#include "config.h"

#include <gdk/gdkkeysyms.h>

#include <cstring>

#include <string>

#include "macros.h"

#include "display/sp-canvas.h"

#include "sp-spiral.h"

#include "document.h"

#include "document-undo.h"

#include "sp-namedview.h"

#include "selection.h"

#include "snap.h"

#include "desktop.h"

#include "desktop-style.h"

#include "message-context.h"

#include "pixmaps/cursor-spiral.xpm"

#include "ui/tools/spiral-tool.h"

#include <glibmm/i18n.h>

#include "xml/repr.h"

#include "xml/node-event-vector.h"

#include "preferences.h"

#include "context-fns.h"

#include "ui/shape-editor.h"

#include "verbs.h"

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

using Inkscape::DocumentUndo;

namespace Inkscape {

namespace UI {

namespace Tools {

const std::string& SpiralTool::getPrefsPath() {

return SpiralTool::prefsPath;

}

const std::string SpiralTool::prefsPath = "/tools/shapes/spiral";

SpiralTool::SpiralTool()

: ToolBase(cursor_spiral_xpm, 4, 4)

, spiral(NULL)

, revo(3)

, exp(1)

, t0(0)

{

}

void SpiralTool::finish() {

SPDesktop *desktop = this->desktop;

sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME);

this->finishItem();

this->sel_changed_connection.disconnect();

ToolBase::finish();

}

SpiralTool::~SpiralTool() {

this->enableGrDrag(false);

this->sel_changed_connection.disconnect();

delete this->shape_editor;

this->shape_editor = NULL;

/* fixme: This is necessary because we do not grab */

if (this->spiral) {

this->finishItem();

}

}

void SpiralTool::selection_changed(Inkscape::Selection *selection) {

this->shape_editor->unset_item();

this->shape_editor->set_item(selection->singleItem());

}

void SpiralTool::setup() {

ToolBase::setup();

sp_event_context_read(this, "expansion");

sp_event_context_read(this, "revolution");

sp_event_context_read(this, "t0");

this->shape_editor = new ShapeEditor(this->desktop);

SPItem *item = this->desktop->getSelection()->singleItem();

if (item) {

this->shape_editor->set_item(item);

}

Inkscape::Selection *selection = this->desktop->getSelection();

this->sel_changed_connection.disconnect();

this->sel_changed_connection = selection->connectChanged(sigc::mem_fun(this, &SpiralTool::selection_changed));

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

if (prefs->getBool("/tools/shapes/selcue")) {

this->enableSelectionCue();

}

if (prefs->getBool("/tools/shapes/gradientdrag")) {

this->enableGrDrag();

}

}

void SpiralTool::set(const Inkscape::Preferences::Entry& val) {

Glib::ustring name = val.getEntryName();

if (name == "expansion") {

this->exp = CLAMP(val.getDouble(), 0.0, 1000.0);

} else if (name == "revolution") {

this->revo = CLAMP(val.getDouble(3.0), 0.05, 40.0);

} else if (name == "t0") {

this->t0 = CLAMP(val.getDouble(), 0.0, 0.999);

}

}

bool SpiralTool::root_handler(GdkEvent* event) {

static gboolean dragging;

SPDesktop *desktop = this->desktop;

Inkscape::Selection *selection = desktop->getSelection();

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

this->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);

gint ret = FALSE;

switch (event->type) {

case GDK_BUTTON_PRESS:

if (event->button.button == 1 && !this->space_panning) {

dragging = TRUE;

this->center = Inkscape::setup_for_drag_start(desktop, this, event);

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

m.setup(desktop);

m.freeSnapReturnByRef(this->center, Inkscape::SNAPSOURCE_NODE_HANDLE);

m.unSetup();

sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),

( GDK_KEY_PRESS_MASK |

GDK_BUTTON_RELEASE_MASK |

GDK_POINTER_MOTION_MASK |

GDK_POINTER_MOTION_HINT_MASK |

GDK_BUTTON_PRESS_MASK ),

NULL, event->button.time);

ret = TRUE;

