rx-html: Resolve naming conflicts between HTML and SVG attributes #3986

xerial · 2025-07-19T15:38:29Z

Summary

This PR implements issue #3953 to resolve naming conflicts between HTML and SVG attributes in the rx-html library, enabling seamless integration of both attribute sets.

Problem

Previously, developers couldn't easily import both HTML and SVG tags/attributes together using import wvlet.airframe.rx.html.all.* due to naming conflicts for common attributes like style, class, title, etc.

Solution

Created a new UnifiedTags trait that intelligently handles conflicts
Added unifiedAll object that can be imported to use both HTML and SVG together
SVG conflicting attributes are prefixed with 'svg' (e.g., svgStyle, svgClass)
Uses Scala 3's export statements for selective imports

Key Changes

Fixed SVG namespace handling - Enabled proper SVG namespace for all attributes
Created conflict resolution mechanism - Prefixed SVG versions for conflicts
Added unified import - New unifiedAll object for combined usage
Comprehensive tests - Added test suite verifying the functionality
Documentation - Created README with examples and conflict mapping

Usage Example

import wvlet.airframe.rx.html.unifiedAll.*

div(
  cls -> "container",           // HTML class
  style -> "padding: 20px;",    // HTML style
  svg(
    svgWidth -> "400",          // SVG width
    svgHeight -> "300",         // SVG height
    svgClass -> "chart",        // SVG class
    svgStyle -> "fill: blue;",  // SVG style
    circle(cx -> "50", cy -> "50", r -> "40")
  )
)

Test plan

Added UnifiedTagsTest.scala with comprehensive tests
All existing tests pass
Verified proper namespace assignment for attributes
Tested combined HTML/SVG usage scenarios

🤖 Generated with Claude Code

) This commit implements a solution for seamless integration of HTML and SVG attributes by introducing a unified import mechanism that resolves naming conflicts. ## Changes: - Fixed SVG namespace handling by properly implementing the attr function in HtmlSvgAttrs - Created UnifiedTags trait that uses Scala 3 export statements to selectively import non-conflicting members - Added prefixed versions (svg*) for all conflicting attributes and tags - Introduced `unifiedAll` object for importing both HTML and SVG without conflicts - Uncommented previously disabled SVG attributes (height, width, id) ## Conflict Resolution: - Simple attribute conflicts (class, style, type, etc.): SVG versions get 'svg' prefix - Tag/attribute conflicts (title, pattern, filter, etc.): Clear naming to distinguish usage - Maintains backward compatibility by keeping HTML versions as defaults ## Testing: - Added comprehensive test suite in UnifiedTagsTest.scala - Tests verify combined HTML/SVG usage, namespace assignment, and conflict resolution - All existing tests continue to pass ## Documentation: - Created README.md with usage examples and complete conflict mapping - Added inline documentation explaining the approach This allows developers to write: ```scala import wvlet.airframe.rx.html.unifiedAll.* div( cls -> "container", // HTML class svg( svgClass -> "chart", // SVG class svgWidth -> "400" // SVG width ) ) ``` 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>

gemini-code-assist

Summary of Changes

Hello @xerial, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the rx-html library by resolving long-standing naming conflicts between HTML and SVG attributes and tags. It introduces a new unifiedAll import that provides a seamless way to combine HTML and SVG elements within the same Scala code, making it much easier for developers to build rich, mixed-content user interfaces. The solution intelligently handles attribute and tag name clashes by introducing svg prefixes for SVG-specific elements, ensuring proper rendering and maintainability.

Highlights

Unified Import Mechanism: Introduced a new unifiedAll import object that allows developers to use both HTML and SVG tags and attributes simultaneously without naming conflicts, simplifying mixed-content UI development.
Conflict Resolution Strategy: Implemented a clear conflict resolution strategy where SVG attributes and tags that clash with HTML counterparts are prefixed with svg (e.g., svgClass, svgStyle, svgTitle), ensuring distinct and unambiguous usage.
Correct Namespace Handling: Ensured that all HTML and SVG attributes and tags are correctly assigned their respective namespaces (XHTML for HTML, SVG for SVG), which is crucial for proper rendering and browser compatibility.
Comprehensive Testing & Documentation: Added a dedicated test suite (UnifiedTagsTest.scala) to thoroughly validate the new unified import and conflict resolution, alongside updated README.md documentation with usage examples and a detailed conflict mapping.

