// terminalkeyboardcons.cpp

// 

// Copyright (c) 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

// 

// Initial Contributors:

// Accenture - Initial contribution

//

#include "terminalkeyboardcons.h"

#include <fshell/common.mmh>

#include <e32debug.h>

#include <fshell/memoryaccess.h>

const TInt KTkbdMessageId = 0xD6;

// These are the defaults unless overridden by --console-size

const TInt KWidth = 80;

const TInt KHeight = 24;

class CMessageWatcher : public CActive

	{

public:

	CMessageWatcher(CTerminalKeyboardCons& aConsole)

		: CActive(CActive::EPriorityStandard), iConsole(aConsole)

		{

		CActiveScheduler::Add(this);

		iConsole.iDriver.RequestMessage(iStatus);

		SetActive();

		}

	void DoCancel()

		{

		iConsole.iDriver.CancelMessage();

		}

	void RunL()

		{

		iConsole.MessageReceived(iStatus.Int());

		if (iStatus.Int() == KErrNone)

			{

			iConsole.iDriver.RequestMessage(iStatus);

			SetActive();

			}

		}

	~CMessageWatcher()

		{

		Cancel();

		}

private:

	CTerminalKeyboardCons& iConsole;

	};

CTerminalKeyboardCons::CTerminalKeyboardCons()

	: iTracker(TSize(KWidth, KHeight), this)

	{

	}

CTerminalKeyboardCons::~CTerminalKeyboardCons()

	{

	delete iIdleUpdateTimer;

	CleanupUnderlyingConsole();

	delete iWatcher;

	iDriver.Close();

	iTextBuffer.Close();

	iMungedTextBuffer.Close();

	}

TInt CTerminalKeyboardCons::Create(const TDesC& aTitle, TSize aSize)

	{

	TRAPD(err, ConstructL(aTitle, aSize));

	HandleConsoleCreationError(_L("TerminalKeyboard"), err);

	return err;

	}

void CTerminalKeyboardCons::ConstructL(const TDesC& aTitle, const TSize& aSize)

	{

	if (aTitle == _L("debug")) SetDebug(ETrue);

	if (aSize.iWidth > 10 && aSize.iHeight > 10)

		{

		// Override size now we know it, checking that it's sane-ish - be sure to do this before anything that uses the console size!

		new (&iTracker) TCursorTracker(aSize, this);

		}

	iTextBuffer.CreateMaxL(ScreenSize().iWidth * ScreenSize().iHeight);

#ifdef SHOW_TEXTSHELL_BORDERS

	iMungedTextBuffer.CreateL((ScreenSize().iWidth + 2) * (ScreenSize().iHeight + 2));

#endif

	iIdleUpdateTimer = CPeriodic::NewL(CActive::EPriorityLow); // Lower priority than the message watcher

	TInt err = User::LoadLogicalDevice(KTcLddDriverName);

	if (err && err != KErrAlreadyExists)

		{

		Message(EError, _L("Couldn't load LDD %S: %d"), &KTcLddDriverName, err);

		User::Leave(err);

		}

	// Idiotic driver only accepts connections from processes with nokia vid - like that will stop us

	TUint originalVid = RProcess().VendorId();

	RMemoryAccess memAccess;

	User::LeaveIfError(memAccess.Open());

	TProcessProperties props;

	props.iVid = 0x101FB657;

	RProcess me; me.Open(RProcess().Id());

	memAccess.SetProcessProperties(me, props);

	err = iDriver.Open();

	props.iVid = originalVid;

	memAccess.SetProcessProperties(me, props);

	me.Close();

	memAccess.Close();

	if (err)

		{

		Message(EError, _L("Couldn't open RTcDriver: %d"), err);

		User::Leave(err);

		}

	err = iDriver.Subscribe(KTkbdMessageId);

	if (err)

		{

		Message(EError, _L("Couldn't subscribe: %d"), err);

		User::Leave(err);

		}

	iWatcher = new(ELeave) CMessageWatcher(*this);

	CleanupUnderlyingConsole();

	ClearScreen();

	}

TInt CTerminalKeyboardCons::Extension_(TUint aExtensionId, TAny*& a0, TAny* a1)

	{

	/*if (aExtensionId == ConsoleMode::KSetConsoleModeExtension)

		{

		ConsoleMode::TMode mode = (ConsoleMode::TMode)(TInt)a1;

		iInputController->SetMode(mode);

		iOutputController->SetMode(mode);

		return KErrNone;

		}

	else*/

	/*else if (aExtensionId == ConsoleAttributes::KSetConsoleAttributesExtension)

		{

		ConsoleAttributes::TAttributes* attributes = (ConsoleAttributes::TAttributes*)a1;

		return iOutputController->SetAttributes(attributes->iAttributes, attributes->iForegroundColor, attributes->iBackgroundColor);

		}*/

	TInt ret = MIosrvConsoleHelper_Extension(aExtensionId, a0, a1);

	if (ret == KErrExtensionNotSupported) ret = CConsoleBase::Extension_(aExtensionId, a0, a1);

	return ret;

	}

void CTerminalKeyboardCons::MessageReceived(TInt aError)

	{

	Message(EDebug, _L("MessageReceived err=%d"), aError);

	TInt err = aError;

	if (err == KErrNone)

		{

		TPtrC8 data;

		err = iDriver.GetMessageData(data);

		if (!err && data.Length() < 1) err = KErrCorrupt;

		if (!err && !iGotKey)

