You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@sling.apache.org by fm...@apache.org on 2015/02/06 16:08:38 UTC
svn commit: r1657853 -
/sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java
Author: fmeschbe
Date: Fri Feb 6 15:08:38 2015
New Revision: 1657853
URL: http://svn.apache.org/r1657853
Log:
SLING-4356 Implement support for 'data-sly-repeat'
(Apply patch by Radu Cotescu, thanks a lot)
Added:
sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java (with props)
Added: sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java
URL: http://svn.apache.org/viewvc/sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java?rev=1657853&view=auto
==============================================================================
--- sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java (added)
+++ sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java Fri Feb 6 15:08:38 2015
@@ -0,0 +1,128 @@
+/*******************************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ ******************************************************************************/
+package org.apache.sling.scripting.sightly.impl.plugin;
+
+
+import java.util.HashMap;
+
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Properties;
+import org.apache.felix.scr.annotations.Property;
+import org.apache.felix.scr.annotations.Service;
+import org.apache.sling.scripting.sightly.impl.compiler.Syntax;
+import org.apache.sling.scripting.sightly.impl.compiler.common.DefaultPluginInvoke;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.Expression;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.ExpressionNode;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.BinaryOperation;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.BinaryOperator;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.Identifier;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.MapLiteral;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.NumericConstant;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.UnaryOperation;
+import org.apache.sling.scripting.sightly.impl.compiler.expression.node.UnaryOperator;
+import org.apache.sling.scripting.sightly.impl.compiler.frontend.CompilerContext;
+import org.apache.sling.scripting.sightly.impl.compiler.ris.command.Conditional;
+import org.apache.sling.scripting.sightly.impl.compiler.ris.command.Loop;
+import org.apache.sling.scripting.sightly.impl.compiler.ris.command.VariableBinding;
+import org.apache.sling.scripting.sightly.impl.compiler.util.stream.PushStream;
+
+@Component
+@Service(Plugin.class)
+@Properties({
+ @Property(name = Plugin.SCR_PROP_NAME_BLOCK_NAME, value="repeat"),
+ @Property(name = Plugin.SCR_PROP_NAME_PRIORITY, intValue = 130)
+})
+public class RepeatPlugin extends PluginComponent {
+
+ private static final String INDEX = "index";
+ private static final String COUNT = "count";
+ private static final String FIRST = "first";
+ private static final String MIDDLE = "middle";
+ private static final String LAST = "last";
+ private static final String ODD = "odd";
+ private static final String EVEN = "even";
+
+ @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.emit(new VariableBinding.Start(listVariable, expression.getRoot()));
+ stream.emit(new VariableBinding.Start(collectionSizeVar,
+ new UnaryOperation(UnaryOperator.LENGTH, new Identifier(listVariable))));
+ stream.emit(new Conditional.Start(collectionSizeVar, true));
+ String itemVariable = decodeItemVariable();
+ String loopStatusVar = Syntax.itemLoopStatusVariable(itemVariable);
+ String indexVariable = compilerContext.generateVariable("index");
+ stream.emit(new Loop.Start(listVariable, itemVariable, indexVariable));
+ stream.emit(new VariableBinding.Start(loopStatusVar, buildStatusObj(indexVariable, collectionSizeVar)));
+
+ }
+
+ @Override
+ public void afterElement(PushStream stream) {
+ stream.emit(VariableBinding.END);
+ stream.emit(Loop.END);
+ stream.emit(Conditional.END);
+ stream.emit(VariableBinding.END);
+ stream.emit(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<String, ExpressionNode>();
+ 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);
+ }
+ };
+ }
+}
Propchange: sling/trunk/contrib/scripting/sightly/engine/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/RepeatPlugin.java
------------------------------------------------------------------------------
svn:mime-type = text/plain