// ==UserScript==
// @name LaTeX Suite Snippets
// @namespace https://nekko-obsidian-latex-suite
// @version 0.7.1
// @description LaTeX snippets with full options, visual snippets, matrix shortcuts, brace-args jump (\frac{x}{y} -> Tab selects x/y), env switch, smart fraction, tabout, auto-enlarge, robust CE range replacement. Circle toggle.
// @match *://*/*
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_addStyle
// @run-at document-idle
// ==/UserScript==
(() => {
'use strict';
/*************************************************************************
* 配置
*************************************************************************/
const NON_AUTO_TRIGGER_KEY = 'Tab';
const FRACTION_CMD = "\\frac";
const EXCLUDED_ENVIRONMENTS = [ ["^{", "}"], ["\\pu{", "}"] ];
const BREAKING_CHARS = "+-=";
const TABOUT_ENABLED = true;
const AUTO_ENLARGE_ENABLED = true;
const AUTO_ENLARGE_TRIGGERS = ["\\sum", "\\int", "\\frac", "\\prod"];
const MATRIX_ENV_NAMES = [
"matrix", "pmatrix", "bmatrix", "Bmatrix", "vmatrix", "Vmatrix",
"array", "aligned", "align", "align*", "cases"
];
const ENV_CYCLES = [
["matrix", "pmatrix", "bmatrix", "Bmatrix", "vmatrix", "Vmatrix"],
["align", "align*", "aligned"],
["array"],
["cases"]
];
/*************************************************************************
* 你的 snippets（把你的数组粘贴到这里）
*************************************************************************/
const SNIPPETS = [
// Math mode
{trigger: "mk", replacement: "$$0$", options: "tA"},
{trigger: "dm", replacement: "$$\n$0\n$$", options: "tAw"},
{trigger: "beg", replacement: "\\begin{$0}\n$1\n\\end{$0}", options: "mA"},
// Dashes
// {trigger: "--", replacement: "–", options: "tA"},
// {trigger: "–-", replacement: "—", options: "tA"},
// {trigger: "—-", replacement: "---", options: "tA"},
// Greek letters
{trigger: "@a", replacement: "\\alpha", options: "mA"},
{trigger: "@A", replacement: "\\alpha", options: "mA"},
{trigger: "@b", replacement: "\\beta", options: "mA"},
{trigger: "@B", replacement: "\\beta", options: "mA"},
{trigger: "@c", replacement: "\\chi", options: "mA"},
{trigger: "@C", replacement: "\\chi", options: "mA"},
{trigger: "@g", replacement: "\\gamma", options: "mA"},
{trigger: "@G", replacement: "\\Gamma", options: "mA"},
{trigger: "@d", replacement: "\\delta", options: "mA"},
{trigger: "@D", replacement: "\\Delta", options: "mA"},
{trigger: "@e", replacement: "\\epsilon", options: "mA"},
{trigger: "@E", replacement: "\\epsilon", options: "mA"},
{trigger: ":e", replacement: "\\varepsilon", options: "mA"},
{trigger: ":E", replacement: "\\varepsilon", options: "mA"},
{trigger: "@z", replacement: "\\zeta", options: "mA"},
{trigger: "@Z", replacement: "\\zeta", options: "mA"},
{trigger: "@t", replacement: "\\theta", options: "mA"},
{trigger: "@T", replacement: "\\Theta", options: "mA"},
{trigger: "@k", replacement: "\\kappa", options: "mA"},
{trigger: "@K", replacement: "\\kappa", options: "mA"},
{trigger: "@l", replacement: "\\lambda", options: "mA"},
{trigger: "@L", replacement: "\\Lambda", options: "mA"},
{trigger: "@m", replacement: "\\mu", options: "mA"},
{trigger: "@M", replacement: "\\mu", options: "mA"},
{trigger: "@r", replacement: "\\rho", options: "mA"},
{trigger: "@R", replacement: "\\rho", options: "mA"},
{trigger: "@s", replacement: "\\sigma", options: "mA"},
{trigger: "@S", replacement: "\\Sigma", options: "mA"},
{trigger: "ome", replacement: "\\omega", options: "mA"},
{trigger: "@o", replacement: "\\omega", options: "mA"},
{trigger: "@O", replacement: "\\Omega", options: "mA"},
{trigger: "([^\\\\])(${GREEK}|${SYMBOL})", replacement: "[[0]]\\[[1]]", options: "rmA", description: "Add backslash before greek letters and symbols"},
// Insert space after greek letters and symbols, etc
{trigger: "\\\\(${GREEK}|${SYMBOL}|${SHORT_SYMBOL})([A-Za-z])", replacement: "\\[[0]] [[1]]", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) sr", replacement: "\\[[0]]^{2}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) cb", replacement: "\\[[0]]^{3}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) rd", replacement: "\\[[0]]^{$0}$1", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) hat", replacement: "\\hat{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) dot", replacement: "\\dot{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) bar", replacement: "\\bar{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) vec", replacement: "\\vec{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) tilde", replacement: "\\tilde{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK}|${SYMBOL}) und", replacement: "\\underline{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK}),\\.", replacement: "\\boldsymbol{\\[[0]]}", options: "rmA"},
{trigger: "\\\\(${GREEK})\\.,", replacement: "\\boldsymbol{\\[[0]]}", options: "rmA"},
// Operations
{trigger: "te", replacement: "\\text{$0}", options: "m"},
{trigger: "text", replacement: "\\text{$0}", options: "mA"},
{trigger: "bf", replacement: "\\mathbf{$0}", options: "mA"},
{trigger: "sr", replacement: "^{2}", options: "mA"},
{trigger: "cb", replacement: "^{3}", options: "mA"},
{trigger: "rd", replacement: "^{$0}$1", options: "mA"},
{trigger: "_", replacement: "_{$0}$1", options: "mA"},
{trigger: "sts", replacement: "_\\text{$0}", options: "rmA"},
{trigger: "sq", replacement: "\\sqrt{ $0 }$1", options: "mA"},
{trigger: "//", replacement: "\\frac{$0}{$1}$2", options: "mA"},
{trigger: "ee", replacement: "e^{ $0 }$1", options: "mA"},
{trigger: "rm", replacement: "\\mathrm{$0}$1", options: "mA"},
