Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 551 insertions, 0 deletions

diff --git a/src/desktop-events.cpp b/src/desktop-events.cpp
new file mode 100644
index 0000000..7ab2750
--- /dev/null
+++ b/src/desktop-events.cpp
@@ -0,0 +1,551 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * Event handlers for SPDesktop.
+ */
+/* Author:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 1999-2010 Others
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <map>
+#include <string>
+
+#include "desktop-events.h"
+
+#include <gdkmm/display.h>
+#include <gdkmm/seat.h>
+
+#include <gtk/gtk.h>
+
+#include <glibmm/i18n.h>
+
+#include <2geom/line.h>
+#include <2geom/angle.h>
+
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "message-context.h"
+#include "preferences.h"
+#include "snap.h"
+
+#include "actions/actions-tools.h"
+
+#include "display/control/snap-indicator.h"
+#include "display/control/canvas-item-guideline.h"
+
+#include "object/sp-guide.h"
+#include "object/sp-namedview.h"
+#include "object/sp-root.h"
+
+#include "ui/cursor-utils.h"
+#include "ui/dialog-events.h"
+#include "ui/dialog/guides.h"
+#include "ui/event-debug.h"
+#include "ui/tools/tool-base.h"
+#include "ui/tools/node-tool.h"
+#include "ui/tools/select-tool.h"
+#include "ui/widget/canvas.h"
+
+#include "widgets/desktop-widget.h"
+
+#include "xml/repr.h"
+
+using Inkscape::DocumentUndo;
+
+static void snoop_extended(GdkEvent* event, SPDesktop *desktop);
+static void init_extended();
+
+/* Root canvas item handler */
+
+bool sp_desktop_root_handler(GdkEvent *event, SPDesktop *desktop)
+{
+#ifdef EVENT_DEBUG
+    ui_dump_event(reinterpret_cast<GdkEvent *>(event), "sp_desktop_root_handler");
+#endif
+    static bool watch = false;
+    static bool first = true;
+
+    if ( first ) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        if ( prefs->getBool("/options/useextinput/value", true)
+            && prefs->getBool("/options/switchonextinput/value") ) {
+            watch = true;
+            init_extended();
+        }
+        first = false;
+    }
+    if ( watch ) {
+        snoop_extended(event, desktop);
+    }
+
+    if (auto ec = desktop->event_context) {
+        return (bool)ec->start_root_handler(event);
+    }
+    return false;
+}
+
+
+
+static Geom::Point drag_origin;
+static SPGuideDragType drag_type = SP_DRAG_NONE;
+//static bool reset_drag_origin = false; // when Ctrl is pressed while dragging, this is used to trigger resetting of the
+//                                       // drag origin to that location so that constrained movement is more intuitive
+
+// Min distance from anchor to initiate rotation, measured in screenpixels
+#define tol 40.0
+
+bool sp_dt_guide_event(GdkEvent *event, Inkscape::CanvasItemGuideLine *guide_item, SPGuide *guide)
+{
+#ifdef EVENT_DEBUG
+    ui_dump_event(reinterpret_cast<GdkEvent *>(event), "sp_dt_guide_event");
+#endif
+
+    static bool moved = false;
+    bool ret = false;
+
+    SPDesktop *desktop = guide_item->get_canvas()->get_desktop();
+    if (!desktop) {
+        std::cerr << "sp_dt_guide_event: No desktop!" << std::endl;
+        return false;
+    }
+    // Limit to select tool only.
