| 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("../../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 | 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 | }); |