gitk: Add accelerators to frequently used menu commands

This commit documents keyboard accelerators used for menu
commands in the menu, as it is usually done, and adds some
more, e.g. F4 to invoke Edit View (or New View if the current
view is the un-editable "All files" view).

The changes include a workaround for handling Shift-F4 on
systems where XKB binds special XF86_Switch_VT_* symbols
to Ctrl-Alt-F* combinations.  Tk often receives these codes
when Shift-F* is pressed, so it is necessary to bind the
relevant actions to them as well.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

gitk

@@ -1801,6 +1801,11 @@ proc setoptions {} {
 # command to invoke for command, or {variable value} for radiobutton
 proc makemenu {m items} {
     menu $m
+    if {[tk windowingsystem] eq {aqua}} {
+	set Meta1 Cmd
+    } else {
+	set Meta1 Ctrl
+    }
     foreach i $items {
 	set name [mc [lindex $i 1]]
 	set type [lindex $i 2]
@@ -1826,7 +1831,9 @@ proc makemenu {m items} {
 		    -value [lindex $thing 1]
 	    }
 	}
-	eval $m add $params [lrange $i 4 end]
+	set tail [lrange $i 4 end]
+	regsub -all {\yMeta1\y} $tail $Meta1 tail
+	eval $m add $params $tail
 	if {$type eq "cascade"} {
 	    makemenu $m.$submenu $thing
 	}
@@ -1860,17 +1867,17 @@ proc makewindow {} {
     makemenu .bar {
 	{mc "File" cascade {
 	    {mc "Update" command updatecommits -accelerator F5}
-	    {mc "Reload" command reloadcommits}
+	    {mc "Reload" command reloadcommits -accelerator Meta1-F5}
 	    {mc "Reread references" command rereadrefs}
-	    {mc "List references" command showrefs}
-	    {mc "Quit" command doquit}
+	    {mc "List references" command showrefs -accelerator F2}
+	    {mc "Quit" command doquit -accelerator Meta1-Q}
 	}}
 	{mc "Edit" cascade {
 	    {mc "Preferences" command doprefs}
 	}}
 	{mc "View" cascade {
-	    {mc "New view..." command {newview 0}}
-	    {mc "Edit view..." command editview -state disabled}
+	    {mc "New view..." command {newview 0} -accelerator Shift-F4}
+	    {mc "Edit view..." command editview -state disabled -accelerator F4}
 	    {mc "Delete view" command delview -state disabled}
 	    {xx "" separator}
 	    {mc "All files" radiobutton {selectedview 0} -command {showview 0}}
@@ -2232,7 +2239,12 @@ proc makewindow {} {
     bindkey <Key-Return> {dofind 1 1}
     bindkey ? {dofind -1 1}
     bindkey f nextfile
-    bindkey <F5> updatecommits
+    bind . <F5> updatecommits
+    bind . <$M1B-F5> reloadcommits
+    bind . <F2> showrefs
+    bind . <Shift-F4> {newview 0}
+    catch { bind . <Shift-Key-XF86_Switch_VT_4> {newview 0} }
+    bind . <F4> edit_or_newview
     bind . <$M1B-q> doquit
     bind . <$M1B-f> {dofind 1 1}
     bind . <$M1B-g> {dofind 1 0}
@@ -3624,6 +3636,16 @@ proc decode_view_opts {n view_args} {
     set newviewopts($n,args) [shellarglist $oargs]
 }
 
+proc edit_or_newview {} {
+    global curview
+
+    if {$curview > 0} {
+	editview
+    } else {
+	newview 0
+    }
+}
+
 proc editview {} {
     global curview
     global viewname viewperm newviewname newviewopts