Change Details

To help communities use translated SVGs created by #svg_translate_tool, Parser should by default use page language for thumbnails. Currently, the default language is used unless the user explicitly specifies a language, e.g. `[[File:Foo.svg|lang=sq]]`. The full discussion of how this could look is at {T202181}, the technical plan is the following: * Create a way for `Parser::makeImage` to let the media handler to know page's content language, as controlled by a feature flag. * Because varying all SVGs for all languages would generate a lot of distinct thumbnail URLs and thus create a huge load on caches and scalers, `SvgHandler` should be aware of languages actually present in the image and not create image URLs varied by languages needlessly. ** **Caveat**: this requires loading image metadata, need to make sure performance will not suffer. **Potential production impact**: while currently most SVG thumbnails are in form of `https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Neural_crest.svg/450px-Neural_crest.svg.png` i.e. using default language, this change will result in more language-specific thumbs like `https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Neural_crest.svg/langru-450px-Neural_crest.svg.png`. * Currently, ~2.6% of files on Commons are SVGs. * Current number of translated ones of them is negligible, but this project aims to increase this number. * The plan above requires that language-specific URLs will be generated only when a translation in the requested language is present.

To help communities use translated SVGs created by #svg_translate_tool, Parser should by default use page language for thumbnails. Currently, the default language is used unless the user explicitly specified a language, e.g. `[[File:Foo.svg|lang=sq]]`. The full discussion of how this could look is at {T202181}, the technical plan is the following: * Create a way for `Parser::makeImage` to let the media handler to know page's content language, as controlled by a feature flag. * Because varying all SVGs for all languages would generate a lot of distinct thumbnail URLs and thus create a huge load on caches and scalers, `SvgHandler` should be aware of languages actually present in the image and not create image URLs varied by languages needlessly. ** **Caveat**: this requires loading image metadata, need to make sure performance will not suffer. **Potential production impact**: while currently most SVG thumbnails are in form of `https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Neural_crest.svg/450px-Neural_crest.svg.png` i.e. using default language, this change will result in more language-specific thumbs like `https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Neural_crest.svg/langru-450px-Neural_crest.svg.png`. * Currently, ~2.6% of files on Commons are SVGs. * Current number of translated ones of them is negligible, but this project aims to increase this number. * The plan above requires that language-specific URLs will be generated only when a translation in the requested language is present.

To help communities use translated SVGs created by #svg_translate_tool, Parser should by default use page language for thumbnails. Currently, the default language is used unless the user explicitly specifiesd a language, e.g. `[[File:Foo.svg|lang=sq]]`. The full discussion of how this could look is at {T202181}, the technical plan is the following: * Create a way for `Parser::makeImage` to let the media handler to know page's content language, as controlled by a feature flag. * Because varying all SVGs for all languages would generate a lot of distinct thumbnail URLs and thus create a huge load on caches and scalers, `SvgHandler` should be aware of languages actually present in the image and not create image URLs varied by languages needlessly. ** **Caveat**: this requires loading image metadata, need to make sure performance will not suffer. **Potential production impact**: while currently most SVG thumbnails are in form of `https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Neural_crest.svg/450px-Neural_crest.svg.png` i.e. using default language, this change will result in more language-specific thumbs like `https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Neural_crest.svg/langru-450px-Neural_crest.svg.png`. * Currently, ~2.6% of files on Commons are SVGs. * Current number of translated ones of them is negligible, but this project aims to increase this number. * The plan above requires that language-specific URLs will be generated only when a translation in the requested language is present.