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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 var nonspace = /\S/g;
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13 var repeat = String.prototype.repeat || function (n) { return Array(n + 1).join(this); };
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14 function continueComment(cm) {
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15 if (cm.getOption("disableInput")) return CodeMirror.Pass;
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16 var ranges = cm.listSelections(), mode, inserts = [];
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17 for (var i = 0; i < ranges.length; i++) {
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18 var pos = ranges[i].head
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19 if (!/\bcomment\b/.test(cm.getTokenTypeAt(pos))) return CodeMirror.Pass;
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20 var modeHere = cm.getModeAt(pos)
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21 if (!mode) mode = modeHere;
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22 else if (mode != modeHere) return CodeMirror.Pass;
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23
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24 var insert = null, line, found;
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25 var blockStart = mode.blockCommentStart, lineCmt = mode.lineComment;
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26 if (blockStart && mode.blockCommentContinue) {
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27 line = cm.getLine(pos.line);
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28 var end = line.lastIndexOf(mode.blockCommentEnd, pos.ch - mode.blockCommentEnd.length);
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29 // 1. if this block comment ended
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30 // 2. if this is actually inside a line comment
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31 if (end != -1 && end == pos.ch - mode.blockCommentEnd.length ||
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32 lineCmt && (found = line.lastIndexOf(lineCmt, pos.ch - 1)) > -1 &&
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33 /\bcomment\b/.test(cm.getTokenTypeAt({line: pos.line, ch: found + 1}))) {
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34 // ...then don't continue it
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35 } else if (pos.ch >= blockStart.length &&
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36 (found = line.lastIndexOf(blockStart, pos.ch - blockStart.length)) > -1 &&
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37 found > end) {
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38 // reuse the existing leading spaces/tabs/mixed
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39 // or build the correct indent using CM's tab/indent options
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40 if (nonspaceAfter(0, line) >= found) {
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41 insert = line.slice(0, found);
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42 } else {
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43 var tabSize = cm.options.tabSize, numTabs;
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44 found = CodeMirror.countColumn(line, found, tabSize);
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45 insert = !cm.options.indentWithTabs ? repeat.call(" ", found) :
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46 repeat.call("\t", (numTabs = Math.floor(found / tabSize))) +
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47 repeat.call(" ", found - tabSize * numTabs);
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48 }
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49 } else if ((found = line.indexOf(mode.blockCommentContinue)) > -1 &&
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50 found <= pos.ch &&
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51 found <= nonspaceAfter(0, line)) {
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52 insert = line.slice(0, found);
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53 }
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54 if (insert != null) insert += mode.blockCommentContinue
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55 }
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56 if (insert == null && lineCmt && continueLineCommentEnabled(cm)) {
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57 if (line == null) line = cm.getLine(pos.line);
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58 found = line.indexOf(lineCmt);
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59 // cursor at pos 0, line comment also at pos 0 => shift it down, don't continue
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60 if (!pos.ch && !found) insert = "";
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61 // continue only if the line starts with an optional space + line comment
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62 else if (found > -1 && nonspaceAfter(0, line) >= found) {
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63 // don't continue if there's only space(s) after cursor or the end of the line
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64 insert = nonspaceAfter(pos.ch, line) > -1;
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65 // but always continue if the next line starts with a line comment too
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66 if (!insert) {
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67 var next = cm.getLine(pos.line + 1) || '',
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68 nextFound = next.indexOf(lineCmt);
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69 insert = nextFound > -1 && nonspaceAfter(0, next) >= nextFound || null;
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70 }
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71 if (insert) {
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72 insert = line.slice(0, found) + lineCmt +
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73 line.slice(found + lineCmt.length).match(/^\s*/)[0];
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74 }
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75 }
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76 }
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77 if (insert == null) return CodeMirror.Pass;
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78 inserts[i] = "\n" + insert;
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79 }
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80
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81 cm.operation(function() {
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82 for (var i = ranges.length - 1; i >= 0; i--)
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83 cm.replaceRange(inserts[i], ranges[i].from(), ranges[i].to(), "+insert");
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84 });
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85 }
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86
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87 function nonspaceAfter(ch, str) {
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88 nonspace.lastIndex = ch;
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89 var m = nonspace.exec(str);
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90 return m ? m.index : -1;
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91 }
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92
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93 function continueLineCommentEnabled(cm) {
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94 var opt = cm.getOption("continueComments");
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95 if (opt && typeof opt == "object")
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96 return opt.continueLineComment !== false;
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97 return true;
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98 }
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99
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100 CodeMirror.defineOption("continueComments", null, function(cm, val, prev) {
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101 if (prev && prev != CodeMirror.Init)
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102 cm.removeKeyMap("continueComment");
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103 if (val) {
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104 var key = "Enter";
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105 if (typeof val == "string")
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106 key = val;
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107 else if (typeof val == "object" && val.key)
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108 key = val.key;
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109 var map = {name: "continueComment"};
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110 map[key] = continueComment;
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111 cm.addKeyMap(map);
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112 }
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113 });
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114 });
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