📚 Documentação inicial do ALETHEIA

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- README.md: Visão geral do projeto

frontend/node_modules/framer-motion/dist/es/gestures/drag/VisualElementDragControls.mjs

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+import { invariant } from 'motion-utils';
+import { setDragLock } from 'motion-dom';
+import { PanSession } from '../pan/PanSession.mjs';
+import { isRefObject } from '../../utils/is-ref-object.mjs';
+import { addPointerEvent } from '../../events/add-pointer-event.mjs';
+import { applyConstraints, calcRelativeConstraints, resolveDragElastic, rebaseAxisConstraints, calcViewportConstraints, calcOrigin, defaultElastic } from './utils/constraints.mjs';
+import { createBox } from '../../projection/geometry/models.mjs';
+import { eachAxis } from '../../projection/utils/each-axis.mjs';
+import { measurePageBox } from '../../projection/utils/measure.mjs';
+import { extractEventInfo } from '../../events/event-info.mjs';
+import { convertBoxToBoundingBox, convertBoundingBoxToBox } from '../../projection/geometry/conversion.mjs';
+import { addDomEvent } from '../../events/add-dom-event.mjs';
+import { calcLength } from '../../projection/geometry/delta-calc.mjs';
+import { mixNumber } from '../../utils/mix/number.mjs';
+import { percent } from '../../value/types/numbers/units.mjs';
+import { animateMotionValue } from '../../animation/interfaces/motion-value.mjs';
+import { getContextWindow } from '../../utils/get-context-window.mjs';
+import { addValueToWillChange } from '../../value/use-will-change/add-will-change.mjs';
+import { frame } from '../../frameloop/frame.mjs';
+
+const elementDragControls = new WeakMap();
+/**
+ *
+ */
+// let latestPointerEvent: PointerEvent
+class VisualElementDragControls {
+    constructor(visualElement) {
+        this.openDragLock = null;
+        this.isDragging = false;
+        this.currentDirection = null;
+        this.originPoint = { x: 0, y: 0 };
+        /**
+         * The permitted boundaries of travel, in pixels.
+         */
+        this.constraints = false;
+        this.hasMutatedConstraints = false;
+        /**
+         * The per-axis resolved elastic values.
+         */
+        this.elastic = createBox();
+        this.visualElement = visualElement;
+    }
+    start(originEvent, { snapToCursor = false } = {}) {
+        /**
+         * Don't start dragging if this component is exiting
+         */
+        const { presenceContext } = this.visualElement;
+        if (presenceContext && presenceContext.isPresent === false)
+            return;
+        const onSessionStart = (event) => {
+            const { dragSnapToOrigin } = this.getProps();
+            // Stop or pause any animations on both axis values immediately. This allows the user to throw and catch
+            // the component.
+            dragSnapToOrigin ? this.pauseAnimation() : this.stopAnimation();
+            if (snapToCursor) {
+                this.snapToCursor(extractEventInfo(event).point);
+            }
+        };
+        const onStart = (event, info) => {
+            // Attempt to grab the global drag gesture lock - maybe make this part of PanSession
+            const { drag, dragPropagation, onDragStart } = this.getProps();
+            if (drag && !dragPropagation) {
+                if (this.openDragLock)
+                    this.openDragLock();
+                this.openDragLock = setDragLock(drag);
+                // If we don 't have the lock, don't start dragging
+                if (!this.openDragLock)
+                    return;
+            }
+            this.isDragging = true;
+            this.currentDirection = null;
+            this.resolveConstraints();
+            if (this.visualElement.projection) {
+                this.visualElement.projection.isAnimationBlocked = true;
+                this.visualElement.projection.target = undefined;
+            }
+            /**
+             * Record gesture origin
+             */
+            eachAxis((axis) => {
+                let current = this.getAxisMotionValue(axis).get() || 0;
+                /**
+                 * If the MotionValue is a percentage value convert to px
+                 */
+                if (percent.test(current)) {
+                    const { projection } = this.visualElement;
+                    if (projection && projection.layout) {
+                        const measuredAxis = projection.layout.layoutBox[axis];
+                        if (measuredAxis) {
+                            const length = calcLength(measuredAxis);
+                            current = length * (parseFloat(current) / 100);
+                        }
+                    }
+                }
+                this.originPoint[axis] = current;
+            });
+            // Fire onDragStart event
+            if (onDragStart) {
+                frame.postRender(() => onDragStart(event, info));
+            }
+            addValueToWillChange(this.visualElement, "transform");
+            const { animationState } = this.visualElement;
+            animationState && animationState.setActive("whileDrag", true);
+        };
+        const onMove = (event, info) => {
+            // latestPointerEvent = event
+            const { dragPropagation, dragDirectionLock, onDirectionLock, onDrag, } = this.getProps();
+            // If we didn't successfully receive the gesture lock, early return.
