/
js.go
142 lines (129 loc) · 3.35 KB
/
js.go
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package liveview
var liveViewJS = []byte(
`(() => {
var url = new URL(location.href);
url.protocol = url.protocol.replace('http', 'ws');
url.pathname = '/live-view/socket';
var live_view = new WebSocket(url);
live_view.addEventListener('open', event => {
document.querySelectorAll('[data-live-view]')
.forEach(view => {
live_view.send(JSON.stringify({
subscribe: view.getAttribute('data-live-view'),
}))
});
});
live_view.addEventListener('message', event => {
var data = event.data;
var { id, render, selector, action } = JSON.parse(data);
var view = document.querySelector('[data-live-view="' + id + '"]');
if (typeof(render) == "string") {
morphdom(view.children[0], '<div>' + render + '</div>');
}
if (action) {
var f = new Function(action);
f.call(view.querySelector(selector));
}
});
live_view.addEventListener('close', event => {
// Do we need to do anything here?
});
// The form_params function is borrowed from https://github.com/grych/drab.
// (c) 2016 Tomek "Grych" Gryszkiewicz
function form_params(form) {
var params = {};
function add(key, value) {
if (params[key]) {
params[key].push(value);
} else {
params[key] = [value];
}
}
var inputs = form.querySelectorAll("input, textarea, select");
for (var i = 0; i < inputs.length; i++) {
var input = inputs[i];
var key = input.name || input.id || false;
if (key) {
if (input.type == "radio" || input.type == 'checkbox') {
if (input.checked) {
add(key, input.value);
}
} else if (input.type == "select-multiple") {
for (var j = 0; j < input.options.length; j++) {
var option = input.options[j];
if (option.selected) {
add(key, option.value);
}
}
} else if (input.type == "submit") {
// Ignore it.
} else {
add(key, input.value);
}
}
};
return params;
}
[
'click',
'change',
'input',
'submit',
].forEach(event_type => {
document.addEventListener(event_type, event => {
var target = event.target;
var element = target.closest('[live-' + event_type + ']');
if(element) {
var event_name = element.getAttribute('live-' + event_type);
event.preventDefault();
var channel = element
.closest('[data-live-view]')
.getAttribute('data-live-view')
var send_event = () => {
var data = {
event: event_name,
channel: channel,
};
switch(element.type) {
case "checkbox":
data.value = target.checked + "";
break;
default:
if (typeof(target.value) == "string") {
data.value = target.value;
} else if (element.hasAttribute("live-value")) {
data.value = element.getAttribute("live-value");
}
break;
}
var form;
if (target.tagName == "FORM") {
form = target;
} else if (element.tagName == "FORM") {
form = element;
} else if (target.form) {
form = target.form;
}
if (form) {
data.form_data = form_params(form);
}
live_view.send(JSON.stringify(data));
};
var debounce = element.getAttribute("live-debounce");
if (debounce) {
clearTimeout(element.liveview_timeout);
element.liveview_timeout = setTimeout(
() => {
element.liveview_timeout = null;
send_event();
},
debounce
);
} else {
send_event();
}
}
});
});
})();
`)