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Diffstat (limited to 'src/ui/tools/freehand-base.cpp')
| -rw-r--r-- | src/ui/tools/freehand-base.cpp | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/src/ui/tools/freehand-base.cpp b/src/ui/tools/freehand-base.cpp new file mode 100644 index 0000000..8b5b56c --- /dev/null +++ b/src/ui/tools/freehand-base.cpp @@ -0,0 +1,1077 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Generic drawing context + * + * Author: + * Lauris Kaplinski <lauris@kaplinski.com> + * Abhishek Sharma + * Jon A. Cruz <jon@joncruz.org> + * + * Copyright (C) 2000 Lauris Kaplinski + * Copyright (C) 2000-2001 Ximian, Inc. + * Copyright (C) 2002 Lauris Kaplinski + * Copyright (C) 2012 Johan Engelen + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#define DRAW_VERBOSE + +#include "freehand-base.h" + +#include "desktop-style.h" +#include "id-clash.h" +#include "message-stack.h" +#include "selection-chemistry.h" +#include "style.h" + +#include "display/curve.h" +#include "display/control/canvas-item-bpath.h" + +#include "include/macros.h" + +#include "live_effects/lpe-bendpath.h" +#include "live_effects/lpe-patternalongpath.h" +#include "live_effects/lpe-simplify.h" +#include "live_effects/lpe-powerstroke.h" + +#include "object/sp-item-group.h" +#include "object/sp-path.h" +#include "object/sp-rect.h" +#include "object/sp-use.h" + +#include "svg/svg-color.h" +#include "svg/svg.h" + +#include "ui/clipboard.h" +#include "ui/draw-anchor.h" +#include "ui/icon-names.h" +#include "ui/tools/lpe-tool.h" +#include "ui/tools/pen-tool.h" +#include "ui/tools/pencil-tool.h" + +#define MIN_PRESSURE 0.0 +#define MAX_PRESSURE 1.0 +#define DEFAULT_PRESSURE 1.0 + +using Inkscape::DocumentUndo; + +namespace Inkscape { +namespace UI { +namespace Tools { + +static void spdc_selection_changed(Inkscape::Selection *sel, FreehandBase *dc); +static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, FreehandBase *dc); + +static void spdc_attach_selection(FreehandBase *dc, Inkscape::Selection *sel); + +/** + * Flushes white curve(s) and additional curve into object. + * + * No cleaning of colored curves - this has to be done by caller + * No rereading of white data, so if you cannot rely on ::modified, do it in caller + */ +static void spdc_flush_white(FreehandBase *dc, SPCurve *gc); + +static void spdc_reset_white(FreehandBase *dc); +static void spdc_free_colors(FreehandBase *dc); + +FreehandBase::FreehandBase(SPDesktop *desktop, std::string prefs_path, const std::string &cursor_filename) + : ToolBase(desktop, prefs_path, cursor_filename) + , selection(nullptr) + , attach(false) + , red_color(0xff00007f) + , blue_color(0x0000ff7f) + , green_color(0x00ff007f) + , highlight_color(0x0000007f) + , red_bpath(nullptr) + , red_curve(nullptr) + , blue_bpath(nullptr) + , blue_curve(nullptr) + , green_curve(nullptr) + , green_anchor(nullptr) + , green_closed(false) + , white_item(nullptr) + , sa_overwrited(nullptr) + , sa(nullptr) + , ea(nullptr) + , waiting_LPE_type(Inkscape::LivePathEffect::INVALID_LPE) + , red_curve_is_valid(false) + , anchor_statusbar(false) + , tablet_enabled(false) + , is_tablet(false) + , pressure(DEFAULT_PRESSURE) +{ + this->selection = desktop->getSelection(); + + // Connect signals to track selection changes + this->sel_changed_connection = this->selection->connectChanged( + sigc::bind(sigc::ptr_fun(&spdc_selection_changed), this) + ); + this->sel_modified_connection = this->selection->connectModified( + sigc::bind(sigc::ptr_fun(&spdc_selection_modified), this) + ); + + // Create red bpath + this->red_bpath = new Inkscape::CanvasItemBpath(desktop->getCanvasSketch()); + this->red_bpath->set_stroke(this->red_color); + this->red_bpath->set_fill(0x0, SP_WIND_RULE_NONZERO); + + // Create red curve + this->red_curve.reset(new SPCurve()); + + // Create blue bpath + this->blue_bpath = new Inkscape::CanvasItemBpath(desktop->getCanvasSketch()); + this->blue_bpath->set_stroke(this->blue_color); + this->blue_bpath->set_fill(0x0, SP_WIND_RULE_NONZERO); + + // Create blue curve + this->blue_curve.reset(new SPCurve()); + + // Create green curve + this->green_curve.reset(new SPCurve()); + + // No green anchor by default + this->green_anchor = nullptr; + this->green_closed = FALSE; + + // Create start anchor alternative curve + this->sa_overwrited.reset(new SPCurve()); + + this->attach = TRUE; + spdc_attach_selection(this, this->selection); +} + +FreehandBase::~FreehandBase() +{ + this->sel_changed_connection.disconnect(); + this->sel_modified_connection.disconnect(); + + ungrabCanvasEvents(); + + if (this->selection) { + this->selection = nullptr; + } + + spdc_free_colors(this); +} + +void FreehandBase::set(const Inkscape::Preferences::Entry& /*value*/) { +} + +bool FreehandBase::root_handler(GdkEvent* event) { + gint ret = FALSE; + + switch (event->type) { + case GDK_KEY_PRESS: + switch (get_latin_keyval (&event->key)) { + case GDK_KEY_Up: + case GDK_KEY_Down: + case GDK_KEY_KP_Up: + case GDK_KEY_KP_Down: + // prevent the zoom field from activation + if (!MOD__CTRL_ONLY(event)) { + ret = TRUE; + } + break; + default: + break; + } + break; + default: + break; + } + + if (!ret) { + ret = ToolBase::root_handler(event); + } + + return ret; +} + +std::optional<Geom::Point> FreehandBase::red_curve_get_last_point() +{ + std::optional<Geom::Point> p; + if (!red_curve->is_empty()) { + p = red_curve->last_point(); + } + return p; +} + +static Glib::ustring const tool_name(FreehandBase *dc) +{ + return ( SP_IS_PEN_CONTEXT(dc) + ? "/tools/freehand/pen" + : "/tools/freehand/pencil" ); +} + +static void spdc_paste_curve_as_freehand_shape(Geom::PathVector const &newpath, FreehandBase *dc, SPItem *item) +{ + using namespace Inkscape::LivePathEffect; + + // TODO: Don't paste path if nothing is on the clipboard + SPDocument *document = dc->getDesktop()->doc(); + Effect::createAndApply(PATTERN_ALONG_PATH, document, item); + Effect* lpe = SP_LPE_ITEM(item)->getCurrentLPE(); + static_cast<LPEPatternAlongPath*>(lpe)->pattern.set_new_value(newpath,true); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + double scale = prefs->getDouble("/live_effects/skeletal/width", 1); + if (!scale) { + scale = 1; + } + Inkscape::SVGOStringStream os; + os << scale; + lpe->getRepr()->setAttribute("prop_scale", os.str()); +} + +void spdc_apply_style(SPObject *obj) +{ + SPCSSAttr *css = sp_repr_css_attr_new(); + if (obj->style) { + if (obj->style->stroke.isPaintserver()) { + SPPaintServer *server = obj->style->getStrokePaintServer(); + if (server) { + Glib::ustring str; + str += "url(#"; + str += server->getId(); + str += ")"; + sp_repr_css_set_property(css, "fill", str.c_str()); + } + } else if (obj->style->stroke.isColor()) { + gchar c[64]; + sp_svg_write_color( + c, sizeof(c), + obj->style->stroke.value.color.toRGBA32(SP_SCALE24_TO_FLOAT(obj->style->stroke_opacity.value))); + sp_repr_css_set_property(css, "fill", c); + } else { + sp_repr_css_set_property(css, "fill", "none"); + } + } else { + sp_repr_css_unset_property(css, "fill"); + } + + sp_repr_css_set_property(css, "fill-rule", "nonzero"); + sp_repr_css_set_property(css, "stroke", "none"); + + sp_desktop_apply_css_recursive(obj, css, true); + sp_repr_css_attr_unref(css); +} +static void spdc_apply_powerstroke_shape(std::vector<Geom::Point> points, FreehandBase *dc, SPItem *item, + gint maxrecursion = 0) +{ + using namespace Inkscape::LivePathEffect; + SPDesktop *desktop = dc->getDesktop(); + SPDocument *document = desktop->getDocument(); + if (!document || !desktop) { + return; + } + if (SP_IS_PENCIL_CONTEXT(dc)) { + if (dc->tablet_enabled) { + SPObject *elemref = nullptr; + if ((elemref = document->getObjectById("power_stroke_preview"))) { + elemref->getRepr()->removeAttribute("style"); + SPItem *successor = dynamic_cast<SPItem *>(elemref); + sp_desktop_apply_style_tool(desktop, successor->getRepr(), + Glib::ustring("/tools/freehand/pencil").data(), false); + spdc_apply_style(successor); + sp_object_ref(item); + item->deleteObject(false); + item->setSuccessor(successor); + sp_object_unref(item); + item = dynamic_cast<SPItem *>(successor); + dc->selection->set(item); + item->setLocked(false); + dc->white_item = item; + rename_id(item, "path-1"); + } + return; + } + } + Effect::createAndApply(POWERSTROKE, document, item); + Effect* lpe = SP_LPE_ITEM(item)->getCurrentLPE(); + + static_cast<LPEPowerStroke*>(lpe)->offset_points.param_set_and_write_new_value(points); + + // write powerstroke parameters: + lpe->getRepr()->setAttribute("start_linecap_type", "zerowidth"); + lpe->getRepr()->setAttribute("end_linecap_type", "zerowidth"); + lpe->getRepr()->setAttribute("sort_points", "true"); + lpe->getRepr()->setAttribute("not_jump", "false"); + lpe->getRepr()->setAttribute("interpolator_type", "CubicBezierJohan"); + lpe->getRepr()->setAttribute("interpolator_beta", "0.2"); + lpe->getRepr()->setAttribute("miter_limit", "4"); + lpe->getRepr()->setAttribute("scale_width", "1"); + lpe->getRepr()->setAttribute("linejoin_type", "extrp_arc"); +} + +static void spdc_apply_bend_shape(gchar const *svgd, FreehandBase *dc, SPItem *item) +{ + using namespace Inkscape::LivePathEffect; + SPUse *use = dynamic_cast<SPUse *>(item); + if ( use ) { + return; + } + SPDesktop *desktop = dc->getDesktop(); + SPDocument *document = desktop->getDocument(); + if (!document || !desktop) { + return; + } + if (!SP_IS_LPE_ITEM(item)) { + return; + } + if(!SP_LPE_ITEM(item)->hasPathEffectOfType(BEND_PATH)){ + Effect::createAndApply(BEND_PATH, document, item); + } + Effect* lpe = SP_LPE_ITEM(item)->getCurrentLPE(); + + // write bend parameters: + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + double scale = prefs->getDouble("/live_effects/bend_path/width", 1); + if (!scale) { + scale = 1; + } + Inkscape::SVGOStringStream os; + os << scale; + lpe->getRepr()->setAttribute("prop_scale", os.str()); + lpe->getRepr()->setAttribute("scale_y_rel", "false"); + lpe->getRepr()->setAttribute("vertical", "false"); + static_cast<LPEBendPath*>(lpe)->bend_path.paste_param_path(svgd); +} + +static void spdc_apply_simplify(std::string threshold, FreehandBase *dc, SPItem *item) +{ + const SPDesktop *desktop = dc->getDesktop(); + SPDocument *document = desktop->getDocument(); + if (!document || !desktop) { + return; + } + using namespace Inkscape::LivePathEffect; + + Effect::createAndApply(SIMPLIFY, document, item); + Effect* lpe = SP_LPE_ITEM(item)->getCurrentLPE(); + // write simplify parameters: + lpe->getRepr()->setAttribute("steps", "1"); + lpe->getRepr()->setAttributeOrRemoveIfEmpty("threshold", threshold); + lpe->getRepr()->setAttribute("smooth_angles", "360"); + lpe->getRepr()->setAttribute("helper_size", "0"); + lpe->getRepr()->setAttribute("simplify_individual_paths", "false"); + lpe->getRepr()->setAttribute("simplify_just_coalesce", "false"); +} + +static shapeType previous_shape_type = NONE; + +static void spdc_check_for_and_apply_waiting_LPE(FreehandBase *dc, SPItem *item, SPCurve *curve, bool is_bend) +{ + using namespace Inkscape::LivePathEffect; + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + auto *desktop = dc->getDesktop(); + + if (item && SP_IS_LPE_ITEM(item)) { + double defsize = 10 / (0.265 * dc->getDesktop()->getDocument()->getDocumentScale()[0]); +#define SHAPE_LENGTH defsize +#define SHAPE_HEIGHT defsize + //Store the clipboard path to apply in the future without the use of clipboard + static Geom::PathVector previous_shape_pathv; + static SPItem *bend_item = nullptr; + shapeType shape = (shapeType)prefs->getInt(tool_name(dc) + "/shape", 0); + if (previous_shape_type == NONE) { + previous_shape_type = shape; + } + if(shape == LAST_APPLIED){ + shape = previous_shape_type; + if(shape == CLIPBOARD || shape == BEND_CLIPBOARD){ + shape = LAST_APPLIED; + } + } + Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get(); + if (is_bend && + (shape == BEND_CLIPBOARD || (shape == LAST_APPLIED && previous_shape_type != CLIPBOARD)) && + cm->paste(desktop, true)) + { + bend_item = dc->selection->singleItem(); + if(!bend_item || (!SP_IS_SHAPE(bend_item) && !SP_IS_GROUP(bend_item))){ + previous_shape_type = NONE; + return; + } + } else if(is_bend) { + return; + } + if (!is_bend && previous_shape_type == BEND_CLIPBOARD && shape == BEND_CLIPBOARD) { + return; + } + bool shape_applied = false; + bool simplify = prefs->getInt(tool_name(dc) + "/simplify", 0); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + guint mode = prefs->getInt("/tools/freehand/pencil/freehand-mode", 0); + if(simplify && mode != 2){ + double tol = prefs->getDoubleLimited("/tools/freehand/pencil/tolerance", 10.0, 1.0, 100.0); + tol = tol/(100.0*(102.0-tol)); + std::ostringstream ss; + ss << tol; + spdc_apply_simplify(ss.str(), dc, item); + sp_lpe_item_update_patheffect(SP_LPE_ITEM(item), true, false); + } + if (prefs->getInt(tool_name(dc) + "/freehand-mode", 0) == 1) { + Effect::createAndApply(SPIRO, dc->getDesktop()->getDocument(), item); + } + + if (prefs->getInt(tool_name(dc) + "/freehand-mode", 0) == 2) { + Effect::createAndApply(BSPLINE, dc->getDesktop()->getDocument(), item); + } + SPShape *sp_shape = dynamic_cast<SPShape *>(item); + if (sp_shape) { + curve = sp_shape->curve(); + } + auto curveref = curve->ref(); + SPCSSAttr *css_item = sp_css_attr_from_object(item, SP_STYLE_FLAG_ALWAYS); + const char *cstroke = sp_repr_css_property(css_item, "stroke", "none"); + const char *cfill = sp_repr_css_property(css_item, "fill", "none"); + const char *stroke_width = sp_repr_css_property(css_item, "stroke-width", "0"); + double swidth; + sp_svg_number_read_d(stroke_width, &swidth); + swidth = prefs->getDouble("/live_effects/powerstroke/width", SHAPE_HEIGHT / 2); + if (!swidth) { + swidth = swidth/2; + } + swidth = std::abs(swidth); + if (SP_IS_PENCIL_CONTEXT(dc)) { + if (dc->tablet_enabled) { + std::vector<Geom::Point> points; + spdc_apply_powerstroke_shape(points, dc, item); + shape_applied = true; + shape = NONE; + previous_shape_type = NONE; + } + } + + switch (shape) { + case NONE: + // don't apply any shape + break; + case TRIANGLE_IN: + { + // "triangle in" + std::vector<Geom::Point> points(1); + + points[0] = Geom::Point(0., swidth); + //points[0] *= i2anc_affine(static_cast<SPItem *>(item->parent), NULL).inverse(); + spdc_apply_powerstroke_shape(points, dc, item); + + shape_applied = false; + break; + } + case TRIANGLE_OUT: + { + // "triangle out" + guint curve_length = curveref->get_segment_count(); + std::vector<Geom::Point> points(1); + points[0] = Geom::Point(0, swidth); + //points[0] *= i2anc_affine(static_cast<SPItem *>(item->parent), NULL).inverse(); + points[0][Geom::X] = (double)curve_length; + spdc_apply_powerstroke_shape(points, dc, item); + + shape_applied = false; + break; + } + case ELLIPSE: + { + // "ellipse" + auto c = std::make_unique<SPCurve>(); + const double C1 = 0.552; + c->moveto(0, SHAPE_HEIGHT/2); + c->curveto(0, (1 - C1) * SHAPE_HEIGHT/2, (1 - C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH/2, 0); + c->curveto((1 + C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH, (1 - C1) * SHAPE_HEIGHT/2, SHAPE_LENGTH, SHAPE_HEIGHT/2); + c->curveto(SHAPE_LENGTH, (1 + C1) * SHAPE_HEIGHT/2, (1 + C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, SHAPE_LENGTH/2, SHAPE_HEIGHT); + c->curveto((1 - C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, 0, (1 + C1) * SHAPE_HEIGHT/2, 0, SHAPE_HEIGHT/2); + c->closepath(); + spdc_paste_curve_as_freehand_shape(c->get_pathvector(), dc, item); + + shape_applied = true; + break; + } + case CLIPBOARD: + { + // take shape from clipboard; + Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get(); + if(cm->paste(desktop,true)){ + SPItem * pasted_clipboard = dc->selection->singleItem(); + dc->selection->toCurves(true); + pasted_clipboard = dc->selection->singleItem(); + if(pasted_clipboard){ + Inkscape::XML::Node *pasted_clipboard_root = pasted_clipboard->getRepr(); + Inkscape::XML::Node *path = sp_repr_lookup_name(pasted_clipboard_root, "svg:path", -1); // unlimited search depth + if ( path != nullptr ) { + gchar const *svgd = path->attribute("d"); + dc->selection->remove(pasted_clipboard); + previous_shape_pathv = sp_svg_read_pathv(svgd); + previous_shape_pathv *= pasted_clipboard->transform; + spdc_paste_curve_as_freehand_shape(previous_shape_pathv, dc, item); + + shape = CLIPBOARD; + shape_applied = true; + pasted_clipboard->deleteObject(); + } else { + shape = NONE; + } + } else { + shape = NONE; + } + } else { + shape = NONE; + } + break; + } + case BEND_CLIPBOARD: + { + gchar const *svgd = item->getRepr()->attribute("d"); + if(bend_item && (SP_IS_SHAPE(bend_item) || SP_IS_GROUP(bend_item))){ + // If item is a SPRect, convert it to path first: + if ( dynamic_cast<SPRect *>(bend_item) ) { + if (desktop) { + Inkscape::Selection *sel = desktop->getSelection(); + if ( sel && !sel->isEmpty() ) { + sel->clear(); + sel->add(bend_item); + sel->toCurves(); + bend_item = sel->singleItem(); + } + } + } + bend_item->moveTo(item,false); + bend_item->transform.setTranslation(Geom::Point()); + spdc_apply_bend_shape(svgd, dc, bend_item); + dc->selection->add(bend_item); + + shape = BEND_CLIPBOARD; + } else { + bend_item = nullptr; + shape = NONE; + } + break; + } + case LAST_APPLIED: + { + if(previous_shape_type == CLIPBOARD){ + if(previous_shape_pathv.size() != 0){ + spdc_paste_curve_as_freehand_shape(previous_shape_pathv, dc, item); + shape_applied = true; + shape = CLIPBOARD; + } else{ + shape = NONE; + } + } else { + if(bend_item != nullptr && bend_item->getRepr() != nullptr){ + gchar const *svgd = item->getRepr()->attribute("d"); + dc->selection->add(bend_item); + dc->selection->duplicate(); + dc->selection->remove(bend_item); + bend_item = dc->selection->singleItem(); + if(bend_item){ + bend_item->moveTo(item,false); + Geom::Coord expansion_X = bend_item->transform.expansionX(); + Geom::Coord expansion_Y = bend_item->transform.expansionY(); + bend_item->transform = Geom::Affine(1,0,0,1,0,0); + bend_item->transform.setExpansionX(expansion_X); + bend_item->transform.setExpansionY(expansion_Y); + spdc_apply_bend_shape(svgd, dc, bend_item); + dc->selection->add(bend_item); + + shape = BEND_CLIPBOARD; + } else { + shape = NONE; + } + } else { + shape = NONE; + } + } + break; + } + default: + break; + } + previous_shape_type = shape; + + if (shape_applied) { + // apply original stroke color as fill and unset stroke; then return + SPCSSAttr *css = sp_repr_css_attr_new(); + if (!strcmp(cfill, "none")) { + sp_repr_css_set_property (css, "fill", cstroke); + } else { + sp_repr_css_set_property (css, "fill", cfill); + } + sp_repr_css_set_property (css, "stroke", "none"); + sp_desktop_apply_css_recursive(dc->white_item, css, true); + sp_repr_css_attr_unref(css); + return; + } + if (dc->waiting_LPE_type != INVALID_LPE) { + Effect::createAndApply(dc->waiting_LPE_type, dc->getDesktop()->getDocument(), item); + dc->waiting_LPE_type = INVALID_LPE; + + if (SP_IS_LPETOOL_CONTEXT(dc)) { + // since a geometric LPE was applied, we switch back to "inactive" mode + lpetool_context_switch_mode(SP_LPETOOL_CONTEXT(dc), INVALID_LPE); + } + } + if (SP_IS_PEN_CONTEXT(dc)) { + SP_PEN_CONTEXT(dc)->setPolylineMode(); + } + } +} + +/* + * Selection handlers + */ + +static void spdc_selection_changed(Inkscape::Selection *sel, FreehandBase *dc) +{ + if (dc->attach) { + spdc_attach_selection(dc, sel); + } +} + +/* fixme: We have to ensure this is not delayed (Lauris) */ + +static void spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, FreehandBase *dc) +{ + if (dc->attach) { + spdc_attach_selection(dc, sel); + } +} + +static void spdc_attach_selection(FreehandBase *dc, Inkscape::Selection */*sel*/) +{ + // We reset white and forget white/start/end anchors + spdc_reset_white(dc); + dc->sa = nullptr; + dc->ea = nullptr; + + SPItem *item = dc->selection ? dc->selection->singleItem() : nullptr; + + if ( item && SP_IS_PATH(item) ) { + // Create new white data + // Item + dc->white_item = item; + + // Curve list + // We keep it in desktop coordinates to eliminate calculation errors + auto path = static_cast<SPPath *>(item); + auto norm = SPCurve::copy(path->curveForEdit()); + g_return_if_fail( norm != nullptr ); + norm->transform((dc->white_item)->i2dt_affine()); + dc->white_curves = norm->split(); + + // Anchor list + for (auto const &c_smart_ptr : dc->white_curves) { + auto *c = c_smart_ptr.get(); + g_return_if_fail( c->get_segment_count() > 0 ); + if ( !c->is_closed() ) { + std::unique_ptr<SPDrawAnchor> a = + std::make_unique<SPDrawAnchor>(dc, c, TRUE, *(c->first_point())); + if (a) + dc->white_anchors.push_back(std::move(a)); + a = std::make_unique<SPDrawAnchor>(dc, c, FALSE, *(c->last_point())); + if (a) + dc->white_anchors.push_back(std::move(a)); + } + } + // fixme: recalculate active anchor? + } +} + + +void spdc_endpoint_snap_rotation(ToolBase* const ec, Geom::Point &p, Geom::Point const &o, + guint state) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12)); + + SnapManager &m = ec->getDesktop()->namedview->snap_manager; + m.setup(ec->getDesktop()); + + bool snap_enabled = m.snapprefs.getSnapEnabledGlobally(); + if (state & GDK_SHIFT_MASK) { + // SHIFT disables all snapping, except the angular snapping. After all, the user explicitly asked for angular + // snapping by pressing CTRL, otherwise we wouldn't have arrived here. But although we temporarily disable + // the snapping here, we must still call for a constrained snap in order to apply the constraints (i.e. round + // to the nearest angle increment) + m.snapprefs.setSnapEnabledGlobally(false); + } + + Inkscape::SnappedPoint dummy = m.constrainedAngularSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE), std::optional<Geom::Point>(), o, snaps); + p = dummy.getPoint(); + + if (state & GDK_SHIFT_MASK) { + m.snapprefs.setSnapEnabledGlobally(snap_enabled); // restore the original setting + } + + m.unSetup(); +} + + +void spdc_endpoint_snap_free(ToolBase* const ec, Geom::Point& p, std::optional<Geom::Point> &start_of_line, guint const /*state*/) +{ + const SPDesktop *dt = ec->getDesktop(); + SnapManager &m = dt->namedview->snap_manager; + Inkscape::Selection *selection = dt->getSelection(); + + // selection->singleItem() is the item that is currently being drawn. This item will not be snapped to (to avoid self-snapping) + // TODO: Allow snapping to the stationary parts of the item, and only ignore the last segment + + m.setup(dt, true, selection->singleItem()); + Inkscape::SnapCandidatePoint scp(p, Inkscape::SNAPSOURCE_NODE_HANDLE); + if (start_of_line) { + scp.addOrigin(*start_of_line); + } + + Inkscape::SnappedPoint sp = m.freeSnap(scp); + p = sp.getPoint(); + + m.unSetup(); +} + +void spdc_concat_colors_and_flush(FreehandBase *dc, gboolean forceclosed) +{ + // Concat RBG + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + // Green + auto c = std::make_unique<SPCurve>(); + std::swap(c, dc->green_curve); + for (auto path : dc->green_bpaths) { + delete path; + } + dc->green_bpaths.clear(); + + // Blue + c->append_continuous(*dc->blue_curve); + dc->blue_curve->reset(); + dc->blue_bpath->set_bpath(nullptr); + + // Red + if (dc->red_curve_is_valid) { + c->append_continuous(*(dc->red_curve)); + } + dc->red_curve->reset(); + dc->red_bpath->set_bpath(nullptr); + + if (c->is_empty()) { + return; + } + + // Step A - test, whether we ended on green anchor + if ( (forceclosed && + (!dc->sa || (dc->sa && dc->sa->curve->is_empty()))) || + ( dc->green_anchor && dc->green_anchor->active)) + { + // We hit green anchor, closing Green-Blue-Red + dc->getDesktop()->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed.")); + c->closepath_current(); + // Closed path, just flush + spdc_flush_white(dc, c.get()); + return; + } + + // Step B - both start and end anchored to same curve + if ( dc->sa && dc->ea + && ( dc->sa->curve == dc->ea->curve ) + && ( ( dc->sa != dc->ea ) + || dc->sa->curve->is_closed() ) ) + { + // We hit bot start and end of single curve, closing paths + dc->getDesktop()->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path.")); + dc->sa_overwrited->append_continuous(*c); + dc->sa_overwrited->closepath_current(); + if (!dc->white_curves.empty()) { + dc->white_curves.erase(std::find(dc->white_curves.begin(),dc->white_curves.end(), dc->sa->curve)); + } + dc->white_curves.push_back(std::move(dc->sa_overwrited)); + spdc_flush_white(dc, nullptr); + return; + } + // Step C - test start + if (dc->sa) { + if (!dc->white_curves.empty()) { + dc->white_curves.erase(std::find(dc->white_curves.begin(),dc->white_curves.end(), dc->sa->curve)); + } + dc->sa_overwrited->append_continuous(*c); + c = std::move(dc->sa_overwrited); + } else /* Step D - test end */ if (dc->ea) { + auto e = std::move(dc->ea->curve); + if (!dc->white_curves.empty()) { + dc->white_curves.erase(std::find(dc->white_curves.begin(),dc->white_curves.end(), e)); + } + if (!dc->ea->start) { + e = e->create_reverse(); + } + if(prefs->getInt(tool_name(dc) + "/freehand-mode", 0) == 1 || + prefs->getInt(tool_name(dc) + "/freehand-mode", 0) == 2){ + e = e->create_reverse(); + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*e->last_segment()); + if(cubic){ + auto lastSeg = std::make_unique<SPCurve>(); + lastSeg->moveto((*cubic)[0]); + lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]); + if( e->get_segment_count() == 1){ + e = std::move(lastSeg); + }else{ + //we eliminate the last segment + e->backspace(); + //and we add it again with the recreation + e->append_continuous(*lastSeg); + } + } + e = e->create_reverse(); + } + c->append_continuous(*e); + } + if (forceclosed) + { + dc->getDesktop()->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed.")); + c->closepath_current(); + } + spdc_flush_white(dc, c.get()); +} + +static void spdc_flush_white(FreehandBase *dc, SPCurve *gc) +{ + std::unique_ptr<SPCurve> c; + + if (! dc->white_curves.empty()) { + g_assert(dc->white_item); + + // c = concat(white_curves) + c = std::make_unique<SPCurve>(); + for (auto const &wc : dc->white_curves) { + c->append(*wc); + } + + dc->white_curves.clear(); + if (gc) { + c->append(*gc); + } + } else if (gc) { + c = gc->ref(); + } else { + return; + } + + SPDesktop *desktop = dc->getDesktop(); + SPDocument *doc = desktop->getDocument(); + Inkscape::XML::Document *xml_doc = doc->getReprDoc(); + + // Now we have to go back to item coordinates at last + c->transform( dc->white_item + ? (dc->white_item)->dt2i_affine() + : desktop->dt2doc() ); + + if ( c && !c->is_empty() ) { + // We actually have something to write + + bool has_lpe = false; + Inkscape::XML::Node *repr; + + if (dc->white_item) { + repr = dc->white_item->getRepr(); + has_lpe = SP_LPE_ITEM(dc->white_item)->hasPathEffectRecursive(); + } else { + repr = xml_doc->createElement("svg:path"); + // Set style + sp_desktop_apply_style_tool(desktop, repr, tool_name(dc).data(), false); + } + + auto str = sp_svg_write_path(c->get_pathvector()); + if (has_lpe) + repr->setAttribute("inkscape:original-d", str); + else + repr->setAttribute("d", str); + + auto layer = dc->currentLayer(); + if (SP_IS_PENCIL_CONTEXT(dc) && dc->tablet_enabled) { + if (!dc->white_item) { + dc->white_item = SP_ITEM(layer->appendChildRepr(repr)); + } + spdc_check_for_and_apply_waiting_LPE(dc, dc->white_item, c.get(), false); + } + if (!dc->white_item) { + // Attach repr + SPItem *item = dynamic_cast<SPItem *>(layer->appendChildRepr(repr)); + dc->white_item = item; + //Bend needs the transforms applied after, Other effects best before + spdc_check_for_and_apply_waiting_LPE(dc, item, c.get(), true); + Inkscape::GC::release(repr); + item->transform = layer->i2doc_affine().inverse(); + item->updateRepr(); + item->doWriteTransform(item->transform, nullptr, true); + spdc_check_for_and_apply_waiting_LPE(dc, item, c.get(), false); + if(previous_shape_type == BEND_CLIPBOARD){ + repr->parent()->removeChild(repr); + dc->white_item = nullptr; + } else { + dc->selection->set(repr); + } + } + SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(dc->white_item); + if (lpeitem && lpeitem->hasPathEffectRecursive()) { + sp_lpe_item_update_patheffect(lpeitem, true, false); + } + DocumentUndo::done(doc, _("Draw path"), SP_IS_PEN_CONTEXT(dc)? INKSCAPE_ICON("draw-path") : INKSCAPE_ICON("draw-freehand")); + + // When quickly drawing several subpaths with Shift, the next subpath may be finished and + // flushed before the selection_modified signal is fired by the previous change, which + // results in the tool losing all of the selected path's curve except that last subpath. To + // fix this, we force the selection_modified callback now, to make sure the tool's curve is + // in sync immediately. + spdc_selection_modified(desktop->getSelection(), 0, dc); + } + + // Flush pending updates + doc->ensureUpToDate(); +} + +SPDrawAnchor *spdc_test_inside(FreehandBase *dc, Geom::Point p) +{ + SPDrawAnchor *active = nullptr; + + // Test green anchor + if (dc->green_anchor) { + active = dc->green_anchor->anchorTest(p, TRUE); + } + + for (auto& i:dc->white_anchors) { + SPDrawAnchor *na = i->anchorTest(p, !active); + if ( !active && na ) { + active = na; + } + } + return active; +} + +static void spdc_reset_white(FreehandBase *dc) +{ + if (dc->white_item) { + // We do not hold refcount + dc->white_item = nullptr; + } + dc->white_curves.clear(); + dc->white_anchors.clear(); +} + +static void spdc_free_colors(FreehandBase *dc) +{ + // Red + if (dc->red_bpath) { + delete dc->red_bpath; + dc->red_bpath = nullptr; + } + dc->red_curve.reset(); + + // Blue + if (dc->blue_bpath) { + delete dc->blue_bpath; + dc->blue_bpath = nullptr; + } + dc->blue_curve.reset(); + + // Overwrite start anchor curve + dc->sa_overwrited.reset(); + // Green + for (auto path : dc->green_bpaths) { + delete path; + } + dc->green_bpaths.clear(); + dc->green_curve.reset(); + dc->green_anchor.reset(); + + // White + if (dc->white_item) { + // We do not hold refcount + dc->white_item = nullptr; + } + dc->white_curves.clear(); + dc->white_anchors.clear(); +} + +void spdc_create_single_dot(ToolBase *ec, Geom::Point const &pt, char const *tool, guint event_state) { + g_return_if_fail(!strcmp(tool, "/tools/freehand/pen") || !strcmp(tool, "/tools/freehand/pencil") + || !strcmp(tool, "/tools/calligraphic") ); + Glib::ustring tool_path = tool; + + SPDesktop *desktop = ec->getDesktop(); + Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc(); + Inkscape::XML::Node *repr = xml_doc->createElement("svg:path"); + repr->setAttribute("sodipodi:type", "arc"); + auto layer = ec->currentLayer(); + SPItem *item = SP_ITEM(layer->appendChildRepr(repr)); + item->transform = layer->i2doc_affine().inverse(); + Inkscape::GC::release(repr); + + // apply the tool's current style + sp_desktop_apply_style_tool(desktop, repr, tool, false); + + // find out stroke width (TODO: is there an easier way??) + double stroke_width = 3.0; + gchar const *style_str = repr->attribute("style"); + if (style_str) { + SPStyle style(desktop->doc()); + style.mergeString(style_str); + stroke_width = style.stroke_width.computed; + } + + // unset stroke and set fill color to former stroke color + gchar * str; + str = strcmp(tool, "/tools/calligraphic") ? g_strdup_printf("fill:#%06x;stroke:none;", sp_desktop_get_color_tool(desktop, tool, false) >> 8) + : g_strdup_printf("fill:#%06x;stroke:#%06x;", sp_desktop_get_color_tool(desktop, tool, true) >> 8, sp_desktop_get_color_tool(desktop, tool, false) >> 8); + repr->setAttribute("style", str); + g_free(str); + + // put the circle where the mouse click occurred and set the diameter to the + // current stroke width, multiplied by the amount specified in the preferences + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + Geom::Affine const i2d (item->i2dt_affine ()); + Geom::Point pp = pt * i2d.inverse(); + + double rad = 0.5 * prefs->getDouble(tool_path + "/dot-size", 3.0); + if (!strcmp(tool, "/tools/calligraphic")) + rad = 0.0333 * prefs->getDouble(tool_path + "/width", 3.0) / desktop->current_zoom() / desktop->getDocument()->getDocumentScale()[Geom::X]; + if (event_state & GDK_MOD1_MASK) { + // TODO: We vary the dot size between 0.5*rad and 1.5*rad, where rad is the dot size + // as specified in prefs. Very simple, but it might be sufficient in practice. If not, + // we need to devise something more sophisticated. + double s = g_random_double_range(-0.5, 0.5); + rad *= (1 + s); + } + if (event_state & GDK_SHIFT_MASK) { + // double the point size + rad *= 2; + } + + repr->setAttributeSvgDouble("sodipodi:cx", pp[Geom::X]); + repr->setAttributeSvgDouble("sodipodi:cy", pp[Geom::Y]); + repr->setAttributeSvgDouble("sodipodi:rx", rad * stroke_width); + repr->setAttributeSvgDouble("sodipodi:ry", rad * stroke_width); + item->updateRepr(); + item->doWriteTransform(item->transform, nullptr, true); + + desktop->getSelection()->set(item); + + desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating single dot")); + DocumentUndo::done(desktop->getDocument(), _("Create single dot"), ""); +} + +} +} +} + +/* + 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 : |