+            if (!dragPropagation && !this.openDragLock)
+                return;
+            const { offset } = info;
+            // Attempt to detect drag direction if directionLock is true
+            if (dragDirectionLock && this.currentDirection === null) {
+                this.currentDirection = getCurrentDirection(offset);
+                // If we've successfully set a direction, notify listener
+                if (this.currentDirection !== null) {
+                    onDirectionLock && onDirectionLock(this.currentDirection);
+                }
+                return;
+            }
+            // Update each point with the latest position
+            this.updateAxis("x", info.point, offset);
+            this.updateAxis("y", info.point, offset);
+            /**
+             * Ideally we would leave the renderer to fire naturally at the end of
+             * this frame but if the element is about to change layout as the result
+             * of a re-render we want to ensure the browser can read the latest
+             * bounding box to ensure the pointer and element don't fall out of sync.
+             */
+            this.visualElement.render();
+            /**
+             * This must fire after the render call as it might trigger a state
+             * change which itself might trigger a layout update.
+             */
+            onDrag && onDrag(event, info);
+        };
+        const onSessionEnd = (event, info) => this.stop(event, info);
+        const resumeAnimation = () => eachAxis((axis) => {
+            var _a;
+            return this.getAnimationState(axis) === "paused" &&
+                ((_a = this.getAxisMotionValue(axis).animation) === null || _a === void 0 ? void 0 : _a.play());
+        });
+        const { dragSnapToOrigin } = this.getProps();
+        this.panSession = new PanSession(originEvent, {
+            onSessionStart,
+            onStart,
+            onMove,
+            onSessionEnd,
+            resumeAnimation,
+        }, {
+            transformPagePoint: this.visualElement.getTransformPagePoint(),
+            dragSnapToOrigin,
+            contextWindow: getContextWindow(this.visualElement),
+        });
+    }
+    stop(event, info) {
+        const isDragging = this.isDragging;
+        this.cancel();
+        if (!isDragging)
+            return;
+        const { velocity } = info;
+        this.startAnimation(velocity);
+        const { onDragEnd } = this.getProps();
+        if (onDragEnd) {
+            frame.postRender(() => onDragEnd(event, info));
+        }
+    }
+    cancel() {
+        this.isDragging = false;
+        const { projection, animationState } = this.visualElement;
+        if (projection) {
+            projection.isAnimationBlocked = false;
+        }
+        this.panSession && this.panSession.end();
+        this.panSession = undefined;
+        const { dragPropagation } = this.getProps();
+        if (!dragPropagation && this.openDragLock) {
+            this.openDragLock();
+            this.openDragLock = null;
+        }
+        animationState && animationState.setActive("whileDrag", false);
+    }
+    updateAxis(axis, _point, offset) {
+        const { drag } = this.getProps();
+        // If we're not dragging this axis, do an early return.
