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45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
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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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(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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"use strict";
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CodeMirror.registerHelper("fold", "indent", function(cm, start) {
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var tabSize = cm.getOption("tabSize"), firstLine = cm.getLine(start.line);
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if (!/\S/.test(firstLine)) return;
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var getIndent = function(line) {
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return CodeMirror.countColumn(line, null, tabSize);
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};
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var myIndent = getIndent(firstLine);
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var lastLineInFold = null;
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// Go through lines until we find a line that definitely doesn't belong in
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// the block we're folding, or to the end.
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for (var i = start.line + 1, end = cm.lastLine(); i <= end; ++i) {
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var curLine = cm.getLine(i);
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var curIndent = getIndent(curLine);
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if (curIndent > myIndent) {
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// Lines with a greater indent are considered part of the block.
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lastLineInFold = i;
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} else if (!/\S/.test(curLine)) {
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// Empty lines might be breaks within the block we're trying to fold.
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} else {
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// A non-empty line at an indent equal to or less than ours marks the
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// start of another block.
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break;
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}
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}
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if (lastLineInFold) return {
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from: CodeMirror.Pos(start.line, firstLine.length),
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to: CodeMirror.Pos(lastLineInFold, cm.getLine(lastLineInFold).length)
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};
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});
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});
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