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JavaScript
/*
* Copyright 2008 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.
*/
/**
* @fileoverview
* Utility functions and classes for Soy.
*
* <p>
* The top portion of this file contains utilities for Soy users:<ul>
* <li> soy.StringBuilder: Compatible with the 'stringbuilder' code style.
* <li> soy.renderElement: Render template and set as innerHTML of an element.
* <li> soy.renderAsFragment: Render template and return as HTML fragment.
* </ul>
*
* <p>
* The bottom portion of this file contains utilities that should only be called
* by Soy-generated JS code. Please do not use these functions directly from
* your hand-writen code. Their names all start with '$$'.
*
* @author Garrett Boyer
* @author Mike Samuel
* @author Kai Huang
* @author Aharon Lanin
*/
// COPIED FROM nogoog_shim.js
// Create closure namespaces.
var goog = goog || {};
goog.DEBUG = false;
goog.inherits = function(childCtor, parentCtor) {
/** @constructor */
function tempCtor() {}
tempCtor.prototype = parentCtor.prototype;
childCtor.superClass_ = parentCtor.prototype;
childCtor.prototype = new tempCtor();
childCtor.prototype.constructor = childCtor;
};
// Just enough browser detection for this file.
if (!goog.userAgent) {
goog.userAgent = (function() {
var userAgent = "";
if ("undefined" !== typeof navigator && navigator
&& "string" == typeof navigator.userAgent) {
userAgent = navigator.userAgent;
}
var isOpera = userAgent.indexOf('Opera') == 0;
return {
jscript: {
/**
* @type {boolean}
*/
HAS_JSCRIPT: 'ScriptEngine' in this
},
/**
* @type {boolean}
*/
OPERA: isOpera,
/**
* @type {boolean}
*/
IE: !isOpera && userAgent.indexOf('MSIE') != -1,
/**
* @type {boolean}
*/
WEBKIT: !isOpera && userAgent.indexOf('WebKit') != -1
};
})();
}
if (!goog.asserts) {
goog.asserts = {
/**
* @param {*} condition Condition to check.
*/
assert: function (condition) {
if (!condition) {
throw Error('Assertion error');
}
},
/**
* @param {...*} var_args
*/
fail: function (var_args) {}
};
}
// Stub out the document wrapper used by renderAs*.
if (!goog.dom) {
goog.dom = {};
/**
* @param {Document=} d
* @constructor
*/
goog.dom.DomHelper = function(d) {
this.document_ = d || document;
};
/**
* @return {!Document}
*/
goog.dom.DomHelper.prototype.getDocument = function() {
return this.document_;
};
/**
* Creates a new element.
* @param {string} name Tag name.
* @return {!Element}
*/
goog.dom.DomHelper.prototype.createElement = function(name) {
return this.document_.createElement(name);
};
/**
* Creates a new document fragment.
* @return {!DocumentFragment}
*/
goog.dom.DomHelper.prototype.createDocumentFragment = function() {
return this.document_.createDocumentFragment();
};
}
if (!goog.format) {
goog.format = {
insertWordBreaks: function(str, maxCharsBetweenWordBreaks) {
str = String(str);
var resultArr = [];
var resultArrLen = 0;
// These variables keep track of important state inside str.
var isInTag = false; // whether we're inside an HTML tag
var isMaybeInEntity = false; // whether we might be inside an HTML entity
var numCharsWithoutBreak = 0; // number of chars since last word break
var flushIndex = 0; // index of first char not yet flushed to resultArr
for (var i = 0, n = str.length; i < n; ++i) {
var charCode = str.charCodeAt(i);
// If hit maxCharsBetweenWordBreaks, and not space next, then add <wbr>.
if (numCharsWithoutBreak >= maxCharsBetweenWordBreaks &&
// space
charCode != 32) {
resultArr[resultArrLen++] = str.substring(flushIndex, i);
flushIndex = i;
resultArr[resultArrLen++] = goog.format.WORD_BREAK;
numCharsWithoutBreak = 0;
}
if (isInTag) {
// If inside an HTML tag and we see '>', it's the end of the tag.
if (charCode == 62) {
isInTag = false;
}
} else if (isMaybeInEntity) {
switch (charCode) {
// Inside an entity, a ';' is the end of the entity.
// The entity that just ended counts as one char, so increment
// numCharsWithoutBreak.
case 59: // ';'
isMaybeInEntity = false;
++numCharsWithoutBreak;
break;
// If maybe inside an entity and we see '<', we weren't actually in
// an entity. But now we're inside and HTML tag.
case 60: // '<'
isMaybeInEntity = false;
isInTag = true;
break;
// If maybe inside an entity and we see ' ', we weren't actually in
// an entity. Just correct the state and reset the
// numCharsWithoutBreak since we just saw a space.
case 32: // ' '
isMaybeInEntity = false;
numCharsWithoutBreak = 0;
break;
}
} else { // !isInTag && !isInEntity
switch (charCode) {
// When not within a tag or an entity and we see '<', we're now
// inside an HTML tag.
case 60: // '<'
isInTag = true;
break;
// When not within a tag or an entity and we see '&', we might be
// inside an entity.
case 38: // '&'
isMaybeInEntity = true;
break;
// When we see a space, reset the numCharsWithoutBreak count.
case 32: // ' '
numCharsWithoutBreak = 0;
break;
// When we see a non-space, increment the numCharsWithoutBreak.
default:
++numCharsWithoutBreak;
break;
}
}
}
// Flush the remaining chars at the end of the string.
resultArr[resultArrLen++] = str.substring(flushIndex);
return resultArr.join('');
},
/**
* String inserted as a word break by insertWordBreaks(). Safari requires
* <wbr></wbr>, Opera needs the 'shy' entity, though this will give a
* visible hyphen at breaks. Other browsers just use <wbr>.
* @type {string}
* @private
*/
WORD_BREAK: goog.userAgent.WEBKIT
? '<wbr></wbr>' : goog.userAgent.OPERA ? '­' : '<wbr>'
};
}
if (!goog.i18n) {
goog.i18n = {
bidi: {
/**
* Check the directionality of a piece of text, return true if the piece
* of text should be laid out in RTL direction.
* @param {string} text The piece of text that need to be detected.
* @param {boolean=} opt_isHtml Whether {@code text} is HTML/HTML-escaped.
* Default: false.
* @return {boolean}
* @private
*/
detectRtlDirectionality: function(text, opt_isHtml) {
text = soyshim.$$bidiStripHtmlIfNecessary_(text, opt_isHtml);
return soyshim.$$bidiRtlWordRatio_(text)
> soyshim.$$bidiRtlDetectionThreshold_;
}
}
};
}
/**
* Directionality enum.
* @enum {number}
*/
goog.i18n.bidi.Dir = {
RTL: -1,
UNKNOWN: 0,
LTR: 1
};
/**
* Convert a directionality given in various formats to a goog.i18n.bidi.Dir
* constant. Useful for interaction with different standards of directionality
* representation.
*
* @param {goog.i18n.bidi.Dir|number|boolean} givenDir Directionality given in
* one of the following formats:
* 1. A goog.i18n.bidi.Dir constant.
* 2. A number (positive = LRT, negative = RTL, 0 = unknown).
* 3. A boolean (true = RTL, false = LTR).
* @return {goog.i18n.bidi.Dir} A goog.i18n.bidi.Dir constant matching the given
* directionality.
*/
goog.i18n.bidi.toDir = function(givenDir) {
if (typeof givenDir == 'number') {
return givenDir > 0 ? goog.i18n.bidi.Dir.LTR :
givenDir < 0 ? goog.i18n.bidi.Dir.RTL : goog.i18n.bidi.Dir.UNKNOWN;
} else {
return givenDir ? goog.i18n.bidi.Dir.RTL : goog.i18n.bidi.Dir.LTR;
}
};
/**
* Utility class for formatting text for display in a potentially
* opposite-directionality context without garbling. Provides the following
* functionality:
*
* @param {goog.i18n.bidi.Dir|number|boolean} dir The context
* directionality as a number
* (positive = LRT, negative = RTL, 0 = unknown).
* @constructor
*/
goog.i18n.BidiFormatter = function(dir) {
this.dir_ = goog.i18n.bidi.toDir(dir);
};
/**
* Returns 'dir="ltr"' or 'dir="rtl"', depending on {@code text}'s estimated
* directionality, if it is not the same as the context directionality.
* Otherwise, returns the empty string.
*
* @param {string} text Text whose directionality is to be estimated.
* @param {boolean=} opt_isHtml Whether {@code text} is HTML / HTML-escaped.
* Default: false.
* @return {string} 'dir="rtl"' for RTL text in non-RTL context; 'dir="ltr"' for
* LTR text in non-LTR context; else, the empty string.
*/
goog.i18n.BidiFormatter.prototype.dirAttr = function (text, opt_isHtml) {
var dir = soy.$$bidiTextDir(text, opt_isHtml);
return dir && dir != this.dir_ ? dir < 0 ? 'dir="rtl"' : 'dir="ltr"' : '';
};
/**
* Returns the trailing horizontal edge, i.e. "right" or "left", depending on
* the global bidi directionality.
* @return {string} "left" for RTL context and "right" otherwise.
*/
goog.i18n.BidiFormatter.prototype.endEdge = function () {
return this.dir_ < 0 ? 'left' : 'right';
};
/**
* Returns the Unicode BiDi mark matching the context directionality (LRM for
* LTR context directionality, RLM for RTL context directionality), or the
* empty string for neutral / unknown context directionality.
*
* @return {string} LRM for LTR context directionality and RLM for RTL context
* directionality.
*/
goog.i18n.BidiFormatter.prototype.mark = function () {
return (
(this.dir_ > 0) ? '\u200E' /*LRM*/ :
(this.dir_ < 0) ? '\u200F' /*RLM*/ :
'');
};
/**
* Returns a Unicode BiDi mark matching the context directionality (LRM or RLM)
* if the directionality or the exit directionality of {@code text} are opposite
* to the context directionality. Otherwise returns the empty string.
*
* @param {string} text The input text.
* @param {boolean=} opt_isHtml Whether {@code text} is HTML / HTML-escaped.
* Default: false.
* @return {string} A Unicode bidi mark matching the global directionality or
* the empty string.
*/
goog.i18n.BidiFormatter.prototype.markAfter = function (text, opt_isHtml) {
var dir = soy.$$bidiTextDir(text, opt_isHtml);
return soyshim.$$bidiMarkAfterKnownDir_(this.dir_, dir, text, opt_isHtml);
};
/**
* Formats a string of unknown directionality for use in HTML output of the
* context directionality, so an opposite-directionality string is neither
* garbled nor garbles what follows it.
*
* @param {string} str The input text.
* @param {boolean=} placeholder This argument exists for consistency with the
* Closure Library. Specifying it has no effect.
* @return {string} Input text after applying the above processing.
*/
goog.i18n.BidiFormatter.prototype.spanWrap = function(str, placeholder) {
str = String(str);
var textDir = soy.$$bidiTextDir(str, true);
var reset = soyshim.$$bidiMarkAfterKnownDir_(this.dir_, textDir, str, true);
if (textDir > 0 && this.dir_ <= 0) {
str = '<span dir="ltr">' + str + '</span>';
} else if (textDir < 0 && this.dir_ >= 0) {
str = '<span dir="rtl">' + str + '</span>';
}
return str + reset;
};
/**
* Returns the leading horizontal edge, i.e. "left" or "right", depending on
* the global bidi directionality.
* @return {string} "right" for RTL context and "left" otherwise.
*/
goog.i18n.BidiFormatter.prototype.startEdge = function () {
return this.dir_ < 0 ? 'right' : 'left';
};
/**
* Formats a string of unknown directionality for use in plain-text output of
* the context directionality, so an opposite-directionality string is neither
* garbled nor garbles what follows it.
* As opposed to {@link #spanWrap}, this makes use of unicode BiDi formatting
* characters. In HTML, its *only* valid use is inside of elements that do not
* allow mark-up, e.g. an 'option' tag.
*
* @param {string} str The input text.
* @param {boolean=} placeholder This argument exists for consistency with the
* Closure Library. Specifying it has no effect.
* @return {string} Input text after applying the above processing.
*/
goog.i18n.BidiFormatter.prototype.unicodeWrap = function(str, placeholder) {
str = String(str);
var textDir = soy.$$bidiTextDir(str, true);
var reset = soyshim.$$bidiMarkAfterKnownDir_(this.dir_, textDir, str, true);
if (textDir > 0 && this.dir_ <= 0) {
str = '\u202A' + str + '\u202C';
} else if (textDir < 0 && this.dir_ >= 0) {
str = '\u202B' + str + '\u202C';
}
return str + reset;
};
if (!goog.string) {
goog.string = {
/**
* Converts \r\n, \r, and \n to <br>s
* @param {*} str The string in which to convert newlines.
* @param {boolean=} opt_xml Whether to use XML compatible tags.
* @return {string} A copy of {@code str} with converted newlines.
*/
newLineToBr: function(str, opt_xml) {
str = String(str);
// This quick test helps in the case when there are no chars to replace,
// in the worst case this makes barely a difference to the time taken.
if (!goog.string.NEWLINE_TO_BR_RE_.test(str)) {
return str;
}
return str.replace(/(\r\n|\r|\n)/g, opt_xml ? '<br />' : '<br>');
},
urlEncode: encodeURIComponent,
/**
* Regular expression used within newlineToBr().
* @type {RegExp}
* @private
*/
NEWLINE_TO_BR_RE_: /[\r\n]/
};
}
/**
* Utility class to facilitate much faster string concatenation in IE,
* using Array.join() rather than the '+' operator. For other browsers
* we simply use the '+' operator.
*
* @param {Object|number|string|boolean=} opt_a1 Optional first initial item
* to append.
* @param {...Object|number|string|boolean} var_args Other initial items to
* append, e.g., new goog.string.StringBuffer('foo', 'bar').
* @constructor
*/
goog.string.StringBuffer = function(opt_a1, var_args) {
/**
* Internal buffer for the string to be concatenated.
* @type {string|Array}
* @private
*/
this.buffer_ = goog.userAgent.jscript.HAS_JSCRIPT ? [] : '';
if (opt_a1 != null) {
this.append.apply(this, arguments);
}
};
/**
* Length of internal buffer (faster than calling buffer_.length).
* Only used for IE.
* @type {number}
* @private
*/
goog.string.StringBuffer.prototype.bufferLength_ = 0;
/**
* Appends one or more items to the string.
*
* Calling this with null, undefined, or empty arguments is an error.
*
* @param {Object|number|string|boolean} a1 Required first string.
* @param {Object|number|string|boolean=} opt_a2 Optional second string.
* @param {...Object|number|string|boolean} var_args Other items to append,
* e.g., sb.append('foo', 'bar', 'baz').
* @return {goog.string.StringBuffer} This same StringBuilder object.
*/
goog.string.StringBuffer.prototype.append = function(a1, opt_a2, var_args) {
if (goog.userAgent.jscript.HAS_JSCRIPT) {
if (opt_a2 == null) { // no second argument (note: undefined == null)
// Array assignment is 2x faster than Array push. Also, use a1
// directly to avoid arguments instantiation, another 2x improvement.
this.buffer_[this.bufferLength_++] = a1;
} else {
var arr = /**@type {Array.<number|string|boolean>}*/(this.buffer_);
arr.push.apply(arr, arguments);
this.bufferLength_ = this.buffer_.length;
}
} else {
// Use a1 directly to avoid arguments instantiation for single-arg case.
this.buffer_ += a1;
if (opt_a2 != null) { // no second argument (note: undefined == null)
for (var i = 1; i < arguments.length; i++) {
this.buffer_ += arguments[i];
}
}
}
return this;
};
/**
* Clears the string.
*/
goog.string.StringBuffer.prototype.clear = function() {
if (goog.userAgent.jscript.HAS_JSCRIPT) {
this.buffer_.length = 0; // reuse array to avoid creating new object
this.bufferLength_ = 0;
} else {
this.buffer_ = '';
}
};
/**
* Returns the concatenated string.
*
* @return {string} The concatenated string.
*/
goog.string.StringBuffer.prototype.toString = function() {
if (goog.userAgent.jscript.HAS_JSCRIPT) {
var str = this.buffer_.join('');
// Given a string with the entire contents, simplify the StringBuilder by
// setting its contents to only be this string, rather than many fragments.
this.clear();
if (str) {
this.append(str);
}
return str;
} else {
return /** @type {string} */ (this.buffer_);
}
};
if (!goog.soy) goog.soy = {
/**
* Helper function to render a Soy template and then set the
* output string as the innerHTML of an element. It is recommended
* to use this helper function instead of directly setting
* innerHTML in your hand-written code, so that it will be easier
* to audit the code for cross-site scripting vulnerabilities.
*
* @param {Function} template The Soy template defining element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {Object=} opt_injectedData The injected data for the template.
* @param {(goog.dom.DomHelper|Document)=} opt_dom The context in which DOM
* nodes will be created.
*/
renderAsElement: function(
template, opt_templateData, opt_injectedData, opt_dom) {
return /** @type {!Element} */ (soyshim.$$renderWithWrapper_(
template, opt_templateData, opt_dom, true /* asElement */,
opt_injectedData));
},
/**
* Helper function to render a Soy template into a single node or
* a document fragment. If the rendered HTML string represents a
* single node, then that node is returned (note that this is
* *not* a fragment, despite them name of the method). Otherwise a
* document fragment is returned containing the rendered nodes.
*
* @param {Function} template The Soy template defining element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {Object=} opt_injectedData The injected data for the template.
* @param {(goog.dom.DomHelper|Document)=} opt_dom The context in which DOM
* nodes will be created.
* @return {!Node} The resulting node or document fragment.
*/
renderAsFragment: function(
template, opt_templateData, opt_injectedData, opt_dom) {
return soyshim.$$renderWithWrapper_(
template, opt_templateData, opt_dom, false /* asElement */,
opt_injectedData);
},
/**
* Helper function to render a Soy template and then set the output string as
* the innerHTML of an element. It is recommended to use this helper function
* instead of directly setting innerHTML in your hand-written code, so that it
* will be easier to audit the code for cross-site scripting vulnerabilities.
*
* NOTE: New code should consider using goog.soy.renderElement instead.
*
* @param {Element} element The element whose content we are rendering.
* @param {Function} template The Soy template defining the element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {Object=} opt_injectedData The injected data for the template.
*/
renderElement: function(
element, template, opt_templateData, opt_injectedData) {
element.innerHTML = template(opt_templateData, null, opt_injectedData);
},
data: {}
};
/**
* A type of textual content.
*
* This is an enum of type Object so that these values are unforgeable.
*
* @enum {!Object}
*/
goog.soy.data.SanitizedContentKind = {
/**
* A snippet of HTML that does not start or end inside a tag, comment, entity,
* or DOCTYPE; and that does not contain any executable code
* (JS, {@code <object>}s, etc.) from a different trust domain.
*/
HTML: {},
/**
* Executable Javascript code or expression, safe for insertion in a
* script-tag or event handler context, known to be free of any
* attacker-controlled scripts. This can either be side-effect-free
* Javascript (such as JSON) or Javascript that entirely under Google's
* control.
*/
JS: goog.DEBUG ? {sanitizedContentJsStrChars: true} : {},
/**
* A sequence of code units that can appear between quotes (either kind) in a
* JS program without causing a parse error, and without causing any side
* effects.
* <p>
* The content should not contain unescaped quotes, newlines, or anything else
* that would cause parsing to fail or to cause a JS parser to finish the
* string its parsing inside the content.
* <p>
* The content must also not end inside an escape sequence ; no partial octal
* escape sequences or odd number of '{@code \}'s at the end.
*/
JS_STR_CHARS: {},
/** A properly encoded portion of a URI. */
URI: {},
/**
* Repeated attribute names and values. For example,
* {@code dir="ltr" foo="bar" onclick="trustedFunction()" checked}.
*/
ATTRIBUTES: goog.DEBUG ? {sanitizedContentHtmlAttribute: true} : {},
// TODO: Consider separating rules, declarations, and values into
// separate types, but for simplicity, we'll treat explicitly blessed
// SanitizedContent as allowed in all of these contexts.
/**
* A CSS3 declaration, property, value or group of semicolon separated
* declarations.
*/
CSS: {},
/**
* Unsanitized plain-text content.
*
* This is effectively the "null" entry of this enum, and is sometimes used
* to explicitly mark content that should never be used unescaped. Since any
* string is safe to use as text, being of ContentKind.TEXT makes no
* guarantees about its safety in any other context such as HTML.
*/
TEXT: {}
};
/**
* A string-like object that carries a content-type.
*
* IMPORTANT! Do not create these directly, nor instantiate the subclasses.
* Instead, use a trusted, centrally reviewed library as endorsed by your team
* to generate these objects. Otherwise, you risk accidentally creating
* SanitizedContent that is attacker-controlled and gets evaluated unescaped in
* templates.
*
* @constructor
*/
goog.soy.data.SanitizedContent = function() {
throw Error('Do not instantiate directly');
};
/**
* The context in which this content is safe from XSS attacks.
* @type {goog.soy.data.SanitizedContentKind}
*/
goog.soy.data.SanitizedContent.prototype.contentKind;
/**
* The already-safe content.
* @type {string}
*/
goog.soy.data.SanitizedContent.prototype.content;
/** @override */
goog.soy.data.SanitizedContent.prototype.toString = function() {
return this.content;
};
var soy = { esc: {} };
var soydata = {};
soydata.VERY_UNSAFE = {};
var soyshim = { $$DEFAULT_TEMPLATE_DATA_: {} };
/**
* Helper function to render a Soy template into a single node or a document
* fragment. If the rendered HTML string represents a single node, then that
* node is returned. Otherwise a document fragment is created and returned
* (wrapped in a DIV element if #opt_singleNode is true).
*
* @param {Function} template The Soy template defining the element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {(goog.dom.DomHelper|Document)=} opt_dom The context in which DOM
* nodes will be created.
* @param {boolean=} opt_asElement Whether to wrap the fragment in an
* element if the template does not render a single element. If true,
* result is always an Element.
* @param {Object=} opt_injectedData The injected data for the template.
* @return {!Node} The resulting node or document fragment.
* @private
*/
soyshim.$$renderWithWrapper_ = function(
template, opt_templateData, opt_dom, opt_asElement, opt_injectedData) {
var dom = opt_dom || document;
var wrapper = dom.createElement('div');
wrapper.innerHTML = template(
opt_templateData || soyshim.$$DEFAULT_TEMPLATE_DATA_, undefined,
opt_injectedData);
// If the template renders as a single element, return it.
if (wrapper.childNodes.length == 1) {
var firstChild = wrapper.firstChild;
if (!opt_asElement || firstChild.nodeType == 1 /* Element */) {
return /** @type {!Node} */ (firstChild);
}
}
// If we're forcing it to be a single element, return the wrapper DIV.
if (opt_asElement) {
return wrapper;
}
// Otherwise, create and return a fragment.
var fragment = dom.createDocumentFragment();
while (wrapper.firstChild) {
fragment.appendChild(wrapper.firstChild);
}
return fragment;
};
/**
* Returns a Unicode BiDi mark matching bidiGlobalDir (LRM or RLM) if the
* directionality or the exit directionality of text are opposite to
* bidiGlobalDir. Otherwise returns the empty string.
* If opt_isHtml, makes sure to ignore the LTR nature of the mark-up and escapes
* in text, making the logic suitable for HTML and HTML-escaped text.
* @param {number} bidiGlobalDir The global directionality context: 1 if ltr, -1
* if rtl, 0 if unknown.
* @param {number} dir text's directionality: 1 if ltr, -1 if rtl, 0 if unknown.
* @param {string} text The text whose directionality is to be estimated.
* @param {boolean=} opt_isHtml Whether text is HTML/HTML-escaped.
* Default: false.
* @return {string} A Unicode bidi mark matching bidiGlobalDir, or
* the empty string when text's overall and exit directionalities both match
* bidiGlobalDir, or bidiGlobalDir is 0 (unknown).
* @private
*/
soyshim.$$bidiMarkAfterKnownDir_ = function(
bidiGlobalDir, dir, text, opt_isHtml) {
return (
bidiGlobalDir > 0 && (dir < 0 ||
soyshim.$$bidiIsRtlExitText_(text, opt_isHtml)) ? '\u200E' : // LRM
bidiGlobalDir < 0 && (dir > 0 ||
soyshim.$$bidiIsLtrExitText_(text, opt_isHtml)) ? '\u200F' : // RLM
'');
};
/**
* Strips str of any HTML mark-up and escapes. Imprecise in several ways, but
* precision is not very important, since the result is only meant to be used
* for directionality detection.
* @param {string} str The string to be stripped.
* @param {boolean=} opt_isHtml Whether str is HTML / HTML-escaped.
* Default: false.
* @return {string} The stripped string.
* @private
*/
soyshim.$$bidiStripHtmlIfNecessary_ = function(str, opt_isHtml) {
return opt_isHtml ? str.replace(soyshim.$$BIDI_HTML_SKIP_RE_, ' ') : str;
};
/**
* Simplified regular expression for am HTML tag (opening or closing) or an HTML
* escape - the things we want to skip over in order to ignore their ltr
* characters.
* @type {RegExp}
* @private
*/
soyshim.$$BIDI_HTML_SKIP_RE_ = /<[^>]*>|&[^;]+;/g;
/**
* A practical pattern to identify strong LTR character. This pattern is not
* theoretically correct according to unicode standard. It is simplified for
* performance and small code size.
* @type {string}
* @private
*/
soyshim.$$bidiLtrChars_ =
'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF' +
'\u2C00-\uFB1C\uFDFE-\uFE6F\uFEFD-\uFFFF';
/**
* A practical pattern to identify strong neutral and weak character. This
* pattern is not theoretically correct according to unicode standard. It is
* simplified for performance and small code size.
* @type {string}
* @private
*/
soyshim.$$bidiNeutralChars_ =
'\u0000-\u0020!-@[-`{-\u00BF\u00D7\u00F7\u02B9-\u02FF\u2000-\u2BFF';
/**
* A practical pattern to identify strong RTL character. This pattern is not
* theoretically correct according to unicode standard. It is simplified for
* performance and small code size.
* @type {string}
* @private
*/
soyshim.$$bidiRtlChars_ = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC';
/**
* Regular expressions to check if a piece of text is of RTL directionality
* on first character with strong directionality.
* @type {RegExp}
* @private
*/
soyshim.$$bidiRtlDirCheckRe_ = new RegExp(
'^[^' + soyshim.$$bidiLtrChars_ + ']*[' + soyshim.$$bidiRtlChars_ + ']');
/**
* Regular expressions to check if a piece of text is of neutral directionality.
* Url are considered as neutral.
* @type {RegExp}
* @private
*/
soyshim.$$bidiNeutralDirCheckRe_ = new RegExp(
'^[' + soyshim.$$bidiNeutralChars_ + ']*$|^http://');
/**
* Check the directionality of the a piece of text based on the first character
* with strong directionality.
* @param {string} str string being checked.
* @return {boolean} return true if rtl directionality is being detected.
* @private
*/
soyshim.$$bidiIsRtlText_ = function(str) {
return soyshim.$$bidiRtlDirCheckRe_.test(str);
};
/**
* Check the directionality of the a piece of text based on the first character
* with strong directionality.
* @param {string} str string being checked.
* @return {boolean} true if all characters have neutral directionality.
* @private
*/
soyshim.$$bidiIsNeutralText_ = function(str) {
return soyshim.$$bidiNeutralDirCheckRe_.test(str);
};
/**
* This constant controls threshold of rtl directionality.
* @type {number}
* @private
*/
soyshim.$$bidiRtlDetectionThreshold_ = 0.40;
/**
* Returns the RTL ratio based on word count.
* @param {string} str the string that need to be checked.
* @return {number} the ratio of RTL words among all words with directionality.
* @private
*/
soyshim.$$bidiRtlWordRatio_ = function(str) {
var rtlCount = 0;
var totalCount = 0;
var tokens = str.split(' ');
for (var i = 0; i < tokens.length; i++) {
if (soyshim.$$bidiIsRtlText_(tokens[i])) {
rtlCount++;
totalCount++;
} else if (!soyshim.$$bidiIsNeutralText_(tokens[i])) {
totalCount++;
}
}
return totalCount == 0 ? 0 : rtlCount / totalCount;
};
/**
* Regular expressions to check if the last strongly-directional character in a
* piece of text is LTR.
* @type {RegExp}
* @private
*/
soyshim.$$bidiLtrExitDirCheckRe_ = new RegExp(
'[' + soyshim.$$bidiLtrChars_ + '][^' + soyshim.$$bidiRtlChars_ + ']*$');
/**
* Regular expressions to check if the last strongly-directional character in a
* piece of text is RTL.
* @type {RegExp}
* @private
*/
soyshim.$$bidiRtlExitDirCheckRe_ = new RegExp(
'[' + soyshim.$$bidiRtlChars_ + '][^' + soyshim.$$bidiLtrChars_ + ']*$');
/**
* Check if the exit directionality a piece of text is LTR, i.e. if the last
* strongly-directional character in the string is LTR.
* @param {string} str string being checked.
* @param {boolean=} opt_isHtml Whether str is HTML / HTML-escaped.
* Default: false.
* @return {boolean} Whether LTR exit directionality was detected.
* @private
*/
soyshim.$$bidiIsLtrExitText_ = function(str, opt_isHtml) {
str = soyshim.$$bidiStripHtmlIfNecessary_(str, opt_isHtml);
return soyshim.$$bidiLtrExitDirCheckRe_.test(str);
};
/**
* Check if the exit directionality a piece of text is RTL, i.e. if the last
* strongly-directional character in the string is RTL.
* @param {string} str string being checked.
* @param {boolean=} opt_isHtml Whether str is HTML / HTML-escaped.
* Default: false.
* @return {boolean} Whether RTL exit directionality was detected.
* @private
*/
soyshim.$$bidiIsRtlExitText_ = function(str, opt_isHtml) {
str = soyshim.$$bidiStripHtmlIfNecessary_(str, opt_isHtml);
return soyshim.$$bidiRtlExitDirCheckRe_.test(str);
};
// =============================================================================
// COPIED FROM soyutils_usegoog.js
// -----------------------------------------------------------------------------
// StringBuilder (compatible with the 'stringbuilder' code style).
/**
* Utility class to facilitate much faster string concatenation in IE,
* using Array.join() rather than the '+' operator. For other browsers
* we simply use the '+' operator.
*
* @param {Object} var_args Initial items to append,
* e.g., new soy.StringBuilder('foo', 'bar').
* @constructor
*/
soy.StringBuilder = goog.string.StringBuffer;
// -----------------------------------------------------------------------------
// soydata: Defines typed strings, e.g. an HTML string {@code "a<b>c"} is
// semantically distinct from the plain text string {@code "a<b>c"} and smart
// templates can take that distinction into account.
/**
* A type of textual content.
*
* This is an enum of type Object so that these values are unforgeable.
*
* @enum {!Object}
*/
soydata.SanitizedContentKind = goog.soy.data.SanitizedContentKind;
/**
* Content of type {@link soydata.SanitizedContentKind.HTML}.
*
* The content is a string of HTML that can safely be embedded in a PCDATA
* context in your app. If you would be surprised to find that an HTML
* sanitizer produced {@code s} (e.g. it runs code or fetches bad URLs) and
* you wouldn't write a template that produces {@code s} on security or privacy
* grounds, then don't pass {@code s} here.
*
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.SanitizedHtml = function() {
goog.soy.data.SanitizedContent.call(this); // Throws an exception.
};
goog.inherits(soydata.SanitizedHtml, goog.soy.data.SanitizedContent);
/** @override */
soydata.SanitizedHtml.prototype.contentKind = soydata.SanitizedContentKind.HTML;
/**
* Content of type {@link soydata.SanitizedContentKind.JS}.
*
* The content is Javascript source that when evaluated does not execute any
* attacker-controlled scripts.
*
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.SanitizedJs = function() {
goog.soy.data.SanitizedContent.call(this); // Throws an exception.
};
goog.inherits(soydata.SanitizedJs, goog.soy.data.SanitizedContent);
/** @override */
soydata.SanitizedJs.prototype.contentKind =
soydata.SanitizedContentKind.JS;
/**
* Content of type {@link soydata.SanitizedContentKind.JS_STR_CHARS}.
*
* The content can be safely inserted as part of a single- or double-quoted
* string without terminating the string.
*
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.SanitizedJsStrChars = function() {
goog.soy.data.SanitizedContent.call(this); // Throws an exception.
};
goog.inherits(soydata.SanitizedJsStrChars, goog.soy.data.SanitizedContent);
/** @override */
soydata.SanitizedJsStrChars.prototype.contentKind =
soydata.SanitizedContentKind.JS_STR_CHARS;
/**
* Content of type {@link soydata.SanitizedContentKind.URI}.
*
* The content is a URI chunk that the caller knows is safe to emit in a
* template.
*
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.SanitizedUri = function() {
goog.soy.data.SanitizedContent.call(this); // Throws an exception.
};
goog.inherits(soydata.SanitizedUri, goog.soy.data.SanitizedContent);
/** @override */
soydata.SanitizedUri.prototype.contentKind = soydata.SanitizedContentKind.URI;
/**
* Content of type {@link soydata.SanitizedContentKind.ATTRIBUTES}.
*
* The content should be safely embeddable within an open tag, such as a
* key="value" pair.
*
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.SanitizedHtmlAttribute = function() {
goog.soy.data.SanitizedContent.call(this); // Throws an exception.
};
goog.inherits(soydata.SanitizedHtmlAttribute, goog.soy.data.SanitizedContent);
/** @override */
soydata.SanitizedHtmlAttribute.prototype.contentKind =
soydata.SanitizedContentKind.ATTRIBUTES;
/**
* Content of type {@link soydata.SanitizedContentKind.CSS}.
*
* The content is non-attacker-exploitable CSS, such as {@code color:#c3d9ff}.
*
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.SanitizedCss = function() {
goog.soy.data.SanitizedContent.call(this); // Throws an exception.
};
goog.inherits(soydata.SanitizedCss, goog.soy.data.SanitizedContent);
/** @override */
soydata.SanitizedCss.prototype.contentKind =
soydata.SanitizedContentKind.CSS;
/**
* Unsanitized plain text string.
*
* While all strings are effectively safe to use as a plain text, there are no
* guarantees about safety in any other context such as HTML. This is
* sometimes used to mark that should never be used unescaped.
*
* @param {*} content Plain text with no guarantees.
* @constructor
* @extends {goog.soy.data.SanitizedContent}
*/
soydata.UnsanitizedText = function(content) {
/** @override */
this.content = String(content);
};
goog.inherits(soydata.UnsanitizedText, goog.soy.data.SanitizedContent);
/** @override */
soydata.UnsanitizedText.prototype.contentKind =
soydata.SanitizedContentKind.TEXT;
/**
* Creates a factory for SanitizedContent types.
*
* This is a hack so that the soydata.VERY_UNSAFE.ordainSanitized* can
* instantiate Sanitized* classes, without making the Sanitized* constructors
* publicly usable. Requiring all construction to use the VERY_UNSAFE names
* helps callers and their reviewers easily tell that creating SanitizedContent
* is not always safe and calls for careful review.
*
* @param {function(new: T, string)} ctor A constructor.
* @return {!function(*): T} A factory that takes content and returns a
* new instance.
* @template T
* @private
*/
soydata.$$makeSanitizedContentFactory_ = function(ctor) {
/** @constructor */
function InstantiableCtor() {}
InstantiableCtor.prototype = ctor.prototype;
return function(content) {
var result = new InstantiableCtor();
result.content = String(content);
return result;
};
};
// -----------------------------------------------------------------------------
// Sanitized content ordainers. Please use these with extreme caution (with the
// exception of markUnsanitizedText). A good recommendation is to limit usage
// of these to just a handful of files in your source tree where usages can be
// carefully audited.
/**
* Protects a string from being used in an noAutoescaped context.
*
* This is useful for content where there is significant risk of accidental
* unescaped usage in a Soy template. A great case is for user-controlled
* data that has historically been a source of vulernabilities.
*
* @param {*} content Text to protect.
* @return {!soydata.UnsanitizedText} A wrapper that is rejected by the
* Soy noAutoescape print directive.
*/
soydata.markUnsanitizedText = function(content) {
return new soydata.UnsanitizedText(content);
};
/**
* Takes a leap of faith that the provided content is "safe" HTML.
*
* @param {*} content A string of HTML that can safely be embedded in
* a PCDATA context in your app. If you would be surprised to find that an
* HTML sanitizer produced {@code s} (e.g. it runs code or fetches bad URLs)
* and you wouldn't write a template that produces {@code s} on security or
* privacy grounds, then don't pass {@code s} here.
* @return {!soydata.SanitizedHtml} Sanitized content wrapper that
* indicates to Soy not to escape when printed as HTML.
*/
soydata.VERY_UNSAFE.ordainSanitizedHtml =
soydata.$$makeSanitizedContentFactory_(soydata.SanitizedHtml);
/**
* Takes a leap of faith that the provided content is "safe" (non-attacker-
* controlled, XSS-free) Javascript.
*
* @param {*} content Javascript source that when evaluated does not
* execute any attacker-controlled scripts.
* @return {!soydata.SanitizedJs} Sanitized content wrapper that indicates to
* Soy not to escape when printed as Javascript source.
*/
soydata.VERY_UNSAFE.ordainSanitizedJs =
soydata.$$makeSanitizedContentFactory_(soydata.SanitizedJs);
// TODO: This function is probably necessary, either externally or internally
// as an implementation detail. Generally, plain text will always work here,
// as there's no harm to unescaping the string and then re-escaping when
// finally printed.
/**
* Takes a leap of faith that the provided content can be safely embedded in
* a Javascript string without re-esacping.
*
* @param {*} content Content that can be safely inserted as part of a
* single- or double-quoted string without terminating the string.
* @return {!soydata.SanitizedJsStrChars} Sanitized content wrapper that
* indicates to Soy not to escape when printed in a JS string.
*/
soydata.VERY_UNSAFE.ordainSanitizedJsStrChars =
soydata.$$makeSanitizedContentFactory_(soydata.SanitizedJsStrChars);
/**
* Takes a leap of faith that the provided content is "safe" to use as a URI
* in a Soy template.
*
* This creates a Soy SanitizedContent object which indicates to Soy there is
* no need to escape it when printed as a URI (e.g. in an href or src
* attribute), such as if it's already been encoded or if it's a Javascript:
* URI.
*
* @param {*} content A chunk of URI that the caller knows is safe to
* emit in a template.
* @return {!soydata.SanitizedUri} Sanitized content wrapper that indicates to
* Soy not to escape or filter when printed in URI context.
*/
soydata.VERY_UNSAFE.ordainSanitizedUri =
soydata.$$makeSanitizedContentFactory_(soydata.SanitizedUri);
/**
* Takes a leap of faith that the provided content is "safe" to use as an
* HTML attribute.
*
* @param {*} content An attribute name and value, such as
* {@code dir="ltr"}.
* @return {!soydata.SanitizedHtmlAttribute} Sanitized content wrapper that
* indicates to Soy not to escape when printed as an HTML attribute.
*/
soydata.VERY_UNSAFE.ordainSanitizedHtmlAttribute =
soydata.$$makeSanitizedContentFactory_(soydata.SanitizedHtmlAttribute);
/**
* Takes a leap of faith that the provided content is "safe" to use as CSS
* in a style attribute or block.
*
* @param {*} content CSS, such as {@code color:#c3d9ff}.
* @return {!soydata.SanitizedCss} Sanitized CSS wrapper that indicates to
* Soy there is no need to escape or filter when printed in CSS context.
*/
soydata.VERY_UNSAFE.ordainSanitizedCss =
soydata.$$makeSanitizedContentFactory_(soydata.SanitizedCss);
// -----------------------------------------------------------------------------
// Public utilities.
/**
* Helper function to render a Soy template and then set the output string as
* the innerHTML of an element. It is recommended to use this helper function
* instead of directly setting innerHTML in your hand-written code, so that it
* will be easier to audit the code for cross-site scripting vulnerabilities.
*
* NOTE: New code should consider using goog.soy.renderElement instead.
*
* @param {Element} element The element whose content we are rendering.
* @param {Function} template The Soy template defining the element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {Object=} opt_injectedData The injected data for the template.
*/
soy.renderElement = goog.soy.renderElement;
/**
* Helper function to render a Soy template into a single node or a document
* fragment. If the rendered HTML string represents a single node, then that
* node is returned (note that this is *not* a fragment, despite them name of
* the method). Otherwise a document fragment is returned containing the
* rendered nodes.
*
* NOTE: New code should consider using goog.soy.renderAsFragment
* instead (note that the arguments are different).
*
* @param {Function} template The Soy template defining the element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {Document=} opt_document The document used to create DOM nodes. If not
* specified, global document object is used.
* @param {Object=} opt_injectedData The injected data for the template.
* @return {!Node} The resulting node or document fragment.
*/
soy.renderAsFragment = function(
template, opt_templateData, opt_document, opt_injectedData) {
return goog.soy.renderAsFragment(
template, opt_templateData, opt_injectedData,
new goog.dom.DomHelper(opt_document));
};
/**
* Helper function to render a Soy template into a single node. If the rendered
* HTML string represents a single node, then that node is returned. Otherwise,
* a DIV element is returned containing the rendered nodes.
*
* NOTE: New code should consider using goog.soy.renderAsElement
* instead (note that the arguments are different).
*
* @param {Function} template The Soy template defining the element's content.
* @param {Object=} opt_templateData The data for the template.
* @param {Document=} opt_document The document used to create DOM nodes. If not
* specified, global document object is used.
* @param {Object=} opt_injectedData The injected data for the template.
* @return {!Element} Rendered template contents, wrapped in a parent DIV
* element if necessary.
*/
soy.renderAsElement = function(
template, opt_templateData, opt_document, opt_injectedData) {
return goog.soy.renderAsElement(
template, opt_templateData, opt_injectedData,
new goog.dom.DomHelper(opt_document));
};
// -----------------------------------------------------------------------------
// Below are private utilities to be used by Soy-generated code only.
/**
* Builds an augmented map. The returned map will contain mappings from both
* the base map and the additional map. If the same key appears in both, then
* the value from the additional map will be visible, while the value from the
* base map will be hidden. The base map will be used, but not modified.
*
* @param {!Object} baseMap The original map to augment.
* @param {!Object} additionalMap A map containing the additional mappings.
* @return {!Object} An augmented map containing both the original and
* additional mappings.
*/
soy.$$augmentMap = function(baseMap, additionalMap) {
// Create a new map whose '__proto__' field is set to baseMap.
/** @constructor */
function TempCtor() {}
TempCtor.prototype = baseMap;
var augmentedMap = new TempCtor();
// Add the additional mappings to the new map.
for (var key in additionalMap) {
augmentedMap[key] = additionalMap[key];
}
return augmentedMap;
};
/**
* Checks that the given map key is a string.
* @param {*} key Key to check.
* @return {string} The given key.
*/
soy.$$checkMapKey = function(key) {
if ((typeof key) != 'string') {
throw Error(
'Map literal\'s key expression must evaluate to string' +
' (encountered type "' + (typeof key) + '").');
}
return key;
};
/**
* Gets the keys in a map as an array. There are no guarantees on the order.
* @param {Object} map The map to get the keys of.
* @return {Array.<string>} The array of keys in the given map.
*/
soy.$$getMapKeys = function(map) {
var mapKeys = [];
for (var key in map) {
mapKeys.push(key);
}
return mapKeys;
};
/**
* Gets a consistent unique id for the given delegate template name. Two calls
* to this function will return the same id if and only if the input names are
* the same.
*
* <p> Important: This function must always be called with a string constant.
*
* <p> If Closure Compiler is not being used, then this is just this identity
* function. If Closure Compiler is being used, then each call to this function
* will be replaced with a short string constant, which will be consistent per
* input name.
*
* @param {string} delTemplateName The delegate template name for which to get a
* consistent unique id.
* @return {string} A unique id that is consistent per input name.
*
* @consistentIdGenerator
*/
soy.$$getDelTemplateId = function(delTemplateName) {
return delTemplateName;
};
/**
* Map from registered delegate template key to the priority of the
* implementation.
* @type {Object}
* @private
*/
soy.$$DELEGATE_REGISTRY_PRIORITIES_ = {};
/**
* Map from registered delegate template key to the implementation function.
* @type {Object}
* @private
*/
soy.$$DELEGATE_REGISTRY_FUNCTIONS_ = {};
/**
* Registers a delegate implementation. If the same delegate template key (id
* and variant) has been registered previously, then priority values are
* compared and only the higher priority implementation is stored (if
* priorities are equal, an error is thrown).
*
* @param {string} delTemplateId The delegate template id.
* @param {string} delTemplateVariant The delegate template variant (can be
* empty string).
* @param {number} delPriority The implementation's priority value.
* @param {Function} delFn The implementation function.
*/
soy.$$registerDelegateFn = function(
delTemplateId, delTemplateVariant, delPriority, delFn) {
var mapKey = 'key_' + delTemplateId + ':' + delTemplateVariant;
var currPriority = soy.$$DELEGATE_REGISTRY_PRIORITIES_[mapKey];
if (currPriority === undefined || delPriority > currPriority) {
// Registering new or higher-priority function: replace registry entry.
soy.$$DELEGATE_REGISTRY_PRIORITIES_[mapKey] = delPriority;
soy.$$DELEGATE_REGISTRY_FUNCTIONS_[mapKey] = delFn;
} else if (delPriority == currPriority) {
// Registering same-priority function: error.
throw Error(
'Encountered two active delegates with the same priority ("' +
delTemplateId + ':' + delTemplateVariant + '").');
} else {
// Registering lower-priority function: do nothing.
}
};
/**
* Retrieves the (highest-priority) implementation that has been registered for
* a given delegate