+        if (!offset || !shouldDrag(axis, drag, this.currentDirection))
+            return;
+        const axisValue = this.getAxisMotionValue(axis);
+        let next = this.originPoint[axis] + offset[axis];
+        // Apply constraints
+        if (this.constraints && this.constraints[axis]) {
+            next = applyConstraints(next, this.constraints[axis], this.elastic[axis]);
+        }
+        axisValue.set(next);
+    }
+    resolveConstraints() {
+        var _a;
+        const { dragConstraints, dragElastic } = this.getProps();
+        const layout = this.visualElement.projection &&
+            !this.visualElement.projection.layout
+            ? this.visualElement.projection.measure(false)
+            : (_a = this.visualElement.projection) === null || _a === void 0 ? void 0 : _a.layout;
+        const prevConstraints = this.constraints;
+        if (dragConstraints && isRefObject(dragConstraints)) {
+            if (!this.constraints) {
+                this.constraints = this.resolveRefConstraints();
+            }
+        }
+        else {
+            if (dragConstraints && layout) {
+                this.constraints = calcRelativeConstraints(layout.layoutBox, dragConstraints);
+            }
+            else {
+                this.constraints = false;
+            }
+        }
+        this.elastic = resolveDragElastic(dragElastic);
+        /**
+         * If we're outputting to external MotionValues, we want to rebase the measured constraints
+         * from viewport-relative to component-relative.
+         */
+        if (prevConstraints !== this.constraints &&
+            layout &&
+            this.constraints &&
+            !this.hasMutatedConstraints) {
+            eachAxis((axis) => {
+                if (this.constraints !== false &&
+                    this.getAxisMotionValue(axis)) {
+                    this.constraints[axis] = rebaseAxisConstraints(layout.layoutBox[axis], this.constraints[axis]);
+                }
+            });
+        }
+    }
+    resolveRefConstraints() {
+        const { dragConstraints: constraints, onMeasureDragConstraints } = this.getProps();
+        if (!constraints || !isRefObject(constraints))
+            return false;
+        const constraintsElement = constraints.current;
+        invariant(constraintsElement !== null, "If `dragConstraints` is set as a React ref, that ref must be passed to another component's `ref` prop.");
+        const { projection } = this.visualElement;
+        // TODO
+        if (!projection || !projection.layout)
+            return false;
+        const constraintsBox = measurePageBox(constraintsElement, projection.root, this.visualElement.getTransformPagePoint());
+        let measuredConstraints = calcViewportConstraints(projection.layout.layoutBox, constraintsBox);
+        /**
+         * If there's an onMeasureDragConstraints listener we call it and
+         * if different constraints are returned, set constraints to that
+         */
+        if (onMeasureDragConstraints) {
+            const userConstraints = onMeasureDragConstraints(convertBoxToBoundingBox(measuredConstraints));
+            this.hasMutatedConstraints = !!userConstraints;
+            if (userConstraints) {
+                measuredConstraints = convertBoundingBoxToBox(userConstraints);
+            }
+        }
+        return measuredConstraints;
+    }
+    startAnimation(velocity) {
+        const { drag, dragMomentum, dragElastic, dragTransition, dragSnapToOrigin, onDragTransitionEnd, } = this.getProps();
+        const constraints = this.constraints || {};
+        const momentumAnimations = eachAxis((axis) => {
+            if (!shouldDrag(axis, drag, this.currentDirection)) {
+                return;
+            }
+            let transition = (constraints && constraints[axis]) || {};
+            if (dragSnapToOrigin)
+                transition = { min: 0, max: 0 };
+            /**
+             * Overdamp the boundary spring if `dragElastic` is disabled. There's still a frame
+             * of spring animations so we should look into adding a disable spring option to `inertia`.
+             * We could do something here where we affect the `bounceStiffness` and `bounceDamping`
+             * using the value of `dragElastic`.
+             */
+            const bounceStiffness = dragElastic ? 200 : 1000000;
+            const bounceDamping = dragElastic ? 40 : 10000000;
+            const inertia = {
+                type: "inertia",
+                velocity: dragMomentum ? velocity[axis] : 0,
+                bounceStiffness,
+                bounceDamping,
+                timeConstant: 750,
+                restDelta: 1,
+                restSpeed: 10,
+                ...dragTransition,
+                ...transition,
+            };
+            // If we're not animating on an externally-provided `MotionValue` we can use the
+            // component's animation controls which will handle interactions with whileHover (etc),
+            // otherwise we just have to animate the `MotionValue` itself.
