hyper_render_core 1.3.3

Core engine for HyperRender. Universal Document Tree, single-RenderObject layout with CSS float, Flexbox, Grid, CJK typography, and crash-free text selection.

Changelog — hyper_render_core

1.3.3 - 2026-06-04

✨ New CSS & Layout

• object-fit support: Added object-fit property parsing (cover, contain, fill, none, scale-down) to control image resizing within its block container.
• Float carryover imagePixelOffset: Enhanced FloatCarryover to carry imagePixelOffset across sections to allow precise partial painting of tall floated images.

✨ New APIs & Configs

• onMemoryPressure callback: Added onMemoryPressure parameter to widgets to allow host applications to coordinate resource disposal with HyperRender's cache invalidation.
• imageConcurrency: Configured imageConcurrency setting in HyperRenderConfig and wired it into LazyImageQueue.

🐛 Bug Fixes & Refinement

• TextPainter Cache: Replaced the global TextPainter cache with a reference-counted multi-viewer safe cache.
• Color Parsing: Fixed rgb/rgba parsing bugs by properly mapping csslib function parameters.

1.3.2 - 2026-05-19

🔒 Security

• UrlSafety.isSafe added (lib/src/util/url_safety.dart) — canonical scheme blocklist (javascript:, vbscript:, data:image/svg, non-image data:, file:, mhtml:, about:) with control-character smuggling defence. The root HtmlSanitizer.isSafeUrl and the markdown sub-package's URL gate now both delegate here so no scheme can drift between adapters.
• HyperViewer.markdown(sanitize:true) pre-sanitises markdown content via HtmlSanitizer so raw <script>/<style>/<iframe> blocks can no longer survive enableInlineHtml.

🐛 Critical Layout Fix

• Unbounded-width crash eliminated — RenderHyperBox.performLayout and _computeHeightForWidth now clamp _maxWidth to _kUnboundedWidthFallback = 800.0 when constraints are double.infinity (Row without Expanded, horizontal SingleChildScrollView, intrinsic queries from unbounded parents). Previously _FlexFragment.layout propagated infinity into BoxConstraints(minWidth: ∞) and tripped Flutter's minWidth < double.infinity assertion.

🐛 Selection & Ellipsis

• text-overflow: ellipsis no longer leaks hidden text via copy — Fragment.ellipsisVisibleLength records how many leading characters survive each truncation pass; getSelectedText clamps the visible range against it and skips fully-suppressed fragments. State is reset at the top of every _performLineLayout so a wider re-layout un-hides text that was previously truncated.
• Selection drag is now lenient on edge overshoot — _lineIndexAt(dy, clampOutOfBounds: true) is used during handle drag, so a finger that drifts past the first/last line by a pixel snaps to the nearest line instead of freezing. Tap hit-testing (_findFragmentAtPosition) keeps the strict semantics.
• Dead _characterToFragment / _fragmentRanges fields removed — they were populated in _buildCharacterMapping each layout but never read. Layout micro-saving and one less GC pressure point.

🐛 Table

• Cell BlockNode content no longer disappears — when cellContentBuilder is null and a cell contains <div>/<p> children, _buildCellContent now renders the inline run plus each block child via a default Column/Text fallback. Previously only callers that went through HyperRenderWidget (which auto-supplies a builder) were safe.
• Total-cell cap _kMaxTotalCells = 100 000 — a pathological <table> whose rowCount × columnCount exceeds the cap now renders a visible "Table too large to render" placeholder instead of allocating an 8 MB null grid on the UI thread.

🐛 Animations

• HyperAnimatedWidget controller lifecycle hardened — switched from SingleTickerProviderStateMixin to TickerProviderStateMixin; the previous mixin asserted on the second createTicker() when didUpdateWidget recreated the controller. The start delay now uses a retained Timer that is cancelled on didUpdateWidget / dispose, eliminating duplicate forward() calls in fast-rebuild scenarios.

🧪 Tests

• +27 tests added across url_safety_test, animation_controller_race_test, table_review_fixes_test. Full sub-package suite green.

1.3.1 - 2026-05-14

✨ New CSS Properties

• list-style-type: All 11 values — disc, circle, square, decimal, decimal-leading-zero, lower-alpha, upper-alpha, lower-latin, upper-latin, lower-roman, upper-roman, none
• list-style-position: inside / outside (default)
• list-style shorthand: parses <type> <position> in any order
• background-repeat: repeat, repeat-x, repeat-y, no-repeat, space, round
• background-position: keyword (center, top left, etc.) and percentage values

🚀 Performance

• Selection rects cached: getSelectionRects() called once per drag event (was 3×); stored in _selectionRects field — eliminates redundant layout walks during selection drag
• Auto-scroll proportional speed: _autoScrollIfNearEdge now scales 0–20 px/frame based on finger distance from edge (was fixed 15 px/frame)
• HyperTeardropHandlePainter deduplicated: renamed to HyperTeardropHandlePainter, made public, and exported from core; duplicate in the virtualized overlay deleted

🐛 Bug Fixes

• Edge-to-edge images: _kImageMargin set to 0.0 — width: 100% images now truly fill their container with no internal margin offset

