761 lines
29 KiB
JavaScript
761 lines
29 KiB
JavaScript
import { Channel } from "./channel.js";
|
|
import { Dialog } from "./dialog.js";
|
|
import { Emoji } from "./emoji.js";
|
|
import { Localuser } from "./localuser.js";
|
|
import { Member } from "./member.js";
|
|
class MarkDown {
|
|
txt;
|
|
keep;
|
|
stdsize;
|
|
owner;
|
|
info;
|
|
constructor(text, owner, { keep = false, stdsize = false } = {}) {
|
|
if ((typeof text) === (typeof "")) {
|
|
this.txt = text.split("");
|
|
}
|
|
else {
|
|
this.txt = text;
|
|
}
|
|
if (this.txt === undefined) {
|
|
this.txt = [];
|
|
}
|
|
this.info = owner.info;
|
|
this.keep = keep;
|
|
this.owner = owner;
|
|
this.stdsize = stdsize;
|
|
}
|
|
get localuser() {
|
|
if (this.owner instanceof Localuser) {
|
|
return this.owner;
|
|
}
|
|
else {
|
|
return this.owner.localuser;
|
|
}
|
|
}
|
|
get rawString() {
|
|
return this.txt.join("");
|
|
}
|
|
get textContent() {
|
|
return this.makeHTML().textContent;
|
|
}
|
|
makeHTML({ keep = this.keep, stdsize = this.stdsize } = {}) {
|
|
return this.markdown(this.txt, { keep, stdsize });
|
|
}
|
|
markdown(text, { keep = false, stdsize = false } = {}) {
|
|
let txt;
|
|
if ((typeof text) === (typeof "")) {
|
|
txt = text.split("");
|
|
}
|
|
else {
|
|
txt = text;
|
|
}
|
|
if (txt === undefined) {
|
|
txt = [];
|
|
}
|
|
const span = document.createElement("span");
|
|
let current = document.createElement("span");
|
|
function appendcurrent() {
|
|
if (current.innerHTML !== "") {
|
|
span.append(current);
|
|
current = document.createElement("span");
|
|
}
|
|
}
|
|
for (let i = 0; i < txt.length; i++) {
|
|
if (txt[i] === "\n" || i === 0) {
|
|
const first = i === 0;
|
|
if (first) {
|
|
i--;
|
|
}
|
|
let element = document.createElement("span");
|
|
let keepys = "";
|
|
if (txt[i + 1] === "#") {
|
|
if (txt[i + 2] === "#") {
|
|
if (txt[i + 3] === "#" && txt[i + 4] === " ") {
|
|
element = document.createElement("h3");
|
|
keepys = "### ";
|
|
i += 5;
|
|
}
|
|
else if (txt[i + 3] === " ") {
|
|
element = document.createElement("h2");
|
|
element.classList.add("h2md");
|
|
keepys = "## ";
|
|
i += 4;
|
|
}
|
|
}
|
|
else if (txt[i + 2] === " ") {
|
|
element = document.createElement("h1");
|
|
keepys = "# ";
|
|
i += 3;
|
|
}
|
|
}
|
|
else if (txt[i + 1] === ">" && txt[i + 2] === " ") {
|
|
element = document.createElement("div");
|
|
const line = document.createElement("div");
|
|
line.classList.add("quoteline");
|
|
element.append(line);
|
|
element.classList.add("quote");
|
|
keepys = "> ";
|
|
i += 3;
|
|
}
|
|
if (keepys) {
|
|
appendcurrent();
|
|
if (!first && !stdsize) {
|
|
span.appendChild(document.createElement("br"));
|
|
}
|
|
const build = [];
|
|
for (; txt[i] !== "\n" && txt[i] !== undefined; i++) {
|
|
build.push(txt[i]);
|
|
}
|
|
try {
|
|
if (stdsize) {
|
|
element = document.createElement("span");
|
|
}
|
|
if (keep) {
|
|
element.append(keepys);
|
|
//span.appendChild(document.createElement("br"));
|
|
}
|
|
element.appendChild(this.markdown(build, { keep, stdsize }));
|
|
span.append(element);
|
|
}
|
|
finally {
|
|
i -= 1;
|
|
continue;
|
|
}
|
|
}
|
|
if (first) {
|
|
i++;
|
|
}
|
|
}
|
|
if (txt[i] === "\n") {
|
|
if (!stdsize) {
|
|
appendcurrent();
|
|
span.append(document.createElement("br"));
|
|
}
|
|
continue;
|
|
}
|
|
if (txt[i] === "`") {
|
|
let count = 1;
|
|
if (txt[i + 1] === "`") {
|
|
count++;
|
|
if (txt[i + 2] === "`") {
|
|
count++;
|
|
}
|
|
}
|
|
let build = "";
|
|
if (keep) {
|
|
build += "`".repeat(count);
|
|
}
|
|
let find = 0;
|
|
let j = i + count;
|
|
let init = true;
|
|
for (; txt[j] !== undefined && (txt[j] !== "\n" || count === 3) && find !== count; j++) {
|
|
if (txt[j] === "`") {
|
|
find++;
|
|
}
|
|
else {
|
|
if (find !== 0) {
|
|
build += "`".repeat(find);
|
|
find = 0;
|
|
}
|
|
if (init && count === 3) {
|
|
if (txt[j] === " " || txt[j] === "\n") {
|
|
init = false;
|
|
}
|
|
if (keep) {
|
|
build += txt[j];
|
|
}
|
|
continue;
|
|
}
|
|
build += txt[j];
|
|
}
|
|
}
|
|
if (stdsize) {
|
|
build = build.replaceAll("\n", "");
|
|
}
|
|
if (find === count) {
|
|
appendcurrent();
|
|
i = j;
|
|
if (keep) {
|
|
build += "`".repeat(find);
|
|
}
|
|
if (count !== 3 && !stdsize) {
|
|
const samp = document.createElement("samp");
|
|
samp.textContent = build;
|
|
span.appendChild(samp);
|
|
}
|
|
else {
|
|
const pre = document.createElement("pre");
|
|
if (build.at(-1) === "\n") {
|
|
build = build.substring(0, build.length - 1);
|
|
}
|
|
if (txt[i] === "\n") {
|
|
i++;
|
|
}
|
|
pre.textContent = build;
|
|
span.appendChild(pre);
|
|
}
|
|
i--;
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "*") {
|
|
let count = 1;
|
|
if (txt[i + 1] === "*") {
|
|
count++;
|
|
if (txt[i + 2] === "*") {
|
|
count++;
|
|
}
|
|
}
|
|
let build = [];
|
|
let find = 0;
|
|
let j = i + count;
|
|
for (; txt[j] !== undefined && find !== count; j++) {
|
|
if (txt[j] === "*") {
|
|
find++;
|
|
}
|
|
else {
|
|
build.push(txt[j]);
|
|
if (find !== 0) {
|
|
build = build.concat(new Array(find).fill("*"));
|
|
find = 0;
|
|
}
|
|
}
|
|
}
|
|
if (find === count && (count != 1 || txt[i + 1] !== " ")) {
|
|
appendcurrent();
|
|
i = j;
|
|
const stars = "*".repeat(count);
|
|
if (count === 1) {
|
|
const i = document.createElement("i");
|
|
if (keep) {
|
|
i.append(stars);
|
|
}
|
|
i.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
i.append(stars);
|
|
}
|
|
span.appendChild(i);
|
|
}
|
|
else if (count === 2) {
|
|
const b = document.createElement("b");
|
|
if (keep) {
|
|
b.append(stars);
|
|
}
|
|
b.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
b.append(stars);
|
|
}
|
|
span.appendChild(b);
|
|
}
|
|
else {
|
|
const b = document.createElement("b");
|
|
const i = document.createElement("i");
|
|
if (keep) {
|
|
b.append(stars);
|
|
}
|
|
b.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
b.append(stars);
|
|
}
|
|
i.appendChild(b);
|
|
span.appendChild(i);
|
|
}
|
|
i--;
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "_") {
|
|
let count = 1;
|
|
if (txt[i + 1] === "_") {
|
|
count++;
|
|
if (txt[i + 2] === "_") {
|
|
count++;
|
|
}
|
|
}
|
|
let build = [];
|
|
let find = 0;
|
|
let j = i + count;
|
|
for (; txt[j] !== undefined && find !== count; j++) {
|
|
if (txt[j] === "_") {
|
|
find++;
|
|
}
|
|
else {
|
|
build.push(txt[j]);
|
|
if (find !== 0) {
|
|
build = build.concat(new Array(find).fill("_"));
|
|
find = 0;
|
|
}
|
|
}
|
|
}
|
|
if (find === count && (count != 1 || (txt[j + 1] === " " || txt[j + 1] === "\n" || txt[j + 1] === undefined))) {
|
|
appendcurrent();
|
|
i = j;
|
|
const underscores = "_".repeat(count);
|
|
if (count === 1) {
|
|
const i = document.createElement("i");
|
|
if (keep) {
|
|
i.append(underscores);
|
|
}
|
|
i.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
i.append(underscores);
|
|
}
|
|
span.appendChild(i);
|
|
}
|
|
else if (count === 2) {
|
|
const u = document.createElement("u");
|
|
if (keep) {
|
|
u.append(underscores);
|
|
}
|
|
u.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
u.append(underscores);
|
|
}
|
|
span.appendChild(u);
|
|
}
|
|
else {
|
|
const u = document.createElement("u");
|
|
const i = document.createElement("i");
|
|
if (keep) {
|
|
i.append(underscores);
|
|
}
|
|
i.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
i.append(underscores);
|
|
}
|
|
u.appendChild(i);
|
|
span.appendChild(u);
|
|
}
|
|
i--;
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "~" && txt[i + 1] === "~") {
|
|
const count = 2;
|
|
let build = [];
|
|
let find = 0;
|
|
let j = i + 2;
|
|
for (; txt[j] !== undefined && find !== count; j++) {
|
|
if (txt[j] === "~") {
|
|
find++;
|
|
}
|
|
else {
|
|
build.push(txt[j]);
|
|
if (find !== 0) {
|
|
build = build.concat(new Array(find).fill("~"));
|
|
find = 0;
|
|
}
|
|
}
|
|
}
|
|
if (find === count) {
|
|
appendcurrent();
|
|
i = j - 1;
|
|
const tildes = "~~";
|
|
if (count === 2) {
|
|
const s = document.createElement("s");
|
|
if (keep) {
|
|
s.append(tildes);
|
|
}
|
|
s.appendChild(this.markdown(build, { keep, stdsize }));
|
|
if (keep) {
|
|
s.append(tildes);
|
|
}
|
|
span.appendChild(s);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "|" && txt[i + 1] === "|") {
|
|
const count = 2;
|
|
let build = [];
|
|
let find = 0;
|
|
let j = i + 2;
|
|
for (; txt[j] !== undefined && find !== count; j++) {
|
|
if (txt[j] === "|") {
|
|
find++;
|
|
}
|
|
else {
|
|
build.push(txt[j]);
|
|
if (find !== 0) {
|
|
build = build.concat(new Array(find).fill("~"));
|
|
find = 0;
|
|
}
|
|
}
|
|
}
|
|
if (find === count) {
|
|
appendcurrent();
|
|
i = j - 1;
|
|
const pipes = "||";
|
|
if (count === 2) {
|
|
const j = document.createElement("j");
|
|
if (keep) {
|
|
j.append(pipes);
|
|
}
|
|
j.appendChild(this.markdown(build, { keep, stdsize }));
|
|
j.classList.add("spoiler");
|
|
j.onclick = MarkDown.unspoil;
|
|
if (keep) {
|
|
j.append(pipes);
|
|
}
|
|
span.appendChild(j);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
if ((!keep) && txt[i] === "h" && txt[i + 1] === "t" && txt[i + 2] === "t" && txt[i + 3] === "p") {
|
|
let build = "http";
|
|
let j = i + 4;
|
|
const endchars = new Set(["\\", "<", ">", "|", "]", " "]);
|
|
for (; txt[j] !== undefined; j++) {
|
|
const char = txt[j];
|
|
if (endchars.has(char)) {
|
|
break;
|
|
}
|
|
build += char;
|
|
}
|
|
if (URL.canParse(build)) {
|
|
appendcurrent();
|
|
const a = document.createElement("a");
|
|
//a.href=build;
|
|
MarkDown.safeLink(a, build);
|
|
a.textContent = build;
|
|
a.target = "_blank";
|
|
i = j - 1;
|
|
span.appendChild(a);
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "<" && (txt[i + 1] === "@" || txt[i + 1] === "#")) {
