Fix #2802 (add a /closeall command, with a new plugin)

doc/source/plugins/close_all.rst

+.. _closeall-plugin:
+
+Close all
+=========
+
+.. automodule:: close_all

doc/source/plugins/index.rst

@@ -82,6 +82,11 @@ Plugin index
         Allows a message to be broadcasted on all the rooms your are in.
         Caution: do not overuse.
 
+    Close all
+        :ref:`Documentation <closeall-plugin>`
+
+        Close all tabs except MUCs and the roster.
+
     Day Change
         :ref:`Documentation <daychange-plugin>`
 
@@ -285,3 +290,4 @@ Plugin index
     irc
     change_title
     pipe_cmd
+    close_all

plugins/close_all.py

+"""
+``close_all`` plugin: close all tabs except MUCs and the roster.
+
+Commands
+--------
+
+.. glossary::
+
+    /closeall
+        **Usage:** ``/closeall``
+
+        Close all tabs except the roster and MUC tabs.
+"""
+from plugin import BasePlugin
+import tabs
+from decorators import command_args_parser
+
+
+class Plugin(BasePlugin):
+    def init(self):
+        self.api.add_command('closeall', self.command_closeall,
+                             help='Close all non-muc tabs.')
+
+    @command_args_parser.ignored
+    def command_closeall(self):
+        """
+        /closeall
+        """
+        current = self.core.current_tab()
+        if not isinstance(current, (tabs.RosterInfoTab, tabs.MucTab)):
+            self.core.go_to_roster()
+            current = self.core.current_tab()
+
+        def filter_func(x):
+            return not isinstance(x, (tabs.RosterInfoTab, tabs.MucTab))
+
+        matching_tabs = list(filter(filter_func, self.core.tabs))
+        length = len(matching_tabs)
+        for tab in matching_tabs:
+            self.core.close_tab(tab)
+        self.core.current_tab_nb = current.nb
+        self.api.information('%s tabs closed.' % length, 'Info')
+        self.core.refresh_window()
+
+

src/core/core.py

@@ -1286,6 +1286,7 @@ class Core(object):
         """
         Close the given tab. If None, close the current one
         """
+        was_current = tab is None
         tab = tab or self.current_tab()
         if isinstance(tab, tabs.RosterInfoTab):
             return              # The tab 0 should NEVER be closed
@@ -1293,9 +1294,10 @@ class Core(object):
         del tab.commands      # and make the object collectable
         tab.on_close()
         nb = tab.nb
-        if self.previous_tab_nb != nb:
-            self.current_tab_nb = self.previous_tab_nb
-            self.previous_tab_nb = 0
+        if was_current:
+            if self.previous_tab_nb != nb:
+                self.current_tab_nb = self.previous_tab_nb
+                self.previous_tab_nb = 0
         if config.get('create_gaps'):
             if nb >= len(self.tabs) - 1:
                 self.tabs.remove(tab)
@@ -1315,7 +1317,8 @@ class Core(object):
             self.current_tab_nb = len(self.tabs) - 1
         while not self.tabs[self.current_tab_nb]:
             self.current_tab_nb -= 1
-        self.current_tab().on_gain_focus()
+        if was_current:
+            self.current_tab().on_gain_focus()
         self.refresh_window()
         import gc
         gc.collect()