}
function initSearch(rawSearchIndex) {
- const MAX_LEV_DISTANCE = 3;
const MAX_RESULTS = 200;
const NO_TYPE_FILTER = -1;
/**
* @param {QueryElement} elem - The element from the parsed query.
* @param {integer} defaultLev - This is the value to return in case there are no generics.
*
- * @return {integer} - Returns the best match (if any) or `MAX_LEV_DISTANCE + 1`.
+ * @return {integer} - Returns the best match (if any) or `maxLevDistance + 1`.
*/
- function checkGenerics(row, elem, defaultLev) {
+ function checkGenerics(row, elem, defaultLev, maxLevDistance) {
if (row.generics.length === 0) {
- return elem.generics.length === 0 ? defaultLev : MAX_LEV_DISTANCE + 1;
+ return elem.generics.length === 0 ? defaultLev : maxLevDistance + 1;
} else if (row.generics.length > 0 && row.generics[0].name === null) {
- return checkGenerics(row.generics[0], elem, defaultLev);
+ return checkGenerics(row.generics[0], elem, defaultLev, maxLevDistance);
}
// The names match, but we need to be sure that all generics kinda
// match as well.
elem_name = entry.name;
if (elem_name === "") {
// Pure generic, needs to check into it.
- if (checkGenerics(entry, elem, MAX_LEV_DISTANCE + 1) !== 0) {
- return MAX_LEV_DISTANCE + 1;
+ if (checkGenerics(entry, elem, maxLevDistance + 1, maxLevDistance) !== 0) {
+ return maxLevDistance + 1;
}
continue;
}
}
}
if (match === null) {
- return MAX_LEV_DISTANCE + 1;
+ return maxLevDistance + 1;
}
elems[match] -= 1;
if (elems[match] === 0) {
}
return 0;
}
- return MAX_LEV_DISTANCE + 1;
+ return maxLevDistance + 1;
}
/**
*
* @return {integer} - Returns a Levenshtein distance to the best match.
*/
- function checkIfInGenerics(row, elem) {
- let lev = MAX_LEV_DISTANCE + 1;
+ function checkIfInGenerics(row, elem, maxLevDistance) {
+ let lev = maxLevDistance + 1;
for (const entry of row.generics) {
- lev = Math.min(checkType(entry, elem, true), lev);
+ lev = Math.min(checkType(entry, elem, true, maxLevDistance), lev);
if (lev === 0) {
break;
}
* @param {boolean} literalSearch
*
* @return {integer} - Returns a Levenshtein distance to the best match. If there is
- * no match, returns `MAX_LEV_DISTANCE + 1`.
+ * no match, returns `maxLevDistance + 1`.
*/
- function checkType(row, elem, literalSearch) {
+ function checkType(row, elem, literalSearch, maxLevDistance) {
if (row.name === null) {
// This is a pure "generic" search, no need to run other checks.
if (row.generics.length > 0) {
- return checkIfInGenerics(row, elem);
+ return checkIfInGenerics(row, elem, maxLevDistance);
}
- return MAX_LEV_DISTANCE + 1;
+ return maxLevDistance + 1;
}
let lev = levenshtein(row.name, elem.name);
return 0;
}
}
- return MAX_LEV_DISTANCE + 1;
+ return maxLevDistance + 1;
} else if (elem.generics.length > 0) {
- return checkGenerics(row, elem, MAX_LEV_DISTANCE + 1);
+ return checkGenerics(row, elem, maxLevDistance + 1, maxLevDistance);
}
return 0;
} else if (row.generics.length > 0) {
}
// The name didn't match so we now check if the type we're looking for is inside
// the generics!
- lev = checkIfInGenerics(row, elem);
- // Now whatever happens, the returned distance is "less good" so we should mark
- // it as such, and so we add 0.5 to the distance to make it "less good".
- return lev + 0.5;
- } else if (lev > MAX_LEV_DISTANCE) {
+ lev = Math.min(lev, checkIfInGenerics(row, elem, maxLevDistance));
+ return lev;
+ } else if (lev > maxLevDistance) {
// So our item's name doesn't match at all and has generics.
//
// Maybe it's present in a sub generic? For example "f<A<B<C>>>()", if we're
// looking for "B<C>", we'll need to go down.
- return checkIfInGenerics(row, elem);
+ return checkIfInGenerics(row, elem, maxLevDistance);
} else {
// At this point, the name kinda match and we have generics to check, so
// let's go!
- const tmp_lev = checkGenerics(row, elem, lev);
- if (tmp_lev > MAX_LEV_DISTANCE) {
- return MAX_LEV_DISTANCE + 1;
+ const tmp_lev = checkGenerics(row, elem, lev, maxLevDistance);
+ if (tmp_lev > maxLevDistance) {
+ return maxLevDistance + 1;
}
// We compute the median value of both checks and return it.
return (tmp_lev + lev) / 2;
} else if (elem.generics.length > 0) {
// In this case, we were expecting generics but there isn't so we simply reject this
// one.
