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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
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14 function bracketFolding(pairs) {
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15 return function(cm, start) {
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16 var line = start.line, lineText = cm.getLine(line);
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17
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18 function findOpening(pair) {
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19 var tokenType;
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20 for (var at = start.ch, pass = 0;;) {
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21 var found = at <= 0 ? -1 : lineText.lastIndexOf(pair[0], at - 1);
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22 if (found == -1) {
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23 if (pass == 1) break;
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24 pass = 1;
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25 at = lineText.length;
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26 continue;
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27 }
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28 if (pass == 1 && found < start.ch) break;
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29 tokenType = cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1));
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30 if (!/^(comment|string)/.test(tokenType)) return {ch: found + 1, tokenType: tokenType, pair: pair};
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31 at = found - 1;
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32 }
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33 }
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34
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35 function findRange(found) {
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36 var count = 1, lastLine = cm.lastLine(), end, startCh = found.ch, endCh
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37 outer: for (var i = line; i <= lastLine; ++i) {
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38 var text = cm.getLine(i), pos = i == line ? startCh : 0;
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39 for (;;) {
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40 var nextOpen = text.indexOf(found.pair[0], pos), nextClose = text.indexOf(found.pair[1], pos);
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41 if (nextOpen < 0) nextOpen = text.length;
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42 if (nextClose < 0) nextClose = text.length;
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43 pos = Math.min(nextOpen, nextClose);
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44 if (pos == text.length) break;
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45 if (cm.getTokenTypeAt(CodeMirror.Pos(i, pos + 1)) == found.tokenType) {
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46 if (pos == nextOpen) ++count;
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47 else if (!--count) { end = i; endCh = pos; break outer; }
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48 }
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49 ++pos;
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50 }
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51 }
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52
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53 if (end == null || line == end) return null
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54 return {from: CodeMirror.Pos(line, startCh),
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55 to: CodeMirror.Pos(end, endCh)};
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56 }
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57
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58 var found = []
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59 for (var i = 0; i < pairs.length; i++) {
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60 var open = findOpening(pairs[i])
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61 if (open) found.push(open)
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62 }
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63 found.sort(function(a, b) { return a.ch - b.ch })
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64 for (var i = 0; i < found.length; i++) {
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65 var range = findRange(found[i])
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66 if (range) return range
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67 }
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68 return null
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69 }
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70 }
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71
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72 CodeMirror.registerHelper("fold", "brace", bracketFolding([["{", "}"], ["[", "]"]]));
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73
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74 CodeMirror.registerHelper("fold", "brace-paren", bracketFolding([["{", "}"], ["[", "]"], ["(", ")"]]));
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75
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76 CodeMirror.registerHelper("fold", "import", function(cm, start) {
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77 function hasImport(line) {
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78 if (line < cm.firstLine() || line > cm.lastLine()) return null;
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79 var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
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80 if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
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81 if (start.type != "keyword" || start.string != "import") return null;
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82 // Now find closing semicolon, return its position
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83 for (var i = line, e = Math.min(cm.lastLine(), line + 10); i <= e; ++i) {
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84 var text = cm.getLine(i), semi = text.indexOf(";");
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85 if (semi != -1) return {startCh: start.end, end: CodeMirror.Pos(i, semi)};
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86 }
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87 }
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88
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89 var startLine = start.line, has = hasImport(startLine), prev;
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90 if (!has || hasImport(startLine - 1) || ((prev = hasImport(startLine - 2)) && prev.end.line == startLine - 1))
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91 return null;
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92 for (var end = has.end;;) {
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93 var next = hasImport(end.line + 1);
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94 if (next == null) break;
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95 end = next.end;
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96 }
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97 return {from: cm.clipPos(CodeMirror.Pos(startLine, has.startCh + 1)), to: end};
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98 });
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99
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100 CodeMirror.registerHelper("fold", "include", function(cm, start) {
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101 function hasInclude(line) {
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102 if (line < cm.firstLine() || line > cm.lastLine()) return null;
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103 var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
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104 if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
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105 if (start.type == "meta" && start.string.slice(0, 8) == "#include") return start.start + 8;
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106 }
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107
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108 var startLine = start.line, has = hasInclude(startLine);
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109 if (has == null || hasInclude(startLine - 1) != null) return null;
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110 for (var end = startLine;;) {
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111 var next = hasInclude(end + 1);
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112 if (next == null) break;
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113 ++end;
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114 }
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115 return {from: CodeMirror.Pos(startLine, has + 1),
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116 to: cm.clipPos(CodeMirror.Pos(end))};
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117 });
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118
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119 });
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