Add support for list-template and list-empty widgets for specifying list widget templates (#7784)

Cherry picked from #7710

editions/test/tiddlers/tests/data/list-widget/WithExplicitTemplates.tid

@@ -0,0 +1,29 @@
+title: ListWidget/WithExplicitTemplates
+description: List widget with explicit templates
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
++
+title: Output
+
+\whitespace trim
+
+\procedure test(filter)
+<$list filter=<<filter>>>
+	<$list-template>
+		<$text text=<<currentTiddler>>/>
+	</$list-template>
+	<$list-empty>
+		None!
+	</$list-empty>
+</$list>
+\end
+
+<<test "1 2 3">>
+
+<<test "">>
+
++
+title: ExpectedResult
+
+<p>123</p><p>None!</p>

editions/test/tiddlers/tests/data/list-widget/WithExplicitTemplatesInBlockMode.tid

@@ -0,0 +1,32 @@
+title: ListWidget/WithExplicitTemplatesInBlockMode
+description: List widget with explicit templates in block mode
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
++
+title: Output
+
+\whitespace trim
+
+\procedure test(filter)
+<$list filter=<<filter>>>
+
+	<$list-template>
+		<$text text=<<currentTiddler>>/>
+	</$list-template>
+
+	<$list-empty>
+		None!
+	</$list-empty>
+
+</$list>
+\end
+
+<<test "1 2 3">>
+
+<<test "">>
+
++
+title: ExpectedResult
+
+123None!

editions/test/tiddlers/tests/data/list-widget/WithExplicitTemplatesOverriddenByAttributes.tid

@@ -0,0 +1,33 @@
+title: ListWidget/WithExplicitTemplatesOverriddenByAttributes
+description: List widget with explicit templates
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
++
+title: Output
+
+\whitespace trim
+
+\procedure test(filter)
+<$list filter=<<filter>> emptyMessage="Zero" template="Template">
+	<$list-template>
+		<$text text=<<currentTiddler>>/>
+	</$list-template>
+	<$list-empty>
+		None!
+	</$list-empty>
+</$list>
+\end
+
+<<test "1 2 3">>
+
+<<test "">>
+
++
+title: Template
+
+<$text text=<<currentTiddler>>/><$text text=<<currentTiddler>>/>
++
+title: ExpectedResult
+
+<p>112233</p><p>Zero</p>

editions/test/tiddlers/tests/data/list-widget/WithLimit.tid

@@ -0,0 +1,25 @@
+title: ListWidget/WithLimit
+description: List widget with limit
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
++
+title: Output
+
+Zero: <$list filter="1 2 3 4" limit="0" template="Template"/>
+
+One: <$list filter="1 2 3 4" limit="1" template="Template"/>
+
+Two: <$list filter="1 2 3 4" limit="2" template="Template"/>
+
+Minus Two: <$list filter="1 2 3 4" limit="-2" template="Template"/>
+
++
+title: Template
+
+<$text text=<<currentTiddler>>/>
++
+title: ExpectedResult
+
+<p>Zero: </p><p>One: 1</p><p>Two: 12</p><p>Minus Two: 34
+</p>

editions/test/tiddlers/tests/data/list-widget/WithMissingTemplate.tid

@@ -0,0 +1,26 @@
+title: ListWidget/WithMissingTemplate
+description: List widget with explicit templates
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
++
+title: Output
+
+\whitespace trim
+
+\procedure test(filter)
+<$list filter=<<filter>>>
+	<$list-empty>
+		None!
+	</$list-empty>
+</$list>
+\end
+
+<<test "1 2 3">>
+
+<<test "">>
+
++
+title: ExpectedResult
+
+<p><span><a class="tc-tiddlylink tc-tiddlylink-missing" href="#1">1</a></span><span><a class="tc-tiddlylink tc-tiddlylink-missing" href="#2">2</a></span><span><a class="tc-tiddlylink tc-tiddlylink-missing" href="#3">3</a></span></p><p>None!</p>