Dogfalo/materialize

(function ($) {
    $.fn.tooltip = function (options) {
      var timeout = null,
      margin = 5;

      // Defaults
      var defaults = {
        delay: 350,
        tooltip: '',
        position: 'bottom',
        html: false
      };

      // Remove tooltip from the activator
      if (options === "remove") {
        this.each(function() {
          $('#' + $(this).attr('data-tooltip-id')).remove();
          $(this).removeAttr('data-tooltip-id');
          $(this).off('mouseenter.tooltip mouseleave.tooltip');
        });
        return false;
      }

      options = $.extend(defaults, options);

      return this.each(function() {
        var tooltipId = Materialize.guid();
        var origin = $(this);

        // Destroy old tooltip
        if (origin.attr('data-tooltip-id')) {
          $('#' + origin.attr('data-tooltip-id')).remove();
        }

        origin.attr('data-tooltip-id', tooltipId);

        // Get attributes.
        var allowHtml,
            tooltipDelay,
            tooltipPosition,
            tooltipText,
            tooltipEl,
            backdrop;
        var setAttributes = function() {
          allowHtml = origin.attr('data-html') ? origin.attr('data-html') === 'true' : options.html;
          tooltipDelay = origin.attr('data-delay');
          tooltipDelay = (tooltipDelay === undefined || tooltipDelay === '') ?
              options.delay : tooltipDelay;
          tooltipPosition = origin.attr('data-position');
          tooltipPosition = (tooltipPosition === undefined || tooltipPosition === '') ?
              options.position : tooltipPosition;
          tooltipText = origin.attr('data-tooltip');
          tooltipText = (tooltipText === undefined || tooltipText === '') ?
              options.tooltip : tooltipText;
        };
        setAttributes();

        var renderTooltipEl = function() {
          var tooltip = $('<div class="material-tooltip"></div>');

          // Create Text span
          if (allowHtml) {
            tooltipText = $('<span></span>').html(tooltipText);
          } else{
            tooltipText = $('<span></span>').text(tooltipText);
          }

          // Create tooltip
          tooltip.append(tooltipText)
            .appendTo($('body'))
            .attr('id', tooltipId);

          // Create backdrop
          backdrop = $('<div class="backdrop"></div>');
          backdrop.appendTo(tooltip);
          return tooltip;
        };
        tooltipEl = renderTooltipEl();

        // Destroy previously binded events
        origin.off('mouseenter.tooltip mouseleave.tooltip');
        // Mouse In
        var started = false, timeoutRef;
        origin.on({'mouseenter.tooltip': function(e) {
          var showTooltip = function() {
            setAttributes();
            started = true;
            tooltipEl.velocity('stop');
            backdrop.velocity('stop');
            tooltipEl.css({ visibility: 'visible', left: '0px', top: '0px' });

            // Tooltip positioning
            var originWidth = origin.outerWidth();
            var originHeight = origin.outerHeight();
            var tooltipHeight = tooltipEl.outerHeight();
            var tooltipWidth = tooltipEl.outerWidth();
            var tooltipVerticalMovement = '0px';
            var tooltipHorizontalMovement = '0px';
            var backdropOffsetWidth = backdrop[0].offsetWidth;
            var backdropOffsetHeight = backdrop[0].offsetHeight;
            var scaleXFactor = 8;
            var scaleYFactor = 8;
            var scaleFactor = 0;
            var targetTop, targetLeft, newCoordinates;

            if (tooltipPosition === "top") {
              // Top Position
              targetTop = origin.offset().top - tooltipHeight - margin;
              targetLeft = origin.offset().left + originWidth/2 - tooltipWidth/2;
              newCoordinates = repositionWithinScreen(targetLeft, targetTop, tooltipWidth, tooltipHeight);
              tooltipVerticalMovement = '-10px';
              backdrop.css({
                bottom: 0,
                left: 0,
                borderRadius: '14px 14px 0 0',
                transformOrigin: '50% 100%',
                marginTop: tooltipHeight,
                marginLeft: (tooltipWidth/2) - (backdropOffsetWidth/2)
              });
            }
            // Left Position
            else if (tooltipPosition === "left") {
              targetTop = origin.offset().top + originHeight/2 - tooltipHeight/2;
              targetLeft =  origin.offset().left - tooltipWidth - margin;
              newCoordinates = repositionWithinScreen(targetLeft, targetTop, tooltipWidth, tooltipHeight);

              tooltipHorizontalMovement = '-10px';
              backdrop.css({
                top: '-7px',
                right: 0,
                width: '14px',
                height: '14px',
                borderRadius: '14px 0 0 14px',
                transformOrigin: '95% 50%',
                marginTop: tooltipHeight/2,
                marginLeft: tooltipWidth
              });
            }
            // Right Position
            else if (tooltipPosition === "right") {
              targetTop = origin.offset().top + originHeight/2 - tooltipHeight/2;
              targetLeft = origin.offset().left + originWidth + margin;
              newCoordinates = repositionWithinScreen(targetLeft, targetTop, tooltipWidth, tooltipHeight);

              tooltipHorizontalMovement = '+10px';
              backdrop.css({
                top: '-7px',
                left: 0,
                width: '14px',
                height: '14px',
                borderRadius: '0 14px 14px 0',
                transformOrigin: '5% 50%',
                marginTop: tooltipHeight/2,
                marginLeft: '0px'
              });
            }
            else {
              // Bottom Position
              targetTop = origin.offset().top + origin.outerHeight() + margin;
              targetLeft = origin.offset().left + originWidth/2 - tooltipWidth/2;
              newCoordinates = repositionWithinScreen(targetLeft, targetTop, tooltipWidth, tooltipHeight);
              tooltipVerticalMovement = '+10px';
              backdrop.css({
                top: 0,
                left: 0,
                marginLeft: (tooltipWidth/2) - (backdropOffsetWidth/2)
              });
            }

            // Set tooptip css placement
            tooltipEl.css({
              top: newCoordinates.y,
              left: newCoordinates.x
            });

            // Calculate Scale to fill
            scaleXFactor = Math.SQRT2 * tooltipWidth / parseInt(backdropOffsetWidth);
            scaleYFactor = Math.SQRT2 * tooltipHeight / parseInt(backdropOffsetHeight);
            scaleFactor = Math.max(scaleXFactor, scaleYFactor);

            tooltipEl.velocity({ translateY: tooltipVerticalMovement, translateX: tooltipHorizontalMovement}, { duration: 350, queue: false })
              .velocity({opacity: 1}, {duration: 300, delay: 50, queue: false});
            backdrop.css({ visibility: 'visible' })
              .velocity({opacity:1},{duration: 55, delay: 0, queue: false})
              .velocity({scaleX: scaleFactor, scaleY: scaleFactor}, {duration: 300, delay: 0, queue: false, easing: 'easeInOutQuad'});
          };

          timeoutRef = setTimeout(showTooltip, tooltipDelay); // End Interval

        // Mouse Out
        },
        'mouseleave.tooltip': function(){
          // Reset State
          started = false;
          clearTimeout(timeoutRef);

          // Animate back
          setTimeout(function() {
            if (started !== true) {
              tooltipEl.velocity({
                opacity: 0, translateY: 0, translateX: 0}, { duration: 225, queue: false});
              backdrop.velocity({opacity: 0, scaleX: 1, scaleY: 1}, {
                duration:225,
                queue: false,
                complete: function(){
                  backdrop.css({ visibility: 'hidden' });
                  tooltipEl.css({ visibility: 'hidden' });
                  started = false;}
              });
            }
          },225);
        }
        });
    });
  };

  var repositionWithinScreen = function(x, y, width, height) {
    var newX = x;
    var newY = y;

    if (newX < 0) {
      newX = 4;
    } else if (newX + width > window.innerWidth) {
      newX -= newX + width - window.innerWidth;
    }

    if (newY < 0) {
      newY = 4;
    } else if (newY + height > window.innerHeight + $(window).scrollTop) {
      newY -= newY + height - window.innerHeight;
    }

    return {x: newX, y: newY};
  };

  $(document).ready(function(){
     $('.tooltipped').tooltip();
   });
}( jQuery ));