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indent-fold.js
45 lines
| 1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others |
| 2 | // Distributed under an MIT license: http://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 | "use strict"; |
| 13 | |
| 14 | CodeMirror.registerHelper("fold", "indent", function(cm, start) { |
| 15 | var tabSize = cm.getOption("tabSize"), firstLine = cm.getLine(start.line); |
| 16 | if (!/\S/.test(firstLine)) return; |
| 17 | var getIndent = function(line) { |
| 18 | return CodeMirror.countColumn(line, null, tabSize); |
| 19 | }; |
| 20 | var myIndent = getIndent(firstLine); |
| 21 | var lastLineInFold = null; |
| 22 | // Go through lines until we find a line that definitely doesn't belong in |
| 23 | // the block we're folding, or to the end. |
| 24 | for (var i = start.line + 1, end = cm.lastLine(); i <= end; ++i) { |
| 25 | var curLine = cm.getLine(i); |
| 26 | var curIndent = getIndent(curLine); |
| 27 | if (curIndent > myIndent) { |
| 28 | // Lines with a greater indent are considered part of the block. |
| 29 | lastLineInFold = i; |
| 30 | } else if (!/\S/.test(curLine)) { |
| 31 | // Empty lines might be breaks within the block we're trying to fold. |
| 32 | } else { |
| 33 | // A non-empty line at an indent equal to or less than ours marks the |
| 34 | // start of another block. |
| 35 | break; |
| 36 | } |
| 37 | } |
| 38 | if (lastLineInFold) return { |
| 39 | from: CodeMirror.Pos(start.line, firstLine.length), |
| 40 | to: CodeMirror.Pos(lastLineInFold, cm.getLine(lastLineInFold).length) |
| 41 | }; |
| 42 | }); |
| 43 | |
| 44 | }); |
| 45 |