{trigger: "conj", replacement: "^{*}", options: "mA"},
{trigger: "trace", replacement: "\\mathrm{Tr}", options: "mA"},
{trigger: "det", replacement: "\\det", options: "mA"},
{trigger: "re", replacement: "\\mathrm{Re}", options: "mA"},
{trigger: "im", replacement: "\\mathrm{Im}", options: "mA"},
{trigger: "([a-zA-Z]),\\.", replacement: "\\mathbf{[[0]]}", options: "rmA"},
{trigger: "([a-zA-Z])\\.,", replacement: "\\mathbf{[[0]]}", options: "rmA"},
{trigger: "([A-Za-z])(\\d)", replacement: "[[0]]_{[[1]]}", options: "rmA", description: "Auto letter subscript", priority: -1},
{trigger: "([A-Za-z])_(\\d\\d)", replacement: "[[0]]_{[[1]]}", options: "rmA"},
{trigger: "\\hat{([A-Za-z])}(\\d)", replacement: "hat{[[0]]}_{[[1]]}", options: "rmA"},
{trigger: "\\\\mathbf{([A-Za-z])}(\\d)", replacement: "\\mathbf{[[0]]}_{[[1]]}", options: "rmA"},
{trigger: "\\\\vec{([A-Za-z])}(\\d)", replacement: "\\vec{[[0]]}_{[[1]]}", options: "rmA"},
{trigger: "([a-zA-Z])bar", replacement: "\\bar{[[0]]}", options: "rmA"},
{trigger: "([a-zA-Z])hat", replacement: "\\hat{[[0]]}", options: "rmA"},
{trigger: "([a-zA-Z])ddot", replacement: "\\ddot{[[0]]}", options: "rmA", priority: 3},
{trigger: "([a-zA-Z])dot", replacement: "\\dot{[[0]]}", options: "rmA", priority: 1},
{trigger: "([a-zA-Z])vec", replacement: "\\vec{[[0]]}", options: "rmA"},
{trigger: "([a-zA-Z])tilde", replacement: "\\tilde{[[0]]}", options: "rmA"},
{trigger: "([a-zA-Z])und", replacement: "\\underline{[[0]]}", options: "rmA"},
{trigger: "bar", replacement: "\\bar{$0}$1", options: "mA"},
{trigger: "hat", replacement: "\\hat{$0}$1", options: "mA"},
{trigger: "dot", replacement: "\\dot{$0}$1", options: "mA"},
{trigger: "ddot", replacement: "\\ddot{$0}$1", options: "mA", priority: 2},
{trigger: "cdot", replacement: "\\cdot", options: "mA", priority: 2},
{trigger: "vec", replacement: "\\vec{$0}$1", options: "mA"},
{trigger: "tilde", replacement: "\\tilde{$0}$1", options: "mA"},
{trigger: "und", replacement: "\\underline{$0}$1", options: "mA"},
{trigger: "([^\\\\])(arcsin|arccos|arctan|arccot|arccsc|arcsec|sin|cos|tan|cot|csc|sec)", replacement: "[[0]]\\[[1]]", options: "rmA"},
{trigger: "\\\\(arcsin|arccos|arctan|arccot|arccsc|arcsec|sin|cos|tan|cot|csc|sec)([A-Za-gi-z])", replacement: "\\[[0]] [[1]]", options: "rmA"}, // Insert space after trig funcs. Skips letter "h" to allow sinh, cosh, etc.
{trigger: "\\\\(arcsinh|arccosh|arctanh|arccoth|arcsch|arcsech|sinh|cosh|tanh|coth|csch|sech)([A-Za-z])", replacement: "\\[[0]] [[1]]", options: "rmA"}, // Insert space after trig funcs
{trigger: "\\\\(neq|geq|leq|gg|ll|sim)([0-9]+)", replacement: "\\[[0]] [[1]]", options: "rmA"}, // Insert space after inequality symbols
// Visual operations
{trigger: "U", replacement: "\\underbrace{ ${VISUAL} }_{ $0 }", options: "mA"},
{trigger: "B", replacement: "\\underset{ $0 }{ ${VISUAL} }", options: "mA"},
{trigger: "C", replacement: "\\cancel{ ${VISUAL} }", options: "mA"},
{trigger: "K", replacement: "\\cancelto{ $0 }{ ${VISUAL} }", options: "mA"},
{trigger: "S", replacement: "\\sqrt{ ${VISUAL} }", options: "mA"},
// Symbols
{trigger: "ooo", replacement: "\\infty", options: "mA"},
{trigger: "sum", replacement: "\\sum", options: "mA"},
{trigger: "prod", replacement: "\\prod", options: "mA"},
{trigger: "lim", replacement: "\\lim_{ ${0:n} \\to ${1:\\infty} } $2", options: "mA"},
{trigger: "([^\\\\])pm", replacement: "[[0]]\\pm", options: "rm"},
{trigger: "([^\\\\])mp", replacement: "[[0]]\\mp", options: "rm"},
{trigger: "+-", replacement: "\\pm", options: "mA"},
{trigger: "-+", replacement: "\\mp", options: "mA"},
{trigger: "...", replacement: "\\dots", options: "mA"},
{trigger: "<->", replacement: "\\leftrightarrow ", options: "mA"},
{trigger: "->", replacement: "\\to", options: "mA"},
{trigger: "!>", replacement: "\\mapsto", options: "mA"},
{trigger: "invs", replacement: "^{-1}", options: "mA"},
{trigger: "\\\\\\", replacement: "\\setminus", options: "mA"},
{trigger: "||", replacement: "\\mid", options: "mA"},
{trigger: "and", replacement: "\\cap", options: "mA"},
{trigger: "orr", replacement: "\\cup", options: "mA"},
{trigger: "inn", replacement: "\\in", options: "mA"},
{trigger: "\\subset eq", replacement: "\\subseteq", options: "mA"},
{trigger: "set", replacement: "\\{ $0 \\}$1", options: "mA"},
{trigger: "=>", replacement: "\\implies", options: "mA"},
{trigger: "=<", replacement: "\\impliedby", options: "mA"},
{trigger: "iff", replacement: "\\iff", options: "mA"},
{trigger: "e\\xi sts", replacement: "\\exists", options: "mA", priority: 1},
{trigger: "===", replacement: "\\equiv", options: "mA"},
{trigger: "Sq", replacement: "\\square", options: "mA"},
{trigger: "!=", replacement: "\\neq", options: "mA"},
{trigger: ">=", replacement: "\\geq", options: "mA"},
{trigger: "<=", replacement: "\\leq", options: "mA"},
{trigger: ">>", replacement: "\\gg", options: "mA"},
{trigger: "<<", replacement: "\\ll", options: "mA"},
{trigger: "~~", replacement: "\\sim", options: "mA"},
{trigger: "\\sim ~", replacement: "\\approx", options: "mA"},
{trigger: "prop", replacement: "\\propto", options: "mA"},
{trigger: "nabl", replacement: "\\nabla", options: "mA"},
{trigger: "del", replacement: "\\nabla", options: "mA"},
{trigger: "xx", replacement: "\\times", options: "mA"},
{trigger: "**", replacement: "\\cdot", options: "mA"},
{trigger: "para", replacement: "\\parallel", options: "mA"},
{trigger: "xnn", replacement: "x_{n}", options: "mA"},
{trigger: "xii", replacement: "x_{i}", options: "mA"},
{trigger: "xjj", replacement: "x_{j}", options: "mA"},
{trigger: "xp1", replacement: "x_{n+1}", options: "mA"},
{trigger: "ynn", replacement: "y_{n}", options: "mA"},
{trigger: "yii", replacement: "y_{i}", options: "mA"},
{trigger: "yjj", replacement: "y_{j}", options: "mA"},
{trigger: "mcal", replacement: "\\mathcal{$0}$1", options: "mA"},
{trigger: "mbb", replacement: "\\mathbb{$0}$1", options: "mA"},
{trigger: "ell", replacement: "\\ell", options: "mA"},
{trigger: "lll", replacement: "\\ell", options: "mA"},
{trigger: "LL", replacement: "\\mathcal{L}", options: "mA"},
{trigger: "HH", replacement: "\\mathcal{H}", options: "mA"},
{trigger: "CC", replacement: "\\mathbb{C}", options: "mA"},
{trigger: "RR", replacement: "\\mathbb{R}", options: "mA"},
{trigger: "ZZ", replacement: "\\mathbb{Z}", options: "mA"},
{trigger: "NN", replacement: "\\mathbb{N}", options: "mA"},
{trigger: "II", replacement: "\\mathbb{1}", options: "mA"},
{trigger: "\\mathbb{1}I", replacement: "\\hat{\\mathbb{1}}", options: "mA"},
{trigger: "AA", replacement: "\\mathcal{A}", options: "mA"},
{trigger: "BB", replacement: "\\mathbf{B}", options: "mA"},
{trigger: "EE", replacement: "\\mathbf{E}", options: "mA"},
// Unit vectors
{trigger: ":i", replacement: "\\mathbf{i}", options: "mA"},
{trigger: ":j", replacement: "\\mathbf{j}", options: "mA"},
{trigger: ":k", replacement: "\\mathbf{k}", options: "mA"},
{trigger: ":x", replacement: "\\hat{\\mathbf{x}}", options: "mA"},
{trigger: ":y", replacement: "\\hat{\\mathbf{y}}", options: "mA"},
{trigger: ":z", replacement: "\\hat{\\mathbf{z}}", options: "mA"},
// Derivatives
{trigger: "par", replacement: "\\frac{ \\partial ${0:y} }{ \\partial ${1:x} } $2", options: "m"},
{trigger: "pa2", replacement: "\\frac{ \\partial^{2} ${0:y} }{ \\partial ${1:x}^{2} } $2", options: "mA"},
{trigger: "pa3", replacement: "\\frac{ \\partial^{3} ${0:y} }{ \\partial ${1:x}^{3} } $2", options: "mA"},
{trigger: "pa([A-Za-z])([A-Za-z])", replacement: "\\frac{ \\partial [[0]] }{ \\partial [[1]] } ", options: "rm"},
{trigger: "pa([A-Za-z])([A-Za-z])([A-Za-z])", replacement: "\\frac{ \\partial^{2} [[0]] }{ \\partial [[1]] \\partial [[2]] } ", options: "rm"},
{trigger: "pa([A-Za-z])([A-Za-z])2", replacement: "\\frac{ \\partial^{2} [[0]] }{ \\partial [[1]]^{2} } ", options: "rmA"},
{trigger: "de([A-Za-z])([A-Za-z])", replacement: "\\frac{ d[[0]] }{ d[[1]] } ", options: "rm"},
{trigger: "de([A-Za-z])([A-Za-z])2", replacement: "\\frac{ d^{2}[[0]] }{ d[[1]]^{2} } ", options: "rmA"},
{trigger: "ddt", replacement: "\\frac{d}{dt} ", options: "mA"},
// Integrals
{trigger: "oinf", replacement: "\\int_{0}^{\\infty} $0 \\, d${1:x} $2", options: "mA"},
{trigger: "infi", replacement: "\\int_{-\\infty}^{\\infty} $0 \\, d${1:x} $2", options: "mA"},
{trigger: "dint", replacement: "\\int_{${0:0}}^{${1:\\infty}} $2 \\, d${3:x} $4", options: "mA"},
{trigger: "oint", replacement: "\\oint", options: "mA"},
{trigger: "iiint", replacement: "\\iiint", options: "mA"},
{trigger: "iint", replacement: "\\iint", options: "mA"},
{trigger: "int", replacement: "\\int $0 \\, d${1:x} $2", options: "mA"},
// Physics
{trigger: "kbt", replacement: "k_{B}T", options: "mA"},
// Quantum mechanics
{trigger: "hba", replacement: "\\hbar", options: "mA"},
{trigger: "dag", replacement: "^{\\dagger}", options: "mA"},
{trigger: "o+", replacement: "\\oplus ", options: "mA"},
{trigger: "ox", replacement: "\\otimes ", options: "mA"},
{trigger: "ot\\mathrm{Im}es", replacement: "\\otimes ", options: "mA"}, // Handle conflict with "im" snippet
{trigger: "bra", replacement: "\\bra{$0} $1", options: "mA"},
{trigger: "ket", replacement: "\\ket{$0} $1", options: "mA"},
{trigger: "brk", replacement: "\\braket{ $0 | $1 } $2", options: "mA"},
{trigger: "\\\\bra{([^|]+)\\|", replacement: "\\braket{ [[0]] | $0 ", options: "rmA", description: "Convert bra into braket"},
{trigger: "\\\\bra{(.+)}([^ ]+)>", replacement: "\\braket{ [[0]] | $0 ", options: "rmA", description: "Convert bra into braket (alternate)"},
{trigger: "outp", replacement: "\\ket{${0:\\psi}} \\bra{${0:\\psi}} $1", options: "mA"},
// Chemistry
{trigger: "pu", replacement: "\\pu{ $0 }", options: "mA"},
{trigger: "msun", replacement: "M_{\\odot}", options: "mA"},
{trigger: "solm", replacement: "M_{\\odot}", options: "mA"},
{trigger: "ce", replacement: "\\ce{ $0 }", options: "mA"},
{trigger: "iso", replacement: "{}^{${0:4}}_{${1:2}}${2:He}", options: "mA"},
{trigger: "hel4", replacement: "{}^{4}_{2}He ", options: "mA"},
{trigger: "hel3", replacement: "{}^{3}_{2}He ", options: "mA"},
// Environments
{trigger: "pmat", replacement: "\\begin{pmatrix}\n$0\n\\end{pmatrix}", options: "mA"},
{trigger: "bmat", replacement: "\\begin{bmatrix}\n$0\n\\end{bmatrix}", options: "mA"},
{trigger: "Bmat", replacement: "\\begin{Bmatrix}\n$0\n\\end{Bmatrix}", options: "mA"},
{trigger: "vmat", replacement: "\\begin{vmatrix}\n$0\n\\end{vmatrix}", options: "mA"},
{trigger: "Vmat", replacement: "\\begin{Vmatrix}\n$0\n\\end{Vmatrix}", options: "mA"},
{trigger: "case", replacement: "\\begin{cases}\n$0\n\\end{cases}", options: "mA"},
{trigger: "align", replacement: "\\begin{align}\n$0\n\\end{align}", options: "mA"},
{trigger: "array", replacement: "\\begin{array}\n$0\n\\end{array}", options: "mA"},
{trigger: "matrix", replacement: "\\begin{matrix}\n$0\n\\end{matrix}", options: "mA"},
// Brackets
{trigger: "avg", replacement: "\\langle $0 \\rangle $1", options: "mA"},
{trigger: "norm", replacement: "\\lvert $0 \\rvert $1", options: "mA", priority: 1},
