#define DRAW_VERBOSE

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include "live_effects/lpe-patternalongpath.h"

#include "display/canvas-bpath.h"

#include "xml/repr.h"

#include "svg/svg.h"

#include <glibmm/i18n.h>

#include "display/curve.h"

#include "desktop.h"

#include "desktop-handles.h"

#include "desktop-style.h"

#include "document.h"

#include "draw-anchor.h"

#include "macros.h"

#include "message-stack.h"

#include "pen-context.h"

#include "lpe-tool-context.h"

#include "preferences.h"

#include "selection.h"

#include "selection-chemistry.h"

#include "snap.h"

#include "sp-path.h"

#include "sp-namedview.h"

#include "live_effects/lpe-powerstroke.h"

#include "style.h"

#include <gdk/gdkkeysyms.h>

using Inkscape::DocumentUndo;

static void sp_draw_context_class_init(SPDrawContextClass *klass);

static void sp_draw_context_init(SPDrawContext *dc);

static void sp_draw_context_dispose(GObject *object);

static void sp_draw_context_setup(SPEventContext *ec);

static void sp_draw_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);

static void sp_draw_context_finish(SPEventContext *ec);

static gint sp_draw_context_root_handler(SPEventContext *event_context, GdkEvent *event);

static void spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc);

static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc);

static void spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel);

static void spdc_flush_white(SPDrawContext *dc, SPCurve *gc);

static void spdc_reset_white(SPDrawContext *dc);

static void spdc_free_colors(SPDrawContext *dc);

static SPEventContextClass *draw_parent_class;

sp_draw_context_get_type(void)

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPDrawContextClass),

NULL, NULL,

(GClassInitFunc) sp_draw_context_class_init,

NULL, NULL,

sizeof(SPDrawContext),

4,

(GInstanceInitFunc) sp_draw_context_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDrawContext", &info, (GTypeFlags)0);

}

return type;

}

static void

sp_draw_context_class_init(SPDrawContextClass *klass)

{

GObjectClass *object_class;

SPEventContextClass *ec_class;

object_class = (GObjectClass *)klass;

ec_class = (SPEventContextClass *) klass;

draw_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);

object_class->dispose = sp_draw_context_dispose;

ec_class->setup = sp_draw_context_setup;

ec_class->set = sp_draw_context_set;

ec_class->finish = sp_draw_context_finish;

ec_class->root_handler = sp_draw_context_root_handler;

}

static void

sp_draw_context_init(SPDrawContext *dc)

{

dc->attach = FALSE;

dc->red_color = 0xff00007f;

dc->blue_color = 0x0000ff7f;

dc->green_color = 0x00ff007f;

dc->red_curve_is_valid = false;

dc->red_bpath = NULL;

dc->red_curve = NULL;

dc->blue_bpath = NULL;

dc->blue_curve = NULL;

dc->green_bpaths = NULL;

dc->green_curve = NULL;

dc->green_anchor = NULL;

dc->green_closed = false;

dc->white_item = NULL;

dc->white_curves = NULL;

dc->white_anchors = NULL;

dc->sa = NULL;

dc->ea = NULL;

dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;

new (&dc->sel_changed_connection) sigc::connection();

new (&dc->sel_modified_connection) sigc::connection();

}

static void

sp_draw_context_dispose(GObject *object)

{

SPDrawContext *dc = SP_DRAW_CONTEXT(object);

dc->sel_changed_connection.~connection();

dc->sel_modified_connection.~connection();

if (dc->grab) {

sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);

dc->grab = NULL;

}

if (dc->selection) {

dc->selection = NULL;

}

spdc_free_colors(dc);

G_OBJECT_CLASS(draw_parent_class)->dispose(object);

}

static void

sp_draw_context_setup(SPEventContext *ec)

{

SPDrawContext *dc = SP_DRAW_CONTEXT(ec);

SPDesktop *dt = ec->desktop;

if (((SPEventContextClass *) draw_parent_class)->setup) {

((SPEventContextClass *) draw_parent_class)->setup(ec);

}

dc->selection = sp_desktop_selection(dt);

/* Connect signals to track selection changes */

dc->sel_changed_connection = dc->selection->connectChanged(

sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)

);

dc->sel_modified_connection = dc->selection->connectModified(

sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)

);

/* Create red bpath */

dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);

sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);

/* Create red curve */

dc->red_curve = new SPCurve();

/* Create blue bpath */

dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);

sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);

/* Create blue curve */

dc->blue_curve = new SPCurve();

/* Create green curve */

dc->green_curve = new SPCurve();

