#define __SP_DESKTOP_C__

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <glibmm/i18n.h>

#include <sigc++/functors/mem_fun.h>

#include <gtkmm.h>

#include <2geom/rect.h>

#include "macros.h"

#include "inkscape-private.h"

#include "desktop.h"

#include "desktop-events.h"

#include "desktop-handles.h"

#include "document.h"

#include "message-stack.h"

#include "selection.h"

#include "select-context.h"

#include "sp-namedview.h"

#include "color.h"

#include "sp-item-group.h"

#include "preferences.h"

#include "object-hierarchy.h"

#include "helper/units.h"

#include "display/canvas-arena.h"

#include "display/nr-arena.h"

#include "display/gnome-canvas-acetate.h"

#include "display/sodipodi-ctrlrect.h"

#include "display/sp-canvas-util.h"

#include "display/canvas-temporary-item-list.h"

#include "display/snap-indicator.h"

#include "ui/dialog/dialog-manager.h"

#include "xml/repr.h"

#include "message-context.h"

#include "device-manager.h"

#include "layer-fns.h"

#include "layer-manager.h"

#include "event-log.h"

#include "display/canvas-grid.h"

#include "widgets/desktop-widget.h"

#include "box3d-context.h"

#include "ui/tool/node-tool.h"

#include "ui/tool/control-point-selection.h"

#include "display/sp-canvas.h"

namespace Inkscape { namespace XML { class Node; }}

static void _onSelectionChanged (Inkscape::Selection *selection, SPDesktop *desktop);

static gint _arena_handler (SPCanvasArena *arena, NRArenaItem *ai, GdkEvent *event, SPDesktop *desktop);

static void _layer_activated(SPObject *layer, SPDesktop *desktop);

static void _layer_deactivated(SPObject *layer, SPDesktop *desktop);

static void _layer_hierarchy_changed(SPObject *top, SPObject *bottom, SPDesktop *desktop);

static void _reconstruction_start(SPDesktop * desktop);

static void _reconstruction_finish(SPDesktop * desktop);

static void _namedview_modified (SPObject *obj, guint flags, SPDesktop *desktop);

SPDesktop::SPDesktop() :

_dlg_mgr( 0 ),

namedview( 0 ),

canvas( 0 ),

selection( 0 ),

event_context( 0 ),

layer_manager( 0 ),

event_log( 0 ),

temporary_item_list( 0 ),

snapindicator( 0 ),

acetate( 0 ),

main( 0 ),

gridgroup( 0 ),

guides( 0 ),

drawing( 0 ),

sketch( 0 ),

controls( 0 ),

tempgroup ( 0 ),

table( 0 ),

page( 0 ),

page_border( 0 ),

current( 0 ),

_focusMode(false),

zooms_past( 0 ),

zooms_future( 0 ),

dkey( 0 ),

number( 0 ),

window_state(0),

interaction_disabled_counter( 0 ),

waiting_cursor( false ),

guides_active( false ),

gr_item( 0 ),

gr_point_type( 0 ),

gr_point_i( 0 ),

gr_fill_or_stroke( true ),

_layer_hierarchy( 0 ),

_reconstruction_old_layer_id( 0 ),

_display_mode(Inkscape::RENDERMODE_NORMAL),

_widget( 0 ),

_inkscape( 0 ),

_guides_message_context( 0 ),

_active( false ),

_w2d(),

_d2w(),

_doc2dt( Geom::Scale(1, -1) ),

grids_visible( false )

{

_d2w.setIdentity();

_w2d.setIdentity();

selection = Inkscape::GC::release( new Inkscape::Selection(this) );

}

SPDesktop::init (SPNamedView *nv, SPCanvas *aCanvas, Inkscape::UI::View::EditWidgetInterface *widget)

{

_widget = widget;

// Temporary workaround for link order issues:

Inkscape::DeviceManager::getManager().getDevices();

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

_guides_message_context = new Inkscape::MessageContext(const_cast<Inkscape::MessageStack*>(messageStack()));

current = prefs->getStyle("/desktop/style");

namedview = nv;

canvas = aCanvas;

SPDocument *document = SP_OBJECT_DOCUMENT (namedview);

/* Kill flicker */

sp_document_ensure_up_to_date (document);

/* Setup Dialog Manager */

_dlg_mgr = &Inkscape::UI::Dialog::DialogManager::getInstance();

dkey = sp_item_display_key_new (1);

/* Connect document */

setDocument (document);

number = namedview->getViewCount();

/* Setup Canvas */

g_object_set_data (G_OBJECT (canvas), "SPDesktop", this);

SPCanvasGroup *root = sp_canvas_root (canvas);

/* Setup adminstrative layers */

acetate = sp_canvas_item_new (root, GNOME_TYPE_CANVAS_ACETATE, NULL);

g_signal_connect (G_OBJECT (acetate), "event", G_CALLBACK (sp_desktop_root_handler), this);

main = (SPCanvasGroup *) sp_canvas_item_new (root, SP_TYPE_CANVAS_GROUP, NULL);

g_signal_connect (G_OBJECT (main), "event", G_CALLBACK (sp_desktop_root_handler), this);

table = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);

SP_CTRLRECT(table)->setRectangle(Geom::Rect(Geom::Point(-80000, -80000), Geom::Point(80000, 80000)));

SP_CTRLRECT(table)->setColor(0x00000000, true, 0x00000000);

sp_canvas_item_move_to_z (table, 0);

page = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);

