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feat: back delete to previous line

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This commit is contained in:
Vincent Chan 2022-09-13 14:28:18 +08:00
parent 06bd6064ac
commit 9b3701dd88
1 changed files with 61 additions and 21 deletions
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82
frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/backspace_handler.dart
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@ -26,7 +26,7 @@ KeyEventResult _handleBackspace(EditorState editorState, RawKeyEvent event) {
nodes = selection.isBackward ? nodes : nodes.reversed.toList(growable: false);
selection = selection.isBackward ? selection : selection.reversed;
final textNodes = nodes.whereType<TextNode>().toList();
final nonTextNodes =
final List<Node> nonTextNodes =
nodes.where((node) => node is! TextNode).toList(growable: false);
final transactionBuilder = TransactionBuilder(editorState);
@ -59,23 +59,13 @@ KeyEventResult _handleBackspace(EditorState editorState, RawKeyEvent event) {
} else {
// 2. non-style
// find previous text node.
var previous = textNode.previous;
while (previous != null) {
if (previous is TextNode) {
transactionBuilder
..mergeText(previous, textNode)
..deleteNode(textNode)
..afterSelection = Selection.collapsed(
Position(
path: previous.path,
offset: previous.toRawString().length,
),
);
break;
} else {
previous = previous.previous;
}
}
return _backDeleteToPreviousTextNode(
editorState,
textNode,
transactionBuilder,
nonTextNodes,
selection,
);
}
} else {
if (selection.isCollapsed) {
@ -103,7 +93,10 @@ KeyEventResult _handleBackspace(EditorState editorState, RawKeyEvent event) {
if (nodeAtStart is TextNode && nodeAtStart.subtype == StyleKey.numberList) {
makeFollowingNodesIncremental(
editorState, startPosition.path, transactionBuilder.afterSelection!);
editorState,
startPosition.path,
transactionBuilder.afterSelection!,
);
}
return KeyEventResult.handled;
}
@ -117,8 +110,55 @@ KeyEventResult _handleBackspace(EditorState editorState, RawKeyEvent event) {
if (cancelNumberListPath != null) {
makeFollowingNodesIncremental(
editorState, cancelNumberListPath, Selection.collapsed(selection.start),
beginNum: 0);
editorState,
cancelNumberListPath,
Selection.collapsed(selection.start),
beginNum: 0,
);
}
return KeyEventResult.handled;
}
KeyEventResult _backDeleteToPreviousTextNode(
EditorState editorState,
TextNode textNode,
TransactionBuilder transactionBuilder,
List<Node> nonTextNodes,
Selection selection) {
var previous = textNode.previous;
bool prevIsNumberList = false;
while (previous != null) {
if (previous is TextNode) {
if (previous.subtype == StyleKey.numberList) {
prevIsNumberList = true;
}
transactionBuilder
..mergeText(previous, textNode)
..deleteNode(textNode)
..afterSelection = Selection.collapsed(
Position(
path: previous.path,
offset: previous.toRawString().length,
),
);
break;
} else {
previous = previous.previous;
}
}
if (transactionBuilder.operations.isNotEmpty) {
if (nonTextNodes.isNotEmpty) {
transactionBuilder.afterSelection = Selection.collapsed(selection.start);
}
transactionBuilder.commit();
}
if (prevIsNumberList) {
makeFollowingNodesIncremental(
editorState, previous!.path, transactionBuilder.afterSelection!);
}
return KeyEventResult.handled;