4 <meta name=
"viewport" content=
"width=device-width, initial-scale=1" />
7 CharmBypass: doing transit equity whether they like it or not
17 /* Set the height to
100% of the screen, which we'll keep; and the
18 * initial position to (
0,
0), which we're going to change
19 * every time the window is resized, because the exact amount
20 * that we have to slide the SVG to the left to get the ticket
21 * into the center will change. */
27 /* Hide everything by default. We only show it once the user has
28 * submitted the menu form */
32 /* The blinking fade in/out animation for the ticket date and time */
45 #tickettime, #ticketdate {
46 /*
300 two-second blinks is ten minutes */
47 animation: blink
2s linear
300;
50 /* Define, load, and specify the custom font we use for the ticket
51 * date, time, and service name. */
53 font-family: "CharmBypass Regular";
55 url("data:font/woff2;base64,@CBPREGULAR@") format("woff2")
58 #servicename, #tickettime, #ticketdate, #codetext {
59 font-family: "CharmBypass Regular", sans-serif;
63 font-family: "CharmBypass Bold";
65 url("data:font/woff2;base64,@CBPBOLD@") format("woff2")
69 font-family: "CharmBypass Bold", sans-serif;
72 /************************/
73 /* Scrolling animations */
74 /************************/
79 transform: translateX(
0%);
82 transform: translateX(-
100%);
87 animation: busroll
23s linear infinite;
94 transform: translateX(
0%);
97 transform: translateX(
100%);
102 animation: tramroll
17s linear infinite;
107 @keyframes trainroll {
109 transform: translateX(
0%);
112 transform: translateX(
100%);
117 animation: trainroll
11s linear infinite;
122 @keyframes cloudsfloat {
124 transform: translateX(
0%);
127 transform: translateX(-
50%);
132 animation: cloudsfloat
40s linear infinite;
135 @keyframes cloudscopyfloat {
137 transform: translateX(
0%);
140 transform: translateX(-
50%);
145 animation: cloudscopyfloat
40s linear infinite;
150 @keyframes treespass {
152 transform: translateX(
0%);
155 transform: translateX(-
50%);
160 /* The trees move a little faster than the clouds */
161 animation: treespass
30s linear infinite;
164 @keyframes treescopypass {
166 transform: translateX(
0%);
169 transform: translateX(-
50%);
174 /* The trees move a little faster than the clouds */
175 animation: treescopypass
30s linear infinite;
180 @keyframes cityscroll {
182 transform: translateX(
0%);
185 transform: translateX(-
50%);
190 /* The city moves faster than the clouds but slower
192 animation: cityscroll
35s linear infinite;
195 @keyframes citycopyscroll {
197 transform: translateX(
0%);
200 transform: translateX(-
50%);
205 /* The city moves faster than the clouds but slower
207 animation: citycopyscroll
35s linear infinite;
215 <h2>doing transit equity whether they like it or not
</h2>
218 <em>Hint:
</em> If you think the driver or fare inspector will
219 actually check it, the daily security code is the same on a
220 $
2.00 BaltimoreLink ticket as it is on a $
9.00 MARC Train
221 ticket. It's also the same on your friend's phone, or for
222 anyone else in Maryland that day.
