Code

Split SPCanvasItem and SPCanvasGroup to individual .h files. Removed forward header.
[inkscape.git] / src / eraser-context.cpp
index 295e75e8704b739e1458ef89fa092b5b02eb90bd..8ac765b9e6a87c9f87d344e687effc0a64f9fb13 100644 (file)
@@ -7,6 +7,7 @@
  *   bulia byak <buliabyak@users.sf.net>
  *   MenTaLguY <mental@rydia.net>
  *   Jon A. Cruz <jon@joncruz.org>
+ *   Abhishek Sharma
  *
  * The original dynadraw code:
  *   Paul Haeberli <paul@sgi.com>
@@ -33,8 +34,9 @@
 #include <numeric>
 
 #include "svg/svg.h"
+#include "display/sp-canvas.h"
 #include "display/canvas-bpath.h"
-#include "display/bezier-utils.h"
+#include <2geom/bezier-utils.h>
 
 #include <glib/gmem.h>
 #include "macros.h"
 #include "desktop.h"
 #include "desktop-events.h"
 #include "desktop-handles.h"
-#include "desktop-affine.h"
 #include "desktop-style.h"
 #include "message-context.h"
-#include "prefs-utils.h"
+#include "preferences.h"
 #include "pixmaps/cursor-eraser.xpm"
-#include "libnr/n-art-bpath.h"
-#include "libnr/nr-path.h"
-#include "libnr/nr-matrix-ops.h"
-#include "libnr/nr-scale-translate-ops.h"
 #include "xml/repr.h"
 #include "context-fns.h"
 #include "sp-item.h"
-#include "inkscape.h"
 #include "color.h"
 #include "rubberband.h"
 #include "splivarot.h"
 #include "display/canvas-bpath.h"
 #include "display/canvas-arena.h"
 #include "livarot/Shape.h"
-#include "isnan.h"
+#include <2geom/isnan.h>
+#include <2geom/pathvector.h>
 
 #include "eraser-context.h"
 
+using Inkscape::DocumentUndo;
+
 #define ERC_RED_RGBA 0xff0000ff
 
 #define TOLERANCE_ERASER 0.1
@@ -88,40 +87,41 @@ static void sp_eraser_context_init(SPEraserContext *erc);
 static void sp_eraser_context_dispose(GObject *object);
 
 static void sp_eraser_context_setup(SPEventContext *ec);
-static void sp_eraser_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
+static void sp_eraser_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);
 static gint sp_eraser_context_root_handler(SPEventContext *ec, GdkEvent *event);
 
 static void clear_current(SPEraserContext *dc);
 static void set_to_accumulated(SPEraserContext *dc);
-static void add_cap(SPCurve *curve, NR::Point const &pre, NR::Point const &from, NR::Point const &to, NR::Point const &post, double rounding);
+static void add_cap(SPCurve *curve, Geom::Point const &pre, Geom::Point const &from, Geom::Point const &to, Geom::Point const &post, double rounding);
 static void accumulate_eraser(SPEraserContext *dc);
 
 static void fit_and_split(SPEraserContext *erc, gboolean release);
 
-static void sp_eraser_reset(SPEraserContext *erc, NR::Point p);
-static NR::Point sp_eraser_get_npoint(SPEraserContext const *erc, NR::Point v);
-static NR::Point sp_eraser_get_vpoint(SPEraserContext const *erc, NR::Point n);
+static void sp_eraser_reset(SPEraserContext *erc, Geom::Point p);
+static Geom::Point sp_eraser_get_npoint(SPEraserContext const *erc, Geom::Point v);
+static Geom::Point sp_eraser_get_vpoint(SPEraserContext const *erc, Geom::Point n);
 static void draw_temporary_box(SPEraserContext *dc);
 
 
-static SPEventContextClass *parent_class;
+static SPEventContextClass *eraser_parent_class = 0;
 
-GtkType
-sp_eraser_context_get_type(void)
+GType sp_eraser_context_get_type(void)
 {
     static GType type = 0;
     if (!type) {
         GTypeInfo info = {
             sizeof(SPEraserContextClass),
-            NULL, NULL,
-            (GClassInitFunc) sp_eraser_context_class_init,
-            NULL, NULL,
+            0, // base_init
+            0, // base_finalize
+            (GClassInitFunc)sp_eraser_context_class_init,
+            0, // class_finalize
+            0, // class_data
             sizeof(SPEraserContext),
-            4,
-            (GInstanceInitFunc) sp_eraser_context_init,
-            NULL,   /* value_table */
+            0, // n_preallocs
+            (GInstanceInitFunc)sp_eraser_context_init,
+            0 // value_table
         };
-        type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPEraserContext", &info, (GTypeFlags)0);
+        type = g_type_register_static(SP_TYPE_COMMON_CONTEXT, "SPEraserContext", &info, static_cast<GTypeFlags>(0));
     }
     return type;
 }
@@ -132,7 +132,7 @@ sp_eraser_context_class_init(SPEraserContextClass *klass)
     GObjectClass *object_class = (GObjectClass *) klass;
     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 
-    parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
+    eraser_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 
     object_class->dispose = sp_eraser_context_dispose;
 
