forked from projectmoon/tenebrous-dicebot
802 lines
26 KiB
JavaScript
802 lines
26 KiB
JavaScript
/*
|
|
Copyright (C) 2012-2013 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* 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 THE COPYRIGHT HOLDERS AND 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 <COPYRIGHT HOLDER> 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.
|
|
*/
|
|
/*jslint vars:false, bitwise:true*/
|
|
/*jshint indent:4*/
|
|
/*global exports:true*/
|
|
(function clone(exports) {
|
|
'use strict';
|
|
|
|
var Syntax,
|
|
VisitorOption,
|
|
VisitorKeys,
|
|
BREAK,
|
|
SKIP,
|
|
REMOVE;
|
|
|
|
function deepCopy(obj) {
|
|
var ret = {}, key, val;
|
|
for (key in obj) {
|
|
if (obj.hasOwnProperty(key)) {
|
|
val = obj[key];
|
|
if (typeof val === 'object' && val !== null) {
|
|
ret[key] = deepCopy(val);
|
|
} else {
|
|
ret[key] = val;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
// based on LLVM libc++ upper_bound / lower_bound
|
|
// MIT License
|
|
|
|
function upperBound(array, func) {
|
|
var diff, len, i, current;
|
|
|
|
len = array.length;
|
|
i = 0;
|
|
|
|
while (len) {
|
|
diff = len >>> 1;
|
|
current = i + diff;
|
|
if (func(array[current])) {
|
|
len = diff;
|
|
} else {
|
|
i = current + 1;
|
|
len -= diff + 1;
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
Syntax = {
|
|
AssignmentExpression: 'AssignmentExpression',
|
|
AssignmentPattern: 'AssignmentPattern',
|
|
ArrayExpression: 'ArrayExpression',
|
|
ArrayPattern: 'ArrayPattern',
|
|
ArrowFunctionExpression: 'ArrowFunctionExpression',
|
|
AwaitExpression: 'AwaitExpression', // CAUTION: It's deferred to ES7.
|
|
BlockStatement: 'BlockStatement',
|
|
BinaryExpression: 'BinaryExpression',
|
|
BreakStatement: 'BreakStatement',
|
|
CallExpression: 'CallExpression',
|
|
CatchClause: 'CatchClause',
|
|
ChainExpression: 'ChainExpression',
|
|
ClassBody: 'ClassBody',
|
|
ClassDeclaration: 'ClassDeclaration',
|
|
ClassExpression: 'ClassExpression',
|
|
ComprehensionBlock: 'ComprehensionBlock', // CAUTION: It's deferred to ES7.
|
|
ComprehensionExpression: 'ComprehensionExpression', // CAUTION: It's deferred to ES7.
|
|
ConditionalExpression: 'ConditionalExpression',
|
|
ContinueStatement: 'ContinueStatement',
|
|
DebuggerStatement: 'DebuggerStatement',
|
|
DirectiveStatement: 'DirectiveStatement',
|
|
DoWhileStatement: 'DoWhileStatement',
|
|
EmptyStatement: 'EmptyStatement',
|
|
ExportAllDeclaration: 'ExportAllDeclaration',
|
|
ExportDefaultDeclaration: 'ExportDefaultDeclaration',
|
|
ExportNamedDeclaration: 'ExportNamedDeclaration',
|
|
ExportSpecifier: 'ExportSpecifier',
|
|
ExpressionStatement: 'ExpressionStatement',
|
|
ForStatement: 'ForStatement',
|
|
ForInStatement: 'ForInStatement',
|
|
ForOfStatement: 'ForOfStatement',
|
|
FunctionDeclaration: 'FunctionDeclaration',
|
|
FunctionExpression: 'FunctionExpression',
|
|
GeneratorExpression: 'GeneratorExpression', // CAUTION: It's deferred to ES7.