+    if (!dynamic_cast<Inkscape::UI::Tools::SelectTool *>(desktop->event_context) &&
+        !dynamic_cast<Inkscape::UI::Tools::NodeTool *>(desktop->event_context)) {
+        return false;
+    }
+
+    switch (event->type) {
+        case GDK_2BUTTON_PRESS:
+            if (event->button.button == 1) {
+                drag_type = SP_DRAG_NONE;
+                desktop->event_context->discard_delayed_snap_event();
+                guide_item->ungrab();
+                Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
+                ret = true;
+            }
+            break;
+
+        case GDK_BUTTON_PRESS:
+            if (event->button.button == 1 && !guide->getLocked()) {
+                Geom::Point const event_w(event->button.x, event->button.y);
+                Geom::Point const event_dt(desktop->w2d(event_w));
+
+                // Due to the tolerance allowed when grabbing a guide, event_dt will generally
+                // be close to the guide but not just exactly on it. The drag origin calculated
+                // here must be exactly on the guide line though, otherwise
+                // small errors will occur once we snap, see
+                // https://bugs.launchpad.net/inkscape/+bug/333762
+                drag_origin = Geom::projection(event_dt, Geom::Line(guide->getPoint(), guide->angle()));
+
+                if (event->button.state & GDK_SHIFT_MASK) {
+                    // with shift we rotate the guide
+                    drag_type = SP_DRAG_ROTATE;
+                } else {
+                    if (event->button.state & GDK_CONTROL_MASK) {
+                        drag_type = SP_DRAG_MOVE_ORIGIN;
+                    } else {
+                        drag_type = SP_DRAG_TRANSLATE;
+                    }
+                }
+
+                if (drag_type == SP_DRAG_ROTATE || drag_type == SP_DRAG_TRANSLATE) {
+                    guide_item->grab((Gdk::BUTTON_RELEASE_MASK      |
+                                      Gdk::BUTTON_PRESS_MASK        |
+                                      Gdk::POINTER_MOTION_MASK      ),
+                                     nullptr);
+                }
+                ret = true;
+            }
+            break;
+
+        case GDK_MOTION_NOTIFY:
+            if (drag_type != SP_DRAG_NONE) {
+                Geom::Point const motion_w(event->motion.x,
+                                           event->motion.y);
+                Geom::Point motion_dt(desktop->w2d(motion_w));
+
+                sp_event_context_snap_delay_handler(
+                    desktop->event_context, (void *) guide_item, (void *) guide, (GdkEventMotion *)event,
+                    Inkscape::UI::Tools::DelayedSnapEvent::GUIDE_HANDLER);
+
+                // This is for snapping while dragging existing guidelines. New guidelines,
+                // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
+                SnapManager &m = desktop->namedview->snap_manager;
+                m.setup(desktop, true, guide, nullptr);
+                if (drag_type == SP_DRAG_MOVE_ORIGIN) {
+                    // If we snap in guideConstrainedSnap() below, then motion_dt will
+                    // be forced to be on the guide. If we don't snap however, then
+                    // the origin should still be constrained to the guide. So let's do
+                    // that explicitly first:
+                    Geom::Line line(guide->getPoint(), guide->angle());
+                    Geom::Coord t = line.nearestTime(motion_dt);
+                    motion_dt = line.pointAt(t);
+                    if (!(event->motion.state & GDK_SHIFT_MASK)) {
+                        m.guideConstrainedSnap(motion_dt, *guide);
+                    }
+                } else if (!((drag_type == SP_DRAG_ROTATE) && (event->motion.state & GDK_CONTROL_MASK))) {
+                    // cannot use shift here to disable snapping, because we already use it for rotating the guide
+                    Geom::Point temp;
+                    if (drag_type == SP_DRAG_ROTATE) {
+                        temp = guide->getPoint();
+                        m.guideFreeSnap(motion_dt, temp, true, false);
+                        guide->moveto(temp, false);
+                    } else {
+                        temp = guide->getNormal();
+                        m.guideFreeSnap(motion_dt, temp, false, true);
+                        guide->set_normal(temp, false);
+                    }
+                }
+                m.unSetup();
+
+                switch (drag_type) {
+                    case SP_DRAG_TRANSLATE:
+                    {
+                        guide->moveto(motion_dt, false);
+                        break;
