#define __SELTRANS_C__

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <libnr/nr-matrix-ops.h>

#include <libnr/nr-matrix-translate-ops.h>

#include <libnr/nr-rotate-ops.h>

#include <libnr/nr-scale-ops.h>

#include <libnr/nr-translate-matrix-ops.h>

#include <libnr/nr-translate-ops.h>

#include <gdk/gdkkeysyms.h>

#include "document.h"

#include "sp-namedview.h"

#include "desktop.h"

#include "desktop-handles.h"

#include "desktop-style.h"

#include "knot.h"

#include "snap.h"

#include "selection.h"

#include "select-context.h"

#include "sp-item.h"

#include "sp-item-transform.h"

#include "seltrans-handles.h"

#include "seltrans.h"

#include "selection-chemistry.h"

#include "sp-metrics.h"

#include <glibmm/i18n.h>

#include "display/sp-ctrlline.h"

#include "prefs-utils.h"

#include "xml/repr.h"

#include "isnan.h" //temp fix. make sure included last

static void sp_remove_handles(SPKnot *knot[], gint num);

static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data);

static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data);

static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data);

static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint32 state, gpointer data);

static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *p, guint state, gboolean *data);

extern GdkPixbuf *handles[];

static gboolean sp_seltrans_handle_event(SPKnot *knot, GdkEvent *event, gpointer)

{

switch (event->type) {

case GDK_MOTION_NOTIFY:

break;

case GDK_KEY_PRESS:

if (get_group0_keyval (&event->key) == GDK_space) {

/* stamping mode: both mode(show content and outline) operation with knot */

if (!SP_KNOT_IS_GRABBED(knot)) {

return FALSE;

}

SPDesktop *desktop = knot->desktop;

Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;

seltrans->stamp();

return TRUE;

}

break;

default:

break;

}

return FALSE;

}

Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :

_desktop(desktop),

_selcue(desktop),

_state(STATE_SCALE),

_show(SHOW_CONTENT),

_grabbed(false),

_show_handles(true),

_box(NR::Point(0,0), NR::Point(0,0)),

_chandle(NULL),

_stamp_cache(NULL),

_message_context(desktop->messageStack())

{

g_return_if_fail(desktop != NULL);

for (int i = 0; i < 8; i++) {

_shandle[i] = NULL;

_rhandle[i] = NULL;

}

_updateVolatileState();

_center_is_set = false; // reread _center from items, or set to bbox midpoint

_updateHandles();

_selection = sp_desktop_selection(desktop);

_norm = sp_canvas_item_new(sp_desktop_controls(desktop),

SP_TYPE_CTRL,

"anchor", GTK_ANCHOR_CENTER,

"mode", SP_CTRL_MODE_COLOR,

"shape", SP_CTRL_SHAPE_BITMAP,

"size", 13.0,

"filled", TRUE,

"fill_color", 0x00000000,

"stroked", TRUE,

"stroke_color", 0x000000a0,

"pixbuf", handles[12],

NULL);

_grip = sp_canvas_item_new(sp_desktop_controls(desktop),

SP_TYPE_CTRL,

"anchor", GTK_ANCHOR_CENTER,

"mode", SP_CTRL_MODE_XOR,

"shape", SP_CTRL_SHAPE_CROSS,

"size", 7.0,

"filled", TRUE,

"fill_color", 0xffffff7f,

"stroked", TRUE,

"stroke_color", 0xffffffff,

"pixbuf", handles[12],

NULL);

sp_canvas_item_hide(_grip);

sp_canvas_item_hide(_norm);

for (int i = 0; i < 4; i++) {

_l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);

sp_canvas_item_hide(_l[i]);

}

_sel_changed_connection = _selection->connectChanged(

sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)

);

_sel_modified_connection = _selection->connectModified(

sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)

);

}

Inkscape::SelTrans::~SelTrans()

{

_sel_changed_connection.disconnect();

