Commit | Line | Data |
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77b7b761 TD |
1 | // Because sometimes you need to mark the selected *text*. |
2 | // | |
3 | // Adds an option 'styleSelectedText' which, when enabled, gives | |
4 | // selected text the CSS class given as option value, or | |
5 | // "CodeMirror-selectedtext" when the value is not a string. | |
6 | ||
837afb80 TD |
7 | (function(mod) { |
8 | if (typeof exports == "object" && typeof module == "object") // CommonJS | |
9 | mod(require("../../lib/codemirror")); | |
10 | else if (typeof define == "function" && define.amd) // AMD | |
11 | define(["../../lib/codemirror"], mod); | |
12 | else // Plain browser env | |
13 | mod(CodeMirror); | |
14 | })(function(CodeMirror) { | |
77b7b761 TD |
15 | "use strict"; |
16 | ||
17 | CodeMirror.defineOption("styleSelectedText", false, function(cm, val, old) { | |
18 | var prev = old && old != CodeMirror.Init; | |
19 | if (val && !prev) { | |
20 | cm.state.markedSelection = []; | |
21 | cm.state.markedSelectionStyle = typeof val == "string" ? val : "CodeMirror-selectedtext"; | |
22 | reset(cm); | |
23 | cm.on("cursorActivity", onCursorActivity); | |
24 | cm.on("change", onChange); | |
25 | } else if (!val && prev) { | |
26 | cm.off("cursorActivity", onCursorActivity); | |
27 | cm.off("change", onChange); | |
28 | clear(cm); | |
29 | cm.state.markedSelection = cm.state.markedSelectionStyle = null; | |
30 | } | |
31 | }); | |
32 | ||
33 | function onCursorActivity(cm) { | |
34 | cm.operation(function() { update(cm); }); | |
35 | } | |
36 | ||
37 | function onChange(cm) { | |
38 | if (cm.state.markedSelection.length) | |
39 | cm.operation(function() { clear(cm); }); | |
40 | } | |
41 | ||
42 | var CHUNK_SIZE = 8; | |
43 | var Pos = CodeMirror.Pos; | |
837afb80 | 44 | var cmp = CodeMirror.cmpPos; |
77b7b761 TD |
45 | |
46 | function coverRange(cm, from, to, addAt) { | |
47 | if (cmp(from, to) == 0) return; | |
48 | var array = cm.state.markedSelection; | |
49 | var cls = cm.state.markedSelectionStyle; | |
50 | for (var line = from.line;;) { | |
51 | var start = line == from.line ? from : Pos(line, 0); | |
52 | var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line; | |
53 | var end = atEnd ? to : Pos(endLine, 0); | |
54 | var mark = cm.markText(start, end, {className: cls}); | |
55 | if (addAt == null) array.push(mark); | |
56 | else array.splice(addAt++, 0, mark); | |
57 | if (atEnd) break; | |
58 | line = endLine; | |
59 | } | |
60 | } | |
61 | ||
62 | function clear(cm) { | |
63 | var array = cm.state.markedSelection; | |
64 | for (var i = 0; i < array.length; ++i) array[i].clear(); | |
65 | array.length = 0; | |
66 | } | |
67 | ||
68 | function reset(cm) { | |
69 | clear(cm); | |
837afb80 TD |
70 | var ranges = cm.listSelections(); |
71 | for (var i = 0; i < ranges.length; i++) | |
72 | coverRange(cm, ranges[i].from(), ranges[i].to()); | |
77b7b761 TD |
73 | } |
74 | ||
75 | function update(cm) { | |
837afb80 TD |
76 | if (!cm.somethingSelected()) return clear(cm); |
77 | if (cm.listSelections().length > 1) return reset(cm); | |
78 | ||
77b7b761 | 79 | var from = cm.getCursor("start"), to = cm.getCursor("end"); |
77b7b761 TD |
80 | |
81 | var array = cm.state.markedSelection; | |
82 | if (!array.length) return coverRange(cm, from, to); | |
83 | ||
84 | var coverStart = array[0].find(), coverEnd = array[array.length - 1].find(); | |
85 | if (!coverStart || !coverEnd || to.line - from.line < CHUNK_SIZE || | |
86 | cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0) | |
87 | return reset(cm); | |
88 | ||
89 | while (cmp(from, coverStart.from) > 0) { | |
90 | array.shift().clear(); | |
91 | coverStart = array[0].find(); | |
92 | } | |
93 | if (cmp(from, coverStart.from) < 0) { | |
94 | if (coverStart.to.line - from.line < CHUNK_SIZE) { | |
95 | array.shift().clear(); | |
96 | coverRange(cm, from, coverStart.to, 0); | |
97 | } else { | |
98 | coverRange(cm, from, coverStart.from, 0); | |
99 | } | |
100 | } | |
101 | ||
102 | while (cmp(to, coverEnd.to) < 0) { | |
103 | array.pop().clear(); | |
104 | coverEnd = array[array.length - 1].find(); | |
105 | } | |
106 | if (cmp(to, coverEnd.to) > 0) { | |
107 | if (to.line - coverEnd.from.line < CHUNK_SIZE) { | |
108 | array.pop().clear(); | |
109 | coverRange(cm, coverEnd.from, to); | |
110 | } else { | |
111 | coverRange(cm, coverEnd.to, to); | |
112 | } | |
113 | } | |
114 | } | |
837afb80 | 115 | }); |