+                    }
+                    case SP_DRAG_ROTATE:
+                    {
+                        Geom::Point pt = motion_dt - guide->getPoint();
+                        Geom::Angle angle(pt);
+                        if (event->motion.state & GDK_CONTROL_MASK) {
+                            Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+                            unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
+                            bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false);
+                            if (snaps) {
+                                if (relative_snaps) {
+                                    Geom::Angle orig_angle(guide->getNormal());
+                                    Geom::Angle snap_angle = angle - orig_angle;
+                                    double sections = floor(snap_angle.radians0() * snaps / M_PI + .5);
+                                    angle = (M_PI / snaps) * sections + orig_angle.radians0();
+                                } else {
+                                    double sections = floor(angle.radians0() * snaps / M_PI + .5);
+                                    angle = (M_PI / snaps) * sections;
+                                }
+                            }
+                        }
+                        guide->set_normal(Geom::Point::polar(angle).cw(), false);
+                        break;
+                    }
+                    case SP_DRAG_MOVE_ORIGIN:
+                    {
+                        guide->moveto(motion_dt, false);
+                        break;
+                    }
+                    case SP_DRAG_NONE:
+                        assert(false);
+                        break;
+                }
+                moved = true;
+                desktop->set_coordinate_status(motion_dt);
+                desktop->getCanvas()->grab_focus();
+
+                ret = true;
+            }
+            break;
+
+        case GDK_BUTTON_RELEASE:
+            if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
+                desktop->event_context->discard_delayed_snap_event();
+
+                if (moved) {
+                    Geom::Point const event_w(event->button.x,
+                                              event->button.y);
+                    Geom::Point event_dt(desktop->w2d(event_w));
+                    SnapManager &m = desktop->namedview->snap_manager;
+                    m.setup(desktop, true, guide, nullptr);
+                    if (drag_type == SP_DRAG_MOVE_ORIGIN) {
+                        // If we snap in guideConstrainedSnap() below, then motion_dt will
+                        // be forced to be on the guide. If we don't snap however, then
+                        // the origin should still be constrained to the guide. So let's
+                        // do that explicitly first:
+                        Geom::Line line(guide->getPoint(), guide->angle());
+                        Geom::Coord t = line.nearestTime(event_dt);
+                        event_dt = line.pointAt(t);
+                        if (!(event->button.state & GDK_SHIFT_MASK)) {
+                            m.guideConstrainedSnap(event_dt, *guide);
+                        }
+                    } else if (!((drag_type == SP_DRAG_ROTATE) && (event->motion.state & GDK_CONTROL_MASK))) {
+                        // cannot use shift here to disable snapping, because we already use it for rotating the guide
+                        Geom::Point temp;
+                        if (drag_type == SP_DRAG_ROTATE) {
+                            temp = guide->getPoint();
+                            m.guideFreeSnap(event_dt, temp, true, false);
+                            guide->moveto(temp, false);
+                        } else {
+                            temp = guide->getNormal();
+                            m.guideFreeSnap(event_dt, temp, false, true);
+                            guide->set_normal(temp, false);
+                        }
+                    }
+                    m.unSetup();
+
+                    if (guide_item->get_canvas()->world_point_inside_canvas(event_w)) {
+                        switch (drag_type) {
+                            case SP_DRAG_TRANSLATE:
+                            {
+                                guide->moveto(event_dt, true);
+                                break;
+                            }
+                            case SP_DRAG_ROTATE:
+                            {
+                                Geom::Point pt = event_dt - guide->getPoint();
+                                Geom::Angle angle(pt);
+                                if (event->motion.state & GDK_CONTROL_MASK) {
