vanilla-wow-addons – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | --[[ |
2 | Name: AceHook-2.1 |
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3 | Revision: $Rev: 16186 $ |
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4 | Developed by: The Ace Development Team (http://www.wowace.com/index.php/The_Ace_Development_Team) |
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5 | Inspired By: Ace 1.x by Turan (turan@gryphon.com) |
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6 | Website: http://www.wowace.com/ |
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7 | Documentation: http://www.wowace.com/index.php/AceHook-2.1 |
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8 | SVN: http://svn.wowace.com/root/trunk/Ace2/AceHook-2.1 |
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9 | Description: Mixin to allow for safe hooking of functions, methods, and scripts. |
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10 | Dependencies: AceLibrary, AceOO-2.0 |
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11 | ]] |
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12 | |||
13 | local MAJOR_VERSION = "AceHook-2.1" |
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14 | local MINOR_VERSION = "$Revision: 16186 $" |
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15 | |||
16 | -- This ensures the code is only executed if the libary doesn't already exist, or is a newer version |
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17 | if not AceLibrary then error(MAJOR_VERSION .. " requires AceLibrary.") end |
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18 | if not AceLibrary:IsNewVersion(MAJOR_VERSION, MINOR_VERSION) then return end |
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19 | |||
20 | if not AceLibrary:HasInstance("AceOO-2.0") then error(MAJOR_VERSION .. " requires AceOO-2.0") end |
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21 | |||
22 | --[[--------------------------------------------------------------------------------- |
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23 | Create the library object |
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24 | ----------------------------------------------------------------------------------]] |
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25 | |||
26 | local AceOO = AceLibrary:GetInstance("AceOO-2.0") |
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27 | local AceHook = AceOO.Mixin { |
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28 | "Hook", |
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29 | "HookScript", |
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30 | "SecureHook", |
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31 | "Unhook", |
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32 | "UnhookAll", |
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33 | "HookReport", |
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34 | "IsHooked", |
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35 | } |
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36 | |||
37 | --[[--------------------------------------------------------------------------------- |
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38 | Library Definitions |
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39 | ----------------------------------------------------------------------------------]] |
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40 | |||
41 | local protFuncs = { |
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42 | CameraOrSelectOrMoveStart = true, CameraOrSelectOrMoveStop = true, |
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43 | TurnOrActionStart = true, TurnOrActionStop = true, |
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44 | PitchUpStart = true, PitchUpStop = true, |
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45 | PitchDownStart = true, PitchDownStop = true, |
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46 | MoveBackwardStart = true, MoveBackwardStop = true, |
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47 | MoveForwardStart = true, MoveForwardStop = true, |
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48 | Jump = true, StrafeLeftStart = true, |
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49 | StrafeLeftStop = true, StrafeRightStart = true, |
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50 | StrafeRightStop = true, ToggleMouseMove = true, |
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51 | ToggleRun = true, TurnLeftStart = true, |
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52 | TurnLeftStop = true, TurnRightStart = true, |
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53 | TurnRightStop = true, |
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54 | } |
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55 | |||
56 | local function issecurevariable(x) |
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57 | if protFuncs[x] then |
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58 | return 1 |
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59 | else |
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60 | return nil |
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61 | end |
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62 | end |
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63 | |||
64 | local _G = getfenv(0) |
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65 | |||
66 | local function hooksecurefunc(arg1, arg2, arg3) |
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67 | if type(arg1) == "string" then |
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68 | arg1, arg2, arg3 = _G, arg1, arg2 |
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69 | end |
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70 | local orig = arg1[arg2] |
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71 | arg1[arg2] = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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72 | local x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20 = orig(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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73 | |||
74 | arg3(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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75 | |||
76 | return x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20 |
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77 | end |
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78 | end |
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79 | |||
80 | local protectedScripts = { |
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81 | OnClick = true, |
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82 | } |
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83 | |||
84 | |||
85 | local handlers, scripts, actives, registry |
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86 | |||
87 | --[[--------------------------------------------------------------------------------- |
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88 | Private definitions (Not exposed) |
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89 | ----------------------------------------------------------------------------------]] |
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90 | |||
91 | local new, del |
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92 | do |
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93 | local list = setmetatable({}, {__mode = "k"}) |
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94 | function new() |
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95 | local t = next(list) |
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96 | if not t then |
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97 | return {} |
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98 | end |
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99 | list[t] = nil |
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100 | return t |
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101 | end |
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102 | |||
103 | function del(t) |
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104 | setmetatable(t, nil) |
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105 | for k in pairs(t) do |
