4 files changed, 166 insertions, 0 deletions
diff --git a/src/background/operators/impls/FindNextOperator.ts b/src/background/operators/impls/FindNextOperator.ts
new file mode 100644
index 0000000..241f71d
--- /dev/null
+++ b/src/background/operators/impls/FindNextOperator.ts
@@ -0,0 +1,94 @@
+import Operator from "../Operator";
+import TabPresenter from "../../presenters/TabPresenter";
+import FindRepository from "../../repositories/FindRepository";
+import FindClient from "../../clients/FindClient";
+import ConsoleClient from "../../infrastructures/ConsoleClient";
+import FramePresenter from "../../presenters/FramePresenter";
+
+export default class FindNextOperator implements Operator {
+  constructor(
+    private readonly tabPresenter: TabPresenter,
+    private readonly findRepository: FindRepository,
+    private readonly findClient: FindClient,
+    private readonly consoleClient: ConsoleClient,
+    private readonly framePresenter: FramePresenter
+  ) {}
+
+  async run(): Promise<void> {
+    const tab = await this.tabPresenter.getCurrent();
+    const tabId = tab?.id;
+    if (tabId == null) {
+      return;
+    }
+
+    const state = await this.findRepository.getLocalState(tabId);
+    if (state) {
+      // Start to find the keyword from the current frame which last found on,
+      // and concat it to end of frame ids to perform a wrap-search
+      //
+      //                ,- keyword should be in this frame
+      //                |
+      // [100, 101, 0, 100]
+      //   |
+      //   `- continue from frame id 100
+      //
+      const targetFrameIds = state.frameIds
+        .slice(state.framePos)
+        .concat(
+          state.frameIds.slice(0, state.framePos),
+          state.frameIds[state.framePos]
+        );
+
+      for (let i = 0; i < targetFrameIds.length; ++i) {
+        const found = await this.findClient.findNext(
+          tabId,
+          targetFrameIds[i],
+          state.keyword
+        );
+        if (found) {
+          this.findRepository.setLocalState(tabId, {
+            ...state,
+            framePos: (i + state.framePos) % state.frameIds.length, // save current frame position or first
+          });
+          return;
+        }
+        this.findClient.clearSelection(tabId, targetFrameIds[i]);
+      }
+
+      // The keyword is gone.
+      this.consoleClient.showError(
+        tabId,
+        "Pattern not found: " + state.keyword
+      );
+      return;
+    }
+
+    const keyword = await this.findRepository.getGlobalKeyword();
+    if (keyword) {
+      const frameIds = await this.framePresenter.getAllFrameIds(tabId);
+      for (const frameId of frameIds) {
+        await this.findClient.clearSelection(tabId, frameId);
+      }
+
+      for (let framePos = 0; framePos < frameIds.length; ++framePos) {
+        const found = await this.findClient.findNext(
+          tabId,
+          frameIds[framePos],
+          keyword
+        );
+        if (found) {
+          await this.findRepository.setLocalState(tabId, {
+            frameIds,
+            framePos,
+            keyword,
+          });
+          await this.consoleClient.showInfo(tabId, "Pattern found: " + keyword);
+          return;
+        }
+      }
+      this.consoleClient.showError(tabId, "Pattern not found: " + keyword);
+      return;
+    }
+    await this.consoleClient.showError(tabId, "No previous search keywords");
+  }
+}
diff --git a/src/background/operators/impls/FindOperatorFactoryChain.ts b/src/background/operators/impls/FindOperatorFactoryChain.ts
new file mode 100644
index 0000000..b71f032
--- /dev/null
+++ b/src/background/operators/impls/FindOperatorFactoryChain.ts
@@ -0,0 +1,49 @@
+import { inject, injectable } from "tsyringe";
+import Operator from "../Operator";
+import OperatorFactoryChain from "../OperatorFactoryChain";