((CtrlRect *) page)->setColor(0x00000000, FALSE, 0x00000000);

page_border = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);

drawing = sp_canvas_item_new (main, SP_TYPE_CANVAS_ARENA, NULL);

g_signal_connect (G_OBJECT (drawing), "arena_event", G_CALLBACK (_arena_handler), this);

SP_CANVAS_ARENA (drawing)->arena->delta = prefs->getDouble("/options/cursortolerance/value", 1.0); // default is 1 px

if (prefs->getBool("/options/startmode/outline")) {

// Start in outline mode

setDisplayModeOutline();

} else {

// Start in normal mode, default

setDisplayModeNormal();

}

// 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)

gridgroup = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);

guides = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);

sketch = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);

tempgroup = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);

controls = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);

/* Push select tool to the bottom of stack */

/** \todo

push_event_context (SP_TYPE_SELECT_CONTEXT, "/tools/select", SP_EVENT_CONTEXT_STATIC);

// display rect and zoom are now handled in sp_desktop_widget_realize()

Geom::Rect const d(Geom::Point(0.0, 0.0),

Geom::Point(sp_document_width(document), sp_document_height(document)));

SP_CTRLRECT(page)->setRectangle(d);

SP_CTRLRECT(page_border)->setRectangle(d);

/* the following sets the page shadow on the canvas

if ( namedview->pageshadow != 0 && namedview->showpageshadow ) {

SP_CTRLRECT(page_border)->setShadow(namedview->pageshadow, 0x3f3f3fff);

}

/* Connect event for page resize */

_doc2dt[5] = sp_document_height (document);

sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (drawing), _doc2dt);

_modified_connection = namedview->connectModified(sigc::bind<2>(sigc::ptr_fun(&_namedview_modified), this));

NRArenaItem *ai = sp_item_invoke_show (SP_ITEM (sp_document_root (document)),

SP_CANVAS_ARENA (drawing)->arena,

dkey,

SP_ITEM_SHOW_DISPLAY);

if (ai) {

nr_arena_item_add_child (SP_CANVAS_ARENA (drawing)->root, ai, NULL);

}

namedview->show(this);

/* Ugly hack */

activate_guides (true);

/* Ugly hack */

_namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);

_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 = NULL;

// ?

// sp_active_desktop_set (desktop);

_inkscape = INKSCAPE;

_activate_connection = _activate_signal.connect(

sigc::bind(

sigc::ptr_fun(_onActivate),

this

)

);

_deactivate_connection = _deactivate_signal.connect(

sigc::bind(

sigc::ptr_fun(_onDeactivate),

this

)

);

_sel_modified_connection = selection->connectModified(

sigc::bind(

sigc::ptr_fun(&_onSelectionModified),

this

)

);

_sel_changed_connection = selection->connectChanged(

sigc::bind(

sigc::ptr_fun(&_onSelectionChanged),

this

)

);

/* setup LayerManager */

// (Setting up after the connections are all in place, as it may use some of them)

layer_manager = new Inkscape::LayerManager( this );

showGrids(namedview->grids_visible, false);

temporary_item_list = new Inkscape::Display::TemporaryItemList( this );

snapindicator = new Inkscape::Display::SnapIndicator ( this );

}

void SPDesktop::destroy()

{

if (snapindicator) {

delete snapindicator;

snapindicator = NULL;

}

if (temporary_item_list) {

delete temporary_item_list;

temporary_item_list = NULL;

}

if (selection) {

delete selection;

selection = NULL;

}

namedview->hide(this);

_activate_connection.disconnect();

_deactivate_connection.disconnect();

_sel_modified_connection.disconnect();

_sel_changed_connection.disconnect();

_modified_connection.disconnect();

_commit_connection.disconnect();

_reconstruction_start_connection.disconnect();

_reconstruction_finish_connection.disconnect();

g_signal_handlers_disconnect_by_func(G_OBJECT (acetate), (gpointer) G_CALLBACK(sp_desktop_root_handler), this);

g_signal_handlers_disconnect_by_func(G_OBJECT (main), (gpointer) G_CALLBACK(sp_desktop_root_handler), this);

g_signal_handlers_disconnect_by_func(G_OBJECT (drawing), (gpointer) G_CALLBACK(_arena_handler), this);

while (event_context) {

SPEventContext *ec = event_context;

event_context = ec->next;

sp_event_context_finish (ec);

g_object_unref (G_OBJECT (ec));

}

if (_layer_hierarchy) {

delete _layer_hierarchy;

}

if (layer_manager) {

delete layer_manager;

layer_manager = NULL;

}

if (_inkscape) {

_inkscape = NULL;

}

if (drawing) {

sp_item_invoke_hide (SP_ITEM (sp_document_root (doc())), dkey);

drawing = NULL;

}

delete _guides_message_context;

_guides_message_context = NULL;

g_list_free (zooms_past);

g_list_free (zooms_future);

}

SPDesktop::~SPDesktop() {}

Inkscape::Display::TemporaryItem *

SPDesktop::add_temporary_canvasitem (SPCanvasItem *item, guint lifetime, bool move_to_bottom)

{

if (move_to_bottom) {

sp_canvas_item_move_to_z(item, 0);

}

return temporary_item_list->add_item(item, lifetime);

}

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::_setDisplayMode(Inkscape::RenderMode mode) {

