_fun(*this, &DialogNotebook::on_size_allocate_scroll)));
+    _conn.emplace_back(_notebook.signal_drag_begin().connect(sigc::mem_fun(*this, &DialogNotebook::on_drag_begin)));
+    _conn.emplace_back(_notebook.signal_drag_end().connect(sigc::mem_fun(*this, &DialogNotebook::on_drag_end)));
+    _conn.emplace_back(_notebook.signal_page_added().connect(sigc::mem_fun(*this, &DialogNotebook::on_page_added)));
+    _conn.emplace_back(_notebook.signal_page_removed().connect(sigc::mem_fun(*this, &DialogNotebook::on_page_removed)));
+    _conn.emplace_back(_notebook.signal_switch_page().connect(sigc::mem_fun(*this, &DialogNotebook::on_page_switch)));
+
+    // ============= Finish setup ===============
+    _reload_context = true;
+    add(_notebook);
+    show_all();
+
+    _instances.push_back(this);
+}
+
+DialogNotebook::~DialogNotebook()
+{
+    // disconnect signals first, so no handlers are invoked when removing pages
+    for_each(_conn.begin(), _conn.end(), [&](auto c) { c.disconnect(); });
+    for_each(_connmenu.begin(), _connmenu.end(), [&](auto c) { c.disconnect(); });
+    for_each(_tab_connections.begin(), _tab_connections.end(), [&](auto it) { it.second.disconnect(); });
+
+    // Unlink and remove pages
+    for (int i = _notebook.get_n_pages(); i >= 0; --i) {
+        DialogBase *dialog = dynamic_cast<DialogBase *>(_notebook.get_nth_page(i));
+        _container->unlink_dialog(dialog);
+        _notebook.remove_page(i);
+    }
+
+    _conn.clear();
+    _connmenu.clear();
+    _tab_connections.clear();
+
+    _instances.remove(this);
+}
+
+void DialogNotebook::add_highlight_header()
+{
+    const auto &style = _notebook.get_style_context();
+    style->add_class("nb-highlight");
+}
+
+void DialogNotebook::remove_highlight_header()
+{
+    const auto &style = _notebook.get_style_context();
+    style->remove_class("nb-highlight");
+}
+
+/**
+ * get provide scroll
+ */
+bool 
+DialogNotebook::provide_scroll(Gtk::Widget &page) {
+    auto const &dialog_data = get_dialog_data();
+    auto dialogbase = dynamic_cast<DialogBase*>(&page);
+    if (dialogbase) {
+        auto data = dialog_data.find(dialogbase->get_type());
+        if ((*data).second.provide_scroll == ScrollProvider::PROVIDE) {
+            return true;
+        }
+    }
+    return false;
+}
+
+/**
+ * Set provide scroll
+ */
+Gtk::ScrolledWindow *
+DialogNotebook::get_current_scrolledwindow(bool skip_scroll_provider) {
+
+    gint pagenum = _notebook.get_current_page();
+    Gtk::Widget *page = _notebook.get_nth_page(pagenum);
+    if (page) {
+        if (skip_scroll_provider && provide_scroll(*page)) {
+            return nullptr;
+        }
+        auto container = dynamic_cast<Gtk::Container *>(page);
+        if (container) {
+            std::vector<Gtk::Widget *> widgs = container->get_children();
+            if (widgs.size()) {
+                auto scrolledwindow = dynamic_cast<Gtk::ScrolledWindow *>(widgs[0]);
+                if (scrolledwindow) {
+                    return scrolledwindow;
+                }
+            }
+        }
+    }
+    return nullptr;
+}
+
+/**
+ * Adds a widget as a new page with a tab.