+import TabPresenter from "../../presenters/TabPresenter";
+import * as operations from "../../../shared/operations";
+import FindNextOperator from "./FindNextOperator";
+import FindPrevOperator from "./FindPrevOperator";
+import FindRepository from "../../repositories/FindRepository";
+import FindClient from "../../clients/FindClient";
+import FramePresenter from "../../presenters/FramePresenter";
+import ConsoleClient from "../../infrastructures/ConsoleClient";
+
+@injectable()
+export default class FindOperatorFactoryChain implements OperatorFactoryChain {
+  constructor(
+    @inject("TabPresenter")
+    private readonly tabPresenter: TabPresenter,
+    @inject("FindRepository")
+    private readonly findRepository: FindRepository,
+    @inject("FindClient")
+    private readonly findClient: FindClient,
+    @inject("ConsoleClient")
+    private readonly consoleClient: ConsoleClient,
+    @inject("FramePresenter")
+    private readonly framePresenter: FramePresenter
+  ) {}
+
+  create(op: operations.Operation): Operator | null {
+    switch (op.type) {
+      case operations.FIND_NEXT:
+        return new FindNextOperator(
+          this.tabPresenter,
+          this.findRepository,
+          this.findClient,
+          this.consoleClient,
+          this.framePresenter
+        );
+      case operations.FIND_PREV:
+        return new FindPrevOperator(
+          this.tabPresenter,
+          this.findRepository,
+          this.findClient,
+          this.consoleClient,
+          this.framePresenter
+        );
+    }
+    return null;
+  }
+}
diff --git a/src/background/operators/impls/FindPrevOperator.ts b/src/background/operators/impls/FindPrevOperator.ts
new file mode 100644
index 0000000..28238f6
--- /dev/null
+++ b/src/background/operators/impls/FindPrevOperator.ts
@@ -0,0 +1,20 @@
+import Operator from "../Operator";
+import TabPresenter from "../../presenters/TabPresenter";
+import FindRepository from "../../repositories/FindRepository";
+import FindClient from "../../clients/FindClient";
+import ConsoleClient from "../../infrastructures/ConsoleClient";
+import FramePresenter from "../../presenters/FramePresenter";
+
+export default class FindPrevOperator implements Operator {
+  constructor(
+    _tabPresenter: TabPresenter,
+    _findRepository: FindRepository,
+    _findClient: FindClient,
+    _consoleClient: ConsoleClient,
+    _framePresenter: FramePresenter
+  ) {}
+
+  async run(): Promise<void> {
+    throw new Error("not implemented");
+  }
+}
diff --git a/src/background/operators/impls/OperatorFactoryImpl.ts b/src/background/operators/impls/OperatorFactoryImpl.ts
index 34e7bb5..ce87491 100644
--- a/src/background/operators/impls/OperatorFactoryImpl.ts
+++ b/src/background/operators/impls/OperatorFactoryImpl.ts
@@ -8,6 +8,7 @@ import NavigateOperatorFactoryChain from "./NavigateOperatorFactoryChain";
 import RepeatOperatorFactoryChain from "./RepeatOperatorFactoryChain";
 import TabOperatorFactoryChain from "./TabOperatorFactoryChain";
 import ZoomOperatorFactoryChain from "./ZoomOperatorFactoryChain";
+import FindOperatorFactoryChain from "./FindOperatorFactoryChain";
 import * as operations from "../../../shared/operations";
 
 @injectable()
@@ -20,6 +21,7 @@ export class OperatorFactoryImpl implements OperatorFactory {
     navigateOperatorFactoryChain: NavigateOperatorFactoryChain,
     tabOperatorFactoryChain: TabOperatorFactoryChain,
     zoomOperatorFactoryChain: ZoomOperatorFactoryChain,
+    findOperatorFactoryChain: FindOperatorFactoryChain,
     @inject(delay(() => RepeatOperatorFactoryChain))
     repeatOperatorFactoryChain: RepeatOperatorFactoryChain
   ) {
@@ -30,6 +32,7 @@ export class OperatorFactoryImpl implements OperatorFactory {
       repeatOperatorFactoryChain,
       tabOperatorFactoryChain,
       zoomOperatorFactoryChain,
+      findOperatorFactoryChain,
     ];
   }