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import get from 'lodash.get';
import cloneDeep from 'lodash.clonedeep';
import {
triggerEvent,
eventTarget,
getRenderingEngine,
getRenderingEngines,
getEnabledElementByIds,
Settings,
} from '@cornerstonejs/core';
import type { Types } from '@cornerstonejs/core';
import { Events } from '../../enums';
import {
ToolActivatedEventDetail,
ToolModeChangedEventDetail,
} from '../../types/EventTypes';
import { ToolGroupManager, state } from '../index';
import {
IToolBinding,
IToolClassReference,
IToolGroup,
SetToolBindingsType,
ToolOptionsType,
ToolConfiguration,
} from '../../types';
import { MouseCursor, SVGMouseCursor } from '../../cursors';
import { initElementCursor } from '../../cursors/elementCursor';
const { Active, Passive, Enabled, Disabled } = ToolModes;
const PRIMARY_BINDINGS = [{ mouseButton: MouseBindings.Primary }];
/**
* ToolGroup class which is a container for tools and their modes and states.
* In Cornerstone3DTools, you need to create a tool group in order to use the
* tools. ToolGroup is a way to share tool configuration, state (enabled, disabled, etc.)
* across a set of viewports. Tools can set to be activated, enabled or disabled
* in a toolGroup. You should not directly instantiate a ToolGroup. You need to use
* ToolGroupManager helpers to create a new toolGroup or get a reference to an existing toolGroup.
*
* ```js
* const toolGroup = csTools.ToolGroupManager.createToolGroup('toolGroupId')
* ```
*/
export default class ToolGroup implements IToolGroup {
id: string;
viewportsInfo = [];
toolOptions = {};
currentActivePrimaryToolName: string | null = null;
prevActivePrimaryToolName: string | null = null;
/**
* Options used for restoring a tool
*/
restoreToolOptions = {};
_toolInstances = {};
constructor(id: string) {
this.id = id;
}
/**
* Get the viewport IDs of all the viewports in the current viewport
* @returns An array of viewport IDs.
*/
getViewportIds(): string[] {
return this.viewportsInfo.map(({ viewportId }) => viewportId);
}
/**
* Returns the toolGroup viewports info which is an array of {viewportId, renderingEngineId}
*/
getViewportsInfo(): Array<Types.IViewportId> {
return this.viewportsInfo.slice();
}
/**
* Get the tool instance for a given tool name in the toolGroup
* @param toolName - The name of the tool.
* @returns A tool instance.
*/
public getToolInstance(toolInstanceName: string) {
const toolInstance = this._toolInstances[toolInstanceName];
if (!toolInstance) {
console.warn(
`'${toolInstanceName}' is not registered with this toolGroup (${this.id}).`
);
return;
}
return toolInstance;
}
/**
* Retrieves the tool instances associated with this tool group.
*
* @returns A record containing the tool instances, where the keys are the tool names and the values are the tool instances.
*/
public getToolInstances(): Record<string, any> {
return this._toolInstances;
}
/**
* Check if a tool is already added to the tool group
* @param toolName - Tool name
* @returns True if the tool is already added or false otherwise
*/
hasTool(toolName: string): boolean {
return !!this._toolInstances[toolName];
}
/**
* Add a tool to the tool group with the given tool name and tool configuration.
* Note that adding a tool to a tool group will not automatically set the tool
* to be active. You must call setToolActive or setToolPassive and other methods
* to set the tool to be active or passive or in other states.
*
* @param toolName - string
* @param configuration - Tool configuration objects and a custom statistics calculator if needed
*/
addTool(toolName: string, configuration: ToolConfiguration = {}): void {
const toolDefinition = state.tools[toolName];
const hasToolName = typeof toolName !== 'undefined' && toolName !== '';
const localToolInstance = this.toolOptions[toolName];
Iif (!hasToolName) {
console.warn(
'Tool with configuration did not produce a toolName: ',
configuration
);
return;
}
Iif (!toolDefinition) {
console.warn(
`'${toolName}' is not registered with the library. You need to use cornerstoneTools.addTool to register it.`
);
return;
}
Iif (localToolInstance) {
console.warn(
`'${toolName}' is already registered for ToolGroup ${this.id}.`
);
return;
}
// Should these be renamed higher up, so we don't have to alias?
