marquee.jquery.js (<marquee> handler) [1032505]

/**
* author Remy Sharp
* url http://remysharp.com/tag/marquee
* https://remysharp.com/2008/09/10/the-silky-smooth-marquee/
*/

(function ($) {
    $.fn.marquee = function (klass) {
        var newMarquee = [],
            last = this.length;

        // works out the left or right hand reset position, based on scroll
        // behavior, current direction and new direction
        function getReset(newDir, marqueeRedux, marqueeState) {
            var behavior = marqueeState.behavior, width = marqueeState.width, dir = marqueeState.dir;
            var r = 0;
            if (behavior == 'alternate') {
                r = newDir == 1 ? marqueeRedux[marqueeState.widthAxis] - (width*2) : width;
            } else if (behavior == 'slide') {
                if (newDir == -1) {
                    r = dir == -1 ? marqueeRedux[marqueeState.widthAxis] : width;
                } else {
                    r = dir == -1 ? marqueeRedux[marqueeState.widthAxis] - (width*2) : 0;
                }
            } else {
                r = newDir == -1 ? marqueeRedux[marqueeState.widthAxis] : 0;
            }
            return r;
        }

        // single "thread" animation
        function animateMarquee() {
            var i = newMarquee.length,
                marqueeRedux = null,
                $marqueeRedux = null,
                marqueeState = {},
                newMarqueeList = [],
                hitedge = false;
                
            while (i--) {
                marqueeRedux = newMarquee[i];
                $marqueeRedux = $(marqueeRedux);
                marqueeState = $marqueeRedux.data('marqueeState');
                
                if ($marqueeRedux.data('paused') !== true) {
                    // TODO read scrollamount, dir, behavior, loops and last from data
                    marqueeRedux[marqueeState.axis] += (marqueeState.scrollamount * marqueeState.dir);

                    // only true if it's hit the end
                    hitedge = marqueeState.dir == -1 ? marqueeRedux[marqueeState.axis] <= getReset(marqueeState.dir * -1, marqueeRedux, marqueeState) : marqueeRedux[marqueeState.axis] >= getReset(marqueeState.dir * -1, marqueeRedux, marqueeState);
                    
                    if ((marqueeState.behavior == 'scroll' && marqueeState.last == marqueeRedux[marqueeState.axis]) || (marqueeState.behavior == 'alternate' && hitedge && marqueeState.last != -1) || (marqueeState.behavior == 'slide' && hitedge && marqueeState.last != -1)) {                        
                        if (marqueeState.behavior == 'alternate') {
                            marqueeState.dir *= -1; // flip
                        }
                        marqueeState.last = -1;

                        $marqueeRedux.trigger('stop');

                        marqueeState.loops--;
                        if (marqueeState.loops === 0) {
                            if (marqueeState.behavior != 'slide') {
                                marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir, marqueeRedux, marqueeState);
                            } else {
                                // corrects the position
                                marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir * -1, marqueeRedux, marqueeState);
                            }

                            $marqueeRedux.trigger('end');
                        } else {
                            // keep this marquee going
                            newMarqueeList.push(marqueeRedux);
                            $marqueeRedux.trigger('start');
                            marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir, marqueeRedux, marqueeState);
                        }
                    } else {
                        newMarqueeList.push(marqueeRedux);
                    }
                    marqueeState.last = marqueeRedux[marqueeState.axis];

                    // store updated state only if we ran an animation
                    $marqueeRedux.data('marqueeState', marqueeState);
                } else {
                    // even though it's paused, keep it in the list
                    newMarqueeList.push(marqueeRedux);                    
                }
            }

            newMarquee = newMarqueeList;
            
            if (newMarquee.length) {
                setTimeout(animateMarquee, 25);
            }            
        }
        
        // TODO consider whether using .html() in the wrapping process could lead to loosing predefined events...
        this.each(function (i) {
            var $marquee = $(this),
                width = $marquee.attr('width') || $marquee.width(),
                height = $marquee.attr('height') || $marquee.height(),
                $marqueeRedux = $marquee.after('<div ' + (klass ? 'class="' + klass + '" ' : '') + 'style="display: block-inline; width: ' + width + 'px; height: ' + height + 'px; overflow: hidden;"><div style="float: left; white-space: nowrap;">' + $marquee.html() + '</div></div>').next(),
                marqueeRedux = $marqueeRedux.get(0),
                hitedge = 0,
                direction = ($marquee.attr('direction') || 'left').toLowerCase(),
                marqueeState = {
                    dir : /down|right/.test(direction) ? -1 : 1,
                    axis : /left|right/.test(direction) ? 'scrollLeft' : 'scrollTop',
                    widthAxis : /left|right/.test(direction) ? 'scrollWidth' : 'scrollHeight',
                    last : -1,
                    loops : $marquee.attr('loop') || -1,
                    scrollamount : $marquee.attr('scrollamount') || this.scrollAmount || 2,
                    behavior : ($marquee.attr('behavior') || 'scroll').toLowerCase(),
                    width : /left|right/.test(direction) ? width : height
                };
            
