In the Auto-Completion section of Settings-Preferences I added this matched pair: 【 】 (often used in Japanese dictionaries). But it didn't work. When I type the opening bracket (U+3010), the closing bracket does not appear.
What am I doing wrong?
Some test shows that it seems only support ASCII characters, and only typable characters, paste ones don't count, I guess it was done by listen to keydown event
Nope, it triggers on the notification Scintilla sends. Did you add the Unicode character as an entity (& # 3010 ;)?