electron/atom/browser/lib/chrome-extension.coffee
2015-11-12 20:29:30 +08:00

96 lines
3.3 KiB
CoffeeScript

electron = require 'electron'
fs = require 'fs'
path = require 'path'
url = require 'url'
# Mapping between hostname and file path.
hostPathMap = {}
hostPathMapNextKey = 0
getHostForPath = (path) ->
key = "extension-#{++hostPathMapNextKey}"
hostPathMap[key] = path
key
getPathForHost = (host) ->
hostPathMap[host]
# Cache extensionInfo.
extensionInfoMap = {}
getExtensionInfoFromPath = (srcDirectory) ->
manifest = JSON.parse fs.readFileSync(path.join(srcDirectory, 'manifest.json'))
unless extensionInfoMap[manifest.name]?
# We can not use 'file://' directly because all resources in the extension
# will be treated as relative to the root in Chrome.
page = url.format
protocol: 'chrome-extension'
slashes: true
hostname: getHostForPath srcDirectory
pathname: manifest.devtools_page
extensionInfoMap[manifest.name] =
startPage: page
name: manifest.name
srcDirectory: srcDirectory
exposeExperimentalAPIs: true
extensionInfoMap[manifest.name]
# The loaded extensions cache and its persistent path.
loadedExtensions = null
loadedExtensionsPath = null
# Persistent loaded extensions.
{app} = electron
app.on 'will-quit', ->
try
loadedExtensions = Object.keys(extensionInfoMap).map (key) -> extensionInfoMap[key].srcDirectory
try
fs.mkdirSync path.dirname(loadedExtensionsPath)
catch e
fs.writeFileSync loadedExtensionsPath, JSON.stringify(loadedExtensions)
catch e
# We can not use protocol or BrowserWindow until app is ready.
app.once 'ready', ->
{protocol, BrowserWindow} = electron
# Load persistented extensions.
loadedExtensionsPath = path.join app.getPath('userData'), 'DevTools Extensions'
try
loadedExtensions = JSON.parse fs.readFileSync(loadedExtensionsPath)
loadedExtensions = [] unless Array.isArray loadedExtensions
# Preheat the extensionInfo cache.
getExtensionInfoFromPath srcDirectory for srcDirectory in loadedExtensions
catch e
# The chrome-extension: can map a extension URL request to real file path.
chromeExtensionHandler = (request, callback) ->
parsed = url.parse request.url
return callback() unless parsed.hostname and parsed.path?
return callback() unless /extension-\d+/.test parsed.hostname
directory = getPathForHost parsed.hostname
return callback() unless directory?
callback path.join(directory, parsed.path)
protocol.registerFileProtocol 'chrome-extension', chromeExtensionHandler, (error) ->
console.error 'Unable to register chrome-extension protocol' if error
BrowserWindow::_loadDevToolsExtensions = (extensionInfoArray) ->
@devToolsWebContents?.executeJavaScript "DevToolsAPI.addExtensions(#{JSON.stringify(extensionInfoArray)});"
BrowserWindow.addDevToolsExtension = (srcDirectory) ->
extensionInfo = getExtensionInfoFromPath srcDirectory
if extensionInfo
window._loadDevToolsExtensions [extensionInfo] for window in BrowserWindow.getAllWindows()
extensionInfo.name
BrowserWindow.removeDevToolsExtension = (name) ->
delete extensionInfoMap[name]
# Load persistented extensions when devtools is opened.
init = BrowserWindow::_init
BrowserWindow::_init = ->
init.call this
@on 'devtools-opened', ->
@_loadDevToolsExtensions Object.keys(extensionInfoMap).map (key) -> extensionInfoMap[key]