flexmark-java extension for defining and expanding simple macros in markdown
Macro Definitions are block elements which can contain any markdown element(s) but can be expanded in a block or inline context, allowing block elements to be used where only inline elements are permitted by the syntax.
Macro definitions start with a line of >>>macroName
where macro name consists of a-z, A-Z, 0-9, - or _ and is terminated by a line with <<<
. All text between these lines is parsed as markdown blocks. Macro definition blocks can only be defined at the document level without any indentation and are not rendered in the output.
Macro reference is an inline element of the form <<<macroName>>>
and is replaced by the macro definition rendered content, including any block elements. This implies that it is possible to include block elements where they are normally not possible using plain markdown.
When a macro definition contains a single paragraph node then it will be rendered as text contained by the paragraph without the <p></p>
wrapper to allow plain text to be rendered as an inline text.
If a macro reference contains an undefined macroName
then the node will be rendered as plain text consisting of <<<macroName>>>
Recursive macros are resolved by stopping macro expansion on the first macro reference which refers to a macro definition which is currently being expanded. The first recursive macro reference will result in no expansion.
Paragraph with a <<<simpleMacro>>>. >>>simpleMacro **bold** text <<<
Is equivalent to:
Paragraph with a **bold** text.
Paragraph with a <<<blockMacro>>> inserted. >>>blockMacro 1. item 1 1. item 2 <<<
Renders as:
<p>Paragraph with a <ol> <li>item 1</li> <li>item 2</li> </ol> inserted.</p>
To give:
Paragraph with a
inserted.
Adding complex content to tables is possible with macros.
| Complex | Data | |-------------|--------------| | <<<macro>>> | <<<macro2>>> | >>>macro 1. Item 1 2. Item 2 3. Item 3 | Column 1 | Column 2 | |----------|----------| | a | b | | c | d | > Block Quote and more <<< >>>macro2 - Item 1 - Item 2 - Item 3 <<<
Renders as:
<table> <thead> <tr><th> Complex </th><th> Data </th></tr> </thead> <tbody> <tr><td> <ol> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ol> <table> <thead> <tr><th> Column 1 </th><th> Column 2 </th></tr> </thead> <tbody> <tr><td> a </td><td> b </td></tr> <tr><td> c </td><td> d </td></tr> </tbody> </table> <blockquote> <p>Block Quote and more</p> </blockquote> </td><td> <ul> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ul> </td></tr> </tbody> </table>
To result in:
Complex DataBlock Quote and more
Use class MacrosExtension
in artifact flexmark-ext-macros
.
The following options are available:
Defined in MacrosExtension
class:
MACRO_DEFINITIONS
new repository repository for document's macro definitions MACRO_DEFINITIONS_KEEP
KeepType.FIRST
which duplicates to keep. MACRO_DEFINITIONS_PLACEMENT
ElementPlacement.AS_IS
formatting option see: Markdown Formatter MACRO_DEFINITIONS_SORT
ElementPlacementSort.AS_IS
formatting option see: Markdown Formatter SOURCE_WRAP_MACRO_REFERENCES
false
when true will wrap macro reference generated code in div
or span
with source position information
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