{ "version": 3, "sources": ["map_exploded.js"], "sourcesContent": ["/* Interactive explanation of the live MapLibre layer stack. Every texture is\n * captured from the application's renderer; nothing is traced or recoloured. */\n(() => {\n 'use strict';\n if (!window.snowdeskLayerExplainer) return;\n\n const fallbackStrings = {\n title: 'How the map is built',\n loading: 'Loading map layers\u2026',\n close: 'Close layer animation',\n 'view-label': 'Map layer view',\n stacked: 'Stacked',\n exploded: 'Exploded',\n replay: 'Replay build',\n 'map-layers': 'Map layers',\n 'layers-order': 'Layers from top to bottom',\n reset: 'Reset',\n 'data-credits': 'Data credits',\n swisstopo: 'Swisstopo',\n 'winter-basemap': 'Winter basemap',\n bulletins: 'SLF bulletins',\n 'avalanche-danger': 'Avalanche danger',\n major: 'L1 \u00B7 Major',\n minor: 'L2 \u00B7 Minor',\n micro: 'L4 \u00B7 Micro',\n boundaries: 'EAWS boundaries',\n resorts: 'Resorts',\n 'resort-locations': 'Resort locations',\n locations: 'Your locations',\n 'saved-places': 'Saved places',\n 'stacked-status': 'Stacked layer view.',\n 'exploded-status': 'Exploded layer view.',\n 'replay-status': 'Replaying map build.',\n complete: 'Every layer, together in one map.',\n restored: 'All layers restored.',\n adding: 'Adding %(name)s.',\n unavailable: '%(name)s is unavailable. Close and retry after its data loads.',\n timeout: 'Map tiles did not finish loading. Close and retry.',\n 'no-date': 'No bulletin date selected',\n };\n const strings = window.pwaStrings?.read('map-explainer-strings', fallbackStrings)\n || fallbackStrings;\n const interpolate = window.pwaStrings?.interpolate\n || ((value, values) => value.replace(/%\\((\\w+)\\)s/g, (match, key) => values[key] ?? match));\n const escape = window.pwaStrings?.escapeHtml\n || (value => String(value).replace(/[&<>\"']/g, character => ({\n '&': '&', '<': '<', '>': '>', '\"': '"', \"'\": ''',\n })[character]));\n const text = key => escape(strings[key]);\n\n const dialog = document.createElement('dialog');\n dialog.className = 'map-exploded';\n dialog.setAttribute('aria-labelledby', 'exploded-title');\n dialog.innerHTML = `\n
\n

${text('title')}

\n

${text('loading')}

\n \n
\n
\n
\n \n \n
\n \n
\n
\n
\n \n
\n `;\n document.body.appendChild(dialog);\n\n const status = dialog.querySelector('[role=\"status\"]');\n const stage = dialog.querySelector('.exploded-stage');\n const svg = dialog.querySelector('.exploded-stage svg');\n const labels = dialog.querySelector('.exploded-labels');\n const reset = dialog.querySelector('[data-reset]');\n const replay = dialog.querySelector('[data-replay]');\n const viewButtons = Array.from(dialog.querySelectorAll('[data-view]'));\n const ns = 'http://www.w3.org/2000/svg';\n const captureAbort = new AbortController();\n let amount = 0;\n let shown = 0;\n let activeIndex = -1;\n let animation = 0;\n let busy = true;\n let closed = false;\n\n const mapEl = document.getElementById('map');\n const groups = [\n [strings.swisstopo, strings['winter-basemap'], [], null],\n ];\n // SNOW-1073 removed the slope sheet: swisstopo's slope raster is gone,\n // and the slope layer that replaced it is the terrain filter's slope mode,\n // which is off unless the reader switched it on \u2014 not a sheet every build\n // can demonstrate.