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1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
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2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
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3
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4 (function(mod) {
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5 if (typeof exports == "object" && typeof module == "object") // CommonJS
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6 mod(require("../../lib/codemirror"));
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../../lib/codemirror"], mod);
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9 else // Plain browser env
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10 mod(CodeMirror);
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11 })(function(CodeMirror) {
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12 "use strict";
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13 var WRAP_CLASS = "CodeMirror-activeline";
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14 var BACK_CLASS = "CodeMirror-activeline-background";
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15 var GUTT_CLASS = "CodeMirror-activeline-gutter";
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16
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17 CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
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18 var prev = old == CodeMirror.Init ? false : old;
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19 if (val == prev) return
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20 if (prev) {
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21 cm.off("beforeSelectionChange", selectionChange);
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22 clearActiveLines(cm);
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23 delete cm.state.activeLines;
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24 }
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25 if (val) {
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26 cm.state.activeLines = [];
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27 updateActiveLines(cm, cm.listSelections());
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28 cm.on("beforeSelectionChange", selectionChange);
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29 }
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30 });
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31
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32 function clearActiveLines(cm) {
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33 for (var i = 0; i < cm.state.activeLines.length; i++) {
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34 cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
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35 cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
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36 cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
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37 }
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38 }
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39
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40 function sameArray(a, b) {
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41 if (a.length != b.length) return false;
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42 for (var i = 0; i < a.length; i++)
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43 if (a[i] != b[i]) return false;
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44 return true;
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45 }
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46
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47 function updateActiveLines(cm, ranges) {
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48 var active = [];
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49 for (var i = 0; i < ranges.length; i++) {
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50 var range = ranges[i];
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51 var option = cm.getOption("styleActiveLine");
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52 if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
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53 continue
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54 var line = cm.getLineHandleVisualStart(range.head.line);
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55 if (active[active.length - 1] != line) active.push(line);
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56 }
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57 if (sameArray(cm.state.activeLines, active)) return;
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58 cm.operation(function() {
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59 clearActiveLines(cm);
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60 for (var i = 0; i < active.length; i++) {
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61 cm.addLineClass(active[i], "wrap", WRAP_CLASS);
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62 cm.addLineClass(active[i], "background", BACK_CLASS);
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63 cm.addLineClass(active[i], "gutter", GUTT_CLASS);
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64 }
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65 cm.state.activeLines = active;
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66 });
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67 }
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68
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69 function selectionChange(cm, sel) {
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70 updateActiveLines(cm, sel.ranges);
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71 }
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72 });
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