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InputBuilder.cs

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InputBuilder.cs

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using System;
using System.Collections.Generic;
using static Vanara.PInvoke.User32;
namespace NetAutoGUI.Windows
{
/// <summary>
/// Adapted from https://github.com/GregsStack/InputSimulatorStandard
/// </summary>
internal class InputBuilder
{
private readonly List<INPUT> inputList = new List<INPUT>();
private static readonly List<VirtualKeyCode> ExtendedKeys = new List<VirtualKeyCode>
{
VirtualKeyCode.NUMPAD_RETURN,
VirtualKeyCode.MENU,
VirtualKeyCode.RMENU,
VirtualKeyCode.CONTROL,
VirtualKeyCode.RCONTROL,
VirtualKeyCode.INSERT,
VirtualKeyCode.DELETE,
VirtualKeyCode.HOME,
VirtualKeyCode.END,
VirtualKeyCode.PRIOR,
VirtualKeyCode.NEXT,
VirtualKeyCode.RIGHT,
VirtualKeyCode.UP,
VirtualKeyCode.LEFT,
VirtualKeyCode.DOWN,
VirtualKeyCode.NUMLOCK,
VirtualKeyCode.CANCEL,
VirtualKeyCode.SNAPSHOT,
VirtualKeyCode.DIVIDE
};
/// <summary>
/// Returns the list of <see cref="Input"/> messages as a <see cref="Array"/> of <see cref="Input"/> messages.
/// </summary>
/// <returns>The <see cref="System.Array"/> of <see cref="Input"/> messages.</returns>
public INPUT[] ToArray() => this.inputList.ToArray();
/// <summary>
/// Determines if the <see cref="VirtualKeyCode"/> is an ExtendedKey
/// </summary>
/// <param name="keyCode">The key code.</param>
/// <returns>true if the key code is an extended key; otherwise, false.</returns>
/// <remarks>
/// The extended keys consist of the ALT and CTRL keys on the right-hand side of the keyboard; the INS, DEL, HOME, END, PAGE UP, PAGE DOWN, and arrow keys in the clusters to the left of the numeric keypad; the NUM LOCK key; the BREAK (CTRL+PAUSE) key; the PRINT SCRN key; and the divide (/) and ENTER keys in the numeric keypad.
///
/// See http://msdn.microsoft.com/en-us/library/ms646267(v=vs.85).aspx Section "Extended-Key Flag"
/// </remarks>
public static bool IsExtendedKey(VirtualKeyCode keyCode) => ExtendedKeys.Contains(keyCode);
/// <summary>
/// Adds a key down to the list of <see cref="Input"/> messages.
/// </summary>
/// <param name="keyCod 10000 e">The <see cref="VirtualKeyCode"/>.</param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddKeyDown(VirtualKeyCode keyCode)
{
var code = (ushort)((int)keyCode & 0xFFFF);
var down =
new INPUT
{
type = INPUTTYPE.INPUT_KEYBOARD,
ki = new KEYBDINPUT
{
wVk = code,
wScan = (ushort)(MapVirtualKey(code, 0) & 0xFFU),
dwFlags = IsExtendedKey(keyCode) ? KEYEVENTF.KEYEVENTF_EXTENDEDKEY : 0,
time = 0,
dwExtraInfo = IntPtr.Zero
}
};
this.inputList.Add(down);
return this;
}
/// <summary>
/// Adds a key up to the list of <see cref="Input"/> messages.
/// </summary>
/// <param name="keyCode">The <see cref="VirtualKeyCode"/>.</param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddKeyUp(VirtualKeyCode keyCode)
{
var code = (ushort)((int)keyCode & 0xFFFF);
var up =
new INPUT
{
type = INPUTTYPE.INPUT_KEYBOARD,
ki = new KEYBDINPUT
{
wVk = code,
wScan = (ushort)(MapVirtualKey(code, 0) & 0xFFU),
dwFlags = IsExtendedKey(keyCode) ? KEYEVENTF.KEYEVENTF_KEYUP | KEYEVENTF.KEYEVENTF_EXTENDEDKEY
: KEYEVENTF.KEYEVENTF_KEYUP,
time = 0,
dwExtraInfo = IntPtr.Zero
}
};
this.inputList.Add(up);
return this;
}
/// <summary>
/// Adds a key press to the list of <see cref="Input"/> messages which is equivalent to a key down followed by a key up.
