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src/components/input-number/input-number.vue 6.98 KB
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  <template>
      <div :class="wrapClasses">
          <div :class="handlerClasses">
              <a
                  @click="up"
                  @mouse.down="preventDefault"
                  :class="upClasses">
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                  <span :class="innerUpClasses" @click="preventDefault"></span>
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              </a>
              <a
                  @click="down"
                  @mouse.down="preventDefault"
                  :class="downClasses">
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                  <span :class="innerDownClasses" @click="preventDefault"></span>
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              </a>
          </div>
          <div :class="inputWrapClasses">
              <input
                  :class="inputClasses"
                  :disabled="disabled"
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                  autocomplete="off"
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                  @focus="focus"
                  @blur="blur"
                  @keydown.stop="keyDown"
                  @change="change"
                  :value="value">
          </div>
      </div>
  </template>
  <script>
      import { oneOf } from '../../utils/assist';
  
      const prefixCls = 'ivu-input-number';
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      const iconPrefixCls = 'ivu-icon';
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      function isValueNumber (value) {
          return (/(^-?[0-9]+\.{1}\d+$)|(^-?[1-9][0-9]*$)/).test(value + '');
      }
      function addNum (num1, num2) {
          var sq1, sq2, m;
          try {
              sq1 = num1.toString().split(".")[1].length;
          }
          catch (e) {
              sq1 = 0;
          }
          try {
              sq2 = num2.toString().split(".")[1].length;
          }
          catch (e) {
              sq2 = 0;
          }
  //        if (sq1 === 0 || sq2 === 0) {
  //            return num1 + num2;
  //        } else {
  //            m = Math.pow(10, Math.max(sq1, sq2));
  //            return (num1 * m + num2 * m) / m;
  //        }
          m = Math.pow(10, Math.max(sq1, sq2));
          return (num1 * m + num2 * m) / m;
      }
  
      export default {
          props: {
              max: {
                  type: Number,
                  default: Infinity
              },
              min: {
                  type: Number,
                  default: -Infinity
              },
              step: {
                  type: Number,
                  default: 1
              },
              value: {
                  type: Number,
                  default: 1
              },
              size: {
                  validator (value) {
                      return oneOf(value, ['small', 'large']);
                  }
              },
              disabled: {
                  type: Boolean,
                  default: false
              }
          },
          data () {
              return {
                  focused: false,
                  upDisabled: false,
                  downDisabled: false
              }        
          },
          computed: {
              wrapClasses () {
                  return [
                      `${prefixCls}`,
                      {
                          [`${prefixCls}-${this.size}`]: !!this.size,
                          [`${prefixCls}-disabled`]: this.disabled,
                          [`${prefixCls}-focused`]: this.focused
                      }
                  ]
              },
              handlerClasses () {
                  return `${prefixCls}-handler-wrap`;
              },
              upClasses () {
                  return [
                      `${prefixCls}-handler`,
                      `${prefixCls}-handler-up`,
                      {
                          [`${prefixCls}-handler-up-disabled`]: this.upDisabled
                      }
                  ]
              },
              innerUpClasses () {
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                  return `${prefixCls}-handler-up-inner ${iconPrefixCls} ${iconPrefixCls}-ios-arrow-up`;
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              },
              downClasses () {
                  return [
                      `${prefixCls}-handler`,
                      `${prefixCls}-handler-down`,
                      {
                          [`${prefixCls}-handler-down-disabled`]: this.downDisabled
                      }
                  ]
              },
              innerDownClasses () {
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                  return `${prefixCls}-handler-down-inner ${iconPrefixCls} ${iconPrefixCls}-ios-arrow-down`;
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              },
              inputWrapClasses () {
                  return `${prefixCls}-input-wrap`;
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              },
              inputClasses () {
                  return `${prefixCls}-input`;
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              }
          },
          methods: {
              preventDefault (e) {
                  e.preventDefault();
              },
              up () {
                  if (this.upDisabled) {
                      return false;
                  }
                  this.changeStep('up');
              },
              down () {
                  if (this.downDisabled) {
                      return false;
                  }
                  this.changeStep('down');
              },
              changeStep (type) {
                  if (this.disabled) {
                      return false;
                  }
  
                  let val = Number(this.value);
                  const step = Number(this.step);
                  if (isNaN(val)) {
                      return false;
                  }
  
                  if (type == 'up') {
                      val = addNum(val, step);
                  } else if (type == 'down') {
                      val = addNum(val, -step);
                  }
                  this.setValue(val);
              },
              setValue (val) {
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                  this.$nextTick(() => {
                      this.value = val;
                  });
  
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                  this.$emit('on-change', val);
              },
              focus () {
                  this.focused = true;
              },
              blur () {
                  this.focused = false;
              },
              keyDown (e) {
                  if (e.keyCode === 38) {
                      e.preventDefault();
                      this.up()
                  } else if (e.keyCode === 40) {
                      e.preventDefault();
                      this.down()
                  }
              },
              change (event) {
                  let val = event.target.value.trim();
  
                  const max = this.max;
                  const min = this.min;
  
                  if (isValueNumber(val)) {
                      val = Number(val);
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                      this.value = val;
  
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                      if (val > max) {
                          this.setValue(max);
                      } else if (val < min) {
                          this.setValue(min);
                      } else {
                          this.setValue(val);
                      }
                  } else {
                      event.target.value = this.value;
                  }
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              },
              changeVal (val) {
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                  if (isValueNumber(val) || val === 0) {
                      val = Number(val);
                      const step = this.step;
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                      this.upDisabled = val + step > this.max;
                      this.downDisabled = val - step < this.min;
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                  } else {
                      this.upDisabled = true;
                      this.downDisabled = true;
                  }
              }
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          },
          ready () {
              this.changeVal(this.value);
          },
          watch: {
              value (val) {
                  this.changeVal(val);
              }
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          }
      }
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  </script>