Examples with PushStream org.apache.sling.scripting.sightly.impl.compiler.PushStream used on opensource projects

Example 6 with PushStream

use of org.apache.sling.scripting.sightly.impl.compiler.PushStream in project sling by apache.

the class CallPlugin method invoke.

@Override
public PluginInvoke invoke(final Expression expression, final PluginCallInfo callInfo, final CompilerContext compilerContext) {
    if (callInfo.getArguments().length > 0) {
        throw new SightlyCompilerException("Call plugin should have no arguments.", "data-sly-call." + callInfo.getArguments()[0]);
    }
    return new DefaultPluginInvoke() {

        @Override
        public void beforeChildren(PushStream stream) {
            String templateVar = compilerContext.generateVariable("templateVar");
            String argsVar = compilerContext.generateVariable("templateOptions");
            MapLiteral args = new MapLiteral(expression.getOptions());
            stream.write(new VariableBinding.Start(templateVar, expression.getRoot()));
            stream.write(new VariableBinding.Start(argsVar, args));
            stream.write(new Procedure.Call(templateVar, argsVar));
            stream.write(VariableBinding.END);
            stream.write(VariableBinding.END);
            //ignoring everything else
            Patterns.beginStreamIgnore(stream);
        }

        @Override
        public void afterChildren(PushStream stream) {
            Patterns.endStreamIgnore(stream);
        }
    };
}

Example 7 with PushStream

use of org.apache.sling.scripting.sightly.impl.compiler.PushStream in project sling by apache.

the class ElementPlugin method invoke.

@Override
public PluginInvoke invoke(final Expression expression, final PluginCallInfo callInfo, final CompilerContext compilerContext) {
    return new DefaultPluginInvoke() {

        private final ExpressionNode node = adjustContext(compilerContext, expression, MarkupContext.ELEMENT_NAME, ExpressionContext.ELEMENT).getRoot();

        private String tagVar = compilerContext.generateVariable("tagVar");

        @Override
        public void beforeElement(PushStream stream, String tagName) {
            stream.write(new VariableBinding.Start(tagVar, node));
        }

        @Override
        public void beforeTagOpen(PushStream stream) {
            stream.write(new Conditional.Start(tagVar, true));
            stream.write(new OutText("<"));
            stream.write(new OutputVariable(tagVar));
            stream.write(Conditional.END);
            stream.write(new Conditional.Start(tagVar, false));
        }

        @Override
        public void beforeAttributes(PushStream stream) {
            stream.write(Conditional.END);
        }

        @Override
        public void beforeTagClose(PushStream stream, boolean isSelfClosing) {
            if (!isSelfClosing) {
                stream.write(new Conditional.Start(tagVar, true));
                stream.write(new OutText("</"));
                stream.write(new OutputVariable(tagVar));
                stream.write(new OutText(">"));
                stream.write(Conditional.END);
            }
            stream.write(new Conditional.Start(tagVar, false));
        }

        @Override
        public void afterTagClose(PushStream stream, boolean isSelfClosing) {
            stream.write(Conditional.END);
        }

        @Override
        public void afterElement(PushStream stream) {
            stream.write(VariableBinding.END);
        }
    };
}

Example 8 with PushStream

use of org.apache.sling.scripting.sightly.impl.compiler.PushStream in project sling by apache.

the class IncludePlugin method invoke.

@Override
public PluginInvoke invoke(final Expression expression, final PluginCallInfo callInfo, final CompilerContext compilerContext) {
    return new DefaultPluginInvoke() {

        @Override
        public void beforeChildren(PushStream stream) {
            String includedContentVar = compilerContext.generateVariable("includedResult");
            String pathVar = compilerContext.generateVariable("includePath");
            stream.write(new VariableBinding.Start(pathVar, expression.getRoot()));
            stream.write(new VariableBinding.Start(includedContentVar, new RuntimeCall(RuntimeFunction.INCLUDE, new Identifier(pathVar), new MapLiteral(expression.getOptions()))));
            stream.write(new OutputVariable(includedContentVar));
            //end includedContentVar
            stream.write(VariableBinding.END);
            //end pathVar
            stream.write(VariableBinding.END);
            Patterns.beginStreamIgnore(stream);
        }

        @Override
        public void afterChildren(PushStream stream) {
            Patterns.endStreamIgnore(stream);
        }
    };
}

Example 9 with PushStream

use of org.apache.sling.scripting.sightly.impl.compiler.PushStream in project sling by apache.

the class ListPlugin method invoke.

