1 files changed, 99 insertions, 0 deletions
diff --git a/src/content/staticNS.js b/src/content/staticNS.js
new file mode 100644
index 0000000..817351a
--- /dev/null
+++ b/src/content/staticNS.js
@@ -0,0 +1,99 @@
+'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;
+  }
+}