/* No green anchor by default */

dc->green_anchor = NULL;

dc->green_closed = FALSE;

dc->attach = TRUE;

spdc_attach_selection(dc, dc->selection);

}

static void

sp_draw_context_finish(SPEventContext *ec)

{

SPDrawContext *dc = SP_DRAW_CONTEXT(ec);

dc->sel_changed_connection.disconnect();

dc->sel_modified_connection.disconnect();

if (dc->grab) {

sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);

}

if (dc->selection) {

dc->selection = NULL;

}

spdc_free_colors(dc);

}

static void

sp_draw_context_set(SPEventContext */*ec*/, Inkscape::Preferences::Entry */*val*/)

{

}

sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)

{

gint ret = FALSE;

switch (event->type) {

case GDK_KEY_PRESS:

switch (get_group0_keyval (&event->key)) {

case GDK_Up:

case GDK_Down:

case GDK_KP_Up:

case GDK_KP_Down:

// prevent the zoom field from activation

if (!MOD__CTRL_ONLY) {

ret = TRUE;

}

break;

default:

break;

}

break;

default:

break;

}

if (!ret) {

if (((SPEventContextClass *) draw_parent_class)->root_handler) {

ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);

}

}

return ret;

}

static Glib::ustring const

tool_name(SPDrawContext *dc)

{

return ( SP_IS_PEN_CONTEXT(dc)

? "/tools/freehand/pen"

: "/tools/freehand/pencil" );

}

static void

spdc_paste_curve_as_freehand_shape(const SPCurve *c, SPDrawContext *dc, SPItem *item)

{

using namespace Inkscape::LivePathEffect;

// TODO: Don't paste path if nothing is on the clipboard

Effect::createAndApply(PATTERN_ALONG_PATH, dc->desktop->doc(), item);

Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));

gchar *svgd = sp_svg_write_path(c->get_pathvector());

static_cast<LPEPatternAlongPath*>(lpe)->pattern.paste_param_path(svgd);

}

static void

spdc_apply_powerstroke_shape(const std::vector<Geom::Point> & points, SPDrawContext *dc, SPItem *item)

{

using namespace Inkscape::LivePathEffect;

Effect::createAndApply(POWERSTROKE, dc->desktop->doc(), item);

Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));

static_cast<LPEPowerStroke*>(lpe)->offset_points.param_set_and_write_new_value(points);

// write powerstroke parameters:

lpe->getRepr()->setAttribute("start_linecap_type", "zerowidth");

lpe->getRepr()->setAttribute("end_linecap_type", "zerowidth");

lpe->getRepr()->setAttribute("cusp_linecap_type", "round");

lpe->getRepr()->setAttribute("sort_points", "true");

lpe->getRepr()->setAttribute("interpolator_type", "CubicBezierJohan");

lpe->getRepr()->setAttribute("interpolator_beta", "0.2");

}

spdc_check_for_and_apply_waiting_LPE(SPDrawContext *dc, SPItem *item, SPCurve *curve)

{

using namespace Inkscape::LivePathEffect;

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

if (item && SP_IS_LPE_ITEM(item)) {

if (prefs->getInt(tool_name(dc) + "/freehand-mode", 0) == 1) {

Effect::createAndApply(SPIRO, dc->desktop->doc(), item);

}

int shape = prefs->getInt(tool_name(dc) + "/shape", 0);

bool shape_applied = false;

SPCSSAttr *css_item = sp_css_attr_from_object(item, SP_STYLE_FLAG_ALWAYS);

const char *cstroke = sp_repr_css_property(css_item, "stroke", "none");

#define SHAPE_LENGTH 10

#define SHAPE_HEIGHT 10

switch (shape) {

case 0:

// don't apply any shape

break;

case 1:

{

// "triangle in"

std::vector<Geom::Point> points(1);

points[0] = Geom::Point(0., SHAPE_HEIGHT/2);

spdc_apply_powerstroke_shape(points, dc, item);

shape_applied = true;

break;

}

case 2:

{

// "triangle out"

guint curve_length = curve->get_segment_count();

std::vector<Geom::Point> points(1);

points[0] = Geom::Point((double)curve_length, SHAPE_HEIGHT/2);

spdc_apply_powerstroke_shape(points, dc, item);

shape_applied = true;

break;

}

case 3:

{

// "ellipse"

