Mailspring/docs/contributing-to-packages.md
Ben Gotow 1e8fd46342 fix(drafts): Various improvements and fixes to drafts, draft state management
Summary:
This diff contains a few major changes:

1. Scribe is no longer used for the text editor. It's just a plain contenteditable region. The toolbar items (bold, italic, underline) still work. Scribe was causing React inconcistency issues in the following scenario:
   - View thread with draft, edit draft
   - Move to another thread
   - Move back to thread with draft
   - Move to another thread. Notice that one or more messages from thread with draft are still there.

There may be a way to fix this, but I tried for hours and there are Github Issues open on it's repository asking for React compatibility, so it may be fixed soon. For now contenteditable is working great.

2. Action.saveDraft() is no longer debounced in the DraftStore. Instead, firing that action causes the save to happen immediately, and the DraftStoreProxy has a new "DraftChangeSet" class which is responsbile for batching saves as the user interacts with the ComposerView. There are a couple big wins here:

   - In the future, we may want to be able to call Action.saveDraft() in other situations and it should behave like a normal action. We may also want to expose the DraftStoreProxy as an easy way of backing interactive draft UI.

   - Previously, when you added a contact to To/CC/BCC, this happened:

     <input> -> Action.saveDraft -> (delay!!) -> Database -> DraftStore -> DraftStoreProxy -> View Updates

Increasing the delay to something reasonable like 200msec meant there was 200msec of lag before you saw the new view state.

To fix this, I created a new class called DraftChangeSet which is responsible for accumulating changes as they're made and firing Action.saveDraft. "Adding" a change to the change set also causes the Draft provided by the DraftStoreProxy to change immediately (the changes are a temporary layer on top of the database object). This means no delay while changes are being applied. There's a better explanation in the source!

This diff includes a few minor fixes as well:

1. Draft.state is gone—use Message.object = draft instead
2. String model attributes should never be null
3. Pre-send checks that can cancel draft send
4. Put the entire curl history and task queue into feedback reports
5. Cache localIds for extra speed
6. Move us up to latest React

Test Plan: No new tests - once we lock down this new design I'll write tests for the DraftChangeSet

Reviewers: evan

Reviewed By: evan

Differential Revision: https://review.inboxapp.com/D1125
2015-02-03 16:24:31 -08:00

1.9 KiB

Contributing to Official Atom Packages

If you think you know which package is causing the issue you are reporting, feel free to open up the issue in that specific repository instead. When in doubt just open the issue here but be aware that it may get closed here and reopened in the proper package's repository.

Hacking on Packages

Cloning

The first step is creating your own clone.

For example, if you want to make changes to the tree-view package, fork the repo on your github account, then clone it:

> git clone git@github.com:your-username/tree-view.git

Next install all the dependencies:

> cd tree-view
> apm install
Installing modules ✓

Now you can link it to development mode so when you run an Atom window with atom --dev, you will use your fork instead of the built in package:

> apm link -d

Running in Development Mode

Editing a package in Atom is a bit of a circular experience: you're using Atom to modify itself. What happens if you temporarily break something? You don't want the version of Atom you're using to edit to become useless in the process. For this reason, you'll only want to load packages in development mode while you are working on them. You'll perform your editing in stable mode, only switching to development mode to test your changes.

To open a development mode window, use the "Application: Open Dev" command, which is normally bound to cmd-shift-o. You can also run dev mode from the command line with atom --dev.

To load your package in development mode, create a symlink to it in ~/.atom/dev/packages. This occurs automatically when you clone the package with apm develop. You can also run apm link --dev and apm unlink --dev from the package directory to create and remove dev-mode symlinks.

Installing Dependencies

You'll want to keep dependencies up to date by running apm update after pulling any upstream changes.