_sel_modified_connection.disconnect();

for (unsigned int i = 0; i < 8; i++) {

if (_shandle[i]) {

g_object_unref(G_OBJECT(_shandle[i]));

_shandle[i] = NULL;

}

if (_rhandle[i]) {

g_object_unref(G_OBJECT(_rhandle[i]));

_rhandle[i] = NULL;

}

}

if (_chandle) {

g_object_unref(G_OBJECT(_chandle));

_chandle = NULL;

}

if (_norm) {

gtk_object_destroy(GTK_OBJECT(_norm));

_norm = NULL;

}

if (_grip) {

gtk_object_destroy(GTK_OBJECT(_grip));

_grip = NULL;

}

for (int i = 0; i < 4; i++) {

if (_l[i]) {

gtk_object_destroy(GTK_OBJECT(_l[i]));

_l[i] = NULL;

}

}

for (unsigned i = 0; i < _items.size(); i++) {

sp_object_unref(SP_OBJECT(_items[i].first), NULL);

}

_items.clear();

_items_centers.clear();

}

void Inkscape::SelTrans::resetState()

{

_state = STATE_SCALE;

}

void Inkscape::SelTrans::increaseState()

{

if (_state == STATE_SCALE) {

_state = STATE_ROTATE;

} else {

_state = STATE_SCALE;

}

_center_is_set = true; // no need to reread center

_updateHandles();

}

void Inkscape::SelTrans::setCenter(NR::Point const &p)

{

_center = p;

_center_is_set = true;

// Write the new center position into all selected items

for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {

SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);

it->setCenter(p);

SP_OBJECT(it)->updateRepr();

}

sp_document_maybe_done (sp_desktop_document(_desktop), "center::move");

_updateHandles();

}

void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)

{

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

g_return_if_fail(!_grabbed);

_grabbed = true;

_show_handles = show_handles;

_updateVolatileState();

_changed = false;

if (_empty) {

return;

}

for (GSList const *l = selection->itemList(); l; l = l->next) {

SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);

_items.push_back(std::pair<SPItem *, NR::Matrix>(it, sp_item_i2d_affine(it)));

_items_centers.push_back(std::pair<SPItem *, NR::Point>(it, it->getCenter())); // for content-dragging, we need to remember original centers

}

_current.set_identity();

_point = p;

_snap_points = selection->getSnapPoints();

_bbox_points = selection->getBBoxPoints();

gchar const *scale_origin = prefs_get_string_attribute("tools.select", "scale_origin");

bool const origin_on_bbox = (scale_origin == NULL || !strcmp(scale_origin, "bbox"));

NR::Rect op_box = _box;

if (origin_on_bbox == false && _snap_points.empty() == false) {

std::vector<NR::Point>::iterator i = _snap_points.begin();

op_box = NR::Rect(*i, *i);

i++;

while (i != _snap_points.end()) {

op_box.expandTo(*i);

i++;

}

}

_opposite = ( op_box.min() + ( op_box.dimensions() * NR::scale(1-x, 1-y) ) );

if ((x != -1) && (y != -1)) {

sp_canvas_item_show(_norm);

sp_canvas_item_show(_grip);

}

if (_show == SHOW_OUTLINE) {

for (int i = 0; i < 4; i++)

sp_canvas_item_show(_l[i]);

}

_updateHandles();

g_return_if_fail(_stamp_cache == NULL);

}

void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)

{

g_return_if_fail(_grabbed);

g_return_if_fail(!_empty);

NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );

if (_show == SHOW_CONTENT) {

// update the content

for (unsigned i = 0; i < _items.size(); i++) {

SPItem &item = *_items[i].first;

NR::Matrix const &prev_transform = _items[i].second;

sp_item_set_i2d_affine(&item, prev_transform * affine);

}

} else {

NR::Point p[4];

/* update the outline */

for (unsigned i = 0 ; i < 4 ; i++) {

p[i] = _box.corner(i) * affine;

}

for (unsigned i = 0 ; i < 4 ; i++) {

sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);

