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Diffstat (limited to 'src/desktop.cpp')
| -rw-r--r-- | src/desktop.cpp | 1594 |
1 files changed, 1594 insertions, 0 deletions
diff --git a/src/desktop.cpp b/src/desktop.cpp new file mode 100644 index 0000000..82db16b --- /dev/null +++ b/src/desktop.cpp @@ -0,0 +1,1594 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Editable view implementation + * + * Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * MenTaLguY <mental@rydia.net> + * bulia byak <buliabyak@users.sf.net> + * Ralf Stephan <ralf@ark.in-berlin.de> + * John Bintz <jcoswell@coswellproductions.org> + * Johan Engelen <j.b.c.engelen@ewi.utwente.nl> + * Jon A. Cruz <jon@joncruz.org> + * Abhishek Sharma + * + * Copyright (C) 2007 Jon A. Cruz + * Copyright (C) 2006-2008 Johan Engelen + * Copyright (C) 2006 John Bintz + * Copyright (C) 2004 MenTaLguY + * Copyright (C) 1999-2002 Lauris Kaplinski + * Copyright (C) 2000-2001 Ximian, Inc. + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <glibmm/i18n.h> +#include <2geom/transforms.h> +#include <2geom/rect.h> +#include <memory> + +#include "desktop.h" + +#include "color.h" +#include "desktop-events.h" +#include "desktop-style.h" +#include "device-manager.h" +#include "document-undo.h" +#include "event-log.h" +#include "inkscape-window.h" +#include "layer-manager.h" +#include "message-context.h" +#include "message-stack.h" + +#include "actions/actions-view-mode.h" // To update View menu + +#include "display/drawing.h" +#include "display/control/canvas-temporary-item-list.h" +#include "display/control/canvas-grid.h" // Grid types +#include "display/control/snap-indicator.h" + +#include "display/control/canvas-item-catchall.h" +#include "display/control/canvas-item-drawing.h" +#include "display/control/canvas-item-group.h" +#include "display/control/canvas-item-rect.h" +#include "display/control/canvas-item-rotate.h" + +#include "io/fix-broken-links.h" + +#include "object/sp-namedview.h" +#include "object/sp-root.h" + +#include "ui/desktop/menubar.h" +#include "ui/dialog/dialog-container.h" +#include "ui/interface.h" // Only for getLayoutPrefPath +#include "ui/tool-factory.h" +#include "ui/tools/tool-base.h" +#include "ui/tools/box3d-tool.h" +#include "ui/tools/select-tool.h" +#include "ui/widget/canvas.h" + +#include "widgets/desktop-widget.h" + +// TODO those includes are only for node tool quick zoom. Remove them after fixing it. +#include "ui/tools/node-tool.h" +#include "ui/tool/control-point-selection.h" + +namespace Inkscape { namespace XML { class Node; }} + +// Callback declarations +static bool _drawing_handler (GdkEvent *event, Inkscape::DrawingItem *item, SPDesktop *desktop); +static void _reconstruction_start(SPDesktop * desktop); +static void _reconstruction_finish(SPDesktop * desktop); + +static gdouble _pinch_begin_zoom = 1.; + +static void _pinch_begin_handler(GtkGesture *gesture, GdkEventSequence *sequence, SPDesktop *desktop) +{ + _pinch_begin_zoom = desktop->current_zoom(); +} + +static void _pinch_scale_changed_handler(GtkGesture *gesture, gdouble delta, SPDesktop *desktop) +{ + GdkEventSequence *sequence = gtk_gesture_get_last_updated_sequence(gesture); + const GdkEvent *event = gtk_gesture_get_last_event(gesture, sequence); + + Geom::Point button_window(event->button.x, event->button.y); + Geom::Point button_world = desktop->getCanvas()->canvas_to_world(button_window); + Geom::Point button_dt(desktop->w2d(button_world)); + + desktop->zoom_absolute(button_dt, _pinch_begin_zoom * delta); +} + +SPDesktop::SPDesktop() + : namedview(nullptr) + , canvas(nullptr) + , selection(nullptr) + , temporary_item_list(nullptr) + , snapindicator(nullptr) + , current(nullptr) // current style + , _focusMode(false) + , dkey(0) + , window_state(0) + , interaction_disabled_counter(0) + , waiting_cursor(false) + , showing_dialogs(false) + , guides_active(false) + , gr_item(nullptr) + , gr_point_type(POINT_LG_BEGIN) + , gr_point_i(0) + , gr_fill_or_stroke(Inkscape::FOR_FILL) + , _reconstruction_old_layer_id() + // an id attribute is not allowed to be the empty string + , _widget(nullptr) // DesktopWidget + , _guides_message_context(nullptr) + , _active(false) + , _image_render_observer(this, "/options/rendering/imageinoutlinemode") + , grids_visible(false) +{ + _layer_manager = std::make_unique<Inkscape::LayerManager>(this); + selection = Inkscape::GC::release(new Inkscape::Selection(this)); +} + +void +SPDesktop::init (SPNamedView *nv, Inkscape::UI::Widget::Canvas *acanvas, SPDesktopWidget *widget) +{ + namedview = nv; + canvas = acanvas; + _widget = widget; + + // Temporary workaround for link order issues: + Inkscape::DeviceManager::getManager().getDevices(); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + _guides_message_context = std::unique_ptr<Inkscape::MessageContext>(new Inkscape::MessageContext(messageStack())); + + current = prefs->getStyle("/desktop/style"); + + SPDocument *document = namedview->document; + /* XXX: + * ensureUpToDate() sends a 'modified' signal to the root element. + * This is reportedly required to prevent flickering after the document + * loads. However, many SPObjects write to their repr in response + * to this signal. This is apparently done to support live path effects, + * which rewrite their result paths after each modification of the base object. + * This causes the generation of an incomplete undo transaction, + * which causes problems down the line, including crashes in the + * Undo History dialog. + * + * For now, this is handled by disabling