selection delegate methods, imports cleanup (#515)

lib/src/utils/color.dart

@@ -1,5 +1,3 @@
-import 'dart:ui';
-
 import 'package:flutter/material.dart';
 
 Color stringToColor(String? s) {

lib/src/widgets/controller.dart

@@ -200,6 +200,8 @@ class QuillController extends ChangeNotifier {
   /// Called in two cases:
   /// forward == false && textBefore.isEmpty
   /// forward == true && textAfter.isEmpty
+  /// Android only
+  /// see https://github.com/singerdmx/flutter-quill/discussions/514
   void handleDelete(int cursorPosition, bool forward) =>
       onDelete?.call(cursorPosition, forward);
 

lib/src/widgets/default_styles.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:tuple/tuple.dart';
 
 import 'style_widgets/style_widgets.dart';

lib/src/widgets/delegate.dart

@@ -1,11 +1,8 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
 import '../../flutter_quill.dart';
 
-import '../models/documents/nodes/leaf.dart';
-import 'editor.dart';
 import 'text_selection.dart';
 
 typedef EmbedBuilder = Widget Function(

lib/src/widgets/editor.dart

@@ -7,7 +7,6 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/services.dart';
 import 'package:string_validator/string_validator.dart';
 import 'package:url_launcher/url_launcher.dart';
 
@@ -51,7 +50,7 @@ abstract class EditorState extends State<RawEditor> {
 
   TextEditingValue getTextEditingValue();
 
-  void setTextEditingValue(TextEditingValue value);
+  void setTextEditingValue(TextEditingValue value, SelectionChangedCause cause);
 
   RenderEditor? getRenderEditor();
 
@@ -62,6 +61,8 @@ abstract class EditorState extends State<RawEditor> {
   void hideToolbar();
 
   void requestKeyboard();
+
+  bool get readOnly;
 }
 
 /// Base interface for editable render objects.

lib/src/widgets/image.dart

@@ -1,6 +1,4 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
 import 'package:photo_view/photo_view.dart';
 
 class ImageTapWrapper extends StatelessWidget {

lib/src/widgets/raw_editor.dart

@@ -641,7 +641,8 @@ class RawEditorState extends EditorState
   }
 
   @override
-  void setTextEditingValue(TextEditingValue value) {
+  void setTextEditingValue(
+      TextEditingValue value, SelectionChangedCause cause) {
     if (value.text == textEditingValue.text) {
       widget.controller.updateSelection(value.selection, ChangeSource.LOCAL);
     } else {
@@ -723,6 +724,8 @@ class RawEditorState extends EditorState
 
   @override
   bool get wantKeepAlive => widget.focusNode.hasFocus;
+
+  bool get readOnly => widget.readOnly;
 }
 
 class _Editor extends MultiChildRenderObjectWidget {

lib/src/widgets/raw_editor/raw_editor_state_keyboard_mixin.dart

@@ -104,7 +104,7 @@ mixin RawEditorStateKeyboardMixin on EditorState {
           text:
               selection.textBefore(plainText) + selection.textAfter(plainText),
           selection: TextSelection.collapsed(offset: selection.start),
-        ));
+        ), SelectionChangedCause.keyboard);
       }
       return;
     }
@@ -156,12 +156,7 @@ mixin RawEditorStateKeyboardMixin on EditorState {
     if (size == 0) {
       widget.controller.handleDelete(cursorPosition, forward);
     } else {
-      widget.controller.replaceText(
-        cursorPosition,
-        size,
-        '',
-        newSelection,
-      );
+      widget.controller.replaceText(cursorPosition, size, '', newSelection);
     }
   }
 

lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart

@@ -1,6 +1,8 @@
-import 'dart:math';
+import 'dart:math' as math;
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 
 import '../editor.dart';
@@ -14,7 +16,8 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
 
   @override
   set textEditingValue(TextEditingValue value) {
-    setTextEditingValue(value);
+    // deprecated
+    setTextEditingValue(value, SelectionChangedCause.keyboard);
   }
 
   @override
@@ -50,8 +53,8 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
     final expandedRect = Rect.fromCenter(
       center: rect.center,
       width: rect.width,
-      height:
-          max(rect.height, getRenderEditor()!.preferredLineHeight(position)),
+      height: math.max(
+          rect.height, getRenderEditor()!.preferredLineHeight(position)),
     );
 
     additionalOffset = expandedRect.height >= editableSize.height
@@ -81,10 +84,8 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
 
   @override
   void userUpdateTextEditingValue(
-    TextEditingValue value,
-    SelectionChangedCause cause,
-  ) {
-    setTextEditingValue(value);
+      TextEditingValue value, SelectionChangedCause cause) {
+    setTextEditingValue(value, cause);
   }
 
