Jquery plugin for unified mouse and touch events
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/6421/24600/jqueryeventue.js
/*
* Jquery plugin for unified mouse and touch events
*
* Copyright (c) 2013 Michael S. Mikowski
* (mike[dot]mikowski[at]gmail[dotcom])
*
* Dual licensed under the MIT or GPL Version 2
* http://jquery.org/license
*
* Versions
* 0.3.0 - Initial jQuery plugin site release
* - Replaced scrollwheel zoom with drag motion.
* This resolved a conflict with scrollable areas.
* 0.3.1 - Change for jQuery plugins site
* 0.3.2 - Updated to jQuery 1.9.1.
* Confirmed 1.7.0-1.9.1 compatibility.
*
*/
/*jslint browser : true, continue : true,
devel : true, indent : 2, maxerr : 50,
newcap : true, plusplus : true, regexp : true,
sloppy : true, vars : true, white : true
*/
/*global jQuery, sl */
(function ( $ ) {
//---------------- BEGIN MODULE SCOPE VARIABLES --------------
var
$Special = $.event.special, // shortcut for special event
motionMapMap = {}, // map of pointer motions by cursor
isMoveBound = false, // flag if move handlers bound
pxPinchZoom = -1, // distance between pinch-zoom points
optionKey = 'ue_bound', // data key for storing options
doDisableMouse = false, // flag to discard mouse input
defaultOptMap = { // Default option hash
bound_ns_map : {}, // namspace hash e.g. bound_ns_map.utap.fred
wheel_ratio : 15, // multiplier for mousewheel delta
px_radius : 3, // 'distance' dragged before dragstart
ignore_class : ':input', // 'not' suppress matching elements
tap_time : 200, // millisecond max time to consider tap
held_tap_time : 300 // millisecond min time to consider taphold
},
callbackList = [], // global callback stack
zoomMouseNum = 1, // multiplier for mouse zoom
zoomTouchNum = 4, // multiplier for touch zoom
boundList, Ue,
motionDragId, motionHeldId, motionDzoomId,
motion1ZoomId, motion2ZoomId,
checkMatchVal, removeListVal, pushUniqVal, makeListPlus,
fnHeld, fnMotionStart, fnMotionMove,
fnMotionEnd, onMouse, onTouch,
onMousewheel
;
//----------------- END MODULE SCOPE VARIABLES ---------------
//------------------- BEGIN UTILITY METHODS ------------------
// Begin utiltity /makeListPlus/
// Returns an array with much desired methods:
// * remove_val(value) : remove element that matches
// the provided value. Returns number of elements
// removed.
// * match_val(value) : shows if a value exists
// * push_uniq(value) : pushes a value onto the stack
// iff it does not already exist there
// Note: the reason I need this is to compare objects to
// objects (perhaps jQuery has something similar?)
checkMatchVal = function ( data ) {
var match_count = 0, idx;
for ( idx = this.length; idx; 0 ) {
if ( this[--idx] === data ) { match_count++; }
}
return match_count;
};
removeListVal = function ( data ) {
var removed_count = 0, idx;
for ( idx = this.length; idx; 0 ) {
if ( this[--idx] === data ) {
this.splice(idx, 1);
removed_count++;
idx++;
}
}
return removed_count;
};
pushUniqVal = function ( data ) {
if ( checkMatchVal.call(this, data ) ) { return false; }
this.push( data );
return true;
};
// primary utility
makeListPlus = function ( input_list ) {
if ( input_list && $.isArray(input_list) ) {
if ( input_list.remove_val ) {
console.warn( 'The array appears to already have listPlus capabilities' );
return input_list;
}
}
else {
input_list = [];
}
input_list.remove_val = removeListVal;
input_list.match_val = checkMatchVal;
input_list.push_uniq = pushUniqVal;
return input_list;
};
// End utility /makeListPlus/
//-------------------- END UTILITY METHODS -------------------
