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Add some comments for bug 528416

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This commit is contained in:
Ehsan Akhgari 2009-11-23 19:24:13 -05:00
parent 9f62654fa8
commit 6c703b7823
1 changed files with 17 additions and 0 deletions
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17
toolkit/mozapps/downloads/src/DownloadLastDir.jsm
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@ -34,6 +34,23 @@
*
* ***** END LICENSE BLOCK ***** */
/*
* The behavior implemented by gDownloadLastDir is documented here.
*
* In normal browsing sessions, gDownloadLastDir uses the browser.download.lastDir
* preference to store the last used download directory. The first time the user
* switches into the private browsing mode, the last download directory is
* preserved to the pref value, but if the user switches to another directory
* during the private browsing mode, that directory is not stored in the pref,
* and will be merely kept in memory. When leaving the private browsing mode,
* this in-memory value will be discarded, and the last download directory
* will be reverted to the pref value.
*
* Both the pref and the in-memory value will be cleared when clearing the
* browsing history. This effectively changes the last download directory
* to the default download directory on each platform.
*/
const LAST_DIR_PREF = "browser.download.lastDir";
const PBSVC_CID = "@mozilla.org/privatebrowsing;1";
const nsILocalFile = Components.interfaces.nsILocalFile;