|
|
let id = "";
|
|
let j = i + 2;
|
|
const numbers = new Set(["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]);
|
|
for (; txt[j] !== undefined; j++) {
|
|
const char = txt[j];
|
|
if (!numbers.has(char)) {
|
|
break;
|
|
}
|
|
id += char;
|
|
}
|
|
if (txt[j] === ">") {
|
|
appendcurrent();
|
|
const mention = document.createElement("span");
|
|
mention.classList.add("mentionMD");
|
|
mention.contentEditable = "false";
|
|
const char = txt[i + 1];
|
|
i = j;
|
|
switch (char) {
|
|
case "@":
|
|
const user = this.localuser.userMap.get(id);
|
|
if (user) {
|
|
mention.textContent = `@${user.name}`;
|
|
let guild = null;
|
|
if (this.owner instanceof Channel) {
|
|
guild = this.owner.guild;
|
|
}
|
|
if (!keep) {
|
|
user.bind(mention, guild);
|
|
}
|
|
if (guild) {
|
|
Member.resolveMember(user, guild).then(member => {
|
|
if (member) {
|
|
mention.textContent = `@${member.name}`;
|
|
}
|
|
});
|
|
}
|
|
}
|
|
else {
|
|
mention.textContent = `@unknown`;
|
|
}
|
|
break;
|
|
case "#":
|
|
const channel = this.localuser.channelids.get(id);
|
|
if (channel) {
|
|
mention.textContent = `#${channel.name}`;
|
|
if (!keep) {
|
|
mention.onclick = _ => {
|
|
this.localuser.goToChannel(id);
|
|
};
|
|
}
|
|
}
|
|
else {
|
|
mention.textContent = `#unknown`;
|
|
}
|
|
break;
|
|
}
|
|
span.appendChild(mention);
|
|
mention.setAttribute("real", `<${char}${id}>`);
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "<" && txt[i + 1] === "t" && txt[i + 2] === ":") {
|
|
let found = false;
|
|
const build = ["<", "t", ":"];
|
|
let j = i + 3;
|
|
for (; txt[j] !== void 0; j++) {
|
|
build.push(txt[j]);
|
|
if (txt[j] === ">") {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (found) {
|
|
appendcurrent();
|
|
i = j;
|
|
const parts = build.join("").match(/^<t:([0-9]{1,16})(:([tTdDfFR]))?>$/);
|
|
const dateInput = new Date(Number.parseInt(parts[1]) * 1000);
|
|
let time = "";
|
|
if (Number.isNaN(dateInput.getTime()))
|
|
time = build.join("");
|
|
else {
|
|
if (parts[3] === "d")
|
|
time = dateInput.toLocaleString(void 0, { day: "2-digit", month: "2-digit", year: "numeric" });
|
|
else if (parts[3] === "D")
|
|
time = dateInput.toLocaleString(void 0, { day: "numeric", month: "long", year: "numeric" });
|
|
else if (!parts[3] || parts[3] === "f")
|
|
time = dateInput.toLocaleString(void 0, { day: "numeric", month: "long", year: "numeric" }) + " " +
|
|
dateInput.toLocaleString(void 0, { hour: "2-digit", minute: "2-digit" });
|
|
else if (parts[3] === "F")
|
|
time = dateInput.toLocaleString(void 0, { day: "numeric", month: "long", year: "numeric", weekday: "long" }) + " " +
|
|
dateInput.toLocaleString(void 0, { hour: "2-digit", minute: "2-digit" });
|
|
else if (parts[3] === "t")
|
|
time = dateInput.toLocaleString(void 0, { hour: "2-digit", minute: "2-digit" });
|
|
else if (parts[3] === "T")
|
|
time = dateInput.toLocaleString(void 0, { hour: "2-digit", minute: "2-digit", second: "2-digit" });
|
|
else if (parts[3] === "R")
|
|
time = Math.round((Date.now() - (Number.parseInt(parts[1]) * 1000)) / 1000 / 60) + " minutes ago";
|
|
}
|
|
const timeElem = document.createElement("span");
