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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview
* 'I18nBehavior' is a behavior to mix in loading of internationalization
* strings.
*/
/** @polymerBehavior */
var I18nBehavior = {
properties: {
/**
* The language the UI is presented in. Used to signal dynamic language
* change.
*/
locale: {
type: String,
value: '',
},
},
/**
* Returns a translated string where $1 to $9 are replaced by the given
* values.
* @param {string} id The ID of the string to translate.
* @param {...string} var_args Values to replace the placeholders $1 to $9
* in the string.
* @return {string} A translated, substituted string.
* @private
*/
i18nRaw_: function(id, var_args) {
return arguments.length == 1 ?
loadTimeData.getString(id) :
loadTimeData.getStringF.apply(loadTimeData, arguments);
},
/**
* Returns a translated string where $1 to $9 are replaced by the given
* values. Also sanitizes the output to filter out dangerous HTML/JS.
* Use with Polymer bindings that are *not* inner-h-t-m-l.
* @param {string} id The ID of the string to translate.
* @param {...string} var_args Values to replace the placeholders $1 to $9
* in the string.
* @return {string} A translated, sanitized, substituted string.
*/
i18n: function(id, var_args) {
var rawString = this.i18nRaw_.apply(this, arguments);
return parseHtmlSubset('<b>' + rawString + '</b>').firstChild.textContent;
},
/**
* Similar to 'i18n', returns a translated, sanitized, substituted string.
* It receives the string ID and a dictionary containing the substitutions
* as well as optional additional allowed tags and attributes. Use with
* Polymer bindings that are inner-h-t-m-l, for example.
* @param {string} id The ID of the string to translate.
* @param {SanitizeInnerHtmlOpts=} opts
* @return {string}
*/
i18nAdvanced: function(id, opts) {
opts = opts || {};
var args = [id].concat(opts.substitutions || []);
var rawString = this.i18nRaw_.apply(this, args);
return loadTimeData.sanitizeInnerHtml(rawString, opts);
},
/**
* Similar to 'i18n', with an unused |locale| parameter used to trigger
* updates when |this.locale| changes.
* @param {string} locale The UI language used.
* @param {string} id The ID of the string to translate.
* @param {...string} var_args Values to replace the placeholders $1 to $9
* in the string.
* @return {string} A translated, sanitized, substituted string.
*/
i18nDynamic: function(locale, id, var_args) {
return this.i18n.apply(this, Array.prototype.slice.call(arguments, 1));
},
/**
* Similar to 'i18nDynamic', but var_args valus are interpreted as keys in
* loadTimeData. This allows generation of strings that take other localized
* strings as parameters.
* @param {string} locale The UI language used.
* @param {string} id The ID of the string to translate.
* @param {...string} var_args Values to replace the placeholders $1 to $9
* in the string. Values are interpreted as strings IDs if found in the
* list of localized strings.
* @return {string} A translated, sanitized, substituted string.
*/
i18nRecursive: function(locale, id, var_args) {
var args = Array.prototype.slice.call(arguments, 2);
if (args.length > 0) {
// Try to replace IDs with localized values.
var self = this;
args = args.map(function(str) {
return self.i18nExists(str) ? loadTimeData.getString(str) : str;
});
}
return this.i18nDynamic.apply(this, [locale, id].concat(args));
},
/**
* Returns true if a translation exists for |id|.
* @param {string} id
* @return {boolean}
*/
i18nExists: function(id) {
return loadTimeData.valueExists(id);
},
/**
* Call this when UI strings may have changed. This will send an update to
* any data bindings to i18nDynamic(locale, ...).
* @suppress {checkTypes}
*/
i18nUpdateLocale: function() {
// Force reload.
this.locale = undefined;
this.locale = loadTimeData.getString('language');
},
};
/**
* TODO(stevenjb): Replace with an interface. b/24294625
* @typedef {{
* i18n: function(string, ...string): string,
* i18nAdvanced: function(string, SanitizeInnerHtmlOpts=): string,
* i18nDynamic: function(string, string, ...string): string,
* i18nExists: function(string),
* i18nUpdateLocale: function()
* }}
*/
I18nBehavior.Proto;
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