@Override
public PluginInvoke invoke(final Expression expression, final PluginCallInfo callInfo, final CompilerContext compilerContext) {
    return new DefaultPluginInvoke() {

        private String listVariable = compilerContext.generateVariable("collectionVar");

        private String collectionSizeVar = compilerContext.generateVariable("size");

        @Override
        public void beforeElement(PushStream stream, String tagName) {
            stream.write(new VariableBinding.Start(listVariable, expression.getRoot()));
            stream.write(new VariableBinding.Start(collectionSizeVar, new UnaryOperation(UnaryOperator.LENGTH, new Identifier(listVariable))));
            stream.write(new Conditional.Start(collectionSizeVar, true));
        }

        @Override
        public void beforeChildren(PushStream stream) {
            String itemVariable = decodeItemVariable();
            String loopStatusVar = Syntax.itemLoopStatusVariable(itemVariable);
            String indexVariable = compilerContext.generateVariable("index");
            stream.write(new Loop.Start(listVariable, itemVariable, indexVariable));
            stream.write(new VariableBinding.Start(loopStatusVar, buildStatusObj(indexVariable, collectionSizeVar)));
        }

        @Override
        public void afterChildren(PushStream stream) {
            stream.write(VariableBinding.END);
            stream.write(Loop.END);
        }

        @Override
        public void afterElement(PushStream stream) {
            stream.write(Conditional.END);
            stream.write(VariableBinding.END);
            stream.write(VariableBinding.END);
        }

        private String decodeItemVariable() {
            String[] args = callInfo.getArguments();
            if (args.length > 0) {
                return args[0];
            }
            return Syntax.DEFAULT_LIST_ITEM_VAR_NAME;
        }

        private MapLiteral buildStatusObj(String indexVar, String sizeVar) {
            HashMap<String, ExpressionNode> obj = new HashMap<>();
            Identifier indexId = new Identifier(indexVar);
            BinaryOperation firstExpr = new BinaryOperation(BinaryOperator.EQ, indexId, NumericConstant.ZERO);
            BinaryOperation lastExpr = new BinaryOperation(BinaryOperator.EQ, indexId, new BinaryOperation(BinaryOperator.SUB, new Identifier(sizeVar), NumericConstant.ONE));
            obj.put(INDEX, indexId);
            obj.put(COUNT, new BinaryOperation(BinaryOperator.ADD, indexId, NumericConstant.ONE));
            obj.put(FIRST, firstExpr);
            obj.put(MIDDLE, new UnaryOperation(UnaryOperator.NOT, new BinaryOperation(BinaryOperator.OR, firstExpr, lastExpr)));
            obj.put(LAST, lastExpr);
            obj.put(ODD, parityCheck(indexId, NumericConstant.ZERO));
            obj.put(EVEN, parityCheck(indexId, NumericConstant.ONE));
            return new MapLiteral(obj);
        }

        private ExpressionNode parityCheck(ExpressionNode numericExpression, NumericConstant expected) {
            return new BinaryOperation(BinaryOperator.EQ, new BinaryOperation(BinaryOperator.REM, numericExpression, NumericConstant.TWO), expected);
        }
    };
}

Example 10 with PushStream

use of org.apache.sling.scripting.sightly.impl.compiler.PushStream in project sling by apache.

the class Streams method map.

/**
     * Attach the emitting visitor to the inStream.
     *
     * @param inStream       - the input stream
     * @param emitterVisitor - the emitter visitor
     * @return - the output stream of the emitter
     */
public static CommandStream map(CommandStream inStream, EmitterVisitor emitterVisitor) {
    PushStream outStream = emitterVisitor.getOutputStream();
    connect(inStream, outStream, emitterVisitor);
    return outStream;
}