import { Util, Transform } from '../Util.js';
import { Factory } from '../Factory.js';
import { Node } from '../Node.js';
import { Shape } from '../Shape.js';
import { Rect } from './Rect.js';
import { Group } from '../Group.js';
import { Konva } from '../Global.js';
import { getBooleanValidator, getNumberValidator } from '../Validators.js';
import { _registerNode } from '../Global.js';
var EVENTS_NAME = 'tr-konva';
var ATTR_CHANGE_LIST = [
    'resizeEnabledChange',
    'rotateAnchorOffsetChange',
    'rotateEnabledChange',
    'enabledAnchorsChange',
    'anchorSizeChange',
    'borderEnabledChange',
    'borderStrokeChange',
    'borderStrokeWidthChange',
    'borderDashChange',
    'anchorStrokeChange',
    'anchorStrokeWidthChange',
    'anchorFillChange',
    'anchorCornerRadiusChange',
    'ignoreStrokeChange',
    'anchorStyleFuncChange',
]
    .map((e) => e + `.${EVENTS_NAME}`)
    .join(' ');
var NODES_RECT = 'nodesRect';
var TRANSFORM_CHANGE_STR = [
    'widthChange',
    'heightChange',
    'scaleXChange',
    'scaleYChange',
    'skewXChange',
    'skewYChange',
    'rotationChange',
    'offsetXChange',
    'offsetYChange',
    'transformsEnabledChange',
    'strokeWidthChange',
];
var ANGLES = {
    'top-left': -45,
    'top-center': 0,
    'top-right': 45,
    'middle-right': -90,
    'middle-left': 90,
    'bottom-left': -135,
    'bottom-center': 180,
    'bottom-right': 135,
};
const TOUCH_DEVICE = 'ontouchstart' in Konva._global;
function getCursor(anchorName, rad, rotateCursor) {
    if (anchorName === 'rotater') {
        return rotateCursor;
    }
    rad += Util.degToRad(ANGLES[anchorName] || 0);
    var angle = ((Util.radToDeg(rad) % 360) + 360) % 360;
    if (Util._inRange(angle, 315 + 22.5, 360) || Util._inRange(angle, 0, 22.5)) {
        return 'ns-resize';
    }
    else if (Util._inRange(angle, 45 - 22.5, 45 + 22.5)) {
        return 'nesw-resize';
    }
    else if (Util._inRange(angle, 90 - 22.5, 90 + 22.5)) {
        return 'ew-resize';
    }
    else if (Util._inRange(angle, 135 - 22.5, 135 + 22.5)) {
        return 'nwse-resize';
    }
    else if (Util._inRange(angle, 180 - 22.5, 180 + 22.5)) {
        return 'ns-resize';
    }
    else if (Util._inRange(angle, 225 - 22.5, 225 + 22.5)) {
        return 'nesw-resize';
    }
    else if (Util._inRange(angle, 270 - 22.5, 270 + 22.5)) {
        return 'ew-resize';
    }
    else if (Util._inRange(angle, 315 - 22.5, 315 + 22.5)) {
        return 'nwse-resize';
    }
    else {
        Util.error('Transformer has unknown angle for cursor detection: ' + angle);
        return 'pointer';
    }
}
var ANCHORS_NAMES = [
    'top-left',
    'top-center',
    'top-right',
    'middle-right',
    'middle-left',
    'bottom-left',
    'bottom-center',
    'bottom-right',
];
var MAX_SAFE_INTEGER = 100000000;
function getCenter(shape) {
    return {
        x: shape.x +
            (shape.width / 2) * Math.cos(shape.rotation) +
            (shape.height / 2) * Math.sin(-shape.rotation),
        y: shape.y +
            (shape.height / 2) * Math.cos(shape.rotation) +
            (shape.width / 2) * Math.sin(shape.rotation),
    };
}
function rotateAroundPoint(shape, angleRad, point) {
    const x = point.x +
        (shape.x - point.x) * Math.cos(angleRad) -
        (shape.y - point.y) * Math.sin(angleRad);
    const y = point.y +
        (shape.x - point.x) * Math.sin(angleRad) +
        (shape.y - point.y) * Math.cos(angleRad);
    return {
        ...shape,
        rotation: shape.rotation + angleRad,
        x,
        y,
    };
}
function rotateAroundCenter(shape, deltaRad) {
    const center = getCenter(shape);
    return rotateAroundPoint(shape, deltaRad, center);
}
function getSnap(snaps, newRotationRad, tol) {
    let snapped = newRotationRad;
    for (let i = 0; i < snaps.length; i++) {
        const angle = Konva.getAngle(snaps[i]);
        const absDiff = Math.abs(angle - newRotationRad) % (Math.PI * 2);
        const dif = Math.min(absDiff, Math.PI * 2 - absDiff);
        if (dif < tol) {
            snapped = angle;
        }
    }
    return snapped;
}
let activeTransformersCount = 0;
export class Transformer extends Group {
    constructor(config) {
        super(config);
        this._movingAnchorName = null;
        this._transforming = false;
        this._createElements();
        this._handleMouseMove = this._handleMouseMove.bind(this);
        this._handleMouseUp = this._handleMouseUp.bind(this);
        this.update = this.update.bind(this);
        this.on(ATTR_CHANGE_LIST, this.update);
        if (this.getNode()) {
            this.update();
        }
    }
    attachTo(node) {
        this.setNode(node);
        return this;
    }
    setNode(node) {
