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using Ryujinx.HLE.UI;
using Ryujinx.Memory;
using System;
using System.Threading;
namespace Ryujinx.HLE.HOS.Applets.SoftwareKeyboard
{
/// <summary>
/// Class that manages the renderer base class and its state in a multithreaded context.
/// </summary>
internal class SoftwareKeyboardRenderer : IDisposable
{
private const int TextBoxBlinkSleepMilliseconds = 100;
private const int RendererWaitTimeoutMilliseconds = 100;
private readonly object _stateLock = new();
private readonly SoftwareKeyboardUIState _state = new();
private readonly SoftwareKeyboardRendererBase _renderer;
private readonly TimedAction _textBoxBlinkTimedAction = new();
private readonly TimedAction _renderAction = new();
public SoftwareKeyboardRenderer(IHostUITheme uiTheme)
{
_renderer = new SoftwareKeyboardRendererBase(uiTheme);
StartTextBoxBlinker(_textBoxBlinkTimedAction, _state, _stateLock);
StartRenderer(_renderAction, _renderer, _state, _stateLock);
}
private static void StartTextBoxBlinker(TimedAction timedAction, SoftwareKeyboardUIState state, object stateLock)
{
timedAction.Reset(() =>
{
lock (stateLock)
{
// The blinker is on half of the time and events such as input
// changes can reset the blinker.
state.TextBoxBlinkCounter = (state.TextBoxBlinkCounter + 1) % (2 * SoftwareKeyboardRendererBase.TextBoxBlinkThreshold);
// Tell the render thread there is something new to render.
Monitor.PulseAll(stateLock);
}
}, TextBoxBlinkSleepMilliseconds);
}
private static void StartRenderer(TimedAction timedAction, SoftwareKeyboardRendererBase renderer, SoftwareKeyboardUIState state, object stateLock)
{
SoftwareKeyboardUIState internalState = new();
bool canCreateSurface = false;
bool needsUpdate = true;
timedAction.Reset(() =>
{
lock (stateLock)
{
if (!Monitor.Wait(stateLock, RendererWaitTimeoutMilliseconds))
{
return;
}
#pragma warning disable IDE0055 // Disable formatting
needsUpdate = UpdateStateField(ref state.InputText, ref internalState.InputText);
needsUpdate |= UpdateStateField(ref state.CursorBegin, ref internalState.CursorBegin);
needsUpdate |= UpdateStateField(ref state.CursorEnd, ref internalState.CursorEnd);
needsUpdate |= UpdateStateField(ref state.AcceptPressed, ref internalState.AcceptPressed);
needsUpdate |= UpdateStateField(ref state.CancelPressed, ref internalState.CancelPressed);
needsUpdate |= UpdateStateField(ref state.OverwriteMode, ref internalState.OverwriteMode);
needsUpdate |= UpdateStateField(ref state.TypingEnabled, ref internalState.TypingEnabled);
needsUpdate |= UpdateStateField(ref state.ControllerEnabled, ref internalState.ControllerEnabled);
needsUpdate |= UpdateStateField(ref state.TextBoxBlinkCounter, ref internalState.TextBoxBlinkCounter);
#pragma warning restore IDE0055
canCreateSurface = state.SurfaceInfo != null && internalState.SurfaceInfo == null;
if (canCreateSurface)
{
internalState.SurfaceInfo = state.SurfaceInfo;
}
}
if (canCreateSurface)
{
renderer.CreateSurface(internalState.SurfaceInfo);
}
if (needsUpdate)
{
renderer.DrawMutableElements(internalState);
renderer.CopyImageToBuffer();
needsUpdate = false;
}
});
}
private static bool UpdateStateField<T>(ref T source, ref T destination) where T : IEquatable<T>
{
if (!source.Equals(destination))
{
destination = source;
return true;
}
return false;
}
public void UpdateTextState(string inputText, int? cursorBegin, int? cursorEnd, bool? overwriteMode, bool? typingEnabled)
{
lock (_stateLock)
{
// Update the parameters that were provided.
_state.InputText = inputText ?? _state.InputText;
_state.CursorBegin = Math.Max(0, cursorBegin.GetValueOrDefault(_state.CursorBegin));
_state.CursorEnd = Math.Min(cursorEnd.GetValueOrDefault(_state.CursorEnd), _state.InputText.Length);
_state.OverwriteMode = overwriteMode.GetValueOrDefault(_state.OverwriteMode);
_state.TypingEnabled = typingEnabled.GetValueOrDefault(_state.TypingEnabled);
var begin = _state.CursorBegin;
var end = _state.CursorEnd;
_state.CursorBegin = Math.Min(begin, end);
_state.CursorEnd = Math.Max(begin, end);
// Reset the cursor blink.
_state.TextBoxBlinkCounter = 0;
// Tell the render thread there is something new to render.
Monitor.PulseAll(_stateLock);
}
}
public void UpdateCommandState(bool? acceptPressed, bool? cancelPressed, bool? controllerEnabled)
{
lock (_stateLock)
{
// Update the parameters that were provided.
_state.AcceptPressed = acceptPressed.GetValueOrDefault(_state.AcceptPressed);
_state.CancelPressed = cancelPressed.GetValueOrDefault(_state.CancelPressed);
_state.ControllerEnabled = controllerEnabled.GetValueOrDefault(_state.ControllerEnabled);
// Tell the render thread there is something new to render.
Monitor.PulseAll(_stateLock);
}
}
public void SetSurfaceInfo(RenderingSurfaceInfo surfaceInfo)
{
lock (_stateLock)
{
_state.SurfaceInfo = surfaceInfo;
// Tell the render thread there is something new to render.
Monitor.PulseAll(_stateLock);
}
}
internal bool DrawTo(IVirtualMemoryManager destination, ulong position)
{
return _renderer.WriteBufferToMemory(destination, position);
}
public void Dispose()
{
_textBoxBlinkTimedAction.RequestCancel();
_renderAction.RequestCancel();
}
}
}
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