This Engineering Notebook post brags about progress in improving Leo's syntax coloring. This <https://groups.google.com/g/leo-editor/c/flHyJjO2YIA/m/m7MSpYp_CgAJ>thread discussed my first thoughts.
PR #4204 <https://github.com/leo-editor/leo-editor/pull/4203> contains the code. It: - Generalizes the syntax (code pattern) established by @language jupytext. - Adds two semantics methods to the jedit class. - Adds new rules (functions) for html elements in three *mode files*: html.py, css.py, and javascript.py. This excellent strategy appeared after many happy hours of experimentation. *Semantics* The PR adds two new semantic methods: jedit.*push_delegate* and jedit. *pop_delegate* and modifies an existing semantic method, jedit. *match_at_language*. These methods are tricky because they must alter the (complex!) state of the jedit class. These methods hide all such complexity from the rule functions in the mode files. *Rule functions* The PR adds new rules for *html *elements to the three mode files. Rules for: <script>, </script>, <style>, </style> *replace* the corresponding *delegated rule sets* in each mode file! In other words, the PR greatly reduces the scale of delegation. These new rules follow a straightforward pattern: - Rules for <style> and <script> color the element and call push_delegate. - Rules for </style> and </script> color the element and call pop_delegate. - Rules for @language color the directive and call match_at_language. This is how it is written in The Book. *Summary* New html *rules* replace entire rule *sets* in html.py, css.py, and javascript.py. These mode files now use the "delegate" kwarg *only* to colorize single html elements! The semantics methods hide all the heavy lifting from the rule methods. The PR must still fix all semantic edge cases. In the end, everything will look effortless. Edward -- You received this message because you are subscribed to the Google Groups "leo-editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/leo-editor/8a7a7bdb-6c6c-455b-a3de-097439c38386n%40googlegroups.com.
