iuap-design/js/ripple.js

UI Framework Used For Enterprise.

  var URipple = function URipple(element) {
    if (u.isIE8) return; 
    this._element = element;

    // Initialize instance.
    this.init();
  };
  //window['URipple'] = URipple;

  URipple.prototype._down = function(event) {
    if (u.isIE8) return; 
    if (!this._rippleElement.style.width && !this._rippleElement.style.height) {
      var rect = this._element.getBoundingClientRect();
      this.rippleSize_ = Math.sqrt(rect.width * rect.width + rect.height * rect.height) * 2 + 2;
      this._rippleElement.style.width = this.rippleSize_ + 'px';
      this._rippleElement.style.height = this.rippleSize_ + 'px';
    }

    u.addClass(this._rippleElement, 'is-visible');

    if (event.type === 'mousedown' && this._ignoringMouseDown) {
      this._ignoringMouseDown = false;
    } else {
      if (event.type === 'touchstart') {
        this._ignoringMouseDown = true;
      }
      var frameCount = this.getFrameCount();
      if (frameCount > 0) {
        return;
      }
      this.setFrameCount(1);
      var t = event.currentTarget || event.target || event.srcElement;
      var bound = t.getBoundingClientRect();
      var x;
      var y;
      // Check if we are handling a keyboard click.
      if (event.clientX === 0 && event.clientY === 0) {
        x = Math.round(bound.width / 2);
        y = Math.round(bound.height / 2);
      } else {
        var clientX = event.clientX ? event.clientX : event.touches[0].clientX;
        var clientY = event.clientY ? event.clientY : event.touches[0].clientY;
        x = Math.round(clientX - bound.left);
        y = Math.round(clientY - bound.top);
      }
      this.setRippleXY(x, y);
      this.setRippleStyles(true);
      if(window.requestAnimationFrame)
        window.requestAnimationFrame(this.animFrameHandler.bind(this));
    }
  };

  /**
   * Handle mouse / finger up on element.
   *
   * @param {Event} event The event that fired.
   * @private
   */
  URipple.prototype._up = function(event) {
    if (u.isIE8) return; 
    var self = this;
    // Don't fire for the artificial "mouseup" generated by a double-click.
    if (event && event.detail !== 2) {
      u.removeClass(this._rippleElement,'is-visible')
    }
    // Allow a repaint to occur before removing this class, so the animation
    // shows for tap events, which seem to trigger a mouseup too soon after
    // mousedown.
    window.setTimeout(function() {
      u.removeClass(self._rippleElement,'is-visible')
    }, 0);
  };

  /**
       * Getter for frameCount_.
       * @return {number} the frame count.
       */
  URipple.prototype.getFrameCount = function() {
    if (u.isIE8) return; 
    return this.frameCount_;
  };
  /**
       * Setter for frameCount_.
       * @param {number} fC the frame count.
       */
  URipple.prototype.setFrameCount = function(fC) {
    if (u.isIE8) return; 
    this.frameCount_ = fC;
  };


  /**
       * Getter for _rippleElement.
       * @return {Element} the ripple element.
       */
      URipple.prototype.getRippleElement = function() {
        if (u.isIE8) return; 
        return this._rippleElement;
      };

      /**
       * Sets the ripple X and Y coordinates.
       * @param  {number} newX the new X coordinate
       * @param  {number} newY the new Y coordinate
       */
      URipple.prototype.setRippleXY = function(newX, newY) {
        if (u.isIE8) return; 
        this.x_ = newX;
        this.y_ = newY;
      };

      /**
       * Sets the ripple styles.
       * @param  {boolean} start whether or not this is the start frame.
       */
      URipple.prototype.setRippleStyles = function(start) {
        if (u.isIE8) return; 
        if (this._rippleElement !== null) {
          var transformString;
          var scale;
          var size;
          var offset = 'translate(' + this.x_ + 'px, ' + this.y_ + 'px)';

          if (start) {
            scale = 'scale(0.0001, 0.0001)';
            size = '1px';
          } else {
            scale = '';
            size = this.rippleSize_ + 'px';
          }

          transformString = 'translate(-50%, -50%) ' + offset + scale;

          this._rippleElement.style.webkitTransform = transformString;
          this._rippleElement.style.msTransform = transformString;
          this._rippleElement.style.transform = transformString;

          if (start) {
            u.removeClass(this._rippleElement,'is-animating')
          } else {
            u.addClass(this._rippleElement,'is-animating')
          }
        }
      };

    /**
       * Handles an animation frame.
       */
      URipple.prototype.animFrameHandler = function() {
        if (u.isIE8) return; 
        if (this.frameCount_-- > 0) {
          window.requestAnimationFrame(this.animFrameHandler.bind(this));
        } else {
          this.setRippleStyles(false);
        }
      };

  /**
   * Initialize element.
   */
  URipple.prototype.init = function() {
    if (u.isIE8) return; 
    var self = this;
    if (this._element) {
      this._rippleElement = this._element.querySelector('.u-ripple');
      if (!this._rippleElement){
        this._rippleElement = document.createElement('span');
        u.addClass(this._rippleElement,'u-ripple');
        this._element.appendChild(this._rippleElement);
        this._element.style.overflow = 'hidden';
        this._element.style.position = 'relative';
      }
      this.frameCount_ = 0;
      this.rippleSize_ = 0;
      this.x_ = 0;
      this.y_ = 0;

      // Touch start produces a compat mouse down event, which would cause a
      // second ripples. To avoid that, we use this property to ignore the first
      // mouse down after a touch start.
      this._ignoringMouseDown = false;
      u.on(this._element, 'mousedown',function(e){self._down(e);})
      u.on(this._element, 'touchstart',function(e){self._down(e);})

      u.on(this._element, 'mouseup',function(e){self._up(e);})
      u.on(this._element, 'mouseleave',function(e){self._up(e);})
      u.on(this._element, 'touchend',function(e){self._up(e);})
      u.on(this._element, 'blur',function(e){self._up(e);})
    }
  };

  u.Ripple = URipple;