1// CodeMirror, copyright (c) by Marijn Haverbeke and others 2// Distributed under an MIT license: http://codemirror.net/LICENSE 3 4// Because sometimes you need to mark the selected *text*. 5// 6// Adds an option 'styleSelectedText' which, when enabled, gives 7// selected text the CSS class given as option value, or 8// "CodeMirror-selectedtext" when the value is not a string. 9 10(function(mod) { 11 if (typeof exports == "object" && typeof module == "object") // CommonJS 12 mod(require("../../lib/codemirror")); 13 else if (typeof define == "function" && define.amd) // AMD 14 define(["../../lib/codemirror"], mod); 15 else // Plain browser env 16 mod(CodeMirror); 17})(function(CodeMirror) { 18 "use strict"; 19 20 CodeMirror.defineOption("styleSelectedText", false, function(cm, val, old) { 21 var prev = old && old != CodeMirror.Init; 22 if (val && !prev) { 23 cm.state.markedSelection = []; 24 cm.state.markedSelectionStyle = typeof val == "string" ? val : "CodeMirror-selectedtext"; 25 reset(cm); 26 cm.on("cursorActivity", onCursorActivity); 27 cm.on("change", onChange); 28 } else if (!val && prev) { 29 cm.off("cursorActivity", onCursorActivity); 30 cm.off("change", onChange); 31 clear(cm); 32 cm.state.markedSelection = cm.state.markedSelectionStyle = null; 33 } 34 }); 35 36 function onCursorActivity(cm) { 37 cm.operation(function() { update(cm); }); 38 } 39 40 function onChange(cm) { 41 if (cm.state.markedSelection.length) 42 cm.operation(function() { clear(cm); }); 43 } 44 45 var CHUNK_SIZE = 8; 46 var Pos = CodeMirror.Pos; 47 var cmp = CodeMirror.cmpPos; 48 49 function coverRange(cm, from, to, addAt) { 50 if (cmp(from, to) == 0) return; 51 var array = cm.state.markedSelection; 52 var cls = cm.state.markedSelectionStyle; 53 for (var line = from.line;;) { 54 var start = line == from.line ? from : Pos(line, 0); 55 var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line; 56 var end = atEnd ? to : Pos(endLine, 0); 57 var mark = cm.markText(start, end, {className: cls}); 58 if (addAt == null) array.push(mark); 59 else array.splice(addAt++, 0, mark); 60 if (atEnd) break; 61 line = endLine; 62 } 63 } 64 65 function clear(cm) { 66 var array = cm.state.markedSelection; 67 for (var i = 0; i < array.length; ++i) array[i].clear(); 68 array.length = 0; 69 } 70 71 function reset(cm) { 72 clear(cm); 73 var ranges = cm.listSelections(); 74 for (var i = 0; i < ranges.length; i++) 75 coverRange(cm, ranges[i].from(), ranges[i].to()); 76 } 77 78 function update(cm) { 79 if (!cm.somethingSelected()) return clear(cm); 80 if (cm.listSelections().length > 1) return reset(cm); 81 82 var from = cm.getCursor("start"), to = cm.getCursor("end"); 83 84 var array = cm.state.markedSelection; 85 if (!array.length) return coverRange(cm, from, to); 86 87 var coverStart = array[0].find(), coverEnd = array[array.length - 1].find(); 88 if (!coverStart || !coverEnd || to.line - from.line < CHUNK_SIZE || 89 cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0) 90 return reset(cm); 91 92 while (cmp(from, coverStart.from) > 0) { 93 array.shift().clear(); 94 coverStart = array[0].find(); 95 } 96 if (cmp(from, coverStart.from) < 0) { 97 if (coverStart.to.line - from.line < CHUNK_SIZE) { 98 array.shift().clear(); 99 coverRange(cm, from, coverStart.to, 0); 100 } else { 101 coverRange(cm, from, coverStart.from, 0); 102 } 103 } 104 105 while (cmp(to, coverEnd.to) < 0) { 106 array.pop().clear(); 107 coverEnd = array[array.length - 1].find(); 108 } 109 if (cmp(to, coverEnd.to) > 0) { 110 if (to.line - coverEnd.from.line < CHUNK_SIZE) { 111 array.pop().clear(); 112 coverRange(cm, coverEnd.from, to); 113 } else { 114 coverRange(cm, coverEnd.to, to); 115 } 116 } 117 } 118}); 119