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10 | (function(mod) {
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11 | if (typeof exports == "object" && typeof module == "object")
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12 | mod(require("../../lib/codemirror"));
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13 | else if (typeof define == "function" && define.amd)
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14 | define(["../../lib/codemirror"], mod);
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15 | else
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16 | mod(CodeMirror);
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17 | })(function(CodeMirror) {
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18 | "use strict";
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19 |
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20 | CodeMirror.defineOption("styleSelectedText", false, function(cm, val, old) {
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21 | var prev = old && old != CodeMirror.Init;
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22 | if (val && !prev) {
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23 | cm.state.markedSelection = [];
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24 | cm.state.markedSelectionStyle = typeof val == "string" ? val : "CodeMirror-selectedtext";
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25 | reset(cm);
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26 | cm.on("cursorActivity", onCursorActivity);
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27 | cm.on("change", onChange);
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28 | } else if (!val && prev) {
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29 | cm.off("cursorActivity", onCursorActivity);
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30 | cm.off("change", onChange);
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31 | clear(cm);
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32 | cm.state.markedSelection = cm.state.markedSelectionStyle = null;
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33 | }
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34 | });
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35 |
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36 | function onCursorActivity(cm) {
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37 | if (cm.state.markedSelection)
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38 | cm.operation(function() { update(cm); });
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39 | }
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40 |
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41 | function onChange(cm) {
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42 | if (cm.state.markedSelection && cm.state.markedSelection.length)
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43 | cm.operation(function() { clear(cm); });
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44 | }
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45 |
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46 | var CHUNK_SIZE = 8;
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47 | var Pos = CodeMirror.Pos;
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48 | var cmp = CodeMirror.cmpPos;
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49 |
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50 | function coverRange(cm, from, to, addAt) {
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51 | if (cmp(from, to) == 0) return;
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52 | var array = cm.state.markedSelection;
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53 | var cls = cm.state.markedSelectionStyle;
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54 | for (var line = from.line;;) {
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55 | var start = line == from.line ? from : Pos(line, 0);
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56 | var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line;
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57 | var end = atEnd ? to : Pos(endLine, 0);
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58 | var mark = cm.markText(start, end, {className: cls});
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59 | if (addAt == null) array.push(mark);
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60 | else array.splice(addAt++, 0, mark);
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61 | if (atEnd) break;
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62 | line = endLine;
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63 | }
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64 | }
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65 |
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66 | function clear(cm) {
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67 | var array = cm.state.markedSelection;
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68 | for (var i = 0; i < array.length; ++i) array[i].clear();
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69 | array.length = 0;
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70 | }
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71 |
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72 | function reset(cm) {
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73 | clear(cm);
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74 | var ranges = cm.listSelections();
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75 | for (var i = 0; i < ranges.length; i++)
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76 | coverRange(cm, ranges[i].from(), ranges[i].to());
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77 | }
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78 |
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79 | function update(cm) {
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80 | if (!cm.somethingSelected()) return clear(cm);
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81 | if (cm.listSelections().length > 1) return reset(cm);
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82 |
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83 | var from = cm.getCursor("start"), to = cm.getCursor("end");
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84 |
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85 | var array = cm.state.markedSelection;
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86 | if (!array.length) return coverRange(cm, from, to);
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87 |
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88 | var coverStart = array[0].find(), coverEnd = array[array.length - 1].find();
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89 | if (!coverStart || !coverEnd || to.line - from.line <= CHUNK_SIZE ||
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90 | cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0)
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91 | return reset(cm);
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92 |
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93 | while (cmp(from, coverStart.from) > 0) {
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94 | array.shift().clear();
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95 | coverStart = array[0].find();
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96 | }
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97 | if (cmp(from, coverStart.from) < 0) {
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98 | if (coverStart.to.line - from.line < CHUNK_SIZE) {
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99 | array.shift().clear();
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100 | coverRange(cm, from, coverStart.to, 0);
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101 | } else {
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102 | coverRange(cm, from, coverStart.from, 0);
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103 | }
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104 | }
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105 |
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106 | while (cmp(to, coverEnd.to) < 0) {
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107 | array.pop().clear();
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108 | coverEnd = array[array.length - 1].find();
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109 | }
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110 | if (cmp(to, coverEnd.to) > 0) {
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111 | if (to.line - coverEnd.from.line < CHUNK_SIZE) {
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112 | array.pop().clear();
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113 | coverRange(cm, coverEnd.from, to);
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114 | } else {
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115 | coverRange(cm, coverEnd.to, to);
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116 | }
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117 | }
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118 | }
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119 | });
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