mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-15 18:15:52 +08:00
423 lines
16 KiB
C++
423 lines
16 KiB
C++
/*
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Copyright (c) 2008-2024 Jan W. Krieger (<jan@jkrieger.de>)
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This software is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License (LGPL) as published by
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the Free Software Foundation, either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License (LGPL) for more details.
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You should have received a copy of the GNU Lesser General Public License (LGPL)
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "jkqtcommon/jkqtpcsstools.h"
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#include "jkqtcommon/jkqtpstringtools.h"
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#include "jkqtcommon/jkqtpcodestructuring.h"
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#include <stdexcept>
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#include <QMetaEnum>
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#include <QSet>
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#include <QVector>
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JKQTPCSSParser::RawErrorTag_t JKQTPCSSParser::RawErrorTag={};
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JKQTPCSSParser::Token JKQTPCSSParser::peekNextToken(int *endPos)
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{
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// on "RETURN" fromm this function: reset to current status and store the new pos in oldPos (if !=nullptr)
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auto _final=JKQTPFinally(std::bind([&](JKQTPCSSParser* p, const Token oldToken, const int oldPos){
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if (endPos) *endPos=p->pos;
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p->CurrentToken=oldToken;
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p->pos=oldPos;
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}, this, CurrentToken, pos));
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QChar ch('\0');
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while(getCh(ch) && ch.isSpace()) {
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}
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static QString hexDigits="0123456789abcdefABCDEF";
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if (ch==QChar('\0')) return Token(Token::END);
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else if (ch==QChar(',')) return Token(Token::COMMA);
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else if (ch==QChar('(')) return Token(Token::LBRACKET);
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else if (ch==QChar(')')) return Token(Token::RBRACKET);
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else if (ch==QChar('/')) return Token(Token::SLASH);
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else if (ch==QChar('#')) {
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QString hex;
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while (peekCh(ch) && hexDigits.contains(ch)) {
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getCh(ch);
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hex+=ch;
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}
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if (hex.size()==0) throw std::runtime_error(QString("did not find HEX digits after a HASH '#' at pos.%1!").arg(pos).toStdString());
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return Token(hex,Token::HEXSTRING);
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} else if (ch.isDigit() || ch=='+' || ch=='-' || ch=='.') {
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QString num=ch;
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QString unit;
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while (peekCh(ch) && (ch.isDigit() || ch=='.')) {
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getCh(ch);
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num+=ch;
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}
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if (ch.isLetter() || ch=='\xB0' || ch=='%') {
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unit=ch;
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getCh(ch);
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while (peekCh(ch) && (ch.isLetter() || ch=='\xB0' || ch=='%')) {
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getCh(ch);
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unit+=ch;
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}
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}
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return Token(num.toDouble(), unit);
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} else if (ch.isLetter()) {
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QString name=ch;
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while (peekCh(ch) && (ch.isLetterOrNumber() ||ch=='-' || ch=='_'|| ch=='.')) {
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getCh(ch);
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name+=ch;
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}
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return Token(name);
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} else {
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throw std::runtime_error(QString("found unexpected character '%1' at pos.%2").arg(ch).arg(pos).toStdString());
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}
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return Token::END;
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}
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JKQTPCSSParser::Token JKQTPCSSParser::getToken()
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{
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int newpos=pos;
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const auto newT=peekNextToken(&newpos);
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pos=newpos;
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return CurrentToken=newT;
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}
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JKQTPExpected<JKQTPCSSParser::NumberWithUnit, JKQTPCSSParser::GeneralError> JKQTPCSSParser::parseNumberWithUnit(bool get)
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{
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NumberWithUnit num = NumberWithUnit(0.0,"");
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if (get) getToken();
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if (CurrentToken.is(Token::TokenType::NUMBER)) {
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num=NumberWithUnit(CurrentToken.NumberValue, CurrentToken.StringValue);
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} else {
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return {JKQTPUnexpected, UnexpectedTokenError(Token::NUMBER, CurrentToken, pos) };
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}
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return { num };
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}
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JKQTPExpected<QColor, JKQTPCSSParser::GeneralError> JKQTPCSSParser::parseColor(bool get)
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{
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QColor col=Qt::black;
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if (get) getToken();
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if (CurrentToken.is(Token::TokenType::HEXSTRING)) {
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const QString hex=CurrentToken.StringValue;
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if (hex.size()==3) {
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const int r=QString(hex[0]).toInt(nullptr, 16);
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const int g=QString(hex[1]).toInt(nullptr, 16);
