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4526 lines (3871 loc) · 187 KB
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Problem Creator — MathQuill + PyScript (export structure fixed)</title>
<!-- MathQuill CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/mathquill/0.10.1/mathquill.min.css">
<!-- Quill.js -->
<link href="https://cdn.quilljs.com/1.3.7/quill.snow.css" rel="stylesheet">
<script src="https://cdn.quilljs.com/1.3.7/quill.js"></script>
<!-- MathJax -->
<script src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
<!-- PyScript -->
<link rel="stylesheet" href="https://pyscript.net/releases/2024.1.1/core.css" />
<script type="module" src="https://pyscript.net/releases/2024.1.1/core.js"></script>
<script>
// ============================================================================
// ASCIIMATH TO MATHQUILL KEYSTROKE PARSER
// ============================================================================
function parseSmartKeystrokes(text) {
const MAX_DEPTH = 5;
const greekLetters = {
'alpha': '\\alpha', 'beta': '\\beta', 'gamma': '\\gamma', 'delta': '\\delta',
'epsilon': '\\epsilon', 'zeta': '\\zeta', 'eta': '\\eta', 'theta': '\\theta',
'iota': '\\iota', 'kappa': '\\kappa', 'lambda': '\\lambda', 'mu': '\\mu',
'nu': '\\nu', 'xi': '\\xi', 'pi': '\\pi', 'rho': '\\rho', 'sigma': '\\sigma',
'tau': '\\tau', 'upsilon': '\\upsilon', 'phi': '\\phi', 'chi': '\\chi',
'psi': '\\psi', 'omega': '\\omega', 'Gamma': '\\Gamma', 'Delta': '\\Delta',
'Theta': '\\Theta', 'Lambda': '\\Lambda', 'Xi': '\\Xi', 'Pi': '\\Pi',
'Sigma': '\\Sigma', 'Phi': '\\Phi', 'Psi': '\\Psi', 'Omega': '\\Omega'
};
function pushInfty(keystrokes) {
for (const c of '\\infty') keystrokes.push(c);
keystrokes.push('{Tab}');
}
function unwrapParentheses(expr) {
expr = expr.trim();
if (expr.startsWith('(') && expr.endsWith(')')) {
let depth = 0;
for (let i = 0; i < expr.length; i++) {
if (expr[i] === '(') depth++;
else if (expr[i] === ')') depth--;
if (depth === 0 && i < expr.length - 1) return expr;
}
return expr.slice(1, -1);
}
return expr;
}
function extractParenContent(text, startIndex) {
let depth = 1, i = startIndex, content = '';
while (i < text.length && depth > 0) {
const c = text[i++];
if (c === '(') depth++;
else if (c === ')') depth--;
if (depth > 0) content += c;
}
return { content, end: i };
}
function processInlineContent(str, keystrokes, depth = 0) {
let j = 0;
while (j < str.length) {
if (str.substring(j, j + 2) === '->') {
for (const c of '\\to') keystrokes.push(c);
j += 2;
continue;
}
if (str.substring(j, j + 3) === 'inf') {
pushInfty(keystrokes);
j += 3;
continue;
}
const ch = str[j];
// division with parentheses: /(...)
if (ch === '/' && j + 1 < str.length && str[j + 1] === '(') {
keystrokes.push('/');
const { content, end } = extractParenContent(str, j + 2);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes, depth + 1);
keystrokes.push('{Right}');
j = end;
continue;
}
if ((ch === '^' || ch === '_') && depth < MAX_DEPTH) {
keystrokes.push(ch);
j++;
if (j < str.length && str[j] === '(') {
const { content, end } = extractParenContent(str, j + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes, depth + 1);
keystrokes.push('{Right}');
j = end;
} else {
let token = '';
while (j < str.length && /[0-9a-zA-Z]/.test(str[j])) token += str[j++];
if (token === 'inf') pushInfty(keystrokes);
else for (const c of token) keystrokes.push(c);
keystrokes.push('{Right}');
}
continue;
}
keystrokes.push(ch);
j++;
}
}
function handleSubSuperAtIndex(text, i, keystrokes, depth = 0) {
const char = text[i];
keystrokes.push(char);
i++;
if (i >= text.length) return i;
if (text.substring(i, i + 3) === 'inf') {
pushInfty(keystrokes);
i += 3;
return i;
}
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes, depth + 1);
keystrokes.push('{Right}');
return end;
}
let token = '';
while (i < text.length && /[0-9a-zA-Z]/.test(text[i])) token += text[i++];
if (token === 'inf') pushInfty(keystrokes);
else for (const c of token) keystrokes.push(c);
keystrokes.push('{Right}');
return i;
}
const keystrokes = [];
let i = 0;
while (i < text.length) {
// global inf
if (text.substring(i, i + 3) === 'inf') {
pushInfty(keystrokes);
i += 3;
continue;
}
// Greek
let greekMatched = false;
for (const [name, latex] of Object.entries(greekLetters)) {
if (text.substring(i, i + name.length) === name) {
const nextPos = i + name.length;
if (nextPos >= text.length || !/[a-zA-Z]/.test(text[nextPos])) {
for (const c of latex) keystrokes.push(c);
keystrokes.push('{Tab}');
i += name.length;
greekMatched = true;
break;
}
}
}
if (greekMatched) continue;
// derivative: d/dx(...)
