Add --contains flag to abcfield.py.

Currently we rely on any N: field with a Change: subnotice being the first
N: field. Add --contains field to abcfield.py to remove this restriction.

Also use it to extract new subfield Credit: and add that if present
to the tune information in print and on web.

Session/AllInAGardenGreen.abc

@@ -5,6 +5,7 @@ R:March
 O:England
 Z:Paul Hardy's Session Tunebook 2013 (see www.paulhardy.net). Creative Commons cc by-nc-sa licenced.
 N: Change: GatheringPeascods.abc
+N: Credit: Paul Hardy's Session Tunebook
 M:2/2
 L:1/8
 Q:1/2=90

Session/ButteredPeas.abc

@@ -3,6 +3,7 @@ T:Buttered Peas
 R:Polka
 O:England
 Z:Paul Hardy's Session Tunebook 2013 (see www.paulhardy.net). Creative Commons cc by-nc-sa licenced.
+N: Credit: Paul Hardy's Session Tunebook
 M:2/2
 L:1/8
 Q:1/4=180

Session/OrangeInBloom.abc

@@ -3,6 +3,7 @@ T:Orange in Bloom
 T:Sherborne Waltz
 R:Waltz
 O:England
+N: Credit: Paul Hardy's Session Tunebook
 Z:Paul Hardy's Session Tunebook 2013 (see www.paulhardy.net). Creative Commons cc by-nc-sa licenced.
 M:3/4
 L:1/8

abcfield.py

@@ -109,6 +109,9 @@ def process(inf, options):
     for line in inf:
         line = line.strip()
         if len(line) > 2 and line[0] == options.field and line[1] == ':':
+            if len(options.contains) > 0:
+                if line.find(options.contains) < 0:
+                    continue
             if n > 1:
                 n = n - 1
             else:
@@ -129,6 +132,10 @@ parser.add_option("-n", "--index", dest="index",
                   action="store", type="int", default=1,
                   help="report INDEXth value [default: %default]",
                   metavar="INDEX")
+parser.add_option("-c", "--contains", dest="contains",
+                  action="store", type="string", default="",
+                  help="report only if line contains CONTENT",
+                  metavar="CONTENT")
 (options, args) = parser.parse_args()
 
 if options.html and options.latex:

dottes.html.tune

@@ -34,6 +34,9 @@
           </div>
         </div>
         <img class="dottes-png" src="@TUNE@.png" alt="@TITLE@ dots">
+        <div class="dottes-credit-@CREDITVISIBILITY@">
+          From @CREDIT@.
+        </div>
         <div class="dottes-change-@CHANGEVISIBILITY@">
           Change: <a class="dottes-change-link"
                      href="@CHANGETUNE@">@CHANGETITLE@</a>

dottes.tex

@@ -47,8 +47,8 @@
 
 % Show the main tune graphic and optional change.
 % Args are tune name, tune title, tune subtitle, composer, tune graphic
-% filename, change name, change title.
-\newcommand{\showtune}[7]{%
+% filename, change name, change title, credit.
+\newcommand{\showtune}[8]{%
   \vfill
   \begin{center}
   \phantomsection
@@ -63,8 +63,11 @@
   }
   \addcontentsline{toc}{section}{#2}
   \end{center}
+  \ifemptyarg{#8}{}{%
+    From {#8}.
+  }%
   \ifemptyarg{#6}{}{%
-    Change: \hyperlink{#6}{#7}
+    Change: \hyperlink{#6}{#7}.
   }%
 }
 

makeBookeTunePages.sh

@@ -44,7 +44,7 @@ find $booke -name "*.abc" | sort |
         subtitle=`$dir/abcfield.py --index 2 --field T --latex $filename`
         composer=`$dir/abcfield.py --field C --latex $filename`
 
-        changefile=`$dir/abcfield.py --field N $filename | grep "Change:" | sed -e "s/Change: *//"`
+        changefile=`$dir/abcfield.py --field N --contains "Change:" $filename | sed -e "s/Change: *//"`
         changename=""
         changetitle=""
         if [ -n "$changefile" ]; then
@@ -53,7 +53,9 @@ find $booke -name "*.abc" | sort |
             fixtitle "$changetitle"
             changetitle=$retval
         fi
-        echo -E "\showtune{$name}{$title}{$subtitle}{$composer}{$graphicsdir/$name}{$changename}{$changetitle}" >> $tunesoutput
+
+        credit=`$dir/abcfield.py --field N --contains "Credit:" $filename | sed -e "s/Credit: *//"`
+        echo -E "\showtune{$name}{$title}{$subtitle}{$composer}{$graphicsdir/$name}{$changename}{$changetitle}{$credit}" >> $tunesoutput
 
         echo -E "\showfirstline{$name}{$title}{$graphicsdir/firstline-$name}" >> $indexoutput
     done

makeWeb.sh

@@ -67,7 +67,7 @@ find $bookedir -name "*.abc" | sort |
         title=$retval
         subtitle=`$dir/abcfield.py --index 2 --field T --latex $filename`
         composer=`$dir/abcfield.py --field C --latex $filename`
-        changefile=`$dir/abcfield.py --field N $filename | grep "Change:" | sed -e "s/Change: *//"`
+        changefile=`$dir/abcfield.py --field N --contains "Change:" $filename | sed -e "s/Change: *//"`
         changetitle=""
         changevisibility="no"
         if [ -n "$changefile" ]; then
@@ -77,6 +77,11 @@ find $bookedir -name "*.abc" | sort |
             fixtitle "$changetitle"
             changetitle=$retval
         fi
+        credit=`$dir/abcfield.py --field N --contains "Credit:" $filename | sed -e "s/Credit: *//"`
+        creditvisibility="no"
+        if [ -n "$credit" ]; then
+            creditvisibility="yes"
+        fi
 
         # Copy the ABC into the web.
         cp $filename $webdir
@@ -93,6 +98,8 @@ find $bookedir -name "*.abc" | sort |
             -e "s/@CHANGETITLE@/${changetitle//&/\&}/" \
             -e "s/@CHANGETUNE@/${changefile/.abc/.html}/" \
             -e "s/@CHANGEVISIBILITY@/${changevisibility}/" \
+            -e "s/@CREDIT@/${credit}/" \
+            -e "s/@CREDITVISIBILITY@/${creditvisibility}/" \
             -e "s/@TUNE@/${name}/" dottes.html.tune > $webdir/$tunepage
 
         sed -e "s/@TITLE@/${title//&/\&}/" \

web/css/dottes.css

@@ -244,3 +244,12 @@ div.dottes-change-yes
 div.dottes-change-link
 {
 }
+
+div.dottes-credit-no
+{
+    display: none;
+}
+
+div.dottes-credit-yes
+{
+}