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const int b=QString(hex[2]).toInt(nullptr, 16);
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col=QColor::fromRgb(r*16+r,g*16+g,b*16+b);
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} else if (hex.size()==4) {
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const int r=QString(hex[0]).toInt(nullptr, 16);
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const int g=QString(hex[1]).toInt(nullptr, 16);
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const int b=QString(hex[2]).toInt(nullptr, 16);
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const int a=QString(hex[3]).toInt(nullptr, 16);
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col=QColor::fromRgb(r*16+r,g*16+g,b*16+b,a*16+a);
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} else if (hex.size()==6) {
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col=QColor::fromRgb(hex.mid(0,2).toInt(nullptr, 16),hex.mid(2,2).toInt(nullptr, 16),hex.mid(4,2).toInt(nullptr, 16));
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} else if (hex.size()==8) {
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col=QColor::fromRgb(hex.mid(0,2).toInt(nullptr, 16),hex.mid(2,2).toInt(nullptr, 16),hex.mid(4,2).toInt(nullptr, 16),hex.mid(6,2).toInt(nullptr, 16));
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} else {
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return {JKQTPUnexpected, UnconvertobleError("#"+hex, "HEX-RGB value", pos) };
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}
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} else if (CurrentToken.is(Token::TokenType::NAME)) {
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static QMap<QString,QPair<int,int> > rgbFuncs={
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{"rgb", QPair<int,int>(3,4)},
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{"rgba",QPair<int,int>(4,4)},
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{"hsl",QPair<int,int>(3,4)},
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{"hsv",QPair<int,int>(3,4)},
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{"gray",QPair<int,int>(1,2)},
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{"grey",QPair<int,int>(1,2)},
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{"red",QPair<int,int>(1,2)},
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{"green",QPair<int,int>(1,2)},
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{"blue",QPair<int,int>(1,2)}
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};
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const QString func=CurrentToken.getNormString();
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if (rgbFuncs.contains(func)) {
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int nextPos=pos;
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const auto nextT=peekNextToken(&nextPos);
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if (nextT.is(Token::END)) {
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getToken();
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return jkqtp_lookupQColorName(func);
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} else if (!nextT.is(Token::LBRACKET)) {
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bool found=false;
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col=jkqtp_lookupQColorName(func, false, &found);
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if (!found) {
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getToken();
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return {JKQTPUnexpected, UnexpectedTokenError(func, Token::LBRACKET, CurrentToken, pos) };
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} else return { col };
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}
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getToken();
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const int minParams=rgbFuncs[func].first;
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const int maxParams=rgbFuncs[func].second;
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QList<double> params;
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getToken();
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while (CurrentToken.is(Token::NUMBER)) {
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const auto num=parseNumberWithUnit(false);
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if (!num.has_value()) return {JKQTPUnexpected, UnexpectedTermError(func, "number with unit", CurrentToken, pos) };
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if (params.size()==0 && (func=="hsl" || func=="hsv")) params.append(num.value().normHueNumber());
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else {
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if ((minParams!=maxParams && params.size()==maxParams-1) || minParams==4) params.append(jkqtp_bounded(0.0,num.value().normNumber(),1.0));
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else params.append(num.value().normRGBNumber());
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}
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getToken();
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if (CurrentToken.is(Token::COMMA) || CurrentToken.is(Token::SLASH)) getToken();
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}
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if (!CurrentToken.is(Token::RBRACKET) && !CurrentToken.is(Token::END)) return {JKQTPUnexpected, UnexpectedTokenError(func, Token::RBRACKET, CurrentToken, pos) };
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if (params.size()>=minParams && params.size()<=maxParams) {
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if (func=="rgb" || func=="rgba") {
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col=QColor::fromRgbF(params[0],params[1],params[2],params.value(3,1));
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} else if (func=="hsl") {
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col=QColor::fromHslF(params[0],params[1],params[2],params.value(3,1));
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} else if (func=="hsv") {
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col=QColor::fromHsvF(params[0],params[1],params[2],params.value(3,1));
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} else if (func=="gray" || func=="grey") {
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col=QColor::fromRgbF(params[0],params[0],params[0],params.value(1,1));
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} else if (func=="red") {
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col=QColor::fromRgbF(params[0],0.0,0.0,params.value(1,1));
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} else if (func=="green") {
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col=QColor::fromRgbF(0.0,params[0],0.0,params.value(1,1));
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} else if (func=="blue") {
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col=QColor::fromRgbF(0.0,0.0,params[0],params.value(1,1));
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}
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} else return {JKQTPUnexpected, WrongNumberOfArgumentError(func, params.size(), minParams, maxParams, pos) };
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} else {
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col=jkqtp_lookupQColorName(CurrentToken.StringValue);
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}
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} else {
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return {JKQTPUnexpected, UnexpectedTokenError(Token::NUMBER, CurrentToken, pos) };
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}
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return { col };
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}
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JKQTPExpected<QGradient, JKQTPCSSParser::GeneralError> JKQTPCSSParser::parseGradient(bool get)
