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Merge pull request greatsuspender#1238 from greatsuspender/screenshot…
…_overhaul Screenshot overhaul
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| var gsCleanScreencaps = { | ||
| // this will be filled with domain entries for O(1) lookups during screencaps | ||
| blacklist: {}, | ||
|
|
||
| // listeners for request coming from a tab that is being suspended | ||
| listeners: {}, | ||
|
|
||
| // load blacklist on initialization if option is enabled | ||
| initAsPromised: async ()=> | ||
| { | ||
| const useCleanScreencap = gsStorage.getOption( | ||
| gsStorage.ENABLE_CLEAN_SCREENCAPS | ||
| ); | ||
|
|
||
| if (useCleanScreencap) { | ||
| await gsCleanScreencaps.loadList() | ||
| } | ||
|
|
||
| return; | ||
| }, | ||
|
|
||
| addListener: (tabId) => { | ||
| // remove a listener if there is already one present. That might not be the case, but the function checks for that case. | ||
| gsCleanScreencaps.removeListener(tabId); | ||
|
|
||
| const listener = (details) => { | ||
| try { | ||
| const host = new URL(details.url).host | ||
| if (gsCleanScreencaps.blacklist[host]) { return { cancel: true }; } | ||
| } catch (err) { | ||
| gsUtils.log('background', 'error while trying to block in gsCleanScreencaps', err) | ||
| } | ||
| } | ||
|
|
||
| chrome.webRequest.onBeforeRequest.addListener( | ||
| listener, | ||
| { urls: ["<all_urls>"], types: ['image'], tabId: tabId }, | ||
| ["blocking"] | ||
| ); | ||
|
|
||
| // place a callback that will remove the listener as soon as the suspension | ||
| // of the tab succeeded or failed | ||
| gsCleanScreencaps.listeners[tabId] = () => chrome.webRequest.onBeforeRequest.removeListener(listener) | ||
| }, | ||
|
|
||
| // call the remove listener func and remove it from the hashmap | ||
| removeListener: (tabId) => { | ||
| let tmp; | ||
| if (tmp = gsCleanScreencaps.listeners[tabId]) { | ||
| delete gsCleanScreencaps[tabId]; | ||
| tmp(); | ||
| } | ||
| }, | ||
|
|
||
| // do nothing but get the data out of the chrome.local.storage | ||
| storageData: () => { | ||
| return new Promise((res, _) => { | ||
| chrome.storage.local.get('gsCleanScreencapsBlacklist', (storage) => res(storage.gsCleanScreencapsBlacklist)) | ||
| }) | ||
| }, | ||
|
|
||
| loadList: async () => { | ||
| const stored = await gsCleanScreencaps.storageData(); | ||
| // take the blocklist out of storage if it's not existent or newer than 30 days | ||
| if (!stored || stored.time + (3600 * 24 * 30) <= new Date().getTime()) { | ||
| const rex = /^0.0.0.0 (.*)(?:$|#)/ | ||
| let resp = await fetch('https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts').then(resp => resp.text()) | ||
| let m; | ||
|
|
||
| try { | ||
| const blockedHosts = resp | ||
| .split(/\n/) | ||
| .reduce((res, e) => { | ||
| if (m = rex.exec(e)) { | ||
| res[m[1]] = true; | ||
| } | ||
| return res; | ||
| }, {}); | ||
|
|
||
| gsCleanScreencaps.blacklist = blockedHosts; | ||
| chrome.storage.local.set({ gsCleanScreencapsBlacklist: { time: new Date().getTime(), blockedHosts } }) | ||
| return blockedHosts; | ||
| } catch (err) { | ||
| gsUtils.log('background', 'error while loading blocklist for clean screencapture:', err) | ||
| } | ||
| } else { | ||
| gsCleanScreencaps.blacklist = stored.blockedHosts; | ||
| return stored; | ||
| } | ||
| } | ||
| } |
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