// Wrap in try-catch so 3rd party tools don't explode?
const { toolClass: ToolClass } = toolDefinition;
const toolProps = {
name: toolName,
toolGroupId: this.id,
configuration,
};
const instantiatedTool = new ToolClass(toolProps);
// API instead of directly exposing schema?
// Maybe not here, but feels like a "must" for any method outside of the ToolGroup itself
this._toolInstances[toolName] = instantiatedTool;
}
public addToolInstance(
toolName: string,
parentClassName: string,
configuration = {}
): void {
let ToolClassToUse = state.tools[toolName]
?.toolClass as IToolClassReference;
Eif (!ToolClassToUse) {
// get parent class constructor
const ParentClass = state.tools[parentClassName]
.toolClass as IToolClassReference;
// Todo: could not find a way to make this work with typescript
// @ts-ignore
class ToolInstance extends ParentClass {}
// @ts-ignore
ToolInstance.toolName = toolName;
// @ts-ignore
ToolClassToUse = ToolInstance;
state.tools[toolName] = {
toolClass: ToolInstance as IToolClassReference,
};
}
// add the tool to the toolGroup
// @ts-ignore
this.addTool(ToolClassToUse.toolName, configuration);
}
// class InstanceTool extends parentClass;
// InstanceTool.constructor.toolName = name;
// addTool(InstanceTool,configuration)
/**
* Add a viewport to the ToolGroup. It accepts viewportId and optional
* renderingEngineId parameter. If renderingEngineId is not provided,
* it checks if cornerstone-core has more than one renderingEngine; If so,
* it will throw an error. If cornerstone-core has only one renderingEngine,
* it will use that renderingEngine.
*
* @param viewportId - The unique identifier for the viewport.
* @param renderingEngineId - The rendering engine to use.
*/
public addViewport(viewportId: string, renderingEngineId?: string): void {
Iif (typeof viewportId !== 'string') {
throw new Error('viewportId must be defined and be a string');
}
const renderingEngines = getRenderingEngines();
Iif (!renderingEngineId && renderingEngines.length > 1) {
throw new Error(
'You must specify a renderingEngineId when there are multiple rendering engines.'
);
}
const renderingEngineUIDToUse = renderingEngineId || renderingEngines[0].id;
// Don't overwrite if it already exists
Eif (
!this.viewportsInfo.some(({ viewportId: vpId }) => vpId === viewportId)
) {
this.viewportsInfo.push({
viewportId,
renderingEngineId: renderingEngineUIDToUse,
});
}
// Handle the newly added viewport's mouse cursor
const toolName = this.getActivePrimaryMouseButtonTool();
const runtimeSettings = Settings.getRuntimeSettings();
Eif (runtimeSettings.get('useCursors')) {
this.setViewportsCursorByToolName(toolName);
}
const eventDetail = {
toolGroupId: this.id,
viewportId,
renderingEngineId: renderingEngineUIDToUse,
};
triggerEvent(eventTarget, Events.TOOLGROUP_VIEWPORT_ADDED, eventDetail);
}
/**
* Removes viewport from the toolGroup. If only renderingEngineId is defined
* it removes all the viewports with the same renderingEngineId, if viewportId
* is also provided, it will remove that specific viewport from the ToolGroup.
