diff options
Diffstat (limited to 'src/ui/tools/eraser-tool.cpp')
| -rw-r--r-- | src/ui/tools/eraser-tool.cpp | 1119 |
1 files changed, 1119 insertions, 0 deletions
diff --git a/src/ui/tools/eraser-tool.cpp b/src/ui/tools/eraser-tool.cpp new file mode 100644 index 0000000..8a98350 --- /dev/null +++ b/src/ui/tools/eraser-tool.cpp @@ -0,0 +1,1119 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Eraser drawing mode + * + * Authors: + * Mitsuru Oka <oka326@parkcity.ne.jp> + * Lauris Kaplinski <lauris@kaplinski.com> + * 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> + * + * Copyright (C) 1998 The Free Software Foundation + * Copyright (C) 1999-2005 authors + * Copyright (C) 2001-2002 Ximian, Inc. + * Copyright (C) 2005-2007 bulia byak + * Copyright (C) 2006 MenTaLguY + * Copyright (C) 2008 Jon A. Cruz + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#define noERASER_VERBOSE + +#include <string> +#include <cstring> +#include <numeric> + +#include <gtk/gtk.h> +#include <gdk/gdkkeysyms.h> +#include <glibmm/i18n.h> + +#include <2geom/bezier-utils.h> +#include <2geom/pathvector.h> + +#include "context-fns.h" +#include "desktop-events.h" +#include "desktop-style.h" +#include "desktop.h" +#include "document-undo.h" +#include "document.h" +#include "layer-manager.h" +#include "layer-model.h" +#include "message-context.h" +#include "path-chemistry.h" +#include "rubberband.h" +#include "selection-chemistry.h" +#include "selection.h" +#include "splivarot.h" +#include "verbs.h" + +#include "display/sp-canvas.h" +#include "display/canvas-arena.h" +#include "display/canvas-bpath.h" +#include "display/curve.h" + +#include "include/macros.h" + +#include "object/sp-clippath.h" +#include "object/sp-item-group.h" +#include "object/sp-path.h" +#include "object/sp-rect.h" +#include "object/sp-root.h" +#include "object/sp-shape.h" +#include "object/sp-text.h" +#include "object/sp-use.h" +#include "style.h" + +#include "ui/pixmaps/cursor-eraser.xpm" + +#include "svg/svg.h" + +#include "ui/tools/eraser-tool.h" + +using Inkscape::DocumentUndo; + +#define ERC_RED_RGBA 0xff0000ff + +#define TOLERANCE_ERASER 0.1 + +#define ERASER_EPSILON 0.5e-6 +#define ERASER_EPSILON_START 0.5e-2 +#define ERASER_VEL_START 1e-5 + +#define DRAG_MIN 0.0 +#define DRAG_DEFAULT 1.0 +#define DRAG_MAX 1.0 + +namespace Inkscape { +namespace UI { +namespace Tools { + +const std::string& EraserTool::getPrefsPath() { + return EraserTool::prefsPath; +} + +const std::string EraserTool::prefsPath = "/tools/eraser"; + +EraserTool::EraserTool() + : DynamicBase(cursor_eraser_xpm) + , nowidth(false) +{ +} + +EraserTool::~EraserTool() = default; + +void EraserTool::setup() { + DynamicBase::setup(); + + this->accumulated = new SPCurve(); + this->currentcurve = new SPCurve(); + + this->cal1 = new SPCurve(); + this->cal2 = new SPCurve(); + + this->currentshape = sp_canvas_item_new(desktop->getSketch(), SP_TYPE_CANVAS_BPATH, nullptr); + + sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(this->currentshape), ERC_RED_RGBA, SP_WIND_RULE_EVENODD); + sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(this->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(this->currentshape), "event", G_CALLBACK(sp_desktop_root_handler), desktop); + +/* +static ProfileFloatElement f_profile[PROFILE_FLOAT_SIZE] = { + {"mass",0.02, 0.0, 1.0}, + {"wiggle",0.0, 0.0, 1.0}, + {"angle",30.0, -90.0, 90.0}, + {"thinning",0.1, -1.0, 1.0}, + {"tremor",0.0, 0.0, 1.0}, + {"flatness",0.9, 0.0, 1.0}, + {"cap_rounding",0.0, 0.0, 5.0} +}; +*/ + + sp_event_context_read(this, "mass"); + sp_event_context_read(this, "wiggle"); + sp_event_context_read(this, "angle"); + sp_event_context_read(this, "width"); + sp_event_context_read(this, "thinning"); + sp_event_context_read(this, "tremor"); + sp_event_context_read(this, "flatness"); + sp_event_context_read(this, "tracebackground"); + sp_event_context_read(this, "usepressure"); + sp_event_context_read(this, "usetilt"); + sp_event_context_read(this, "abs_width"); + sp_event_context_read(this, "cap_rounding"); + + this->is_drawing = false; + //TODO not sure why get 0.01 if slider width == 0, maybe a double/int problem + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + if (prefs->getBool("/tools/eraser/selcue", false) != 0) { + this->enableSelectionCue(); + } + + // TODO temp force: + this->enableSelectionCue(); +} + +static double +flerp(double f0, double f1, double p) +{ + return f0 + ( f1 - f0 ) * p; +} + +void EraserTool::reset(Geom::Point p) { + this->last = this->cur = getNormalizedPoint(p); + this->vel = Geom::Point(0,0); + this->vel_max = 0; + this->acc = Geom::Point(0,0); + this->ang = Geom::Point(0,0); + this->del = Geom::Point(0,0); +} + +void EraserTool::extinput(GdkEvent *event) { + if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &this->pressure)) + this->pressure = CLAMP (this->pressure, ERC_MIN_PRESSURE, ERC_MAX_PRESSURE); + else + this->pressure = ERC_DEFAULT_PRESSURE; + + if (gdk_event_get_axis (event, GDK_AXIS_XTILT, &this->xtilt)) + this->xtilt = CLAMP (this->xtilt, ERC_MIN_TILT, ERC_MAX_TILT); + else + this->xtilt = ERC_DEFAULT_TILT; + + if (gdk_event_get_axis (event, GDK_AXIS_YTILT, &this->ytilt)) + this->ytilt = CLAMP (this->ytilt, ERC_MIN_TILT, ERC_MAX_TILT); + else + this->ytilt = ERC_DEFAULT_TILT; +} + + +bool EraserTool::apply(Geom::Point p) { + Geom::Point n = getNormalizedPoint(p); + + /* Calculate mass and drag */ + double const mass = flerp(1.0, 160.0, this->mass); + double const drag = flerp(0.0, 0.5, this->drag * this->drag); + + /* Calculate force and acceleration */ + Geom::Point force = n - this->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) + // _and_ the force is below the (higher) ERASER_EPSILON_START threshold, + // discard this move. + // 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 ( Geom::L2(force) < ERASER_EPSILON || (this->vel_max < ERASER_VEL_START && Geom::L2(force) < ERASER_EPSILON_START)) { + return FALSE; + } + + this->acc = force / mass; + + /* Calculate new velocity */ + this->vel += this->acc; + + if (Geom::L2(this->vel) > this->vel_max) + this->vel_max = Geom::L2(this->vel); + + /* Calculate angle of drawing tool */ + + double a1; + if (this->usetilt) { + // 1a. calculate nib angle from input device tilt: + gdouble length = std::sqrt(this->xtilt*this->xtilt + this->ytilt*this->ytilt);; + + if (length > 0) { + Geom::Point ang1 = Geom::Point(this->ytilt/length, this->xtilt/length); + a1 = atan2(ang1); + } + else + a1 = 0.0; + } + else { + // 1b. fixed dc->angle (absolutely flat nib): + double const radians = ( (this->angle - 90) / 180.0 ) * M_PI; + 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 = Geom::L2(this->vel); + if ( mag_vel < ERASER_EPSILON ) { + return FALSE; + } + Geom::Point ang2 = Geom::rot90(this->vel) / mag_vel; + + // 3. Average them using flatness parameter: + // calculate angles + double a2 = atan2(ang2); + // flip a2 to force it to be in the same half-circle as a1 + bool flipped = false; + if (fabs (a2-a1) > 0.5*M_PI) { + a2 += M_PI; + flipped = true; + } + // normalize a2 + if (a2 > M_PI) + a2 -= 2*M_PI; + if (a2 < -M_PI) + a2 += 2*M_PI; + // find the flatness-weighted bisector angle, unflip if a2 was flipped + // FIXME: when dc->vel is oscillating around the fixed angle, the new_ang flips back and forth. How to avoid this? + double new_ang = a1 + (1 - this->flatness) * (a2 - a1) - (flipped? M_PI : 0); + + // 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 = Geom::L2(Geom::Point (cos (new_ang), sin (new_ang)) - this->ang); + if ( angle_delta / Geom::L2(this->vel) > 4000 ) { + return FALSE; + } + + // convert to point + this->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", Geom::L2(force), Geom::L2(dc->acc), dc->vel_max, Geom::L2(dc->vel), a1, a2, new_ang); + + /* Apply drag */ + this->vel *= 1.0 - drag; + + /* Update position */ + this->last = this->cur; + this->cur += this->vel; + + return TRUE; +} + +void EraserTool::brush() { + g_assert( this->npoints >= 0 && this->npoints < SAMPLING_SIZE ); + + // How much velocity thins strokestyle + double vel_thin = flerp (0, 160, this->vel_thin); + + // Influence of pressure on thickness + double pressure_thick = (this->usepressure ? this->pressure : 1.0); + + // get the real brush point, not the same as pointer (affected by hatch tracking and/or mass + // drag) + Geom::Point brush = getViewPoint(this->cur); + //Geom::Point brush_w = SP_EVENT_CONTEXT(dc)->desktop->d2w(brush); + + double trace_thick = 1; + + double width = (pressure_thick * trace_thick - vel_thin * Geom::L2(this->vel)) * this->width; + + double tremble_left = 0, tremble_right = 0; + if (this->tremor > 0) { + // obtain two normally distributed random variables, using polar Box-Muller transform + double x1, x2, w, y1, y2; + do { + x1 = 2.0 * g_random_double_range(0,1) - 1.0; + x2 = 2.0 * g_random_double_range(0,1) - 1.0; + w = x1 * x1 + x2 * x2; + } while ( w >= 1.0 ); + w = sqrt( (-2.0 * log( w ) ) / w ); + y1 = x1 * w; + y2 = x2 * w; + + // deflect both left and right edges randomly and independently, so that: + // (1) dc->tremor=1 corresponds to sigma=1, decreasing dc->tremor narrows the bell curve; + // (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)*this->tremor * (0.15 + 0.8*width) * (0.35 + 14*Geom::L2(this->vel)); + tremble_right = (y2)*this->tremor * (0.15 + 0.8*width) * (0.35 + 14*Geom::L2(this->vel)); + } + + if ( width < 0.02 * this->width ) { + width = 0.02 * this->width; + } + + double dezoomify_factor = 0.05 * 1000; + if (!this->abs_width) { + dezoomify_factor /= SP_EVENT_CONTEXT(this)->desktop->current_zoom(); + } + + Geom::Point del_left = dezoomify_factor * (width + tremble_left) * this->ang; + Geom::Point del_right = dezoomify_factor * (width + tremble_right) * this->ang; + + this->point1[this->npoints] = brush + del_left; + this->point2[this->npoints] = brush - del_right; + + if (this->nowidth) { + this->point1[this->npoints] = Geom::middle_point(this->point1[this->npoints],this->point2[this->npoints]); + } + this->del = 0.5*(del_left + del_right); + + this->npoints++; +} + +static void +sp_erc_update_toolbox (SPDesktop *desktop, const gchar *id, double value) +{ + desktop->setToolboxAdjustmentValue (id, value); +} + +void EraserTool::cancel() { + SPDesktop *desktop = SP_EVENT_CONTEXT(this)->desktop; + this->dragging = FALSE; + this->is_drawing = false; + sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate)); + /* Remove all temporary line segments */ + for (auto i : this->segments) + sp_canvas_item_destroy(SP_CANVAS_ITEM(i)); + this->segments.clear(); + /* reset accumulated curve */ + this->accumulated->reset(); + this->clear_current(); + if (this->repr) { + this->repr = nullptr; + } +} + +bool EraserTool::root_handler(GdkEvent* event) { + gint ret = FALSE; + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + gint eraser_mode = prefs->getInt("/tools/eraser/mode", 2); + switch (event->type) { + case GDK_BUTTON_PRESS: + if (event->button.button == 1 && !this->space_panning) { + if (Inkscape::have_viable_layer(desktop, defaultMessageContext()) == false) { + return TRUE; + } + + Geom::Point const button_w(event->button.x, event->button.y); + Geom::Point const button_dt(desktop->w2d(button_w)); + + this->reset(button_dt); + this->extinput(event); + this->apply(button_dt); + + this->accumulated->reset(); + + if (this->repr) { + this->repr = nullptr; + } + if ( eraser_mode == ERASER_MODE_DELETE ) { + Inkscape::Rubberband::get(desktop)->start(desktop, button_dt); + Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH); + } + /* initialize first point */ + this->npoints = 0; + + sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate), + ( GDK_KEY_PRESS_MASK | + GDK_BUTTON_RELEASE_MASK | + GDK_POINTER_MOTION_MASK | + GDK_BUTTON_PRESS_MASK ), + nullptr, + event->button.time); + + ret = TRUE; + + desktop->canvas->forceFullRedrawAfterInterruptions(3); + this->is_drawing = true; + } + break; + + case GDK_MOTION_NOTIFY: { + Geom::Point const motion_w(event->motion.x, event->motion.y); + Geom::Point motion_dt(desktop->w2d(motion_w) + ); + this->extinput(event); + + this->message_context->clear(); + + if ( this->is_drawing && (event->motion.state & GDK_BUTTON1_MASK) && !this->space_panning) { + this->dragging = TRUE; + + this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Drawing</b> an eraser stroke")); + + if (!this->apply(motion_dt)) { + ret = TRUE; + break; + } + + if ( this->cur != this->last ) { + this->brush(); + g_assert( this->npoints > 0 ); + this->fit_and_split(false); + } + + ret = TRUE; + } + if ( eraser_mode == ERASER_MODE_DELETE ) { + this->accumulated->reset(); + Inkscape::Rubberband::get(desktop)->move(motion_dt); + } + } + break; + + case GDK_BUTTON_RELEASE: { + 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)); + desktop->canvas->endForcedFullRedraws(); + this->is_drawing = false; + + if (this->dragging && event->button.button == 1 && !this->space_panning) { + this->dragging = FALSE; + + this->apply(motion_dt); + + /* Remove all temporary line segments */ + for (auto i : this->segments) + sp_canvas_item_destroy(SP_CANVAS_ITEM(i)); + this->segments.clear(); + + /* Create object */ + this->fit_and_split(true); + this->accumulate(); + this->set_to_accumulated(); // performs document_done + + /* reset accumulated curve */ + this->accumulated->reset(); + + this->clear_current(); + if (this->repr) { + this->repr = nullptr; + } + + this->message_context->clear(); + ret = TRUE; + } + + if (eraser_mode == ERASER_MODE_DELETE && Inkscape::Rubberband::get(desktop)->is_started()) { + Inkscape::Rubberband::get(desktop)->stop(); + } + + break; + } + + case GDK_KEY_PRESS: + switch (get_latin_keyval (&event->key)) { +// case GDK_KEY_Up: +// case GDK_KEY_KP_Up: +// if (!MOD__CTRL_ONLY(event)) { +// this->angle += 5.0; + +// if (this->angle > 90.0) { +// this->angle = 90.0; +// } +// sp_erc_update_toolbox (desktop, "eraser-angle", this->angle); +// ret = TRUE; +// } +// break; + +// case GDK_KEY_Down: +// case GDK_KEY_KP_Down: +// if (!MOD__CTRL_ONLY(event)) { +// this->angle -= 5.0; + +// if (this->angle < -90.0) { +// this->angle = -90.0; +// } + +// sp_erc_update_toolbox (desktop, "eraser-angle", this->angle); +// ret = TRUE; +// } +// break; + + case GDK_KEY_Right: + case GDK_KEY_KP_Right: + if (!MOD__CTRL_ONLY(event)) { + this->width += 0.01; + + if (this->width > 1.0) { + this->width = 1.0; + } + + sp_erc_update_toolbox (desktop, "eraser-width", this->width * 100); // the same spinbutton is for alt+x + ret = TRUE; + } + break; + + case GDK_KEY_Left: + case GDK_KEY_KP_Left: + if (!MOD__CTRL_ONLY(event)) { + this->width -= 0.01; + + if (this->width < 0.01) { + this->width = 0.01; + } + + sp_erc_update_toolbox (desktop, "eraser-width", this->width * 100); + ret = TRUE; + } + break; + + case GDK_KEY_Home: + case GDK_KEY_KP_Home: + this->width = 0.01; + sp_erc_update_toolbox (desktop, "eraser-width", this->width * 100); + ret = TRUE; + break; + + case GDK_KEY_End: + case GDK_KEY_KP_End: + this->width = 1.0; + sp_erc_update_toolbox (desktop, "eraser-width", this->width * 100); + ret = TRUE; + break; + + case GDK_KEY_x: + case GDK_KEY_X: + if (MOD__ALT_ONLY(event)) { + desktop->setToolboxFocusTo ("eraser-width"); + ret = TRUE; + } + break; + + case GDK_KEY_Escape: + if ( eraser_mode == ERASER_MODE_DELETE ) { + Inkscape::Rubberband::get(desktop)->stop(); + } + if (this->is_drawing) { + // if drawing, cancel, otherwise pass it up for deselecting + this->cancel(); + ret = TRUE; + } + break; + + case GDK_KEY_z: + case GDK_KEY_Z: + if (MOD__CTRL_ONLY(event) && this->is_drawing) { + // if drawing, cancel, otherwise pass it up for undo + this->cancel(); + ret = TRUE; + } + break; + + default: + break; + } + break; + + case GDK_KEY_RELEASE: + switch (get_latin_keyval(&event->key)) { + case GDK_KEY_Control_L: + case GDK_KEY_Control_R: + this->message_context->clear(); + break; + + default: + break; + } + break; + + default: + break; + } + + if (!ret) { + ret = DynamicBase::root_handler(event); + } + + return ret; +} + +void EraserTool::clear_current() { + // reset bpath + sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->currentshape), nullptr); + + // reset curve + this->currentcurve->reset(); + this->cal1->reset(); + this->cal2->reset(); + + // reset points + this->npoints = 0; +} + +void EraserTool::set_to_accumulated() { + bool workDone = false; + SPDocument *document = this->desktop->doc(); + if (!this->accumulated->is_empty()) { + if (!this->repr) { + /* Create object */ + Inkscape::XML::Document *xml_doc = this->desktop->doc()->getReprDoc(); + Inkscape::XML::Node *repr = xml_doc->createElement("svg:path"); + + /* Set style */ + sp_desktop_apply_style_tool (this->desktop, repr, "/tools/eraser", false); + + this->repr = repr; + } + SPObject * top_layer = desktop->currentRoot(); + SPItem *item_repr = SP_ITEM(top_layer->appendChildRepr(this->repr)); + Inkscape::GC::release(this->repr); + item_repr->updateRepr(); + Geom::PathVector pathv = this->accumulated->get_pathvector() * this->desktop->dt2doc(); + pathv *= item_repr->i2doc_affine().inverse(); + gchar *str = sp_svg_write_path(pathv); + g_assert( str != nullptr ); + this->repr->setAttribute("d", str); + g_free(str); + Geom::OptRect eraserBbox; + if ( this->repr ) { + bool wasSelection = false; + Inkscape::Selection *selection = this->desktop->getSelection(); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + gint eraser_mode = prefs->getInt("/tools/eraser/mode", ERASER_MODE_CLIP); + Inkscape::XML::Document *xml_doc = this->desktop->doc()->getReprDoc(); + + SPItem* acid = SP_ITEM(this->desktop->doc()->getObjectByRepr(this->repr)); + eraserBbox = acid->documentVisualBounds(); + std::vector<SPItem*> remainingItems; + std::vector<SPItem*> toWorkOn; + if (selection->isEmpty()) { + if (eraser_mode == ERASER_MODE_CUT || eraser_mode == ERASER_MODE_CLIP) { + toWorkOn = document->getItemsPartiallyInBox(this->desktop->dkey, *eraserBbox, false, false, false, true); + } else { + Inkscape::Rubberband *r = Inkscape::Rubberband::get(this->desktop); + toWorkOn = document->getItemsAtPoints(this->desktop->dkey, r->getPoints()); + } + toWorkOn.erase(std::remove(toWorkOn.begin(), toWorkOn.end(), acid), toWorkOn.end()); + } else { + if (eraser_mode == ERASER_MODE_DELETE) { + Inkscape::Rubberband *r = Inkscape::Rubberband::get(this->desktop); + std::vector<SPItem*> touched; + touched = document->getItemsAtPoints(this->desktop->dkey, r->getPoints()); + for (auto i : touched) { + if(selection->includes(i)){ + toWorkOn.push_back(i); + } + } + } else { + toWorkOn.insert(toWorkOn.end(), selection->items().begin(), selection->items().end()); + } + wasSelection = true; + } + + if ( !toWorkOn.empty() ) { + if (eraser_mode == ERASER_MODE_CUT) { + for (auto i : toWorkOn){ + SPItem *item = i; + SPUse *use = dynamic_cast<SPUse *>(item); + if (SP_IS_PATH(item) && SP_PATH(item)->nodesInPath () == 2){ + SPItem *item = i; + item->deleteObject(true); + workDone = true; + } else if (SP_IS_GROUP(item) || use ) { + /*Do nothing*/ + } else { + Geom::OptRect bbox = item->documentVisualBounds(); + if (bbox && bbox->intersects(*eraserBbox)) { + Inkscape::XML::Node* dup = this->repr->duplicate(xml_doc); + this->repr->parent()->appendChild(dup); + Inkscape::GC::release(dup); // parent takes over + Inkscape::ObjectSet w_selection(this->desktop); + w_selection.set(dup); + if (!this->nowidth) { + w_selection.pathUnion(true); + } + w_selection.add(item); + if(item->style->fill_rule.value == SP_WIND_RULE_EVENODD){ + SPCSSAttr *css = sp_repr_css_attr_new(); + sp_repr_css_set_property(css, "fill-rule", "evenodd"); + sp_desktop_set_style(this->desktop, css); + sp_repr_css_attr_unref(css); + css = nullptr; + } + if (this->nowidth) { + w_selection.pathCut(true); + } else { + w_selection.pathDiff(true); + } + workDone = true; // TODO set this only if something was cut. + bool break_apart = prefs->getBool("/tools/eraser/break_apart", false); + if(!break_apart){ + w_selection.combine(true); + } else { + if(!this->nowidth){ + w_selection.breakApart(true); + } + } + if ( !w_selection.isEmpty() ) { + // If the item was not completely erased, track the new remainder. + std::vector<SPItem*> nowSel(w_selection.items().begin(), w_selection.items().end()); + for (auto i2 : nowSel) { + remainingItems.push_back(i2); + } + } + } else { + remainingItems.push_back(item); + } + } + } + } else if (eraser_mode == ERASER_MODE_CLIP) { + if (!this->nowidth) { + remainingItems.clear(); + for (auto item : toWorkOn){ + Inkscape::ObjectSet w_selection(this->desktop); + Geom::OptRect bbox = item->documentVisualBounds(); + Inkscape::XML::Document *xml_doc = this->desktop->doc()->getReprDoc(); + Inkscape::XML::Node* dup = this->repr->duplicate(xml_doc); + this->repr->parent()->appendChild(dup); + Inkscape::GC::release(dup); // parent takes over + w_selection.set(dup); + w_selection.pathUnion(true); + if (bbox && bbox->intersects(*eraserBbox)) { + SPClipPath *clip_path = item->getClipObject(); + if (clip_path) { + std::vector<SPItem*> selected; + selected.push_back(SP_ITEM(clip_path->firstChild())); + std::vector<Inkscape::XML::Node*> to_select; + std::vector<SPItem*> items(selected); + sp_item_list_to_curves(items, selected, to_select); + Inkscape::XML::Node * clip_data = SP_ITEM(clip_path->firstChild())->getRepr(); + if (!clip_data && !to_select.empty()) { + clip_data = *(to_select.begin()); + } + if (clip_data) { + Inkscape::XML::Node *dup_clip = clip_data->duplicate(xml_doc); + if (dup_clip) { + SPItem * dup_clip_obj = SP_ITEM(item_repr->parent->appendChildRepr(dup_clip)); + Inkscape::GC::release(dup_clip); + if (dup_clip_obj) { + dup_clip_obj->transform *= + item->getRelativeTransform(SP_ITEM(item_repr->parent)); + dup_clip_obj->updateRepr(); + clip_path->deleteObject(true); + w_selection.raiseToTop(true); + w_selection.add(dup_clip); + w_selection.pathDiff(true); + //SPItem * clip = SP_ITEM(*(w_selection.items().begin())); + } + } + } + } else { + Inkscape::XML::Node *rect_repr = xml_doc->createElement("svg:rect"); + sp_desktop_apply_style_tool (this->desktop, rect_repr, "/tools/eraser", false); + SPRect * rect = SP_RECT(item_repr->parent->appendChildRepr(rect_repr)); + Inkscape::GC::release(rect_repr); + rect->setPosition (bbox->left(), bbox->top(), bbox->width(), bbox->height()); + rect->transform = SP_ITEM(rect->parent)->i2doc_affine().inverse(); + + rect->updateRepr(); + rect->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); + w_selection.raiseToTop(true); + w_selection.add(rect); + w_selection.pathDiff(true); + } + w_selection.raiseToTop(true); + w_selection.add(item); + w_selection.setMask(true, false, true); + } else { + SPItem *erase_clip = w_selection.singleItem(); + if (erase_clip) { + erase_clip->deleteObject(true); + } + } + workDone = true; + if (wasSelection) { + remainingItems.push_back(item); + } + } + } + } else { + for (auto item : toWorkOn) { + item->deleteObject(true); + workDone = true; + } + } + + if (eraser_mode == ERASER_MODE_DELETE) { + selection->deleteItems(); + remainingItems.clear(); + } + + selection->clear(); + if ( wasSelection ) { + if ( !remainingItems.empty() ) { + selection->add(remainingItems.begin(), remainingItems.end()); + } + } + } + // Remove the eraser stroke itself: + sp_repr_unparent( this->repr ); + this->repr = nullptr; + } + } else { + if (this->repr) { + sp_repr_unparent(this->repr); + this->repr = nullptr; + } + } + if ( workDone ) { + DocumentUndo::done(document, SP_VERB_CONTEXT_ERASER, _("Draw eraser stroke")); + } else { + DocumentUndo::cancel(document); + } +} + +static void +add_cap(SPCurve *curve, + Geom::Point const &pre, Geom::Point const &from, + Geom::Point const &to, Geom::Point const &post, + double rounding) +{ + Geom::Point vel = rounding * Geom::rot90( to - from ) / sqrt(2.0); + double mag = Geom::L2(vel); + + 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 = Geom::Point(0, 0); + } + + 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 = Geom::Point(0, 0); + } + + if ( Geom::L2(v_in) > ERASER_EPSILON || Geom::L2(v_out) > ERASER_EPSILON ) { + curve->curveto(from + v_in, to + v_out, to); + } +} + +void EraserTool::accumulate() { + // construct a crude outline of the eraser's path. + // this desperately needs to be rewritten to use the path outliner... + if ( !this->cal1->is_empty() && !this->cal2->is_empty() ) { + this->accumulated->reset(); /* Is this required ?? */ + SPCurve *rev_cal2 = this->cal2->create_reverse(); + + g_assert(this->cal1->get_segment_count() > 0); + g_assert(rev_cal2->get_segment_count() > 0); + g_assert( ! this->cal1->first_path()->closed() ); + g_assert( ! rev_cal2->first_path()->closed() ); + + Geom::BezierCurve const * dc_cal1_firstseg = dynamic_cast<Geom::BezierCurve const *>( this->cal1->first_segment() ); + Geom::BezierCurve const * rev_cal2_firstseg = dynamic_cast<Geom::BezierCurve const *>( rev_cal2->first_segment() ); + Geom::BezierCurve const * dc_cal1_lastseg = dynamic_cast<Geom::BezierCurve const *>( this->cal1->last_segment() ); + Geom::BezierCurve const * rev_cal2_lastseg = dynamic_cast<Geom::BezierCurve 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 ); + + this->accumulated->append(this->cal1, FALSE); + if(!this->nowidth) { + add_cap(this->accumulated, + dc_cal1_lastseg->finalPoint() - dc_cal1_lastseg->unitTangentAt(1), + dc_cal1_lastseg->finalPoint(), + rev_cal2_firstseg->initialPoint(), + rev_cal2_firstseg->initialPoint() + rev_cal2_firstseg->unitTangentAt(0), + this->cap_rounding); + + this->accumulated->append(rev_cal2, TRUE); + + add_cap(this->accumulated, + rev_cal2_lastseg->finalPoint() - rev_cal2_lastseg->unitTangentAt(1), + rev_cal2_lastseg->finalPoint(), + dc_cal1_firstseg->initialPoint(), + dc_cal1_firstseg->initialPoint() + dc_cal1_firstseg->unitTangentAt(0), + this->cap_rounding); + + this->accumulated->closepath(); + } + + rev_cal2->unref(); + + this->cal1->reset(); + this->cal2->reset(); + } +} + +static double square(double const x) +{ + return x * x; +} + +void EraserTool::fit_and_split(bool release) { + double const tolerance_sq = square( desktop->w2d().descrim() * TOLERANCE_ERASER ); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + this->nowidth = prefs->getDouble( "/tools/eraser/width", 1) == 0; + +#ifdef ERASER_VERBOSE + g_print("[F&S:R=%c]", release?'T':'F'); +#endif + + if (!( this->npoints > 0 && this->npoints < SAMPLING_SIZE )) + return; // just clicked + + if ( this->npoints == SAMPLING_SIZE - 1 || release ) { +#define BEZIER_SIZE 4 +#define BEZIER_MAX_BEZIERS 8 +#define BEZIER_MAX_LENGTH ( BEZIER_SIZE * BEZIER_MAX_BEZIERS ) + +#ifdef ERASER_VERBOSE + g_print("[F&S:#] this->npoints:%d, release:%s\n", + dc->npoints, release ? "TRUE" : "FALSE"); +#endif + + /* Current eraser */ + if ( this->cal1->is_empty() || this->cal2->is_empty() ) { + /* dc->npoints > 0 */ + /* g_print("erasers(1|2) reset\n"); */ + this->cal1->reset(); + this->cal2->reset(); + + this->cal1->moveto(this->point1[0]); + this->cal2->moveto(this->point2[0]); + } + + Geom::Point b1[BEZIER_MAX_LENGTH]; + gint const nb1 = Geom::bezier_fit_cubic_r(b1, this->point1, this->npoints, tolerance_sq, BEZIER_MAX_BEZIERS); + g_assert( nb1 * BEZIER_SIZE <= gint(G_N_ELEMENTS(b1)) ); + + Geom::Point b2[BEZIER_MAX_LENGTH]; + gint const nb2 = Geom::bezier_fit_cubic_r(b2, this->point2, this->npoints, tolerance_sq, BEZIER_MAX_BEZIERS); + g_assert( nb2 * BEZIER_SIZE <= gint(G_N_ELEMENTS(b2)) ); + + if ( nb1 != -1 && nb2 != -1 ) { + /* Fit and draw and reset state */ +#ifdef ERASER_VERBOSE + g_print("nb1:%d nb2:%d\n", nb1, nb2); +#endif + + /* CanvasShape */ + if (! release) { + this->currentcurve->reset(); + this->currentcurve->moveto(b1[0]); + + for (Geom::Point *bp1 = b1; bp1 < b1 + BEZIER_SIZE * nb1; bp1 += BEZIER_SIZE) { + this->currentcurve->curveto(bp1[1], bp1[2], bp1[3]); + } + + this->currentcurve->lineto(b2[BEZIER_SIZE*(nb2-1) + 3]); + + for (Geom::Point *bp2 = b2 + BEZIER_SIZE * ( nb2 - 1 ); bp2 >= b2; bp2 -= BEZIER_SIZE) { + this->currentcurve->curveto(bp2[2], bp2[1], bp2[0]); + } + + // FIXME: this->segments is always NULL at this point?? + if (this->segments.empty()) { // first segment + add_cap(this->currentcurve, b2[1], b2[0], b1[0], b1[1], this->cap_rounding); + } + + this->currentcurve->closepath(); + sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->currentshape), this->currentcurve, true); + } + + /* Current eraser */ + for (Geom::Point *bp1 = b1; bp1 < b1 + BEZIER_SIZE * nb1; bp1 += BEZIER_SIZE) { + this->cal1->curveto(bp1[1], bp1[2], bp1[3]); + } + + for (Geom::Point *bp2 = b2; bp2 < b2 + BEZIER_SIZE * nb2; bp2 += BEZIER_SIZE) { + this->cal2->curveto(bp2[1], bp2[2], bp2[3]); + } + } else { + /* fixme: ??? */ +#ifdef ERASER_VERBOSE + g_print("[fit_and_split] failed to fit-cubic.\n"); +#endif + this->draw_temporary_box(); + + for (gint i = 1; i < this->npoints; i++) { + this->cal1->lineto(this->point1[i]); + } + + for (gint i = 1; i < this->npoints; i++) { + this->cal2->lineto(this->point2[i]); + } + } + + /* Fit and draw and copy last point */ +#ifdef ERASER_VERBOSE + g_print("[%d]Yup\n", this->npoints); +#endif + if (!release) { + gint eraser_mode = prefs->getInt("/tools/eraser/mode",2); + g_assert(!this->currentcurve->is_empty()); + + SPCanvasItem *cbp = sp_canvas_item_new(desktop->getSketch(), SP_TYPE_CANVAS_BPATH, nullptr); + SPCurve *curve = this->currentcurve->copy(); + sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH (cbp), curve, true); + curve->unref(); + + 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), desktop); + + this->segments.push_back(cbp); + + if (eraser_mode == ERASER_MODE_DELETE) { + sp_canvas_item_hide(cbp); + sp_canvas_item_hide(this->currentshape); + } + } + + this->point1[0] = this->point1[this->npoints - 1]; + this->point2[0] = this->point2[this->npoints - 1]; + this->npoints = 1; + } else { + this->draw_temporary_box(); + } +} + +void EraserTool::draw_temporary_box() { + this->currentcurve->reset(); + + this->currentcurve->moveto(this->point1[this->npoints-1]); + + for (gint i = this->npoints-2; i >= 0; i--) { + this->currentcurve->lineto(this->point1[i]); + } + + for (gint i = 0; i < this->npoints; i++) { + this->currentcurve->lineto(this->point2[i]); + } + + if (this->npoints >= 2) { + add_cap(this->currentcurve, this->point2[this->npoints-2], this->point2[this->npoints-1], this->point1[this->npoints-1], this->point1[this->npoints-2], this->cap_rounding); + } + + this->currentcurve->closepath(); + sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->currentshape), this->currentcurve, true); +} + +} +} +} + +/* + 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 : |