hyper/lib/components/tab.tsx

import React, {useEffect, useRef} from 'react';

import type {TabProps} from '../../typings/hyper';

const Tab = (props: TabProps) => {
  const handleClick = (event: React.MouseEvent) => {
    const isLeftClick = event.nativeEvent.which === 1;

    if (isLeftClick && !props.isActive) {
      props.onSelect();
    }
  };

  const handleMouseUp = (event: React.MouseEvent) => {
    const isMiddleClick = event.nativeEvent.which === 2;

    if (isMiddleClick) {
      props.onClose();
    }
  };

  const ref = useRef<HTMLLIElement>(null);

  useEffect(() => {
    if (props.lastFocused) {
      ref?.current?.scrollIntoView({
        behavior: 'smooth'
      });
    }
  }, [props.lastFocused]);

  const {isActive, isFirst, isLast, borderColor, hasActivity} = props;

  return (
    <>
      <li
        onClick={props.onClick}
        style={{borderColor}}
        className={`tab_tab ${isFirst ? 'tab_first' : ''} ${isActive ? 'tab_active' : ''} ${
          isFirst && isActive ? 'tab_firstActive' : ''
        } ${hasActivity ? 'tab_hasActivity' : ''}`}
        ref={ref}
      >
        {props.customChildrenBefore}
        <span
          className={`tab_text ${isLast ? 'tab_textLast' : ''} ${isActive ? 'tab_textActive' : ''}`}
          onClick={handleClick}
          onMouseUp={handleMouseUp}
        >
          <span title={props.text} className="tab_textInner">
            {props.text}
          </span>
        </span>
        <i className="tab_icon" onClick={props.onClose}>
          <svg className="tab_shape">
            <use xlinkHref="./renderer/assets/icons.svg#close-tab" />
          </svg>
        </i>
        {props.customChildren}
      </li>

      <style jsx>{`
        .tab_tab {
          color: #ccc;
          border-color: #ccc;
          border-bottom-width: 1px;
          border-bottom-style: solid;
          border-left-width: 1px;
          border-left-style: solid;
          list-style-type: none;
          flex-grow: 1;
          position: relative;
          min-width: 10em;
        }

        .tab_tab:hover {
          color: #ccc;
        }

        .tab_first {
          border-left-width: 0;
          padding-left: 1px;
        }

        .tab_firstActive {
          border-left-width: 1px;
          padding-left: 0;
        }

        .tab_active {
          color: #fff;
          border-bottom-width: 0;
        }
        .tab_active:hover {
          color: #fff;
        }

        .tab_hasActivity {
          color: #50e3c2;
        }

        .tab_hasActivity:hover {
          color: #50e3c2;
        }

        .tab_text {
          transition: color 0.2s ease;
          height: 34px;
          display: block;
          width: 100%;
          position: relative;
          overflow: hidden;
        }

        .tab_textInner {
          position: absolute;
          left: 24px;
          right: 24px;
          top: 0;
          bottom: 0;
          text-align: center;
          text-overflow: ellipsis;
          white-space: nowrap;
          overflow: hidden;
        }

        .tab_icon {
          transition:
            opacity 0.2s ease,
            color 0.2s ease,
            transform 0.25s ease,
            background-color 0.1s ease;
          pointer-events: none;
          position: absolute;
          right: 7px;
          top: 10px;
          display: inline-block;
          width: 14px;
          height: 14px;
          border-radius: 100%;
          color: #e9e9e9;
          opacity: 0;
          transform: scale(0.95);
        }

        .tab_icon:hover {
          background-color: rgba(255, 255, 255, 0.13);
          color: #fff;
        }

        .tab_icon:active {
          background-color: rgba(255, 255, 255, 0.1);
          color: #909090;
        }

        .tab_tab:hover .tab_icon {
          opacity: 1;
          transform: none;
          pointer-events: all;
        }

        .tab_shape {
          position: absolute;
          left: 4px;
          top: 4px;
          width: 6px;
          height: 6px;
          vertical-align: middle;
          fill: currentColor;
          shape-rendering: crispEdges;
        }
      `}</style>
    </>
  );
};

Tab.displayName = 'Tab';

export default Tab;