@@ -144,96 +144,39 @@ sp_eraser_context_class_init(SPEraserContextClass *klass)
 static void
 sp_eraser_context_init(SPEraserContext *erc)
 {
-    SPEventContext *event_context = SP_EVENT_CONTEXT(erc);
-
-    event_context->cursor_shape = cursor_eraser_xpm;
-    event_context->hot_x = 4;
-    event_context->hot_y = 4;
-
-    erc->accumulated = NULL;
-    erc->segments = NULL;
-    erc->currentcurve = NULL;
-    erc->currentshape = NULL;
-    erc->npoints = 0;
-    erc->cal1 = NULL;
-    erc->cal2 = NULL;
-    erc->repr = NULL;
-
-    /* Eraser values */
-    erc->cur = NR::Point(0,0);
-    erc->last = NR::Point(0,0);
-    erc->vel = NR::Point(0,0);
-    erc->vel_max = 0;
-    erc->acc = NR::Point(0,0);
-    erc->ang = NR::Point(0,0);
-    erc->del = NR::Point(0,0);
-
-    /* attributes */
-    erc->dragging = FALSE;
-
-    erc->mass = 0.3;
-    erc->drag = DRAG_DEFAULT;
-    erc->angle = 30.0;
-    erc->width = 0.2;
-    erc->pressure = ERC_DEFAULT_PRESSURE;
-
-    erc->vel_thin = 0.1;
-    erc->flatness = 0.9;
-    erc->cap_rounding = 0.0;
-
-    erc->abs_width = false;
+    erc->cursor_shape = cursor_eraser_xpm;
+    erc->hot_x = 4;
+    erc->hot_y = 4;
 }
 
 static void
 sp_eraser_context_dispose(GObject *object)
 {
-    SPEraserContext *erc = SP_ERASER_CONTEXT(object);
-
-    if (erc->accumulated) {
-        erc->accumulated = erc->accumulated->unref();
-    }
-
-    while (erc->segments) {
-        gtk_object_destroy(GTK_OBJECT(erc->segments->data));
-        erc->segments = g_slist_remove(erc->segments, erc->segments->data);
-    }
-
-    if (erc->currentcurve) erc->currentcurve = erc->currentcurve->unref();
-    if (erc->cal1) erc->cal1 = erc->cal1->unref();
-    if (erc->cal2) erc->cal2 = erc->cal2->unref();
-
-    if (erc->currentshape) {
-        gtk_object_destroy(GTK_OBJECT(erc->currentshape));
-        erc->currentshape = 0;
-    }
-
-    if (erc->_message_context) {
-        delete erc->_message_context;
-        erc->_message_context = 0;
-    }
+    //SPEraserContext *erc = SP_ERASER_CONTEXT(object);
 
-    G_OBJECT_CLASS(parent_class)->dispose(object);
+    G_OBJECT_CLASS(eraser_parent_class)->dispose(object);
 }
 
 static void
 sp_eraser_context_setup(SPEventContext *ec)
 {
     SPEraserContext *erc = SP_ERASER_CONTEXT(ec);
+    SPDesktop *desktop = ec->desktop;
 
-    if (((SPEventContextClass *) parent_class)->setup)
-        ((SPEventContextClass *) parent_class)->setup(ec);
+    if (((SPEventContextClass *) eraser_parent_class)->setup)
+        ((SPEventContextClass *) eraser_parent_class)->setup(ec);
 
-    erc->accumulated = new SPCurve(32);
-    erc->currentcurve = new SPCurve(4);
+    erc->accumulated = new SPCurve();
+    erc->currentcurve = new SPCurve();
 
-    erc->cal1 = new SPCurve(32);
-    erc->cal2 = new SPCurve(32);
+    erc->cal1 = new SPCurve();
+    erc->cal2 = new SPCurve();
 
-    erc->currentshape = sp_canvas_item_new(sp_desktop_sketch(ec->desktop), SP_TYPE_CANVAS_BPATH, NULL);
+    erc->currentshape = sp_canvas_item_new(sp_desktop_sketch(desktop), SP_TYPE_CANVAS_BPATH, NULL);
     sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(erc->currentshape), ERC_RED_RGBA, SP_WIND_RULE_EVENODD);
     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(erc->currentshape), 0x00000000, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
     /* fixme: Cannot we cascade it to root more clearly? */
-    g_signal_connect(G_OBJECT(erc->currentshape), "event", G_CALLBACK(sp_desktop_root_handler), ec->desktop);
+    g_signal_connect(G_OBJECT(erc->currentshape), "event", G_CALLBACK(sp_desktop_root_handler), desktop);
 
 /*
 static ProfileFloatElement f_profile[PROFILE_FLOAT_SIZE] = {
@@ -262,9 +205,10 @@ static ProfileFloatElement f_profile[PROFILE_FLOAT_SIZE] = {
 
     erc->is_drawing = false;
 
-    erc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
+    erc->_message_context = new Inkscape::MessageContext(desktop->messageStack());
 
-    if (prefs_get_int_attribute("tools.eraser", "selcue", 0) != 0) {
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    if (prefs->getBool("/tools/eraser/selcue", 0) != 0) {
         ec->enableSelectionCue();
     }
 // TODO temp force:
@@ -273,42 +217,12 @@ static ProfileFloatElement f_profile[PROFILE_FLOAT_SIZE] = {
 }
 