{trigger: "mod", replacement: "|$0|$1", options: "mA"},
{trigger: "(", replacement: "(${VISUAL})", options: "mA"},
{trigger: "[", replacement: "[${VISUAL}]", options: "mA"},
{trigger: "{", replacement: "{${VISUAL}}", options: "mA"},
{trigger: "(", replacement: "($0)$1", options: "mA"},
{trigger: "{", replacement: "{$0}$1", options: "mA"},
{trigger: "[", replacement: "[$0]$1", options: "mA"},
{trigger: "lr(", replacement: "\\left( $0 \\right) $1", options: "mA"},
{trigger: "lr|", replacement: "\\left| $0 \\right| $1", options: "mA"},
{trigger: "lr{", replacement: "\\left\\{ $0 \\right\\} $1", options: "mA"},
{trigger: "lr[", replacement: "\\left[ $0 \\right] $1", options: "mA"},
{trigger: "lra", replacement: "\\left< $0 \\right> $1", options: "mA"},
// Misc
{trigger: "tayl", replacement: "${0:f}(${1:x} + ${2:h}) = ${0:f}(${1:x}) + ${0:f}'(${1:x})${2:h} + ${0:f}''(${1:x}) \\frac{${2:h}^{2}}{2!} + \\dots$3", options: "mA"},
];
/*************************************************************************
* 状态
*************************************************************************/
const MAX_LOOKBEHIND = 256;
const CARET_TOKEN = '\uFFF9';
const FIELD_START = '\uFFF0';
const FIELD_END = '\uFFF1';
const STORE_KEY_ENABLED = 'latex_suite_enabled';
const STORE_KEY_BTN_POS = 'latex_suite_button_pos';
// 默认 OFF
let enabled = !!GM_getValue(STORE_KEY_ENABLED, false);
let _latexSuiteBusy = false;
let _isComposing = false;
let _allowOnceAfterComposition = false;
/*************************************************************************
* 圆形小球按钮（右上角，拖动，ON=不透明，OFF=0.5）
*************************************************************************/
GM_addStyle(`
.latex-suite-toggle {
position: fixed; top: 12px; right: 12px; z-index: 2147483647;
width: 44px; height: 44px; border-radius: 50%;
box-shadow: 0 2px 10px rgba(0,0,0,0.2);
cursor: move; user-select: none;
display: flex; align-items: center; justify-content: center;
color: #fff; font-size: 12px; font-family: system-ui,-apple-system,"Segoe UI",Roboto,Arial,"Noto Sans","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
background: #22c55e;
opacity: ${enabled ? '1' : '0.5'};
}
.latex-suite-off { background: #ef4444; }
`);
const btn = document.createElement('div');
btn.className = `latex-suite-toggle ${enabled ? '' : 'latex-suite-off'}`;
btn.textContent = 'La';
document.documentElement.appendChild(btn);
(function restoreBtnPos() {
const pos = GM_getValue(STORE_KEY_BTN_POS);
if (!pos) return;
const { top, left } = pos;
btn.style.top = top + 'px';
btn.style.left = left + 'px';
btn.style.right = 'unset';
})();
(function initDragAndToggle() {
let dragging = false, moved = false, startX = 0, startY = 0, startTop = 0, startLeft = 0;
btn.addEventListener('mousedown', (e) => {
dragging = true; moved = false; btn.style.cursor = 'grabbing';
startX = e.clientX; startY = e.clientY;
const r = btn.getBoundingClientRect(); startTop = r.top; startLeft = r.left;
e.preventDefault();
});
window.addEventListener('mousemove', (e) => {
if (!dragging) return;
const dx = e.clientX - startX, dy = e.clientY - startY;
if (Math.abs(dx) > 2 || Math.abs(dy) > 2) moved = true;
btn.style.top = Math.max(0, startTop + dy) + 'px';
btn.style.left = Math.max(0, startLeft + dx) + 'px';
btn.style.right = 'unset';
}, true);
window.addEventListener('mouseup', () => {
if (!dragging) return; dragging = false; btn.style.cursor = 'move';
if (!moved) {
enabled = !enabled;
GM_setValue(STORE_KEY_ENABLED, enabled);
btn.classList.toggle('latex-suite-off', !enabled);
btn.style.opacity = enabled ? '1' : '0.5';
} else {
const r = btn.getBoundingClientRect();
GM_setValue(STORE_KEY_BTN_POS, { top: r.top, left: r.left });
}
}, true);
})();
/*************************************************************************
* 编辑区/CE 工具
*************************************************************************/
function getActiveEditable() {
const el = document.activeElement;
if (!el) return null;
const isTextarea = el.tagName === 'TEXTAREA' || (el.tagName === 'INPUT' && el.type === 'text');
const isCE = el.isContentEditable;
if (isTextarea || isCE) return el;
return null;
}
function getSelectionInCE(root) {
const sel = window.getSelection();
if (!sel || sel.rangeCount === 0) return null;
const range = sel.getRangeAt(0);
if (!root.contains(range.startContainer)) return null;
return range;
}
function getTextAndCaret(el) {
if (el.tagName === 'TEXTAREA' || el.tagName === 'INPUT') {
return { type: 'textarea', text: el.value, start: el.selectionStart, end: el.selectionEnd };
} else {
const range = getSelectionInCE(el); if (!range) return null;
const walker = document.createTreeWalker(el, NodeFilter.SHOW_TEXT, null);
let text = '', startOff = -1, endOff = -1, cur = 0;
while (walker.nextNode()) {
const node = walker.currentNode;
if (node === range.startContainer) startOff = cur + range.startOffset;
if (node === range.endContainer) endOff = cur + range.endOffset;
text += node.nodeValue; cur += node.nodeValue.length;
}
return { type: 'contenteditable', text, start: Math.min(startOff, endOff), end: Math.max(startOff, endOff), root: el };
}
}
function locateNodeByOffset(root, targetOffset) {
const walker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, null);
let offset = 0;
while (walker.nextNode()) {
const node = walker.currentNode;
const next = offset + node.nodeValue.length;
if (targetOffset <= next) return { node, local: targetOffset - offset };
offset = next;
}
return { node: root, local: root.childNodes.length };
}
function setCaretOnly(ed, sel, newPos) {
if (sel.type === 'textarea') {