undo tracking during this call. + * A proper fix would involve modifying the way ensureUpToDate() works, + * so that the LPE results are not rewritten. + */ + Inkscape::DocumentUndo::setUndoSensitive(document, false); + document->ensureUpToDate(); + Inkscape::DocumentUndo::setUndoSensitive(document, true); + + dkey = SPItem::display_key_new(1); + + /* Connect document */ + setDocument (document); + + namedview->viewcount++; + + /* Setup Canvas */ + namedview->set_desk_color(this); // Background page sits on. + + /* ----------- Canvas Items ------------ */ + + /* CanvasItem's: Controls/Grids/etc. Canvas items are owned by the canvas through + * canvas_item_root. Canvas items are automatically added and removed from the tree when + * created and deleted (as long as a canvas item group is passed in the constructor). + * It would probably make sense to move most of this code to the Canvas. + */ + + Inkscape::CanvasItemGroup *canvas_item_root = canvas->get_canvas_item_root(); + + // The order in which these canvas items are added determines the z-order. It's therefore + // important to add the tempgroup (which will contain the snapindicator) before adding the + // controls. Only this way one will be able to quickly (before the snap indicator has + // disappeared) reselect a node after snapping it. If the z-order is wrong however, this + // will not work (the snap indicator is on top of the node handler; is the snapindicator + // being selected? or does it intercept some of the events that should have gone to the + // node handler? see bug https://bugs.launchpad.net/inkscape/+bug/414142) + + canvas_catchall = new Inkscape::CanvasItemCatchall(canvas_item_root); // Lowest item! + canvas_group_pages_bg = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_drawing = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_pages_fg = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_grids = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_guides = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_sketch = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_temp = new Inkscape::CanvasItemGroup(canvas_item_root); + canvas_group_controls = new Inkscape::CanvasItemGroup(canvas_item_root); + + canvas_group_pages_bg->set_name("CanvasItemGroup:PagesBg"); // Page backgrounds + canvas_group_drawing->set_name("CanvasItemGroup:Drawing"); // The actual SVG drawing. + canvas_group_pages_fg->set_name("CanvasItemGroup:PagesFg"); // Page borders, when on top. + canvas_group_grids->set_name("CanvasItemGroup:Grids"); // Grids. + canvas_group_guides->set_name("CanvasItemGroup:Guides"); // Guides. + canvas_group_sketch->set_name("CanvasItemGroup:Sketch"); // Temporary items before becoming permanent. + canvas_group_temp->set_name("CanvasItemGroup:Temp"); // Temporary items that disappear by themselves. + canvas_group_controls->set_name("CanvasItemGroup:Controls"); // Controls (handles, knots, rectangles, etc.). + + canvas_group_sketch->set_pickable(false); // Temporary items are not pickable! + canvas_group_temp->set_pickable(false); // Temporary items are not pickable! + + // The root should never emit events. The "catchall" should get it! (CHECK) + canvas_item_root->connect_event(sigc::bind(sigc::ptr_fun(sp_desktop_root_handler), this)); + canvas_catchall->connect_event(sigc::bind(sigc::ptr_fun(sp_desktop_root_handler), this)); + + // Drawing + Geom::Rect const d(Geom::Point(0.0, 0.0), + Geom::Point(document->getWidth().value("px"), document->getHeight().value("px"))); + + canvas_drawing = new Inkscape::CanvasItemDrawing(canvas_group_drawing); + canvas_drawing->get_drawing()->delta = prefs->getDouble("/options/cursortolerance/value", 1.0); + canvas_drawing->connect_drawing_event(sigc::bind(sigc::ptr_fun(_drawing_handler), this)); + canvas->set_drawing(canvas_drawing->get_drawing()); // Canvas needs access. + + Inkscape::DrawingItem *drawing_item = document->getRoot()->invoke_show( + *(canvas_drawing->get_drawing()), + dkey, + SP_ITEM_SHOW_DISPLAY); + if (drawing_item) { + canvas_drawing->get_drawing()->root()->prependChild(drawing_item); + } + + // Must be the top most item. + canvas_rotate = new Inkscape::CanvasItemRotate(canvas_item_root); + canvas_rotate->hide(); + + temporary_item_list = new Inkscape::Display::TemporaryItemList( this ); + snapindicator = new Inkscape::Display::SnapIndicator ( this ); + + /* --------- End Canvas Items ----------- */ + + namedview->show(this); + /* Ugly hack */ + activate_guides (true); + + // Set the select tool as the active tool. + setEventContext("/tools/select"); + + // display rect and zoom are now handled in sp_desktop_widget_realize() + + // pinch zoom + zoomgesture = gtk_gesture_zoom_new(GTK_WIDGET(canvas->gobj())); + gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (zoomgesture), GTK_PHASE_CAPTURE); + g_signal_connect(zoomgesture, "begin", G_CALLBACK(_pinch_begin_handler), this); + g_signal_connect(zoomgesture, "scale-changed", G_CALLBACK(_pinch_scale_changed_handler), this); + +/* Set up notification of rebuilding the document, this allows + for saving object related settings in the document. */ + _reconstruction_start_connection = + document->connectReconstructionStart(sigc::bind(sigc::ptr_fun(_reconstruction_start), this)); + _reconstruction_finish_connection = + document->connectReconstructionFinish(sigc::bind(sigc::ptr_fun(_reconstruction_finish), this)); + _reconstruction_old_layer_id.clear(); + + showGrids(namedview->grids_visible, false); +} + +void SPDesktop::destroy() +{ + _destroy_signal.emit(this); + + canvas->set_drawing(nullptr); // Ensures deactivation + canvas->set_desktop(nullptr); // Todo: Remove desktop dependency. + + if (event_context) { + delete event_context; + event_context = nullptr; + } + + if (snapindicator) { + delete snapindicator; + snapindicator = nullptr; + } + + if (temporary_item_list) { + delete temporary_item_list; + temporary_item_list = nullptr; + } + + if (selection) { + delete selection; + selection = nullptr; + } + + namedview->hide(this); + + _sel_changed_connection.disconnect(); + _reconstruction_start_connection.disconnect(); + _reconstruction_finish_connection.disconnect(); + + if (zoomgesture) { + g_signal_handlers_disconnect_by_data(zoomgesture, this); + g_clear_object(&zoomgesture); + } + + if (canvas_drawing) { + doc()->getRoot()->invoke_hide(dkey); + delete canvas_drawing; // Why is canvas_drawing special? + canvas_drawing = nullptr; + } + + _guides_message_context = nullptr; +} + +SPDesktop::~SPDesktop() += default; + + +//-------------------------------------------------------------------- +/* Public methods */ + + +/* These methods help for temporarily showing things on-canvas. + * The *only* valid use of the TemporaryItem* that you get from add_temporary_canvasitem + * is when you want to prematurely remove the item from the canvas, by calling + * desktop->remove_temporary_canvasitem(tempitem). + */ +/** Note that lifetime is measured in milliseconds + * One should *not* keep a reference to the SPCanvasItem, the temporary item code will + * delete the object for you and the reference will become invalid without you knowing it. + * It is perfectly safe to ignore the returned pointer: the object is deleted by itself, so don't delete it elsewhere! + * The *only* valid use of the returned TemporaryItem* is as argument for SPDesktop::remove_temporary_canvasitem, + * because the object might be deleted already without you knowing it. + * move_to_bottom = true by default so the item does not interfere with handling of other items on the canvas like nodes. + */ +Inkscape::Display::TemporaryItem * +SPDesktop::add_temporary_canvasitem (Inkscape::CanvasItem *item, guint lifetime, bool move_to_bottom) +{ + if (move_to_bottom) { + item->lower_to_bottom(); + } + + return temporary_item_list->add_item(item, lifetime); +} + +/** It is perfectly safe to call this function while the object has already been deleted due to a timeout. +*/ +void +SPDesktop::remove_temporary_canvasitem (Inkscape::Display::TemporaryItem * tempitem) +{ + // check for non-null temporary_item_list, because during destruction of desktop, some destructor might try to access this list! + if (tempitem && temporary_item_list) { + temporary_item_list->delete_item(tempitem); + } +} + +void SPDesktop::redrawDesktop() { + canvas->set_affine(_current_affine.d2w()); // For CanvasItem's. +} + +/** + * True if desktop viewport intersects \a item's bbox. + */ +bool SPDesktop::isWithinViewport (SPItem *item) const +{ + auto const viewport = get_display_area(); + Geom::OptRect const bbox = item->desktopVisualBounds(); + if (bbox) { + return viewport.intersects(*bbox); + } else { + return false; + } +} + +/// +bool SPDesktop::itemIsHidden(SPItem const *item) const { + return item->isHidden(this->dkey); +} + +/** + * Set activate status of current desktop's named view. + */ +void +SPDesktop::activate_guides(bool activate) +{ + guides_active = activate; + namedview->activateGuides(this, activate); +} + +/** + * Make desktop switch documents. + */ +void +SPDesktop::change_document (SPDocument *theDocument) +{ + g_return_if_fail (theDocument != nullptr); + + /* unselect everything before switching documents */ + selection->clear(); + + // Reset any tool actions currently in progress. + setEventContext(event_context->getPrefsPath()); + + setDocument (theDocument); + + /* update the rulers, connect the desktop widget's signal to the new namedview etc. + (this can probably be done in a better way) */ + InkscapeWindow *parent = this->getInkscapeWindow(); + g_assert(parent != nullptr); + parent->change_document(theDocument); + SPDesktopWidget *dtw = parent->get_desktop_widget(); + if (dtw) { + dtw->desktop = this; + dtw->updateNamedview(); + } else { + std::cerr << "SPDesktop::change_document: failed to get desktop widget!" << std::endl; + } + +} + +/** + * Replaces the currently active tool with a new one. Pass the empty string to + * unset and free the current tool. + */ +void SPDesktop::setEventContext(const std::string& toolName) +{ + // Tool should be able to be replaced with itself. See commit 29df5ca05d + if (event_context) { + delete event_context; + event_context = nullptr; + } + + if (!toolName.empty()) { + event_context = ToolFactory::createObject(this, toolName); + } + + _event_context_changed_signal.emit(this, event_context); +} + +/** + * Sets the coordinate status to a given point + */ +void +SPDesktop::set_coordinate_status (Geom::Point p) { + _widget->setCoordinateStatus(p); +} + +Inkscape::UI::Dialog::DialogContainer *SPDesktop::getContainer() +{ + return _widget->getDialogContainer(); +} + +/** + * \see SPDocument::getItemFromListAtPointBottom() + */ +SPItem *SPDesktop::getItemFromListAtPointBottom(const std::vector<SPItem*> &list, Geom::Point const &p) const +{ + g_return_val_if_fail (doc() != nullptr, NULL); + return SPDocument::getItemFromListAtPointBottom(dkey, doc()->getRoot(), list, p); +} + +/** + * \see SPDocument::getItemAtPoint() + */ +SPItem *SPDesktop::getItemAtPoint(Geom::Point const &p, bool into_groups, SPItem *upto) const +{ + g_return_val_if_fail (doc() != nullptr, NULL); + return doc()->getItemAtPoint( dkey, p, into_groups, upto); +} + +/** + * \see SPDocument::getGroupAtPoint() + */ +SPItem *SPDesktop::getGroupAtPoint(Geom::Point const &p) const +{ + g_return_val_if_fail (doc() != nullptr, NULL); + return doc()->getGroupAtPoint(dkey, p); +} + +/** + * Returns the mouse point in document coordinates; if mouse is + * outside the canvas, returns the center of canvas viewpoint. + */ +Geom::Point SPDesktop::point(bool outside_canvas) const +{ + Geom::Point p = _widget->window_get_pointer(); + Geom::Point pw = canvas->canvas_to_world(p); + Geom::Rect const r = canvas->get_area_world(); + + if (r.interiorContains(pw) || outside_canvas) { + p = w2d(pw); + return p; + } + Geom::Point r0 = w2d(r.min()); + Geom::Point r1 = w2d(r.max()); + return (r0 + r1) / 2.0; +} + + +/** + * Revert back to previous transform if possible. Note: current transform is + * always at front of stack. + */ +void +SPDesktop::prev_transform() +{ + if (transforms_past.empty()) { + std::cerr << "SPDesktop::prev_transform: current transform missing!" << std::endl; + return; + } + + if (transforms_past.size() == 1) { + messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No previous transform.")); + return; + } + + // Push current transform into future transforms list. + transforms_future.push_front( _current_affine ); + + // Remove the current transform from the past transforms list. + transforms_past.pop_front(); + + // restore previous transform + _current_affine = transforms_past.front(); + set_display_area (false); + +} + + +/** + * Set transform to next in list. + */ +void SPDesktop::next_transform() +{ + if (transforms_future.empty()) { + this->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No next transform.")); + return; + } + + // restore next transform + _current_affine = transforms_future.front(); + set_display_area (false); + + // remove the just-used transform from the future transforms list + transforms_future.pop_front(); + + // push current transform into past transforms list + transforms_past.push_front( _current_affine ); +} + + +/** + * Clear transform lists. + */ +void +SPDesktop::clear_transform_history() +{ + transforms_past.clear(); + transforms_future.clear(); +} + + +/** + * Does all the dirty work in setting the display area. + * _current_affine must already be full updated (including offset). + * log: if true, save transform in transform stack for reuse. + */ +void +SPDesktop::set_display_area (bool log) +{ + // Save the transform + if (log) { + transforms_past.push_front( _current_affine ); + // if we do a logged transform, our transform-forward list is invalidated, so delete it + transforms_future.clear(); + } + + // Scroll + Geom::Point offset = _current_affine.getOffset(); + canvas->set_pos(offset); + canvas->set_affine(_current_affine.d2w()); // For CanvasItem's. + + /* Update perspective lines if we are in the 3D box tool (so that infinite ones are shown + * correctly) */ + if (SP_IS_BOX3D_CONTEXT(event_context)) { + SP_BOX3D_CONTEXT(event_context)->_vpdrag->updateLines(); + } + + // Update GUI (TODO: should be handled by CanvasGrid). + _widget->update_rulers(); + _widget->update_scrollbars(_current_affine.getZoom()); + _widget->update_zoom(); + _widget->update_rotation(); + + signal_zoom_changed.emit(_current_affine.getZoom()); // Observed by path-manipulator to update arrows. +} + + +/** + * Map the drawing to the window so that 'c' lies at 'w' where where 'c' + * is a point on the canvas and 'w' is position in window in screen pixels. + */ +void +SPDesktop::set_display_area (Geom::Point const &c, Geom::Point const &w, bool log) +{ + // The relative offset needed to keep c at w. + Geom::Point offset = d2w(c) - w; + _current_affine.addOffset( offset ); + set_display_area( log ); +} + + +/** + * Map the center of rectangle 'r' (which specifies a non-rotated region of the + * drawing) to lie at the center of the window. The zoom factor is calculated such that + * the edges of 'r' closest to 'w' are 'border' length inside of the window (if + * there is no rotation). 'r' is in document pixel units, 'border' is in screen pixels. + */ +void +SPDesktop::set_display_area( Geom::Rect const &r, double border, bool log) +{ + // Create a rectangle the size of the window aligned with origin. + Geom::Rect w( Geom::Point(), canvas->get_dimensions() ); + + // Shrink window to account for border padding. + w.expandBy( -border ); + + double zoom = 1.0; + // Determine which direction limits scale: + // if (r.width/w.width > r.height/w.height) then zoom using width. + // Avoiding division in test: + if ( r.width()*w.height() > r.height()*w.width() ) { + zoom = w.width() / r.width(); + } else { + zoom = w.height() / r.height(); + } + zoom = CLAMP(zoom, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX); + _current_affine.setScale( Geom::Scale(zoom, yaxisdir() * zoom) ); + // Zero offset, actual offset calculated later. + _current_affine.setOffset( Geom::Point( 0, 0 ) ); + + set_display_area( r.midpoint(), w.midpoint(), log ); +} + + +/** + * Return canvas viewbox in desktop coordinates + */ +Geom::Parallelogram SPDesktop::get_display_area() const +{ + // viewbox in world coordinates + Geom::Rect const viewbox = canvas->get_area_world(); + + // display area in desktop coordinates + return Geom::Parallelogram(viewbox) * w2d(); +} + +/** + * Zoom to the given absolute zoom level + * + * @param center - Point we want to zoom in on + * @param zoom - Absolute amount of zoom (1.0 is 