parameter.cpp

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
#include "parameter.h"
 
#include <utility>
 
#include <glibmm/i18n.h>
 
#include "inkscape.h"
#include "preferences.h"
#include "selection.h"
 
#include "display/control/canvas-item-bpath.h"
#include "display/curve.h"
#include "live_effects/effect.h"
#include "live_effects/effect-enum.h"
#include "object/sp-lpe-item.h"
#include "svg/stringstream.h"
#include "svg/svg.h"
#include "ui/icon-names.h"
#include "xml/node.h"
 
#define noLPEREALPARAM_DEBUG
 
namespace Inkscape::LivePathEffect {
 
Parameter::Parameter(Glib::ustring label, Glib::ustring tip, Glib::ustring key, Inkscape::UI::Widget::Registry *wr,
                     Effect *effect)
    : param_key(std::move(key))
    , param_wr(wr)
    , param_label(std::move(label))
    , oncanvas_editable(false)
    , widget_is_visible(true)
    , widget_is_enabled(true)
    , param_tooltip(std::move(tip))
    , param_effect(effect)
{
}
 
Parameter::~Parameter() {
    SPDesktop *desktop = SP_ACTIVE_DESKTOP;
    if (desktop && ownerlocator) {
        desktop->remove_temporary_canvasitem(ownerlocator);
    }
}
 
void Parameter::param_write_to_repr(const char *svgd)
{
    if (param_effect->getRepr()) {
        param_effect->getRepr()->setAttribute(param_key, svgd);
    }
}
 
void Parameter::write_to_SVG()
{
    param_write_to_repr(param_getSVGValue().c_str());
}
 
EffectType Parameter::effectType() const 
{ 
    if (param_effect) {
        return param_effect->effectType(); 
    }
    return INVALID_LPE;
};
 
/*
 * sometimes for example on ungrouping or loading documents we need to relay in stored value instead the volatile
 * version in the parameter
 */
void Parameter::read_from_SVG()
{
    if (auto const val = param_effect->getRepr()->attribute(param_key.c_str())) {
        param_readSVGValue(val);
    }
}
 
void Parameter::param_higlight(bool highlight)
{
    SPDesktop *desktop = SP_ACTIVE_DESKTOP;
    if (desktop) {
        if (!highlight && ownerlocator) {
            desktop->remove_temporary_canvasitem(ownerlocator);
            ownerlocator = nullptr;
        }
        if (highlight) {
            std::vector<SPLPEItem *> lpeitems = param_effect->getCurrrentLPEItems();
            if (lpeitems.size() == 1 && param_effect->is_visible) {
                SPCurve c;
                std::vector<Geom::PathVector> cs; // = param_effect->getCanvasIndicators(lpeitems[0]);
                Geom::OptRect bbox = lpeitems[0]->documentVisualBounds();
 
                if (param_effect->helperLineSatellites) {
                    std::vector<SPObject *> satellites = param_get_satellites();
                    for (auto iter : satellites) {
                        auto satelliteitem = cast<SPItem>(iter);
                        if (satelliteitem) {
                            bbox.unionWith(lpeitems[0]->documentVisualBounds());
                        }
                    }
                }
                Geom::PathVector out;
                if (bbox) {
                    Geom::Path p = Geom::Path(*bbox);
                    out.push_back(p);
                }
                cs.push_back(out);
                for (auto &p2 : cs) {
                    p2 *= desktop->dt2doc();
                    c.append(p2);
                }
                if (!c.is_empty()) {
                    desktop->remove_temporary_canvasitem(ownerlocator);
                    auto tmpitem = new Inkscape::CanvasItemBpath(desktop->getCanvasTemp(), c.get_pathvector(), true);
                    tmpitem->set_stroke(0x0000ff9a);
                    tmpitem->set_fill(0x0, SP_WIND_RULE_NONZERO); // No fill
                    ownerlocator = desktop->add_temporary_canvasitem(tmpitem, 0);
                }
            }
        }
    }
}
 