ed.setSelectionRange(newPos, newPos);
ed.dispatchEvent(new InputEvent('input', { bubbles: true }));
} else {
const range = document.createRange();
const { node, local } = locateNodeByOffset(ed, newPos);
if (node.nodeType === Node.TEXT_NODE) range.setStart(node, local);
else range.setStart(ed, ed.childNodes.length);
range.collapse(true);
const s = window.getSelection(); s.removeAllRanges(); s.addRange(range);
ed.dispatchEvent(new InputEvent('input', { bubbles: true }));
}
}
function setSelectionInEditor(ed, sel, start, end) {
if (sel.type === 'textarea') {
ed.setSelectionRange(start, end);
ed.dispatchEvent(new InputEvent('input', { bubbles: true }));
} else {
const a = locateNodeByOffset(ed, start);
const b = locateNodeByOffset(ed, end);
const range = document.createRange();
if (a.node.nodeType === Node.TEXT_NODE) range.setStart(a.node, a.local);
else range.setStart(ed, ed.childNodes.length);
if (b.node.nodeType === Node.TEXT_NODE) range.setEnd(b.node, b.local);
else range.setEnd(ed, ed.childNodes.length);
const s = window.getSelection(); s.removeAllRanges(); s.addRange(range);
ed.dispatchEvent(new InputEvent('input', { bubbles: true }));
}
}
function replaceRangeInEditor(ed, sel, start, end, replacement, newCaret) {
if (sel.type === 'textarea') {
ed.setSelectionRange(start, end);
ed.setRangeText(replacement, start, end, 'end');
ed.setSelectionRange(newCaret, newCaret);
ed.dispatchEvent(new InputEvent('input', { bubbles: true }));
} else {
const range = document.createRange();
const a = locateNodeByOffset(ed, start);
const b = locateNodeByOffset(ed, end);
if (a.node.nodeType === Node.TEXT_NODE) range.setStart(a.node, a.local);
else range.setStart(ed, ed.childNodes.length);
if (b.node.nodeType === Node.TEXT_NODE) range.setEnd(b.node, b.local);
else range.setEnd(ed, ed.childNodes.length);
range.deleteContents();
const textNode = document.createTextNode(replacement);
range.insertNode(textNode);
const caretRange = document.createRange();
const caretLocal = Math.max(0, Math.min(replacement.length, newCaret - start));
caretRange.setStart(textNode, caretLocal);
caretRange.collapse(true);
const s = window.getSelection(); s.removeAllRanges(); s.addRange(caretRange);
ed.dispatchEvent(new InputEvent('input', { bubbles: true }));
}
}
/*************************************************************************
* 组合输入保护
*************************************************************************/
window.addEventListener('compositionstart', () => { _isComposing = true; }, true);
window.addEventListener('compositionend', () => {
_isComposing = false; _allowOnceAfterComposition = true;
setTimeout(() => { _allowOnceAfterComposition = false; }, 0);
}, true);
function isCharacterInsertion(e) {
if (!(e instanceof InputEvent)) return false;
if (_isComposing) return false;
const t = e.inputType || '';
if (t === 'insertText' || t === 'insertCompositionText') return true;
if (_allowOnceAfterComposition) return true;
return false;
}
/*************************************************************************
* 模式与数学判断
*************************************************************************/
function isInsideCodeFence(text, pos) {
const fence = /```/g; let count = 0, m;
while ((m = fence.exec(text)) && m.index < pos) count++;
return (count % 2) === 1;
}
function isEscaped(text, idx) {
let backslashes = 0; for (let i = idx - 1; i >= 0 && text[i] === '\\'; i--) backslashes++;
return (backslashes % 2) === 1;
}
function nearestUnescapedPairPositions(text, pos, token) {
const re = token === '$$' ? /\$\$/g : /\$/g;
const idxs = []; let m;
while ((m = re.exec(text))) { if (!isEscaped(text, m.index)) idxs.push(m.index); }
let left = -1, right = -1;
for (let i = 0; i < idxs.length; i++) {
const a = idxs[i], b = idxs[i + 1];
if (a < pos && b !== undefined && b > pos) { left = a; right = b; break; }
}
return { left, right };
}
function inBlockMath(text, pos) {
const { left, right } = nearestUnescapedPairPositions(text, pos, '$$');
return left !== -1 && right !== -1;
}
function inInlineMath(text, pos) {
if (inBlockMath(text, pos)) return false;
const { left, right } = nearestUnescapedPairPositions(text, pos, '$');
return left !== -1 && right !== -1;
}
function inMath(text, pos) { return inInlineMath(text, pos) || inBlockMath(text, pos); }
/*************************************************************************
* 词边界 / 模式过滤
*************************************************************************/
function passesModeOptions(options, fullText, caretPos) {
if (!options) return true;
const inCode = isInsideCodeFence(fullText, caretPos);
const inBlk = inBlockMath(fullText, caretPos);
const inInl = inInlineMath(fullText, caretPos);
const inM = inBlk || inInl;
if (options.includes('c') && !inCode) return false;
if (options.includes('t') && inM) return false;
if (options.includes('m') && !inM) return false;
if (options.includes('M') && !inBlk) return false;
if (options.includes('n') && !inInl) return false;
return true;
}
function passesWordBoundary(options, fullText, from, to) {
if (!options || !options.includes('w')) return true;
const isDelim = (ch) => { if (!ch) return true; return /\s|[.,;:!?()\[\]{}<>\-+*/=|\\]/.test(ch); };
const prev = fullText[from - 1];
const next = fullText[to];
return isDelim(prev) && isDelim(next);
}
/*************************************************************************
* 触发匹配
*************************************************************************/
function matchSnippet(beforeText, fullText, caretPos, snippet) {
