Implement EditorTextSelectionGestureDetectorBuilder

lib/widgets/delegate.dart

@@ -1,4 +1,7 @@
 import 'package:flutter/cupertino.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter_quill/models/documents/nodes/leaf.dart';
 
 import 'editor.dart';
@@ -29,7 +32,12 @@ class EditorTextSelectionGestureDetectorBuilder {
   }
 
   onTapDown(TapDownDetails details) {
-//    getRenderEditor().handleTapDown(details);
+    getRenderEditor().handleTapDown(details);
+
+    PointerDeviceKind kind = details.kind;
+    shouldShowSelectionToolbar = kind == null ||
+        kind == PointerDeviceKind.touch ||
+        kind == PointerDeviceKind.stylus;
   }
 
   onForcePressStart(ForcePressDetails details) {
@@ -44,6 +52,80 @@ class EditorTextSelectionGestureDetectorBuilder {
     }
   }
 
+  onForcePressEnd(ForcePressDetails details) {
+    assert(delegate.getForcePressEnabled());
+    getRenderEditor().selectWordsInRange(
+      details.globalPosition,
+      null,
+      SelectionChangedCause.forcePress,
+    );
+    if (shouldShowSelectionToolbar) {
+      getEditor().showToolbar();
+    }
+  }
+
+  onSingleTapUp(TapUpDetails details) {
+    if (delegate.getSelectionEnabled()) {
+      getRenderEditor().selectWordEdge(SelectionChangedCause.tap);
+    }
+  }
+
+  onSingleTapCancel() {}
+
+  onSingleLongTapStart(LongPressStartDetails details) {
+    if (delegate.getSelectionEnabled()) {
+      getRenderEditor().selectPositionAt(
+        details.globalPosition,
+        null,
+        SelectionChangedCause.longPress,
+      );
+    }
+  }
+
+  onSingleLongTapMoveUpdate(LongPressMoveUpdateDetails details) {
+    if (delegate.getSelectionEnabled()) {
+      getRenderEditor().selectPositionAt(
+        details.globalPosition,
+        null,
+        SelectionChangedCause.longPress,
+      );
+    }
+  }
+
+  onSingleLongTapEnd(LongPressEndDetails details) {
+    if (shouldShowSelectionToolbar) {
+      getEditor().showToolbar();
+    }
+  }
+
+  onDoubleTapDown(TapDownDetails details) {
+    if (delegate.getSelectionEnabled()) {
+      getRenderEditor().selectWord(SelectionChangedCause.tap);
+      if (shouldShowSelectionToolbar) {
+        getEditor().showToolbar();
+      }
+    }
+  }
+
+  onDragSelectionStart(DragStartDetails details) {
+    getRenderEditor().selectPositionAt(
+      details.globalPosition,
+      null,
+      SelectionChangedCause.drag,
+    );
+  }
+
+  onDragSelectionUpdate(
+      DragStartDetails startDetails, DragUpdateDetails updateDetails) {
+    getRenderEditor().selectPositionAt(
+      startDetails.globalPosition,
+      updateDetails.globalPosition,
+      SelectionChangedCause.drag,
+    );
+  }
+
+  onDragSelectionEnd(DragEndDetails details) {}
+
   Widget build(HitTestBehavior behavior, Widget child) {
     // TODO
     return null;

lib/widgets/text_selection.dart

@@ -117,3 +117,12 @@ class EditorTextSelectionOverlay {
     _toolbarController.dispose();
   }
 }
+
+class EditorTextSelectionGestureDetector extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() {
+    // TODO: implement createState
+    throw UnimplementedError();
+  }
+
+}