        Util.warn('tr.setNode(shape), tr.node(shape) and tr.attachTo(shape) methods are deprecated. Please use tr.nodes(nodesArray) instead.');
        return this.setNodes([node]);
    }
    getNode() {
        return this._nodes && this._nodes[0];
    }
    _getEventNamespace() {
        return EVENTS_NAME + this._id;
    }
    setNodes(nodes = []) {
        if (this._nodes && this._nodes.length) {
            this.detach();
        }
        const filteredNodes = nodes.filter((node) => {
            if (node.isAncestorOf(this)) {
                Util.error('Konva.Transformer cannot be an a child of the node you are trying to attach');
                return false;
            }
            return true;
        });
        this._nodes = nodes = filteredNodes;
        if (nodes.length === 1 && this.useSingleNodeRotation()) {
            this.rotation(nodes[0].getAbsoluteRotation());
        }
        else {
            this.rotation(0);
        }
        this._nodes.forEach((node) => {
            const onChange = () => {
                if (this.nodes().length === 1 && this.useSingleNodeRotation()) {
                    this.rotation(this.nodes()[0].getAbsoluteRotation());
                }
                this._resetTransformCache();
                if (!this._transforming && !this.isDragging()) {
                    this.update();
                }
            };
            const additionalEvents = node._attrsAffectingSize
                .map((prop) => prop + 'Change.' + this._getEventNamespace())
                .join(' ');
            node.on(additionalEvents, onChange);
            node.on(TRANSFORM_CHANGE_STR.map((e) => e + `.${this._getEventNamespace()}`).join(' '), onChange);
            node.on(`absoluteTransformChange.${this._getEventNamespace()}`, onChange);
            this._proxyDrag(node);
        });
        this._resetTransformCache();
        var elementsCreated = !!this.findOne('.top-left');
        if (elementsCreated) {
            this.update();
        }
        return this;
    }
    _proxyDrag(node) {
        let lastPos;
        node.on(`dragstart.${this._getEventNamespace()}`, (e) => {
            lastPos = node.getAbsolutePosition();
            if (!this.isDragging() && node !== this.findOne('.back')) {
                this.startDrag(e, false);
            }
        });
        node.on(`dragmove.${this._getEventNamespace()}`, (e) => {
            if (!lastPos) {
                return;
            }
            const abs = node.getAbsolutePosition();
            const dx = abs.x - lastPos.x;
            const dy = abs.y - lastPos.y;
            this.nodes().forEach((otherNode) => {
                if (otherNode === node) {
                    return;
                }
                if (otherNode.isDragging()) {
                    return;
                }
                const otherAbs = otherNode.getAbsolutePosition();
                otherNode.setAbsolutePosition({
                    x: otherAbs.x + dx,
                    y: otherAbs.y + dy,
                });
                otherNode.startDrag(e);
            });
            lastPos = null;
        });
    }
    getNodes() {
        return this._nodes || [];
    }
    getActiveAnchor() {
        return this._movingAnchorName;
    }
    detach() {
        if (this._nodes) {
            this._nodes.forEach((node) => {
                node.off('.' + this._getEventNamespace());
            });
        }
        this._nodes = [];
        this._resetTransformCache();
    }
    _resetTransformCache() {
        this._clearCache(NODES_RECT);
        this._clearCache('transform');
        this._clearSelfAndDescendantCache('absoluteTransform');
    }
    _getNodeRect() {
        return this._getCache(NODES_RECT, this.__getNodeRect);
    }
    __getNodeShape(node, rot = this.rotation(), relative) {
        var rect = node.getClientRect({
            skipTransform: true,
            skipShadow: true,
            skipStroke: this.ignoreStroke(),
        });
        var absScale = node.getAbsoluteScale(relative);
        var absPos = node.getAbsolutePosition(relative);
        var dx = rect.x * absScale.x - node.offsetX() * absScale.x;
        var dy = rect.y * absScale.y - node.offsetY() * absScale.y;
        const rotation = (Konva.getAngle(node.getAbsoluteRotation()) + Math.PI * 2) %
            (Math.PI * 2);
        const box = {
            x: absPos.x + dx * Math.cos(rotation) + dy * Math.sin(-rotation),
            y: absPos.y + dy * Math.cos(rotation) + dx * Math.sin(rotation),
            width: rect.width * absScale.x,
            height: rect.height * absScale.y,
            rotation: rotation,
        };
        return rotateAroundPoint(box, -Konva.getAngle(rot), {
            x: 0,
            y: 0,
        });
    }
    __getNodeRect() {
        var node = this.getNode();
        if (!node) {
