exportlegends can do site maps, IDd field

Expanded exportlegends.lua to handle site maps as well, and improved
precision of args.  Identified `vs.anon_21`; I'm not sure what the
process is so I've used it here and noted it's discovery.

NEWS

@@ -1,5 +1,8 @@
 DFHack future
 
+    Misc Improvements:
+        - exportlegends.lua can now handle site maps
+
 DFHack 0.40.13-r1
     Internals:
         - unified spatter structs

Readme.rst

@@ -1420,12 +1420,15 @@ Export dwarves to RuneSmith-compatible XML.
 
 exportlegends
 -------------
-Exports data from legends mode; allowing a set-and-forget export of large worlds.  
+Controls legends mode to export data - especially useful to set-and-forget large 
+worlds, or when you want a map of every site when there are several hundred.
 
 Options:
 
+:info: Exports the world/gen info and the legends XML
+:sites: Exports all available site maps
 :maps: Exports all seventeen detailed maps
-:all: first exports the world/gen info, then the XML, then all detailed maps
+:all: Equivalent to calling all of the above, in that order
 
 
 Job management

dfhack.init-example

@@ -60,7 +60,6 @@ keybinding add Ctrl-Shift-B "adv-bodyswap force"
 
 # export all information, or just the detailed maps (doesn't handle site maps)
 keybinding add Ctrl-A@legends "exportlegends all"
-keybinding add Ctrl-D@legends "exportlegends maps"
 
 #############################
 # Context-specific bindings #

scripts/exportlegends.lua

@@ -1,8 +1,7 @@
 -- Export everything from legends mode
--- use "exportlegends maps" for detailed maps, or "exportlegends all" to also export legends
+-- Valid args:  "all", "info", "maps", "sites"
 
 gui = require 'gui'
-
 local args = {...}
 local vs = dfhack.gui.getCurViewscreen()
 local i = 1
@@ -26,8 +25,18 @@ local MAPS = {
     "Nobility and Holdings",
     "Diplomacy",
 }
+
+-- export information and XML ('p, x')
+function export_legends_info()
+    print('    Exporting:  World map/gen info')
+    gui.simulateInput(vs, 'LEGENDS_EXPORT_MAP')
+    print('    Exporting:  Legends xml')
+    gui.simulateInput(vs, 'LEGENDS_EXPORT_XML')
+end
+
+-- presses 'd' for detailed maps
 function wait_for_legends_vs()
-    vs = dfhack.gui.getCurViewscreen()
+    local vs = dfhack.gui.getCurViewscreen()
     if i <= #MAPS then
         if df.viewscreen_legendsst:is_instance(vs) then
             gui.simulateInput(vs, 'LEGENDS_EXPORT_DETAILED_MAP')
@@ -37,30 +46,48 @@ function wait_for_legends_vs()
         end
     end
 end
+
+-- selects detailed map and export it
 function wait_for_export_maps_vs()
-    vs = dfhack.gui.getCurViewscreen()
-    if df.viewscreen_export_graphical_mapst:is_instance(vs) then
+    local vs = dfhack.gui.getCurViewscreen()
+    if dfhack.gui.getCurFocus() == "export_graphical_map" then
         vs.sel_idx = i
         print('    Exporting:  '..MAPS[i]..' map')
-        i = i + 1
         gui.simulateInput(vs, 'SELECT')
+        i = i + 1
         dfhack.timeout(10,'frames',wait_for_legends_vs)
     else
         dfhack.timeout(10,'frames',wait_for_export_maps_vs)
     end
 end
 
-if df.viewscreen_legendsst:is_instance( vs ) then -- dfhack.gui.getCurFocus() == "legends" 
-    if args[1] == "all" then 
-        gui.simulateInput(vs, df.interface_key.LEGENDS_EXPORT_MAP)
-        print('    Exporting:  world map/gen info')
-        gui.simulateInput(vs, df.interface_key.LEGENDS_EXPORT_XML)
-        print('    Exporting:  legends xml')
+-- export site maps
+function export_site_maps()
+    local vs = dfhack.gui.getCurViewscreen()
+    print('    Exporting:  All possible site maps')
+    vs.anon_21 = 1 -- get to sites screen before the next bit
+    gui.simulateInput(vs, 'SELECT')
+    for i=1, #vs.sites do
+        gui.simulateInput(vs, 'LEGENDS_EXPORT_MAP')
+        gui.simulateInput(vs, 'STANDARDSCROLL_DOWN')
+    end
+    gui.simulateInput(vs, 'LEAVESCREEN')
+end
+
+-- main()
+if dfhack.gui.getCurFocus() == "legends" then
+    if args[1] == "all" then
+        export_legends_info()
+        export_site_maps()
         wait_for_legends_vs()
-    elseif args[1] == "maps" then wait_for_legends_vs()
+    elseif args[1] == "info" then 
+        wait_for_legends_vs()
+    elseif args[1] == "maps" then 
+        wait_for_legends_vs()
+    elseif args[1] == "sites" then 
+        export_site_maps()
+    else dfhack.printerr('Valid arguments are "all", "info", "maps" or "sites"')
     end
-elseif df.viewscreen_export_graphical_mapst:is_instance(vs) then
-    if args[1] == "maps" or args[1] == "all" then wait_for_export_maps_vs() end
 else
-    dfhack.printerr('Not in legends view')
-end
+    dfhack.printerr('Not in main legends view')
+end