Finished core documentation
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Dimitry Ivanov
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# HTML Renderer
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# HTML Renderer
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Starting with <Badge text="3.0.0" /> `MarkwonHtmlRenderer` controls how HTML
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is rendered:
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```java
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Markwon.builder(context)
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.usePlugin(new AbstractMarkwonPlugin() {
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@Override
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public void configureHtmlRenderer(@NonNull MarkwonHtmlRenderer.Builder builder) {
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builder.setHandler("a", new MyTagHandler());
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}
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});
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```
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:::danger
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Customizing `MarkwonHtmlRenderer` is not enough to include HTML content in your application.
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You must explicitly include [markwon-html](/docs/v3/html/) artifact (include HtmlParser)
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to you project and register `HtmlPlugin`:
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```java
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Markwon.builder(context)
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.usePlugin(HtmlPlugin.create())
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```
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:::
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For example, to create an `<a>` HTML tag handler:
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```java
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builder.setHandler("a", new SimpleTagHandler() {
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@Override
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public Object getSpans(
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@NonNull MarkwonConfiguration configuration,
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@NonNull RenderProps renderProps,
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@NonNull HtmlTag tag) {
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return new LinkSpan(
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configuration.theme(),
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tag.attributes().get("href"),
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configuration.linkResolver());
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}
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});
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```
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`SimpleTagHandler` can be used for simple cases when a tag does not require any special
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handling (like visiting it's children)
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:::tip
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One can return `null` a single span or an array of spans from `getSpans` method
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:::
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For a more advanced usage `TagHandler` can be used directly:
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```java
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builder.setHandler("a", new TagHandler() {
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@Override
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public void handle(@NonNull MarkwonVisitor visitor, @NonNull MarkwonHtmlRenderer renderer, @NonNull HtmlTag tag) {
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// obtain default spanFactory for Link node
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final SpanFactory factory = visitor.configuration().spansFactory().get(Link.class);
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if (factory != null) {
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// set destination property
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CoreProps.LINK_DESTINATION.set(
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visitor.renderProps(),
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tag.attributes().get("href"));
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// Obtain spans from the factory
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final Object spans = factory.getSpans(
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visitor.configuration(),
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visitor.renderProps());
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// apply spans to SpannableBuilder
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SpannableBuilder.setSpans(
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visitor.builder(),
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spans,
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tag.start(),
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tag.end());
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}
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}
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});
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```
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@ -1 +1,61 @@
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# Spans Factory
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# Spans Factory
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Starting with <Badge text="3.0.0" /> `MarkwonSpansFactory` controls what spans are displayed
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for markdown nodes.
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```java
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Markwon.builder(context)
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.usePlugin(new AbstractMarkwonPlugin() {
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@Override
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public void configureSpansFactory(@NonNull MarkwonSpansFactory.Builder builder) {
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// passing null as second argument will remove previously added
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// factory for the Link node
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builder.setFactory(Link.class, null);
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}
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});
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```
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## SpanFactory
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In order to create a _generic_ interface for all possible Nodes, a `SpanFactory`
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was added:
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```java
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builder.setFactory(Link.class, new SpanFactory() {
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@Nullable
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@Override
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public Object getSpans(@NonNull MarkwonConfiguration configuration, @NonNull RenderProps props) {
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return null;
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}
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});
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```
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All possible arguments are passed via [RenderProps](/docs/v3/core/render-props.md):
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```java
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builder.setFactory(Link.class, new SpanFactory() {
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@Override
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public Object getSpans(@NonNull MarkwonConfiguration configuration, @NonNull RenderProps props) {
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final String href = CoreProps.LINK_DESTINATION.require(props);
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return new LinkSpan(configuration.theme(), href, configuration.linkResolver());
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}
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});
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```
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`SpanFactory` allows returning `null` for a certain span (no span will be applied).
