From ac738ba838f899d98ff0570e1070cdd62d6b77c5 Mon Sep 17 00:00:00 2001
From: j-p-e-g <j-p-e-g@c06c8d41-db1a-0410-9941-cceddc491573>
Date: Wed, 24 Oct 2007 14:05:13 +0000
Subject: Add a "forget level map" command, Ctrl-F, to level map. This command
 used to be for waypoints along with Ctrl-W but as that never made it into the
 level map help I don't think it matters. (FR 1745112)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2537 c06c8d41-db1a-0410-9941-cceddc491573
---
 crawl-ref/source/command.cc |  3 ++-
 crawl-ref/source/player.cc  | 19 ++++++++++++-------
 crawl-ref/source/player.h   |  2 +-
 crawl-ref/source/view.cc    |  3 +++
 4 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/crawl-ref/source/command.cc b/crawl-ref/source/command.cc
index 2075188735..039aff4b07 100644
--- a/crawl-ref/source/command.cc
+++ b/crawl-ref/source/command.cc
@@ -557,7 +557,8 @@ static const char *level_map_help =
     "<w>Ctrl-X</w> : set travel eXclusion\n"
     "<w>Ctrl-E</w> : Erase all travel exclusions\n"
     "<w>Ctrl-W</w> : set Waypoint\n"
-    "<w>Ctrl-C</w> : Clear level and main maps\n";
+    "<w>Ctrl-C</w> : Clear level and main maps\n"
+    "<w>Ctrl-F</w> : Forget level map\n";
 
 static const char *targeting_help_1 =
     "<h>Examine surroundings ('<w>x</w><h>' in main):\n"
diff --git a/crawl-ref/source/player.cc b/crawl-ref/source/player.cc
index af1a809c48..e36a13035e 100644
--- a/crawl-ref/source/player.cc
+++ b/crawl-ref/source/player.cc
@@ -2574,19 +2574,24 @@ bool you_resist_magic(int power)
    return 1; */
 }
 
-void forget_map(unsigned char chance_forgotten)
+// force is true for forget_map command on level map
+void forget_map(unsigned char chance_forgotten, bool force)
 {
-    unsigned char xcount, ycount = 0;
+    if ( force && !yesno("Really forget level map?", true, 'n') )
+         return;
 
-    for (xcount = 0; xcount < GXM; xcount++)
+    for (unsigned char xcount = 0; xcount < GXM; xcount++)
     {
-        for (ycount = 0; ycount < GYM; ycount++)
+        for (unsigned char ycount = 0; ycount < GYM; ycount++)
         {
-            if (random2(100) < chance_forgotten)
-                env.map[xcount][ycount].clear();
+             if (!see_grid(xcount, ycount) &&
+                 (force || random2(100) < chance_forgotten))
+             {
+                 env.map[xcount][ycount].clear();
+             }
         }
     }
-}                               // end forget_map()
+} // end forget_map()
 
 void gain_exp( unsigned int exp_gained, unsigned int* actual_gain,
                unsigned int* actual_avail_gain)
diff --git a/crawl-ref/source/player.h b/crawl-ref/source/player.h
index 443c6666d6..dd12489769 100644
--- a/crawl-ref/source/player.h
+++ b/crawl-ref/source/player.h
@@ -282,7 +282,7 @@ void display_char_status(void);
 /* ***********************************************************************
  * called from: item_use - items - misc - spells - spells3
  * *********************************************************************** */
-void forget_map(unsigned char chance_forgotten);
+void forget_map(unsigned char chance_forgotten = 100, bool force = false);
 
 
 // last updated 19may2000 {dlb}
diff --git a/crawl-ref/source/view.cc b/crawl-ref/source/view.cc
index cfbb4788df..ff8ad57325 100644
--- a/crawl-ref/source/view.cc
+++ b/crawl-ref/source/view.cc
@@ -2941,6 +2941,9 @@ void show_map( coord_def &spec_place, bool travel_mode )
             break;
 
         case CONTROL('F'):
+            forget_map(100, true);
+            break;
+            
         case CONTROL('W'):
             travel_cache.add_waypoint(start_x + curs_x - 1,
                                       start_y + curs_y - 1);
-- 
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