Moved and renamed some tool-related files.

(bzr r12785)

1 files changed, 0 insertions, 916 deletions

diff --git a/src/pencil-context.cpp b/src/pencil-context.cpp
deleted file mode 100644
index bd9dac5dc..000000000
--- a/src/pencil-context.cpp
+++ /dev/null
@@ -1,916 +0,0 @@
-/** \file
- * Pencil event context implementation.
- */
-
-/*
- * Authors:
- *   Lauris Kaplinski <lauris@kaplinski.com>
- *   bulia byak <buliabyak@users.sf.net>
- *   Jon A. Cruz <jon@joncruz.org>
- *
- * Copyright (C) 2000 Lauris Kaplinski
- * Copyright (C) 2000-2001 Ximian, Inc.
- * Copyright (C) 2002 Lauris Kaplinski
- * Copyright (C) 2004 Monash University
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#include <gdk/gdkkeysyms.h>
-
-#include "pencil-context.h"
-#include "desktop.h"
-#include "desktop-handles.h"
-#include "selection.h"
-#include "selection-chemistry.h"
-#include "draw-anchor.h"
-#include "message-stack.h"
-#include "message-context.h"
-#include "modifier-fns.h"
-#include "sp-path.h"
-#include "preferences.h"
-#include "snap.h"
-#include "pixmaps/cursor-pencil.xpm"
-#include <2geom/sbasis-to-bezier.h>
-#include <2geom/bezier-utils.h>
-#include "display/canvas-bpath.h"
-#include <glibmm/i18n.h>
-#include "context-fns.h"
-#include "sp-namedview.h"
-#include "xml/repr.h"
-#include "document.h"
-#include "desktop-style.h"
-#include "macros.h"
-#include "display/sp-canvas.h"
-#include "display/curve.h"
-#include "livarot/Path.h"
-#include "tool-factory.h"
-
-namespace Inkscape {
-namespace UI {
-namespace Tools {
-
-static gint pencil_handle_button_press(PencilTool *const pc, GdkEventButton const &bevent);
-static gint pencil_handle_motion_notify(PencilTool *const pc, GdkEventMotion const &mevent);
-static gint pencil_handle_button_release(PencilTool *const pc, GdkEventButton const &revent);
-static gint pencil_handle_key_press(PencilTool *const pc, guint const keyval, guint const state);
-static gint pencil_handle_key_release(PencilTool *const pc, guint const keyval, guint const state);
-
-static void spdc_set_startpoint(PencilTool *pc, Geom::Point const &p);
-static void spdc_set_endpoint(PencilTool *pc, Geom::Point const &p);
-static void spdc_finish_endpoint(PencilTool *pc);
-static void spdc_add_freehand_point(PencilTool *pc, Geom::Point const &p, guint state);
-static void fit_and_split(PencilTool *pc);
-static void interpolate(PencilTool *pc);
-static void sketch_interpolate(PencilTool *pc);
-
-static Geom::Point pencil_drag_origin_w(0, 0);
-static bool pencil_within_tolerance = false;
-
-static bool in_svg_plane(Geom::Point const &p) { return Geom::LInfty(p) < 1e18; }
-
-namespace {
-	ToolBase* createPencilContext() {
-		return new PencilTool();
-	}
-
-	bool pencilContextRegistered = ToolFactory::instance().registerObject("/tools/freehand/pencil", createPencilContext);
-}
-
-const std::string& PencilTool::getPrefsPath() {
-	return PencilTool::prefsPath;
-}
-
-const std::string PencilTool::prefsPath = "/tools/freehand/pencil";
-
-PencilTool::PencilTool() :
-    SPDrawContext(),
-    p(),
-    npoints(0),
-    state(SP_PENCIL_CONTEXT_IDLE),
-    req_tangent(0,0),
-    is_drawing(false),
-    ps(),
-    sketch_interpolation(Geom::Piecewise<Geom::D2<Geom::SBasis> >())// since PencilTool is not properly constructed...
-{
-    this->cursor_shape = cursor_pencil_xpm;
-    this->hot_x = 4;
-    this->hot_y = 4;
-    this->sketch_n = 0;
-}
-
-void PencilTool::setup() {
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    if (prefs->getBool("/tools/freehand/pencil/selcue")) {
-        this->enableSelectionCue();
-    }
-
-    SPDrawContext::setup();
-
-    this->is_drawing = false;
-    this->anchor_statusbar = false;
-}
-
-PencilTool::~PencilTool() {
-}
-
-/** Snaps new node relative to the previous node. */
-static void
-spdc_endpoint_snap(PencilTool const *pc, Geom::Point &p, guint const state)
-{
-    if ((state & GDK_CONTROL_MASK)) { //CTRL enables constrained snapping
-        if (pc->npoints > 0) {
-            spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
-        }
-    } else {
-        if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above
-                                         //After all, the user explicitely asked for angular snapping by
-                                         //pressing CTRL
-            boost::optional<Geom::Point> origin = pc->npoints > 0 ? pc->p[0] : boost::optional<Geom::Point>();
-            spdc_endpoint_snap_free(pc, p, origin, state);
-        }
-    }
-}
-
-/**
- * Callback for handling all pencil context events.
- */
-bool PencilTool::root_handler(GdkEvent* event) {
-    gint ret = FALSE;
-
-    switch (event->type) {
-        case GDK_BUTTON_PRESS:
-            ret = pencil_handle_button_press(this, event->button);
-            break;
-
-        case GDK_MOTION_NOTIFY:
-            ret = pencil_handle_motion_notify(this, event->motion);
-            break;
-
-        case GDK_BUTTON_RELEASE:
-            ret = pencil_handle_button_release(this, event->button);
-            break;
-
-        case GDK_KEY_PRESS:
-            ret = pencil_handle_key_press(this, get_group0_keyval (&event->key), event->key.state);
-            break;
-
-        case GDK_KEY_RELEASE:
-            ret = pencil_handle_key_release(this, get_group0_keyval (&event->key), event->key.state);
-            break;
-
-        default:
-            break;
-    }
-
-    if (!ret) {
-    	ret = SPDrawContext::root_handler(event);
-    }
-
-    return ret;
-}
-
-static gint
-pencil_handle_button_press(PencilTool *const pc, GdkEventButton const &bevent)
-{
-    gint ret = FALSE;
-    ToolBase *event_context = SP_EVENT_CONTEXT(pc);
-    if ( bevent.button == 1  && !event_context->space_panning) {
-
-        SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
-        SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
-        Inkscape::Selection *selection = sp_desktop_selection(desktop);
-
-        if (Inkscape::have_viable_layer(desktop, dc->message_context) == false) {
-            return TRUE;
-        }
-
-        if (!pc->grab) {
-            /* Grab mouse, so release will not pass unnoticed */
-            pc->grab = SP_CANVAS_ITEM(desktop->acetate);
-            sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK   |
-                                            GDK_BUTTON_RELEASE_MASK |
-                                            GDK_POINTER_MOTION_MASK  ),
-                                NULL, bevent.time);
-        }
-
-        Geom::Point const button_w(bevent.x, bevent.y);
-
-        /* Find desktop coordinates */
-        Geom::Point p = pc->desktop->w2d(button_w);
-
-        /* Test whether we hit any anchor. */
-        SPDrawAnchor *anchor = spdc_test_inside(pc, button_w);
-
-        pencil_drag_origin_w = Geom::Point(bevent.x,bevent.y);
-        pencil_within_tolerance = true;
-
-        switch (pc->state) {
-            case SP_PENCIL_CONTEXT_ADDLINE:
-                /* Current segment will be finished with release */
-                ret = TRUE;
-                break;
-            default:
-                /* Set first point of sequence */
-                SnapManager &m = desktop->namedview->snap_manager;
-
-                if (bevent.state & GDK_CONTROL_MASK) {
-                    m.setup(desktop);
-                    if (!(bevent.state & GDK_SHIFT_MASK)) {
-                        m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
-                      }
-                    spdc_create_single_dot(event_context, p, "/tools/freehand/pencil", bevent.state);
-                    m.unSetup();
-                    ret = true;
-                    break;
-                }
-                if (anchor) {
-                    p = anchor->dp;
-                    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
-                } else {
-                    m.setup(desktop);
-                    if (!(bevent.state & GDK_SHIFT_MASK)) {
-                        // This is the first click of a new curve; deselect item so that
-                        // this curve is not combined with it (unless it is drawn from its
-                        // anchor, which is handled by the sibling branch above)
-                        selection->clear();
-                        desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
-                        m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
-                    } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
-                        desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
-                        m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
-                    }
-                    m.unSetup();
-                }
-                pc->sa = anchor;
-                spdc_set_startpoint(pc, p);
-                ret = TRUE;
-                break;
-        }
-
-        pc->is_drawing = true;
-    }
-    return ret;
-}
-
-static gint
-pencil_handle_motion_notify(PencilTool *const pc, GdkEventMotion const &mevent)
-{
-    SPDesktop *const dt = pc->desktop;
-
-    if ((mevent.state & GDK_CONTROL_MASK) && (mevent.state & GDK_BUTTON1_MASK)) {
-        // mouse was accidentally moved during Ctrl+click;
-        // ignore the motion and create a single point
-        pc->is_drawing = false;
-        return TRUE;
-    }
-    gint ret = FALSE;
-
-    ToolBase *event_context = SP_EVENT_CONTEXT(pc);
-    if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
-        // allow scrolling
-        return FALSE;
-    }
-
-    if ( ( mevent.state & GDK_BUTTON1_MASK ) && !pc->grab && pc->is_drawing) {
-        /* Grab mouse, so release will not pass unnoticed */
-        pc->grab = SP_CANVAS_ITEM(dt->acetate);
-        sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK   |
-                                        GDK_BUTTON_RELEASE_MASK |
-                                        GDK_POINTER_MOTION_MASK  ),
-                            NULL, mevent.time);
-    }
-
-    /* Find desktop coordinates */
-    Geom::Point p = dt->w2d(Geom::Point(mevent.x, mevent.y));
-
-    /* Test whether we hit any anchor. */
-    SPDrawAnchor *anchor = spdc_test_inside(pc, Geom::Point(mevent.x, mevent.y));
-
-    if (pencil_within_tolerance) {
-        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-        gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
-        if ( Geom::LInfty( Geom::Point(mevent.x,mevent.y) - pencil_drag_origin_w ) < tolerance ) {
-            return FALSE;   // 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 move the object, not click), then always process the
-    // motion notify coordinates as given (no snapping back to origin)
-    pencil_within_tolerance = false;
-
-    switch (pc->state) {
-        case SP_PENCIL_CONTEXT_ADDLINE:
-            /* Set red endpoint */
-            if (anchor) {
-                p = anchor->dp;
-            } else {
-                Geom::Point ptnr(p);
-                spdc_endpoint_snap(pc, ptnr, mevent.state);
-                p = ptnr;
-            }
-            spdc_set_endpoint(pc, p);
-            ret = TRUE;
-            break;
-        default:
-            /* We may be idle or already freehand */
-            if ( mevent.state & GDK_BUTTON1_MASK && pc->is_drawing ) {
-                if (pc->state == SP_PENCIL_CONTEXT_IDLE) {
-                    sp_event_context_discard_delayed_snap_event(event_context);
-                }
-                pc->state = SP_PENCIL_CONTEXT_FREEHAND;
-
-                if ( !pc->sa && !pc->green_anchor ) {
-                    /* Create green anchor */
-                    pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, pc->p[0]);
-                }
-                if (anchor) {
-                    p = anchor->dp;
-                }
-
-                if ( pc->npoints != 0) { // buttonpress may have happened before we entered draw context!
-                    if (pc->ps.empty()) {
-                        // Only in freehand mode we have to add the first point also to pc->ps (apparently)
-                        // - We cannot add this point in spdc_set_startpoint, because we only need it for freehand
-                        // - We cannot do this in the button press handler because at that point we don't know yet
-                        //   wheter we're going into freehand mode or not
-                        pc->ps.push_back(pc->p[0]);
-                    }
-                    spdc_add_freehand_point(pc, p, mevent.state);
-                    ret = TRUE;
-                }
-
-                if (anchor && !pc->anchor_statusbar) {
-                    pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Release</b> here to close and finish the path."));
-                    pc->anchor_statusbar = true;
-                } else if (!anchor && pc->anchor_statusbar) {
-                    pc->message_context->clear();
-                    pc->anchor_statusbar = false;
-                } else if (!anchor) {
-                    pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("Drawing a freehand path"));
-                }
-
-            } else {
-                if (anchor && !pc->anchor_statusbar) {
-                    pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Drag</b> to continue the path from this point."));
-                    pc->anchor_statusbar = true;
-                } else if (!anchor && pc->anchor_statusbar) {
-                    pc->message_context->clear();
-                    pc->anchor_statusbar = false;
-                }
-            }
-
-            // Show the pre-snap indicator to communicate to the user where we would snap to if he/she were to
-            // a) press the mousebutton to start a freehand drawing, or
-            // b) release the mousebutton to finish a freehand drawing
-            if (!sp_event_context_knot_mouseover(pc)) {
-                SnapManager &m = dt->namedview->snap_manager;
-                m.setup(dt);
-                m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
-                m.unSetup();
-            }
-            break;
-    }
-    return ret;
-}
-
-static gint
-pencil_handle_button_release(PencilTool *const pc, GdkEventButton const &revent)
-{
-    gint ret = FALSE;
-
-    ToolBase *event_context = SP_EVENT_CONTEXT(pc);
-    if ( revent.button == 1 && pc->is_drawing && !event_context->space_panning) {
-        SPDesktop *const dt = pc->desktop;
-
-        pc->is_drawing = false;
-
-        /* Find desktop coordinates */
-        Geom::Point p = dt->w2d(Geom::Point(revent.x, revent.y));
-
-        /* Test whether we hit any anchor. */
-        SPDrawAnchor *anchor = spdc_test_inside(pc, Geom::Point(revent.x,
-                                                              revent.y));
-
-        switch (pc->state) {
-            case SP_PENCIL_CONTEXT_IDLE:
-                /* Releasing button in idle mode means single click */
-                /* We have already set up start point/anchor in button_press */
-                if (!(revent.state & GDK_CONTROL_MASK)) {
-                    // Ctrl+click creates a single point so only set context in ADDLINE mode when Ctrl isn't pressed
-                    pc->state = SP_PENCIL_CONTEXT_ADDLINE;
-                }
-                ret = TRUE;
-                break;
-            case SP_PENCIL_CONTEXT_ADDLINE:
-                /* Finish segment now */
-                if (anchor) {
-                    p = anchor->dp;
-                } else {
-                    spdc_endpoint_snap(pc, p, revent.state);
-                }
-                pc->ea = anchor;
-                spdc_set_endpoint(pc, p);
-                spdc_finish_endpoint(pc);
-                pc->state = SP_PENCIL_CONTEXT_IDLE;
-                sp_event_context_discard_delayed_snap_event(event_context);
-                ret = TRUE;
-                break;
-            case SP_PENCIL_CONTEXT_FREEHAND:
-                if (revent.state & GDK_MOD1_MASK) {
-                    /* sketch mode: interpolate the sketched path and improve the current output path with the new interpolation. don't finish sketch */
-
-                    sketch_interpolate(pc);
-
-                    if (pc->green_anchor) {
-                        pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
-                    }
-
-                    pc->state = SP_PENCIL_CONTEXT_SKETCH;
-                } else {
-                    /* Finish segment now */
-                    /// \todo fixme: Clean up what follows (Lauris)
-                    if (anchor) {
-                        p = anchor->dp;
-                    } else {
-                        Geom::Point p_end = p;
-                        spdc_endpoint_snap(pc, p_end, revent.state);
-                        if (p_end != p) {
-                            // then we must have snapped!
-                            spdc_add_freehand_point(pc, p_end, revent.state);
-                        }
-                    }
-
-                    pc->ea = anchor;
-                    /* Write curves to object */
-
-                    dt->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing freehand"));
-
-                    interpolate(pc);
-                    spdc_concat_colors_and_flush(pc, FALSE);
-                    pc->sa = NULL;
-                    pc->ea = NULL;
-                    if (pc->green_anchor) {
-                        pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
-                    }
-                    pc->state = SP_PENCIL_CONTEXT_IDLE;
-                    // reset sketch mode too
-                    pc->sketch_n = 0;
-                }
-                ret = TRUE;
-                break;
-            case SP_PENCIL_CONTEXT_SKETCH:
-            default:
-                break;
-        }
-
-        if (pc->grab) {
-            /* Release grab now */
-            sp_canvas_item_ungrab(pc->grab, revent.time);
-            pc->grab = NULL;
-        }
-
-        ret = TRUE;
-    }
-    return ret;
-}
-
-static void
-pencil_cancel (PencilTool *const pc)
-{
-    if (pc->grab) {
-        /* Release grab now */
-        sp_canvas_item_ungrab(pc->grab, 0);
-        pc->grab = NULL;
-    }
-
-    pc->is_drawing = false;
-    pc->state = SP_PENCIL_CONTEXT_IDLE;
-    sp_event_context_discard_delayed_snap_event(SP_EVENT_CONTEXT(pc));
-
-    pc->red_curve->reset();
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
-    while (pc->green_bpaths) {
-        sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
-        pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
-    }
-    pc->green_curve->reset();
-    if (pc->green_anchor) {
-        pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
-    }
-
-    pc->message_context->clear();
-    pc->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
-
-    pc->desktop->canvas->endForcedFullRedraws();
-}
-
-static gint
-pencil_handle_key_press(PencilTool *const pc, guint const keyval, guint const state)
-{
-    gint ret = FALSE;
-    switch (keyval) {
-        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(state)) {
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_Escape:
-            if (pc->npoints != 0) {
-                // if drawing, cancel, otherwise pass it up for deselecting
-                if (pc->state != SP_PENCIL_CONTEXT_IDLE) {
-                    pencil_cancel (pc);
-                    ret = TRUE;
-                }
-            }
-            break;
-        case GDK_KEY_z:
-        case GDK_KEY_Z:
-            if (mod_ctrl_only(state) && pc->npoints != 0) {
-                // if drawing, cancel, otherwise pass it up for undo
-                if (pc->state != SP_PENCIL_CONTEXT_IDLE) {
-                    pencil_cancel (pc);
-                    ret = TRUE;
-                }
-            }
-            break;
-        case GDK_KEY_g:
-        case GDK_KEY_G:
-            if (mod_shift_only(state)) {
-                sp_selection_to_guides(SP_EVENT_CONTEXT(pc)->desktop);
-                ret = true;
-            }
-            break;
-        case GDK_KEY_Alt_L:
-        case GDK_KEY_Alt_R:
-        case GDK_KEY_Meta_L:
-        case GDK_KEY_Meta_R:
-            if (pc->state == SP_PENCIL_CONTEXT_IDLE) {
-                pc->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("<b>Sketch mode</b>: holding <b>Alt</b> interpolates between sketched paths. Release <b>Alt</b> to finalize."));
-            }
-            break;
-        default:
-            break;
-    }
-    return ret;
-}
-
-static gint
-pencil_handle_key_release(PencilTool *const pc, guint const keyval, guint const /*state*/)
-{
-    gint ret = FALSE;
-    switch (keyval) {
-        case GDK_KEY_Alt_L:
-        case GDK_KEY_Alt_R:
-        case GDK_KEY_Meta_L:
-        case GDK_KEY_Meta_R:
-            if (pc->state == SP_PENCIL_CONTEXT_SKETCH) {
-                spdc_concat_colors_and_flush(pc, FALSE);
-                pc->sketch_n = 0;
-                pc->sa = NULL;
-                pc->ea = NULL;
-                if (pc->green_anchor) {
-                    pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
-                }
-                pc->state = SP_PENCIL_CONTEXT_IDLE;
-                sp_event_context_discard_delayed_snap_event(SP_EVENT_CONTEXT(pc));
-                pc->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing freehand sketch"));
-                ret = TRUE;
-            }
-            break;
-        default:
-            break;
-    }
-    return ret;
-}
-
-/**
- * Reset points and set new starting point.
- */
-static void
-spdc_set_startpoint(PencilTool *const pc, Geom::Point const &p)
-{
-    pc->npoints = 0;
-    pc->red_curve_is_valid = false;
-    if (in_svg_plane(p)) {
-        pc->p[pc->npoints++] = p;
-    }
-}
-
-/**
- * Change moving endpoint position.
- * <ul>
- * <li>Ctrl constrains to moving to H/V direction, snapping in given direction.
- * <li>Otherwise we snap freely to whatever attractors are available.
- * </ul>
- *
- * Number of points is (re)set to 2 always, 2nd point is modified.
- * We change RED curve.
- */
-static void
-spdc_set_endpoint(PencilTool *const pc, Geom::Point const &p)
-{
-    if (pc->npoints == 0) {
-        return;
-        /* May occur if first point wasn't in SVG plane (e.g. weird w2d transform, perhaps from bad
-         * zoom setting).
-         */
-    }
-    g_return_if_fail( pc->npoints > 0 );
-
-    pc->red_curve->reset();
-    if ( ( p == pc->p[0] )
-         || !in_svg_plane(p) )
-    {
-        pc->npoints = 1;
-    } else {
-        pc->p[1] = p;
-        pc->npoints = 2;
-
-        pc->red_curve->moveto(pc->p[0]);
-        pc->red_curve->lineto(pc->p[1]);
-        pc->red_curve_is_valid = true;
-
-        sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
-    }
-}
-
-/**
- * Finalize addline.
- *
- * \todo
- * fixme: I'd like remove red reset from concat colors (lauris).
- * Still not sure, how it will make most sense.
- */
-static void
-spdc_finish_endpoint(PencilTool *const pc)
-{
-    if ( ( pc->red_curve->is_empty() )
-         || ( *(pc->red_curve->first_point()) == *(pc->red_curve->second_point())   ) )
-    {
-        pc->red_curve->reset();
-        sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
-    } else {
-        /* Write curves to object. */
-        spdc_concat_colors_and_flush(pc, FALSE);
-        pc->sa = NULL;
-        pc->ea = NULL;
-    }
-}
-
-
-static void
-spdc_add_freehand_point(PencilTool *pc, Geom::Point const &p, guint /*state*/)
-{
-    g_assert( pc->npoints > 0 );
-    g_return_if_fail(unsigned(pc->npoints) < G_N_ELEMENTS(pc->p));
-
-    if ( ( p != pc->p[ pc->npoints - 1 ] )
-         && in_svg_plane(p) )
-    {
-        pc->ps.push_back(p);
-        pc->p[pc->npoints++] = p;
-        fit_and_split(pc);
-    }
-}
-
-static inline double
-square(double const x)
-{
-    return x * x;
-}
-
-static void
-interpolate(PencilTool *pc)
-{
-    if ( pc->ps.size() <= 1 ) {
-        return;
-    }
-
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    double const tol = prefs->getDoubleLimited("/tools/freehand/pencil/tolerance", 10.0, 1.0, 100.0) * 0.4;
-    double const tolerance_sq = 0.02 * square( pc->desktop->w2d().descrim() *
-                                               tol) * exp(0.2*tol - 2);
-
-    g_assert(is_zero(pc->req_tangent)
-             || is_unit_vector(pc->req_tangent));
-    Geom::Point const tHatEnd(0, 0);
-
-    guint n_points  = pc->ps.size();
-    pc->green_curve->reset();
-    pc->red_curve->reset();
-    pc->red_curve_is_valid = false;
-
-    Geom::Point * b = g_new(Geom::Point, 4*n_points);
-    Geom::Point * points = g_new(Geom::Point, 4*n_points);
-    for (unsigned int i = 0; i < pc->ps.size(); i++) {
-        points[i] = pc->ps[i];
-    }
-
-    // worst case gives us a segment per point
-    int max_segs = 4*n_points;
-
-    int const n_segs = Geom::bezier_fit_cubic_r(b, points, n_points,
-                                             tolerance_sq, max_segs);
-
-    if ( n_segs > 0)
-    {
-        /* Fit and draw and reset state */
-        pc->green_curve->moveto(b[0]);
-        for (int c = 0; c < n_segs; c++) {
-            pc->green_curve->curveto(b[4*c+1], b[4*c+2], b[4*c+3]);
-        }
-        sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->green_curve);
-
-        /* Fit and draw and copy last point */
-        g_assert(!pc->green_curve->is_empty());
-
-        /* Set up direction of next curve. */
-        {
-            Geom::Curve const * last_seg = pc->green_curve->last_segment();
-            g_assert( last_seg );      // Relevance: validity of (*last_seg)
-            pc->p[0] = last_seg->finalPoint();
-            pc->npoints = 1;
-            Geom::Curve *last_seg_reverse = last_seg->reverse();
-            Geom::Point const req_vec( -last_seg_reverse->unitTangentAt(0) );
-            delete last_seg_reverse;
-            pc->req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
-                                ? Geom::Point(0, 0)
-                                : Geom::unit_vector(req_vec) );
-        }
-    }
-    g_free(b);
-    g_free(points);
-    pc->ps.clear();
-}
-
-
-/* interpolates the sketched curve and tweaks the current sketch interpolation*/
-static void
-sketch_interpolate(PencilTool *pc)
-{
-    if ( pc->ps.size() <= 1 ) {
-        return;
-    }
-
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    double const tol = prefs->getDoubleLimited("/tools/freehand/pencil/tolerance", 10.0, 1.0, 100.0) * 0.4;
-    double const tolerance_sq = 0.02 * square( pc->desktop->w2d().descrim() *
-                                               tol) * exp(0.2*tol - 2);
-
-    bool average_all_sketches = prefs->getBool("/tools/freehand/pencil/average_all_sketches", true);
-
-    g_assert(is_zero(pc->req_tangent)
-             || is_unit_vector(pc->req_tangent));
-    Geom::Point const tHatEnd(0, 0);
-
-    guint n_points  = pc->ps.size();
-    pc->red_curve->reset();
-    pc->red_curve_is_valid = false;
-
-    Geom::Point * b = g_new(Geom::Point, 4*n_points);
-    Geom::Point * points = g_new(Geom::Point, 4*n_points);
-    for (unsigned i = 0; i < pc->ps.size(); i++) {
-        points[i] = pc->ps[i];
-    }
-
-    // worst case gives us a segment per point
-    int max_segs = 4*n_points;
-
-    int const n_segs = Geom::bezier_fit_cubic_r(b, points, n_points,
-                                             tolerance_sq, max_segs);
-
-    if ( n_segs > 0)
-    {
-        Geom::Path fit(b[0]);
-        for (int c = 0; c < n_segs; c++) {
-            fit.appendNew<Geom::CubicBezier>(b[4*c+1], b[4*c+2], b[4*c+3]);
-        }
-        Geom::Piecewise<Geom::D2<Geom::SBasis> > fit_pwd2 = fit.toPwSb();
-
-        if ( pc->sketch_n > 0 ) {
-            double t =0.;
-            if (average_all_sketches) {
-                // Average = (sum of all) / n
-                //         = (sum of all + new one) / n+1
-                //         = ((old average)*n + new one) / n+1
-                t = pc->sketch_n / (pc->sketch_n + 1.);
-            } else {
-                t = 0.5;
-            }
-            pc->sketch_interpolation = Geom::lerp(t, fit_pwd2, pc->sketch_interpolation);
-            // simplify path, to eliminate small segments
-            Path *path = new Path;
-            path->LoadPathVector(Geom::path_from_piecewise(pc->sketch_interpolation, 0.01));
-            path->Simplify(0.5);
-            Geom::PathVector *pathv = path->MakePathVector();
-            pc->sketch_interpolation = (*pathv)[0].toPwSb();
-            delete path;
-            delete pathv;
-        } else {
-            pc->sketch_interpolation = fit_pwd2;
-        }
-        pc->sketch_n++;
-
-        pc->green_curve->reset();
-        pc->green_curve->set_pathvector(Geom::path_from_piecewise(pc->sketch_interpolation, 0.01));
-        sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->green_curve);
-
-        /* Fit and draw and copy last point */
-        g_assert(!pc->green_curve->is_empty());
-
-        /* Set up direction of next curve. */
-        {
-            Geom::Curve const * last_seg = pc->green_curve->last_segment();
-            g_assert( last_seg );      // Relevance: validity of (*last_seg)
-            pc->p[0] = last_seg->finalPoint();
-            pc->npoints = 1;
-            Geom::Curve *last_seg_reverse = last_seg->reverse();
-            Geom::Point const req_vec( -last_seg_reverse->unitTangentAt(0) );
-            delete last_seg_reverse;
-            pc->req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
-                                ? Geom::Point(0, 0)
-                                : Geom::unit_vector(req_vec) );
-        }
-    }
-    g_free(b);
-    g_free(points);
-    pc->ps.clear();
-}
-
-static void
-fit_and_split(PencilTool *pc)
-{
-    g_assert( pc->npoints > 1 );
-
-    double const tolerance_sq = 0;
-
-    Geom::Point b[4];
-    g_assert(is_zero(pc->req_tangent)
-             || is_unit_vector(pc->req_tangent));
-    Geom::Point const tHatEnd(0, 0);
-    int const n_segs = Geom::bezier_fit_cubic_full(b, NULL, pc->p, pc->npoints,
-                                                pc->req_tangent, tHatEnd,
-                                                tolerance_sq, 1);
-    if ( n_segs > 0
-         && unsigned(pc->npoints) < G_N_ELEMENTS(pc->p) )
-    {
-        /* Fit and draw and reset state */
-        pc->red_curve->reset();
-        pc->red_curve->moveto(b[0]);
-        pc->red_curve->curveto(b[1], b[2], b[3]);
-        sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
-        pc->red_curve_is_valid = true;
-    } else {
-        /* Fit and draw and copy last point */
-
-        g_assert(!pc->red_curve->is_empty());
-
-        /* Set up direction of next curve. */
-        {
-            Geom::Curve const * last_seg = pc->red_curve->last_segment();
-            g_assert( last_seg );      // Relevance: validity of (*last_seg)
-            pc->p[0] = last_seg->finalPoint();
-            pc->npoints = 1;
-            Geom::Curve *last_seg_reverse = last_seg->reverse();
-            Geom::Point const req_vec( -last_seg_reverse->unitTangentAt(0) );
-            delete last_seg_reverse;
-            pc->req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
-                                ? Geom::Point(0, 0)
-                                : Geom::unit_vector(req_vec) );
-        }
-
-
-        pc->green_curve->append_continuous(pc->red_curve, 0.0625);
-        SPCurve *curve = pc->red_curve->copy();
-
-        /// \todo fixme:
-        SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
-        curve->unref();
-        sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
-
-        pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
-
-        pc->red_curve_is_valid = false;
-    }
-}
-
-}
-}
-}
-
-/*
-  Local Variables:
-  mode:c++
-  c-file-style:"stroustrup"
-  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
-  indent-tabs-mode:nil
-  fill-column:99
-  End:
-*/
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :