etiquette/frontends/etiquette_flask/static/js/photo_clipboard.js

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const photo_clipboard = {};
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photo_clipboard.clipboard = new Set();
photo_clipboard.on_load_hooks = [];
photo_clipboard.on_save_hooks = [];
// Load save ///////////////////////////////////////////////////////////////////////////////////////
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photo_clipboard.clear_clipboard =
function clear_clipboard()
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{
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photo_clipboard.clipboard.clear();
photo_clipboard.save_clipboard();
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}
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photo_clipboard.load_clipboard =
function load_clipboard(event)
{
console.log("Loading photo clipboard from localstorage.");
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const stored = localStorage.getItem("photo_clipboard");
if (stored === null)
{
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if (photo_clipboard.clipboard.size != 0)
{
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photo_clipboard.clipboard = new Set();
}
}
else
{
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photo_clipboard.clipboard = new Set(JSON.parse(stored));
}
for (const on_load_hook of photo_clipboard.on_load_hooks)
{
on_load_hook();
}
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return photo_clipboard.clipboard;
}
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photo_clipboard.save_clipboard =
function save_clipboard()
{
console.log("Saving photo clipboard to localstorage.");
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const serialized = JSON.stringify(Array.from(photo_clipboard.clipboard));
localStorage.setItem("photo_clipboard", serialized);
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photo_clipboard.update_pagestate();
for (const on_save_hook of photo_clipboard.on_save_hooks)
{
on_save_hook();
}
}
// Card management /////////////////////////////////////////////////////////////////////////////////
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photo_clipboard.apply_check =
function apply_check(checkbox)
{
/*
Check the checkbox if this photo ID is on the clipboard.
There are two valid scenarios:
1. The checkbox is a child of a photo_card div, and that div has data-id
containing the photo id. That div will receive the CSS class
photo_card_selected or photo_card_unselected.
This is the most common usage.
2. The checkbox has its own data-photo-id, and the parent element will be
ignored. This is used only if the checkbox needs to be displayed outside
of a photo card, such as on the /photo/id page where it makes no sense
to put a photo card of the photo you're already looking at.
*/
let photo_id;
let photo_card;
if (checkbox.dataset.photoId)
{
photo_id = checkbox.dataset.photoId;
}
else
{
photo_card = checkbox.parentElement;
photo_id = photo_card.dataset.id;
}
checkbox.checked = photo_clipboard.clipboard.has(photo_id);
if (! photo_card)
{
return;
}
if (checkbox.checked)
{
photo_card.classList.remove("photo_card_unselected");
photo_card.classList.add("photo_card_selected");
}
else
{
photo_card.classList.remove("photo_card_selected");
photo_card.classList.add("photo_card_unselected");
}
}
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photo_clipboard.apply_check_all =
function apply_check_all()
{
/*
Run through all the photo cards on the page and set their checkbox to the
correct value.
*/
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const checkboxes = document.getElementsByClassName("photo_card_selector_checkbox");
for (const checkbox of checkboxes)
{
photo_clipboard.apply_check(checkbox);
}
}
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photo_clipboard.previous_photo_select = null;
photo_clipboard.on_photo_select =
function on_photo_select(event)
{
/*
Select or unselect the clicked photo, with support for Shift-click to action
everything between the previous click and this one inclusively.
Those middle items will be set to the same state as the new state of the
clicked item.
*/
const checkbox = event.target;
let action;
if (checkbox.checked)
{
action = photo_clipboard.clipboard.add.bind(photo_clipboard.clipboard);
}
else
{
action = photo_clipboard.clipboard.delete.bind(photo_clipboard.clipboard);
}
if (! checkbox.parentElement.classList.contains("photo_card"))
{
action(checkbox.dataset.photoId);
}
else if (event.shiftKey && photo_clipboard.previous_photo_select)
{
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const current_photo_div = checkbox.parentElement;
const previous_photo_div = photo_clipboard.previous_photo_select;
const photo_divs = Array.from(current_photo_div.parentElement.getElementsByClassName("photo_card"));
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const current_index = photo_divs.indexOf(current_photo_div);
const previous_index = photo_divs.indexOf(previous_photo_div);
let slice;
if (current_index == previous_index)
{
slice = [current_photo_div];
}
else
{
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const left = Math.min(previous_index, current_index);
const right = Math.max(previous_index, current_index);
slice = photo_divs.slice(left, right + 1);
}
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for (const photo_div of slice)
{
action(photo_div.dataset.id);
}
photo_clipboard.previous_photo_select = current_photo_div;
}
else
{
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const photo_div = checkbox.parentElement;
action(photo_div.dataset.id);
photo_clipboard.previous_photo_select = photo_div;
}
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photo_clipboard.save_clipboard();
}
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photo_clipboard.select_all_photos =
function select_all_photos()
{
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const photo_divs = Array.from(document.getElementsByClassName("photo_card"));
for (const photo_div of photo_divs)
{
photo_clipboard.clipboard.add(photo_div.dataset.id);
}
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photo_clipboard.apply_check_all();
photo_clipboard.save_clipboard();
}
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photo_clipboard.unselect_all_photos =
function unselect_all_photos()
{
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const photo_divs = Array.from(document.getElementsByClassName("photo_card"));
for (const photo_div of photo_divs)
{
photo_clipboard.clipboard.delete(photo_div.dataset.id);
}
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photo_clipboard.apply_check_all()
photo_clipboard.previous_photo_select = null;
photo_clipboard.save_clipboard();
}
// Tray management /////////////////////////////////////////////////////////////////////////////////
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photo_clipboard.clipboard_tray_collapse =
function clipboard_tray_collapse()
{
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const tray_body = document.getElementById("clipboard_tray_body");
tray_body.classList.add("hidden");
}
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photo_clipboard.clipboard_tray_uncollapse =
function clipboard_tray_uncollapse()
{
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const tray_body = document.getElementById("clipboard_tray_body");
tray_body.classList.remove("hidden");
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photo_clipboard.update_clipboard_tray();
}
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photo_clipboard.clipboard_tray_collapse_toggle =
function clipboard_tray_collapse_toggle()
{
/*
Show or hide the clipboard.
*/
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const tray_body = document.getElementById("clipboard_tray_body");
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if (!tray_body)
{
return;
}
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if (tray_body.classList.contains("hidden") && photo_clipboard.clipboard.size > 0)
{
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photo_clipboard.clipboard_tray_uncollapse();
}
else
{
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photo_clipboard.clipboard_tray_collapse();
}
}
photo_clipboard.ingest_toolbox_items =
function ingest_toolbox_items()
{
/*
The page may provide divs with the class "my_clipboard_tray_toolbox", and
we will migrate all the elements into the real clipboard tray toolbox.
*/
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const toolbox = document.getElementById("clipboard_tray_toolbox");
const moreboxes = document.getElementsByClassName("my_clipboard_tray_toolbox");
for (const morebox of moreboxes)
{
while (morebox.firstElementChild)
{
toolbox.appendChild(morebox.firstElementChild);
}
morebox.parentElement.removeChild(morebox);
}
}
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photo_clipboard.on_tray_delete_button =
function on_tray_delete_button(event)
{
/*
Remove the clicked row from the clipboard.
*/
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const clipboard_line = event.target.parentElement;
const photo_id = clipboard_line.dataset.id;
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photo_clipboard.clipboard.delete(photo_id);
photo_clipboard.save_clipboard();
}
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photo_clipboard.update_clipboard_tray =
function update_clipboard_tray()
{
/*
Rebuild the rows if the tray is open.
*/
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const clipboard_tray = document.getElementById("clipboard_tray");
if (clipboard_tray === null)
{
return;
}
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if (photo_clipboard.clipboard.size == 0)
{
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photo_clipboard.clipboard_tray_collapse();
}
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const tray_lines = document.getElementById("clipboard_tray_lines");
if (!clipboard_tray.classList.contains("hidden"))
{
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common.delete_all_children(tray_lines);
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const photo_ids = Array.from(photo_clipboard.clipboard);
photo_ids.sort();
for (const photo_id of photo_ids)
{
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const clipboard_line = document.createElement("div");
clipboard_line.classList.add("clipboard_tray_line");
clipboard_line.dataset.id = photo_id;
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const clipboard_line_delete_button = document.createElement("button");
clipboard_line_delete_button.classList.add("remove_tag_button_perm");
clipboard_line_delete_button.classList.add("red_button");
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clipboard_line_delete_button.onclick = photo_clipboard.on_tray_delete_button;
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const clipboard_line_link = document.createElement("a");
clipboard_line_link.target = "_blank";
clipboard_line_link.href = "/photo/" + photo_id;
clipboard_line_link.innerText = photo_id;
clipboard_line.appendChild(clipboard_line_delete_button);
clipboard_line.appendChild(clipboard_line_link);
tray_lines.appendChild(clipboard_line);
}
}
}
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// Page and event management ///////////////////////////////////////////////////////////////////////
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photo_clipboard.open_full_clipboard_tab =
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function open_full_clipboard_tab()
{
window.open("/clipboard");
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}
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photo_clipboard.update_clipboard_count =
function update_clipboard_count()
{
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const elements = document.getElementsByClassName("clipboard_count");
for (const element of elements)
{
element.innerText = photo_clipboard.clipboard.size;
}
}
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photo_clipboard.on_storage_event =
function on_storage_event()
{
/*
Receive storage events from other tabs and update our state to match.
*/
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photo_clipboard.load_clipboard();
photo_clipboard.update_pagestate();
}
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photo_clipboard.update_pagestate =
function update_pagestate()
{
/*
Update all relevant DOM elements to match internal state.
*/
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photo_clipboard.update_clipboard_count();
photo_clipboard.update_clipboard_tray();
photo_clipboard.apply_check_all();
}
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photo_clipboard.on_pageload =
function on_pageload()
{
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window.addEventListener("storage", photo_clipboard.on_storage_event, false);
hotkeys.register_hotkey("ctrl a", photo_clipboard.select_all_photos, "Select all photos.");
hotkeys.register_hotkey("ctrl d", photo_clipboard.unselect_all_photos, "Deselect all photos.");
hotkeys.register_hotkey("c", photo_clipboard.clipboard_tray_collapse_toggle, "Toggle clipboard tray.");
hotkeys.register_hotkey("shift c", photo_clipboard.open_full_clipboard_tab, "Open full clipboard page.");
photo_clipboard.ingest_toolbox_items();
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photo_clipboard.load_clipboard();
photo_clipboard.update_pagestate();
}
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document.addEventListener("DOMContentLoaded", photo_clipboard.on_pageload);