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
|
/*
* Copyright (c) 2017-present Robert Jaros
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package pl.treksoft.kvision.i18n
import org.w3c.xhr.XMLHttpRequest
import pl.treksoft.kvision.panel.Root
import kotlin.browser.window
import kotlin.js.Promise
external class Jed(json: dynamic) {
fun gettext(key: String): String
fun ngettext(singularKey: String, pluralKey: String, value: Int): String
fun sprintf(format: String, value: Int): String
}
private const val I18N_SINGLE_DELIMITER = "###KvI18nS###"
private const val I18N_PLURAL_DELIMITER = "###KvI18nP###"
/**
* A singleton object used for translations.
*/
object I18n {
private val defaultLanguage = window.navigator.language.split("-")[0]
/**
* Main language of the application.
*/
var language = defaultLanguage
set(value) {
field = value
Root.roots.forEach { it.restart() }
}
private val cache = mutableMapOf<String, Jed>()
/**
* I18n initialization function.
* Should be called in the main function of the application.
* @param languages a list of supported languages.
* @param initCallback a code to run after the initialization process is complete.
*/
fun init(vararg languages: String, initCallback: () -> Unit) {
val promises = languages.map {
I18n.readMessages(it)
}.toTypedArray()
Promise.all(promises).then { initCallback() }
}
private fun readMessages(language: String): Promise<Jed> {
return Promise { resolve, _ ->
val xmlHttpRequest = XMLHttpRequest()
xmlHttpRequest.overrideMimeType("application/json")
xmlHttpRequest.open("GET", "js/messages-$language.json", true)
xmlHttpRequest.onreadystatechange = {
if (xmlHttpRequest.readyState.toInt() == 4 && (xmlHttpRequest.status.toInt() == 200 ||
xmlHttpRequest.status.toInt() == 0)
) {
val json = JSON.parse<dynamic>(xmlHttpRequest.responseText)
val jed = Jed(json)
cache[language] = jed
resolve(jed)
}
}
xmlHttpRequest.send()
}
}
/**
* A static translation function for a singular form.
* @param key a translation key.
* @return translated text.
*/
fun gettext(key: String): String {
return cache[language]?.gettext(key) ?: key
}
/**
* A static translation function for a plural form.
* @param singularKey a translation key for a singular form.
* @param pluralKey a translation key for a plural form.
* @param value a count value.
* @return translated text.
*/
fun ngettext(singularKey: String, pluralKey: String, value: Int): String {
return cache[language]?.run {
sprintf(ngettext(singularKey, pluralKey, value), value)
} ?: if (value == 1) singularKey else pluralKey
}
/**
* A dynamic translation function for a singular form.
* @param key a translation key.
* @return text marked for a dynamic translation.
*/
fun tr(key: String): String {
return I18N_SINGLE_DELIMITER + key
}
/**
* A dynamic translation function for a plural form.
* @param singularKey a translation key for a singular form.
* @param pluralKey a translation key for a plural form.
* @param value a count value.
* @return text marked for a dynamic translation.
*/
fun ntr(singularKey: String, pluralKey: String, value: Int): String {
return I18N_PLURAL_DELIMITER + singularKey + I18N_PLURAL_DELIMITER + pluralKey + I18N_PLURAL_DELIMITER + value
}
internal fun trans(text: String): String {
return if (text.startsWith(I18N_SINGLE_DELIMITER)) {
gettext(text.substring(I18N_SINGLE_DELIMITER.length))
} else if (text.startsWith(I18N_PLURAL_DELIMITER)) {
val tab = text.substring(I18N_PLURAL_DELIMITER.length).split(I18N_PLURAL_DELIMITER)
if (tab.size == 3) {
ngettext(tab[0], tab[1], tab[2].toIntOrNull() ?: 1)
} else {
text
}
} else {
text
}
}
internal fun trans(text: String?): String? {
return text?.let {
trans(it)
}
}
}
|