+ */
+void DialogNotebook::add_page(Gtk::Widget &page, Gtk::Widget &tab, Glib::ustring)
+{
+    _reload_context = true;
+    page.set_vexpand();
+
+    auto container = dynamic_cast<Gtk::Box *>(&page);
+    if (container) {
+        auto *wrapper = Gtk::manage(new Gtk::ScrolledWindow());
+        wrapper->set_vexpand(true);
+        wrapper->set_propagate_natural_height(true);
+        wrapper->set_valign(Gtk::ALIGN_FILL);
+        wrapper->set_overlay_scrolling(false);
+        wrapper->set_can_focus(false);
+        wrapper->get_style_context()->add_class("noborder");
+        auto *wrapperbox = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_VERTICAL,0));
+        wrapperbox->set_valign(Gtk::ALIGN_FILL);
+        wrapperbox->set_vexpand(true);
+        std::vector<Gtk::Widget *> widgs = container->get_children();
+        for (auto widg : widgs) {
+            bool expand = container->child_property_expand(*widg);
+            bool fill = container->child_property_fill(*widg);
+            guint padding = container->child_property_expand(*widg);
+            Gtk::PackType pack_type = container->child_property_pack_type(*widg);
+            container->remove(*widg);
+            if (pack_type == Gtk::PACK_START) {
+                wrapperbox->pack_start(*widg, expand, fill, padding);
+            } else {
+                wrapperbox->pack_end  (*widg, expand, fill, padding);
+            }
+        }
+        wrapper->add(*wrapperbox);
+        container->add(*wrapper);
+        if (provide_scroll(page)) {
+            wrapper->set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_EXTERNAL);
+        } else {
+            wrapper->set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
+        }
+    }
+
+    int page_number = _notebook.append_page(page, tab);
+    _notebook.set_tab_reorderable(page);
+    _notebook.set_tab_detachable(page);
+    _notebook.show_all();
+    _notebook.set_current_page(page_number);
+}
+
+/**
+ * Moves a page from a different notebook to this one.
+ */
+void DialogNotebook::move_page(Gtk::Widget &page)
+{
+    // Find old notebook
+    Gtk::Notebook *old_notebook = dynamic_cast<Gtk::Notebook *>(page.get_parent());
+    if (!old_notebook) {
+        std::cerr << "DialogNotebook::move_page: page not in notebook!" << std::endl;
+        return;
+    }
+
+    Gtk::Widget *tab = old_notebook->get_tab_label(page);
+    Glib::ustring text = old_notebook->get_menu_label_text(page);
+
+    // Keep references until re-attachment
+    tab->reference();
+    page.reference();
+
+    old_notebook->detach_tab(page);
+    _notebook.append_page(page, *tab);
+    // Remove unnecessary references
+    tab->unreference();
+    page.unreference();
+
+    // Set default settings for a new page
+    _notebook.set_tab_reorderable(page);
+    _notebook.set_tab_detachable(page);
+    _notebook.show_all();
+    _reload_context = true;
+}
+
+// ============ Notebook callbacks ==============
+
+/**
+ * Callback to close the current active tab.
+ */
+void DialogNotebook::close_tab_callback()
+{
+    int page_number = _notebook.get_current_page();
+
+    if (_selected_page) {
+        page_number = _notebook.page_num(*_selected_page);
+        _selected_page = nullptr;
+    }
+
+    if (dynamic_cast<DialogBase*>(_notebook.get_nth_page(page_number))) {
+        // is this a dialog in a floating window?
+        if (auto window = dynamic_cast<DialogWindow*>(_container->get_toplevel())) {
+            // store state of floating dialog before it gets deleted
+            DialogManager::singleton().store_state(*window);
+        }
+    }
+
+    // Remove page from notebook
+    _notebook.remove_page(page_number);
+
+    // Delete the signal connection
+    remove_close_tab_callback(_selected_page);
+
+    if (_notebook.get_n_pages() == 0) {
+        close_notebook_callback();
+        return;
+    }
+
+    // Update tab labels by comparing the sum of their widths to the allocation
+    Gtk::Allocation allocation = get_allocation();
+    on_size_allocate_scroll(allocation);
+    _reload_context = true;
+}
+
+/**
+ * Shutdown callback - delete the parent DialogMultipaned before destructing.
+ */
+void DialogNotebook::close_notebook_callback()
+{
+    // Search for DialogMultipaned
+    DialogMultipaned *multipaned = dynamic_cast<DialogMultipaned *>(get_parent());
+    if (multipaned) {
+        multipaned->remove(*this);
+    } else if (get_parent()) {
+        std::cerr << "DialogNotebook::close_notebook_callback: Unexpected parent!" << std::endl;
+        get_parent()->remove(*this);
+    }
+    delete this;
+}
+
+/**
+ * Callback to move the current active tab.
