Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 849 insertions, 0 deletions

diff --git a/src/inkscape.cpp b/src/inkscape.cpp
new file mode 100644
index 0000000..c20af1b
--- /dev/null
+++ b/src/inkscape.cpp
@@ -0,0 +1,849 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * Interface to main application.
+ */
+/* Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Liam P. White <inkscapebrony@gmail.com>
+ *
+ * Copyright (C) 1999-2014 authors
+ * c++ port Copyright (C) 2003 Nathan Hurst
+ * c++ification Copyright (C) 2014 Liam P. White
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <unistd.h>
+
+#include <map>
+
+#include <glibmm/regex.h>
+
+#include <gtkmm/icontheme.h>
+#include <gtkmm/messagedialog.h>
+
+#include <glibmm/i18n.h>
+#include <glibmm/miscutils.h>
+#include <glibmm/convert.h>
+
+#include "desktop.h"
+#include "device-manager.h"
+#include "document.h"
+#include "inkscape.h"
+#include "message-stack.h"
+#include "path-prefix.h"
+
+#include "debug/simple-event.h"
+#include "debug/event-tracker.h"
+
+#include "io/resource.h"
+#include "io/sys.h"
+
+#include "libnrtype/FontFactory.h"
+
+#include "object/sp-item-group.h"
+#include "object/sp-root.h"
+
+#include "ui/themes.h"
+#include "ui/dialog/debug.h"
+#include "ui/tools/tool-base.h"
+
+#include <fstream>
+
+// Inkscape::Application static members
+Inkscape::Application * Inkscape::Application::_S_inst = nullptr;
+bool Inkscape::Application::_crashIsHappening = false;
+
+#define DESKTOP_IS_ACTIVE(d) (INKSCAPE._desktops != nullptr && !INKSCAPE._desktops->empty() && ((d) == INKSCAPE._desktops->front()))
+
+static void (* segv_handler) (int) = SIG_DFL;
+static void (* abrt_handler) (int) = SIG_DFL;
+static void (* fpe_handler)  (int) = SIG_DFL;
+static void (* ill_handler)  (int) = SIG_DFL;
+#ifndef _WIN32
+static void (* bus_handler)  (int) = SIG_DFL;
+#endif
+
+#define SP_INDENT 8
+
+/**  C++ification TODO list
+ * - _S_inst should NOT need to be assigned inside the constructor, but if it isn't the Filters+Extensions menus break.
+ * - Application::_deskops has to be a pointer because of a signal bug somewhere else. Basically, it will attempt to access a deleted object in sp_ui_close_all(),
+ *   but if it's a pointer we can stop and return NULL in Application::active_desktop()
+ * - These functions are calling Application::create for no good reason I can determine:
+ *
+ *   Inkscape::UI::Dialog::SVGPreview::SVGPreview()
+ *       src/ui/dialog/filedialogimpl-gtkmm.cpp:542:9
+ */
+
+
+class InkErrorHandler : public Inkscape::ErrorReporter {
+public:
+    InkErrorHandler(bool useGui) : Inkscape::ErrorReporter(),
+                                   _useGui(useGui)
+    {}
+    ~InkErrorHandler() override = default;
+
+    void handleError( Glib::ustring const& primary, Glib::ustring const& secondary ) const override
+    {
+        if (_useGui) {
+            Gtk::MessageDialog err(primary, false, Gtk::MESSAGE_WARNING, Gtk::BUTTONS_OK, true);
+            err.set_secondary_text(secondary);
+            err.run();
+        } else {
+            g_message("%s", primary.data());
+            g_message("%s", secondary.data());
+        }
+    }
+
+private:
+    bool _useGui;
+};
+
+void inkscape_ref(Inkscape::Application & in)
+{
+    in.refCount++;
+}
+
+void inkscape_unref(Inkscape::Application & in)
+{
+    in.refCount--;
+
+    if (&in == Inkscape::Application::_S_inst) {
+        if (in.refCount <= 0) {
+            delete Inkscape::Application::_S_inst;
+        }
+    } else {
+        g_error("Attempt to unref an Application (=%p) not the current instance (=%p) (maybe it's already been destroyed?)",
+                &in, Inkscape::Application::_S_inst);
+    }
+}
+
+namespace Inkscape {
+
+/**
+ * Defined only for debugging purposes. If we are certain the bugs are gone we can remove this
+ * and the references in inkscape_ref and inkscape_unref.