//--------------- BEGIN JQUERY SPECIAL EVENTS ----------------
// Unique array for bound objects
boundList = makeListPlus();
// Begin define special event handlers
Ue = {
setup : function( data, a_names, fn_bind ) {
var
elem_this = this,
$to_bind = $(elem_this),
seen_map = {},
option_map, idx, namespace_key, ue_namespace_code, namespace_list
;
// if previous related event bound do not rebind, but do add to
// type of event bound to this element, if not already noted
if ( $.data( this, optionKey ) ) { return; }
option_map = {};
$.extend( true, option_map, defaultOptMap );
$.data( elem_this, optionKey, option_map );
namespace_list = makeListPlus(a_names.slice(0));
if ( ! namespace_list.length
|| namespace_list[0] === ""
) { namespace_list = ["000"]; }
NSPACE_00:
for ( idx = 0; idx < namespace_list.length; idx++ ) {
namespace_key = namespace_list[idx];
if ( ! namespace_key ) { continue NSPACE_00; }
if ( seen_map.hasOwnProperty(namespace_key) ) { continue NSPACE_00; }
seen_map[namespace_key] = true;
ue_namespace_code = '.__ue' + namespace_key;
$to_bind.bind( 'mousedown' + ue_namespace_code, onMouse );
$to_bind.bind( 'touchstart' + ue_namespace_code, onTouch );
$to_bind.bind( 'mousewheel' + ue_namespace_code, onMousewheel );
}
boundList.push_uniq( elem_this ); // record as bound element
if ( ! isMoveBound ) {
// console.log('first element bound - adding global binds');
$(document).bind( 'mousemove.__ue', onMouse );
$(document).bind( 'touchmove.__ue', onTouch );
$(document).bind( 'mouseup.__ue' , onMouse );
$(document).bind( 'touchend.__ue' , onTouch );
isMoveBound = true;
}
},
// arg_map.type = string - name of event to bind
// arg_map.data = poly - whatever (optional) data was passed when binding
// arg_map.namespace = string - A sorted, dot-delimited list of namespaces
// specified when binding the event
// arg_map.handler = fn - the event handler the developer wishes to be bound
// to the event. This function should be called whenever the event
// is triggered
// arg_map.guid = number - unique ID for event handler, provided by jQuery
// arg_map.selector = string - selector used by 'delegate' or 'live' jQuery
// methods. Only available when these methods are used.
//
// this - the element to which the event handler is being bound
// this always executes immediate after setup (if first binding)
add : function ( arg_map ) {
var
elem_this = this,
option_map = $.data( elem_this, optionKey ),
namespace_str = arg_map.namespace,
event_type = arg_map.type,
bound_ns_map, namespace_list, idx, namespace_key
;
if ( ! option_map ) { return; }
bound_ns_map = option_map.bound_ns_map;
if ( ! bound_ns_map[event_type] ) {
// this indicates a non-namespaced entry
bound_ns_map[event_type] = {};
}
if ( ! namespace_str ) { return; }
namespace_list = namespace_str.split('.');
for ( idx = 0; idx < namespace_list.length; idx++ ) {
namespace_key = namespace_list[idx];
bound_ns_map[event_type][namespace_key] = true;
}
},
remove : function ( arg_map ) {
var
elem_bound = this,
option_map = $.data( elem_bound, optionKey ),
bound_ns_map = option_map.bound_ns_map,
event_type = arg_map.type,
namespace_str = arg_map.namespace,
namespace_list, idx, namespace_key
;
if ( ! bound_ns_map[event_type] ) { return; }
// No namespace(s) provided:
// Remove complete record for custom event type (e.g. utap)
if ( ! namespace_str ) {
delete bound_ns_map[event_type];
return;
}
// Namespace(s) provided:
// Remove namespace flags from each custom event typei (e.g. utap)
// record. If all claimed namespaces are removed, remove
// complete record.