            // corrects a bug in Firefox - the default loops for slide is -1
            if ($marquee.attr('loop') == -1 && marqueeState.behavior == 'slide') {
                marqueeState.loops = 1;
            }

            $marquee.remove();
            
            // add padding
            if (/left|right/.test(direction)) {
                $marqueeRedux.find('> div').css('padding', '0 ' + width + 'px');
            } else {
                $marqueeRedux.find('> div').css('padding', height + 'px 0');
            }
            
            // events
            $marqueeRedux.bind('stop', function () {
                $marqueeRedux.data('paused', true);
            }).bind('pause', function () {
                $marqueeRedux.data('paused', true);
            }).bind('start', function () {
                $marqueeRedux.data('paused', false);
            }).bind('unpause', function () {
                $marqueeRedux.data('paused', false);
            }).data('marqueeState', marqueeState); // finally: store the state
            
            // todo - rerender event allowing us to do an ajax hit and redraw the marquee

            newMarquee.push(marqueeRedux);

            marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir, marqueeRedux, marqueeState);
            $marqueeRedux.trigger('start');
            
            // on the very last marquee, trigger the animation
            if (i+1 == last) {
                animateMarquee();
            }
        });            

        return $(newMarquee);
    };
}(jQuery));

1	/**
2	* author Remy Sharp
3	* url http://remysharp.com/tag/marquee
4	* https://remysharp.com/2008/09/10/the-silky-smooth-marquee/
5	*/
6
7	(function ($) {
8	$.fn.marquee = function (klass) {
9	var newMarquee = [],
10	last = this.length;
11
12	// works out the left or right hand reset position, based on scroll
13	// behavior, current direction and new direction
14	function getReset(newDir, marqueeRedux, marqueeState) {
15	var behavior = marqueeState.behavior, width = marqueeState.width, dir = marqueeState.dir;
16	var r = 0;
17	if (behavior == 'alternate') {
18	r = newDir == 1 ? marqueeRedux[marqueeState.widthAxis] - (width*2) : width;
19	} else if (behavior == 'slide') {
20	if (newDir == -1) {
21	r = dir == -1 ? marqueeRedux[marqueeState.widthAxis] : width;
22	} else {
23	r = dir == -1 ? marqueeRedux[marqueeState.widthAxis] - (width*2) : 0;
24	}
25	} else {
26	r = newDir == -1 ? marqueeRedux[marqueeState.widthAxis] : 0;
27	}
28	return r;
29	}
30
31	// single "thread" animation
32	function animateMarquee() {
33	var i = newMarquee.length,
34	marqueeRedux = null,
35	$marqueeRedux = null,
36	marqueeState = {},
37	newMarqueeList = [],
38	hitedge = false;
39
40	while (i--) {
41	marqueeRedux = newMarquee[i];
42	$marqueeRedux = $(marqueeRedux);
43	marqueeState = $marqueeRedux.data('marqueeState');
44
45	if ($marqueeRedux.data('paused') !== true) {
46	// TODO read scrollamount, dir, behavior, loops and last from data
47	marqueeRedux[marqueeState.axis] += (marqueeState.scrollamount * marqueeState.dir);
48
49	// only true if it's hit the end
50	hitedge = marqueeState.dir == -1 ? marqueeRedux[marqueeState.axis] <= getReset(marqueeState.dir * -1, marqueeRedux, marqueeState) : marqueeRedux[marqueeState.axis] >= getReset(marqueeState.dir * -1, marqueeRedux, marqueeState);
51
52	if ((marqueeState.behavior == 'scroll' && marqueeState.last == marqueeRedux[marqueeState.axis]) \|\| (marqueeState.behavior == 'alternate' && hitedge && marqueeState.last != -1) \|\| (marqueeState.behavior == 'slide' && hitedge && marqueeState.last != -1)) {
53	if (marqueeState.behavior == 'alternate') {
54	marqueeState.dir *= -1; // flip
55	}
56	marqueeState.last = -1;
57
58	$marqueeRedux.trigger('stop');
59
60	marqueeState.loops--;
61	if (marqueeState.loops === 0) {
62	if (marqueeState.behavior != 'slide') {
63	marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir, marqueeRedux, marqueeState);
64	} else {
65	// corrects the position
66	marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir * -1, marqueeRedux, marqueeState);
67	}
68
69	$marqueeRedux.trigger('end');
70	} else {
71	// keep this marquee going
72	newMarqueeList.push(marqueeRedux);
73	$marqueeRedux.trigger('start');
74	marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir, marqueeRedux, marqueeState);
75	}
76	} else {
77	newMarqueeList.push(marqueeRedux);
78	}
79	marqueeState.last = marqueeRedux[marqueeState.axis];
80
81	// store updated state only if we ran an animation
82	$marqueeRedux.data('marqueeState', marqueeState);
83	} else {
84	// even though it's paused, keep it in the list
85	newMarqueeList.push(marqueeRedux);
86	}
87	}
88
89	newMarquee = newMarqueeList;
90
91	if (newMarquee.length) {
92	setTimeout(animateMarquee, 25);
93	}
94	}
95
96	// TODO consider whether using .html() in the wrapping process could lead to loosing predefined events...
97	this.each(function (i) {
98	var $marquee = $(this),
99	width = $marquee.attr('width') \|\| $marquee.width(),
100	height = $marquee.attr('height') \|\| $marquee.height(),
101	$marqueeRedux = $marquee.after('<div ' + (klass ? 'class="' + klass + '" ' : '') + 'style="display: block-inline; width: ' + width + 'px; height: ' + height + 'px; overflow: hidden;"><div style="float: left; white-space: nowrap;">' + $marquee.html() + '</div></div>').next(),
102	marqueeRedux = $marqueeRedux.get(0),
103	hitedge = 0,
104	direction = ($marquee.attr('direction') \|\| 'left').toLowerCase(),
105	marqueeState = {
106	dir : /down\|right/.test(direction) ? -1 : 1,
107	axis : /left\|right/.test(direction) ? 'scrollLeft' : 'scrollTop',
108	widthAxis : /left\|right/.test(direction) ? 'scrollWidth' : 'scrollHeight',
109	last : -1,
110	loops : $marquee.attr('loop') \|\| -1,
111	scrollamount : $marquee.attr('scrollamount') \|\| this.scrollAmount \|\| 2,
112	behavior : ($marquee.attr('behavior') \|\| 'scroll').toLowerCase(),
113	width : /left\|right/.test(direction) ? width : height
114	};
115
116	// corrects a bug in Firefox - the default loops for slide is -1
117	if ($marquee.attr('loop') == -1 && marqueeState.behavior == 'slide') {
118	marqueeState.loops = 1;
119	}
120
121	$marquee.remove();
122
123	// add padding
124	if (/left\|right/.test(direction)) {
125	$marqueeRedux.find('> div').css('padding', '0 ' + width + 'px');
126	} else {
127	$marqueeRedux.find('> div').css('padding', height + 'px 0');
128	}
129
130	// events
131	$marqueeRedux.bind('stop', function () {
132	$marqueeRedux.data('paused', true);
133	}).bind('pause', function () {
134	$marqueeRedux.data('paused', true);
135	}).bind('start', function () {
136	$marqueeRedux.data('paused', false);
137	}).bind('unpause', function () {
138	$marqueeRedux.data('paused', false);
139	}).data('marqueeState', marqueeState); // finally: store the state
140
141	// todo - rerender event allowing us to do an ajax hit and redraw the marquee
142
143	newMarquee.push(marqueeRedux);
144
145	marqueeRedux[marqueeState.axis] = getReset(marqueeState.dir, marqueeRedux, marqueeState);
146	$marqueeRedux.trigger('start');
147
148	// on the very last marquee, trigger the animation
149	if (i+1 == last) {
150	animateMarquee();
151	}
152	});
153
154	return $(newMarquee);
155	};
156	}(jQuery));

Snippet ID:	#1032505
Snippet name:	marquee.jquery.js (<marquee> handler)
Eternal ID of this version:	#1032505/2
Text MD5:	2b038fa3855b9bfdb5010206711007fe
Author:	stefan
Category:	javascript
Type:	Document
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2021-09-11 22:33:56
Source code size:	7597 bytes / 156 lines
Pitched / IR pitched:	No / No
Views / Downloads:	162 / 59
Version history:	1 change(s)
Referenced in:	[show references]

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