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76 lines
2.4 KiB
JavaScript
76 lines
2.4 KiB
JavaScript
(function() {
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"use strict";
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function doFold(cm, pos, options, force) {
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var finder = options && (options.call ? options : options.rangeFinder);
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if (!finder) finder = cm.getHelper(pos, "fold");
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if (!finder) return;
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if (typeof pos == "number") pos = CodeMirror.Pos(pos, 0);
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var minSize = options && options.minFoldSize || 0;
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function getRange(allowFolded) {
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var range = finder(cm, pos);
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if (!range || range.to.line - range.from.line < minSize) return null;
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var marks = cm.findMarksAt(range.from);
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for (var i = 0; i < marks.length; ++i) {
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if (marks[i].__isFold && force !== "fold") {
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if (!allowFolded) return null;
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range.cleared = true;
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marks[i].clear();
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}
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}
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return range;
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}
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var range = getRange(true);
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if (options && options.scanUp) while (!range && pos.line > cm.firstLine()) {
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pos = CodeMirror.Pos(pos.line - 1, 0);
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range = getRange(false);
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}
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if (!range || range.cleared || force === "unfold") return;
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var myWidget = makeWidget(options);
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CodeMirror.on(myWidget, "mousedown", function() { myRange.clear(); });
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var myRange = cm.markText(range.from, range.to, {
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replacedWith: myWidget,
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clearOnEnter: true,
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__isFold: true
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});
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myRange.on("clear", function(from, to) {
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CodeMirror.signal(cm, "unfold", cm, from, to);
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});
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CodeMirror.signal(cm, "fold", cm, range.from, range.to);
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}
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function makeWidget(options) {
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var widget = (options && options.widget) || "\u2194";
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if (typeof widget == "string") {
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var text = document.createTextNode(widget);
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widget = document.createElement("span");
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widget.appendChild(text);
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widget.className = "CodeMirror-foldmarker";
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}
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return widget;
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}
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// Clumsy backwards-compatible interface
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CodeMirror.newFoldFunction = function(rangeFinder, widget) {
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return function(cm, pos) { doFold(cm, pos, {rangeFinder: rangeFinder, widget: widget}); };
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};
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// New-style interface
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CodeMirror.defineExtension("foldCode", function(pos, options, force) {
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doFold(this, pos, options, force);
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});
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CodeMirror.registerHelper("fold", "combine", function() {
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var funcs = Array.prototype.slice.call(arguments, 0);
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return function(cm, start) {
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for (var i = 0; i < funcs.length; ++i) {
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var found = funcs[i](cm, start);
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if (found) return found;
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}
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};
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});
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})();
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