src_image_deleteSegmentCommand.js
import {MaskSegmentHelper} from './maskSegmentHelper';
import {BLACK} from '../utils/colour';
// doc imports
/* eslint-disable no-unused-vars */
import {Image} from './image';
import {MaskSegment} from '../dicom/dicomSegment';
/* eslint-enable no-unused-vars */
/**
* Delete segment command.
*/
export class DeleteSegmentCommand {
/**
* The associated mask.
*
* @type {Image}
*/
#mask;
/**
* The segment to remove.
*
* @type {MaskSegment}
*/
#segment;
/**
* Flag to send creation events.
*
* @type {boolean}
*/
#isSilent;
/**
* List of offsets.
*
* @type {number[]}
*/
#offsets;
/**
* @param {Image} mask The mask image.
* @param {MaskSegment} segment The segment to remove.
* @param {boolean} [silent] Whether to send a creation event or not.
*/
constructor(mask, segment, silent) {
this.#mask = mask;
this.#segment = segment;
this.#isSilent = (typeof silent === 'undefined') ? false : silent;
// list of offsets with the colour to delete
if (typeof segment.displayRGBValue !== 'undefined') {
this.#offsets = mask.getOffsets(segment.displayRGBValue);
} else {
this.#offsets = mask.getOffsets(segment.displayValue);
}
}
/**
* Get the command name.
*
* @returns {string} The command name.
*/
getName() {
return 'Delete-segment';
}
/**
* Check if a command is valid and can be executed.
*
* @returns {boolean} True if the command is valid.
*/
isValid() {
const segments = this.#mask.getMeta().custom.segments;
return segments.some(segmentItem =>
segmentItem.number === this.#segment.number
);
}
/**
* Execute the command.
*
* @fires DeleteSegmentCommand#masksegmentdelete
*/
execute() {
if (this.#offsets.length !== 0) {
// remove from image
if (typeof this.#segment.displayRGBValue !== 'undefined') {
this.#mask.setAtOffsets(this.#offsets, BLACK);
} else {
this.#mask.setAtOffsets(this.#offsets, 0);
}
}
// remove from segments
const segHelper = new MaskSegmentHelper(this.#mask);
segHelper.removeSegment(this.#segment.number);
// callback
if (!this.#isSilent) {
/**
* Segment delete event.
*
* @event DeleteSegmentCommand#masksegmentdelete
* @type {object}
* @property {number} segmentnumber The segment number.
*/
this.onExecute({
type: 'masksegmentdelete',
segmentnumber: this.#segment.number
});
}
}
/**
* Undo the command.
*
* @fires DeleteSegmentCommand#masksegmentredraw
*/
undo() {
if (this.#offsets.length !== 0) {
// re-draw in image
if (typeof this.#segment.displayRGBValue !== 'undefined') {
this.#mask.setAtOffsets(this.#offsets, this.#segment.displayRGBValue);
} else {
this.#mask.setAtOffsets(this.#offsets, this.#segment.displayValue);
}
}
// add back to segments
const segHelper = new MaskSegmentHelper(this.#mask);
segHelper.addSegment(this.#segment);
// callback
/**
* Segment redraw event.
*
* @event DeleteSegmentCommand#masksegmentredraw
* @type {object}
* @property {number} segmentnumber The segment number.
*/
this.onUndo({
type: 'masksegmentredraw',
segmentnumber: this.#segment.number
});
}
/**
* Handle an execute event.
*
* @param {object} _event The execute event with type and id.
*/
onExecute(_event) {
// default does nothing.
}
/**
* Handle an undo event.
*
* @param {object} _event The undo event with type and id.
*/
onUndo(_event) {
// default does nothing.
}
} // DeleteSegmentCommand class