#### Is this adding or improving a _feature_ or fixing a _bug_?
Improvement / debt.
#### What's the new behavior?
This pull request removes the `Change` object as we know it, and folds all of its behaviors into the new `Editor` controller instead, simplifying a lot of the confusion around what is a "change vs. editor" and when to use which. It makes the standard API a **lot** nicer to use I think.
---
###### NEW
**The `editor.command` and `editor.query` methods can take functions.** Previously they only accepted a `type` string and would look up the command or query by type. Now, they also accept a custom function. This is helpful for plugin authors, who want to accept a "command option", since it gives users more flexibility to write one-off commands or queries. For example a plugin could be passed either:
```js
Hotkey({
hotkey: 'cmd+b',
command: 'addBoldMark',
})
```
Or a custom command function:
```js
Hotkey({
hotkey: 'cmd+b',
command: editor => editor.addBoldMark().moveToEnd()
})
```
###### BREAKING
**The `Change` object has been removed.** The `Change` object as we know it previously has been removed, and all of its behaviors have been folded into the `Editor` controller. This includes the top-level commands and queries methods, as well as methods like `applyOperation` and `normalize`. _All places that used to receive `change` now receive `editor`, which is API equivalent._
**Changes are now flushed to `onChange` asynchronously.** Previously this was done synchronously, which resulted in some strange race conditions in React environments. Now they will always be flushed asynchronously, just like `setState`.
**The `render*` and `decorate*` middleware signatures have changed!** Previously the `render*` and `decorate*` middleware was passed `(props, next)`. However now, for consistency with the other middleware they are all passed `(props, editor, next)`. This way, all middleware always receive `editor` and `next` as their final two arguments.
**The `normalize*` and `validate*` middleware signatures have changed!** Previously the `normalize*` and `validate*` middleware was passed `(node, next)`. However now, for consistency with the other middleware they are all passed `(node, editor, next)`. This way, all middleware always receive `editor` and `next` as their final two arguments.
**The `editor.event` method has been removed.** Previously this is what you'd use when writing tests to simulate events being fired—which were slightly different to other running other middleware. With the simplification to the editor and to the newly-consistent middleware signatures, you can now use `editor.run` directly to simulate events:
```js
editor.run('onKeyDown', { key: 'Tab', ... })
```
###### DEPRECATED
**The `editor.change` method is deprecated.** With the removal of the `Change` object, there's no need anymore to create the small closures with `editor.change()`. Instead you can directly invoke commands on the editor in series, and all of the changes will be emitted asynchronously on the next tick.
```js
editor
.insertText('word')
.moveFocusForward(10)
.addMark('bold')
```
**The `applyOperations` method is deprecated.** Instead you can loop a set of operations and apply each one using `applyOperation`. This is to reduce the number of methods exposed on the `Editor` to keep it simpler.
**The `change.call` method is deprecated.** Previously this was used to call a one-off function as a change method. Now this behavior is equivalent to calling `editor.command(fn)` instead.
---
Fixes: https://github.com/ianstormtaylor/slate/issues/2334
Fixes: https://github.com/ianstormtaylor/slate/issues/2282
* fold Stack into Editor
* switch Change objects to be tied to editors, not values
* introduce controller
* add the "commands" concept
* convert history into commands on `value.data`
* add the ability to not normalize on editor creation/setting
* convert schema to a mutable constructor
* add editor.command method
* convert plugin handlers to receive `next`
* switch commands to use the onCommand middleware
* add queries support, convert schema to queries
* split out browser plugin
* remove noop util
* fixes
* fixes
* start fixing tests, refactor hyperscript to be more literal
* fix slate-html-serializer tests
* fix schema tests with hyperscript
* fix text model tests with hyperscript
* fix more tests
* get all tests passing
* fix lint
* undo decorations example update
* update examples
* small changes to the api to make it nicer
* update docs
* update commands/queries plugin logic
* change normalizeNode and validateNode to be middleware
* fix decoration removal
* rename commands tests
* add useful errors to existing APIs
* update changelogs
* cleanup
* fixes
* update docs
* add editor docs
#### Is this adding or improving a _feature_ or fixing a _bug_?
Debt.
#### What's the new behavior?
This removes almost all existing deprecations from previous API changes, to save on filesize and reduce complexity in the codebase going forward.
It also changes from using the `slate-dev-logger` to using the Facebook-inspired `slate-dev-warning` which can be compiled out of production builds with [`babel-plugin-dev-expression`](https://github.com/4Catalyzer/babel-plugin-dev-expression) to save even further on file size.
The only deprecations it keeps are in the `fromJSON` methods for data model changes like `.kind` and `.leaves` which may still may not have been migrated in databases, since this is a bigger pain point.
#### Have you checked that...?
* [x] The new code matches the existing patterns and styles.
* [x] The tests pass with `yarn test`.
* [x] The linter passes with `yarn lint`. (Fix errors with `yarn prettier`.)
* [x] The relevant examples still work. (Run examples with `yarn watch`.)
#### Does this fix any issues or need any specific reviewers?
Fixes: #1922Fixes: #2105Fixes: #646Fixes: #2109Fixes: #2107Fixes: #2018
#### Is this adding or improving a _feature_ or fixing a _bug_?
Improvement.
#### What's the new behavior?
This introduces two new models: `Decoration` and `Selection`, which both implement the simpler `Range` interface. This way we can introduce properties to these concepts without having to have them live on all ranges, and we can start to introduce more helpful methods specific to each one's needs.
It also means we don't need to move `isFocused` to value, which saves some complexity on the operations side, retaining `set_selection` as the only way selections are modified.
In the process, it also cleans up a lot of the existing model logic for implementing the `Node` interface, and introduces another `Common` interface for shared properties of all Slate models.
#### How does this change work?
It introduces a new `interfaces/` directory where common sets of properties can be declared, and mixed in to the models with the new (simple) `mixin` utility.
#### Have you checked that...?
* [x] The new code matches the existing patterns and styles.
* [x] The tests pass with `yarn test`.
* [x] The linter passes with `yarn lint`. (Fix errors with `yarn prettier`.)
* [x] The relevant examples still work. (Run examples with `yarn watch`.)
#### Does this fix any issues or need any specific reviewers?
Fixes: #1952Fixes: #1807
Fixes: https://github.com/ianstormtaylor/slate/issues/2110
#### Is this adding or improving a _feature_ or fixing a _bug_?
Feature.
#### What's the new behavior?
This pull request adds paths to `Range` objects, including the selection. The paths and keys are kept in sync automatically, so that you can use whichever is ideal for your use case.
This should allow us to use paths for lots of the internal logic, which are much quicker to work with than keys since they avoid having to lookup the key in the document and can just traverse right to the node in question.
#### How does this change work?
`Range` objects have two new properties:
```js
range.anchorPath
range.focusPath
```
(Eventually these will be `range.anchor.path` and `range.focus.path` when points are introduced.)
When operations occur and whenever ranges are created/normalized, the paths are updated and kept in sync with the keys.
#### Have you checked that...?
<!--
Please run through this checklist for your pull request:
-->
* [x] The new code matches the existing patterns and styles.
* [x] The tests pass with `yarn test`.
* [x] The linter passes with `yarn lint`. (Fix errors with `yarn prettier`.)
* [x] The relevant examples still work. (Run examples with `yarn watch`.)
#### Does this fix any issues or need any specific reviewers?
Fixes: https://github.com/ianstormtaylor/slate/issues/1408
Fixes: https://github.com/ianstormtaylor/slate/issues/1567
