background.js

var WINDOW_ID = chrome.windows.WINDOW_ID_NONE, TAB_ID = -1, // 用於關視窗
DEFAULT_WINDOW_SIZE = {width: 768, height: 475};

function closeIfExist(){
  if(WINDOW_ID > 0){
    chrome.windows.remove(WINDOW_ID);
    WINDOW_ID = chrome.windows.WINDOW_ID_NONE;
  }
}

// 主功能 BEGIN
function popWindow(query, left, top){
  closeIfExist();
  chrome.storage.local.get(DEFAULT_WINDOW_SIZE, function(data){
    chrome.storage.sync.get({open_method: 'popup'}, function(sync_data){
      switch(sync_data.open_method){
        case 'popup':
          chrome.windows.create({
            url: 'index.html?q=' + query, type: 'popup',
            left: left, top: top,
            width: data.width, height: data.height
          }, function(win){
            WINDOW_ID = win.id;
          });
          break;
        case 'tab':
          var properties = {url: 'index.html?q=' + query, active: true};
          function createTab() {
            chrome.tabs.create(properties, function(tab){ TAB_ID = tab.id; });
          }
          if(TAB_ID > 0)
            chrome.tabs.update(TAB_ID, properties, function(tab) {
              if(chrome.runtime.lastError) createTab(); // 可能 tab 不存在
            });
          else createTab();
          break;
      }
    });
  });
}
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse){
  if(request.op == 'resize?') sendResponse(WINDOW_ID == sender.tab.windowId);
  else popWindow(request.q, request.x, request.y);
});

chrome.windows.onFocusChanged.addListener(function(windowId){
  chrome.storage.sync.get({close_method: 'auto'}, function(data){
    if(data.close_method == 'auto' && windowId > 0 && windowId != WINDOW_ID) closeIfExist();
  });
});
// 主功能 END

// 右鍵選單 BEGIN
chrome.contextMenus.create({
  id: 'tjdict_context_menu',
  title: '查詢 "%s"',
  contexts: ['selection']
});

chrome.contextMenus.onClicked.addListener(function(event){
  if(event.menuItemId == 'tjdict_context_menu'){
    chrome.storage.local.get(null, function(data) {
      popWindow(event.selectionText, data.x, data.y);
    });
  }
});
// 右鍵選單 END

// 擴充功能更新 BEGIN
chrome.runtime.onInstalled.addListener(function(details){
  if(details.reason == 'update'){
    var current_version = chrome.runtime.getManifest().version;
    chrome.notifications.create('notification_update',{
      type: 'list',
      title: '已更新至 ' + current_version,
      iconUrl: 'img/icon128.png',
      message: '',
      items: CHANGELOG,
      buttons: [{title: '更多資訊', iconUrl: 'img/more.png'}, {title: '不開心？請告訴我吧！', iconUrl: 'img/email.png'}]
    }, function(notificationId){});
  }
});

chrome.notifications.onButtonClicked.addListener(function(notificationId, buttonIndex){
  if(notificationId == 'notification_update')
    if(buttonIndex == 0)
      chrome.tabs.create({url: 'https://github.com/tonytonyjan/TJDict/blob/master/CHANGELOG.md'});
    else
      chrome.tabs.create({url: 'https://chrome.google.com/webstore/support/caafmojgjlbflohillejdmnghkpcjjpp'});
});
// 擴充功能更新 END

// Browser Action BEGIN
chrome.browserAction.onClicked.addListener(function(tab){
  chrome.tabs.create({url: 'index.html'});
});
// Browser Action END