\n groups.push(\n [strings.bulletins, strings['avalanche-danger'], ['regions-fill', 'bulletin-groupings-line'], 'l3'],\n [strings.major, strings.boundaries, ['major-regions-line', 'major-regions-label'], 'l1'],\n [strings.minor, strings.boundaries, ['sub-regions-line', 'sub-regions-label'], 'l2'],\n [strings.micro, strings.boundaries, ['regions-line', 'regions-label'], null],\n [strings.resorts, strings['resort-locations'], ['resorts-pin', 'resorts-label'], 'resorts'],\n );\n if (mapEl?.dataset.favouritesEligible === 'true') {\n groups.push([strings.locations, strings['saved-places'], ['favourites-pin', 'favourites-label'], 'favourites']);\n }\n\n const textures = [];\n groups.forEach(([name, description], index) => {\n const group = document.createElementNS(ns, 'g');\n const rect = document.createElementNS(ns, 'rect');\n rect.setAttribute('width', '1000');\n rect.setAttribute('height', '720');\n rect.setAttribute('class', 'exploded-sheet');\n const image = document.createElementNS(ns, 'image');\n image.setAttribute('width', '1000');\n image.setAttribute('height', '720');\n image.setAttribute('preserveAspectRatio', 'xMidYMid meet');\n group.append(rect, image);\n svg.appendChild(group);\n\n const row = document.createElement('div');\n row.className = 'exploded-label';\n row.dataset.built = 'false';\n // The basemap is the one rung that cannot be switched off.\n if (index === 0) row.dataset.fixed = 'true';\n const control = document.createElement('label');\n const input = document.createElement('input');\n input.type = 'checkbox';\n input.setAttribute('role', 'switch');\n input.checked = true;\n input.disabled = true;\n input.setAttribute('aria-label', name);\n const copy = document.createElement('span');\n copy.className = 'exploded-label-copy';\n const title = document.createElement('strong');\n title.textContent = name;\n const subtitle = document.createElement('span');\n subtitle.textContent = description;\n copy.append(title, subtitle);\n const off = document.createElement('span');\n off.className = 'exploded-label-off';\n off.textContent = 'OFF';\n off.setAttribute('aria-hidden', 'true');\n control.append(input, copy, off);\n row.appendChild(control);\n // Prepended, so the list always reads top of the ladder down to the\n // basemap \u2014 the order the exploded view draws, and the order the stack\n // really has. It used to be built basemap-first and flipped with\n // `column-reverse` for the exploded view only, so switching views turned\n // the list upside down, and in the stacked view the basemap sat at the\n // top of a ladder it is the bottom of. Reversing the DOM rather than the\n // flex direction also keeps reading and tab order matching what is drawn.\n labels.prepend(row);\n\n const texture = {\n group,\n image,\n row,\n input,\n off,\n name,\n enabled: true,\n fixed: index === 0,\n };\n input.addEventListener('change', () => {\n texture.enabled = input.checked;\n syncRows();\n draw();\n });\n textures.push(texture);\n });\n\n function stopAnimation() {\n cancelAnimationFrame(animation);\n }\n\n function syncRows() {\n textures.forEach((texture, index) => {\n const built = index < shown;\n texture.row.dataset.built = String(built);\n texture.row.dataset.current = String(index === activeIndex);\n texture.row.dataset.off = String(built && !texture.enabled);\n texture.input.checked = texture.enabled;\n texture.input.disabled = busy || !built || texture.fixed;\n texture.off.hidden = !built || texture.enabled;\n });\n reset.hidden = !textures.some(texture => !texture.fixed && !texture.enabled);\n replay.disabled = busy || shown < textures.length;\n viewButtons.forEach(button => { button.disabled = busy || shown < textures.length; });\n }\n\n function draw() {\n const width = stage.clientWidth;\n if (!width) return;\n const narrow = width < 600;\n const available = Math.max(120, width - 2);\n const k = available / 1000;\n const flatScale = available / 1000;\n const layerStep = narrow ? 34 : 60;\n const explodedTop = narrow ? 18 : 24;\n const explodedBaseY = explodedTop + (textures.length - 1) * layerStep;\n const explodedA = .86 * k;\n const explodedB = .035 * k;\n const explodedC = -.14 * k;\n const explodedD = .12 * k;\n const explodedSheetHeight = 1000 * explodedB + 720 * explodedD;\n const explodedHeight = explodedBaseY + explodedSheetHeight + (narrow ? 