aboutsummaryrefslogtreecommitdiff
path: root/src/i18n.tsx
blob: dcc67890033d533085e127011d67f5883dfd1baa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/*
 This file is part of TALER
 (C) 2016 GNUnet e.V.

 TALER is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 TALER is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

"use strict";

import * as jedLib from "jed";
import {strings} from "./i18n/strings";

import * as React from "react";

console.log("jed:", jedLib);

/**
 * Information about the last two i18n results, used by plural()
 * 2-element array, each element contains { stringFound: boolean, pluralValue: number }
 */
const i18nResult = [] as any;

let lang: string;
try {
  lang = chrome.i18n.getUILanguage();
} catch (e) {
  lang = "en";
  console.warn("i18n default language not available");
}

let jed = new jedLib.Jed(strings[lang]);


class PluralNumber {
  n: number;

  constructor(n: number) {
    this.n = n;
  }

  valueOf () {
    return this.n;
  }

  toString () {
    return this.n.toString();
  }
}


/**
 * Convert template strings to a msgid
 */
function toI18nString(strings: ReadonlyArray<string>) {
  let str = "";
  for (let i = 0; i < strings.length; i++) {
    str += strings[i];
    if (i < strings.length - 1) {
      str += "%"+ (i+1) +"$s";
    }
  }
  return str;
}


/**
 * Use the first number in values to determine plural form
 */
function getPluralValue (values: any) {
  let n = null;
  for (let i = 0; i < values.length; i++) {
    if ("number" === typeof values[i] || values[i] instanceof PluralNumber) {
      if (null === n || values[i] instanceof PluralNumber) {
        n = values[i].valueOf();
      }
    }
  }
  return (null === n) ? 1 : n;
}


/**
 * Store information about the result of the last to i18n().
 *
 * @param i18nString   the string template as found in i18n.strings
 * @param pluralValue  value returned by getPluralValue()
 */
function setI18nResult (i18nString: string, pluralValue: number) {
  i18nResult[1] = i18nResult[0];
  i18nResult[0] = {
    stringFound: i18nString in strings[lang].locale_data[lang],
    pluralValue: pluralValue
  };
}


/**
 * Internationalize a string template with arbitrary serialized values.
 */
export function str(strings: TemplateStringsArray, ...values: any[]) {
  let str = toI18nString(strings);
  let n = getPluralValue(values);
  let tr = jed.translate(str).ifPlural(n, str).fetch(...values);

  setI18nResult(str, n);
  return tr;
}


/**
 * Pluralize based on first numeric parameter in the template.
 * @todo The plural argument is used for extraction by pogen.js
 */
function plural(singular: any, plural: any) {
  if (i18nResult[1].stringFound) { // string found in translation file?
    // 'singular' has the correctly translated & pluralized text
    return singular;
  } else {
    // return appropriate form based on value found in 'singular'
    return (1 == i18nResult[1].pluralValue) ? singular : plural;
  }
};

interface TranslateSwitchProps {
  target: number;
}

/**
 * Return a number that is used to determine the plural form for a template.
 */
function number(n : number) {
  return new PluralNumber (n);
};

function stringifyChildren(children: any): string {
  let n = 1;
  let ss = React.Children.map(children, (c) => {
    if (typeof c === "string") {
      return c;
    }
    return `%${n++}$s`;
  });
  return ss.join("");
}


interface TranslateProps {
  /**
   * Component that the translated element should be wrapped in.
   * Defaults to "div".
   */
  wrap?: any;

  /**
   * Props to give to the wrapped component.
   */
  wrapProps?: any;
}


export class Translate extends React.Component<TranslateProps,void> {
  render(): JSX.Element {
    let s = stringifyChildren(this.props.children);
    let tr = jed.ngettext(s, s, 1).split(/%(\d+)\$s/).filter((e: any, i: number) => i % 2 == 0);
    let childArray = React.Children.toArray(this.props.children!);
    for (let i = 0; i < childArray.length - 1; ++i) {
      if ((typeof childArray[i]) == "string" && (typeof childArray[i+1]) == "string") {
        childArray[i+i] = childArray[i] as string + childArray[i+1] as string;
        childArray.splice(i,1);
      }
    }
    let result = [];
    while (childArray.length > 0) {
      let x = childArray.shift();
      if (x === undefined) {
        continue;
      }
      if (typeof x === "string") {
        let t = tr.shift();
        result.push(t);
      } else {
        result.push(x);
      }
    }
    if (!this.props.wrap) {
      return <div>{result}</div>;
    }
    return React.createElement(this.props.wrap, this.props.wrapProps, result);
  }
}


export class TranslateSwitch extends React.Component<TranslateSwitchProps,void>{
  render(): JSX.Element {
    let singular: React.ReactElement<TranslationPluralProps> | undefined;
    let plural: React.ReactElement<TranslationPluralProps> | undefined;
    let children = this.props.children;
    if (children) {
      React.Children.forEach(children, (child: any) => {
        if (child.type == TranslatePlural) {
          plural = child;
        }
        if (child.type == TranslateSingular) {
          singular = child;
        }
      }); 
    }
    if ((!singular) || (!plural)) {
      console.error("translation not found");
      return React.createElement("span", {}, ["translation not found"]);
    }
    singular.props.target = this.props.target;
    plural.props.target = this.props.target;;
    // We're looking up the translation based on the
    // singular, even if we must use the plural form.
    return singular;
  }
}


interface TranslationPluralProps {
  target: number;
}


export class TranslatePlural extends React.Component<TranslationPluralProps,void> {
  render(): JSX.Element {
    let s = stringifyChildren(this.props.children);
    let tr = jed.ngettext(s, s, 1).split(/%(\d+)\$s/).filter((e: any, i: number) => i % 2 == 0);
    let childArray = React.Children.toArray(this.props.children!);
    for (let i = 0; i < childArray.length - 1; ++i) {
      if ((typeof childArray[i]) == "string" && (typeof childArray[i+1]) == "string") {
        childArray[i+i] = childArray[i] as string + childArray[i+1] as string;
        childArray.splice(i,1);
      }
    }
    let result = [];
    while (childArray.length > 0) {
      let x = childArray.shift();
      if (x === undefined) {
        continue;
      }
      if (typeof x === "string") {
        let t = tr.shift();
        result.push(t);
      } else {
        result.push(x);
      }
    }
    return <div>{result}</div>;
  }
}


export class TranslateSingular extends React.Component<TranslationPluralProps,void> {
  render(): JSX.Element {
    let s = stringifyChildren(this.props.children);
    let tr = jed.ngettext(s, s, 1).split(/%(\d+)\$s/).filter((e: any, i: number) => i % 2 == 0);
    let childArray = React.Children.toArray(this.props.children!);
    for (let i = 0; i < childArray.length - 1; ++i) {
      if ((typeof childArray[i]) == "string" && (typeof childArray[i+1]) == "string") {
        childArray[i+i] = childArray[i] as string + childArray[i+1] as string;
        childArray.splice(i,1);
      }
    }
    let result = [];
    while (childArray.length > 0) {
      let x = childArray.shift();
      if (x === undefined) {
        continue;
      }
      if (typeof x === "string") {
        let t = tr.shift();
        result.push(t);
      } else {
        result.push(x);
      }
    }
    return <div>{result}</div>;
  }
}