fix: support decimal step

refactor: improve performance

README.md

@@ -88,11 +88,17 @@ ReactDOM.render(<Rcslider />, container);
           <td>100</td>
           <td>The maximum value of the slider</td>
         </tr>
+        <tr>
+          <td>marks</td>
+          <td>object {number: string}</td>
+          <td>{}</td>
+          <td>Mark on the slider. The key determines the position, and the value determines what will show.</td>
+        </tr>
         <tr>
           <td>step</td>
-          <td>number</td>
+          <td>number or `null`</td>
           <td>1</td>
-          <td>Value to be added or subtracted on each step the slider makes. Must be greater than zero. max - min should be evenly divisible by the step value.</td>
+          <td>Value to be added or subtracted on each step the slider makes. Must be greater than zero. max - min should be evenly divisible by the step value. When `marks` is not an empty object, `step` can be set to `null`, to make marks as steps.</td>
         </tr>
         <tr>
           <td>range</td>
@@ -112,35 +118,17 @@ ReactDOM.render(<Rcslider />, container);
           <td></td>
           <td>Set current positions of handles. If range is `false`, the type of `defaultValue` should be `number`. Otherwise, `[number, number]`</td>
         </tr>
-        <tr>
-          <td>marks</td>
-          <td>array</td>
-          <td>[]</td>
-          <td>Mark every step for the slider, it will ignore the `step` parameter if it has been defined. Does not work with `range`</td>
-        </tr>
         <tr>
           <td>included</td>
           <td>boolean</td>
           <td>true</td>
           <td>If the value is `true`, it means a continuous value interval, otherwise, it is a independent value.</td>
         </tr>
-        <tr>
-          <td>defaultIndex</td>
-          <td>number</td>
-          <td>0</td>
-          <td>For step or marks slider, determines the initial position of the handle. Does not work with `range`</td>
-        </tr>
-        <tr>
-          <td>index</td>
-          <td>number</td>
-          <td></td>
-          <td>For step or marks slider, determines current position of the handle. Does not work with `range`</td>
-        </tr>
         <tr>
           <td>disabled</td>
           <td>boolean</td>
           <td>false</td>
-          <td>If true the handles can't be moved.</td>
+          <td>If `true`, handles can't be moved.</td>
         </tr>
         <tr>
           <td>tipTransitionName</td>
@@ -150,7 +138,7 @@ ReactDOM.render(<Rcslider />, container);
         </tr>
         <tr>
           <td>tipFormatter</td>
-          <td>func</td>
+          <td>function</td>
           <td></td>
           <td>Format the value of the tooltip if it shows.</td>
         </tr>
@@ -158,7 +146,7 @@ ReactDOM.render(<Rcslider />, container);
           <td>dots</td>
           <td>bool</td>
           <td>false</td>
-          <td>For linear slider, when the `step` value is greater than 1, you can set the `dots` to  `true` if you want to render the slider bar with dots.</td>
+          <td>When the `step` value is greater than 1, you can set the `dots` to  `true` if you want to render the slider with dots.</td>
         </tr>
     </tbody>
 </table>

examples/marks.js

@@ -8,6 +8,7 @@ var Slider = require('rc-slider');
 
 var style = {width: 400, margin: 50};
 var marks = {
+  '-10': '-10°C',
   0: '0°C',
   26: '26°C',
   37: '37°C',
@@ -21,30 +22,30 @@ var log = function(value) {
 ReactDOM.render(
   <div>
     <div style={style}>
-      <p>Slider with marks, `included=true`</p>
-      <Slider marks={marks} onChange={log} defaultValue={20} />
+      <p>Slider with marks, `step=null`</p>
+      <Slider min={-10} marks={marks} step={null} onChange={log} defaultValue={20} />
     </div>
     <div style={style}>
-      <p>Slider with marks and steps, `included=true`</p>
-      <Slider marks={marks} step={10} onChange={log} defaultValue={20} />
+      <p>Slider with marks and steps</p>
+      <Slider min={-10} marks={marks} step={10} onChange={log} defaultValue={20} />
     </div>
 
     <div style={style}>
       <p>Slider with marks, `included=false`</p>
-      <Slider marks={marks} included={false} defaultValue={20} />
+      <Slider min={-10} marks={marks} included={false} defaultValue={20} />
     </div>
     <div style={style}>
       <p>Slider with marks and steps, `included=false`</p>
-      <Slider marks={marks} step={10} included={false} defaultValue={20} />
+      <Slider min={-10} marks={marks} step={10} included={false} defaultValue={20} />
     </div>
 
     <div style={style}>
       <p>Range with marks</p>
-    <Slider range marks={marks} onChange={log} defaultValue={[20, 40]} />
+      <Slider min={-10} range marks={marks} onChange={log} defaultValue={[20, 40]} />
     </div>
     <div style={style}>
       <p>Range with marks and steps</p>
-      <Slider range marks={marks} step={10} onChange={log} defaultValue={[20, 40]} />
+      <Slider min={-10} range marks={marks} step={10} onChange={log} defaultValue={[20, 40]} />
     </div>
   </div>
   , document.getElementById('__react-content'));

