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-rw-r--r--bg/ExternalLicenses.js34
1 files changed, 29 insertions, 5 deletions
diff --git a/bg/ExternalLicenses.js b/bg/ExternalLicenses.js
index 74692d7..0b2c911 100644
--- a/bg/ExternalLicenses.js
+++ b/bg/ExternalLicenses.js
@@ -35,13 +35,24 @@ let licensesByURL = new Map();
}
}
+let cachedHrefs = new Map();
+
var ExternalLicenses = {
+ purgeCache(tabId) {
+ cachedHrefs.delete(tabId);
+ },
+
async check(script) {
- let {url, tabId, frameId} = script;
+ let {url, tabId, frameId, documentUrl} = script;
+ let tabCache = cachedHrefs.get(tabId);
+ let frameCache = tabCache && tabCache.get(frameId);
+ let cache = frameCache && frameCache.get(documentUrl);
let scriptInfo = await browser.tabs.sendMessage(tabId, {
action: "checkLicensedScript",
- url
+ url,
+ cache,
}, {frameId});
+
if (!(scriptInfo && scriptInfo.licenseURLs.length)) {
return null;
}
@@ -65,12 +76,24 @@ var ExternalLicenses = {
/**
* moves / creates external license references before any script in the page
- * if needed, to have them ready when the first script load is triggered
+ * if needed, to have them ready when the first script load is triggered.
+ * It also caches the external licens href by page URL, to help not actually
+ * modify the rendered HTML but rather feed the content script on demand.
* Returns true if the document has been actually modified, false otherwise.
*/
- optimizeDocument(document) {
+ optimizeDocument(document, cachePointer) {
+ let cache = {};
+ let {tabId, frameId, documentUrl} = cachePointer;
+ let frameCache = cachedHrefs.get(tabId);
+ if (!frameCache) {
+ cachedHrefs.set(tabId, frameCache = new Map());
+ }
+ frameCache.set(frameId, new Map([[documentUrl, cache]]));
+
let link = document.querySelector(`link[rel="jslicense"], link[data-jslicense="1"], a[rel="jslicense"], a[data-jslicense="1"]`);
if (link) {
+ let href = link.getAttribute("href");
+ cache.webLabels = {href};
let move = () => !!document.head.insertBefore(link, document.head.firstChild);
if (link.parentNode === document.head) {
for (let node; node = link.previousElementSibling;) {
@@ -82,12 +105,13 @@ var ExternalLicenses = {
if (link.tagName.toUpperCase() === "A") {
let newLink = document.createElement("link");
newLink.rel = "jslicense";
- newLink.setAttribute("href", link.getAttribute("href"));
+ newLink.setAttribute("href", href);
link = newLink;
}
return move();
}
}
+
return false;
}
};