            return {
                x: -MAX_SAFE_INTEGER,
                y: -MAX_SAFE_INTEGER,
                width: 0,
                height: 0,
                rotation: 0,
            };
        }
        const totalPoints = [];
        this.nodes().map((node) => {
            const box = node.getClientRect({
                skipTransform: true,
                skipShadow: true,
                skipStroke: this.ignoreStroke(),
            });
            var points = [
                { x: box.x, y: box.y },
                { x: box.x + box.width, y: box.y },
                { x: box.x + box.width, y: box.y + box.height },
                { x: box.x, y: box.y + box.height },
            ];
            var trans = node.getAbsoluteTransform();
            points.forEach(function (point) {
                var transformed = trans.point(point);
                totalPoints.push(transformed);
            });
        });
        const tr = new Transform();
        tr.rotate(-Konva.getAngle(this.rotation()));
        var minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity;
        totalPoints.forEach(function (point) {
            var transformed = tr.point(point);
            if (minX === undefined) {
                minX = maxX = transformed.x;
                minY = maxY = transformed.y;
            }
            minX = Math.min(minX, transformed.x);
            minY = Math.min(minY, transformed.y);
            maxX = Math.max(maxX, transformed.x);
            maxY = Math.max(maxY, transformed.y);
        });
        tr.invert();
        const p = tr.point({ x: minX, y: minY });
        return {
            x: p.x,
            y: p.y,
            width: maxX - minX,
            height: maxY - minY,
            rotation: Konva.getAngle(this.rotation()),
        };
    }
    getX() {
        return this._getNodeRect().x;
    }
    getY() {
        return this._getNodeRect().y;
    }
    getWidth() {
        return this._getNodeRect().width;
    }
    getHeight() {
        return this._getNodeRect().height;
    }
    _createElements() {
        this._createBack();
        ANCHORS_NAMES.forEach((name) => {
            this._createAnchor(name);
        });
        this._createAnchor('rotater');
    }
    _createAnchor(name) {
        var anchor = new Rect({
            stroke: 'rgb(0, 161, 255)',
            fill: 'white',
            strokeWidth: 1,
            name: name + ' _anchor',
            dragDistance: 0,
            draggable: true,
            hitStrokeWidth: TOUCH_DEVICE ? 10 : 'auto',
        });
        var self = this;
        anchor.on('mousedown touchstart', function (e) {
            self._handleMouseDown(e);
        });
        anchor.on('dragstart', (e) => {
            anchor.stopDrag();
            e.cancelBubble = true;
        });
        anchor.on('dragend', (e) => {
            e.cancelBubble = true;
        });
        anchor.on('mouseenter', () => {
            var rad = Konva.getAngle(this.rotation());
            var rotateCursor = this.rotateAnchorCursor();
            var cursor = getCursor(name, rad, rotateCursor);
            anchor.getStage().content &&
                (anchor.getStage().content.style.cursor = cursor);
            this._cursorChange = true;
        });
        anchor.on('mouseout', () => {
            anchor.getStage().content &&
                (anchor.getStage().content.style.cursor = '');
            this._cursorChange = false;
        });
        this.add(anchor);
    }
    _createBack() {
        var back = new Shape({
            name: 'back',
            width: 0,
            height: 0,
            draggable: true,
            sceneFunc(ctx, shape) {
                var tr = shape.getParent();
                var padding = tr.padding();
                ctx.beginPath();
                ctx.rect(-padding, -padding, shape.width() + padding * 2, shape.height() + padding * 2);
                ctx.moveTo(shape.width() / 2, -padding);
                if (tr.rotateEnabled() && tr.rotateLineVisible()) {
                    ctx.lineTo(shape.width() / 2, -tr.rotateAnchorOffset() * Util._sign(shape.height()) - padding);
                }
                ctx.fillStrokeShape(shape);
            },
            hitFunc: (ctx, shape) => {
                if (!this.shouldOverdrawWholeArea()) {
                    return;
                }
                var padding = this.padding();
                ctx.beginPath();
                ctx.rect(-padding, -padding, shape.width() + padding * 2, shape.height() + padding * 2);
                ctx.fillStrokeShape(shape);
            },
        });
        this.add(back);
        this._proxyDrag(back);
        back.on('dragstart', (e) => {
            e.cancelBubble = true;
        });
        back.on('dragmove', (e) => {
            e.cancelBubble = true;
        });
        back.on('dragend', (e) => {
            e.cancelBubble = true;
        });
        this.on('dragmove', (e) => {
            this.update();
        });
    }
    _handleMouseDown(e) {
        if (this._transforming) {
            return;
        }
        this._movingAnchorName = e.target.name().split(' ')[0];
        var attrs = this._getNodeRect();
        var width = attrs.width;
        var height = attrs.height;
        var hypotenuse = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2));
        this.sin = Math.abs(height / hypotenuse);
        this.cos = Math.abs(width / hypotenuse);
        if (typeof window !== 'undefined') {
            window.addEventListener('mousemove', this._handleMouseMove);
            window.addEventListener('touchmove', this._handleMouseMove);
            window.addEventListener('mouseup', this._handleMouseUp, true);
            window.addEventListener('touchend', this._handleMouseUp, true);
        }
        this._transforming = true;
        var ap = e.target.getAbsolutePosition();
        var pos = e.target.getStage().getPointerPosition();
        this._anchorDragOffset = {
            x: pos.x - ap.x,
            y: pos.y - ap.y,
        };
        activeTransformersCount++;
        this._fire('transformstart', { evt: e.evt, target: this.getNode() });
        this._nodes.forEach((target) => {
            target._fire('transformstart', { evt: e.evt, target });
        });
    }
    _handleMouseMove(e) {
        var x, y, newHypotenuse;
        var anchorNode = this.findOne('.' + this._movingAnchorName);
        var stage = anchorNode.getStage();
        stage.setPointersPositions(e);
        const pp = stage.getPointerPosition();
        let newNodePos = {
            x: pp.x - this._anchorDragOffset.x,
            y: pp.y - this._anchorDragOffset.y,
        };
        const oldAbs = anchorNode.getAbsolutePosition();
        if (this.anchorDragBoundFunc()) {
            newNodePos = this.anchorDragBoundFunc()(oldAbs, newNodePos, e);
        }
        anchorNode.setAbsolutePosition(newNodePos);
        const newAbs = anchorNode.getAbsolutePosition();
        if (oldAbs.x === newAbs.x && oldAbs.y === newAbs.y) {
            return;
        }
        if (this._movingAnchorName === 'rotater') {
            var attrs = this._getNodeRect();
            x = anchorNode.x() - attrs.width / 2;
            y = -anchorNode.y() + attrs.height / 2;
            let delta = Math.atan2(-y, x) + Math.PI / 2;
            if (attrs.height < 0) {
                delta -= Math.PI;
            }
            var oldRotation = Konva.getAngle(this.rotation());
            const newRotation = oldRotation + delta;
            const tol = Konva.getAngle(this.rotationSnapTolerance());
            const snappedRot = getSnap(this.rotationSnaps(), newRotation, tol);
            const diff = snappedRot - attrs.rotation;
            const shape = rotateAroundCenter(attrs, diff);
            this._fitNodesInto(shape, e);
            return;
        }
        var shiftBehavior = this.shiftBehavior();
        var keepProportion;
        if (shiftBehavior === 'inverted') {
            keepProportion = this.keepRatio() && !e.shiftKey;
        }
        else if (shiftBehavior === 'none') {
            keepProportion = this.keepRatio();
        }
        else {
            keepProportion = this.keepRatio() || e.shiftKey;
        }
        var centeredScaling = this.centeredScaling() || e.altKey;
        if (this._movingAnchorName === 'top-left') {
            if (keepProportion) {
                var comparePoint = centeredScaling
                    ? {
                        x: this.width() / 2,
                        y: this.height() / 2,
                    }
                    : {
                        x: this.findOne('.bottom-right').x(),
                        y: this.findOne('.bottom-right').y(),
                    };
                newHypotenuse = Math.sqrt(Math.pow(comparePoint.x - anchorNode.x(), 2) +
                    Math.pow(comparePoint.y - anchorNode.y(), 2));
                var reverseX = this.findOne('.top-left').x() > comparePoint.x ? -1 : 1;
                var reverseY = this.findOne('.top-left').y() > comparePoint.y ? -1 : 1;
                x = newHypotenuse * this.cos * reverseX;
                y = newHypotenuse * this.sin * reverseY;
                this.findOne('.top-left').x(comparePoint.x - x);
                this.findOne('.top-left').y(comparePoint.y - y);
            }
        }
        else if (this._movingAnchorName === 'top-center') {
            this.findOne('.top-left').y(anchorNode.y());
        }
        else if (this._movingAnchorName === 'top-right') {
            if (keepProportion) {
                var comparePoint = centeredScaling
                    ? {
                        x: this.width() / 2,
                        y: this.height() / 2,
                    }
                    : {
                        x: this.findOne('.bottom-left').x(),
                        y: this.findOne('.bottom-left').y(),
                    };
                newHypotenuse = Math.sqrt(Math.pow(anchorNode.x() - comparePoint.x, 2) +
                    Math.pow(comparePoint.y - anchorNode.y(), 2));
                var reverseX = this.findOne('.top-right').x() < comparePoint.x ? -1 : 1;
                var reverseY = this.findOne('.top-right').y() > comparePoint.y ? -1 : 1;
                x = newHypotenuse * this.cos * reverseX;
                y = newHypotenuse * this.sin * reverseY;
                this.findOne('.top-right').x(comparePoint.x + x);
                this.findOne('.top-right').y(comparePoint.y - y);
            }
            var pos = anchorNode.position();
            this.findOne('.top-left').y(pos.y);
            this.findOne('.bottom-right').x(pos.x);
        }
        else if (this._movingAnchorName === 'middle-left') {
            this.findOne('.top-left').x(anchorNode.x());
        }
        else if (this._movingAnchorName === 'middle-right') {
            this.findOne('.bottom-right').x(anchorNode.x());
        }
        else if (this._movingAnchorName === 'bottom-left') {
            if (keepProportion) {
                var comparePoint = centeredScaling
                    ? {
                        x: this.width() / 2,
                        y: this.height() / 2,
                    }
                    : {
                        x: this.findOne('.top-right').x(),
                        y: this.findOne('.top-right').y(),
                    };
                newHypotenuse = Math.sqrt(Math.pow(comparePoint.x - anchorNode.x(), 2) +
                    Math.pow(anchorNode.y() - comparePoint.y, 2));
                var reverseX = comparePoint.x < anchorNode.x() ? -1 : 1;
                var reverseY = anchorNode.y() < comparePoint.y ? -1 : 1;
                x = newHypotenuse * this.cos * reverseX;
                y = newHypotenuse * this.sin * reverseY;
                anchorNode.x(comparePoint.x - x);
                anchorNode.y(comparePoint.y + y);
            }
            pos = anchorNode.position();
            this.findOne('.top-left').x(pos.x);
            this.findOne('.bottom-right').y(pos.y);
        }
        else if (this._movingAnchorName === 'bottom-center') {
            this.findOne('.bottom-right').y(anchorNode.y());
        }
        else if (this._movingAnchorName === 'bottom-right') {
            if (keepProportion) {
                var comparePoint = centeredScaling
                    ? {
                        x: this.width() / 2,
                        y: this.height() / 2,
                    }
                    : {
                        x: this.findOne('.top-left').x(),
                        y: this.findOne('.top-left').y(),
                    };
                newHypotenuse = Math.sqrt(Math.pow(anchorNode.x() - comparePoint.x, 2) +
                    Math.pow(anchorNode.y() - comparePoint.y, 2));
                var reverseX = this.findOne('.bottom-right').x() < comparePoint.x ? -1 : 1;
                var reverseY = this.findOne('.bottom-right').y() < comparePoint.y ? -1 : 1;
                x = newHypotenuse * this.cos * reverseX;
                y = newHypotenuse * this.sin * reverseY;
                this.findOne('.bottom-right').x(comparePoint.x + x);
                this.findOne('.bottom-right').y(comparePoint.y + y);
            }
        }
        else {
            console.error(new Error('Wrong position argument of selection resizer: ' +
                this._movingAnchorName));
        }
        var centeredScaling = this.centeredScaling() || e.altKey;
        if (centeredScaling) {
            var topLeft = this.findOne('.top-left');
            var bottomRight = this.findOne('.bottom-right');
            var topOffsetX = topLeft.x();
            var topOffsetY = topLeft.y();
            var bottomOffsetX = this.getWidth() - bottomRight.x();
            var bottomOffsetY = this.getHeight() - bottomRight.y();
            bottomRight.move({
                x: -topOffsetX,
                y: -topOffsetY,
            });
            topLeft.move({
                x: bottomOffsetX,
                y: bottomOffsetY,
            });
        }
        var absPos = this.findOne('.top-left').getAbsolutePosition();
        x = absPos.x;
        y = absPos.y;
        var width = this.findOne('.bottom-right').x() - this.findOne('.top-left').x();
        var height = this.findOne('.bottom-right').y() - this.findOne('.top-left').y();
        this._fitNodesInto({
            x: x,
            y: y,
            width: width,
            height: height,
            rotation: Konva.getAngle(this.rotation()),
        }, e);
    }
    _handleMouseUp(e) {
        this._removeEvents(e);
    }
    getAbsoluteTransform() {
        return this.getTransform();
    }
    _removeEvents(e) {
        var _a;
        if (this._transforming) {
            this._transforming = false;
            if (typeof window !== 'undefined') {
                window.removeEventListener('mousemove', this._handleMouseMove);
                window.removeEventListener('touchmove', this._handleMouseMove);
                window.removeEventListener('mouseup', this._handleMouseUp, true);
                window.removeEventListener('touchend', this._handleMouseUp, true);
            }
            var node = this.getNode();
            activeTransformersCount--;
            this._fire('transformend', { evt: e, target: node });
            (_a = this.getLayer()) === null || _a === void 0 ? void 0 : _a.batchDraw();
            if (node) {
                this._nodes.forEach((target) => {
                    var _a;
                    target._fire('transformend', { evt: e, target });
                    (_a = target.getLayer()) === null || _a === void 0 ? void 0 : _a.batchDraw();
                });
            }
            this._movingAnchorName = null;
        }
    }
    _fitNodesInto(newAttrs, evt) {
        var oldAttrs = this._getNodeRect();
        const minWidth = 10;
        if (newAttrs.width < minWidth) {
            newAttrs.width = minWidth;
            if (this._movingAnchorName &&
                this._movingAnchorName.indexOf('left') >= 0) {
                newAttrs.x = oldAttrs.x + oldAttrs.width - minWidth;
            }
        }
        const minSize = 1;
        if (Util._inRange(newAttrs.width, -this.padding() * 2 - minSize, minSize)) {
            this.update();
            return;
        }
        if (Util._inRange(newAttrs.height, -this.padding() * 2 - minSize, minSize)) {
            this.update();
            return;
        }
        var t = new Transform();
        t.rotate(Konva.getAngle(this.rotation()));
        if (this._movingAnchorName &&
            newAttrs.width < 0 &&
            this._movingAnchorName.indexOf('left') >= 0) {
            const offset = t.point({
                x: -this.padding() * 2,
                y: 0,
            });
            newAttrs.x += offset.x;
            newAttrs.y += offset.y;
            newAttrs.width += this.padding() * 2;
            this._movingAnchorName = this._movingAnchorName.replace('left', 'right');
            this._anchorDragOffset.x -= offset.x;
            this._anchorDragOffset.y -= offset.y;
        }
        else if (this._movingAnchorName &&
            newAttrs.width < 0 &&
            this._movingAnchorName.indexOf('right') >= 0) {
            const offset = t.point({
                x: this.padding() * 2,
                y: 0,
            });
            this._movingAnchorName = this._movingAnchorName.replace('right', 'left');
            this._anchorDragOffset.x -= offset.x;
            this._anchorDragOffset.y -= offset.y;
            newAttrs.width += this.padding() * 2;
        }
        if (this._movingAnchorName &&
            newAttrs.height < 0 &&
            this._movingAnchorName.indexOf('top') >= 0) {
            const offset = t.point({
                x: 0,
                y: -this.padding() * 2,
            });
            newAttrs.x += offset.x;
            newAttrs.y += offset.y;
            this._movingAnchorName = this._movingAnchorName.replace('top', 'bottom');
            this._anchorDragOffset.x -= offset.x;
            this._anchorDragOffset.y -= offset.y;
            newAttrs.height += this.padding() * 2;
        }
        else if (this._movingAnchorName &&
            newAttrs.height < 0 &&
            this._movingAnchorName.indexOf('bottom') >= 0) {
            const offset = t.point({
                x: 0,
                y: this.padding() * 2,
            });
            this._movingAnchorName = this._movingAnchorName.replace('bottom', 'top');
            this._anchorDragOffset.x -= offset.x;
            this._anchorDragOffset.y -= offset.y;
            newAttrs.height += this.padding() * 2;
        }
        if (this.boundBoxFunc()) {
            const bounded = this.boundBoxFunc()(oldAttrs, newAttrs);
            if (bounded) {
                newAttrs = bounded;
            }
            else {
                Util.warn('boundBoxFunc returned falsy. You should return new bound rect from it!');
            }
        }
        const baseSize = 10000000;
        const oldTr = new Transform();
        oldTr.translate(oldAttrs.x, oldAttrs.y);
        oldTr.rotate(oldAttrs.rotation);
        oldTr.scale(oldAttrs.width / baseSize, oldAttrs.height / baseSize);
        const newTr = new Transform();
        const newScaleX = newAttrs.width / baseSize;
        const newScaleY = newAttrs.height / baseSize;
        if (this.flipEnabled() === false) {
            newTr.translate(newAttrs.x, newAttrs.y);
            newTr.rotate(newAttrs.rotation);
            newTr.translate(newAttrs.width < 0 ? newAttrs.width : 0, newAttrs.height < 0 ? newAttrs.height : 0);
            newTr.scale(Math.abs(newScaleX), Math.abs(newScaleY));
        }
        else {
            newTr.translate(newAttrs.x, newAttrs.y);
            newTr.rotate(newAttrs.rotation);
            newTr.scale(newScaleX, newScaleY);
        }
        const delta = newTr.multiply(oldTr.invert());
        this._nodes.forEach((node) => {
            var _a;
            const parentTransform = node.getParent().getAbsoluteTransform();
            const localTransform = node.getTransform().copy();
            localTransform.translate(node.offsetX(), node.offsetY());
            const newLocalTransform = new Transform();
            newLocalTransform
                .multiply(parentTransform.copy().invert())
                .multiply(delta)
                .multiply(parentTransform)
                .multiply(localTransform);
            const attrs = newLocalTransform.decompose();
            node.setAttrs(attrs);
            (_a = node.getLayer()) === null || _a === void 0 ? void 0 : _a.batchDraw();
        });
        this.rotation(Util._getRotation(newAttrs.rotation));
        this._nodes.forEach((node) => {
            this._fire('transform', { evt: evt, target: node });
            node._fire('transform', { evt: evt, target: node });
        });
        this._resetTransformCache();
        this.update();
        this.getLayer().batchDraw();
    }
    forceUpdate() {
        this._resetTransformCache();
        this.update();
    }
    _batchChangeChild(selector, attrs) {
        const anchor = this.findOne(selector);
        anchor.setAttrs(attrs);
    }
    update() {
        var _a;
        var attrs = this._getNodeRect();
        this.rotation(Util._getRotation(attrs.rotation));
        var width = attrs.width;
        var height = attrs.height;
        var enabledAnchors = this.enabledAnchors();
        var resizeEnabled = this.resizeEnabled();
        var padding = this.padding();
        var anchorSize = this.anchorSize();
        const anchors = this.find('._anchor');
        anchors.forEach((node) => {
            node.setAttrs({
                width: anchorSize,
                height: anchorSize,
                offsetX: anchorSize / 2,
                offsetY: anchorSize / 2,
                stroke: this.anchorStroke(),
                strokeWidth: this.anchorStrokeWidth(),
                fill: this.anchorFill(),
                cornerRadius: this.anchorCornerRadius(),
            });
        });
        this._batchChangeChild('.top-left', {
            x: 0,
            y: 0,
            offsetX: anchorSize / 2 + padding,
            offsetY: anchorSize / 2 + padding,
            visible: resizeEnabled && enabledAnchors.indexOf('top-left') >= 0,
        });
        this._batchChangeChild('.top-center', {
            x: width / 2,
            y: 0,
            offsetY: anchorSize / 2 + padding,
            visible: resizeEnabled && enabledAnchors.indexOf('top-center') >= 0,
        });
        this._batchChangeChild('.top-right', {
            x: width,
            y: 0,
            offsetX: anchorSize / 2 - padding,
            offsetY: anchorSize / 2 + padding,
            visible: resizeEnabled && enabledAnchors.indexOf('top-right') >= 0,
        });
        this._batchChangeChild('.middle-left', {
            x: 0,
            y: height / 2,
            offsetX: anchorSize / 2 + padding,
            visible: resizeEnabled && enabledAnchors.indexOf('middle-left') >= 0,
        });
        this._batchChangeChild('.middle-right', {
            x: width,
            y: height / 2,
            offsetX: anchorSize / 2 - padding,
            visible: resizeEnabled && enabledAnchors.indexOf('middle-right') >= 0,
        });
        this._batchChangeChild('.bottom-left', {
            x: 0,
            y: height,
            offsetX: anchorSize / 2 + padding,
            offsetY: anchorSize / 2 - padding,
            visible: resizeEnabled && enabledAnchors.indexOf('bottom-left') >= 0,
        });
        this._batchChangeChild('.bottom-center', {
            x: width / 2,
            y: height,
            offsetY: anchorSize / 2 - padding,
            visible: resizeEnabled && enabledAnchors.indexOf('bottom-center') >= 0,
        });
        this._batchChangeChild('.bottom-right', {
            x: width,
            y: height,
            offsetX: anchorSize / 2 - padding,
            offsetY: anchorSize / 2 - padding,
            visible: resizeEnabled && enabledAnchors.indexOf('bottom-right') >= 0,
        });
        this._batchChangeChild('.rotater', {
            x: width / 2,
            y: -this.rotateAnchorOffset() * Util._sign(height) - padding,
            visible: this.rotateEnabled(),
        });
        this._batchChangeChild('.back', {
            width: width,
            height: height,
            visible: this.borderEnabled(),
            stroke: this.borderStroke(),
            strokeWidth: this.borderStrokeWidth(),
            dash: this.borderDash(),
            x: 0,
            y: 0,
        });
        const styleFunc = this.anchorStyleFunc();
        if (styleFunc) {
            anchors.forEach((node) => {
                styleFunc(node);
            });
        }
        (_a = this.getLayer()) === null || _a === void 0 ? void 0 : _a.batchDraw();
    }
    isTransforming() {
        return this._transforming;
    }
    stopTransform() {
        if (this._transforming) {
            this._removeEvents();
            var anchorNode = this.findOne('.' + this._movingAnchorName);
            if (anchorNode) {
                anchorNode.stopDrag();
            }
        }
    }
    destroy() {
        if (this.getStage() && this._cursorChange) {
            this.getStage().content && (this.getStage().content.style.cursor = '');
        }
        Group.prototype.destroy.call(this);
        this.detach();
        this._removeEvents();
        return this;
    }
    toObject() {
        return Node.prototype.toObject.call(this);
    }
    clone(obj) {
        var node = Node.prototype.clone.call(this, obj);
        return node;
    }
    getClientRect() {
        if (this.nodes().length > 0) {
            return super.getClientRect();
        }
        else {
            return { x: 0, y: 0, width: 0, height: 0 };
        }
    }
}
Transformer.isTransforming = () => {
    return activeTransformersCount > 0;
};
function validateAnchors(val) {
    if (!(val instanceof Array)) {
        Util.warn('enabledAnchors value should be an array');
    }
    if (val instanceof Array) {
        val.forEach(function (name) {
            if (ANCHORS_NAMES.indexOf(name) === -1) {
                Util.warn('Unknown anchor name: ' +
                    name +
                    '. Available names are: ' +
                    ANCHORS_NAMES.join(', '));
            }
        });
    }
    return val || [];
}
Transformer.prototype.className = 'Transformer';
_registerNode(Transformer);
Factory.addGetterSetter(Transformer, 'enabledAnchors', ANCHORS_NAMES, validateAnchors);
Factory.addGetterSetter(Transformer, 'flipEnabled', true, getBooleanValidator());
Factory.addGetterSetter(Transformer, 'resizeEnabled', true);
Factory.addGetterSetter(Transformer, 'anchorSize', 10, getNumberValidator());
Factory.addGetterSetter(Transformer, 'rotateEnabled', true);
Factory.addGetterSetter(Transformer, 'rotateLineVisible', true);
Factory.addGetterSetter(Transformer, 'rotationSnaps', []);
Factory.addGetterSetter(Transformer, 'rotateAnchorOffset', 50, getNumberValidator());
Factory.addGetterSetter(Transformer, 'rotateAnchorCursor', 'crosshair');
Factory.addGetterSetter(Transformer, 'rotationSnapTolerance', 5, getNumberValidator());
Factory.addGetterSetter(Transformer, 'borderEnabled', true);
Factory.addGetterSetter(Transformer, 'anchorStroke', 'rgb(0, 161, 255)');
Factory.addGetterSetter(Transformer, 'anchorStrokeWidth', 1, getNumberValidator());
Factory.addGetterSetter(Transformer, 'anchorFill', 'white');
Factory.addGetterSetter(Transformer, 'anchorCornerRadius', 0, getNumberValidator());
Factory.addGetterSetter(Transformer, 'borderStroke', 'rgb(0, 161, 255)');
Factory.addGetterSetter(Transformer, 'borderStrokeWidth', 1, getNumberValidator());
Factory.addGetterSetter(Transformer, 'borderDash');
Factory.addGetterSetter(Transformer, 'keepRatio', true);
Factory.addGetterSetter(Transformer, 'shiftBehavior', 'default');
Factory.addGetterSetter(Transformer, 'centeredScaling', false);
Factory.addGetterSetter(Transformer, 'ignoreStroke', false);
Factory.addGetterSetter(Transformer, 'padding', 0, getNumberValidator());
Factory.addGetterSetter(Transformer, 'node');
Factory.addGetterSetter(Transformer, 'nodes');
Factory.addGetterSetter(Transformer, 'boundBoxFunc');
Factory.addGetterSetter(Transformer, 'anchorDragBoundFunc');
Factory.addGetterSetter(Transformer, 'anchorStyleFunc');
Factory.addGetterSetter(Transformer, 'shouldOverdrawWholeArea', false);
Factory.addGetterSetter(Transformer, 'useSingleNodeRotation', true);
Factory.backCompat(Transformer, {
    lineEnabled: 'borderEnabled',
    rotateHandlerOffset: 'rotateAnchorOffset',
    enabledHandlers: 'enabledAnchors',
});