SP_CANVAS_ARENA (drawing)->arena->rendermode = mode;

canvas->rendermode = mode;

_display_mode = mode;

sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (main), _d2w); // redraw

_widget->setTitle(SP_DOCUMENT_NAME(sp_desktop_document(this)));

}

void SPDesktop::displayModeToggle() {

switch (_display_mode) {

case Inkscape::RENDERMODE_NORMAL:

_setDisplayMode(Inkscape::RENDERMODE_NO_FILTERS);

break;

case Inkscape::RENDERMODE_NO_FILTERS:

_setDisplayMode(Inkscape::RENDERMODE_OUTLINE);

break;

case Inkscape::RENDERMODE_OUTLINE:

_setDisplayMode(Inkscape::RENDERMODE_PRINT_COLORS_PREVIEW);

break;

case Inkscape::RENDERMODE_PRINT_COLORS_PREVIEW:

default:

_setDisplayMode(Inkscape::RENDERMODE_NORMAL);

}

}

SPObject *SPDesktop::currentRoot() const

{

return _layer_hierarchy ? _layer_hierarchy->top() : NULL;

}

SPObject *SPDesktop::currentLayer() const

{

return _layer_hierarchy ? _layer_hierarchy->bottom() : NULL;

}

void SPDesktop::setCurrentLayer(SPObject *object) {

g_return_if_fail(SP_IS_GROUP(object));

g_return_if_fail( currentRoot() == object || (currentRoot() && currentRoot()->isAncestorOf(object)) );

// printf("Set Layer to ID: %s\n", SP_OBJECT_ID(object));

_layer_hierarchy->setBottom(object);

}

void SPDesktop::toggleLayerSolo(SPObject *object) {

g_return_if_fail(SP_IS_GROUP(object));

g_return_if_fail( currentRoot() == object || (currentRoot() && currentRoot()->isAncestorOf(object)) );

bool othersShowing = false;

std::vector<SPObject*> layers;

for ( SPObject* obj = Inkscape::next_layer(currentRoot(), object); obj; obj = Inkscape::next_layer(currentRoot(), obj) ) {

layers.push_back(obj);

othersShowing |= !SP_ITEM(obj)->isHidden();

}

for ( SPObject* obj = Inkscape::previous_layer(currentRoot(), object); obj; obj = Inkscape::previous_layer(currentRoot(), obj) ) {

layers.push_back(obj);

othersShowing |= !SP_ITEM(obj)->isHidden();

}

if ( SP_ITEM(object)->isHidden() ) {

SP_ITEM(object)->setHidden(false);

}

for ( std::vector<SPObject*>::iterator it = layers.begin(); it != layers.end(); ++it ) {

SP_ITEM(*it)->setHidden(othersShowing);

}

}

SPObject *SPDesktop::layerForObject(SPObject *object) {

g_return_val_if_fail(object != NULL, NULL);

SPObject *root=currentRoot();

object = SP_OBJECT_PARENT(object);

while ( object && object != root && !isLayer(object) ) {

object = SP_OBJECT_PARENT(object);

}

return object;

}

bool SPDesktop::isLayer(SPObject *object) const {

return ( SP_IS_GROUP(object)

&& ( SP_GROUP(object)->effectiveLayerMode(this->dkey)

== SPGroup::LAYER ) );

}

bool SPDesktop::isWithinViewport (SPItem *item) const

{

Geom::Rect const viewport = get_display_area();

Geom::OptRect const bbox = sp_item_bbox_desktop(item);

if (bbox) {

return viewport.contains(*bbox);

} else {

return true;

}

}

bool SPDesktop::itemIsHidden(SPItem const *item) const {

return item->isHidden(this->dkey);

}

SPDesktop::set_active (bool new_active)

{

if (new_active != _active) {

_active = new_active;

if (new_active) {

_activate_signal.emit();

} else {

_deactivate_signal.emit();

}

}

}

SPDesktop::activate_guides(bool activate)

{

guides_active = activate;

namedview->activateGuides(this, activate);

}

SPDesktop::change_document (SPDocument *theDocument)

{

g_return_if_fail (theDocument != NULL);

/* unselect everything before switching documents */

selection->clear();

setDocument (theDocument);

/* update the rulers, connect the desktop widget's signal to the new namedview etc.

Gtk::Window *parent = this->getToplevel();

g_assert(parent != NULL);

SPDesktopWidget *dtw = (SPDesktopWidget *) parent->get_data("desktopwidget");

if (dtw) {

dtw->desktop = this;

}

dtw->updateNamedview();

_namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);

_document_replaced_signal.emit (this, theDocument);

}

SPDesktop::set_event_context (GtkType type, const gchar *config)

{

SPEventContext *ec;

while (event_context) {

ec = event_context;

sp_event_context_deactivate (ec);

// we have to keep event_context valid during destruction - otherwise writing

// destructors is next to impossible

SPEventContext *next = ec->next;

sp_event_context_finish (ec);

g_object_unref (G_OBJECT (ec));

event_context = next;

}

ec = sp_event_context_new (type, this, config, SP_EVENT_CONTEXT_STATIC);

ec->next = event_context;

event_context = ec;

sp_event_context_activate (ec);

_event_context_changed_signal.emit (this, ec);

}

SPDesktop::push_event_context (GtkType type, const gchar *config, unsigned int key)

{

SPEventContext *ref, *ec;

if (event_context && event_context->key == key) return;