18 : 26);\n const flatHeight = flatScale * 720 + 2;\n const height = explodedHeight * amount + flatHeight * (1 - amount);\n stage.style.height = `${height}px`;\n svg.setAttribute('viewBox', `0 0 ${width} ${height}`);\n\n textures.forEach((texture, index) => {\n const flat = 1 - amount;\n const a = explodedA * amount + flatScale * flat;\n const b = explodedB * amount;\n const c = explodedC * amount;\n const d = explodedD * amount + flatScale * flat;\n const x = 112 * k * amount + flat;\n const y = (explodedBaseY - index * layerStep) * amount + flat;\n texture.group.setAttribute('transform', `matrix(${a},${b},${c},${d},${x},${y})`);\n texture.group.style.opacity = index < shown && texture.enabled ? 1 : 0;\n });\n syncRows();\n }\n\n function setPressedView(view) {\n dialog.dataset.view = view;\n viewButtons.forEach(button => {\n button.setAttribute('aria-pressed', String(button.dataset.view === view));\n });\n }\n\n function move(target, announce = true) {\n stopAnimation();\n const from = amount;\n const start = performance.now();\n const duration = matchMedia('(prefers-reduced-motion: reduce)').matches ? 0 : 1300;\n function tick(now) {\n const progress = duration ? Math.min(1, (now - start) / duration) : 1;\n const eased = progress * progress * (3 - 2 * progress);\n amount = from + (target - from) * eased;\n draw();\n if (progress < 1) animation = requestAnimationFrame(tick);\n else if (announce) status.textContent = target\n ? strings['exploded-status']\n : strings['stacked-status'];\n }\n animation = requestAnimationFrame(tick);\n }\n\n viewButtons.forEach(button => {\n button.addEventListener('click', () => {\n const view = button.dataset.view;\n setPressedView(view);\n move(view === 'exploded' ? 1 : 0);\n });\n });\n\n function waitForFrame(map, event, read = () => undefined) {\n return new Promise((resolve, reject) => {\n if (captureAbort.signal.aborted) {\n reject(new Error('Capture cancelled'));\n return;\n }\n const cleanup = () => {\n clearTimeout(timer);\n map.off(event, done);\n captureAbort.signal.removeEventListener('abort', cancel);\n };\n const cancel = () => {\n cleanup();\n reject(new Error('Capture cancelled'));\n };\n const done = () => {\n cleanup();\n try { resolve(read()); } catch (error) { reject(error); }\n };\n const timer = setTimeout(() => {\n cleanup();\n reject(new Error(strings.timeout));\n }, 45000);\n captureAbort.signal.addEventListener('abort', cancel, {once: true});\n map.once(event, done);\n map.triggerRepaint();\n });\n }\n\n function waitForDelay(delay) {\n if (delay <= 0) return Promise.resolve();\n return new Promise((resolve, reject) => {\n const done = () => {\n captureAbort.signal.removeEventListener('abort', cancel);\n resolve();\n };\n const cancel = () => {\n clearTimeout(timer);\n reject(new Error('Capture cancelled'));\n };\n const timer = setTimeout(done, delay);\n captureAbort.signal.addEventListener('abort', cancel, {once: true});\n });\n }\n\n function waitForCadence(lastRevealAt) {\n if (!lastRevealAt) return Promise.resolve();\n return waitForDelay(Math.max(0, 1100 - (performance.now() - lastRevealAt)));\n }\n\n async function replayBuild() {\n if (busy || shown < textures.length) return;\n busy = true;\n activeIndex = 0;\n shown = 0;\n setPressedView('stacked');\n move(0, false);\n status.textContent = strings['replay-status'];\n draw();\n let lastRevealAt = performance.now();\n for (let index = 0; index < textures.length; index += 1) {\n activeIndex = index;\n syncRows();\n await waitForCadence(lastRevealAt);\n if (closed) return;\n shown = index + 1;\n lastRevealAt = performance.now();\n draw();\n }\n activeIndex = -1;\n busy = false;\n status.textContent = strings.complete;\n draw();\n }\n\n replay.addEventListener('click', () => {\n replayBuild().catch(error => {\n if (!closed) {\n status.textContent = error.message;\n status.setAttribute('role', 'alert');\n }\n });\n });\n\n reset.addEventListener('click', () => {\n