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Diffstat (limited to 'ext/mixed/js/comm.js')
-rw-r--r-- | ext/mixed/js/comm.js | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/ext/mixed/js/comm.js b/ext/mixed/js/comm.js deleted file mode 100644 index 997249c8..00000000 --- a/ext/mixed/js/comm.js +++ /dev/null @@ -1,321 +0,0 @@ -/* - * Copyright (C) 2020-2021 Yomichan Authors - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. - */ - -class CrossFrameAPIPort extends EventDispatcher { - constructor(otherTabId, otherFrameId, port, messageHandlers) { - super(); - this._otherTabId = otherTabId; - this._otherFrameId = otherFrameId; - this._port = port; - this._messageHandlers = messageHandlers; - this._activeInvocations = new Map(); - this._invocationId = 0; - this._eventListeners = new EventListenerCollection(); - } - - get otherTabId() { - return this._otherTabId; - } - - get otherFrameId() { - return this._otherFrameId; - } - - prepare() { - this._eventListeners.addListener(this._port.onDisconnect, this._onDisconnect.bind(this)); - this._eventListeners.addListener(this._port.onMessage, this._onMessage.bind(this)); - } - - invoke(action, params, ackTimeout, responseTimeout) { - return new Promise((resolve, reject) => { - if (this._port === null) { - reject(new Error(`Port is disconnected (${action})`)); - return; - } - - const id = this._invocationId++; - const invocation = { - id, - resolve, - reject, - responseTimeout, - action, - ack: false, - timer: null - }; - this._activeInvocations.set(id, invocation); - - if (ackTimeout !== null) { - try { - invocation.timer = setTimeout(() => this._onError(id, 'Acknowledgement timeout'), ackTimeout); - } catch (e) { - this._onError(id, 'Failed to set timeout'); - return; - } - } - - try { - this._port.postMessage({type: 'invoke', id, data: {action, params}}); - } catch (e) { - this._onError(id, e); - } - }); - } - - disconnect() { - this._onDisconnect(); - } - - // Private - - _onDisconnect() { - if (this._port === null) { return; } - this._eventListeners.removeAllEventListeners(); - this._port = null; - for (const id of this._activeInvocations.keys()) { - this._onError(id, 'Disconnected'); - } - this.trigger('disconnect', this); - } - - _onMessage({type, id, data}) { - switch (type) { - case 'invoke': - this._onInvoke(id, data); - break; - case 'ack': - this._onAck(id); - break; - case 'result': - this._onResult(id, data); - break; - } - } - - // Response handlers - - _onAck(id) { - const invocation = this._activeInvocations.get(id); - if (typeof invocation === 'undefined') { - yomichan.logWarning(new Error(`Request ${id} not found for acknowledgement`)); - return; - } - - if (invocation.ack) { - this._onError(id, `Request ${id} already acknowledged`); - return; - } - - invocation.ack = true; - - if (invocation.timer !== null) { - clearTimeout(invocation.timer); - invocation.timer = null; - } - - const responseTimeout = invocation.responseTimeout; - if (responseTimeout !== null) { - try { - invocation.timer = setTimeout(() => this._onError(id, 'Response timeout'), responseTimeout); - } catch (e) { - this._onError(id, 'Failed to set timeout'); - } - } - } - - _onResult(id, data) { - const invocation = this._activeInvocations.get(id); - if (typeof invocation === 'undefined') { - yomichan.logWarning(new Error(`Request ${id} not found`)); - return; - } - - if (!invocation.ack) { - this._onError(id, `Request ${id} not acknowledged`); - return; - } - - this._activeInvocations.delete(id); - - if (invocation.timer !== null) { - clearTimeout(invocation.timer); - invocation.timer = null; - } - - const error = data.error; - if (typeof error !== 'undefined') { - invocation.reject(deserializeError(error)); - } else { - invocation.resolve(data.result); - } - } - - _onError(id, error) { - const invocation = this._activeInvocations.get(id); - if (typeof invocation === 'undefined') { return; } - - if (typeof error === 'string') { - error = new Error(`${error} (${invocation.action})`); - } - - this._activeInvocations.delete(id); - if (invocation.timer !