void Parameter::change_selection(Inkscape::Selection *selection)
{
    update_satellites();
}
 
void Parameter::connect_selection_changed()
{
    SPDesktop *desktop = SP_ACTIVE_DESKTOP;
    if (desktop) {
        Inkscape::Selection *selection = desktop->getSelection();
        if (selection) {
            std::vector<SPObject *> satellites = param_get_satellites();
            if (!selection_changed_connection) {
                selection_changed_connection = selection->connectChangedFirst(
                    sigc::mem_fun(*this, &Parameter::change_selection));
            }
        }
    }
}
 
void Parameter::update_satellites()
{
    if (paramType() == ParamType::SATELLITE || paramType() == ParamType::SATELLITE_ARRAY || paramType() == ParamType::PATH ||
        paramType() == ParamType::PATH_ARRAY || paramType() == ParamType::ORIGINAL_PATH || paramType() == ParamType::ORIGINAL_SATELLITE) {
        // maybe we remove desktop by change with selection get from actions-helper 
        // but this function call param_higlight with also need 
        // desktop to update helper canvas item
        if (SPDesktop *desktop = SP_ACTIVE_DESKTOP) {
            std::vector<SPLPEItem *> lpeitems = param_effect->getCurrrentLPEItems();
            if (lpeitems.size() == 1){
                DocumentUndo::ScopedInsensitive _no_undo(desktop->getDocument());
                param_higlight(false);
                Inkscape::Selection *selection = desktop->getSelection();
                if (selection) {
                    std::vector<SPObject *> satellites = param_get_satellites();
                    connect_selection_changed();
                    if (selection->singleItem()) {
                        if (param_effect->isOnClipboard()) {
                            return;
                        }
                        // we always start hiding helper path
                        for (auto iter : satellites) {
                            // if selection is current ref we highlight original sp_lpe_item to
                            // give visual feedback to the user to know what's the LPE item that generated the selection
                            if (iter && selection->includes(iter, true) && param_effect->getLPEObj()->getId() && lpeitems[0]->getId()) {
                                auto rootsatellites = cast<SPItem>(iter)->rootsatellites;
                                Glib::ustring lpeid = Glib::ustring(param_effect->getLPEObj()->getId());
                                Glib::ustring itemid = Glib::ustring(lpeitems[0]->getId());
                                std::pair<Glib::ustring, Glib::ustring> rootsatellite = std::make_pair(itemid, lpeid);
                                if (! (std::find(rootsatellites.begin(), rootsatellites.end(), rootsatellite) != rootsatellites.end()) ) {
                                    cast<SPItem>(iter)->rootsatellites.push_back(rootsatellite);
                                }
                                param_higlight(true);
                                break;
                            }
                        }
                    }
                }
            } else {
                param_higlight(false);
            }
        }
    }
}
 
/*
 * we get satellites of parameter, virtual function overided by some parameter with linked satellites
 */
std::vector<SPObject *> Parameter::param_get_satellites()
{
    std::vector<SPObject *> objs;
    return objs;
};
 
/*###########################################
 *   REAL PARAM
 */
ScalarParam::ScalarParam(const Glib::ustring &label, const Glib::ustring &tip, const Glib::ustring &key,
                         Inkscape::UI::Widget::Registry * const wr, Effect * const effect,
                         double const default_value)
    : Parameter(label, tip, key, wr, effect)
    , value(default_value)
    , min(-SCALARPARAM_G_MAXDOUBLE)
    , max(SCALARPARAM_G_MAXDOUBLE)
    , integer(false)
    , defvalue(default_value)
    , digits(2)
    , inc_step(0.1)
    , inc_page(1)
    , add_slider(false)
    , _set_undo(true)
    , _no_leading_zeros(false)
    , _width_chars(-1)
{
}
 
bool ScalarParam::param_readSVGValue(char const * const strvalue)
{
    double newval;
    unsigned int success = sp_svg_number_read_d(strvalue, &newval);
    if (success == 1) {
        param_set_value(newval);
        return true;
    }
    return false;
}
 