}

break;

case GDK_MOTION_NOTIFY:

if (dragging && (event->motion.state & GDK_BUTTON1_MASK) && !this->space_panning) {

if ( this->within_tolerance

&& ( abs( (gint) event->motion.x - this->xp ) < this->tolerance )

&& ( abs( (gint) event->motion.y - this->yp ) < this->tolerance ) ) {

break; // do not drag if we're within tolerance from origin

}

// Once the user has moved farther than tolerance from the original location

// (indicating they intend to draw, not click), then always process the

// motion notify coordinates as given (no snapping back to origin)

this->within_tolerance = false;

Geom::Point const motion_w(event->motion.x, event->motion.y);

Geom::Point motion_dt(this->desktop->w2d(motion_w));

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

m.setup(desktop, true, this->spiral);

m.freeSnapReturnByRef(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);

m.unSetup();

this->drag(motion_dt, event->motion.state);

gobble_motion_events(GDK_BUTTON1_MASK);

ret = TRUE;

} else if (!this->sp_event_context_knot_mouseover()) {

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

m.setup(desktop);

Geom::Point const motion_w(event->motion.x, event->motion.y);

Geom::Point motion_dt(desktop->w2d(motion_w));

m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE));

m.unSetup();

}

break;

case GDK_BUTTON_RELEASE:

this->xp = this->yp = 0;

if (event->button.button == 1 && !this->space_panning) {

dragging = FALSE;

sp_event_context_discard_delayed_snap_event(this);

if (!this->within_tolerance) {

// we've been dragging, finish the spiral

this->finishItem();

} else if (this->item_to_select) {

// no dragging, select clicked item if any

if (event->button.state & GDK_SHIFT_MASK) {

selection->toggle(this->item_to_select);

} else {

selection->set(this->item_to_select);

}

} else {

// click in an empty space

selection->clear();

}

this->item_to_select = NULL;

ret = TRUE;

sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time);

}

break;

case GDK_KEY_PRESS:

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

case GDK_KEY_Alt_R:

case GDK_KEY_Control_L:

case GDK_KEY_Control_R:

case GDK_KEY_Shift_L:

case GDK_KEY_Shift_R:

case GDK_KEY_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)

case GDK_KEY_Meta_R:

sp_event_show_modifier_tip(this->defaultMessageContext(), event,

_("<b>Ctrl</b>: snap angle"),

NULL,

_("<b>Alt</b>: lock spiral radius"));

break;

case GDK_KEY_Up:

case GDK_KEY_Down:

case GDK_KEY_KP_Up:

case GDK_KEY_KP_Down:

// prevent the zoom field from activation

if (!MOD__CTRL_ONLY(event))

ret = TRUE;

break;

case GDK_KEY_x:

case GDK_KEY_X:

if (MOD__ALT_ONLY(event)) {

desktop->setToolboxFocusTo ("altx-spiral");

ret = TRUE;

}

break;

case GDK_KEY_Escape:

if (dragging) {

dragging = false;

sp_event_context_discard_delayed_snap_event(this);

// if drawing, cancel, otherwise pass it up for deselecting

this->cancel();

ret = TRUE;

}

break;

case GDK_KEY_space:

if (dragging) {

sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),

event->button.time);

dragging = false;

sp_event_context_discard_delayed_snap_event(this);

if (!this->within_tolerance) {

// we've been dragging, finish the spiral

this->finish();

}

// do not return true, so that space would work switching to selector

}

break;

case GDK_KEY_Delete:

case GDK_KEY_KP_Delete:

case GDK_KEY_BackSpace:

ret = this->deleteSelectedDrag(MOD__CTRL_ONLY(event));

break;

default:

break;

}

break;

case GDK_KEY_RELEASE:

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

case GDK_KEY_Alt_L:

case GDK_KEY_Alt_R:

case GDK_KEY_Control_L:

case GDK_KEY_Control_R:

case GDK_KEY_Shift_L:

case GDK_KEY_Shift_R:

case GDK_KEY_Meta_L: // Meta is when you press Shift+Alt

case GDK_KEY_Meta_R:

this->defaultMessageContext()->clear();

break;

default:

break;

}

break;

default:

break;

}

if (!ret) {

ret = ToolBase::root_handler(event);

}

return ret;

}

void SpiralTool::drag(Geom::Point const &p, guint state) {

SPDesktop *desktop = SP_EVENT_CONTEXT(this)->desktop;

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

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

if (!this->spiral) {

if (Inkscape::have_viable_layer(desktop, this->message_context) == false) {

return;

}

// Create object

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

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

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

// Set style

sp_desktop_apply_style_tool(desktop, repr, "/tools/shapes/spiral", false);

this->spiral = SP_SPIRAL(desktop->currentLayer()->appendChildRepr(repr));

Inkscape::GC::release(repr);

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

this->spiral->updateRepr();

desktop->canvas->forceFullRedrawAfterInterruptions(5);

}

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

m.setup(desktop, true, this->spiral);

Geom::Point pt2g = p;

m.freeSnapReturnByRef(pt2g, Inkscape::SNAPSOURCE_NODE_HANDLE);

m.unSetup();

Geom::Point const p0 = desktop->dt2doc(this->center);

Geom::Point const p1 = desktop->dt2doc(pt2g);

Geom::Point const delta = p1 - p0;

gdouble const rad = Geom::L2(delta);

gdouble arg = Geom::atan2(delta) - 2.0*M_PI*this->spiral->revo;

if (state & GDK_CONTROL_MASK) {

arg = sp_round(arg, M_PI/snaps);

}

/* Fixme: these parameters should be got from dialog box */

this->spiral->setPosition(p0[Geom::X], p0[Geom::Y],

/*expansion*/ this->exp,

/*revolution*/ this->revo,

rad, arg,

/*t0*/ this->t0);

/* status text */

Inkscape::Util::Quantity q = Inkscape::Util::Quantity(rad, "px");

GString *rads = g_string_new(q.string(desktop->namedview->display_units).c_str());

this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE,

_("<b>Spiral</b>: radius %s, angle %5g&#176;; with <b>Ctrl</b> to snap angle"),

rads->str, sp_round((arg + 2.0*M_PI*this->spiral->revo)*180/M_PI, 0.0001));

g_string_free(rads, FALSE);

}

void SpiralTool::finishItem() {

this->message_context->clear();

if (this->spiral != NULL) {

if (this->spiral->rad == 0) {

this->cancel(); // Don't allow the creating of zero sized spiral, for example when the start and and point snap to the snap grid point

return;

}

spiral->set_shape();

spiral->updateRepr(SP_OBJECT_WRITE_EXT);

spiral->doWriteTransform(spiral->getRepr(), spiral->transform, NULL, true);

this->desktop->canvas->endForcedFullRedraws();

this->desktop->getSelection()->set(this->spiral);

DocumentUndo::done(this->desktop->getDocument(), SP_VERB_CONTEXT_SPIRAL, _("Create spiral"));

this->spiral = NULL;

}

}

void SpiralTool::cancel() {

this->desktop->getSelection()->clear();

sp_canvas_item_ungrab(SP_CANVAS_ITEM(this->desktop->acetate), 0);

if (this->spiral != NULL) {

this->spiral->deleteObject();

this->spiral = NULL;

}

this->within_tolerance = false;

this->xp = 0;

this->yp = 0;

this->item_to_select = NULL;

this->desktop->canvas->endForcedFullRedraws();

DocumentUndo::cancel(this->desktop->getDocument());

}

}

}

}