scrollbar-anywhere/src/background.js at fa692a78371b11dd0b2b065c4d69bba937fc4fdc · davidparsson/scrollbar-anywhere · GitHub

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defaultOptions = { "button":    2,
                   "key_shift": false,
                   "key_ctrl":  false,
                   "key_alt":   false,
                   "key_meta":  false,
                   "scaling":   1,
                   "speed":     6000,
                   "friction":  10,
                   "cursor":    true,
                   "notext":    false,
                   "nolinks":   false,
                   "nobuttons": false,
                   "nolabels":  false,
                   "noimages":  false,
                   "noembeds":  false,
                   "grab_and_drag": false,
                   "debug":     false,
                   "blacklist": "",
                   "browser_enabled": true,
                 }

for (var k in defaultOptions)
  if (typeof localStorage[k] == 'undefined')
    localStorage[k] = defaultOptions[k]


function loadOptions() {
  var o = {}
  for (var k in defaultOptions) o[k] = localStorage[k]
  return o
}

clients = {}

chrome.extension.onConnect.addListener(function(port) {
  port.postMessage({ saveOptions: localStorage })
  var id = port.sender.tab.id + ":" + port.sender.frameId
  console.log("connect: "+id)
  clients[id] = port
  port.onDisconnect.addListener(function() {
    console.log("disconnect: "+id)
    delete clients[id]
  })
})

function saveOptions(o) {
  for (var k in o) {
    localStorage[k] = o[k]
  }

  for (var id in clients) {
    clients[id].postMessage({ saveOptions: localStorage })
  }
}

chrome.browserAction.onClicked.addListener(function(tab) {
  if (localStorage['browser_enabled'] == "true") {
    localStorage['browser_enabled'] = "false"
    chrome.browserAction.setIcon({path:"icon16dis.png"})
  }
  else {
    localStorage['browser_enabled'] = "true"
    chrome.browserAction.setIcon({path:"icon16.png"})
  }
  saveOptions({o:'browser_enabled'})
})

// Inject content script into all existing tabs (doesn't work)
// This functionality requires
//  "permissions": ["tabs"]
// in manifest.json
/*
chrome.windows.getAll({populate:true}, function(wins) {
  wins.forEach(function(win) {
    win.tabs.forEach(function(tab) {
      chrome.tabs.executeScript(tab.id,{file:"content.js",allFrames:true});
    })
  })
})
*/