894 lines
25 KiB
JavaScript
Executable file
894 lines
25 KiB
JavaScript
Executable file
"use strict";
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function Search(menu) {
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this.menu = menu;
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this.$search = document.getElementById('menu-search');
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this.$searchBox = document.getElementById('menu-search-box');
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this.$searchResults = document.getElementById('menu-search-results');
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this.loadBiblio();
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document.addEventListener('keydown', this.documentKeydown.bind(this));
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this.$searchBox.addEventListener('keydown', debounce(this.searchBoxKeydown.bind(this), { stopPropagation: true }));
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this.$searchBox.addEventListener('keyup', debounce(this.searchBoxKeyup.bind(this), { stopPropagation: true }));
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}
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Search.prototype.loadBiblio = function () {
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var $biblio = document.getElementById('menu-search-biblio');
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if (!$biblio) {
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this.biblio = [];
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} else {
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this.biblio = JSON.parse($biblio.textContent);
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this.biblio.clauses = this.biblio.filter(function (e) { return e.type === 'clause' });
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this.biblio.byId = this.biblio.reduce(function (map, entry) {
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map[entry.id] = entry;
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return map;
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}, {});
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}
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}
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Search.prototype.documentKeydown = function (e) {
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if (e.keyCode === 191) {
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e.preventDefault();
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e.stopPropagation();
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this.triggerSearch();
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}
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}
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Search.prototype.searchBoxKeydown = function (e) {
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e.stopPropagation();
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e.preventDefault();
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if (e.keyCode === 191 && e.target.value.length === 0) {
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e.preventDefault();
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} else if (e.keyCode === 13) {
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e.preventDefault();
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this.selectResult();
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}
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}
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Search.prototype.searchBoxKeyup = function (e) {
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if (e.keyCode === 13 || e.keyCode === 9) {
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return;
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}
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this.search(e.target.value);
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}
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Search.prototype.triggerSearch = function (e) {
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if (this.menu.isVisible()) {
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this._closeAfterSearch = false;
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} else {
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this._closeAfterSearch = true;
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this.menu.show();
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}
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this.$searchBox.focus();
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this.$searchBox.select();
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}
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// bit 12 - Set if the result starts with searchString
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// bits 8-11: 8 - number of chunks multiplied by 2 if cases match, otherwise 1.
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// bits 1-7: 127 - length of the entry
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// General scheme: prefer case sensitive matches with fewer chunks, and otherwise
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// prefer shorter matches.
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function relevance(result, searchString) {
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var relevance = 0;
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relevance = Math.max(0, 8 - result.match.chunks) << 7;
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if (result.match.caseMatch) {
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relevance *= 2;
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}
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if (result.match.prefix) {
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relevance += 2048
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}
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relevance += Math.max(0, 255 - result.entry.key.length);
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return relevance;
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}
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Search.prototype.search = function (searchString) {
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var s = Date.now();
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if (searchString === '') {
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this.displayResults([]);
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this.hideSearch();
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return;
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} else {
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this.showSearch();
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}
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if (searchString.length === 1) {
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this.displayResults([]);
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return;
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}
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var results;
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if (/^[\d\.]*$/.test(searchString)) {
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results = this.biblio.clauses.filter(function (clause) {
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return clause.number.substring(0, searchString.length) === searchString;
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}).map(function (clause) {
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return { entry: clause };
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});
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} else {
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results = [];
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for (var i = 0; i < this.biblio.length; i++) {
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var entry = this.biblio[i];
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if (!entry.key) {
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// biblio entries without a key aren't searchable
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continue;
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}
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var match = fuzzysearch(searchString, entry.key);
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if (match) {
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results.push({ entry: entry, match: match });
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}
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}
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results.forEach(function (result) {
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result.relevance = relevance(result, searchString);
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});
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results = results.sort(function (a, b) { return b.relevance - a.relevance });
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}
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if (results.length > 50) {
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results = results.slice(0, 50);
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}
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this.displayResults(results);
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}
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Search.prototype.hideSearch = function () {
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this.$search.classList.remove('active');
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}
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Search.prototype.showSearch = function () {
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this.$search.classList.add('active');
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}
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Search.prototype.selectResult = function () {
