76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
# File 'lib/asciidoctor/html/search.rb', line 76
def lunr_script
<<~JS
(function() {
const normalisePossessive = function (builder) {
// Define a pipeline function that removes apostrophe
const pipelineFunction = function (token) {
if(token.toString().endsWith('’s')) {
return token.update(() => token.toString().slice(0,-2));
} else {
return token;
}
}
// Register the pipeline function so the index can be serialised
lunr.Pipeline.registerFunction(pipelineFunction, 'normalisePossessive');
// Add the pipeline function to both the indexing pipeline and the
// searching pipeline
builder.pipeline.before(lunr.stemmer, pipelineFunction);
builder.searchPipeline.before(lunr.stemmer, pipelineFunction);
}
const resultsContainer = document.getElementById('search-results-container');
const nmatches = document.getElementById('search-nmatches');
const searchResults = document.getElementById('search-results');
const searchForm = document.getElementById('search-form');
const searchBox = document.getElementById('search-text');
const positionOverflow = 20;
const documents = #{search_json};
const idx = lunr(function() {
this.use(normalisePossessive);
this.ref('id');
this.field('text');
this.metadataWhitelist = ['position'];
documents.forEach(doc => {
this.add(doc);
});
});
function processSearchText(searchText) {
const results = idx.search(searchText).map(match => {
const doc = documents.find(d => d.id == match.ref);
const result = document.createElement('li');
result.classList.add('list-group-item');
const link = document.createElement('a');
const br = document.createElement('br');
link.setAttribute('href', match.ref);
link.innerHTML = doc.title;
result.append(link, br);
const metadata = match.matchData.metadata;
for(const term in metadata) {
const datum = metadata[term];
for(const type in datum) {
datum[type].position.forEach(pos => {
const start = pos[0];
const end = pos[0] + pos[1];
const text = doc[type];
const textMatch = text.substring(start, end);
const matchingText = document.createElement('mark');
const overflowLeft = document.createElement('span');
overflowLeft.classList.add('overflow-text-left');
const overflowRight = document.createElement('span');
overflowRight.classList.add('overflow-text-right');
let left = start - #{SEARCH_RESULT_OVERFLOW};
while(text[left] && text[left].trim() == text[left]) {
left--;
}
let right = end + #{SEARCH_RESULT_OVERFLOW};
while(text[right] && text[right].trim() == text[right]) {
right++;
}
let overflowRightText = text.substring(end, right);
if(overflowRightText.length > 0 && text[right - 1] != '.') {
overflowRightText += '… ';
} else {
overflowRightText += ' ';
}
overflowLeft.textContent = text.substring(left + 1, start);
matchingText.textContent = textMatch;
overflowRight.textContent = overflowRightText;
result.append(overflowLeft, matchingText, overflowRight);
});
}
}
return result;
});
searchResults.replaceChildren(...results);
const n = results.length;
nmatches.textContent = n == 1 ? (n + ' match') : (n + ' matches');
resultsContainer.classList.remove('hidden');
}
searchForm.addEventListener('submit', e => {
e.preventDefault();
const searchText = searchBox.value;
processSearchText(searchText);
});
addEventListener('load', () => {
searchBox.focus();
});
})();
JS
end
|