| Index: chrome/third_party/jstemplate/jstemplate.js
|
| ===================================================================
|
| --- chrome/third_party/jstemplate/jstemplate.js (revision 177458)
|
| +++ chrome/third_party/jstemplate/jstemplate.js (working copy)
|
| @@ -1,967 +0,0 @@
|
| -// 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_;
|
| -};
|
|
|