Refactor vertical tabs for reusability

In practice, if you look at TabsMacro you’ll see that the width of the
tab content is wrong, and will usually overflow the container. Next
step is to fix that by using flexbox…

core/ui/PageMacros.tid

@@ -8,8 +8,9 @@ title: $:/core/ui/PageMacros
 <<colour $name$>>
 \end
 
-\define tabs(tabsList,default,state:"$:/state/tab")
+\define tabs(tabsList,default,state:"$:/state/tab",class)
-<div class="tw-tab-buttons">
+<div class="tw-tab-set $class$">
+<div class="tw-tab-buttons $class$">
 	<$list filter="$tabsList$" variable="currentTab">
 		<$button set=<<qualify "$state$">> setTo=<<currentTab>> default="$default$" selectedClass="tw-tab-selected">
 			<$transclude tiddler=<<currentTab>> field="caption">
@@ -17,15 +18,14 @@ title: $:/core/ui/PageMacros
 			</$transclude>
 		</$button>
 	</$list>
-</div>
+</div><div class="tw-tab-divider $class$"/><div class="tw-tab-content $class$">
-<div class="tw-tab-divider"/>
-<div class="tw-tab-content">
 	<$list filter="$tabsList$" variable="currentTab">
 		<$reveal type="match" state=<<qualify "$state$">> text=<<currentTab>> default="$default$">
 			<$transclude tiddler=<<currentTab>> mode="block"/>
 		</$reveal>
 	</$list>
 </div>
+</div>
 \end
 
 \define wikitext-example(src)

core/ui/SideBar/More.tid

@@ -3,5 +3,5 @@ tags: $:/tags/SideBar
 caption: {{$:/language/SideBar/More/Caption}}
 
 <div class="tw-more-sidebar">
-<<tabs "[all[shadows+tiddlers]tag[$:/tags/MoreSideBar]!has[draft.of]]" "$:/core/ui/MoreSideBar/Tags" "$:/state/tab/moresidebar">>
+<<tabs "[all[shadows+tiddlers]tag[$:/tags/MoreSideBar]!has[draft.of]]" "$:/core/ui/MoreSideBar/Tags" "$:/state/tab/moresidebar" "tw-vertical">>
 </div>

editions/tw5.com/tiddlers/macros/TabsMacro.tid

@@ -1,17 +1,20 @@
 created: 20131228162203521
-modified: 20140225223527667
+modified: 20140509223527667
 tags: macros
 title: TabsMacro
 type: text/vnd.tiddlywiki
 
 The tabs macro displays a list of tiddlers as a tab control. The user can switch between tabs by clicking on them. The tabs are labelled with the title of the corresponding tiddler, unless there is a `caption` field present in which case it is used instead.
 
+By default the tab control arranges the tabs horizontally with the content underneath. You can also choose to have the tabs arranged vertically by passing the class `tw-vertical`.
+
 ! Parameters
 
 |!Position |!Name |!Description |!Default |
 |1st |tabsList |Filter giving the tiddlers to be displayed | |
 |2nd |default |Name of the tiddler containing the default tab | |
 |3rd |state |String to distinguish multiple tabs within the same tiddler (use of the system tiddler prefix is recommended) |''$:/state/tab'' |
+|4th |class |Additional CSS classes for the three wrappers DIV of the tab | |
 
 ! Examples
 
@@ -23,5 +26,4 @@ Here is an example of the tabs macro:
 
 <<tabs "Docs WikiText Features RoadMap" "WikiText" "$:/state/tab1">>
 
-<<tabs "[tag[tips]]" "GoogleChromeTips" "$:/state/tab1">>
+<<tabs "[tag[tips]]" "GoogleChromeTips" "$:/state/tab1" "tw-vertical">>
-

themes/tiddlywiki/vanilla/base.tid

@@ -959,7 +959,8 @@ canvas.tw-edit-bitmapeditor  {
 ** Tabs
 */
 
-.tw-tab-set {
+.tw-tab-set.tw-vertical {
+	white-space: nowrap;
 }
 
 .tw-tab-buttons {
@@ -968,6 +969,15 @@ canvas.tw-edit-bitmapeditor  {
 	margin-bottom: -1px;
 }
 
+.tw-tab-buttons.tw-vertical  {
+	display: inline-block;
+	padding-top: inherit;
+	vertical-align: top;
+	text-align: right;
+	margin-bottom: inherit;
+	margin-right: -1px;
+}
+
 .tw-tab-buttons button.tw-tab-selected {
 	color: <<colour tab-foreground-selected>>;
 	background-color: <<colour tab-background-selected>>;
@@ -978,9 +988,6 @@ canvas.tw-edit-bitmapeditor  {
 
 .tw-tab-buttons button {
 	color: <<colour tab-foreground>>;
-	padding: 2px 4px 4px 4px;
-	margin-left: 2px;
-	margin-right: 2px;
 	font-weight: 300;
 	border: none;
 	background: inherit;
@@ -990,16 +997,40 @@ canvas.tw-edit-bitmapeditor  {
 	border-right: 1px solid <<colour tab-border>>;
 }
 
+.tw-tab-buttons.tw-vertical button {
+	display: block;
+	width: 100%;
+	margin-top: 3px;
+	text-align: right;
+	background-color: <<colour tab-background>>;
+	border-left: 1px solid <<colour tab-border>>;
+	border-bottom: 1px solid <<colour tab-border>>;
+	border-right: none;
+}
+
+.tw-tab-buttons.tw-vertical button.tw-tab-selected {
+	background-color: <<colour tab-background-selected>>;
+	border-right: 1px solid <<colour tab-background-selected>>;
+}
+
 .tw-tab-divider {
 	border-top: 1px solid <<colour tab-divider>>;
 }
 
+.tw-tab-divider.tw-vertical  {
+	display: none;
+}
+
 .tw-tab-content {
 	padding-top: 14px;
 }
 
-.tw-sidebar-lists .tw-tab-buttons {
+.tw-tab-content.tw-vertical  {
-	padding-top: 15px;	
+	white-space: normal;
+	display: inline-block;
+	vertical-align: top;
+	padding-left: 14px;
+	border-left: 1px solid <<colour tab-border>>;
 }
 
 .tw-sidebar-lists .tw-tab-buttons button.tw-tab-selected {
@@ -1022,47 +1053,13 @@ canvas.tw-edit-bitmapeditor  {
 	border-top: 1px solid <<colour sidebar-tab-divider>>;
 }
 
-.tw-more-sidebar {
-	white-space: nowrap;
-}
-
-@media (min-width: 770px) {
-	.tw-more-sidebar {
-		margin-left: -14px;
-	}
-}
-
-.tw-more-sidebar .tw-tab-buttons {
-	display: inline-block;
-	vertical-align: top;
-	text-align: right;
-	padding-top: 0;
-	padding-left: 0;
-}
-
-.tw-more-sidebar .tw-tab-buttons button {
-	display: block;
-	width: 100%;
-	text-align: right;
-}
-
-.tw-sidebar-lists .tw-more-sidebar .tw-tab-divider {
-	display: none;
-}
-
-.tw-more-sidebar .tw-tab-content {
-	display: inline-block;
-	vertical-align: top;
-	padding-top: 0;
-	padding-left: 14px;
-}
-
 .tw-more-sidebar .tw-tab-buttons button {
 	background-color: <<colour sidebar-tab-background>>;
 	border-top: none;
 	border-left: none;
 	border-bottom: none;
 	border-right: 1px solid #ccc;
+	margin-bottom: inherit;
 }
 
 .tw-more-sidebar .tw-tab-buttons button.tw-tab-selected {