- return MAX_LEV_DISTANCE + 1;
+ return maxLevDistance + 1;
}
// No generics on our query or on the target type so we can return without doing
// anything else.
* @param {integer} typeFilter
*
* @return {integer} - Returns a Levenshtein distance to the best match. If there is no
- * match, returns `MAX_LEV_DISTANCE + 1`.
+ * match, returns `maxLevDistance + 1`.
*/
- function findArg(row, elem, typeFilter) {
- let lev = MAX_LEV_DISTANCE + 1;
+ function findArg(row, elem, typeFilter, maxLevDistance) {
+ let lev = maxLevDistance + 1;
if (row && row.type && row.type.inputs && row.type.inputs.length > 0) {
for (const input of row.type.inputs) {
if (!typePassesFilter(typeFilter, input.ty)) {
continue;
}
- lev = Math.min(lev, checkType(input, elem, parsedQuery.literalSearch));
+ lev = Math.min(
+ lev,
+ checkType(input, elem, parsedQuery.literalSearch, maxLevDistance)
+ );
if (lev === 0) {
return 0;
}
}
}
- return parsedQuery.literalSearch ? MAX_LEV_DISTANCE + 1 : lev;
+ return parsedQuery.literalSearch ? maxLevDistance + 1 : lev;
}
/**
* @param {integer} typeFilter
*
* @return {integer} - Returns a Levenshtein distance to the best match. If there is no
- * match, returns `MAX_LEV_DISTANCE + 1`.
+ * match, returns `maxLevDistance + 1`.
*/
- function checkReturned(row, elem, typeFilter) {
- let lev = MAX_LEV_DISTANCE + 1;
+ function checkReturned(row, elem, typeFilter, maxLevDistance) {
+ let lev = maxLevDistance + 1;
if (row && row.type && row.type.output.length > 0) {
const ret = row.type.output;
if (!typePassesFilter(typeFilter, ret_ty.ty)) {
continue;
}
- lev = Math.min(lev, checkType(ret_ty, elem, parsedQuery.literalSearch));
+ lev = Math.min(
+ lev,
+ checkType(ret_ty, elem, parsedQuery.literalSearch, maxLevDistance)
+ );
if (lev === 0) {
return 0;
}
}
}
- return parsedQuery.literalSearch ? MAX_LEV_DISTANCE + 1 : lev;
+ return parsedQuery.literalSearch ? maxLevDistance + 1 : lev;
}
- function checkPath(contains, ty) {
+ function checkPath(contains, ty, maxLevDistance) {
if (contains.length === 0) {
return 0;
}
- let ret_lev = MAX_LEV_DISTANCE + 1;
+ let ret_lev = maxLevDistance + 1;
const path = ty.path.split("::");
if (ty.parent && ty.parent.name) {
const length = path.length;
const clength = contains.length;
if (clength > length) {
- return MAX_LEV_DISTANCE + 1;
+ return maxLevDistance + 1;
}
for (let i = 0; i < length; ++i) {
if (i + clength > length) {
let aborted = false;
for (let x = 0; x < clength; ++x) {
const lev = levenshtein(path[i + x], contains[x]);
- if (lev > MAX_LEV_DISTANCE) {
+ if (lev > maxLevDistance) {
aborted = true;
break;
}
* following condition:
*
* * If it is a "literal search" (`parsedQuery.literalSearch`), then `lev` must be 0.
- * * If it is not a "literal search", `lev` must be <= `MAX_LEV_DISTANCE`.
+ * * If it is not a "literal search", `lev` must be <= `maxLevDistance`.
*
* The `results` map contains information which will be used to sort the search results:
*
* @param {integer} lev
* @param {integer} path_lev
*/
- function addIntoResults(results, fullId, id, index, lev, path_lev) {
- const inBounds = lev <= MAX_LEV_DISTANCE || index !== -1;
+ function addIntoResults(results, fullId, id, index, lev, path_lev, maxLevDistance) {
+ const inBounds = lev <= maxLevDistance || index !== -1;
if (lev === 0 || (!parsedQuery.literalSearch && inBounds)) {
if (results[fullId] !== undefined) {
const result = results[fullId];
elem,
results_others,
results_in_args,
- results_returned
+ results_returned,
+ maxLevDistance
) {
if (!row || (filterCrates !== null && row.crate !== filterCrates)) {
return;
const fullId = row.id;
const searchWord = searchWords[pos];
- const in_args = findArg(row, elem, parsedQuery.typeFilter);
- const returned = checkReturned(row, elem, parsedQuery.typeFilter);
+ const in_args = findArg(row, elem, parsedQuery.typeFilter, maxLevDistance);
+ const returned = checkReturned(row, elem, parsedQuery.typeFilter, maxLevDistance);
// path_lev is 0 because no parent path information is currently stored
// in the search index
- addIntoResults(results_in_args, fullId, pos, -1, in_args, 0);
- addIntoResults(results_returned, fullId, pos, -1, returned, 0);
+ addIntoResults(results_in_args, fullId, pos, -1, in_args, 0, maxLevDistance);
+ addIntoResults(results_returned, fullId, pos, -1, returned, 0, maxLevDistance);
if (!typePassesFilter(parsedQuery.typeFilter, row.ty)) {
return;
// No need to check anything else if it's a "pure" generics search.