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gemini-code-assist

Code Review

This pull request introduces a unifiedAll import to resolve naming conflicts between HTML and SVG attributes and tags in rx-html. The solution uses Scala 3's export feature to selectively import non-conflicting members and provides prefixed versions for conflicting ones. The changes are supported by documentation in README.md and unit tests.

My review includes suggestions for improvement:

Removing a leftover development comment in UnifiedTags.scala.
Improving a test case in UnifiedTagsTest.scala to more accurately reflect the specific conflict being resolved.

gemini-code-assist · 2025-07-19T15:40:55Z

airframe-rx-html/src/main/scala/wvlet/airframe/rx/html/UnifiedTags.scala

+
+// Object moved to syntaxes.scala


This comment // Object moved to syntaxes.scala appears to be a leftover from development. It can be removed to improve the clarity of this new file.

gemini-code-assist · 2025-07-19T15:40:55Z

airframe-rx-html/src/test/scala/wvlet/airframe/rx/html/UnifiedTagsTest.scala

+  test("should handle conflicting tag names correctly") {
+    import unifiedAll.*
+
+    // HTML title in HtmlTagsExtra
+    val htmlTitle = tags_extra.title
+
+    // SVG title element
+    val svgTitleElement = svgTitle("This is a tooltip")
+
+    // They should be different elements with different namespaces
+    assert(htmlTitle.name == "title")
+    assert(htmlTitle.namespace == Namespace.xhtml)
+
+    // SVG title should have SVG namespace
+    svgTitleElement match {
+      case elem: HtmlElement =>
+        assert(elem.name == "title")
+        assert(elem.namespace == Namespace.svg)
+    }
+  }


The test should handle conflicting tag names correctly and its use of tags_extra.title could be a bit misleading. The conflict resolved by this PR for title is between the HTML title attribute (from HtmlAttrs) and the SVG title tag (from svgTags).

The current test compares two different tags (tags_extra.title and svgTitle) but doesn't verify how unifiedAll resolves the attribute/tag conflict for the name title.

A more direct test would check that title from unifiedAll resolves to the HTML attribute, while svgTitle resolves to the SVG tag. This would more accurately validate the conflict resolution mechanism.

test("should resolve conflict between HTML title attribute and SVG title tag") { import unifiedAll.* // `title` from unifiedAll should be the HTML attribute val htmlAttribute = title -> "This is an HTML attribute" htmlAttribute match { case attr: HtmlAttribute => assert(attr.name == "title") assert(attr.namespace == Namespace.xhtml) case other => fail(s"Expected HtmlAttribute, but got ${other}") } // `svgTitle` should be the SVG tag val svgElement = svgTitle("This is an SVG title element") svgElement match { case elem: HtmlElement => assert(elem.name == "title") assert(elem.namespace == Namespace.svg) case other => fail(s"Expected HtmlElement, but got ${other}") } }

- Format UnifiedTags.scala with proper indentation and alignment - Format test files with consistent style - Remove export syntax that's incompatible with scala213source3 dialect - Fix typos in SVG tag names (feDistantLighting, feSpotlight, feTurbulance) - Remove deprecated font SVG tag 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>

github-actions bot added the doc Documentation task label Jul 19, 2025

gemini-code-assist bot reviewed Jul 19, 2025

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rx-html: Resolve naming conflicts between HTML and SVG attributes #3986

rx-html: Resolve naming conflicts between HTML and SVG attributes #3986

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xerial commented Jul 19, 2025

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xerial commented Jul 19, 2025

Summary

Problem

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Key Changes

Usage Example

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