}

}

_current = affine;

_changed = true;

_updateHandles();

}

void Inkscape::SelTrans::ungrab()

{

g_return_if_fail(_grabbed);

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

bool updh = true;

if (!_empty && _changed) {

sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);

_center *= _current;

_center_is_set = true;

if (_show != SHOW_OUTLINE && !_current.is_translation()) {

for (unsigned i = 0; i < _items_centers.size(); i++) {

SPItem *currentItem = _items_centers[i].first;

if (currentItem->isCenterSet()) { // only if it's already set

currentItem->setCenter (_items_centers[i].second * _current);

SP_OBJECT(currentItem)->updateRepr();

}

}

}

sp_document_done(sp_desktop_document(_desktop));

updh = false;

}

for (unsigned i = 0; i < _items.size(); i++) {

sp_object_unref(SP_OBJECT(_items[i].first), NULL);

}

_items.clear();

_items_centers.clear();

_grabbed = false;

_show_handles = true;

sp_canvas_item_hide(_norm);

sp_canvas_item_hide(_grip);

if (_show == SHOW_OUTLINE) {

for (int i = 0; i < 4; i++)

sp_canvas_item_hide(_l[i]);

}

_updateVolatileState();

if (updh) {

_updateHandles();

}

if (_stamp_cache) {

g_slist_free(_stamp_cache);

_stamp_cache = NULL;

}

_message_context.clear();

}

void Inkscape::SelTrans::stamp()

{

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

/* stamping mode */

if (!_empty) {

GSList *l;

if (_stamp_cache) {

l = _stamp_cache;

} else {

/* Build cache */

l = g_slist_copy((GSList *) selection->itemList());

l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);

_stamp_cache = l;

}

while (l) {

SPItem *original_item = SP_ITEM(l->data);

Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);

// remember the position of the item

gint pos = original_repr->position();

// remember parent

Inkscape::XML::Node *parent = sp_repr_parent(original_repr);

Inkscape::XML::Node *copy_repr = original_repr->duplicate();

// add the new repr to the parent

parent->appendChild(copy_repr);

// move to the saved position

copy_repr->setPosition(pos > 0 ? pos : 0);

SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);

NR::Matrix const *new_affine;

if (_show == SHOW_OUTLINE) {

NR::Matrix const i2d(sp_item_i2d_affine(original_item));

NR::Matrix const i2dnew( i2d * _current );

sp_item_set_i2d_affine(copy_item, i2dnew);

new_affine = &copy_item->transform;

} else {

new_affine = &original_item->transform;

}

sp_item_write_transform(copy_item, copy_repr, *new_affine);

if (copy_item->isCenterSet()) {

copy_item->setCenter(_center * _current);

}

Inkscape::GC::release(copy_repr);

l = l->next;

}

sp_document_done(sp_desktop_document(_desktop));

}

}

void Inkscape::SelTrans::_updateHandles()

{

if ( !_show_handles || _empty )

{

sp_remove_handles(_shandle, 8);

sp_remove_handles(_rhandle, 8);

sp_remove_handles(&_chandle, 1);

return;

}

// center handle

if ( _chandle == NULL ) {

_chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));

_chandle->setShape (SP_CTRL_SHAPE_BITMAP);

_chandle->setSize (13);

_chandle->setAnchor (handle_center.anchor);

_chandle->setMode (SP_CTRL_MODE_XOR);

_chandle->setFill(0x00000000, 0x00000000, 0x00000000);

_chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);

_chandle->setPixbuf(handles[handle_center.control]);

sp_knot_update_ctrl(_chandle);

g_signal_connect(G_OBJECT(_chandle), "request",

G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);

g_signal_connect(G_OBJECT(_chandle), "moved",

G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);

g_signal_connect(G_OBJECT(_chandle), "grabbed",

G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);

g_signal_connect(G_OBJECT(_chandle), "ungrabbed",

G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);

g_signal_connect(G_OBJECT(_chandle), "clicked",

G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);