+ */
+Application*
+Application::operator &() const
+{
+    return const_cast<Application*>(this);
+}
+/**
+ *  Creates a new Inkscape::Application global object.
+ */
+void
+Application::create(bool use_gui)
+{
+   if (!Application::exists()) {
+        new Application(use_gui);
+    } else {
+       // g_assert_not_reached();  Can happen with InkscapeApplication
+    }
+}
+
+
+/**
+ *  Checks whether the current Inkscape::Application global object exists.
+ */
+bool
+Application::exists()
+{
+    return Application::_S_inst != nullptr;
+}
+
+/**
+ *  Returns the current Inkscape::Application global object.
+ *  \pre Application::_S_inst != NULL
+ */
+Application&
+Application::instance()
+{
+    if (!exists()) {
+         g_error("Inkscape::Application does not yet exist.");
+    }
+    return *Application::_S_inst;
+}
+
+/* \brief Constructor for the application.
+ *  Creates a new Inkscape::Application.
+ *
+ *  \pre Application::_S_inst == NULL
+ */
+
+Application::Application(bool use_gui) :
+    _use_gui(use_gui)
+{
+    using namespace Inkscape::IO::Resource;
+    /* fixme: load application defaults */
+
+    segv_handler = signal (SIGSEGV, Application::crash_handler);
+    abrt_handler = signal (SIGABRT, Application::crash_handler);
+    fpe_handler  = signal (SIGFPE,  Application::crash_handler);
+    ill_handler  = signal (SIGILL,  Application::crash_handler);
+#ifndef _WIN32
+    bus_handler  = signal (SIGBUS,  Application::crash_handler);
+#endif
+
+    // \TODO: this belongs to Application::init but if it isn't here
+    // then the Filters and Extensions menus don't work.
+    _S_inst = this;
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    InkErrorHandler* handler = new InkErrorHandler(use_gui);
+    prefs->setErrorHandler(handler);
+    {
+        Glib::ustring msg;
+        Glib::ustring secondary;
+        if (prefs->getLastError( msg, secondary )) {
+            handler->handleError(msg, secondary);
+        }
+    }
+
+    if (use_gui) {
+        using namespace Inkscape::IO::Resource;
+        auto icon_theme = Gtk::IconTheme::get_default();
+        icon_theme->prepend_search_path(get_path_ustring(SYSTEM, ICONS));
+        icon_theme->prepend_search_path(get_path_ustring(USER, ICONS));
+        themecontext = new Inkscape::UI::ThemeContext();
+        themecontext->add_gtk_css(false);
+        auto scale = prefs->getDoubleLimited("/theme/fontscale", 100, 50, 150);
+        themecontext->adjust_global_font_scale(scale / 100.0);
+        Inkscape::DeviceManager::getManager().loadConfig();
+    }
+
+    /* set language for user interface according setting in preferences */
+    Glib::ustring ui_language = prefs->getString("/ui/language");
+    if(!ui_language.empty())
+    {
+        setenv("LANGUAGE", ui_language, true);
+#ifdef _WIN32
+        // locale may be set to C with some Windows Region Formats (like English(Europe)).
+        // forcing the LANGUAGE variable to be ignored
+        // see :guess_category_value:gettext-runtime/intl/dcigettext.c,
+        // and :gl_locale_name_from_win32_LANGID:gettext-runtime/gnulib-lib/localename.c
+        setenv("LANG", ui_language, true);
+#endif
+    }
+
+    /* DebugDialog redirection.  On Linux, default to OFF, on Win32, default to ON.
