rsc.io_sampler_v1.2.1.txt

     1  generated by ./addmod.bash rsc.io/sampler@v1.2.1
     2  
     3  -- .mod --
     4  module "rsc.io/sampler"
     5  
     6  require "golang.org/x/text" v0.0.0-20170915032832-14c0d48ead0c
     7  -- .info --
     8  {"Version":"v1.2.1","Name":"cac3af4f8a0ab40054fa6f8d423108a63a1255bb","Short":"cac3af4f8a0a","Time":"2018-02-13T18:16:22Z"}
     9  -- hello.go --
    10  // Copyright 2018 The Go Authors. All rights reserved.
    11  // Use of this source code is governed by a BSD-style
    12  // license that can be found in the LICENSE file.
    13  
    14  // Translations by Google Translate.
    15  
    16  package sampler
    17  
    18  var hello = newText(`
    19  
    20  English: en: Hello, world.
    21  French: fr: Bonjour le monde.
    22  Spanish: es: Hola Mundo.
    23  
    24  `)
    25  -- hello_test.go --
    26  // Copyright 2018 The Go Authors. All rights reserved.
    27  // Use of this source code is governed by a BSD-style
    28  // license that can be found in the LICENSE file.
    29  
    30  package sampler
    31  
    32  import (
    33  	"testing"
    34  
    35  	"golang.org/x/text/language"
    36  )
    37  
    38  var helloTests = []struct {
    39  	prefs []language.Tag
    40  	text  string
    41  }{
    42  	{
    43  		[]language.Tag{language.Make("en-US"), language.Make("fr")},
    44  		"Hello, world.",
    45  	},
    46  	{
    47  		[]language.Tag{language.Make("fr"), language.Make("en-US")},
    48  		"Bonjour le monde.",
    49  	},
    50  }
    51  
    52  func TestHello(t *testing.T) {
    53  	for _, tt := range helloTests {
    54  		text := Hello(tt.prefs...)
    55  		if text != tt.text {
    56  			t.Errorf("Hello(%v) = %q, want %q", tt.prefs, text, tt.text)
    57  		}
    58  	}
    59  }
    60  -- sampler.go --
    61  // Copyright 2018 The Go Authors. All rights reserved.
    62  // Use of this source code is governed by a BSD-style
    63  // license that can be found in the LICENSE file.
    64  
    65  // Package sampler shows simple texts.
    66  package sampler // import "rsc.io/sampler"
    67  
    68  import (
    69  	"os"
    70  	"strings"
    71  
    72  	"golang.org/x/text/language"
    73  )
    74  
    75  // DefaultUserPrefs returns the default user language preferences.
    76  // It consults the $LC_ALL, $LC_MESSAGES, and $LANG environment
    77  // variables, in that order.
    78  func DefaultUserPrefs() []language.Tag {
    79  	var prefs []language.Tag
    80  	for _, k := range []string{"LC_ALL", "LC_MESSAGES", "LANG"} {
    81  		if env := os.Getenv(k); env != "" {
    82  			prefs = append(prefs, language.Make(env))
    83  		}
    84  	}
    85  	return prefs
    86  }
    87  
    88  // Hello returns a localized greeting.
    89  // If no prefs are given, Hello uses DefaultUserPrefs.
    90  func Hello(prefs ...language.Tag) string {
    91  	if len(prefs) == 0 {
    92  		prefs = DefaultUserPrefs()
    93  	}
    94  	return hello.find(prefs)
    95  }
    96  
    97  // A text is a localized text.
    98  type text struct {
    99  	byTag   map[string]string
   100  	matcher language.Matcher
   101  }
   102  
   103  // newText creates a new localized text, given a list of translations.
   104  func newText(s string) *text {
   105  	t := &text{
   106  		byTag: make(map[string]string),
   107  	}
   108  	var tags []language.Tag
   109  	for _, line := range strings.Split(s, "\n") {
   110  		line = strings.TrimSpace(line)
   111  		if line == "" {
   112  			continue
   113  		}
   114  		f := strings.Split(line, ": ")
   115  		if len(f) != 3 {
   116  			continue
   117  		}
   118  		tag := language.Make(f[1])
   119  		tags = append(tags, tag)
   120  		t.byTag[tag.String()] = f[2]
   121  	}
   122  	t.matcher = language.NewMatcher(tags)
   123  	return t
   124  }
   125  
   126  // find finds the text to use for the given language tag preferences.
   127  func (t *text) find(prefs []language.Tag) string {
   128  	tag, _, _ := t.matcher.Match(prefs...)
   129  	s := t.byTag[tag.String()]
   130  	if strings.HasPrefix(s, "RTL ") {
   131  		s = "\u200F" + strings.TrimPrefix(s, "RTL ") + "\u200E"
   132  	}
   133  	return s
   134  }
   135
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