8 lines
14 KiB
Plaintext
8 lines
14 KiB
Plaintext
{
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"version": 3,
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"sources": ["../../svelte/src/motion/utils.js", "../../svelte/src/motion/spring.js", "../../svelte/src/motion/tweened.js"],
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"sourcesContent": ["/**\n * @param {any} obj\n * @returns {obj is Date}\n */\nexport function is_date(obj) {\n\treturn Object.prototype.toString.call(obj) === '[object Date]';\n}\n", "/** @import { Task } from '#client' */\n/** @import { SpringOpts, SpringUpdateOpts, TickContext } from './private.js' */\n/** @import { Spring } from './public.js' */\nimport { writable } from '../store/shared/index.js';\nimport { loop } from '../internal/client/loop.js';\nimport { raf } from '../internal/client/timing.js';\nimport { is_date } from './utils.js';\n\n/**\n * @template T\n * @param {TickContext<T>} ctx\n * @param {T} last_value\n * @param {T} current_value\n * @param {T} target_value\n * @returns {T}\n */\nfunction tick_spring(ctx, last_value, current_value, target_value) {\n\tif (typeof current_value === 'number' || is_date(current_value)) {\n\t\t// @ts-ignore\n\t\tconst delta = target_value - current_value;\n\t\t// @ts-ignore\n\t\tconst velocity = (current_value - last_value) / (ctx.dt || 1 / 60); // guard div by 0\n\t\tconst spring = ctx.opts.stiffness * delta;\n\t\tconst damper = ctx.opts.damping * velocity;\n\t\tconst acceleration = (spring - damper) * ctx.inv_mass;\n\t\tconst d = (velocity + acceleration) * ctx.dt;\n\t\tif (Math.abs(d) < ctx.opts.precision && Math.abs(delta) < ctx.opts.precision) {\n\t\t\treturn target_value; // settled\n\t\t} else {\n\t\t\tctx.settled = false; // signal loop to keep ticking\n\t\t\t// @ts-ignore\n\t\t\treturn is_date(current_value) ? new Date(current_value.getTime() + d) : current_value + d;\n\t\t}\n\t} else if (Array.isArray(current_value)) {\n\t\t// @ts-ignore\n\t\treturn current_value.map((_, i) =>\n\t\t\t// @ts-ignore\n\t\t\ttick_spring(ctx, last_value[i], current_value[i], target_value[i])\n\t\t);\n\t} else if (typeof current_value === 'object') {\n\t\tconst next_value = {};\n\t\tfor (const k in current_value) {\n\t\t\t// @ts-ignore\n\t\t\tnext_value[k] = tick_spring(ctx, last_value[k], current_value[k], target_value[k]);\n\t\t}\n\t\t// @ts-ignore\n\t\treturn next_value;\n\t} else {\n\t\tthrow new Error(`Cannot spring ${typeof current_value} values`);\n\t}\n}\n\n/**\n * The spring function in Svelte creates a store whose value is animated, with a motion that simulates the behavior of a spring. This means when the value changes, instead of transitioning at a steady rate, it \"bounces\" like a spring would, depending on the physics parameters provided. This adds a level of realism to the transitions and can enhance the user experience.