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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+#include "nsIDOMMouseEvent.idl"
+
+/**
+ * The nsIDOMSimpleGestureEvent interface is the datatype for all
+ * Mozilla-specific simple gesture events in the Document Object Model.
+ *
+ * The following events are generated:
+ *
+ * MozSwipeGestureMayStart - Generated when the user starts a horizontal
+ * swipe across the input device, but before we know whether the user
+ * is actually scrolling past a scroll edge.
+ * This event asks two questions: Should a swipe really be started, and
+ * in which directions should the user be able to swipe? The first
+ * question is answered by event listeners by calling or not calling
+ * preventDefault() on the event. Since a swipe swallows all scroll
+ * events, the default action of the swipe start event is *not* to
+ * start a swipe. Call preventDefault() if you want a swipe to be
+ * started. Doing so won't necessarily result in a swipe being started,
+ * it only communicates an intention. Once Gecko determines whether a
+ * swipe should actually be started, it will send a MozSwipeGestureStart
+ * event.
+ * The second question (swipe-able directions) is answered in the
+ * allowedDirections field.
+ *
+ * MozSwipeGestureStart - This event signals the start of a swipe.
+ * It guarantees a future MozSwipeGestureEnd event that will signal
+ * the end of a swipe animation.
+ *
+ * MozSwipeGestureUpdate - Generated periodically while the user is
+ * continuing a horizontal swipe gesture. The "delta" value represents
+ * the current absolute gesture amount. This event may even be sent
+ * after a MozSwipeGesture event fired in order to allow for fluid
+ * completion of a swipe animation. The direction value is meaningless
+ * on swipe update events.
+ *
+ * MozSwipeGestureEnd - Generated when the swipe animation is completed.
+ *
+ * MozSwipeGesture - Generated when the user releases a swipe across
+ * across the input device. This event signals that the actual swipe
+ * operation is complete, even though the animation might not be finished
+ * yet. This event can be sent without accompanying start / update / end
+ * events, and it can also be handled on its own if the consumer doesn't
+ * want to handle swipe animation events.
+ * Only the direction value has any significance, the delta value is
+ * meaningless.
+ *
+ * MozMagnifyGestureStart - Generated when the user begins the magnify
+ * ("pinch") gesture. The "delta" value represents the initial
+ * movement.
+ *
+ * MozMagnifyGestureUpdate - Generated periodically while the user is
+ * continuing the magnify ("pinch") gesture. The "delta" value
+ * represents the movement since the last MozMagnifyGestureStart or
+ * MozMagnifyGestureUpdate event.
+ *
+ * MozMagnifyGesture - Generated when the user has completed the
+ * magnify ("pinch") gesture. If you only want to receive a single
+ * event when the magnify gesture is complete, you only need to hook
+ * this event and can safely ignore the MozMagnifyGestureStart and the
+ * MozMagnifyGestureUpdate events. The "delta" value is the cumulative
+ * amount represented by the user's gesture.
+ *
+ * MozRotateGestureStart - Generated when the user begins the rotation
+ * gesture. The "delta" value represents the initial rotation.
+ *
+ * MozRotateGestureUpdate - Generated periodically while the user is
+ * continuing the rotation gesture. The "delta" value represents the
+ * rotation since the last MozRotateGestureStart or
+ * MozRotateGestureUpdate event.
+ *
+ * MozRotateGesture - Generated when the user has completed the
+ * rotation gesture. If you only want to receive a single event when
+ * the rotation gesture is complete, you only need to hook this event
+ * and can safely ignore the MozRotateGestureStart and the
+ * MozRotateGestureUpdate events. The "delta" value is the cumulative
+ * amount of rotation represented by the user's gesture.
+ *
+ * MozTapGesture - Generated when the user executes a two finger
+ * tap gesture on the input device. Client coordinates contain the
+ * center point of the tap.
