Added epsilon-rules concerning the left drop.

diff --git a/helm/DEVEL/mathml_editor/doc/spec.tex b/helm/DEVEL/mathml_editor/doc/spec.tex
index 55e17218a5ac2b11195f426def7c3c55852b1796..ed95dcf14c7647c905b1b06dbfa27af06bf8d59d 100644 (file)
--- a/helm/DEVEL/mathml_editor/doc/spec.tex
+++ b/helm/DEVEL/mathml_editor/doc/spec.tex
@@ -523,32 +523,8 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
 
 \begin{description}
 
-  %*******************************************************************************************************
-  %************** rules handling the case in which the cursor has a preceding node ***********************
-  %*******************************************************************************************************
-
-  %************** cursor's parent is a group or a parameter (a p node)
-
-  \item{\verb+<g|p>[(i|n|o|s|c[!*])#]/cursor+}\\
-  remove the token.
-
-  \item{\verb+<g|p>[g#]/cursor+}\\
-  remove the cursor and append it to the \G{} node.
-
-  \item{\verb+<g|p>[<sp|sb>#]cursor+}\\
-  remove the cursor and append the $\SLDSCRIPT$
-
-  \item{\verb+<g|p>[c[p[@right-open="1"]$]#]/cursor+}\\
-  remove the cursor and append the it to the \PNODE{} node.
-
-  % remember to add the rules handling the primes
-
-  %*************************************************************************************************
-  %*********** rules handling the case in which the cursor has no preceding nodes ******************
-  %*************************************************************************************************
-
-  \item{\verb+g[@id][^#$]/cursor+}\\
-  replace the \G{} node with the cursor.
+  \item{\verb+cursor+}\\
+  replace the cursor with the $\SLDROP$.
 
 \end{description}
 
@@ -564,7 +540,7 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
   %****************************** epsilon-rules with \NLDROP ****************************
   %**************************************************************************************
 
-  %***************************** \NLDROP has no preceding nodes *************************
+  %**************  \NLDROP has neither preceding nor following nodes ********************
 
   \item{\verb+math[^#$]/+$\NLDROP$}\\
   replace the $\NLDROP$ with the cursor.
@@ -572,19 +548,14 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
   \item{\verb+g[^#$]/+$\NLDROP$}\\
   replace the \G{} node with the $\NLDROP$.
 
-  % this rule overrides the rule above
+  % this rule overrides the one above
   \item{\verb+math/g[^#$]/+$\NLDROP$}\\
   replace the $\NLDROP$ with the cursor.
 
+  % this rule is overridden by the two ones below
   \item{\verb+c/p[^#$]/+$\NLDROP$}\\
   remove the $\NLDROP$ and insert it before the \PNODE{} node.
 
-  \item{\verb+cell[^#$]/+$\NLDROP$}\\
-  replace the cell with the $\NLDROP_n$.
-
-  \item{\verb+table[^#$]/+$\NLDROP$}\\
-  replace the \TABLE{} node with the $\NLDROP$.
-
   \item{\verb+c[p[@left-open='1'][*]#$]/p[@right-open='1'][^#$]/+$\NLDROP$}\\
   replace the \CNODE{} node with the content of the first \PNODE{} node and insert the $\NLDROP$ after this content
 
@@ -594,6 +565,12 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
   \item{\verb+c[^#][!p(*)]/+$\NLDROP$}\\
   replace the \CNODE{} node with the $\NLDROP$.
 
+  \item{\verb+cell[^#$]/+$\NLDROP$}\\
+  replace the cell with the $\NLDROP_n$.
+
+  \item{\verb+table[^#$]/+$\NLDROP$}\\
+  replace the \TABLE{} node with the $\NLDROP$.
+
   %************************* \NLDROP has at least one preceding node *********************
 
   % general rules
@@ -603,7 +580,7 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
   remove the $\NLDROP$ and append it as the last child of its ex preceding brother.
 
   % this rule overrides the one above
-  \item{\verb+*[<i|n|o|s>#]/+$\NLDROP$}\\
+  \item{\verb+*[(i|n|o|s|c[!*])#]/+$\NLDROP$}\\
   remove the $\NLDROP$ and replace the token with the $\NLDROP_n$.
 
   % special rules
@@ -644,6 +621,104 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
   \item{\verb+c[^#][p[*]]/+$\NLDROP$}\\
   remove the $\NLDROP$ and insert it before the \CNODE{} node.
 