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106 | t[k] = nil |
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107 | end |
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108 | list[t] = true |
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109 | end |
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110 | end |
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111 | |||
112 | local function createFunctionHook(self, func, handler, orig, secure) |
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113 | if not secure then |
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114 | if type(handler) == "string" then |
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115 | -- The handler is a method, need to self it |
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116 | local uid |
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117 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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118 | if actives[uid] then |
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119 | return self[handler](self, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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120 | else |
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121 | return orig(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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122 | end |
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123 | end |
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124 | return uid |
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125 | else |
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126 | -- The handler is a function, just call it |
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127 | local uid |
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128 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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129 | if actives[uid] then |
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130 | return handler(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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131 | else |
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132 | return orig(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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133 | end |
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134 | end |
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135 | return uid |
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136 | end |
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137 | else |
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138 | -- secure hooks don't call the original method |
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139 | if type(handler) == "string" then |
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140 | -- The handler is a method, need to self it |
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141 | local uid |
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142 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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143 | if actives[uid] then |
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144 | return self[handler](self, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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145 | end |
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146 | end |
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147 | return uid |
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148 | else |
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149 | -- The handler is a function, just call it |
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150 | local uid |
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151 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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152 | if actives[uid] then |
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153 | return handler(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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154 | end |
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155 | end |
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156 | return uid |
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157 | end |
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158 | end |
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159 | end |
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160 | |||
161 | local function createMethodHook(self, object, method, handler, orig, secure, script) |
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162 | if script then |
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163 | if type(handler) == "string" then |
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164 | local uid |
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165 | uid = function() |
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166 | if actives[uid] then |
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167 | return self[handler](self, object) |
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168 | else |
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169 | return orig() |
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170 | end |
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171 | end |
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172 | return uid |
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173 | else |
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174 | -- The handler is a function, just call it |
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175 | local uid |
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176 | uid = function() |
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177 | if actives[uid] then |
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178 | return handler(object) |
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179 | else |
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180 | return orig() |
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181 | end |
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182 | end |
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183 | return uid |
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184 | end |
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185 | elseif not secure then |
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186 | if type(handler) == "string" then |
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187 | local uid |
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188 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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189 | if actives[uid] then |
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190 | return self[handler](self, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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191 | else |
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192 | return orig(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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193 | end |
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194 | end |
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195 | return uid |
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196 | else |
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197 | -- The handler is a function, just call it |
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198 | local uid |
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199 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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200 | if actives[uid] then |
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201 | return handler(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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202 | else |
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203 | return orig(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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204 | end |
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205 | end |
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206 | return uid |
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207 | end |
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208 | else |
