|
| 1 | +// CodeMirror, copyright (c) by Marijn Haverbeke and others |
| 2 | +// Distributed under an MIT license: https://codemirror.net/LICENSE |
| 3 | + |
| 4 | +(function(mod) { |
| 5 | + if (typeof exports == "object" && typeof module == "object") // CommonJS |
| 6 | + mod(require("../../lib/codemirror")); |
| 7 | + else if (typeof define == "function" && define.amd) // AMD |
| 8 | + define(["../../lib/codemirror"], mod); |
| 9 | + else // Plain browser env |
| 10 | + mod(CodeMirror); |
| 11 | +})(function(CodeMirror) { |
| 12 | + var ie_lt8 = /MSIE \d/.test(navigator.userAgent) && |
| 13 | + (document.documentMode == null || document.documentMode < 8); |
| 14 | + |
| 15 | + var Pos = CodeMirror.Pos; |
| 16 | + |
| 17 | + var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<", "<": ">>", ">": "<<"}; |
| 18 | + |
| 19 | + function bracketRegex(config) { |
| 20 | + return config && config.bracketRegex || /[(){}[\]]/ |
| 21 | + } |
| 22 | + |
| 23 | + function findMatchingBracket(cm, where, config) { |
| 24 | + var line = cm.getLineHandle(where.line), pos = where.ch - 1; |
| 25 | + var afterCursor = config && config.afterCursor |
| 26 | + if (afterCursor == null) |
| 27 | + afterCursor = /(^| )cm-fat-cursor($| )/.test(cm.getWrapperElement().className) |
| 28 | + var re = bracketRegex(config) |
| 29 | + |
| 30 | + // A cursor is defined as between two characters, but in in vim command mode |
| 31 | + // (i.e. not insert mode), the cursor is visually represented as a |
| 32 | + // highlighted box on top of the 2nd character. Otherwise, we allow matches |
| 33 | + // from before or after the cursor. |
| 34 | + var match = (!afterCursor && pos >= 0 && re.test(line.text.charAt(pos)) && matching[line.text.charAt(pos)]) || |
| 35 | + re.test(line.text.charAt(pos + 1)) && matching[line.text.charAt(++pos)]; |
| 36 | + if (!match) return null; |
| 37 | + var dir = match.charAt(1) == ">" ? 1 : -1; |
| 38 | + if (config && config.strict && (dir > 0) != (pos == where.ch)) return null; |
| 39 | + var style = cm.getTokenTypeAt(Pos(where.line, pos + 1)); |
| 40 | + |
| 41 | + var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style || null, config); |
| 42 | + if (found == null) return null; |
| 43 | + return {from: Pos(where.line, pos), to: found && found.pos, |
| 44 | + match: found && found.ch == match.charAt(0), forward: dir > 0}; |
| 45 | + } |
| 46 | + |
| 47 | + // bracketRegex is used to specify which type of bracket to scan |
| 48 | + // should be a regexp, e.g. /[[\]]/ |
| 49 | + // |
| 50 | + // Note: If "where" is on an open bracket, then this bracket is ignored. |
| 51 | + // |
| 52 | + // Returns false when no bracket was found, null when it reached |
| 53 | + // maxScanLines and gave up |
| 54 | + function scanForBracket(cm, where, dir, style, config) { |
| 55 | + var maxScanLen = (config && config.maxScanLineLength) || 10000; |
| 56 | + var maxScanLines = (config && config.maxScanLines) || 1000; |
| 57 | + |
| 58 | + var stack = []; |
| 59 | + var re = bracketRegex(config) |
| 60 | + var lineEnd = dir > 0 ? Math.min(where.line + maxScanLines, cm.lastLine() + 1) |
| 61 | + : Math.max(cm.firstLine() - 1, where.line - maxScanLines); |
| 62 | + for (var lineNo = where.line; lineNo != lineEnd; lineNo += dir) { |
| 63 | + var line = cm.getLine(lineNo); |
| 64 | + if (!line) continue; |
| 65 | + var pos = dir > 0 ? 0 : line.length - 1, end = dir > 0 ? line.length : -1; |
| 66 | + if (line.length > maxScanLen) continue; |
| 67 | + if (lineNo == where.line) pos = where.ch - (dir < 0 ? 1 : 0); |
| 68 | + for (; pos != end; pos += dir) { |
| 69 | + var ch = line.charAt(pos); |
| 70 | + if (re.test(ch) && (style === undefined || cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style)) { |