+ */
+DialogWindow* DialogNotebook::pop_tab_callback()
+{
+    // Find page.
+    Gtk::Widget *page = _notebook.get_nth_page(_notebook.get_current_page());
+
+    if (_selected_page) {
+        page = _selected_page;
+        _selected_page = nullptr;
+    }
+
+    if (!page) {
+        std::cerr << "DialogNotebook::pop_tab_callback: page not found!" << std::endl;
+        return nullptr;
+    }
+
+    // Move page to notebook in new dialog window (attached to active InkscapeWindow).
+    auto inkscape_window = _container->get_inkscape_window();
+    auto window = new DialogWindow(inkscape_window, page);
+    window->show_all();
+
+    if (_notebook.get_n_pages() == 0) {
+        close_notebook_callback();
+        return window;
+    }
+
+    // Update tab labels by comparing the sum of their widths to the allocation
+    Gtk::Allocation allocation = get_allocation();
+    on_size_allocate_scroll(allocation);
+
+    return window;
+}
+
+// ========= Signal handlers - notebook =========
+
+/**
+ * Signal handler to pop a dragged tab into its own DialogWindow.
+ *
+ * A failed drag means that the page was not dropped on an existing notebook.
+ * Thus create a new window with notebook to move page to.
+ *
+ * BUG: this has inconsistent behavior on Wayland.
+ */
+void DialogNotebook::on_drag_end(const Glib::RefPtr<Gdk::DragContext> &context)
+{
+    // Remove dropzone highlights
+    MyDropZone::remove_highlight_instances();
+    for (auto instance : _instances) {
+        instance->remove_highlight_header();
+    }
+
+    bool set_floating = !context->get_dest_window();
+    if (!set_floating && context->get_dest_window()->get_window_type() == Gdk::WINDOW_FOREIGN) {
+        set_floating = true;
+    }
+
+    if (set_floating) {
+        Gtk::Widget *source = Gtk::Widget::drag_get_source_widget(context);
+
+        // Find source notebook and page
+        Gtk::Notebook *old_notebook = dynamic_cast<Gtk::Notebook *>(source);
+        if (!old_notebook) {
+            std::cerr << "DialogNotebook::on_drag_end: notebook not found!" << std::endl;
+        } else {
+            // Find page
+            Gtk::Widget *page = old_notebook->get_nth_page(old_notebook->get_current_page());
+            if (page) {
+                // Move page to notebook in new dialog window
+
+                auto inkscape_window = _container->get_inkscape_window();
+                auto window = new DialogWindow(inkscape_window, page);
+
+                // Move window to mouse pointer
+                if (auto device = context->get_device()) {
+                    int x = 0, y = 0;
+                    device->get_position(x, y);
+                    window->move(std::max(0, x - 50), std::max(0, y - 50));
+                }
+
+                window->show_all();
+            }
+        }
+    }
+
+    // Closes the notebook if empty.
+    if (_notebook.get_n_pages() == 0) {
+        close_notebook_callback();
+        return;
+    }
+
+    // Update tab labels by comparing the sum of their widths to the allocation
+    Gtk::Allocation allocation = get_allocation();
+    on_size_allocate_scroll(allocation);
+}
+
+void DialogNotebook::on_drag_begin(const Glib::RefPtr<Gdk::DragContext> &context)
+{
+    MyDropZone::add_highlight_instances();
+    for (auto instance : _instances) {
+        instance->add_highlight_header();
+    }
+}
+
+/**
+ * Signal handler to update dialog list when adding a page.
+ */
+void DialogNotebook::on_page_added(Gtk::Widget *page, int page_num)
+{
+    DialogBase *dialog = dynamic_cast<DialogBase *>(page);
+
+    // Does current container/window already have such a dialog?