const { trigger, options = '' } = snippet;
const hay = beforeText.slice(-MAX_LOOKBEHIND);
if (!passesModeOptions(options, fullText, caretPos)) return null;
function prevCharIsBackslash(globalBefore, fromIndex) {
const prevIdx = fromIndex - 1; if (prevIdx < 0) return false;
return globalBefore[prevIdx] === '\\';
}
if (options.includes('r')) {
let re; try { re = new RegExp(trigger + '$', options.includes('m') ? 'm' : ''); } catch { return null; }
const m = hay.match(re); if (!m) return null;
const from = beforeText.length - m[0].length;
const globalFrom = caretPos - m[0].length, globalTo = caretPos;
if (!passesWordBoundary(options, fullText, globalFrom, globalTo)) return null;
if (prevCharIsBackslash(fullText, globalFrom)) return null;
return { from: globalFrom, to: globalTo, match: m };
} else {
if (!hay.endsWith(trigger)) return null;
const globalFrom = caretPos - trigger.length, globalTo = caretPos;
if (!passesWordBoundary(options, fullText, globalFrom, globalTo)) return null;
if (prevCharIsBackslash(fullText, globalFrom)) return null;
return { from: globalFrom, to: globalTo, match: null };
}
}
/*************************************************************************
* expand（就地）
*************************************************************************/
function parseSnippetTemplate(tpl, visualText = '') {
tpl = tpl.replace(/\$\{?VISUAL\}?/g, visualText);
const fields = [];
tpl = tpl.replace(/\$\{(\d+):([^}]*)\}/g, (m, nStr, def) => FIELD_START + parseInt(nStr, 10) + ':' + def + FIELD_END);
tpl = tpl.replace(/\$(\d+)/g, (m, nStr) => FIELD_START + parseInt(nStr, 10) + ':' + '' + FIELD_END);
tpl = tpl.replace(/\$0/g, CARET_TOKEN);
let out = '', i = 0;
while (i < tpl.length) {
if (tpl[i] === FIELD_START) {
let j = i + 1, buf = '';
while (j < tpl.length && tpl[j] !== FIELD_END) buf += tpl[j++];
const m = buf.match(/^(\d+):(.*)$/s);
const n = parseInt(m[1], 10), def = m[2];
const start = out.length; out += def; const end = out.length;
fields.push({ n, start, end }); i = j + 1;
} else { out += tpl[i++]; }
}
const caretIndex = out.indexOf(CARET_TOKEN);
const text = out.replace(CARET_TOKEN, '');
fields.sort((a, b) => a.n - b.n);
return { text, fields, caret: (caretIndex === -1 ? null : caretIndex) };
}
function expandWithSnippet(ed, sel, snip, m, visualText = '') {
let replTpl = snip.replacement;
if (m && m.match && m.match.length && /\[\[\d+\]\]/.test(replTpl)) {
replTpl = replTpl.replace(/\[\[(\d+)\]\]/g, (mm, k) => m.match[parseInt(k, 10)] ?? '');
}
const { text: replaced, fields, caret } = parseSnippetTemplate(replTpl, visualText);
const start = m ? m.from : sel.start;
const end = m ? m.to : sel.end;
let newCaret = start + replaced.length;
if (caret !== null) newCaret = start + caret;
else if (fields.length > 0) newCaret = start + fields[0].start;
_latexSuiteBusy = true;
replaceRangeInEditor(ed, sel, start, end, replaced, newCaret);
setTimeout(() => { _latexSuiteBusy = false; }, 0);
return true;
}
/*************************************************************************
* 自动片段
*************************************************************************/
const autoSnipsByLastChar = new Map(), autoRegexSnips = [];
(function prepareAutoIndex() {
for (const s of SNIPPETS) {
const hasA = (s.options || '').includes('A');
const auto = (s.auto !== undefined) ? !!s.auto : !!hasA;
if (!auto) continue;
if ((s.options || '').includes('r')) autoRegexSnips.push(s);
else if (typeof s.trigger === 'string' && s.trigger.length > 0) {
const last = s.trigger.slice(-1);
if (!autoSnipsByLastChar.has(last)) autoSnipsByLastChar.set(last, []);
autoSnipsByLastChar.get(last).push(s);
}
}
})();
function tryAutoExpand(e) {
if (!enabled) return;
if (_latexSuiteBusy) return;
if (!isCharacterInsertion(e)) return;
const ed = getActiveEditable(); if (!ed) return;
const sel = getTextAndCaret(ed); if (!sel) return;
if (sel.start !== sel.end) return;
const full = sel.text;
const before = full.slice(0, sel.start);
const lastChar = (e && typeof e.data === 'string' && e.data.length === 1) ? e.data : null;
if (lastChar && autoSnipsByLastChar.has(lastChar)) {
for (const snip of autoSnipsByLastChar.get(lastChar)) {
const m = matchSnippet(before, full, sel.start, snip); if (!m) continue;
expandWithSnippet(ed, sel, snip, m); return;
}
}
for (const snip of autoRegexSnips) {
const m = matchSnippet(before, full, sel.start, snip); if (!m) continue;
expandWithSnippet(ed, sel, snip, m); return;
}
}
window.addEventListener('input', tryAutoExpand, true);
/*************************************************************************
* Visual snippets：选区 + 单字符触发
*************************************************************************/
window.addEventListener('keydown', (e) => {
if (!enabled) return;
const ed = getActiveEditable(); if (!ed) return;
const sel = getTextAndCaret(ed); if (!sel) return;
if (sel.start === sel.end) return;
if (e.key && e.key.length === 1 && !e.ctrlKey && !e.metaKey && !e.altKey) {
const visualText = sel.text.slice(sel.start, sel.end);
for (const snip of SNIPPETS) {
const opts = snip.options || '';
if (!opts.includes('v')) continue;
if (opts.includes('r')) continue;
if (snip.trigger !== e.key) continue;
if (!passesModeOptions(opts, sel.text, sel.start)) continue;
e.preventDefault();
expandWithSnippet(ed, sel, snip, null, visualText);
return;
}
}
}, true);
/*************************************************************************
* 环境定位/切换 与 花括号参数跳转
*************************************************************************/
function findEnvAtPos(fullText, pos) {
