eventHandlers.js

/* TAB EVENTS */
// For most tab events, we simply resave the entire window.
// While more wasteful, this makes the code much more robust.


function onTabAttached(tabId, info) {
  onTabChanged(tabId, info.newWindowId);
  // TODO: handle the case where this was the last tab of a saved window
}
chrome.tabs.onAttached.addListener(onTabAttached);


function onTabCreated(tab) {
  onTabChanged(tab.id, tab.windowId);
}
chrome.tabs.onCreated.addListener(onTabCreated);


function onTabDetached(tabId, info) {
  if (tabIdToSavedWindowId[tabId]) {
    delete tabIdToSavedWindowId[tabId];
  }
  onTabChanged(tabId, info.oldWindowId);
}
chrome.tabs.onDetached.addListener(onTabDetached);


function onTabMoved(tabId, info) {
  onTabChanged(tabId, info.windowId);
}
chrome.tabs.onMoved.addListener(onTabMoved);


function onTabRemoved(tabId, removeInfo) {
  var windowId = tabIdToSavedWindowId[tabId];
  delete tabIdToSavedWindowId[tabId];
  isWindowClosing[windowId] = removeInfo.isWindowClosing;
  onTabChanged(tabId, windowId);
}
chrome.tabs.onRemoved.addListener(onTabRemoved);


function onTabSelectionChanged(tabId, info) {
  var windowId = info.windowId;
  updateBadgeForTab({id: tabId, windowId: windowId});
  onTabChanged(tabId, windowId);
}
chrome.tabs.onSelectionChanged.addListener(onTabSelectionChanged);


function onTabUpdated(tabId, info, tab) {
  onTabChanged(tabId, tab.windowId);
}
chrome.tabs.onUpdated.addListener(onTabUpdated);


// updates a window in response to a tab event
function onTabChanged(tabId, windowId) {
  if (isWindowClosing[windowId])
    return;
  getPopulatedWindow(windowId, function(browserWindow) {
    // if the window is saved, we update it
    if (windowIdToName[windowId]) {
      tabIdToSavedWindowId[tabId] = windowId;
      var name = windowIdToName[windowId];
      var displayName = savedWindows[name].displayName;
      storeWindow(browserWindow, name, displayName);
    } else {
      // otherwise we double check that it's not saved
      for (i in closedWindows) {
        var savedWindow = closedWindows[i];
        if (windowsAreEqual(browserWindow, savedWindow)) {
          var name = savedWindow.name;
          var displayName = savedWindow.displayName;
          storeWindow(browserWindow, name, displayName);
          markWindowAsOpen(browserWindow);
        }
      }
    }
    if (tabId) {
      updateBadgeForTab({id:tabId, windowId:windowId});
    }
  });
}


// given a window id, fetches the corresponding window object
// and tabs, and calls callback with the window as argument
function getPopulatedWindow(windowId, callback) {
  if (!windowId) {return;}
  chrome.windows.get(windowId, function(browserWindow) {
    if (!browserWindow) {return;}
    chrome.tabs.getAllInWindow(windowId, function(tabs) {
      if (!tabs) {return;}
      browserWindow.tabs = tabs;
      callback(browserWindow);
    });
  });
}


/* WINDOW EVENTS */


function onWindowRemoved(windowId) {
  var windowName = windowIdToName[windowId];
  if (windowName) {
    var savedWindow = savedWindows[windowName];
    markWindowAsClosed(savedWindow);
  }
  delete isWindowClosing[windowId];
}
chrome.windows.onRemoved.addListener(onWindowRemoved);