renderObjectHighLighter.cc

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#include <QtWidgets>
 
#include "renderObjectHighLighter.hh"
 
RenderObjectHighlighter::RenderObjectHighlighter(QTextDocument *parent)
  : QSyntaxHighlighter(parent)
{
 init();
}
 
RenderObjectHighlighter::RenderObjectHighlighter(QTextEdit *parent)
: QSyntaxHighlighter(parent)
{
  init();
}
 
void RenderObjectHighlighter::init() {
   // Set the basic format styles
  vertexShaderFormat_.setBackground(Qt::green);
  vertexShaderFormat_.setFontWeight(QFont::Bold);
 
  vertexShaderStartExpression_ = QRegularExpression("---------------------vertex-shader--------------------");
  vertexShaderEndExpression_   = QRegularExpression("---------------------end-vertex-shader--------------------");
 
  geometryShaderFormat_.setBackground(Qt::blue);
  geometryShaderFormat_.setFontWeight(QFont::Bold);
 
  geometryShaderStartExpression_ = QRegularExpression("---------------------geometry-shader--------------------");;
  geometryShaderEndExpression_   = QRegularExpression("---------------------end-geometry-shader--------------------");;
 
 
  fragmentShaderFormat_.setBackground(Qt::red);
  fragmentShaderFormat_.setFontWeight(QFont::Bold);
 
  fragmentShaderStartExpression_ = QRegularExpression("---------------------fragment-shader--------------------");
  fragmentShaderEndExpression_   = QRegularExpression("---------------------end-fragment-shader--------------------");
 
  // match whole line containing the define
  defineFormat_.setForeground(Qt::green);
  defineFormat_.setFontWeight(QFont::Bold);
 
  // Single line comments
  singleLineCommentFormat_.setForeground(Qt::red);
 
  // Set the basic format styles
  keywordFormat_.setForeground(Qt::darkGreen);
  keywordFormat_.setFontWeight(QFont::Bold);
 
  // Define basic keywords
  keywordPatterns_ << "main" << "while" << "for" << "if" << "dot" << "sqrt" << "max" << "pow" << "return" << "normalize";
  keywordPatterns_ << "min" << "clamp" << "step";
 
  typeFormat_.setForeground(Qt::darkMagenta);
  typeFormat_.setFontWeight(QFont::Bold);
 
  // Types
  typePatterns_ << "in" << "out" << "mat3" << "mat4" << "vec2" << "vec3" << "vec4" << "float" << "double" <<"uniform" << "layout" ;
 
  update();
}
 
void RenderObjectHighlighter::update() {
 
  highlightingRules_.clear();
 
  HighlightingRule rule;
 
  // Define rule
  rule.pattern = QRegularExpression("(#define|#ifdef|#else|#endif|#ifndef).*");
  rule.format =  defineFormat_;
  highlightingRules_.append(rule);
 
  // version rule
  rule.pattern = QRegularExpression("#version.*");
  rule.format =  defineFormat_;
  highlightingRules_.append(rule);
 
  // Rule for single line comments
  rule.pattern = QRegularExpression("//[^\n]*");
  rule.format = singleLineCommentFormat_;
  highlightingRules_.append(rule);
 
  // Create Rules for keywords
  foreach (QString pattern, keywordPatterns_) {
    rule.pattern = QRegularExpression("\\b" + pattern + "\\b" );
    rule.format = keywordFormat_;
    highlightingRules_.append(rule);
  }
 
  // Create Rules for types
  foreach (QString pattern, typePatterns_ ) {
    rule.pattern = QRegularExpression("\\b" + pattern + "\\b" );
    rule.format = typeFormat_;
    highlightingRules_.append(rule);
  }
 
}
 
void RenderObjectHighlighter::highlightBlock(const QString &text)
{
 
  // Single word highlighting
  foreach (HighlightingRule rule, highlightingRules_) {
    QRegularExpression expression(rule.pattern);
    QRegularExpressionMatch match = expression.match(text);
    int index = match.capturedStart();
    while (index >= 0) {
      int length = match.capturedLength();
      setFormat(index, length, rule.format);
      match = expression.match(text, index + length);
      index = match.capturedStart();
    }
  }
 
  // Blockstate -1,0 : nothing
  // Blockstate  1   : vertexShader Code
  // Blockstate  2   : geometryShader Code
  // Blockstate  3   : fragment Shader Code
 
//  setCurrentBlockState(0);
//
//  // Vertex shader block
//  int startIndex = 0;
//  if (previousBlockState() != 1)
//    startIndex = text.indexOf(vertexShaderStartExpression_);
//
//  while (startIndex >= 0) {
//    int endIndex = text.indexOf(vertexShaderEndExpression_, startIndex);
//    int commentLength;
//    if (endIndex == -1) {
//      setCurrentBlockState(1);
//      commentLength = text.length() - startIndex;
//    } else {
//      commentLength = endIndex - startIndex + vertexShaderEndExpression_.matchedLength();
//    }
//    setFormat(startIndex, commentLength, vertexShaderFormat_);
//    startIndex = text.indexOf(vertexShaderStartExpression_, startIndex + commentLength);
//  }
//
//  // Fragment shader block
//  startIndex = 0;
//  if (previousBlockState() != 3)
//    startIndex = text.indexOf(fragmentShaderStartExpression_);
//
//  while (startIndex >= 0) {
//    int endIndex = text.indexOf(fragmentShaderEndExpression_, startIndex);
//    int commentLength;
//    if (endIndex == -1) {
//      setCurrentBlockState(3);
//      commentLength = text.length() - startIndex;
//    } else {
//      commentLength = endIndex - startIndex + fragmentShaderEndExpression_.matchedLength();
//    }
//    setFormat(startIndex, commentLength, fragmentShaderFormat_);
//    startIndex = text.indexOf(fragmentShaderStartExpression_, startIndex + commentLength);
//  }
 
}