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209 | -- secure hooks don't call the original method |
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210 | if type(handler) == "string" then |
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211 | local uid |
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212 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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213 | if actives[uid] then |
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214 | return self[handler](self, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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215 | end |
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216 | end |
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217 | return uid |
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218 | else |
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219 | -- The handler is a function, just call it |
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220 | local uid |
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221 | uid = function(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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222 | if actives[uid] then |
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223 | return handler(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,a20) |
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224 | end |
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225 | end |
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226 | return uid |
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227 | end |
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228 | end |
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229 | end |
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230 | |||
231 | local function hookFunction(self, func, handler, secure) |
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232 | local orig = _G[func] |
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233 | |||
234 | if not orig or type(orig) ~= "function" then |
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235 | AceHook:error("Attempt to hook a non-existant function %q", func) |
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236 | end |
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237 | |||
238 | if not handler then |
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239 | handler = func |
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240 | end |
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241 | |||
242 | if registry[self][func] then |
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243 | local uid = registry[self][func] |
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244 | |||
245 | if actives[uid] then |
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246 | -- We have an active hook from this source. Don't multi-hook |
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247 | AceHook:error("%q already has an active hook from this source.", func) |
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248 | end |
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249 | |||
250 | if handlers[uid] == handler then |
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251 | -- The hook is inactive, so reactivate it |
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252 | actives[uid] = true |
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253 | return |
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254 | else |
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255 | AceHook:error("There is a stale hook for %q can't hook or reactivate.", func) |
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256 | end |
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257 | end |
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258 | |||
259 | if type(handler) == "string" then |
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260 | if type(self[handler]) ~= "function" then |
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261 | AceHook:error("Could not find the the handler %q when hooking function %q", handler, func) |
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262 | end |
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263 | elseif type(handler) ~= "function" then |
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264 | AceHook:error("Could not find the handler you supplied when hooking %q", func) |
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265 | end |
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266 | |||
267 | local uid = createFunctionHook(self, func, handler, orig, secure) |
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268 | registry[self][func] = uid |
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269 | actives[uid] = true |
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270 | handlers[uid] = handler |
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271 | |||
272 | if not secure then |
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273 | _G[func] = uid |
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274 | self.hooks[func] = orig |
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275 | else |
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276 | hooksecurefunc(func, uid) |
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277 | end |
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278 | end |
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279 | |||
280 | local function unhookFunction(self, func) |
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281 | if not registry[self][func] then |
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282 | AceHook:error("Tried to unhook %q which is not currently hooked.", func) |
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283 | end |
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284 | |||
285 | local uid = registry[self][func] |
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286 | |||
287 | if actives[uid] then |
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288 | -- See if we own the global function |
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289 | if self.hooks[func] and _G[func] == uid then |
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290 | _G[func] = self.hooks[func] |
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291 | self.hooks[func] = nil |
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292 | registry[self][func] = nil |
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293 | handlers[uid] = nil |
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294 | scripts[uid] = nil |
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295 | actives[uid] = nil |
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296 | -- Magically all-done |
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297 | else |
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298 | actives[uid] = nil |
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299 | end |
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300 | end |
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301 | end |
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302 | |||
303 | local function hookMethod(self, obj, method, handler, script, secure) |
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304 | if not handler then |
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305 | handler = method |
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306 | end |
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307 | |||
308 | if not obj or type(obj) ~= "table" then |
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309 | AceHook:error("The object you supplied could not be found, or isn't a table.") |
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310 | end |
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311 | |||
312 | local uid = registry[self][obj] and registry[self][obj][method] |
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313 | if uid then |
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314 | if actives[uid] then |
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315 | -- We have an active hook from this source. Don't multi-hook |
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316 | AceHook:error("%q already has an active hook from this source.", method) |
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317 | end |