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;

sp_event_context_finish (ec);

g_object_unref (G_OBJECT (ec));

}

if (event_context) sp_event_context_deactivate (event_context);

ec = sp_event_context_new (type, this, config, key);

ec->next = event_context;

event_context = ec;

sp_event_context_activate (ec);

_event_context_changed_signal.emit (this, ec);

}

SPDesktop::set_coordinate_status (Geom::Point p) {

_widget->setCoordinateStatus(p);

}

SPItem *

SPDesktop::item_from_list_at_point_bottom (const GSList *list, Geom::Point const p) const

{

g_return_val_if_fail (doc() != NULL, NULL);

return sp_document_item_from_list_at_point_bottom (dkey, SP_GROUP (doc()->root), list, p);

}

SPItem *

SPDesktop::item_at_point (Geom::Point const p, bool into_groups, SPItem *upto) const

{

g_return_val_if_fail (doc() != NULL, NULL);

return sp_document_item_at_point (doc(), dkey, p, into_groups, upto);

}

SPItem *

SPDesktop::group_at_point (Geom::Point const p) const

{

g_return_val_if_fail (doc() != NULL, NULL);

return sp_document_group_at_point (doc(), dkey, p);

}

Geom::Point

SPDesktop::point() const

{

Geom::Point p = _widget->getPointer();

Geom::Point pw = sp_canvas_window_to_world (canvas, p);

p = w2d(pw);

Geom::Rect const r = canvas->getViewbox();

Geom::Point r0 = w2d(r.min());

Geom::Point r1 = w2d(r.max());

if (p[Geom::X] >= r0[Geom::X] &&

p[Geom::X] <= r1[Geom::X] &&

p[Geom::Y] >= r1[Geom::Y] &&

p[Geom::Y] <= r0[Geom::Y])

{

return p;

} else {

return (r0 + r1) / 2;

}

}

SPDesktop::push_current_zoom (GList **history)

{

Geom::Rect const area = get_display_area();

NRRect *old_zoom = g_new(NRRect, 1);

old_zoom->x0 = area.min()[Geom::X];

old_zoom->x1 = area.max()[Geom::X];

old_zoom->y0 = area.min()[Geom::Y];

old_zoom->y1 = area.max()[Geom::Y];

if ( *history == NULL

|| !( ( ((NRRect *) ((*history)->data))->x0 == old_zoom->x0 ) &&

( ((NRRect *) ((*history)->data))->x1 == old_zoom->x1 ) &&

( ((NRRect *) ((*history)->data))->y0 == old_zoom->y0 ) &&

( ((NRRect *) ((*history)->data))->y1 == old_zoom->y1 ) ) )

{

*history = g_list_prepend (*history, old_zoom);

}

}

SPDesktop::set_display_area (double x0, double y0, double x1, double y1, double border, bool log)

{

g_assert(_widget);

// save the zoom

if (log) {

push_current_zoom(&zooms_past);

// if we do a logged zoom, our zoom-forward list is invalidated, so delete it

g_list_free (zooms_future);

zooms_future = NULL;

}

double const cx = 0.5 * (x0 + x1);

double const cy = 0.5 * (y0 + y1);

// FIXME: This 2geom idiom doesn't allow us to declare dbox const

Geom::Rect viewbox = canvas->getViewbox();

viewbox.expandBy(-border);

double scale = _d2w.descrim();

double newscale;

if (((x1 - x0) * viewbox.dimensions()[Geom::Y]) > ((y1 - y0) * viewbox.dimensions()[Geom::X])) {

newscale = viewbox.dimensions()[Geom::X] / (x1 - x0);

} else {

newscale = viewbox.dimensions()[Geom::Y] / (y1 - y0);

}

newscale = CLAMP(newscale, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX); // unit: 'screen pixels' per 'document pixels'

int clear = FALSE;

if (!NR_DF_TEST_CLOSE (newscale, scale, 1e-4 * scale)) {

// zoom changed - set new zoom factors

_d2w = Geom::Scale(newscale, -newscale);

_w2d = Geom::Scale(1/newscale, 1/-newscale);

sp_canvas_item_affine_absolute(SP_CANVAS_ITEM(main), _d2w);

clear = TRUE;

signal_zoom_changed.emit(_d2w.descrim());

}

/* Calculate top left corner (in document pixels) */

x0 = cx - 0.5 * viewbox.dimensions()[Geom::X] / newscale;

y1 = cy + 0.5 * viewbox.dimensions()[Geom::Y] / newscale;

/* Scroll */

sp_canvas_scroll_to (canvas, x0 * newscale - border, y1 * -newscale - border, clear);

/* 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);

_widget->updateRulers();

_widget->updateScrollbars(_d2w.descrim());

_widget->updateZoom();

}

void SPDesktop::set_display_area(Geom::Rect const &a, Geom::Coord b, bool log)

{

set_display_area(a.min()[Geom::X], a.min()[Geom::Y], a.max()[Geom::X], a.max()[Geom::Y], b, log);

}

Geom::Rect SPDesktop::get_display_area() const

{

Geom::Rect const viewbox = canvas->getViewbox();

double const scale = _d2w[0];

return Geom::Rect(Geom::Point(viewbox.min()[Geom::X] / scale, viewbox.max()[Geom::Y] / -scale),

Geom::Point(viewbox.max()[Geom::X] / scale, viewbox.min()[Geom::Y] / -scale));

}

SPDesktop::prev_zoom()

