tex2lyx: support for glue lengths in InsetSpace

src/tex2lyx/TODO.txt

@@ -36,7 +36,6 @@ Format LaTeX feature                        LyX feature
 358    custom makeindex command             \index_command
 363    horizontal longtable alignment       InsetTabular
 364    branch file name suffix              \filename_suffix
-368    glue lengths                         InsetSpace
 371    automatic mhchem loading             \use_mhchem
 375    \includeonly                         \{begin,end}_includeonly
 376    update .aux of unincluded children   \maintain_unincluded_children

src/tex2lyx/test/box-color-size-space-align.lyx.lyx

@@ -1694,14 +1694,19 @@ in the middle. Lines can have a downbrace fill
 
 \end_inset
 
-in the middle. Lines can have absolute space 
+in the middle. Lines can have an absolute space 
 \begin_inset space \hspace{}
 \length 2cm
 \end_inset
 
- in the middle. Lines can have relative space 
+ in the middle. Lines can have a relative space 
 \begin_inset space \hspace{}
 \length 12text%
+\end_inset
+
+ in the middle. Lines can have a glue-length space 
+\begin_inset space \hspace{}
+\length 2cm+2mm-1mm
 \end_inset
 
  in the middle. Lines can have protected space 
@@ -2011,12 +2016,16 @@ in the middle. Lines can have a vfill
 \begin_inset VSpace vfill*
 \end_inset
 
- in the middle. Lines can have vertical absolute space 
+ in the middle. Lines can have a vertical absolute space 
 \begin_inset VSpace 2cm
 \end_inset
 
- in the middle. Lines can have vertical relative space 
+ in the middle. Lines can have a vertical relative space 
 \begin_inset VSpace 9col%
+\end_inset
+
+ in the middle. Lines can have a vertical glue-length space 
+\begin_inset VSpace 2cm-2bp+1cc
 \end_inset
 
  in the middle. Lines can have protected vertical space 

src/tex2lyx/test/box-color-size-space-align.tex

@@ -357,8 +357,9 @@ Lines can have a left arrow fill \leftarrowfill in the middle.
 Lines can have a right arrow fill \rightarrowfill in the middle.
 Lines can have a upbrace fill \upbracefill in the middle.
 Lines can have a downbrace fill \downbracefill in the middle.
-Lines can have absolute space \hspace{2cm} in the middle.
+Lines can have an absolute space \hspace{2cm} in the middle.
-Lines can have relative space \hspace{0.12\textwidth} in the middle.
+Lines can have a relative space \hspace{0.12\textwidth} in the middle.
+Lines can have a glue-length space \hspace{2cm plus 2mm minus 1mm} in the middle.
 Lines can have protected space \hspace*{2cm} in the middle.
 
 We also handle defined spaces:
@@ -422,8 +423,9 @@ interword: $a\ b$
 Lines can have a vfill \vfill in the middle.
 Lines can have a vfill \vspace{\fill} in the middle.
 Lines can have a protected vfill \vspace*{\fill} in the middle.
-Lines can have vertical absolute space \vspace{2cm} in the middle.
+Lines can have a vertical absolute space \vspace{2cm} in the middle.
-Lines can have vertical relative space \vspace{0.09\columnwidth} in the middle.
+Lines can have a vertical relative space \vspace{0.09\columnwidth} in the middle.
+Lines can have a vertical glue-length space \vspace{2cm minus 2bp plus 1cc} in the middle.
 Lines can have protected vertical space \vspace*{2cm} in the middle.
 
 We also handle skips:

src/tex2lyx/text.cpp

@@ -4408,7 +4408,27 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 				}
 			}
 
-			if (t.cs()[0] == 'h' && (known_unit || known_hspace)) {
+			// check for glue lengths
+			bool is_gluelength = false;
+			string gluelength = length;
+			string::size_type i = length.find(" minus");
+			if (i == string::npos) {
+				i = length.find(" plus");
+				if (i != string::npos)
+					is_gluelength = true;
+			} else
+				is_gluelength = true;
+			// if yes transform "9xx minus 8yy plus 7zz"
+			if (is_gluelength) {
+				i = gluelength.find(" minus");
+				if (i != string::npos)
+					gluelength.replace(i, 7, "-");
+				i = gluelength.find(" plus");
+				if (i != string::npos)
+					gluelength.replace(i, 6, "+");
+			}
+
+			if (t.cs()[0] == 'h' && (known_unit || known_hspace || is_gluelength)) {
 				// Literal horizontal length or known variable
 				context.check_layout(os);
 				begin_inset(os, "space ");
@@ -4420,10 +4440,11 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 					os << unit;
 				os << "}";
 				if (known_unit && !known_hspace)
-					os << "\n\\length "
+					os << "\n\\length " << translate_len(length);
-					   << translate_len(length);
+				if (is_gluelength)
+					os << "\n\\length " << gluelength;
 				end_inset(os);
-			} else if (known_unit || known_vspace) {
+			} else if (known_unit || known_vspace || is_gluelength) {
 				// Literal vertical length or known variable
 				context.check_layout(os);
 				begin_inset(os, "VSpace ");
@@ -4431,6 +4452,8 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 					os << unit;
 				if (known_unit && !known_vspace)
 					os << translate_len(length);
+				if (is_gluelength)
+					os << gluelength;
 				if (starred)
 					os << '*';
 				end_inset(os);