113 lines
3.6 KiB
JavaScript
113 lines
3.6 KiB
JavaScript
function doSearch() {
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// Get the search terms from the input text box
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let terms = document.getElementById("ptxsearch").value;
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// Where do we want to put the results?
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let resultArea = document.getElementById("searchresults")
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resultArea.innerHTML = ""; // clear out any previous results
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// do the search using the provided index
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let pageResult = ptx_lunr_idx.search(terms);
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// Number the documents from first to last so we can order the results by their
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// position in the book.
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snum = 0;
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for (let doc of ptx_lunr_docs) {
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doc.snum = snum;
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snum += 1;
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}
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// Transfer meta data from the document to the results to make it easy to add
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// our lists later.
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augmentResults(pageResult, ptx_lunr_docs);
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addResultToPage(pageResult, ptx_lunr_docs, resultArea);
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MathJax.typeset();
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}
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// Find the entry for a search result in the original document index
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function findEntry(resultId, db) {
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for (const page of db) {
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if (page.id === resultId) {
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return page;
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}
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}
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return resultId;
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}
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function augmentResults(result, docs) {
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for (let res of result) {
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let info = findEntry(res.ref, docs);
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res.number = info.number;
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res.type = info.type;
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res.title = info.title;
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res.url = info.url;
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res.level = info.level;
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res.snum = info.snum;
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}
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}
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function comparePosition(a, b) {
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if (a.snum < b.snum) {
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return -1;
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}
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if (a.snum > b.snum) {
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return 1;
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}
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return 0;
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}
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function addResultToPage(result, docs, resultArea) {
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let len = result.length
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let high = result[Math.floor(len*0.25)].score;
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let med = result[Math.floor(len*0.5)].score;
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let low = result[Math.floor(len*0.75)].score;
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// sort the results by their position in the book, not their score
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result = result.sort(comparePosition)
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let indent = "1";
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let currIndent = indent;
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let origResult = resultArea;
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// Create list entries indenting as needed.
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for (const res of result) {
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let link = document.createElement("a")
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// add a class so we can colorize the results based on their rank in terms
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// of search score.
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if (res.score >= high) {
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link.classList.add("high_result")
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} else if (res.score >= med) {
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link.classList.add("medium_result")
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} else if (res.score >= low) {
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link.classList.add("low_result")
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}
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currIndent = res.level;
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if (currIndent > indent) {
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indent = currIndent;
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let ilist = document.createElement("ul")
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ilist.classList.add("detailed_result");
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resultArea.appendChild(ilist);
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resultArea = ilist;
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} else if (currIndent < indent) {
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resultArea = origResult;
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indent = currIndent;
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}
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let bullet = document.createElement("li")
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bullet.style.marginTop = "5px";
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link.href = `${res.url}`;
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link.innerHTML = `${res.type} ${res.number} ${res.title}`;
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bullet.appendChild(link)
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let p = document.createElement("text");
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p.innerHTML = ` (${res.score.toFixed(2)})`;
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bullet.appendChild(p);
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resultArea.appendChild(bullet);
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}
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}
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function showHelp() {
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let state = document.getElementById("helpme").style.display;
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if (state == "none") {
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document.getElementById("helpme").style.display = "block";
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document.getElementById("helpbutt").innerHTML = "Hide Help"
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} else {
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document.getElementById("helpme").style.display = "none";
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document.getElementById("helpbutt").innerHTML = "Show Help"
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}
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}
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