 static void
-sp_eraser_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
+sp_eraser_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val)
 {
-    SPEraserContext *erc = SP_ERASER_CONTEXT(ec);
-
-    if (!strcmp(key, "mass")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.2 );
-        erc->mass = CLAMP(dval, -1000.0, 1000.0);
-    } else if (!strcmp(key, "wiggle")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : (1 - DRAG_DEFAULT));
-        erc->drag = CLAMP((1 - dval), DRAG_MIN, DRAG_MAX); // drag is inverse to wiggle
-    } else if (!strcmp(key, "angle")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0);
-        erc->angle = CLAMP (dval, -90, 90);
-    } else if (!strcmp(key, "width")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
-        erc->width = CLAMP(dval, -1000.0, 1000.0);
-    } else if (!strcmp(key, "thinning")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
-        erc->vel_thin = CLAMP(dval, -1.0, 1.0);
-    } else if (!strcmp(key, "tremor")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
-        erc->tremor = CLAMP(dval, 0.0, 1.0);
-    } else if (!strcmp(key, "flatness")) {
-        double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
-        erc->flatness = CLAMP(dval, 0, 1.0);
-    } else if (!strcmp(key, "usepressure")) {
-        erc->usepressure = (val && strcmp(val, "0"));
-    } else if (!strcmp(key, "usetilt")) {
-        erc->usetilt = (val && strcmp(val, "0"));
-    } else if (!strcmp(key, "abs_width")) {
-        erc->abs_width = (val && strcmp(val, "0"));
-    } else if (!strcmp(key, "cap_rounding")) {
-        erc->cap_rounding = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
+    //pass on up to parent class to handle common attributes.
+    if ( eraser_parent_class->set ) {
+        eraser_parent_class->set(ec, val);
     }
-
-    //g_print("ERC: %g %g %g %g\n", erc->mass, erc->drag, erc->angle, erc->width);
 }
 
 static double
@@ -318,32 +232,32 @@ flerp(double f0, double f1, double p)
 }
 
 /* Get normalized point */
-static NR::Point
-sp_eraser_get_npoint(SPEraserContext const *dc, NR::Point v)
+static Geom::Point
+sp_eraser_get_npoint(SPEraserContext const *dc, Geom::Point v)
 {
-    NR::Rect drect = SP_EVENT_CONTEXT(dc)->desktop->get_display_area();
-    double const max = MAX ( drect.dimensions()[NR::X], drect.dimensions()[NR::Y] );
-    return NR::Point(( v[NR::X] - drect.min()[NR::X] ) / max,  ( v[NR::Y] - drect.min()[NR::Y] ) / max);
+    Geom::Rect drect = SP_EVENT_CONTEXT(dc)->desktop->get_display_area();
+    double const max = MAX ( drect.dimensions()[Geom::X], drect.dimensions()[Geom::Y] );
+    return Geom::Point(( v[Geom::X] - drect.min()[Geom::X] ) / max,  ( v[Geom::Y] - drect.min()[Geom::Y] ) / max);
 }
 
 /* Get view point */
-static NR::Point
-sp_eraser_get_vpoint(SPEraserContext const *dc, NR::Point n)
+static Geom::Point
+sp_eraser_get_vpoint(SPEraserContext const *dc, Geom::Point n)
 {
-    NR::Rect drect = SP_EVENT_CONTEXT(dc)->desktop->get_display_area();
-    double const max = MAX ( drect.dimensions()[NR::X], drect.dimensions()[NR::Y] );
-    return NR::Point(n[NR::X] * max + drect.min()[NR::X], n[NR::Y] * max + drect.min()[NR::Y]);
+    Geom::Rect drect = SP_EVENT_CONTEXT(dc)->desktop->get_display_area();
+    double const max = MAX ( drect.dimensions()[Geom::X], drect.dimensions()[Geom::Y] );
+    return Geom::Point(n[Geom::X] * max + drect.min()[Geom::X], n[Geom::Y] * max + drect.min()[Geom::Y]);
 }
 
 static void
-sp_eraser_reset(SPEraserContext *dc, NR::Point p)
+sp_eraser_reset(SPEraserContext *dc, Geom::Point p)
 {
     dc->last = dc->cur = sp_eraser_get_npoint(dc, p);
-    dc->vel = NR::Point(0,0);
+    dc->vel = Geom::Point(0,0);
     dc->vel_max = 0;
-    dc->acc = NR::Point(0,0);
-    dc->ang = NR::Point(0,0);
-    dc->del = NR::Point(0,0);
+    dc->acc = Geom::Point(0,0);
+    dc->ang = Geom::Point(0,0);
+    dc->del = Geom::Point(0,0);
 }
 
 static void
@@ -367,16 +281,16 @@ sp_eraser_extinput(SPEraserContext *dc, GdkEvent *event)
 
 
 static gboolean
-sp_eraser_apply(SPEraserContext *dc, NR::Point p)
+sp_eraser_apply(SPEraserContext *dc, Geom::Point p)
 {
-    NR::Point n = sp_eraser_get_npoint(dc, p);
+    Geom::Point n = sp_eraser_get_npoint(dc, p);
 
     /* Calculate mass and drag */
     double const mass = flerp(1.0, 160.0, dc->mass);
     double const drag = flerp(0.0, 0.5, dc->drag * dc->drag);
 
     /* Calculate force and acceleration */
-    NR::Point force = n - dc->cur;
+    Geom::Point force = n - dc->cur;
 
     // If force is below the absolute threshold ERASER_EPSILON,
     // or we haven't yet reached ERASER_VEL_START (i.e. at the beginning of stroke)
@@ -385,7 +299,7 @@ sp_eraser_apply(SPEraserContext *dc, NR::Point p)
     // This prevents flips, blobs, and jerks caused by microscopic tremor of the tablet pen,
     // especially bothersome at the start of the stroke where we don't yet have the inertia to
     // smooth them out.
-    if ( NR::L2(force) < ERASER_EPSILON || (dc->vel_max < ERASER_VEL_START && NR::L2(force) < ERASER_EPSILON_START)) {
+    if ( Geom::L2(force) < ERASER_EPSILON || (dc->vel_max < ERASER_VEL_START && Geom::L2(force) < ERASER_EPSILON_START)) {
         return FALSE;
     }
 
