this is the event handling code for mouse selection.

#devlog #tukan

mouse selection

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more navigation, text input, selection...

small refactoring feels fine so far, but i haven't had big challenges yet.

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we have a cursor and it can be moved around.

it emulates monaco behavior: the cursor is vertical and blinks at a change rate of 0.5s. blinking resets on movement. horizontal movement sets an implicit ruler that vertical movement attempts to match when switching lines.

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we are now rendering a text document from a gapbuffer to the GPU. it's a direct stream-and-parse, there is no line analysis or anything.

presently, it happens only when the window is resized, because we're not interactive otherwise.

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a very emotional experience, this.

as long as i struggle to express a concept and find bugs on top, i'm feeling like "perhaps all this was a fatal mistake and i am a deeply flawed human being"

but then the bugs are fixed and i also end up with something elegant and feel instant relief and redemption.

and repeat.

which is no way to be. it's nerve wracking.

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took a while to figure it out but now i have something nice to query, observe and change cursor offset. it's done with a virtual table (not the same as a virtual table in C++).

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got loading text -> gap buffer done, which involves a UTF-8 -> UTF-32 conversion.

also added a bunch of other editing operations.

https://git.sr.ht/~duangle/tukan/tree/master/item/src/gapbuffer.n

what's not clear yet is how to build the interface for this. particularly "read value then change value" moves against DAG scheduling (change value then read value).

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