htmltopdfwidgets 2.2.0

htmltopdfwidgets: ^2.2.0 copied to clipboard

• Rendering accuracy (new engine) - output now tracks what a browser renders far more closely:
  • Whitespace: browser-style collapsing. Adjacent inline elements (Word<b>glued</b>) are no longer split by an invented space, and whitespace between elements is kept. <br> inside a paragraph now breaks the line instead of being dropped.
  • Lists: nested lists render as nested lists instead of being flattened into the parent item's text. Supports type, start, reversed, value, list-style-type (decimal, alpha, roman, greek, disc/circle/square), and per-depth bullets. Task-list items show only their checkbox.
  • Tables: colspan/rowspan, block content in cells (paragraphs, lists, images), <caption>, cell/row CSS borders and backgrounds, valign/vertical-align, cellpadding, explicit column widths, content-weighted column widths, and repeating <thead> rows. border="0"/border: none removes the grid. A rowspan cell now covers all of its rows (spanned rows used to get empty bordered cells), the extra height of a tall spanning cell is spread over its rows as in a browser, and a page never breaks inside a rowspan group. vertical-align: top/bottom were swapped and now match the browser.
  • Margins: vertical margins collapse between siblings and through parents; browser-default margins for headings, paragraphs, lists, blockquotes and <pre> (headings scale with defaultFontSize).
  • <pre>/<code>: whitespace preserved, monospace (Courier) font, background and padding applied.
  • Inline: <sub>/<sup> baseline shifts, <small>, <big>, <ins>, <cite>, <kbd>, <font color/face/size>, <center>, <dl>/<dt>/<dd>; links stay clickable on nested formatting (<a><b>..</b></a>).
  • Images: sized at 1px = 0.75pt by default, margin: auto/text-align centering, per-side borders.
• MathML (#44): <math> renders natively — fractions (mfrac), sub/superscripts (msub, msup, msubsup), roots (msqrt, mroot), under/over scripts (munder, mover, munderover), fences (mfenced), matrices (mtable), tokens (mi, mn, mo, mtext, mspace), inline on the text baseline or centered with display="block" (or CSS display: block). Supports mstyle/mathcolor/mathsize/displaystyle, linethickness, mlabeledtr and MathML length units. Sum/product/integral signs are drawn as vector shapes; other symbols outside Latin-1 use fontFallback fonts, or readable text fallbacks (pi, <=) when none are given.
• CSS:
  • <style> blocks now support descendant/child/sibling combinators, attribute selectors, structural pseudo-classes (:first-child, :nth-child(odd), ...), specificity ordering and !important. Multi-value declarations (margin: 0 auto) are no longer truncated, and stylesheet values go through the same parser as inline styles (units were previously ignored).
  • Presentational attributes (width, bgcolor, align, ...) now sit below author CSS in the cascade, as in browsers.
  • All 148 CSS named colors with spec values (e.g. red is #FF0000, navy is #000080), #rgb/#rgba/#rrggbbaa, rgb()/rgba() with percentages or space syntax, hsl()/hsla().
  • Longhands: margin-*, padding-*, border-top/right/bottom/left, border-width/color/style, background, font shorthand, text-decoration-color/style and combined decorations.
  • em/%/keyword font sizes resolve against the parent; numeric font-weight (600+ is bold); line-height (unitless, %, length; inherited); letter-spacing; text-transform; white-space; vertical-align: super/sub; mm, cm, pc, ex, ch units.
• Defaults: HtmlTagStyle.codeBlockBackgroundColor (inline <code>) and codeblockColor (<pre> background) now default to light grey instead of red/mid-grey. Links default to browser blue (#0000EE), <th> is bold and centered with no forced background, and <blockquote> is no longer italic.
• Removed debug print output from the new engine.
• README: install snippet on 2.2.0, table and CSS support sections, and the extended tag matrix.

• Branding & Documentation:
  • Updated package logo with a modern, futuristic design.
  • Fixed broken "Buy Me a Coffee" icon on pub.flutter-io.cn by using a more stable button URL.
  • Improved README branding and asset link stability for better pub.flutter-io.cn compatibility.

• Layout-First Rendering Engine: Major architectural refactor for Chrome-like PDF accuracy.
  • Calculated Constraints: Every element now undergoes a virtual layout pass to resolve CSS Box Model constraints (padding, border, margin) before widget generation.
  • Standardized Unit Conversion: Implemented $1px = 0.75pt$ scaling to ensure PDF layouts precisely match browser/web views.
  • Native Flexbox Support: Added display: flex support with mapping to pw.Flex. Supports flex-grow, flex-direction, justify-content, and align-items.
  • Enhanced Table Support: Tables now support repeating headers across pages, cell alignment, and native PDF borders/backgrounds.
  • Improved Page Spanning: Refined block detection to allow long content (paragraphs, blockquotes, headers) to bridge across pages without "exceeded page height" errors.
• Refactored Codebase: Decoupled parsing (HtmlParser), layout calculation (LayoutSolver), and PDF construction (PdfBuilder) for better extensibility.

