YuNetsurf v3.0.0 for D6-XE10

YuNetSurf is a HTML5 parser and tree builder with CSS3 tokeniser, parser, and selection engine for Delphi (Embarcadero / CodeGear / Borland).

HTML Parser and Tree Builder

• Parse HTML, good and bad.

• HTML5 tokeniser with SAX-style events.

• Flexible tree builder API for custom DOM implementations.

• Readily provided HTML5 parser classes convert HTML documents into DOM trees:

  • Simple DOM tree: Fast and efficient.
  • LibXml2 tree: Fully compatible with LibXml2 functions, including XPATH and LibXslt transformation.
  • XDOM tree: Feasability study limited by XDOM restrictions.

• Fast, efficient, and low memory usage.

CSS Parser and Selection Engine

• Parse CSS, good and bad.

• Apply CSS rules to DOM nodes:

  • CSS2 and CSS3 selectors.
  • Handle most CSS2 as well as some CSS3 properties.

• Selector engines readily provided for

  • Simple DOM tree.
  • LibXml2 tree.

• Flexible selection API to apply CSS to custom DOM implementations.

• Fast, efficient, and low memory usage.

Usage Scenarios

• Extract information from HTML documents:

  • Locate HTML elements based on their tag names, attribute names or CSS properties.
  • Extract values of attributes from elements.
  • Find the n-th sibling or child element parsed data.

• Cleanup, change, or extend HTML documents:

  • Add, change, or remove attributes of elements.
  • Manipulate the inner content of elements.
  • Wrap element content inside new elements.

• Use CSS to detect hidden, highlighted, or invisible HTML fragments.

• Apply custom CSS as HTML element filter or locator.

• Download HTML documents with linked CSS URL resources.

YuNetsurf 3.0.0 – 25 Mar 2016

Incompatibility Change:

Optimize the way to handle CSS presentational hints: Previously, the CSS selection engine iterated over all properties not either in a UA stylesheet or a user stylesheet with !important set. It asked the client if there were any presentational hints for that node, once for each property. This triggered up to N_PROPERTIES * N_NODES calls to the client.

The new API asks the client to supply a list of all the presentational hints that apply to node, which is 0 for most nodes. This triggers at most N_NODES calls to the client. css_hint has been changed to include the property which the hint applies to.

Wrapper classes have been adjusted as well:

*   TYuSimpleCss.OnNodePresentationalHint
*   TYuLibXml2Css.OnNodePresentationalHint

Because of this incompatible API change, the YuNetSurf major version incremented to 3.

New Functions:

*   Add lwc_string_tolower <abbr title="Application Programming Interface">API</abbr>.</article>