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import { getEnabledElement } from '@cornerstonejs/core';
import type { Types } from '@cornerstonejs/core';
import { state } from '../../../store';
import { Events } from '../../../enums';
import {
resetElementCursor,
hideElementCursor,
} from '../../../cursors/elementCursor';
import type { EventTypes } from '../../../types';
import { PlanarFreehandROIAnnotation } from '../../../types/ToolSpecificAnnotationTypes';
import { polyline } from '../../../utilities/math';
import {
shouldSmooth,
getInterpolatedPoints,
} from '../../../utilities/planarFreehandROITool/smoothPoints';
import triggerAnnotationRenderForViewportIds from '../../../utilities/triggerAnnotationRenderForViewportIds';
import { updateContourPolyline } from '../../../utilities/contours';
import findOpenUShapedContourVectorToPeak from './findOpenUShapedContourVectorToPeak';
import { triggerAnnotationModified } from '../../../stateManagement/annotation/helpers/state';
const { addCanvasPointsToArray, getSubPixelSpacingAndXYDirections } = polyline;
/**
* Activates the open contour edit event loop.
*/
function activateOpenContourEdit(
evt: EventTypes.InteractionEventType,
annotation: PlanarFreehandROIAnnotation,
viewportIdsToRender: string[]
): void {
this.isEditingOpen = true;
const eventDetail = evt.detail;
const { currentPoints, element } = eventDetail;
const canvasPos = currentPoints.canvas;
const enabledElement = getEnabledElement(element);
const { viewport } = enabledElement;
const prevCanvasPoints = annotation.data.contour.polyline.map(
viewport.worldToCanvas
);
const { spacing, xDir, yDir } = getSubPixelSpacingAndXYDirections(
viewport,
this.configuration.subPixelResolution
);
this.editData = {
prevCanvasPoints,
editCanvasPoints: [canvasPos],
startCrossingIndex: undefined,
editIndex: 0,
};
this.commonData = {
annotation,
viewportIdsToRender,
spacing,
xDir,
yDir,
movingTextBox: false,
};
state.isInteractingWithTool = true;
element.addEventListener(
Events.MOUSE_UP,
this.mouseUpOpenContourEditCallback
);
element.addEventListener(
Events.MOUSE_DRAG,
this.mouseDragOpenContourEditCallback
);
element.addEventListener(
Events.MOUSE_CLICK,
this.mouseUpOpenContourEditCallback
);
element.addEventListener(
Events.TOUCH_END,
this.mouseUpOpenContourEditCallback
);
element.addEventListener(
Events.TOUCH_DRAG,
this.mouseDragOpenContourEditCallback
);
element.addEventListener(
Events.TOUCH_TAP,
this.mouseUpOpenContourEditCallback
);
hideElementCursor(element);
}
/**
* Deactivates and cleans up the closed contour edit event loop.
*/
function deactivateOpenContourEdit(element: HTMLDivElement) {
state.isInteractingWithTool = false;
element.removeEventListener(
Events.MOUSE_UP,
this.mouseUpOpenContourEditCallback
);
element.removeEventListener(
Events.MOUSE_DRAG,
this.mouseDragOpenContourEditCallback
);
element.removeEventListener(
Events.MOUSE_CLICK,
this.mouseUpOpenContourEditCallback
);
element.removeEventListener(
Events.TOUCH_END,
this.mouseUpOpenContourEditCallback
);
element.removeEventListener(
Events.TOUCH_DRAG,
this.mouseDragOpenContourEditCallback
);
element.removeEventListener(
Events.TOUCH_TAP,
this.mouseUpOpenContourEditCallback
);
resetElementCursor(element);
}
/**
* Adds points to the edit line and calculates the preview of the edit to render.
* Checks if an edit needs to be completed by crossing of lines, or by dragging
* the edit line past the end of the open contour.