if (elem.name.length === 0) {
if (row.type !== null) {
- lev = checkGenerics(row.type, elem, MAX_LEV_DISTANCE + 1);
+ lev = checkGenerics(row.type, elem, maxLevDistance + 1, maxLevDistance);
// path_lev is 0 because we know it's empty
- addIntoResults(results_others, fullId, pos, index, lev, 0);
+ addIntoResults(results_others, fullId, pos, index, lev, 0, maxLevDistance);
}
return;
}
if (elem.fullPath.length > 1) {
- path_lev = checkPath(elem.pathWithoutLast, row);
- if (path_lev > MAX_LEV_DISTANCE) {
+ path_lev = checkPath(elem.pathWithoutLast, row, maxLevDistance);
+ if (path_lev > maxLevDistance) {
return;
}
}
lev = levenshtein(searchWord, elem.pathLast);
- if (index === -1 && lev + path_lev > MAX_LEV_DISTANCE) {
+ if (index === -1 && lev + path_lev > maxLevDistance) {
return;
}
- addIntoResults(results_others, fullId, pos, index, lev, path_lev);
+ addIntoResults(results_others, fullId, pos, index, lev, path_lev, maxLevDistance);
}
/**
* @param {integer} pos - Position in the `searchIndex`.
* @param {Object} results
*/
- function handleArgs(row, pos, results) {
+ function handleArgs(row, pos, results, maxLevDistance) {
if (!row || (filterCrates !== null && row.crate !== filterCrates)) {
return;
}
function checkArgs(elems, callback) {
for (const elem of elems) {
// There is more than one parameter to the query so all checks should be "exact"
- const lev = callback(row, elem, NO_TYPE_FILTER);
+ const lev = callback(row, elem, NO_TYPE_FILTER, maxLevDistance);
if (lev <= 1) {
nbLev += 1;
totalLev += lev;
return;
}
const lev = Math.round(totalLev / nbLev);
- addIntoResults(results, row.id, pos, 0, lev, 0);
+ addIntoResults(results, row.id, pos, 0, lev, 0, maxLevDistance);
}
function innerRunQuery() {
let elem, i, nSearchWords, in_returned, row;
+ let queryLen = 0;
+ for (const elem of parsedQuery.elems) {
+ queryLen += elem.name.length;
+ }
+ for (const elem of parsedQuery.returned) {
+ queryLen += elem.name.length;
+ }
+ const maxLevDistance = Math.floor(queryLen / 3);
+
if (parsedQuery.foundElems === 1) {
if (parsedQuery.elems.length === 1) {
elem = parsedQuery.elems[0];
elem,
results_others,
results_in_args,
- results_returned
+ results_returned,
+ maxLevDistance
);
}
} else if (parsedQuery.returned.length === 1) {
elem = parsedQuery.returned[0];
for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) {
row = searchIndex[i];
- in_returned = checkReturned(row, elem, parsedQuery.typeFilter);
- addIntoResults(results_others, row.id, i, -1, in_returned);
+ in_returned = checkReturned(
+ row,
+ elem,
+ parsedQuery.typeFilter,
+ maxLevDistance
+ );
+ addIntoResults(results_others, row.id, i, -1, in_returned, maxLevDistance);
}
}
} else if (parsedQuery.foundElems > 0) {
for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) {
- handleArgs(searchIndex[i], i, results_others);
+ handleArgs(searchIndex[i], i, results_others, maxLevDistance);
}
}
}
*
* @return {boolean} - Whether the result is valid or not
*/
- function validateResult(name, path, keys, parent) {
+ function validateResult(name, path, keys, parent, maxLevDistance) {
if (!keys || !keys.length) {
return true;
}
(parent !== undefined && parent.name !== undefined &&
parent.name.toLowerCase().indexOf(key) > -1) ||
// lastly check to see if the name was a levenshtein match
- levenshtein(name, key) <= MAX_LEV_DISTANCE)) {
+ levenshtein(name, key) <= maxLevDistance)) {
return false;
}
}
projects / rust.git / commitdiff