Dante

Dante is a text parser to easily generate a Spannable from a raw input, right now it supports only HTML but the idea is to be able to support multiple input types (e.g., MarkDown).

Originally I authored Dante in Pause, the project is now dead and I decided to open source it.

This is the very first release of Dante, the api will (most likely) change for the better with successive iterations.

Installation

Simply add the following to your build.gradle:

repositories {
  jcenter()
}

dependencies {
  compile 'com.fourlastor:dante:1.0.1'
}

Usage with HTML

FlavoredHtml flavoredHtml = new FlavoredHtml.Builder(context)
  .newLine("p", "h1", "h2", "h3", "h4", "h5", "h6", "li")
  .textAppearance(R.style.headline, "h1")
  .textAppearance(R.style.title, "h2")
  .textAppearance(R.style.subhead, "h3")
  .textAppearance(R.style.body, "p", "li")
  .style(Typeface.BOLD, "b", "strong")
  .style(Typeface.ITALIC, "i", "em")
  .bullet(15, "li")
  .build();

Spanned styledHtml = flavoredHtml.parse(htmlString);

Keep in mind that this will be executed on the same thread on which flavoredHtml.parse() is executed. Since loading images might entail executing network requests, make sure you invoke flavoredHtml.parse() outside of the main thread if you are also loading images.

Loading images

You'll have to implement either ImgLoader to load images, if you need to load bitmaps (e.g., from the network) you can use ImgLoader.BitmapLoader:

FlavoredHtml flavoredHtml = new FlavoredHtml.Builder(context)
  .img(new ImgListener.BitmapImgGetter(getResources()) {
                      @Override
                      protected Bitmap getBitmap(String src) {
                          try {
                              return Picasso.with(MainActivity.this)
                                      .load(src)
                                      .get();
                          } catch (IOException e) {
                              throw new RuntimeException("Whoops!");
                          }
                      }
                  });

Keep in mind that this will be executed in the same thread in which flavoredHtml.parse() is executed, if you wish to execute network requests, do so invoking flavoredHtml.parse() outside of the main thread.

Different input types

As long as you implement Parser, it shouldn't be hard to support a different text style, see HtmlParser's implementation as a reference.