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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(DEFAULT, MARKER) {
this.config.DEFAULT = DEFAULT;
if(!this.config.CURRENT) this.config.CURRENT = DEFAULT;
// ugly hack: since now we use registerContentScript instead of the
// filterRequest dynamic script injection hack, we use top.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
this.config.MARKER = MARKER;
let eraseTabInfoRx = new RegExp(`[^]*${MARKER},?`);
if (eraseTabInfoRx.test(top.name)) {
let _name = top.name;
let tabInfoRx = new RegExp(`^${MARKER}\\[([^]*?)\\]${MARKER},`);
if (top === window) { // wrap to hide
Reflect.defineProperty(top.wrappedJSObject, "name", {
get: exportFunction(() => top.name.replace(eraseTabInfoRx, ""), top.wrappedJSObject),
set: exportFunction(value => {
let preamble = top.name.match(tabInfoRx);
top.name = `${preamble && preamble[0] || ""}${value}`;
return value;
}, top.wrappedJSObject)
});
}
let tabInfoMatch = _name.match(tabInfoRx);
if (tabInfoMatch) try {
this.config.tabInfo = JSON.parse(tabInfoMatch[1]);
} catch (e) {
error(e);
}
}
if (!this.config.DEFAULT || this.config.tabInfo.unrestricted) {
this.allows = () => true;
this.capabilities = Object.assign(
new Set(["script"]), { has() { return true; } });
} else {
let perms = this.config.CURRENT;
this.capabilities = new Set(perms.capabilities);
new DocumentCSP(document).apply(this.capabilities, this.embeddingDocument);
}
this.canScript = this.allows("script");
this.fire("capabilities");
},
config: { DEFAULT: null, CURRENT: null, tabInfo: {}, MARKER: "" },
allows(cap) {
return this.capabilities && this.capabilities.has(cap);
},
getWindowName() {
let marker = this.config.MARKER;
return (top === window && marker) ?
window.name.split(`${marker},`).pop()
: window.name;
}
};
if (this.ns) {
this.ns.merge(ns);
} else {
this.ns = ns;
}
}
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