Implementing @match-rules in userscripts

--HG--
branch : scripts

1 files changed, 42 insertions, 2 deletions

diff --git a/scripts/lib/extensions.js b/scripts/lib/extensions.js
index 2e6d163e..339803e5 100644
--- a/scripts/lib/extensions.js
+++ b/scripts/lib/extensions.js
@@ -1,5 +1,6 @@
 (function () {
   var _config = undefined;
+  var _debug = false;
   function getPlugin(name, filename) {
     var ret = null;
     try {
@@ -12,15 +13,54 @@
     }
     return ret;
   }
+  function getStack(offset) {
+    if (arguments.length === 0) {
+      offset = 0;
+    }
+    try {
+      throw Error (message);
+    }
+    catch (e) {
+      var stack = e.stack.match(/[^\n]+/g);
+      return "STACK: [" + stack.slice(offset+1).join("] [")+"]";
+    }
+  }
   Object.defineProperties(extensions, { 
     "warning" : {
       value : function (name, message) {
         io.print("\033[1mDWB EXTENSION WARNING: \033[0mextension  \033[1m" + name + "\033[0m: " + message, "stderr");
       }
     }, 
-    "error" : {
+    "enableDebugging" : {
+      set : function (value) {
+        if (typeof value == "boolean")
+          _debug = value;
+      }
+    },
+    "debug" : {
       value : function (name, message) {
-        io.print("\033[31mDWB EXTENSION ERROR: \033[0mextension \033[1m" + name + "\033[0m: " + message, "stderr");
+        if (_debug) {
+          io.print("\033[1mDWB EXTENSION DEBUG: \033[0mextension  \033[1m" + name + "\033[0m\n" + getStack(1), "stderr");
+        }
+      }
+    }, 
+    "error" : {
+      value : function (name, a, b) {
+        var message = "";
+        if (a instanceof Error) {
+          if (a.message) {
+            message = a.message;
+          }
+          else if (arguments.length > 2)
+            message = b;
+          else 
+            b = "";
+          io.print("\033[31mDWB EXTENSION ERROR: \033[0mextension \033[1m" + name + "\033[0m in line " + a.line + ": " + 
+              message + "\nSTACK: [" + a.stack.match(/[^\n]+/g).join("] [") + "]", "stderr");
+        }
+        else {
+          io.print("\033[31mDWB EXTENSION ERROR: \033[0mextension \033[1m" + name + "\033[0m: " + a + "\n" + getStack(1), "stderr");
+        }
       }
     },
     "message" : {