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// Stable Diffusion WebUI - Bracket Checker
// By @Bwin4L, @akx, @w-e-w, @Haoming02
// Counts open and closed brackets (round, square, curly) in the prompt and negative prompt text boxes in the txt2img and img2img tabs.
// If there's a mismatch, the keyword counter turns red, and if you hover on it, a tooltip tells you what's wrong.
function checkBrackets(textArea, counterElem) {
const pairs = [
['(', ')', 'round brackets'],
['[', ']', 'square brackets'],
['{', '}', 'curly brackets']
];
const counts = {};
const errors = new Set();
let i = 0;
while (i < textArea.value.length) {
let char = textArea.value[i];
let escaped = false;
while (char === '\\' && i + 1 < textArea.value.length) {
escaped = !escaped;
i++;
char = textArea.value[i];
}
if (escaped) {
i++;
continue;
}
for (const [open, close, label] of pairs) {
if (char === open) {
counts[label] = (counts[label] || 0) + 1;
} else if (char === close) {
counts[label] = (counts[label] || 0) - 1;
if (counts[label] < 0) {
errors.add(`Incorrect order of ${label}.`);
}
}
}
i++;
}
for (const [open, close, label] of pairs) {
if (counts[label] == undefined) {
continue;
}
if (counts[label] > 0) {
errors.add(`${open} ... ${close} - Detected ${counts[label]} more opening than closing ${label}.`);
} else if (counts[label] < 0) {
errors.add(`${open} ... ${close} - Detected ${-counts[label]} more closing than opening ${label}.`);
}
}
counterElem.title = [...errors].join('\n');
counterElem.classList.toggle('error', errors.size !== 0);
}
function setupBracketChecking(id_prompt, id_counter) {
const textarea = gradioApp().querySelector(`#${id_prompt} > label > textarea`);
const counter = gradioApp().getElementById(id_counter);
if (textarea && counter) {
onEdit(`${id_prompt}_BracketChecking`, textarea, 400, () => checkBrackets(textarea, counter));
}
}
onUiLoaded(function() {
setupBracketChecking('txt2img_prompt', 'txt2img_token_counter');
setupBracketChecking('txt2img_neg_prompt', 'txt2img_negative_token_counter');
setupBracketChecking('img2img_prompt', 'img2img_token_counter');
setupBracketChecking('img2img_neg_prompt', 'img2img_negative_token_counter');
});
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