textures.forEach(texture => { texture.enabled = true; });\n status.textContent = strings.restored;\n draw();\n });\n\n const idle = map => waitForFrame(map, 'idle');\n const capture = map => waitForFrame(map, 'render', () => map.getCanvas().toDataURL('image/png'));\n\n async function build() {\n await window.snowdeskMapState.ready;\n const map = window.snowdeskMap;\n const oldCamera = {\n center: map.getCenter(), zoom: map.getZoom(),\n bearing: map.getBearing(), pitch: map.getPitch(),\n };\n const visibility = new Map();\n const filters = new Map();\n // Snapshot every layer the demo is about to override, and do it LAZILY.\n // Reading the style once after ``ready`` misses the tiers the boot-time\n // lazy loads install later \u2014 the bulletin boundary, and an eligible user's\n // default-on favourites \u2014 which `prepare()` brings in mid-build. Those\n // layers would be absent from the snapshot, and the restore below would\n // read them as `none` and leave them hidden for the rest of the session,\n // with `overlayLoaded` already true so no loader reinstates them. Taking\n // each layer's state the first time we see it records what the\n // application configured, before this demo touches it.\n const remember = () => {\n for (const layer of map.getStyle().layers) {\n if (visibility.has(layer.id)) continue;\n visibility.set(layer.id, layer.layout?.visibility || 'visible');\n filters.set(layer.id, layer.filter || null);\n }\n };\n // Show exactly ``ids`` and nothing else, recording what each layer was\n // configured to be first.\n const only = (ids) => {\n remember();\n for (const layer of map.getStyle().layers) {\n map.setLayoutProperty(layer.id, 'visibility', ids.includes(layer.id) ? 'visible' : 'none');\n }\n };\n remember();\n const oldFill = map.getPaintProperty('regions-fill', 'fill-opacity');\n const container = map.getContainer();\n const oldContainerStyle = container.getAttribute('style');\n // SNOW-172: the capture flies to a fixed Swiss view, but the persisted\n // country filters are the user's. A returning visitor who follows only\n // France or ALBINA has Switzerland filtered out, so the region, bulletin,\n // L1, L2 and L4 sheets would all capture blank. Force CH on for the\n // duration and put the preference back afterwards \u2014 localStorage is never\n // written.\n let restoreCountries = () => {};\n try {\n const metadata = await window.snowdeskLayerExplainer.prepare();\n if (closed) return;\n remember();\n restoreCountries = await window.snowdeskLayerExplainer.focusSwitzerland();\n // Install every tier the ladder shows BEFORE photographing anything.\n // The demo is a fixed sequence \u2014 basemap, then each layer on top \u2014 and\n // it must read the same whatever the visitor happens to have switched\n // on, so it cannot wait for the ordinary lazy loads to arrive as their\n // step comes round. That is also a correctness fix: the boot-time\n // ``restoreOverlay`` calls for a visitor's OWN enabled tiers are\n // fire-and-forget, still in flight when ``ready`` resolves, so an L1\n // outline or a resort pin would install a moment after a step had\n // already hidden everything and land in that step's photograph. The\n // Swisstopo sheet came out with region boundaries and resorts drawn on\n // it. Loading is not showing: each tier installs at the visibility its\n // own toggle dictates, and the capture forces what it needs per step.\n for (const [, , , loaderKey] of groups) {\n if (loaderKey) await window.snowdeskLayerExplainer.prepare(loaderKey);\n }\n remember();\n const applicationSources = new Set([\n 'regions', 'major-regions', 'sub-regions', 'bulletin-groupings',\n 'resorts', 'favourites', 'weather', 'routes', 'community-reports',\n 'cached-tiles', 'terrain-filter',\n ]);\n groups[0][2] = map.getStyle().layers\n .filter(layer => !applicationSources.has(layer.source) && !