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{
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QGradient grad=QGradient();
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if (get) getToken();
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#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
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static QMap<QString,QGradient::Preset> s_GradientPresets = []() {
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QMap<QString,QGradient::Preset> m;
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for (int i=1; i<QMetaEnum::fromType<QGradient::Preset>().keyCount(); i++) {
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const QString id=QString(QMetaEnum::fromType<QGradient::Preset>().valueToKey(static_cast<QGradient::Preset>(i))).toLower().trimmed().simplified();
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if (id.size()>0) m[id]=static_cast<QGradient::Preset>(i);
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}
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return m;
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}();
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#endif
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const QString func=CurrentToken.StringValue.trimmed().simplified().toLower();
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if (CurrentToken.is(Token::TokenType::NAME) && func=="linear-gradient") {
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QGradientStops colorStops;
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double alphaDeg=180; // 0 = bottom->top angle like clock-pointer
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// 90 = left->right
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// 180 = top->bottom
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// 270 = right->left
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getToken();
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if (!CurrentToken.is(Token::LBRACKET)) return {JKQTPUnexpected, UnexpectedTokenError(func, Token::LBRACKET, CurrentToken, pos) };
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getToken();
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if (CurrentToken.isNormString("to")) {
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QStringList capDir;
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static QSet<QString> allowedDirs={"left","right","top","bottom"};
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while (getToken().is(Token::NAME)) {
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const QString ns=CurrentToken.getNormString();
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if (allowedDirs.contains(ns)) {
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capDir.append(ns);
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} else {
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return {JKQTPUnexpected, UnexpectedTermError(func, "direction specifier [left|right|top|bottom] after 'to'", CurrentToken, pos) };
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}
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}
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if (capDir.size()==1 || (capDir.size()==2 && capDir[1].isEmpty())) {
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if (capDir[0]=="left") alphaDeg=270;
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else if (capDir[0]=="right") alphaDeg=90;
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else if (capDir[0]=="top") alphaDeg=0;
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else if (capDir[0]=="bottom") alphaDeg=180;
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} else if (capDir.size()==2) {
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if (capDir[0]=="top"||capDir[0]=="bottom") qSwap(capDir[0],capDir[1]);
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if (capDir[0]=="left" && capDir[1]=="top") alphaDeg=270+45;
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else if (capDir[0]=="left" && capDir[1]=="bottom") alphaDeg=270-45;
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else if (capDir[0]=="right" && capDir[1]=="top") alphaDeg=90-45;
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else if (capDir[0]=="right" && capDir[1]=="bottom") alphaDeg=90+45;
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} else {
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return {JKQTPUnexpected, GeneralError(func, "at most two directions allowed after 'to', but found "+QString::number(capDir.size()), pos) };
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}
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if (!CurrentToken.is(Token::COMMA)) return {JKQTPUnexpected, UnexpectedTokenError(func, Token::COMMA, CurrentToken, pos) };
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//getToken();
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} if (CurrentToken.is(Token::NUMBER)) {
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auto angle=parseNumberWithUnit(false);
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alphaDeg=angle.value().normNumber();
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getToken();
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}
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// alphaDeg 0 90 180 270
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// sin 0 1 0 -1
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// cos 1 0 -1 0
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// up right down left
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const double dx=jkqtp_roundToDigits(0.5*sin(alphaDeg/180.0*M_PI),10);
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const double dy=jkqtp_roundToDigits(-0.5*cos(alphaDeg/180.0*M_PI),10);
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QLinearGradient lgrad(0.5-dx,0.5-dy,0.5+dx,0.5+dy);
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lgrad.setCoordinateMode(QGradient::ObjectBoundingMode);
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bool done=false;
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while (!done) {
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QGradientStop stop;
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const auto col=parseColor(true);
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if (!col.has_value()) return {JKQTPUnexpected, UnexpectedTermError(func, "color specifier", CurrentToken, pos) };
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stop.second=col.value();
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stop.first=-1;
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getToken();
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if (CurrentToken.is(Token::NUMBER)) {
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if (CurrentToken.StringValue!="%") return {JKQTPUnexpected, UnexpectedTermError(func, "percentage value", CurrentToken, pos) };
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stop.first=CurrentToken.NumberValue/100.0;
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getToken();
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}
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colorStops<<stop;
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if (CurrentToken.is(Token::RBRACKET) || CurrentToken.is(Token::END)) {
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done=true;
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}
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}
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if (colorStops.size()>0) {
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// normalize colorStop positions
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if (colorStops.first().first<0) colorStops.first().first=0;
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if (colorStops.size()>1) {
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if (colorStops.last().first<0) colorStops.last().first=1.0;
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}
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int i=1;
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while (i<colorStops.size()) {
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if(colorStops[i].first<0) {
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const double lastStop=colorStops[i-1].first;
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const int lastI=i-1;
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while (colorStops[i].first<0) i++;
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const double endStop=colorStops[i].first;
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const int cnt=i-lastI-1;
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const double delta=(endStop-lastStop)/static_cast<double>(cnt+1);
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for (int j=lastI+1; j<i; j++) {
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colorStops[j].first=lastStop+static_cast<double>(j-lastI)*delta;
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}
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}
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i++;
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}
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lgrad.setStops(colorStops);
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grad=lgrad;
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}
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#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
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} else if (CurrentToken.isNormStringAnyOf(s_GradientPresets.keys())) {
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grad=QGradient(s_GradientPresets[CurrentToken.getNormString()]);
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grad.setCoordinateMode(QGradient::ObjectBoundingMode);
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#endif
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} else {
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return {JKQTPUnexpected, UnexpectedTermError("supported gradient-function [linear-gradient|] or predefined gradient name", CurrentToken, pos) };
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}
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return { grad };
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}
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JKQTPCSSParser::JKQTPCSSParser(const QString &text_):
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CurrentToken(Token::TokenType::END), text(text_), pos(0)
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{
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}
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QString JKQTPCSSParser::Token::toString(TokenType type)
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{
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switch(type) {
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case END: return "END";
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case NAME: return "NAME";
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case NUMBER: return "NUMBER";
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case HEXSTRING: return "HEXSTRING";
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case LBRACKET: return "LBRACKET";
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case RBRACKET: return "RBRACKET";
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case COMMA: return "COMMA";
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case SLASH: return "SLASH";
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}
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return "???";
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}
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JKQTPCSSParser::Token::Token():
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type(TokenType::END), StringValue(""), NumberValue(0.0)
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{
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}
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JKQTPCSSParser::Token::Token(TokenType type):
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type(type), StringValue(""), NumberValue(0.0)
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{
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switch(type) {
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case LBRACKET: StringValue="("; break;
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case RBRACKET: StringValue=")"; break;
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case COMMA: StringValue=","; break;
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default: break;
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}
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}
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JKQTPCSSParser::Token::Token(double num, const QString &unit_):
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type(NUMBER), StringValue(unit_), NumberValue(num)
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{
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}
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JKQTPCSSParser::Token::Token(const QString &str, TokenType type_):
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type(type_), StringValue(str), NumberValue(0.0)
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{
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if (type_==NUMBER) NumberValue=str.toDouble();
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if (type_==HEXSTRING) NumberValue=str.toInt(nullptr,16);
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}
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QString JKQTPCSSParser::Token::toString() const
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{
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QString s=toString(type);
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if (type==NUMBER) s+= " ["+QString::number(NumberValue, 'f')+"]";
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else if (StringValue.size()>0) s+= " ["+StringValue+"]";
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return s;
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}
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JKQTPCSSParser::NumberWithUnit JKQTPCSSParser::readNumberWithUnit(const QString &prog)
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{
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JKQTPCSSParser parser(prog);
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const auto res= parser.parseNumberWithUnit(true);
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if (res.has_value()) return res.value();
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else throw std::runtime_error(res.error().error.toStdString());
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}
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QColor JKQTPCSSParser::readColor(const QString &prog)
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{
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JKQTPCSSParser parser(prog);
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const auto res= parser.parseColor(true);
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if (res.has_value()) return res.value();
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else throw std::runtime_error(res.error().error.toStdString());
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}
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QGradient JKQTPCSSParser::readGradient(const QString &prog)
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{
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JKQTPCSSParser parser(prog);
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const auto res= parser.parseGradient(true);
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if (res.has_value()) return res.value();
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else throw std::runtime_error(res.error().error.toStdString());
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}
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