   @override
@@ -98,4 +99,118 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
 
   @override
   bool get selectAllEnabled => widget.toolbarOptions.selectAll;
+
+  void setSelection(TextSelection nextSelection, SelectionChangedCause cause) {
+    if (nextSelection == textEditingValue.selection) {
+      return;
+    }
+    setTextEditingValue(
+      textEditingValue.copyWith(selection: nextSelection),
+      cause,
+    );
+  }
+
+  @override
+  void copySelection(SelectionChangedCause cause) {
+    final selection = textEditingValue.selection;
+    if (selection.isCollapsed || !selection.isValid) {
+      return;
+    }
+    Clipboard.setData(
+        ClipboardData(text: selection.textInside(textEditingValue.text)));
+
+    if (cause == SelectionChangedCause.toolbar) {
+      bringIntoView(textEditingValue.selection.extent);
+      hideToolbar(false);
+
+      switch (defaultTargetPlatform) {
+        case TargetPlatform.iOS:
+          break;
+        case TargetPlatform.macOS:
+        case TargetPlatform.android:
+        case TargetPlatform.fuchsia:
+        case TargetPlatform.linux:
+        case TargetPlatform.windows:
+        // Collapse the selection and hide the toolbar and handles.
+          userUpdateTextEditingValue(
+            TextEditingValue(
+              text: textEditingValue.text,
+              selection: TextSelection.collapsed(offset: textEditingValue.selection.end),
+            ),
+            SelectionChangedCause.toolbar,
+          );
+          break;
+      }
+    }
+  }
+
+  @override
+  void cutSelection(SelectionChangedCause cause) {
+    final selection = textEditingValue.selection;
+    if (readOnly || !selection.isValid || selection.isCollapsed) {
+      return;
+    }
+    final text = textEditingValue.text;
+    Clipboard.setData(ClipboardData(text: selection.textInside(text)));
+    setTextEditingValue(
+      TextEditingValue(
+        text: selection.textBefore(text) + selection.textAfter(text),
+        selection: TextSelection.collapsed(
+          offset: math.min(selection.start, selection.end),
+          affinity: selection.affinity,
+        ),
+      ),
+      cause,
+    );
+
+    if (cause == SelectionChangedCause.toolbar) {
+      bringIntoView(textEditingValue.selection.extent);
+      hideToolbar();
+    }
+  }
+
+  @override
+  Future<void> pasteText(SelectionChangedCause cause) async {
+    final selection = textEditingValue.selection;
+    if (readOnly || !selection.isValid) {
+      return;
+    }
+    final text = textEditingValue.text;
+    // See https://github.com/flutter/flutter/issues/11427
+    final data = await Clipboard.getData(Clipboard.kTextPlain);
+    if (data == null) {
+      return;
+    }
+    setTextEditingValue(
+      TextEditingValue(
+        text:
+            selection.textBefore(text) + data.text! + selection.textAfter(text),
+        selection: TextSelection.collapsed(
+          offset: math.min(selection.start, selection.end) + data.text!.length,
+          affinity: selection.affinity,
+        ),
+      ),
+      cause,
+    );
+
+    if (cause == SelectionChangedCause.toolbar) {
+      bringIntoView(textEditingValue.selection.extent);
+      hideToolbar();
+    }
+  }
+
+  @override
+  void selectAll(SelectionChangedCause cause) {
+    setSelection(
+      textEditingValue.selection.copyWith(
+        baseOffset: 0,
+        extentOffset: textEditingValue.text.length,
+      ),
+      cause,
+    );
+
+    if (cause == SelectionChangedCause.toolbar) {
+      bringIntoView(textEditingValue.selection.extent);
+    }
+  }
 }

lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/widgets.dart';
 
 import '../../models/documents/document.dart';
 import '../../utils/diff_delta.dart';

lib/src/widgets/simple_viewer.dart

@@ -4,7 +4,6 @@ import 'dart:io' as io;
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:flutter/services.dart';
 import 'package:string_validator/string_validator.dart';
 import 'package:tuple/tuple.dart';
 

lib/src/widgets/text_block.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:tuple/tuple.dart';

lib/src/widgets/text_selection.dart

@@ -1,11 +1,9 @@
 import 'dart:async';
 import 'dart:math' as math;
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
 import 'package:flutter/scheduler.dart';
 
 import '../models/documents/nodes/node.dart';

lib/src/widgets/toolbar/camera_button.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:image_picker/image_picker.dart';
 
@@ -6,7 +5,6 @@ import '../../models/themes/quill_icon_theme.dart';
 import '../controller.dart';
 import '../toolbar.dart';
 import 'image_video_utils.dart';
-import 'quill_icon_button.dart';
 
 class CameraButton extends StatelessWidget {
   const CameraButton({

lib/src/widgets/toolbar/clear_format_button.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 
 import '../../../flutter_quill.dart';
-import 'quill_icon_button.dart';
 
 class ClearFormatButton extends StatefulWidget {
   const ClearFormatButton({

lib/src/widgets/toolbar/color_button.dart

@@ -8,7 +8,6 @@ import '../../translations/toolbar.i18n.dart';
 import '../../utils/color.dart';
 import '../controller.dart';
 import '../toolbar.dart';
-import 'quill_icon_button.dart';
 