+    if (dialog && _container->has_dialog_of_type(dialog)) {
+        // We already have a dialog of the same type
+
+        // Highlight first dialog
+        DialogBase *other_dialog = _container->get_dialog(dialog->get_type());
+        other_dialog->blink();
+
+        // Remove page from notebook
+        _detaching_duplicate = true; // HACK: prevent removing the initial dialog of the same type
+        _notebook.detach_tab(*page);
+        return;
+    } else if (dialog) {
+        // We don't have a dialog of this type
+
+        // Add to dialog list
+        _container->link_dialog(dialog);
+    } else {
+        // This is not a dialog
+        return;
+    }
+
+    // add close tab signal
+    add_close_tab_callback(page);
+
+    // Switch tab labels if needed
+    if (!_labels_auto) {
+        toggle_tab_labels_callback(false);
+    }
+
+    // Update tab labels by comparing the sum of their widths to the allocation
+    Gtk::Allocation allocation = get_allocation();
+    on_size_allocate_scroll(allocation);
+}
+
+/**
+ * Signal handler to update dialog list when removing a page.
+ */
+void DialogNotebook::on_page_removed(Gtk::Widget *page, int page_num)
+{
+    /**
+     * When adding a dialog in a notebooks header zone of the same type as an existing one,
+     * we remove it immediately, which triggers a call to this method. We use `_detaching_duplicate`
+     * to prevent reemoving the initial dialog.
+     */
+    if (_detaching_duplicate) {
+        _detaching_duplicate = false;
+        return;
+    }
+
+    // Remove from dialog list
+    DialogBase *dialog = dynamic_cast<DialogBase *>(page);
+    if (dialog) {
+        _container->unlink_dialog(dialog);
+    }
+
+    // remove old close tab signal
+    remove_close_tab_callback(page);
+}
+
+/**
+ * We need to remove the scrollbar to snap a whole DialogNotebook to width 0.
+ *
+ */
+void DialogNotebook::on_size_allocate_scroll(Gtk::Allocation &a)
+{
+    // magic number
+    const int MIN_HEIGHT = 60;
+    //  set or unset scrollbars to completely hide a notebook
+    // because we have a "blocking" scroll per tab we need to loop to aboid
+    // other page stop out scroll
+    for (auto const &page : _notebook.get_children()) {
+        auto *container = dynamic_cast<Gtk::Container *>(page);
+        if (container && !provide_scroll(*page)) {
+            std::vector<Gtk::Widget *> widgs = container->get_children();
+            if (widgs.size()) {
+                auto scrolledwindow = dynamic_cast<Gtk::ScrolledWindow *>(widgs[0]);
+                if (scrolledwindow) {
+                    double height = scrolledwindow->get_allocation().get_height();
+                    if (height > 1) {
+                        Gtk::PolicyType policy = scrolledwindow->property_vscrollbar_policy().get_value();
+                        if (height >= MIN_HEIGHT && policy != Gtk::POLICY_AUTOMATIC) {
+                            scrolledwindow->property_vscrollbar_policy().set_value(Gtk::POLICY_AUTOMATIC);
+                        } else if(height < MIN_HEIGHT && policy != Gtk::POLICY_EXTERNAL) {
+                            scrolledwindow->property_vscrollbar_policy().set_value(Gtk::POLICY_EXTERNAL);
+                        } else {
+                            // we don't need to update; break
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+
+    set_allocation(a);
+    // only update notebook tabs on horizontal changes
+    if (a.get_width() != _prev_alloc_width) {
+        on_size_allocate_notebook(a);
+    }
+}
+
+/**
+ * This function hides the tab labels if necessary (and _labels_auto == true)
+ */
+void DialogNotebook::on_size_allocate_notebook(Gtk::Allocation &a)
+{
+    
+    // we unset scrollable when FULL mode on to prevent overflow with 
+    // container at full size that makes an unmaximized desktop freeze 
+    _notebook.set_scrollable(false);
+    if (!_labels_set_off && !_labels_auto) {
+        toggle_tab_labels_callback(false);
+    }
+    if (!_labels_auto) {
+        return;
