|
| 1 | ++(function (scope) { |
| 2 | + |
| 3 | + 'use strict'; |
| 4 | + |
| 5 | + var slice = Array.prototype.slice, |
| 6 | + undef = undefined, |
| 7 | + transReq = scope.transforms.request, |
| 8 | + transRes = scope.transforms.response, |
| 9 | + listenerMap = {}, |
| 10 | + portMap = {}, |
| 11 | + objCache = {}; |
| 12 | + |
| 13 | + chrome.app.runtime.onLaunched.addListener(function () { |
| 14 | + |
| 15 | + chrome.app.window.create('status.html', { |
| 16 | + id: "status", |
| 17 | + innerBounds: { |
| 18 | + width: 480, |
| 19 | + height: 640, |
| 20 | + minWidth: 480, |
| 21 | + maxWidth: 480, |
| 22 | + minHeight: 640, |
| 23 | + maxHeight: 640 |
| 24 | + } |
| 25 | + }); |
| 26 | + |
| 27 | + chrome.runtime.onConnectExternal.addListener(function (port) { |
| 28 | + if (!port.name) { |
| 29 | + return; |
| 30 | + } |
| 31 | + |
| 32 | + portMap[port.name] = port; |
| 33 | + |
| 34 | + port.onMessage.addListener(function (msg) { |
| 35 | + if (msg.method) { |
| 36 | + invoke(port.name, msg.id, msg.method, msg.params); |
| 37 | + } |
| 38 | + }); |
| 39 | + |
| 40 | + port.onDisconnect.addListener(function (port) { |
| 41 | + delete portMap[port.name]; |
| 42 | + cleanupListener(port.name); |
| 43 | + }); |
| 44 | + }); |
| 45 | + |
| 46 | + }); |
| 47 | + |
| 48 | + function invoke(senderId, id, method, params) { |
| 49 | + var m = normalize(method), |
| 50 | + obj = resolve(m), |
| 51 | + ctx = resolve(m.split('.').slice(0, -1).join('.')); |
| 52 | + |
| 53 | + if (m.indexOf('.addListener') === m.length - 12) { |
| 54 | + addListener(m.substr(0, m.length - 12), senderId, id); |
| 55 | + } else if (m.indexOf('.removeListener') === m.length - 15) { |
| 56 | + removeListener(m.substr(0, m.length - 15), senderId, id); |
| 57 | + } else { |
| 58 | + if (typeof obj === 'function') { |
| 59 | + params = transformParams(m, params, transReq, ctx); |
| 60 | + try { |
| 61 | + obj.apply(ctx, params.concat(callback)); |
| 62 | + } catch (e) { |
| 63 | + portMap[senderId].postMessage({ |
| 64 | + jsonrpc: '2.0', |
| 65 | + id: id, |
| 66 | + exception: e.message |
| 67 | + }); |
| 68 | + } |
| 69 | + } |
| 70 | + |
| 71 | + function callback() { |
| 72 | + var args = slice.call(arguments), |
| 73 | + port = portMap[senderId]; |
| 74 | + |
| 75 | + if (!port) { |
| 76 | + delete portMap[senderId]; |
| 77 | + cleanupListener(senderId); |
| 78 | + return; |
| 79 | + } |
| 80 | + |
| 81 | + if (chrome.runtime.lastError) { |
| 82 | + port.postMessage({ |
| 83 | + jsonrpc: '2.0', |
| 84 | + id: id, |
| 85 | + error: chrome.runtime.lastError.message |
| 86 | + }); |
| 87 | + } else { |
| 88 | + args = transformParams(m, args, transRes, ctx); |
| 89 | + port.postMessage({ |
| 90 | + jsonrpc: '2.0', |
| 91 | + id: id, |
| 92 | + result: args |
| 93 | + }); |
| 94 | + } |
| 95 | + } |
| 96 | + } |
| 97 | + } |
| 98 | + |
| 99 | + function transformParams(name, params, map, ctx) { |
| 100 | + var func = map[name]; |
| 101 | + |
| 102 | + if (typeof func === 'function') { |
| 103 | + return func.apply(ctx, params); |
| 104 | + } |
| 105 | + return params; |
| 106 | + } |
| 107 | + |
| 108 | + function addListener(objName, portName, id) { |
| 109 | + if (listenerMap[objName]) { |
| 110 | + listenerMap[objName].receivers.push({ |
| 111 | + portName: portName, |
| 112 | + id: id |
| 113 | + }); |
| 114 | + } else { |
| 115 | + listenerMap[objName] = { |
| 116 | + listener: function () { |
| 117 | + var args = transformParams(objName + '.addListener', slice.call(arguments), |
| 118 | + transRes, resolve(objName)); |
| 119 | + |
| 120 | + listenerMap[objName].receivers.forEach(function (receiver, idx) { |
| 121 | + var rcvPort = receiver.portName; |
| 122 | + |
| 123 | + if (!portMap[rcvPort]) { |
| 124 | + delete portMap[rcvPort]; |
| 125 | + cleanupListener(rcvPort); |
| 126 | + } else { |
| 127 | + portMap[rcvPort].postMessage({ |
| 128 | + jsonrpc: '2.0', |
| 129 | + id: receiver.id, |
| 130 | + result: args |
| 131 | + }); |
| 132 | + } |
| 133 | + }); |
| 134 | + }, |
| 135 | + receivers: [{ |
| 136 | + portName: portName, |
| 137 | + id: id |
| 138 | + }] |
| 139 | + }; |
| 140 | + resolve(objName).addListener(listenerMap[objName].listener); |
| 141 | + } |
| 142 | + } |
| 143 | + |
| 144 | + function removeListener(objName, portName, id) { |
| 145 | + if (listenerMap[objName]) { |
| 146 | + if (typeof id === 'undefined') { |
| 147 | + listenerMap[objName].receivers = listenerMap[objName].receivers.filter(function (receiver) { |
| 148 | + return receiver.portName !== portName; |
| 149 | + }); |
| 150 | + } else { |
| 151 | + listenerMap[objName].receivers.some(function (receiver, idx) { |
| 152 | + if (receiver.portName === portName && receiver.id === id) { |
| 153 | + listenerMap[objName].receivers.splice(idx, 1); |
| 154 | + return true; |
| 155 | + } |
| 156 | + }); |
| 157 | + } |
| 158 | + if (listenerMap[objName].receivers.length === 0) { |
| 159 | + resolve(objName).removeListener(listenerMap[objName].listener); |
| 160 | + delete listenerMap[objName]; |
| 161 | + } |
| 162 | + } |
| 163 | + } |
| 164 | + |
| 165 | + function cleanupListener(portName) { |
| 166 | + Object.keys(listenerMap).forEach(function (objName) { |
| 167 | + removeListener(objName, portName); |
| 168 | + }); |
| 169 | + } |
| 170 | + |
| 171 | + function normalize(method) { |
| 172 | + return (method.indexOf('window.') === 0) ? method.substring(7) : method; |
| 173 | + } |
| 174 | + |
| 175 | + function resolve(name) { |
| 176 | + var tmpName = ''; |
| 177 | + |
| 178 | + return (objCache[name]) || |
| 179 | + name.split('.').reduce(function (obj, prop) { |
| 180 | + tmpName += ((tmpName ? '.' : '') + prop); |
| 181 | + if (obj && obj[prop]) { |
| 182 | + objCache[tmpName] = obj[prop]; |
| 183 | + return obj[prop]; |
| 184 | + } else { |
| 185 | + return undef; |
| 186 | + } |
| 187 | + }, scope); |
| 188 | + } |
| 189 | + |
| 190 | +}(window)); |
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