create better structure inspired by ObsidianTweaks'

src/DirectionalMove.ts

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+import { App, Editor, EditorChange, EditorTransaction, MarkdownView } from 'obsidian'
+import BindThemPlugin from './main'
+import { Direction } from './Entities'
+import { selectionToRange } from './Utils'
+
+/**
+ * DirectionalMove provides commands to move selection content left or right
+ */
+export class DirectionalMove {
+	public app: App
+	private plugin: BindThemPlugin
+
+	constructor(app: App, plugin: BindThemPlugin) {
+		this.app = app
+		this.plugin = plugin
+	}
+
+	/**
+	 * Move the current selection(s) in the specified direction (left or right)
+	 */
+	public directionalMove(
+		editor: Editor,
+		view: MarkdownView,
+		direction: Direction.Left | Direction.Right
+	): void {
+		const selections = editor.listSelections()
+
+		const changes: Array<EditorChange> = []
+		for (const selection of selections) {
+			const range = selectionToRange(selection)
+
+			let additionChange: EditorChange
+			let deletionChange: EditorChange
+			switch (direction) {
+				case Direction.Left: {
+					deletionChange = {
+						from: {
+							line: range.from.line,
+							ch: range.from.ch - 1,
+						},
+						to: range.from,
+						text: '',
+					}
+
+					additionChange = {
+						from: range.to,
+						to: range.to,
+						text: editor.getRange(deletionChange.from, deletionChange.to!),
+					}
+					break
+				}
+
+				case Direction.Right: {
+					deletionChange = {
+						from: range.to,
+						to: {
+							line: range.to.line,
+							ch: range.to.ch + 1,
+						},
+						text: '',
+					}
+
+					additionChange = {
+						from: range.from,
+						to: range.from,
+						text: editor.getRange(deletionChange.from, deletionChange.to!),
+					}
+					break
+				}
+			}
+
+			changes.push(deletionChange, additionChange)
+		}
+
+		const transaction: EditorTransaction = {
+			changes: changes,
+		}
+
+		const origin = 'DirectionalMove_' + String(direction)
+		editor.transaction(transaction, origin)
+	}
+}