if (text.substring(i, i + 3) === 'd/d' && i + 3 < text.length && /[a-zA-Z]/.test(text[i + 3])) {
const v = text[i + 3];
keystrokes.push('d');
keystrokes.push('/');
keystrokes.push('d');
keystrokes.push(v);
keystrokes.push('{Tab}');
i += 4;
if (i < text.length && text[i] === '(') {
keystrokes.push('(');
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
keystrokes.push(')');
i = end;
}
continue;
}
// abs
if (text.substring(i, i + 4) === 'abs(') {
const { content, end } = extractParenContent(text, i + 4);
keystrokes.push('|');
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
keystrokes.push('|');
i = end;
continue;
}
// sqrt
if (text.substring(i, i + 5) === 'sqrt(') {
for (const c of '\\sqrt') keystrokes.push(c);
keystrokes.push('{Tab}');
const { content, end } = extractParenContent(text, i + 5);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
keystrokes.push('{Right}');
i = end;
continue;
}
// ln
if (text.substring(i, i + 3) === 'ln(') {
for (const c of '\\ln') keystrokes.push(c);
keystrokes.push('{Tab}');
const { content, end } = extractParenContent(text, i + 3);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
keystrokes.push('{Right}');
i = end;
continue;
}
// lim_
if (text.substring(i, i + 4) === 'lim_' && text[i + 4] === '(') {
for (const c of '\\lim') keystrokes.push(c);
keystrokes.push('{Tab}');
const { content, end } = extractParenContent(text, i + 5);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
keystrokes.push('{Right}');
keystrokes.push('{Right}');
i = end;
continue;
}
// sum_
if (text.substring(i, i + 4) === 'sum_' && text[i + 4] === '(') {
for (const c of '\\sum') keystrokes.push(c);
keystrokes.push('{Tab}');
const { content, end } = extractParenContent(text, i + 5);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
keystrokes.push('{Tab}');
if (i < text.length && text[i] === '^') {
i++;
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
} else {
if (text.substring(i, i + 3) === 'inf') {
pushInfty(keystrokes);
i += 3;
} else {
let token = '';
while (i < text.length && /[0-9a-zA-Z]/.test(text[i])) token += text[i++];
if (token === 'inf') pushInfty(keystrokes);
else for (const c of token) keystrokes.push(c);
}
}
}
keystrokes.push('{Tab}');
continue;
}
// prod_
if (text.substring(i, i + 5) === 'prod_' && text[i + 5] === '(') {
for (const c of '\\prod') keystrokes.push(c);
keystrokes.push('{Tab}');
const { content, end } = extractParenContent(text, i + 6);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
keystrokes.push('{Tab}');
if (i < text.length && text[i] === '^') {
i++;
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
} else {
if (text.substring(i, i + 3) === 'inf') {
pushInfty(keystrokes);
i += 3;
} else {
let token = '';
while (i < text.length && /[0-9a-zA-Z]/.test(text[i])) token += text[i++];
if (token === 'inf') pushInfty(keystrokes);
else for (const c of token) keystrokes.push(c);
}
}
}
keystrokes.push('{Tab}');
continue;
}
// int_
if (text.substring(i, i + 4) === 'int_') {
for (const c of '\\int') keystrokes.push(c);
keystrokes.push('{Tab}');
i += 4;
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
} else {
if (text.substring(i, i + 3) === 'inf') {
pushInfty(keystrokes);
i += 3;
} else {
keystrokes.push(text[i++]);
}
}
keystrokes.push('{Tab}');
if (i < text.length && text[i] === '^') {
i++;
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
} else {
if (text.substring(i, i + 3) === 'inf') {
pushInfty(keystrokes);
i += 3;
} else {
let token = '';
while (i < text.length && /[0-9a-zA-Z]/.test(text[i])) token += text[i++];
if (token === 'inf') pushInfty(keystrokes);
else for (const c of token) keystrokes.push(c);
