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64 lines
2.6 KiB
Dart
64 lines
2.6 KiB
Dart
import 'dart:async';
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import 'dart:math' as math;
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import 'package:flutter_custom_cursor/cursor_manager.dart'
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as custom_cursor_manager;
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import 'package:flutter_custom_cursor/flutter_custom_cursor.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/widgets.dart' show WidgetsBinding;
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import 'package:flutter_hbb/common.dart';
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import 'package:flutter_hbb/consts.dart';
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import 'package:flutter_hbb/models/model.dart';
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deleteCustomCursor(String key) =>
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custom_cursor_manager.CursorManager.instance.deleteCursor(key);
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resetSystemCursor() {}
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MouseCursor buildCursorOfCache(
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CursorModel cursor, double scale, CursorData? cache) {
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if (cache == null) {
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return MouseCursor.defer;
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} else {
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// Include the live DPR so moving between monitors rebuilds the native
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// bitmap even when the remote view scale has not changed.
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final dpr = WidgetsBinding
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.instance.platformDispatcher.views.single.devicePixelRatio;
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// Keep Original and older peers unchanged. A long-edge minimum preserves
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// the proportions of thin remote cursors when normalizing their DPI.
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final legacyMinimum = cache.pixelRatio == 0 ||
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cursor.parent.target?.canvasModel.viewStyle.style == kRemoteViewStyleOriginal;
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// The minimum is logical, while Windows callers pass a physical scale.
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final effectiveScale = !legacyMinimum && isWindows
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? math.max(scale, kMinCursorSize * dpr / math.max(cache.width, cache.height))
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: scale;
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final key = '${cache.updateGetKey(effectiveScale, resizeImage: false, useLegacyMinimum: legacyMinimum)}_$dpr';
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if (!cursor.cachedKeys.contains(key)) {
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debugPrint(
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"Register custom cursor with key $key (${cache.hotx},${cache.hoty})");
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unawaited(custom_cursor_manager.CursorManager.instance
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.registerCursorImage(
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name: key,
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image: cache.nativeImage,
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hotSpot: Offset(cache.hotxOrigin, cache.hotyOrigin),
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// Windows callers already express scale in physical pixels.
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// The plugin takes logical scale and applies DPR during rasterization.
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scale: isWindows ? cache.scale / dpr : cache.scale,
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devicePixelRatio: dpr,
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)
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.then<void>((_) {}, onError: (Object error, StackTrace stack) {
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cursor.cachedKeys.remove(key);
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FlutterError.reportError(FlutterErrorDetails(
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exception: error,
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stack: stack,
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library: 'native cursor',
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context: ErrorDescription('registering cursor $key')));
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}));
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cursor.addKey(key);
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}
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return FlutterCustomMemoryImageCursor(key: key);
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}
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}
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