+                                    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+                                    unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
+                                    bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false);
+                                    if (snaps) {
+                                        if (relative_snaps) {
+                                            Geom::Angle orig_angle(guide->getNormal());
+                                            Geom::Angle snap_angle = angle - orig_angle;
+                                            double sections = floor(snap_angle.radians0() * snaps / M_PI + .5);
+                                            angle = (M_PI / snaps) * sections + orig_angle.radians0();
+                                        } else {
+                                            double sections = floor(angle.radians0() * snaps / M_PI + .5);
+                                            angle = (M_PI / snaps) * sections;
+                                        }
+                                    }
+                                }
+                                guide->set_normal(Geom::Point::polar(angle).cw(), true);
+                                break;
+                            }
+                            case SP_DRAG_MOVE_ORIGIN:
+                            {
+                                guide->moveto(event_dt, true);
+                                break;
+                            }
+                            case SP_DRAG_NONE:
+                                assert(false);
+                                break;
+                        }
+                        DocumentUndo::done(desktop->getDocument(), _("Move guide"), "");
+                    } else {
+                        /* Undo movement of any attached shapes. */
+                        guide->moveto(guide->getPoint(), false);
+                        guide->set_normal(guide->getNormal(), false);
+                        guide->remove();
+                        guide_item = nullptr;
+                        desktop->event_context->use_tool_cursor();
+
+                        DocumentUndo::done(desktop->getDocument(), _("Delete guide"), "");
+                    }
+                    moved = false;
+                    desktop->set_coordinate_status(event_dt);
+                }
+                drag_type = SP_DRAG_NONE;
+                if (guide_item) {
+                    guide_item->ungrab();
+                }
+                ret = true;
+            }
+            break;
+
+        case GDK_ENTER_NOTIFY:
+        {
+            // This is a UX thing. Check if the canvas has focus, so the user knows they can
+            // use hotkeys. See issue: https://gitlab.com/inkscape/inkscape/-/issues/2439
+            if (!guide->getLocked() && desktop->getCanvas()->has_focus()) {
+                guide_item->set_stroke(guide->getHiColor());
+            }
+
+            // set move or rotate cursor
+            Geom::Point const event_w(event->crossing.x, event->crossing.y);
+
+            auto display = desktop->getCanvas()->get_display();
+            auto window  = desktop->getCanvas()->get_window();
+
+            Glib::RefPtr<Gdk::Cursor> cursor;
+            if (guide->getLocked()) {
+                cursor = Inkscape::load_svg_cursor(display, window, "select.svg");
+            } else if ((event->crossing.state & GDK_SHIFT_MASK) && (drag_type != SP_DRAG_MOVE_ORIGIN)) {
+                cursor = Inkscape::load_svg_cursor(display, window, "rotate.svg");
+            } else {
+                cursor = Gdk::Cursor::create(display, "grab");
+            }
+            window->set_cursor(cursor);
+
+            char *guide_description = guide->description();
+            desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
+            g_free(guide_description);
+            break;
+        }
+
+        case GDK_LEAVE_NOTIFY:
+
+            guide_item->set_stroke(guide->getColor());
+
+            // restore event context's cursor
+            desktop->event_context->use_tool_cursor();
+
+            desktop->guidesMessageContext()->clear();
+            break;
+
+        case GDK_KEY_PRESS:
+            switch (Inkscape::UI::Tools::get_latin_keyval (&event->key)) {
+                case GDK_KEY_Delete:
+                case GDK_KEY_KP_Delete:
+                case GDK_KEY_BackSpace:
+                {
+                    SPDocument *doc = guide->document;
+                    if (!guide->getLocked()) {
+                        guide->remove();
+                        guide_item = nullptr;
+                        DocumentUndo::done(doc, _("Delete guide"), "");