SPCurve *c = new SPCurve();

const double C1 = 0.552;

c->moveto(0, SHAPE_HEIGHT/2);

c->curveto(0, (1 - C1) * SHAPE_HEIGHT/2, (1 - C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH/2, 0);

c->curveto((1 + C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH, (1 - C1) * SHAPE_HEIGHT/2, SHAPE_LENGTH, SHAPE_HEIGHT/2);

c->curveto(SHAPE_LENGTH, (1 + C1) * SHAPE_HEIGHT/2, (1 + C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, SHAPE_LENGTH/2, SHAPE_HEIGHT);

c->curveto((1 - C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, 0, (1 + C1) * SHAPE_HEIGHT/2, 0, SHAPE_HEIGHT/2);

c->closepath();

spdc_paste_curve_as_freehand_shape(c, dc, item);

c->unref();

shape_applied = true;

break;

}

case 4:

{

// take shape from clipboard; TODO: catch the case where clipboard is empty

Effect::createAndApply(PATTERN_ALONG_PATH, dc->desktop->doc(), item);

Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));

static_cast<LPEPatternAlongPath*>(lpe)->pattern.on_paste_button_click();

shape_applied = true;

break;

}

default:

break;

}

if (shape_applied) {

// apply original stroke color as fill and unset stroke; then return

SPCSSAttr *css = sp_repr_css_attr_new();

if (!strcmp(cstroke, "none")){

sp_repr_css_set_property (css, "fill", "black");

} else {

sp_repr_css_set_property (css, "fill", cstroke);

}

sp_repr_css_set_property (css, "stroke", "none");

sp_desktop_apply_css_recursive(item, css, true);

sp_repr_css_attr_unref(css);

return;

}

if (dc->waiting_LPE_type != INVALID_LPE) {

Effect::createAndApply(dc->waiting_LPE_type, dc->desktop->doc(), item);

dc->waiting_LPE_type = INVALID_LPE;

if (SP_IS_LPETOOL_CONTEXT(dc)) {

// since a geometric LPE was applied, we switch back to "inactive" mode

lpetool_context_switch_mode(SP_LPETOOL_CONTEXT(dc), INVALID_LPE);

}

}

if (SP_IS_PEN_CONTEXT(dc)) {

sp_pen_context_set_polyline_mode(SP_PEN_CONTEXT(dc));

}

}

}

static void

spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)

{

if (dc->attach) {

spdc_attach_selection(dc, sel);

}

}

static void

spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)

{

if (dc->attach) {

spdc_attach_selection(dc, sel);

}

}

static void

spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)

{

/* We reset white and forget white/start/end anchors */

spdc_reset_white(dc);

dc->sa = NULL;

dc->ea = NULL;

SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;

if ( item && SP_IS_PATH(item) ) {

/* Create new white data */

/* Item */

dc->white_item = item;

/* Curve list */

/* We keep it in desktop coordinates to eliminate calculation errors */

SPCurve *norm = SP_PATH(item)->get_curve_for_edit();

norm->transform((dc->white_item)->i2dt_affine());

g_return_if_fail( norm != NULL );

dc->white_curves = g_slist_reverse(norm->split());

norm->unref();

/* Anchor list */

for (GSList *l = dc->white_curves; l != NULL; l = l->next) {

SPCurve *c;

c = (SPCurve*)l->data;

g_return_if_fail( c->get_segment_count() > 0 );

if ( !c->is_closed() ) {

SPDrawAnchor *a;

a = sp_draw_anchor_new(dc, c, TRUE, *(c->first_point()));

if (a)

dc->white_anchors = g_slist_prepend(dc->white_anchors, a);

a = sp_draw_anchor_new(dc, c, FALSE, *(c->last_point()));

if (a)

dc->white_anchors = g_slist_prepend(dc->white_anchors, a);

}

}

/* fixme: recalculate active anchor? */

}

}

void spdc_endpoint_snap_rotation(SPEventContext const *const ec, Geom::Point &p, Geom::Point const &o,

guint state)

{

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

unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));

SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;

m.setup(SP_EVENT_CONTEXT_DESKTOP(ec));

bool snap_enabled = m.snapprefs.getSnapEnabledGlobally();

if (state & GDK_SHIFT_MASK) {

// SHIFT disables all snapping, except the angular snapping. After all, the user explicitly asked for angular

// snapping by pressing CTRL, otherwise we wouldn't have arrived here. But although we temporarily disable

// the snapping here, we must still call for a constrained snap in order to apply the constraints (i.e. round

// to the nearest angle increment)

m.snapprefs.setSnapEnabledGlobally(false);

}

Inkscape::SnappedPoint dummy = m.constrainedAngularSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE), boost::optional<Geom::Point>(), o, snaps);

p = dummy.getPoint();

if (state & GDK_SHIFT_MASK) {

m.snapprefs.setSnapEnabledGlobally(snap_enabled); // restore the original setting

