Patch #43845
closed
Remove the Raphael.js dependency by switching to SVG API
Description
This issue proposes removing Redmine's dependency on Raphael.js.
The attached patch removes Raphael.js loading and related code, and unifies rendering on direct SVG drawing.
Background¶
- The latest Raphael.js release is 2.3.0 (Aug 14, 2019).
- Raphael.js was historically useful for SVG/VML compatibility, but VML is already deprecated, and Redmine no longer supports Internet Explorer.
- In Redmine, Raphael.js is currently used only for relatively simple features, such as rendering the revision graph and some lines in the Gantt chart.
Proposal¶
- Remove Raphael.js loading and related code
- Switch to direct SVG generation in JavaScript
This should reduce frontend dependencies and improve long-term maintainability.
Screenshots¶
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Files
Related issues
Updated by Mizuki ISHIKAWA 25 days ago
- File revision-graph-colors-before-change.png revision-graph-colors-before-change.png added
- File revision-graph-colors-after-change.png revision-graph-colors-after-change.png added
Raphael.js had a color-selection method called getColor(), and revision graph colors were determined by that method.
0001-Replace-library-dependent-SVG-rendering-with-a-nativ.patch changes the color-selection logic, so the exact colors may differ slightly, but color distinguishability should remain sufficient.
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Updated by Go MAEDA 25 days ago
- Target version set to Candidate for next major release
In Redmine, Raphael.js was added in 2011. At that time, it was used to show revision graphs in the repository browser (#5501). Later, in 2013, it was also used to draw the progress line (#12122) and issue relations (#3436) in the Gantt chart.
At that time, Redmine needed to support older versions of Internet Explorer, such as IE8, which did not support SVG. Raphael.js worked across different browsers by using SVG in modern browsers and VML in older versions of Internet Explorer, so it was a reasonable choice.
Today, there is no longer a need to support Internet Explorer. Modern browsers provide consistent native support for SVG, so the compatibility-related need for Raphael.js is now very small.
Updated by Go MAEDA 25 days ago
- Blocks Patch #43800: Manage third-party license files in doc/licenses directory added
Updated by Marius BĂLTEANU 25 days ago
- Target version changed from Candidate for next major release to 7.0.0