100%) + * @param keep_point - Keep center fixed in the desktop window. + */ +void +SPDesktop::zoom_absolute(Geom::Point const ¢er, double zoom, bool keep_point) +{ + Geom::Point w = d2w(center); // Must be before zoom changed. + if(!keep_point) { + w = canvas->get_area_world().midpoint(); + } + zoom = CLAMP (zoom, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX); + _current_affine.setScale( Geom::Scale(zoom, yaxisdir() * zoom) ); + set_display_area( center, w ); +} + +/** + * Zoom in or out relatively to the current zoom + * + * @param center - Point we want to zoom in on + * @param zoom - Relative amount of zoom. at 50% + 50% -> 25% zoom + * @param keep_point - Keep center fixed in the desktop window. + */ +void +SPDesktop::zoom_relative(Geom::Point const ¢er, double zoom, bool keep_point) +{ + double new_zoom = _current_affine.getZoom() * zoom; + this->zoom_absolute(center, new_zoom, keep_point); +} + +/** + * Zoom in to an absolute realworld ratio, e.g. 1:1 physical screen units + * + * @param center - Point we want to zoom in on. + * @param ratio - Absolute physical zoom ratio. + */ +void +SPDesktop::zoom_realworld(Geom::Point const ¢er, double ratio) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + double correction = prefs->getDouble("/options/zoomcorrection/value", 1.0); + this->zoom_absolute(center, ratio * correction, false); +} + + +/** + * Set display area in only the width dimension. + */ +void SPDesktop::set_display_width(Geom::Rect const &rect, Geom::Coord border) +{ + if (rect.width() < 1.0) + return; + auto const center_y = current_center().y(); + set_display_area(Geom::Rect( + Geom::Point(rect.left(), center_y), + Geom::Point(rect.width(), center_y)), border); +} + +/** + * Centre Rect, without zooming + */ +void SPDesktop::set_display_center(Geom::Rect const &rect) +{ + zoom_absolute(rect.midpoint(), this->current_zoom(), false); +} + +/** + * Zoom to whole drawing. + */ +void +SPDesktop::zoom_drawing() +{ + g_return_if_fail (doc() != nullptr); + SPItem *docitem = doc()->getRoot(); + g_return_if_fail (docitem != nullptr); + + docitem->bbox_valid = FALSE; + Geom::OptRect d = docitem->desktopVisualBounds(); + + /* Note that the second condition here indicates that + ** there are no items in the drawing. + */ + if ( !d || d->minExtent() < 0.1 ) { + return; + } + + set_display_area(*d, 10); +} + + +/** + * Zoom to selection. + */ +void +SPDesktop::zoom_selection() +{ + Geom::OptRect const d = selection->visualBounds(); + + if ( !d || d->minExtent() < 0.1 ) { + return; + } + + set_display_area(*d, 10); +} + +Geom::Point SPDesktop::current_center() const { + return Geom::Rect(canvas->get_area_world()).midpoint() * _current_affine.w2d(); +} + +/** + * Performs a quick zoom into what the user is working on. + * + * @param enable Whether we're going in or out of quick zoom. + */ +void SPDesktop::zoom_quick(bool enable) +{ + if (enable == _quick_zoom_enabled) { + return; + } + + if (enable) { + _quick_zoom_affine = _current_affine; + bool zoomed = false; + + // TODO This needs to migrate into the node tool, but currently the design + // of this method is sufficiently wrong to prevent this. + if (!zoomed && INK_IS_NODE_TOOL(event_context)) { + Inkscape::UI::Tools::NodeTool *nt = static_cast<Inkscape::UI::Tools::NodeTool*>(event_context); + if (!nt->_selected_nodes->empty()) { + Geom::Rect nodes = *nt->_selected_nodes->bounds(); + double area = nodes.area(); + // do not zoom if a single cusp node is selected aand the bounds + // have zero area. + if (!Geom::are_near(area, 0)) { + set_display_area(nodes, true); + zoomed = true; + } + } + } + + if (!zoomed) { + Geom::OptRect const d = selection->visualBounds(); + if (d) { + set_display_area(*d, true); + zoomed = true; + } + } + + if (!zoomed) { + Geom::Rect const d_canvas = canvas->get_area_world(); + Geom::Point midpoint = w2d(d_canvas.midpoint()); // Midpoint of drawing on canvas. + zoom_relative(midpoint, 2.0, false); + } + } else { + _current_affine = _quick_zoom_affine; + set_display_area( false ); + } + + _quick_zoom_enabled = enable; + return; +} + + +/** + * Tell widget to let zoom widget grab keyboard focus. + */ +void +SPDesktop::zoom_grab_focus() +{ + _widget->letZoomGrabFocus(); +} + + +/** + * Set new rotation, keeping the point 'c' fixed in the desktop window. + * + * @param c Point in desktop coordinates + * @param rotate Angle in clockwise direction + */ +void +SPDesktop::rotate_absolute_keep_point (Geom::Point const &c, double rotate) +{ + Geom::Point w = d2w( c ); // Must be before rotate changed. + _current_affine.setRotate( rotate ); + set_display_area( c, w ); +} + + +/** + * Rotate keeping the point 'c' fixed in the desktop window. + * + * @param c Point in desktop coordinates + * @param rotate Angle in clockwise direction + */ +void +SPDesktop::rotate_relative_keep_point (Geom::Point const &c, double rotate) +{ + Geom::Point w = d2w( c ); // Must be before rotate changed. + _current_affine.addRotate( rotate ); + set_display_area( c, w ); +} + + +/** + * Set new rotation, aligning the point 'c' to the center of desktop window. + * + * @param c Point in desktop coordinates + * @param rotate Angle in clockwise direction + */ +void +SPDesktop::rotate_absolute_center_point (Geom::Point const &c, double rotate) +{ + _current_affine.setRotate( rotate ); + Geom::Rect viewbox = canvas->get_area_world(); + set_display_area(c, viewbox.midpoint()); +} + + +/** + * Rotate aligning the point 'c' to the center of desktop window. + * + * @param c Point in desktop coordinates + * @param