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50 lines
1.6 KiB
50 lines
1.6 KiB
const LocalMessageDuplexStream = require('./lib/local-message-stream.js')
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const PortStream = require('./lib/port-stream.js')
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const ObjectMultiplex = require('./lib/obj-multiplex')
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// const urlUtil = require('url')
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if (shouldInjectWeb3()) {
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setupInjection()
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}
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function setupInjection(){
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// inject in-page script
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var scriptTag = document.createElement('script')
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scriptTag.src = chrome.extension.getURL('scripts/inpage.js')
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scriptTag.onload = function () { this.parentNode.removeChild(this) }
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var container = document.head || document.documentElement
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// append as first child
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container.insertBefore(scriptTag, container.children[0])
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// setup communication to page and plugin
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var pageStream = new LocalMessageDuplexStream({
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name: 'contentscript',
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target: 'inpage',
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})
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pageStream.on('error', console.error.bind(console))
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var pluginPort = chrome.runtime.connect({name: 'contentscript'})
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var pluginStream = new PortStream(pluginPort)
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pluginStream.on('error', console.error.bind(console))
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// forward communication plugin->inpage
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pageStream.pipe(pluginStream).pipe(pageStream)
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// connect contentscript->inpage reload stream
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var mx = ObjectMultiplex()
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mx.on('error', console.error.bind(console))
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mx.pipe(pageStream)
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var reloadStream = mx.createStream('reload')
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reloadStream.on('error', console.error.bind(console))
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// if we lose connection with the plugin, trigger tab refresh
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pluginStream.on('close', function () {
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reloadStream.write({ method: 'reset' })
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})
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}
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function shouldInjectWeb3(){
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var shouldInject = (window.location.href.indexOf('.pdf') === -1)
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return shouldInject
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} |