Mercurial > hg > rc1

comparison plugins/managesieve/codemirror/addon/selection/mark-selection.js @ 0:1e000243b222

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vanilla 1.3.3 distro, I hope
author Charlie Root
date Thu, 04 Jan 2018 15:50:29 -0500
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-1:000000000000 0:1e000243b222
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 });