namespace_list = namespace_str.split('.');
for ( idx = 0; idx < namespace_list.length; idx++ ) {
namespace_key = namespace_list[idx];
if (bound_ns_map[event_type][namespace_key]) {
delete bound_ns_map[event_type][namespace_key];
}
}
if ( $.isEmptyObject( bound_ns_map[event_type] ) ) {
delete bound_ns_map[event_type];
}
},
teardown : function( a_names ) {
var
elem_bound = this,
$bound = $(elem_bound),
option_map = $.data( elem_bound, optionKey ),
bound_ns_map = option_map.bound_ns_map,
idx, namespace_key, ue_namespace_code, namespace_list
;
// do not tear down if related handlers are still bound
if ( ! $.isEmptyObject( bound_ns_map ) ) { return; }
namespace_list = makeListPlus(a_names);
namespace_list.push_uniq('000');
NSPACE_01:
for ( idx = 0; idx < namespace_list.length; idx++ ) {
namespace_key = namespace_list[idx];
if ( ! namespace_key ) { continue NSPACE_01; }
ue_namespace_code = '.__ue' + namespace_key;
$bound.unbind( 'mousedown' + ue_namespace_code );
$bound.unbind( 'touchstart' + ue_namespace_code );
$bound.unbind( 'mousewheel' + ue_namespace_code );
}
$.removeData( elem_bound, optionKey );
// Unbind document events only after last element element is removed
boundList.remove_val(this);
if ( boundList.length === 0 ) {
// console.log('last bound element removed - removing global binds');
$(document).unbind( 'mousemove.__ue');
$(document).unbind( 'touchmove.__ue');
$(document).unbind( 'mouseup.__ue');
$(document).unbind( 'touchend.__ue');
isMoveBound = false;
}
}
};
// End define special event handlers
//--------------- BEGIN JQUERY SPECIAL EVENTS ----------------
//------------------ BEGIN MOTION CONTROLS -------------------
// Begin motion control /fnHeld/
fnHeld = function ( arg_map ) {
var
timestamp = +new Date(),
motion_id = arg_map.motion_id,
motion_map = arg_map.motion_map,
bound_ns_map = arg_map.bound_ns_map,
event_ue
;
delete motion_map.idto_tapheld;
if ( ! motion_map.do_allow_tap ) { return; }
motion_map.px_end_x = motion_map.px_start_x;
motion_map.px_end_y = motion_map.px_start_y;
motion_map.ms_timestop = timestamp;
motion_map.ms_elapsed = timestamp - motion_map.ms_timestart;
if ( bound_ns_map.uheld ) {
event_ue = $.Event('uheld');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
}
// remove tracking, as we want no futher action on this motion
if ( bound_ns_map.uheldstart ) {
event_ue = $.Event('uheldstart');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
motionHeldId = motion_id;
}
else {
delete motionMapMap[motion_id];
}
};
// End motion control /fnHeld/
// Begin motion control /fnMotionStart/
fnMotionStart = function ( arg_map ) {
var
motion_id = arg_map.motion_id,
event_src = arg_map.event_src,
request_dzoom = arg_map.request_dzoom,
option_map = $.data( arg_map.elem, optionKey ),
bound_ns_map = option_map.bound_ns_map,
$target = $(event_src.target ),
do_zoomstart = false,
motion_map, cb_map, do_allow_tap, event_ue
;
// this should never happen, but it does
if ( motionMapMap[ motion_id ] ) { return; }
if ( request_dzoom && ! bound_ns_map.uzoomstart ) { return; }
// :input selector includes text areas
if ( $target.is( option_map.ignore_class ) ) { return; }
do_allow_tap = bound_ns_map.utap
|| bound_ns_map.uheld || bound_ns_map.uheldstart
? true : false;
cb_map = callbackList.pop();
while ( cb_map ) {
if ( $target.is( cb_map.selector_str )
|| $( arg_map.elem ).is( cb_map.selector_str )
) {
if ( cb_map.callback_match ) {
cb_map.callback_match( arg_map );
}
}
else {
if ( cb_map.callback_nomatch ) {
cb_map.callback_nomatch( arg_map );
}
}
cb_map = callbackList.pop();
}
motion_map = {
do_allow_tap : do_allow_tap,
elem_bound : arg_map.elem,
elem_target : event_src.target,
ms_elapsed : 0,
ms_timestart : event_src.timeStamp,
ms_timestop : undefined,
option_map : option_map,
orig_target : event_src.target,
px_current_x : event_src.clientX,
px_current_y : event_src.clientY,
px_end_x : undefined,
px_end_y : undefined,
px_start_x : event_src.clientX,
px_start_y : event_src.clientY,
timeStamp : event_src.timeStamp
};
motionMapMap[ motion_id ] = motion_map;
if ( bound_ns_map.uzoomstart ) {
if ( request_dzoom ) {
motionDzoomId = motion_id;
}
else if ( ! motion1ZoomId ) {
motion1ZoomId = motion_id;
}
else if ( ! motion2ZoomId ) {
