Move bindings javascript into its own directory.

chrome/renderer/resources/event_bindings.js

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-var chrome = chrome || {};
-(function () {
-  native function GetChromeHidden();
-  native function AttachEvent(eventName);
-  native function DetachEvent(eventName);
-  native function GetExternalFileEntry(fileDefinition);
-  native function Print();
-
-  var chromeHidden = GetChromeHidden();
-
-  // Local implementation of JSON.parse & JSON.stringify that protect us
-  // from being clobbered by an extension.
-  chromeHidden.JSON = new (function() {
-    var $Object = Object;
-    var $Array = Array;
-    var $jsonStringify = JSON.stringify;
-    var $jsonParse = JSON.parse;
-
-    this.stringify = function(thing) {
-      var customizedObjectToJSON = $Object.prototype.toJSON;
-      var customizedArrayToJSON = $Array.prototype.toJSON;
-      if (customizedObjectToJSON !== undefined) {
-        $Object.prototype.toJSON = null;
-      }
-      if (customizedArrayToJSON !== undefined) {
-        $Array.prototype.toJSON = null;
-      }
-      try {
-        return $jsonStringify(thing);
-      } finally {
-        if (customizedObjectToJSON !== undefined) {
-          $Object.prototype.toJSON = customizedObjectToJSON;
-        }
-        if (customizedArrayToJSON !== undefined) {
-          $Array.prototype.toJSON = customizedArrayToJSON;
-        }
-      }
-    };
-
-    this.parse = function(thing) {
-      return $jsonParse(thing);
-    };
-  })();
-
-  // Event object.  If opt_eventName is provided, this object represents
-  // the unique instance of that named event, and dispatching an event
-  // with that name will route through this object's listeners.
-  //
-  // Example:
-  //   chrome.tabs.onChanged = new chrome.Event("tab-changed");
-  //   chrome.tabs.onChanged.addListener(function(data) { alert(data); });
-  //   chromeHidden.Event.dispatch("tab-changed", "hi");
-  // will result in an alert dialog that says 'hi'.
-  chrome.Event = function(opt_eventName, opt_argSchemas) {
-    this.eventName_ = opt_eventName;
-    this.listeners_ = [];
-
-    // Validate event parameters if we are in debug.
-    if (opt_argSchemas &&
-        chromeHidden.validateCallbacks &&
-        chromeHidden.validate) {
-
-      this.validate_ = function(args) {
-        try {
-          chromeHidden.validate(args, opt_argSchemas);
-        } catch (exception) {
-          return "Event validation error during " + opt_eventName + " -- " +
-                 exception;
-        }
-      };
-    }
-  };
-
-  // A map of event names to the event object that is registered to that name.
-  var attachedNamedEvents = {};
-
-  // An array of all attached event objects, used for detaching on unload.
-  var allAttachedEvents = [];
-
-  chromeHidden.Event = {};
-
-  // Dispatches a named event with the given JSON array, which is deserialized
-  // before dispatch. The JSON array is the list of arguments that will be
-  // sent with the event callback.
-  chromeHidden.Event.dispatchJSON = function(name, args) {
-    if (attachedNamedEvents[name]) {
-      if (args) {
-        args = chromeHidden.JSON.parse(args);
-        // TODO(zelidrag|aa): Remove this hack from here once we enable event
-        // JSON payload unpacking on C++ side.
-        if (name == "fileBrowserHandler.onExecute") {
-          if (args.length < 2)
-            return;
-          var fileList = args[1].entries;
-          if (!fileList)
-            return;
-          // The second parameter for this event's payload is file definition
-          // dictionary that we used to reconstruct File API's Entry instance
-          // here.
-          for (var i = 0; i < fileList.length; i++)
-            fileList[i] = GetExternalFileEntry(fileList[i]);
-        }
-      }
-      return attachedNamedEvents[name].dispatch.apply(
-          attachedNamedEvents[name], args);
-    }
-  };
-
-  // Dispatches a named event with the given arguments, supplied as an array.
-  chromeHidden.Event.dispatch = function(name, args) {
-    if (attachedNamedEvents[name]) {
-      attachedNamedEvents[name].dispatch.apply(
-          attachedNamedEvents[name], args);
-    }
-  };
-
-  // Test if a named event has any listeners.
