webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 309 insertions, 0 deletions

diff --git a/Source/WebInspectorUI/UserInterface/Workers/Formatter/ESTreeWalker.js b/Source/WebInspectorUI/UserInterface/Workers/Formatter/ESTreeWalker.js
new file mode 100644
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--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Workers/Formatter/ESTreeWalker.js
@@ -0,0 +1,309 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Visit ES6 ESTree compatible AST nodes in program order.
+// <https://github.com/estree/estree>.
+//
+// The Node types and properties (for ES6) are described in:
+// <https://github.com/estree/estree/blob/master/es6.md>
+//
+// The ESTree spec doesn't appear to be complete yet, so this
+// currently assumes some Esprima nodes and properties.
+// <http://esprima.org/demo/parse.html>
+
+// FIXME: Add support for Import/Export/Modules nodes if we allow parsing modules.
+
+ESTreeWalker = class ESTreeWalker
+{
+    constructor(before, after)
+    {
+        console.assert(typeof before === "function");
+        console.assert(typeof after === "function");
+
+        this._before = before;
+        this._after = after;
+    }
+
+    walk(node)
+    {
+        this._walk(node, null);
+    }
+
+    // Private
+
+    _walk(node, parent)
+    {
+        if (!node)
+            return;
+
+        node.parent = parent;
+
+        this._before(node);
+        this._walkChildren(node);
+        this._after(node);
+    }
+
+    _walkArray(array, parent)
+    {
+        for (let i = 0; i < array.length; ++i)
+            this._walk(array[i], parent);
+    }
+
+    _walkChildren(node)
+    {
+        switch (node.type) {
+        case "AssignmentExpression":
+            this._walk(node.left, node);
+            this._walk(node.right, node);
+            break;
+        case "ArrayExpression":
+        case "ArrayPattern":
+            this._walkArray(node.elements, node);
+            break;
+        case "AssignmentPattern":
+            this._walk(node.left, node);
+            this._walk(node.right, node);
+            break;
+        case "AwaitExpression":
+            this._walk(node.argument, node);
+            break;
+        case "BlockStatement":
+            this._walkArray(node.body, node);
+            break;
+        case "BinaryExpression":
+            this._walk(node.left, node);
+            this._walk(node.right, node);
+            break;
+        case "BreakStatement":
+        case "ContinueStatement":
+            this._walk(node.label, node);
+            break;
+        case "CallExpression":
+            this._walk(node.callee, node);
+            this._walkArray(node.arguments, node);
+            break;
+        case "CatchClause":
+            this._walk(node.param, node);
+            this._walk(node.body, node);
+            break;
+        case "ClassBody":
+            this._walkArray(node.body, node);
+            break;
+        case "ClassDeclaration":
+        case "ClassExpression":
+            this._walk(node.id, node);
+            this._walk(node.superClass, node);
+            this._walk(node.body, node);
+            break;
+        case "DoWhileStatement":
+            this._walk(node.body, node);
+            this._walk(node.test, node);
+            break;
+        case "ExpressionStatement":
+            this._walk(node.expression, node);
+            break;
+        case "ForStatement":
+            this._walk(node.init, node);
+            this._walk(node.test, node);
+            this._walk(node.update, node);
+            this._walk(node.body, node);
+            break;
+        case "ForInStatement":
+        case "ForOfStatement":
+            this._walk(node.left, node);
+            this._walk(node.right, node);
+            this._walk(node.body, node);
+            break;
+        case "FunctionDeclaration":
+        case "FunctionExpression":
+        case "ArrowFunctionExpression":
+            this._walk(node.id, node);
+            this._walkArray(node.params, node);
+            this._walk(node.body, node);
+            break;
+        case "IfStatement":
+            this._walk(node.test, node);
+            this._walk(node.consequent, node);
+            this._walk(node.alternate, node);
+            break;
+        case "LabeledStatement":
+            this._walk(node.label, node);
+            this._walk(node.body, node);
+            break;
+        case "LogicalExpression":
+            this._walk(node.left, node);
+            this._walk(node.right, node);
+            break;
+        case "MemberExpression":
+            this._walk(node.object, node);
+            this._walk(node.property, node);
+            break;
+        case "MethodDefinition":
+            this._walk(node.key, node);
+            this._walk(node.value, node);
