etiquette/frontends/etiquette_flask/static/common.js

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var PARAGRAPH_TYPES = new Set(["P", "PRE"]);
function Editor(elements, on_open, on_save, on_cancel)
{
/*
This class wraps around display elements like headers and paragraphs, and
creates inputs / textareas to edit them with.
The placeholder text for the edit elements comes from the
data-editor-placeholder attribute of the display elements if available.
The on_open, on_save and on_cancel callbacks will receive two arguments:
1. This editor object.
2. the edit elements as either:
If the display elements ALL have data-editor-id attributes,
then a dictionary of {data-editor-id: edit_element, ...}.
Otherwise, an array of [edit_element, ...] in their original order.
When your callbacks are used, the default `open`, `save`, `cancel`
methods are not called automatically. You should call them from within
your function.
*/
this.cancel = function()
{
this.close();
};
this.close = function()
{
for (var index = 0; index < this.display_elements.length; index += 1)
{
this.display_elements[index].classList.remove("hidden");
this.edit_elements[index].classList.add("hidden");
}
this.open_button.classList.remove("hidden")
this.save_button.classList.add("hidden");
this.cancel_button.classList.add("hidden");
};
this.hide_spinner = function()
{
this.spinner.classList.add("hidden");
};
this.open = function()
{
for (var index = 0; index < this.display_elements.length; index += 1)
{
var display_element = this.display_elements[index];
var edit_element = this.edit_elements[index];
display_element.classList.add("hidden");
edit_element.classList.remove("hidden");
var empty_text = display_element.dataset.editorEmptyText;
if (empty_text !== undefined && display_element.innerText == empty_text)
{
edit_element.value = "";
}
else
{
edit_element.value = display_element.innerText;
}
}
this.open_button.classList.add("hidden")
this.save_button.classList.remove("hidden");
this.cancel_button.classList.remove("hidden");
};
this.save = function()
{
for (var index = 0; index < this.display_elements.length; index += 1)
{
var display_element = this.display_elements[index];
var edit_element = this.edit_elements[index];
if (display_element.dataset.editorEmptyText !== undefined && edit_element.value == "")
{
display_element.innerText = display_element.dataset.editorEmptyText;
}
else
{
display_element.innerText = edit_element.value;
}
}
this.close();
};
this.show_spinner = function()
{
this.spinner.classList.remove("hidden");
};
this.display_elements = [];
this.edit_elements = [];
this.can_use_element_map = true;
this.display_element_map = {};
this.edit_element_map = {};
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this.misc_data = {};
for (var index = 0; index < elements.length; index += 1)
{
var display_element = elements[index];
var edit_element;
if (PARAGRAPH_TYPES.has(display_element.tagName))
{
edit_element = document.createElement("textarea");
edit_element.rows = 6;
}
else
{
edit_element = document.createElement("input");
edit_element.type = "text";
}
edit_element.classList.add("editor_input");
edit_element.classList.add("hidden");
if (display_element.dataset.editorPlaceholder !== undefined)
{
edit_element.placeholder = display_element.dataset.editorPlaceholder;
}
if (this.can_use_element_map)
{
if (display_element.dataset.editorId !== undefined)
{
this.display_element_map[display_element.dataset.editorId] = display_element;
this.edit_element_map[display_element.dataset.editorId] = edit_element;
}
else
{
this.can_use_element_map = false;
this.edit_element_map = null;
this.display_element_map = null;
}
}
display_element.parentElement.insertBefore(edit_element, display_element.nextSibling);
this.display_elements.push(display_element);
this.edit_elements.push(edit_element);
}
var self = this;
var binder = function(func, fallback)
{
if (func == undefined)
{
return fallback;
}
var bound = function()
{
if (this.can_use_element_map)
{
func(self, self.edit_element_map, self.display_element_map);
}
else
{
func(self, self.edit_elements, self.display_elements);
}
}
return bound;
}
this.bound_open = binder(on_open, this.open);
this.bound_save = binder(on_save, this.save);
this.bound_cancel = binder(on_cancel, this.cancel);
var last_element = this.edit_elements[this.edit_elements.length - 1];
var toolbox = document.createElement("div");
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toolbox.classList.add("editor_toolbox");
last_element.parentElement.insertBefore(toolbox, last_element.nextSibling);
this.open_button = document.createElement("button");
this.open_button.innerText = "Edit";
this.open_button.classList.add("editor_button");
this.open_button.classList.add("editor_open_button");
this.open_button.classList.add("green_button");
this.open_button.onclick = this.bound_open.bind(this);
toolbox.appendChild(this.open_button);
this.save_button = document.createElement("button");
this.save_button.innerText = "Save";