-  chromeHidden.Event.hasListener = function(name) {
-    return (attachedNamedEvents[name] &&
-            attachedNamedEvents[name].listeners_.length > 0);
-  };
-
-  // Registers a callback to be called when this event is dispatched.
-  chrome.Event.prototype.addListener = function(cb) {
-    if (this.listeners_.length == 0) {
-      this.attach_();
-    }
-    this.listeners_.push(cb);
-  };
-
-  // Unregisters a callback.
-  chrome.Event.prototype.removeListener = function(cb) {
-    var idx = this.findListener_(cb);
-    if (idx == -1) {
-      return;
-    }
-
-    this.listeners_.splice(idx, 1);
-    if (this.listeners_.length == 0) {
-      this.detach_();
-    }
-  };
-
-  // Test if the given callback is registered for this event.
-  chrome.Event.prototype.hasListener = function(cb) {
-    return this.findListener_(cb) > -1;
-  };
-
-  // Test if any callbacks are registered for this event.
-  chrome.Event.prototype.hasListeners = function(cb) {
-    return this.listeners_.length > 0;
-  };
-
-  // Returns the index of the given callback if registered, or -1 if not
-  // found.
-  chrome.Event.prototype.findListener_ = function(cb) {
-    for (var i = 0; i < this.listeners_.length; i++) {
-      if (this.listeners_[i] == cb) {
-        return i;
-      }
-    }
-
-    return -1;
-  };
-
-  // Dispatches this event object to all listeners, passing all supplied
-  // arguments to this function each listener.
-  chrome.Event.prototype.dispatch = function(varargs) {
-    var args = Array.prototype.slice.call(arguments);
-    if (this.validate_) {
-      var validationErrors = this.validate_(args);
-      if (validationErrors) {
-        return validationErrors;
-      }
-    }
-    for (var i = 0; i < this.listeners_.length; i++) {
-      try {
-        this.listeners_[i].apply(null, args);
-      } catch (e) {
-        console.error("Error in event handler for '" + this.eventName_ +
-                      "': " + e.stack);
-      }
-    }
-  };
-
-  // Attaches this event object to its name.  Only one object can have a given
-  // name.
-  chrome.Event.prototype.attach_ = function() {
-    AttachEvent(this.eventName_);
-    allAttachedEvents[allAttachedEvents.length] = this;
-    if (!this.eventName_)
-      return;
-
-    if (attachedNamedEvents[this.eventName_]) {
-      throw new Error("chrome.Event '" + this.eventName_ +
-                      "' is already attached.");
-    }
-
-    attachedNamedEvents[this.eventName_] = this;
-  };
-
-  // Detaches this event object from its name.
-  chrome.Event.prototype.detach_ = function() {
-    var i = allAttachedEvents.indexOf(this);
-    if (i >= 0)
-      delete allAttachedEvents[i];
-    DetachEvent(this.eventName_);
-    if (!this.eventName_)
-      return;
-
-    if (!attachedNamedEvents[this.eventName_]) {
-      throw new Error("chrome.Event '" + this.eventName_ +
-                      "' is not attached.");
-    }
-
-    delete attachedNamedEvents[this.eventName_];
-  };
-
-  chrome.Event.prototype.destroy_ = function() {
-    this.listeners_ = [];
-    this.validate_ = [];
-    this.detach_();
-  };
-
-  // Special load events: we don't use the DOM unload because that slows
-  // down tab shutdown.  On the other hand, onUnload might not always fire,
-  // since Chrome will terminate renderers on shutdown (SuddenTermination).
-  chromeHidden.onLoad = new chrome.Event();
-  chromeHidden.onUnload = new chrome.Event();
-
-  chromeHidden.dispatchOnLoad = function(extensionId, isExtensionProcess,
-                                         isIncognitoContext) {
-    chromeHidden.onLoad.dispatch(extensionId, isExtensionProcess,
-                                 isIncognitoContext);
-  };
-
-  chromeHidden.dispatchOnUnload = function() {
-    chromeHidden.onUnload.dispatch();
-    for (var i = 0; i < allAttachedEvents.length; ++i) {
-      var event = allAttachedEvents[i];
-      if (event)
-        event.detach_();
-    }
-  };
-
-  chromeHidden.dispatchError = function(msg) {
-    console.error(msg);
-  };
-})();