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318 | |||
319 | if handlers[uid] == handler then |
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320 | -- The hook is inactive, reactivate it. |
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321 | actives[uid] = true |
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322 | return |
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323 | else |
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324 | AceHook:error("There is a stale hook for %q can't hook or reactivate.", method) |
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325 | end |
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326 | end |
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327 | |||
328 | if type(handler) == "string" then |
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329 | if type(self[handler]) ~= "function" then |
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330 | AceHook:error("Could not find the handler %q you supplied when hooking method %q", handler, method) |
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331 | end |
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332 | elseif type(handler) ~= "function" then |
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333 | AceHook:error("Could not find the handler you supplied when hooking method %q", method) |
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334 | end |
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335 | |||
336 | local orig |
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337 | if script then |
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338 | if not obj.GetScript then |
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339 | AceHook:error("The object you supplied does not have a GetScript method.") |
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340 | end |
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341 | if not obj:HasScript(method) then |
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342 | AceHook:error("The object you supplied doesn't allow the %q method.", method) |
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343 | end |
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344 | |||
345 | orig = obj:GetScript(method) |
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346 | if type(orig) ~= "function" then |
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347 | -- Sometimes there is not a original function for a script. |
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348 | orig = function() end |
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349 | end |
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350 | else |
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351 | orig = obj[method] |
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352 | end |
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353 | if not orig then |
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354 | AceHook:error("Could not find the method or script %q you are trying to hook.", method) |
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355 | end |
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356 | |||
357 | if not registry[self][obj] then |
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358 | registry[self][obj] = new() |
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359 | end |
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360 | |||
361 | if not self.hooks[obj] then |
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362 | self.hooks[obj] = new() |
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363 | end |
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364 | |||
365 | local uid = createMethodHook(self, obj, method, handler, orig, secure, script) |
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366 | registry[self][obj][method] = uid |
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367 | actives[uid] = true |
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368 | handlers[uid] = handler |
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369 | scripts[uid] = script and true or nil |
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370 | |||
371 | if script then |
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372 | obj:SetScript(method, uid) |
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373 | self.hooks[obj][method] = orig |
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374 | elseif not secure then |
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375 | obj[method] = uid |
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376 | self.hooks[obj][method] = orig |
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377 | else |
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378 | hooksecurefunc(obj, method, uid) |
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379 | end |
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380 | end |
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381 | |||
382 | local function unhookMethod(self, obj, method) |
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383 | if not registry[self][obj] or not registry[self][obj][method] then |
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384 | AceHook:error("Attempt to unhook a method %q that is not currently hooked.", method) |
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385 | return |
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386 | end |
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387 | |||
388 | local uid = registry[self][obj][method] |
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389 | |||
390 | if actives[uid] then |
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391 | if scripts[uid] then -- If this is a script |
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392 | if obj:GetScript(method) == uid then |
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393 | -- We own the script. Revert to normal. |
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394 | obj:SetScript(method, self.hooks[obj][method]) |
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395 | self.hooks[obj][method] = nil |
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396 | registry[self][obj][method] = nil |
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397 | handlers[uid] = nil |
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398 | scripts[uid] = nil |
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399 | actives[uid] = nil |
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400 | else |
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401 | actives[uid] = nil |
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402 | end |
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403 | else |
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404 | if self.hooks[obj] and self.hooks[obj][method] and obj[method] == uid then |
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405 | -- We own the method. Revert to normal. |
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406 | obj[method] = self.hooks[obj][method] |
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407 | self.hooks[obj][method] = nil |
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408 | registry[self][obj][method] = nil |
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409 | handlers[uid] = nil |
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410 | actives[uid] = nil |
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411 | else |
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412 | actives[uid] = nil |
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413 | end |
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414 | end |
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415 | end |
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416 | if self.hooks[obj] and not next(self.hooks[obj]) then |
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417 | self.hooks[obj] = del(self.hooks[obj]) |
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418 | end |
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419 | if not next(registry[self][obj]) then |
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420 | registry[self][obj] = del(registry[self][obj]) |
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421 | end |
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422 | end |
