Issue 370 - Right-clicked element is removed independent of created filter

lib/storage/io.js

Index: lib/storage/io.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/lib/storage/io.js
@@ -0,0 +1,129 @@
+/*
+ * This file is part of Adblock Plus <http://adblockplus.org/>,
+ * Copyright (C) 2006-2014 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+//
+// No direct file system access, using LocalStorage API
+//
+
+var IO = exports.IO =
+{
+  _getFilePath: function(file)
+  {
+    if (file instanceof FakeFile)
+      return file.path;
+    else if ("spec" in file)
+      return file.spec;
+
+    throw new Error("Unexpected file type");
+  },
+
+  _setFileContents: function(path, contents, lastModified)
+  {
+    ext.storage[path] = contents;
+    ext.storage[path + "/lastModified"] = lastModified || 0;
+  },
+
+  lineBreak: "\n",
+
+  resolveFilePath: function(path)
+  {
+    return new FakeFile(path);
+  },
+
+  readFromFile: function(file, listener, callback, timeLineID)
+  {
+    var Utils = require("utils").Utils;
+    Utils.runAsync(function()
+    {
+      var path = this._getFilePath(file);
+      if (!(path in ext.storage))
+      {
+        callback(new Error("File doesn't exist"))
+        return;
+      }
+
+      var lines = ext.storage[path].split(/[\r\n]+/);
+      for (var i = 0; i < lines.length; i++)
+        listener.process(lines[i]);
+      listener.process(null);
+      callback(null);
+    }.bind(this));
+  },
+
+  writeToFile: function(file, data, callback, timeLineID)
+  {
+    var path = this._getFilePath(file);
+    this._setFileContents(path, data.join(this.lineBreak) + this.lineBreak, Date.now());
+
+    var Utils = require("utils").Utils;
+    Utils.runAsync(callback, null, null);
+  },
+
+  copyFile: function(fromFile, toFile, callback)
+  {
+    // Simply combine read and write operations
+    var data = [];
+    this.readFromFile(fromFile, {
+      process: function(line)
+      {
+        if (line !== null)
+          data.push(line);
+      }
+    }, function(e)
+    {
+      if (e)
+        callback(e);
+      else
+        this.writeToFile(toFile, data, callback);
+    }.bind(this));
+  },
+
+  renameFile: function(fromFile, newName, callback)
+  {
+    var path = this._getFilePath(fromFile);
+    if (!(path in ext.storage))
+    {
+      callback(new Error("File doesn't exist"))
+      return;
+    }
+
+    this._setFileContents(newName, ext.storage[path], ext.storage[path + "/lastModified"]);
+    this.removeFile(fromFile, callback);
+  },
+
+  removeFile: function(file, callback)
+  {
+    var path = this._getFilePath(file);
+    delete ext.storage[path];
+    delete ext.storage[path + "/lastModified"];
+    callback(null);
+  },
+
+  statFile: function(file, callback)
+  {
+    var path = this._getFilePath(file);
+
+    // This needs to use Utils.runAsync(), otherwise FilterStorage might
+    // initialize too early - see #337.
+    require("utils").Utils.runAsync(callback.bind(null, null, {
+      exists: path in ext.storage,
+      isDirectory: false,
+      isFile: true,
+      lastModified: parseInt(ext.storage[path + "/lastModified"], 10) || 0
+    }));
+  }
+};