add node modules to repo

node_modules/chainsaw/index.js

@@ -0,0 +1,145 @@
+var Traverse = require('traverse');
+var EventEmitter = require('events').EventEmitter;
+
+module.exports = Chainsaw;
+function Chainsaw (builder) {
+    var saw = Chainsaw.saw(builder, {});
+    var r = builder.call(saw.handlers, saw);
+    if (r !== undefined) saw.handlers = r;
+    saw.record();
+    return saw.chain();
+};
+
+Chainsaw.light = function ChainsawLight (builder) {
+    var saw = Chainsaw.saw(builder, {});
+    var r = builder.call(saw.handlers, saw);
+    if (r !== undefined) saw.handlers = r;
+    return saw.chain();
+};
+
+Chainsaw.saw = function (builder, handlers) {
+    var saw = new EventEmitter;
+    saw.handlers = handlers;
+    saw.actions = [];
+
+    saw.chain = function () {
+        var ch = Traverse(saw.handlers).map(function (node) {
+            if (this.isRoot) return node;
+            var ps = this.path;
+
+            if (typeof node === 'function') {
+                this.update(function () {
+                    saw.actions.push({
+                        path : ps,
+                        args : [].slice.call(arguments)
+                    });
+                    return ch;
+                });
+            }
+        });
+
+        process.nextTick(function () {
+            saw.emit('begin');
+            saw.next();
+        });
+
+        return ch;
+    };
+
+    saw.pop = function () {
+        return saw.actions.shift();
+    };
+
+    saw.next = function () {
+        var action = saw.pop();
+
+        if (!action) {
+            saw.emit('end');
+        }
+        else if (!action.trap) {
+            var node = saw.handlers;
+            action.path.forEach(function (key) { node = node[key] });
+            node.apply(saw.handlers, action.args);
+        }
+    };
+
+    saw.nest = function (cb) {
+        var args = [].slice.call(arguments, 1);
+        var autonext = true;
+
+        if (typeof cb === 'boolean') {
+            var autonext = cb;
+            cb = args.shift();
+        }
+
+        var s = Chainsaw.saw(builder, {});
+        var r = builder.call(s.handlers, s);
+
+        if (r !== undefined) s.handlers = r;
+
+        // If we are recording...
+        if ("undefined" !== typeof saw.step) {
+            // ... our children should, too
+            s.record();
+        }
+
+        cb.apply(s.chain(), args);
+        if (autonext !== false) s.on('end', saw.next);
+    };
+
+    saw.record = function () {
+        upgradeChainsaw(saw);
+    };
+
+    ['trap', 'down', 'jump'].forEach(function (method) {
+        saw[method] = function () {
+            throw new Error("To use the trap, down and jump features, please "+
+                            "call record() first to start recording actions.");
+        };
+    });
+
+    return saw;
+};
+
+function upgradeChainsaw(saw) {
+    saw.step = 0;
+
+    // override pop
+    saw.pop = function () {
+        return saw.actions[saw.step++];
+    };
+
+    saw.trap = function (name, cb) {
+        var ps = Array.isArray(name) ? name : [name];
+        saw.actions.push({
+            path : ps,
+            step : saw.step,
+            cb : cb,
+            trap : true
+        });
+    };
+
+    saw.down = function (name) {
+        var ps = (Array.isArray(name) ? name : [name]).join('/');
+        var i = saw.actions.slice(saw.step).map(function (x) {
+            if (x.trap && x.step <= saw.step) return false;
+            return x.path.join('/') == ps;
+        }).indexOf(true);
+
+        if (i >= 0) saw.step += i;
+        else saw.step = saw.actions.length;
+
+        var act = saw.actions[saw.step - 1];
+        if (act && act.trap) {
+            // It's a trap!
+            saw.step = act.step;
+            act.cb();
+        }
+        else saw.next();
+    };
+
+    saw.jump = function (step) {
+        saw.step = step;
+        saw.next();
+    };
+};