+    }
+
+    int alloc_width = get_allocation().get_width();
+    // Don't update on closed dialog container, prevent console errors
+    if (alloc_width < 2) {
+        _notebook.set_scrollable(true);
+        return;
+    }
+    int nat_width = 0;
+    int initial_width = 0;
+    int total_width = 0;
+    _notebook.get_preferred_width(initial_width, nat_width); // get current notebook allocation
+    for (auto const &page : _notebook.get_children()) {
+        Gtk::EventBox *cover = dynamic_cast<Gtk::EventBox *>(_notebook.get_tab_label(*page));
+        if (!cover) {
+            continue;
+        }
+        cover->show_all();
+    }
+    _notebook.get_preferred_width(total_width, nat_width); // get full notebook allocation (all open)
+    prev_tabstatus = tabstatus;
+    if (_single_tab_width != _none_tab_width && 
+        (_none_tab_width && _none_tab_width > alloc_width || 
+        (_single_tab_width > alloc_width && _single_tab_width < total_width)))
+    {
+        tabstatus = TabsStatus::NONE;
+        if (_single_tab_width != initial_width || prev_tabstatus == TabsStatus::NONE) {
+            _none_tab_width = initial_width;
+        }
+    } else {
+        tabstatus = (alloc_width <= total_width) ? TabsStatus::SINGLE : TabsStatus::ALL;
+        if (total_width != initial_width &&
+            prev_tabstatus == TabsStatus::SINGLE && 
+            tabstatus == TabsStatus::SINGLE) 
+        {
+            _single_tab_width = initial_width;
+        }
+    }
+    if ((_single_tab_width && !_none_tab_width) || 
+        (_single_tab_width && _single_tab_width == _none_tab_width)) 
+    {
+        _none_tab_width = _single_tab_width - 1;
+    }    
+     
+    /* 
+    std::cout << "::::::::::tabstatus::" << (int)tabstatus  << std::endl;
+    std::cout << ":::::prev_tabstatus::" << (int)prev_tabstatus << std::endl;
+    std::cout << "::::::::alloc_width::" << alloc_width << std::endl;
+    std::cout << "::_prev_alloc_width::" << _prev_alloc_width << std::endl;
+    std::cout << "::::::initial_width::" << initial_width << std::endl;
+    std::cout << "::::::::::nat_width::" << nat_width << std::endl;
+    std::cout << "::::::::total_width::" << total_width << std::endl;
+    std::cout << "::::_none_tab_width::" << _none_tab_width  << std::endl;
+    std::cout << "::_single_tab_width::" << _single_tab_width  << std::endl;
+    std::cout << ":::::::::::::::::::::" << std::endl;    
+    */
+    
+    _prev_alloc_width = alloc_width;
+    bool show = tabstatus == TabsStatus::ALL;
+    toggle_tab_labels_callback(show);
+}
+
+/**
+ * Signal handler to close a tab when middle-clicking.
+ */
+bool DialogNotebook::on_tab_click_event(GdkEventButton *event, Gtk::Widget *page)
+{
+    if (event->type == GDK_BUTTON_PRESS) {
+        if (event->button == 2) { // Close tab
+            _selected_page = page;
+            close_tab_callback();
+        } else if (event->button == 3) { // Show menu
+            _selected_page = page;
+            reload_tab_menu();
+            _menutabs.popup_at_pointer((GdkEvent *)event);
+        }
+    }
+
+    return false;
+}
+
+void DialogNotebook::on_close_button_click_event(Gtk::Widget *page)
+{
+    _selected_page = page;
+    close_tab_callback();
+}
+
+// ================== Helpers ===================
+
+/**
+ * Reload tab menu
+ */
+void DialogNotebook::reload_tab_menu()
+{
+    if (_reload_context) {
+        _reload_context = false;
+        Gtk::MenuItem* menuitem = nullptr;
+        for_each(_connmenu.begin(), _connmenu.end(), [&](auto c) { c.disconnect(); });
+        _connmenu.clear();
+        for (auto widget : _menutabs.get_children()) {
+            delete widget;
+        }
+        auto prefs = Inkscape::Preferences::get();
+        bool symbolic = false;
+        if (prefs->getBool("/theme/symbolicIcons", false)) {
+            symbolic = true;
+        }
+
+        for (auto const &page : _notebook.get_children()) {
+            Gtk::EventBox *cover = dynamic_cast<Gtk::EventBox *>(_notebook.get_tab_label(*page));