|
|
Identifier: 'Identifier',
|
|
IfStatement: 'IfStatement',
|
|
ImportExpression: 'ImportExpression',
|
|
ImportDeclaration: 'ImportDeclaration',
|
|
ImportDefaultSpecifier: 'ImportDefaultSpecifier',
|
|
ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
|
|
ImportSpecifier: 'ImportSpecifier',
|
|
Literal: 'Literal',
|
|
LabeledStatement: 'LabeledStatement',
|
|
LogicalExpression: 'LogicalExpression',
|
|
MemberExpression: 'MemberExpression',
|
|
MetaProperty: 'MetaProperty',
|
|
MethodDefinition: 'MethodDefinition',
|
|
ModuleSpecifier: 'ModuleSpecifier',
|
|
NewExpression: 'NewExpression',
|
|
ObjectExpression: 'ObjectExpression',
|
|
ObjectPattern: 'ObjectPattern',
|
|
Program: 'Program',
|
|
Property: 'Property',
|
|
RestElement: 'RestElement',
|
|
ReturnStatement: 'ReturnStatement',
|
|
SequenceExpression: 'SequenceExpression',
|
|
SpreadElement: 'SpreadElement',
|
|
Super: 'Super',
|
|
SwitchStatement: 'SwitchStatement',
|
|
SwitchCase: 'SwitchCase',
|
|
TaggedTemplateExpression: 'TaggedTemplateExpression',
|
|
TemplateElement: 'TemplateElement',
|
|
TemplateLiteral: 'TemplateLiteral',
|
|
ThisExpression: 'ThisExpression',
|
|
ThrowStatement: 'ThrowStatement',
|
|
TryStatement: 'TryStatement',
|
|
UnaryExpression: 'UnaryExpression',
|
|
UpdateExpression: 'UpdateExpression',
|
|
VariableDeclaration: 'VariableDeclaration',
|
|
VariableDeclarator: 'VariableDeclarator',
|
|
WhileStatement: 'WhileStatement',
|
|
WithStatement: 'WithStatement',
|
|
YieldExpression: 'YieldExpression'
|
|
};
|
|
|
|
VisitorKeys = {
|
|
AssignmentExpression: ['left', 'right'],
|
|
AssignmentPattern: ['left', 'right'],
|
|
ArrayExpression: ['elements'],
|
|
ArrayPattern: ['elements'],
|
|
ArrowFunctionExpression: ['params', 'body'],
|
|
AwaitExpression: ['argument'], // CAUTION: It's deferred to ES7.
|
|
BlockStatement: ['body'],
|
|
BinaryExpression: ['left', 'right'],
|
|
BreakStatement: ['label'],
|
|
CallExpression: ['callee', 'arguments'],
|
|
CatchClause: ['param', 'body'],
|
|
ChainExpression: ['expression'],
|
|
ClassBody: ['body'],
|
|
ClassDeclaration: ['id', 'superClass', 'body'],
|
|
ClassExpression: ['id', 'superClass', 'body'],
|
|
ComprehensionBlock: ['left', 'right'], // CAUTION: It's deferred to ES7.
|
|
ComprehensionExpression: ['blocks', 'filter', 'body'], // CAUTION: It's deferred to ES7.
|
|
ConditionalExpression: ['test', 'consequent', 'alternate'],
|
|
ContinueStatement: ['label'],
|
|
DebuggerStatement: [],
|
|
DirectiveStatement: [],
|
|
DoWhileStatement: ['body', 'test'],
|
|
EmptyStatement: [],
|
|
ExportAllDeclaration: ['source'],
|
|
ExportDefaultDeclaration: ['declaration'],
|
|
ExportNamedDeclaration: ['declaration', 'specifiers', 'source'],
|
|
ExportSpecifier: ['exported', 'local'],
|
|
ExpressionStatement: ['expression'],
|
|
ForStatement: ['init', 'test', 'update', 'body'],
|
|
ForInStatement: ['left', 'right', 'body'],
|
|
ForOfStatement: ['left', 'right', 'body'],
|
|
FunctionDeclaration: ['id', 'params', 'body'],
|
|
FunctionExpression: ['id', 'params', 'body'],
|
|
GeneratorExpression: ['blocks', 'filter', 'body'], // CAUTION: It's deferred to ES7.
