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/* eslint max-lines: ["error", 400] */
// @ts-check
import Vue from "vue";
import CodeMirror from "codemirror";
import "codemirror/addon/edit/continuelist";
import "./CodeMirrorAutoIndentAddon";
/* eslint-disable-next-line @typescript-eslint/no-unused-vars */ // @ts-ignore
import PugMod from "codemirror/mode/pug/pug.js"; // jshint ignore:line
/* eslint-disable-next-line @typescript-eslint/no-unused-vars */ // @ts-ignore
import MarkdownMod from "codemirror/mode/markdown/markdown"; // jshint ignore:line
import { BaseStoreMixin } from "../store/utils";
import BaseResizeObserverMixin from "../mixins/BaseResizeObserverMixin";
import { assign, bindAll, clone, cloneDeep, first,
includes, isEmpty, set, split, throttle } from "lodash";
const managedModes = [ "pug", "markdown", "javascript" ];
const managedEvents = [
"scroll", "changes", "beforeChange", "cursorActivity",
"keyHandled", "inputRead", "electricInput", "beforeSelectionChange",
"viewportChange", "swapDoc", "gutterClick", "gutterContextMenu",
"focus", "blur", "refresh", "optionChange", "scrollCursorIntoView",
"update"
];
/**
* @typedef {{ textarea: HTMLTextAreaElement }} Refs
*/
const component = /** @type {V.Constructor<any, Refs>} */ (Vue).extend({
name: "CodeMirrorEditor",
mixins: [ BaseResizeObserverMixin, BaseStoreMixin ],
props: {
value: { type: String, default: "" },
name: { type: String, default: "codemirror" },
maxLength: { type: Number, default: -1 },
placeholder: { type: String, default: "" },
markdownTools: { type: Boolean, default: true },
options: { type: Object, default: () => ({}) },
events: { type: Array, default: () => ([]) },
managedModes: { type: Array, default: () => managedModes }
},
/**
* @return {{
* content: string,
* codemirror: CodeMirror.EditorFromTextArea | null
* cminstance: CodeMirror.EditorFromTextArea | null
* cmOptions: CodeMirror.EditorConfiguration
* }}
*/
data() {
return {
content: "", codemirror: null, cminstance: null,
cmOptions: { mode: "markdown" } // Default mode
};
},
computed: {
/**
* @returns {boolean}
*/
showMarkdownTools() {
return this.cmOptions.mode === "markdown" && this.markdownTools;
},
/**
* @return {boolean}
*/
darkMode() { return this.getBaseState([ "ui", "darkMode" ]); },
/**
* @returns {number}
*/
valueLength() {
return this.cminstance?.getValue().length ?? 0;
}
},
watch: {
options: {
deep: true,
/**
* @param {any} options
*/
handler(options) {
// eslint-disable-next-line guard-for-in
for (const key in options) {
set(this.cmOptions, key, options[key]);
// @ts-ignore key is well formed
Eif (this.cminstance) { this.cminstance.setOption(key, options[key]); }
}
}
},
/**
* @param {string} newVal
*/
value(newVal) {
this.handlerCodeChange(newVal);
},
darkMode: function(mode) {
if (this.codemirror) {
this.codemirror.setOption("theme", mode ? "material-darker" : "default");
}
}
},
mounted() {
this.initialize();
bindAll(this, [ "bold", "italic", "list", "link", "undo", "redo" ]);
this.onResize = throttle(this.onResize, 250 /* ms */);
},
beforeDestroy() {
Eif (this.cminstance) { this.cminstance.toTextArea(); }
},
methods: {
/**
* @param {number} width
* @param {number} height
*/
onResize(width, height) { // start auto-refresh
if (width > 0 && height > 0) {
// @ts-ignore
const display = this.cminstance?.display;
// eslint-disable-next-line eqeqeq
Eif (display.lastWrapHeight == display.wrapper.clientHeight) {
return;
}
this.refresh();
}
},
/**
* @brief CodeMirror Management
*/
initialize() {
// Only markdown or pug mode at the moment. Default is markdown
/** @type CodeMirror.EditorConfiguration */
const cmOptions = assign(this.cmOptions, this.options);
// If markdown mode, add extrakeys and addons
Eif (cmOptions.mode === "markdown") {
assign(cmOptions, {
extraKeys: {
"Ctrl-B": this.bold, "Cmd-B": this.bold,
"Ctrl-I": this.italic, "Cmd-I": this.italic,
"Ctrl-L": this.list, "Cmd-L": this.list,
"Ctrl-K": this.link, "Cmd-K": this.link,
"Ctrl-Z": this.undo, "Cmd-Z": this.undo,
"Shift-Ctrl-Z": this.redo, "Shift-Cmd-Z": this.redo,
Enter: "newlineAndIndentContinueMarkdownList",
Tab: "autoIndentMarkdownList",
"Shift-Tab": "autoUnindentMarkdownList" }
});
}
Iif (!includes(this.managedModes, cmOptions.mode)) {
this.$refs.textarea.innerHTML = `Mode ${cmOptions.mode} not supported...`;
return;
}
cmOptions.theme = this.darkMode ? "material-darker" : "default";
this.codemirror = CodeMirror.fromTextArea(this.$refs.textarea, cmOptions);
this.cminstance = this.codemirror;
this.cmOptions = cmOptions;
this.cminstance.setValue(this.value || this.content);
this.cminstance.on("beforeChange", this.enforceMaxLength);
this.cminstance.on("change", (/** @type CodeMirror.Editor */cm) => {
this.content = cm.getValue();
Eif (this.$emit) {
this.$emit("input", this.content);
}
});
/** @type any */
const tmpEvents = {};
clone(managedEvents)
// @ts-ignore
.concat(this.events)
.filter((/** @type string */ e) => (!tmpEvents[e] && (tmpEvents[e] = true)))
.forEach((event) => {
Iif (!this.cminstance) { return; }
// @ts-ignore event is inside managedEvents
this.cminstance.on(event, (/** @type any[] */...args) => {
this.$emit(event, ...args);
});
});
this.$emit("ready", this.codemirror);
// prevents funky dynamic rendering
this.refresh();
},
refresh() {
this.$nextTick(() => {
Iif (!this.cminstance) { return; }
this.cminstance.refresh();
});
},
focus() {
Iif (!this.cminstance) { return; }
this.cminstance.focus();
},
/**
* @returns { CodeMirror.Editor | null }
*/
get() {
return this.cminstance;
},
/**
* @param {CodeMirror.Editor} cm
* @param {any} change
*/
enforceMaxLength(cm, change) {
if (this.maxLength > 0 && change.update) {
const separator = cm.getDoc().lineSeparator();
var str = change.text.join(separator);
var delta = str.length -
(cm.indexFromPos(change.to) - cm.indexFromPos(change.from));
Iif (delta <= 0) { return true; }
delta = cm.getValue().length + delta - this.maxLength;
if (delta > 0) {
str = str.substr(0, str.length - delta);
change.update(change.from, change.to, str.split(separator));
}
}
return undefined;
},
/**
* @param {string} newVal
*/
handlerCodeChange(newVal) {
Iif (!this.cminstance) { return; }
const cmValue = this.cminstance.getValue();
if (newVal !== cmValue) {
/** @type CodeMirror.ScrollInfo */
const scrollInfo = this.cminstance.getScrollInfo();
this.cminstance.setValue(newVal);
this.content = newVal;
this.cminstance.scrollTo(scrollInfo.left, scrollInfo.top);
}
},
getForwardSelection() {
Iif (!this.cminstance) { return null; }
const range = cloneDeep(first(this.cminstance.listSelections()));
Iif (!range) { return null; }
Iif (range.anchor.line > range.head.line ||
(range.anchor.line === range.head.line &&
range.anchor.ch > range.head.ch)) {
const tmp = range.head;
range.head = range.anchor;
range.anchor = tmp;
}
return range;
},
/**
* @brief Toolbar for Markdown mode
*/
heading() {
Iif (!this.cminstance) { return; }
const withSpace = this.cminstance.getSelection() ===
this.cminstance.getLine(this.cminstance.getCursor().line);
this.makeListWith("#", withSpace);
},
bold() {
this.wrapSelectionWith("**");
},
italic() {
this.wrapSelectionWith("_");
},
strikethrough() {
this.wrapSelectionWith("~~");
},
quote() {
this.makeListWith(">");
},
code() {
Iif (!this.cminstance) { return; }
const selected = this.cminstance.getSelection();
const nLines = split(selected, "\n").length;
if (nLines <= 1) {
this.wrapSelectionWith("`");
}
else {
const range = this.getForwardSelection();
Iif (!range) { return; }
const elStart = range.anchor.ch === 0 ? "```\n" : "\n```\n";
const lastLine = clone(this.cminstance.getLine(range.head.line));
const elEnd = range.head.ch === lastLine.length ? "\n```" : "\n```\n";
this.wrapSelectionWith(elStart, elEnd);
}
},
link() {
Iif (!this.cminstance) { return; }
const initialCursor = clone(this.cminstance.getCursor("to"));
const selected = this.cminstance.getSelection(); // It may be empty
// Advance and set the cursor at the beginning of "url" text
const startCursor = {
ch: initialCursor.ch + 3 /* for []( */,
line: initialCursor.line
};
const endCursor = {
ch: startCursor.ch + 3, // "url"
line: startCursor.line
};
this.cminstance.replaceSelection(`[${selected}](url)`);
this.cminstance.focus();
this.cminstance.setSelection(startCursor, endCursor);
},
list() {
this.makeListWith("-");
},
taskList() {
this.makeListWith("- [ ]");
},
table() {
Iif (!this.cminstance) { return; }
const tableStr =
"\n| header | header |\n" +
"| ------ | ------ |\n" +
"| cell | cell |\n" +
"| cell | cell |\n";
const cursor = this.cminstance.getCursor();
this.cminstance.replaceRange(tableStr, cursor, cursor);
},
numberedList() {
Iif (!this.cminstance) { return; }
if (!this.cminstance.somethingSelected()) {
this.makeListWith("1.");
return;
}
const selected = this.cminstance.getSelection();
const lines = split(selected, "\n");
let listed = "";
let number = 1;
for (const line of lines) {
Iif (isEmpty(line)) { continue; }
listed += `${number++}. ${line}\n`;
}
this.cminstance.replaceSelection(`${listed}`);
},
indent() {
Iif (!this.cminstance) { return; }
this.indentLines("add");
this.cminstance.focus();
},
outdent() {
Iif (!this.cminstance) { return; }
this.indentLines("subtract");
this.cminstance.focus();
},
/**
* @param {"add" | "subtract" } mode
*/
indentLines(mode) {
Iif (!this.cminstance) { return; }
Iif (mode !== "add" && mode !== "subtract") { return; }
const range = this.getForwardSelection();
Iif (!range) { return; }
for (let line = range.anchor.line; line <= range.head.line; line++) {
this.cminstance.indentLine(line, mode);
}
},
undo() {
Iif (!this.cminstance) { return; }
this.cminstance.undo();
},
redo() {
Iif (!this.cminstance) { return; }
this.cminstance.redo();
},
/**
* @param {string} elementStart
* @param {string?=} elementEnd
*/
wrapSelectionWith(elementStart, elementEnd = undefined) {
Iif (!this.cminstance) { return; }
if (!elementEnd) {
elementEnd = elementStart;
}
if (!this.cminstance.somethingSelected()) {
// Add element start and end and move cursor in the middle
const initialCursor = this.cminstance.getCursor();
this.cminstance.replaceSelection(`${elementStart}${elementEnd}`);
// Advance and set the cursor
initialCursor.ch += elementStart.length;
this.cminstance.setCursor(initialCursor);
}
else {
const selection = first(this.cminstance.listSelections());
const selected = this.cminstance.getSelection();
Iif (!selection) { return; }
this.cminstance.replaceRange(`${elementStart}${selected}${elementEnd}`,
selection.anchor, selection.head, selected);
}
this.cminstance.focus();
},
/**
* @param {string} elementList
* @param {boolean} withSpace
*/
makeListWith(elementList, withSpace = true) {
Iif (!this.cminstance) { return; }
if (!this.cminstance.somethingSelected()) {
// Add element list and move cursor at the end
const initialCursor = this.cminstance.getCursor();
const line = this.cminstance.getLine(initialCursor.line);
this.cminstance.replaceRange(`${elementList}${withSpace ? " " : ""}${line}`,
{ line: initialCursor.line, ch: 0 },
// @ts-ignore: ch is set to last position automatically
{ line: initialCursor.line }, line); // This replace the whole line
// Advance and set the cursor
initialCursor.ch += elementList.length + 1;
this.cminstance.setCursor(initialCursor);
}
else {
const selected = this.cminstance.getSelection();
const lines = split(selected, "\n");
let listed = "";
for (const line of lines) {
Iif (isEmpty(line)) { continue; }
listed += `${elementList}${withSpace ? " " : ""}${line}\n`;
}
this.cminstance.replaceSelection(`${listed}`);
}
this.cminstance.focus();
}
}
});
export default component;
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