1.3.0 - 2026-05-03

✨ New Features

• HyperNodePlugin / HyperPluginRegistry (src/interfaces/node_plugin.dart): Plugin API for custom widget rendering of arbitrary HTML tag names. Block tier (full-width, CSS margins) and inline tier (flows with text, intrinsic-measured) supported.
• Plugin layout wiring (render_hyper_box.dart, render_hyper_box_layout.dart): blockPluginTags / inlinePluginTags sets added to RenderHyperBox with layout-invalidating setters. _tokenizeNode intercepts plugin tags; Step 1.7 _measureInlinePluginFragments() queries child intrinsic dimensions before line layout runs.
• Plugin widget wiring (hyper_render_widget.dart): pluginRegistry field added; _collectAtomicChildren checks plugin registry first; createRenderObject / updateRenderObject sync tag sets to the render object.
• CSS: Box shadow, linear-gradient, advanced border styles (dashed/dotted)
• CSS: Full Flexbox support (direction, wrap, gap, align-self, grow/shrink/basis)
• CSS: CSS Variables var(), transition, animation-* parsing
• CSS: computed_style expanded with 120+ additional properties
• CSS Grid: display: grid with grid-template-columns, span, gap
• Style: resolver.dart expanded — specificity engine, cascade improvements
• Widgets: HyperRenderWidget — adaptive selection colors, theme-aware; new enableComplexFilters flag to gate saveLayer calls for backdrop-filter/filter effects
• Widgets: HyperSelectionOverlay — improved handle rendering with tight bounding boxes
• Rendering: render_hyper_box_layout.dart — float algorithm improvements; O(1) _fragmentChildMap child lookup; O(1) _nodeRectCache accessibility rect lookup
• Rendering: render_hyper_box_paint.dart — retina-ready images, anti-aliasing
• Performance: _buildNodeRectCache() builds O(1) accessibility rects during layout (Step 8), depth-capped at 32 levels

♿ Accessibility (WCAG 2.1 AA)

• <img alt> → discrete SemanticsNode: Images with non-empty alt text now generate an individual SemanticsNode at the image's layout rect — VoiceOver/TalkBack users can navigate to images element-by-element (WCAG 1.1.1)
• aria-label honored on <a> elements: Anchor elements with aria-label now use that attribute as the link's accessible label instead of accumulated text content (WCAG 4.1.2)

🐛 Bug Fixes

• HyperRenderWidget compilation error: Resolved a signature mismatch in recursive widget construction where codeHighlighter was passed outside of config and pluginRegistry was missing
• Float layout: Explicit CSS width and height properties are now correctly respected for non-image float elements
• Plugin propagation: pluginRegistry is correctly passed to nested renderers, allowing custom tags to work inside floated containers
• Scroll vs. text-selection conflict: Removed PointerMoveEvent selection tracking from handleEvent — selection now initiated via LongPressGestureRecognizer at the widget layer
• Context menu outside hit-testable bounds: Positioned(top: menuY - 56) clamped to 0.0 — Copy button is always reachable near the top of the widget
• display:none not respected: Guard in _tokenizeNode — elements with display:none produce no layout fragments
• _TextPainterKey hash collision: Replaced Object.hash() int key with full value-equality struct — eliminates subtle layout glitches on large documents
• Inline images not loaded after async parse: document setter now calls _loadImages() when the render box is attached
• Image loading spinner invisible: frameBuilder no longer wraps the loadingBuilder placeholder in AnimatedOpacity(opacity:0) — TweenAnimationBuilder fade-in applied on first decoded frame instead
• Ruby selection — 5 bugs fixed: FragmentType.ruby was silently skipped in every selection pipeline step, causing character offset desynchronisation for all content after a ruby fragment
• LineInfo.characterCount: now counts ruby base-text characters (was 0 for ruby fragments)
• details_widget.dart: Fixed undefined DetailsNode class — field type changed to UDTNode with attributes.containsKey('open') for HTML-spec-compliant initial state
• Selection: getSelectedText() now inserts \n at block element boundaries so copied text respects paragraph/list structure
• Layout Bug 1: characterOffset no longer adds trimmedLeading to second fragment — selection mapping was off by the number of trimmed leading spaces
• Layout Bug 2: _sameLinkContext() guard prevents merging text nodes from different <a> ancestors — fixes incorrect link tap targets
• Layout Bug 3: _layoutFloat() early-returns when _maxWidth.isInfinite — prevents crash in unconstrained layouts; uses getMaxIntrinsicWidth/Height instead of child.layout() to eliminate double-layout
• Layout Bug 4: Null/empty guard in _measureFragments for fragment.text — no longer crashes on atomic/ruby fragments
• Memory: _disposeLinkRecognizers() called in document setter — fixes recognizer leak when document is replaced
• Nested decorations: nodeToDecorated changed from Map<UDTNode, UDTNode> to Map<UDTNode, List<UDTNode>> — inner spans no longer overwrite outer spans
• prefer_const_constructors: HyperPluginBuildContext construction changed to const

🔬 Tests

• +17 tests — ruby_layout_test.dart: LineInfo.characterCount with ruby, selection offset accumulation
• +27 tests — ruby_layout_test.dart: RubyNode model, Fragment.ruby lifecycle, document tree traversal
• +30 tests — float_layout_test.dart: HyperFloat/HyperClear enums, node construction, LineInfo insets
• +44 tests — text_breaking_test.dart: canBreak, isWhitespace, ComputedStyle overflow, CJK/Kinsoku
• +52 tests — layout_algorithm_test.dart: characterOffset regression, rect computation, link context
• +32 tests — details_element_test.dart: <details>/<summary> model and widget open/close behavior
• +53 tests — rtl_bidi_test.dart: HyperTextDirection, hyperDirection inheritance, Arabic/Hebrew text, RTL widget integration
• dart fix applied to test files: 73 prefer_const issues resolved — 0 analyzer issues

1.2.0 - 2026-03-30

• First stable release. Core UDT model, RenderObject engine, plugin interfaces.