cdk_process(3)

💖 cdk_process — bestie, it's giving Cdk widget pre/post-processing 💖

okay so real talk, this is cdk_process(3) from the Cdk library calls, and it's literally the glow-up your widget's input handling has been waiting for. no cap. ✨

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🌸 NAME 🌸

cdk_process — Cdk widget pre/post-processing 🎀

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🦋 SYNOPSIS 🦋

Perform pre- and post-processing of data which is injected into a widget.

like. that's the whole vibe. you're intercepting the data going in and the aftermath going out. iconic behavior honestly. 💅

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✨ DESCRIPTION ✨

So here's the tea, bestie. ☕ Character input is handled by each widget by its injection function. And that injection function? It's typically a large case-statement consisting of the actions to be taken for editing and scrolling keys. Big girl. Lots of branches. She's doing the most, and we love her for it. 💖

But plot twist: the calling application can modify the behavior of the injection function by defining either or both preprocess and postprocess functions. Not one, not the other — either or both. choose your fighter, or honestly, choose both, main character energy. 👑

🔮 preprocessing (the before times)

Preprocessing is performed before doing anything with the injected keystroke. So like, before the widget even looks at it. 🙈

🚨 If the preprocess function returns zero, no further action is taken in the injection function. Like, door's closed, party's over, go home. 😭

And ngl, note that the preprocess function may do more than filter out characters — it can fill in logic to coordinate different widgets. So it's not just a bouncer at the door, it's like, a whole event planner. She's networking. She's connecting widgets to each other. lowkey powerful. 🫶

🌈 postprocessing (the after party)

Postprocessing is performed after all other actions have been done in the injection function. Cleanup crew. Closing shift. ✨

Like the other actions, it is performed only if the preprocess function returns a nonzero value. So remember: preprocess says yes, postprocess gets to play. 💫

And unlike the preprocess function, its return value is ignored. Bestie said her opinion does not matter and she's at peace with it. 💀

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👑 SEE ALSO 👑

• cdk(3)
• cdk_binding(3)

go read those too, iykyk 🦋

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and that's the whole page, bestie!! 💜 this one's from 2024-03-28, sourced from the Cdk library — mwah, no notes, slay, periodt. 🎀✨