+            return this.startAxisValueAnimation(axis, inertia);
+        });
+        // Run all animations and then resolve the new drag constraints.
+        return Promise.all(momentumAnimations).then(onDragTransitionEnd);
+    }
+    startAxisValueAnimation(axis, transition) {
+        const axisValue = this.getAxisMotionValue(axis);
+        addValueToWillChange(this.visualElement, axis);
+        return axisValue.start(animateMotionValue(axis, axisValue, 0, transition, this.visualElement, false));
+    }
+    stopAnimation() {
+        eachAxis((axis) => this.getAxisMotionValue(axis).stop());
+    }
+    pauseAnimation() {
+        eachAxis((axis) => { var _a; return (_a = this.getAxisMotionValue(axis).animation) === null || _a === void 0 ? void 0 : _a.pause(); });
+    }
+    getAnimationState(axis) {
+        var _a;
+        return (_a = this.getAxisMotionValue(axis).animation) === null || _a === void 0 ? void 0 : _a.state;
+    }
+    /**
+     * Drag works differently depending on which props are provided.
+     *
+     * - If _dragX and _dragY are provided, we output the gesture delta directly to those motion values.
+     * - Otherwise, we apply the delta to the x/y motion values.
+     */
+    getAxisMotionValue(axis) {
+        const dragKey = `_drag${axis.toUpperCase()}`;
+        const props = this.visualElement.getProps();
+        const externalMotionValue = props[dragKey];
+        return externalMotionValue
+            ? externalMotionValue
+            : this.visualElement.getValue(axis, (props.initial
+                ? props.initial[axis]
+                : undefined) || 0);
+    }
+    snapToCursor(point) {
+        eachAxis((axis) => {
+            const { drag } = this.getProps();
+            // If we're not dragging this axis, do an early return.
+            if (!shouldDrag(axis, drag, this.currentDirection))
+                return;
+            const { projection } = this.visualElement;
+            const axisValue = this.getAxisMotionValue(axis);
+            if (projection && projection.layout) {
+                const { min, max } = projection.layout.layoutBox[axis];
+                axisValue.set(point[axis] - mixNumber(min, max, 0.5));
+            }
+        });
+    }
+    /**
+     * When the viewport resizes we want to check if the measured constraints
+     * have changed and, if so, reposition the element within those new constraints
+     * relative to where it was before the resize.
+     */
+    scalePositionWithinConstraints() {
+        if (!this.visualElement.current)
+            return;
+        const { drag, dragConstraints } = this.getProps();
+        const { projection } = this.visualElement;
+        if (!isRefObject(dragConstraints) || !projection || !this.constraints)
+            return;
+        /**
+         * Stop current animations as there can be visual glitching if we try to do
+         * this mid-animation
+         */
+        this.stopAnimation();
+        /**
+         * Record the relative position of the dragged element relative to the
+         * constraints box and save as a progress value.
+         */
+        const boxProgress = { x: 0, y: 0 };
+        eachAxis((axis) => {
+            const axisValue = this.getAxisMotionValue(axis);
+            if (axisValue && this.constraints !== false) {
+                const latest = axisValue.get();
+                boxProgress[axis] = calcOrigin({ min: latest, max: latest }, this.constraints[axis]);
+            }
+        });
+        /**
+         * Update the layout of this element and resolve the latest drag constraints
+         */
+        const { transformTemplate } = this.visualElement.getProps();
+        this.visualElement.current.style.transform = transformTemplate
+            ? transformTemplate({}, "")
+            : "none";
+        projection.root && projection.root.updateScroll();
+        projection.updateLayout();
+        this.resolveConstraints();
+        /**
+         * For each axis, calculate the current progress of the layout axis
+         * within the new constraints.
+         */
+        eachAxis((axis) => {
+            if (!shouldDrag(axis, drag, null))
+                return;
+            /**
+             * Calculate a new transform based on the previous box progress
+             */
+            const axisValue = this.getAxisMotionValue(axis);
+            const { min, max } = this.constraints[axis];
+            axisValue.set(mixNumber(min, max, boxProgress[axis]));
+        });
+    }
+    addListeners() {
+        if (!this.visualElement.current)
+            return;
+        elementDragControls.set(this.visualElement, this);
+        const element = this.visualElement.current;
+        /**
+         * Attach a pointerdown event listener on this DOM element to initiate drag tracking.
+         */
+        const stopPointerListener = addPointerEvent(element, "pointerdown", (event) => {
+            const { drag, dragListener = true } = this.getProps();
+            drag && dragListener && this.start(event);
+        });
+        const measureDragConstraints = () => {
+            const { dragConstraints } = this.getProps();
+            if (isRefObject(dragConstraints) && dragConstraints.current) {
+                this.constraints = this.resolveRefConstraints();
+            }
+        };
+        const { projection } = this.visualElement;
+        const stopMeasureLayoutListener = projection.addEventListener("measure", measureDragConstraints);
+        if (projection && !projection.layout) {
+            projection.root && projection.root.updateScroll();
+            projection.updateLayout();
+        }
+        frame.read(measureDragConstraints);
+        /**
+         * Attach a window resize listener to scale the draggable target within its defined
+         * constraints as the window resizes.
+         */
+        const stopResizeListener = addDomEvent(window, "resize", () => this.scalePositionWithinConstraints());
+        /**
+         * If the element's layout changes, calculate the delta and apply that to
+         * the drag gesture's origin point.
+         */
+        const stopLayoutUpdateListener = projection.addEventListener("didUpdate", (({ delta, hasLayoutChanged }) => {
+            if (this.isDragging && hasLayoutChanged) {
+                eachAxis((axis) => {
+                    const motionValue = this.getAxisMotionValue(axis);
+                    if (!motionValue)
+                        return;
+                    this.originPoint[axis] += delta[axis].translate;
+                    motionValue.set(motionValue.get() + delta[axis].translate);
+                });
+                this.visualElement.render();
+            }
+        }));
+        return () => {
+            stopResizeListener();
+            stopPointerListener();
+            stopMeasureLayoutListener();
+            stopLayoutUpdateListener && stopLayoutUpdateListener();
+        };
+    }
+    getProps() {
+        const props = this.visualElement.getProps();
+        const { drag = false, dragDirectionLock = false, dragPropagation = false, dragConstraints = false, dragElastic = defaultElastic, dragMomentum = true, } = props;
+        return {
+            ...props,
+            drag,
+            dragDirectionLock,
+            dragPropagation,
+            dragConstraints,
+            dragElastic,
+            dragMomentum,
+        };
+    }
+}
+function shouldDrag(direction, drag, currentDirection) {
+    return ((drag === true || drag === direction) &&
+        (currentDirection === null || currentDirection === direction));
+}
+/**
+ * Based on an x/y offset determine the current drag direction. If both axis' offsets are lower
+ * than the provided threshold, return `null`.
+ *
+ * @param offset - The x/y offset from origin.
+ * @param lockThreshold - (Optional) - the minimum absolute offset before we can determine a drag direction.
+ */
+function getCurrentDirection(offset, lockThreshold = 10) {
+    let direction = null;
+    if (Math.abs(offset.y) > lockThreshold) {
+        direction = "y";
+    }
+    else if (Math.abs(offset.x) > lockThreshold) {
+        direction = "x";
+    }
+    return direction;
+}
+
+export { VisualElementDragControls, elementDragControls };

frontend/node_modules/framer-motion/dist/es/gestures/drag/index.mjs

@@ -0,0 +1,27 @@
+import { Feature } from '../../motion/features/Feature.mjs';
+import { noop } from 'motion-utils';
+import { VisualElementDragControls } from './VisualElementDragControls.mjs';
+
+class DragGesture extends Feature {
+    constructor(node) {
+        super(node);
+        this.removeGroupControls = noop;
+        this.removeListeners = noop;
+        this.controls = new VisualElementDragControls(node);
+    }
+    mount() {
+        // If we've been provided a DragControls for manual control over the drag gesture,
+        // subscribe this component to it on mount.
