Fix '.search also' with /handler config=full or existing

Make .expand* keys use relative paths if the original path was relative.

Signed-off-by: Fritz Webering <[email protected]>

doc/generic/pgf/CHANGELOG.md

@@ -28,6 +28,10 @@ lot of contributed changes. Thanks to everyone who volunteered their time!
   case the value is undefined instead of a `\relax`ed csname. It has always been
   semantically wrong to assign to the result of `\pgfkeysgetvalueof`, but now it
   will have undesired side-effects. Therefore this change is breaking.
+- If `/handler config=full or existing` is active, `/.style={...}` assignments
+  can now fail if the style is not found in any `.search also` path. Previously,
+  the style was always set in the first search path, if it was not found in the
+  currently active path.
 
 ### Added
 
@@ -74,6 +78,7 @@ lot of contributed changes. Thanks to everyone who volunteered their time!
 - Form-only patterns have no specified color #1122 
 - Make `graphdrawing` work with `name prefix` and `name suffix` options #1087
 - pgfkeys was a bit too relaxed around `\relax` #1132
+- Fix `.search also` when `/handler config=full or existing` is active #1143
 
 ### Changed
 
@@ -90,6 +95,7 @@ lot of contributed changes. Thanks to everyone who volunteered their time!
 
 - 3geek14
 - BeneIII
+- Fritz Webering
 - graue70
 - Gábor Braun
 - Joel Coffman

tex/generic/pgf/utilities/pgfkeys.code.tex

@@ -1006,7 +1006,13 @@
 \pgfkeys{/handlers/.expand twice/.code=\expandafter\expandafter\expandafter\pgfkeys@exp@call\expandafter\expandafter\expandafter{#1}}
 \pgfkeys{/handlers/.expanded/.code=\edef\pgfkeys@temp{#1}\expandafter\pgfkeys@exp@call\expandafter{\pgfkeys@temp}}
 
-\long\def\pgfkeys@exp@call#1{\pgfkeysalso{\pgfkeyscurrentpath={#1}}}
+\long\def\pgfkeys@exp@call#1{%
+  \ifpgfkeysaddeddefaultpath% If the original key was a relative path, do the expanded assignment also with a relative path
+    \pgfkeys@pathtoks{}%
+    \expandafter\pgfkeys@splitter\pgfkeyscurrentkeyRAW//% Removes the /.expand* component of the original relative key.
+  \fi
+  \pgfkeysalso{\pgfkeyscurrentpath={#1}}%
+}
 
 \def\pgfkeys@mathparse{%
   \pgfkeys@ifcsname{pgfmathparse}{%