1 /* ***** BEGIN LICENSE BLOCK *****
2 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3 *
4 * The contents of this file are subject to the Mozilla Public License Version
5 * 1.1 (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
7 * http://www.mozilla.org/MPL/
8 *
9 * Software distributed under the License is distributed on an "AS IS" basis,
10 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11 * for the specific language governing rights and limitations under the
12 * License.
13 *
14 * The Initial Developer of the Original Code is Fireinput Inc.
15 *
16 * Portions created by the Initial Developer are Copyright (C) 2007
17 * the Initial Developer. All Rights Reserved.
18 *
19 * Contributor(s):
20 * Olly Ja <ollyja@gmail.com>
21 *
22 * Alternatively, the contents of this file may be used under the terms of
23 * either the GNU General Public License Version 2 or later (the "GPL"), or
24 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
25 * in which case the provisions of the GPL or the LGPL are applicable instead
26 * of those above. If you wish to allow use of your version of this file only
27 * under the terms of either the GPL or the LGPL, and not to allow others to
28 * use your version of this file under the terms of the MPL, indicate your
29 * decision by deleting the provisions above and replace them with the notice
30 * and other provisions required by the GPL or the LGPL. If you do not delete
31 * the provisions above, a recipient may use your version of this file under
32 * the terms of any one of the MPL, the GPL or the LGPL.
33 *
34 * ***** END LICENSE BLOCK *****
35 */
36
37 var FireinputLongTableSaver =
38 {
39
40 init: function()
41 {
42 var ios = FireinputXPC.getIOService();
43 var fileHandler = ios.getProtocolHandler("file")
44 .QueryInterface(Components.interfaces.nsIFileProtocolHandler);
45
46 var path = FireinputUtils.getAppRootPath() + "/userlargetable.fireinput";
47 var datafile = fileHandler.getFileFromURLSpec(path);
48 return datafile;
49 },
50
51
52 save: function()
53 {
54 var args = arguments;
55
56 if(!args || args.length <= 0)
57 return;
58
59 // FIXME: the backfile is required for safe writing
60
61 var fos = Components.classes["@mozilla.org/network/file-output-stream;1"]
62 .createInstance(Components.interfaces.nsIFileOutputStream);
63
64 var file = this.init();
65 // use 0x02 | 0x10 to open file for appending.
66 // write, create, truncate
67 fos.init(file, 0x02 | 0x08 | 0x20, 0664, 0);
68
69 var charset = "UTF-8";
70 var cos = Components.classes["@mozilla.org/intl/converter-output-stream;1"]
71 .createInstance(Components.interfaces.nsIConverterOutputStream);
72
73 // This assumes that fos is the nsIOutputStream you want to write to
74 cos.init(fos, charset, 0, 0x0000);
75
76 var self = this;
77
78 // if the user saved list is growing up quickly, the filter needs to be enable to remove
79 // the less frequent long tables
80 for(var i=args.length-1; i>=0; i--)
81 {
82 if(!args[i])
83 continue;
84 // the mininum list we keep is to have 500 entries
85 var filter = parseInt(args[i].length/500) -1;
86 filter = filter > 0 ? filter : 0;
87
88 var wStr = [];
89 args[i].foreach(function(key, value) {
90 var compactStr = self.getString(key, value, filter);
91 if(compactStr)
92 wStr[wStr.length] = compactStr;
93
94 if(wStr.length >= 20)
95 {
96 cos.writeString(wStr.join(""));
97 wStr.length = 0;
98 }
99 });
100 // write all that are left
101 if(wStr.length >0)
102 {
103 cos.writeString(wStr.join(""));
104 wStr.length = 0;
105 }
106 }
107
108 cos.close();
109 },
110
111 getString: function(key, value, filter)
112 {
113 // if the used times is smaller than filter
114 // it will be skipped to save some memory
115 if(value < filter)
116 {
117 return null;
118 }
119
120 return key +":" + value + "\n";
121 }
122
123 };
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