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Coverage for /Users/jdemorai/projects/dust-Linkedin/dustjs/lib/dust.js : 86%

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  var dust = {};
  
  (function(dust) {
  
  dust.cache = {};
  
  dust.register = function(name, tmpl) {
    if (!name) return;
    dust.cache[name] = tmpl;
  };
  
  dust.render = function(name, context, callback) {
    var chunk = new Stub(callback).head;
    dust.load(name, chunk, Context.wrap(context)).end();
  };
  
  dust.stream = function(name, context) {
    var stream = new Stream();
    dust.nextTick(function() {
      dust.load(name, stream.head, Context.wrap(context)).end();
    });
    return stream;
  };
  
  dust.renderSource = function(source, context, callback) {
    return dust.compileFn(source)(context, callback);
  };
  
  dust.compileFn = function(source, name) {
    var tmpl = dust.loadSource(dust.compile(source, name));
    return function(context, callback) {
      var master = callback ? new Stub(callback) : new Stream();
      dust.nextTick(function() {
        tmpl(master.head, Context.wrap(context)).end();
      });
      return master;
    }
  };
  
  dust.load = function(name, chunk, context) {
    var tmpl = dust.cache[name];
    if (tmpl) {
      return tmpl(chunk, context);
    } else {
      if (dust.onLoad) {
        return chunk.map(function(chunk) {
          dust.onLoad(name, function(err, src) {
            if (err) return chunk.setError(err);
            if (!dust.cache[name]) dust.loadSource(dust.compile(src, name));
            dust.cache[name](chunk, context).end();
          });
        });
      }
      return chunk.setError(new Error("Template Not Found: " + name));
    }
  };
  
  dust.loadSource = function(source, path) {
    return eval(source);
  };
  
  if (Array.isArray) {
    dust.isArray = Array.isArray;
  } else {
    dust.isArray = function(arr) {
      return Object.prototype.toString.call(arr) == "[object Array]";
    };
  }
  
  dust.nextTick = function(callback) {
    setTimeout(callback, 0);
  }
  
  dust.isEmpty = function(value) {
    if (dust.isArray(value) && !value.length) return true;
    if (value === 0) return false;
    return (!value);
  };
  
  dust.filter = function(string, auto, filters) {
    if (filters) {
      for (var i=0, len=filters.length; i<len; i++) {
        var name = filters[i];
        if (name === "s") {
          auto = null;
        } else {
          string = dust.filters[name](string);
        }
      }
    }
    if (auto) {
      string = dust.filters[auto](string);
    }
    return string;
  };
  
  dust.filters = {
    h: function(value) { return dust.escapeHtml(value); },
    j: function(value) { return dust.escapeJs(value); },
    u: encodeURI,
    uc: encodeURIComponent
  }
  
  function Context(stack, global, blocks) {
    this.stack  = stack;
    this.global = global;
    this.blocks = blocks;
  }
  
  dust.makeBase = function(global) {
    return new Context(new Stack(), global);
  }
  
  Context.wrap = function(context) {
    if (context instanceof Context) {
      return context;
    }
    return new Context(new Stack(context));
  }
  
  Context.prototype.get = function(key) {
    var ctx = this.stack, value;
  
    while(ctx) {
      if (ctx.isObject) {
        value = ctx.head[key];
        if (!(value === undefined)) {
          return value;
        }
      }
      ctx = ctx.tail;
    }
    return this.global ? this.global[key] : undefined;
  };
  
  Context.prototype.getPath = function(cur, down) {
    var ctx = this.stack,
        len = down.length;
  
    if (cur && len === 0) return ctx.head;
    if (!ctx.isObject) return undefined;
    ctx = ctx.head;
    var i = 0;
    while(ctx && i < len) {
      ctx = ctx[down[i]];
      i++;
    }
    return ctx;
  };
  
  Context.prototype.push = function(head, idx, len) {
    if( head ){
     // loop index for a block section
     head['$idx'] = idx;
     // loop size for a block section
     head['$len'] = len;
    }
    return new Context(new Stack(head, this.stack, idx, len), this.global, this.blocks);
  };
  
  Context.prototype.rebase = function(head) {
    return new Context(new Stack(head), this.global, this.blocks);
  };
  
  Context.prototype.current = function() {
    return this.stack.head;
  };
  
  Context.prototype.getBlock = function(key) {
    var blocks = this.blocks;
  
    if (!blocks) return;
    var len = blocks.length, fn;
    while (len--) {
      fn = blocks[len][key];
      if (fn) return fn;
    }
  }
  
  Context.prototype.shiftBlocks = function(locals) {
    var blocks = this.blocks;
  
    if (locals) {
      if (!blocks) {
        newBlocks = [locals];
      } else {
        newBlocks = blocks.concat([locals]);
      }
      return new Context(this.stack, this.global, newBlocks);
    }
    return this;
  }
  
  function Stack(head, tail, idx, len) {
    this.tail = tail;
    this.isObject = !dust.isArray(head) && head && typeof head === "object";
    this.head = head;
    this.index = idx;
    this.of = len;
  }
  
  function Stub(callback) {
    this.head = new Chunk(this);
    this.callback = callback;
    this.out = '';
  }
  
  Stub.prototype.flush = function() {
    var chunk = this.head;
  
    while (chunk) {
      if (chunk.flushable) {
        this.out += chunk.data;
      } else if (chunk.error) {
        this.callback(chunk.error);
        this.flush = function() {};
        return;
      } else {
        return;
      }
      chunk = chunk.next;
      this.head = chunk;
    }
    this.callback(null, this.out);
  }
  
  function Stream() {
    this.head = new Chunk(this);
  }
  
  Stream.prototype.flush = function() {
    var chunk = this.head;
  
    while(chunk) {
      if (chunk.flushable) {
        this.emit('data', chunk.data);
      } else if (chunk.error) {
        this.emit('error', chunk.error);
        this.flush = function() {};
        return;
      } else {
        return;
      }
      chunk = chunk.next;
      this.head = chunk;
    }
    this.emit('end');
  }
  
  Stream.prototype.emit = function(type, data) {
    var events = this.events;
  
    if (events && events[type]) {
      events[type](data);
    }
  }
  
  Stream.prototype.on = function(type, callback) {
    if (!this.events) {
      this.events = {};
    }
    this.events[type] = callback;
    return this;
  }
  
  function Chunk(root, next, taps) {
    this.root = root;
    this.next = next;
    this.data = '';
    this.flushable = false;
    this.taps = taps;
  }
  
  Chunk.prototype.write = function(data) {
    var taps  = this.taps;
  
    if (taps) {
      data = taps.go(data);
    }
    this.data += data;
    return this;
  }
  
  Chunk.prototype.end = function(data) {
    if (data) {
      this.write(data);
    }
    this.flushable = true;
    this.root.flush();
    return this;
  }
  
  Chunk.prototype.map = function(callback) {
    var cursor = new Chunk(this.root, this.next, this.taps),
        branch = new Chunk(this.root, cursor, this.taps);
  
    this.next = branch;
    this.flushable = true;
    callback(branch);
    return cursor;
  }
  
  Chunk.prototype.tap = function(tap) {
    var taps = this.taps;
  
    if (taps) {
      this.taps = taps.push(tap);
    } else {
      this.taps = new Tap(tap);
    }
    return this;
  }
  
  Chunk.prototype.untap = function() {
    this.taps = this.taps.tail;
    return this;
  }
  
  Chunk.prototype.render = function(body, context) {
    return body(this, context);
  }
  
  Chunk.prototype.reference = function(elem, context, auto, filters) {
    if (typeof elem === "function") {
      elem = elem(this, context, null, {auto: auto, filters: filters});
      if (elem instanceof Chunk) {
        return elem;
      }
    }
    if (!dust.isEmpty(elem)) {
      return this.write(dust.filter(elem, auto, filters));
    } else {
      return this;
    }
  };
  
  Chunk.prototype.section = function(elem, context, bodies, params) {
    if (typeof elem === "function") {
      elem = elem(this, context, bodies, params);
      if (elem instanceof Chunk) {
        return elem;
      }
    }
  
    var body = bodies.block,
        skip = bodies['else'];
  
    if (params) {
      context = context.push(params);
    }
  
    if (dust.isArray(elem)) {
      if (body) {
        var len = elem.length, chunk = this;
        for (var i=0; i<len; i++) {
          chunk = body(chunk, context.push(elem[i], i, len));
        }
        return chunk;
      }
    } else if (elem === true) {
      if (body) return body(this, context);
    } else if (elem || elem === 0) {
      if (body) return body(this, context.push(elem));
    } else if (skip) {
      return skip(this, context);
    }
    return this;
  };
  
  Chunk.prototype.exists = function(elem, context, bodies) {
    var body = bodies.block,
        skip = bodies['else'];
  
    if (!dust.isEmpty(elem)) {
      if (body) return body(this, context);
    } else if (skip) {
      return skip(this, context);
    }
    return this;
  }
  
  Chunk.prototype.notexists = function(elem, context, bodies) {
    var body = bodies.block,
        skip = bodies['else'];
  
    if (dust.isEmpty(elem)) {
      if (body) return body(this, context);
    } else if (skip) {
      return skip(this, context);
    }
    return this;
  }
  
  Chunk.prototype.block = function(elem, context, bodies) {
    var body = bodies.block;
  
    if (elem) {
      body = elem;
    }
  
    if (body) {
      return body(this, context);
    }
    return this;
  };
  
  Chunk.prototype.partial = function(elem, context) {
    if (typeof elem === "function") {
      return this.capture(elem, context, function(name, chunk) {
        dust.load(name, chunk, context).end();
      });
    }
    return dust.load(elem, this, context);
  };
  
  Chunk.prototype.helper = function(name, context, bodies, params) {
    return dust.helpers[name](this, context, bodies, params);
  };
  
  Chunk.prototype.capture = function(body, context, callback) {
    return this.map(function(chunk) {
      var stub = new Stub(function(err, out) {
        if (err) {
          chunk.setError(err);
        } else {
          callback(out, chunk);
        }
      });
      body(stub.head, context).end();
    });
  };
  
  Chunk.prototype.setError = function(err) {
    this.error = err;
    this.root.flush();
    return this;
  };
  
  function Tap(head, tail) {
    this.head = head;
    this.tail = tail;
  }
  
  Tap.prototype.push = function(tap) {
    return new Tap(tap, this);
  };
  
  Tap.prototype.go = function(value) {
    var tap = this;
  
    while(tap) {
      value = tap.head(value);
      tap = tap.tail;
    }
    return value;
  };
  
  var HCHARS = new RegExp(/[&<>\"]/),
      AMP    = /&/g,
      LT     = /</g,
      GT     = />/g,
      QUOT   = /\"/g;
  
  dust.escapeHtml = function(s) {
    if (typeof s === "string") {
      if (!HCHARS.test(s)) {
        return s;
      }
      return s.replace(AMP,'&amp;').replace(LT,'&lt;').replace(GT,'&gt;').replace(QUOT,'&quot;');
    }
    return s;
  };
  
  var BS = /\\/g,
      CR = /\r/g,
      LS = /\u2028/g,
      PS = /\u2029/g,
      NL = /\n/g,
      LF = /\f/g,
      SQ = /'/g,
      DQ = /"/g,
      TB = /\t/g;
  
  dust.escapeJs = function(s) {
    if (typeof s === "string") {
      return s
        .replace(BS, '\\\\')
        .replace(DQ, '\\"')
        .replace(SQ, "\\'")
        .replace(CR, '\\r')
        .replace(LS, '\\u2028')
        .replace(PS, '\\u2029')
        .replace(NL, '\\n')
        .replace(LF, '\\f')
        .replace(TB, "\\t");
    }
    return s;
  };
  
  })(dust);
  
  if (typeof exports !== "undefined") {
    dust.helpers = require("./dust-helpers").helpers;
    if (typeof process !== "undefined") {
        require('./server')(dust);
    }
    module.exports = dust;
  }
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