}

sp_remove_handles(&_chandle, 1);

if ( _state == STATE_SCALE ) {

sp_remove_handles(_rhandle, 8);

_showHandles(_shandle, handles_scale, 8,

_("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),

_("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));

} else {

sp_remove_handles(_shandle, 8);

_showHandles(_rhandle, handles_rotate, 8,

_("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),

_("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));

}

if (!_center_is_set) {

_center = _desktop->selection->center();

_center_is_set = true;

}

if ( _state == STATE_SCALE ) {

sp_knot_hide(_chandle);

} else {

sp_knot_show(_chandle);

sp_knot_moveto(_chandle, &_center);

}

}

void Inkscape::SelTrans::_updateVolatileState()

{

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

_empty = selection->isEmpty();

if (_empty) {

return;

}

_box = selection->bounds();

if (_box.isEmpty()) {

_empty = true;

return;

}

_strokewidth = stroke_average_width (selection->itemList());

_current.set_identity();

}

static void sp_remove_handles(SPKnot *knot[], gint num)

{

for (int i = 0; i < num; i++) {

if (knot[i] != NULL) {

sp_knot_hide(knot[i]);

}

}

}

void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,

gchar const *even_tip, gchar const *odd_tip)

{

g_return_if_fail( !_empty );

for (int i = 0; i < num; i++) {

if (knot[i] == NULL) {

knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);

knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);

knot[i]->setSize (13);

knot[i]->setAnchor (handle[i].anchor);

knot[i]->setMode (SP_CTRL_MODE_XOR);

knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green

knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion

knot[i]->setPixbuf(handles[handle[i].control]);

sp_knot_update_ctrl(knot[i]);

g_signal_connect(G_OBJECT(knot[i]), "request",

G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);

g_signal_connect(G_OBJECT(knot[i]), "moved",

G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);

g_signal_connect(G_OBJECT(knot[i]), "grabbed",

G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);

g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",

G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);

g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);

}

sp_knot_show(knot[i]);

NR::Point const handle_pt(handle[i].x, handle[i].y);

NR::Point p( _box.min()

+ ( _box.dimensions()

* NR::scale(handle_pt) ) );

sp_knot_moveto(knot[i], &p);

}

}

static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)

{

SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(

knot, state, *(SPSelTransHandle const *) data

);

}

static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)

{

SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();

}

static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)

{

SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(

knot, position, state, *(SPSelTransHandle const *) data

);

}

static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)

{

return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(

knot, position, state, *(SPSelTransHandle const *) data

);

}

static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)

{

SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(

knot, state, *(SPSelTransHandle const *) data

);

}

void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)

{

switch (handle.anchor) {

case GTK_ANCHOR_CENTER:

if (state & GDK_SHIFT_MASK) {

// Unset the center position for all selected items

for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {

SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);

it->unsetCenter();

SP_OBJECT(it)->updateRepr();

}

sp_document_maybe_done (sp_desktop_document(_desktop), "center::unset");

}

break;

default:

break;

}

}

void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)

{

switch (handle.anchor) {

case GTK_ANCHOR_CENTER:

g_object_set(G_OBJECT(_grip),

"shape", SP_CTRL_SHAPE_BITMAP,

"size", 13.0,

NULL);

sp_canvas_item_show(_grip);

break;

default:

g_object_set(G_OBJECT(_grip),

"shape", SP_CTRL_SHAPE_CROSS,

"size", 7.0,

NULL);

sp_canvas_item_show(_norm);

sp_canvas_item_show(_grip);

break;

}

grab(sp_knot_position(knot), handle.x, handle.y, FALSE);

}

void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)

{

if (!SP_KNOT_IS_GRABBED(knot)) {

return;

}

// in case items have been unhooked from the document, don't

// try to continue processing events for them.

for (unsigned int i = 0; i < _items.size(); i++) {

if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {

return;

}

}

handle.action(this, handle, *position, state);

