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'use strict';
{
let listenersMap = new Map();
let backlog = new Set();
let ns = {
debug: true, // DEV_ONLY
get embeddingDocument() {
delete this.embeddingDocument;
return this.embeddingDocument = CSP.isEmbedType(document.contentType);
},
on(eventName, listener) {
let listeners = listenersMap.get(eventName);
if (!listeners) listenersMap.set(eventName, listeners = new Set());
listeners.add(listener);
if (backlog.has(eventName)) this.fire(eventName, listener);
},
detach(eventName, listener) {
let listeners = listenersMap.get(eventName);
if (listeners) listeners.delete(listener);
},
fire(eventName, listener = null) {
if (listener) {
listener({type:eventName, source: this});
return;
}
let listeners = listenersMap.get(eventName);
if (listeners) {
for (let l of listeners) {
this.fire(eventName, l);
}
}
backlog.add(eventName);
},
setup(permissions, MARKER) {
this.config.permissions = permissions;
// ugly hack: since now we use registerContentScript instead of the
// filterRequest dynamic script injection hack, we use window.name
// to store per-tab information. We don't want web content to
// mess with it, though, so we wrap it around auto-hiding accessors
if (this.config.MARKER = MARKER) {
let tabInfoRx = new RegExp(`^${MARKER}\\[([^]*?)\\]${MARKER},`);
let name = window.name;
try {
name = top.name;
} catch(e) {
// won't work cross-origin
}
let tabInfoMatch = name.match(tabInfoRx);
if (tabInfoMatch) {
try {
this.config.tabInfo = JSON.parse(tabInfoMatch[1]);
} catch (e) {
error(e);
}
}
let splitter = `${MARKER},`;
this.getWindowName = () => window.name.split(splitter).pop();
Reflect.defineProperty(window.wrappedJSObject, "name", {
get: exportFunction(() => this.getWindowName(), window.wrappedJSObject),
set: exportFunction(value => {
let tabInfoMatch = window.name.match(tabInfoRx);
window.name = tabInfoMatch ? `${tabInfoMatch[0]}${value}` : value;
return value;
}, window.wrappedJSObject)
});
}
if (!this.config.permissions || this.config.tabInfo.unrestricted) {
debug("%s is loading unrestricted by user's choice (%o).", document.URL, this.config);
this.allows = () => true;
this.capabilities = Object.assign(
new Set(["script"]), { has() { return true; } });
} else {
let perms = this.config.permissions;
this.capabilities = new Set(perms.capabilities);
new DocumentCSP(document).apply(this.capabilities, this.embeddingDocument);
}
this.canScript = this.allows("script");
this.fire("capabilities");
},
config: { permissions: null, tabInfo: {}, MARKER: "" },
allows(cap) {
return this.capabilities && this.capabilities.has(cap);
},
getWindowName() {
return window.name;
}
};
if (this.ns) {
this.ns.merge(ns);
} else {
this.ns = ns;
}
}
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