motion2ZoomId = motion_id;
event_ue = $.Event('uzoomstart');
do_zoomstart = true;
}
if ( do_zoomstart ) {
event_ue = $.Event( 'uzoomstart' );
motion_map.px_delta_zoom = 0;
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
return;
}
}
if ( bound_ns_map.uheld || bound_ns_map.uheldstart ) {
motion_map.idto_tapheld = setTimeout(
function() {
fnHeld({
motion_id : motion_id,
motion_map : motion_map,
bound_ns_map : bound_ns_map
});
},
option_map.held_tap_time
);
}
};
// End motion control /fnMotionStart/
// Begin motion control /fnMotionMove/
fnMotionMove = function ( arg_map ) {
var
motion_id = arg_map.motion_id,
event_src = arg_map.event_src,
do_zoommove = false,
motion_map, option_map, bound_ns_map,
event_ue, px_pinch_zoom, px_delta_zoom,
mzoom1_map, mzoom2_map
;
if ( ! motionMapMap[motion_id] ) { return; }
motion_map = motionMapMap[motion_id];
option_map = motion_map.option_map;
bound_ns_map = option_map.bound_ns_map;
motion_map.timeStamp = event_src.timeStamp;
motion_map.elem_target = event_src.target;
motion_map.ms_elapsed = event_src.timeStamp - motion_map.ms_timestart;
motion_map.px_delta_x = event_src.clientX - motion_map.px_current_x;
motion_map.px_delta_y = event_src.clientY - motion_map.px_current_y;
motion_map.px_current_x = event_src.clientX;
motion_map.px_current_y = event_src.clientY;
// native event object override
motion_map.timeStamp = event_src.timeStamp;
// disallow tap if outside of zone or time elapsed
// we use this for other events, so we do it every time
if ( motion_map.do_allow_tap ) {
if ( Math.abs(motion_map.px_delta_x) > option_map.px_radius
|| Math.abs(motion_map.pd_delta_y) > option_map.px_radius
|| motion_map.ms_elapsed > option_map.tap_time
) { motion_map.do_allow_tap = false; }
}
if ( motion1ZoomId && motion2ZoomId
&& ( motion_id === motion1ZoomId
|| motion_id === motion2ZoomId
)) {
motionMapMap[motion_id] = motion_map;
mzoom1_map = motionMapMap[motion1ZoomId];
mzoom2_map = motionMapMap[motion2ZoomId];
px_pinch_zoom = Math.floor(
Math.sqrt(
Math.pow((mzoom1_map.px_current_x - mzoom2_map.px_current_x),2)
+ Math.pow((mzoom1_map.px_current_y - mzoom2_map.px_current_y),2)
) +0.5
);
if ( pxPinchZoom === -1 ) { px_delta_zoom = 0; }
else { px_delta_zoom = ( px_pinch_zoom - pxPinchZoom ) * zoomTouchNum;}
// save value for next iteration delta comparison
pxPinchZoom = px_pinch_zoom;
do_zoommove = true;
}
else if ( motionDzoomId === motion_id ) {
if ( bound_ns_map.uzoommove ) {
px_delta_zoom = motion_map.px_delta_y * zoomMouseNum;
do_zoommove = true;
}
}
if ( do_zoommove ){
event_ue = $.Event('uzoommove');
motion_map.px_delta_zoom = px_delta_zoom;
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
return;
}
if ( motionHeldId === motion_id ) {
if ( bound_ns_map.uheldmove ) {
event_ue = $.Event('uheldmove');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
event_src.preventDefault();
}
}
else if ( motionDragId === motion_id ) {
if ( bound_ns_map.udragmove ) {
event_ue = $.Event('udragmove');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
event_src.preventDefault();
}
}
if ( ! motionDragId
&& ! motionHeldId
&& bound_ns_map.udragstart
&& motion_map.do_allow_tap === false
) {
motionDragId = motion_id;
event_ue = $.Event('udragstart');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
event_src.preventDefault();
if ( motion_map.idto_tapheld ) {
clearTimeout(motion_map.idto_tapheld);
delete motion_map.idto_tapheld;
}
}
};
// End motion control /fnMotionMove/
// Begin motion control /fnMotionEnd/
fnMotionEnd = function ( arg_map ) {
var
motion_id = arg_map.motion_id,
event_src = arg_map.event_src,
do_zoomend = false,
motion_map, option_map, bound_ns_map, event_ue
;
doDisableMouse = false;
if ( ! motionMapMap[motion_id] ) { return; }
motion_map = motionMapMap[motion_id];
option_map = motion_map.option_map;
bound_ns_map = option_map.bound_ns_map;
motion_map.elem_target = event_src.target;
motion_map.ms_elapsed = event_src.timeStamp - motion_map.ms_timestart;
motion_map.ms_timestop = event_src.timeStamp;
if ( motion_map.px_current_x ) {
motion_map.px_delta_x = event_src.clientX - motion_map.px_current_x;
motion_map.px_delta_y = event_src.clientY - motion_map.px_current_y;
}
motion_map.px_current_x = event_src.clientX;
