advanced-cropper/node/algorithms/flipImageAlgorithm.js

The core of the advanced cropper libraries family

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

require('tslib');
var utils = require('../service/utils.js');
var helpers = require('../service/helpers.js');
var copyState = require('../state/copyState.js');
require('../types/index.js');
require('../state/setCoordinates.js');

function flipImageAlgorithm(state, settings, horizontal, vertical) {
    if (helpers.isInitializedState(state)) {
        var result = copyState.copyState(state);
        var rotate = state.transforms.rotate;
        var imageSize = helpers.getTransformedImageSize(state);
        var changed = {
            horizontal: horizontal,
            vertical: vertical,
        };
        if (changed.horizontal || changed.vertical) {
            var imageCenter = utils.rotatePoint({
                left: imageSize.width / 2,
                top: imageSize.height / 2,
            }, -rotate);
            var oldCenter = utils.rotatePoint(utils.getCenter(result.coordinates), -rotate);
            var newCenter = utils.rotatePoint({
                left: changed.horizontal ? imageCenter.left - (oldCenter.left - imageCenter.left) : oldCenter.left,
                top: changed.vertical ? imageCenter.top - (oldCenter.top - imageCenter.top) : oldCenter.top,
            }, rotate);
            result.coordinates = utils.applyMove(result.coordinates, utils.diff(newCenter, utils.getCenter(result.coordinates)));
            oldCenter = utils.rotatePoint(utils.getCenter(result.visibleArea), -rotate);
            newCenter = utils.rotatePoint({
                left: changed.horizontal ? imageCenter.left - (oldCenter.left - imageCenter.left) : oldCenter.left,
                top: changed.vertical ? imageCenter.top - (oldCenter.top - imageCenter.top) : oldCenter.top,
            }, rotate);
            result.visibleArea = utils.applyMove(result.visibleArea, utils.diff(newCenter, utils.getCenter(result.visibleArea)));
            result.visibleArea = utils.moveToPositionRestrictions(result.visibleArea, helpers.getAreaPositionRestrictions(result, settings));
        }
        if (changed.horizontal) {
            result.transforms.flip.horizontal = !state.transforms.flip.horizontal;
        }
        if (changed.vertical) {
            result.transforms.flip.vertical = !state.transforms.flip.vertical;
        }
        return result;
    }
    return state;
}

exports.flipImageAlgorithm = flipImageAlgorithm;