feat: move terminal settings, look and ssh tools into ssh-terminal plugin

plugins/ssh-terminal/tests/frontend/look/terminal-font-zoom.test.ts

@@ -0,0 +1,74 @@
+import { describe, expect, it } from "vitest";
+import {
+  getNextTerminalFontSize,
+  getTerminalFontZoomDirection,
+} from "../../../src/frontend/look/terminal-font-zoom";
+
+function keyEvent(
+  overrides: Partial<KeyboardEvent>,
+): Pick<KeyboardEvent, "altKey" | "code" | "ctrlKey" | "key" | "metaKey"> {
+  return {
+    altKey: false,
+    code: "",
+    ctrlKey: false,
+    key: "",
+    metaKey: false,
+    ...overrides,
+  };
+}
+
+describe("getTerminalFontZoomDirection", () => {
+  it("recognizes Ctrl+Plus and Ctrl+Minus", () => {
+    expect(
+      getTerminalFontZoomDirection(
+        keyEvent({ ctrlKey: true, code: "Equal", key: "+" }),
+      ),
+    ).toBe(1);
+    expect(
+      getTerminalFontZoomDirection(
+        keyEvent({ ctrlKey: true, code: "Minus", key: "-" }),
+      ),
+    ).toBe(-1);
+  });
+
+  it("recognizes unshifted equal, numpad, and macOS shortcuts", () => {
+    expect(
+      getTerminalFontZoomDirection(
+        keyEvent({ ctrlKey: true, code: "Equal", key: "=" }),
+      ),
+    ).toBe(1);
+    expect(
+      getTerminalFontZoomDirection(
+        keyEvent({ ctrlKey: true, code: "NumpadAdd", key: "+" }),
+      ),
+    ).toBe(1);
+    expect(
+      getTerminalFontZoomDirection(
+        keyEvent({ metaKey: true, code: "NumpadSubtract", key: "-" }),
+      ),
+    ).toBe(-1);
+  });
+
+  it("ignores unmodified and Alt-modified keys", () => {
+    expect(
+      getTerminalFontZoomDirection(keyEvent({ code: "Equal", key: "+" })),
+    ).toBe(0);
+    expect(
+      getTerminalFontZoomDirection(
+        keyEvent({ altKey: true, ctrlKey: true, code: "Minus", key: "-" }),
+      ),
+    ).toBe(0);
+  });
+});
+
+describe("getNextTerminalFontSize", () => {
+  it("changes the font size one pixel at a time", () => {
+    expect(getNextTerminalFontSize(14, 1)).toBe(15);
+    expect(getNextTerminalFontSize(14, -1)).toBe(13);
+  });
+
+  it("keeps the existing zoom limits", () => {
+    expect(getNextTerminalFontSize(36, 1)).toBe(36);
+    expect(getNextTerminalFontSize(8, -1)).toBe(8);
+  });
+});