+     * Use only if use_gui is enabled
+     */
+#ifdef _WIN32
+#define DEFAULT_LOG_REDIRECT true
+#else
+#define DEFAULT_LOG_REDIRECT false
+#endif
+
+    if (use_gui && prefs->getBool("/dialogs/debug/redirect", DEFAULT_LOG_REDIRECT))
+    {
+        Inkscape::UI::Dialog::DebugDialog::getInstance()->captureLogMessages();
+    }
+
+    if (use_gui)
+    {
+        Inkscape::UI::Tools::init_latin_keys_group();
+        /* Check for global remapping of Alt key */
+        mapalt(guint(prefs->getInt("/options/mapalt/value", 0)));
+        trackalt(guint(prefs->getInt("/options/trackalt/value", 0)));
+
+        /* update highlight colors when theme changes */
+        themecontext->getChangeThemeSignal().connect([=](){
+            if (auto desktop = active_desktop()) {
+                set_default_highlight_colors(themecontext->getHighlightColors(desktop->getToplevel()));
+            }
+        });
+    }
+
+    /* Initialize font factory */
+    font_factory *factory = font_factory::Default();
+    if (prefs->getBool("/options/font/use_fontsdir_system", true)) {
+        char const *fontsdir = get_path(SYSTEM, FONTS);
+        factory->AddFontsDir(fontsdir);
+    }
+    if (prefs->getBool("/options/font/use_fontsdir_user", true)) {
+        char const *fontsdir = get_path(USER, FONTS);
+        factory->AddFontsDir(fontsdir);
+    }
+    Glib::ustring fontdirs_pref = prefs->getString("/options/font/custom_fontdirs");
+    std::vector<Glib::ustring> fontdirs = Glib::Regex::split_simple("\\|", fontdirs_pref);
+    for (auto &fontdir : fontdirs) {
+        factory->AddFontsDir(fontdir.c_str());
+    }
+}
+
+Application::~Application()
+{
+    if (_desktops) {
+        g_error("FATAL: desktops still in list on application destruction!");
+    }
+
+    Inkscape::Preferences::unload();
+
+    _S_inst = nullptr; // this will probably break things
+
+    refCount = 0;
+    // gtk_main_quit ();
+}
+
+/** Sets the keyboard modifier to map to Alt.
+ *
+ * Zero switches off mapping, as does '1', which is the default.
+ */
+void Application::mapalt(guint maskvalue)
+{
+    if ( maskvalue < 2 || maskvalue > 5 ) {  // MOD5 is the highest defined in gdktypes.h
+        _mapalt = 0;
+    } else {
+        _mapalt = (GDK_MOD1_MASK << (maskvalue-1));
+    }
+}
+
+void
+Application::crash_handler (int /*signum*/)
+{
+    using Inkscape::Debug::SimpleEvent;
+    using Inkscape::Debug::EventTracker;
+    using Inkscape::Debug::Logger;
+
+    static bool recursion = false;
+
+    /*
+     * reset all signal handlers: any further crashes should just be allowed
+     * to crash normally.
+     * */
+    signal (SIGSEGV, segv_handler );
+    signal (SIGABRT, abrt_handler );
+    signal (SIGFPE,  fpe_handler  );
+    signal (SIGILL,  ill_handler  );
+#ifndef _WIN32
+    signal (SIGBUS,  bus_handler  );
+#endif
+
+    /* Stop bizarre loops */
+    if (recursion) {
+        abort ();
+    }
+    recursion = true;
+
+    _crashIsHappening = true;
+
+    EventTracker<SimpleEvent<Inkscape::Debug::Event::CORE> > tracker("crash");
+    tracker.set<SimpleEvent<> >("emergency-save");
+
+    fprintf(stderr, "\nEmergency save activated!\n");
+
+    time_t sptime = time (nullptr);
+    struct tm *sptm = localtime (&sptime);
+    gchar sptstr[256];
+    strftime(sptstr, 256, "%Y_%m_%d_%H_%M_%S", sptm);
+
+    gint count = 0;
+    gchar *curdir = g_get_current_dir(); // This one needs to be freed explicitly
+    std::vector<gchar *> savednames;
+    std::vector<gchar *> failednames;
+    for (std::map<SPDocument*,int>::iterator iter = INKSCAPE._document_set.begin(), e = INKSCAPE._document_set.end();
+          iter != e;
+          ++iter) {
+        SPDocument *doc = iter->first;
+        Inkscape::XML::Node *repr;
+        repr = doc->getReprRoot();
+        if (doc->isModifiedSinceSave()) {
+            const gchar *docname;
+            char n[64];
+
+            /* originally, the document name was retrieved from
+             * the sodipod:docname attribute */
+            docname = doc->getDocumentName();
+            if (docname) {
+                /* Removes an emergency save suffix if present: /(.*)\.[0-9_]*\.[0-9_]*\.[~\.]*$/\1/ */
+                const char* d0 = strrchr ((char*)docname, '.');
+                if (d0 && (d0 > docname)) {
+                    const char* d = d0;
+                    unsigned int dots = 0;
+                    while ((isdigit (*d) || *d=='_' || *d=='.') && d>docname && dots<2) {
+                        d -= 1;
+                        if (*d=='.') dots++;
+                    }
+                    if (*d=='.' && d>docname && dots==2) {
+                        size_t len = MIN (d - docname, 63);
+                        memcpy (n, docname, len);
+                        n[len] = '\0';
+                        docname = n;
+                    }
+                }
+            }
+            if (!docname || !*docname) docname = "emergency";
+
+            // Emergency filename
+            char c[1024];
+            g_snprintf (c, 1024, "%.256s.%s.%d.svg", docname, sptstr, count);
+
+            const char* document_filename = doc->getDocumentFilename();
+            char* document_base = nullptr;
+            if (document_filename) {
+                document_base = g_path_get_dirname(document_filename);
+            }
+
+            // Find a location
+            const char* locations[] = {
+                // Don't use getDocumentBase as that also can be unsaved template locations.