 /// Controls color styles.
 ///

lib/src/widgets/toolbar/history_button.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 
 import '../../../flutter_quill.dart';
-import 'quill_icon_button.dart';
 
 class HistoryButton extends StatefulWidget {
   const HistoryButton({

lib/src/widgets/toolbar/image_button.dart

@@ -4,12 +4,10 @@ import 'package:image_picker/image_picker.dart';
 import '../../models/documents/nodes/embed.dart';
 import '../../models/themes/quill_dialog_theme.dart';
 import '../../models/themes/quill_icon_theme.dart';
-import '../../utils/media_pick_setting.dart';
 import '../controller.dart';
 import '../link_dialog.dart';
 import '../toolbar.dart';
 import 'image_video_utils.dart';
-import 'quill_icon_button.dart';
 
 class ImageButton extends StatelessWidget {
   const ImageButton({

lib/src/widgets/toolbar/image_video_utils.dart

@@ -6,7 +6,6 @@ import 'package:image_picker/image_picker.dart';
 
 import '../../models/documents/nodes/embed.dart';
 import '../../translations/toolbar.i18n.dart';
-import '../../utils/media_pick_setting.dart';
 import '../controller.dart';
 import '../toolbar.dart';
 

lib/src/widgets/toolbar/indent_button.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 
 import '../../../flutter_quill.dart';
-import 'quill_icon_button.dart';
 
 class IndentButton extends StatefulWidget {
   const IndentButton({

lib/src/widgets/toolbar/insert_embed_button.dart

@@ -4,7 +4,6 @@ import '../../models/documents/nodes/embed.dart';
 import '../../models/themes/quill_icon_theme.dart';
 import '../controller.dart';
 import '../toolbar.dart';
-import 'quill_icon_button.dart';
 
 class InsertEmbedButton extends StatelessWidget {
   const InsertEmbedButton({

lib/src/widgets/toolbar/link_style_button.dart

@@ -7,7 +7,6 @@ import '../../translations/toolbar.i18n.dart';
 import '../controller.dart';
 import '../link_dialog.dart';
 import '../toolbar.dart';
-import 'quill_icon_button.dart';
 
 class LinkStyleButton extends StatefulWidget {
   const LinkStyleButton({

lib/src/widgets/toolbar/select_alignment_button.dart

@@ -84,7 +84,7 @@ class _SelectAlignmentButtonState extends State<SelectAlignmentButton> {
       mainAxisSize: MainAxisSize.min,
       children: List.generate(buttonCount, (index) {
         return Padding(
-          padding: const EdgeInsets.symmetric(horizontal: !kIsWeb ? 1.0 : 5.0),
+          padding: EdgeInsets.symmetric(horizontal: !kIsWeb ? 1.0 : 5.0),
           child: ConstrainedBox(
             constraints: BoxConstraints.tightFor(
               width: widget.iconSize * kIconButtonFactor,

lib/src/widgets/toolbar/select_header_style_button.dart

@@ -67,7 +67,7 @@ class _SelectHeaderStyleButtonState extends State<SelectHeaderStyleButton> {
       mainAxisSize: MainAxisSize.min,
       children: List.generate(4, (index) {
         return Padding(
-          padding: const EdgeInsets.symmetric(horizontal: !kIsWeb ? 1.0 : 5.0),
+          padding: EdgeInsets.symmetric(horizontal: !kIsWeb ? 1.0 : 5.0),
           child: ConstrainedBox(
             constraints: BoxConstraints.tightFor(
               width: widget.iconSize * kIconButtonFactor,

lib/src/widgets/toolbar/toggle_check_list_button.dart

@@ -5,7 +5,6 @@ import '../../models/documents/style.dart';
 import '../../models/themes/quill_icon_theme.dart';
 import '../controller.dart';
 import '../toolbar.dart';
-import 'toggle_style_button.dart';
 
 class ToggleCheckListButton extends StatefulWidget {
   const ToggleCheckListButton({

lib/src/widgets/toolbar/toggle_style_button.dart

@@ -5,7 +5,6 @@ import '../../models/documents/style.dart';
 import '../../models/themes/quill_icon_theme.dart';
 import '../controller.dart';
 import '../toolbar.dart';
-import 'quill_icon_button.dart';
 
 typedef ToggleStyleButtonBuilder = Widget Function(
   BuildContext context,

lib/src/widgets/toolbar/video_button.dart

@@ -4,12 +4,10 @@ import 'package:image_picker/image_picker.dart';
 import '../../models/documents/nodes/embed.dart';
 import '../../models/themes/quill_dialog_theme.dart';
 import '../../models/themes/quill_icon_theme.dart';
-import '../../utils/media_pick_setting.dart';
 import '../controller.dart';
 import '../link_dialog.dart';
 import '../toolbar.dart';
 import 'image_video_utils.dart';
-import 'quill_icon_button.dart';
 
 class VideoButton extends StatelessWidget {
   const VideoButton({