}

gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)

{

if (!SP_KNOT_IS_GRABBED(knot)) {

return TRUE;

}

knot->desktop->set_coordinate_status(*position);

knot->desktop->setPosition(*position);

if (state & GDK_MOD1_MASK) {

*position = _point + ( *position - _point ) / 10;

}

if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {

_origin = _opposite;

} else {

_origin = _center;

}

if (handle.request(this, handle, *position, state)) {

sp_knot_set_position(knot, position, state);

SP_CTRL(_grip)->moveto(*position);

SP_CTRL(_norm)->moveto(_origin);

}

return TRUE;

}

void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)

{

if (!_grabbed) {

_updateVolatileState();

_center_is_set = false; // center(s) may have changed

_updateHandles();

}

}

void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)

{

if (!_grabbed) {

_updateVolatileState();

// reset internal flag

_changed = false;

_center_is_set = false; // center(s) may have changed

_updateHandles();

}

}

static double sign(double const x)

{

return ( x < 0

? -1

: 1 );

}

gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,

SPSelTransHandle const &, NR::Point &pt, guint state)

{

return seltrans->scaleRequest(pt, state);

}

gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,

SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

return seltrans->stretchRequest(handle, pt, state);

}

gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,

SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

return seltrans->skewRequest(handle, pt, state);

}

gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,

SPSelTransHandle const &, NR::Point &pt, guint state)

{

return seltrans->rotateRequest(pt, state);

}

gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,

SPSelTransHandle const &, NR::Point &pt, guint state)

{

return seltrans->centerRequest(pt, state);

}

gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)

{

using NR::X;

using NR::Y;

NR::Point d = _point - _origin;

NR::scale s(0, 0);

/* Work out the new scale factors `s' */

for ( unsigned int i = 0 ; i < 2 ; i++ ) {

if ( fabs(d[i]) > 0.001 ) {

s[i] = ( pt[i] - _origin[i] ) / d[i];

if ( fabs(s[i]) < 1e-9 ) {

s[i] = 1e-9;

}

}

}

SnapManager const &m = _desktop->namedview->snap_manager;

/* Get a STL list of the selected items.

std::list<SPItem const*> it;

for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {

it.push_back(reinterpret_cast<SPItem*>(i->data));

}

if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {

/* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].

NR::Point const cv = NR::Point(

pt[NR::X] > _origin[NR::X] ? 1 : -1,

pt[NR::Y] > _origin[NR::Y] ? 1 : -1

);

std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,

_bbox_points,

it,

Snapper::ConstraintLine(_origin, cv),

s,

_origin);

std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,

_snap_points,

it,

Snapper::ConstraintLine(_origin, cv),

s,

_origin);

/* Choose the smaller difference in scale. Since s[X] == s[Y] we can

double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;

double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;

s = (bd < sd) ? bb.first : sn.first;

} else {

/* Scale aspect ratio is unlocked */

std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,

_bbox_points,

it,

s,

_origin);

std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,

_snap_points,

it,

s,

_origin);

/* Pick the snap that puts us closest to the original scale */

NR::Coord bd = bb.second ?

fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -

NR::L2(NR::Point(s[NR::X], s[NR::Y])))

: NR_HUGE;

NR::Coord sd = sn.second ?

fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -

NR::L2(NR::Point(s[NR::X], s[NR::Y])))

: NR_HUGE;

s = (bd < sd) ? bb.first : sn.first;

}

/* Update the knot position */

pt = ( _point - _origin ) * s + _origin;

/* Status text */

_message_context.setF(Inkscape::NORMAL_MESSAGE,

_("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),

100 * s[NR::X], 100 * s[NR::Y]);

return TRUE;

}

gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

using NR::X;

using NR::Y;

NR::Dim2 axis, perp;

switch (handle.cursor) {

case GDK_TOP_SIDE:

case GDK_BOTTOM_SIDE:

axis = NR::Y;

perp = NR::X;

break;

case GDK_LEFT_SIDE:

case GDK_RIGHT_SIDE:

axis = NR::X;

perp = NR::Y;

break;

default:

g_assert_not_reached();

return TRUE;