}
}
}
keystrokes.push('{Tab}');
continue;
}
// log_
if (text.substring(i, i + 4) === 'log_') {
for (const c of '\\log') keystrokes.push(c);
keystrokes.push('{Tab}');
keystrokes.push('_');
i += 4;
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
const inner = unwrapParentheses('(' + content + ')');
if (inner === 'inf') pushInfty(keystrokes);
else processInlineContent(inner, keystrokes);
i = end;
} else {
let base = '';
while (/[0-9a-zA-Z]/.test(text[i])) base += text[i++];
if (base === 'inf') pushInfty(keystrokes);
else for (const c of base) keystrokes.push(c);
}
keystrokes.push('{Right}');
if (text[i] === '(') {
const { content, end } = extractParenContent(text, i + 1);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
i = end;
}
keystrokes.push('{Right}');
keystrokes.push('{Right}');
continue;
}
// division with parentheses: /(...)
if (text[i] === '/' && i + 1 < text.length && text[i + 1] === '(') {
keystrokes.push('/');
const { content, end } = extractParenContent(text, i + 2);
processInlineContent(unwrapParentheses('(' + content + ')'), keystrokes);
keystrokes.push('{Right}');
i = end;
continue;
}
// generic ^/_ handling
if (text[i] === '^' || text[i] === '_') {
i = handleSubSuperAtIndex(text, i, keystrokes);
continue;
}
keystrokes.push(text[i++]);
}
return keystrokes;
}
// ============================================================================
// MATHQUILL KEYSTROKE SENDER
// ============================================================================
function sendKeystrokesToMathQuill(mathField, keystrokes) {
if (!mathField) {
console.error('MathField is null or undefined');
return false;
}
const cmdMap = {
'Right': 'Right',
'Left': 'Left',
'Up': 'Up',
'Down': 'Down',
'Tab': 'Tab',
'Enter': 'Enter',
'Backspace': 'Backspace'
};
function isCmdToken(s) {
return typeof s === 'string' && s.length > 2 && s[0] === '{' && s[s.length - 1] === '}';
}
try {
mathField.latex(''); // Clear first
for (const k of keystrokes) {
if (isCmdToken(k)) {
const cmd = k.slice(1, -1);
const mapped = cmdMap[cmd] || cmd;
try {
mathField.keystroke(mapped);
} catch (err) {
console.warn(`MathQuill keystroke failed for ${mapped}:`, err);
}
} else {
mathField.typedText(k);
}
}
return true;
} catch (error) {
console.error('Error sending keystrokes:', error);
return false;
}
}
// Export for Python access
window.parseSmartKeystrokes = parseSmartKeystrokes;
window.sendKeystrokesToMathQuill = sendKeystrokesToMathQuill;
</script>
<style>
body {
font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
max-width: 1100px;
margin: 20px auto;
background: #f3f6fb;
padding: 16px;
color: #0b1020;
}
header {
display: flex;
gap: 12px;
align-items: center;
margin-bottom: 20px;
}
header h1 {
margin: 0;
font-size: 20px;
}
.btn {
padding: 8px 12px;
border-radius: 8px;
border: none;
cursor: pointer;
background: #0b6efd;
color: #fff;
font-size: 14px;
font-weight: 500;
transition: all 0.2s ease;
}
.btn:hover {
transform: translateY(-1px);
box-shadow: 0 4px 12px rgba(11, 110, 253, 0.3);
}
.btn.ghost {
background: transparent;
color: #0b6efd;
border: 1px solid #dbe9ff;
}
.btn.ghost:hover {
background: rgba(11, 110, 253, 0.05);
}
.panel {
background: #fff;
padding: 12px;
border-radius: 10px;
box-shadow: 0 6px 20px rgba(11, 20, 40, 0.06);
margin-bottom: 12px;
}
label {
display: block;
font-weight: 600;
margin-bottom: 6px;
}
.editable {
min-height: 70px;
border: 2px solid #e6eef8;
padding: 8px;
border-radius: 8px;
background: #fff;
transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.toolbar {
display: flex;
gap: 8px;
margin-bottom: 8px;
}
.step {
border: 2px solid #e6eef8;
padding: 10px;
