YuNetSurf: Version History

• Support Delphi 12 Athens Win32 and Win64.
• Addd CSS support for CSS_DISPLAY_GRID, CSS_DISPLAY_INLINE_GRID, and CSS_POSITION_STICKY.

• Support Delphi 11 Alexandria Win32 and Win64.

• Support Delphi 10.4 Sydney Win32 and Win64.

• Fix the CSS parser to cope with situations where a block ends with a selector which has no ruleset.
• Improve error checks for the CSS flex-flow, list-style, and outline property shorthands.
• Fix handling invalid types when calculating CSS border width.

Support for CSS media queries. This is an incompatibility change.

• TYuCss:
  • DefaultMedia property is a RawByteString.
  • Media is a css_media record.
  • OnImportNotification and DoImportNotification: The Media parameter is removed.
• TYuCssBaseSheet:
  • NextPendingImport: The Media parameter is removed.
• Native API:
  • css_stylesheet_next_pending_import and css_import_notification_fn: The Media parameter is removed.
  • css_select_ctx_append_sheet and css_select_ctx_insert_sheet: The Media parameter is a #0 terminated string.
  • css_select_style and css_select_font_faces: The Media parameter is css_media_ptr, a pointer to a css_media record.
  • css_rule has the following new fields. They replace the old bit fields. The respective bit field getter and setter functions are removed.
    • index
    • items
    • type_
    • ptype
  • New unit types:
    • UNIT_TURN
    • UNIT_RESOLUTION
    • UNIT_DPI
    • UNIT_DPCM
    • UNIT_DPPX

• HTML parsing: Add detection of space only separated charsets to TYuHtmlParser descendents. Declarations like <meta content=“text/html charset=utf-8”> are generated by some programs like Apple Mail and recognized by Chrome.
• TYuCss improvements:
  • Add box-sizing property support.
  • Add support for flexbox properties:
    • align-content
    • align-items
    • align-self
    • flex
    • flex-basis
    • flex-direction
    • flex-flow
    • flex-grow
    • flex-shrink
    • flex-wrap
    • justify-content
    • order
  • Add support for new length units: cap, ch, ic, rem, lh, rlh, vh, vw, vi, vb, vmin, vmax, q.
  • Computed styles can now be shared between elements, so only unique computed styles reside in memory.
  • Where possible, bypass CSS selection and simply take a reference to another element in the DOM's style, if certain that it will be the same.
  • Fix reading beyond allocated memory when removing a sheet from selection context.
• Improve performance of case insensitive string comparisons.

• Support Delphi 10.3 Rio Win32 and Win64.

• Support Delphi 10.2 Tokyo Win32 and Win64.

• Support Delphi 10.1 Berlin Win32 and Win64.

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 API.

• Support Delphi 10 Seattle Win32 and Win64.

• Minor fixes.

• Add support for Delphi XE8 Win32 and Win64.

• Enhance the TYuCss and TYuCssSheet classes:
  • @import rules can be loaded recursively via AddImport.
  • TYuCss and descendands have all events of all their Sheets. Assign once, use everywhere.
  • TYuCss has sheet propertiy defaults. Sheets are initialized with these values and can be modified: DefaultCharSet, DefaultLanguageLevel, DefaultMedia, DefaultOrigin, DefaultQuirksAllowed.
  • TYuCss owns all Sheets, including imported sheets to other sheets.
  • New TYuCss.Sheets collection to organize sheets. The old TYuCss.AppendSheet() is no longer needed and removed.
• New TYuCss.DoComputeFontSize virtual method as common CSS compute_font_size callback for all descendants. This fixes a bug where TYuCSS was not calculating the font size when composing computed styles.
• Add absolutification for column-rule-width, column-width, and column-gap.
• New named color “rebeccapurple”. https://dev.w3.org/csswg/css-color/#valdef-color-rebeccapurple
• New native API functions: css_font_face_count_srcs, css_font_face_get_font_family, css_font_face_src_get_location, css_font_face_get_src.
• Fix memory leak if DataDone / css_stylesheet_data_done is omitted.

Unfortunately, the above changes were possible only by breaking backwards compatibility. Adjustments to existing code might be necessary, hence the major version increase. The demo projects have been adjusted for reference.

• Add CSS3 column layout properties:
  • column-count
  • column-fill
  • column-gap
  • column-rule-color
  • column-rule-style
  • column-rule-width
  • column-span
  • column-width
• Minor bug fixes.

• Support Delphi XE7 Win32 and Win64.

• New demo project YuNetSurf_Extract_Content.dpr.
• New TYuSimpleTreeWalker class, with support for WhatToShow and Filter.
• TYuSimpleNodeIterator supports WhatToShow, Filter, and PreviousNode.
• New TYuSimpleNode.Contains function.
• New TYuSimpleDocument.DocumentElement property and TYuSimpleDocument.GetElementById method.
• New TYuCss.Options property:
  • coComposeStyles replaces the Compose argument of SelectStyle methods.
  • coInlineStyles controls weather to apply inline styles.
• Add and improve documentation.
• CSS parser: Fix advancing when play-during rule has !important set.
• Correct some exotic type definitions and function names.

• Initial public release.