};

if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {

return FALSE;

}

NR::scale s(1, 1);

s[axis] = ( ( pt[axis] - _origin[axis] )

/ ( _point[axis] - _origin[axis] ) );

if ( fabs(s[axis]) < 1e-15 ) {

s[axis] = 1e-15;

}

/* Get a STL list of the selected items.

std::list<SPItem const*> it;

for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {

it.push_back(reinterpret_cast<SPItem*>(i->data));

}

SnapManager const &m = _desktop->namedview->snap_manager;

if ( state & GDK_CONTROL_MASK ) {

s[perp] = fabs(s[axis]);

std::pair<double, bool> sn = namedview_vector_snap_list(_desktop->namedview,

Snapper::BBOX_POINT,

_bbox_points, _origin, s, it);

std::pair<double, bool> bb = namedview_vector_snap_list(_desktop->namedview,

Snapper::SNAP_POINT,

_snap_points, _origin, s, it);

double bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;

double sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;

double ratio = (bd < sd) ? bb.first : sn.first;

s[axis] = fabs(ratio) * sign(s[axis]);

s[perp] = fabs(s[axis]);

} else {

std::pair<NR::scale, bool> const bb = m.constrainedSnapScale(

Snapper::BBOX_POINT,

_bbox_points,

it,

Inkscape::Snapper::ConstraintLine(component_vectors[axis]),

s,

_origin);

std::pair<NR::scale, bool> const sn = m.constrainedSnapScale(

Snapper::SNAP_POINT,

_snap_points,

it,

Inkscape::Snapper::ConstraintLine(component_vectors[axis]),

s,

_origin);

/* Choose the smaller difference in scale */

NR::Coord const bd = bb.second ? fabs(bb.first[axis] - s[axis]) : NR_HUGE;

NR::Coord const sd = sn.second ? fabs(sn.first[axis] - s[axis]) : NR_HUGE;

s = (bd < sd) ? bb.first : sn.first;

}

pt = ( _point - _origin ) * NR::scale(s) + _origin;

if (isNaN(pt[X] + pt[Y])) {

g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",

_point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);

}

// status text

_message_context.setF(Inkscape::NORMAL_MESSAGE,

_("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),

100 * s[NR::X], 100 * s[NR::Y]);

return TRUE;

}

gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

using NR::X;

using NR::Y;

if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {

return FALSE;

}

NR::Dim2 dim_a;

NR::Dim2 dim_b;

if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {

dim_a = X;

dim_b = Y;

} else {

dim_a = Y;

dim_b = X;

}

double skew[2];

double s[2] = { 1.0, 1.0 };

if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {

return FALSE;

}

skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );

s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );

if ( fabs(s[dim_a]) < 1 ) {

s[dim_a] = sign(s[dim_a]);

} else {

s[dim_a] = floor( s[dim_a] + 0.5 );

}

double radians = atan(skew[dim_a] / s[dim_a]);

if (state & GDK_CONTROL_MASK) {

int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);

if (snaps) {

double sections = floor( radians * snaps / M_PI + .5 );

if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);

radians = ( M_PI / snaps ) * sections;

}

skew[dim_a] = tan(radians) * s[dim_a];

} else {

skew[dim_a] = namedview_dim_snap_list_skew(_desktop->namedview,

Snapper::SNAP_POINT, _snap_points,

_origin, skew[dim_a], dim_b);

}

pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];

pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];

/* status text */

double degrees = 180 / M_PI * radians;

if (degrees > 180) degrees -= 360;

if (degrees < -180) degrees += 360;

_message_context.setF(Inkscape::NORMAL_MESSAGE,

// TRANSLATORS: don't modify the first ";"

// (it will NOT be displayed as ";" - only the second one will be)