border-radius: 8px;
margin-bottom: 10px;
transition: all 0.3s ease;
background: #f8fafc;
}
.math-input {
min-height: 36px;
border: 2px solid #e6eef8;
border-radius: 8px;
padding: 6px;
background: #fff;
transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.math-inline {
display: inline-block;
min-width: 40px;
margin: 0 3px;
vertical-align: middle;
}
.img-inline {
display: inline-block;
max-width: 160px;
max-height: 120px;
margin: 4px;
vertical-align: middle;
}
.jsonbox {
background: #0b1220;
color: #cfeaff;
padding: 8px;
border-radius: 8px;
max-height: 260px;
overflow: auto;
font-family: monospace;
font-size: 13px;
}
/* ✅ Stronger borders and states */
.input-valid {
border-color: #22c55e !important; /* green */
box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}
.input-invalid {
border-color: #ef4444 !important; /* red */
box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}
.input-empty {
border-color: #f59e0b !important; /* orange */
box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}
.problem {
border: 2px solid #e2e8f0;
border-radius: 10px;
margin-bottom: 12px;
background: #ffffff;
box-shadow: 0 3px 8px rgba(0, 0, 0, 0.05);
}
.problem-header {
padding: 12px;
font-weight: 700;
cursor: pointer;
display: flex;
justify-content: space-between;
align-items: center;
background: #f0f4ff;
border-radius: 8px;
position: relative;
}
.problem-header::before {
content: '▼';
position: absolute;
left: 12px;
transition: transform 0.3s ease;
font-size: 12px;
color: #0b6efd;
}
.problem-header.collapsed::before {
transform: rotate(-90deg);
}
.problem-header > span {
margin-left: 20px;
}
.problem-header:hover {
background: #dbeafe;
}
.problem-body {
padding: 0 12px;
max-height: 2000px;
overflow: hidden;
transition: max-height 0.4s ease, padding 0.4s ease;
}
.problem-body.collapsed {
max-height: 0;
padding: 0 12px;
}
/* Overlay */
#loadingOverlay {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(15, 23, 42, 0.95);
z-index: 9999;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
color: #fff;
}
.spinner {
width: 60px;
height: 60px;
border: 4px solid rgba(59, 130, 246, 0.3);
border-top-color: #3b82f6;
border-radius: 50%;
animation: spin 1s linear infinite;
margin-bottom: 20px;
}
@keyframes spin {
to {
transform: rotate(360deg);
}
}
.loading-text {
font-size: 18px;
font-weight: 600;
margin-bottom: 8px;
}
#loadingStatus {
margin-top: 16px;
padding: 12px 20px;
background: rgba(30, 41, 59, 0.8);
border-radius: 8px;
font-family: monospace;
font-size: 13px;
color: #cbd5e1;
max-height: 200px;
overflow: auto;
width: 90%;
}
/* Quill Editor Styles */
.quill-container {
border: 2px solid #e6eef8;
border-radius: 8px;
background: #fff;
transition: border-color 0.25s ease, box-shadow 0.25s ease;
margin-bottom: 8px;
}
.quill-container .ql-toolbar {
border: none;
border-bottom: 2px solid #e6eef8;
background: #f8fafc;
border-radius: 8px 8px 0 0;
}
.quill-container .ql-container {
border: none;
min-height: 80px;
font-family: inherit;
font-size: 14px;
}
.quill-container .ql-editor {
min-height: 80px;
padding: 12px;
}
.quill-container .ql-editor p {
margin: 0;
}
.math-block-wrapper {
display: inline-block;
background: #f0f9ff;
padding: 4px 8px;
border-radius: 6px;
margin: 0 4px;
border: 1px solid #bae6fd;
}
.math-block-wrapper .math-inline {
display: inline-block;
min-width: 30px;
}
.quill-container.input-valid {
border-color: #22c55e !important;
box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}
.quill-container.input-invalid {
border-color: #ef4444 !important;
box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}
.quill-container.input-empty {
border-color: #f59e0b !important;
