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/* Compute the total duration of the run. */
function compute()
{
const fps = parseInt(document.getElementById("framerate").value);
const s_time = document.getElementById("startobj").value;
const e_time = document.getElementById("endobj").value;
/* Return early if not all fields are filled */
if (s_time === undefined || e_time === undefined || fps === undefined)
return;
/* Return early on a negative time */
const frames = (e_time - s_time) * fps;
if (frames < 0) {
document.getElementById("time").value = "Error: Negative time";
return;
}
const seconds = Math.round(frames / fps * 1000) / 1000;
/* Show the time and mod message in the DOM. */
const s_frame = ~~(s_time * fps);
const e_frame = ~~(e_time * fps);
const time = time_format(seconds);
document.getElementById("time").value = time;
document.getElementById("mod_message").disabled = false;
document.getElementById("mod_message").innerText = generate_mod_message(
fps, s_time, e_time, time, s_frame, e_frame, frames, seconds);
document.getElementById("mod_message_button").disabled = false;
}
/* Helper function for custom mod messages */
function interpolate(template, variables)
{
return template.replace(/\${[^{]+}/g, (match) => {
const path = match.slice(2, -1).trim();
return variables[path];
});
}
/* Support custom mod messages. Find a better way to do this, it is very cringe! */
function generate_mod_message(
fps, start_time, end_time, total_time, start_frame, end_frame, total_frames, total_seconds)
{
let mod_message = localStorage.getItem("custom_mod_message");
/* TODO: Make this lazy instead of strict? */
const hours = ~~(total_seconds / 3600)
const minutes = ~~((total_seconds % 3600) / 60);
const seconds = ~~(total_seconds % 60);
const milliseconds = total_seconds % 60 % 1;
const padded_minutes = (minutes < 10) ? "0" + minutes : minutes;
const padded_seconds = (seconds < 10) ? "0" + seconds : seconds;
const one_prec_millis = milliseconds.toFixed(1).replace("0.", "");
const two_prec_millis = milliseconds.toFixed(2).replace("0.", "");
const three_prec_millis = milliseconds.toFixed(3).replace("0.", "");
const params = {
H: hours,
M: minutes,
S: seconds,
MS: milliseconds,
PM: padded_minutes,
PS: padded_seconds,
"1MS": one_prec_millis,
"2MS": two_prec_millis,
"3MS": three_prec_millis,
ST: start_time,
ET: end_time,
TT: total_time,
SF: start_frame,
EF: end_frame,
TF: total_frames,
FPS: fps
};
mod_message = interpolate(mod_message, params);
return mod_message;
}
/* Convert seconds to human readable time. */
function time_format(t)
{
const h = ~~(t / 3600);
const m = ~~((t % 3600) / 60);
const s = t % 60;
let ret = "";
if (h > 0)
ret += h + ":" + (m < 10 ? "0" : "");
ret += m + ":" + (s < 10 ? "0" : "") + s.toFixed(3);
return ret;
}
/* Allow user to copy mod message to clipboard. */
function copy_mod_message()
{
const mod_message = document.getElementById("mod_message");
mod_message.focus();
mod_message.select();
document.execCommand("copy");
}
/* If framerate is invalid, show an error message and disable start and end frame fields. */
function check_fps(event)
{
fps = event.target.value;
if (fps > 0 && fps % 1 == 0) {
document.getElementById("startobj").disabled = false;
document.getElementById("endobj").disabled = false;
}
else {
document.getElementById("framerate")
.setCustomValidity("Please enter a valid framerate.");
document.getElementById("framerate").reportValidity();
document.getElementById("startobj").disabled = true;
document.getElementById("endobj").disabled = true;
}
}
/* Get current frame from input field (either start time or end time). */
function parse_time(event)
{
/* Return early if invalid JSON is passed (numbers are valid) */
let input, dinfo;
try {
dinfo = JSON.parse(event.target.value);
} catch {
document.getElementById(event.target.id).value = "";
return;
}
/* If cmt isn't available fallback to lct, also allow raw numbers */
if (!(input = dinfo.cmt) && !(input = dinfo.lct) && typeof ((input = dinfo)) !== "number") {
document.getElementById(event.target.id).value = "";
return;
}
/* Calculate the exact timestamp */
const fps = parseInt(document.getElementById("framerate").value);
const frame = ~~(input * fps) / fps;
document.getElementById(event.target.id).value = `${frame}`;
/* If all fields are filled the compute */
if (document.getElementById("startobj").value && document.getElementById("endobj").value)
compute();
}
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