334 lines
9.4 KiB
JavaScript
334 lines
9.4 KiB
JavaScript
/* global $ */// dom.js
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/* global CodeMirror */
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/* global editor */
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/* global prefs */
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/* global rerouteHotkeys */// util.js
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'use strict';
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/*
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All cm instances created by this module are collected so we can broadcast prefs
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settings to them. You should `cmFactory.destroy(cm)` to unregister the listener
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when the instance is not used anymore.
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*/
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(() => {
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//#region Factory
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const cms = new Set();
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let lazyOpt;
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const cmFactory = window.cmFactory = {
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create(place, options) {
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const cm = CodeMirror(place, options);
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cm.lastActive = 0;
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cms.add(cm);
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return cm;
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},
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destroy(cm) {
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cms.delete(cm);
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},
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globalSetOption(key, value) {
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CodeMirror.defaults[key] = value;
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if (cms.size > 4 && lazyOpt && lazyOpt.names.includes(key)) {
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lazyOpt.set(key, value);
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} else {
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cms.forEach(cm => cm.setOption(key, value));
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}
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},
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};
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// focus and blur
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const onCmFocus = cm => {
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rerouteHotkeys.toggle(false);
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cm.display.wrapper.classList.add('CodeMirror-active');
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cm.lastActive = Date.now();
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};
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const onCmBlur = cm => {
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rerouteHotkeys.toggle(true);
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setTimeout(() => {
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const {wrapper} = cm.display;
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wrapper.classList.toggle('CodeMirror-active', wrapper.contains(document.activeElement));
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});
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};
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CodeMirror.defineInitHook(cm => {
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cm.on('focus', onCmFocus);
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cm.on('blur', onCmBlur);
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});
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// propagated preferences
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const prefToCmOpt = k =>
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k.startsWith('editor.') &&
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k.slice('editor.'.length);
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const prefKeys = prefs.knownKeys.filter(k =>
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k !== 'editor.colorpicker' && // handled in colorpicker-helper.js
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prefToCmOpt(k) in CodeMirror.defaults);
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const {insertTab, insertSoftTab} = CodeMirror.commands;
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for (const [key, fn] of Object.entries({
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'editor.tabSize'(cm, value) {
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cm.setOption('indentUnit', Number(value));
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},
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'editor.indentWithTabs'(cm, value) {
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CodeMirror.commands.insertTab = value ? insertTab : insertSoftTab;
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},
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'editor.matchHighlight'(cm, value) {
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const showToken = value === 'token' && /[#.\-\w]/;
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const opt = (showToken || value === 'selection') && {
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showToken,
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annotateScrollbar: true,
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onUpdate: updateMatchHighlightCount,
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};
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cm.setOption('highlightSelectionMatches', opt || null);
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},
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'editor.selectByTokens'(cm, value) {
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cm.setOption('configureMouse', value ? configureMouseFn : null);
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},
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})) {
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CodeMirror.defineOption(prefToCmOpt(key), prefs.get(key), fn);
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prefKeys.push(key);
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}
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prefs.subscribe(prefKeys, (key, val) => {
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const name = prefToCmOpt(key);
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if (name === 'theme') {
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loadCmTheme(val);
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} else {
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cmFactory.globalSetOption(name, val);
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}
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});
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// lazy propagation
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lazyOpt = window.IntersectionObserver && {
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names: ['theme', 'lineWrapping'],
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set(key, value) {
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const {observer, queue} = lazyOpt;
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for (const cm of cms) {
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let opts = queue.get(cm);
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if (!opts) queue.set(cm, opts = {});
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opts[key] = value;
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observer.observe(cm.display.wrapper);
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}
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},
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setNow({cm, data}) {
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cm.operation(() => data.forEach(kv => cm.setOption(...kv)));
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},
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onView(entries) {
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const {queue, observer} = lazyOpt;
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const delayed = [];
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for (const e of entries) {
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const r = e.isIntersecting && e.intersectionRect;
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if (!r) continue;
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const cm = e.target.CodeMirror;
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const data = Object.entries(queue.get(cm) || {});
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queue.delete(cm);
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observer.unobserve(e.target);
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if (!data.every(([key, val]) => cm.getOption(key) === val)) {
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if (r.bottom > 0 && r.top < window.innerHeight) {
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lazyOpt.setNow({cm, data});
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} else {
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delayed.push({cm, data});
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}
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}
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}
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if (delayed.length) {
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setTimeout(() => delayed.forEach(lazyOpt.setNow));
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}
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},
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get observer() {
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if (!lazyOpt._observer) {
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// must exceed refreshOnView's 100%
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lazyOpt._observer = new IntersectionObserver(lazyOpt.onView, {rootMargin: '150%'});
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lazyOpt.queue = new WeakMap();
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}
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return lazyOpt._observer;
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},
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};
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//#endregion
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//#region Commands
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Object.assign(CodeMirror.commands, {
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commentSelection(cm) {
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cm.blockComment(cm.getCursor('from'), cm.getCursor('to'), {fullLines: false});
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},
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toggleEditorFocus(cm) {
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if (!cm) return;
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if (cm.hasFocus()) {
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setTimeout(() => cm.display.input.blur());
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} else {
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cm.focus();
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}
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},
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});
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for (const cmd of [
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'nextEditor',
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'prevEditor',
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'save',
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'toggleStyle',
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]) {
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CodeMirror.commands[cmd] = (...args) => editor[cmd](...args);
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}
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//#endregion
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//#region CM option handlers
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async function loadCmTheme(name) {
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let el2;
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const el = $('#cm-theme');
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if (name === 'default') {
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el.href = '';
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} else {
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const path = `/vendor/codemirror/theme/${name}.css`;
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if (el.href !== location.origin + path) {
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// avoid flicker: wait for the second stylesheet to load, then apply the theme
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el2 = await require([path]);
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}
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}
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cmFactory.globalSetOption('theme', name);
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if (el2) {
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el.remove();
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el2.id = el.id;
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}
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}
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function updateMatchHighlightCount(cm, state) {
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cm.display.wrapper.dataset.matchHighlightCount = state.matchesonscroll.matches.length;
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}
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function configureMouseFn(cm, repeat) {
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return repeat === 'double' ?
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{unit: selectTokenOnDoubleclick} :
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{};
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}
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function selectTokenOnDoubleclick(cm, pos) {
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let {ch} = pos;
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const {line, sticky} = pos;
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const {text, styles} = cm.getLineHandle(line);
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const execAt = (rx, i) => (rx.lastIndex = i) && null || rx.exec(text);
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const at = (rx, i) => (rx.lastIndex = i) && null || rx.test(text);
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const atWord = ch => at(/\w/y, ch);
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const atSpace = ch => at(/\s/y, ch);
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const atTokenEnd = styles.indexOf(ch, 1);
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ch += atTokenEnd < 0 ? 0 : sticky === 'before' && atWord(ch - 1) ? 0 : atSpace(ch + 1) ? 0 : 1;
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ch = Math.min(text.length, ch);
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const type = cm.getTokenTypeAt({line, ch: ch + (sticky === 'after' ? 1 : 0)});
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if (atTokenEnd > 0) ch--;
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const isCss = type && !/^(comment|string)/.test(type);
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const isNumber = type === 'number';
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const isSpace = atSpace(ch);
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let wordChars =
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isNumber ? /[-+\w.%]/y :
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isCss ? /[-\w@]/y :
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isSpace ? /\s/y :
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atWord(ch) ? /\w/y : /[^\w\s]/y;
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let a = ch;
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while (a && at(wordChars, a)) a--;
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a += !a && at(wordChars, a) || isCss && at(/[.!#@]/y, a) ? 0 : at(wordChars, a + 1);
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let b, found;
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if (isNumber) {
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b = a + execAt(/[+-]?[\d.]+(e\d+)?|$/yi, a)[0].length;
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found = b >= ch;
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if (!found) {
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a = b;
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ch = a;
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}
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}
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if (!found) {
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wordChars = isCss ? /[-\w]*/y : new RegExp(wordChars.source + '*', 'uy');
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b = ch + execAt(wordChars, ch)[0].length;
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}
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return {
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from: {line, ch: a},
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to: {line, ch: b},
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};
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}
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//#endregion
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//#region Bookmarks
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const BM_CLS = 'gutter-bookmark';
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const BM_BRAND = 'sublimeBookmark';
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const BM_CLICKER = 'CodeMirror-linenumbers';
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const BM_DATA = Symbol('data');
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// TODO: revisit when https://github.com/codemirror/CodeMirror/issues/6716 is fixed
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const tmProto = CodeMirror.TextMarker.prototype;
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const tmProtoOvr = {};
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for (const k of ['clear', 'attachLine', 'detachLine']) {
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tmProtoOvr[k] = function (line) {
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const {cm} = this.doc;
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const withOp = !cm.curOp;
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if (withOp) cm.startOperation();
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tmProto[k].apply(this, arguments);
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cm.curOp.ownsGroup.delayedCallbacks.push(toggleMark.bind(this, this.lines[0], line));
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if (withOp) cm.endOperation();
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};
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}
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for (const name of ['prevBookmark', 'nextBookmark']) {
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const cmdFn = CodeMirror.commands[name];
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CodeMirror.commands[name] = cm => {
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cm.setSelection = cm.jumpToPos;
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cmdFn(cm);
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delete cm.setSelection;
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};
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}
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CodeMirror.defineInitHook(cm => {
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cm.on('gutterClick', onGutterClick);
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cm.on('gutterContextMenu', onGutterContextMenu);
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cm.on('markerAdded', onMarkAdded);
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});
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// TODO: reimplement bookmarking so next/prev order is decided solely by the line numbers
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function onGutterClick(cm, line, name, e) {
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switch (name === BM_CLICKER && e.button) {
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case 0: {
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// main button: toggle
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const [mark] = cm.findMarks({line, ch: 0}, {line, ch: 1e9}, m => m[BM_BRAND]);
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cm.setCursor(mark ? mark.find(-1) : {line, ch: 0});
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cm.execCommand('toggleBookmark');
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break;
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}
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case 1:
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// middle button: select all marks
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cm.execCommand('selectBookmarks');
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break;
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}
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}
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function onGutterContextMenu(cm, line, name, e) {
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if (name === BM_CLICKER) {
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cm.execCommand(e.ctrlKey ? 'prevBookmark' : 'nextBookmark');
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e.preventDefault();
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}
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}
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function onMarkAdded(cm, mark) {
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if (mark[BM_BRAND]) {
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// CM bug workaround to keep the mark at line start when the above line is removed
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mark.inclusiveRight = true;
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Object.assign(mark, tmProtoOvr);
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toggleMark.call(mark, true, mark[BM_DATA] = mark.lines[0]);
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}
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}
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function toggleMark(state, line = this[BM_DATA]) {
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this.doc[state ? 'addLineClass' : 'removeLineClass'](line, 'gutter', BM_CLS);
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if (state) {
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const bms = this.doc.cm.state.sublimeBookmarks;
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if (!bms.includes(this)) bms.push(this);
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}
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}
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//#endregion
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})();
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