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var $first = this.$searchResults.querySelector('li:first-child a');
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if ($first) {
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document.location = $first.getAttribute('href');
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}
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this.$searchBox.value = '';
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this.$searchBox.blur();
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this.displayResults([]);
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this.hideSearch();
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if (this._closeAfterSearch) {
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this.menu.hide();
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}
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}
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Search.prototype.displayResults = function (results) {
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if (results.length > 0) {
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this.$searchResults.classList.remove('no-results');
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var html = '<ul>';
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results.forEach(function (result) {
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var entry = result.entry;
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var id = entry.id;
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var cssClass = '';
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var text = '';
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if (entry.type === 'clause') {
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var number = entry.number ? entry.number + ' ' : '';
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text = number + entry.key;
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cssClass = 'clause';
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id = entry.id;
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} else if (entry.type === 'production') {
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text = entry.key;
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cssClass = 'prod';
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id = entry.id;
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} else if (entry.type === 'op') {
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text = entry.key;
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cssClass = 'op';
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id = entry.id || entry.refId;
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} else if (entry.type === 'term') {
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text = entry.key;
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cssClass = 'term';
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id = entry.id || entry.refId;
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}
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if (text) {
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html += '<li class=menu-search-result-' + cssClass + '><a href="#' + id + '">' + text + '</a></li>'
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}
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});
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html += '</ul>'
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this.$searchResults.innerHTML = html;
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} else {
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this.$searchResults.innerHTML = '';
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this.$searchResults.classList.add('no-results');
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}
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}
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function Menu() {
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this.$toggle = document.getElementById('menu-toggle');
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this.$menu = document.getElementById('menu');
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this.$toc = document.querySelector('menu-toc > ol');
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this.$pins = document.querySelector('#menu-pins');
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this.$pinList = document.getElementById('menu-pins-list');
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this.$toc = document.querySelector('#menu-toc > ol');
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this.$specContainer = document.getElementById('spec-container');
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this.search = new Search(this);
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this._pinnedIds = {};
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this.loadPinEntries();
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// toggle menu
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this.$toggle.addEventListener('click', this.toggle.bind(this));
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// keydown events for pinned clauses
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document.addEventListener('keydown', this.documentKeydown.bind(this));
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// toc expansion
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var tocItems = this.$menu.querySelectorAll('#menu-toc li');
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for (var i = 0; i < tocItems.length; i++) {
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var $item = tocItems[i];
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$item.addEventListener('click', function($item, event) {
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$item.classList.toggle('active');
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event.stopPropagation();
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}.bind(null, $item));
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}
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// close toc on toc item selection
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var tocLinks = this.$menu.querySelectorAll('#menu-toc li > a');
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for (var i = 0; i < tocLinks.length; i++) {
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var $link = tocLinks[i];
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$link.addEventListener('click', function(event) {
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this.toggle();
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event.stopPropagation();
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}.bind(this));
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}
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// update active clause on scroll
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window.addEventListener('scroll', debounce(this.updateActiveClause.bind(this)));
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this.updateActiveClause();
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// prevent menu scrolling from scrolling the body
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this.$toc.addEventListener('wheel', function (e) {
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var target = e.currentTarget;
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var offTop = e.deltaY < 0 && target.scrollTop === 0;
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if (offTop) {
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e.preventDefault();
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}
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var offBottom = e.deltaY > 0
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&& target.offsetHeight + target.scrollTop >= target.scrollHeight;
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if (offBottom) {
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e.preventDefault();
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}
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})
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}
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Menu.prototype.documentKeydown = function (e) {
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e.stopPropagation();
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if (e.keyCode === 80) {
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this.togglePinEntry();
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} else if (e.keyCode > 48 && e.keyCode < 58) {
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this.selectPin(e.keyCode - 49);
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}
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}
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Menu.prototype.updateActiveClause = function () {
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this.setActiveClause(findActiveClause(this.$specContainer))
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}
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Menu.prototype.setActiveClause = function (clause) {
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this.$activeClause = clause;
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this.revealInToc(this.$activeClause);
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}
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Menu.prototype.revealInToc = function (path) {
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var current = this.$toc.querySelectorAll('li.revealed');
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for (var i = 0; i < current.length; i++) {
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current[i].classList.remove('revealed');
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current[i].classList.remove('revealed-leaf');
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}
