Serge Bazanski | cc25bdf | 2018-10-25 14:02:58 +0200 | [diff] [blame] | 1 | // Copyright 2013 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package cldr |
| 6 | |
| 7 | import ( |
| 8 | "encoding/xml" |
| 9 | "regexp" |
| 10 | "strconv" |
| 11 | ) |
| 12 | |
| 13 | // Elem is implemented by every XML element. |
| 14 | type Elem interface { |
| 15 | setEnclosing(Elem) |
| 16 | setName(string) |
| 17 | enclosing() Elem |
| 18 | |
| 19 | GetCommon() *Common |
| 20 | } |
| 21 | |
| 22 | type hidden struct { |
| 23 | CharData string `xml:",chardata"` |
| 24 | Alias *struct { |
| 25 | Common |
| 26 | Source string `xml:"source,attr"` |
| 27 | Path string `xml:"path,attr"` |
| 28 | } `xml:"alias"` |
| 29 | Def *struct { |
| 30 | Common |
| 31 | Choice string `xml:"choice,attr,omitempty"` |
| 32 | Type string `xml:"type,attr,omitempty"` |
| 33 | } `xml:"default"` |
| 34 | } |
| 35 | |
| 36 | // Common holds several of the most common attributes and sub elements |
| 37 | // of an XML element. |
| 38 | type Common struct { |
| 39 | XMLName xml.Name |
| 40 | name string |
| 41 | enclElem Elem |
| 42 | Type string `xml:"type,attr,omitempty"` |
| 43 | Reference string `xml:"reference,attr,omitempty"` |
| 44 | Alt string `xml:"alt,attr,omitempty"` |
| 45 | ValidSubLocales string `xml:"validSubLocales,attr,omitempty"` |
| 46 | Draft string `xml:"draft,attr,omitempty"` |
| 47 | hidden |
| 48 | } |
| 49 | |
| 50 | // Default returns the default type to select from the enclosed list |
| 51 | // or "" if no default value is specified. |
| 52 | func (e *Common) Default() string { |
| 53 | if e.Def == nil { |
| 54 | return "" |
| 55 | } |
| 56 | if e.Def.Choice != "" { |
| 57 | return e.Def.Choice |
| 58 | } else if e.Def.Type != "" { |
| 59 | // Type is still used by the default element in collation. |
| 60 | return e.Def.Type |
| 61 | } |
| 62 | return "" |
| 63 | } |
| 64 | |
| 65 | // Element returns the XML element name. |
| 66 | func (e *Common) Element() string { |
| 67 | return e.name |
| 68 | } |
| 69 | |
| 70 | // GetCommon returns e. It is provided such that Common implements Elem. |
| 71 | func (e *Common) GetCommon() *Common { |
| 72 | return e |
| 73 | } |
| 74 | |
| 75 | // Data returns the character data accumulated for this element. |
| 76 | func (e *Common) Data() string { |
| 77 | e.CharData = charRe.ReplaceAllStringFunc(e.CharData, replaceUnicode) |
| 78 | return e.CharData |
| 79 | } |
| 80 | |
| 81 | func (e *Common) setName(s string) { |
| 82 | e.name = s |
| 83 | } |
| 84 | |
| 85 | func (e *Common) enclosing() Elem { |
| 86 | return e.enclElem |
| 87 | } |
| 88 | |
| 89 | func (e *Common) setEnclosing(en Elem) { |
| 90 | e.enclElem = en |
| 91 | } |
| 92 | |
| 93 | // Escape characters that can be escaped without further escaping the string. |
| 94 | var charRe = regexp.MustCompile(`&#x[0-9a-fA-F]*;|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|\\x[0-9a-fA-F]{2}|\\[0-7]{3}|\\[abtnvfr]`) |
| 95 | |
| 96 | // replaceUnicode converts hexadecimal Unicode codepoint notations to a one-rune string. |
| 97 | // It assumes the input string is correctly formatted. |
| 98 | func replaceUnicode(s string) string { |
| 99 | if s[1] == '#' { |
| 100 | r, _ := strconv.ParseInt(s[3:len(s)-1], 16, 32) |
| 101 | return string(r) |
| 102 | } |
| 103 | r, _, _, _ := strconv.UnquoteChar(s, 0) |
| 104 | return string(r) |
| 105 | } |