/^(routes|trip|download|cached)-/.test(layer.id))\n .map(layer => layer.id);\n Object.assign(container.style, {\n position: 'fixed', left: '-10000px', top: '0', width: '1000px', height: '720px',\n });\n map.resize();\n map.fitBounds([[5.9, 45.72], [10.6, 47.85]], {padding: 45, duration: 0});\n map.setPaintProperty('regions-fill', 'fill-opacity', metadata.fillOpacity);\n let lastRevealAt = 0;\n for (let index = 0; index < groups.length; index += 1) {\n const [name, , ids] = groups[index];\n if (closed) return;\n activeIndex = index;\n status.textContent = interpolate(strings.adding, {name});\n syncRows();\n if (!ids.some(id => map.getLayer(id))) {\n throw new Error(interpolate(strings.unavailable, {name}));\n }\n only(ids);\n await idle(map);\n // Re-assert immediately before the shutter. The preload above settles\n // the tiers this demo owns, but an overlay it does not \u2014 community\n // reports, weather, routes \u2014 can still land from its own boot restore\n // during the wait, and would otherwise be photographed.\n only(ids);\n const url = await capture(map);\n const decoded = new Image();\n decoded.src = url;\n await decoded.decode();\n textures[index].image.setAttribute('href', url);\n await waitForCadence(lastRevealAt);\n shown = index + 1;\n lastRevealAt = performance.now();\n draw();\n }\n dialog.querySelector('[data-date]').textContent = metadata.date || strings['no-date'];\n activeIndex = -1;\n busy = false;\n status.textContent = strings.complete;\n draw();\n } finally {\n for (const layer of map.getStyle().layers) {\n // A layer this demo never saw is a layer it never hid; leave it alone\n // rather than defaulting it to `none`.\n if (!visibility.has(layer.id)) continue;\n map.setLayoutProperty(layer.id, 'visibility', visibility.get(layer.id));\n if (layer.type !== 'background' && layer.type !== 'raster') {\n map.setFilter(layer.id, filters.get(layer.id));\n }\n }\n // Last, so the recomposed country filters win over the snapshot above.\n restoreCountries();\n map.setPaintProperty('regions-fill', 'fill-opacity', oldFill);\n if (oldContainerStyle === null) container.removeAttribute('style');\n else container.setAttribute('style', oldContainerStyle);\n map.resize();\n map.jumpTo(oldCamera);\n }\n }\n\n const observer = new ResizeObserver(draw);\n\n /*\n * Take ``layers=exploded`` back off the URL when the demo closes.\n *\n * The parameter is what opened the demo, and it is what map.js reads to\n * force the Swiss winter basemap for the capture. Left in place, closing\n * the dialog dismisses the demo for this paint only \u2014 a reload, a\n * back/forward step, or a shared link reopens it and re-forces the\n * basemap over the visitor's own stored choice. Closing is the visitor\n * saying they are done, so the address bar has to agree. replaceState\n * rather than pushState: the demo is not a history entry of its own, and\n * every other parameter (``d``, the date) stays exactly as it was.\n */\n function clearExplainerParam() {\n const url = new URL(window.location.href);\n if (url.searchParams.get('layers') !== 'exploded') return;\n url.searchParams.delete('layers');\n window.history.replaceState(window.history.state, '', url.href);\n }\n\n dialog.addEventListener('close', () => {\n closed = true;\n captureAbort.abort();\n stopAnimation();\n observer.disconnect();\n clearExplainerParam();\n });\n dialog.querySelector('[data-close]').addEventListener('click', () => dialog.close());\n syncRows();\n setPressedView('stacked');\n dialog.showModal();\n draw();\n observer.observe(stage);\n build().catch(error => {\n if (!closed) {\n busy = false;\n activeIndex = -1;\n status.textContent = error.message;\n status.setAttribute('role', 'alert');\n syncRows();\n }\n });\n})();\n"], "mappings": 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