feat(position): improve the element position

doc/_data/sidebar_doc.yml

@@ -95,7 +95,7 @@ entries:
           product: all
           version: all
 
-        - title: Comments
+        - title: Comments and Positions
           url: /comments.html
           audience: writers, designers
           platform: all

doc/comments.md

@@ -1,9 +1,11 @@
 ---
-title: Comments
-keywords: comments
-last_updated: May 25, 2016
+title: Comments and position
+keywords: comments position
+last_updated: November 25, 2016
 ---
 
+# Comment
+
 In Spoon there are four different kinds of comments:
 
 * File comments (comment at the begin of the file, generally licence) `CtComment.CommentType.FILE`
@@ -92,3 +94,16 @@ public class CtCommentProcessor extends AbstractProcessor<CtComment> {
     } 
 }
 ```
+
+# Source Position
+
+`SourcePosition` ([javadoc](http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/cu/SourcePosition.html)) defines the position of the `CtElement` ([javadoc](http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/declaration/CtElement.html)) in the original source file. 
+SourcePosition is extended by three specialized positions:
+
+- `DeclarationSourcePosition` ([javadoc](http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/cu/position/DeclarationSourcePosition.html)) 
+- `BodyHolderSourcePosition` ([javadoc](http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/cu/position/BodyHolderSourcePosition.html)).
+
+These three specializations are used to define the position of specific CtElement.
+For example DeclarationSourcePosition is used to define the position of all declarations (variable, type, method, ...).
+This provide an easy access to the position of the modifiers and the name.
+The BodyHolderSourcePosition is used to declare the position of all elements that have a body.

src/main/java/spoon/reflect/cu/SourcePosition.java

@@ -16,14 +16,18 @@
  */
 package spoon.reflect.cu;
 
-import java.io.File;
-
 import spoon.compiler.Environment;
+import spoon.reflect.cu.position.NoSourcePosition;
+
+import java.io.File;
+import java.io.Serializable;
 
 /**
  * This interface represents the position of a program element in a source file.
  */
-public interface SourcePosition {
+public interface SourcePosition extends Serializable {
+
+	SourcePosition NOPOSITION = new NoSourcePosition();
 
 	/**
 	 * Returns a string representation of this position in the form
@@ -79,9 +83,4 @@ public interface SourcePosition {
 	 * Gets the index at which the position starts in the source file.
 	 */
 	int getSourceStart();
-
-	/**
-	 * Gets the index at which the name of the element position starts in the source file.
-	 */
-	int getNameSourceStart();
 }

src/main/java/spoon/reflect/cu/position/BodyHolderSourcePosition.java

@@ -0,0 +1,28 @@
+/**
+ * Copyright (C) 2006-2016 INRIA and contributors
+ * Spoon - http://spoon.gforge.inria.fr/
+ *
+ * This software is governed by the CeCILL-C License under French law and
+ * abiding by the rules of distribution of free software. You can use, modify
+ * and/or redistribute the software under the terms of the CeCILL-C license as
+ * circulated by CEA, CNRS and INRIA at http://www.cecill.info.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the CeCILL-C License for more details.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL-C license and that you accept its terms.
+ */
+package spoon.reflect.cu.position;
+
+/**
+ * This interface represents the position of a Method declaration in a source file.
+ */
+public interface BodyHolderSourcePosition extends DeclarationSourcePosition {
+
+	int getBodyStart();
+
+	int getBodyEnd();
+
+}

src/main/java/spoon/reflect/cu/position/DeclarationSourcePosition.java

@@ -0,0 +1,34 @@
+/**
+ * Copyright (C) 2006-2016 INRIA and contributors
+ * Spoon - http://spoon.gforge.inria.fr/
+ *
+ * This software is governed by the CeCILL-C License under French law and
+ * abiding by the rules of distribution of free software. You can use, modify
+ * and/or redistribute the software under the terms of the CeCILL-C license as
+ * circulated by CEA, CNRS and INRIA at http://www.cecill.info.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the CeCILL-C License for more details.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL-C license and that you accept its terms.
+ */
+package spoon.reflect.cu.position;