+            if (!cover) {
+                continue;
+            }
+
+            Gtk::Box *box = dynamic_cast<Gtk::Box *>(cover->get_child());
+            
+            if (!box) {
+                continue;
+            }
+            auto childs = box->get_children();
+            if (childs.size() < 2) {
+                continue;
+            }
+            // Create a box to hold icon and label as Gtk::MenuItem derives from GtkBin and can
+            // only hold one child
+            Gtk::Box *boxmenu = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
+            boxmenu->set_halign(Gtk::ALIGN_START);
+            menuitem = Gtk::manage(new Gtk::MenuItem());
+            menuitem->add(*boxmenu);
+
+            Gtk::Label *label = dynamic_cast<Gtk::Label *>(childs[1]);
+            Gtk::Label *labelto = Gtk::manage(new Gtk::Label(label->get_text()));
+            
+            Gtk::Image *icon = dynamic_cast<Gtk::Image *>(childs[0]);
+            if (icon) {
+                int min_width, nat_width;
+                icon->get_preferred_width(min_width, nat_width);
+                _icon_width = min_width;
+                auto name = icon->get_icon_name();
+                if (!name.empty()) {
+                    if (symbolic && name.find("-symbolic") == Glib::ustring::npos) {
+                        name += Glib::ustring("-symbolic");
+                    }
+                    Gtk::Image *iconend  = sp_get_icon_image(name, Gtk::ICON_SIZE_MENU);
+                    boxmenu->pack_start(*iconend, false, false, 0);
+                }
+            }
+            boxmenu->pack_start(*labelto, true,  true,  0);
+            size_t pagenum = _notebook.page_num(*page);
+            _connmenu.emplace_back(
+                menuitem->signal_activate().connect(sigc::bind(sigc::mem_fun(*this, &DialogNotebook::change_page),pagenum)));
+            
+            _menutabs.append(*Gtk::manage(menuitem));
+        }
+    }
+    _menutabs.show_all();
+}
+/**
+ * Callback to toggle all tab labels to the selected state.
+ * @param show: whether you want the labels to show or not
+ */
+void DialogNotebook::toggle_tab_labels_callback(bool show)
+{
+    _label_visible = show;
+    for (auto const &page : _notebook.get_children()) {
+        Gtk::EventBox *cover = dynamic_cast<Gtk::EventBox *>(_notebook.get_tab_label(*page));
+        if (!cover) {
+            continue;
+        }
+
+        Gtk::Box *box = dynamic_cast<Gtk::Box *>(cover->get_child());
+        if (!box) {
+            continue;
+        }
+
+        Gtk::Label *label = dynamic_cast<Gtk::Label *>(box->get_children()[1]);
+        Gtk::Button *close = dynamic_cast<Gtk::Button *>(*box->get_children().rbegin());
+        int n = _notebook.get_current_page();
+        if (close && label) {
+            if (page != _notebook.get_nth_page(n)) {
+                show ? close->show() : close->hide();
+                show ? label->show() : label->hide();
+            } else if (tabstatus == TabsStatus::NONE || _labels_off) {
+                if (page != _notebook.get_nth_page(n)) {
+                    close->hide();
+                } else {
+                    close->show();
+                }
+                label->hide();
+            } else {
+                close->show();
+                label->show();
+            }
+        }
+    }
+    _labels_set_off = _labels_off;
+    if (_prev_alloc_width && prev_tabstatus != tabstatus ) {
+        resize_widget_children(&_notebook);
+    }
+    if (show && _single_tab_width) {
+        _notebook.set_scrollable(true);
+    }
+}
+
+void DialogNotebook::on_page_switch(Gtk::Widget *curr_page, guint)
+{
+    if (auto container = dynamic_cast<Gtk::Container *>(curr_page)) {
+        container->show_all_children();
+    }
+    for (auto const &page : _notebook.get_children()) {
+        auto dialogbase = dynamic_cast<DialogBase*>(page);
+        if (dialogbase) {
+            std::vector<Gtk::Widget *> widgs = dialogbase->get_children();
