angular-gettext.js

angular.module('gettext', []);

angular.module('gettext').constant('gettext', function (str) {
    /*
     * Does nothing, simply returns the input string.
     *
     * This function serves as a marker for `grunt-angular-gettext` to know that
     * this string should be extracted for translations.
     */
    return str;
});

angular.module('gettext').factory('gettextCatalog', ["gettextPlurals", "$http", "$cacheFactory", "$interpolate", "$rootScope", function (gettextPlurals, $http, $cacheFactory, $interpolate, $rootScope) {
    var catalog;
    var noContext = '$$noContext';

    // IE8 returns UPPER CASE tags, even though the source is lower case.
    // This can causes the (key) string in the DOM to have a different case to
    // the string in the `po` files.
    // IE9, IE10 and IE11 reorders the attributes of tags.
    var test = '<span id="test" title="test" class="tested">test</span>';
    var isHTMLModified = (angular.element('<span>' + test + '</span>').html() !== test);

    var prefixDebug = function (string) {
        if (catalog.debug && catalog.currentLanguage !== catalog.baseLanguage) {
            return catalog.debugPrefix + string;
        } else {
            return string;
        }
    };

    var addTranslatedMarkers = function (string) {
        if (catalog.showTranslatedMarkers) {
            return catalog.translatedMarkerPrefix + string + catalog.translatedMarkerSuffix;
        } else {
            return string;
        }
    };

    function broadcastUpdated() {
        $rootScope.$broadcast('gettextLanguageChanged');
    }

    function getInternalNamespaceName(namepsace) {
        return namepsace ? ('$$_ns_' + namepsace) : namepsace;
    }

    catalog = {
        debug: false,
        debugPrefix: '[MISSING]: ',
        showTranslatedMarkers: false,
        translatedMarkerPrefix: '[',
        translatedMarkerSuffix: ']',
        strings: {},
        baseLanguage: 'en',
        currentLanguage: 'en',
        cache: $cacheFactory('strings'),

        setCurrentLanguage: function (lang) {
            this.currentLanguage = lang;
            broadcastUpdated();
        },

        getCurrentLanguage: function () {
            return this.currentLanguage;
        },

        setStrings: function (language, strings, namepsace) {
            if (!this.strings[language]) {
                this.strings[language] = {};
            }

            namepsace = getInternalNamespaceName(namepsace);

            if (namepsace && !this.strings[language][namepsace]) {
                this.strings[language][namepsace] = {};
            }

            for (var key in strings) {
                var val = strings[key];

                if (isHTMLModified) {
                    // Use the DOM engine to render any HTML in the key (#131).
                    key = angular.element('<span>' + key + '</span>').html();
                }

                if (angular.isString(val) || angular.isArray(val)) {
                    // No context, wrap it in $$noContext.
                    var obj = {};
                    obj[noContext] = val;
                    val = obj;
                }

                // Expand single strings for each context.
                for (var context in val) {
                    var str = val[context];
                    val[context] = angular.isArray(str) ? str : [str];
                }

                if (namepsace) {
                    this.strings[language][namepsace][key] = val;
                } else {
                    this.strings[language][key] = val;
                }
            }

            broadcastUpdated();
        },

        getStringForm: function (string, n, context, namepsace) {
            var stringTable = this.strings[this.currentLanguage] || {};
            namepsace = getInternalNamespaceName(namepsace);
            if (namepsace) {
                stringTable = stringTable[namepsace] || {};
            }
            var contexts = stringTable[string] || {};
            var plurals = contexts[context || noContext] || [];
            return plurals[n];
        },

        getString: function (string, scope, context, namepsace) {
            string = this.getStringForm(string, 0, context, namepsace) || prefixDebug(string);
            string = scope ? $interpolate(string)(scope) : string;
            return addTranslatedMarkers(string);
        },

        getPlural: function (n, string, stringPlural, scope, context, namepsace) {
            var form = gettextPlurals(this.currentLanguage, n);
            string = this.getStringForm(string, form, context, namepsace) || prefixDebug(n === 1 ? string : stringPlural);
            if (scope) {
                scope.$count = n;
                string = $interpolate(string)(scope);
            }
            return addTranslatedMarkers(string);
        },

        loadRemote: function (url, namepsace) {
            return $http({
                method: 'GET',
                url: url,
                cache: catalog.cache
            }).then(function (response) {
                var data = response.data;
                for (var lang in data) {
                    catalog.setStrings(lang, data[lang], namepsace);
                }
                return response;
            });
        }
    };

    return catalog;
}]);

angular.module('gettext').directive('translate', ["gettextCatalog", "$parse", "$animate", "$compile", "$window", function (gettextCatalog, $parse, $animate, $compile, $window) {
    // Trim polyfill for old browsers (instead of jQuery)
    // Based on AngularJS-v1.2.2 (angular.js#620)
    var trim = (function () {
        if (!String.prototype.trim) {
            return function (value) {
                return (typeof value === 'string') ? value.replace(/^\s*/, '').replace(/\s*$/, '') : value;
            };
        }
        return function (value) {
            return (typeof value === 'string') ? value.trim() : value;
        };
    })();

    function assert(condition, missing, found) {
        if (!condition) {
            throw new Error('You should add a ' + missing + ' attribute whenever you add a ' + found + ' attribute.');
        }
    }

    var msie = parseInt((/msie (\d+)/.exec(angular.lowercase($window.navigator.userAgent)) || [])[1], 10);

    return {
        restrict: 'AE',
        terminal: true,
        compile: function compile(element, attrs) {
            // Validate attributes
            assert(!attrs.translatePlural || attrs.translateN, 'translate-n', 'translate-plural');
            assert(!attrs.translateN || attrs.translatePlural, 'translate-plural', 'translate-n');

            var msgid = trim(element.html());
            var translatePlural = attrs.translatePlural;
            var translateContext = attrs.translateContext;
            var namespace = attrs.translate;

            if (msie <= 8) {
                // Workaround fix relating to angular adding a comment node to
                // anchors. angular/angular.js/#1949 / angular/angular.js/#2013
                if (msgid.slice(-13) === '<!--IE fix-->') {
                    msgid = msgid.slice(0, -13);
                }
            }

            return {
                post: function (scope, element, attrs) {
                    var countFn = $parse(attrs.translateN);
                    var pluralScope = null;
                    var linking = true;

                    function update() {
                        // Fetch correct translated string.
                        var translated;
                        if (translatePlural) {
                            scope = pluralScope || (pluralScope = scope.$new());
                            scope.$count = countFn(scope);
                            translated = gettextCatalog.getPlural(scope.$count, msgid, translatePlural, null, translateContext, namespace);
                        } else {
                            translated = gettextCatalog.getString(msgid,  null, translateContext, namespace);
                        }

                        var oldContents = element.contents();

                        if (oldContents.length === 0){
                            return;
                        }

                        // Avoid redundant swaps
                        if (translated === trim(oldContents.html())){
                            // Take care of unlinked content
                            if (linking){
                                $compile(oldContents)(scope);
                            }
                            return;
                        }

                        // Swap in the translation
                        var newWrapper = angular.element('<span>' + translated + '</span>');
                        $compile(newWrapper.contents())(scope);
                        var newContents = newWrapper.contents();

                        $animate.enter(newContents, element);
                        $animate.leave(oldContents);
                    }

                    if (attrs.translateN) {
                        scope.$watch(attrs.translateN, update);
                    }

                    scope.$on('gettextLanguageChanged', update);

                    update();
                    linking = false;
                }
            };
        }
    };
}]);

angular.module('gettext').filter('translate', ["gettextCatalog", function (gettextCatalog) {
    function filter(input, context, namespace) {
        return gettextCatalog.getString(input, null, context, namespace);
    }
    filter.$stateful = true;
    return filter;
}]);

// Do not edit this file, it is autogenerated using genplurals.py!
angular.module("gettext").factory("gettextPlurals", function () {
    return function (langCode, n) {
        switch (langCode) {
            case "ay":  // Aymará
            case "bo":  // Tibetan
            case "cgg": // Chiga
            case "dz":  // Dzongkha
            case "fa":  // Persian
            case "id":  // Indonesian
            case "ja":  // Japanese
            case "jbo": // Lojban
            case "ka":  // Georgian
            case "kk":  // Kazakh
            case "km":  // Khmer
            case "ko":  // Korean
            case "ky":  // Kyrgyz
            case "lo":  // Lao
            case "ms":  // Malay
            case "my":  // Burmese
            case "sah": // Yakut
            case "su":  // Sundanese
            case "th":  // Thai
            case "tt":  // Tatar
            case "ug":  // Uyghur
            case "vi":  // Vietnamese
            case "wo":  // Wolof
            case "zh":  // Chinese
                // 1 form
                return 0;
            case "is":  // Icelandic
                // 2 forms
                return (n%10!=1 || n%100==11) ? 1 : 0;
            case "jv":  // Javanese
                // 2 forms
                return n!=0 ? 1 : 0;
            case "mk":  // Macedonian
                // 2 forms
                return n==1 || n%10==1 ? 0 : 1;
            case "ach": // Acholi
            case "ak":  // Akan
            case "am":  // Amharic
            case "arn": // Mapudungun
            case "br":  // Breton
            case "fil": // Filipino
            case "fr":  // French
            case "gun": // Gun
            case "ln":  // Lingala
            case "mfe": // Mauritian Creole
            case "mg":  // Malagasy
            case "mi":  // Maori
            case "oc":  // Occitan
            case "pt_BR":  // Brazilian Portuguese
            case "tg":  // Tajik
            case "ti":  // Tigrinya
            case "tr":  // Turkish
            case "uz":  // Uzbek
            case "wa":  // Walloon
            case "zh":  // Chinese
                // 2 forms
                return n>1 ? 1 : 0;
            case "lv":  // Latvian
                // 3 forms
                return (n%10==1 && n%100!=11 ? 0 : n != 0 ? 1 : 2);
            case "lt":  // Lithuanian
                // 3 forms
                return (n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n%100<10 || n%100>=20) ? 1 : 2);
            case "be":  // Belarusian
            case "bs":  // Bosnian
            case "hr":  // Croatian
            case "ru":  // Russian
            case "sr":  // Serbian
            case "uk":  // Ukrainian
                // 3 forms
                return (n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
            case "mnk": // Mandinka
                // 3 forms
                return (n==0 ? 0 : n==1 ? 1 : 2);
            case "ro":  // Romanian
                // 3 forms
                return (n==1 ? 0 : (n==0 || (n%100 > 0 && n%100 < 20)) ? 1 : 2);
            case "pl":  // Polish
                // 3 forms
                return (n==1 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
            case "cs":  // Czech
            case "sk":  // Slovak
                // 3 forms
                return (n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;
            case "sl":  // Slovenian
                // 4 forms
                return (n%100==1 ? 1 : n%100==2 ? 2 : n%100==3 || n%100==4 ? 3 : 0);
            case "mt":  // Maltese
                // 4 forms
                return (n==1 ? 0 : n==0 || ( n%100>1 && n%100<11) ? 1 : (n%100>10 && n%100<20 ) ? 2 : 3);
            case "gd":  // Scottish Gaelic
                // 4 forms
                return (n==1 || n==11) ? 0 : (n==2 || n==12) ? 1 : (n > 2 && n < 20) ? 2 : 3;
            case "cy":  // Welsh
                // 4 forms
                return (n==1) ? 0 : (n==2) ? 1 : (n != 8 && n != 11) ? 2 : 3;
            case "kw":  // Cornish
                // 4 forms
                return (n==1) ? 0 : (n==2) ? 1 : (n == 3) ? 2 : 3;
            case "ga":  // Irish
                // 5 forms
                return n==1 ? 0 : n==2 ? 1 : n<7 ? 2 : n<11 ? 3 : 4;
            case "ar":  // Arabic
                // 6 forms
                return (n==0 ? 0 : n==1 ? 1 : n==2 ? 2 : n%100>=3 && n%100<=10 ? 3 : n%100>=11 ? 4 : 5);
            default: // Everything else
                return n != 1 ? 1 : 0;
        }
    }
});