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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 (function() { |
| 6 var internal = mojo.internal; |
| 7 |
| 8 var AssociationEvent = { |
| 9 // The interface has been associated with a message pipe. |
| 10 ASSOCIATED: 'associated', |
| 11 // The peer of this object has been closed before association. |
| 12 PEER_CLOSED_BEFORE_ASSOCIATION: 'peer_closed_before_association' |
| 13 }; |
| 14 |
| 15 function State(interfaceId, associatedGroupController) { |
| 16 if (interfaceId === undefined) { |
| 17 interfaceId = internal.kInvalidInterfaceId; |
| 18 } |
| 19 |
| 20 this.interfaceId = interfaceId; |
| 21 this.associatedGroupController = associatedGroupController; |
| 22 this.pendingAssociation = false; |
| 23 this.disconnectReason = null; |
| 24 this.peerState_ = null; |
| 25 this.associationEventHandler_ = null; |
| 26 } |
| 27 |
| 28 State.prototype.initPendingState = function(peer) { |
| 29 this.pendingAssociation = true; |
| 30 this.peerState_ = peer; |
| 31 }; |
| 32 |
| 33 State.prototype.isValid = function() { |
| 34 return this.pendingAssociation || |
| 35 internal.isValidInterfaceId(this.interfaceId); |
| 36 }; |
| 37 |
| 38 State.prototype.close = function(disconnectReason) { |
| 39 var cachedGroupController; |
| 40 var cachedPeerState; |
| 41 var cachedId = internal.kInvalidInterfaceId; |
| 42 |
| 43 if (!this.pendingAssociation) { |
| 44 if (internal.isValidInterfaceId(this.interfaceId)) { |
| 45 cachedGroupController = this.associatedGroupController; |
| 46 this.associatedGroupController = null; |
| 47 cachedId = this.interfaceId; |
| 48 this.interfaceId = internal.kInvalidInterfaceId; |
| 49 } |
| 50 } else { |
| 51 this.pendingAssociation = false; |
| 52 cachedPeerState = this.peerState_; |
| 53 this.peerState_ = null; |
| 54 } |
| 55 |
| 56 if (cachedGroupController) { |
| 57 cachedGroupController.closeEndpointHandle(cachedId, |
| 58 disconnectReason); |
| 59 } else if (cachedPeerState) { |
| 60 cachedPeerState.onPeerClosedBeforeAssociation(disconnectReason); |
| 61 } |
| 62 }; |
| 63 |
| 64 State.prototype.runAssociationEventHandler = function(associationEvent) { |
| 65 if (this.associationEventHandler_) { |
| 66 var handler = this.associationEventHandler_; |
| 67 this.associationEventHandler_ = null; |
| 68 handler(associationEvent); |
| 69 } |
| 70 }; |
| 71 |
| 72 State.prototype.setAssociationEventHandler = function(handler) { |
| 73 if (!this.pendingAssociation && |
| 74 !internal.isValidInterfaceId(this.interfaceId)) { |
| 75 return; |
| 76 } |
| 77 |
| 78 if (!handler) { |
| 79 this.associationEventHandler_ = null; |
| 80 return; |
| 81 } |
| 82 |
| 83 this.associationEventHandler_ = handler; |
| 84 if (!this.pendingAssociation) { |
| 85 setTimeout(this.runAssociationEventHandler.bind(this, |
| 86 AssociationEvent.ASSOCIATED), 0); |
| 87 } else if (!this.peerState_) { |
| 88 setTimeout(this.runAssociationEventHandler.bind(this, |
| 89 AssociationEvent.PEER_CLOSED_BEFORE_ASSOCIATION), 0); |
| 90 } |
| 91 }; |
| 92 |
| 93 State.prototype.notifyAssociation = function(interfaceId, |
| 94 peerGroupController) { |
| 95 var cachedPeerState = this.peerState_; |
| 96 this.peerState_ = null; |
| 97 |
| 98 this.pendingAssociation = false; |
| 99 |
| 100 if (cachedPeerState) { |
| 101 cachedPeerState.onAssociated(interfaceId, peerGroupController); |
| 102 return true; |
| 103 } |
| 104 return false; |
| 105 }; |
| 106 |
| 107 State.prototype.onAssociated = function(interfaceId, |
| 108 associatedGroupController) { |
| 109 if (!this.pendingAssociation) { |
| 110 return; |
| 111 } |
| 112 |
| 113 this.pendingAssociation = false; |
| 114 this.peerState_ = null; |
| 115 this.interfaceId = interfaceId; |
| 116 this.associatedGroupController = associatedGroupController; |
| 117 this.runAssociationEventHandler(AssociationEvent.ASSOCIATED); |
| 118 }; |
| 119 |
| 120 State.prototype.onPeerClosedBeforeAssociation = function(disconnectReason) { |
| 121 if (!this.pendingAssociation) { |
| 122 return; |
| 123 } |
| 124 |
| 125 this.peerState_ = null; |
| 126 this.disconnectReason = disconnectReason; |
| 127 |
| 128 this.runAssociationEventHandler( |
| 129 AssociationEvent.PEER_CLOSED_BEFORE_ASSOCIATION); |
| 130 }; |
| 131 |
| 132 function createPairPendingAssociation() { |
| 133 var handle0 = new InterfaceEndpointHandle(); |
| 134 var handle1 = new InterfaceEndpointHandle(); |
| 135 handle0.state_.initPendingState(handle1.state_); |
| 136 handle1.state_.initPendingState(handle0.state_); |
| 137 return {handle0: handle0, handle1: handle1}; |
| 138 } |
| 139 |
| 140 function InterfaceEndpointHandle(interfaceId, associatedGroupController) { |
| 141 this.state_ = new State(interfaceId, associatedGroupController); |
| 142 } |
| 143 |
| 144 InterfaceEndpointHandle.prototype.isValid = function() { |
| 145 return this.state_.isValid(); |
| 146 }; |
| 147 |
| 148 InterfaceEndpointHandle.prototype.pendingAssociation = function() { |
| 149 return this.state_.pendingAssociation; |
| 150 }; |
| 151 |
| 152 InterfaceEndpointHandle.prototype.id = function() { |
| 153 return this.state_.interfaceId; |
| 154 }; |
| 155 |
| 156 InterfaceEndpointHandle.prototype.groupController = function() { |
| 157 return this.state_.associatedGroupController; |
| 158 }; |
| 159 |
| 160 InterfaceEndpointHandle.prototype.disconnectReason = function() { |
| 161 return this.state_.disconnectReason; |
| 162 }; |
| 163 |
| 164 InterfaceEndpointHandle.prototype.setAssociationEventHandler = function( |
| 165 handler) { |
| 166 this.state_.setAssociationEventHandler(handler); |
| 167 }; |
| 168 |
| 169 InterfaceEndpointHandle.prototype.notifyAssociation = function(interfaceId, |
| 170 peerGroupController) { |
| 171 return this.state_.notifyAssociation(interfaceId, peerGroupController); |
| 172 }; |
| 173 |
| 174 InterfaceEndpointHandle.prototype.reset = function(reason) { |
| 175 this.state_.close(reason); |
| 176 this.state_ = new State(); |
| 177 }; |
| 178 |
| 179 internal.AssociationEvent = AssociationEvent; |
| 180 internal.InterfaceEndpointHandle = InterfaceEndpointHandle; |
| 181 internal.createPairPendingAssociation = createPairPendingAssociation; |
| 182 })(); |
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