box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}
.ql-toolbar .ql-math {
width: auto !important;
background: transparent;
border: none;
cursor: pointer;
padding: 3px 5px;
color: #444;
}
.ql-toolbar .ql-math:hover {
color: #0b6efd;
background: rgba(11, 110, 253, 0.1);
}
</style>
</head>
<body>
<div id="loadingOverlay">
<div class="spinner"></div>
<div class="loading-text">Initializing Problem Creator...</div>
<div id="loadingStatus"><div>⏳ Starting up...</div></div>
</div>
<header>
<h1>📝 Problem Creator</h1>
</header>
<div class="panel">
<div style="display:flex; justify-content:space-between; align-items:center;">
<h3 style="margin:0;">Problem Set Creator</h3>
<div style="display:flex; gap:8px;">
<button id="addProblemBtn" class="btn">➕ Create Additional Problem</button>
<button id="exportAllBtn" class="btn ghost">📤 Share Problem Set to Students</button>
<button id="importProblemBtn" class="btn ghost">📥 Load Problem Set</button>
<button id="downloadJsonBtn" class="btn ghost">💾 Save Problem Set</button>
<button id="clearAutosaveBtn" class="btn ghost" style="color:#dc2626;">🗑️ Clear Autosave</button>
</div>
</div>
<div id="problemsContainer" style="margin-top:16px;"></div>
<!-- ADD THIS SECTION: Problem Set Description -->
<div style="margin-top:16px; margin-bottom:16px;">
<label>Problem Set Description</label>
<input id="problemSetDescription" type="text"
style="background:#f5eac3;width:100%; padding:8px; border:1px solid #0ea5e9; border-radius:6px; font-size:14px;"
placeholder="Enter a description for this problem set...">
<div class="small" style="margin-top:4px;">This description will be included when sharing the problem set with students.</div>
</div>
<div style="margin-top:20px;">
<div style="display:flex; justify-content:space-between; align-items:center; margin-bottom:8px;">
<label>Problem Set UUID</label>
<button id="copyUuidBtn" class="btn ghost" style="font-size:12px; padding:4px 8px;">📋 Copy UUID</button>
</div>
<div id="problemSetUuid" style="background:#f0f9ff; border:1px solid #0ea5e9; padding:8px; border-radius:6px; font-family:monospace; font-size:13px; color:#0369a1; margin-bottom:12px;">
No problem set loaded
</div>
<label>Exported JSON (Base64 compressed)</label>
<pre id="exportedJson" class="jsonbox">[]</pre>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathquill/0.10.1/mathquill.min.js"></script>
<py-config>
packages = ["sympy", "lark", "brotli"]
</py-config>
<script type="py">
from pyscript import document, window
from pyodide.ffi import create_proxy
import json, base64, brotli, html, re
import sympy as sp
from lark import Lark, Transformer, v_args
import uuid
# ============================================================================
# CORE CLASSES
# ============================================================================
class MathParser:
"""Handles LaTeX parsing, structural comparison, and error popups"""
GRAMMAR = r"""
start: matrix_ops
| expr
?expr: sum
?sum: sum "+" product -> add
| sum "-" product -> sub
| product
?product: scalar matrix -> scalar_matrix_mul
| scalar matrix_env -> scalar_matrix_mul
| product ("*" | "\\cdot" | "\\times" | "\\ast") implicit -> mul
| product "/" implicit -> div
| implicit
?implicit: implicit power -> implicit_mul
| power
?power: "-" power -> neg
| atom_degree -> atom_to_degree
| atom "^" power -> power
| atom
?atom: NUMBER -> number
| derivative_function
| partial_derivative_function
| trig_function
| log_function
| limit
| fraction
| matrix
| matrix_env
| abs_function
| "(" expr ")" -> paren_expr
| "{" expr "}" -> braces_expr
| PI -> pi_symbol
| INFTY -> infty_symbol
| SYMBOL -> symbol