{

if (zooms_past == NULL) {

messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No previous zoom."));

return;

}

// push current zoom into forward zooms list

push_current_zoom (&zooms_future);

// restore previous zoom

set_display_area (((NRRect *) zooms_past->data)->x0,

((NRRect *) zooms_past->data)->y0,

((NRRect *) zooms_past->data)->x1,

((NRRect *) zooms_past->data)->y1,

0, false);

// remove the just-added zoom from the past zooms list

zooms_past = g_list_remove (zooms_past, ((NRRect *) zooms_past->data));

}

SPDesktop::next_zoom()

{

if (zooms_future == NULL) {

this->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No next zoom."));

return;

}

// push current zoom into past zooms list

push_current_zoom (&zooms_past);

// restore next zoom

set_display_area (((NRRect *) zooms_future->data)->x0,

((NRRect *) zooms_future->data)->y0,

((NRRect *) zooms_future->data)->x1,

((NRRect *) zooms_future->data)->y1,

0, false);

// remove the just-used zoom from the zooms_future list

zooms_future = g_list_remove (zooms_future, ((NRRect *) zooms_future->data));

}

SPDesktop::zoom_quick (bool enable)

{

if (enable == _quick_zoom_enabled) {

return;

}

if (enable == true) {

_quick_zoom_stored_area = get_display_area();

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)) {

InkNodeTool *nt = static_cast<InkNodeTool*>(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) && area * 2.0 < _quick_zoom_stored_area.area()) {

set_display_area(nodes, true);

zoomed = true;

}

}

}

if (!zoomed) {

Geom::OptRect const d = selection->bounds();

if (d && d->area() * 2.0 < _quick_zoom_stored_area.area()) {

set_display_area(*d, true);

zoomed = true;

}

}

if (!zoomed) {

zoom_relative(_quick_zoom_stored_area.midpoint()[Geom::X], _quick_zoom_stored_area.midpoint()[Geom::Y], 2.0);

zoomed = true;

}

} else {

set_display_area(_quick_zoom_stored_area, false);

}

_quick_zoom_enabled = enable;

return;

}

SPDesktop::zoom_absolute_keep_point (double cx, double cy, double px, double py, double zoom)

{

zoom = CLAMP (zoom, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX);

// maximum or minimum zoom reached, but there's no exact equality because of rounding errors;

// this check prevents "sliding" when trying to zoom in at maximum zoom;

/// \todo someone please fix calculations properly and remove this hack

if (fabs(_d2w.descrim() - zoom) < 0.0001*zoom && (fabs(SP_DESKTOP_ZOOM_MAX - zoom) < 0.01 || fabs(SP_DESKTOP_ZOOM_MIN - zoom) < 0.000001))

return;

Geom::Rect const viewbox = canvas->getViewbox();

double const width2 = viewbox.dimensions()[Geom::X] / zoom;

double const height2 = viewbox.dimensions()[Geom::Y] / zoom;

set_display_area(cx - px * width2,

cy - py * height2,

cx + (1 - px) * width2,

cy + (1 - py) * height2,

0.0);

}

SPDesktop::zoom_absolute (double cx, double cy, double zoom)

{

zoom_absolute_keep_point (cx, cy, 0.5, 0.5, zoom);

}

SPDesktop::zoom_relative_keep_point (double cx, double cy, double zoom)

{

Geom::Rect const area = get_display_area();

if (cx < area.min()[Geom::X]) {

cx = area.min()[Geom::X];

}

if (cx > area.max()[Geom::X]) {

cx = area.max()[Geom::X];

}

if (cy < area.min()[Geom::Y]) {

cy = area.min()[Geom::Y];

}

if (cy > area.max()[Geom::Y]) {

cy = area.max()[Geom::Y];

}

gdouble const scale = _d2w.descrim() * zoom;

double const px = (cx - area.min()[Geom::X]) / area.dimensions()[Geom::X];

double const py = (cy - area.min()[Geom::Y]) / area.dimensions()[Geom::Y];

zoom_absolute_keep_point(cx, cy, px, py, scale);

}

SPDesktop::zoom_relative (double cx, double cy, double zoom)

{

gdouble scale = _d2w.descrim() * zoom;

zoom_absolute (cx, cy, scale);

}

SPDesktop::zoom_page()

{

Geom::Rect d(Geom::Point(0, 0),

Geom::Point(sp_document_width(doc()), sp_document_height(doc())));

if (d.minExtent() < 1.0) {

return;

}

set_display_area(d, 10);

}

SPDesktop::zoom_page_width()

{

Geom::Rect const a = get_display_area();

if (sp_document_width(doc()) < 1.0) {

return;

}

Geom::Rect d(Geom::Point(0, a.midpoint()[Geom::Y]),

Geom::Point(sp_document_width(doc()), a.midpoint()[Geom::Y]));

set_display_area(d, 10);

}

SPDesktop::zoom_selection()

{

Geom::OptRect const d = selection->bounds();

if ( !d || d->minExtent() < 0.1 ) {

return;

}

set_display_area(*d, 10);

}

SPDesktop::zoom_grab_focus()

{

_widget->letZoomGrabFocus();

}

SPDesktop::zoom_drawing()

{

g_return_if_fail (doc() != NULL);

SPItem *docitem = SP_ITEM (sp_document_root (doc()));

g_return_if_fail (docitem != NULL);

Geom::OptRect d = sp_item_bbox_desktop(docitem);