@@ -394,8 +308,8 @@ sp_eraser_apply(SPEraserContext *dc, NR::Point p)
     /* Calculate new velocity */
     dc->vel += dc->acc;
 
-    if (NR::L2(dc->vel) > dc->vel_max)
-        dc->vel_max = NR::L2(dc->vel);
+    if (Geom::L2(dc->vel) > dc->vel_max)
+        dc->vel_max = Geom::L2(dc->vel);
 
     /* Calculate angle of drawing tool */
 
@@ -405,7 +319,7 @@ sp_eraser_apply(SPEraserContext *dc, NR::Point p)
         gdouble length = std::sqrt(dc->xtilt*dc->xtilt + dc->ytilt*dc->ytilt);;
 
         if (length > 0) {
-            NR::Point ang1 = NR::Point(dc->ytilt/length, dc->xtilt/length);
+            Geom::Point ang1 = Geom::Point(dc->ytilt/length, dc->xtilt/length);
             a1 = atan2(ang1);
         }
         else
@@ -414,16 +328,16 @@ sp_eraser_apply(SPEraserContext *dc, NR::Point p)
     else {
         // 1b. fixed dc->angle (absolutely flat nib):
         double const radians = ( (dc->angle - 90) / 180.0 ) * M_PI;
-        NR::Point ang1 = NR::Point(-sin(radians),  cos(radians));
+        Geom::Point ang1 = Geom::Point(-sin(radians),  cos(radians));
         a1 = atan2(ang1);
     }
 
     // 2. perpendicular to dc->vel (absolutely non-flat nib):
-    gdouble const mag_vel = NR::L2(dc->vel);
+    gdouble const mag_vel = Geom::L2(dc->vel);
     if ( mag_vel < ERASER_EPSILON ) {
         return FALSE;
     }
-    NR::Point ang2 = NR::rot90(dc->vel) / mag_vel;
+    Geom::Point ang2 = Geom::rot90(dc->vel) / mag_vel;
 
     // 3. Average them using flatness parameter:
     // calculate angles
@@ -445,15 +359,15 @@ sp_eraser_apply(SPEraserContext *dc, NR::Point p)
 
     // Try to detect a sudden flip when the new angle differs too much from the previous for the
     // current velocity; in that case discard this move
-    double angle_delta = NR::L2(NR::Point (cos (new_ang), sin (new_ang)) - dc->ang);
-    if ( angle_delta / NR::L2(dc->vel) > 4000 ) {
+    double angle_delta = Geom::L2(Geom::Point (cos (new_ang), sin (new_ang)) - dc->ang);
+    if ( angle_delta / Geom::L2(dc->vel) > 4000 ) {
         return FALSE;
     }
 
     // convert to point
-    dc->ang = NR::Point (cos (new_ang), sin (new_ang));
+    dc->ang = Geom::Point (cos (new_ang), sin (new_ang));
 
-//    g_print ("force %g  acc %g  vel_max %g  vel %g  a1 %g  a2 %g  new_ang %g\n", NR::L2(force), NR::L2(dc->acc), dc->vel_max, NR::L2(dc->vel), a1, a2, new_ang);
+//    g_print ("force %g  acc %g  vel_max %g  vel %g  a1 %g  a2 %g  new_ang %g\n", Geom::L2(force), Geom::L2(dc->acc), dc->vel_max, Geom::L2(dc->vel), a1, a2, new_ang);
 
     /* Apply drag */
     dc->vel *= 1.0 - drag;
@@ -478,12 +392,12 @@ sp_eraser_brush(SPEraserContext *dc)
 
     // get the real brush point, not the same as pointer (affected by hatch tracking and/or mass
     // drag)
-    NR::Point brush = sp_eraser_get_vpoint(dc, dc->cur);
-    NR::Point brush_w = SP_EVENT_CONTEXT(dc)->desktop->d2w(brush); 
+    Geom::Point brush = sp_eraser_get_vpoint(dc, dc->cur);
+    Geom::Point brush_w = SP_EVENT_CONTEXT(dc)->desktop->d2w(brush); 
 
     double trace_thick = 1;
 
-    double width = (pressure_thick * trace_thick - vel_thin * NR::L2(dc->vel)) * dc->width;
+    double width = (pressure_thick * trace_thick - vel_thin * Geom::L2(dc->vel)) * dc->width;
 
     double tremble_left = 0, tremble_right = 0;
     if (dc->tremor > 0) {
@@ -503,8 +417,8 @@ sp_eraser_brush(SPEraserContext *dc)
         // (2) deflection depends on width, but is upped for small widths for better visual uniformity across widths;
         // (3) deflection somewhat depends on speed, to prevent fast strokes looking
         // comparatively smooth and slow ones excessively jittery
-        tremble_left  = (y1)*dc->tremor * (0.15 + 0.8*width) * (0.35 + 14*NR::L2(dc->vel));
-        tremble_right = (y2)*dc->tremor * (0.15 + 0.8*width) * (0.35 + 14*NR::L2(dc->vel));
+        tremble_left  = (y1)*dc->tremor * (0.15 + 0.8*width) * (0.35 + 14*Geom::L2(dc->vel));
+        tremble_right = (y2)*dc->tremor * (0.15 + 0.8*width) * (0.35 + 14*Geom::L2(dc->vel));
     }
 
     if ( width < 0.02 * dc->width ) {
@@ -516,8 +430,8 @@ sp_eraser_brush(SPEraserContext *dc)
         dezoomify_factor /= SP_EVENT_CONTEXT(dc)->desktop->current_zoom();
     }
 
