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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/* globals browser, module */
class Injections {
constructor(availableInjections, customFunctions) {
this.INJECTION_PREF = "perform_injections";
this._injectionsEnabled = true;
this._availableInjections = availableInjections;
this._activeInjections = new Map();
this._customFunctions = customFunctions;
}
bindAboutCompatBroker(broker) {
this._aboutCompatBroker = broker;
}
bootup() {
browser.aboutConfigPrefs.onPrefChange.addListener(() => {
this.checkInjectionPref();
}, this.INJECTION_PREF);
this.checkInjectionPref();
}
checkInjectionPref() {
browser.aboutConfigPrefs.getPref(this.INJECTION_PREF).then(value => {
if (value === undefined) {
browser.aboutConfigPrefs.setPref(this.INJECTION_PREF, true);
} else if (value === false) {
this.unregisterContentScripts();
} else {
this.registerContentScripts();
}
});
}
getAvailableInjections() {
return this._availableInjections;
}
isEnabled() {
return this._injectionsEnabled;
}
async registerContentScripts() {
const platformInfo = await browser.runtime.getPlatformInfo();
const platformMatches = [
"all",
platformInfo.os,
platformInfo.os == "android" ? "android" : "desktop",
];
for (const injection of this._availableInjections) {
if (platformMatches.includes(injection.platform)) {
injection.availableOnPlatform = true;
await this.enableInjection(injection);
}
}
this._injectionsEnabled = true;
this._aboutCompatBroker.portsToAboutCompatTabs.broadcast({
interventionsChanged: this._aboutCompatBroker.filterOverrides(
this._availableInjections
),
});
}
assignContentScriptDefaults(contentScripts) {
let finalConfig = Object.assign({}, contentScripts);
if (!finalConfig.runAt) {
finalConfig.runAt = "document_start";
}
return finalConfig;
}
async enableInjection(injection) {
if (injection.active) {
return undefined;
}
if (injection.customFunc) {
return this.enableCustomInjection(injection);
}
return this.enableContentScripts(injection);
}
enableCustomInjection(injection) {
if (injection.customFunc in this._customFunctions) {
this._customFunctions[injection.customFunc](injection);
injection.active = true;
} else {
console.error(
`Provided function ${injection.customFunc} wasn't found in functions list`
);
}
}
async enableContentScripts(injection) {
try {
const handle = await browser.contentScripts.register(
this.assignContentScriptDefaults(injection.contentScripts)
);
this._activeInjections.set(injection, handle);
injection.active = true;
} catch (ex) {
console.error(
"Registering WebCompat GoFaster content scripts failed: ",
ex
);
}
}
unregisterContentScripts() {
for (const injection of this._availableInjections) {
this.disableInjection(injection);
}
this._injectionsEnabled = false;
this._aboutCompatBroker.portsToAboutCompatTabs.broadcast({
interventionsChanged: false,
});
}
async disableInjection(injection) {
if (!injection.active) {
return undefined;
}
if (injection.customFunc) {
return this.disableCustomInjections(injection);
}
return this.disableContentScripts(injection);
}
disableCustomInjections(injection) {
const disableFunc = injection.customFunc + "Disable";
if (disableFunc in this._customFunctions) {
this._customFunctions[disableFunc](injection);
injection.active = false;
} else {
console.error(
`Provided function ${disableFunc} for disabling injection wasn't found in functions list`
);
}
}
async disableContentScripts(injection) {
const contentScript = this._activeInjections.get(injection);
await contentScript.unregister();
this._activeInjections.delete(injection);
injection.active = false;
}
}
module.exports = Injections;
|