+                document_base,
+                g_get_home_dir(),
+                g_get_tmp_dir(),
+                curdir,
+            };
+            FILE *file = nullptr;
+            for(auto & location : locations) {
+                if (!location) continue; // It seems to be okay, but just in case
+                gchar * filename = g_build_filename(location, c, nullptr);
+                Inkscape::IO::dump_fopen_call(filename, "E");
+                file = Inkscape::IO::fopen_utf8name(filename, "w");
+                if (file) {
+                    g_snprintf (c, 1024, "%s", filename); // we want the complete path to be stored in c (for reporting purposes)
+                    break;
+                }
+            }
+            if (document_base) {
+                g_free(document_base);
+            }
+
+            // Save
+            if (file) {
+                sp_repr_save_stream (repr->document(), file, SP_SVG_NS_URI);
+                savednames.push_back(g_strdup (c));
+                fclose (file);
+            } else {
+                failednames.push_back((doc->getDocumentName()) ? g_strdup(doc->getDocumentName()) : g_strdup (_("Untitled document")));
+            }
+            count++;
+        }
+    }
+    g_free(curdir);
+
+    if (!savednames.empty()) {
+        fprintf (stderr, "\nEmergency save document locations:\n");
+        for (auto i:savednames) {
+            fprintf (stderr, "  %s\n", i);
+        }
+    }
+    if (!failednames.empty()) {
+        fprintf (stderr, "\nFailed to do emergency save for documents:\n");
+        for (auto i:failednames) {
+            fprintf (stderr, "  %s\n", i);
+        }
+    }
+
+    // do not save the preferences since they can be in a corrupted state
+    Inkscape::Preferences::unload(false);
+
+    fprintf (stderr, "Emergency save completed. Inkscape will close now.\n");
+    fprintf (stderr, "If you can reproduce this crash, please file a bug at https://inkscape.org/report\n");
+    fprintf (stderr, "with a detailed description of the steps leading to the crash, so we can fix it.\n");
+
+    /* Show nice dialog box */
+
+    char const *istr = _("Inkscape encountered an internal error and will close now.\n");
+    char const *sstr = _("Automatic backups of unsaved documents were done to the following locations:\n");
+    char const *fstr = _("Automatic backup of the following documents failed:\n");
+    gint nllen = strlen ("\n");
+    gint len = strlen (istr) + strlen (sstr) + strlen (fstr);
+    for (auto i:savednames) {
+        len = len + SP_INDENT + strlen (i) + nllen;
+    }
+    for (auto i:failednames) {
+        len = len + SP_INDENT + strlen (i) + nllen;
+    }
+    len += 1;
+    gchar *b = g_new (gchar, len);
+    gint pos = 0;
+    len = strlen (istr);
+    memcpy (b + pos, istr, len);
+    pos += len;
+    if (!savednames.empty()) {
+        len = strlen (sstr);
+        memcpy (b + pos, sstr, len);
+        pos += len;
+        for (auto i:savednames) {
+            memset (b + pos, ' ', SP_INDENT);
+            pos += SP_INDENT;
+            len = strlen(i);
+            memcpy (b + pos, i, len);
+            pos += len;
+            memcpy (b + pos, "\n", nllen);
+            pos += nllen;
+        }
+    }
+    if (!failednames.empty()) {
+        len = strlen (fstr);
+        memcpy (b + pos, fstr, len);
+        pos += len;
+        for (auto i:failednames) {
+            memset (b + pos, ' ', SP_INDENT);
+            pos += SP_INDENT;
+            len = strlen(i);
+            memcpy (b + pos, i, len);
+            pos += len;
+            memcpy (b + pos, "\n", nllen);
+            pos += nllen;
+        }
+    }
+    *(b + pos) = '\0';
+
+    if ( exists() && instance().use_gui() ) {
+        GtkWidget *msgbox = gtk_message_dialog_new (nullptr, GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", b);
+        gtk_dialog_run (GTK_DIALOG (msgbox));
+        gtk_widget_destroy (msgbox);
+    }
+    else
+    {
+        g_message( "Error: %s", b );
+    }
+    g_free (b);
+
+    tracker.clear();
