Mercurial
diff .cms/lib/codemirror/addon/edit/matchbrackets.js @ 0:78edf6b517a0 draft
24.10
author | Coffee CMS <info@coffee-cms.ru> |
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date | Fri, 11 Oct 2024 22:40:23 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/addon/edit/matchbrackets.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,160 @@ +// CodeMirror, copyright (c) by Marijn Haverbeke and others +// Distributed under an MIT license: https://codemirror.net/5/LICENSE + +(function(mod) { + if (typeof exports == "object" && typeof module == "object") // CommonJS + mod(require("../../lib/codemirror")); + else if (typeof define == "function" && define.amd) // AMD + define(["../../lib/codemirror"], mod); + else // Plain browser env + mod(CodeMirror); +})(function(CodeMirror) { + var ie_lt8 = /MSIE \d/.test(navigator.userAgent) && + (document.documentMode == null || document.documentMode < 8); + + var Pos = CodeMirror.Pos; + + var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<", "<": ">>", ">": "<<"}; + + function bracketRegex(config) { + return config && config.bracketRegex || /[(){}[\]]/ + } + + function findMatchingBracket(cm, where, config) { + var line = cm.getLineHandle(where.line), pos = where.ch - 1; + var afterCursor = config && config.afterCursor + if (afterCursor == null) + afterCursor = /(^| )cm-fat-cursor($| )/.test(cm.getWrapperElement().className) + var re = bracketRegex(config) + + // A cursor is defined as between two characters, but in vim command mode + // (i.e. not insert mode), the cursor is visually represented as a + // highlighted box on top of the 2nd character. Otherwise, we allow matches + // from before or after the cursor. + var match = (!afterCursor && pos >= 0 && re.test(line.text.charAt(pos)) && matching[line.text.charAt(pos)]) || + re.test(line.text.charAt(pos + 1)) && matching[line.text.charAt(++pos)]; + if (!match) return null; + var dir = match.charAt(1) == ">" ? 1 : -1; + if (config && config.strict && (dir > 0) != (pos == where.ch)) return null; + var style = cm.getTokenTypeAt(Pos(where.line, pos + 1)); + + var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style, config); + if (found == null) return null; + return {from: Pos(where.line, pos), to: found && found.pos, + match: found && found.ch == match.charAt(0), forward: dir > 0}; + } + + // bracketRegex is used to specify which type of bracket to scan + // should be a regexp, e.g. /[[\]]/ + // + // Note: If "where" is on an open bracket, then this bracket is ignored. + // + // Returns false when no bracket was found, null when it reached + // maxScanLines and gave up + function scanForBracket(cm, where, dir, style, config) { + var maxScanLen = (config && config.maxScanLineLength) || 10000; + var maxScanLines = (config && config.maxScanLines) || 1000; + + var stack = []; + var re = bracketRegex(config) + var lineEnd = dir > 0 ? Math.min(where.line + maxScanLines, cm.lastLine() + 1) + : Math.max(cm.firstLine() - 1, where.line - maxScanLines); + for (var lineNo = where.line; lineNo != lineEnd; lineNo += dir) { + var line = cm.getLine(lineNo); + if (!line) continue; + var pos = dir > 0 ? 0 : line.length - 1, end = dir > 0 ? line.length : -1; + if (line.length > maxScanLen) continue; + if (lineNo == where.line) pos = where.ch - (dir < 0 ? 1 : 0); + for (; pos != end; pos += dir) { + var ch = line.charAt(pos); + if (re.test(ch) && (style === undefined || + (cm.getTokenTypeAt(Pos(lineNo, pos + 1)) || "") == (style || ""))) { + var match = matching[ch]; + if (match && (match.charAt(1) == ">") == (dir > 0)) stack.push(ch); + else if (!stack.length) return {pos: Pos(lineNo, pos), ch: ch}; + else stack.pop(); + } + } + } + return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null; + } + + function matchBrackets(cm, autoclear, config) { + // Disable brace matching in long lines, since it'll cause hugely slow updates + var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000, + highlightNonMatching = config && config.highlightNonMatching; + var marks = [], ranges = cm.listSelections(); + for (var i = 0; i < ranges.length; i++) { + var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, config); + if (match && (match.match || highlightNonMatching !== false) && cm.getLine(match.from.line).length <= maxHighlightLen) { + var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket"; + marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style})); + if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen) + marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style})); + } + } + + if (marks.length) { + // Kludge to work around the IE bug from issue #1193, where text + // input stops going to the textarea whenever this fires. + if (ie_lt8 && cm.state.focused) cm.focus(); + + var clear = function() { + cm.operation(function() { + for (var i = 0; i < marks.length; i++) marks[i].clear(); + }); + }; + if (autoclear) setTimeout(clear, 800); + else return clear; + } + } + + function doMatchBrackets(cm) { + cm.operation(function() { + if (cm.state.matchBrackets.currentlyHighlighted) { + cm.state.matchBrackets.currentlyHighlighted(); + cm.state.matchBrackets.currentlyHighlighted = null; + } + cm.state.matchBrackets.currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets); + }); + } + + function clearHighlighted(cm) { + if (cm.state.matchBrackets && cm.state.matchBrackets.currentlyHighlighted) { + cm.state.matchBrackets.currentlyHighlighted(); + cm.state.matchBrackets.currentlyHighlighted = null; + } + } + + CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) { + if (old && old != CodeMirror.Init) { + cm.off("cursorActivity", doMatchBrackets); + cm.off("focus", doMatchBrackets) + cm.off("blur", clearHighlighted) + clearHighlighted(cm); + } + if (val) { + cm.state.matchBrackets = typeof val == "object" ? val : {}; + cm.on("cursorActivity", doMatchBrackets); + cm.on("focus", doMatchBrackets) + cm.on("blur", clearHighlighted) + } + }); + + CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);}); + CodeMirror.defineExtension("findMatchingBracket", function(pos, config, oldConfig){ + // Backwards-compatibility kludge + if (oldConfig || typeof config == "boolean") { + if (!oldConfig) { + config = config ? {strict: true} : null + } else { + oldConfig.strict = config + config = oldConfig + } + } + return findMatchingBracket(this, pos, config) + }); + CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){ + return scanForBracket(this, pos, dir, style, config); + }); +});