MacDownApp/macdown

Rendering pane flashing

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#1104 opened on Nov 18, 2019

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 (77 comments) (91 reactions) (0 assignees)Objective-C (7,686 stars) (930 forks)batch import
bughelp wanted

Description

Upgraded to 0.7.2 today and the rendering pane is flashing on almost every keypress: https://i.imgur.com/F7OTGhH.mp4

It seems to happen with every combination of themes and syntax highlighting I've tried.

Contributor guide

Tech stack
objective c
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Objective CmacOS developmentAppKit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the rendering pane code in MacDown, specifically the changes introduced in version 0.7.2 that might cause flickering. Look at the code for the preview pane rendering loop, possibly in MDPreviewViewController or similar. Check if any overdraw or inefficient redraw occurs. Also review comments on issue #1104 for clues from users and maintainers.