diff options
Diffstat (limited to 'devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js')
-rw-r--r-- | devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js b/devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js new file mode 100644 index 000000000..70e1ae18c --- /dev/null +++ b/devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js @@ -0,0 +1,120 @@ +// CodeMirror, copyright (c) by Marijn Haverbeke and others +// Distributed under an MIT license: http://codemirror.net/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 findMatchingBracket(cm, where, strict, config) { + var line = cm.getLineHandle(where.line), pos = where.ch - 1; + var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)]; + if (!match) return null; + var dir = match.charAt(1) == ">" ? 1 : -1; + if (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 || null, 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 = config && config.bracketRegex ? config.bracketRegex : /[(){}[\]]/; + 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.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; + var marks = [], ranges = cm.listSelections(); + for (var i = 0; i < ranges.length; i++) { + var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, false, config); + if (match && 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 textare whever 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; + } + } + + var currentlyHighlighted = null; + function doMatchBrackets(cm) { + cm.operation(function() { + if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;} + currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets); + }); + } + + CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) { + if (old && old != CodeMirror.Init) + cm.off("cursorActivity", doMatchBrackets); + if (val) { + cm.state.matchBrackets = typeof val == "object" ? val : {}; + cm.on("cursorActivity", doMatchBrackets); + } + }); + + CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);}); + CodeMirror.defineExtension("findMatchingBracket", function(pos, strict, config){ + return findMatchingBracket(this, pos, strict, config); + }); + CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){ + return scanForBracket(this, pos, dir, style, config); + }); +}); |