const beginRe = /\\begin\{([a-zA-Z*]+)\}/g;
let beginMatch, begins = [];
while ((beginMatch = beginRe.exec(fullText))) {
const name = beginMatch[1];
begins.push({
name,
beginNameStart: beginMatch.index + "\\begin{".length,
beginNameEnd: beginMatch.index + "\\begin{".length + name.length,
beginTokenStart: beginMatch.index,
beginTokenEnd: beginMatch.index + beginMatch[0].length
});
}
let cand = null;
for (const b of begins) if (b.beginTokenStart <= pos && (!cand || b.beginTokenStart > cand.beginTokenStart)) cand = b;
if (!cand) return null;
const name = cand.name;
const endRe = new RegExp(String.raw`\\(begin|end)\{(${name.replace('*','\\*')})\}`, 'g');
endRe.lastIndex = cand.beginTokenEnd;
let depth = 1, m, endTokenStart=-1, endNameStart=-1, endNameEnd=-1, endTokenEnd=-1;
while ((m = endRe.exec(fullText))) {
const kind = m[1];
if (kind === 'begin') depth++; else depth--;
if (depth === 0) {
endTokenStart = m.index;
endNameStart = m.index + "\\end{".length;
endNameEnd = endNameStart + name.length;
endTokenEnd = m.index + m[0].length;
break;
}
}
if (depth !== 0) return null;
if (!(cand.beginTokenStart <= pos && pos <= endTokenEnd)) return null;
return { name,
beginNameStart: cand.beginNameStart, beginNameEnd: cand.beginNameEnd,
endNameStart, endNameEnd,
beginTokenStart: cand.beginTokenStart, beginTokenEnd: cand.beginTokenEnd,
endTokenStart, endTokenEnd
};
}
function nextEnvName(current, dir) {
for (const cycle of ENV_CYCLES) {
const idx = cycle.indexOf(current);
if (idx !== -1) {
if (cycle.length <= 1) return current;
const n = (idx + (dir > 0 ? 1 : -1) + cycle.length) % cycle.length;
return cycle[n];
}
}
return current;
}
// 找到以命令为中心的连续 {…} 参数，并返回各参数内部区间
function findBraceArgsNear(fullText, pos) {
let i = pos - 1;
while (i >= 0 && /\s/.test(fullText[i])) i--;
while (i >= 0 && /[a-zA-Z*]/.test(fullText[i])) i--;
if (i < 0 || fullText[i] !== '\\') return null;
const cmdStart = i;
let j = i + 1;
while (j < fullText.length && /[a-zA-Z*]/.test(fullText[j])) j++;
const cmdEnd = j;
const args = [];
let k = j;
while (k < fullText.length) {
while (k < fullText.length && /\s/.test(fullText[k])) k++;
if (fullText[k] !== '{') break;
let depth = 0, a = k, b = k;
while (b < fullText.length) {
if (fullText[b] === '{') depth++;
else if (fullText[b] === '}') { depth--; if (depth === 0) break; }
b++;
}
if (depth !== 0) break;
args.push({ innerStart: a + 1, innerEnd: b });
k = b + 1;
}
if (args.length === 0) return null;
return { cmdStart, cmdEnd, args };
}
// 关键：在参数内部按 Tab，直接跳到“下一个”；已选中某参数时继续跳到下一/上一
function pickArgIndex(args, selStart, selEnd, dir) {
const step = (dir > 0 ? 1 : -1);
const L = args.length;
for (let idx = 0; idx < L; idx++) {
const a = args[idx];
if (selStart === a.innerStart && selEnd === a.innerEnd) {
return (idx + step + L) % L;
}
}
for (let idx = 0; idx < L; idx++) {
const a = args[idx];
if (selStart >= a.innerStart && selStart <= a.innerEnd) {
return (idx + step + L) % L;
}
}
return dir > 0 ? 0 : L - 1;
}
/*************************************************************************
* 键盘：环境切换 / 花括号参数跳转 / matrix 快捷 / Tabout / 非自动片段
*************************************************************************/
function onKeyDown(e) {
const ed = getActiveEditable(); if (!ed) return;
const sel = getTextAndCaret(ed); if (!sel) return;
if (!enabled) return;
// 1) 花括号参数跳转：Tab / Shift+Tab（设置“选区”，让后续输入覆盖选中文本）
if (e.key === 'Tab' && !e.ctrlKey && !e.metaKey && !e.altKey) {
const full = sel.text;
const brace = findBraceArgsNear(full, sel.start);
if (brace && inMath(full, sel.start)) {
e.preventDefault();
const dir = e.shiftKey ? -1 : +1;
const idx = pickArgIndex(brace.args, sel.start, sel.end, dir);
const target = brace.args[idx];
setSelectionInEditor(ed, sel, target.innerStart, target.innerEnd);
return;
}
}
// 2) 环境切换：Tab / Shift+Tab（光标在 begin..end 范围内）
if ((e.key === 'Tab') && !e.ctrlKey && !e.metaKey && !e.altKey) {
const full = sel.text;
if (sel.start === sel.end) {
const env = findEnvAtPos(full, sel.start);
if (env) {
const dir = e.shiftKey ? -1 : +1;
const newName = nextEnvName(env.name, dir);
if (newName !== env.name) {
e.preventDefault();
_latexSuiteBusy = true;
replaceRangeInEditor(ed, sel, env.endNameStart, env.endNameEnd, newName, sel.start);
replaceRangeInEditor(ed, getTextAndCaret(ed), env.beginNameStart, env.beginNameEnd, newName, sel.start);
setTimeout(() => { _latexSuiteBusy = false; }, 0);
return;
}
}
}
}
// 3) Matrix 快捷
if (e.key === 'Tab' || e.key === 'Enter') {
const full = sel.text;
if (inMatrixLikeEnv(full, sel.start)) {
if (e.key === 'Tab' && !e.shiftKey && !e.ctrlKey && !e.metaKey && !e.altKey) {
e.preventDefault();
_latexSuiteBusy = true;
replaceRangeInEditor(ed, sel, sel.start, sel.end, '&', sel.start + 1);
setTimeout(() => { _latexSuiteBusy = false; }, 0);
return;
}
if (e.key === 'Enter' && !e.ctrlKey && !e.metaKey && !e.altKey) {
e.preventDefault();
if (!e.shiftKey) {
const rep = '\\\\\n';
_latexSuiteBusy = true;
replaceRangeInEditor(ed, sel, sel.start, sel.end, rep, sel.start + rep.length);
setTimeout(() => { _latexSuiteBusy = false; }, 0);
return;
} else {
const after = full.slice(sel.end);
const nIdx = after.indexOf('\n');
const jumpPos = (nIdx === -1) ? full.length : (sel.end + nIdx);
setCaretOnly(ed, sel, jumpPos);
e.preventDefault();
return;
}
}
}
}
// 4) Tabout
if (TABOUT_ENABLED && e.key === NON_AUTO_TRIGGER_KEY && !e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
const after = sel.text.slice(sel.end);
if (after.startsWith('$$')) { e.preventDefault(); setCaretOnly(ed, sel, sel.start + 2); return; }
