Revert "Polymer elements added to third_party/polymer."

third_party/polymer/components/paper-ripple/paper-ripple.html

-<!--
-Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-Code distributed by Google as part of the polymer project is also
-subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
--->
-
-<!--
-`paper-ripple` provides a visual effect that other paper elements can
-use to simulate a rippling effect emanating from the point of contact.  The
-effect can be visualized as a concentric circle with motion.
-
-Example:
-
-    <paper-ripple></paper-ripple>
-
-`paper-ripple` listens to "down" and "up" events so it would display ripple
-effect when touches on it.  You can also defeat the default behavior and 
-manually route the down and up actions to the ripple element.  Note that it is
-important if you call downAction() you will have to make sure to call upAction()
-so that `paper-ripple` would end the animation loop.
-
-Example:
-
-    <paper-ripple id="ripple" style="pointer-events: none;"></paper-ripple>
-    ...
-    downAction: function(e) {
-      this.$.ripple.downAction({x: e.x, y: e.y});
-    },
-    upAction: function(e) {
-      this.$.ripple.upAction();
-    }
-
-Styling ripple effect:
-
-  Use CSS color property to style the ripple:
-
-    paper-ripple {
-      color: #4285f4;
-    }
-
-  Note that CSS color property is inherited so it is not required to set it on
-  the `paper-ripple` element directly.
-
-Apply `recenteringTouch` class to make the recentering rippling effect.
-
-    <paper-ripple class="recenteringTouch"></paper-ripple>
-
-Apply `circle` class to make the rippling effect within a circle.
-
-    <paper-ripple class="circle"></paper-ripple>
-
-@group Paper Elements
-@element paper-ripple
-@homepage github.io
--->
-
-<link rel="import" href="../polymer/polymer.html" >
-
-<polymer-element name="paper-ripple" attributes="initialOpacity opacityDecayVelocity">
-<template>
-
-  <style>
-
-    :host {
-      display: block;
-      position: relative;
-    }
-
-    #canvas {
-      pointer-events: none;
-      position: absolute;
-      top: 0;
-      left: 0;
-      width: 100%;
-      height: 100%;
-    }
-
-    :host(.circle) #canvas {
-      border-radius: 50%;
-    }
-
-  </style>
-
-</template>
-<script>
-
-  (function() {
-
-    var waveMaxRadius = 150;
-    //
-    // INK EQUATIONS
-    //
-    function waveRadiusFn(touchDownMs, touchUpMs, anim) {
-      // Convert from ms to s.
-      var touchDown = touchDownMs / 1000;
-      var touchUp = touchUpMs / 1000;
-      var totalElapsed = touchDown + touchUp;
-      var ww = anim.width, hh = anim.height;
-      // use diagonal size of container to avoid floating point math sadness
-      var waveRadius = Math.min(Math.sqrt(ww * ww + hh * hh), waveMaxRadius) * 1.1 + 5;
-      var duration = 1.1 - .2 * (waveRadius / waveMaxRadius);
-      var tt = (totalElapsed / duration);
-
-      var size = waveRadius * (1 - Math.pow(80, -tt));
-      return Math.abs(size);
-    }
-
-    function waveOpacityFn(td, tu, anim) {
-      // Convert from ms to s.
-      var touchDown = td / 1000;
-      var touchUp = tu / 1000;
-      var totalElapsed = touchDown + touchUp;
-
-      if (tu <= 0) {  // before touch up
-        return anim.initialOpacity;
-      }
-      return Math.max(0, anim.initialOpacity - touchUp * anim.opacityDecayVelocity);
-    }
-
-    function waveOuterOpacityFn(td, tu, anim) {
-      // Convert from ms to s.
-      var touchDown = td / 1000;
-      var touchUp = tu / 1000;
-
-      // Linear increase in background opacity, capped at the opacity
-      // of the wavefront (waveOpacity).
-      var outerOpacity = touchDown * 0.3;
-      var waveOpacity = waveOpacityFn(td, tu, anim);
-      return Math.max(0, Math.min(outerOpacity, waveOpacity));
-    }
-
-    // Determines whether the wave should be completely removed.
-    function waveDidFinish(wave, radius, anim) {
-      var waveOpacity = waveOpacityFn(wave.tDown, wave.tUp, anim);
-      // If the wave opacity is 0 and the radius exceeds the bounds
-      // of the element, then this is finished.
