Fix and document AutoOpen

* Fix #5017 - ifDevice -> IfDevice and correct behavior of negated hostnames

docs/topics/DatabaseOperations.adoc

@@ -235,6 +235,31 @@ image::edit_entry_history.png[]
 
 NOTE: Restoring an old history item will store the current entry settings as a new history item.
 
+== Automatic Database Opening
+You can setup one or more databases to open automatically when you unlock a single database. This is done by *(1)* defining a special group named `AutoOpen` with *(2)* entries that contain the file path and credentials for each database that should be opened. There is no limit to the number of databases that can be opened.
+
+TIP: Case matters with auto open, the group name must be exactly `AutoOpen`.
+
+.AutoOpen Group and Entries
+image::autoopen.png[]
+
+To setup an entry for auto open perform the following steps:
+
+1. Create a new entry and give it any title you wish.
+2. If your database has a key file, enter its absolute or relative path in the `username` field.
+3. If your database has a password, enter it in the `password` field
+4. Enter the absolute or relative path to the database file in the `url` field. You can also use the `{DB_DIR}` placeholder to reference the absolute path of the current database file.
+5. To restrict auto open to particular devices, go to the advanced category and enter the following:
+  a. Create a new attribute named `IfDevice`.
+  b. Enter hostnames in a comma separated list to define computers that will open this database.
+  c. Prepend an exclamation mark (`!`) to explicitly exclude a device.
+  d. Examples: `LAPTOP, DESKTOP` will auto open on a computer named LAPTOP or DESKTOP. `!LAPTOP` will auto open on all devices *not* named LAPTOP.
+
+.Auto open IfDevice example
+image::autoopen_ifdevice.png[]
+
+NOTE: You can setup an entry to open on double click of the URL field by prepending `kdbx://` to the relative or absolute path to the database file. You may also have to add `file://` to access network shares (e.g., `kdbx://file://share/database.kdbx`).
+
 == Database Settings
 At any point of time, you can change the settings for your database. To make changes to the general settings, perform the following steps:
 

src/gui/DatabaseWidget.cpp

@@ -2060,18 +2060,23 @@ void DatabaseWidget::processAutoOpen()
         // Support ifDevice advanced entry, a comma separated list of computer names
         // that control whether to perform AutoOpen on this entry or not. Can be
         // negated using '!'
-        auto ifDevice = entry->attribute("ifDevice");
+        auto ifDevice = entry->attribute("IfDevice");
         if (!ifDevice.isEmpty()) {
-            bool loadDb = false;
+            bool loadDb = true;
             auto hostName = QHostInfo::localHostName();
-            for (auto& dev : ifDevice.split(",")) {
-                dev = dev.trimmed();
-                if (dev.startsWith("!") && dev.mid(1).compare(hostName, Qt::CaseInsensitive) == 0) {
-                    // Machine name matched an exclusion, don't load this database
-                    loadDb = false;
-                    break;
-                } else if (dev.compare(hostName, Qt::CaseInsensitive) == 0) {
+            for (auto& device : ifDevice.split(",")) {
+                device = device.trimmed();
+                if (device.startsWith("!")) {
+                    if (device.mid(1).compare(hostName, Qt::CaseInsensitive) == 0) {
+                        // Machine name matched an exclusion, don't load this database
+                        loadDb = false;
+                        break;
+                    }
+                } else if (device.compare(hostName, Qt::CaseInsensitive) == 0) {
                     loadDb = true;
+                } else {
+                    // Don't load the database if there are devices not starting with '!'
+                    loadDb = false;
                 }
             }
             if (!loadDb) {