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1 --- **AceLocale-3.0** manages localization in addons, allowing for multiple locale to be registered with fallback to the base locale for untranslated strings.
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2 -- @class file
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3 -- @name AceLocale-3.0
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4 -- @release $Id: AceLocale-3.0.lua 895 2009-12-06 16:28:55Z nevcairiel $
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5 local MAJOR,MINOR = "AceLocale-3.0", 2
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6
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7 local AceLocale, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
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8
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9 if not AceLocale then return end -- no upgrade needed
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10
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11 -- Lua APIs
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12 local assert, tostring, error = assert, tostring, error
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13 local setmetatable, rawset, rawget = setmetatable, rawset, rawget
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14
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15 -- Global vars/functions that we don't upvalue since they might get hooked, or upgraded
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16 -- List them here for Mikk's FindGlobals script
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17 -- GLOBALS: GAME_LOCALE, geterrorhandler
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18
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19 local gameLocale = GetLocale()
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20 if gameLocale == "enGB" then
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21 gameLocale = "enUS"
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22 end
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23
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24 AceLocale.apps = AceLocale.apps or {} -- array of ["AppName"]=localetableref
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25 AceLocale.appnames = AceLocale.appnames or {} -- array of [localetableref]="AppName"
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26
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27 -- This metatable is used on all tables returned from GetLocale
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28 local readmeta = {
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29 __index = function(self, key) -- requesting totally unknown entries: fire off a nonbreaking error and return key
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30 rawset(self, key, key) -- only need to see the warning once, really
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31 geterrorhandler()(MAJOR..": "..tostring(AceLocale.appnames[self])..": Missing entry for '"..tostring(key).."'")
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32 return key
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33 end
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34 }
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35
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36 -- This metatable is used on all tables returned from GetLocale if the silent flag is true, it does not issue a warning on unknown keys
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37 local readmetasilent = {
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38 __index = function(self, key) -- requesting totally unknown entries: return key
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39 rawset(self, key, key) -- only need to invoke this function once
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40 return key
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41 end
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42 }
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43
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44 -- Remember the locale table being registered right now (it gets set by :NewLocale())
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45 -- NOTE: Do never try to register 2 locale tables at once and mix their definition.
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46 local registering
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47
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48 -- local assert false function
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49 local assertfalse = function() assert(false) end
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50
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51 -- This metatable proxy is used when registering nondefault locales
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52 local writeproxy = setmetatable({}, {
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53 __newindex = function(self, key, value)
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54 rawset(registering, key, value == true and key or value) -- assigning values: replace 'true' with key string
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55 end,
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56 __index = assertfalse
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57 })
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58
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59 -- This metatable proxy is used when registering the default locale.
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60 -- It refuses to overwrite existing values
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61 -- Reason 1: Allows loading locales in any order
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62 -- Reason 2: If 2 modules have the same string, but only the first one to be
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63 -- loaded has a translation for the current locale, the translation
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64 -- doesn't get overwritten.
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65 --
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66 local writedefaultproxy = setmetatable({}, {
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67 __newindex = function(self, key, value)
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68 if not rawget(registering, key) then
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69 rawset(registering, key, value == true and key or value)
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70 end
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71 end,
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72 __index = assertfalse
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73 })
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74
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75 --- Register a new locale (or extend an existing one) for the specified application.
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76 -- :NewLocale will return a table you can fill your locale into, or nil if the locale isn't needed for the players
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77 -- game locale.
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78 -- @paramsig application, locale[, isDefault[, silent]]
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79 -- @param application Unique name of addon / module
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80 -- @param locale Name of the locale to register, e.g. "enUS", "deDE", etc.
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81 -- @param isDefault If this is the default locale being registered (your addon is written in this language, generally enUS)
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82 -- @param silent If true, the locale will not issue warnings for missing keys. Can only be set on the default locale.
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83 -- @usage
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84 -- -- enUS.lua
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85 -- local L = LibStub("AceLocale-3.0"):NewLocale("TestLocale", "enUS", true)
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86 -- L["string1"] = true
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87 --
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88 -- -- deDE.lua
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89 -- local L = LibStub("AceLocale-3.0"):NewLocale("TestLocale", "deDE")
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90 -- if not L then return end
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91 -- L["string1"] = "Zeichenkette1"
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92 -- @return Locale Table to add localizations to, or nil if the current locale is not required.
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93 function AceLocale:NewLocale(application, locale, isDefault, silent)
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94
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95 if silent and not isDefault then
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96 error("Usage: NewLocale(application, locale[, isDefault[, silent]]): 'silent' can only be specified for the default locale", 2)
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97 end
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98
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99 -- GAME_LOCALE allows translators to test translations of addons without having that wow client installed
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100 -- Ammo: I still think this is a bad idea, for instance an addon that checks for some ingame string will fail, just because some other addon
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101 -- gives the user the illusion that they can run in a different locale? Ditch this whole thing or allow a setting per 'application'. I'm of the
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102 -- opinion to remove this.
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103 local gameLocale = GAME_LOCALE or gameLocale
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104
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105 if locale ~= gameLocale and not isDefault then
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106 return -- nop, we don't need these translations
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107 end
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108
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109 local app = AceLocale.apps[application]
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110
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111 if not app then
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112 app = setmetatable({}, silent and readmetasilent or readmeta)
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113 AceLocale.apps[application] = app
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114 AceLocale.appnames[app] = application
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115 end
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116
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117 registering = app -- remember globally for writeproxy and writedefaultproxy
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118
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119 if isDefault then
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120 return writedefaultproxy
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121 end
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122
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123 return writeproxy
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124 end
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125
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126 --- Returns localizations for the current locale (or default locale if translations are missing).
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127 -- Errors if nothing is registered (spank developer, not just a missing translation)
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128 -- @param application Unique name of addon / module
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129 -- @param silent If true, the locale is optional, silently return nil if it's not found (defaults to false, optional)
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130 -- @return The locale table for the current language.
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131 function AceLocale:GetLocale(application, silent)
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132 if not silent and not AceLocale.apps[application] then
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133 error("Usage: GetLocale(application[, silent]): 'application' - No locales registered for '"..tostring(application).."'", 2)
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134 end
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135 return AceLocale.apps[application]
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136 end
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