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Or an array of spans:
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```java
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builder.setFactory(Link.class, new SpanFactory() {
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@Override
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public Object getSpans(@NonNull MarkwonConfiguration configuration, @NonNull RenderProps props) {
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return new Object[]{
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new LinkSpan(
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configuration.theme(),
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CoreProps.LINK_DESTINATION.require(props),
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configuration.linkResolver()),
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new ForegroundColorSpan(Color.RED)
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};
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}
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});
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```
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@ -128,12 +128,24 @@ Typeface of code content
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<ThemeProperty name="codeTypeface" type="android.graphics.Typeface" defaults="Typeface.MONOSPACE" />
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### Block code typeface <Badge text="3.0.0" />
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Typeface of block code content
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<ThemeProperty name="codeBlockTypeface" type="android.graphics.Typeface" defaults="<code>codeTypeface</code> if set or Typeface.MONOSPACE" />
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### Code text size
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Text size of code content
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<ThemeProperty name="codeTextSize" type="@Px int" defaults="(Content text size) * 0.87 if no custom <a href='#code-typeface'>Typeface</a> was set, otherwise (content text size)" />
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### Block code text size <Badge text="3.0.0" />
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Text size of block code content
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<ThemeProperty name="codeBlockTextSize" type="@Px int" defaults="<code>codeTextSize</code> if set or (content text size) * 0.87 if no custom <a href='#code-typeface'>Typeface</a> was set, otherwise (content text size)" />
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## Heading
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### Break height
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@ -32,7 +32,7 @@ public interface MarkwonSpansFactory {
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interface Builder {
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@NonNull
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<N extends Node> Builder setFactory(@NonNull Class<N> node, @NonNull SpanFactory factory);
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<N extends Node> Builder setFactory(@NonNull Class<N> node, @Nullable SpanFactory factory);
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@NonNull
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MarkwonSpansFactory build();
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@ -43,8 +43,12 @@ class MarkwonSpansFactoryImpl implements MarkwonSpansFactory {
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@NonNull
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@Override
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public <N extends Node> Builder setFactory(@NonNull Class<N> node, @NonNull SpanFactory factory) {
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factories.put(node, factory);
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public <N extends Node> Builder setFactory(@NonNull Class<N> node, @Nullable SpanFactory factory) {
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if (factory == null) {
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factories.remove(node);
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} else {
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factories.put(node, factory);
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}
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return this;
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}
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@ -42,10 +42,10 @@ public abstract class MarkwonHtmlRenderer {
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Builder allowNonClosedTags(boolean allowNonClosedTags);
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@NonNull
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Builder addHandler(@NonNull String tagName, @NonNull TagHandler tagHandler);
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Builder setHandler(@NonNull String tagName, @NonNull TagHandler tagHandler);
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@NonNull
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Builder addHandler(@NonNull Collection<String> tagNames, @NonNull TagHandler tagHandler);
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Builder setHandler(@NonNull Collection<String> tagNames, @NonNull TagHandler tagHandler);
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@NonNull
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Builder removeHandler(@NonNull String tagName);
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@ -100,14 +100,14 @@ class MarkwonHtmlRendererImpl extends MarkwonHtmlRenderer {
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@NonNull
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@Override
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public Builder addHandler(@NonNull String tagName, @NonNull TagHandler tagHandler) {
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public Builder setHandler(@NonNull String tagName, @NonNull TagHandler tagHandler) {
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tagHandlers.put(tagName, tagHandler);
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return this;
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}
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@NonNull
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@Override
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public Builder addHandler(@NonNull Collection<String> tagNames, @NonNull TagHandler tagHandler) {
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public Builder setHandler(@NonNull Collection<String> tagNames, @NonNull TagHandler tagHandler) {
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for (String tagName : tagNames) {
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if (tagName != null) {
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tagHandlers.put(tagName, tagHandler);
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@ -45,37 +45,37 @@ public class HtmlPlugin extends AbstractMarkwonPlugin {
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public void configureHtmlRenderer(@NonNull MarkwonHtmlRenderer.Builder builder) {
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builder
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.addHandler(
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.setHandler(
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"img",
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ImageHandler.create())
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.addHandler(
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.setHandler(
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"a",
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new LinkHandler())
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.addHandler(
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.setHandler(
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"blockquote",
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new BlockquoteHandler())
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.addHandler(
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.setHandler(
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"sub",
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new SubScriptHandler())
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.addHandler(
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.setHandler(
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"sup",
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new SuperScriptHandler())
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.addHandler(
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.setHandler(
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asList("b", "strong"),
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new StrongEmphasisHandler())
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.addHandler(
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.setHandler(
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asList("s", "del"),
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new StrikeHandler())
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.addHandler(
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.setHandler(
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asList("u", "ins"),
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new UnderlineHandler())
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.addHandler(
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.setHandler(
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asList("ul", "ol"),
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new ListHandler())
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.addHandler(
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.setHandler(
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asList("i", "em", "cite", "dfn"),
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new EmphasisHandler())
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.addHandler(
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.setHandler(
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asList("h1", "h2", "h3", "h4", "h5", "h6"),
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new HeadingHandler());
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}
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