rotate Angle in clockwise direction + */ +void +SPDesktop::rotate_relative_center_point (Geom::Point const &c, double rotate) +{ + _current_affine.addRotate( rotate ); + Geom::Rect viewbox = canvas->get_area_world(); + set_display_area(c, viewbox.midpoint()); +} + +/** + * Set new flip direction, keeping the point 'c' fixed in the desktop window. + * + * @param c Point in desktop coordinates + * @param flip Direction the canvas will be set as. + */ +void +SPDesktop::flip_absolute_keep_point (Geom::Point const &c, CanvasFlip flip) +{ + Geom::Point w = d2w(c); // Must be before flip. + _current_affine.setFlip(flip); + set_display_area(c, w); +} + + +/** + * Flip direction, keeping the point 'c' fixed in the desktop window. + * + * @param c Point in desktop coordinates + * @param flip Direction to flip canvas + */ +void +SPDesktop::flip_relative_keep_point (Geom::Point const &c, CanvasFlip flip) +{ + Geom::Point w = d2w(c); // Must be before flip. + _current_affine.addFlip(flip); + set_display_area(c, w); +} + + +/** + * Set new flip direction, aligning the point 'c' to the center of desktop window. + * + * @param c Point in desktop coordinates + * @param flip Direction the canvas will be set as. + */ +void +SPDesktop::flip_absolute_center_point (Geom::Point const &c, CanvasFlip flip) +{ + _current_affine.setFlip(flip); + Geom::Rect viewbox = canvas->get_area_world(); + set_display_area(c, viewbox.midpoint()); +} + + +/** + * Flip direction, aligning the point 'c' to the center of desktop window. + * + * @param c Point in desktop coordinates + * @param flip Direction to flip canvas + */ +void +SPDesktop::flip_relative_center_point (Geom::Point const &c, CanvasFlip flip) +{ + _current_affine.addFlip(flip); + Geom::Rect viewbox = canvas->get_area_world(); + set_display_area(c, viewbox.midpoint()); +} + +bool +SPDesktop::is_flipped (CanvasFlip flip) +{ + return _current_affine.isFlipped(flip); +} + + +/** + * Scroll canvas by to a particular point (window coordinates). + */ +void +SPDesktop::scroll_absolute (Geom::Point const &point, bool is_scrolling) +{ + canvas->set_pos(point); + _current_affine.setOffset( point ); + + /* update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */ + //sp_box3d_context_update_lines(event_context); + if (SP_IS_BOX3D_CONTEXT(event_context)) { + SP_BOX3D_CONTEXT(event_context)->_vpdrag->updateLines(); + } + + _widget->update_rulers(); + _widget->update_scrollbars(_current_affine.getZoom()); +} + + +/** + * Scroll canvas by specific coordinate amount (window coordinates). + */ +void +SPDesktop::scroll_relative (Geom::Point const &delta, bool is_scrolling) +{ + Geom::Rect const viewbox = canvas->get_area_world(); + scroll_absolute( viewbox.min() - delta, is_scrolling ); +} + + +/** + * Scroll canvas by specific coordinate amount in svg coordinates. + */ +void +SPDesktop::scroll_relative_in_svg_coords (double dx, double dy, bool is_scrolling) +{ + double scale = _current_affine.getZoom(); + scroll_relative(Geom::Point(dx*scale, dy*scale), is_scrolling); +} + + +/** + * Scroll screen so as to keep point 'p' visible in window. + * (Used, for example, when a node is being dragged.) + * 'p': The point in desktop coordinates. + * 'autoscrollspeed': The scroll speed (or zero to use preferences' value). + */ +bool +SPDesktop::scroll_to_point (Geom::Point const &p, gdouble autoscrollspeed) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + // autoscrolldistance is in screen pixels. + gdouble autoscrolldistance = (gdouble) prefs->getIntLimited("/options/autoscrolldistance/value", 0, -1000, 10000); + + Geom::Rect w = canvas->get_area_world(); // Window in screen coordinates. + w.expandBy(-autoscrolldistance); // Shrink window + + Geom::Point c = d2w(p); // Point 'p' in screen coordinates. + if (!w.contains(c)) { + + Geom::Point c2 = w.clamp(c); // Constrain c to window. + + if (autoscrollspeed == 0) + autoscrollspeed = prefs->getDoubleLimited("/options/autoscrollspeed/value", 1, 0, 10); + + if (autoscrollspeed != 0) + scroll_relative (autoscrollspeed * (c2 - c) ); + + return true; + } + return false; +} + +bool +SPDesktop::is_iconified() +{ + return 0!=(window_state & GDK_WINDOW_STATE_ICONIFIED); +} + +void +SPDesktop::iconify() +{ + _widget->iconify(); +} + +bool SPDesktop::is_darktheme() { return getToplevel()->get_style_context()->has_class("dark"); } + +bool +SPDesktop::is_maximized() +{ + return 0!=(window_state & GDK_WINDOW_STATE_MAXIMIZED); +} + +void +SPDesktop::maximize() +{ + _widget->maximize(); +} + +bool +SPDesktop::is_fullscreen() +{ + return 0!=(window_state & GDK_WINDOW_STATE_FULLSCREEN); +} + +void +SPDesktop::fullscreen() +{ + _widget->fullscreen(); +} + +/** + * Checks to see if the user is working in focused mode. + * + * @return the value of \c _focusMode. + */ +bool SPDesktop::is_focusMode() +{ + return _focusMode; +} + +/** + * Changes whether the user is in focus mode or not. + * + * @param mode Which mode the view should be in. + */ +void SPDesktop::focusMode(bool mode) +{ + if (mode == _focusMode) { return; } + + _focusMode = mode; + + layoutWidget(); + //sp_desktop_widget_layout(SPDesktopWidget); + + return; +} + +void +SPDesktop::setWindowTitle() +{ + _widget->updateTitle(doc()->getDocumentName()); +} + +void +SPDesktop::getWindowGeometry (gint &x, gint &y, gint &w, gint &h) +{ + _widget->getWindowGeometry (x, y, w, h); +} + +void +SPDesktop::setWindowPosition (Geom::Point p) +{ + _widget->setWindowPosition (p); +} + +void +SPDesktop::setWindowSize (gint w, gint h) +{ + _widget->setWindowSize (w, h); +} + +void +SPDesktop::setWindowTransient (void *p, int transient_policy) +{ + _widget->setWindowTransient (p, transient_policy); +} + +Gtk::Window* +SPDesktop::getToplevel( ) +{ + return _widget->window; +} + +InkscapeWindow* +SPDesktop::getInkscapeWindow( ) +{ + return dynamic_cast<InkscapeWindow*>(_widget->window); +} + +void +SPDesktop::presentWindow() +{ + _widget->presentWindow(); +} + +bool SPDesktop::showInfoDialog( Glib::ustring const & message ) +{ + return _widget->showInfoDialog( message ); +} + +bool +SPDesktop::warnDialog (Glib::ustring const &text) +{ + return _widget->warnDialog (text); +} + +void +SPDesktop::toggleCommandPalette() { + _widget->toggle_command_palette(); +} +void +SPDesktop::toggleRulers() +{ + _widget->toggle_rulers(); +} + +void +SPDesktop::toggleScrollbars() +{ + _widget->toggle_scrollbars(); +} + +void SPDesktop::toggleToolbar(gchar const *toolbar_name) +{ + Glib::ustring pref_path = getLayoutPrefPath(this) + toolbar_name + "/state"; + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + gboolean visible = prefs->getBool(pref_path, true); + prefs->setBool(pref_path, !visible); + + layoutWidget(); +} + +void +SPDesktop::layoutWidget() +{ + _widget->layoutWidgets(); +} + +/** + * onWindowStateEvent + * + * Called when the window changes its maximize/fullscreen/iconify/pinned state. + * Since GTK doesn't have a way to query this state information directly, we + * record it for the desktop here, and also possibly trigger a layout. + */ +bool +SPDesktop::onWindowStateEvent (GdkEventWindowState* event) +{ + // Record the desktop window's state + window_state = event->new_window_state; + + // Layout may differ depending on full-screen mode or not + GdkWindowState changed = event->changed_mask; + if (changed & (GDK_WINDOW_STATE_FULLSCREEN|GDK_WINDOW_STATE_MAXIMIZED)) { + layoutWidget(); + view_set_gui(getInkscapeWindow()); // Updates View menu + } + + return false; +} + + +/** + * Apply the desktop's current style or the tool style to the object. + */ +void SPDesktop::applyCurrentOrToolStyle(SPObject *obj, Glib::ustring const &tool_path, bool with_text) +{ + SPCSSAttr *css_current = sp_desktop_get_style(this, with_text); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + if (prefs->getBool(tool_path + "/usecurrent") && css_current) { + obj->setCSS(css_current,"style"); + } else { + SPCSSAttr *css = prefs->getInheritedStyle(tool_path + "/style"); + obj->setCSS(css,"style"); + sp_repr_css_attr_unref(css); + } + if (css_current) { + sp_repr_css_attr_unref(css_current); + } +} + + +void +SPDesktop::setToolboxFocusTo (gchar const *label) +{ + _widget->setToolboxFocusTo (label); +} + +void +SPDesktop::setToolboxAdjustmentValue (gchar const* id, double val) +{ + _widget->setToolboxAdjustmentValue (id, val); +} + +Gtk::Toolbar* +SPDesktop::get_toolbar_by_name(const Glib::ustring& name) +{ + return _widget->get_toolbar_by_name(name); +} + +Gtk::Widget *SPDesktop::get_toolbox() const +{ + return _widget->get_tool_toolbox(); +} + +bool +SPDesktop::isToolboxButtonActive (gchar const *id) +{ + return _widget->isToolboxButtonActive (id); +} + +void +SPDesktop::emitToolSubselectionChanged(gpointer data) +{ + emitToolSubselectionChangedEx(data, nullptr); +} + +void SPDesktop::emitToolSubselectionChangedEx(gpointer data, SPObject* object) { + _tool_subselection_changed.emit(data, object); +} + +sigc::connection SPDesktop::connectToolSubselectionChanged(const sigc::slot<void, gpointer>& slot) { + return _tool_subselection_changed.connect([=](gpointer ptr, SPObject*) { slot(ptr); }); +} + +sigc::connection SPDesktop::connectToolSubselectionChangedEx(const sigc::slot<void, gpointer, SPObject*>& slot) { + return _tool_subselection_changed.connect(slot); +} + +void SPDesktop::updateDialogs() +{ + getContainer()->set_inkscape_window(getInkscapeWindow()); +} + +void +SPDesktop::enableInteraction() +{ + _widget->enableInteraction(); +} + +void SPDesktop::disableInteraction() +{ + _widget->disableInteraction(); +} + +void SPDesktop::setWaitingCursor() +{ + auto window = canvas->get_window(); + if (!window) { + return; + } + Glib::RefPtr<Gdk::Display> display = Gdk::Display::get_default(); + Glib::RefPtr<Gdk::Cursor> waiting = Gdk::Cursor::create(display, "wait"); + window->set_cursor(waiting); + // GDK needs the flush for the cursor change to take effect + display->flush(); + waiting_cursor = true; +} + +void SPDesktop::clearWaitingCursor() { + if (waiting_cursor && this->event_context) { + this->event_context->use_tool_cursor(); + } +} + +void SPDesktop::toggleColorProfAdjust() +{ + _widget->toggle_color_prof_adj(); +} + +void SPDesktop::toggleLockGuides() +{ + namedview->toggleLockGuides(); +} + +bool SPDesktop::colorProfAdjustEnabled() +{ + return _widget->get_color_prof_adj_enabled(); +} + +void SPDesktop::toggleGrids() +{ + if (! namedview->grids.empty()) { + showGrids(!grids_visible); + } else { + //there is no grid present at the moment. add a rectangular grid and make it visible + namedview->writeNewGrid(this->getDocument(), Inkscape::GRID_RECTANGULAR); + showGrids(true); + } +} + +void SPDesktop::showGrids(bool show, bool dirty_document) +{ + grids_visible = show; + sp_namedview_show_grids(namedview, grids_visible, dirty_document); + if (show) { + canvas_group_grids->show(); + } else { + canvas_group_grids->hide(); + } +} + +//---------------------------------------------------------------------- +// Callback implementations. The virtual ones are connected by the view. + +void +SPDesktop::onResized (double /*x*/, double /*y*/) +{ + // Nothing called here +} + +/** + * Redraw callback; queues Gtk redraw; connected by View. + */ +void +SPDesktop::onRedrawRequested () +{ + if (_widget) { + _widget->requestCanvasUpdate(); + } +} + +void +SPDesktop::updateCanvasNow() +{ + _widget->requestCanvasUpdateAndWait(); +} + +/** + * Associate document with desktop. + */ +void +SPDesktop::setDocument (SPDocument *doc) +{ + if (!doc) return; + + if (this->doc()) { + namedview->hide(this); + this->doc()->getRoot()->invoke_hide(dkey); + } + + selection->setDocument(doc); + + /// \todo fixme: This condition exists to make sure the code + /// inside is NOT called on initialization, only on replacement. But there + /// are surely more safe methods to accomplish this. + // TODO since the comment had reversed logic, check the intent of this block of code: + if (canvas_drawing) { + + namedview = doc->getNamedView(); + namedview->viewcount++; + + Inkscape::DrawingItem *drawing_item = doc->getRoot()->invoke_show( + *(canvas_drawing->get_drawing()), + dkey, + SP_ITEM_SHOW_DISPLAY); + if (drawing_item) { + canvas_drawing->get_drawing()->root()->prependChild(drawing_item); + } + + namedview->show(this); + /* Ugly hack */ + activate_guides (true); + } + + // set new document before firing signal, so handlers can see new value if they query desktop + View::setDocument(doc); + + _document_replaced_signal.emit (this, doc); +} + +void +SPDesktop::onStatusMessage +(Inkscape::MessageType type, gchar const *message) +{ + if (_widget) { + _widget->setMessage(type, message); + } +} + +void +SPDesktop::onDocumentFilenameSet (gchar const* filename) +{ + _widget->updateTitle(filename); +} + +/** + * Calls event handler of current event context. + */ +static bool +_drawing_handler (GdkEvent *event, Inkscape::DrawingItem *drawing_item, SPDesktop *desktop) +{ + if (event->type == GDK_KEY_PRESS && Inkscape::UI::Tools::get_latin_keyval(&event->key) == GDK_KEY_space && + desktop->event_context->is_space_panning()) + { + return true; + } + + if (auto ec = desktop->event_context) { + if (drawing_item) { + return ec->start_item_handler(drawing_item->getItem(), event); + } else { + return ec->start_root_handler(event); + } + } + return false; +} + +/// Called when document is starting to be rebuilt. +static void _reconstruction_start(SPDesktop * desktop) +{ + auto layer = desktop->layerManager().currentLayer(); + desktop->_reconstruction_old_layer_id = layer->getId() ? layer->getId() : ""; + desktop->layerManager().reset(); + + desktop->selection->clear(); +} + +/// Called when document rebuild is finished. +static void _reconstruction_finish(SPDesktop * desktop) +{ + g_debug("Desktop, finishing reconstruction\n"); + if ( !desktop->_reconstruction_old_layer_id.empty() ) { + SPObject * newLayer = desktop->namedview->document->getObjectById(desktop->_reconstruction_old_layer_id); + if (newLayer != nullptr) { + desktop->layerManager().setCurrentLayer(newLayer); + } + + desktop->_reconstruction_old_layer_id.clear(); + } + g_debug("Desktop, finishing reconstruction end\n"); +} + +Geom::Affine SPDesktop::w2d() const +{ + return _current_affine.w2d(); +} + +Geom::Point SPDesktop::w2d(Geom::Point const &p) const +{ + return p * _current_affine.w2d(); +} + +Geom::Point SPDesktop::d2w(Geom::Point const &p) const +{ + return p * _current_affine.d2w(); +} + +const Geom::Affine &SPDesktop::doc2dt() const +{ + g_assert(doc() != nullptr); + return doc()->doc2dt(); +} + +Geom::Affine SPDesktop::dt2doc() const +{ + g_assert(doc() != nullptr); + return doc()->dt2doc(); +} + +Geom::Point SPDesktop::doc2dt(Geom::Point const &p) const +{ + return p * doc2dt(); +} + +Geom::Point SPDesktop::dt2doc(Geom::Point const &p) const +{ + return p * dt2doc(); +} + +sigc::connection SPDesktop::connect_gradient_stop_selected(const sigc::slot<void, void*, SPStop*>& slot) { + return _gradient_stop_selected.connect(slot); +} + +sigc::connection SPDesktop::connect_control_point_selected(const sigc::slot<void, void*, Inkscape::UI::ControlPointSelection*>& slot) { + return _control_point_selected.connect(slot); +} + +sigc::connection SPDesktop::connect_text_cursor_moved(const sigc::slot<void, void*, Inkscape::UI::Tools::TextTool*>& slot) { + return _text_cursor_moved.connect(slot); +} + +void SPDesktop::emit_gradient_stop_selected(void* sender, SPStop* stop) { + _gradient_stop_selected.emit(sender, stop); +} + +void SPDesktop::emit_control_point_selected(void* sender, Inkscape::UI::ControlPointSelection* selection) { + _control_point_selected.emit(sender, selection); +} + +void SPDesktop::emit_text_cursor_moved(void* sender, Inkscape::UI::Tools::TextTool* tool) { + _text_cursor_moved.emit(sender, tool); +} + +/* + * Pop event context from desktop's context stack. Never used. + */ +// void +// SPDesktop::pop_event_context (unsigned int key) +// { +// ToolBase *ec = NULL; +// +// if (event_context && event_context->key == key) { +// g_return_if_fail (event_context); +// g_return_if_fail (event_context->next); +// ec = event_context; +// sp_event_context_deactivate (ec); +// event_context = ec->next; +// sp_event_context_activate (event_context); +// _event_context_changed_signal.emit (this, ec); +// } +// +// ToolBase *ref = event_context; +// while (ref && ref->next && ref->next->key != key) +// ref = ref->next; +// +// if (ref && ref->next) { +// ec = ref->next; +// ref->next = ec->next; +// } +// +// if (ec) { +// sp_event_context_finish (ec); +// g_object_unref (G_OBJECT (ec)); +// } +// } + +/* + 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 : |