1 files changed, 58 insertions, 0 deletions
diff --git a/src/content/usecases/ScrollUseCase.ts b/src/content/usecases/ScrollUseCase.ts
new file mode 100644
index 0000000..6a1f801
--- /dev/null
+++ b/src/content/usecases/ScrollUseCase.ts
@@ -0,0 +1,58 @@
+import ScrollPresenter, { ScrollPresenterImpl }
+  from '../presenters/ScrollPresenter';
+import SettingRepository, { SettingRepositoryImpl }
+  from '../repositories/SettingRepository';
+
+export default class ScrollUseCase {
+  private presenter: ScrollPresenter;
+
+  private settingRepository: SettingRepository;
+
+  constructor({
+    presenter = new ScrollPresenterImpl(),
+    settingRepository = new SettingRepositoryImpl(),
+  } = {}) {
+    this.presenter = presenter;
+    this.settingRepository = settingRepository;
+  }
+
+  scrollVertically(count: number): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollVertically(count, smooth);
+  }
+
+  scrollHorizonally(count: number): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollHorizonally(count, smooth);
+  }
+
+  scrollPages(count: number): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollPages(count, smooth);
+  }
+
+  scrollToTop(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToTop(smooth);
+  }
+
+  scrollToBottom(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToBottom(smooth);
+  }
+
+  scrollToHome(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToHome(smooth);
+  }
+
+  scrollToEnd(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToEnd(smooth);
+  }
+
+  private getSmoothScroll(): boolean {
+    let settings = this.settingRepository.get();
+    return settings.properties.smoothscroll;
+  }
+}