Move chrome\third_party\jstemplate to third_party\jstemplate since it's used from ui\.

chrome/third_party/jstemplate/jstemplate.js

-// Copyright 2006 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-// implied. See the License for the specific language governing
-// permissions and limitations under the License.
-/**
- * Author: Steffen Meschkat <mesch@google.com>
- *
- * @fileoverview A simple formatter to project JavaScript data into
- * HTML templates. The template is edited in place. I.e. in order to
- * instantiate a template, clone it from the DOM first, and then
- * process the cloned template. This allows for updating of templates:
- * If the templates is processed again, changed values are merely
- * updated.
- *
- * NOTE(mesch): IE DOM doesn't have importNode().
- *
- * NOTE(mesch): The property name "length" must not be used in input
- * data, see comment in jstSelect_().
- */
-
-
-/**
- * Names of jstemplate attributes. These attributes are attached to
- * normal HTML elements and bind expression context data to the HTML
- * fragment that is used as template.
- */
-var ATT_select = 'jsselect';
-var ATT_instance = 'jsinstance';
-var ATT_display = 'jsdisplay';
-var ATT_values = 'jsvalues';
-var ATT_vars = 'jsvars';
-var ATT_eval = 'jseval';
-var ATT_transclude = 'transclude';
-var ATT_content = 'jscontent';
-var ATT_skip = 'jsskip';
-
-
-/**
- * Name of the attribute that caches a reference to the parsed
- * template processing attribute values on a template node.
- */
-var ATT_jstcache = 'jstcache';
-
-
-/**
- * Name of the property that caches the parsed template processing
- * attribute values on a template node.
- */
-var PROP_jstcache = '__jstcache';
-
-
-/**
- * ID of the element that contains dynamically loaded jstemplates.
- */
-var STRING_jsts = 'jsts';
-
-
-/**
- * Un-inlined string literals, to avoid object creation in
- * IE6.
- */
-var CHAR_asterisk = '*';
-var CHAR_dollar = '$';
-var CHAR_period = '.';
-var CHAR_ampersand = '&';
-var STRING_div = 'div';
-var STRING_id = 'id';
-var STRING_asteriskzero = '*0';
-var STRING_zero = '0';
-
-
-/**
- * HTML template processor. Data values are bound to HTML templates
- * using the attributes transclude, jsselect, jsdisplay, jscontent,
- * jsvalues. The template is modifed in place. The values of those
- * attributes are JavaScript expressions that are evaluated in the
- * context of the data object fragment.
- *
- * @param {JsEvalContext} context Context created from the input data
- * object.
- *
- * @param {Element} template DOM node of the template. This will be
- * processed in place. After processing, it will still be a valid
- * template that, if processed again with the same data, will remain
- * unchanged.
- *
- * @param {boolean} opt_debugging Optional flag to collect debugging
- *     information while processing the template.  Only takes effect
- *     in MAPS_DEBUG.
- */
-function jstProcess(context, template, opt_debugging) {
-  var processor = new JstProcessor;
-  JstProcessor.prepareTemplate_(template);
-
-  /**
-   * Caches the document of the template node, so we don't have to
-   * access it through ownerDocument.
-   * @type Document
-   */
-  processor.document_ = ownerDocument(template);
-
-  processor.run_(bindFully(processor, processor.jstProcessOuter_,
-                           context, template));
-}
-
-
-/**
- * Internal class used by jstemplates to maintain context.  This is
- * necessary to process deep templates in Safari which has a
- * relatively shallow maximum recursion depth of 100.
- * @class
- * @constructor
- */
-function JstProcessor() {
-}
-
-
-/**
- * Counter to generate node ids. These ids will be stored in
- * ATT_jstcache and be used to lookup the preprocessed js attributes
- * from the jstcache_. The id is stored in an attribute so it
- * suvives cloneNode() and thus cloned template nodes can share the
- * same cache entry.
- * @type number
- */
-JstProcessor.jstid_ = 0;
-
-
-/**
- * Map from jstid to processed js attributes.
- * @type Object
- */
-JstProcessor.jstcache_ = {};
-
-/**
- * The neutral cache entry. Used for all nodes that don't have any
- * jst attributes. We still set the jsid attribute on those nodes so
- * we can avoid to look again for all the other jst attributes that
- * aren't there. Remember: not only the processing of the js
- * attribute values is expensive and we thus want to cache it. The
- * access to the attributes on the Node in the first place is
- * expensive too.
- */
-JstProcessor.jstcache_[0] = {};
-
-
-/**
- * Map from concatenated attribute string to jstid.
- * The key is the concatenation of all jst atributes found on a node
- * formatted as "name1=value1&name2=value2&...", in the order defined by
- * JST_ATTRIBUTES. The value is the id of the jstcache_ entry that can
- * be used for this node. This allows the reuse of cache entries in cases
- * when a cached entry already exists for a given combination of attribute
- * values. (For example when two different nodes in a template share the same
- * JST attributes.)
- * @type Object
- */
-JstProcessor.jstcacheattributes_ = {};
-
-
-/**
- * Map for storing temporary attribute values in prepareNode_() so they don't
- * have to be retrieved twice. (IE6 perf)
- * @type Object
- */
-JstProcessor.attributeValues_ = {};
-
-
-/**
- * A list for storing non-empty attributes found on a node in prepareNode_().
- * The array is global since it can be reused - this way there is no need to
- * construct a new array object for each invocation. (IE6 perf)
- * @type Array
- */
-JstProcessor.attributeList_ = [];
-
-
-/**
- * Prepares the template: preprocesses all jstemplate attributes.
- *
- * @param {Element} template
- */
-JstProcessor.prepareTemplate_ = function(template) {
-  if (!template[PROP_jstcache]) {
-    domTraverseElements(template, function(node) {
-      JstProcessor.prepareNode_(node);
-    });
-  }
-};
-
-
-/**
- * A list of attributes we use to specify jst processing instructions,
- * and the functions used to parse their values.
- *
- * @type Array.<Array>
- */
-var JST_ATTRIBUTES = [
-    [ ATT_select, jsEvalToFunction ],
-    [ ATT_display, jsEvalToFunction ],
-    [ ATT_values, jsEvalToValues ],
-    [ ATT_vars, jsEvalToValues ],
-    [ ATT_eval, jsEvalToExpressions ],
-    [ ATT_transclude, jsEvalToSelf ],
-    [ ATT_content, jsEvalToFunction ],
-    [ ATT_skip, jsEvalToFunction ]
-];
-
-
-/**
- * Prepares a single node: preprocesses all template attributes of the
- * node, and if there are any, assigns a jsid attribute and stores the
- * preprocessed attributes under the jsid in the jstcache.
- *
- * @param {Element} node
- *
- * @return {Object} The jstcache entry. The processed jst attributes
- * are properties of this object. If the node has no jst attributes,
- * returns an object with no properties (the jscache_[0] entry).
- */
-JstProcessor.prepareNode_ = function(node) {
-  // If the node already has a cache property, return it.
-  if (node[PROP_jstcache]) {
-    return node[PROP_jstcache];
-  }
-
-  // If it is not found, we always set the PROP_jstcache property on the node.
-  // Accessing the property is faster than executing getAttribute(). If we
-  // don't find the property on a node that was cloned in jstSelect_(), we
-  // will fall back to check for the attribute and set the property
-  // from cache.
-
-  // If the node has an attribute indexing a cache object, set it as a property
-  // and return it.
-  var jstid = domGetAttribute(node, ATT_jstcache);
-  if (jstid != null) {
-    return node[PROP_jstcache] = JstProcessor.jstcache_[jstid];
-  }
-
-  var attributeValues = JstProcessor.attributeValues_;
-  var attributeList = JstProcessor.attributeList_;
-  attributeList.length = 0;
-
-  // Look for interesting attributes.
-  for (var i = 0, I = jsLength(JST_ATTRIBUTES); i < I; ++i) {
-    var name = JST_ATTRIBUTES[i][0];
-    var value = domGetAttribute(node, name);
-    attributeValues[name] = value;
-    if (value != null) {
-      attributeList.push(name + "=" + value);
-    }
-  }
-
-  // If none found, mark this node to prevent further inspection, and return
-  // an empty cache object.
-  if (attributeList.length == 0) {
-    domSetAttribute(node, ATT_jstcache, STRING_zero);
-    return node[PROP_jstcache] = JstProcessor.jstcache_[0];
-  }
-
-  // If we already have a cache object corresponding to these attributes,
-  // annotate the node with it, and return it.
-  var attstring = attributeList.join(CHAR_ampersand);
-  if (jstid = JstProcessor.jstcacheattributes_[attstring]) {
-    domSetAttribute(node, ATT_jstcache, jstid);
-    return node[PROP_jstcache] = JstProcessor.jstcache_[jstid];
-  }
-
-  // Otherwise, build a new cache object.
-  var jstcache = {};
-  for (var i = 0, I = jsLength(JST_ATTRIBUTES); i < I; ++i) {
-    var att = JST_ATTRIBUTES[i];
-    var name = att[0];
-    var parse = att[1];
-    var value = attributeValues[name];
-    if (value != null) {
-      jstcache[name] = parse(value);
-    }
-  }
-
-  jstid = STRING_empty + ++JstProcessor.jstid_;
-  domSetAttribute(node, ATT_jstcache, jstid);
-  JstProcessor.jstcache_[jstid] = jstcache;
-  JstProcessor.jstcacheattributes_[attstring] = jstid;
-
-  return node[PROP_jstcache] = jstcache;
-};
-
-
-/**
- * Runs the given function in our state machine.
- *
- * It's informative to view the set of all function calls as a tree:
- * - nodes are states
- * - edges are state transitions, implemented as calls to the pending
- *   functions in the stack.
- *   - pre-order function calls are downward edges (recursion into call).
- *   - post-order function calls are upward edges (return from call).
- * - leaves are nodes which do not recurse.
- * We represent the call tree as an array of array of calls, indexed as
- * stack[depth][index].  Here [depth] indexes into the call stack, and
- * [index] indexes into the call queue at that depth.  We require a call
- * queue so that a node may branch to more than one child
- * (which will be called serially), typically due to a loop structure.
- *
- * @param {Function} f The first function to run.
- */
-JstProcessor.prototype.run_ = function(f) {
-  var me = this;
-
-  /**
-   * A stack of queues of pre-order calls.
-   * The inner arrays (constituent queues) are structured as
-   * [ arg2, arg1, method, arg2, arg1, method, ...]
-   * ie. a flattened array of methods with 2 arguments, in reverse order
-   * for efficient push/pop.
-   *
-   * The outer array is a stack of such queues.
-   *
-   * @type Array.<Array>
-   */
-  var calls = me.calls_ = [];
-
-  /**
-   * The index into the queue for each depth. NOTE: Alternative would
-   * be to maintain the queues in reverse order (popping off of the
-   * end) but the repeated calls to .pop() consumed 90% of this
-   * function's execution time.
-   * @type Array.<number>
-   */
-  var queueIndices = me.queueIndices_ = [];
-
-  /**
-   * A pool of empty arrays.  Minimizes object allocation for IE6's benefit.
-   * @type Array.<Array>
-   */
-  var arrayPool = me.arrayPool_ = [];
-
-  f();
-  var queue, queueIndex;
-  var method, arg1, arg2;
-  var temp;
-  while (calls.length) {
-    queue = calls[calls.length - 1];
-    queueIndex = queueIndices[queueIndices.length - 1];
-    if (queueIndex >= queue.length) {
-      me.recycleArray_(calls.pop());
-      queueIndices.pop();
-      continue;
-    }
-
-    // Run the first function in the queue.
-    method = queue[queueIndex++];
-    arg1 = queue[queueIndex++];
-    arg2 = queue[queueIndex++];
-    queueIndices[queueIndices.length - 1] = queueIndex;
-    method.call(me, arg1, arg2);
-  }
-};
-
-
-/**
- * Pushes one or more functions onto the stack.  These will be run in sequence,
- * interspersed with any recursive calls that they make.
- *
- * This method takes ownership of the given array!
- *
- * @param {Array} args Array of method calls structured as
- *     [ method, arg1, arg2, method, arg1, arg2, ... ]
- */
-JstProcessor.prototype.push_ = function(args) {
-  this.calls_.push(args);
-  this.queueIndices_.push(0);
-};
-
-
-/**
- * Enable/disable debugging.
- * @param {boolean} debugging New state
- */
-JstProcessor.prototype.setDebugging = function(debugging) {
-};
-
-
-JstProcessor.prototype.createArray_ = function() {
-  if (this.arrayPool_.length) {
-    return this.arrayPool_.pop();
-  } else {
-    return [];
-  }
-};
-
-
-JstProcessor.prototype.recycleArray_ = function(array) {
-  arrayClear(array);
-  this.arrayPool_.push(array);
-};
-
-/**
- * Implements internals of jstProcess. This processes the two
- * attributes transclude and jsselect, which replace or multiply
- * elements, hence the name "outer". The remainder of the attributes
- * is processed in jstProcessInner_(), below. That function
- * jsProcessInner_() only processes attributes that affect an existing
- * node, but doesn't create or destroy nodes, hence the name
- * "inner". jstProcessInner_() is called through jstSelect_() if there
- * is a jsselect attribute (possibly for newly created clones of the
- * current template node), or directly from here if there is none.
- *
- * @param {JsEvalContext} context
- *
- * @param {Element} template
- */
-JstProcessor.prototype.jstProcessOuter_ = function(context, template) {
-  var me = this;
-
-  var jstAttributes = me.jstAttributes_(template);
-
-  var transclude = jstAttributes[ATT_transclude];
-  if (transclude) {
-    var tr = jstGetTemplate(transclude);
-    if (tr) {
-      domReplaceChild(tr, template);
-      var call = me.createArray_();
-      call.push(me.jstProcessOuter_, context, tr);
-      me.push_(call);
-    } else {
-      domRemoveNode(template);
-    }
-    return;
-  }
-
-  var select = jstAttributes[ATT_select];
-  if (select) {
-    me.jstSelect_(context, template, select);
-  } else {
-    me.jstProcessInner_(context, template);
-  }
-};
-
-
-/**
- * Implements internals of jstProcess. This processes all attributes
- * except transclude and jsselect. It is called either from
- * jstSelect_() for nodes that have a jsselect attribute so that the
- * jsselect attribute will not be processed again, or else directly
- * from jstProcessOuter_(). See the comment on jstProcessOuter_() for
- * an explanation of the name.
- *
- * @param {JsEvalContext} context
- *
- * @param {Element} template
- */
-JstProcessor.prototype.jstProcessInner_ = function(context, template) {
-  var me = this;
-
-  var jstAttributes = me.jstAttributes_(template);
-
-  // NOTE(mesch): See NOTE on ATT_content why this is a separate
-  // attribute, and not a special value in ATT_values.
-  var display = jstAttributes[ATT_display];
-  if (display) {
-    var shouldDisplay = context.jsexec(display, template);
-    if (!shouldDisplay) {
-      displayNone(template);
-      return;
-    }
-    displayDefault(template);
-  }
-
-  // NOTE(mesch): jsvars is evaluated before jsvalues, because it's
-  // more useful to be able to use var values in attribute value
-  // expressions than vice versa.
-  var values = jstAttributes[ATT_vars];
-  if (values) {
-    me.jstVars_(context, template, values);
-  }
-
-  values = jstAttributes[ATT_values];
-  if (values) {
-    me.jstValues_(context, template, values);
-  }
-
-  // Evaluate expressions immediately. Useful for hooking callbacks
-  // into jstemplates.
-  //
-  // NOTE(mesch): Evaluation order is sometimes significant, e.g. when
-  // the expression evaluated in jseval relies on the values set in
-  // jsvalues, so it needs to be evaluated *after*
-  // jsvalues. TODO(mesch): This is quite arbitrary, it would be
-  // better if this would have more necessity to it.
-  var expressions = jstAttributes[ATT_eval];
-  if (expressions) {
-    for (var i = 0, I = jsLength(expressions); i < I; ++i) {
-      context.jsexec(expressions[i], template);
-    }
-  }
-
-  var skip = jstAttributes[ATT_skip];
-  if (skip) {
-    var shouldSkip = context.jsexec(skip, template);
-    if (shouldSkip) return;
-  }
-
-  // NOTE(mesch): content is a separate attribute, instead of just a
-  // special value mentioned in values, for two reasons: (1) it is
-  // fairly common to have only mapped content, and writing
-  // content="expr" is shorter than writing values="content:expr", and
-  // (2) the presence of content actually terminates traversal, and we
-  // need to check for that. Display is a separate attribute for a
-  // reason similar to the second, in that its presence *may*
-  // terminate traversal.
-  var content = jstAttributes[ATT_content];
-  if (content) {
-    me.jstContent_(context, template, content);
-
-  } else {
-    // Newly generated children should be ignored, so we explicitly
-    // store the children to be processed.
-    var queue = me.createArray_();
-    for (var c = template.firstChild; c; c = c.nextSibling) {
-      if (c.nodeType == DOM_ELEMENT_NODE) {
-        queue.push(me.jstProcessOuter_, context, c);
-      }
-    }
-    if (queue.length) me.push_(queue);
-  }
-};
-
-
-/**
- * Implements the jsselect attribute: evalutes the value of the
- * jsselect attribute in the current context, with the current
- * variable bindings (see JsEvalContext.jseval()). If the value is an
- * array, the current template node is multiplied once for every
- * element in the array, with the array element being the context
- * object. If the array is empty, or the value is undefined, then the
- * current template node is dropped. If the value is not an array,
- * then it is just made the context object.
- *
- * @param {JsEvalContext} context The current evaluation context.
- *
- * @param {Element} template The currently processed node of the template.
- *
- * @param {Function} select The javascript expression to evaluate.
- *
- * @notypecheck FIXME(hmitchell): See OCL6434950. instance and value need
- * type checks.
- */
-JstProcessor.prototype.jstSelect_ = function(context, template, select) {
-  var me = this;
-
-  var value = context.jsexec(select, template);
-
-  // Enable reprocessing: if this template is reprocessed, then only
-  // fill the section instance here. Otherwise do the cardinal
-  // processing of a new template.
-  var instance = domGetAttribute(template, ATT_instance);
-
-  var instanceLast = false;
-  if (instance) {
-    if (instance.charAt(0) == CHAR_asterisk) {
-      instance = parseInt10(instance.substr(1));
-      instanceLast = true;
-    } else {
-      instance = parseInt10(/** @type string */(instance));
-    }
-  }
-
-  // The expression value instanceof Array is occasionally false for
-  // arrays, seen in Firefox. Thus we recognize an array as an object
-  // which is not null that has a length property. Notice that this
-  // also matches input data with a length property, so this property
-  // name should be avoided in input data.
-  var multiple = isArray(value);
-  var count = multiple ? jsLength(value) : 1;
-  var multipleEmpty = (multiple && count == 0);
-
-  if (multiple) {
-    if (multipleEmpty) {
-      // For an empty array, keep the first template instance and mark
-      // it last. Remove all other template instances.
-      if (!instance) {
-        domSetAttribute(template, ATT_instance, STRING_asteriskzero);
-        displayNone(template);
-      } else {
-        domRemoveNode(template);
-      }
-
-    } else {
-      displayDefault(template);
-      // For a non empty array, create as many template instances as
-      // are needed. If the template is first processed, as many
-      // template instances are needed as there are values in the
-      // array. If the template is reprocessed, new template instances
-      // are only needed if there are more array values than template
-      // instances. Those additional instances are created by
-      // replicating the last template instance.
-      //
-      // When the template is first processed, there is no jsinstance
-      // attribute. This is indicated by instance === null, except in
-      // opera it is instance === "". Notice also that the === is
-      // essential, because 0 == "", presumably via type coercion to
-      // boolean.
-      if (instance === null || instance === STRING_empty ||
-          (instanceLast && instance < count - 1)) {
-        // A queue of calls to push.
-        var queue = me.createArray_();
-
-        var instancesStart = instance || 0;
-        var i, I, clone;
-        for (i = instancesStart, I = count - 1; i < I; ++i) {
-          var node = domCloneNode(template);
-          domInsertBefore(node, template);
-
-          jstSetInstance(/** @type Element */(node), value, i);
-          clone = context.clone(value[i], i, count);
-
-          queue.push(me.jstProcessInner_, clone, node,
-                     JsEvalContext.recycle, clone, null);
-
-        }
-        // Push the originally present template instance last to keep
-        // the order aligned with the DOM order, because the newly
-        // created template instances are inserted *before* the
-        // original instance.
-        jstSetInstance(template, value, i);
-        clone = context.clone(value[i], i, count);
-        queue.push(me.jstProcessInner_, clone, template,
-                   JsEvalContext.recycle, clone, null);
-        me.push_(queue);
-      } else if (instance < count) {
-        var v = value[instance];
-
-        jstSetInstance(template, value, instance);
-        var clone = context.clone(v, instance, count);
-        var queue = me.createArray_();
-        queue.push(me.jstProcessInner_, clone, template,
-                   JsEvalContext.recycle, clone, null);
-        me.push_(queue);
-      } else {
-        domRemoveNode(template);
-      }
-    }
-  } else {
-    if (value == null) {
-      displayNone(template);
-    } else {
-      displayDefault(template);
-      var clone = context.clone(value, 0, 1);
-      var queue = me.createArray_();
-      queue.push(me.jstProcessInner_, clone, template,
-                 JsEvalContext.recycle, clone, null);
-      me.push_(queue);
-    }
-  }
-};
-
-
-/**
- * Implements the jsvars attribute: evaluates each of the values and
- * assigns them to variables in the current context. Similar to
- * jsvalues, except that all values are treated as vars, independent
- * of their names.
- *
- * @param {JsEvalContext} context Current evaluation context.
- *
- * @param {Element} template Currently processed template node.
- *
- * @param {Array} values Processed value of the jsvalues attribute: a
- * flattened array of pairs. The second element in the pair is a
- * function that can be passed to jsexec() for evaluation in the
- * current jscontext, and the first element is the variable name that
- * the value returned by jsexec is assigned to.
- */
-JstProcessor.prototype.jstVars_ = function(context, template, values) {
-  for (var i = 0, I = jsLength(values); i < I; i += 2) {
-    var label = values[i];
-    var value = context.jsexec(values[i+1], template);
-    context.setVariable(label, value);
-  }
-};
-
-
-/**
- * Implements the jsvalues attribute: evaluates each of the values and
- * assigns them to variables in the current context (if the name
- * starts with '$', javascript properties of the current template node
- * (if the name starts with '.'), or DOM attributes of the current
- * template node (otherwise). Since DOM attribute values are always
- * strings, the value is coerced to string in the latter case,
- * otherwise it's the uncoerced javascript value.
- *
- * @param {JsEvalContext} context Current evaluation context.
- *
- * @param {Element} template Currently processed template node.
- *
- * @param {Array} values Processed value of the jsvalues attribute: a
- * flattened array of pairs. The second element in the pair is a
- * function that can be passed to jsexec() for evaluation in the
- * current jscontext, and the first element is the label that
- * determines where the value returned by jsexec is assigned to.
- */
-JstProcessor.prototype.jstValues_ = function(context, template, values) {
-  for (var i = 0, I = jsLength(values); i < I; i += 2) {
-    var label = values[i];
-    var value = context.jsexec(values[i+1], template);
-
-    if (label.charAt(0) == CHAR_dollar) {
-      // A jsvalues entry whose name starts with $ sets a local
-      // variable.
-      context.setVariable(label, value);
-
-    } else if (label.charAt(0) == CHAR_period) {
-      // A jsvalues entry whose name starts with . sets a property of
-      // the current template node. The name may have further dot
-      // separated components, which are translated into namespace
-      // objects. This specifically allows to set properties on .style
-      // using jsvalues. NOTE(mesch): Setting the style attribute has
-      // no effect in IE and hence should not be done anyway.
-      var nameSpaceLabel = label.substr(1).split(CHAR_period);
-      var nameSpaceObject = template;
-      var nameSpaceDepth = jsLength(nameSpaceLabel);
-      for (var j = 0, J = nameSpaceDepth - 1; j < J; ++j) {
-        var jLabel = nameSpaceLabel[j];
-        if (!nameSpaceObject[jLabel]) {
-          nameSpaceObject[jLabel] = {};
-        }
-        nameSpaceObject = nameSpaceObject[jLabel];
-      }
-      nameSpaceObject[nameSpaceLabel[nameSpaceDepth - 1]] = value;
-
-    } else if (label) {
-      // Any other jsvalues entry sets an attribute of the current
-      // template node.
-      if (typeof value == TYPE_boolean) {
-        // Handle boolean values that are set as attributes specially,
-        // according to the XML/HTML convention.
-        if (value) {
-          domSetAttribute(template, label, label);
-        } else {
-          domRemoveAttribute(template, label);
-        }
-      } else {
-        domSetAttribute(template, label, STRING_empty + value);
-      }
-    }
-  }
-};
-
-
-/**
- * Implements the jscontent attribute. Evalutes the expression in
- * jscontent in the current context and with the current variables,
- * and assigns its string value to the content of the current template
- * node.
- *
- * @param {JsEvalContext} context Current evaluation context.
- *
- * @param {Element} template Currently processed template node.
- *
- * @param {Function} content Processed value of the jscontent
- * attribute.
- */
-JstProcessor.prototype.jstContent_ = function(context, template, content) {
-  // NOTE(mesch): Profiling shows that this method costs significant
-  // time. In jstemplate_perf.html, it's about 50%. I tried to replace
-  // by HTML escaping and assignment to innerHTML, but that was even
-  // slower.
-  var value = STRING_empty + context.jsexec(content, template);
-  // Prevent flicker when refreshing a template and the value doesn't
-  // change.
-  if (template.innerHTML == value) {
-    return;
-  }
-  while (template.firstChild) {
-    domRemoveNode(template.firstChild);
-  }
-  var t = domCreateTextNode(this.document_, value);
-  domAppendChild(template, t);
-};
-
-
-/**
- * Caches access to and parsing of template processing attributes. If
- * domGetAttribute() is called every time a template attribute value
- * is used, it takes more than 10% of the time.
- *
- * @param {Element} template A DOM element node of the template.
- *
- * @return {Object} A javascript object that has all js template
- * processing attribute values of the node as properties.
- */
-JstProcessor.prototype.jstAttributes_ = function(template) {
-  if (template[PROP_jstcache]) {
-    return template[PROP_jstcache];
-  }
-
-  var jstid = domGetAttribute(template, ATT_jstcache);
-  if (jstid) {
-    return template[PROP_jstcache] = JstProcessor.jstcache_[jstid];
-  }
-
-  return JstProcessor.prepareNode_(template);
-};
-
-
-/**
- * Helps to implement the transclude attribute, and is the initial
- * call to get hold of a template from its ID.
- *
- * If the ID is not present in the DOM, and opt_loadHtmlFn is specified, this
- * function will call that function and add the result to the DOM, before
- * returning the template.
- *
- * @param {string} name The ID of the HTML element used as template.
- * @param {Function} opt_loadHtmlFn A function which, when called, will return
- *   HTML that contains an element whose ID is 'name'.
- *
- * @return {Element|null} The DOM node of the template. (Only element nodes
- * can be found by ID, hence it's a Element.)
- */
-function jstGetTemplate(name, opt_loadHtmlFn) {
-  var doc = document;
-  var section;
-  if (opt_loadHtmlFn) {
-    section = jstLoadTemplateIfNotPresent(doc, name, opt_loadHtmlFn);
-  } else {
-    section = domGetElementById(doc, name);
-  }
-  if (section) {
-    JstProcessor.prepareTemplate_(section);
-    var ret = domCloneElement(section);
-    domRemoveAttribute(ret, STRING_id);
-    return ret;
-  } else {
-    return null;
-  }
-}
-
-/**
- * This function is the same as 'jstGetTemplate' but, if the template
- * does not exist, throw an exception.
- *
- * @param {string} name The ID of the HTML element used as template.
- * @param {Function} opt_loadHtmlFn A function which, when called, will return
- *   HTML that contains an element whose ID is 'name'.
- *
- * @return {Element} The DOM node of the template. (Only element nodes
- * can be found by ID, hence it's a Element.)
- */
-function jstGetTemplateOrDie(name, opt_loadHtmlFn) {
-  var x = jstGetTemplate(name, opt_loadHtmlFn);
-  check(x !== null);
-  return /** @type Element */(x);
-}
-
-
-/**
- * If an element with id 'name' is not present in the document, call loadHtmlFn
- * and insert the result into the DOM.
- *
- * @param {Document} doc
- * @param {string} name
- * @param {Function} loadHtmlFn A function that returns HTML to be inserted
- * into the DOM.
- * @param {string} opt_target The id of a DOM object under which to attach the
- *   HTML once it's inserted.  An object with this id is created if it does not
- *   exist.
- * @return {Element} The node whose id is 'name'
- */
-function jstLoadTemplateIfNotPresent(doc, name, loadHtmlFn, opt_target) {
-  var section = domGetElementById(doc, name);
-  if (section) {
-    return section;
-  }
-  // Load any necessary HTML and try again.
-  jstLoadTemplate_(doc, loadHtmlFn(), opt_target || STRING_jsts);
-  var section = domGetElementById(doc, name);
-  if (!section) {
-    log("Error: jstGetTemplate was provided with opt_loadHtmlFn, " +
-        "but that function did not provide the id '" + name + "'.");
-  }
-  return /** @type Element */(section);
-}
-
-
-/**
- * Loads the given HTML text into the given document, so that
- * jstGetTemplate can find it.
- *
- * We append it to the element identified by targetId, which is hidden.
- * If it doesn't exist, it is created.
- *
- * @param {Document} doc The document to create the template in.
- *
- * @param {string} html HTML text to be inserted into the document.
- *
- * @param {string} targetId The id of a DOM object under which to attach the
- *   HTML once it's inserted.  An object with this id is created if it does not
- *   exist.
- */
-function jstLoadTemplate_(doc, html, targetId) {
-  var existing_target = domGetElementById(doc, targetId);
-  var target;
-  if (!existing_target) {
-    target = domCreateElement(doc, STRING_div);
-    target.id = targetId;
-    displayNone(target);
-    positionAbsolute(target);
-    domAppendChild(doc.body, target);
-  } else {
-    target = existing_target;
-  }
-  var div = domCreateElement(doc, STRING_div);
-  target.appendChild(div);
-  div.innerHTML = html;
-}
-
-
-/**
- * Sets the jsinstance attribute on a node according to its context.
- *
- * @param {Element} template The template DOM node to set the instance
- * attribute on.
- *
- * @param {Array} values The current input context, the array of
- * values of which the template node will render one instance.
- *
- * @param {number} index The index of this template node in values.
- */
-function jstSetInstance(template, values, index) {
-  if (index == jsLength(values) - 1) {
-    domSetAttribute(template, ATT_instance, CHAR_asterisk + index);
-  } else {
-    domSetAttribute(template, ATT_instance, STRING_empty + index);
-  }
-}
-
-
-/**
- * Log the current state.
- * @param {string} caller An identifier for the caller of .log_.
- * @param {Element} template The template node being processed.
- * @param {Object} jstAttributeValues The jst attributes of the template node.
- */
-JstProcessor.prototype.logState_ = function(
-    caller, template, jstAttributeValues) {
-};
-
-
-/**
- * Retrieve the processing logs.
- * @return {Array.<string>} The processing logs.
- */
-JstProcessor.prototype.getLogs = function() {
-  return this.logs_;
-};