Commit | Line | Data |
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44f4c339 | 1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others |
373d1232 | 2 | // Distributed under an MIT license: https://codemirror.net/LICENSE |
44f4c339 | 3 | |
77b7b761 TD |
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 | ||
837afb80 TD |
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) { | |
77b7b761 TD |
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) { | |
373d1232 TD |
37 | if (cm.state.markedSelection) |
38 | cm.operation(function() { update(cm); }); | |
77b7b761 TD |
39 | } |
40 | ||
41 | function onChange(cm) { | |
373d1232 | 42 | if (cm.state.markedSelection && cm.state.markedSelection.length) |
77b7b761 TD |
43 | cm.operation(function() { clear(cm); }); |
44 | } | |
45 | ||
46 | var CHUNK_SIZE = 8; | |
47 | var Pos = CodeMirror.Pos; | |
837afb80 | 48 | var cmp = CodeMirror.cmpPos; |
77b7b761 TD |
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); | |
837afb80 TD |
74 | var ranges = cm.listSelections(); |
75 | for (var i = 0; i < ranges.length; i++) | |
76 | coverRange(cm, ranges[i].from(), ranges[i].to()); | |
77b7b761 TD |
77 | } |
78 | ||
79 | function update(cm) { | |
837afb80 TD |
80 | if (!cm.somethingSelected()) return clear(cm); |
81 | if (cm.listSelections().length > 1) return reset(cm); | |
82 | ||
77b7b761 | 83 | var from = cm.getCursor("start"), to = cm.getCursor("end"); |
77b7b761 TD |
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(); | |
373d1232 | 89 | if (!coverStart || !coverEnd || to.line - from.line <= CHUNK_SIZE || |
77b7b761 TD |
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 | } | |
837afb80 | 119 | }); |