may-tas/TextEditingApp

Implement Advanced Undo/Redo with Visual History Timeline

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#113 opened on Oct 1, 2025

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 (41 comments) (0 reactions) (2 assignees)Dart (35 forks)auto 404
enhancementgssoc25hacktoberfestlevel3no-issue-activity

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 (19 stars)
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Description

Problem

The current undo/redo system is basic and doesn't provide users with a clear view of their editing history. Users can't see what changes will be undone/redone or jump to specific points in history.

Solution

Implement a visual timeline that shows:

  • Thumbnail previews of canvas states
  • Timestamps of changes
  • Ability to jump to any point in history
  • Branching history for complex editing workflows

Acceptance Criteria

  • Visual timeline widget in the UI
  • Thumbnail generation for canvas states
  • Jump-to functionality
  • History branching support
  • Performance optimization for large histories

Technical Details

  • Use RepaintBoundary for efficient thumbnail generation
  • Implement history as a tree structure instead of linear list
  • Add state diffing to avoid storing full states

Contributor guide

Research direction
Investigate the current undo/redo implementation in the codebase. Look for existing history management and UI components. Study Flutter's RepaintBoundary for thumbnails and explore tree data structures for branching. Check if there are any related PRs or discussions to understand the intended design.
Tech stack
dart
Domain
frontend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitDartFlutter
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20