-      if (waveOpacity < 0.01 && radius >= Math.min(wave.maxRadius, waveMaxRadius)) {
-        return true;
-      }
-      return false;
-    };
-
-    function waveAtMaximum(wave, radius, anim) {
-      var waveOpacity = waveOpacityFn(wave.tDown, wave.tUp, anim);
-      if (waveOpacity >= anim.initialOpacity && radius >= Math.min(wave.maxRadius, waveMaxRadius)) {
-        return true;
-      }
-      return false;
-    }
-
-    //
-    // DRAWING
-    //
-    function drawRipple(ctx, x, y, radius, innerColor, outerColor) {
-      if (outerColor) {
-        ctx.fillStyle = outerColor;
-        ctx.fillRect(0,0,ctx.canvas.width, ctx.canvas.height);
-      }
-      ctx.beginPath();
-      ctx.arc(x, y, radius, 0, 2 * Math.PI, false);
-      ctx.fillStyle = innerColor;
-      ctx.fill();
-    }
-
-    //
-    // SETUP
-    //
-    function createWave(elem) {
-      var elementStyle = window.getComputedStyle(elem);
-      var fgColor = elementStyle.color;
-
-      var wave = {
-        waveColor: fgColor,
-        maxRadius: 0,
-        isMouseDown: false,
-        mouseDownStart: 0.0,
-        mouseUpStart: 0.0,
-        tDown: 0,
-        tUp: 0
-      };
-      return wave;
-    }
-
-    function removeWaveFromScope(scope, wave) {
-      if (scope.waves) {
-        var pos = scope.waves.indexOf(wave);
-        scope.waves.splice(pos, 1);
-      }
-    };
-
-    // Shortcuts.
-    var pow = Math.pow;
-    var now = Date.now;
-    if (window.performance && performance.now) {
-      now = performance.now.bind(performance);
-    }
-
-    function cssColorWithAlpha(cssColor, alpha) {
-        var parts = cssColor.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
-        if (typeof alpha == 'undefined') {
-            alpha = 1;
-        }
-        if (!parts) {
-          return 'rgba(255, 255, 255, ' + alpha + ')';
-        }
-        return 'rgba(' + parts[1] + ', ' + parts[2] + ', ' + parts[3] + ', ' + alpha + ')';
-    }
-
-    function dist(p1, p2) {
-      return Math.sqrt(pow(p1.x - p2.x, 2) + pow(p1.y - p2.y, 2));
-    }
-
-    function distanceFromPointToFurthestCorner(point, size) {
-      var tl_d = dist(point, {x: 0, y: 0});
-      var tr_d = dist(point, {x: size.w, y: 0});
-      var bl_d = dist(point, {x: 0, y: size.h});
-      var br_d = dist(point, {x: size.w, y: size.h});
-      return Math.max(tl_d, tr_d, bl_d, br_d);
-    }
-
-    Polymer('paper-ripple', {
-
-      /**
-       * The initial opacity set on the wave.
-       *
-       * @attribute initialOpacity
-       * @type number
-       * @default 0.25
-       */
-      initialOpacity: 0.25,
-
-      /**
-       * How fast (opacity per second) the wave fades out.
-       *
-       * @attribute opacityDecayVelocity
-       * @type number
-       * @default 0.8
-       */
-      opacityDecayVelocity: 0.8,
-
-      backgroundFill: true,
-      pixelDensity: 2,
-
-      eventDelegates: {
-        down: 'downAction',
-        up: 'upAction'
-      },
-
-      attached: function() {
-        // create the canvas element manually becase ios
-        // does not render the canvas element if it is not created in the
-        // main document (component templates are created in a
-        // different document). See:
-        // https://bugs.webkit.org/show_bug.cgi?id=109073.
-        if (!this.$.canvas) {
-          var canvas = document.createElement('canvas');
-          canvas.id = 'canvas';
-          this.shadowRoot.appendChild(canvas);
-          this.$.canvas = canvas;
-        }
-      },
-
-      ready: function() {
-        this.waves = [];
-      },
-
-      setupCanvas: function() {
-        this.$.canvas.setAttribute('width', this.$.canvas.clientWidth * this.pixelDensity + "px");
-        this.$.canvas.setAttribute('height', this.$.canvas.clientHeight * this.pixelDensity + "px");
-        var ctx = this.$.canvas.getContext('2d');
-        ctx.scale(this.pixelDensity, this.pixelDensity);
-        if (!this._loop) {
-          this._loop = this.animate.bind(this, ctx);
-        }
-      },
-
-      downAction: function(e) {
-        this.setupCanvas();
-        var wave = createWave(this.$.canvas);
-
-        this.cancelled = false;
-        wave.isMouseDown = true;
-        wave.tDown = 0.0;
-        wave.tUp = 0.0;
-        wave.mouseUpStart = 0.0;
-        wave.mouseDownStart = now();
-
-        var width = this.$.canvas.width / 2; // Retina canvas
-        var height = this.$.canvas.height / 2;
-        var rect = this.getBoundingClientRect();
-        var touchX = e.x - rect.left;
-        var touchY = e.y - rect.top;
-
-        wave.startPosition = {x:touchX, y:touchY};
-
-        if (this.classList.contains("recenteringTouch")) {
-          wave.endPosition = {x: width / 2,  y: height / 2};
-          wave.slideDistance = dist(wave.startPosition, wave.endPosition);
-        }
-        wave.containerSize = Math.max(width, height);
-        wave.maxRadius = distanceFromPointToFurthestCorner(wave.startPosition, {w: width, h: height});
-        this.waves.push(wave);
-        requestAnimationFrame(this._loop);
-      },
-
-      upAction: function() {
-        for (var i = 0; i < this.waves.length; i++) {
-          // Declare the next wave that has mouse down to be mouse'ed up.
-          var wave = this.waves[i];
-          if (wave.isMouseDown) {
-            wave.isMouseDown = false
-            wave.mouseUpStart = now();
-            wave.mouseDownStart = 0;
-            wave.tUp = 0.0;
-            break;
-          }
-        }
-        this._loop && requestAnimationFrame(this._loop);
-      },
-
-      cancel: function() {
-        this.cancelled = true;
-      },
-
-      animate: function(ctx) {
-        var shouldRenderNextFrame = false;
-
-        // Clear the canvas
-        ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
-
-        var deleteTheseWaves = [];
-        // The oldest wave's touch down duration
-        var longestTouchDownDuration = 0;
-        var longestTouchUpDuration = 0;
-        // Save the last known wave color
-        var lastWaveColor = null;
-        // wave animation values
-        var anim = {
-          initialOpacity: this.initialOpacity,
-          opacityDecayVelocity: this.opacityDecayVelocity,
-          height: ctx.canvas.height,
-          width: ctx.canvas.width
-        }
-
-        for (var i = 0; i < this.waves.length; i++) {
-          var wave = this.waves[i];
-
-          if (wave.mouseDownStart > 0) {
-            wave.tDown = now() - wave.mouseDownStart;
-          }
-          if (wave.mouseUpStart > 0) {
-            wave.tUp = now() - wave.mouseUpStart;
-          }
-
-          // Determine how long the touch has been up or down.
-          var tUp = wave.tUp;
-          var tDown = wave.tDown;
-          longestTouchDownDuration = Math.max(longestTouchDownDuration, tDown);
-          longestTouchUpDuration = Math.max(longestTouchUpDuration, tUp);
-
-          // Obtain the instantenous size and alpha of the ripple.
-          var radius = waveRadiusFn(tDown, tUp, anim);
-          var waveAlpha =  waveOpacityFn(tDown, tUp, anim);
-          var waveColor = cssColorWithAlpha(wave.waveColor, waveAlpha);
-          lastWaveColor = wave.waveColor;
-
-          // Position of the ripple.
-          var x = wave.startPosition.x;
-          var y = wave.startPosition.y;
-
-          // Ripple gravitational pull to the center of the canvas.
-          if (wave.endPosition) {
-
-            // This translates from the origin to the center of the view  based on the max dimension of  
-            var translateFraction = Math.min(1, radius / wave.containerSize * 2 / Math.sqrt(2) );
-
-            x += translateFraction * (wave.endPosition.x - wave.startPosition.x);
-            y += translateFraction * (wave.endPosition.y - wave.startPosition.y);
-          }
-
-          // If we do a background fill fade too, work out the correct color.
-          var bgFillColor = null;
-          if (this.backgroundFill) {
-            var bgFillAlpha = waveOuterOpacityFn(tDown, tUp, anim);
-            bgFillColor = cssColorWithAlpha(wave.waveColor, bgFillAlpha);
-          }
-
-          // Draw the ripple.
-          drawRipple(ctx, x, y, radius, waveColor, bgFillColor);
-
-          // Determine whether there is any more rendering to be done.
-          var maximumWave = waveAtMaximum(wave, radius, anim);
-          var waveDissipated = waveDidFinish(wave, radius, anim);
-          var shouldKeepWave = !waveDissipated || maximumWave;
-          var shouldRenderWaveAgain = !waveDissipated && !maximumWave;
-          shouldRenderNextFrame = shouldRenderNextFrame || shouldRenderWaveAgain;
-          if (!shouldKeepWave || this.cancelled) {
-            deleteTheseWaves.push(wave);
-          }
-       }
-
-        if (shouldRenderNextFrame) {
-          requestAnimationFrame(this._loop);
-        }
-
-        for (var i = 0; i < deleteTheseWaves.length; ++i) {
-          var wave = deleteTheseWaves[i];
-          removeWaveFromScope(this, wave);
-        }
-
-        if (!this.waves.length) {
-          // If there is nothing to draw, clear any drawn waves now because
-          // we're not going to get another requestAnimationFrame any more.
-          ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
-          this._loop = null;
-        }
-      }
-
-    });
-
-  })();
-
-</script>
-</polymer-element>