-    NR::Point del_left = dezoomify_factor * (width + tremble_left) * dc->ang;
-    NR::Point del_right = dezoomify_factor * (width + tremble_right) * dc->ang;
+    Geom::Point del_left = dezoomify_factor * (width + tremble_left) * dc->ang;
+    Geom::Point del_right = dezoomify_factor * (width + tremble_right) * dc->ang;
 
     dc->point1[dc->npoints] = brush + del_left;
     dc->point2[dc->npoints] = brush - del_right;
@@ -567,15 +481,13 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
         case GDK_BUTTON_PRESS:
             if (event->button.button == 1 && !event_context->space_panning) {
 
-                SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
-
                 if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
                     return TRUE;
                 }
 
-                NR::Point const button_w(event->button.x,
+                Geom::Point const button_w(event->button.x,
                                          event->button.y);
-                NR::Point const button_dt(desktop->w2d(button_w));
+                Geom::Point const button_dt(desktop->w2d(button_w));
                 sp_eraser_reset(dc, button_dt);
                 sp_eraser_extinput(dc, event);
                 sp_eraser_apply(dc, button_dt);
@@ -584,8 +496,8 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
                     dc->repr = NULL;
                 }
 
-                Inkscape::Rubberband::get()->start(desktop, button_dt);
-                Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
+                Inkscape::Rubberband::get(desktop)->start(desktop, button_dt);
+                Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
 
                 /* initialize first point */
                 dc->npoints = 0;
@@ -606,9 +518,9 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
             break;
         case GDK_MOTION_NOTIFY:
         {
-            NR::Point const motion_w(event->motion.x,
+            Geom::Point const motion_w(event->motion.x,
                                      event->motion.y);
-            NR::Point motion_dt(desktop->w2d(motion_w));
+            Geom::Point motion_dt(desktop->w2d(motion_w));
             sp_eraser_extinput(dc, event);
 
             dc->_message_context->clear();
@@ -630,15 +542,15 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
                 }
                 ret = TRUE;
             }
-            Inkscape::Rubberband::get()->move(motion_dt);
+            Inkscape::Rubberband::get(desktop)->move(motion_dt);
         }
         break;
 
 
     case GDK_BUTTON_RELEASE:
     {
-        NR::Point const motion_w(event->button.x, event->button.y);
-        NR::Point const motion_dt(desktop->w2d(motion_w));
+        Geom::Point const motion_w(event->button.x, event->button.y);
+        Geom::Point const motion_dt(desktop->w2d(motion_w));
 
         sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time);
         sp_canvas_end_forced_full_redraws(desktop->canvas);
@@ -647,8 +559,6 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
         if (dc->dragging && event->button.button == 1 && !event_context->space_panning) {
             dc->dragging = FALSE;
 
-            NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
-
             sp_eraser_apply(dc, motion_dt);
 
             /* Remove all temporary line segments */
@@ -670,10 +580,13 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
                 dc->repr = NULL;
             }
 
-            Inkscape::Rubberband::get()->stop();
             dc->_message_context->clear();
             ret = TRUE;
         }
+        if (Inkscape::Rubberband::get(desktop)->is_started()) {
+            Inkscape::Rubberband::get(desktop)->stop();
+        }
+            
         break;
     }
 
@@ -739,7 +652,7 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
             }
             break;
         case GDK_Escape:
-            Inkscape::Rubberband::get()->stop();
+            Inkscape::Rubberband::get(desktop)->stop();
             if (dc->is_drawing) {
                 // if drawing, cancel, otherwise pass it up for deselecting
                 eraser_cancel (dc);
@@ -774,8 +687,8 @@ sp_eraser_context_root_handler(SPEventContext *event_context,
     }
 
     if (!ret) {
-        if (((SPEventContextClass *) parent_class)->root_handler) {
-            ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
+        if (((SPEventContextClass *) eraser_parent_class)->root_handler) {
+            ret = ((SPEventContextClass *) eraser_parent_class)->root_handler(event_context, event);
         }
     }
 
@@ -805,48 +718,46 @@ set_to_accumulated(SPEraserContext *dc)
     bool workDone = false;
 
     if (!dc->accumulated->is_empty()) {
-        NArtBpath *abp;
-        gchar *str;
-
         if (!dc->repr) {
             /* Create object */
-            Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
+            Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 
             /* Set style */
-            sp_desktop_apply_style_tool (desktop, repr, "tools.eraser", false);
+            sp_desktop_apply_style_tool (desktop, repr, "/tools/eraser", false);
 
             dc->repr = repr;
 
             SPItem *item=SP_ITEM(desktop->currentLayer()->appendChildRepr(dc->repr));
             Inkscape::GC::release(dc->repr);
-            item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
+            item->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse();
             item->updateRepr();
         }
-        abp = nr_artpath_affine(dc->accumulated->first_bpath(), sp_desktop_dt2root_affine(desktop));
-        str = sp_svg_write_path(abp);
+        Geom::PathVector pathv = dc->accumulated->get_pathvector() * desktop->dt2doc();
+        gchar *str = sp_svg_write_path(pathv);
         g_assert( str != NULL );
-        g_free(abp);
         dc->repr->setAttribute("d", str);
         g_free(str);
 
         if ( dc->repr ) {
             bool wasSelection = false;
             Inkscape::Selection *selection = sp_desktop_selection(desktop);
-            gint eraserMode = (prefs_get_int_attribute("tools.eraser", "mode", 0) != 0) ? 1 : 0;
-            Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
+            Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+            
+            gint eraserMode = prefs->getBool("/tools/eraser/mode") ? 1 : 0;
+            Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
 
