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* ********************************************************************************
* This file is part of the LibreCAD project, a 2D CAD program
*
* Copyright (C) 2025 LibreCAD.org
* Copyright (C) 2025 sand1024
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* ********************************************************************************
*/
#include "lc_coordinates_parser.h"
#include <QString>
#include "lc_convert.h"
#include "lc_graphicviewport.h"
#include "rs_graphicview.h"
#include "rs_math.h"
LC_CoordinatesParser::LC_CoordinatesParser(RS_GraphicView* gview):m_graphicView{gview} {}
RS_CoordinateEvent LC_CoordinatesParser::parseCoordinate(const QString& inputStr, bool &stringContainsCoordinate) {
RS_CoordinateEvent invalid(RS_Vector(false));
stringContainsCoordinate = true;
// handle quick shortcuts for absolute/current origins:
if (inputStr.length() == 1) {
switch (inputStr[0].toLatin1()) {
case '0': {
RS_Vector ucs0 = RS_Vector(0, 0, 0);
RS_Vector wcs0 = toWCS(ucs0);
return RS_CoordinateEvent(wcs0, true, false);
}
case '.':
case ',': {
RS_Vector wcs0 = m_graphicView->getViewPort()->getRelativeZero();
return RS_CoordinateEvent(wcs0, false, true);
}
default: /* NO OP */
stringContainsCoordinate = false;
return invalid;
}
}
bool wcsCoordinates = inputStr.at(0) == '!';
if (wcsCoordinates) {
// proceed absolute wcs coordinates
QString candidate = inputStr.mid(1);
bool isCartesian = inputStr.contains(',');
if (isCartesian) {
qsizetype separatorPos = candidate.indexOf(',');
bool ok1{false}, ok2{false};
double x = RS_Math::eval(LC_Convert::updateForFraction(candidate.left(separatorPos)), &ok1);
double y = RS_Math::eval(LC_Convert::updateForFraction(candidate.mid(separatorPos + 1)), &ok2);
if (ok1 && ok2) {
const RS_Vector& wcsCoordinate = RS_Vector(x, y);
return RS_CoordinateEvent(wcsCoordinate);
}
return invalid;
}
bool isPolar = candidate.contains('<');
if (isPolar) {
// proceed absolute polar coordinates
qsizetype separatorPos = candidate.indexOf('<');
bool ok1{false}, ok2{false};
double distance = RS_Math::eval(LC_Convert::updateForFraction(candidate.left(separatorPos)), &ok1);
const QString& angleStr = candidate.mid(separatorPos + 1);
double angleDegrees = LC_Convert::evalAngleValue(angleStr, ok2);
if (ok1 && ok2) {
double wcsAngle = RS_Math::deg2rad(angleDegrees); // fixme - sand - check whether angle base should be considered!!
RS_Vector wcsCoordinate = RS_Vector(distance, wcsAngle);
return RS_CoordinateEvent(wcsCoordinate);
}
return invalid;
}
return invalid;
}
bool absoluteCoordinates = inputStr.at(0) != '@';
bool isCartesian = inputStr.contains(',');
if (isCartesian) {
qsizetype separatorPos = inputStr.indexOf(',');
if (absoluteCoordinates) {
// absolute cartesian coordinates
bool ok1{false}, ok2{false};
double x = RS_Math::eval(LC_Convert::updateForFraction(inputStr.left(separatorPos)), &ok1);
double y = RS_Math::eval(LC_Convert::updateForFraction(inputStr.mid(separatorPos + 1)), &ok2);
if (ok1 && ok2) {
const RS_Vector& ucsCoordinate = RS_Vector(x, y);
RS_Vector wcsCoordinate = toWCS(ucsCoordinate);
return RS_CoordinateEvent(wcsCoordinate);
}
return invalid;
}
// relative cartesian coordinates
bool ok1{false}, ok2{false};
double x = RS_Math::eval(LC_Convert::updateForFraction(inputStr.mid(1, separatorPos - 1)), &ok1);
double y = RS_Math::eval(LC_Convert::updateForFraction(inputStr.mid(separatorPos + 1)), &ok2);
if (ok1 && ok2) {
const RS_Vector& ucsOffset = RS_Vector(x, y);
const RS_Vector ucsRelZero = toUCS(m_graphicView->getViewPort()->getRelativeZero());
const RS_Vector ucsCoordinate = ucsOffset + ucsRelZero;
const RS_Vector& wcsCoordinate = toWCS(ucsCoordinate);
return RS_CoordinateEvent(wcsCoordinate);
}
return invalid;
}
// try to handle polar coordinate input:
bool isPolar = inputStr.contains('<');
if (isPolar) {
qsizetype separatorPos = inputStr.indexOf('<');
if (absoluteCoordinates) {
// handle absolute polar coordinate input:
bool ok1{false}, ok2{false};
double ucsDistance = RS_Math::eval(LC_Convert::updateForFraction(inputStr.left(separatorPos)), &ok1);
const QString& angleStr = inputStr.mid(separatorPos + 1);
double ucsBasisAngleDegrees = LC_Convert::evalAngleValue(angleStr, ok2);
if (ok1 && ok2) {
double ucsBasisAngleRad = RS_Math::deg2rad(ucsBasisAngleDegrees);
double ucsAngle = toAbsUCSAngle(ucsBasisAngleRad);
RS_Vector ucsCoordinate{RS_Vector::polar(ucsDistance, ucsAngle)};
RS_Vector wcsCoordinate = toWCS(ucsCoordinate);
return RS_CoordinateEvent(wcsCoordinate);
}
return invalid;
}
// handle relative polar coordinate input:
qsizetype commaPos = inputStr.indexOf('<');
bool ok1{false}, ok2{false};
double ucsDistance = RS_Math::eval(LC_Convert::updateForFraction(inputStr.mid(1, commaPos - 1)), &ok1);
const QString& angleStr = inputStr.mid(commaPos + 1);
double ucsBasisAngleDegrees = LC_Convert::evalAngleValue(angleStr, ok2);
if (ok1 && ok2) {
double ucsBasisAngleRad = RS_Math::deg2rad(ucsBasisAngleDegrees);
double ucsAngle = toAbsUCSAngle(ucsBasisAngleRad);
RS_Vector ucsOffset = RS_Vector::polar(ucsDistance, ucsAngle);
const RS_Vector ucsRelZero = toUCS(m_graphicView->getViewPort()->getRelativeZero());
const RS_Vector ucsCoordinate = ucsOffset + ucsRelZero;
const RS_Vector& wcsCoordinate = toWCS(ucsCoordinate);
return RS_CoordinateEvent(wcsCoordinate);
}
return invalid;
}
stringContainsCoordinate = false;
return invalid;
}
RS_Vector LC_CoordinatesParser::toWCS(const RS_Vector &ucs) {
return m_graphicView->getViewPort()->toWorld(ucs);
}
RS_Vector LC_CoordinatesParser::toUCS(const RS_Vector &wcs) {
return m_graphicView->getViewPort()->toUCS(wcs);
}
double LC_CoordinatesParser::toAbsUCSAngle(double ucsBasisAngle) {
return m_graphicView->getViewPort()->toAbsUCSAngle(ucsBasisAngle);
}
double LC_CoordinatesParser::toWCSAngle(double ucsAngle) {
return m_graphicView->getViewPort()->toWorldAngle(ucsAngle);
}
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