/* Note that the second condition here indicates that

if ( !d || d->minExtent() < 0.1 ) {

return;

}

set_display_area(*d, 10);

}

SPDesktop::scroll_world_in_svg_coords (double dx, double dy, bool is_scrolling)

{

double scale = _d2w.descrim();

scroll_world(dx*scale, dy*scale, is_scrolling);

}

SPDesktop::scroll_world (double dx, double dy, bool is_scrolling)

{

g_assert(_widget);

Geom::Rect const viewbox = canvas->getViewbox();

sp_canvas_scroll_to(canvas, viewbox.min()[Geom::X] - dx, viewbox.min()[Geom::Y] - dy, FALSE, is_scrolling);

/* 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);

_widget->updateRulers();

_widget->updateScrollbars(_d2w.descrim());

}

SPDesktop::scroll_to_point (Geom::Point const &p, gdouble autoscrollspeed)

{

using Geom::X;

using Geom::Y;

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

gdouble autoscrolldistance = (gdouble) prefs->getIntLimited("/options/autoscrolldistance/value", 0, -1000, 10000);

// autoscrolldistance is in screen pixels, but the display area is in document units

autoscrolldistance /= _d2w.descrim();

// FIXME: This 2geom idiom doesn't allow us to declare dbox const

Geom::Rect dbox = get_display_area();

dbox.expandBy(-autoscrolldistance);

if (!(p[X] > dbox.min()[X] && p[X] < dbox.max()[X]) ||

!(p[Y] > dbox.min()[Y] && p[Y] < dbox.max()[Y]) ) {

Geom::Point const s_w( p * (Geom::Matrix)_d2w );

gdouble x_to;

if (p[X] < dbox.min()[X])

x_to = dbox.min()[X];

else if (p[X] > dbox.max()[X])

x_to = dbox.max()[X];

else

x_to = p[X];

gdouble y_to;

if (p[Y] < dbox.min()[Y])

y_to = dbox.min()[Y];

else if (p[Y] > dbox.max()[Y])

y_to = dbox.max()[Y];

else

y_to = p[Y];

Geom::Point const d_dt(x_to, y_to);

Geom::Point const d_w( d_dt * _d2w );

Geom::Point const moved_w( d_w - s_w );

if (autoscrollspeed == 0)

autoscrollspeed = prefs->getDoubleLimited("/options/autoscrollspeed/value", 1, 0, 10);

if (autoscrollspeed != 0)

scroll_world (autoscrollspeed * moved_w);

return true;

}

return false;

}

SPDesktop::is_iconified()

{

return 0!=(window_state & GDK_WINDOW_STATE_ICONIFIED);

}

SPDesktop::iconify()

{

_widget->setIconified();

}

SPDesktop::is_maximized()

{

return 0!=(window_state & GDK_WINDOW_STATE_MAXIMIZED);

}

SPDesktop::maximize()

{

_widget->setMaximized();

}

SPDesktop::is_fullscreen()

{

return 0!=(window_state & GDK_WINDOW_STATE_FULLSCREEN);

}

SPDesktop::fullscreen()

{

_widget->setFullscreen();

}

SPDesktop::is_focusMode()

{

return _focusMode;

}

SPDesktop::focusMode (bool mode)

{

if (mode == _focusMode) { return; }

_focusMode = mode;

layoutWidget();

//sp_desktop_widget_layout(SPDesktopWidget);

return;

}

SPDesktop::getWindowGeometry (gint &x, gint &y, gint &w, gint &h)

{

_widget->getGeometry (x, y, w, h);

}

SPDesktop::setWindowPosition (Geom::Point p)

{

_widget->setPosition (p);

}

SPDesktop::setWindowSize (gint w, gint h)

{

_widget->setSize (w, h);

}

SPDesktop::setWindowTransient (void *p, int transient_policy)

{

_widget->setTransient (p, transient_policy);

}

Gtk::Window*

SPDesktop::getToplevel( )

{

return _widget->getWindow();

}

SPDesktop::presentWindow()

{

_widget->present();

}

SPDesktop::warnDialog (gchar *text)

{

return _widget->warnDialog (text);

}

SPDesktop::toggleRulers()

{

_widget->toggleRulers();

}

SPDesktop::toggleScrollbars()

{

_widget->toggleScrollbars();

}

SPDesktop::layoutWidget()

{

_widget->layout();

}

SPDesktop::destroyWidget()

{

_widget->destroy();

}

SPDesktop::shutdown()

{

return _widget->shutdown();

}

bool SPDesktop::onDeleteUI (GdkEventAny*)

{

if(shutdown())

return true;

destroyWidget();

return false;

}

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();

}

return false;

}

SPDesktop::setToolboxFocusTo (gchar const *label)

{

_widget->setToolboxFocusTo (label);

}

SPDesktop::setToolboxAdjustmentValue (gchar const* id, double val)

{

_widget->setToolboxAdjustmentValue (id, val);

}

SPDesktop::setToolboxSelectOneValue (gchar const* id, gint val)

{

_widget->setToolboxSelectOneValue (id, val);

}

SPDesktop::isToolboxButtonActive (gchar const *id)

{

return _widget->isToolboxButtonActive (id);

}

SPDesktop::emitToolSubselectionChanged(gpointer data)

{

_tool_subselection_changed.emit(data);

inkscape_subselection_changed (this);

}

SPDesktop::updateNow()

