History & modal text editing

Some brief notes of the process of creating and editing text layers with special consideration of the history system. A separate path is described for creating a text layer but then committing with no text, as well as creating a text layer that will replace the initial "placeholder" layer of a new document.

create text layer, but then abort

• clicking canvas
• event: createTextLayer
  • addLayer PUSH HIST STATE
• ESC no text
• event deleteTextLayer
  • removeLayer PUSH HIST STATE BUT THEN RESETS IT

normal path (works.. but I if we ever fix the abort-path, it could affect the WAY this works, in that history state should be added only after commit)

• clicking canvas
• event: createTextLayer
  • addLayer PUSH HIST STATE
• type text then ESC
• event: historyState
  • recognized as "current" and ignored
• event: make
  • resetLayer AMEND HIST STATE

edit existing path (works almost great)

• click text layer with text tool
• update text, hit ESC
• event: historyState
  • PUSH history state
• event: set
  • resetLayer AMEND HISTORY STATE (except actually would be cooler to MARRY history instead of AMEND? this is a subtle difference, essentially works only if the pre is a rogue state?)

"First Layer Replace"

• normal (works same as above)
• w/ abort (hacky in a similar way - it UPDATES the document)