227 <legend>BaltimoreLink (Bus, Light Rail, Metro)
</legend>
230 Daily security code (optional):
237 pattern=
"[a-zA-Z0-9]*" />
239 <input type=
"hidden" name=
"servicename" value=
"BaltimoreLink" />
240 <input type=
"submit" name=
"go" value=
"Get Ticket" />
245 <legend>Commuter Bus
</legend>
246 <input type=
"hidden" name=
"serviceid" value=
"R" />
247 <input type=
"hidden" name=
"servicename" value=
"Commuter Bus" />
251 Daily security code (optional):
258 pattern=
"[a-zA-Z0-9]*" />
263 <input required
type=
"radio" id=
"zone1" name=
"zone" value=
"Zone 1" />
264 <label for=
"zone1">Zone
1</label>
267 <input required
type=
"radio" id=
"zone2" name=
"zone" value=
"Zone 2" />
268 <label for=
"zone2">Zone
2</label>
271 <input required
type=
"radio" id=
"zone3" name=
"zone" value=
"Zone 3" />
272 <label for=
"zone3">Zone
3</label>
275 <input required
type=
"radio" id=
"zone4" name=
"zone" value=
"Zone 4" />
276 <label for=
"zone4">Zone
4</label>
279 <input required
type=
"radio" id=
"zone5" name=
"zone" value=
"Zone 5" />
280 <label for=
"zone5">Zone
5</label>
283 <input type=
"submit" name=
"go" value=
"Get Ticket" />
288 <legend>MARC Train
</legend>
292 Daily security code (optional):
299 pattern=
"[a-zA-Z0-9]*" />
305 <input required
type=
"radio" id=
"origin1" name=
"origin" value=
"BAL" />
306 <label for=
"origin1">Baltimore/Penn (Penn Line)
</label>
309 <input required
type=
"radio" id=
"origin2" name=
"origin" value=
"BCA" />
310 <label for=
"origin2">Baltimore/Camden (Camden Line)
</label>
313 <input required
type=
"radio" id=
"origin3" name=
"origin" value=
"BWE" />
314 <label for=
"origin3">Bowie State (Penn Line)
</label>
317 <input required
type=
"radio" id=
"origin4" name=
"origin" value=
"BWI" />
318 <label for=
"origin4">BWI Airport (Penn Line)
</label>
321 <input required
type=
"radio" id=
"origin5" name=
"origin" value=
"CPK" />
322 <label for=
"origin5">College Park (Camden Line)
</label>
325 <input required
type=
"radio" id=
"origin6" name=
"origin" value=
"SEB" />
326 <label for=
"origin6">Seabrook (Penn Line)
</label>
329 <input required
type=
"radio" id=
"origin7" name=
"origin" value=
"WAS" />
330 <label for=
"origin7">Washington D.C.
</label>
333 <input required
type=
"radio" id=
"origin8" name=
"origin" value=
"WBL" />
334 <label for=
"origin8">West Baltimore (Penn Line)
</label>
339 <input required
type=
"radio" id=
"destination1" name=
"destination" value=
"BAL" />
340 <label for=
"destination1">Baltimore/Penn (Penn Line)
</label>
343 <input required
type=
"radio" id=
"destination2" name=
"destination" value=
"BCA" />
344 <label for=
"destination2">Baltimore/Camden (Camden Line)
</label>
347 <input required
type=
"radio" id=
"destination3" name=
"destination" value=
"BWE" />
348 <label for=
"destination3">Bowie State (Penn Line)
</label>
351 <input required
type=
"radio" id=
"destination4" name=
"destination" value=
"BWI" />
352 <label for=
"destination4">BWI Airport (Penn Line)
</label>
355 <input required
type=
"radio" id=
"destination5" name=
"destination" value=
"CPK" />
356 <label for=
"destination5">College Park (Camden Line)
</label>
359 <input required
type=
"radio" id=
"destination6" name=
"destination" value=
"SEB" />
360 <label for=
"destination6">Seabrook (Penn Line)
</label>
363 <input required
type=
"radio" id=
"destination7" name=
"destination" value=
"WAS" />
364 <label for=
"destination7">Washington D.C.
</label>
367 <input required
type=
"radio" id=
"destination8" name=
"destination" value=
"WBL" />
368 <label for=
"destination8">West Baltimore (Penn Line)
</label>
371 <input type=
"hidden" name=
"serviceid" value=
"R" />
372 <input type=
"hidden" name=
"servicename" value=
"MARC Train" />
373 <input type=
"submit" name=
"go" value=
"Get Ticket" />
382 /***********************************************/
383 /* First, center the ticket within the browser */
384 /***********************************************/
386 function center_ticket() {
387 /* We're relying on the SVG being the full height of the
388 * viewport already, and on the aspect ratio being
389 * preserved. First, find the center of the ticket. */
390 const r = document.getElementById("ticket").getBoundingClientRect();
391 const c = r.left + (r.width /
2);
393 /* That's the center-line of the ticket. We want to move it to
394 * the center-line of the viewport. */
395 const vc = document.documentElement.clientWidth /
2;
397 /* This is how much we need to translate the SVG */
398 const hdelta = vc - c;
400 /* But before we can set the absolute left-coordinate of the
401 * SVG, we need to know where it is now. Note: without the
402 * "px" this doesn't default to pixels like CSS does. */
403 const svg = document.querySelector("svg");
404 svg.style.left = (svg.getBoundingClientRect().left + hdelta) + "px";
408 /******************************/
409 /* Set the service identifier */
410 /******************************/