+
+import spoon.reflect.cu.SourcePosition;
+
+/**
+ * This interface represents the position of a program element in a source file.
+ */
+public interface DeclarationSourcePosition extends SourcePosition {
+
+	int getModifierSourceStart();
+
+	int getModifierSourceEnd();
+
+	int getNameStart();
+
+	int getNameEnd();
+
+}

src/main/java/spoon/reflect/cu/position/NoSourcePosition.java

@@ -0,0 +1,76 @@
+/**
+ * Copyright (C) 2006-2016 INRIA and contributors
+ * Spoon - http://spoon.gforge.inria.fr/
+ *
+ * This software is governed by the CeCILL-C License under French law and
+ * abiding by the rules of distribution of free software. You can use, modify
+ * and/or redistribute the software under the terms of the CeCILL-C license as
+ * circulated by CEA, CNRS and INRIA at http://www.cecill.info.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the CeCILL-C License for more details.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL-C license and that you accept its terms.
+ */
+package spoon.reflect.cu.position;
+
+import spoon.reflect.cu.CompilationUnit;
+import spoon.reflect.cu.SourcePosition;
+
+import java.io.File;
+import java.io.Serializable;
+
+/**
+ * This interface represents the position of a program element in a source file.
+ */
+public class NoSourcePosition implements SourcePosition, Serializable {
+
+	private static final long serialVersionUID = 1L;
+
+	@Override
+	public File getFile() {
+		return null;
+	}
+
+	@Override
+	public CompilationUnit getCompilationUnit() {
+		return null;
+	}
+
+	@Override
+	public int getLine() {
+		return -1;
+	}
+
+	@Override
+	public int getEndLine() {
+		return -1;
+	}
+
+	@Override
+	public int getColumn() {
+		return -1;
+	}
+
+	@Override
+	public int getEndColumn() {
+		return -1;
+	}
+
+	@Override
+	public int getSourceEnd() {
+		return -1;
+	}
+
+	@Override
+	public int getSourceStart() {
+		return -1;
+	}
+
+	@Override
+	public String toString() {
+		return "(unknown file)";
+	}
+}

src/main/java/spoon/reflect/factory/CoreFactory.java

@@ -63,6 +63,8 @@
 import spoon.reflect.code.CtVariableWrite;
 import spoon.reflect.code.CtWhile;
 import spoon.reflect.cu.CompilationUnit;
+import spoon.reflect.cu.position.DeclarationSourcePosition;
+import spoon.reflect.cu.position.BodyHolderSourcePosition;
 import spoon.reflect.cu.SourcePosition;
 import spoon.reflect.declaration.CtAnnotation;
 import spoon.reflect.declaration.CtAnnotationMethod;
@@ -374,10 +376,38 @@ public interface CoreFactory {
 	/**
 	 * Creates a source position.
 	 */
+	@Deprecated
 	SourcePosition createSourcePosition(
 			CompilationUnit compilationUnit,
 			int startDeclaration, int startSource, int end, int[] lineSeparatorPositions);
 
+	/**
+	 * Creates a source position.
+	 */
+	SourcePosition createSourcePosition(
+			CompilationUnit compilationUnit,
+			int startSource, int end, int[] lineSeparatorPositions);
+
+	/**
+	 * Creates a declaration source position.
+	 */
+	DeclarationSourcePosition createDeclarationSourcePosition(
+			CompilationUnit compilationUnit,
+			int startSource, int end,
+			int modifierStart, int modifierEnd,
+			int declarationStart, int declarationEnd,
+			int[] lineSeparatorPositions);
+
+	/**
+	 * Creates a body holder source position.
+	 */
+	BodyHolderSourcePosition createBodyHolderSourcePosition(
+			CompilationUnit compilationUnit,
+			int startSource, int end,
+			int modifierStart, int modifierEnd,
+			int declarationStart, int declarationEnd,
+			int bodyStart, int bodyEnd, int[] lineSeparatorPositions);
+
 	/**
 	 * Creates a statement list.
 	 */

src/main/java/spoon/support/DefaultCoreFactory.java

@@ -64,6 +64,8 @@
 import spoon.reflect.code.CtWhile;
 import spoon.reflect.cu.CompilationUnit;
 import spoon.reflect.cu.SourcePosition;
+import spoon.reflect.cu.position.BodyHolderSourcePosition;
+import spoon.reflect.cu.position.DeclarationSourcePosition;
 import spoon.reflect.declaration.CtAnnotation;
 import spoon.reflect.declaration.CtAnnotationMethod;
 import spoon.reflect.declaration.CtAnnotationType;
@@ -140,7 +142,9 @@
 import spoon.support.reflect.code.CtVariableWriteImpl;
 import spoon.support.reflect.code.CtWhileImpl;
 import spoon.support.reflect.cu.CompilationUnitImpl;
-import spoon.support.reflect.cu.SourcePositionImpl;
+import spoon.support.reflect.cu.position.BodyHolderSourcePositionImpl;
