Multi Cursor for paredit Expand selection and shrink selection

Fixes #610

Author: riotrah

.vscode/settings.json

@@ -58,6 +58,7 @@
         "docmirror",
         "Docstring",
         "Dorg",
+        "doseq",
         "dotimes",
         "Dvlaaad",
         "eckstein",
@@ -205,5 +206,20 @@
             ],
             "allowCompoundWords": false
         }
-    ]
-}
+    ],
+    "peacock.color": "#e48141",
+    "typescript.tsdk": "node_modules/typescript/lib",
+    "[typescript]": {
+        "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "[jsonc]": {
+        "editor.defaultFormatter": "vscode.json-language-features"
+    },
+    "workbench.colorCustomizations": {
+        "sash.hoverBorder": "#ea9f6e",
+        "titleBar.activeBackground": "#e48141",
+        "titleBar.activeForeground": "#15202b",
+        "titleBar.inactiveBackground": "#e4814199",
+        "titleBar.inactiveForeground": "#15202b99"
+    },
+}

src/cursor-doc/model.ts

@@ -1,7 +1,7 @@
-import { Scanner, Token, ScannerState } from './clojure-lexer';
-import { LispTokenCursor } from './token-cursor';
+import { isUndefined, max, min } from 'lodash';
 import { deepEqual as equal } from '../util/object';
-import { isUndefined } from 'lodash';
+import { Scanner, ScannerState, Token } from './clojure-lexer';
+import { LispTokenCursor } from './token-cursor';
 
 let scanner: Scanner;
 
@@ -84,6 +84,7 @@ export type ModelEditOptions = {
   undoStopBefore?: boolean;
   formatDepth?: number;
   skipFormat?: boolean;
+  selections?: ModelEditSelection[];
   selection?: ModelEditSelection;
 };
 
@@ -107,11 +108,14 @@ export interface EditableDocument {
   readonly selectionLeft: number;
   readonly selectionRight: number;
   selection: ModelEditSelection;
+  selections: ModelEditSelection[];
   model: EditableModel;
+  selectionsStack: ModelEditSelection[][];
   selectionStack: ModelEditSelection[];
   getTokenCursor: (offset?: number, previous?: boolean) => LispTokenCursor;
   insertString: (text: string) => void;
-  getSelectionText: () => string;
+  getSelectionText: (index?: number) => string;
+  getSelectionsText: () => string[];
   delete: () => Thenable<boolean>;
   backspace: () => Thenable<boolean>;
 }
@@ -548,6 +552,8 @@ export class StringDocument implements EditableDocument {
 
   model: LineInputModel = new LineInputModel(1, this);
 
+  selectionsStack: ModelEditSelection[][] = [];
+  selections: ModelEditSelection[] = [];
   selectionStack: ModelEditSelection[] = [];
 
   getTokenCursor(offset?: number, previous?: boolean): LispTokenCursor {
@@ -558,23 +564,35 @@ export class StringDocument implements EditableDocument {
     return this.model.getTokenCursor(offset);
   }
 
+  getSelectionsText: () => string[];
   insertString(text: string) {
     this.model.insertString(0, text);
   }
 
-  getSelectionText: () => string;
-
   delete() {
-    const p = this.selectionLeft;
-    return this.model.edit([new ModelEdit('deleteRange', [p, 1])], {
-      selection: new ModelEditSelection(p),
+    const edits = [];
+    const selections = [];
+    this.selections.forEach(({ anchor: p }) => {
+      edits.push(new ModelEdit('deleteRange', [p, 1]));
+      selections.push(new ModelEditSelection(p));
+    });
+
+    return this.model.edit(edits, {
+      selections,
     });
   }
+  getSelectionText: () => string;
 
   backspace() {
-    const p = this.selectionLeft;
-    return this.model.edit([new ModelEdit('deleteRange', [p - 1, 1])], {
-      selection: new ModelEditSelection(p - 1),
+    const edits = [];
+    const selections = [];
+    this.selections.forEach(({ anchor: p }) => {
+      edits.push(new ModelEdit('deleteRange', [p - 1, 1]));
+      selections.push(new ModelEditSelection(p - 1));
+    });
+
+    return this.model.edit(edits, {
+      selections,
     });
   }
 }