*
* @param renderingEngineId - renderingEngine id
* @param viewportId - viewport id
*/
public removeViewports(renderingEngineId: string, viewportId?: string): void {
const indices = [];
this.viewportsInfo.forEach((vpInfo, index) => {
let match = false;
Eif (vpInfo.renderingEngineId === renderingEngineId) {
match = true;
if (viewportId && vpInfo.viewportId !== viewportId) {
match = false;
}
}
if (match) {
indices.push(index);
}
});
if (indices.length) {
// Note: Traverse the array backwards, such that when we remove items we
// do not immediately mess up our loop indicies.
for (let i = indices.length - 1; i >= 0; i--) {
this.viewportsInfo.splice(indices[i], 1);
}
}
const eventDetail = {
toolGroupId: this.id,
viewportId,
renderingEngineId,
};
triggerEvent(eventTarget, Events.TOOLGROUP_VIEWPORT_REMOVED, eventDetail);
}
public setActiveStrategy(toolName: string, strategyName: string) {
const toolInstance = this._toolInstances[toolName];
if (toolInstance === undefined) {
console.warn(
`Tool ${toolName} not added to toolGroup, can't set tool configuration.`
);
return;
}
toolInstance.setActiveStrategy(strategyName);
}
setToolMode(
toolName: string,
mode: ToolModes,
options = {} as SetToolBindingsType
): void {
if (!toolName) {
console.warn('setToolMode: toolName must be defined');
return;
}
if (mode === ToolModes.Active) {
this.setToolActive(
toolName,
options || this.restoreToolOptions[toolName]
);
return;
}
if (mode === ToolModes.Passive) {
this.setToolPassive(toolName);
return;
}
if (mode === ToolModes.Enabled) {
this.setToolEnabled(toolName);
return;
}
if (mode === ToolModes.Disabled) {
this.setToolDisabled(toolName);
return;
}
console.warn('setToolMode: mode must be defined');
}
/**
* Set the tool mode on the toolGroup to be Active. This means the tool
* can be actively used by the defined bindings (e.g., Mouse primary click)
*
* - Can be actively used by mouse/touch events mapped to its `ToolBinding`s.
* - Can add data if an annotation tool.
* - Can be passively interacted by grabbing a tool or its handles.
* - Renders data if the tool has a `renderAnnotation` method.
*
* @param toolName - tool name
* @param toolBindingsOptions - tool bindings
*/
public setToolActive(
toolName: string,
toolBindingsOptions = {} as SetToolBindingsType
): void {
const toolInstance = this._toolInstances[toolName];
if (toolInstance === undefined) {
console.warn(
`Tool ${toolName} not added to toolGroup, can't set tool mode.`
);
return;
}
Iif (!toolInstance) {
console.warn(
`'${toolName}' instance ${toolInstance} is not registered with this toolGroup, can't set tool mode.`
);
return;
}
const prevBindings: IToolBinding[] = this.toolOptions[toolName]
? this.toolOptions[toolName].bindings
: [];
const newBindings = toolBindingsOptions.bindings
? toolBindingsOptions.bindings
: [];
// combine the new bindings with the previous bindings to avoid duplicates
// it allows duplicated mouse buttons as long as they don't have same
// modifier keys.
const bindingsToUse = [...prevBindings, ...newBindings].reduce(
(unique, binding) => {
const TouchBinding = binding.numTouchPoints !== undefined;
const MouseBinding = binding.mouseButton !== undefined;
Eif (
!unique.some((obj) => hasSameBinding(obj, binding)) &&
(TouchBinding || MouseBinding)
) {
unique.push(binding);
}
return unique;
},
[]
);
// We should not override the bindings if they are already set
const toolOptions: ToolOptionsType = {
bindings: bindingsToUse,
mode: Active,
};
this.toolOptions[toolName] = toolOptions;
this._toolInstances[toolName].mode = Active;
// reset the mouse cursor if tool has left click binding
const runtimeSettings = Settings.getRuntimeSettings();
const useCursor = runtimeSettings.get('useCursors');
if (this._hasMousePrimaryButtonBinding(toolBindingsOptions) && useCursor) {
this.setViewportsCursorByToolName(toolName);
} else {
// reset to default cursor only if there is no other tool with primary binding
const activeToolIdentifier = this.getActivePrimaryMouseButtonTool();
Eif (!activeToolIdentifier && useCursor) {
const cursor = MouseCursor.getDefinedCursor('default');
this._setCursorForViewports(cursor);
}
}
// if it is a primary tool binding, we should store it as the previous primary tool
// so that we can restore it when the tool is disabled if desired
if (this._hasMousePrimaryButtonBinding(toolBindingsOptions)) {
if (this.prevActivePrimaryToolName === null) {
this.prevActivePrimaryToolName = toolName;
} else E{
this.prevActivePrimaryToolName = this.currentActivePrimaryToolName;
}
this.currentActivePrimaryToolName = toolName;
}
if (typeof toolInstance.onSetToolActive === 'function') {
toolInstance.onSetToolActive();
}
this._renderViewports();
const eventDetail: ToolActivatedEventDetail = {
toolGroupId: this.id,
toolName,
toolBindingsOptions,
};
triggerEvent(eventTarget, Events.TOOL_ACTIVATED, eventDetail);
this._triggerToolModeChangedEvent(toolName, Active, toolBindingsOptions);
}
/**
* Set the tool mode on the toolGroup to be Passive.
*
* - Can be passively interacted by grabbing a tool or its handles.
* - Renders data if the tool has a `renderAnnotation` method.
*
* @param toolName - tool name
* @param options - Options used when setting the tool as passive
* - removeAllBindings: only the primary button bindings are removed but
* if this parameter is set to true all bindings are removed.
*/
public setToolPassive(
toolName: string,
options?: { removeAllBindings?: boolean | IToolBinding[] }
): void {
const toolInstance = this._toolInstances[toolName];
if (toolInstance === undefined) {
console.warn(
`Tool ${toolName} not added to toolGroup, can't set tool mode.`
);
return;
}
// We should only remove the primary button bindings and keep
// the other ones (Zoom on right click)
const prevToolOptions = this.getToolOptions(toolName);
const toolOptions = Object.assign(
{
bindings: prevToolOptions ? prevToolOptions.bindings : [],
},
prevToolOptions,
{
mode: Passive,
}
);
const matchBindings = Array.isArray(options?.removeAllBindings)
? options.removeAllBindings
: this.getDefaultPrimaryBindings();
// Remove the primary button bindings without modifiers, if they exist
toolOptions.bindings = toolOptions.bindings.filter(
(binding) =>
options?.removeAllBindings !== true &&
!matchBindings.some((matchBinding) =>
hasSameBinding(binding, matchBinding)
)
//(binding.mouseButton !== defaultMousePrimary || binding.modifierKey)
);
// If there are other bindings, set the tool to be active
let mode = Passive;
Iif (toolOptions.bindings.length !== 0) {
mode = Active;
toolOptions.mode = mode;
}
this.toolOptions[toolName] = toolOptions;
toolInstance.mode = mode;
Iif (typeof toolInstance.onSetToolPassive === 'function') {
toolInstance.onSetToolPassive();
}
this._renderViewports();
// It would make sense to use `toolInstance.mode` as mode when setting a tool
// as passive because it can still be actived in the end but `Passive` must
// be used when synchronizing ToolGroups so that other ToolGroups can take the
// same action (update tool bindings). Should the event have two different modes
// to handle this special case?
this._triggerToolModeChangedEvent(toolName, Passive);
}
/**
* Set the tool mode on the toolGroup to be Enabled.
*
* - Renders data if the tool has a `renderAnnotation` method..
*
* @param toolName - tool name
*/
public setToolEnabled(toolName: string): void {
const toolInstance = this._toolInstances[toolName];
if (toolInstance === undefined) {
console.warn(
`Tool ${toolName} not added to toolGroup, can't set tool mode.`
);
return;
}
const toolOptions = {
bindings: [],
mode: Enabled,
};
this.toolOptions[toolName] = toolOptions;
toolInstance.mode = Enabled;
if (typeof toolInstance.onSetToolEnabled === 'function') {
toolInstance.onSetToolEnabled();
}
this._renderViewports();
this._triggerToolModeChangedEvent(toolName, Enabled);
}
/**
* Set the tool mode on the toolGroup to be Disabled.
*
* - Annotation does not render.
*
* @param toolName - tool name
*/
public setToolDisabled(toolName: string): void {
const toolInstance = this._toolInstances[toolName];
if (toolInstance === undefined) {
console.warn(
`Tool ${toolName} not added to toolGroup, can't set tool mode.`
);
return;
}
const toolOptions = {
bindings: [],
mode: Disabled,
};
this.restoreToolOptions[toolName] = this.toolOptions[toolName];
this.toolOptions[toolName] = toolOptions;
toolInstance.mode = Disabled;
Iif (typeof toolInstance.onSetToolDisabled === 'function') {
toolInstance.onSetToolDisabled();
}
this._renderViewports();
this._triggerToolModeChangedEvent(toolName, Disabled);
}
/**
* Get the options for a given tool
* @param toolName - The name of the tool.
* @returns the tool options
*/
public getToolOptions(toolName: string): ToolOptionsType {
const toolOptionsForTool = this.toolOptions[toolName];
if (toolOptionsForTool === undefined) {
return;
}
return toolOptionsForTool;
}
/**
* Find the name of the tool that is Active and has a primary button binding
* (Mouse primary click)
*
* @returns The name of the tool
*/
public getActivePrimaryMouseButtonTool(): string {
return Object.keys(this.toolOptions).find((toolName) => {
const toolOptions = this.toolOptions[toolName];
return (
toolOptions.mode === Active &&
this._hasMousePrimaryButtonBinding(toolOptions)
);
});
}
public setViewportsCursorByToolName(
toolName: string,
strategyName?: string
): void {
const cursor = this._getCursor(toolName, strategyName);
this._setCursorForViewports(cursor);
}
private _getCursor(toolName: string, strategyName?: string): MouseCursor {
let cursorName;
let cursor;
Iif (strategyName) {
// Try combinations with strategyName first:
// Try with toolName and toolInstanceName first.
cursorName = `${toolName}.${strategyName}`;
cursor = SVGMouseCursor.getDefinedCursor(cursorName, true);
if (cursor) {
return cursor;
}
}
// Try with toolName and toolInstanceName first.
cursorName = `${toolName}`;
cursor = SVGMouseCursor.getDefinedCursor(cursorName, true);
if (cursor) {
return cursor;
}
// Try with just toolName.
cursorName = toolName;
cursor = SVGMouseCursor.getDefinedCursor(cursorName, true);
Iif (cursor) {
return cursor;
}
return MouseCursor.getDefinedCursor('default');
}
_setCursorForViewports(cursor: MouseCursor): void {
this.viewportsInfo.forEach(({ renderingEngineId, viewportId }) => {
const enabledElement = getEnabledElementByIds(
viewportId,
renderingEngineId
);
Iif (!enabledElement) {
return;
}
const { viewport } = enabledElement;
initElementCursor(viewport.element, cursor);
});
}
/**
* Set a configuration of a tool by the given toolName.
* Use overwrite as true in case you want to overwrite any existing configuration (be careful, depending on config change it might break the annotation flow).
*/
public setToolConfiguration(
toolName: string,
configuration: ToolConfiguration,
overwrite?: boolean
): boolean {
const toolInstance = this._toolInstances[toolName];
if (toolInstance === undefined) {
console.warn(
`Tool ${toolName} not present, can't set tool configuration.`
);
return false;
}
let _configuration;
if (overwrite) {
_configuration = configuration;
} else {
// We should not deep copy here, it is the job of the application to
// deep copy the configuration before passing it to the toolGroup, otherwise
// some strange appending behaviour happens for the arrays
_configuration = Object.assign(toolInstance.configuration, configuration);
}
toolInstance.configuration = _configuration;
if (typeof toolInstance.onSetToolConfiguration === 'function') {
toolInstance.onSetToolConfiguration();
}
this._renderViewports();
return true;
}
/**
* Returns the default mouse primary button.
*/
public getDefaultMousePrimary(): MouseBindings {
return MouseBindings.Primary;
}
/**
* Gets an array of bindings that is the full primary binding.
* Currently this is just the primary mouse button, but may be extended in the
* future to include touch or other binding types.
*/
public getDefaultPrimaryBindings(): IToolBinding[] {
return PRIMARY_BINDINGS;
}
/**
* Get the configuration of tool. It returns only the config for the given path (in case exists).
* ConfigurationPath is the the path of the property to get separated by '.'.
*
* @example
* getToolConfiguration('LengthTool', 'firstLevel.secondLevel')
* // get from LengthTool instance the configuration value as being LengthToolInstance[configuration][firstLevel][secondLevel]
*/
getToolConfiguration(toolName: string, configurationPath?: string): any {
if (this._toolInstances[toolName] === undefined) {
console.warn(
`Tool ${toolName} not present, can't set tool configuration.`
);
return;
}
const _configuration =
get(this._toolInstances[toolName].configuration, configurationPath) ||
this._toolInstances[toolName].configuration;
return cloneDeep(_configuration);
}
/**
* Gets the name of the previously active tool.
* @returns The name of the previously active tool.
*/
public getPrevActivePrimaryToolName(): string {
return this.prevActivePrimaryToolName;
}
/**
*
* @param newToolGroupId - Id of the new (clone) tool group
* @param fnToolFilter - Function to filter which tools from this tool group
* should be added to the new (clone) one. Example: only annotations tools
* can be filtered and added to the new tool group.
* @returns A new tool group that is a clone of this one
*/
public clone(
newToolGroupId,
fnToolFilter: (toolName: string) => void = null
): IToolGroup {
let toolGroup = ToolGroupManager.getToolGroup(newToolGroupId);
if (toolGroup) {
console.warn(`ToolGroup ${newToolGroupId} already exists`);
return toolGroup;
}
toolGroup = ToolGroupManager.createToolGroup(newToolGroupId);
fnToolFilter = fnToolFilter ?? (() => true);
Object.keys(this._toolInstances)
.filter(fnToolFilter)
.forEach((toolName) => {
const sourceToolInstance = this._toolInstances[toolName];
const sourceToolOptions = this.toolOptions[toolName];
const sourceToolMode = sourceToolInstance.mode;
toolGroup.addTool(toolName);
(toolGroup as unknown as ToolGroup).setToolMode(
toolName,
sourceToolMode,
{
bindings: sourceToolOptions.bindings ?? [],
}
);
});
return toolGroup;
}
/**
* Check if the tool binding is set to be primary mouse button.
* @param toolOptions - The options for the tool mode.
* @returns A boolean value.
*/
private _hasMousePrimaryButtonBinding(toolOptions) {
const primaryBindings = this.getDefaultPrimaryBindings();
return toolOptions?.bindings?.some((binding) =>
primaryBindings.some((primary) => hasSameBinding(binding, primary))
);
}
/**
* It re-renders the viewports in the toolGroup
*/
private _renderViewports(): void {
this.viewportsInfo.forEach(({ renderingEngineId, viewportId }) => {
getRenderingEngine(renderingEngineId).renderViewport(viewportId);
});
}
/**
* Trigger ToolModeChangedEvent when changing the tool mode
* @param toolName - Tool name
* @param mode - Tool mode
* @param toolBindingsOptions - Binding options used when a tool is activated
*/
private _triggerToolModeChangedEvent(
toolName: string,
mode: ToolModes,
toolBindingsOptions?: SetToolBindingsType
): void {
const eventDetail: ToolModeChangedEventDetail = {
toolGroupId: this.id,
toolName,
mode,
toolBindingsOptions,
};
triggerEvent(eventTarget, Events.TOOL_MODE_CHANGED, eventDetail);
}
}
/**
* Figure out if the two bindings are the same
*/
function hasSameBinding(
binding1: IToolBinding,
binding2: IToolBinding
): boolean {
Iif (binding1.mouseButton !== binding2.mouseButton) {
return false;
}
Iif (binding1.numTouchPoints !== binding2.numTouchPoints) {
return false;
}
return binding1.modifierKey === binding2.modifierKey;
}
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