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adds IPFS to page only when option is set
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,31 +1,26 @@ | ||
| 'use strict' | ||
| /* eslint-env browser, webextensions */ | ||
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| const browser = require('webextension-polyfill') | ||
| const once = require('./once') | ||
| const injectScript = require('./inject-script') | ||
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| const port = browser.runtime.connect({ name: 'ipfs-proxy' }) | ||
| window.ipfsCompanion = window.ipfsCompanion || {} | ||
| window.ipfsCompanion.once = window.ipfsCompanion.once || {} | ||
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| // Forward on messages from background to the page and vice versa | ||
| port.onMessage.addListener((data) => window.postMessage(data, '*')) | ||
| // Only run this once for this window! | ||
| // URL can change (history API) which causes this script to be executed again, | ||
| // but it only needs to be setup once per window... | ||
| once('ipfsProxyContentScriptExecuted', () => { | ||
| const port = browser.runtime.connect({ name: 'ipfs-proxy' }) | ||
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| window.addEventListener('message', (msg) => { | ||
| if (msg.data && msg.data.sender === 'postmsg-rpc/client') { | ||
| port.postMessage(msg.data) | ||
| } | ||
| }) | ||
| // Forward on messages from background to the page and vice versa | ||
| port.onMessage.addListener((data) => window.postMessage(data, '*')) | ||
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| function injectPageScript () { | ||
| try { | ||
| const scriptTag = document.createElement('script') | ||
| scriptTag.src = browser.extension.getURL('dist/contentScripts/ipfs-proxy/page.js') | ||
| scriptTag.onload = function () { | ||
| this.parentNode.removeChild(this) | ||
| window.addEventListener('message', (msg) => { | ||
| if (msg.data && msg.data.sender === 'postmsg-rpc/client') { | ||
| port.postMessage(msg.data) | ||
| } | ||
| const container = document.head || document.documentElement | ||
| container.insertBefore(scriptTag, container.children[0]) | ||
| } catch (err) { | ||
| console.error('Failed to inject ipfs-proxy/page.js', err) | ||
| } | ||
| } | ||
| }) | ||
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| injectPageScript() | ||
| injectScript(browser.extension.getURL('dist/contentScripts/ipfs-proxy/page.js')) | ||
| }, { store: window.ipfsCompanion.once })() |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| function injectScript (src, target, opts) { | ||
| opts = opts || {} | ||
| const doc = opts.document || document | ||
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| const scriptTag = doc.createElement('script') | ||
| scriptTag.src = src | ||
| scriptTag.onload = function () { | ||
| this.parentNode.removeChild(this) | ||
| } | ||
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| target = doc.head || doc.documentElement | ||
| target.appendChild(scriptTag) | ||
| } | ||
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| module.exports = injectScript |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| const store = {} | ||
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| // call a function only once and store it's return value | ||
| function once (id, func, opts) { | ||
| opts = opts || {} | ||
| opts.store = opts.store || store | ||
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| if (Object.keys(opts.store).includes(id)) { | ||
| return () => opts.store[id] | ||
| } | ||
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| return function () { | ||
| opts.store[id] = func.apply(null, arguments) | ||
| return opts.store[id] | ||
| } | ||
| } | ||
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| module.exports = once |
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