motion_map.px_current_y = event_src.clientY;
motion_map.px_end_x = event_src.clientX;
motion_map.px_end_y = event_src.clientY;
// native event object override
motion_map.timeStamp = event_src.timeStamp
;
// clear-out any long-hold tap timer
if ( motion_map.idto_tapheld ) {
clearTimeout(motion_map.idto_tapheld);
delete motion_map.idto_tapheld;
}
// trigger utap
if ( bound_ns_map.utap
&& motion_map.ms_elapsed <= option_map.tap_time
&& motion_map.do_allow_tap
) {
event_ue = $.Event('utap');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
}
// trigger udragend
if ( motion_id === motionDragId ) {
if ( bound_ns_map.udragend ) {
event_ue = $.Event('udragend');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
event_src.preventDefault();
}
motionDragId = undefined;
}
// trigger heldend
if ( motion_id === motionHeldId ) {
if ( bound_ns_map.uheldend ) {
event_ue = $.Event('uheldend');
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
}
motionHeldId = undefined;
}
// trigger uzoomend
if ( motion_id === motionDzoomId ) {
do_zoomend = true;
motionDzoomId = undefined;
}
// cleanup zoom info
else if ( motion_id === motion1ZoomId ) {
if ( motion2ZoomId ) {
motion1ZoomId = motion2ZoomId;
motion2ZoomId = undefined;
do_zoomend = true;
}
else { motion1ZoomId = undefined; }
pxPinchZoom = -1;
}
if ( motion_id === motion2ZoomId ) {
motion2ZoomId = undefined;
pxPinchZoom = -1;
do_zoomend = true;
}
if ( do_zoomend && bound_ns_map.uzoomend ) {
event_ue = $.Event('uzoomend');
motion_map.px_delta_zoom = 0;
$.extend( event_ue, motion_map );
$(motion_map.elem_bound).trigger(event_ue);
}
// remove pointer from consideration
delete motionMapMap[motion_id];
};
// End motion control /fnMotionEnd/
//------------------ END MOTION CONTROLS -------------------
//------------------- BEGIN EVENT HANDLERS -------------------
// Begin event handler /onTouch/ for all touch events.
// We use the 'type' attribute to dispatch to motion control
onTouch = function ( event ) {
var
elem_this = this,
timestamp = +new Date(),
o_event = event.originalEvent,
a_touches = o_event.changedTouches || [],
idx, touch_event, motion_id,
handler_fn
;
doDisableMouse = true;
event.timeStamp = timestamp;
switch ( event.type ) {
case 'touchstart' : handler_fn = fnMotionStart; break;
case 'touchmove' :
handler_fn = fnMotionMove;
break;
case 'touchend' : handler_fn = fnMotionEnd; break;
default : handler_fn = null;
}
if ( ! handler_fn ) { return; }
for ( idx = 0; idx < a_touches.length; idx++ ) {
touch_event = a_touches[idx];
motion_id = 'touch' + String(touch_event.identifier);
event.clientX = touch_event.clientX;
event.clientY = touch_event.clientY;
handler_fn({
elem : elem_this,
motion_id : motion_id,
event_src : event
});
}
};
// End event handler /onTouch/
// Begin event handler /onMouse/ for all mouse events
// We use the 'type' attribute to dispatch to motion control
onMouse = function ( event ) {
var
elem_this = this,
motion_id = 'mouse' + String(event.button),
request_dzoom = false,
handler_fn
;
if ( doDisableMouse ) {
event.stopImmediatePropagation();
return;
}
if ( event.shiftKey ) { request_dzoom = true; }
// skip left or middle clicks
if ( event.type !== 'mousemove' ) {
if ( event.button !== 0 ) { return true; }
}
switch ( event.type ) {
case 'mousedown' : handler_fn = fnMotionStart; event.preventDefault(); break;
case 'mouseup' : handler_fn = fnMotionEnd; break;
case 'mousemove' :
handler_fn = fnMotionMove;
event.preventDefault();
break;
default : handler_fn = null;
}
if ( ! handler_fn ) { return; }
handler_fn({
elem : elem_this,
event_src : event,
request_dzoom : request_dzoom,
motion_id : motion_id
});
};
// End event handler /onMouse/
//-------------------- END EVENT HANDLERS --------------------
// Export special events through jQuery API
$Special.ue
= $Special.utap = $Special.uheld
= $Special.uzoomstart = $Special.uzoommove = $Special.uzoomend
= $Special.udragstart = $Special.udragmove = $Special.udragend
= $Special.uheldstart = $Special.uheldmove = $Special.uheldend
= Ue
;
$.ueSetGlobalCb = function ( selector_str, callback_match, callback_nomatch ) {
callbackList.push( {
selector_str : selector_str || '',
callback_match : callback_match || null,
callback_nomatch : callback_nomatch || null
});
};
}(jQuery));