{

sp_canvas_update_now(canvas);

}

SPDesktop::enableInteraction()

{

_widget->enableInteraction();

}

void SPDesktop::disableInteraction()

{

_widget->disableInteraction();

}

void SPDesktop::setWaitingCursor()

{

GdkCursor *waiting = gdk_cursor_new(GDK_WATCH);

gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(this))->window, waiting);

gdk_cursor_unref(waiting);

// GDK needs the flush for the cursor change to take effect

gdk_flush();

waiting_cursor = true;

}

void SPDesktop::clearWaitingCursor()

{

if (waiting_cursor)

sp_event_context_update_cursor(sp_desktop_event_context(this));

}

void SPDesktop::toggleColorProfAdjust()

{

_widget->toggleColorProfAdjust();

}

void SPDesktop::toggleGrids()

{

if (namedview->grids) {

if(gridgroup) {

showGrids(!grids_visible);

}

} else {

//there is no grid present at the moment. add a rectangular grid and make it visible

Inkscape::XML::Node *repr = SP_OBJECT_REPR(namedview);

Inkscape::CanvasGrid::writeNewGridToRepr(repr, sp_desktop_document(this), 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) {

sp_canvas_item_show(SP_CANVAS_ITEM(gridgroup));

} else {

sp_canvas_item_hide(SP_CANVAS_ITEM(gridgroup));

}

}

void SPDesktop::toggleSnapGlobal()

{

bool v = namedview->snap_manager.snapprefs.getSnapEnabledGlobally();

Inkscape::XML::Node *repr = SP_OBJECT_REPR(namedview);

sp_repr_set_boolean(repr, "inkscape:snap-global", !v);

}

SPDesktop::onPositionSet (double x, double y)

{

_widget->viewSetPosition (Geom::Point(x,y));

}

SPDesktop::onResized (double /*x*/, double /*y*/)

{

// Nothing called here

}

SPDesktop::onRedrawRequested ()

{

if (main) {

_widget->requestCanvasUpdate();

}

}

SPDesktop::updateCanvasNow()

{

_widget->requestCanvasUpdateAndWait();

}

SPDesktop::setDocument (SPDocument *doc)

{

if (this->doc() && doc) {

namedview->hide(this);

sp_item_invoke_hide (SP_ITEM (sp_document_root (this->doc())), dkey);

}

if (_layer_hierarchy) {

_layer_hierarchy->clear();

delete _layer_hierarchy;

}

_layer_hierarchy = new Inkscape::ObjectHierarchy(NULL);

_layer_hierarchy->connectAdded(sigc::bind(sigc::ptr_fun(_layer_activated), this));

_layer_hierarchy->connectRemoved(sigc::bind(sigc::ptr_fun(_layer_deactivated), this));

_layer_hierarchy->connectChanged(sigc::bind(sigc::ptr_fun(_layer_hierarchy_changed), this));

_layer_hierarchy->setTop(SP_DOCUMENT_ROOT(doc));

/* setup EventLog */

event_log = new Inkscape::EventLog(doc);

doc->addUndoObserver(*event_log);

_commit_connection.disconnect();

_commit_connection = doc->connectCommit(sigc::mem_fun(*this, &SPDesktop::updateNow));

/// \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 (drawing) {

NRArenaItem *ai = 0;

namedview = sp_document_namedview (doc, NULL);

_modified_connection = namedview->connectModified(sigc::bind<2>(sigc::ptr_fun(&_namedview_modified), this));

number = namedview->getViewCount();

ai = sp_item_invoke_show (SP_ITEM (sp_document_root (doc)),

SP_CANVAS_ARENA (drawing)->arena,

dkey,

SP_ITEM_SHOW_DISPLAY);

if (ai) {

nr_arena_item_add_child (SP_CANVAS_ARENA (drawing)->root, ai, NULL);

}

namedview->show(this);

/* Ugly hack */

activate_guides (true);

/* Ugly hack */

_namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);

}

_document_replaced_signal.emit (this, doc);

View::setDocument (doc);

}

SPDesktop::onStatusMessage

(Inkscape::MessageType type, gchar const *message)

{

if (_widget) {

_widget->setMessage(type, message);

}

}

SPDesktop::onDocumentURISet (gchar const* uri)

{

_widget->setTitle(uri);

}

SPDesktop::onDocumentResized (gdouble width, gdouble height)

{

_doc2dt[5] = height;

sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (drawing), _doc2dt);

Geom::Rect const a(Geom::Point(0, 0), Geom::Point(width, height));

SP_CTRLRECT(page)->setRectangle(a);

SP_CTRLRECT(page_border)->setRectangle(a);

}

SPDesktop::_onActivate (SPDesktop* dt)

{

if (!dt->_widget) return;

dt->_widget->activateDesktop();

}

SPDesktop::_onDeactivate (SPDesktop* dt)

{

if (!dt->_widget) return;

dt->_widget->deactivateDesktop();

}

SPDesktop::_onSelectionModified

(Inkscape::Selection */*selection*/, guint /*flags*/, SPDesktop *dt)

{

if (!dt->_widget) return;

dt->_widget->updateScrollbars (dt->_d2w.descrim());

}

static void

(Inkscape::Selection *selection, SPDesktop *desktop)

{

/** \todo

SPItem *item=selection->singleItem();

if (item) {

SPObject *layer=desktop->layerForObject(item);

if ( layer && layer != desktop->currentLayer() ) {

desktop->setCurrentLayer(layer);