+            if (widgs.size()) {
+                if (curr_page == page) {
+                    widgs[0]->show_now();
+                } else {
+                    widgs[0]->hide();
+                }
+            }
+            if (_prev_alloc_width) {
+                dialogbase->setShowing(curr_page == page);
+            }
+        }
+        if (_label_visible) {
+            continue;
+        }
+        Gtk::EventBox *cover = dynamic_cast<Gtk::EventBox *>(_notebook.get_tab_label(*page));
+        if (!cover) {
+            continue;
+        }
+
+        if (cover == dynamic_cast<Gtk::EventBox *>(_notebook.get_tab_label(*curr_page))) {
+            Gtk::Box *box = dynamic_cast<Gtk::Box *>(cover->get_child());
+            Gtk::Label *label = dynamic_cast<Gtk::Label *>(box->get_children()[1]);
+            Gtk::Button *close = dynamic_cast<Gtk::Button *>(*box->get_children().rbegin());
+
+            if (label) {
+                if (tabstatus == TabsStatus::NONE) {
+                    label->hide();
+                } else {
+                    label->show();
+                }
+            }
+
+            if (close) {
+                if (tabstatus == TabsStatus::NONE && curr_page != page) {
+                    close->hide();
+                } else {
+                    close->show();
+                }
+            }
+            continue;
+        }
+
+        Gtk::Box *box = dynamic_cast<Gtk::Box *>(cover->get_child());
+        if (!box) {
+            continue;
+        }
+
+        Gtk::Label *label = dynamic_cast<Gtk::Label *>(box->get_children()[1]);
+        Gtk::Button *close = dynamic_cast<Gtk::Button *>(*box->get_children().rbegin());
+
+
+        close->hide();
+        label->hide();
+    }
+    if (_prev_alloc_width) {
+        if (!_label_visible) {
+            queue_allocate(); 
+        }
+        auto window = dynamic_cast<DialogWindow*>(_container->get_toplevel());
+        if (window) {
+            resize_widget_children(window->get_container());
+        } else {
+            if (auto desktop = SP_ACTIVE_DESKTOP) {
+                if (auto container = desktop->getContainer()) {
+                    resize_widget_children(container);
+                }
+            }
+        }
+    }
+}
+
+/**
+ * Helper method that change the page
+ */
+void DialogNotebook::change_page(size_t pagenum)
+{
+    _notebook.set_current_page(pagenum);
+}
+
+/**
+ * Helper method that adds the close tab signal connection for the page given.
+ */
+void DialogNotebook::add_close_tab_callback(Gtk::Widget *page)
+{
+    Gtk::Widget *tab = _notebook.get_tab_label(*page);
+    auto *eventbox = static_cast<Gtk::EventBox *>(tab);
+    auto *box = static_cast<Gtk::Box *>(*eventbox->get_children().begin());
+    auto children = box->get_children(); 
+    auto *close = static_cast<Gtk::Button *>(*children.crbegin());
+
+    sigc::connection close_connection = close->signal_clicked().connect(
+            sigc::bind<Gtk::Widget *>(sigc::mem_fun(*this, &DialogNotebook::on_close_button_click_event), page), true);
+
+    sigc::connection tab_connection = tab->signal_button_press_event().connect(
+        sigc::bind<Gtk::Widget *>(sigc::mem_fun(*this, &DialogNotebook::on_tab_click_event), page), true);
+
+    _tab_connections.insert(std::pair<Gtk::Widget *, sigc::connection>(page, tab_connection));
+    _tab_connections.insert(std::pair<Gtk::Widget *, sigc::connection>(page, close_connection));
+}
+
+/**
+ * Helper method that removes the close tab signal connection for the page given.
+ */
+void DialogNotebook::remove_close_tab_callback(Gtk::Widget *page)
+{
+    auto tab_connection_it = _tab_connections.find(page);
+
+    while (tab_connection_it != _tab_connections.end()) {
+        (*tab_connection_it).second.disconnect();
+        _tab_connections.erase(tab_connection_it);
+        tab_connection_it = _tab_connections.find(page);
+    }
+}
+
+} // namespace Dialog
+} // namespace UI
+} // namespace Inkscape
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :