707 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Dart
		
	
	
	
	
	
			
		
		
	
	
			707 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Dart
		
	
	
	
	
	
| import 'dart:async';
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| import 'dart:convert';
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| import 'dart:io';
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| import 'dart:math';
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| import 'dart:ui' as ui;
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| 
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| import 'package:flutter/gestures.dart';
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| import 'package:flutter/services.dart';
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| import 'package:flutter/widgets.dart';
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| import 'package:get/get.dart';
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| 
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| import '../../models/model.dart';
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| import '../../models/platform_model.dart';
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| import '../common.dart';
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| import '../consts.dart';
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| import './state_model.dart';
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| 
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| /// Mouse button enum.
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| enum MouseButtons { left, right, wheel }
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| 
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| const _kMouseEventDown = 'mousedown';
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| const _kMouseEventUp = 'mouseup';
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| const _kMouseEventMove = 'mousemove';
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| 
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| extension ToString on MouseButtons {
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|   String get value {
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|     switch (this) {
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|       case MouseButtons.left:
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|         return 'left';
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|       case MouseButtons.right:
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|         return 'right';
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|       case MouseButtons.wheel:
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|         return 'wheel';
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|     }
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|   }
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| }
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| 
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| class InputModel {
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|   final WeakReference<FFI> parent;
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|   String keyboardMode = "legacy";
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| 
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|   // keyboard
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|   var shift = false;
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|   var ctrl = false;
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|   var alt = false;
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|   var command = false;
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| 
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|   // trackpad
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|   var _trackpadLastDelta = Offset.zero;
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|   var _stopFling = true;
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|   var _fling = false;
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|   Timer? _flingTimer;
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|   final _flingBaseDelay = 30;
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|   // trackpad, peer linux
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|   final _trackpadSpeed = 0.06;
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|   var _trackpadScrollUnsent = Offset.zero;
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| 
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|   var _lastScale = 1.0;
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| 
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|   // mouse
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|   final isPhysicalMouse = false.obs;
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|   int _lastButtons = 0;
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|   Offset lastMousePos = Offset.zero;
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| 
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|   get id => parent.target?.id ?? "";
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| 
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|   late final SessionID sessionId;
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| 
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|   bool get keyboardPerm => parent.target!.ffiModel.keyboard;
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| 
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|   InputModel(this.parent) {
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|     sessionId = parent.target!.sessionId;
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|   }
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| 
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|   KeyEventResult handleRawKeyEvent(FocusNode data, RawKeyEvent e) {
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|     if (isDesktop && !stateGlobal.grabKeyboard) {
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|       return KeyEventResult.handled;
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|     }
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| 
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|     // * Currently mobile does not enable map mode
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|     if (isDesktop) {
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|       bind.sessionGetKeyboardMode(sessionId: sessionId).then((result) {
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|         keyboardMode = result.toString();
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|       });
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|     }
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| 
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|     final key = e.logicalKey;
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|     if (e is RawKeyDownEvent) {
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|       if (!e.repeat) {
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|         if (e.isAltPressed && !alt) {
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|           alt = true;
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|         } else if (e.isControlPressed && !ctrl) {
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|           ctrl = true;
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|         } else if (e.isShiftPressed && !shift) {
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|           shift = true;
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|         } else if (e.isMetaPressed && !command) {
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|           command = true;
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|         }
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|       }
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|     }
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|     if (e is RawKeyUpEvent) {
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|       if (key == LogicalKeyboardKey.altLeft ||
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|           key == LogicalKeyboardKey.altRight) {
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|         alt = false;
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|       } else if (key == LogicalKeyboardKey.controlLeft ||
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|           key == LogicalKeyboardKey.controlRight) {
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|         ctrl = false;
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|       } else if (key == LogicalKeyboardKey.shiftRight ||
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|           key == LogicalKeyboardKey.shiftLeft) {
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|         shift = false;
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|       } else if (key == LogicalKeyboardKey.metaLeft ||
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|           key == LogicalKeyboardKey.metaRight ||
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|           key == LogicalKeyboardKey.superKey) {
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|         command = false;
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|       }
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|     }
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| 
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|     // * Currently mobile does not enable map mode
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|     if (isDesktop && keyboardMode == 'map') {
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|       mapKeyboardMode(e);
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|     } else {
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|       legacyKeyboardMode(e);
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|     }
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| 
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|     return KeyEventResult.handled;
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|   }
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| 
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|   void mapKeyboardMode(RawKeyEvent e) {
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|     int positionCode = -1;
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|     int platformCode = -1;
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|     bool down;
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| 
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|     if (e.data is RawKeyEventDataMacOs) {
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|       RawKeyEventDataMacOs newData = e.data as RawKeyEventDataMacOs;
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|       positionCode = newData.keyCode;
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|       platformCode = newData.keyCode;
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|     } else if (e.data is RawKeyEventDataWindows) {
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|       RawKeyEventDataWindows newData = e.data as RawKeyEventDataWindows;
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|       positionCode = newData.scanCode;
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|       platformCode = newData.keyCode;
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|     } else if (e.data is RawKeyEventDataLinux) {
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|       RawKeyEventDataLinux newData = e.data as RawKeyEventDataLinux;
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|       // scanCode and keyCode of RawKeyEventDataLinux are incorrect.
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|       // 1. scanCode means keycode
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|       // 2. keyCode means keysym
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|       positionCode = newData.scanCode;
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|       platformCode = newData.keyCode;
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|     } else if (e.data is RawKeyEventDataAndroid) {
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|       RawKeyEventDataAndroid newData = e.data as RawKeyEventDataAndroid;
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|       positionCode = newData.scanCode + 8;
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|       platformCode = newData.keyCode;
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|     } else {}
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| 
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|     if (e is RawKeyDownEvent) {
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|       down = true;
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|     } else {
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|       down = false;
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|     }
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|     inputRawKey(e.character ?? '', platformCode, positionCode, down);
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|   }
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| 
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|   /// Send raw Key Event
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|   void inputRawKey(String name, int platformCode, int positionCode, bool down) {
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|     const capslock = 1;
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|     const numlock = 2;
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|     const scrolllock = 3;
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|     int lockModes = 0;
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|     if (HardwareKeyboard.instance.lockModesEnabled
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|         .contains(KeyboardLockMode.capsLock)) {
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|       lockModes |= (1 << capslock);
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|     }
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|     if (HardwareKeyboard.instance.lockModesEnabled
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|         .contains(KeyboardLockMode.numLock)) {
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|       lockModes |= (1 << numlock);
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|     }
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|     if (HardwareKeyboard.instance.lockModesEnabled
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|         .contains(KeyboardLockMode.scrollLock)) {
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|       lockModes |= (1 << scrolllock);
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|     }
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|     bind.sessionHandleFlutterKeyEvent(
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|         sessionId: sessionId,
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|         name: name,
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|         platformCode: platformCode,
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|         positionCode: positionCode,
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|         lockModes: lockModes,
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|         downOrUp: down);
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|   }
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| 
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|   void legacyKeyboardMode(RawKeyEvent e) {
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|     if (e is RawKeyDownEvent) {
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|       if (e.repeat) {
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|         sendRawKey(e, press: true);
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|       } else {
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|         sendRawKey(e, down: true);
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|       }
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|     }
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|     if (e is RawKeyUpEvent) {
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|       sendRawKey(e);
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|     }
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|   }
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| 
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|   void sendRawKey(RawKeyEvent e, {bool? down, bool? press}) {
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|     // for maximum compatibility
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|     final label = physicalKeyMap[e.physicalKey.usbHidUsage] ??
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|         logicalKeyMap[e.logicalKey.keyId] ??
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|         e.logicalKey.keyLabel;
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|     inputKey(label, down: down, press: press ?? false);
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|   }
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| 
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|   /// Send key stroke event.
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|   /// [down] indicates the key's state(down or up).
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|   /// [press] indicates a click event(down and up).
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|   void inputKey(String name, {bool? down, bool? press}) {
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|     if (!keyboardPerm) return;
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|     bind.sessionInputKey(
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|         sessionId: sessionId,
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|         name: name,
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|         down: down ?? false,
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|         press: press ?? true,
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|         alt: alt,
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|         ctrl: ctrl,
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|         shift: shift,
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|         command: command);
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|   }
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| 
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|   Map<String, dynamic> getEvent(PointerEvent evt, String type) {
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|     final Map<String, dynamic> out = {};
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|     out['x'] = evt.position.dx;
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|     out['y'] = evt.position.dy;
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|     if (alt) out['alt'] = 'true';
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|     if (shift) out['shift'] = 'true';
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|     if (ctrl) out['ctrl'] = 'true';
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|     if (command) out['command'] = 'true';
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| 
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|     // Check update event type and set buttons to be sent.
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|     int buttons = _lastButtons;
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|     if (type == _kMouseEventMove) {
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|       // flutter may emit move event if one button is pressed and another button
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|       // is pressing or releasing.
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|       if (evt.buttons != _lastButtons) {
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|         // For simplicity
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|         // Just consider 3 - 1 ((Left + Right buttons) - Left button)
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|         // Do not consider 2 - 1 (Right button - Left button)
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|         // or 6 - 5 ((Right + Mid buttons) - (Left + Mid buttons))
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|         // and so on
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|         buttons = evt.buttons - _lastButtons;
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|         if (buttons > 0) {
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|           type = _kMouseEventDown;
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|         } else {
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|           type = _kMouseEventUp;
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|           buttons = -buttons;
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|         }
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|       }
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|     } else {
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|       if (evt.buttons != 0) {
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|         buttons = evt.buttons;
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|       }
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|     }
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|     _lastButtons = evt.buttons;
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| 
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|     out['buttons'] = buttons;
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|     out['type'] = type;
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| 
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|     return out;
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|   }
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| 
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|   /// Send a mouse tap event(down and up).
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|   void tap(MouseButtons button) {
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|     sendMouse('down', button);
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|     sendMouse('up', button);
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|   }
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| 
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|   void tapDown(MouseButtons button) {
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|     sendMouse('down', button);
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|   }
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| 
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|   void tapUp(MouseButtons button) {
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|     sendMouse('up', button);
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|   }
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| 
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|   /// Send scroll event with scroll distance [y].
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|   void scroll(int y) {
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|     bind.sessionSendMouse(
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|         sessionId: sessionId,
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|         msg: json
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|             .encode(modify({'id': id, 'type': 'wheel', 'y': y.toString()})));
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|   }
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| 
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|   /// Reset key modifiers to false, including [shift], [ctrl], [alt] and [command].
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|   void resetModifiers() {
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|     shift = ctrl = alt = command = false;
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|   }
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| 
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|   /// Modify the given modifier map [evt] based on current modifier key status.
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|   Map<String, String> modify(Map<String, String> evt) {
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|     if (ctrl) evt['ctrl'] = 'true';
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|     if (shift) evt['shift'] = 'true';
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|     if (alt) evt['alt'] = 'true';
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|     if (command) evt['command'] = 'true';
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|     return evt;
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|   }
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| 
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|   /// Send mouse press event.
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|   void sendMouse(String type, MouseButtons button) {
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|     if (!keyboardPerm) return;
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|     bind.sessionSendMouse(
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|         sessionId: sessionId,
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|         msg: json.encode(modify({'type': type, 'buttons': button.value})));
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|   }
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| 
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|   void enterOrLeave(bool enter) {
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|     // Fix status
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|     if (!enter) {
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|       resetModifiers();
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|     }
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|     _flingTimer?.cancel();
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|     bind.sessionEnterOrLeave(sessionId: sessionId, enter: enter);
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|   }
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| 
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|   /// Send mouse movement event with distance in [x] and [y].
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|   void moveMouse(double x, double y) {
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|     if (!keyboardPerm) return;
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|     var x2 = x.toInt();
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|     var y2 = y.toInt();
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|     bind.sessionSendMouse(
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|         sessionId: sessionId,
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|         msg: json.encode(modify({'x': '$x2', 'y': '$y2'})));
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|   }
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| 
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|   void onPointHoverImage(PointerHoverEvent e) {
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|     _stopFling = true;
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|     if (e.kind != ui.PointerDeviceKind.mouse) return;
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|     if (!isPhysicalMouse.value) {
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|       isPhysicalMouse.value = true;
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|     }
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|     if (isPhysicalMouse.value) {
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|       handleMouse(getEvent(e, _kMouseEventMove));
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|     }
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|   }
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| 
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|   void onPointerPanZoomStart(PointerPanZoomStartEvent e) {
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|     _lastScale = 1.0;
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|     _stopFling = true;
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|   }
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| 
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|   // https://docs.flutter.dev/release/breaking-changes/trackpad-gestures
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|   void onPointerPanZoomUpdate(PointerPanZoomUpdateEvent e) {
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|     final scale = ((e.scale - _lastScale) * 1000).toInt();
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|     _lastScale = e.scale;
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| 
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|     if (scale != 0) {
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|       bind.sessionSendPointer(
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|           sessionId: sessionId,
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|           msg: json.encode({
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|             'touch': {'scale': scale}
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|           }));
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|       return;
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|     }
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| 
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|     final delta = e.panDelta;
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|     _trackpadLastDelta = delta;
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| 
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|     var x = delta.dx.toInt();
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|     var y = delta.dy.toInt();
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|     if (parent.target?.ffiModel.pi.platform == kPeerPlatformLinux) {
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|       _trackpadScrollUnsent += (delta * _trackpadSpeed);
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|       x = _trackpadScrollUnsent.dx.truncate();
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|       y = _trackpadScrollUnsent.dy.truncate();
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|       _trackpadScrollUnsent -= Offset(x.toDouble(), y.toDouble());
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|     } else {
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|       if (x == 0 && y == 0) {
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|         final thr = 0.1;
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|         if (delta.dx.abs() > delta.dy.abs()) {
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|           x = delta.dx > thr ? 1 : (delta.dx < -thr ? -1 : 0);
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|         } else {
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|           y = delta.dy > thr ? 1 : (delta.dy < -thr ? -1 : 0);
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|         }
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|       }
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|     }
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|     if (x != 0 || y != 0) {
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|       bind.sessionSendMouse(
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|           sessionId: sessionId,
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|           msg: '{"type": "trackpad", "x": "$x", "y": "$y"}');
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|     }
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|   }
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| 
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|   void _scheduleFling(double x, double y, int delay) {
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|     if ((x == 0 && y == 0) || _stopFling) {
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|       _fling = false;
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|       return;
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|     }
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| 
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|     _flingTimer = Timer(Duration(milliseconds: delay), () {
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|       if (_stopFling) {
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|         _fling = false;
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|         return;
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|       }
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| 
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|       final d = 0.97;
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|       x *= d;
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|       y *= d;
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| 
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|       // Try set delta (x,y) and delay.
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|       var dx = x.toInt();
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|       var dy = y.toInt();
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|       if (parent.target?.ffiModel.pi.platform == kPeerPlatformLinux) {
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|         dx = (x * _trackpadSpeed).toInt();
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|         dy = (y * _trackpadSpeed).toInt();
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|       }
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| 
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|       var delay = _flingBaseDelay;
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| 
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|       if (dx == 0 && dy == 0) {
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|         _fling = false;
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|         return;
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|       }
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| 
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|       bind.sessionSendMouse(
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|           sessionId: sessionId,
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|           msg: '{"type": "trackpad", "x": "$dx", "y": "$dy"}');
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|       _scheduleFling(x, y, delay);
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|     });
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|   }
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| 
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|   void waitLastFlingDone() {
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|     if (_fling) {
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|       _stopFling = true;
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|     }
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|     for (var i = 0; i < 5; i++) {
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|       if (!_fling) {
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|         break;
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|       }
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|       sleep(Duration(milliseconds: 10));
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|     }
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|     _flingTimer?.cancel();
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|   }
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| 
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|   void onPointerPanZoomEnd(PointerPanZoomEndEvent e) {
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|     bind.sessionSendPointer(
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|         sessionId: sessionId,
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|         msg: json.encode({
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|           'touch': {'scale': 0}
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|         }));
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| 
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|     waitLastFlingDone();
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|     _stopFling = false;
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| 
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|     // 2.0 is an experience value
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|     double minFlingValue = 2.0;
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|     if (_trackpadLastDelta.dx.abs() > minFlingValue ||
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|         _trackpadLastDelta.dy.abs() > minFlingValue) {
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|       _fling = true;
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|       _scheduleFling(
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|           _trackpadLastDelta.dx, _trackpadLastDelta.dy, _flingBaseDelay);
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|     }
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|     _trackpadLastDelta = Offset.zero;
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|   }
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| 
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|   void onPointDownImage(PointerDownEvent e) {
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|     debugPrint("onPointDownImage ${e.kind}");
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|     _stopFling = true;
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|     if (e.kind != ui.PointerDeviceKind.mouse) {
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|       if (isPhysicalMouse.value) {
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|         isPhysicalMouse.value = false;
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|       }
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|     }
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|     if (isPhysicalMouse.value) {
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|       handleMouse(getEvent(e, _kMouseEventDown));
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|     }
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|   }
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| 
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|   void onPointUpImage(PointerUpEvent e) {
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|     if (e.kind != ui.PointerDeviceKind.mouse) return;
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|     if (isPhysicalMouse.value) {
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|       handleMouse(getEvent(e, _kMouseEventUp));
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|     }
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|   }
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| 
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|   void onPointMoveImage(PointerMoveEvent e) {
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|     if (e.kind != ui.PointerDeviceKind.mouse) return;
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|     if (isPhysicalMouse.value) {
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|       handleMouse(getEvent(e, _kMouseEventMove));
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|     }
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|   }
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| 
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|   void onPointerSignalImage(PointerSignalEvent e) {
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|     if (e is PointerScrollEvent) {
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|       var dx = e.scrollDelta.dx.toInt();
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|       var dy = e.scrollDelta.dy.toInt();
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|       if (dx > 0) {
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|         dx = -1;
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|       } else if (dx < 0) {
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|         dx = 1;
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|       }
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|       if (dy > 0) {
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|         dy = -1;
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|       } else if (dy < 0) {
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|         dy = 1;
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|       }
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|       bind.sessionSendMouse(
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|           sessionId: sessionId,
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|           msg: '{"type": "wheel", "x": "$dx", "y": "$dy"}');
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|     }
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|   }
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| 
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|   void refreshMousePos() => handleMouse({
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|         'x': lastMousePos.dx,
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|         'y': lastMousePos.dy,
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|         'buttons': 0,
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|         'type': _kMouseEventMove,
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|       });
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| 