             SPItem* acid = SP_ITEM(desktop->doc()->getObjectByRepr(dc->repr));
-            NR::Maybe<NR::Rect> eraserBbox = acid->getBounds(NR::identity());
-            NR::Rect bounds = (*eraserBbox) * desktop->doc2dt();
+            Geom::OptRect eraserBbox = acid->getBounds(Geom::identity());
+            Geom::Rect bounds = (*eraserBbox) * desktop->doc2dt();
             std::vector<SPItem*> remainingItems;
             GSList* toWorkOn = 0;
             if (selection->isEmpty()) {
                 if ( eraserMode ) {
-                    toWorkOn = sp_document_partial_items_in_box(sp_desktop_document(desktop), desktop->dkey, bounds);
+                    toWorkOn = sp_desktop_document(desktop)->getItemsPartiallyInBox(desktop->dkey, bounds);
                 } else {
-                    Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
-                    toWorkOn = sp_document_items_at_points(sp_desktop_document(desktop), desktop->dkey, r->getPoints());
+                    Inkscape::Rubberband *r = Inkscape::Rubberband::get(desktop);
+                    toWorkOn = sp_desktop_document(desktop)->getItemsAtPoints(desktop->dkey, r->getPoints());
                 }
                 toWorkOn = g_slist_remove( toWorkOn, acid );
             } else {
@@ -859,7 +770,7 @@ set_to_accumulated(SPEraserContext *dc)
                     for (GSList *i = toWorkOn ; i ; i = i->next ) {
                         SPItem *item = SP_ITEM(i->data);
                         if ( eraserMode ) {
-                            NR::Maybe<NR::Rect> bbox = item->getBounds(NR::identity());
+                            Geom::OptRect bbox = item->getBounds(Geom::identity());
                             if (bbox && bbox->intersects(*eraserBbox)) {
                                 Inkscape::XML::Node* dup = dc->repr->duplicate(xml_doc);
                                 dc->repr->parent()->appendChild(dup);
@@ -867,7 +778,7 @@ set_to_accumulated(SPEraserContext *dc)
 
                                 selection->set(item);
                                 selection->add(dup);
-                                sp_selected_path_diff_skip_undo();
+                                sp_selected_path_diff_skip_undo(desktop);
                                 workDone = true; // TODO set this only if something was cut.
                                 if ( !selection->isEmpty() ) {
                                     // If the item was not completely erased, track the new remainder.
@@ -897,7 +808,7 @@ set_to_accumulated(SPEraserContext *dc)
                 g_slist_free(toWorkOn);
 
                 if ( !eraserMode ) {
-                    //sp_selection_delete();
+                    //sp_selection_delete(desktop);
                     remainingItems.clear();
                 }
 
@@ -922,39 +833,39 @@ set_to_accumulated(SPEraserContext *dc)
 
 
     if ( workDone ) {
-        sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_ERASER, 
-                         _("Draw eraser stroke"));
+        DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_CONTEXT_ERASER, 
+                           _("Draw eraser stroke"));
     } else {
-        sp_document_cancel(sp_desktop_document(desktop));
+        DocumentUndo::cancel(sp_desktop_document(desktop));
     }
 }
 
 static void
 add_cap(SPCurve *curve,
-        NR::Point const &pre, NR::Point const &from,
-        NR::Point const &to, NR::Point const &post,
+        Geom::Point const &pre, Geom::Point const &from,
+        Geom::Point const &to, Geom::Point const &post,
         double rounding)
 {
-    NR::Point vel = rounding * NR::rot90( to - from ) / sqrt(2.0);
-    double mag = NR::L2(vel);
+    Geom::Point vel = rounding * Geom::rot90( to - from ) / sqrt(2.0);
+    double mag = Geom::L2(vel);
 
-    NR::Point v_in = from - pre;
-    double mag_in = NR::L2(v_in);
+    Geom::Point v_in = from - pre;
+    double mag_in = Geom::L2(v_in);
     if ( mag_in > ERASER_EPSILON ) {
         v_in = mag * v_in / mag_in;
     } else {
-        v_in = NR::Point(0, 0);
+        v_in = Geom::Point(0, 0);
     }
 
-    NR::Point v_out = to - post;
-    double mag_out = NR::L2(v_out);
+    Geom::Point v_out = to - post;
+    double mag_out = Geom::L2(v_out);
     if ( mag_out > ERASER_EPSILON ) {
         v_out = mag * v_out / mag_out;
     } else {
-        v_out = NR::Point(0, 0);
+        v_out = Geom::Point(0, 0);
     }
 