}

m.unSetup();

}

void spdc_endpoint_snap_free(SPEventContext const * const ec, Geom::Point& p, boost::optional<Geom::Point> &start_of_line, guint const /*state*/)

{

SPDesktop *dt = SP_EVENT_CONTEXT_DESKTOP(ec);

SnapManager &m = dt->namedview->snap_manager;

Inkscape::Selection *selection = sp_desktop_selection (dt);

// selection->singleItem() is the item that is currently being drawn. This item will not be snapped to (to avoid self-snapping)

// TODO: Allow snapping to the stationary parts of the item, and only ignore the last segment

m.setup(dt, true, selection->singleItem());

Inkscape::SnapCandidatePoint scp(p, Inkscape::SNAPSOURCE_NODE_HANDLE);

if (start_of_line) {

scp.addOrigin(*start_of_line);

}

Inkscape::SnappedPoint sp = m.freeSnap(scp);

p = sp.getPoint();

m.unSetup();

}

static SPCurve *

reverse_then_unref(SPCurve *orig)

{

SPCurve *ret = orig->create_reverse();

orig->unref();

return ret;

}

spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)

{

/* Concat RBG */

SPCurve *c = dc->green_curve;

/* Green */

dc->green_curve = new SPCurve();

while (dc->green_bpaths) {

gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));

dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);

}

/* Blue */

c->append_continuous(dc->blue_curve, 0.0625);

dc->blue_curve->reset();

sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);

/* Red */

if (dc->red_curve_is_valid) {

c->append_continuous(dc->red_curve, 0.0625);

}

dc->red_curve->reset();

sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);

if (c->is_empty()) {

c->unref();

return;

}

/* Step A - test, whether we ended on green anchor */

if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {

// We hit green anchor, closing Green-Blue-Red

SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));

c->closepath_current();

/* Closed path, just flush */

spdc_flush_white(dc, c);

c->unref();

return;

}

/* Step B - both start and end anchored to same curve */

if ( dc->sa && dc->ea

&& ( dc->sa->curve == dc->ea->curve )

&& ( ( dc->sa != dc->ea )

|| dc->sa->curve->is_closed() ) )

{

// We hit bot start and end of single curve, closing paths

SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));

if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {

c = reverse_then_unref(c);

}

dc->sa->curve->append_continuous(c, 0.0625);

c->unref();

dc->sa->curve->closepath_current();

spdc_flush_white(dc, NULL);

return;

}

/* Step C - test start */

if (dc->sa) {

SPCurve *s = dc->sa->curve;

dc->white_curves = g_slist_remove(dc->white_curves, s);

if (dc->sa->start) {

s = reverse_then_unref(s);

}

s->append_continuous(c, 0.0625);

c->unref();

c = s;

} else /* Step D - test end */ if (dc->ea) {

SPCurve *e = dc->ea->curve;

dc->white_curves = g_slist_remove(dc->white_curves, e);

if (!dc->ea->start) {

e = reverse_then_unref(e);

}

c->append_continuous(e, 0.0625);

e->unref();

}

spdc_flush_white(dc, c);

c->unref();

}

static void

spdc_flush_white(SPDrawContext *dc, SPCurve *gc)

{

SPCurve *c;

if (dc->white_curves) {

g_assert(dc->white_item);

c = SPCurve::concat(dc->white_curves);

g_slist_free(dc->white_curves);

dc->white_curves = NULL;

if (gc) {

c->append(gc, FALSE);

}

} else if (gc) {

c = gc;

c->ref();

} else {

return;

}

/* Now we have to go back to item coordinates at last */

c->transform( dc->white_item

? (dc->white_item)->dt2i_affine()

: SP_EVENT_CONTEXT_DESKTOP(dc)->dt2doc() );

SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);

SPDocument *doc = sp_desktop_document(desktop);

Inkscape::XML::Document *xml_doc = doc->getReprDoc();

if ( c && !c->is_empty() ) {

/* We actually have something to write */

bool has_lpe = false;

Inkscape::XML::Node *repr;

if (dc->white_item) {

repr = dc->white_item->getRepr();

has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));

} else {

repr = xml_doc->createElement("svg:path");

/* Set style */

sp_desktop_apply_style_tool(desktop, repr, tool_name(dc).data(), false);

}

gchar *str = sp_svg_write_path( c->get_pathvector() );

g_assert( str != NULL );

if (has_lpe)

repr->setAttribute("inkscape:original-d", str);

else

repr->setAttribute("d", str);

g_free(str);

if (!dc->white_item) {

/* Attach repr */

SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));