if (after.startsWith('$')) { e.preventDefault(); setCaretOnly(ed, sel, sel.start + 1); return; }
const first = after[0];
if (')]}>|'.includes(first)) { e.preventDefault(); setCaretOnly(ed, sel, sel.start + 1); return; }
}
// 5) 非自动片段（Tab 触发）
if (e.key === NON_AUTO_TRIGGER_KEY && !e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
if (_latexSuiteBusy) return;
if (sel.start !== sel.end) return;
const before = sel.text.slice(0, sel.start);
for (const snip of SNIPPETS) {
const opts = snip.options || '';
const hasA = opts.includes('A');
const auto = (snip.auto !== undefined) ? !!snip.auto : !!hasA;
if (auto) continue;
const m = matchSnippet(before, sel.text, sel.start, snip); if (!m) continue;
e.preventDefault();
expandWithSnippet(ed, sel, snip, m);
return;
}
}
}
window.addEventListener('keydown', onKeyDown, true);
function inMatrixLikeEnv(text, pos) {
const left = text.lastIndexOf('\\begin{', pos);
if (left === -1) return false;
const right = text.indexOf('}', left + 7);
if (right === -1 || right > pos) return false;
const env = text.slice(left + 7, right);
return MATRIX_ENV_NAMES.includes(env);
}
/*************************************************************************
* Auto-fraction（仅字符输入、数学环境，“/”）
*************************************************************************/
window.addEventListener('input', function onSlashAutoFrac(e) {
if (!enabled) return; if (_latexSuiteBusy) return; if (!isCharacterInsertion(e)) return;
const ed = getActiveEditable(); if (!ed) return;
const sel = getTextAndCaret(ed); if (!sel) return;
if (sel.start !== sel.end) return;
const full = sel.text;
const before = full.slice(0, sel.start);
const after = full.slice(sel.end);
if (!before.endsWith('/')) return;
if (!inMath(full, sel.start)) return;
if (inExcludedEnvironment(before, after, EXCLUDED_ENVIRONMENTS)) return;
const leftBound = findNumeratorStart(before.slice(0, -1), BREAKING_CHARS);
const rightBound = findDenominatorEnd(after, BREAKING_CHARS);
const numerator = before.slice(leftBound, -1);
const denominator = after.slice(0, rightBound);
if (!numerator.trim() || !denominator.trim()) return;
const globalStart = leftBound;
const globalEnd = sel.start + rightBound;
const replacement = `${FRACTION_CMD}{${numerator}}{${denominator}}`;
const newCaret = globalStart + FRACTION_CMD.length + 2;
_latexSuiteBusy = true;
replaceRangeInEditor(ed, sel, globalStart, globalEnd, replacement, newCaret);
setTimeout(() => { _latexSuiteBusy = false; }, 0);
}, true);
function isBreakingChar(ch, breakingStr) { return breakingStr.includes(ch); }
function findNumeratorStart(leftText, breakingStr) {
let i = leftText.length - 1, depth = 0;
while (i >= 0) {
const ch = leftText[i];
if (ch === ')' || ch === ']' || ch === '}') depth++;
else if (ch === '(' || ch === '[' || ch === '{') { if (depth === 0) break; depth--; }
if (depth === 0 && (isBreakingChar(ch, breakingStr) || /\s/.test(ch))) break;
i--;
}
return i + 1;
}
function findDenominatorEnd(rightText, breakingStr) {
let i = 0, depth = 0;
while (i < rightText.length) {
const ch = rightText[i];
if (ch === '(' || ch === '[' || ch === '{') depth++;
else if (ch === ')' || ch === ']' || ch === '}') { if (depth === 0) break; depth--; }
if (depth === 0 && (isBreakingChar(ch, breakingStr) || /\s/.test(ch))) break;
i++;
}
return i;
}
function inExcludedEnvironment(before, _after, envs) {
for (const [startTok, _endTok] of envs) {
const idx = before.lastIndexOf(startTok); if (idx === -1) continue;
const segment = before.slice(idx + startTok.length);
let balance = 0;
for (const ch of segment) { if (ch === '{') balance++; else if (ch === '}') balance--; }
if (balance > 0) return true;
}
return false;
}
/*************************************************************************
* Auto-enlarge：右括号时放大（数学环境）
*************************************************************************/
window.addEventListener('input', function onAutoEnlarge(e) {
if (!enabled) return; if (!AUTO_ENLARGE_ENABLED) return;
if (_latexSuiteBusy) return; if (!isCharacterInsertion(e)) return;
const ed = getActiveEditable(); if (!ed) return;
const sel = getTextAndCaret(ed); if (!sel) return;
if (sel.start !== sel.end) return;
const full = sel.text;
const before = full.slice(0, sel.start);
const after = full.slice(sel.end);
const lastCh = before.slice(-1);
if (!')]}'.includes(lastCh)) return;
if (!inMath(full, sel.start)) return;
const matchOpen = (ch) => ch === ')' ? '(' : (ch === ']' ? '[' : '{');
const openCh = matchOpen(lastCh);
const openPos = findMatchingOpen(before.slice(0, -1), openCh, lastCh);
if (openPos === -1) return;
const inner = before.slice(openPos + 1, -1);
if (!AUTO_ENLARGE_TRIGGERS.some(t => inner.includes(t))) return;
const alreadyLeft = before.slice(Math.max(0, openPos - 6), openPos + 1).includes('\\left');
const alreadyRight = after.startsWith('\\right' + lastCh);
if (alreadyLeft || alreadyRight) return;
const openChar = before[openPos];
const closeChar = lastCh;
const enlarged = `\\left${openChar}${inner}\\right${closeChar}`;
const globalStart = openPos;
const globalEnd = sel.start;
const newCaret = globalStart + enlarged.length;
_latexSuiteBusy = true;
replaceRangeInEditor(ed, sel, globalStart, globalEnd, enlarged, newCaret);
setTimeout(() => { _latexSuiteBusy = false; }, 0);
}, true);
function findMatchingOpen(text, openCh, closeCh) {
let depth = 1;
for (let i = text.length - 1; i >= 0; i--) {
const ch = text[i];
if (ch === closeCh) depth++;
else if (ch === openCh) { depth--; if (depth === 0) return i; }
}
return -1;
}
})();
