Proper word selection inside string literals in JSON

json/src/com/intellij/json/editor/selection/JsonBasicWordSelectionFilter.java

@@ -0,0 +1,15 @@
+package com.intellij.json.editor.selection;
+
+import com.intellij.json.JsonParserDefinition;
+import com.intellij.openapi.util.Condition;
+import com.intellij.psi.PsiElement;
+
+/**
+ * @author Mikhail Golubev
+ */
+public class JsonBasicWordSelectionFilter implements Condition<PsiElement> {
+  @Override
+  public boolean value(PsiElement element) {
+    return !(JsonParserDefinition.STRING_LITERALS.contains(element.getNode().getElementType()));
+  }
+}

json/src/com/intellij/json/editor/selection/JsonStringLiteralSelectionHandler.java

@@ -0,0 +1,39 @@
+package com.intellij.json.editor.selection;
+
+import com.intellij.codeInsight.editorActions.ExtendWordSelectionHandlerBase;
+import com.intellij.codeInsight.editorActions.SelectWordUtil;
+import com.intellij.json.JsonParserDefinition;
+import com.intellij.json.psi.JsonStringLiteral;
+import com.intellij.lexer.StringLiteralLexer;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.ElementManipulators;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.tree.IElementType;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.intellij.json.JsonElementTypes.SINGLE_QUOTED_STRING;
+
+/**
+ * @author Mikhail Golubev
+ */
+public class JsonStringLiteralSelectionHandler extends ExtendWordSelectionHandlerBase {
+  @Override
+  public boolean canSelect(PsiElement e) {
+    return JsonParserDefinition.STRING_LITERALS.contains(e.getNode().getElementType());
+  }
+
+  @Override
+  public List<TextRange> select(PsiElement e, CharSequence editorText, int cursorOffset, Editor editor) {
+    final PsiElement parent = e.getParent();
+    assert parent instanceof JsonStringLiteral;
+    final IElementType type = e.getNode().getElementType();
+    final StringLiteralLexer lexer = new StringLiteralLexer(type == SINGLE_QUOTED_STRING ? '\'' : '"', type, false, "/", false, false);
+    final List<TextRange> result = new ArrayList<TextRange>();
+    SelectWordUtil.addWordHonoringEscapeSequences(editorText, e.getTextRange(), cursorOffset, lexer, result);
+    result.add(ElementManipulators.getValueTextRange(parent).shiftRight(parent.getTextOffset()));
+    return result;
+  }
+}

json/tests/test/com/intellij/json/JsonWordSelectionTest.java

@@ -0,0 +1,17 @@
+package com.intellij.json;
+
+import com.intellij.testFramework.fixtures.CodeInsightTestUtil;
+
+/**
+ * @author Mikhail Golubev
+ */
+public class JsonWordSelectionTest extends JsonTestCase {
+
+  private void doTest() {
+    CodeInsightTestUtil.doWordSelectionTestOnDirectory(myFixture, "selectWord/" + getTestName(false), "json");
+  }
+
+  public void testEscapeAwareness() {
+    doTest();
+  }
+}

json/tests/testData/selectWord/EscapeAwareness/after1.json

@@ -0,0 +1,3 @@
+[
+  "\tree \n<selection>ode</selection>"
+]

json/tests/testData/selectWord/EscapeAwareness/after2.json

@@ -0,0 +1,3 @@
+[
+  "<selection>\tree \node</selection>"
+]

json/tests/testData/selectWord/EscapeAwareness/after3.json

@@ -0,0 +1,3 @@
+[
+  <selection>"\tree \node"</selection>
+]

json/tests/testData/selectWord/EscapeAwareness/before.json

@@ -0,0 +1,3 @@
+[
+  "\tree \nod<caret>e"
+]

platform/platform-resources/src/META-INF/JsonPlugin.xml

@@ -40,6 +40,8 @@
     <statementUpDownMover implementation="com.intellij.json.editor.lineMover.JsonLineMover" id="JSON" order="before line"/>
     <liveTemplateContext implementation="com.intellij.json.JsonContextType"/>
     <spellchecker.support language="JSON" implementationClass="com.intellij.json.JsonSpellcheckerStrategy"/>
+    <extendWordSelectionHandler implementation="com.intellij.json.editor.selection.JsonStringLiteralSelectionHandler"/>
+    <basicWordSelectionFilter implementation="com.intellij.json.editor.selection.JsonBasicWordSelectionFilter"/>
 
     <!-- Annotators -->
     <annotator language="JSON" implementationClass="com.intellij.json.codeinsight.JsonStringLiteralAnnotator"/>