Improve rendering of cable node

Display wire number, color and label, as needed

src/wireviz/Harness.py

@@ -213,23 +213,31 @@ def create_graph(self) -> Graph:
             wirehtml.append('<table border="0" cellspacing="0" cellborder="0">')  # conductor table
             wirehtml.append('   <tr><td>&nbsp;</td></tr>')
 
-            colspan = 4 if cable.wirelabels else 3
-
             for i, (connection_color, wirelabel) in enumerate(zip_longest(cable.colors, cable.wirelabels), 1):
                 wirehtml.append('   <tr>')
                 wirehtml.append(f'    <td><!-- {i}_in --></td>')
-                wirehtml.append(f'    <td>{wv_colors.translate_color(connection_color, self.color_mode)}</td>')
+                wirehtml.append(f'    <td>')
+
+                wireinfo = []
+                if cable.show_wirenumbers:
+                    wireinfo.append(str(i))
+                colorstr = wv_colors.translate_color(connection_color, self.color_mode)
+                if colorstr:
+                    wireinfo.append(colorstr)
                 if cable.wirelabels:
-                    wirehtml.append(f'    <td>[{wirelabel}]</td>')
+                    wireinfo.append(wirelabel if wirelabel else '')
+                wirehtml.append(f'     {":".join(wireinfo)}')
+
+                wirehtml.append(f'    </td>')
                 wirehtml.append(f'    <td><!-- {i}_out --></td>')
                 wirehtml.append('   </tr>')
 
                 bgcolors = ['#000000'] + get_color_hex(connection_color, pad=pad) + ['#000000']
                 wirehtml.append(f'   <tr>')
-                wirehtml.append(f'    <td colspan="{colspan}" border="0" cellspacing="0" cellpadding="0" port="w{i}" height="{(2 * len(bgcolors))}">')
+                wirehtml.append(f'    <td colspan="3" border="0" cellspacing="0" cellpadding="0" port="w{i}" height="{(2 * len(bgcolors))}">')
                 wirehtml.append('     <table cellspacing="0" cellborder="0" border="0">')
                 for j, bgcolor in enumerate(bgcolors[::-1]):  # Reverse to match the curved wires when more than 2 colors
-                    wirehtml.append(f'      <tr><td colspan="{colspan}" cellpadding="0" height="2" bgcolor="{bgcolor if bgcolor != "" else wv_colors.default_color}" border="0"></td></tr>')
+                    wirehtml.append(f'      <tr><td colspan="3" cellpadding="0" height="2" bgcolor="{bgcolor if bgcolor != "" else wv_colors.default_color}" border="0"></td></tr>')
                 wirehtml.append('     </table>')
                 wirehtml.append('    </td>')
                 wirehtml.append('   </tr>')
@@ -245,7 +253,7 @@ def create_graph(self) -> Graph:
                         wireidentification.append(html_line_breaks(manufacturer_info))
                     # print parameters into a table row under the wire
                     if len(wireidentification) > 0 :
-                        wirehtml.append('   <tr><td colspan="{colspan}">')
+                        wirehtml.append('   <tr><td colspan="3">')
                         wirehtml.append('    <table border="0" cellspacing="0" cellborder="0"><tr>')
                         for attrib in wireidentification:
                             wirehtml.append(f'     <td>{attrib}</td>')
@@ -266,7 +274,7 @@ def create_graph(self) -> Graph:
                 else:
                     # shield is shown as a thin black wire
                     attributes = f'height="2" bgcolor="#000000" border="0"'
-                wirehtml.append(f'   <tr><td colspan="{colspan}" cellpadding="0" {attributes} port="ws"></td></tr>')
+                wirehtml.append(f'   <tr><td colspan="3" cellpadding="0" {attributes} port="ws"></td></tr>')
 
             wirehtml.append('   <tr><td>&nbsp;</td></tr>')
             wirehtml.append('  </table>')