• Fixes:
  • (#63) feat: add .gitignore and remove ignored files by @alihassan143
  • (#63) fix: fixed issue of pdf generation when text for table cell is very long by @AbhishekDoshi26
  • (#63) fix: fixed pipeline by @AbhishekDoshi26
  • (#63) fix: removed whitespace in paragraph starting by @AbhishekDoshi26
  • (#63) fix: fixed column header background color by @AbhishekDoshi26
  • (#61) feat: Update legacy HTML to widgets and browser PDF builder, generating new test and example PDF outputs by @AbhishekDoshi26.

• New Architecture: Introduced a "Browser Rendering Engine" architecture for more robust HTML to PDF conversion.
  • Style Engine: Comprehensive CSS parsing and cascading support.
  • Render Tree: Intermediate DOM representation with fully computed styles.
  • PDF Builder: Modular PDF widget generation with better layout handling.
• Unified API: Updated HTMLToPdf.convert to support the new engine via useNewEngine: true.
• Checkbox Enhancements:
  • Fixed inline rendering of checkboxes (now flow with text).
  • Improved vertical alignment (centered by default, respects vertical-align).
• Multi-Language Support:
  • Added textDirection support for RTL languages (Arabic, Hebrew).
  • Added fontFallback support for Emojis and complex scripts in the new engine.
• Enhanced Element Support:
  • Improved Table rendering with full CSS support (borders, padding, background).
  • Better List handling (nested lists, custom bullets).
  • Support for blockquote, pre, code, hr, checkbox, and more.
• Rendering Improvements:
  • Fixed inline content rendering (bold, italic, mixed text).
  • Fixed list item text visibility.
  • Optimized default spacing to match legacy engine.
• Custom Styles: Added full support for HtmlTagStyle in the new engine.
• Robustness: Improved error handling for images and fonts.
• Legacy Support: Maintained full backward compatibility with the legacy engine (default).

• Checkbox Enhancements:
  • Fixed inline rendering of checkboxes (now flow with text).
  • Improved vertical alignment (centered by default, respects vertical-align).
• Multi-Language Support:
  • Added textDirection support for RTL languages (Arabic, Hebrew).
  • Added fontFallback support for Emojis and complex scripts in the new engine.
• Robustness:
  • Improved error handling for images and fonts.

• New Architecture: Introduced a "Browser Rendering Engine" architecture for more robust HTML to PDF conversion.
  • Style Engine: Comprehensive CSS parsing and cascading support (lib/src/browser/css_style.dart).
  • Render Tree: Intermediate DOM representation with fully computed styles (lib/src/browser/render_node.dart).
  • PDF Builder: Modular PDF widget generation with better layout handling (lib/src/browser/pdf_builder.dart).
• Unified API: Updated HTMLToPdf.convert to support the new engine via useNewEngine: true.
• Enhanced Support:
  • Improved Table rendering with full CSS support (borders, padding, background).
  • Better List handling (nested lists, custom bullets).
  • Support for blockquote, pre, code, hr, checkbox, and more.
• Rendering Improvements:
  • Fixed inline content rendering (bold, italic, mixed text).
  • Fixed list item text visibility.
  • Optimized default spacing to match legacy engine.
• Custom Styles: Added full support for HtmlTagStyle in the new engine.
• Legacy Support: Maintained full backward compatibility with the legacy engine (default).

• *(#52) fix css color parsing

• Fix markdown table issue and added more markdown properties modifiers

*(#46) Add support for local image files

• added support for horizontal divider
• code block and pre tag support

• fix: Links get formatted but are not clickable in the PDF (#35)

• fix nested child skipping issue fixed

• added wrap in paragraph element feature for html text

• Markdown to pdf support added

• Fix wrong styles of background color (#31)
• Add support for custom fonts (#34) by @hig-dev

• Intial support for checkboxes *(#25)

• update readme *(#20)

• update readme

• fix line break
• fix Can't manage to render colors
• text alignment feature added

• fix internal css decoration not working

• optimiz parse logic
• documentation fixs
• using override dependency for pdf due to underline and italic issues
• update readme

• optimiz parse logic
• documentation fixs
• using override dependency for pdf due to underline and italic issues

• support for html table tag added

• update reamdme.md

• support custom styles

• support for dart sdk
• nested elements children support

• multiple styles on same text
• font fallback and font added

• missing image element added

• optimization

• depedency updates

• network image fixes.

• Describe initial release.