diff options
Diffstat (limited to 'src/js/vapi-client.js')
| -rw-r--r-- | src/js/vapi-client.js | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/src/js/vapi-client.js b/src/js/vapi-client.js new file mode 100644 index 0000000..76058e1 --- /dev/null +++ b/src/js/vapi-client.js @@ -0,0 +1,335 @@ +// for non background pages +/* global chrome, Components, safari */ + +(function() { +'use strict'; + +window.vAPI = window.vAPI || {}; + +// since this is common across vendors +var messagingConnector = function(response) { + var channel, listener; + + if (!response) { + return; + } + + if (response.broadcast === true) { + for (channel in vAPI.messaging.channels) { + listener = vAPI.messaging.channels[channel].listener; + + if (typeof listener === 'function') { + listener(response.msg); + } + } + + return; + } + + if (response.requestId) { + listener = vAPI.messaging.listeners[response.requestId]; + + if (!listener) { + channel = vAPI.messaging.channels[response.portName]; + listener = channel && channel.listener; + } + } + + if (typeof listener === 'function') { + delete vAPI.messaging.listeners[response.requestId]; + delete response.requestId; + listener(response.msg); + } +}; + +if (window.chrome) { + vAPI.messaging = { + port: null, + requestId: 0, + listenerId: null, + listeners: {}, + channels: {}, + connector: messagingConnector, + setup: function() { + this.listenerId = 'uBlock:' + name + ':' + parseInt(Math.random() * 1e10, 10).toString(36); + this.port = chrome.runtime.connect({name: this.listenerId}); + this.port.onMessage.addListener(this.connector); + }, + close: function() { + if (this.port) { + this.port.disconnect(); + this.port.onMessage.removeListener(this.connector); + this.channels = this.listeners = this.port = this.listenerId = null; + } + }, + channel: function(name, callback) { + if (!name) { + return; + } + + if (!this.listenerId) { + this.setup(); + } + + this.channels[name] = { + portName: name, + listener: typeof callback === 'function' ? callback : null, + send: function(message, callback) { + message = { + portName: this.portName, + msg: message + }; + + if (callback) { + message.requestId = ++vAPI.messaging.requestId; + vAPI.messaging.listeners[message.requestId] = callback; + } + + vAPI.messaging.port.postMessage(message); + }, + close: function() { + delete vAPI.messaging.channels[this.portName]; + } + }; + + return this.channels[name]; + } + }; +} else if (window.safari) { + var linkHelper = document.createElement('a'); + var onBeforeLoad = function(e, details) { + if (e.url && e.url.slice(0, 5) === 'data:') { + return; + } + + linkHelper.href = details ? details.url : e.url; + + if (!/^https?:/.test(linkHelper.protocol)) { + return; + } + + if (details) { + details.url = linkHelper.href; + details.type = 'xmlhttprequest'; + } + else { + details = { + url: linkHelper.href + }; + + switch (e.target.nodeName.toLowerCase()) { + case 'frame': + case 'iframe': + details.type = 'sub_frame'; + break; + case 'script': + details.type = 'script'; + break; + case 'img': + case 'input': // type=image + details.type = 'image'; + break; + case 'object': + case 'embed': + details.type = 'object'; + break; + case 'link': + var rel = e.target.rel.trim().toLowerCase(); + + if (rel.indexOf('icon') > -1) { + details.type = 'image'; + break; + } + else if (rel === 'stylesheet') { + details.type = 'stylesheet'; + break; + } + default: + details.type = 'other'; + } + } + + // tabId is determined in the background script + // details.tabId = null; + details.frameId = 0; + details.parentFrameId = window === window.top ? -1 : 0; + details.timeStamp = Date.now(); + + var response = safari.self.tab.canLoad(e, details); + + if (!response) { + e.preventDefault(); + return false; + } + // local mirroring, response is a data: URL here + else if (typeof response === 'string') { + if (details.type === 'script') { + e.preventDefault(); + return response; + } + else if (details.type === 'script') { + e.preventDefault(); + details = document.createElement('script'); + details.textContent = atob(response.slice(35)); + e.target.parentNode.insertBefore(details, e.target); + details.parentNode.removeChild(details); + } + } + }; + + // intercepting xhr requests + setTimeout(function() { + if (location.protocol === "safari-extension:") { + return; + } + + var randomEventName = parseInt(Math.random() * 1e15, 10).toString(36); + var beforeLoadEvent = document.createEvent('Event'); + beforeLoadEvent.initEvent('beforeload'); + + window.addEventListener(randomEventName, function(e) { + var result = onBeforeLoad(beforeLoadEvent, e.detail); + + if (onBeforeLoad(beforeLoadEvent, e.detail) === false) { + e.detail.url = false; + } + else if (typeof result === 'string') { + e.detail.url = result; + } + }, true); + + // since the extension context is unable to reach the page context + var tempScript = document.createElement('script'); + tempScript.onload = function() { + this.parentNode.removeChild(this); + }; + document.head.appendChild(tempScript).src = "data:application/x-javascript;base64," + btoa(["(function() {", + "var xhr_open = XMLHttpRequest.prototype.open;", + + "XMLHttpRequest.prototype.open = function(method, url, async, u, p) {", + "var ev = document.createEvent('CustomEvent');", + "var detail = {url: url};", + "ev.initCustomEvent(", + "'" + randomEventName + "',", + "false, false,", + "detail", + ");", + "window.dispatchEvent(ev);", + "if (detail.url === false) {", + "throw Error;", + "}", + "else if (typeof detail.url === 'string') {", + "url = detail.url;", + "}", + "return xhr_open.call(this, method, url, async, u, p);", + "};", + "})();"].join('')); + }, 0); + + document.addEventListener('beforeload', onBeforeLoad, true); + + // relevant? + // https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/MessagesandProxies/MessagesandProxies.html#//apple_ref/doc/uid/TP40009977-CH14-SW12 + vAPI.messaging = { + port: null, + requestId: 0, + listeners: {}, + channels: {}, + connector: messagingConnector, + setup: function() { + this._connector = function(msg) { + vAPI.messaging.connector(msg.message); + }; + safari.self.addEventListener('message', this._connector, false); + }, + close: function() { + if (this._connector) { + safari.self.removeEventListener('message', this._connector, false); + } + }, + channel: function(name, callback) { + if (!name) { + return; + } + + if (!this._connector) { + this.setup(); + } + + this.channels[name] = { + portName: name, + listener: typeof callback === 'function' ? callback : null, + send: function(message, callback) { + message = { + portName: this.portName, + msg: message + }; + + if (callback) { + message.requestId = ++vAPI.messaging.requestId; + vAPI.messaging.listeners[message.requestId] = callback; + } + + if (safari.extension.globalPage) { + // popover content doesn't know messaging... + safari.extension.globalPage.contentWindow + .vAPI.messaging.connector({ + name: 'message', + message: message, + target: { + page: { + dispatchMessage: function(name, msg) { + vAPI.messaging.connector(msg); + } + } + } + }); + } + else { + safari.self.tab.dispatchMessage('message', message); + } + }, + close: function() { + delete vAPI.messaging.channels[this.portName]; + } + }; + + return this.channels[name]; + } + }; + + var onContextMenu = function(e) { + var details = { + tagName: e.target.tagName.toLowerCase(), + pageUrl: window.location.href, + insideFrame: window.top !== window + }; + + details.editable = details.tagName === 'textarea' || details.tagName === 'input'; + + if ('checked' in e.target) { + details.checked = e.target.checked; + } + + if (details.tagName === 'a') { + details.linkUrl = e.target.href; + } + + if ('src' in e.target) { + details.srcUrl = e.target.src; + + if (details.tagName === 'img') { + details.mediaType = 'image'; + } + else if (details.tagName === 'video' || details.tagName === 'audio') { + details.mediaType = details.tagName; + } + } + + safari.self.tab.setContextMenuEventUserInfo(e, details); + }; + + window.addEventListener('contextmenu', onContextMenu, true); +} + +})(); |