// we finished the path; now apply any waiting LPEs or freehand shapes

spdc_check_for_and_apply_waiting_LPE(dc, item, c);

dc->selection->set(repr);

Inkscape::GC::release(repr);

item->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse();

item->updateRepr();

}

DocumentUndo::done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,

_("Draw path"));

// When quickly drawing several subpaths with Shift, the next subpath may be finished and

// flushed before the selection_modified signal is fired by the previous change, which

// results in the tool losing all of the selected path's curve except that last subpath. To

// fix this, we force the selection_modified callback now, to make sure the tool's curve is

// in sync immediately.

spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);

}

c->unref();

/* Flush pending updates */

doc->ensureUpToDate();

}

SPDrawAnchor *

spdc_test_inside(SPDrawContext *dc, Geom::Point p)

{

SPDrawAnchor *active = NULL;

/* Test green anchor */

if (dc->green_anchor) {

active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);

}

for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {

SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);

if ( !active && na ) {

active = na;

}

}

return active;

}

static void

spdc_reset_white(SPDrawContext *dc)

{

if (dc->white_item) {

/* We do not hold refcount */

dc->white_item = NULL;

}

while (dc->white_curves) {

reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();

dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);

}

while (dc->white_anchors) {

sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);

dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);

}

}

static void

spdc_free_colors(SPDrawContext *dc)

{

/* Red */

if (dc->red_bpath) {

gtk_object_destroy(GTK_OBJECT(dc->red_bpath));

dc->red_bpath = NULL;

}

if (dc->red_curve) {

dc->red_curve = dc->red_curve->unref();

}

/* Blue */

if (dc->blue_bpath) {

gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));

dc->blue_bpath = NULL;

}

if (dc->blue_curve) {

dc->blue_curve = dc->blue_curve->unref();

}

/* Green */

while (dc->green_bpaths) {

gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));

dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);

}

if (dc->green_curve) {

dc->green_curve = dc->green_curve->unref();

}

if (dc->green_anchor) {

dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);

}

/* White */

if (dc->white_item) {

/* We do not hold refcount */

dc->white_item = NULL;

}

while (dc->white_curves) {

reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();

dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);

}

while (dc->white_anchors) {

sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);

dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);

}

}

void spdc_create_single_dot(SPEventContext *ec, Geom::Point const &pt, char const *tool, guint event_state) {

g_return_if_fail(!strcmp(tool, "/tools/freehand/pen") || !strcmp(tool, "/tools/freehand/pencil"));

Glib::ustring tool_path = tool;

SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);

Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();

Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");

repr->setAttribute("sodipodi:type", "arc");

SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));

Inkscape::GC::release(repr);

/* apply the tool's current style */

sp_desktop_apply_style_tool(desktop, repr, tool, false);

/* find out stroke width (TODO: is there an easier way??) */

double stroke_width = 3.0;

gchar const *style_str = NULL;

style_str = repr->attribute("style");

if (style_str) {

SPStyle *style = sp_style_new(SP_ACTIVE_DOCUMENT);

sp_style_merge_from_style_string(style, style_str);

stroke_width = style->stroke_width.computed;

style->stroke_width.computed = 0;

sp_style_unref(style);

}

/* unset stroke and set fill color to former stroke color */

gchar * str;

str = g_strdup_printf("fill:#%06x;stroke:none;", sp_desktop_get_color_tool(desktop, tool, false) >> 8);

repr->setAttribute("style", str);

g_free(str);

/* put the circle where the mouse click occurred and set the diameter to the

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

Geom::Affine const i2d (item->i2dt_affine ());

Geom::Point pp = pt;

double rad = 0.5 * prefs->getDouble(tool_path + "/dot-size", 3.0);

if (event_state & GDK_MOD1_MASK) {

/* TODO: We vary the dot size between 0.5*rad and 1.5*rad, where rad is the dot size

double s = g_random_double_range(-0.5, 0.5);

rad *= (1 + s);

}

if (event_state & GDK_SHIFT_MASK) {

// double the point size

rad *= 2;

}

sp_repr_set_svg_double (repr, "sodipodi:cx", pp[Geom::X]);

sp_repr_set_svg_double (repr, "sodipodi:cy", pp[Geom::Y]);

sp_repr_set_svg_double (repr, "sodipodi:rx", rad * stroke_width);

sp_repr_set_svg_double (repr, "sodipodi:ry", rad * stroke_width);

item->updateRepr();

item->set_item_transform(i2d.inverse());

sp_desktop_selection(desktop)->set(item);

desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating single dot"));

DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_NONE, _("Create single dot"));

}