Add api endpoint to determine the distance that a token has moved already

src/api.js

@@ -1,5 +1,8 @@
+import {measureDistances} from "./compatibility.js";
+import {getMovementHistory} from "./movement_tracking.js";
 import {GenericSpeedProvider, SpeedProvider} from "./speed_provider.js"
 import {settingsKey} from "./settings.js"
+import {getTokenShape} from "./util.js";
 
 export const availableSpeedProviders = {}
 export let currentSpeedProvider = undefined
@@ -104,6 +107,15 @@ export function getCostFromSpeedProvider(token, area) {
 	return currentSpeedProvider.getCostForStep(token, area);
 }
 
+export function getMovedDistanceFromToken(token) {
+	const history = getMovementHistory(token);
+	const segments = Ruler.dragRulerGetRaysFromWaypoints(history, {x: token.x, y: token.y}).map(ray => {return {ray}});
+	const shape = getTokenShape(token);
+	const distances = measureDistances(segments, token, shape);
+	// Sum up the distances
+	return distances.reduce((acc, val) => acc + val, 0);
+}
+
 export function registerModule(moduleId, speedProvider) {
 	// Check if a module with the given id exists and is currently enabled
 	const module = game.modules.get(moduleId)

src/compatibility.js

@@ -1,5 +1,6 @@
+import {getCostFromSpeedProvider} from "./api.js";
 import {getColorForDistance} from "./main.js"
-import {highlightTokenShape} from "./util.js"
+import {getAreaFromPositionAndShape, highlightTokenShape} from "./util.js";
 
 export function getHexSizeSupportTokenGridCenter(token) {
 	const tokenCenterOffset = CONFIG.hexSizeSupport.getCenterOffset(token)
@@ -12,3 +13,11 @@ export function highlightMeasurementTerrainRuler(ray, startDistance, tokenShape=
 		highlightTokenShape.call(this, space, tokenShape, color, alpha)
 	}
 }
+
+export function measureDistances(segments, token, shape, gridSpaces=true) {
+	const terrainRulerAvailable = game.modules.get("terrain-ruler")?.active && canvas.grid.type !== CONST.GRID_TYPES.GRIDLESS;
+	if (terrainRulerAvailable)
+		return game.terrainRuler.measureDistances(segments, {costFunction: (x, y) => getCostFromSpeedProvider(token, getAreaFromPositionAndShape({x, y}, shape), {x, y})});
+	else
+		return canvas.grid.measureDistances(segments, { gridSpaces });
+}

src/foundry_imports.js

@@ -1,9 +1,8 @@
-import { getCostFromSpeedProvider } from "./api.js";
+import {highlightMeasurementTerrainRuler, measureDistances} from "./compatibility.js";
-import {highlightMeasurementTerrainRuler} from "./compatibility.js";
 import {getGridPositionFromPixels} from "./foundry_fixes.js";
 import {getColorForDistance} from "./main.js"
 import {trackRays} from "./movement_tracking.js"
-import {applyTokenSizeOffset, getAreaFromPositionAndShape, getSnapPointForToken, getTokenShape, highlightTokenShape, zip} from "./util.js";
+import {applyTokenSizeOffset, getSnapPointForToken, getTokenShape, highlightTokenShape, zip} from "./util.js";
 
 // This is a modified version of Ruler.moveToken from foundry 0.7.9
 export async function moveTokens(draggedToken, selectedTokens) {
@@ -17,7 +16,7 @@ export async function moveTokens(draggedToken, selectedTokens) {
 
 	// Get the movement rays and check collision along each Ray
 	// These rays are center-to-center for the purposes of collision checking
-	const rays = this.dragRulerGetRaysFromWaypoints(this.waypoints, this.destination);
+	const rays = this.constructor.dragRulerGetRaysFromWaypoints(this.waypoints, this.destination);
 	if (!game.user.isGM) {
 		const hasCollision = selectedTokens.some(token => {
 			const offset = calculateTokenOffset(token, draggedToken)
@@ -149,11 +148,7 @@ export function measure(destination, {gridSpaces=true, snap=false} = {}) {
 	const shape = getTokenShape(this.draggedToken)
 
 	// Compute measured distance
-	let distances
+	const distances = measureDistances(centeredSegments, this.draggedToken, shape, gridSpaces);
-	if (terrainRulerAvailable)
-		distances = game.terrainRuler.measureDistances(centeredSegments, {costFunction: (x, y) => getCostFromSpeedProvider(this.draggedToken, getAreaFromPositionAndShape({x, y}, shape), {x, y})});
-	else
-		distances = canvas.grid.measureDistances(centeredSegments, { gridSpaces });
 
 	let totalDistance = 0;
 	for (let [i, d] of distances.entries()) {

src/main.js

@@ -1,6 +1,6 @@
 "use strict"
 
-import {currentSpeedProvider, getRangesFromSpeedProvider, getUnreachableColorFromSpeedProvider, initApi, registerModule, registerSystem} from "./api.js"
+import {currentSpeedProvider, getMovedDistanceFromToken, getRangesFromSpeedProvider, getUnreachableColorFromSpeedProvider, initApi, registerModule, registerSystem} from "./api.js"
 import {getHexSizeSupportTokenGridCenter} from "./compatibility.js"
 import {moveTokens, onMouseMove} from "./foundry_imports.js"
 import {performMigrations} from "./migration.js"
@@ -19,6 +19,7 @@ Hooks.once("init", () => {
 
 	window.dragRuler = {
 		getColorForDistance,
+		getMovedDistanceFromToken,
 		registerModule,
 		registerSystem,
 	}

src/ruler.js

@@ -99,7 +99,7 @@ export class DragRulerRuler extends Ruler {
 		}
 	}
 
-	dragRulerGetRaysFromWaypoints(waypoints, destination) {
+	static dragRulerGetRaysFromWaypoints(waypoints, destination) {
 		if ( destination )
 			waypoints = waypoints.concat([destination]);
 		return waypoints.slice(1).map((wp, i) => {