| 71 | + var match = matching[ch]; |
| 72 | + if (match && (match.charAt(1) == ">") == (dir > 0)) stack.push(ch); |
| 73 | + else if (!stack.length) return {pos: Pos(lineNo, pos), ch: ch}; |
| 74 | + else stack.pop(); |
| 75 | + } |
| 76 | + } |
| 77 | + } |
| 78 | + return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null; |
| 79 | + } |
| 80 | + |
| 81 | + function matchBrackets(cm, autoclear, config) { |
| 82 | + // Disable brace matching in long lines, since it'll cause hugely slow updates |
| 83 | + var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000; |
| 84 | + var marks = [], ranges = cm.listSelections(); |
| 85 | + for (var i = 0; i < ranges.length; i++) { |
| 86 | + var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, config); |
| 87 | + if (match && cm.getLine(match.from.line).length <= maxHighlightLen) { |
| 88 | + var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket"; |
| 89 | + marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style})); |
| 90 | + if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen) |
| 91 | + marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style})); |
| 92 | + } |
| 93 | + } |
| 94 | + |
| 95 | + if (marks.length) { |
| 96 | + // Kludge to work around the IE bug from issue #1193, where text |
| 97 | + // input stops going to the textare whever this fires. |
| 98 | + if (ie_lt8 && cm.state.focused) cm.focus(); |
| 99 | + |
| 100 | + var clear = function() { |
| 101 | + cm.operation(function() { |
| 102 | + for (var i = 0; i < marks.length; i++) marks[i].clear(); |
| 103 | + }); |
| 104 | + }; |
| 105 | + if (autoclear) setTimeout(clear, 800); |
| 106 | + else return clear; |
| 107 | + } |
| 108 | + } |
| 109 | + |
| 110 | + function doMatchBrackets(cm) { |
| 111 | + cm.operation(function() { |
| 112 | + if (cm.state.matchBrackets.currentlyHighlighted) { |
| 113 | + cm.state.matchBrackets.currentlyHighlighted(); |
| 114 | + cm.state.matchBrackets.currentlyHighlighted = null; |
| 115 | + } |
| 116 | + cm.state.matchBrackets.currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets); |
| 117 | + }); |
| 118 | + } |
| 119 | + |
| 120 | + CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) { |
| 121 | + function clear(cm) { |
| 122 | + if (cm.state.matchBrackets && cm.state.matchBrackets.currentlyHighlighted) { |
| 123 | + cm.state.matchBrackets.currentlyHighlighted(); |
| 124 | + cm.state.matchBrackets.currentlyHighlighted = null; |
| 125 | + } |
| 126 | + } |
| 127 | + |
| 128 | + if (old && old != CodeMirror.Init) { |
| 129 | + cm.off("cursorActivity", doMatchBrackets); |
| 130 | + cm.off("focus", doMatchBrackets) |
| 131 | + cm.off("blur", clear) |
| 132 | + clear(cm); |
| 133 | + } |
| 134 | + if (val) { |
| 135 | + cm.state.matchBrackets = typeof val == "object" ? val : {}; |
| 136 | + cm.on("cursorActivity", doMatchBrackets); |
| 137 | + cm.on("focus", doMatchBrackets) |
| 138 | + cm.on("blur", clear) |
| 139 | + } |
| 140 | + }); |
| 141 | + |
| 142 | + CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);}); |
| 143 | + CodeMirror.defineExtension("findMatchingBracket", function(pos, config, oldConfig){ |
| 144 | + // Backwards-compatibility kludge |
| 145 | + if (oldConfig || typeof config == "boolean") { |
| 146 | + if (!oldConfig) { |
| 147 | + config = config ? {strict: true} : null |
| 148 | + } else { |
| 149 | + oldConfig.strict = config |
| 150 | + config = oldConfig |
| 151 | + } |
| 152 | + } |
| 153 | + return findMatchingBracket(this, pos, config) |
| 154 | + }); |
| 155 | + CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){ |
| 156 | + return scanForBracket(this, pos, dir, style, config); |
| 157 | + }); |
| 158 | +}); |
0 commit comments