_("<b>Skew</b>: %0.2f&#176;; with <b>Ctrl</b> to snap angle"),

degrees);

return TRUE;

}

gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)

{

int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);

// rotate affine in rotate

NR::Point const d1 = _point - _origin;

NR::Point const d2 = pt - _origin;

NR::Coord const h1 = NR::L2(d1);

if (h1 < 1e-15) return FALSE;

NR::Point q1 = d1 / h1;

NR::Coord const h2 = NR::L2(d2);

if (fabs(h2) < 1e-15) return FALSE;

NR::Point q2 = d2 / h2;

double radians;

if (state & GDK_CONTROL_MASK) {

/* Have to restrict movement. */

double cos_t = NR::dot(q1, q2);

double sin_t = NR::dot(NR::rot90(q1), q2);

radians = atan2(sin_t, cos_t);

if (snaps) {

radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );

}

q1 = NR::Point(1, 0);

q2 = NR::Point(cos(radians), sin(radians));

} else {

radians = atan2(NR::dot(NR::rot90(d1), d2),

NR::dot(d1, d2));

}

NR::rotate const r1(q1);

NR::rotate const r2(q2);

pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);

/* status text */

double degrees = 180 / M_PI * radians;

if (degrees > 180) degrees -= 360;

if (degrees < -180) degrees += 360;

_message_context.setF(Inkscape::NORMAL_MESSAGE,

// TRANSLATORS: don't modify the first ";"

// (it will NOT be displayed as ";" - only the second one will be)

_("<b>Rotate</b>: %0.2f&#176;; with <b>Ctrl</b> to snap angle"), degrees);

return TRUE;

}

gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)

{

using NR::X;

using NR::Y;

SnapManager const &m = _desktop->namedview->snap_manager;

pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();

if (state & GDK_CONTROL_MASK) {

if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {

pt[Y] = _point[Y];

} else {

pt[X] = _point[X];

}

}

if (!(state & GDK_SHIFT_MASK)) {

// screen pixels to snap center to bbox

#define SNAP_DIST 5

// FIXME: take from prefs

double snap_dist = SNAP_DIST / _desktop->current_zoom();

for (int i = 0; i < 2; i++) {

if (fabs(pt[i] - _box.min()[i]) < snap_dist) {

pt[i] = _box.min()[i];

}

if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {

pt[i] = _box.midpoint()[i];

}

if (fabs(pt[i] - _box.max()[i]) < snap_dist) {

pt[i] = _box.max()[i];

}

}

}

// status text

GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());

GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());

_message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);

g_string_free(xs, FALSE);

g_string_free(ys, FALSE);

return TRUE;

}

void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

seltrans->stretch(handle, pt, state);

}

void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)

{

seltrans->scale(pt, state);

}

void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

seltrans->skew(handle, pt, state);

}

void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)

{

seltrans->rotate(pt, state);

}

void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

using NR::X;

using NR::Y;

NR::Dim2 dim;

switch (handle.cursor) {

case GDK_LEFT_SIDE:

case GDK_RIGHT_SIDE:

dim = X;

break;

case GDK_TOP_SIDE:

case GDK_BOTTOM_SIDE:

dim = Y;

break;

default:

g_assert_not_reached();

abort();

break;

}

NR::Point const scale_origin(_origin);

double const offset = _point[dim] - scale_origin[dim];

if (!( fabs(offset) >= 1e-15 )) {

return;

}

NR::scale s(1, 1);

s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;

if (isNaN(s[dim])) {

g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",

s[dim], pt[dim], scale_origin[dim], _point[dim]);

}

if (!( fabs(s[dim]) >= 1e-15 )) {

s[dim] = 1e-15;

}

if (state & GDK_CONTROL_MASK) {

/* Preserve aspect ratio, but never flip in the dimension not being edited. */

s[!dim] = fabs(s[dim]);

}

NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));

NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));

int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);

NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,

new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);

transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0

}

void Inkscape::SelTrans::scale(NR::Point &pt, guint state)