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var current = this.$toc;
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var index = 0;
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while (index < path.length) {
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var children = current.children;
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for (var i = 0; i < children.length; i++) {
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if ('#' + path[index].id === children[i].children[1].getAttribute('href') ) {
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children[i].classList.add('revealed');
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if (index === path.length - 1) {
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children[i].classList.add('revealed-leaf');
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var rect = children[i].getBoundingClientRect();
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this.$toc.getBoundingClientRect().top
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var tocRect = this.$toc.getBoundingClientRect();
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if (rect.top + 10 > tocRect.bottom) {
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this.$toc.scrollTop = this.$toc.scrollTop + (rect.top - tocRect.bottom) + (rect.bottom - rect.top);
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} else if (rect.top < tocRect.top) {
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this.$toc.scrollTop = this.$toc.scrollTop - (tocRect.top - rect.top);
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}
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}
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current = children[i].querySelector('ol');
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index++;
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break;
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}
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}
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}
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}
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function findActiveClause(root, path) {
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var clauses = new ClauseWalker(root);
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var $clause;
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var found = false;
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var path = path || [];
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while ($clause = clauses.nextNode()) {
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var rect = $clause.getBoundingClientRect();
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var $header = $clause.children[0];
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var marginTop = parseInt(getComputedStyle($header)["margin-top"]);
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if ((rect.top - marginTop) <= 0 && rect.bottom > 0) {
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found = true;
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return findActiveClause($clause, path.concat($clause)) || path;
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}
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}
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return path;
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}
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function ClauseWalker(root) {
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var previous;
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var treeWalker = document.createTreeWalker(
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root,
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NodeFilter.SHOW_ELEMENT,
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{
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acceptNode: function (node) {
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if (previous === node.parentNode) {
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return NodeFilter.FILTER_REJECT;
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} else {
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previous = node;
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}
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if (node.nodeName === 'EMU-CLAUSE' || node.nodeName === 'EMU-INTRO' || node.nodeName === 'EMU-ANNEX') {
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return NodeFilter.FILTER_ACCEPT;
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} else {
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return NodeFilter.FILTER_SKIP;
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}
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}
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},
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false
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);
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return treeWalker;
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}
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Menu.prototype.toggle = function () {
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this.$menu.classList.toggle('active');
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}
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Menu.prototype.show = function () {
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this.$menu.classList.add('active');
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}
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Menu.prototype.hide = function () {
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this.$menu.classList.remove('active');
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}
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Menu.prototype.isVisible = function() {
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return this.$menu.classList.contains('active');
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}
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Menu.prototype.showPins = function () {
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this.$pins.classList.add('active');
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}
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Menu.prototype.hidePins = function () {
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this.$pins.classList.remove('active');
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}
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Menu.prototype.addPinEntry = function (id) {
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var entry = this.search.biblio.byId[id];
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if (!entry) {
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// id was deleted after pin (or something) so remove it
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delete this._pinnedIds[id];
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this.persistPinEntries();
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return;
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}
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if (entry.type === 'clause') {
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var prefix;
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if (entry.number) {
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prefix = entry.number + ' ';
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} else {
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prefix = '';
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}
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this.$pinList.innerHTML += '<li><a href="#' + entry.id + '">' + prefix + entry.titleHTML + '</a></li>';
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} else {
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this.$pinList.innerHTML += '<li><a href="#' + entry.id + '">' + entry.key + '</a></li>';
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}
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if (Object.keys(this._pinnedIds).length === 0) {
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this.showPins();
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}
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this._pinnedIds[id] = true;
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this.persistPinEntries();
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}
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Menu.prototype.removePinEntry = function (id) {
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var item = this.$pinList.querySelector('a[href="#' + id + '"]').parentNode;
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this.$pinList.removeChild(item);
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delete this._pinnedIds[id];
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if (Object.keys(this._pinnedIds).length === 0) {
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this.hidePins();
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}
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this.persistPinEntries();
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}
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Menu.prototype.persistPinEntries = function () {
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try {
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if (!window.localStorage) return;
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} catch (e) {
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return;
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}
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localStorage.pinEntries = JSON.stringify(Object.keys(this._pinnedIds));
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}
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Menu.prototype.loadPinEntries = function () {
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try {
