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Add support for multiple cursors #6

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Add support for multiple cursors #6

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44 changes: 20 additions & 24 deletions src/extension.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,6 @@ import * as vscode from "vscode";
function nextPosition(document: vscode.TextDocument, position: vscode.Position, up: boolean = false): number {
const step = up ? -1 : 1;
const boundary = up ? 0 : document.lineCount - 1;
let index = position.line + step;
if (position.line === boundary) return position.line;
return afterBlock(document, step, boundary, position.line);
}
Expand All @@ -18,44 +17,41 @@ function afterBlock(document: vscode.TextDocument, step: number, boundary: numbe
: afterBlock(document, step, boundary, index + step, startedBlock || !line.isEmptyOrWhitespace);
}

function anchorPosition(selection: vscode.Selection) {
return selection.active.line === selection.end.line ? selection.start : selection.end
function updateSelection(selection: vscode.Selection, next: number, anchor?: vscode.Position) {
const active = selection.active.with(next, 0);
return new vscode.Selection(anchor || active, active);
}

function markSelection(editor: vscode.TextEditor, next: number, anchor?: vscode.Position) {
const active = editor.selection.active.with(next, 0);
editor.selection = new vscode.Selection(anchor || active, active);
editor.revealRange(new vscode.Range(active, active));
function jump(up: boolean = false, select: boolean = false) {
const editor = vscode.window.activeTextEditor;
const newSelections = []
for (let index = 0; index < editor.selections.length; index++) {
const selection = editor.selections[index];
const anchor = select ? selection.anchor : undefined
const updated = updateSelection(editor, nextPosition(editor.document, selection.active, up), anchor);
newSelections.push(updated);
}
editor.selections = newSelections;
const s0 = editor.selection;
editor.revealRange(new vscode.Range(s0.active, s0.active));
}

export function activate(context: vscode.ExtensionContext) {
context.subscriptions.push(vscode.commands.registerCommand("spaceBlockJumper.moveUp", () => {
const editor = vscode.window.activeTextEditor;
markSelection(editor, nextPosition(editor.document, editor.selection.active, true));
jump(true, false);
}));

context.subscriptions.push(vscode.commands.registerCommand("spaceBlockJumper.moveDown", () => {
const editor = vscode.window.activeTextEditor;
markSelection(editor, nextPosition(editor.document, editor.selection.active, false));
jump(false, false);
}));

context.subscriptions.push(vscode.commands.registerCommand("spaceBlockJumper.selectUp", () => {
const editor = vscode.window.activeTextEditor;
markSelection(
editor,
nextPosition(editor.document, editor.selection.active, true),
anchorPosition(editor.selection)
);
jump(true, true);
}));

context.subscriptions.push(vscode.commands.registerCommand("spaceBlockJumper.selectDown", () => {
const editor = vscode.window.activeTextEditor;
markSelection(
editor,
nextPosition(editor.document, editor.selection.active, false),
anchorPosition(editor.selection)
);
jump(false, true);
}));
}

export function deactivate() { }
export function deactivate() { }