1 | (function () {
|
2 |
|
3 | if (typeof self === 'undefined' || !self.Prism || !self.document) {
|
4 | return;
|
5 | }
|
6 |
|
7 | var MATCH_ALL_CLASS = /(?:^|\s)match-braces(?:\s|$)/;
|
8 |
|
9 | var BRACE_HOVER_CLASS = /(?:^|\s)brace-hover(?:\s|$)/;
|
10 | var BRACE_SELECTED_CLASS = /(?:^|\s)brace-selected(?:\s|$)/;
|
11 |
|
12 | var NO_BRACE_HOVER_CLASS = /(?:^|\s)no-brace-hover(?:\s|$)/;
|
13 | var NO_BRACE_SELECT_CLASS = /(?:^|\s)no-brace-select(?:\s|$)/;
|
14 |
|
15 | var PARTNER = {
|
16 | '(': ')',
|
17 | '[': ']',
|
18 | '{': '}',
|
19 | };
|
20 |
|
21 | var NAMES = {
|
22 | '(': 'brace-round',
|
23 | '[': 'brace-square',
|
24 | '{': 'brace-curly',
|
25 | };
|
26 |
|
27 | var LEVEL_WARP = 12;
|
28 |
|
29 | var pairIdCounter = 0;
|
30 |
|
31 | var BRACE_ID_PATTERN = /^(pair-\d+-)(open|close)$/;
|
32 |
|
33 | |
34 |
|
35 |
|
36 |
|
37 |
|
38 |
|
39 | function getPartnerBrace(brace) {
|
40 | var match = BRACE_ID_PATTERN.exec(brace.id);
|
41 | return document.querySelector('#' + match[1] + (match[2] == 'open' ? 'close' : 'open'));
|
42 | }
|
43 |
|
44 | |
45 |
|
46 |
|
47 | function hoverBrace() {
|
48 | for (var parent = this.parentElement; parent; parent = parent.parentElement) {
|
49 | if (NO_BRACE_HOVER_CLASS.test(parent.className)) {
|
50 | return;
|
51 | }
|
52 | }
|
53 |
|
54 | [this, getPartnerBrace(this)].forEach(function (ele) {
|
55 | ele.className = (ele.className.replace(BRACE_HOVER_CLASS, ' ') + ' brace-hover').replace(/\s+/g, ' ');
|
56 | });
|
57 | }
|
58 | |
59 |
|
60 |
|
61 | function leaveBrace() {
|
62 | [this, getPartnerBrace(this)].forEach(function (ele) {
|
63 | ele.className = ele.className.replace(BRACE_HOVER_CLASS, ' ');
|
64 | });
|
65 | }
|
66 | |
67 |
|
68 |
|
69 | function clickBrace() {
|
70 | for (var parent = this.parentElement; parent; parent = parent.parentElement) {
|
71 | if (NO_BRACE_SELECT_CLASS.test(parent.className)) {
|
72 | return;
|
73 | }
|
74 | }
|
75 |
|
76 | [this, getPartnerBrace(this)].forEach(function (ele) {
|
77 | ele.className = (ele.className.replace(BRACE_SELECTED_CLASS, ' ') + ' brace-selected').replace(/\s+/g, ' ');
|
78 | });
|
79 | }
|
80 |
|
81 | Prism.hooks.add('complete', function (env) {
|
82 |
|
83 |
|
84 | var code = env.element;
|
85 | var pre = code.parentElement;
|
86 |
|
87 | if (!pre || pre.tagName != 'PRE') {
|
88 | return;
|
89 | }
|
90 |
|
91 |
|
92 |
|
93 | var toMatch = [];
|
94 | for (var ele = code; ele; ele = ele.parentElement) {
|
95 | if (MATCH_ALL_CLASS.test(ele.className)) {
|
96 | toMatch.push('(', '[', '{');
|
97 | break;
|
98 | }
|
99 | }
|
100 |
|
101 | if (toMatch.length == 0) {
|
102 |
|
103 | return;
|
104 | }
|
105 |
|
106 | if (!pre.__listenerAdded) {
|
107 |
|
108 | pre.addEventListener('mousedown', function removeBraceSelected() {
|
109 |
|
110 | var code = pre.querySelector('code');
|
111 | Array.prototype.slice.call(code.querySelectorAll('.brace-selected')).forEach(function (element) {
|
112 | element.className = element.className.replace(BRACE_SELECTED_CLASS, ' ');
|
113 | });
|
114 | });
|
115 | Object.defineProperty(pre, '__listenerAdded', { value: true });
|
116 | }
|
117 |
|
118 |
|
119 | var punctuation = Array.prototype.slice.call(code.querySelectorAll('span.token.punctuation'));
|
120 |
|
121 |
|
122 | var allBraces = [];
|
123 |
|
124 | toMatch.forEach(function (open) {
|
125 | var close = PARTNER[open];
|
126 | var name = NAMES[open];
|
127 |
|
128 |
|
129 | var pairs = [];
|
130 |
|
131 | var openStack = [];
|
132 |
|
133 | for (var i = 0; i < punctuation.length; i++) {
|
134 | var element = punctuation[i];
|
135 | if (element.childElementCount == 0) {
|
136 | var text = element.textContent;
|
137 | if (text === open) {
|
138 | allBraces.push({ index: i, open: true, element: element });
|
139 | element.className += ' ' + name;
|
140 | element.className += ' brace-open';
|
141 | openStack.push(i);
|
142 | } else if (text === close) {
|
143 | allBraces.push({ index: i, open: false, element: element });
|
144 | element.className += ' ' + name;
|
145 | element.className += ' brace-close';
|
146 | if (openStack.length) {
|
147 | pairs.push([i, openStack.pop()]);
|
148 | }
|
149 | }
|
150 | }
|
151 | }
|
152 |
|
153 | pairs.forEach(function (pair) {
|
154 | var pairId = 'pair-' + (pairIdCounter++) + '-';
|
155 |
|
156 | var openEle = punctuation[pair[0]];
|
157 | var closeEle = punctuation[pair[1]];
|
158 |
|
159 | openEle.id = pairId + 'open';
|
160 | closeEle.id = pairId + 'close';
|
161 |
|
162 | [openEle, closeEle].forEach(function (ele) {
|
163 | ele.addEventListener('mouseenter', hoverBrace);
|
164 | ele.addEventListener('mouseleave', leaveBrace);
|
165 | ele.addEventListener('click', clickBrace);
|
166 | });
|
167 | });
|
168 | });
|
169 |
|
170 | var level = 0;
|
171 | allBraces.sort(function (a, b) { return a.index - b.index; });
|
172 | allBraces.forEach(function (brace) {
|
173 | if (brace.open) {
|
174 | brace.element.className += ' brace-level-' + (level % LEVEL_WARP + 1);
|
175 | level++;
|
176 | } else {
|
177 | level = Math.max(0, level - 1);
|
178 | brace.element.className += ' brace-level-' + (level % LEVEL_WARP + 1);
|
179 | }
|
180 | });
|
181 |
|
182 | });
|
183 |
|
184 | }());
|