Glib::ustring ScalarParam::param_getSVGValue() const
{
    Inkscape::SVGOStringStream os;
    os << value;
    return os.str();
}
 
Glib::ustring ScalarParam::param_getDefaultSVGValue() const
{
    Inkscape::SVGOStringStream os;
    os << defvalue;
    return os.str();
}
 
void ScalarParam::param_set_default() { param_set_value(defvalue); }
 
void ScalarParam::param_update_default(double const default_value) { defvalue = default_value; }
 
void ScalarParam::param_update_default(char const * const default_value)
{
    double newval;
    unsigned int success = sp_svg_number_read_d(default_value, &newval);
    if (success == 1) {
        param_update_default(newval);
    }
}
 
void ScalarParam::param_transform_multiply(Geom::Affine const &postmul, bool set)
{
    // Check if proportional stroke-width scaling is on
    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
    bool transform_stroke = prefs ? prefs->getBool("/options/transform/stroke", true) : true;
    if (transform_stroke || set) {
        param_set_value(value * postmul.descrim());
        write_to_SVG();
    }
}
 
void ScalarParam::param_set_value(double const val)
{
    value = val;
    if (integer)
        value = round(value);
    if (value > max)
        value = max;
    if (value < min)
        value = min;
}
 
void ScalarParam::param_set_range(double const min, double const max)
{
    // if you look at client code, you'll see that many effects
    // has a tendency to set an upper range of Geom::infinity().
    // Once again, in gtk2, this is not a problem. But in gtk3,
    // widgets get allocated the amount of size they ask for,
    // leading to excessively long widgets.
    if (min >= -SCALARPARAM_G_MAXDOUBLE) {
        this->min = min;
    } else {
        this->min = -SCALARPARAM_G_MAXDOUBLE;
    }
    if (max <= SCALARPARAM_G_MAXDOUBLE) {
        this->max = max;
    } else {
        this->max = SCALARPARAM_G_MAXDOUBLE;
    }
    param_set_value(value); // reset value to see whether it is in ranges
}
 
void ScalarParam::param_make_integer(bool yes)
{
    integer = yes;
    digits = 0;
    inc_step = 1;
    inc_page = 10;
}
 
void ScalarParam::param_set_no_leading_zeros() {
    _no_leading_zeros = true;
}
 
void ScalarParam::param_set_width_chars(gint width_chars) {
    _width_chars = width_chars;
}
 
void ScalarParam::param_set_undo(bool set_undo) { _set_undo = set_undo; }
 
Gtk::Widget *ScalarParam::param_newWidget()
{
    if (widget_is_visible) {
        auto const rsu = Gtk::make_managed<UI::Widget::RegisteredScalar>(
            param_label, param_tooltip, param_key, *param_wr, param_effect->getRepr(), param_effect->getSPDoc());
        rsu->setValue(value);
        rsu->setDigits(digits);
        rsu->setIncrements(inc_step, inc_page);
        rsu->setRange(min, max);
        rsu->setProgrammatically = false;
        if (_no_leading_zeros) {
            rsu->setNoLeadingZeros();
        }
        if (_width_chars > 0) {
            rsu->setWidthChars(_width_chars);
        }
        if (add_slider) {
            rsu->addSlider();
        }
        if (_set_undo) {
            rsu->set_undo_parameters(_("Change scalar parameter"), INKSCAPE_ICON("dialog-path-effects"));
        }
        return rsu;
    } else {
        return nullptr;
    }
}
 
void ScalarParam::param_set_digits(unsigned digits) { this->digits = digits; }
 
void ScalarParam::param_set_increments(double step, double page)
{
    inc_step = step;
    inc_page = page;
}
 
} // namespace Inkscape::LivePathEffect
 
/*
  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 :