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if (!window.localStorage) return;
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} catch (e) {
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return;
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}
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var pinsString = window.localStorage.pinEntries;
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if (!pinsString) return;
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var pins = JSON.parse(pinsString);
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for(var i = 0; i < pins.length; i++) {
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this.addPinEntry(pins[i]);
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}
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}
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Menu.prototype.togglePinEntry = function (id) {
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if (!id) {
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id = this.$activeClause[this.$activeClause.length - 1].id;
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}
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if (this._pinnedIds[id]) {
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this.removePinEntry(id);
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} else {
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this.addPinEntry(id);
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}
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}
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Menu.prototype.selectPin = function (num) {
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document.location = this.$pinList.children[num].children[0].href;
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}
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var menu;
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function init() {
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menu = new Menu();
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var $container = document.getElementById('spec-container');
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$container.addEventListener('mouseover', debounce(function (e) {
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Toolbox.activateIfMouseOver(e);
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}));
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}
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document.addEventListener('DOMContentLoaded', init);
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function debounce(fn, opts) {
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opts = opts || {};
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var timeout;
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return function(e) {
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if (opts.stopPropagation) {
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e.stopPropagation();
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}
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var args = arguments;
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if (timeout) {
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clearTimeout(timeout);
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}
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timeout = setTimeout(function() {
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timeout = null;
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fn.apply(this, args);
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}.bind(this), 150);
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}
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}
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var CLAUSE_NODES = ['EMU-CLAUSE', 'EMU-INTRO', 'EMU-ANNEX'];
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function findLocalReferences ($elem) {
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var name = $elem.innerHTML;
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var references = [];
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var parentClause = $elem.parentNode;
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while (parentClause && CLAUSE_NODES.indexOf(parentClause.nodeName) === -1) {
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parentClause = parentClause.parentNode;
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}
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if(!parentClause) return;
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var vars = parentClause.querySelectorAll('var');
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for (var i = 0; i < vars.length; i++) {
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var $var = vars[i];
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if ($var.innerHTML === name) {
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references.push($var);
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}
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}
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return references;
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}
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function toggleFindLocalReferences($elem) {
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var references = findLocalReferences($elem);
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if ($elem.classList.contains('referenced')) {
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references.forEach(function ($reference) {
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$reference.classList.remove('referenced');
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});
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} else {
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references.forEach(function ($reference) {
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$reference.classList.add('referenced');
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});
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}
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}
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function installFindLocalReferences () {
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document.addEventListener('click', function (e) {
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if (e.target.nodeName === 'VAR') {
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toggleFindLocalReferences(e.target);
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}
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});
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}
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document.addEventListener('DOMContentLoaded', installFindLocalReferences);
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// The following license applies to the fuzzysearch function
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// The MIT License (MIT)
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// Copyright © 2015 Nicolas Bevacqua
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// Copyright © 2016 Brian Terlson
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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function fuzzysearch (searchString, haystack, caseInsensitive) {
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var tlen = haystack.length;
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var qlen = searchString.length;
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var chunks = 1;
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var finding = false;
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var prefix = true;
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if (qlen > tlen) {
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return false;
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}
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if (qlen === tlen) {
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if (searchString === haystack) {
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return { caseMatch: true, chunks: 1, prefix: true };
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} else if (searchString.toLowerCase() === haystack.toLowerCase()) {
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return { caseMatch: false, chunks: 1, prefix: true };
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} else {
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return false;
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}
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}
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outer: for (var i = 0, j = 0; i < qlen; i++) {
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var nch = searchString[i];
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while (j < tlen) {
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var targetChar = haystack[j++];
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if (targetChar === nch) {
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finding = true;
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continue outer;
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}
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if (finding) {
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chunks++;
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finding = false;
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}
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}
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if (caseInsensitive) { return false }
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return fuzzysearch(searchString.toLowerCase(), haystack.toLowerCase(), true);
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}
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return { caseMatch: !caseInsensitive, chunks: chunks, prefix: j <= qlen };
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}
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var Toolbox = {