+            break;
+        case "NewExpression":
+            this._walk(node.callee, node);
+            this._walkArray(node.arguments, node);
+            break;
+        case "ObjectExpression":
+        case "ObjectPattern":
+            this._walkArray(node.properties, node);
+            break;
+        case "Program":
+            this._walkArray(node.body, node);
+            break;
+        case "Property":
+            this._walk(node.key, node);
+            this._walk(node.value, node);
+            break;
+        case "RestElement":
+            this._walk(node.argument, node);
+            break;
+        case "RestProperty":
+            this._walk(node.argument, node);
+            break;
+        case "ReturnStatement":
+            this._walk(node.argument, node);
+            break;
+        case "SequenceExpression":
+            this._walkArray(node.expressions, node);
+            break;
+        case "SpreadElement":
+            this._walk(node.argument, node);
+            break;
+        case "SpreadProperty":
+            this._walk(node.argument, node);
+            break;
+        case "SwitchStatement":
+            this._walk(node.discriminant, node);
+            this._walkArray(node.cases, node);
+            break;
+        case "SwitchCase":
+            this._walk(node.test, node);
+            this._walkArray(node.consequent, node);
+            break;
+        case "ConditionalExpression":
+            this._walk(node.test, node);
+            this._walk(node.consequent, node);
+            this._walk(node.alternate, node);
+            break;
+        case "TaggedTemplateExpression":
+            this._walk(node.tag, node);
+            this._walk(node.quasi, node);
+            break;
+        case "ThrowStatement":
+            this._walk(node.argument, node);
+            break;
+        case "TryStatement":
+            this._walk(node.block, node);
+            this._walk(node.handler, node);
+            this._walk(node.finalizer, node);
+            break;
+        case "UnaryExpression":
+            this._walk(node.argument, node);
+            break;
+        case "UpdateExpression":
+            this._walk(node.argument, node);
+            break;
+        case "VariableDeclaration":
+            this._walkArray(node.declarations, node);
+            break;
+        case "VariableDeclarator":
+            this._walk(node.id, node);
+            this._walk(node.init, node);
+            break;
+        case "WhileStatement":
+            this._walk(node.test, node);
+            this._walk(node.body, node);
+            break;
+        case "WithStatement":
+            this._walk(node.object, node);
+            this._walk(node.body, node);
+            break;
+        case "YieldExpression":
+            this._walk(node.argument, node);
+            break;
+
+        case "ExportAllDeclaration":
+            this._walk(node.source, node);
+            break;
+        case "ExportNamedDeclaration":
+            this._walk(node.declaration, node);
+            this._walkArray(node.specifiers, node);
+            this._walk(node.source, node);
+            break;
+        case "ExportDefaultDeclaration":
+            this._walk(node.declaration, node);
+            break;
+        case "ExportSpecifier":
+            this._walk(node.local, node);
+            this._walk(node.exported, node);
+            break;
+        case "ImportDeclaration":
+            this._walkArray(node.specifiers, node);
+            this._walk(node.source, node);
+            break;
+        case "ImportDefaultSpecifier":
+            this._walk(node.local, node);
+            break;
+        case "ImportNamespaceSpecifier":
+            this._walk(node.local, node);
+            break;
+        case "ImportSpecifier":
+            this._walk(node.imported, node);
+            this._walk(node.local, node);
+            break;
+        case "MetaProperty":
+            this._walk(node.meta, node);
+            this._walk(node.property, node);
+            break;
+
+        // Special case. We want to walk in program order,
+        // so walk quasi, expression, quasi, expression, etc.
+        case "TemplateLiteral":
+            for (var i = 0; i < node.expressions.length; ++i) {
+                this._walk(node.quasis[i], node);
+                this._walk(node.expressions[i], node);
+            }
+            break;
+
+        // Leaf nodes.
+        case "DebuggerStatement":
+        case "EmptyStatement":
+        case "Identifier":
+        case "Import":
+        case "Literal":
+        case "Super":
+        case "ThisExpression":
+        case "TemplateElement":
+            break;
+
+        default:
+            console.error("ESTreeWalker unhandled node type", node.type);
+            break;
+        }
+    }
+};