|
|
Identifier: [],
|
|
IfStatement: ['test', 'consequent', 'alternate'],
|
|
ImportExpression: ['source'],
|
|
ImportDeclaration: ['specifiers', 'source'],
|
|
ImportDefaultSpecifier: ['local'],
|
|
ImportNamespaceSpecifier: ['local'],
|
|
ImportSpecifier: ['imported', 'local'],
|
|
Literal: [],
|
|
LabeledStatement: ['label', 'body'],
|
|
LogicalExpression: ['left', 'right'],
|
|
MemberExpression: ['object', 'property'],
|
|
MetaProperty: ['meta', 'property'],
|
|
MethodDefinition: ['key', 'value'],
|
|
ModuleSpecifier: [],
|
|
NewExpression: ['callee', 'arguments'],
|
|
ObjectExpression: ['properties'],
|
|
ObjectPattern: ['properties'],
|
|
Program: ['body'],
|
|
Property: ['key', 'value'],
|
|
RestElement: [ 'argument' ],
|
|
ReturnStatement: ['argument'],
|
|
SequenceExpression: ['expressions'],
|
|
SpreadElement: ['argument'],
|
|
Super: [],
|
|
SwitchStatement: ['discriminant', 'cases'],
|
|
SwitchCase: ['test', 'consequent'],
|
|
TaggedTemplateExpression: ['tag', 'quasi'],
|
|
TemplateElement: [],
|
|
TemplateLiteral: ['quasis', 'expressions'],
|
|
ThisExpression: [],
|
|
ThrowStatement: ['argument'],
|
|
TryStatement: ['block', 'handler', 'finalizer'],
|
|
UnaryExpression: ['argument'],
|
|
UpdateExpression: ['argument'],
|
|
VariableDeclaration: ['declarations'],
|
|
VariableDeclarator: ['id', 'init'],
|
|
WhileStatement: ['test', 'body'],
|
|
WithStatement: ['object', 'body'],
|
|
YieldExpression: ['argument']
|
|
};
|
|
|
|
// unique id
|
|
BREAK = {};
|
|
SKIP = {};
|
|
REMOVE = {};
|
|
|
|
VisitorOption = {
|
|
Break: BREAK,
|
|
Skip: SKIP,
|
|
Remove: REMOVE
|
|
};
|
|
|
|
function Reference(parent, key) {
|
|
this.parent = parent;
|
|
this.key = key;
|
|
}
|
|
|
|
Reference.prototype.replace = function replace(node) {
|
|
this.parent[this.key] = node;
|
|
};
|
|
|
|
Reference.prototype.remove = function remove() {
|
|
if (Array.isArray(this.parent)) {
|
|
this.parent.splice(this.key, 1);
|
|
return true;
|
|
} else {
|
|
this.replace(null);
|
|
return false;
|
|
}
|
|
};
|
|
|
|
function Element(node, path, wrap, ref) {
|
|
this.node = node;
|
|
this.path = path;
|
|
this.wrap = wrap;
|
|
this.ref = ref;
|
|
}
|
|
|
|
function Controller() { }
|
|
|
|
// API:
|
|
// return property path array from root to current node
|
|
Controller.prototype.path = function path() {
|
|
var i, iz, j, jz, result, element;
|
|
|
|
function addToPath(result, path) {
|
|
if (Array.isArray(path)) {
|
|
for (j = 0, jz = path.length; j < jz; ++j) {
|
|
result.push(path[j]);
|
|
}
|
|
} else {
|
|
result.push(path);
|
|
}
|
|
}
|
|
|
|
// root node
|
|
if (!this.__current.path) {
|
|
return null;
|
|
}
|
|
|
|
// first node is sentinel, second node is root element
|
|
result = [];
|
|
for (i = 2, iz = this.__leavelist.length; i < iz; ++i) {
|
|
element = this.__leavelist[i];
|
|
addToPath(result, element.path);
|
|
}
|
|
addToPath(result, this.__current.path);
|
|
return result;
|
|
};
|
|
|
|
// API:
|
|
// return type of current node
|
|
Controller.prototype.type = function () {
|
|
var node = this.current();
|
|
return node.type || this.__current.wrap;
|
|
};
|
|
|
|
// API:
|
|
// return array of parent elements
|
|
Controller.prototype.parents = function parents() {
|
|
var i, iz, result;
|
|
|
|
// first node is sentinel
|
|
result = [];
|
|
for (i = 1, iz = this.__leavelist.length; i < iz; ++i) {
|
|
result.push(this.__leavelist[i].node);
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
// API:
|
|
// return current node
|
|
Controller.prototype.current = function current() {
|
|
return this.__current.node;
|
|
};
|
|
|
|
Controller.prototype.__execute = function __execute(callback, element) {
|
|
var previous, result;
|
|
|
|
result = undefined;
|
|
|
|
previous = this.__current;
|
|
this.__current = element;
|
|
this.__state = null;
|
|
if (callback) {
|
|
result = callback.call(this, element.node, this.__leavelist[this.__leavelist.length - 1].node);
|
|
}
|
|
this.__current = previous;
|
|
|
|
return result;
|
|
};
|
|
|
|
// API:
|
|
// notify control skip / break
|
|
Controller.prototype.notify = function notify(flag) {
|
|
this.__state = flag;
|
|
};
|
|
|
|
// API:
|
|
// skip child nodes of current node
|
|