*/
function mouseDragOpenContourEditCallback(
evt: EventTypes.InteractionEventType
): boolean {
const eventDetail = evt.detail;
const { currentPoints, element } = eventDetail;
const worldPos = currentPoints.world;
const canvasPos = currentPoints.canvas;
const enabledElement = getEnabledElement(element);
const { renderingEngine, viewport } = enabledElement;
const { viewportIdsToRender, xDir, yDir, spacing } = this.commonData;
const { editIndex, editCanvasPoints, startCrossingIndex } = this.editData;
const lastCanvasPoint = editCanvasPoints[editCanvasPoints.length - 1];
const lastWorldPoint = viewport.canvasToWorld(lastCanvasPoint);
const worldPosDiff = vec3.create();
vec3.subtract(worldPosDiff, worldPos, lastWorldPoint);
const xDist = Math.abs(vec3.dot(worldPosDiff, xDir));
const yDist = Math.abs(vec3.dot(worldPosDiff, yDir));
// Get pixel spacing in the direction.
// Check that we have moved at least one voxel in each direction.
if (xDist <= spacing[0] && yDist <= spacing[1]) {
// Haven't changed world point enough, don't render
return;
}
if (startCrossingIndex !== undefined) {
// Edge case: If the edit line itself crosses, remove part of that edit line so we don't
// Get isolated regions.
this.checkAndRemoveCrossesOnEditLine(evt);
}
const numPointsAdded = addCanvasPointsToArray(
element,
editCanvasPoints,
canvasPos,
this.commonData
);
const currentEditIndex = editIndex + numPointsAdded;
this.editData.editIndex = currentEditIndex;
if (startCrossingIndex === undefined && editCanvasPoints.length > 1) {
this.checkForFirstCrossing(evt, false);
}
this.editData.snapIndex = this.findSnapIndex();
this.editData.fusedCanvasPoints = this.fuseEditPointsWithOpenContour(evt);
if (
startCrossingIndex !== undefined &&
this.checkForSecondCrossing(evt, false)
) {
this.removePointsAfterSecondCrossing(false);
this.finishEditOpenOnSecondCrossing(evt);
} else if (this.checkIfShouldOverwriteAnEnd(evt)) {
this.openContourEditOverwriteEnd(evt);
}
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
}
/**
* Overwrite the end of the contour with the edit, and then switch to the
* open contour end edit loop.
*/
function openContourEditOverwriteEnd(
evt: EventTypes.InteractionEventType
): void {
const eventDetail = evt.detail;
const { element } = eventDetail;
const enabledElement = getEnabledElement(element);
const { viewport } = enabledElement;
const { annotation, viewportIdsToRender } = this.commonData;
const fusedCanvasPoints = this.fuseEditPointsForOpenContourEndEdit();
updateContourPolyline(
annotation,
{
points: fusedCanvasPoints,
closed: false,
},
viewport
);
const worldPoints = annotation.data.contour.polyline;
// Note: Contours generate from fusedCanvasPoints will be in the direction
// with the last point being the current mouse position
annotation.data.handles.points = [
worldPoints[0],
worldPoints[worldPoints.length - 1],
];
annotation.data.handles.activeHandleIndex = 1;
triggerAnnotationModified(annotation, element);
this.isEditingOpen = false;
this.editData = undefined;
this.commonData = undefined;
// Jump to a normal line edit now.
this.deactivateOpenContourEdit(element);
this.activateOpenContourEndEdit(evt, annotation, viewportIdsToRender, null);
}
/**
* Checks if we are moving the `editCanvasPoints` past the end of one of the
* open contour's `prevCanvasPoint`s.
*/
function checkIfShouldOverwriteAnEnd(
evt: EventTypes.InteractionEventType
): boolean {
const eventDetail = evt.detail;
const { currentPoints, lastPoints } = eventDetail;
const canvasPos = currentPoints.canvas;
const lastCanvasPos = lastPoints.canvas;
const { snapIndex, prevCanvasPoints, startCrossingIndex } = this.editData;
if (startCrossingIndex === undefined || snapIndex === undefined) {
// Edit not started
return false;
}
// No snap index can be found, so contour is being edited away from line.
if (snapIndex === -1) {
return true;
}
if (snapIndex !== 0 && snapIndex !== prevCanvasPoints.length - 1) {
// Not snapping to final index
return false;
}
// Work out the angle between the last mouse move and
// And the current point to the snapped point.
const p1 = canvasPos;
const p2 = lastCanvasPos;
const p3 = prevCanvasPoints[snapIndex];
const a = vec2.create();
const b = vec2.create();
vec2.set(a, p1[0] - p2[0], p1[1] - p2[1]);
vec2.set(b, p1[0] - p3[0], p1[1] - p3[1]);
const aDotb = vec2.dot(a, b);
const magA = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
const magB = Math.sqrt(b[0] * b[0] + b[1] * b[1]);
const theta = Math.acos(aDotb / (magA * magB));
if (theta < Math.PI / 2) {
return true;
}
return false;
}
/**
* This method combines the contour before editing (prevCanvasPoints) with
* the current edit (editCanvasPoints), to produce a single contour ready for
* end editing.
*
* @privateRemarks In this method we use the following trick to find the
* optimal contour:
* - As the contour and the edit can be drawn with different chiralities, we find if
* the edit line aligns better with the intended cross points in its current order
* or reversed. We do this by minimising the distance between its ends and the
* intended crossing points.
*/
function fuseEditPointsForOpenContourEndEdit(): Types.Point2[] {
const { snapIndex, prevCanvasPoints, editCanvasPoints, startCrossingIndex } =
this.editData;
const newCanvasPoints = [];
// Note: Generated contours will both be in the direction with the
// last point being the current mouse position
if (snapIndex === 0) {
// end -> crossingpoint -> edit
// Add points from the end of the previous contour, to the crossing point.
for (let i = prevCanvasPoints.length - 1; i >= startCrossingIndex; i--) {
const canvasPoint = prevCanvasPoints[i];
newCanvasPoints.push([canvasPoint[0], canvasPoint[1]]);
}
} else {
// start -> crossingpoint -> edit
// Add points from the orignal contour origin up to the low index.
for (let i = 0; i < startCrossingIndex; i++) {
const canvasPoint = prevCanvasPoints[i];
newCanvasPoints.push([canvasPoint[0], canvasPoint[1]]);
}
}
const distanceBetweenCrossingIndexAndFirstPoint = vec2.distance(
prevCanvasPoints[startCrossingIndex],
editCanvasPoints[0]
);
const distanceBetweenCrossingIndexAndLastPoint = vec2.distance(
prevCanvasPoints[startCrossingIndex],
editCanvasPoints[editCanvasPoints.length - 1]
);
if (
distanceBetweenCrossingIndexAndFirstPoint <
distanceBetweenCrossingIndexAndLastPoint
) {
// In order
for (let i = 0; i < editCanvasPoints.length; i++) {
const canvasPoint = editCanvasPoints[i];
newCanvasPoints.push([canvasPoint[0], canvasPoint[1]]);
}
} else {
// reverse
for (let i = editCanvasPoints.length - 1; i >= 0; i--) {
const canvasPoint = editCanvasPoints[i];
newCanvasPoints.push([canvasPoint[0], canvasPoint[1]]);
}
}
return newCanvasPoints;
}
/**
* This method combines the contour before editing (prevCanvasPoints) with
* the current edit (editCanvasPoints), to produce a renderable preview of the
* edit. Upon finishing the contour, the preview generated here is written back
* into the contour state.
*
* @privateRemarks In this method we use the following trick to find the
* optimal contour:
* - As the contour and the edit can be drawn with different chiralities, we find if
* the edit line aligns better with the intended cross points in its current order
* or reversed. We do this by minimising the distance between its ends and the
* intended crossing points.
*/
function fuseEditPointsWithOpenContour(
evt: EventTypes.InteractionEventType
): Types.Point2[] {
const { prevCanvasPoints, editCanvasPoints, startCrossingIndex, snapIndex } =
this.editData;
if (startCrossingIndex === undefined || snapIndex === undefined) {
return undefined;
}
const eventDetail = evt.detail;
const { element } = eventDetail;
// Augment the editCanvasPoints array, between the end of edit and the snap index.
const augmentedEditCanvasPoints = [...editCanvasPoints];
addCanvasPointsToArray(
element,
augmentedEditCanvasPoints,
prevCanvasPoints[snapIndex],
this.commonData
);
if (augmentedEditCanvasPoints.length > editCanvasPoints.length) {
// If any points added, remove the last point, which will be a clone of the snapIndex
augmentedEditCanvasPoints.pop();
}
// Calculate the distances between the first and last edit points and the origin of the
// Contour with the snap point. These will be used to see which way around the edit array should be
// Placed within the preview.
let lowIndex;
let highIndex;
if (startCrossingIndex > snapIndex) {
lowIndex = snapIndex;
highIndex = startCrossingIndex;
} else {
lowIndex = startCrossingIndex;
highIndex = snapIndex;
}
const distanceBetweenLowAndFirstPoint = vec2.distance(
prevCanvasPoints[lowIndex],
augmentedEditCanvasPoints[0]
);
const distanceBetweenLowAndLastPoint = vec2.distance(
prevCanvasPoints[lowIndex],
augmentedEditCanvasPoints[augmentedEditCanvasPoints.length - 1]
);
const distanceBetweenHighAndFirstPoint = vec2.distance(
prevCanvasPoints[highIndex],
augmentedEditCanvasPoints[0]
);
const distanceBetweenHighAndLastPoint = vec2.distance(
prevCanvasPoints[highIndex],
augmentedEditCanvasPoints[augmentedEditCanvasPoints.length - 1]
);
const pointsToRender = [];
// Add points from the orignal contour origin up to the low index.
for (let i = 0; i < lowIndex; i++) {
const canvasPoint = prevCanvasPoints[i];
pointsToRender.push([canvasPoint[0], canvasPoint[1]]);
}
// Check which orientation of the edit line minimizes the distance between the
// origial contour low/high points and the start/end nodes of the edit line.
const inPlaceDistance =
distanceBetweenLowAndFirstPoint + distanceBetweenHighAndLastPoint;
const reverseDistance =
distanceBetweenLowAndLastPoint + distanceBetweenHighAndFirstPoint;
if (inPlaceDistance < reverseDistance) {
for (let i = 0; i < augmentedEditCanvasPoints.length; i++) {
const canvasPoint = augmentedEditCanvasPoints[i];
pointsToRender.push([canvasPoint[0], canvasPoint[1]]);
}
} else {
for (let i = augmentedEditCanvasPoints.length - 1; i >= 0; i--) {
const canvasPoint = augmentedEditCanvasPoints[i];
pointsToRender.push([canvasPoint[0], canvasPoint[1]]);
}
}
// Add points from the original contour's high index up to to its end point.
for (let i = highIndex; i < prevCanvasPoints.length; i++) {
const canvasPoint = prevCanvasPoints[i];
pointsToRender.push([canvasPoint[0], canvasPoint[1]]);
}
return pointsToRender;
}
/**
* On a second crossing, apply edit, and start a new edit from the crossing.
*/
function finishEditOpenOnSecondCrossing(
evt: EventTypes.InteractionEventType
): void {
const eventDetail = evt.detail;
const { element } = eventDetail;
const enabledElement = getEnabledElement(element);
const { viewport, renderingEngine } = enabledElement;
const { annotation, viewportIdsToRender } = this.commonData;
const { fusedCanvasPoints, editCanvasPoints } = this.editData;
updateContourPolyline(
annotation,
{
points: fusedCanvasPoints,
closed: false,
},
viewport
);
const worldPoints = annotation.data.contour.polyline;
annotation.data.handles.points = [
worldPoints[0],
worldPoints[worldPoints.length - 1],
];
triggerAnnotationModified(annotation, element);
const lastEditCanvasPoint = editCanvasPoints.pop();
this.editData = {
prevCanvasPoints: fusedCanvasPoints,
editCanvasPoints: [lastEditCanvasPoint],
startCrossingIndex: undefined,
editIndex: 0,
};
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
}
/**
* Completes the edit of the open contour when the mouse button is released.
*/
function mouseUpOpenContourEditCallback(
evt: EventTypes.InteractionEventType
): void {
const eventDetail = evt.detail;
const { element } = eventDetail;
this.completeOpenContourEdit(element);
}
/**
* Completes the edit of the open contour.
*/
function completeOpenContourEdit(element: HTMLDivElement) {
const enabledElement = getEnabledElement(element);
const { viewport, renderingEngine } = enabledElement;
const { annotation, viewportIdsToRender } = this.commonData;
const { fusedCanvasPoints, prevCanvasPoints } = this.editData;
if (fusedCanvasPoints) {
const updatedPoints = shouldSmooth(this.configuration)
? getInterpolatedPoints(
this.configuration,
fusedCanvasPoints,
prevCanvasPoints
)
: fusedCanvasPoints;
updateContourPolyline(
annotation,
{
points: updatedPoints,
closed: false,
},
viewport
);
const worldPoints = annotation.data.contour.polyline;
annotation.data.handles.points = [
worldPoints[0],
worldPoints[worldPoints.length - 1],
];
// If the annotation is an open U-shaped annotation, find the annotation vector.
if (annotation.data.isOpenUShapeContour) {
annotation.data.openUShapeContourVectorToPeak =
findOpenUShapedContourVectorToPeak(fusedCanvasPoints, viewport);
}
triggerAnnotationModified(annotation, element);
}
this.isEditingOpen = false;
this.editData = undefined;
this.commonData = undefined;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
this.deactivateOpenContourEdit(element);
}
/**
* Completes the edit on a cancel method call during the open
* contour edit loop.
*/
function cancelOpenContourEdit(element: HTMLDivElement) {
this.completeOpenContourEdit(element);
}
/**
* Registers the open contour edit loop to the tool instance.
*/
function registerOpenContourEditLoop(toolInstance) {
toolInstance.activateOpenContourEdit =
activateOpenContourEdit.bind(toolInstance);
toolInstance.deactivateOpenContourEdit =
deactivateOpenContourEdit.bind(toolInstance);
toolInstance.mouseDragOpenContourEditCallback =
mouseDragOpenContourEditCallback.bind(toolInstance);
toolInstance.mouseUpOpenContourEditCallback =
mouseUpOpenContourEditCallback.bind(toolInstance);
toolInstance.fuseEditPointsWithOpenContour =
fuseEditPointsWithOpenContour.bind(toolInstance);
toolInstance.finishEditOpenOnSecondCrossing =
finishEditOpenOnSecondCrossing.bind(toolInstance);
toolInstance.checkIfShouldOverwriteAnEnd =
checkIfShouldOverwriteAnEnd.bind(toolInstance);
toolInstance.fuseEditPointsForOpenContourEndEdit =
fuseEditPointsForOpenContourEndEdit.bind(toolInstance);
toolInstance.openContourEditOverwriteEnd =
openContourEditOverwriteEnd.bind(toolInstance);
toolInstance.cancelOpenContourEdit = cancelOpenContourEdit.bind(toolInstance);
toolInstance.completeOpenContourEdit =
completeOpenContourEdit.bind(toolInstance);
}
export default registerOpenContourEditLoop;
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