+        const { dragControls } = this.node.getProps();
+        if (dragControls) {
+            this.removeGroupControls = dragControls.subscribe(this.controls);
+        }
+        this.removeListeners = this.controls.addListeners() || noop;
+    }
+    unmount() {
+        this.removeGroupControls();
+        this.removeListeners();
+    }
+}
+
+export { DragGesture };

frontend/node_modules/framer-motion/dist/es/gestures/drag/use-drag-controls.mjs

@@ -0,0 +1,88 @@
+import { useConstant } from '../../utils/use-constant.mjs';
+
+/**
+ * Can manually trigger a drag gesture on one or more `drag`-enabled `motion` components.
+ *
+ * ```jsx
+ * const dragControls = useDragControls()
+ *
+ * function startDrag(event) {
+ *   dragControls.start(event, { snapToCursor: true })
+ * }
+ *
+ * return (
+ *   <>
+ *     <div onPointerDown={startDrag} />
+ *     <motion.div drag="x" dragControls={dragControls} />
+ *   </>
+ * )
+ * ```
+ *
+ * @public
+ */
+class DragControls {
+    constructor() {
+        this.componentControls = new Set();
+    }
+    /**
+     * Subscribe a component's internal `VisualElementDragControls` to the user-facing API.
+     *
+     * @internal
+     */
+    subscribe(controls) {
+        this.componentControls.add(controls);
+        return () => this.componentControls.delete(controls);
+    }
+    /**
+     * Start a drag gesture on every `motion` component that has this set of drag controls
+     * passed into it via the `dragControls` prop.
+     *
+     * ```jsx
+     * dragControls.start(e, {
+     *   snapToCursor: true
+     * })
+     * ```
+     *
+     * @param event - PointerEvent
+     * @param options - Options
+     *
+     * @public
+     */
+    start(event, options) {
+        this.componentControls.forEach((controls) => {
+            controls.start(event.nativeEvent || event, options);
+        });
+    }
+}
+const createDragControls = () => new DragControls();
+/**
+ * Usually, dragging is initiated by pressing down on a `motion` component with a `drag` prop
+ * and moving it. For some use-cases, for instance clicking at an arbitrary point on a video scrubber, we
+ * might want to initiate that dragging from a different component than the draggable one.
+ *
+ * By creating a `dragControls` using the `useDragControls` hook, we can pass this into
+ * the draggable component's `dragControls` prop. It exposes a `start` method
+ * that can start dragging from pointer events on other components.
+ *
+ * ```jsx
+ * const dragControls = useDragControls()
+ *
+ * function startDrag(event) {
+ *   dragControls.start(event, { snapToCursor: true })
+ * }
+ *
+ * return (
+ *   <>
+ *     <div onPointerDown={startDrag} />
+ *     <motion.div drag="x" dragControls={dragControls} />
+ *   </>
+ * )
+ * ```
+ *
+ * @public
+ */
+function useDragControls() {
+    return useConstant(createDragControls);
+}
+
+export { DragControls, useDragControls };

frontend/node_modules/framer-motion/dist/es/gestures/drag/utils/constraints.mjs

@@ -0,0 +1,129 @@
+import { progress } from 'motion-utils';
+import { calcLength } from '../../../projection/geometry/delta-calc.mjs';
+import { clamp } from '../../../utils/clamp.mjs';
+import { mixNumber } from '../../../utils/mix/number.mjs';
+
+/**
+ * Apply constraints to a point. These constraints are both physical along an
+ * axis, and an elastic factor that determines how much to constrain the point
+ * by if it does lie outside the defined parameters.
+ */
+function applyConstraints(point, { min, max }, elastic) {
+    if (min !== undefined && point < min) {
+        // If we have a min point defined, and this is outside of that, constrain
+        point = elastic
+            ? mixNumber(min, point, elastic.min)
+            : Math.max(point, min);
+    }
+    else if (max !== undefined && point > max) {
+        // If we have a max point defined, and this is outside of that, constrain
+        point = elastic
+            ? mixNumber(max, point, elastic.max)
+            : Math.min(point, max);
+    }
+    return point;
+}
+/**
+ * Calculate constraints in terms of the viewport when defined relatively to the
+ * measured axis. This is measured from the nearest edge, so a max constraint of 200
+ * on an axis with a max value of 300 would return a constraint of 500 - axis length
+ */
+function calcRelativeAxisConstraints(axis, min, max) {
+    return {
+        min: min !== undefined ? axis.min + min : undefined,
+        max: max !== undefined
+            ? axis.max + max - (axis.max - axis.min)
+            : undefined,
+    };
+}
+/**
+ * Calculate constraints in terms of the viewport when
+ * defined relatively to the measured bounding box.
+ */
+function calcRelativeConstraints(layoutBox, { top, left, bottom, right }) {
+    return {
+        x: calcRelativeAxisConstraints(layoutBox.x, left, right),
+        y: calcRelativeAxisConstraints(layoutBox.y, top, bottom),
+    };
+}
+/**
+ * Calculate viewport constraints when defined as another viewport-relative axis
+ */
+function calcViewportAxisConstraints(layoutAxis, constraintsAxis) {
+    let min = constraintsAxis.min - layoutAxis.min;
+    let max = constraintsAxis.max - layoutAxis.max;
+    // If the constraints axis is actually smaller than the layout axis then we can
+    // flip the constraints
+    if (constraintsAxis.max - constraintsAxis.min <
+        layoutAxis.max - layoutAxis.min) {
+        [min, max] = [max, min];
+    }
+    return { min, max };
+}
+/**
+ * Calculate viewport constraints when defined as another viewport-relative box
+ */
+function calcViewportConstraints(layoutBox, constraintsBox) {
+    return {
+        x: calcViewportAxisConstraints(layoutBox.x, constraintsBox.x),
+        y: calcViewportAxisConstraints(layoutBox.y, constraintsBox.y),
+    };
+}
+/**
+ * Calculate a transform origin relative to the source axis, between 0-1, that results
+ * in an asthetically pleasing scale/transform needed to project from source to target.
+ */
+function calcOrigin(source, target) {
+    let origin = 0.5;
+    const sourceLength = calcLength(source);
+    const targetLength = calcLength(target);
+    if (targetLength > sourceLength) {
+        origin = progress(target.min, target.max - sourceLength, source.min);
+    }
+    else if (sourceLength > targetLength) {
+        origin = progress(source.min, source.max - targetLength, target.min);
+    }
+    return clamp(0, 1, origin);
+}
+/**
+ * Rebase the calculated viewport constraints relative to the layout.min point.
+ */
+function rebaseAxisConstraints(layout, constraints) {
+    const relativeConstraints = {};
+    if (constraints.min !== undefined) {
+        relativeConstraints.min = constraints.min - layout.min;
+    }
+    if (constraints.max !== undefined) {
+        relativeConstraints.max = constraints.max - layout.min;
+    }
+    return relativeConstraints;
+}
+const defaultElastic = 0.35;
+/**
+ * Accepts a dragElastic prop and returns resolved elastic values for each axis.
+ */
+function resolveDragElastic(dragElastic = defaultElastic) {
+    if (dragElastic === false) {
+        dragElastic = 0;
+    }
+    else if (dragElastic === true) {
+        dragElastic = defaultElastic;
+    }
+    return {
+        x: resolveAxisElastic(dragElastic, "left", "right"),
+        y: resolveAxisElastic(dragElastic, "top", "bottom"),
+    };
+}
+function resolveAxisElastic(dragElastic, minLabel, maxLabel) {
+    return {
+        min: resolvePointElastic(dragElastic, minLabel),
+        max: resolvePointElastic(dragElastic, maxLabel),
+    };
+}
+function resolvePointElastic(dragElastic, label) {
+    return typeof dragElastic === "number"
+        ? dragElastic
+        : dragElastic[label] || 0;
+}
+
+export { applyConstraints, calcOrigin, calcRelativeAxisConstraints, calcRelativeConstraints, calcViewportAxisConstraints, calcViewportConstraints, defaultElastic, rebaseAxisConstraints, resolveAxisElastic, resolveDragElastic, resolvePointElastic };