Controller.prototype.skip = function () {
|
|
this.notify(SKIP);
|
|
};
|
|
|
|
// API:
|
|
// break traversals
|
|
Controller.prototype['break'] = function () {
|
|
this.notify(BREAK);
|
|
};
|
|
|
|
// API:
|
|
// remove node
|
|
Controller.prototype.remove = function () {
|
|
this.notify(REMOVE);
|
|
};
|
|
|
|
Controller.prototype.__initialize = function(root, visitor) {
|
|
this.visitor = visitor;
|
|
this.root = root;
|
|
this.__worklist = [];
|
|
this.__leavelist = [];
|
|
this.__current = null;
|
|
this.__state = null;
|
|
this.__fallback = null;
|
|
if (visitor.fallback === 'iteration') {
|
|
this.__fallback = Object.keys;
|
|
} else if (typeof visitor.fallback === 'function') {
|
|
this.__fallback = visitor.fallback;
|
|
}
|
|
|
|
this.__keys = VisitorKeys;
|
|
if (visitor.keys) {
|
|
this.__keys = Object.assign(Object.create(this.__keys), visitor.keys);
|
|
}
|
|
};
|
|
|
|
function isNode(node) {
|
|
if (node == null) {
|
|
return false;
|
|
}
|
|
return typeof node === 'object' && typeof node.type === 'string';
|
|
}
|
|
|
|
function isProperty(nodeType, key) {
|
|
return (nodeType === Syntax.ObjectExpression || nodeType === Syntax.ObjectPattern) && 'properties' === key;
|
|
}
|
|
|
|
function candidateExistsInLeaveList(leavelist, candidate) {
|
|
for (var i = leavelist.length - 1; i >= 0; --i) {
|
|
if (leavelist[i].node === candidate) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
Controller.prototype.traverse = function traverse(root, visitor) {
|
|
var worklist,
|
|
leavelist,
|
|
element,
|
|
node,
|
|
nodeType,
|
|
ret,
|
|
key,
|
|
current,
|
|
current2,
|
|
candidates,
|
|
candidate,
|
|
sentinel;
|
|
|
|
this.__initialize(root, visitor);
|
|
|
|
sentinel = {};
|
|
|
|
// reference
|
|
worklist = this.__worklist;
|
|
leavelist = this.__leavelist;
|
|
|
|
// initialize
|
|
worklist.push(new Element(root, null, null, null));
|
|
leavelist.push(new Element(null, null, null, null));
|
|
|
|
while (worklist.length) {
|
|
element = worklist.pop();
|
|
|
|
if (element === sentinel) {
|
|
element = leavelist.pop();
|
|
|
|
ret = this.__execute(visitor.leave, element);
|
|
|
|
if (this.__state === BREAK || ret === BREAK) {
|
|
return;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (element.node) {
|
|
|
|
ret = this.__execute(visitor.enter, element);
|
|
|
|
if (this.__state === BREAK || ret === BREAK) {
|
|
return;
|
|
}
|
|
|
|
worklist.push(sentinel);
|
|
leavelist.push(element);
|
|
|
|
if (this.__state === SKIP || ret === SKIP) {
|
|
continue;
|
|
}
|
|
|
|
node = element.node;
|
|
nodeType = node.type || element.wrap;
|
|
candidates = this.__keys[nodeType];
|
|
if (!candidates) {
|
|
if (this.__fallback) {
|
|
candidates = this.__fallback(node);
|
|
} else {
|
|
throw new Error('Unknown node type ' + nodeType + '.');
|
|
}
|
|
}
|
|
|
|
current = candidates.length;
|
|
while ((current -= 1) >= 0) {
|
|
key = candidates[current];
|
|
candidate = node[key];
|
|
if (!candidate) {
|
|
continue;
|
|
}
|
|
|
|
if (Array.isArray(candidate)) {
|
|
current2 = candidate.length;
|
|
while ((current2 -= 1) >= 0) {
|
|
if (!candidate[current2]) {
|
|
continue;
|
|
}
|
|
|
|
if (candidateExistsInLeaveList(leavelist, candidate[current2])) {
|
|
continue;
|
|
}
|
|
|
|
if (isProperty(nodeType, candidates[current])) {
|
|
element = new Element(candidate[current2], [key, current2], 'Property', null);
|
|
} else if (isNode(candidate[current2])) {
|
|
element = new Element(candidate[current2], [key, current2], null, null);
|
|
} else {
|
|
continue;
|
|
}
|
|
worklist.push(element);
|
|
}
|
|
} else if (isNode(candidate)) {
|
|
if (candidateExistsInLeaveList(leavelist, candidate)) {
|
|
continue;
|
|
}
|
|
|
|
worklist.push(new Element(candidate, key, null, null));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
Controller.prototype.replace = function replace(root, visitor) {
|
|
var worklist,
|
|
leavelist,
|
|
node,
|
|
nodeType,
|
|
target,
|
|
element,
|
|
current,
|
|
current2,
|
|
candidates,
|
|
candidate,
|
|
sentinel,
|
|
outer,
|
|
key;
|
|
|
|
function removeElem(element) {
|
|
var i,
|
|
key,
|
|
nextElem,
|
|
parent;
|
|
|
|
if (element.ref.remove()) {
|
|
// When the reference is an element of an array.
|
|
key = element.ref.key;
|
|
parent = element.ref.parent;
|
|
|
|
// If removed from array, then decrease following items' keys.
|
|
i = worklist.length;
|
|
while (i--) {
|
|
nextElem = worklist[i];
|
|
if (nextElem.ref && nextElem.ref.parent === parent) {
|
|
if (nextElem.ref.key < key) {
|
|
break;
|
|
}
|
|
--nextElem.ref.key;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
this.__initialize(root, visitor);
|
|
|
|
sentinel = {};
|
|
|
|
// reference
|
|
worklist = this.__worklist;
|
|
leavelist = this.__leavelist;
|
|
|
|
// initialize
|
|
outer = {
|
|
root: root
|
|
};
|
|
element = new Element(root, null, null, new Reference(outer, 'root'));
|
|
worklist.push(element);
|
|
leavelist.push(element);
|
|
|
|
while (worklist.length) {
|
|
element = worklist.pop();
|
|
|
|
if (element === sentinel) {
|
|
element = leavelist.pop();
|
|
|
|
target = this.__execute(visitor.leave, element);
|
|
|
|
// node may be replaced with null,
|
|
// so distinguish between undefined and null in this place
|
|
if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
|
|
// replace
|
|
element.ref.replace(target);
|
|
}
|
|
|
|
if (this.__state === REMOVE || target === REMOVE) {
|
|
removeElem(element);
|
|
}
|
|
|
|
if (this.__state === BREAK || target === BREAK) {
|
|
return outer.root;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
target = this.__execute(visitor.enter, element);
|
|
|
|
// node may be replaced with null,
|
|
// so distinguish between undefined and null in this place
|
|
if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
|
|
// replace
|
|
element.ref.replace(target);
|
|
element.node = target;
|
|
}
|
|
|
|
if (this.__state === REMOVE || target === REMOVE) {
|
|
removeElem(element);
|
|
element.node = null;
|
|
}
|
|
|
|
if (this.__state === BREAK || target === BREAK) {
|
|
return outer.root;
|
|
}
|
|
|
|
// node may be null
|
|
node = element.node;
|
|
if (!node) {
|
|
continue;
|
|
}
|
|
|
|
worklist.push(sentinel);
|
|
leavelist.push(element);
|
|
|
|
if (this.__state === SKIP || target === SKIP) {
|
|
continue;
|
|
}
|
|
|
|
nodeType = node.type || element.wrap;
|
|
candidates = this.__keys[nodeType];
|
|
if (!candidates) {
|
|
if (this.__fallback) {
|
|
candidates = this.__fallback(node);
|
|
} else {
|
|
throw new Error('Unknown node type ' + nodeType + '.');
|
|
}
|
|
}
|
|
|
|
current = candidates.length;
|
|
while ((current -= 1) >= 0) {
|
|
key = candidates[current];
|
|
candidate = node[key];
|
|
if (!candidate) {
|
|
continue;
|
|
}
|
|
|
|
if (Array.isArray(candidate)) {
|
|
current2 = candidate.length;
|
|
while ((current2 -= 1) >= 0) {
|
|
if (!candidate[current2]) {
|
|
continue;
|
|
}
|
|
if (isProperty(nodeType, candidates[current])) {
|
|
element = new Element(candidate[current2], [key, current2], 'Property', new Reference(candidate, current2));
|
|
} else if (isNode(candidate[current2])) {
|
|
element = new Element(candidate[current2], [key, current2], null, new Reference(candidate, current2));
|
|
} else {
|
|
continue;
|
|
}
|
|
worklist.push(element);
|
|
}
|
|
} else if (isNode(candidate)) {
|
|
worklist.push(new Element(candidate, key, null, new Reference(node, key)));
|
|
}
|
|
}
|
|
}
|
|
|
|
return outer.root;
|
|
};
|
|
|
|
function traverse(root, visitor) {
|
|
var controller = new Controller();
|
|
return controller.traverse(root, visitor);
|
|
}
|
|
|
|
function replace(root, visitor) {
|
|
var controller = new Controller();
|
|
return controller.replace(root, visitor);
|
|
}
|
|
|
|
function extendCommentRange(comment, tokens) {
|
|
var target;
|
|
|
|
target = upperBound(tokens, function search(token) {
|
|
return token.range[0] > comment.range[0];
|
|
});
|
|
|
|
comment.extendedRange = [comment.range[0], comment.range[1]];
|
|
|
|
if (target !== tokens.length) {
|
|
comment.extendedRange[1] = tokens[target].range[0];
|
|
}
|
|
|
|
target -= 1;
|
|
if (target >= 0) {
|
|
comment.extendedRange[0] = tokens[target].range[1];
|
|
}
|
|
|
|
return comment;
|
|
}
|
|
|
|
function attachComments(tree, providedComments, tokens) {
|
|
// At first, we should calculate extended comment ranges.
|
|
var comments = [], comment, len, i, cursor;
|
|
|
|
if (!tree.range) {
|
|
throw new Error('attachComments needs range information');
|
|
}
|
|
|
|
// tokens array is empty, we attach comments to tree as 'leadingComments'
|
|
if (!tokens.length) {
|
|
if (providedComments.length) {
|
|
for (i = 0, len = providedComments.length; i < len; i += 1) {
|
|
comment = deepCopy(providedComments[i]);
|
|
comment.extendedRange = [0, tree.range[0]];
|
|
comments.push(comment);
|
|
}
|
|
tree.leadingComments = comments;
|
|
}
|
|
return tree;
|
|
}
|
|
|
|
for (i = 0, len = providedComments.length; i < len; i += 1) {
|
|
comments.push(extendCommentRange(deepCopy(providedComments[i]), tokens));
|
|
}
|
|
|
|
// This is based on John Freeman's implementation.
|
|
cursor = 0;
|
|
traverse(tree, {
|
|
enter: function (node) {
|
|
var comment;
|
|
|
|
while (cursor < comments.length) {
|
|
comment = comments[cursor];
|
|
if (comment.extendedRange[1] > node.range[0]) {
|
|
break;
|
|
}
|
|
|
|
if (comment.extendedRange[1] === node.range[0]) {
|
|
if (!node.leadingComments) {
|
|
node.leadingComments = [];
|
|
}
|
|
node.leadingComments.push(comment);
|
|
comments.splice(cursor, 1);
|
|
} else {
|
|
cursor += 1;
|
|
}
|
|
}
|
|
|
|
// already out of owned node
|
|
if (cursor === comments.length) {
|
|
return VisitorOption.Break;
|
|
}
|
|
|
|
if (comments[cursor].extendedRange[0] > node.range[1]) {
|
|
return VisitorOption.Skip;
|
|
}
|
|
}
|
|
});
|
|
|
|
cursor = 0;
|
|
traverse(tree, {
|
|
leave: function (node) {
|
|
var comment;
|
|
|
|
while (cursor < comments.length) {
|
|
comment = comments[cursor];
|
|
if (node.range[1] < comment.extendedRange[0]) {
|
|
break;
|
|
}
|
|
|
|
if (node.range[1] === comment.extendedRange[0]) {
|
|
if (!node.trailingComments) {
|
|
node.trailingComments = [];
|
|
}
|
|
node.trailingComments.push(comment);
|
|
comments.splice(cursor, 1);
|
|
} else {
|
|
cursor += 1;
|
|
}
|
|
}
|
|
|
|
// already out of owned node
|
|
if (cursor === comments.length) {
|
|
return VisitorOption.Break;
|
|
}
|
|
|
|
if (comments[cursor].extendedRange[0] > node.range[1]) {
|
|
return VisitorOption.Skip;
|
|
}
|
|
}
|
|
});
|
|
|
|
return tree;
|
|
}
|
|
|
|
exports.Syntax = Syntax;
|
|
exports.traverse = traverse;
|
|
exports.replace = replace;
|
|
exports.attachComments = attachComments;
|
|
exports.VisitorKeys = VisitorKeys;
|
|
exports.VisitorOption = VisitorOption;
|
|
exports.Controller = Controller;
|
|
exports.cloneEnvironment = function () { return clone({}); };
|
|
|
|
return exports;
|
|
}(exports));
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|