+\end{description}
+
+\paragraph{Special Left Drop}
+
+\begin{description}
+
+  %********************************************************************************************************
+  %************************************ epsilon-rules with \SLDROP ****************************************
+  %********************************************************************************************************
+
+  \item{\verb+math/+$\SLDROP$}\\
+  replace the $\SLDROP$ with the cursor.
+
+  %************************ \SLDROP has neither preceding nor following nodes *****************************
+
+  % this rule overrides the one below
+  \item{\verb+math/g[^#$]/+$\SLDROP$}\\
+  replace the $\SLDROP$ with the cursor.
+
+  \item{\verb+g[^#$]/+$\SLDROP$}\\
+  replace the \G{} node with the cursor.
+
+  \item{\verb+c[p[@left-open='1'][*]#$]/p[@right-open='1'][^#$]/+$\SLDROP$}\\
+  replace the \CNODE{} node with the content of the first \PNODE{} node and insert the cursor after this content
+
+  \item{\verb+c[p[@left-open='1'][!*]#$]/p[@right-open='1'][^#$]/+$\SLDROP$}\\
+  replace the \CNODE{} node with the cursor.
+
+  \item{\verb+c/p[^#$]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and insert it before the \PNODE{} node.
+
+  \item{\verb+c[^#][!p(*)]/+$\SLDROP$}\\
+  replace the \CNODE{} node with the cursor.
+
+  \item{\verb+cell[^#$]/+$\SLDROP$}\\
+  replace the cell with the $\NLDROP_n$.
+
+  \item{\verb+table[^#$]/+$\SLDROP$}\\
+  replace the \TABLE{} node with the cursor.
+
+  %*********************** \SLDROP has at least one preceding node ***********************************
+
+  \item{\verb+*[sp[!@id][^*g[!@id][^o[@name='prime']++\verb+o[@name='prime']$]]#]/+$\SLDROP$}\\
+  remove the last \ONODE{} node and replace the $\SLDROP$ with the cursor.
+
+  \item{\verb+*[sp[!@id][^*g[!@id][^o[@name='prime']$]]#]/+$\SLDROP$}\\
+  replace the script with its first child and replace the $\SLDROP$ with the cursor.%$\NLDROP_n$.
+
+  \item{\verb+<sp|sb>[^g[!@id][!*]#$]/+$\SLDROP$}\\
+  replace the script with the cursor.
+
+  % this rule is overridden by the three rules above.
+  \item{\verb+<sp|sb>[^*#$]+/$\SLDROP$}\\
+  replace the script node with its first child and insert the cursor after it.
+
+  \item{\verb+c[(i|n|o|s|c[!*])#]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and insert the cursor before the delimiter.
+
+  \item{\verb+c[p#(i|n|o|s|c[!*])]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and insert the cursor into the \PNODE{} node.
+
+  \item{\verb+c[p[@right-open='1']#]+}\\
+  remove the $\SLDROP$ and append the curor as last child of the \PNODE{} node.
+
+  % this rule is overridden by the two ones above.
+  \item{\verb+c[p#]/+$\SLDROP$}\\
+  move the $\SLDROP$ into the \PNODE{} node.
+
+  \item{\verb+*[(i|n|o|s|c[!*])#]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and replace the token with the cursor.
+
+  \item{\verb+*[table#]/$\SLDROP$+}\\
+  remove the $\SLDROP$ and append the $\NLDROP_n$ as the last child of the \TABLE{} node.
+
+  \item{\verb+*[c#]/+$\SLDROP$}\\
+  move the $\SLDROP$ into the \CNODE{} node.
+
+  \item{\verb+*[g#]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and append the cursor as the last child of the \G{} node.
+
+  %********** \SLDROP has no preceding node, but has following ones **************
+
+  \item{\verb+math/g[^#*]/+$\SLDROP$}\\
+  replace the $\SLDROP$ with the cursor.
+
+  \item{\verb+c[^#p][p(*)]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and insert the cursor before the \CNODE{} node.
+
+  % general rule
+  \item{\verb+*[^#*]/+$\SLDROP$}\\
+  remove the $\SLDROP$ and insert the cursor before its parent.
+
+\end{description}
+
+\paragraph{Normalize Left Drop}
+
+\begin{description}
+
   %****************************************************************************************
   %***************************** epsilon-rules with \NLDROP_n *****************************
   %****************************************************************************************
@@ -661,19 +736,13 @@ cursor with \ONODE{}, append $\tadvance$ after the \ONODE{} node
   remove the $\NLDROP_n$ and append it as last child of the \ROW{} node.
 
   \item{\verb+table[^#$]/+$\NLDROP_n$}\\
-  replace the \texttt{table} with the cursor.%$\NLDROP_n$.
+  replace the \TABLE{} with the cursor.%$\NLDROP_n$.
 
   \item{\verb+g[@id][^#$]/+$\NLDROP_n$}\\
   replace the \G{} node with the $\NLDROP_n$.
 
 \end{description}
 
-\paragraph{Special Left Drop}
-
-%\begin{description}
-
-%\end{description}
-
 \paragraph{Advance}
 
 \begin{description}