/// </summary>
/// <param name="keyCode">The <see cref="VirtualKeyCode"/>.</param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddKeyPress(VirtualKeyCode keyCode)
{
this.AddKeyDown(keyCode);
this.AddKeyUp(keyCode);
return this;
}
/// <summary>
/// Adds the character to the list of <see cref="Input"/> messages.
/// </summary>
/// <param name="character">The <see cref="System.Char"/> to be added to the list of <see cref="Input"/> messages.</param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddCharacter(char character)
{
ushort scanCode = character;
KEYEVENTF flagDown = KEYEVENTF.KEYEVENTF_UNICODE;
KEYEVENTF flagUp = KEYEVENTF.KEYEVENTF_KEYUP | KEYEVENTF.KEYEVENTF_UNICODE;
// Handle extended keys:
// If the scan code is preceded by a prefix byte that has the value 0xE0 (224),
// we need to include the KEYEVENTF_EXTENDEDKEY flag in the Flags property.
if ((scanCode & 0xFF00) == 0xE000)
{
flagDown |= KEYEVENTF.KEYEVENTF_EXTENDEDKEY;
flagUp |= KEYEVENTF.KEYEVENTF_EXTENDEDKEY;
}
var down = new INPUT
{
type = INPUTTYPE.INPUT_KEYBOARD,
ki = new KEYBDINPUT
{
wVk = 0,
wScan = scanCode,
dwFlags = flagDown,
time = 0,
dwExtraInfo = IntPtr.Zero
}
};
var up = new INPUT
{
type = INPUTTYPE.INPUT_KEYBOARD,
ki = new KEYBDINPUT
{
wVk = 0,
wScan = scanCode,
dwFlags = flagUp,
time = 0,
dwExtraInfo = IntPtr.Zero
}
};
this.inputList.Add(down);
this.inputList.Add(up);
return this;
}
/// <summary>
/// Adds all of the characters in the specified <see cref="IEnumerable{T}"/> of <see cref="char"/>.
/// </summary>
/// <param name="characters">The characters to add.</param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddCharacters(IEnumerable<char> characters)
{
foreach (var character in characters)
{
this.AddCharacter(character);
}
return this;
}
/// <summary>
/// Adds the characters in the specified <see cref="string"/>.
/// </summary>
/// <param name="characters">The string of <see cref="char"/> to add.</param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddCharacters(string characters) => this.AddCharacters(characters.ToCharArray());
/// <summary>
/// Moves the mouse relative to its current position.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddRelativeMouseMovement(int x, int y)
{
MOUSEINPUT mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_MOVE,
dx = x,
dy = y
};
var movement = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = mi };
this.inputList.Add(movement);
return this;
}
/// <summary>
/// Move the mouse to an absolute position.
/// </summary>
/// <param name="absoluteX"></param>
/// <param name="absoluteY"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddAbsoluteMouseMovement(int absoluteX, int absoluteY)
{
MOUSEINPUT mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_MOVE | MOUSEEVENTF.MOUSEEVENTF_ABSOLUTE,
dx = (absoluteX * 65536) / GetSystemMetrics(SystemMetric.SM_CXSCREEN),
dy = (absoluteY * 65536) / GetSystemMetrics(SystemMetric.SM_CYSCREEN),
};
var movement = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = mi };
this.inputList.Add(movement);
return this;
}
/// <summary>
/// Move the mouse to the absolute position on the virtual desktop.
/// </summary>
/// <param name="absoluteX"></param>
/// <param name="absoluteY"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddAbsoluteMouseMovementOnVirtualDesktop(int absoluteX, int absoluteY)
{
MOUSEINPUT mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_MOVE | MOUSEEVENTF.MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF.MOUSEEVENTF_VIRTUALDESK,
dx = (absoluteX * 65536) / GetSystemMetrics(SystemMetric.SM_CXSCREEN),
dy = (absoluteY * 65536) / GetSystemMetrics(SystemMetric.SM_CYSCREEN),
};
var movement = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = mi };
this.inputList.Add(movement);
return this;
}
/// <summary>
/// Adds a mouse button down for the specified button.
/// </summary>
/// <param name="button"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseButtonDown(MouseButtonType button)
{
var flags = ToMouseButtonDownFlag(button);
var buttonDown = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = new MOUSEINPUT { dwFlags = flags } };
this.inputList.Add(buttonDown);
return this;
}
/// <summary>
/// Adds a mouse button down for the specified button.
/// </summary>
/// <param name="xButtonId"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseXButtonDown(int xButtonId)
{
var buttonDown = new INPUT
{
type = INPUTTYPE.INPUT_MOUSE,
mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_XDOWN,
mouseData = xButtonId
}
};
this.inputList.Add(buttonDown);
return this;
}
/// <summary>
/// Adds a mouse button up for the specified button.
/// </summary>
/// <param name="button"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseButtonUp(MouseButtonType button)
{
var flags = ToMouseButtonUpFlag(button);
var buttonUp = new INPUT
{
type = INPUTTYPE.INPUT_MOUSE,
mi = new MOUSEINPUT
{
dwFlags = flags
}
};
this.inputList.Add(buttonUp);
return this;
}
/// <summary>
/// Adds a mouse button up for the specified button.
/// </summary>
/// <param name="xButtonId"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseXButtonUp(int xButtonId)
{
MOUSEINPUT mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_XUP,
mouseData = xButtonId,
};
var buttonUp = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = mi };
this.inputList.Add(buttonUp);
return this;
}
/// <summary>
/// Adds a single click of the specified button.
/// </summary>
/// <param name="button"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseButtonClick(MouseButtonType button) => this.AddMouseButtonDown(button).AddMouseButtonUp(button);
/// <summary>
/// Adds a single click of the specified button.
/// </summary>
/// <param name="xButtonId"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseXButtonClick(int xButtonId) => this.AddMouseXButtonDown(xButtonId).AddMouseXButtonUp(xButtonId);
/// <summary>
/// Adds a double click of the specified button.
/// </summary>
/// <param name="button"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseButtonDoubleClick(MouseButtonType button) => this.AddMouseButtonClick(button).AddMouseButtonClick(button);
/// <summary>
/// Adds a double click of the specified button.
/// </summary>
/// <param name="xButtonId"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseXButtonDoubleClick(int xButtonId) => this.AddMouseXButtonClick(xButtonId).AddMouseXButtonClick(xButtonId);
/// <summary>
/// Scroll the vertical mouse wheel by the specified amount.
/// </summary>
/// <param name="scrollAmount"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseVerticalWheelScroll(int scrollAmount)
{
MOUSEINPUT mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_WHEEL,
mouseData = scrollAmount,
};
var scroll = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = mi };
this.inputList.Add(scroll);
return this;
}
/// <summary>
/// Scroll the horizontal mouse wheel by the specified amount.
/// </summary>
/// <param name="scrollAmount"></param>
/// <returns>This <see cref="InputBuilder"/> instance.</returns>
public InputBuilder AddMouseHorizontalWheelScroll(int scrollAmount)
{
MOUSEINPUT mi = new MOUSEINPUT
{
dwFlags = MOUSEEVENTF.MOUSEEVENTF_HWHEEL,
mouseData = scrollAmount,
};
var scroll = new INPUT { type = INPUTTYPE.INPUT_MOUSE, mi = mi };
this.inputList.Add(scroll);
return this;
}
private static MOUSEEVENTF ToMouseButtonDownFlag(MouseButtonType button)
{
switch (button)
{
case MouseButtonType.Left:
return MOUSEEVENTF.MOUSEEVENTF_LEFTDOWN;
case MouseButtonType.Middle:
return MOUSEEVENTF.MOUSEEVENTF_MIDDLEDOWN;
case MouseButtonType.Right:
return MOUSEEVENTF.MOUSEEVENTF_RIGHTDOWN;
default:
throw new ArgumentException(nameof(button));
}
}
private static MOUSEEVENTF ToMouseButtonUpFlag(MouseButtonType button)
{
switch (button)
{
case MouseButtonType.Left:
return MOUSEEVENTF.MOUSEEVENTF_LEFTUP;
case MouseButtonType.Middle:
return MOUSEEVENTF.MOUSEEVENTF_MIDDLEUP;
case MouseButtonType.Right:
return MOUSEEVENTF.MOUSEEVENTF_RIGHTUP;
default:
throw new ArgumentException(nameof(button));
}
}
}
}
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