v1.2.0

Added

• Form-state selectors follow live form state: :checked, :indeterminate, :disabled, :enabled, :read-only and :read-write (with :checked + label, :has(:checked), disabled fieldset and radio groups) restyle when the user clicks or uses the keyboard, and after SetChecked, SetIndeterminate, a selected option, a form reset or a disabled attribute edit, and equal a page parsed with that state. A host can style appearance: none checkboxes and radios with these selectors.
• InteractivePage.SetIndeterminate and IsIndeterminate.
• A text control's selection highlight takes its color and background-color from ::selection rules.
• color-scheme (light, dark, light dark, only) and the system colors under it (Canvas, CanvasText, Field, ButtonFace, GrayText, Highlight, AccentColor and the rest, with Chrome's light and dark values), light-dark() by the element's used scheme, and the dark canvas of a dark root. ColorSchemes, ComputedValues.ColorScheme and DarkScheme.
• HtmlPageOptions.PrefersDarkColorScheme, HtmlRenderOptions.PrefersDarkColorScheme and StyleTable.PrefersDarkScheme: the host's preferred scheme, used by color-scheme: light dark and prefers-color-scheme.
• Native form controls in Chrome's dark palette: fields, buttons, selects and list boxes, checkboxes and radios, range, progress and meter, disabled states, the focus ring and the select popup.
• accent-color follows Chrome's contrast rules: the check mark is white or dark by contrast, and a range or progress track turns dark under a light accent (and light under a dark accent in the dark scheme); the track border leaves a ring over the filled part.
• ::placeholder rules set the color of a text control's placeholder; the default is #757575 under both schemes.
• A forms-themed geometry set and pixel-similarity runs under a dark preferred scheme (GEOMDIFF_PREFERS_DARK).

Changed

• OneHtml and OneHtml.Accessibility 1.4.0.
• Hover, active and focus on an HTML page, and form state changes, go through OneHtml's live cascade: restyling allocates nothing once warm (a hover on the 1,000-node HUD page was about 24 KB).
• @keyframes come from OneHtml's resolved keyframes: @layer and origin precedence, var() per element, merged offsets. Animations that are already running keep the keyframes they started with.
• OneRender.Interaction.ElementStateChange now has the same name as a type OneHtml 1.4.0 added to RecursiveAI.OneHtml.Css. Code that imports both namespaces needs a using alias or a qualified name.
• Light-scheme paint, measured from Chrome again: the track border of a range and progress is drawn over the filled part, the focus ring has a 1 px white outer ring, the selected option of an unfocused list box is #cecece (was #cbcbcb), a disabled list box is white with a #e2e2e2 border, and the textarea resizer has a light second stroke.
• The range thumb is item part 6 and its ring part 8 of the control's ids (the parts of the track and the thumb are painted separately).