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init: function () {
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this.$container = document.createElement('div');
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this.$container.classList.add('toolbox');
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this.$permalink = document.createElement('a');
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this.$permalink.textContent = 'Permalink';
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this.$pinLink = document.createElement('a');
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this.$pinLink.textContent = 'Pin';
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this.$pinLink.setAttribute('href', '#');
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this.$pinLink.addEventListener('click', function (e) {
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e.preventDefault();
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e.stopPropagation();
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menu.togglePinEntry(this.entry.id);
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}.bind(this));
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this.$refsLink = document.createElement('a');
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this.$refsLink.setAttribute('href', '#');
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this.$refsLink.addEventListener('click', function (e) {
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e.preventDefault();
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e.stopPropagation();
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referencePane.showReferencesFor(this.entry);
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}.bind(this));
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this.$container.appendChild(this.$permalink);
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this.$container.appendChild(this.$pinLink);
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this.$container.appendChild(this.$refsLink);
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document.body.appendChild(this.$container);
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},
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activate: function (el, entry, target) {
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if (el === this._activeEl) return;
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this.active = true;
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this.entry = entry;
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this.$container.classList.add('active');
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this.top = el.offsetTop - this.$container.offsetHeight - 10;
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this.left = el.offsetLeft;
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this.$container.setAttribute('style', 'left: ' + this.left + 'px; top: ' + this.top + 'px');
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this.updatePermalink();
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this.updateReferences();
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this._activeEl = el;
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if (this.top < document.body.scrollTop && el === target) {
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// don't scroll unless it's a small thing (< 200px)
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this.$container.scrollIntoView();
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}
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},
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updatePermalink: function () {
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this.$permalink.setAttribute('href', '#' + this.entry.id);
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},
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updateReferences: function () {
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this.$refsLink.textContent = 'References (' + this.entry.referencingIds.length + ')';
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},
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activateIfMouseOver: function (e) {
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var ref = this.findReferenceUnder(e.target);
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if (ref && (!this.active || e.pageY > this._activeEl.offsetTop)) {
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var entry = menu.search.biblio.byId[ref.id];
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this.activate(ref.element, entry, e.target);
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} else if (this.active && ((e.pageY < this.top) || e.pageY > (this._activeEl.offsetTop + this._activeEl.offsetHeight))) {
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this.deactivate();
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}
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},
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findReferenceUnder: function (el) {
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while (el) {
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var parent = el.parentNode;
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if (el.nodeName === 'H1' && parent.nodeName.match(/EMU-CLAUSE|EMU-ANNEX|EMU-INTRO/) && parent.id) {
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return { element: el, id: parent.id };
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} else if (el.nodeName.match(/EMU-(?!CLAUSE|XREF|ANNEX|INTRO)|DFN/) &&
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el.id && el.id[0] !== '_') {
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if (el.nodeName === 'EMU-FIGURE' || el.nodeName === 'EMU-TABLE' || el.nodeName === 'EMU-EXAMPLE') {
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// return the figcaption element
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return { element: el.children[0].children[0], id: el.id };
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} else if (el.nodeName === 'EMU-PRODUCTION') {
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// return the LHS non-terminal element
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return { element: el.children[0], id: el.id };
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} else {
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return { element: el, id: el.id };
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}
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}
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el = parent;
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}
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},
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deactivate: function () {
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this.$container.classList.remove('active');
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this._activeEl = null;
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this.activeElBounds = null;
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this.active = false;
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}
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}
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var referencePane = {
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init: function() {
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this.$container = document.createElement('div');
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this.$container.setAttribute('id', 'references-pane-container');
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var $spacer = document.createElement('div');
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$spacer.setAttribute('id', 'references-pane-spacer');
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this.$pane = document.createElement('div');
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this.$pane.setAttribute('id', 'references-pane');
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this.$container.appendChild($spacer);
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this.$container.appendChild(this.$pane);
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this.$header = document.createElement('div');
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this.$header.classList.add('menu-pane-header');
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this.$header.textContent = 'References to ';
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this.$headerRefId = document.createElement('a');
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this.$header.appendChild(this.$headerRefId);
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this.$closeButton = document.createElement('span');
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this.$closeButton.setAttribute('id', 'references-pane-close');
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this.$closeButton.addEventListener('click', function (e) {
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this.deactivate();
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}.bind(this));
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this.$header.appendChild(this.$closeButton);
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this.$pane.appendChild(this.$header);
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var tableContainer = document.createElement('div');
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tableContainer.setAttribute('id', 'references-pane-table-container');
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this.$table = document.createElement('table');
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this.$table.setAttribute('id', 'references-pane-table');
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this.$tableBody = this.$table.createTBody();
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tableContainer.appendChild(this.$table);