+    Logger::shutdown();
+
+    fflush(stderr); // make sure buffers are empty before crashing (otherwise output might be suppressed)
+
+    /* on exit, allow restored signal handler to take over and crash us */
+}
+
+
+void
+Application::add_desktop (SPDesktop * desktop)
+{
+    g_return_if_fail (desktop != nullptr);
+    if (_desktops == nullptr) {
+        _desktops = new std::vector<SPDesktop*>;
+    }
+
+    if (std::find(_desktops->begin(), _desktops->end(), desktop) != _desktops->end()) {
+        g_error("Attempted to add desktop already in list.");
+    }
+
+    _desktops->insert(_desktops->begin(), desktop);
+
+    signal_activate_desktop.emit(desktop);
+    signal_selection_set.emit(desktop->getSelection());
+    signal_selection_changed.emit(desktop->getSelection());
+}
+
+
+
+void
+Application::remove_desktop (SPDesktop * desktop)
+{
+    g_return_if_fail (desktop != nullptr);
+
+    if (std::find (_desktops->begin(), _desktops->end(), desktop) == _desktops->end() ) {
+        g_error("Attempted to remove desktop not in list.");
+    }
+
+
+    if (DESKTOP_IS_ACTIVE (desktop)) {
+        signal_deactivate_desktop.emit(desktop);
+        if (_desktops->size() > 1) {
+            SPDesktop * new_desktop = *(++_desktops->begin());
+            _desktops->erase(std::find(_desktops->begin(), _desktops->end(), new_desktop));
+            _desktops->insert(_desktops->begin(), new_desktop);
+
+            signal_activate_desktop.emit(new_desktop);
+            signal_selection_set.emit(new_desktop->getSelection());
+            signal_selection_changed.emit(new_desktop->getSelection());
+        } else {
+            if (desktop->getSelection())
+                desktop->getSelection()->clear();
+        }
+    }
+
+    _desktops->erase(std::find(_desktops->begin(), _desktops->end(), desktop));
+
+    // if this was the last desktop, shut down the program
+    if (_desktops->empty()) {
+        this->exit();
+        delete _desktops;
+        _desktops = nullptr;
+    }
+}
+
+
+
+void
+Application::activate_desktop (SPDesktop * desktop)
+{
+    g_return_if_fail (desktop != nullptr);
+
+    if (DESKTOP_IS_ACTIVE (desktop)) {
+        return;
+    }
+
+    std::vector<SPDesktop*>::iterator i;
+
+    if ((i = std::find (_desktops->begin(), _desktops->end(), desktop)) == _desktops->end()) {
+        g_error("Tried to activate desktop not added to list.");
+    }
+
+    SPDesktop *current = _desktops->front();
+
+    signal_deactivate_desktop.emit(current);
+
+    _desktops->erase (i);
+    _desktops->insert (_desktops->begin(), desktop);
+
+    signal_activate_desktop.emit(desktop);
+    signal_selection_set(desktop->getSelection());
+    signal_selection_changed(desktop->getSelection());
+}
+
+
+/**
+ *  Resends ACTIVATE_DESKTOP for current desktop; needed when a new desktop has got its window that dialogs will transientize to
+ */
+void
+Application::reactivate_desktop (SPDesktop * desktop)
+{
+    g_return_if_fail (desktop != nullptr);
+
+    if (DESKTOP_IS_ACTIVE (desktop)) {
+        signal_activate_desktop.emit(desktop);
+    }
+}
+
+
+
+SPDesktop *
+Application::find_desktop_by_dkey (unsigned int dkey)
+{
+    for (auto & _desktop : *_desktops) {
+        if (_desktop->dkey == dkey){
+            return _desktop;
+        }
+    }
+    return nullptr;
+}
+
+
+unsigned int
+Application::maximum_dkey()
+{
+    unsigned int dkey = 0;
+
+    for (auto & _desktop : *_desktops) {
+        if (_desktop->dkey > dkey){
+            dkey = _desktop->dkey;
+        }
+    }
+    return dkey;
+}
+
+
+
+SPDesktop *
+Application::next_desktop ()
+{
+    SPDesktop *d = nullptr;
+    unsigned int dkey_current = (_desktops->front())->dkey;
+
+    if (dkey_current < maximum_dkey()) {
+        // find next existing
+        for (unsigned int i = dkey_current + 1; i <= maximum_dkey(); ++i) {
+            d = find_desktop_by_dkey (i);
+            if (d) {
+                break;
+            }
+        }
+    } else {
+        // find first existing
+        for (unsigned int i = 0; i <= maximum_dkey(); ++i) {
+            d = find_desktop_by_dkey (i);
+            if (d) {
+                break;
+            }
+        }
+    }
+
+    g_assert (d);
+    return d;
+}
+
+
+
+SPDesktop *
+Application::prev_desktop ()
+{
+    SPDesktop *d = nullptr;
+    unsigned int dkey_current = (_desktops->front())->dkey;
+
+    if (dkey_current > 0) {
+        // find prev existing
+        for (signed int i = dkey_current - 1; i >= 0; --i) {
+            d = find_desktop_by_dkey (i);
+            if (d) {
+                break;
+            }
+        }
+    }
+    if (!d) {
+        // find last existing
+        d = find_desktop_by_dkey (maximum_dkey());
+    }
+
+    g_assert (d);
+    return d;
+}
+
+
+
+void
+Application::switch_desktops_next ()
+{
+    next_desktop()->presentWindow();
+}
+
+void
+Application::switch_desktops_prev()
+{
+    prev_desktop()->presentWindow();
+}
+
+void
+Application::external_change()
+{
+    signal_external_change.emit();
+}
+
+/**
+ * fixme: These need probably signals too
+ */
+void
+Application::add_document (SPDocument *document)
+{
+    g_return_if_fail (document != nullptr);
+
+    // try to insert the pair into the list
+    if (!(_document_set.insert(std::make_pair(document, 1)).second)) {
+        //insert failed, this key (document) is already in the list
+        for (auto & iter : _document_set) {
+            if (iter.first == document) {
+                // found this document in list, increase its count
+                iter.second ++;
+            }
+       }
+    }
+}
+
+
+// returns true if this was last reference to this document, so you can delete it
+bool
+Application::remove_document (SPDocument *document)
+{
+    g_return_val_if_fail (document != nullptr, false);
+
+    for (std::map<SPDocument *,int>::iterator iter = _document_set.begin();
+              iter != _document_set.end();
+              ++iter) {
+        if (iter->first == document) {
+            // found this document in list, decrease its count
+            iter->second --;
+            if (iter->second < 1) {
+                // this was the last one, remove the pair from list
+                _document_set.erase (iter);
+
+                return true;
+            } else {
+                return false;
+            }
+        }
+    }
+
+    return false;
+}
+
+SPDesktop *
+Application::active_desktop()
+{
+    if (!_desktops || _desktops->empty()) {
+        return nullptr;
+    }
+
+    return _desktops->front();
+}
+
+SPDocument *
+Application::active_document()
+{
+    if (SP_ACTIVE_DESKTOP) {
+        return SP_ACTIVE_DESKTOP->getDocument();
+    } else if (!_document_set.empty()) {
+        // If called from the command line there will be no desktop
+        // So 'fall back' to take the first listed document in the Inkscape instance
+        return _document_set.begin()->first;
+    }
+
+    return nullptr;
+}
+
+bool
+Application::sole_desktop_for_document(SPDesktop const &desktop) {
+    SPDocument const* document = desktop.doc();
+    if (!document) {
+        return false;
+    }
+    for (auto other_desktop : *_desktops) {
+        SPDocument *other_document = other_desktop->doc();
+        if ( other_document == document && other_desktop != &desktop ) {
+            return false;
+        }
+    }
+    return true;
+}
+
+/*#####################
+# HELPERS
+#####################*/
+
+void
+Application::refresh_display ()
+{
+    for (auto & _desktop : *_desktops) {
+        _desktop->requestRedraw();
+    }
+}
+
+
+/**
+ *  Handler for Inkscape's Exit verb.  This emits the shutdown signal,
+ *  saves the preferences if appropriate, and quits.
+ */
+void
+Application::exit ()
+{
+    //emit shutdown signal so that dialogs could remember layout
+    signal_shut_down.emit();
+
+    Inkscape::Preferences::unload();
+    //gtk_main_quit ();
+}
+
+void
+Application::get_all_desktops(std::list< SPDesktop* >& listbuf)
+{
+    listbuf.insert(listbuf.end(), _desktops->begin(), _desktops->end());
+}
+
+} // namespace Inkscape
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :