25931: Test for prompt code reentrancy

users/13400: clarify some ksh-like editing issues

ChangeLog

@@ -1,5 +1,10 @@
 2008-10-24  Peter Stephenson  <pws@csr.com>
 
+	* users/13400: Doc/Zsh/options.yo, Etc/FAQ.yo: clarify some
+	aspects of ksh-like editing.
+
+	* 25931: Test/D01prompt.zsh: test fix in 25930.
+
 	* 25930: Src/prompt.c, Src/utils.c: dynamic directory names
 	may need recursive prompt expansion; memory leak with reverse
 	expansion of dynamic directory names.

Doc/Zsh/options.yo

@@ -1515,6 +1515,12 @@ pindex(SINGLE_LINE_ZLE)
 cindex(editor, single line mode)
 item(tt(SINGLE_LINE_ZLE) (tt(-M)) <K>)(
 Use single-line command line editing instead of multi-line.
+
+Note that although this is on by default in ksh emulation it only
+provides superficial compatibility with the ksh line editor and
+reduces the effectiveness of the zsh line editor.  As it has no
+effect on shell syntax, many users may wish to disable this option
+when using ksh emulation interactively.
 )
 pindex(VI)
 item(tt(VI))(

Etc/FAQ.yo

@@ -298,7 +298,7 @@ sect(On what machines will it run?)
 sect(What's the latest version?)
 
   Zsh 4.2.7 is the latest production version.  The latest development
-  version is 4.3.6; this contains support for multibyte character strings
+  version is 4.3.7; this contains support for multibyte character strings
   (such as UTF-8 locales).  All the main features for multibyte
   support are now in place, although there is some debugging work
   still to be done.
@@ -642,7 +642,13 @@ link(2.3)(23).
     it()  mytt(\) does not escape editing chars (use mytt(^V)).
     it()  Not all ksh bindings are set (e.g. mytt(<ESC>#); try mytt(<ESC>q)).
     it()* mytt(#) in an interactive shell is not treated as a comment by
-        default. 
+        default.
+    it()  In vi command mode the keys "k" and "j" move the cursor to the
+        end of the line.  To move the cursor to the start instead, use
+  verb(
+          bindkey -M vicmd 'k' vi-up-line-or-history
+          bindkey -M vicmd 'j' vi-down-line-or-history
+  )
   )
   it() Built-in commands:
   itemize(

Test/D01prompt.ztst

@@ -147,3 +147,57 @@
 >~[scuzzy]/rubbish
 >~mydir/foo
 ?(eval):33: no directory expansion: ~[scuzzy]
+
+  (
+  zsh_directory_name() {
+  emulate -L zsh
+  setopt extendedglob
+  local -a match mbegin mend
+  if [[ $1 = n ]]; then
+      if [[ $2 = *:l ]]; then
+	  reply=(${2%%:l}/very_long_directory_name)
+	  return 0
+      else
+	  return 1
+      fi
+  else
+      if [[ $2 = (#b)(*)/very_long_directory_name ]]; then
+	reply=(${match[1]}:l ${#2})
+	return 0
+      else
+	return 1
+      fi
+  fi
+  }
+  parent=$PWD
+  dir=$parent/very_long_directory_name
+  mkdir $dir
+  cd $dir
+  fn() {
+     PS4='+%N:%i> '
+     setopt localoptions xtrace
+     # The following is the key to the test.
+     # It invokes zsh_directory_name which does PS4 output stuff
+     # while we're doing prompt handling for the parameter
+     # substitution.  This checks recursion works OK.
+     local d=${(%):-%~}
+     print ${d//$parent/\<parent\>}
+  }
+  fn 2>stderr
+  # post process error to remove variable contents
+  while read line; do
+    # tricky: reply is set to include directory length which is variable
+    [[ $line = *reply* ]] && continue
+    print ${line//$parent/\<parent\>}
+  done <stderr >&2
+  )
+0:Recursive use of prompts
+>~[<parent>:l]
+?+zsh_directory_name:1> emulate -L zsh
+?+zsh_directory_name:2> setopt extendedglob
+?+zsh_directory_name:3> local -a match mbegin mend
+?+zsh_directory_name:4> [[ d == n ]]
+?+zsh_directory_name:12> [[ <parent>/very_long_directory_name == (#b)(*)/very_long_directory_name ]]
+?+zsh_directory_name:14> return 0
+?+fn:7> local 'd=~[<parent>:l]'
+?+fn:8> print '~[<parent>:l]'