\n *\n * @template [T=any]\n * @param {T} [value]\n * @param {SpringOpts} [opts]\n * @returns {Spring<T>}\n */\nexport function spring(value, opts = {}) {\n\tconst store = writable(value);\n\tconst { stiffness = 0.15, damping = 0.8, precision = 0.01 } = opts;\n\t/** @type {number} */\n\tlet last_time;\n\t/** @type {Task | null} */\n\tlet task;\n\t/** @type {object} */\n\tlet current_token;\n\n\tlet last_value = /** @type {T} */ (value);\n\tlet target_value = /** @type {T | undefined} */ (value);\n\n\tlet inv_mass = 1;\n\tlet inv_mass_recovery_rate = 0;\n\tlet cancel_task = false;\n\t/**\n\t * @param {T} new_value\n\t * @param {SpringUpdateOpts} opts\n\t * @returns {Promise<void>}\n\t */\n\tfunction set(new_value, opts = {}) {\n\t\ttarget_value = new_value;\n\t\tconst token = (current_token = {});\n\t\tif (value == null || opts.hard || (spring.stiffness >= 1 && spring.damping >= 1)) {\n\t\t\tcancel_task = true; // cancel any running animation\n\t\t\tlast_time = raf.now();\n\t\t\tlast_value = new_value;\n\t\t\tstore.set((value = target_value));\n\t\t\treturn Promise.resolve();\n\t\t} else if (opts.soft) {\n\t\t\tconst rate = opts.soft === true ? 0.5 : +opts.soft;\n\t\t\tinv_mass_recovery_rate = 1 / (rate * 60);\n\t\t\tinv_mass = 0; // infinite mass, unaffected by spring forces\n\t\t}\n\t\tif (!task) {\n\t\t\tlast_time = raf.now();\n\t\t\tcancel_task = false;\n\t\t\ttask = loop((now) => {\n\t\t\t\tif (cancel_task) {\n\t\t\t\t\tcancel_task = false;\n\t\t\t\t\ttask = null;\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t\tinv_mass = Math.min(inv_mass + inv_mass_recovery_rate, 1);\n\t\t\t\t/** @type {TickContext<T>} */\n\t\t\t\tconst ctx = {\n\t\t\t\t\tinv_mass,\n\t\t\t\t\topts: spring,\n\t\t\t\t\tsettled: true,\n\t\t\t\t\tdt: ((now - last_time) * 60) / 1000\n\t\t\t\t};\n\t\t\t\t// @ts-ignore\n\t\t\t\tconst next_value = tick_spring(ctx, last_value, value, target_value);\n\t\t\t\tlast_time = now;\n\t\t\t\tlast_value = /** @type {T} */ (value);\n\t\t\t\tstore.set((value = /** @type {T} */ (next_value)));\n\t\t\t\tif (ctx.settled) {\n\t\t\t\t\ttask = null;\n\t\t\t\t}\n\t\t\t\treturn !ctx.settled;\n\t\t\t});\n\t\t}\n\t\treturn new Promise((fulfil) => {\n\t\t\t/** @type {Task} */ (task).promise.then(() => {\n\t\t\t\tif (token === current_token) fulfil();\n\t\t\t});\n\t\t});\n\t}\n\t/** @type {Spring<T>} */\n\tconst spring = {\n\t\tset,\n\t\tupdate: (fn, opts) => set(fn(/** @type {T} */ (target_value), /** @type {T} */ (value)), opts),\n\t\tsubscribe: store.subscribe,\n\t\tstiffness,\n\t\tdamping,\n\t\tprecision\n\t};\n\treturn spring;\n}\n", "/** @import { Task } from '../internal/client/types' */\n/** @import { Tweened } from './public' */\n/** @import { TweenedOptions } from './private' */\nimport { writable } from '../store/shared/index.js';\nimport { raf } from '../internal/client/timing.js';\nimport { loop } from '../internal/client/loop.js';\nimport { linear } from '../easing/index.js';\nimport { is_date } from './utils.js';\n\n/**\n * @template T\n * @param {T} a\n * @param {T} b\n * @returns {(t: number) => T}\n */\nfunction get_interpolator(a, b) {\n\tif (a === b || a !== a) return () => a;\n\n\tconst type = typeof a;\n\tif (type !== typeof b || Array.isArray(a) !