+ * (XXX On OS X, only Lion (10.7) and up)
+ *
+ * MozPressTapGesture - Generated when the user executes a press
+ * and tap two finger gesture (first finger down, second finger down,
+ * second finger up, first finger up) on the input device.
+ * Client coordinates contain the center pivot point of the action.
+ * (XXX Not implemented on Mac)
+ *
+ * MozEdgeUIGesture - Generated when the user swipes the display to
+ * invoke edge ui.
+ * (XXX Win8 only)
+ *
+ * Default behavior:
+ *
+ * Some operating systems support default behaviors for gesture events
+ * when they are not handled by the application. Consumers should
+ * use event.preventDefault() to prevent default behavior when
+ * consuming events.
+ */
+
+[builtinclass, uuid(c397f9a2-4266-4291-b282-3efd6d7afc57)]
+interface nsIDOMSimpleGestureEvent : nsIDOMMouseEvent
+{
+ /* Swipe direction constants */
+ const unsigned long DIRECTION_UP = 1;
+ const unsigned long DIRECTION_DOWN = 2;
+ const unsigned long DIRECTION_LEFT = 4;
+ const unsigned long DIRECTION_RIGHT = 8;
+
+ /* Rotational direction constants */
+ const unsigned long ROTATION_COUNTERCLOCKWISE = 1;
+ const unsigned long ROTATION_CLOCKWISE = 2;
+
+ /* Read-write value for swipe events.
+ *
+ * Reports the directions that can be swiped to; multiple directions
+ * should be OR'ed together.
+ *
+ * The allowedDirections field is designed to be set on SwipeGestureMayStart
+ * events by event listeners. Its value after event dispatch determines
+ * the behavior of the swipe animation that might be about to begin.
+ * Specifically, if the user swipes in a direction that can't be swiped
+ * to, the animation will have a bounce effect.
+ * Future SwipeGestureUpdate, SwipeGesture and SwipeGestureEnd events
+ * will carry the allowDirections value that was set on the SwipeMayStart
+ * event. Changing this field on non-SwipeGestureMayStart events doesn't
+ * have any effect.
+ */
+ attribute unsigned long allowedDirections;
+
+ /* Direction of a gesture. Diagonals are indicated by OR'ing the
+ * applicable constants together.
+ *
+ * Swipes gestures may occur in any direction.
+ *
+ * Magnify gestures do not have a direction.
+ *
+ * Rotation gestures will be either ROTATION_COUNTERCLOCKWISE or
+ * ROTATION_CLOCKWISE.
+ */
+ readonly attribute unsigned long direction;
+
+ /* Delta value for magnify, rotate and swipe gestures.
+ *
+ * For rotation, the value is in degrees and is positive for
+ * clockwise rotation and negative for counterclockwise
+ * rotation.
+ *
+ * For magnification, the value will be positive for a "zoom in"
+ * (i.e, increased magnification) and negative for a "zoom out"
+ * (i.e., decreased magnification). The particular units
+ * represented by the "delta" are currently implementation specific.
+ *
+ * XXX - The units for measuring magnification are currently
+ * unspecified because the units used by Mac OS X are currently
+ * undocumented. The values are typically in the range of 0.0 to
+ * 100.0, but it is only safe currently to rely on the delta being
+ * positive or negative.
+ *
+ * For swipe start, update and end events, the value is a fraction
+ * of one "page". If the resulting swipe will have DIRECTION_LEFT, the
+ * delta value will be positive; for DIRECTION_RIGHT, delta is negative.
+ * If this seems backwards to you, look at it this way: If the current
+ * page is pushed to the right during the animation (positive delta),
+ * the page left to the current page will be visible after the swipe
+ * (DIRECTION_LEFT).
+ *
+ * Units on Windows represent the difference between the initial
+ * and current/final width between the two touch points on the input
+ * device and are measured in pixels.
+ */
+ readonly attribute double delta;
+
+ /* Click count value for taps. */
+ readonly attribute unsigned long clickCount;
+};