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