Add ldoc tags for inherited members.

* Add `@inheritedproperty`, `@inheritedmethod` and `@inheritedsignal` ldoc tags to specify inherited members in the documentation,
* These new tags create their own section in the rendered documentation,
* Implemente these tags for `docs/common/object.ldoc` and `docs/common/widget.ldoc`.

docs/common/widget.ldoc

@@ -59,7 +59,7 @@
 
 --- Add a new `awful.button` to this widget.
 -- @tparam awful.button button The button to add.
--- @function add_button
+-- @method add_button
 -- @baseclass wibox.widget
 
 --- Emit a signal and ensure all parent widgets in the hierarchies also
@@ -67,8 +67,8 @@
 -- set of containers and layouts wrapping the widget.
 -- @tparam string signal_name
 -- @param ... Other arguments
--- @method emit_signal_recursive
 -- @baseclass wibox.widget
+-- @method emit_signal_recursive
 
 --- When the layout (size) change.
 -- This signal is emitted when the previous results of `:layout()` and `:fit()`

docs/config.ld

@@ -591,7 +591,6 @@ local function wrap_args(item)
     return "<span class='function_args'> <b>(</b>"..new_args.."<b>)</b></span>"
 end
 
-
 -- Mimics the ldoc built-in method style, but better.
 --
 -- This custom renderer exists because using ldoc built-in method detection
@@ -638,7 +637,9 @@ local function sanitize_type(item, ldoc)
     item.display_type = "<span class='summary_type'>N/A</span>"
 end
 local no_prefix = {
-    property = true, signal = true, clientruleproperty = true,
+    property           = true,
+    signal             = true,
+    clientruleproperty = true,
     deprecatedproperty = true,
 }
 
@@ -733,7 +734,6 @@ custom_display_name_handler = function(item, default_handler)
         ret = render_methods(item)
     end
 
-
     -- Get rid of the "module:" in front of method names. It is either wrong or
     -- just redundant.
     ret = ret:gsub("([^:]*)(:[^:])","%2")

docs/ldoc.css

@@ -282,6 +282,7 @@ table.module_list td, table.function_list td {
 table.module_list td.name, table.function_list td.name {
     background-color: white;
     min-width: 200px;
+    border-left-width: 0px;
     border-right-width: 0px;
 }
 table.module_list td.summary, table.function_list td.summary {
@@ -293,14 +294,28 @@ table.module_list td.summary, table.function_list td.summary {
 
 table.function_list td.shortname {
     background-color: white;
+    border-left-width: 0px;
     border-right-width: 0px;
 }
 
+table.function_list td.inheritance {
+    background-color: white;
+    border-right-width: 0px;
+    border-left-width: 0px;
+    color: #a4c7ff;
+    min-width: 200px;
+}
+
 .proptype {
     padding-right: 20px;
     float: right;
 }
 
+span.inheritance {
+    color: #9db9f3;
+    font-weight: normal;
+}
+
 td.summarytype {
     background-color: white;
     color: #a4c7ff;
@@ -402,6 +417,11 @@ ul.nowrap {
     font-weight: normal;
 }
 
+/*.inheritedmethodparent {
+    color: #9db9f3;
+    font-weight: normal;
+}*/
+
 /* stop sublists from having initial vertical space */
 ul ul { margin-top: 0px; }
 ol ul { margin-top: 0px; }

docs/ldoc.ltp

@@ -161,12 +161,12 @@
 #   else
       <td class="name" $(nowrap)><a href="#$(item.name)">$(dn)</a></td>
 #   end
-      <td class="summary">$(M(item.summary,item))</td>
-      <td class="baseclass" $(nowrap)>
+      <td colspan="$(item.inherited and 1 or 2)" class="summary">$(M(item.summary,item))</td>
 #   if item.inherited then
+      <td class="baseclass" $(nowrap)>
         Inherited from $(item.baseclass)
-#   end
       </td>
+#   end
     </tr>
 #  end -- for items
 # last_kind = kind
@@ -210,6 +210,11 @@
     <dt>
     <a name = "$(item.name)"></a>
     <strong>$(display_name(item))</strong>
+#   if item.display_inheritance then
+    <span class="inheritance">
+      &middot Inherited from
+      <a href="$(item.display_inheritance)">$(item.display_inheritance)</a>
+#   end
 #   if item.display_type then
     <span class="proptype">($(item.display_type))</span>
 #   end