}

}

}

static gint

_arena_handler (SPCanvasArena */*arena*/, NRArenaItem *ai, GdkEvent *event, SPDesktop *desktop)

{

if (ai) {

SPItem *spi = (SPItem*)NR_ARENA_ITEM_GET_DATA (ai);

return sp_event_context_item_handler (desktop->event_context, spi, event);

} else {

return sp_event_context_root_handler (desktop->event_context, event);

}

}

static void

_layer_activated(SPObject *layer, SPDesktop *desktop) {

g_return_if_fail(SP_IS_GROUP(layer));

SP_GROUP(layer)->setLayerDisplayMode(desktop->dkey, SPGroup::LAYER);

}

static void

_layer_deactivated(SPObject *layer, SPDesktop *desktop) {

g_return_if_fail(SP_IS_GROUP(layer));

SP_GROUP(layer)->setLayerDisplayMode(desktop->dkey, SPGroup::GROUP);

}

static void

_layer_hierarchy_changed(SPObject */*top*/, SPObject *bottom,

SPDesktop *desktop)

{

desktop->_layer_changed_signal.emit (bottom);

}

static void

_reconstruction_start (SPDesktop * desktop)

{

// printf("Desktop, starting reconstruction\n");

desktop->_reconstruction_old_layer_id = g_strdup(SP_OBJECT_ID(desktop->currentLayer()));

desktop->_layer_hierarchy->setBottom(desktop->currentRoot());

/*

desktop->selection->clear();

// printf("Desktop, starting reconstruction end\n");

}

static void

_reconstruction_finish (SPDesktop * desktop)

{

// printf("Desktop, finishing reconstruction\n");

if (desktop->_reconstruction_old_layer_id == NULL)

return;

SPObject * newLayer = SP_OBJECT_DOCUMENT(desktop->namedview)->getObjectById(desktop->_reconstruction_old_layer_id);

if (newLayer != NULL)

desktop->setCurrentLayer(newLayer);

g_free(desktop->_reconstruction_old_layer_id);

desktop->_reconstruction_old_layer_id = NULL;

// printf("Desktop, finishing reconstruction end\n");

return;

}

static void

_namedview_modified (SPObject *obj, guint flags, SPDesktop *desktop)

{

SPNamedView *nv=SP_NAMEDVIEW(obj);

if (flags & SP_OBJECT_MODIFIED_FLAG) {

/* Show/hide page background */

if (nv->pagecolor & 0xff) {

sp_canvas_item_show (desktop->table);

((CtrlRect *) desktop->table)->setColor(0x00000000, true, nv->pagecolor);

sp_canvas_item_move_to_z (desktop->table, 0);

} else {

sp_canvas_item_hide (desktop->table);

}

/* Show/hide page border */

if (nv->showborder) {

// show

sp_canvas_item_show (desktop->page_border);

// set color and shadow

((CtrlRect *) desktop->page_border)->setColor(nv->bordercolor, false, 0x00000000);

if (nv->pageshadow) {

((CtrlRect *) desktop->page_border)->setShadow(nv->pageshadow, nv->bordercolor);

}

// place in the z-order stack

if (nv->borderlayer == SP_BORDER_LAYER_BOTTOM) {

sp_canvas_item_move_to_z (desktop->page_border, 2);

} else {

int order = sp_canvas_item_order (desktop->page_border);

int morder = sp_canvas_item_order (desktop->drawing);

if (morder > order) sp_canvas_item_raise (desktop->page_border,

morder - order);

}

} else {

sp_canvas_item_hide (desktop->page_border);

if (nv->pageshadow) {

((CtrlRect *) desktop->page)->setShadow(0, 0x00000000);

}

}

/* Show/hide page shadow */

if (nv->showpageshadow && nv->pageshadow) {

((CtrlRect *) desktop->page_border)->setShadow(nv->pageshadow, nv->bordercolor);

} else {

((CtrlRect *) desktop->page_border)->setShadow(0, 0x00000000);

}

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

if (SP_RGBA32_A_U(nv->pagecolor) < 128 ||

(SP_RGBA32_R_U(nv->pagecolor) +

SP_RGBA32_G_U(nv->pagecolor) +

SP_RGBA32_B_U(nv->pagecolor)) >= 384) {

// the background color is light or transparent, use black outline

SP_CANVAS_ARENA (desktop->drawing)->arena->outlinecolor = prefs->getInt("/options/wireframecolors/onlight", 0xff);

} else { // use white outline

SP_CANVAS_ARENA (desktop->drawing)->arena->outlinecolor = prefs->getInt("/options/wireframecolors/ondark", 0xffffffff);

}

}

}

Geom::Matrix SPDesktop::w2d() const

{

return _w2d;

}

Geom::Point SPDesktop::w2d(Geom::Point const &p) const

{

return p * _w2d;

}

Geom::Point SPDesktop::d2w(Geom::Point const &p) const

{

return p * _d2w;

}

Geom::Matrix SPDesktop::doc2dt() const

{

return _doc2dt;

}

Geom::Matrix SPDesktop::dt2doc() const

{

// doc2dt is its own inverse

return _doc2dt;

}

Geom::Point SPDesktop::doc2dt(Geom::Point const &p) const

{

return p * _doc2dt;

}

Geom::Point SPDesktop::dt2doc(Geom::Point const &p) const

{

return p * dt2doc();

}