| row_op
scalar: NUMBER | SYMBOL
trig_function: TRIG_NAME "(" expr ")" -> trig_func
log_function: LOG_NAME "(" expr ")" -> log_func
limit: LIM "_" "{" SYMBOL arrow expr "}" expr -> limit_expr
derivative_function: "__derivative" "(" SYMBOL "," expr ")" -> derivative_func
partial_derivative_function: "__partial_derivative" "(" SYMBOL "," expr ")" -> partial_derivative_func
fraction: "\\frac" "{" expr "}" "{" expr "}" -> frac
abs_function: "\\left" "|" expr "\\right" "|" -> abs_func
atom_degree: atom "^" degree_expr
degree_expr: "{" CIRC "}"
matrix: "[" matrix_rows "]" -> matrix_rows
matrix_rows: row ("," row)* -> matrix_rows
row: "[" elements "]" -> row
elements: expr ("," expr)* -> elements
matrix_env: "\\begin" "{" /(bmatrix|pmatrix|matrix)/ "}" matrix_env_body "\\end" "{" /(bmatrix|pmatrix|matrix)/ "}" -> matrix_env
matrix_env_body: matrix_env_row ( "\\\\" matrix_env_row )*
matrix_env_row: expr ( "&" expr )*
matrix_ops: matrix ("|" row_op)+ -> matrix_apply_ops
row_op: "R_" INT arrow row_expr -> row_replace
| "R_" INT swaparrow "R_" INT -> row_swap
arrow: TO | LEFTARROW | RIGHTARROW | ARROWRIGHT | ARROWLEFT
swaparrow: LEFTRIGHTARROW | SWAPLR
row_expr: "R_" INT -> row_reference
| expr "R_" INT -> row_scale
| "R_" INT op expr "R_" INT -> row_combine
op: "+" | "-"
TRIG_NAME.2: /\\sin|\\cos|\\tan|\\cot|\\sec|\\csc|\\arcsin|\\arccos|\\arctan/
LOG_NAME.2: /\\log|\\ln|\\exp/
LIM.2: "\\lim"
TO.2: "\\to"
LEFTARROW.2: "\\leftarrow"
RIGHTARROW.2: "\\rightarrow"
LEFTRIGHTARROW.2: "\\leftrightarrow"
ARROWRIGHT.2: "->"
ARROWLEFT.2: "<-"
SWAPLR.2: "<->"
NUMBER: /[+-]?\d+(\.\d*)?|\.\d+/
INT: /\d+/
PI.2: "\\pi"
INFTY.2: "\\infty"
SYMBOL: /\\?(?!(?:sin|cos|tan|cot|sec|csc|arcsin|arccos|arctan|log|ln|exp|frac|left|right|begin|end|pi|infty|lim|to|leftarrow|rightarrow|leftrightarrow|lvert|rvert)(?![a-zA-Z0-9]))[a-zA-Z][a-zA-Z0-9]*/
CIRC: "\\circ"
%import common.WS_INLINE
%ignore WS_INLINE
"""
def sympy_to_json_serializable(self, obj):
"""Convert SymPy objects to JSON-serializable format"""
import sympy as sp
if obj is None:
return None
# Handle SymPy numbers
if isinstance(obj, (sp.core.numbers.One, sp.core.numbers.Zero,
sp.core.numbers.NegativeOne)):
return int(obj)
if isinstance(obj, sp.Integer):
return int(obj)
if isinstance(obj, sp.Rational):
# Convert to float or keep as string "1/2"
return float(obj) # or: return str(obj) to keep as fraction
if isinstance(obj, sp.Float):
return float(obj)
# Handle SymPy matrices
if isinstance(obj, sp.MatrixBase):
return [[self.sympy_to_json_serializable(cell) for cell in row]
for row in obj.tolist()]
# Handle expressions - convert to string
if isinstance(obj, sp.Basic):
return str(obj)
# Handle lists/tuples recursively
if isinstance(obj, (list, tuple)):
return [self.sympy_to_json_serializable(item) for item in obj]
# Handle dicts recursively
if isinstance(obj, dict):
return {key: self.sympy_to_json_serializable(value)
for key, value in obj.items()}
# Return as-is for primitive types
return obj
def __init__(self):
from lark import Lark
self.update_status("⏳ Building parser...")
self.parser = Lark(self.GRAMMAR, parser="earley", start="start")
self.transformer = self._create_transformer()
self.update_status("✓ Parser ready")
def update_status(self, msg):
container = document.querySelector("#loadingStatus")
if container:
div = document.createElement("div")
div.appendChild(document.createTextNode(msg))
container.appendChild(div)
def _preprocess_row_operations(self, latex_str):
"""
Fix MathQuill's formatting of complex row operations.
Handles various patterns like fractions, negatives, and combinations.
Uses safer regex patterns to avoid infinite loops.