+                        ret = true;
+                        desktop->event_context->discard_delayed_snap_event();
+                        desktop->event_context->use_tool_cursor();
+                    }
+                    break;
+                }
+                case GDK_KEY_Shift_L:
+                case GDK_KEY_Shift_R:
+                    if (drag_type != SP_DRAG_MOVE_ORIGIN) {
+
+                        auto display = desktop->getCanvas()->get_display();
+                        auto window  = desktop->getCanvas()->get_window();
+
+                        auto cursor = Inkscape::load_svg_cursor(display, window, "rotate.svg");
+                        window->set_cursor(cursor);
+                        ret = true;
+                        break;
+                    }
+
+                default:
+                    // do nothing;
+                    break;
+            }
+            break;
+
+        case GDK_KEY_RELEASE:
+            switch (Inkscape::UI::Tools::get_latin_keyval (&event->key)) {
+                case GDK_KEY_Shift_L:
+                case GDK_KEY_Shift_R:
+                {
+                    auto display = Gdk::Display::get_default();
+                    auto guide_cursor = Gdk::Cursor::create(display, "grab");
+                    desktop->getCanvas()->get_window()->set_cursor(guide_cursor);
+                    break;
+                }
+                default:
+                    // do nothing;
+                    break;
+            }
+            break;
+
+        default:
+            break;
+    }
+
+    return ret;
+}
+
+static std::map<std::string, Glib::ustring> toolToUse;
+static std::string lastName;
+static GdkInputSource lastType = GDK_SOURCE_MOUSE;
+
+static void init_extended()
+{
+    Glib::ustring avoidName("pad");
+    auto display = Gdk::Display::get_default();
+    auto seat = display->get_default_seat();
+    auto const devices = seat->get_slaves(Gdk::SEAT_CAPABILITY_ALL);
+    
+    if ( !devices.empty() ) {
+        for (auto const &dev : devices) {
+            auto const devName = dev->get_name();
+            auto devSrc = dev->get_source();
+            
+            if ( !devName.empty()
+                 && (avoidName != devName)
+                 && (devSrc != Gdk::SOURCE_MOUSE) ) {
+//                 g_message("Adding '%s' as [%d]", devName, devSrc);
+
+                // Set the initial tool for the device
+                switch ( devSrc ) {
+                    case Gdk::SOURCE_PEN:
+                        toolToUse[devName] = "Calligraphic";
+                        break;
+                    case Gdk::SOURCE_ERASER:
+                        toolToUse[devName] = "Eraser";
+                        break;
+                    case Gdk::SOURCE_CURSOR:
+                        toolToUse[devName] = "Select";
+                        break;
+                    default:
+                        ; // do not add
+                }
+//            } else if (devName) {
+//                 g_message("Skippn '%s' as [%d]", devName, devSrc);
+            }
+        }
+    }
+}
+
+
+void snoop_extended(GdkEvent* event, SPDesktop *desktop)
+{
+    GdkDevice *source_device = gdk_event_get_source_device (event);
+    GdkInputSource source = GDK_SOURCE_MOUSE;
+    std::string name;
+
+    if (! source_device) return;
+    switch ( event->type ) {
+        case GDK_MOTION_NOTIFY:
+        case GDK_BUTTON_PRESS:
+        case GDK_2BUTTON_PRESS:
+        case GDK_3BUTTON_PRESS:
+        case GDK_BUTTON_RELEASE:
+        case GDK_SCROLL:
+        case GDK_PROXIMITY_IN:
+        case GDK_PROXIMITY_OUT:
+    // fix to previous code using event->device that did not point to original device that generated the event.
+        source = gdk_device_get_source(source_device);
+        name = gdk_device_get_name(source_device);
+    
+        break;
+
+        default:
+            ;
+    }
+
+
+    if (!name.empty()) {
+        if ( lastType != source || lastName != name ) {
+            // The device switched. See if it is one we 'count'
+            //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
+            auto it = toolToUse.find(lastName);
+            if (it != toolToUse.end()) {
+                // Save the tool currently selected for next time the input
+                // device shows up.
+                it->second = get_active_tool(desktop);
+            }
+
+            it = toolToUse.find(name);
+            if (it != toolToUse.end() ) {
+                set_active_tool(desktop, it->second);
+            }
+
+            lastName = name;
+            lastType = source;
+        }
+    }
+}
+/*
+  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 :
+