183 lines
5.5 KiB
JavaScript
183 lines
5.5 KiB
JavaScript
const {app, protocol, webContents, BrowserWindow} = require('electron')
|
|
const fs = require('fs')
|
|
const path = require('path')
|
|
const url = require('url')
|
|
|
|
// TODO(zcbenz): Remove this when we have Object.values().
|
|
const objectValues = function (object) {
|
|
return Object.keys(object).map(function (key) { return object[key] })
|
|
}
|
|
|
|
// Mapping between hostname and file path.
|
|
const hostPathMap = {}
|
|
let hostPathMapNextKey = 0
|
|
|
|
const generateHostForPath = function (path) {
|
|
const key = `extension-${++hostPathMapNextKey}`
|
|
hostPathMap[key] = path
|
|
return key
|
|
}
|
|
|
|
const getPathForHost = function (host) {
|
|
return hostPathMap[host]
|
|
}
|
|
|
|
// Cache manifests.
|
|
const manifestMap = {}
|
|
|
|
const getManifestFromPath = function (srcDirectory) {
|
|
const manifest = JSON.parse(fs.readFileSync(path.join(srcDirectory, 'manifest.json')))
|
|
if (!manifestMap[manifest.name]) {
|
|
const hostname = generateHostForPath(srcDirectory)
|
|
manifestMap[manifest.name] = manifest
|
|
Object.assign(manifest, {
|
|
srcDirectory: srcDirectory,
|
|
hostname: hostname,
|
|
// We can not use 'file://' directly because all resources in the extension
|
|
// will be treated as relative to the root in Chrome.
|
|
startPage: url.format({
|
|
protocol: 'chrome-extension',
|
|
slashes: true,
|
|
hostname: hostname,
|
|
pathname: manifest.devtools_page
|
|
})
|
|
})
|
|
return manifest
|
|
}
|
|
}
|
|
|
|
// Manage the background pages.
|
|
const backgroundPages = {}
|
|
|
|
const startBackgroundPages = function (manifest) {
|
|
if (backgroundPages[manifest.hostname] || !manifest.background) return
|
|
|
|
const scripts = manifest.background.scripts.map((name) => {
|
|
return `<script src="${name}"></script>`
|
|
}).join('')
|
|
const html = new Buffer(`<html><body>${scripts}</body></html>`)
|
|
|
|
const contents = webContents.create({})
|
|
backgroundPages[manifest.hostname] = { html: html, contents: contents }
|
|
contents.loadURL(url.format({
|
|
protocol: 'chrome-extension',
|
|
slashes: true,
|
|
hostname: manifest.hostname,
|
|
pathname: '_generated_background_page.html'
|
|
}))
|
|
}
|
|
|
|
// Transfer the |manifest| to a format that can be recognized by the
|
|
// |DevToolsAPI.addExtensions|.
|
|
const manifestToExtensionInfo = function (manifest) {
|
|
return {
|
|
startPage: manifest.startPage,
|
|
srcDirectory: manifest.srcDirectory,
|
|
name: manifest.name,
|
|
exposeExperimentalAPIs: true
|
|
}
|
|
}
|
|
|
|
// Load the extensions for the window.
|
|
const loadDevToolsExtensions = function (win, manifests) {
|
|
if (!win.devToolsWebContents) return
|
|
|
|
for (const manifest of manifests) {
|
|
startBackgroundPages(manifest)
|
|
}
|
|
const extensionInfoArray = manifests.map(manifestToExtensionInfo)
|
|
win.devToolsWebContents.executeJavaScript(`DevToolsAPI.addExtensions(${JSON.stringify(extensionInfoArray)})`)
|
|
}
|
|
|
|
// The persistent path of "DevTools Extensions" preference file.
|
|
let loadedExtensionsPath = null
|
|
|
|
app.on('will-quit', function () {
|
|
try {
|
|
const loadedExtensions = objectValues(manifestMap).map(function (manifest) {
|
|
return manifest.srcDirectory
|
|
})
|
|
if (loadedExtensions.length > 0) {
|
|
try {
|
|
fs.mkdirSync(path.dirname(loadedExtensionsPath))
|
|
} catch (error) {
|
|
// Ignore error
|
|
}
|
|
fs.writeFileSync(loadedExtensionsPath, JSON.stringify(loadedExtensions))
|
|
} else {
|
|
fs.unlinkSync(loadedExtensionsPath)
|
|
}
|
|
} catch (error) {
|
|
// Ignore error
|
|
}
|
|
})
|
|
|
|
// We can not use protocol or BrowserWindow until app is ready.
|
|
app.once('ready', function () {
|
|
// Load persisted extensions.
|
|
loadedExtensionsPath = path.join(app.getPath('userData'), 'DevTools Extensions')
|
|
try {
|
|
const loadedExtensions = JSON.parse(fs.readFileSync(loadedExtensionsPath))
|
|
if (Array.isArray(loadedExtensions)) {
|
|
// Preheat the manifest cache.
|
|
for (const srcDirectory of loadedExtensions) {
|
|
getManifestFromPath(srcDirectory)
|
|
}
|
|
}
|
|
} catch (error) {
|
|
// Ignore error
|
|
}
|
|
|
|
// The chrome-extension: can map a extension URL request to real file path.
|
|
const chromeExtensionHandler = function (request, callback) {
|
|
const parsed = url.parse(request.url)
|
|
if (!parsed.hostname || !parsed.path) return callback()
|
|
if (!/extension-\d+/.test(parsed.hostname)) return callback()
|
|
|
|
const directory = getPathForHost(parsed.hostname)
|
|
if (!directory) return callback()
|
|
|
|
if (parsed.path === '/_generated_background_page.html' &&
|
|
backgroundPages[parsed.hostname]) {
|
|
return callback({
|
|
mimeType: 'text/html',
|
|
data: backgroundPages[parsed.hostname].html
|
|
})
|
|
}
|
|
|
|
fs.readFile(path.join(directory, parsed.path), function (err, content) {
|
|
if (err) {
|
|
return callback(-6) // FILE_NOT_FOUND
|
|
} else {
|
|
return callback({mimeType: 'text/html', data: content})
|
|
}
|
|
})
|
|
}
|
|
protocol.registerBufferProtocol('chrome-extension', chromeExtensionHandler, function (error) {
|
|
if (error) {
|
|
console.error(`Unable to register chrome-extension protocol: ${error}`)
|
|
}
|
|
})
|
|
|
|
BrowserWindow.addDevToolsExtension = function (srcDirectory) {
|
|
const manifest = getManifestFromPath(srcDirectory)
|
|
if (manifest) {
|
|
for (const win of BrowserWindow.getAllWindows()) {
|
|
loadDevToolsExtensions(win, [manifest])
|
|
}
|
|
return manifest.name
|
|
}
|
|
}
|
|
BrowserWindow.removeDevToolsExtension = function (name) {
|
|
delete manifestMap[name]
|
|
}
|
|
|
|
// Load persisted extensions when devtools is opened.
|
|
const init = BrowserWindow.prototype._init
|
|
BrowserWindow.prototype._init = function () {
|
|
init.call(this)
|
|
this.webContents.on('devtools-opened', () => {
|
|
loadDevToolsExtensions(this, objectValues(manifestMap))
|
|
})
|
|
}
|
|
})
|