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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#ifndef _LUMINA_SYNTAX_HIGHLIGHER_CPP_H
#define _LUMINA_SYNTAX_HIGHLIGHER_CPP_H
#include <QSyntaxHighlighter>
#include <QTextDocument>
#include <QTextCharFormat>
#include <QString>
#include <QSettings>
#include <QDebug>
//Simple syntax rules
struct SyntaxRule{
QRegExp pattern;
QTextCharFormat format;
};
//Complicated/multi-line rules
struct SyntaxRuleSplit{
QRegExp startPattern, endPattern;
QTextCharFormat format;
};
class Custom_Syntax : public QSyntaxHighlighter{
Q_OBJECT
private:
QSettings *settings;
QString lasttype;
QVector<SyntaxRule> rules;
QVector<SyntaxRuleSplit> splitrules;
public:
Custom_Syntax(QSettings *set, QTextDocument *parent = 0) : QSyntaxHighlighter(parent){
settings = set;
}
~Custom_Syntax(){}
static QStringList availableRules();
static QStringList knownColors();
static void SetupDefaultColors(QSettings *settings);
static QString ruleForFile(QString filename);
void loadRules(QString type);
void reloadRules(){
loadRules(lasttype);
}
protected:
void highlightBlock(const QString &text){
//qDebug() << "Highlight Block:" << text;
//Now look for any multi-line patterns (starting/continuing/ending)
int start = 0;
int splitactive = previousBlockState();
if(splitactive>splitrules.length()-1){ splitactive = -1; } //just in case
while(start>=0 && start<=text.length()-1){
//qDebug() << "split check:" << start << splitactive;
if(splitactive>=0){
//Find the end of the current rule
int end = splitrules[splitactive].endPattern.indexIn(text, start);
if(end==-1){
//qDebug() << "Highlight to end of line:" << text << start;
//rule did not finish - apply to all
if(start>0){ setFormat(start-1, text.length()-start+1, splitrules[splitactive].format); }
else{ setFormat(start, text.length()-start, splitrules[splitactive].format); }
break; //stop looking for more multi-line patterns
}else{
//Found end point within the same line
//qDebug() << "Highlight to particular point:" << text << start << end;
int len = end-start+splitrules[splitactive].endPattern.matchedLength();
if(start>0){ start--; len++; } //need to include the first character as well
setFormat(start, len , splitrules[splitactive].format);
start+=len; //move pointer to the end of handled range
splitactive = -1; //done with this rule
}
} //end check for end match
//Look for the start of any new split rule
for(int i=0; i<splitrules.length() && splitactive<0; i++){
//qDebug() << "Look for start of split rule:" << splitrules[i].startPattern << splitactive;
int newstart = splitrules[i].startPattern.indexIn(text,start);
if(newstart>=start){
//qDebug() << "Got Start of split rule:" << start << newstart << text;
splitactive = i;
start = newstart+1;
if(start>=text.length()-1){
//qDebug() << "Special case: start now greater than line length";
//Need to apply highlighting to this section too - start matches the end of the line
setFormat(start-1, text.length()-start+1, splitrules[splitactive].format);
}
}
}
if(splitactive<0){ break; } //no other rules found - go ahead and exit the loop
}
setCurrentBlockState(splitactive);
//Do all the single-line patterns
for(int i=0; i<rules.length(); i++){
QRegExp patt(rules[i].pattern); //need a copy of the rule's pattern (will be changing it below)
int index = patt.indexIn(text);
if(splitactive>=0 || index<start){ continue; } //skip this one - falls within a multi-line pattern above
while(index>=0){
int len = patt.matchedLength();
if(format(index)==currentBlock().charFormat()){ setFormat(index, len, rules[i].format); } //only apply highlighting if not within a section already
index = patt.indexIn(text, index+len); //go to the next match
}
}//end loop over normal (single-line) patterns
}
};
#endif
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