411 function set_service_id() {
412 const sid = document.getElementById("serviceid");
414 /* Get the "serviceid" from the querystring if it's there */
415 const params = new URLSearchParams(document.location.search);
416 if (params.get("serviceid")) {
417 sid.textContent = params.get("serviceid");
420 /* Otherwise, leave it at "F" */
423 /******************************/
424 /* Set the service name */
425 /******************************/
426 function set_service_name() {
427 const sid = document.getElementById("servicename");
429 /* Get the "servicename" from the querystring if it's there */
430 const params = new URLSearchParams(document.location.search);
431 if (params.get("servicename")) {
432 sid.textContent = params.get("servicename");
435 /* Otherwise, leave it at "BaltimoreLink" */
438 /***********************************************************/
439 /* Resize the ticket background based on the service name */
440 /***********************************************************/
442 function resize_ticket() {
443 /* Get the "servicename" from the querystring if it's there */
444 const params = new URLSearchParams(document.location.search);
445 if (params.get("servicename") == "Commuter Bus") {
446 const tbg = document.getElementById("ticketbg");
447 const t = document.getElementById("ticket");
448 const sn = document.getElementById("servicename");
450 /* The top of the background is initially at y=
246.859, and
451 * we scale it by a factor of
1.12 to y=
276.482 for a change
452 * of
29.623. So after we scale it, we translate it upwards
453 * by that amount to put it back where it started. */
454 tbg.setAttribute("transform", "translate(
0 -
29.623) scale(
1 1.12)");
456 /* Now translate the entire ticket up by the magic amount,
1/
5
457 * of the size change we made to the background. */
458 t.setAttribute("transform", "translate(
0 -
9.33)");
460 /* More magic numbers discovered by comparing the two
461 * tickets overlayed in inkscape */
462 sn.setAttribute("transform", "translate(
0 64.28)");
464 else if (params.get("servicename") == "MARC Train") {
468 /* Otherwise, leave it alone. The SVG was designed with the
469 * BaltimoreLink ticket in mind */
472 /****************************************/
473 /* Set and reposition the security code */
474 /****************************************/
476 function set_code() {
477 const ct = document.getElementById("codetext");
479 /* Get the "code" from the querystring if it's there */
480 const params = new URLSearchParams(document.location.search);
481 if (params.get("code")) {
482 ct.textContent = params.get("code").toUpperCase();
485 /* Otherwise, use a random code */
486 const bucket = ["
0","
1","
2","
3","
4","
5","
6","
7","
8","
9",
487 "A","B","C","D","E","F","G","H","I","J",
488 "K","L","M","N","O","P","Q","R","S","T",
489 "U","V","W","X","Y","Z"];
491 /* Two random ints between
0 and
35 */
492 const i1 = Math.floor(Math.random() *
36);
493 const i2 = Math.floor(Math.random() *
36);
494 const d1 = bucket[i1];
495 const d2 = bucket[i2];
496 ct.textContent = d1 + d2;
501 function center_code() {
502 /* Center the security code inside its red box */
503 const ct = document.getElementById("codetext");
504 const bg = document.getElementById("codebg");
506 /* First, find the center of the red box */
507 const r1 = bg.getBoundingClientRect();
508 const c1 = r1.left + (r1.width /
2);
510 /* Now the center of the code text */
511 const r2 = ct.getBoundingClientRect();
512 const c2 = r2.left + (r2.width /
2);
514 /* What do we add to c2 to make it equal to c1? */
515 const hdelta = c1 - c2;
517 /* We've measured everything so far in "client rect"
518 * coordinates, because that's the only available measurement
519 * we have for the width of the
<text> element after futzing
520 * with its contents. But when we reposition that
<text>
521 * element, it will be by adjusting its "x" attribute, and
522 * that attribute uses a different coordinate system than the
523 * client rect does. Specifically, "x" refers to an offset
524 * within the SVG's coordinate system, and the client rect
525 * coordinates are pixels on-screen. To convert between the
526 * two, we can take the "width" attribute of the background
527 * element and compare it to the width of the background
528 * element's client rect. Since the size of the background is
529 * fixed, this should give us a multiplier that turns client recr
530 * distances (what we have) into SVG distances (what we want) */
531 const client_to_svg = parseFloat(bg.getAttribute("width"))/r1.width;
533 /* Convert hdelta from client rect to SVG coordinates */
534 const svg_hdelta = hdelta * client_to_svg;
536 /* Since this
<text> element has an "x" attribute it's easier for
537 * us to shift that than it is to mess with the "left" style. */
538 ct.setAttribute("x", parseFloat(ct.getAttribute("x")) + svg_hdelta);
541 /*****************************************/
