Package com.github.sommeri.less4j.core.ast

Examples of com.github.sommeri.less4j.core.ast.Expression

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  public Expression evaluate(FunctionExpression input, List<Expression> parameters, Expression evaluatedParameter) {
    for (LessFunction function : functions) {
      if (function.canEvaluate(input, parameters)) {
        FunctionExpression inputClone = input.clone();
        List<Expression> parametersClone = ArraysUtils.deeplyClonedList(parameters);
        Expression evaluatedParameterClone = evaluatedParameter.clone();
        return fixResult(function.evaluate(inputClone, parametersClone, evaluatedParameterClone, new SafeLessProblem(problemsHandler, inputClone)), input);
      }
    }
    return new FaultyExpression(input);
  }
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abstract class MinMax extends AbtractMultiParameterMathFunction {

  @Override
  protected Expression evaluate(List<Expression> splitParameters, ProblemsHandler problemsHandler, FunctionExpression functionCall, HiddenTokenAwareTree token) {
    Iterator<Expression> expanded = expandLists(splitParameters).iterator();
    Expression next = expanded.next();
    while (expanded.hasNext() && next.getType()!=ASTCssNodeType.NUMBER) {
      next = expanded.next();
    }
   
    if (next.getType()!=ASTCssNodeType.NUMBER) {
      return new FunctionExpression(token, getName(), null);
    }
   
    NumberExpression result = (NumberExpression) next;
    while (expanded.hasNext()) {
      next = expanded.next();
      if (next.getType()==ASTCssNodeType.NUMBER) {
        NumberExpression nextNum = (NumberExpression) next;
        if (!canCompare(result, nextNum)) {
          problemsHandler.errorIncompatibleTypesCompared(functionCall, result.getSuffix(), nextNum.getSuffix());
          return new FaultyExpression(functionCall);
        }
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      return false;

    if (!utils.selectorOperatorsEquals(att1.getOperator(), att2.getOperator()))
      return false;

    Expression v1 = att1.getValue();
    Expression v2 = att2.getValue();

    if (v1 == null || v2 == null)
      return v1 == null && v2 == null;

    //extend keyword is "smart". It knows that [attribute=something] is the same as [attribute='something'] and the same [attribute="something"]
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    return MathFunctions.LENGTH;
  }

  @Override
  protected Expression evaluate(List<Expression> splitParameters, ProblemsHandler problemsHandler, FunctionExpression call, HiddenTokenAwareTree token) {
    Expression expression = splitParameters.get(0);
    if (expression.getType()!=ASTCssNodeType.LIST_EXPRESSION)
      return new NumberExpression(call.getUnderlyingStructure(), Double.valueOf(1), "", null, Dimension.NUMBER);
   
    ListExpression list = (ListExpression) expression;
    int length = list.getExpressions().size();
    return new NumberExpression(call.getUnderlyingStructure(), Double.valueOf(length), "", null, Dimension.NUMBER);
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    }
  }

  public String extractFilename(Expression urlInput, ProblemsHandler problemsHandler, Configuration configuration) {
    ExpressionEvaluator expressionEvaluator = new ExpressionEvaluator(problemsHandler, configuration);
    Expression urlExpression = expressionEvaluator.evaluate(urlInput);

    if (urlExpression.getType() != ASTCssNodeType.FUNCTION)
      return toJavaFileSeparator(contentToString(urlExpression));

    //this is the only place in the compiler that can interpret the url function
    FunctionExpression function = (FunctionExpression) urlExpression;
    if (!"url".equals(function.getName().toLowerCase()))
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    ASTManipulator manipulator = new ASTManipulator();
    //variables are not supposed to be there now
    ExpressionEvaluator expressionEvaluator = new ExpressionEvaluator(problemsHandler, configuration);

    if (node instanceof Expression) {
      Expression value = expressionEvaluator.evaluate((Expression) node);
      manipulator.replace(node, value);
    } else {
      List<? extends ASTCssNode> childs = node.getChilds();
      for (ASTCssNode kid : childs) {
        switch (kid.getType()) {
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  @Override
  public Expression evaluate(List<Expression> parameters, ProblemsHandler problemsHandler, FunctionExpression call, Expression evaluatedParameter) {
    if (parameters.size()>1)
      problemsHandler.wrongNumberOfArgumentsToFunctionMin(call.getParameter(), call.getName(), 1);

    Expression parameter = parameters.get(0);
    if (parameter.getType() == ASTCssNodeType.NUMBER) {
      return evaluate((NumberExpression) parameter);
    }

    if (parameter.getType() == ASTCssNodeType.STRING_EXPRESSION) {
      return evaluate((CssString) parameter, problemsHandler);
    }

    problemsHandler.mathFunctionParameterNotANumberWarn(MathFunctions.PERCENTAGE, parameter);
    return createResult(Double.NaN, parameter.getUnderlyingStructure());
  }
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  @Override
  public final Expression evaluate(List<Expression> parameters, ProblemsHandler problemsHandler, FunctionExpression call, Expression evaluatedParameter) {
    if (parameters.size()>1)
      problemsHandler.wrongNumberOfArgumentsToFunctionMin(call.getParameter(), call.getName(), 1);

    Expression iParameter = parameters.get(0);
    if (iParameter.getType() != ASTCssNodeType.NUMBER) {
      problemsHandler.wrongArgumentTypeToFunction(iParameter, getName(), iParameter.getType(), ASTCssNodeType.NUMBER);
      return new FaultyExpression(iParameter);
    }

    NumberExpression parameter = (NumberExpression) iParameter;
    HiddenTokenAwareTree parentToken = parameter.getUnderlyingStructure();
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  public Expression getValue(Variable variable) {
    return getValue(variable.getName());
  }

  public Expression getValue(String name) {
    Expression value = getLocalValue(name);

    if (value == null && hasParent())
      value = getParent().getValue(name);

    return value;
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    FunctionExpression function = (FunctionExpression) kid;
    String name = function.getName();
    if (!"url".equals(name == null ? null : name.toLowerCase()))
      return false;
   
    Expression parameter = function.getParameter().splitByComma().get(0);
    if (parameter.getType()!=ASTCssNodeType.STRING_EXPRESSION)
      return false;
   
    CssString stringParameter = (CssString)parameter;
    return "".equals(stringParameter.getQuoteType());
  }
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Related Classes of com.github.sommeri.less4j.core.ast.Expression

  • com.github.sommeri.less4j.core.compiler.expressions.AbstractSingleValueMathFunction
  • com.github.sommeri.less4j.core.compiler.expressions.AbstractTypeFunction
  • com.github.sommeri.less4j.core.compiler.expressions.CustomFunctions
  • com.github.sommeri.less4j.core.compiler.expressions.E
  • com.github.sommeri.less4j.core.compiler.expressions.Escape
  • com.github.sommeri.less4j.core.compiler.expressions.ExpressionEvaluator
  • com.github.sommeri.less4j.core.compiler.expressions.Format
  • com.github.sommeri.less4j.core.compiler.expressions.IsUnit
  • com.github.sommeri.less4j.core.compiler.expressions.Length
  • com.github.sommeri.less4j.core.compiler.expressions.MinMax
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