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rc-slider",
-  "version": "3.0.0",
+  "version": "3.1.2",
   "description": "slider ui component for react",
   "keywords": [
     "react",

src/Dots.jsx

@@ -0,0 +1,33 @@
+import React from 'react';
+import { classSet } from 'rc-util';
+
+function calcPoints(marks, dots, step, min, max) {
+  const points = Object.keys(marks).map(parseFloat);
+  if (dots) {
+    for (let i = min; i <= max; i = i + step) {
+      points.push(i);
+    }
+  }
+  return points;
+}
+
+const Dots = ({prefixCls, marks, dots, step, included, lowerBound, upperBound, max, min}) => {
+  const range = max - min;
+  const elements = calcPoints(marks, dots, step, min, max).map((point) => {
+    const offset = (point - min) / range * 100 + '%';
+    const style = { left: offset };
+
+    const isActived = (!included && point === upperBound) ||
+            (included && point <= upperBound && point >= lowerBound);
+    const pointClassName = classSet({
+      [prefixCls + '-dot']: true,
+      [prefixCls + '-dot-active']: isActived,
+    });
+
+    return <span className={pointClassName} style={style} key={point} />;
+  });
+
+  return <div className={prefixCls + '-step'}>{elements}</div>;
+};
+
+export default Dots;

src/Marks.jsx

@@ -5,7 +5,7 @@ const Marks = ({className, marks, included, upperBound, lowerBound, max, min}) =
   const marksKeys = Object.keys(marks);
   const marksCount = marksKeys.length;
   const unit = 100 / (marksCount - 1);
-  const markWidth = unit / 2 + '%';
+  const markWidth = unit * 0.9;
 
   const range = max - min;
   const elements = marksKeys.map(parseFloat).map((point) => {
@@ -16,14 +16,8 @@ const Marks = ({className, marks, included, upperBound, lowerBound, max, min}) =
       [className + '-text-active']: isActived,
     });
 
-    const style = { width: markWidth };
-    if (point === marksCount - 1) {
-      style.right = -unit / 4 + '%';
-    } else if (point === 0) {
-      style.left = -unit / 4 + '%';
-    } else {
-      style.left = (point - min) / range * 100 - unit / 4 + '%';
-    }
+    const style = { width: markWidth + '%' };
+    style.left = (point - min) / range * 100 - markWidth / 2 + '%';
 
     return (<span className={markClassName} style={style} key={point}>
              {marks[point]}

src/Slider.jsx

@@ -2,7 +2,7 @@ import React from 'react';
 import {Dom as DomUtils, classSet} from 'rc-util';
 import Track from './Track';
 import Handle from './Handle';
-import Steps from './Steps';
+import Dots from './Dots';
 import Marks from './Marks';
 
 function noop() {
@@ -25,10 +25,6 @@ function pauseEvent(e) {
   e.preventDefault();
 }
 
-function isEmpty(collection) {
-  return Object.keys(collection).length === 0;
-}
-
 class Slider extends React.Component {
   constructor(props) {
     super(props);
@@ -191,17 +187,6 @@ class Slider extends React.Component {
     return this.props.range ? [lowerBound, upperBound] : upperBound;
   }
 
-  getPoints() {
-    const {marks, step, min, max} = this.props;
-    const points = Object.keys(marks);
-    if (isEmpty(marks) || step > 1) {
-      for (let i = min; i <= max; i = i + step) {
-        points.push(i);
-      }
-    }
-    return points;
-  }
-
   getSliderLength() {
     const slider = this.refs.slider;
     if (!slider) {
@@ -218,10 +203,20 @@ class Slider extends React.Component {
     return rect.left;
   }
 
+  getPrecision() {
+    const props = this.props;
+    const stepString = props.step.toString();
+    let precision = 0;
+    if (stepString.indexOf('.') >= 0) {
+      precision = stepString.length - stepString.indexOf('.') - 1;
+    }
+    return precision;
+  }
+
   trimAlignValue(v) {
     const state = this.state || {};
     const {handle, lowerBound, upperBound} = state;
-    const {min, max} = this.props;
+    const {marks, step, min, max} = this.props;
 
     let val = v;
     if (val <= min) {
@@ -237,11 +232,16 @@ class Slider extends React.Component {
       val = upperBound;
     }
 
-    const points = this.getPoints().map(parseFloat);
+    const points = Object.keys(marks).map(parseFloat);
+    if (step !== null) {
+      const closestStep = Math.round(val / step) * step;
+      points.push(closestStep);
+    }
+
     const diffs = points.map((point) => Math.abs(val - point));
     const closestPoint = points[diffs.indexOf(Math.min.apply(Math, diffs))];
 
-    return closestPoint;
+    return step !== null ? parseFloat(closestPoint.toFixed(this.getPrecision())) : closestPoint;
   }
 
   calcOffset(value) {
@@ -273,7 +273,7 @@ class Slider extends React.Component {
     }
   }
 
-  removeEventons(type) {
+  removeEvents(type) {
     if (type === 'touch') {
       this.onTouchMoveListener.remove();
       this.onTouchUpListener.remove();
@@ -284,54 +284,50 @@ class Slider extends React.Component {
   }
 
   end(type) {
-    this.removeEventons(type);
+    this.removeEvents(type);
     this.props.onAfterChange(this.getValue());
     this.setState({handle: null});
   }
 
   render() {
     const {handle, upperBound, lowerBound} = this.state;
-    const {className, prefixCls, disabled, dots, included, range,
+    const {className, prefixCls, disabled, dots, included, range, step,
            marks, max, min, tipTransitionName, tipFormatter, children} = this.props;
-    const marksCount = Object.keys(marks).length;
+
+    const upperOffset = this.calcOffset(upperBound);
+    const lowerOffset = this.calcOffset(lowerBound);
+
+    const handleClassName = prefixCls + '-handle';
+    const isNoTip = (step === null) && !tipFormatter;
+
+    const upper = (<Handle className={handleClassName}
+                           noTip={isNoTip} tipTransitionName={tipTransitionName} tipFormatter={tipFormatter}
+                           offset={upperOffset} value={upperBound} dragging={handle === 'upperBound'} />);
+
+    let lower = null;
+    if (range) {
+      lower = (<Handle className={handleClassName}
+                       noTip={isNoTip} tipTransitionName={tipTransitionName} tipFormatter={tipFormatter}
+                       offset={lowerOffset} value={lowerBound} dragging={handle === 'lowerBound'} />);
+    }
 
     const sliderClassName = classSet({
       [prefixCls]: true,
       [prefixCls + '-disabled']: disabled,
       [className]: !!className,
     });
-
-    const upperOffset = this.calcOffset(upperBound);
-    const lowerOffset = this.calcOffset(lowerBound);
-
-    let track = null;
-    if (included || range) {
-      const trackClassName = prefixCls + '-track';
-      track = <Track className={trackClassName} offset={lowerOffset} length={upperOffset - lowerOffset}/>;
-    }
-
-    const handleClassName = prefixCls + '-handle';
-    const isNoTip = (marksCount > 0) && !tipFormatter;
-    const upper = (<Handle className={handleClassName} tipTransitionName={tipTransitionName} noTip={isNoTip} tipFormatter={tipFormatter}
-                     offset={upperOffset} value={upperBound} dragging={handle === 'upperBound'} />);
-
-    let lower = null;
-    if (range) {
-      lower = (<Handle className={handleClassName} tipTransitionName={tipTransitionName} noTip={isNoTip} tipFormatter={tipFormatter}
-                 offset={lowerOffset} value={lowerBound} dragging={handle === 'lowerBound'} />);
-    }
-
     const isIncluded = included || range;
     return (
       <div ref="slider" className={sliderClassName}
            onTouchStart={disabled ? noop : this.onTouchStart.bind(this)}
            onMouseDown={disabled ? noop : this.onMouseDown.bind(this)}>
-        {track}
         {upper}
         {lower}
-        <Steps prefixCls={prefixCls} points={this.getPoints()} dots={dots}
-               included={isIncluded} lowerBound={lowerBound}
-               upperBound={upperBound} max={max} min={min} />
+        <Track className={prefixCls + '-track'} included={isIncluded}
+               offset={lowerOffset} length={upperOffset - lowerOffset}/>
+        <Dots prefixCls={prefixCls} marks={marks} dots={dots} step={step}
+              included={isIncluded} lowerBound={lowerBound}
+              upperBound={upperBound} max={max} min={min} />
         <Marks className={prefixCls + '-mark'} marks={marks}
                included={isIncluded} lowerBound={lowerBound}
                upperBound={upperBound} max={max} min={min} />

src/Steps.jsx

@@ -1,24 +0,0 @@
-import React from 'react';
-import { classSet } from 'rc-util';
-
-const Steps = ({prefixCls, points, dots, included, lowerBound, upperBound, max, min}) => {
-  const range = max - min;
-  const elements = points.filter((point) => typeof point === 'string' || dots).map(parseFloat)
-          .map((point) => {
-            const offset = (point - min) / range * 100 + '%';
-            const style = { left: offset };
-
-            const isActived = (!included && point === upperBound) ||
-                    (included && point <= upperBound && point >= lowerBound);
-            const pointClassName = classSet({
-              [prefixCls + '-dot']: true,
-              [prefixCls + '-dot-active']: isActived,
-            });
-
-            return <span className={pointClassName} style={style} key={point} />;
-          });
-
-  return <div className={prefixCls + '-step'}>{elements}</div>;
-};
-
-export default Steps;

src/Track.jsx

@@ -1,9 +1,10 @@
 import React from 'react';
 
-const Track = ({className, offset, length}) => {
+const Track = ({className, included, offset, length}) => {
   const style = {
     left: offset + '%',
     width: length + '%',
+    visibility: included ? 'visible' : 'hidden',
   };
   return <div className={className} style={style} />;
 };