542 /* Next, set up the ticket date and time */
543 /*****************************************/
545 function set_ticket_expiry() {
546 /* There are two parameters, time and date, that we store in one
547 * underlying "date" variable. Default both to an hour and a
548 * half from now. This is what the CharmPass app does for
549 * one-way tickets. */
550 const date = new Date();
552 /* BaltimoreLink and MARC Train are valid for an hour and a half */
554 const params = new URLSearchParams(document.location.search);
555 if (params.get("servicename") == "Commuter Bus") {
556 /* But commuter bus tickets are only valid for ten minutes */
560 /* We use the low-level get/setTime to change the number of
561 * milliseconds since the epoch that this date represents
562 * Obviously correct, and avoids all suspicious corner cases
563 * for a few more decades. */
564 date.setTime(date.getTime() + (minutes*
60*
1000));
566 tt = document.getElementById("tickettime");
567 tt.textContent = date.toLocaleTimeString();
569 const td = document.getElementById("ticketdate");
575 td.textContent = date.toLocaleDateString("en-US", dateopts);
579 /*********************************************************/
580 /* Finally, the onclick handler for the night/day switch */
581 /*********************************************************/
583 /* We always start in "day" mode */
587 sky.style.fill = "#efb02f";
590 function set_night() {
591 sky.style.fill = "#
143b66";
594 function swap_colors() {
606 /*******************************************************/
607 /* Compute the MARC "zone" from its origin/destination */
608 /*******************************************************/
610 /* Sorted on the first component, then the second */
624 /* Compute the zone (string) for the given origin/destination pair.
625 * If we don't know it or if you chose in invalid pair (destination
626 * not on the same line as your origin?) then the empty string is
628 function compute_marc_zone(src, dest) {
629 /* Forward direction key for zone_map */
630 const fwd = src + "_" + dest;
632 /* Reverse direction key for zone_map. The zone_map only
633 * has them listed in one direction, so we check both
634 * directions here. */
635 const rev = dest + "_" + src;
637 /* The default. Obviously wrong for when we don't
638 * have the necessary data. */
642 zone = zone_map[fwd];
644 else if (zone_map[rev]) {
645 zone = zone_map[rev];
648 /* Convert the number to a string */
663 function set_marc_zone() {
664 const params = new URLSearchParams(document.location.search);
665 if (params.get("origin") && params.get("destination")) {
666 const src = params.get("origin");
667 const dest = params.get("destination");
668 const zone = compute_marc_zone(src, dest);
670 /* TODO: actually set the zone */
675 /******************************************/
676 /* Display the ticket (and hide the menu) */
677 /******************************************/
680 /* To create our "window" onto the scene, we're going to slide the
681 * SVG off the left-hand side of the screen, and we don't want
682 * scroll bars to appear. */
683 document.body.style.overflow = "hidden";
684 document.body.style.margin = "
0";
685 document.body.style.padding = "
0";
687 const svg = document.querySelector("svg");
688 const menu = document.getElementById("menu");
689 svg.style.display = "initial";
690 menu.style.display = "none";
693 /*****************************************************/
694 /* Add event handlers for all of the functions above */
695 /*****************************************************/
697 const params = new URLSearchParams(document.location.search);
698 if (params.get("go")) {
699 /* First unhide the SVG (swap it with the form) */
700 window.addEventListener("load", go);
702 /* Center the ticket once when the page has loaded */
703 window.addEventListener("load", center_ticket);
705 /* Re-center the ticket when the window is resized */
706 window.addEventListener("resize", center_ticket);
708 /* Set the service identifier when the page has loaded */
709 window.addEventListener("load", set_service_id);
711 /* Set the service name when the page has loaded */
712 window.addEventListener("load", set_service_name);
714 /* Resize the ticket background if necessary */
715 window.addEventListener("load", resize_ticket);
717 /* Set the security code text when the page has loaded */
718 window.addEventListener("load", set_code);
720 /* Center the security code text when the page has loaded; in
721 * particular, after we set the code. */
722 window.addEventListener("load", center_code);
724 /* Set the ticket expiration date/time upon page load */
725 window.addEventListener("load", set_ticket_expiry);
727 /* Set the MARC Train zone, if applicable */
728 window.addEventListener("load", set_marc_zone);
730 /* Swap colors when the screen is tapped */
731 document.body.addEventListener("click", swap_colors);