goog.editor.plugins.EnterHandler

Adds an event listener to the event target. The same handler can only be added once per the type. Even if you add the same handler multiple times using the same type then it will only be called once when the event is dispatched.

Invokes a callback function when this object is disposed. Callbacks are invoked in the order in which they were added. If a callback is added to an already disposed Disposable, it will be called immediately.

Cleans the contents of the node passed to it. The node contents are modified directly, and the modifications will subsequently be used, for operations such as saving the innerHTML of the editor etc. Since the plugins act on the DOM directly, this method can be very expensive.

This op is invoked even on disabled plugins.

Cleans the html contents of Trogedit. Both cleanContentsDom and and cleanContentsHtml will be called on contents extracted from Trogedit. The inverse of prepareContentsHtml.

This op is invoked even on disabled plugins.

Deletes the element at the cursor if it is a BR node, and if it does, calls e.preventDefault to stop the browser from deleting. Only necessary in Gecko as a workaround for mozilla bug 205350 where deleting a BR that is followed by a block element doesn't work (the BR gets immediately replaced). We also need to account for an ill-formed cursor which occurs from us trying to stop the browser from deleting.

Disables this plugin for the specified, registered field object.

Dispatches an event (or event like object) and calls all listeners listening for events of this type. The type of the event is decided by the type property on the event object.

If any of the listeners returns false OR calls preventDefault then this function will return false. If one of the capture listeners calls stopPropagation, then the bubble listeners won't fire.

Disposes of the object and its resources.

Removes listeners from this object. Classes that extend EventTarget may need to override this method in order to remove references to DOM Elements and additional listeners.

Enables this plugin for the specified, registered field object. A field object should only be enabled when it is loaded.

Ensures all text in IE and Opera to be in the given tag in order to control Enter spacing. Call this when Enter is pressed if desired.

We want to make sure the user is always inside of a block (or other nodes listed in goog.editor.plugins.EnterHandler.IGNORE_ENSURE_BLOCK_NODES_). We listen to keypress to force nodes that the user is leaving to turn into blocks, but we also need to listen to keyup to force nodes that the user is entering to turn into blocks. Example: html is: <h2>foo[cursor]</h2>, and the user hits enter. We don't want to format the h2, but we do want to format the P that is created on enter. The P node is not available until keyup.

Handles execCommand. This default implementation handles dispatching BEFORECHANGE, CHANGE, and SELECTIONCHANGE events, and calls execCommandInternal to perform the actual command. Plugins that want to do their own event dispatching should override execCommand, otherwise it is preferred to only override execCommandInternal.

This version of execCommand will only work for single field plugins. Multi-field plugins must override execCommand.

Handles execCommand. This default implementation does nothing, and is called by execCommand, which handles event dispatching. This method should be overriden by plugins that don't need to do their own event dispatching. If custom event dispatching is needed, execCommand shoul be overriden instead.

TODO(user): This pattern makes accurate typing impossible.

Fires all registered listeners in this listenable for the given type and capture mode, passing them the given eventObject. This does not perform actual capture/bubble. Only implementors of the interface should be using this.

Sets the field object for use with this plugin.

Gets the goog.events.ListenableKey for the event or null if no such listener is in use.

Gets all listeners in this listenable for the given type and capture mode.

Gets HTML with no contents that won't collapse, for browsers that collapse the empty string.

Returns the parent of this event target to use for capture/bubble mechanism.

NOTE(chrishenry): The name reflects the original implementation of custom event target (goog.events.EventTarget). We decided that changing the name is not worth it.

Internal backspace handler.

Internal delete key handler.

Handle an enter key press on collapsed selection. handleEnterGecko_ ensures the selection is collapsed by deleting its contents if it is not. The default implementation does nothing.

Handle an enter key press in WebKit.

Handles keydown. It is run before handleKeyboardShortcut and if it returns true handleKeyboardShortcut will not be called.

Handles keypress. It is run before handleKeyboardShortcut and if it returns true handleKeyboardShortcut will not be called.

Handles keyup.

Internal handler for keyup events.

Handles keyboard shortcuts. Preferred to using handleKey* as it will use the proper event based on browser and will be more performant. If handleKeyPress/handleKeyDown returns true, this will not be called. If the plugin handles the shortcut, it is responsible for dispatching appropriate events (change, selection change at the time of this comment). If the plugin calls execCommand on the editable field, then execCommand already takes care of dispatching events. NOTE: For performance reasons this is only called when any key is pressed in conjunction with ctrl/meta keys OR when a small subset of keys (defined in goog.editor.Field.POTENTIAL_SHORTCUT_KEYCODES_) are pressed without ctrl/meta keys. We specifically don't invoke it when altKey is pressed since alt key is used in many i18n UIs to enter certain characters.

Handles selection change.

Whether there is any active listeners matching the specified signature. If either the type or capture parameters are unspecified, the function will match on the remaining criteria.

Returns whether this plugin is enabled for the field object.

Whether the string corresponds to a command this plugin handles.

Adds an event listener. A listener can only be added once to an object and if it is added again the key for the listener is returned. Note that if the existing listener is a one-off listener (registered via listenOnce), it will no longer be a one-off listener after a call to listen().

Adds an event listener that is removed automatically after the listener fired once.

If an existing listener already exists, listenOnce will do nothing. In particular, if the listener was previously registered via listen(), listenOnce() will not turn the listener into a one-off listener. Similarly, if there is already an existing one-off listener, listenOnce does not modify the listeners (it is still a once listener).

If the contents are empty, return the 'default' html for the field. The 'default' contents depend on the enter handling mode, so it makes the most sense in this plugin.

Fix paragraphs to be the correct type of node.

Gets the state of this command if this plugin serves that command.

Associates a disposable object with this object so that they will be disposed together.

Registers the field object for use with this plugin.

Removes all listeners from this listenable. If type is specified, it will only remove listeners of the particular type. otherwise all registered listeners will be removed.

Removes an event listener from the event target. The handler must be the same object as the one added. If the handler has not been added then nothing is done.

Saves the field's scroll position. See b/7279077 for context. Currently only does anything in Edge, since all other browsers already seem to work correctly.

Set if this plugin should automatically be disposed when the registered field is disposed.

Sets the field object for use with this plugin.

Sets the parent of this event target to use for capture/bubble mechanism.

Sets the target to be used for event.target when firing event. Mainly used for testing. For example, see goog.testing.events.mixinListenable.

Removes an event listener which was added with listen() or listenOnce().

Removes an event listener which was added with listen() by the key returned by listen().

Unregisters and disables this plugin for the current field object.

If monitoring the goog.Disposable instances is enabled, stores the creation stack trace of the Disposable instance.

The field object this plugin is attached to.

The logger for this plugin.

The type of block level tag to add on enter, for browsers that support specifying the default block-level tag. Can be overriden by subclasses; must be either DIV or P.

Whether this is a node that contains a single BR tag and non-nbsp whitespace.

Determines whether the lowest containing block node is a blockquote.