== Array.isArray(b)) {\n\t\tthrow new Error('Cannot interpolate values of different type');\n\t}\n\n\tif (Array.isArray(a)) {\n\t\tconst arr = /** @type {Array<any>} */ (b).map((bi, i) => {\n\t\t\treturn get_interpolator(/** @type {Array<any>} */ (a)[i], bi);\n\t\t});\n\n\t\t// @ts-ignore\n\t\treturn (t) => arr.map((fn) => fn(t));\n\t}\n\n\tif (type === 'object') {\n\t\tif (!a || !b) {\n\t\t\tthrow new Error('Object cannot be null');\n\t\t}\n\n\t\tif (is_date(a) && is_date(b)) {\n\t\t\tconst an = a.getTime();\n\t\t\tconst bn = b.getTime();\n\t\t\tconst delta = bn - an;\n\n\t\t\t// @ts-ignore\n\t\t\treturn (t) => new Date(an + t * delta);\n\t\t}\n\n\t\tconst keys = Object.keys(b);\n\n\t\t/** @type {Record<string, (t: number) => T>} */\n\t\tconst interpolators = {};\n\t\tkeys.forEach((key) => {\n\t\t\t// @ts-ignore\n\t\t\tinterpolators[key] = get_interpolator(a[key], b[key]);\n\t\t});\n\n\t\t// @ts-ignore\n\t\treturn (t) => {\n\t\t\t/** @type {Record<string, any>} */\n\t\t\tconst result = {};\n\t\t\tkeys.forEach((key) => {\n\t\t\t\tresult[key] = interpolators[key](t);\n\t\t\t});\n\t\t\treturn result;\n\t\t};\n\t}\n\n\tif (type === 'number') {\n\t\tconst delta = /** @type {number} */ (b) - /** @type {number} */ (a);\n\t\t// @ts-ignore\n\t\treturn (t) => a + t * delta;\n\t}\n\n\tthrow new Error(`Cannot interpolate ${type} values`);\n}\n\n/**\n * A tweened store in Svelte is a special type of store that provides smooth transitions between state values over time.\n *\n * @template T\n * @param {T} [value]\n * @param {TweenedOptions<T>} [defaults]\n * @returns {Tweened<T>}\n */\nexport function tweened(value, defaults = {}) {\n\tconst store = writable(value);\n\t/** @type {Task} */\n\tlet task;\n\tlet target_value = value;\n\t/**\n\t * @param {T} new_value\n\t * @param {TweenedOptions<T>} [opts]\n\t */\n\tfunction set(new_value, opts) {\n\t\ttarget_value = new_value;\n\n\t\tif (value == null) {\n\t\t\tstore.set((value = new_value));\n\t\t\treturn Promise.resolve();\n\t\t}\n\n\t\t/** @type {Task | null} */\n\t\tlet previous_task = task;\n\n\t\tlet started = false;\n\t\tlet {\n\t\t\tdelay = 0,\n\t\t\tduration = 400,\n\t\t\teasing = linear,\n\t\t\tinterpolate = get_interpolator\n\t\t} = { ...defaults, ...opts };\n\n\t\tif (duration === 0) {\n\t\t\tif (previous_task) {\n\t\t\t\tprevious_task.abort();\n\t\t\t\tprevious_task = null;\n\t\t\t}\n\t\t\tstore.set((value = target_value));\n\t\t\treturn Promise.resolve();\n\t\t}\n\n\t\tconst start = raf.now() + delay;\n\n\t\t/** @type {(t: number) => T} */\n\t\tlet fn;\n\t\ttask = loop((now) => {\n\t\t\tif (now < start) return true;\n\t\t\tif (!started) {\n\t\t\t\tfn = interpolate(/** @type {any} */ (value), new_value);\n\t\t\t\tif (typeof duration === 'function')\n\t\t\t\t\tduration = duration(/** @type {any} */ (value), new_value);\n\t\t\t\tstarted = true;\n\t\t\t}\n\t\t\tif (previous_task) {\n\t\t\t\tprevious_task.abort();\n\t\t\t\tprevious_task = null;\n\t\t\t}\n\t\t\tconst elapsed = now - 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"names": ["spring", "opts"]
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}
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