mark-selection.js (3902B)
1 // CodeMirror, copyright (c) by Marijn Haverbeke and others 2 // Distributed under an MIT license: https://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("resource://devtools/client/shared/sourceeditor/codemirror/lib/codemirror.js")); 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 if (cm.state.markedSelection) 38 cm.operation(function() { update(cm); }); 39 } 40 41 function onChange(cm) { 42 if (cm.state.markedSelection && cm.state.markedSelection.length) 43 cm.operation(function() { clear(cm); }); 44 } 45 46 var CHUNK_SIZE = 8; 47 var Pos = CodeMirror.Pos; 48 var cmp = CodeMirror.cmpPos; 49 50 function coverRange(cm, from, to, addAt) { 51 if (cmp(from, to) == 0) return; 52 var array = cm.state.markedSelection; 53 var cls = cm.state.markedSelectionStyle; 54 for (var line = from.line;;) { 55 var start = line == from.line ? from : Pos(line, 0); 56 var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line; 57 var end = atEnd ? to : Pos(endLine, 0); 58 var mark = cm.markText(start, end, {className: cls}); 59 if (addAt == null) array.push(mark); 60 else array.splice(addAt++, 0, mark); 61 if (atEnd) break; 62 line = endLine; 63 } 64 } 65 66 function clear(cm) { 67 var array = cm.state.markedSelection; 68 for (var i = 0; i < array.length; ++i) array[i].clear(); 69 array.length = 0; 70 } 71 72 function reset(cm) { 73 clear(cm); 74 var ranges = cm.listSelections(); 75 for (var i = 0; i < ranges.length; i++) 76 coverRange(cm, ranges[i].from(), ranges[i].to()); 77 } 78 79 function update(cm) { 80 if (!cm.somethingSelected()) return clear(cm); 81 if (cm.listSelections().length > 1) return reset(cm); 82 83 var from = cm.getCursor("start"), to = cm.getCursor("end"); 84 85 var array = cm.state.markedSelection; 86 if (!array.length) return coverRange(cm, from, to); 87 88 var coverStart = array[0].find(), coverEnd = array[array.length - 1].find(); 89 if (!coverStart || !coverEnd || to.line - from.line <= CHUNK_SIZE || 90 cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0) 91 return reset(cm); 92 93 while (cmp(from, coverStart.from) > 0) { 94 array.shift().clear(); 95 coverStart = array[0].find(); 96 } 97 if (cmp(from, coverStart.from) < 0) { 98 if (coverStart.to.line - from.line < CHUNK_SIZE) { 99 array.shift().clear(); 100 coverRange(cm, from, coverStart.to, 0); 101 } else { 102 coverRange(cm, from, coverStart.from, 0); 103 } 104 } 105 106 while (cmp(to, coverEnd.to) < 0) { 107 array.pop().clear(); 108 coverEnd = array[array.length - 1].find(); 109 } 110 if (cmp(to, coverEnd.to) > 0) { 111 if (to.line - coverEnd.from.line < CHUNK_SIZE) { 112 array.pop().clear(); 113 coverRange(cm, coverEnd.from, to); 114 } else { 115 coverRange(cm, coverEnd.to, to); 116 } 117 } 118 } 119 });