Contd. from #21943

Emmet Actions:

• Increment/Decrement by n
• Evaluate Math Expression
• Toggle Comment
• Multi cursor support for Wrap with abbreviation and Expand abbr commands Wrap with abbreviation and Expand abbr commands do not work with multiple cursors #27621

Port current Emmet customizations to the new model:

• Emmet: Expand Abbreviation command in languages that are not supported by emmet explicitly like php 1.13.0 | New Emmet expansion suggestions don't honor emmet.syntaxProfiles setting #28286
• Port customization of output profile
• Port customization of variables in emmet snippet. In new emmet, this will be via a new setting emmet.variables
• Port the use of emmet.extensionsPath for custom variables and profiles "emmet.extensionsPath" incompatible with "emmet.useNewEmmet": true #28465
• Port the use of emmet.exlcudeLanguages

Optimize Emmet expansions

• Use right language in case of embedded language. For eg: <style> block in html should use css Emmet css abbreviation not expanded in style block in html file #28039
• Use regex to filter out invalid abbreviations. Invalid emmet abbr returns weird expanded value in css files #27628 and Emmet resolves invalid format #27975
• Dont provide emmet suggestion inside the html tag or inside css selectors New Emmet completes html attribute as tag #28829
• Use VS Code specific stream reader for more efficient html and css parser
• Enable language extensions to call emmet completion provider Enable language extensions to call emmet completion provider #29114

Others:

• Add typings

Deferred Emmet Actions:

• Update Image Size (Pending resolution of Pull image-size and locate-file out of atom-plugin and into their own module emmetio/atom-plugin#21)
• Reflect CSS Value (No re-usable module from emmet yet. We should probably do this on our own)