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423 | |||
424 | -- ("function" [, handler] [, hookSecure]) or (object, "method" [, handler] [, hookSecure]) |
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425 | function AceHook:Hook(object, method, handler, hookSecure) |
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426 | if type(object) == "string" then |
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427 | method, handler, hookSecure = object, method, handler |
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428 | if handler == true then |
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429 | handler, hookSecure = nil, true |
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430 | end |
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431 | if not hookSecure and issecurevariable(method) then |
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432 | AceHook:error("Attempt to hook secure function %q. Use `SecureHook' or add `true' to the argument list to override.", method) |
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433 | end |
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434 | AceHook:argCheck(handler, 3, "function", "string", "nil") |
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435 | AceHook:argCheck(hookSecure, 4, "boolean", "nil") |
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436 | hookFunction(self, method, handler, false) |
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437 | else |
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438 | if handler == true then |
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439 | handler, hookSecure = nil, true |
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440 | end |
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441 | if not hookSecure and issecurevariable(object, method) then |
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442 | AceHook:error("Attempt to hook secure method %q. Use `SecureHook' or add `true' to the argument list to override.", method) |
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443 | end |
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444 | AceHook:argCheck(object, 2, "table") |
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445 | AceHook:argCheck(method, 3, "string") |
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446 | AceHook:argCheck(handler, 4, "function", "string", "nil") |
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447 | AceHook:argCheck(hookSecure, 5, "boolean", "nil") |
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448 | hookMethod(self, object, method, handler, false, false) |
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449 | end |
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450 | end |
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451 | |||
452 | -- ("function", handler) or (object, "method", handler) |
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453 | function AceHook:SecureHook(object, method, handler) |
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454 | if type(object) == "string" then |
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455 | method, handler = object, method |
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456 | AceHook:argCheck(handler, 3, "function", "string", "nil") |
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457 | hookFunction(self, method, handler, true) |
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458 | else |
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459 | AceHook:argCheck(object, 2, "table") |
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460 | AceHook:argCheck(method, 3, "string") |
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461 | AceHook:argCheck(handler, 4, "function", "string", "nil") |
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462 | hookMethod(self, object, method, handler, false, true) |
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463 | end |
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464 | end |
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465 | |||
466 | function AceHook:HookScript(frame, script, handler) |
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467 | AceHook:argCheck(frame, 2, "table") |
||
468 | if not frame[0] or type(frame.IsFrameType) ~= "function" then |
||
469 | AceHook:error("Bad argument #2 to `HookScript'. Expected frame.") |
||
470 | end |
||
471 | AceHook:argCheck(script, 3, "string") |
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472 | AceHook:argCheck(handler, 4, "function", "string", "nil") |
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473 | hookMethod(self, frame, script, handler, true, false) |
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474 | end |
||
475 | |||
476 | -- ("function") or (object, "method") |
||
477 | function AceHook:IsHooked(obj, method) |
||
478 | if type(obj) == "string" then |
||
479 | if registry[self][obj] and actives[registry[self][obj]] then |
||
480 | return true, handlers[registry[self][obj]] |
||
481 | end |
||
482 | else |
||
483 | AceHook:argCheck(obj, 2, "string", "table") |
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484 | AceHook:argCheck(method, 3, "string") |
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485 | if registry[self][obj] and registry[self][obj][method] and actives[registry[self][obj][method]] then |
||
486 | return true, handlers[registry[self][obj][method]] |
||
487 | end |
||
488 | end |
||
489 | |||
490 | return false, nil |
||
491 | end |
||
492 | |||
493 | -- ("function") or (object, "method") |
||
494 | function AceHook:Unhook(obj, method) |
||
495 | if type(obj) == "string" then |
||
496 | unhookFunction(self, obj) |
||
497 | else |
||
498 | AceHook:argCheck(obj, 2, "string", "table") |
||
499 | AceHook:argCheck(method, 3, "string") |
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500 | unhookMethod(self, obj, method) |
||
501 | end |
||
502 | end |
||
503 | |||
504 | function AceHook:UnhookAll() |
||
505 | for key, value in pairs(registry[self]) do |
||
506 | if type(key) == "table" then |
||
507 | for method in pairs(value) do |
||
508 | self:Unhook(key, method) |
||
509 | end |
||
510 | else |
||
511 | self:Unhook(key) |
||
512 | end |
||
513 | end |
||
514 | end |
||
515 | |||
516 | function AceHook:HookReport() |
||
517 | DEFAULT_CHAT_FRAME:AddMessage("This is a list of all active hooks for this object:") |
||
518 | if not next(registry[self]) then |
||
519 | DEFAULT_CHAT_FRAME:AddMessage("No hooks") |
||
520 | end |
||
521 | |||
522 | for key, value in pairs(registry[self]) do |
||
523 | if type(value) == "table" then |
||
524 | for method, uid in pairs(value) do |
||
525 | DEFAULT_CHAT_FRAME:AddMessage(string.format("object: %s method: %q |cff%s|r%s", tostring(key), method, actives[uid] and "00ff00Active" or "ffff00Inactive", not self.hooks[key][method] and " |cff7f7fff-Secure-|r" or "")) |
||
526 | end |
||
527 | else |
||
528 | DEFAULT_CHAT_FRAME:AddMessage(string.format("function: %q |cff%s|r%s", tostring(key), actives[value] and "00ff00Active" or "ffff00Inactive", not self.hooks[key] and " |cff7f7fff-Secure-|r" or "")) |
||
529 | end |
||
530 | end |
||
531 | end |
||
532 | |||
533 | function AceHook:OnInstanceInit(object) |
||
534 | if not object.hooks then |
||
535 | object.hooks = new() |
||
536 | end |
||
537 | if not registry[object] then |
||
538 | registry[object] = new() |
||
539 | end |
||
540 | end |
||
541 | |||
542 | AceHook.OnManualEmbed = AceHook.OnInstanceInit |
||
543 | |||
544 | function AceHook:OnEmbedDisable(target) |
||
545 | self.UnhookAll(target) |
||
546 | end |
||
547 | |||
548 | local function activate(self, oldLib, oldDeactivate) |
||
549 | AceHook = self |
||
550 | |||
551 | self.handlers = oldLib and oldLib.handlers or {} |
||
552 | self.registry = oldLib and oldLib.registry or {} |
||
553 | self.scripts = oldLib and oldLib.scripts or {} |
||
554 | self.actives = oldLib and oldLib.actives or {} |
||
555 | |||
556 | handlers = self.handlers |
||
557 | registry = self.registry |
||
558 | scripts = self.scripts |
||
559 | actives = self.actives |
||
560 | |||
561 | AceHook.super.activate(self, oldLib, oldDeactivate) |
||
562 | |||
563 | if oldDeactivate then |
||
564 | oldDeactivate(oldLib) |
||
565 | end |
||
566 | end |
||
567 | |||
568 | AceLibrary:Register(AceHook, MAJOR_VERSION, MINOR_VERSION, activate) |