-    if ( NR::L2(v_in) > ERASER_EPSILON || NR::L2(v_out) > ERASER_EPSILON ) {
+    if ( Geom::L2(v_in) > ERASER_EPSILON || Geom::L2(v_out) > ERASER_EPSILON ) {
         curve->curveto(from + v_in, to + v_out, to);
     }
 }
@@ -964,24 +875,29 @@ accumulate_eraser(SPEraserContext *dc)
 {
     if ( !dc->cal1->is_empty() && !dc->cal2->is_empty() ) {
         dc->accumulated->reset(); /*  Is this required ?? */
-        SPCurve *rev_cal2 = dc->cal2->reverse();
-
-        g_assert(dc->cal1->end > 1);
-        g_assert(rev_cal2->end > 1);
-        g_assert(SP_CURVE_SEGMENT(dc->cal1, 0)->code == NR_MOVETO_OPEN);
-        g_assert(SP_CURVE_SEGMENT(rev_cal2, 0)->code == NR_MOVETO_OPEN);
-        g_assert(SP_CURVE_SEGMENT(dc->cal1, 1)->code == NR_CURVETO);
-        g_assert(SP_CURVE_SEGMENT(rev_cal2, 1)->code == NR_CURVETO);
-        g_assert(SP_CURVE_SEGMENT(dc->cal1, dc->cal1->end-1)->code == NR_CURVETO);
-        g_assert(SP_CURVE_SEGMENT(rev_cal2, rev_cal2->end-1)->code == NR_CURVETO);
+        SPCurve *rev_cal2 = dc->cal2->create_reverse();
+
+        g_assert(dc->cal1->get_segment_count() > 0);
+        g_assert(rev_cal2->get_segment_count() > 0);
+        g_assert( ! dc->cal1->first_path()->closed() );
+        g_assert( ! rev_cal2->first_path()->closed() );
+
+        Geom::CubicBezier const * dc_cal1_firstseg  = dynamic_cast<Geom::CubicBezier const *>( dc->cal1->first_segment() );
+        Geom::CubicBezier const * rev_cal2_firstseg = dynamic_cast<Geom::CubicBezier const *>( rev_cal2->first_segment() );
+        Geom::CubicBezier const * dc_cal1_lastseg   = dynamic_cast<Geom::CubicBezier const *>( dc->cal1->last_segment() );
+        Geom::CubicBezier const * rev_cal2_lastseg  = dynamic_cast<Geom::CubicBezier const *>( rev_cal2->last_segment() );
+        g_assert( dc_cal1_firstseg );
+        g_assert( rev_cal2_firstseg );
+        g_assert( dc_cal1_lastseg );
+        g_assert( rev_cal2_lastseg );
 
         dc->accumulated->append(dc->cal1, FALSE);
 
-        add_cap(dc->accumulated, SP_CURVE_SEGMENT(dc->cal1, dc->cal1->end-1)->c(2), SP_CURVE_SEGMENT(dc->cal1, dc->cal1->end-1)->c(3), SP_CURVE_SEGMENT(rev_cal2, 0)->c(3), SP_CURVE_SEGMENT(rev_cal2, 1)->c(1), dc->cap_rounding);
+        add_cap(dc->accumulated, (*dc_cal1_lastseg)[2], (*dc_cal1_lastseg)[3], (*rev_cal2_firstseg)[0], (*rev_cal2_firstseg)[1], dc->cap_rounding);
 
         dc->accumulated->append(rev_cal2, TRUE);
 
-        add_cap(dc->accumulated, SP_CURVE_SEGMENT(rev_cal2, rev_cal2->end-1)->c(2), SP_CURVE_SEGMENT(rev_cal2, rev_cal2->end-1)->c(3), SP_CURVE_SEGMENT(dc->cal1, 0)->c(3), SP_CURVE_SEGMENT(dc->cal1, 1)->c(1), dc->cap_rounding);
+        add_cap(dc->accumulated, (*rev_cal2_lastseg)[2], (*rev_cal2_lastseg)[3], (*dc_cal1_firstseg)[0], (*dc_cal1_firstseg)[1], dc->cap_rounding);
 
         dc->accumulated->closepath();
 
@@ -1000,7 +916,9 @@ static double square(double const x)
 static void
 fit_and_split(SPEraserContext *dc, gboolean release)
 {
-    double const tolerance_sq = square( NR::expansion(SP_EVENT_CONTEXT(dc)->desktop->w2d()) * TOLERANCE_ERASER );
+    SPDesktop *desktop = SP_EVENT_CONTEXT(dc)->desktop;
+
+    double const tolerance_sq = square( desktop->w2d().descrim() * TOLERANCE_ERASER );
 
 #ifdef ERASER_VERBOSE
     g_print("[F&S:R=%c]", release?'T':'F');
@@ -1020,7 +938,7 @@ fit_and_split(SPEraserContext *dc, gboolean release)
 #endif
 
         /* Current eraser */
-        if ( dc->cal1->end == 0 || dc->cal2->end == 0 ) {
+        if ( dc->cal1->is_empty() || dc->cal2->is_empty() ) {
             /* dc->npoints > 0 */
             /* g_print("erasers(1|2) reset\n"); */
             dc->cal1->reset();
@@ -1030,13 +948,13 @@ fit_and_split(SPEraserContext *dc, gboolean release)
             dc->cal2->moveto(dc->point2[0]);
         }
 
-        NR::Point b1[BEZIER_MAX_LENGTH];
-        gint const nb1 = sp_bezier_fit_cubic_r(b1, dc->point1, dc->npoints,
+        Geom::Point b1[BEZIER_MAX_LENGTH];
+        gint const nb1 = Geom::bezier_fit_cubic_r(b1, dc->point1, dc->npoints,
                                                tolerance_sq, BEZIER_MAX_BEZIERS);
         g_assert( nb1 * BEZIER_SIZE <= gint(G_N_ELEMENTS(b1)) );
 
-        NR::Point b2[BEZIER_MAX_LENGTH];
-        gint const nb2 = sp_bezier_fit_cubic_r(b2, dc->point2, dc->npoints,
+        Geom::Point b2[BEZIER_MAX_LENGTH];
+        gint const nb2 = Geom::bezier_fit_cubic_r(b2, dc->point2, dc->npoints,
                                                tolerance_sq, BEZIER_MAX_BEZIERS);
         g_assert( nb2 * BEZIER_SIZE <= gint(G_N_ELEMENTS(b2)) );
 
