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simplify/modularize getApplicableSections

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tophf 2017-04-14 00:44:23 +03:00
parent 8f784a19d4
commit db1dc0df7b
1 changed files with 76 additions and 74 deletions
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150
storage.js
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@ -246,88 +246,90 @@ function deleteStyle({id, notify = true}) {
function getApplicableSections({style, matchUrl, strictRegexp = true, stopOnFirst}) {
//let t0 = 0;
if (!matchUrl.startsWith('http')
&& !matchUrl.startsWith('ftp')
&& !matchUrl.startsWith('file')
&& !matchUrl.startsWith(URLS.ownOrigin)) {
return [];
}
const sections = [];
checkingSections:
for (const section of style.sections) {
andCollect:
do {
// only http, https, file, ftp, and chrome-extension://OWN_EXTENSION_ID allowed
if (!matchUrl.startsWith('http')
&& !matchUrl.startsWith('ftp')
&& !matchUrl.startsWith('file')
&& !matchUrl.startsWith(URLS.ownOrigin)) {
continue checkingSections;
}
if (section.urls.length == 0
&& section.domains.length == 0
&& section.urlPrefixes.length == 0
&& section.regexps.length == 0) {
break andCollect;
}
if (section.urls.indexOf(matchUrl) != -1) {
break andCollect;
}
for (const urlPrefix of section.urlPrefixes) {
if (matchUrl.startsWith(urlPrefix)) {
break andCollect;
}
}
if (section.domains.length) {
const urlDomains = cachedStyles.urlDomains.get(matchUrl) || getDomains(matchUrl);
for (const domain of urlDomains) {
if (section.domains.indexOf(domain) != -1) {
break andCollect;
}
}
}
for (const regexp of section.regexps) {
for (let pass = 1; pass <= (strictRegexp ? 1 : 2); pass++) {
const cacheKey = pass == 1 ? regexp : SLOPPY_REGEXP_PREFIX + regexp;
let rx = cachedStyles.regexps.get(cacheKey);
if (rx == false) {
// invalid regexp
break;
}
if (!rx) {
const anchored = pass == 1 ? '^(?:' + regexp + ')$' : '^' + regexp + '$';
rx = tryRegExp(anchored);
cachedStyles.regexps.set(cacheKey, rx || false);
if (!rx) {
// invalid regexp
break;
}
}
if (rx.test(matchUrl)) {
break andCollect;
}
}
}
continue checkingSections;
} while (0);
// Collect the section if not empty or namespace-only.
// We don't check long code as it's slow both for emptyCode declared as Object
// and as Map in case the string is not the same reference used to add the item
//const t0start = performance.now();
const code = section.code;
let isEmpty = code !== null && code.length < 1000 && cachedStyles.emptyCode.get(code);
if (isEmpty === undefined) {
isEmpty = !code || !code.trim()
|| code.indexOf('@namespace') >= 0
&& code.replace(RX_CSS_COMMENTS, '').replace(RX_NAMESPACE, '').trim() == '';
cachedStyles.emptyCode.set(code, isEmpty);
}
//t0 += performance.now() - t0start;
if (!isEmpty) {
const {urls, domains, urlPrefixes, regexps, code} = section;
if ((!urls.length && !urlPrefixes.length && !domains.length && !regexps.length
|| urls.length && urls.indexOf(matchUrl) >= 0
|| urlPrefixes.length && arraySomeIsPrefix(urlPrefixes, matchUrl)
|| domains.length && arraySomeIn(cachedStyles.urlDomains.get(matchUrl) || getDomains(matchUrl), domains)
|| regexps.length && arraySomeMatches(regexps, matchUrl, strictRegexp)
) && !styleCodeEmpty(code)) {
sections.push(section);
if (stopOnFirst) {
//t0 >= 0.1 && console.debug('%s emptyCode', t0.toFixed(1)); // eslint-disable-line no-unused-expressions
return sections;
break;
}
}
}
//t0 >= 0.1 && console.debug('%s emptyCode', t0.toFixed(1)); // eslint-disable-line no-unused-expressions
return sections;
function arraySomeIsPrefix(array, string) {
for (const prefix of array) {
if (string.startsWith(prefix)) {
return true;
}
}
return false;
}
function arraySomeIn(array, haystack) {
for (const el of array) {
if (haystack.indexOf(el) >= 0) {
return true;
}
}
return false;
}
function arraySomeMatches(array, matchUrl, strictRegexp) {
for (const regexp of array) {
for (let pass = 1; pass <= (strictRegexp ? 1 : 2); pass++) {
const cacheKey = pass == 1 ? regexp : SLOPPY_REGEXP_PREFIX + regexp;
let rx = cachedStyles.regexps.get(cacheKey);
if (rx == false) {
// invalid regexp
break;
}
if (!rx) {
const anchored = pass == 1 ? '^(?:' + regexp + ')$' : '^' + regexp + '$';
rx = tryRegExp(anchored);
cachedStyles.regexps.set(cacheKey, rx || false);
if (!rx) {
// invalid regexp
break;
}
}
if (rx.test(matchUrl)) {
return true;
}
}
}
return false;
}
}
function styleCodeEmpty(code) {
// Collect the section if not empty or namespace-only.
// We don't check long code as it's slow both for emptyCode declared as Object
// and as Map in case the string is not the same reference used to add the item
let isEmpty = code !== null &&
code.length < 1000 &&
cachedStyles.emptyCode.get(code);
if (isEmpty !== undefined) {
return isEmpty;
}
isEmpty = !code || !code.trim()
|| code.indexOf('@namespace') >= 0
&& code.replace(RX_CSS_COMMENTS, '').replace(RX_NAMESPACE, '').trim() == '';
cachedStyles.emptyCode.set(code, isEmpty);
return isEmpty;
}