== null) { - clearTimeout(invocation.timer); - invocation.timer = null; - } - invocation.reject(error); - } - - // Invocation - - _onInvoke(id, {action, params}) { - const messageHandler = this._messageHandlers.get(action); - this._sendAck(id); - if (typeof messageHandler === 'undefined') { - this._sendError(id, new Error(`Unknown action: ${action}`)); - return false; - } - - const callback = (data) => this._sendResult(id, data); - return yomichan.invokeMessageHandler(messageHandler, params, callback); - } - - _sendResponse(data) { - if (this._port === null) { return; } - try { - this._port.postMessage(data); - } catch (e) { - // NOP - } - } - - _sendAck(id) { - this._sendResponse({type: 'ack', id}); - } - - _sendResult(id, data) { - this._sendResponse({type: 'result', id, data}); - } - - _sendError(id, error) { - this._sendResponse({type: 'result', id, data: {error: serializeError(error)}}); - } -} - -class CrossFrameAPI { - constructor() { - this._ackTimeout = 3000; // 3 seconds - this._responseTimeout = 10000; // 10 seconds - this._commPorts = new Map(); - this._messageHandlers = new Map(); - this._onDisconnectBind = this._onDisconnect.bind(this); - } - - prepare() { - chrome.runtime.onConnect.addListener(this._onConnect.bind(this)); - } - - invoke(targetFrameId, action, params={}) { - return this.invokeTab(null, targetFrameId, action, params); - } - - async invokeTab(targetTabId, targetFrameId, action, params={}) { - if (typeof targetTabId !== 'number') { targetTabId = null; } - const commPort = this._getOrCreateCommPort(targetTabId, targetFrameId); - return await commPort.invoke(action, params, this._ackTimeout, this._responseTimeout); - } - - registerHandlers(messageHandlers) { - for (const [key, value] of messageHandlers) { - if (this._messageHandlers.has(key)) { - throw new Error(`Handler ${key} is already registered`); - } - this._messageHandlers.set(key, value); - } - } - - unregisterHandler(key) { - return this._messageHandlers.delete(key); - } - - // Private - - _onConnect(port) { - try { - let details; - try { - details = JSON.parse(port.name); - } catch (e) { - return; - } - if (details.name !== 'cross-frame-communication-port') { return; } - - const otherTabId = details.sourceTabId; - const otherFrameId = details.sourceFrameId; - this._setupCommPort(otherTabId, otherFrameId, port); - } catch (e) { - port.disconnect(); - yomichan.logError(e); - } - } - - _onDisconnect(commPort) { - commPort.off('disconnect', this._onDisconnectBind); - const {otherTabId, otherFrameId} = commPort; - const tabPorts = this._commPorts.get(otherTabId); - if (typeof tabPorts !== 'undefined') { - tabPorts.delete(otherFrameId); - if (tabPorts.size === 0) { - this._commPorts.delete(otherTabId); - } - } - } - - _getOrCreateCommPort(otherTabId, otherFrameId) { - const tabPorts = this._commPorts.get(otherTabId); - if (typeof tabPorts !== 'undefined') { - const commPort = tabPorts.get(otherFrameId); - if (typeof commPort !== 'undefined') { - return commPort; - } - } - return this._createCommPort(otherTabId, otherFrameId); - } - - _createCommPort(otherTabId, otherFrameId) { - const details = { - name: 'background-cross-frame-communication-port', - targetTabId: otherTabId, - targetFrameId: otherFrameId - }; - const port = yomichan.connect(null, {name: JSON.stringify(details)}); - return this._setupCommPort(otherTabId, otherFrameId, port); - } - - _setupCommPort(otherTabId, otherFrameId, port) { - const commPort = new CrossFrameAPIPort(otherTabId, otherFrameId, port, this._messageHandlers); - let tabPorts = this._commPorts.get(otherTabId); - if (typeof tabPorts === 'undefined') { - tabPorts = new Map(); - this._commPorts.set(otherTabId, tabPorts); - } - tabPorts.set(otherFrameId, commPort); - commPort.prepare(); - commPort.on('disconnect', this._onDisconnectBind); - return commPort; - } -} |