--- /dev/null
+/**
+* author Remy Sharp
+* url http://remysharp.com/tag/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));
fnp / wolnelektury.git / commitdiff