|
|
timeElem.classList.add("markdown-timestamp");
|
|
timeElem.textContent = time;
|
|
span.appendChild(timeElem);
|
|
continue;
|
|
}
|
|
}
|
|
if (txt[i] === "<" && (txt[i + 1] === ":" || (txt[i + 1] === "a" && txt[i + 2] === ":"))) {
|
|
let found = false;
|
|
const build = txt[i + 1] === "a" ? ["<", "a", ":"] : ["<", ":"];
|
|
let j = i + build.length;
|
|
for (; txt[j] !== void 0; j++) {
|
|
build.push(txt[j]);
|
|
if (txt[j] === ">") {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (found) {
|
|
const buildjoin = build.join("");
|
|
const parts = buildjoin.match(/^<(a)?:\w+:(\d{10,30})>$/);
|
|
if (parts && parts[2]) {
|
|
appendcurrent();
|
|
i = j;
|
|
const isEmojiOnly = txt.join("").trim() === buildjoin.trim();
|
|
const owner = (this.owner instanceof Channel) ? this.owner.guild : this.owner;
|
|
const emoji = new Emoji({ name: buildjoin, id: parts[2], animated: Boolean(parts[1]) }, owner);
|
|
span.appendChild(emoji.getHTML(isEmojiOnly));
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
if (txt[i] == "[" && !keep) {
|
|
let partsFound = 0;
|
|
let j = i + 1;
|
|
const build = ["["];
|
|
for (; txt[j] !== void 0; j++) {
|
|
build.push(txt[j]);
|
|
if (partsFound === 0 && txt[j] === "]") {
|
|
if (txt[j + 1] === "(" &&
|
|
txt[j + 2] === "h" && txt[j + 3] === "t" && txt[j + 4] === "t" && txt[j + 5] === "p" && (txt[j + 6] === "s" || txt[j + 6] === ":")) {
|
|
partsFound++;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
else if (partsFound === 1 && txt[j] === ")") {
|
|
partsFound++;
|
|
break;
|
|
}
|
|
}
|
|
if (partsFound === 2) {
|
|
appendcurrent();
|
|
const parts = build.join("").match(/^\[(.+)\]\((https?:.+?)( ('|").+('|"))?\)$/);
|
|
if (parts) {
|
|
const linkElem = document.createElement("a");
|
|
if (URL.canParse(parts[2])) {
|
|
i = j;
|
|
MarkDown.safeLink(linkElem, parts[2]);
|
|
linkElem.textContent = parts[1];
|
|
linkElem.target = "_blank";
|
|
linkElem.rel = "noopener noreferrer";
|
|
linkElem.title = (parts[3] ? parts[3].substring(2, parts[3].length - 1) + "\n\n" : "") + parts[2];
|
|
span.appendChild(linkElem);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
current.textContent += txt[i];
|
|
}
|
|
appendcurrent();
|
|
return span;
|
|
}
|
|
static unspoil(e) {
|
|
e.target.classList.remove("spoiler");
|
|
e.target.classList.add("unspoiled");
|
|
}
|
|
giveBox(box) {
|
|
box.onkeydown = _ => {
|
|
//console.log(_);
|
|
};
|
|
let prevcontent = "";
|
|
box.onkeyup = _ => {
|
|
const content = MarkDown.gatherBoxText(box);
|
|
if (content !== prevcontent) {
|
|
prevcontent = content;
|
|
this.txt = content.split("");
|
|
this.boxupdate(box);
|
|
}
|
|
};
|
|
box.onpaste = _ => {
|
|
if (!_.clipboardData)
|
|
return;
|
|
console.log(_.clipboardData.types);
|
|
const data = _.clipboardData.getData("text");
|
|
document.execCommand("insertHTML", false, data);
|
|
_.preventDefault();
|
|
if (!box.onkeyup)
|
|
return;
|
|
box.onkeyup(new KeyboardEvent("_"));
|
|
};
|
|
}
|
|
boxupdate(box) {
|
|
const restore = saveCaretPosition(box);
|
|
box.innerHTML = "";
|
|
box.append(this.makeHTML({ keep: true }));
|
|
if (restore) {
|
|
restore();
|
|
}
|
|
}
|
|
static gatherBoxText(element) {
|
|
if (element.tagName.toLowerCase() === "img") {
|
|
return element.alt;
|
|
}
|
|
if (element.tagName.toLowerCase() === "br") {
|
|
return "\n";
|
|
}
|
|
if (element.hasAttribute("real")) {
|
|
return element.getAttribute("real");
|
|
}
|
|
let build = "";
|
|
for (const thing of element.childNodes) {
|
|
if (thing instanceof Text) {
|
|
const text = thing.textContent;
|
|
build += text;
|
|
continue;
|
|
}
|
|
const text = this.gatherBoxText(thing);
|
|
if (text) {
|
|
build += text;
|
|
}
|
|
}
|
|
return build;
|
|
}
|
|
static trustedDomains = new Set([location.host]);
|
|
static safeLink(elm, url) {
|
|
if (URL.canParse(url)) {
|
|
const Url = new URL(url);
|
|
if (elm instanceof HTMLAnchorElement && this.trustedDomains.has(Url.host)) {
|
|
elm.href = url;
|
|
elm.target = "_blank";
|
|
return;
|
|
}
|
|
elm.onmouseup = _ => {
|
|
if (_.button === 2)
|
|
return;
|
|
console.log(":3");
|
|
function open() {
|
|
const proxy = window.open(url, '_blank');
|
|
if (proxy && _.button === 1) {
|
|
proxy.focus();
|
|
}
|
|
else if (proxy) {
|
|
window.focus();
|
|
}
|
|
}
|
|
if (this.trustedDomains.has(Url.host)) {
|
|
open();
|
|
}
|
|
else {
|
|
const full = new Dialog([
|
|
"vdiv",
|
|
["title", "You're leaving spacebar"],
|
|
["text", "You're going to " + Url.host + " are you sure you want to go there?"],
|
|
["hdiv",
|
|
["button", "", "Nevermind", _ => full.hide()],
|
|
["button", "", "Go there", _ => { open(); full.hide(); }],
|
|
["button", "", "Go there and trust in the future", _ => {
|
|
open();
|
|
full.hide();
|
|
this.trustedDomains.add(Url.host);
|
|
}]
|
|
]
|
|
]);
|
|
full.show();
|
|
}
|
|
};
|
|
}
|
|
else {
|
|
throw Error(url + " is not a valid URL");
|
|
}
|
|
}
|
|
static replace(base, newelm) {
|
|
const basechildren = base.children;
|
|
const newchildren = newelm.children;
|
|
for (const thing of newchildren) {
|
|
}
|
|
}
|
|
}
|
|
//solution from https://stackoverflow.com/questions/4576694/saving-and-restoring-caret-position-for-contenteditable-div
|
|
let text = "";
|
|
function saveCaretPosition(context) {
|
|
const selection = window.getSelection();
|
|
if (!selection)
|
|
return;
|
|
const range = selection.getRangeAt(0);
|
|
range.setStart(context, 0);
|
|
text = selection.toString();
|
|
let len = text.length + 1;
|
|
for (const str in text.split("\n")) {
|
|
if (str.length !== 0) {
|
|
len--;
|
|
}
|
|
}
|
|
len += +(text[text.length - 1] === "\n");
|
|
return function restore() {
|
|
if (!selection)
|
|
return;
|
|
const pos = getTextNodeAtPosition(context, len);
|
|
selection.removeAllRanges();
|
|
const range = new Range();
|
|
range.setStart(pos.node, pos.position);
|
|
selection.addRange(range);
|
|
};
|
|
}
|
|
function getTextNodeAtPosition(root, index) {
|
|
const NODE_TYPE = NodeFilter.SHOW_TEXT;
|
|
const treeWalker = document.createTreeWalker(root, NODE_TYPE, elem => {
|
|
if (!elem.textContent)
|
|
return 0;
|
|
if (index > elem.textContent.length) {
|
|
index -= elem.textContent.length;
|
|
return NodeFilter.FILTER_REJECT;
|
|
}
|
|
return NodeFilter.FILTER_ACCEPT;
|
|
});
|
|
const c = treeWalker.nextNode();
|
|
return {
|
|
node: c ? c : root,
|
|
position: index
|
|
};
|
|
}
|
|
export { MarkDown };
|