+import spoon.support.reflect.cu.position.DeclarationSourcePositionImpl;
+import spoon.support.reflect.cu.position.SourcePositionImpl;
 import spoon.support.reflect.declaration.CtAnnotationImpl;
 import spoon.support.reflect.declaration.CtAnnotationMethodImpl;
 import spoon.support.reflect.declaration.CtAnnotationTypeImpl;
@@ -637,8 +641,30 @@ public void setMainFactory(Factory mainFactory) {
 		this.factory = mainFactory;
 	}
 
+	@Override
+	@Deprecated
 	public SourcePosition createSourcePosition(CompilationUnit compilationUnit, int startDeclaration, int startSource, int end, int[] lineSeparatorPositions) {
-		return new SourcePositionImpl(compilationUnit, startDeclaration, startSource, end, lineSeparatorPositions);
+		return new SourcePositionImpl(compilationUnit, startSource, end, lineSeparatorPositions);
+	}
+
+	@Override
+	public SourcePosition createSourcePosition(CompilationUnit compilationUnit, int startSource, int end, int[] lineSeparatorPositions) {
+		return new SourcePositionImpl(compilationUnit, startSource, end, lineSeparatorPositions);
+	}
+
+	@Override
+	public DeclarationSourcePosition createDeclarationSourcePosition(CompilationUnit compilationUnit, int startSource, int end, int modifierStart, int modifierEnd, int declarationStart, int declarationEnd, int[] lineSeparatorPositions) {
+		return new DeclarationSourcePositionImpl(compilationUnit, startSource, end, modifierStart, modifierEnd, declarationStart, declarationEnd, lineSeparatorPositions);
+	}
+
+	@Override
+	public BodyHolderSourcePosition createBodyHolderSourcePosition(CompilationUnit compilationUnit, int startSource, int end, int modifierStart, int modifierEnd, int declarationStart, int declarationEnd, int bodyStart, int bodyEnd, int[] lineSeparatorPositions) {
+		return new BodyHolderSourcePositionImpl(compilationUnit,
+				startSource, end,
+				modifierStart, modifierEnd,
+				declarationStart, declarationEnd,
+				bodyStart, bodyEnd,
+				lineSeparatorPositions);
 	}
 
 	public CompilationUnit createCompilationUnit() {

src/main/java/spoon/support/compiler/jdt/JDTCommentBuilder.java

@@ -123,7 +123,7 @@ private void buildComment(int[] positions) {
 		String commentContent = getCommentContent(start, end);
 
 		int[] lineSeparatorPositions = declarationUnit.compilationResult.lineSeparatorPositions;
-		SourcePosition sourcePosition = factory.Core().createSourcePosition(spoonUnit, start, start, end, lineSeparatorPositions);
+		SourcePosition sourcePosition = factory.Core().createSourcePosition(spoonUnit, start, end, lineSeparatorPositions);
 
 		// create the Spoon comment element
 		comment.setContent(commentContent);

src/main/java/spoon/support/compiler/jdt/JDTTreeBuilderHelper.java

@@ -43,7 +43,6 @@
 import spoon.reflect.code.CtLambda;
 import spoon.reflect.code.CtTypeAccess;
 import spoon.reflect.code.CtVariableAccess;
-import spoon.reflect.cu.CompilationUnit;
 import spoon.reflect.declaration.CtClass;
 import spoon.reflect.declaration.CtField;
 import spoon.reflect.declaration.CtMethod;
@@ -285,6 +284,8 @@ <T> CtVariableAccess<T> createVariableAccess(QualifiedNameReference qualifiedNam
 			va = createVariableAccess(ref, isOtherBinding && fromAssignment);
 		}
 
+		ref.setPosition(jdtTreeBuilder.getPositionBuilder().buildPosition(sourceStart, sourceEnd));
+
 		if (qualifiedNameReference.otherBindings != null) {
 			int i = 0; //positions index;
 			va.setPosition(ref.getPosition());
@@ -310,10 +311,8 @@ <T> CtVariableAccess<T> createVariableAccess(QualifiedNameReference qualifiedNam
 				CtFieldAccess<T> other = createFieldAccess(//
 						jdtTreeBuilder.getReferencesBuilder().<T>getVariableReference(null, qualifiedNameReference.tokens[i]), va, isOtherBinding && fromAssignment);
 				//set source position of va;
-				CompilationUnit cu = jdtTreeBuilder.getFactory().CompilationUnit().create(new String(jdtTreeBuilder.getContextBuilder().compilationunitdeclaration.getFileName()));
 				sourceEnd = (int) (positions[i]);
-				final int[] lineSeparatorPositions = jdtTreeBuilder.getContextBuilder().compilationunitdeclaration.compilationResult.lineSeparatorPositions;
-				va.setPosition(jdtTreeBuilder.getFactory().Core().createSourcePosition(cu, sourceStart, sourceStart, sourceEnd, lineSeparatorPositions));
+				va.setPosition(jdtTreeBuilder.getPositionBuilder().buildPosition(sourceStart, sourceEnd));
 				va = other;
 			}
 		}