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|   void tryMoveEdgeOnExit(Offset pos) => handleMouse(
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|         {
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|           'x': pos.dx,
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|           'y': pos.dy,
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|           'buttons': 0,
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|           'type': _kMouseEventMove,
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|         },
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|         onExit: true,
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|       );
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| 
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|   int trySetNearestRange(int v, int min, int max, int n) {
 | |
|     if (v < min && v >= min - n) {
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|       v = min;
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|     }
 | |
|     if (v > max && v <= max + n) {
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|       v = max;
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|     }
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|     return v;
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|   }
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| 
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|   Offset setNearestEdge(double x, double y, Display d) {
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|     double left = x - d.x;
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|     double right = d.x + d.width - 1 - x;
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|     double top = y - d.y;
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|     double bottom = d.y + d.height - 1 - y;
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|     if (left < right && left < top && left < bottom) {
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|       x = d.x;
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|     }
 | |
|     if (right < left && right < top && right < bottom) {
 | |
|       x = d.x + d.width - 1;
 | |
|     }
 | |
|     if (top < left && top < right && top < bottom) {
 | |
|       y = d.y;
 | |
|     }
 | |
|     if (bottom < left && bottom < right && bottom < top) {
 | |
|       y = d.y + d.height - 1;
 | |
|     }
 | |
|     return Offset(x, y);
 | |
|   }
 | |
| 
 | |
|   void handleMouse(
 | |
|     Map<String, dynamic> evt, {
 | |
|     bool onExit = false,
 | |
|   }) {
 | |
|     double x = evt['x'];
 | |
|     double y = max(0.0, evt['y']);
 | |
|     final cursorModel = parent.target!.cursorModel;
 | |
| 
 | |
|     if (cursorModel.isPeerControlProtected) {
 | |
|       lastMousePos = ui.Offset(x, y);
 | |
|       return;
 | |
|     }
 | |
| 
 | |
|     if (!cursorModel.gotMouseControl) {
 | |
|       bool selfGetControl =
 | |
|           (x - lastMousePos.dx).abs() > kMouseControlDistance ||
 | |
|               (y - lastMousePos.dy).abs() > kMouseControlDistance;
 | |
|       if (selfGetControl) {
 | |
|         cursorModel.gotMouseControl = true;
 | |
|       } else {
 | |
|         lastMousePos = ui.Offset(x, y);
 | |
|         return;
 | |
|       }
 | |
|     }
 | |
|     lastMousePos = ui.Offset(x, y);
 | |
| 
 | |
|     var type = '';
 | |
|     var isMove = false;
 | |
|     switch (evt['type']) {
 | |
|       case _kMouseEventDown:
 | |
|         type = 'down';
 | |
|         break;
 | |
|       case _kMouseEventUp:
 | |
|         type = 'up';
 | |
|         break;
 | |
|       case _kMouseEventMove:
 | |
|         isMove = true;
 | |
|         break;
 | |
|       default:
 | |
|         return;
 | |
|     }
 | |
|     evt['type'] = type;
 | |
|     y -= CanvasModel.topToEdge;
 | |
|     x -= CanvasModel.leftToEdge;
 | |
|     final canvasModel = parent.target!.canvasModel;
 | |
|     final nearThr = 3;
 | |
|     var nearRight = (canvasModel.size.width - x) < nearThr;
 | |
|     var nearBottom = (canvasModel.size.height - y) < nearThr;
 | |
| 
 | |
|     final ffiModel = parent.target!.ffiModel;
 | |
|     if (isMove) {
 | |
|       canvasModel.moveDesktopMouse(x, y);
 | |
|     }
 | |
|     final d = ffiModel.display;
 | |
|     final imageWidth = d.width * canvasModel.scale;
 | |
|     final imageHeight = d.height * canvasModel.scale;
 | |
|     if (canvasModel.scrollStyle == ScrollStyle.scrollbar) {
 | |
|       x += imageWidth * canvasModel.scrollX;
 | |
|       y += imageHeight * canvasModel.scrollY;
 | |
| 
 | |
|       // boxed size is a center widget
 | |
|       if (canvasModel.size.width > imageWidth) {
 | |
|         x -= ((canvasModel.size.width - imageWidth) / 2);
 | |
|       }
 | |
|       if (canvasModel.size.height > imageHeight) {
 | |
|         y -= ((canvasModel.size.height - imageHeight) / 2);
 | |
|       }
 | |
|     } else {
 | |
|       x -= canvasModel.x;
 | |
|       y -= canvasModel.y;
 | |
|     }
 | |
| 
 | |
|     x /= canvasModel.scale;
 | |
|     y /= canvasModel.scale;
 | |
|     if (canvasModel.scale > 0 && canvasModel.scale < 1) {
 | |
|       final step = 1.0 / canvasModel.scale - 1;
 | |
|       if (nearRight) {
 | |
|         x += step;
 | |
|       }
 | |
|       if (nearBottom) {
 | |
|         y += step;
 | |
|       }
 | |
|     }
 | |
|     x += d.x;
 | |
|     y += d.y;
 | |
| 
 | |
|     if (onExit) {
 | |
|       final pos = setNearestEdge(x, y, d);
 | |
|       x = pos.dx;
 | |
|       y = pos.dy;
 | |
|     }
 | |
| 
 | |
|     var evtX = 0;
 | |
|     var evtY = 0;
 | |
|     try {
 | |
|       evtX = x.round();
 | |
|       evtY = y.round();
 | |
|     } catch (e) {
 | |
|       debugPrintStack(
 | |
|           label: 'canvasModel.scale value ${canvasModel.scale}, $e');
 | |
|       return;
 | |
|     }
 | |
| 
 | |
|     int minX = d.x.toInt();
 | |
|     int maxX = (d.x + d.width).toInt() - 1;
 | |
|     int minY = d.y.toInt();
 | |
|     int maxY = (d.y + d.height).toInt() - 1;
 | |
|     evtX = trySetNearestRange(evtX, minX, maxX, 5);
 | |
|     evtY = trySetNearestRange(evtY, minY, maxY, 5);
 | |
|     if (evtX < minX || evtY < minY || evtX > maxX || evtY > maxY) {
 | |
|       // If left mouse up, no early return.
 | |
|       if (evt['buttons'] != kPrimaryMouseButton || type != 'up') {
 | |
|         return;
 | |
|       }
 | |
|     }
 | |
| 
 | |
|     if (type != '') {
 | |
|       evtX = 0;
 | |
|       evtY = 0;
 | |
|     }
 | |
| 
 | |
|     evt['x'] = '$evtX';
 | |
|     evt['y'] = '$evtY';
 | |
|     var buttons = '';
 | |
|     switch (evt['buttons']) {
 | |
|       case kPrimaryMouseButton:
 | |
|         buttons = 'left';
 | |
|         break;
 | |
|       case kSecondaryMouseButton:
 | |
|         buttons = 'right';
 | |
|         break;
 | |
|       case kMiddleMouseButton:
 | |
|         buttons = 'wheel';
 | |
|         break;
 | |
|       case kBackMouseButton:
 | |
|         buttons = 'back';
 | |
|         break;
 | |
|       case kForwardMouseButton:
 | |
|         buttons = 'forward';
 | |
|         break;
 | |
|     }
 | |
|     evt['buttons'] = buttons;
 | |
|     bind.sessionSendMouse(sessionId: sessionId, msg: json.encode(evt));
 | |
|   }
 | |
| 
 | |
|   /// Web only
 | |
|   void listenToMouse(bool yesOrNo) {
 | |
|     if (yesOrNo) {
 | |
|       platformFFI.startDesktopWebListener();
 | |
|     } else {
 | |
|       platformFFI.stopDesktopWebListener();
 | |
|     }
 | |
|   }
 | |
| }
 |