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this.$pane.appendChild(tableContainer);
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menu.$specContainer.appendChild(this.$container);
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},
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activate: function () {
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this.$container.classList.add('active');
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},
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deactivate: function () {
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this.$container.classList.remove('active');
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},
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showReferencesFor(entry) {
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this.activate();
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var newBody = document.createElement('tbody');
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var previousId;
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var previousCell;
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var dupCount = 0;
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this.$headerRefId.textContent = '#' + entry.id;
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this.$headerRefId.setAttribute('href', '#' + entry.id);
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entry.referencingIds.map(function (id) {
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var target = document.getElementById(id);
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var cid = findParentClauseId(target);
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var clause = menu.search.biblio.byId[cid];
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var dupCount = 0;
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return { id: id, clause: clause }
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}).sort(function (a, b) {
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return sortByClauseNumber(a.clause, b.clause);
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}).forEach(function (record, i) {
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if (previousId === record.clause.id) {
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previousCell.innerHTML += ' (<a href="#' + record.id + '">' + (dupCount + 2) + '</a>)';
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dupCount++;
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} else {
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var row = newBody.insertRow();
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var cell = row.insertCell();
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cell.innerHTML = record.clause.number;
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cell = row.insertCell();
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cell.innerHTML = '<a href="#' + record.id + '">' + record.clause.titleHTML + '</a>';
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previousCell = cell;
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previousId = record.clause.id;
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dupCount = 0;
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}
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}, this);
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this.$table.removeChild(this.$tableBody);
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this.$tableBody = newBody;
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this.$table.appendChild(this.$tableBody);
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}
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}
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function findParentClauseId(node) {
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while (node && node.nodeName !== 'EMU-CLAUSE' && node.nodeName !== 'EMU-INTRO' && node.nodeName !== 'EMU-ANNEX') {
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node = node.parentNode;
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}
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if (!node) return null;
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return node.getAttribute('id');
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}
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function sortByClauseNumber(c1, c2) {
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var c1c = c1.number.split('.');
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var c2c = c2.number.split('.');
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for (var i = 0; i < c1c.length; i++) {
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if (i >= c2c.length) {
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return 1;
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}
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var c1 = c1c[i];
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var c2 = c2c[i];
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var c1cn = Number(c1);
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var c2cn = Number(c2);
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if (Number.isNaN(c1cn) && Number.isNaN(c2cn)) {
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if (c1 > c2) {
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return 1;
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} else if (c1 < c2) {
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return -1;
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}
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} else if (!Number.isNaN(c1cn) && Number.isNaN(c2cn)) {
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return -1;
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} else if (Number.isNaN(c1cn) && !Number.isNaN(c2cn)) {
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return 1;
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} else if(c1cn > c2cn) {
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return 1;
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} else if (c1cn < c2cn) {
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return -1;
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}
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}
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if (c1c.length === c2c.length) {
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return 0;
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}
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return -1;
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}
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document.addEventListener('DOMContentLoaded', function () {
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Toolbox.init();
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referencePane.init();
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})
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var CLAUSE_NODES = ['EMU-CLAUSE', 'EMU-INTRO', 'EMU-ANNEX'];
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function findLocalReferences ($elem) {
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var name = $elem.innerHTML;
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var references = [];
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var parentClause = $elem.parentNode;
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while (parentClause && CLAUSE_NODES.indexOf(parentClause.nodeName) === -1) {
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parentClause = parentClause.parentNode;
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}
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if(!parentClause) return;
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var vars = parentClause.querySelectorAll('var');
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for (var i = 0; i < vars.length; i++) {
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var $var = vars[i];
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if ($var.innerHTML === name) {
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references.push($var);
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}
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}
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return references;
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}
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function toggleFindLocalReferences($elem) {
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var references = findLocalReferences($elem);
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if ($elem.classList.contains('referenced')) {
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references.forEach(function ($reference) {
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$reference.classList.remove('referenced');
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});
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} else {
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references.forEach(function ($reference) {
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$reference.classList.add('referenced');
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});
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}
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}
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function installFindLocalReferences () {
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document.addEventListener('click', function (e) {
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if (e.target.nodeName === 'VAR') {
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toggleFindLocalReferences(e.target);
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}
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});
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}
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document.addEventListener('DOMContentLoaded', installFindLocalReferences);
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