{

NR::Point const offset = _point - _origin;

NR::scale s (1, 1);

for (int i = NR::X; i <= NR::Y; i++) {

if (fabs(offset[i]) > 1e-9)

s[i] = (pt[i] - _origin[i]) / offset[i];

if (fabs(s[i]) < 1e-9)

s[i] = 1e-9;

}

NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));

NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));

int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);

NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,

new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);

transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0

}

void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)

{

NR::Point const offset = _point - _origin;

unsigned dim;

switch (handle.cursor) {

case GDK_SB_H_DOUBLE_ARROW:

dim = NR::Y;

break;

case GDK_SB_V_DOUBLE_ARROW:

dim = NR::X;

break;

default:

g_assert_not_reached();

abort();

break;

}

if (fabs(offset[dim]) < 1e-15) {

return;

}

NR::Matrix skew = NR::identity();

skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];

skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];

skew[2*(1-dim) + (dim)] = 0;

skew[2*(1-dim) + (1-dim)] = 1;

for (int i = 0; i < 2; i++) {

if (fabs(skew[3*i]) < 1e-15) {

skew[3*i] = 1e-15;

}

}

transform(skew, _origin);

}

void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)

{

NR::Point const offset = _point - _origin;

NR::Coord const h1 = NR::L2(offset);

if (h1 < 1e-15) {

return;

}

NR::Point const q1 = offset / h1;

NR::Coord const h2 = NR::L2( pt - _origin );

if (h2 < 1e-15) {

return;

}

NR::Point const q2 = (pt - _origin) / h2;

NR::rotate const r1(q1);

NR::rotate const r2(q2);

NR::Matrix rotate( r2 / r1 );

transform(rotate, _origin);

}

void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)

{

seltrans->setCenter(pt);

}

void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)

{

SnapManager const &m = _desktop->namedview->snap_manager;

/* The amount that we've moved by during this drag */

NR::Point dxy = xy - _point;

/* Get a STL list of the selected items.

std::list<SPItem const*> it;

for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {

it.push_back(reinterpret_cast<SPItem*>(i->data));

}

bool const alt = (state & GDK_MOD1_MASK);

bool const control = (state & GDK_CONTROL_MASK);

bool const shift = (state & GDK_SHIFT_MASK);

if (alt) {

/* Alt pressed means keep offset: snap the moved distance to the grid.

dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();

} else if (!shift) {

/* We're snapping to things, possibly with a constraint to horizontal or

/* This will be our list of possible translations */

std::list<std::pair<NR::Point, bool> > s;

if (control) {

/* Snap to things, and also constrain to horizontal or vertical movement */

for (unsigned int dim = 0; dim < 2; dim++) {

s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,

_bbox_points,

it,

Inkscape::Snapper::ConstraintLine(component_vectors[dim]),

dxy));

s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,

_snap_points,

it,

Inkscape::Snapper::ConstraintLine(component_vectors[dim]),

dxy));

}

} else {

/* Snap to things with no constraint */

s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,

_bbox_points, it, dxy));

s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,

_snap_points, it, dxy));

}

/* Pick one */

NR::Coord best = NR_HUGE;

for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {

if (i->second) {

NR::Coord const m = NR::L2(i->first);

if (m < best) {

best = m;

dxy = i->first;

}

}

}

}

if (control) {

/* Ensure that the horizontal and vertical constraint has been applied */

if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {

dxy[NR::Y] = 0;

} else {

dxy[NR::X] = 0;

}

}

NR::Matrix const move((NR::translate(dxy)));

NR::Point const norm(0, 0);

transform(move, norm);

// status text

GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());

GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());

_message_context.setF(Inkscape::NORMAL_MESSAGE, _("<b>Move</b> by %s, %s; with <b>Ctrl</b> to restrict to horizontal/vertical; with <b>Shift</b> to disable snapping"), xs->str, ys->str);

g_string_free(xs, TRUE);

g_string_free(ys, TRUE);

}