this.save_button.classList.add("editor_button");
this.save_button.classList.add("editor_save_button");
this.save_button.classList.add("green_button");
this.save_button.classList.add("hidden");
this.save_button.onclick = this.bound_save.bind(this);
toolbox.appendChild(this.save_button);
this.cancel_button = document.createElement("button");
this.cancel_button.innerText = "Cancel";
this.cancel_button.classList.add("editor_button");
this.cancel_button.classList.add("editor_cancel_button");
this.cancel_button.classList.add("red_button");
this.cancel_button.classList.add("hidden");
this.cancel_button.onclick = this.bound_cancel.bind(this);
toolbox.appendChild(this.cancel_button);
this.spinner = document.createElement("span");
this.spinner.innerText = "Submitting...";
this.spinner.classList.add("editor_spinner");
this.spinner.classList.add("hidden");
toolbox.appendChild(this.spinner);
for (var index = 0; index < this.edit_elements.length; index += 1)
{
var edit_element = this.edit_elements[index];
if (edit_element.tagName == "TEXTAREA")
{
bind_box_to_button(edit_element, this.save_button, true);
}
else
{
bind_box_to_button(edit_element, this.save_button, false);
}
}
}
function create_message_bubble(message_area, message_positivity, message_text, lifespan)
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{
if (lifespan === undefined)
{
lifespan = 8000;
}
var message = document.createElement("div");
message.className = "message_bubble " + message_positivity;
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var span = document.createElement("span");
span.innerHTML = message_text;
message.appendChild(span);
message_area.appendChild(message);
setTimeout(function(){message_area.removeChild(message);}, lifespan);
}
function _request(method, url, callback)
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{
var request = new XMLHttpRequest();
request.onreadystatechange = function()
{
if (request.readyState == 4)
{
if (callback != null)
{
var text = request.responseText;
var response = {
"data": JSON.parse(text),
"meta": {}
};
response["meta"]["request_url"] = url;
response["meta"]["status"] = request.status;
callback(response);
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}
}
};
var asynchronous = true;
request.open(method, url, asynchronous);
return request;
}
function get(url, callback)
{
request = _request("GET", url, callback);
request.send();
}
function post(url, data, callback)
{
request = _request("POST", url, callback);
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request.send(data);
}
function create_album_and_follow(parent)
{
var url = "/albums/create_album";
var data = new FormData();
if (parent !== undefined)
{
data.append("parent", parent);
}
function receive_callback(response)
{
if (response["meta"]["status"] == 200 && response["data"]["id"])
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{
window.location.href = "/album/" + response["data"]["id"];
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}
else
{
console.log(response);
}
}
post(url, data, receive_callback);
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}
function delete_all_children(element)
{
while (element.firstChild)
{
element.removeChild(element.firstChild);
}
}
function bind_box_to_button(box, button, ctrl_enter)
{
// Thanks Yaroslav Yakovlev
// http://stackoverflow.com/a/9343095
var bound_box_hook = function(event)
{
if (event.key !== "Enter")
{return;}
ctrl_success = !ctrl_enter || (event.ctrlKey)
if (! ctrl_success)
{return;}
button.click();
}
box.addEventListener("keyup", bound_box_hook);
}
function entry_with_history_hook(event)
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{
//console.log(event);
var box = event.target;
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if (box.entry_history === undefined)
{box.entry_history = [];}
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if (box.entry_history_pos === undefined)
{box.entry_history_pos = -1;}
if (event.key === "Enter")
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{
box.entry_history.push(box.value);
}
else if (event.key === "ArrowUp")
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{
if (box.entry_history.length == 0)
{return}
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if (box.entry_history_pos == -1)
{box.entry_history_pos = box.entry_history.length - 1;}
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else if (box.entry_history_pos > 0)
{box.entry_history_pos -= 1;}
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box.value = box.entry_history[box.entry_history_pos];
setTimeout(function(){box.selectionStart = box.value.length;}, 0);
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}
else if (event.key === "Escape")
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{
box.value = "";
}
else
{
box.entry_history_pos = -1;
}
}
function html_to_element(html)
{
var template = document.createElement("template");
template.innerHTML = html;
return template.content.firstChild;
}