@wordpress/components/build-module/custom-gradient-bar/control-points.js

UI components for WordPress.

import _extends from "@babel/runtime/helpers/esm/extends";
import { createElement, Fragment } from "@wordpress/element";

/**
 * External dependencies
 */
import classnames from 'classnames';
/**
 * WordPress dependencies
 */

import { useInstanceId } from '@wordpress/compose';
import { useEffect, useRef, useState } from '@wordpress/element';
import { __, sprintf } from '@wordpress/i18n';
import { plus } from '@wordpress/icons';
/**
 * Internal dependencies
 */

import Button from '../button';
import ColorPicker from '../color-picker';
import Dropdown from '../dropdown';
import KeyboardShortcuts from '../keyboard-shortcuts';
import VisuallyHidden from '../visually-hidden';
import { addControlPoint, clampPercent, removeControlPoint, updateControlPointColor, updateControlPointColorByPosition, updateControlPointPosition, getHorizontalRelativeGradientPosition } from './utils';
import { COLOR_POPOVER_PROPS, GRADIENT_MARKERS_WIDTH, MINIMUM_SIGNIFICANT_MOVE, KEYBOARD_CONTROL_POINT_VARIATION } from './constants';

function ControlPointKeyboardMove({
  value: position,
  onChange,
  children
}) {
  const shortcuts = {
    right(event) {
      // Stop propagation of the key press event to avoid focus moving
      // to another editor area.
      event.stopPropagation();
      const newPosition = clampPercent(position + KEYBOARD_CONTROL_POINT_VARIATION);
      onChange(newPosition);
    },

    left(event) {
      // Stop propagation of the key press event to avoid focus moving
      // to another editor area.
      event.stopPropagation();
      const newPosition = clampPercent(position - KEYBOARD_CONTROL_POINT_VARIATION);
      onChange(newPosition);
    }

  };
  return createElement(KeyboardShortcuts, {
    shortcuts: shortcuts
  }, children);
}

function ControlPointButton({
  isOpen,
  position,
  color,
  onChange,
  ...additionalProps
}) {
  const instanceId = useInstanceId(ControlPointButton);
  const descriptionId = `components-custom-gradient-picker__control-point-button-description-${instanceId}`;
  return createElement(ControlPointKeyboardMove, {
    value: position,
    onChange: onChange
  }, createElement(Button, _extends({
    "aria-label": sprintf( // translators: %1$s: gradient position e.g: 70, %2$s: gradient color code e.g: rgb(52,121,151).
    __('Gradient control point at position %1$s%% with color code %2$s.'), position, color),
    "aria-describedby": descriptionId,
    "aria-haspopup": "true",
    "aria-expanded": isOpen,
    className: classnames('components-custom-gradient-picker__control-point-button', {
      'is-active': isOpen
    }),
    style: {
      left: `${position}%`
    }
  }, additionalProps)), createElement(VisuallyHidden, {
    id: descriptionId
  }, __('Use your left or right arrow keys or drag and drop with the mouse to change the gradient position. Press the button to change the color or remove the control point.')));
}

function ControlPoints({
  disableRemove,
  disableAlpha,
  gradientPickerDomRef,
  ignoreMarkerPosition,
  value: controlPoints,
  onChange,
  onStartControlPointChange,
  onStopControlPointChange
}) {
  const controlPointMoveState = useRef();

  const onMouseMove = event => {
    const relativePosition = getHorizontalRelativeGradientPosition(event.clientX, gradientPickerDomRef.current, GRADIENT_MARKERS_WIDTH);
    const {
      initialPosition,
      index,
      significantMoveHappened
    } = controlPointMoveState.current;

    if (!significantMoveHappened && Math.abs(initialPosition - relativePosition) >= MINIMUM_SIGNIFICANT_MOVE) {
      controlPointMoveState.current.significantMoveHappened = true;
    }

    onChange(updateControlPointPosition(controlPoints, index, relativePosition));
  };

  const cleanEventListeners = () => {
    if (window && window.removeEventListener && controlPointMoveState.current && controlPointMoveState.current.listenersActivated) {
      window.removeEventListener('mousemove', onMouseMove);
      window.removeEventListener('mouseup', cleanEventListeners);
      onStopControlPointChange();
      controlPointMoveState.current.listenersActivated = false;
    }
  };

  useEffect(() => {
    return () => {
      cleanEventListeners();
    };
  }, []);
  return controlPoints.map((point, index) => {
    const initialPosition = point === null || point === void 0 ? void 0 : point.position;
    return ignoreMarkerPosition !== initialPosition && createElement(Dropdown, {
      key: index,
      onClose: onStopControlPointChange,
      renderToggle: ({
        isOpen,
        onToggle
      }) => createElement(ControlPointButton, {
        key: index,
        onClick: () => {
          if (controlPointMoveState.current && controlPointMoveState.current.significantMoveHappened) {
            return;
          }

          if (isOpen) {
            onStopControlPointChange();
          } else {
            onStartControlPointChange();
          }

          onToggle();
        },
        onMouseDown: () => {
          if (window && window.addEventListener) {
            controlPointMoveState.current = {
              initialPosition,
              index,
              significantMoveHappened: false,
              listenersActivated: true
            };
            onStartControlPointChange();
            window.addEventListener('mousemove', onMouseMove);
            window.addEventListener('mouseup', cleanEventListeners);
          }
        },
        isOpen: isOpen,
        position: point.position,
        color: point.color,
        onChange: newPosition => {
          onChange(updateControlPointPosition(controlPoints, index, newPosition));
        }
      }),
      renderContent: ({
        onClose
      }) => createElement(Fragment, null, createElement(ColorPicker, {
        disableAlpha: disableAlpha,
        color: point.color,
        onChangeComplete: ({
          color
        }) => {
          onChange(updateControlPointColor(controlPoints, index, color.toRgbString()));
        }
      }), !disableRemove && createElement(Button, {
        className: "components-custom-gradient-picker__remove-control-point",
        onClick: () => {
          onChange(removeControlPoint(controlPoints, index));
          onClose();
        },
        isLink: true
      }, __('Remove Control Point'))),
      popoverProps: COLOR_POPOVER_PROPS
    });
  });
}

function InsertPoint({
  value: controlPoints,
  onChange,
  onOpenInserter,
  onCloseInserter,
  insertPosition,
  disableAlpha
}) {
  const [alreadyInsertedPoint, setAlreadyInsertedPoint] = useState(false);
  return createElement(Dropdown, {
    className: "components-custom-gradient-picker__inserter",
    onClose: () => {
      onCloseInserter();
    },
    renderToggle: ({
      isOpen,
      onToggle
    }) => createElement(Button, {
      "aria-expanded": isOpen,
      "aria-haspopup": "true",
      onClick: () => {
        if (isOpen) {
          onCloseInserter();
        } else {
          setAlreadyInsertedPoint(false);
          onOpenInserter();
        }

        onToggle();
      },
      className: "components-custom-gradient-picker__insert-point",
      icon: plus,
      style: {
        left: insertPosition !== null ? `${insertPosition}%` : undefined
      }
    }),
    renderContent: () => createElement(ColorPicker, {
      disableAlpha: disableAlpha,
      onChangeComplete: ({
        color
      }) => {
        if (!alreadyInsertedPoint) {
          onChange(addControlPoint(controlPoints, insertPosition, color.toRgbString()));
          setAlreadyInsertedPoint(true);
        } else {
          onChange(updateControlPointColorByPosition(controlPoints, insertPosition, color.toRgbString()));
        }
      }
    }),
    popoverProps: COLOR_POPOVER_PROPS
  });
}

ControlPoints.InsertPoint = InsertPoint;
export default ControlPoints;
//# sourceMappingURL=control-points.js.map