@@ -1049,12 +967,12 @@ fit_and_split(SPEraserContext *dc, gboolean release)
             if (! release) {
                 dc->currentcurve->reset();
                 dc->currentcurve->moveto(b1[0]);
-                for (NR::Point *bp1 = b1; bp1 < b1 + BEZIER_SIZE * nb1; bp1 += BEZIER_SIZE) {
+                for (Geom::Point *bp1 = b1; bp1 < b1 + BEZIER_SIZE * nb1; bp1 += BEZIER_SIZE) {
                     dc->currentcurve->curveto(bp1[1],
                                      bp1[2], bp1[3]);
                 }
                 dc->currentcurve->lineto(b2[BEZIER_SIZE*(nb2-1) + 3]);
-                for (NR::Point *bp2 = b2 + BEZIER_SIZE * ( nb2 - 1 ); bp2 >= b2; bp2 -= BEZIER_SIZE) {
+                for (Geom::Point *bp2 = b2 + BEZIER_SIZE * ( nb2 - 1 ); bp2 >= b2; bp2 -= BEZIER_SIZE) {
                     dc->currentcurve->curveto(bp2[2], bp2[1], bp2[0]);
                 }
                 // FIXME: dc->segments is always NULL at this point??
@@ -1066,10 +984,10 @@ fit_and_split(SPEraserContext *dc, gboolean release)
             }
 
             /* Current eraser */
-            for (NR::Point *bp1 = b1; bp1 < b1 + BEZIER_SIZE * nb1; bp1 += BEZIER_SIZE) {
+            for (Geom::Point *bp1 = b1; bp1 < b1 + BEZIER_SIZE * nb1; bp1 += BEZIER_SIZE) {
                 dc->cal1->curveto(bp1[1], bp1[2], bp1[3]);
             }
-            for (NR::Point *bp2 = b2; bp2 < b2 + BEZIER_SIZE * nb2; bp2 += BEZIER_SIZE) {
+            for (Geom::Point *bp2 = b2; bp2 < b2 + BEZIER_SIZE * nb2; bp2 += BEZIER_SIZE) {
                 dc->cal2->curveto(bp2[1], bp2[2], bp2[3]);
             }
         } else {
@@ -1092,27 +1010,28 @@ fit_and_split(SPEraserContext *dc, gboolean release)
         g_print("[%d]Yup\n", dc->npoints);
 #endif
         if (!release) {
-            gint eraserMode = (prefs_get_int_attribute("tools.eraser", "mode", 0) != 0) ? 1 : 0;
+            Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+            gint eraserMode = prefs->getBool("/tools/eraser/mode") ? 1 : 0;
             g_assert(!dc->currentcurve->is_empty());
 
-            SPCanvasItem *cbp = sp_canvas_item_new(sp_desktop_sketch(SP_EVENT_CONTEXT(dc)->desktop),
+            SPCanvasItem *cbp = sp_canvas_item_new(sp_desktop_sketch(desktop),
                                                    SP_TYPE_CANVAS_BPATH,
                                                    NULL);
             SPCurve *curve = dc->currentcurve->copy();
             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH (cbp), curve);
             curve->unref();
 
-            guint32 fillColor = sp_desktop_get_color_tool (SP_ACTIVE_DESKTOP, "tools.eraser", true);
-            //guint32 strokeColor = sp_desktop_get_color_tool (SP_ACTIVE_DESKTOP, "tools.eraser", false);
-            double opacity = sp_desktop_get_master_opacity_tool (SP_ACTIVE_DESKTOP, "tools.eraser");
-            double fillOpacity = sp_desktop_get_opacity_tool (SP_ACTIVE_DESKTOP, "tools.eraser", true);
-            //double strokeOpacity = sp_desktop_get_opacity_tool (SP_ACTIVE_DESKTOP, "tools.eraser", false);
+            guint32 fillColor = sp_desktop_get_color_tool (desktop, "/tools/eraser", true);
+            //guint32 strokeColor = sp_desktop_get_color_tool (desktop, "/tools/eraser", false);
+            double opacity = sp_desktop_get_master_opacity_tool (desktop, "/tools/eraser");
+            double fillOpacity = sp_desktop_get_opacity_tool (desktop, "/tools/eraser", true);
+            //double strokeOpacity = sp_desktop_get_opacity_tool (desktop, "/tools/eraser", false);
             sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cbp), ((fillColor & 0xffffff00) | SP_COLOR_F_TO_U(opacity*fillOpacity)), SP_WIND_RULE_EVENODD);
             //on second thougtht don't do stroke yet because we don't have stoke-width yet and because stoke appears between segments while drawing
             //sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cbp), ((strokeColor & 0xffffff00) | SP_COLOR_F_TO_U(opacity*strokeOpacity)), 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
             sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cbp), 0x00000000, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
             /* fixme: Cannot we cascade it to root more clearly? */
-            g_signal_connect(G_OBJECT(cbp), "event", G_CALLBACK(sp_desktop_root_handler), SP_EVENT_CONTEXT(dc)->desktop);
+            g_signal_connect(G_OBJECT(cbp), "event", G_CALLBACK(sp_desktop_root_handler), desktop);
 
             dc->segments = g_slist_prepend(dc->segments, cbp);
 
@@ -1159,4 +1078,4 @@ draw_temporary_box(SPEraserContext *dc)
   fill-column:99
   End:
 */
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :