c6506aa7090643badb5a6dca5df0ca6617558f5eChristian Maeder#define __SP_PATH_C__

c6506aa7090643badb5a6dca5df0ca6617558f5eChristian Maeder

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <glibmm/i18n.h>

#include <display/curve.h>

#include <libnr/n-art-bpath.h>

#include <libnr/nr-path.h>

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

#include "svg/svg.h"

#include "xml/repr.h"

#include "attributes.h"

#include "sp-path.h"

#include "sp-guide.h"

#include "document.h"

#include "desktop.h"

#include "desktop-handles.h"

#include "desktop-style.h"

#include "event-context.h"

#include "inkscape.h"

#include "style.h"

#include "message-stack.h"

#include "prefs-utils.h"

#include "selection.h"

#define noPATH_VERBOSE

static void sp_path_class_init(SPPathClass *klass);

static void sp_path_init(SPPath *path);

static void sp_path_finalize(GObject *obj);

static void sp_path_release(SPObject *object);

static void sp_path_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);

static void sp_path_set(SPObject *object, unsigned key, gchar const *value);

static Inkscape::XML::Node *sp_path_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);

static NR::Matrix sp_path_set_transform(SPItem *item, NR::Matrix const &xform);

static gchar * sp_path_description(SPItem *item);

static void sp_path_convert_to_guides(SPItem *item);

static void sp_path_update(SPObject *object, SPCtx *ctx, guint flags);

static void sp_path_update_patheffect(SPShape *shape, bool write);

static SPShapeClass *parent_class;

sp_path_get_type(void)

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPPathClass),

NULL, NULL,

(GClassInitFunc) sp_path_class_init,

NULL, NULL,

sizeof(SPPath),

16,

(GInstanceInitFunc) sp_path_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_SHAPE, "SPPath", &info, (GTypeFlags)0);

}

return type;

}

static void

sp_path_class_init(SPPathClass * klass)

{

GObjectClass *gobject_class = (GObjectClass *) klass;

SPObjectClass *sp_object_class = (SPObjectClass *) klass;

SPItemClass *item_class = (SPItemClass *) klass;

SPShapeClass *shape_class = (SPShapeClass *) klass;

parent_class = (SPShapeClass *)g_type_class_peek_parent(klass);

gobject_class->finalize = sp_path_finalize;

sp_object_class->build = sp_path_build;

sp_object_class->release = sp_path_release;

sp_object_class->set = sp_path_set;

sp_object_class->write = sp_path_write;

sp_object_class->update = sp_path_update;

item_class->description = sp_path_description;

item_class->set_transform = sp_path_set_transform;

item_class->convert_to_guides = sp_path_convert_to_guides;

shape_class->update_patheffect = sp_path_update_patheffect;

}

sp_nodes_in_path(SPPath *path)

{

SPCurve *curve = SP_SHAPE(path)->curve;

if (!curve) return 0;

gint r = curve->end;

gint i = curve->length - 1;

if (i > r) i = r; // sometimes after switching from node editor length is wrong, e.g. f6 - draw - f2 - tab - f1, this fixes it

for (; i >= 0; i --)

if (SP_CURVE_BPATH(curve)[i].code == NR_MOVETO)

r --;

return r;

}

static gchar *

sp_path_description(SPItem * item)

{

int count = sp_nodes_in_path(SP_PATH(item));

if (SP_SHAPE(item)->path_effect_href) {

return g_strdup_printf(ngettext("<b>Path</b> (%i node, path effect)",

"<b>Path</b> (%i nodes, path effect)",count), count);

} else {

return g_strdup_printf(ngettext("<b>Path</b> (%i node)",

"<b>Path</b> (%i nodes)",count), count);

}

}

static void

sp_path_convert_to_guides(SPItem *item)

{

SPPath *path = SP_PATH(item);

SPDocument *doc = SP_OBJECT_DOCUMENT(path);

std::list<std::pair<Geom::Point, Geom::Point> > pts;

NR::Matrix const i2d (sp_item_i2d_affine(SP_ITEM(path)));

SPCurve *curve = SP_SHAPE(path)->curve;

if (!curve) return;

NArtBpath *bpath = SP_CURVE_BPATH(curve);

NR::Point last_pt;

NR::Point pt;

for (int i = 0; bpath[i].code != NR_END; i++){

if (bpath[i].code == NR_LINETO) {

/* we only convert straight line segments (converting curve segments would be unintuitive) */

pt = bpath[i].c(3) * i2d;

pts.push_back(std::make_pair(last_pt.to_2geom(), pt.to_2geom()));

}

/* remember current point for potential reuse in the next step

last_pt = bpath[i].c(3) * i2d;

}

sp_guide_pt_pairs_to_guides(doc, pts);

}

static void

sp_path_init(SPPath *path)

{

new (&path->connEndPair) SPConnEndPair(path);

path->original_curve = NULL;

}

static void

sp_path_finalize(GObject *obj)

{

SPPath *path = (SPPath *) obj;

path->connEndPair.~SPConnEndPair();

}

static void

sp_path_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)

{

/* Are these calls actually necessary? */

sp_object_read_attr(object, "marker");

sp_object_read_attr(object, "marker-start");

sp_object_read_attr(object, "marker-mid");

sp_object_read_attr(object, "marker-end");

sp_conn_end_pair_build(object);

if (((SPObjectClass *) parent_class)->build) {

((SPObjectClass *) parent_class)->build(object, document, repr);

}

sp_object_read_attr(object, "inkscape:original-d");

sp_object_read_attr(object, "d");

/* d is a required attribute */

gchar const *d = sp_object_getAttribute(object, "d", NULL);

if (d == NULL) {

sp_object_set(object, sp_attribute_lookup("d"), "");

}

}

static void

sp_path_release(SPObject *object)

{

SPPath *path = SP_PATH(object);

path->connEndPair.release();

if (path->original_curve) {

path->original_curve = sp_curve_unref (path->original_curve);

}

if (((SPObjectClass *) parent_class)->release) {

((SPObjectClass *) parent_class)->release(object);

}

}

static void

sp_path_set(SPObject *object, unsigned int key, gchar const *value)

{

SPPath *path = (SPPath *) object;

switch (key) {

case SP_ATTR_INKSCAPE_ORIGINAL_D:

if (value) {

NArtBpath *bpath = sp_svg_read_path(value);

SPCurve *curve = sp_curve_new_from_bpath(bpath);

if (curve) {

sp_path_set_original_curve(path, curve, TRUE, true);

sp_curve_unref(curve);

}

} else {

sp_path_set_original_curve(path, NULL, TRUE, true);

}

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

break;

case SP_ATTR_D:

if (!((SPShape *) path)->path_effect_href) {

if (value) {

NArtBpath *bpath = sp_svg_read_path(value);

SPCurve *curve = sp_curve_new_from_bpath(bpath);

if (curve) {

sp_shape_set_curve((SPShape *) path, curve, TRUE);

sp_curve_unref(curve);

}

} else {

sp_shape_set_curve((SPShape *) path, NULL, TRUE);

}

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

}

break;

case SP_PROP_MARKER:

case SP_PROP_MARKER_START:

case SP_PROP_MARKER_MID:

case SP_PROP_MARKER_END:

sp_shape_set_marker(object, key, value);

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

break;

case SP_ATTR_CONNECTOR_TYPE:

case SP_ATTR_CONNECTION_START:

case SP_ATTR_CONNECTION_END:

path->connEndPair.setAttr(key, value);

break;

default:

if (((SPObjectClass *) parent_class)->set) {

((SPObjectClass *) parent_class)->set(object, key, value);

}

break;

}

}

static Inkscape::XML::Node *

sp_path_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)

{

SPShape *shape = (SPShape *) object;

if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {

Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));

repr = xml_doc->createElement("svg:path");

}

if ( shape->curve != NULL ) {

NArtBpath *abp = sp_curve_first_bpath(shape->curve);

if (abp) {

gchar *str = sp_svg_write_path(abp);

repr->setAttribute("d", str);

g_free(str);

} else {

repr->setAttribute("d", "");

}

} else {

repr->setAttribute("d", NULL);

}

SPPath *path = (SPPath *) object;

if ( path->original_curve != NULL ) {

NArtBpath *abp = sp_curve_first_bpath(path->original_curve);

if (abp) {

gchar *str = sp_svg_write_path(abp);

repr->setAttribute("inkscape:original-d", str);

g_free(str);

} else {

repr->setAttribute("inkscape:original-d", "");

}

} else {

repr->setAttribute("inkscape:original-d", NULL);

}

SP_PATH(shape)->connEndPair.writeRepr(repr);

if (((SPObjectClass *)(parent_class))->write) {

((SPObjectClass *)(parent_class))->write(object, repr, flags);

}

return repr;

}

static void

sp_path_update(SPObject *object, SPCtx *ctx, guint flags)

{

if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {

flags &= ~SP_OBJECT_USER_MODIFIED_FLAG_B; // since we change the description, it's not a "just translation" anymore

}

if (((SPObjectClass *) parent_class)->update) {

((SPObjectClass *) parent_class)->update(object, ctx, flags);

}

SPPath *path = SP_PATH(object);

path->connEndPair.update();

}

static NR::Matrix

sp_path_set_transform(SPItem *item, NR::Matrix const &xform)

{

SPShape *shape = (SPShape *) item;

SPPath *path = (SPPath *) item;

if (!shape->curve) { // 0 nodes, nothing to transform

return NR::identity();

}

if (path->original_curve) { /* Transform the original-d path */

NRBPath dorigpath, sorigpath;

sorigpath.path = SP_CURVE_BPATH(path->original_curve);

nr_path_duplicate_transform(&dorigpath, &sorigpath, xform);

SPCurve *origcurve = sp_curve_new_from_bpath(dorigpath.path);

if (origcurve) {

sp_path_set_original_curve(path, origcurve, TRUE, true);

sp_curve_unref(origcurve);

}

} else { /* Transform the path */

NRBPath dpath, spath;

spath.path = SP_CURVE_BPATH(shape->curve);

nr_path_duplicate_transform(&dpath, &spath, xform);

SPCurve *curve = sp_curve_new_from_bpath(dpath.path);

if (curve) {

sp_shape_set_curve(shape, curve, TRUE);

sp_curve_unref(curve);

}

}

// Adjust stroke

sp_item_adjust_stroke(item, NR::expansion(xform));

// Adjust pattern fill

sp_item_adjust_pattern(item, xform);

// Adjust gradient fill

sp_item_adjust_gradient(item, xform);

// Adjust LPE

sp_item_adjust_livepatheffect(item, xform);

item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);

// nothing remains - we've written all of the transform, so return identity

return NR::identity();

}

static void

sp_path_update_patheffect(SPShape *shape, bool write)

{

SPPath *path = (SPPath *) shape;

if (path->original_curve) {

SPCurve *curve = sp_curve_copy (path->original_curve);

sp_shape_perform_path_effect(curve, shape);

sp_shape_set_curve(shape, curve, TRUE);

sp_curve_unref(curve);

if (write) {

// could also do SP_OBJECT(shape)->updateRepr(); but only the d attribute needs updating.

Inkscape::XML::Node *repr = SP_OBJECT_REPR(shape);

if ( shape->curve != NULL ) {

NArtBpath *abp = sp_curve_first_bpath(shape->curve);

if (abp) {

gchar *str = sp_svg_write_path(abp);

repr->setAttribute("d", str);

g_free(str);

} else {

repr->setAttribute("d", "");

}

} else {

repr->setAttribute("d", NULL);

}

}

} else {

}

}

sp_path_set_original_curve (SPPath *path, SPCurve *curve, unsigned int owner, bool write)

{

if (path->original_curve) {

path->original_curve = sp_curve_unref (path->original_curve);

}

if (curve) {

if (owner) {

path->original_curve = sp_curve_ref (curve);

} else {

path->original_curve = sp_curve_copy (curve);

}

}

sp_path_update_patheffect(path, write);

SP_OBJECT(path)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

}

SPCurve *

sp_path_get_original_curve (SPPath *path)

{

if (path->original_curve) {

return sp_curve_copy (path->original_curve);

}

return NULL;

}

SPCurve*

sp_path_get_curve_for_edit (SPPath *path)

{

if (path->original_curve) {

return sp_path_get_original_curve(path);

} else {

return sp_shape_get_curve( (SPShape *) path );

}

}

const SPCurve*

sp_path_get_curve_reference (SPPath *path)

{

if (path->original_curve) {

return path->original_curve;

} else {

return path->curve;

}

}

void freehand_create_single_dot(SPEventContext *ec, NR::Point const &pt, char const *tool, guint event_state) {

g_return_if_fail(!strcmp(tool, "tools.freehand.pen") || !strcmp(tool, "tools.freehand.pencil"));

SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);

Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());

Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");

repr->setAttribute("sodipodi:type", "arc");

SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));

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 = NULL;

style_str = repr->attribute("style");

if (style_str) {

SPStyle *style = sp_style_new(SP_ACTIVE_DOCUMENT);

sp_style_merge_from_style_string(style, style_str);

stroke_width = style->stroke_width.computed;

style->stroke_width.computed = 0;

sp_style_unref(style);

}

/* unset stroke and set fill color to former stroke color */

gchar * str;

str = g_strdup_printf("fill:#%06x;stroke:none;", 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

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

NR::Point pp = pt * i2d;

double rad = 0.5 * prefs_get_double_attribute(tool, "dot-size", 3.0);

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

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;

}

sp_repr_set_svg_double (repr, "sodipodi:cx", pp[NR::X]);

sp_repr_set_svg_double (repr, "sodipodi:cy", pp[NR::Y]);

sp_repr_set_svg_double (repr, "sodipodi:rx", rad * stroke_width);

sp_repr_set_svg_double (repr, "sodipodi:ry", rad * stroke_width);

item->updateRepr();

sp_desktop_selection(desktop)->set(item);

unsigned int tool_code = !strcmp(tool, "tools.freehand.pencil") ? SP_VERB_CONTEXT_PENCIL : SP_VERB_CONTEXT_PEN;

desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating single dot"));

sp_document_done(sp_desktop_document(desktop), tool_code, _("Create single dot"));

}