stylus/manage/incremental-search.js

133 lines
3.7 KiB
JavaScript

/* global installed */
'use strict';
onDOMready().then(() => {
let prevText, focusedLink, focusedEntry;
let prevTime = performance.now();
let focusedName = '';
const input = $element({
tag: 'textarea',
spellcheck: false,
oninput: incrementalSearch,
});
replaceInlineStyle({
position: 'absolute',
color: 'transparent',
border: '1px solid hsla(180, 100%, 100%, .5)',
top: '-1000px',
overflow: 'hidden',
resize: 'none',
'background-color': 'hsla(180, 100%, 100%, .2)',
'pointer-events': 'none',
});
document.body.appendChild(input);
window.addEventListener('keydown', maybeRefocus, true);
function incrementalSearch({which}, immediately) {
if (!immediately) {
debounce(incrementalSearch, 100, {}, true);
return;
}
const direction = which === 38 ? -1 : which === 40 ? 1 : 0;
const text = input.value.toLocaleLowerCase();
if (!text.trim() || !direction && (text === prevText || focusedName.startsWith(text))) {
prevText = text;
return;
}
let textAtPos = 1e6;
let rotated;
const entries = [...installed.children];
const focusedIndex = entries.indexOf(focusedEntry);
if (focusedIndex > 0) {
if (direction > 0) {
rotated = entries.slice(focusedIndex + 1).concat(entries.slice(0, focusedIndex + 1));
} else if (direction < 0) {
rotated = entries.slice(0, focusedIndex).reverse().concat(entries.slice(focusedIndex).reverse());
}
}
let found;
for (const entry of rotated || entries) {
const name = entry.styleNameLowerCase;
const pos = name.indexOf(text);
if (pos === 0) {
found = entry;
break;
} else if (pos > 0 && (pos < textAtPos || direction)) {
found = entry;
textAtPos = pos;
if (direction) {
break;
}
}
}
if (found && found !== focusedEntry) {
focusedEntry = found;
focusedLink = $('.style-name-link', found);
focusedName = found.styleNameLowerCase;
scrollElementIntoView(found);
animateElement(found, {className: 'highlight-quick'});
resizeTo(focusedLink);
return true;
}
}
function maybeRefocus(event) {
if (event.altKey || event.ctrlKey || event.metaKey ||
event.target.matches('[type="text"], [type="search"]')) {
return;
}
const k = event.which;
// focus search field on "/" key
if (k === 191 && !event.shiftKey) {
event.preventDefault();
$('#search').focus();
return;
}
const time = performance.now();
if (
// 0-9
k >= 48 && k <= 57 ||
// a-z
k >= 65 && k <= 90 ||
// numpad keys
k >= 96 && k <= 111 ||
// marks
k >= 186
) {
input.focus();
if (time - prevTime > 1000) {
input.value = '';
}
prevTime = time;
} else
if (k === 13 && focusedLink) {
focusedLink.dispatchEvent(new MouseEvent('click', {bubbles: true}));
} else
if ((k === 38 || k === 40) && !event.shiftKey &&
time - prevTime < 5000 && incrementalSearch(event, true)) {
prevTime = time;
} else
if (event.target === input) {
(focusedLink || document.body).focus();
input.value = '';
}
}
function resizeTo(el) {
const bounds = el.getBoundingClientRect();
const base = document.scrollingElement;
replaceInlineStyle({
left: bounds.left - 2 + base.scrollLeft + 'px',
top: bounds.top - 1 + base.scrollTop + 'px',
width: bounds.width + 4 + 'px',
height: bounds.height + 2 + 'px',
});
}
function replaceInlineStyle(css) {
for (const prop in css) {
input.style.setProperty(prop, css[prop], 'important');
}
}
});