some more uses of Requires.

The package ifthen needs to be added to LaTeXConfig.lyx. I'll do this when that file can be opened again.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@22419 a592a061-630c-0410-9148-cb99ea01b6c8

lib/chkconfig.ltx

@@ -231,6 +231,7 @@
 \TestPackage{endnotes}
 \TestPackage{enumitem}
 \TestPackage{esint}
+\TestPackage{ifthen}
 \TestPackage{fancybox}
 \TestPackage{fancyhdr}
 \TestPackage{framed}

lib/layouts/amsart-plain.layout

@@ -17,8 +17,10 @@ Input amsart.layout
 
 # Use a simpler preamble.
 Preamble
-	\usepackage{amsmath,amsthm}
+	\usepackage{amsthm}
 	\usepackage{amsfonts}
 EndPreamble
 
+Requires	amsmath
+
 Input amsmaths-plain.inc

lib/layouts/entcs.layout

@@ -11,8 +11,10 @@ ClassOptions
 	FontSize   11
 End
 
+Requires	ifthen
+
 Preamble
-	\usepackage{entcsmacro,ifthen}
+	\usepackage{entcsmacro}
 	\newcommand{\theTitle}[1]{}
 	\newcommand{\theAuthor}[1]{}
 	\newcommand{\theAddress}[1]{}

lib/layouts/foils.layout

@@ -95,9 +95,7 @@ Style TickList
 	AlignPossible         Block, Left
 	LabelType             Static
 	LabelString           "_/"
-	Preamble
-	   \usepackage{pifont}
-	EndPreamble
+	Requires	      pifont
 End
 
 Style CrossList
@@ -116,9 +114,7 @@ Style CrossList
 	AlignPossible         Block, Left
 	LabelType             Static
 	LabelString           "><"
-	Preamble
-	  \usepackage{pifont}
-	EndPreamble
+	Requires	      pifont
 End
 
 

lib/layouts/hanging.module

@@ -15,8 +15,8 @@ Style Hanging
   Margin Static
   LeftMargin "MMMM"
   ParIndent "-MMMM"
+  Requires	ifthen
   Preamble
-    \usepackage{ifthen}
     \newlength{\lyxhang}
     \IfFileExists{hanging.sty}{
       \usepackage{hanging}

lib/layouts/stdinsets.inc

@@ -43,6 +43,8 @@
 #	FreeSpacing           Preserve multiple spaces etc.
 #	ForceLTR              Force the "latex" language, leading to Left-to-Right
 #	                     (latin) output, e.g., in ERT or URL. A kludge.
+#	Requires              Require a given (supported) feature. Multiple features must
+#			      be comma-separated.
 #End
 
 Format 6
@@ -247,9 +249,7 @@ InsetLayout URL
 	  Color               Blue
 	  Size                Small
 	EndFont
-	Preamble
-	  \usepackage{url}
-	EndPreamble
+	Requires	      url
 End
 
 InsetLayout OptArg

src/LaTeXFeatures.cpp

@@ -533,7 +533,8 @@ char const * simplefeatures[] = {
 	"covington",
 	"csquotes",
 	"enumitem",
-	"endnotes"
+	"endnotes",
+	"ifthen"
 };
 
 int const nb_simplefeatures = sizeof(simplefeatures) / sizeof(char const *);