			{

			TUint16 rawkey = data[0];

			Message(EDebug, _L("CTerminalKeyboardCons got key %d"), (TInt)rawkey);

			// Terminal keyboard doesn't support control keys or cursor keys so we use our own two-stage sticky modifier (like unix meta key I think?)

			if (iBacktickModifierDown)

				{

				// Terminal keyboard sends 2,4,6,8 for cursors, so we translate backtick-2 (ie backtick-leftarrow) as meaning left arrow

				if (rawkey == '2') rawkey = (TUint16)EKeyUpArrow;

				else if (rawkey == '4') rawkey = (TUint16)EKeyLeftArrow;

				else if (rawkey == '6') rawkey = (TUint16)EKeyRightArrow;

				else if (rawkey == '8') rawkey = (TUint16)EKeyDownArrow;

				else if (rawkey >= 'a' && rawkey <= 'z')

					{

					// backtick-c means CTRL-C

					rawkey = rawkey - 'a'+1;

					}

				else if (rawkey == ' ') rawkey = '`'; // backtick-space is how you do a backtick

				else if (rawkey == '`') rawkey = (TUint16)EKeyEscape; // backtick-backtick is 'escape'

				else if (rawkey == '1') rawkey = (TUint16)EKeyTab; // backtick-1 is 'tab'

				iBacktickModifierDown = EFalse;

				Message(EDebug, _L("Backtick escape converted to %d"), (TInt)rawkey);

				}

			else if (rawkey == '`')

				{

				iBacktickModifierDown = ETrue;

				return;

				}

			iKeyCode = (TKeyCode)rawkey; // Close enough for now!

			iGotKey = ETrue;

			}

		}

	if (iClientStatus)

		{

		User::RequestComplete(iClientStatus, err);

		if (err == KErrNone) iGotKey = EFalse;

		}

	}

void CTerminalKeyboardCons::Read(TRequestStatus& aStatus)

	{

	/*if (iClientStatus)

		{

		TRequestStatus* stat = &aStatus;

		User::RequestComplete(stat, KErrInUse);

		}

	else*/

		{

		aStatus = KRequestPending;

		iClientStatus = &aStatus;

		if (iGotKey)

			{

			iGotKey = EFalse;

			User::RequestComplete(iClientStatus, KErrNone);

			}

		}

	}

void CTerminalKeyboardCons::ReadCancel()

	{

	if (iClientStatus)

		{

		User::RequestComplete(iClientStatus, KErrCancel);

		}

	}

void CTerminalKeyboardCons::Write(const TDesC& aDes)

	{

	for (TInt i = 0; i < aDes.Length(); i++)

		{

		TInt textBufPos = CursorPos().iY * ScreenSize().iWidth + CursorPos().iX;

		TChar ch(aDes[i]);

		iTracker.WriteChar(ch);

		if (ch.IsPrint()) iTextBuffer[textBufPos] = aDes[i];

		}

	Update();

	}

TPoint CTerminalKeyboardCons::CursorPos() const

	{

	return iTracker.CursorPos();

	}

void CTerminalKeyboardCons::SetCursorPosAbs(const TPoint& aPoint)

	{

	iTracker.SetCursorPosAbs(aPoint);

	}

void CTerminalKeyboardCons::SetCursorPosRel(const TPoint& aPoint)

	{

	iTracker.SetCursorPosRel(aPoint);

	}

void CTerminalKeyboardCons::SetCursorHeight(TInt /*aPercentage*/)

	{

	//iOutputController->SetCursorHeight(aPercentage);

	}

void CTerminalKeyboardCons::SetTitle(const TDesC& /*aDes*/)

	{

	//iOutputController->SetTitle(aDes);

	}

void CTerminalKeyboardCons::ClearScreen()

	{

	SetCursorPosAbs(TPoint(0,0));

	iTextBuffer.Fill(' ');

	Update();

	}

void CTerminalKeyboardCons::ClearToEndOfLine()

	{

	iTextBuffer.MidTPtr(CursorPos().iY * ScreenSize().iWidth + CursorPos().iX, ScreenSize().iWidth - CursorPos().iX).Fill(' ');

	Update();

	}

TSize CTerminalKeyboardCons::ScreenSize() const

	{

	return iTracker.ConsoleSize();

	}

TKeyCode CTerminalKeyboardCons::KeyCode() const

	{

	return iKeyCode;

	}

TUint CTerminalKeyboardCons::KeyModifiers() const

	{

	return iKeyModifiers;

	}

// All these magic vals are as per the DOS 437 codepage http://en.wikipedia.org/wiki/CP437 and not Windows-1252 like the ws_win.cpp source incorrectly states

// See also http://en.wikipedia.org/wiki/Box_drawing_characters

enum

	{

	EBoxHorizontalBar = 0xCD,

	EBoxVerticalBar = 0xBA,

	EBoxTopLeft = 0xC9,

	EBoxTopRight = 0xBB,

	EBoxBottomLeft = 0xC8,

	EBoxBottomRight = 0xBC,

	};

void CTerminalKeyboardCons::Update()

	{

	// Delay updates to the screen, to improve performance

	static const TInt KDelay = 100000; // 0.1s

	if (!iIdleUpdateTimer->IsActive())

		{

		// Don't reset timer if we're already running - otherwise constant typing will never show up until you stop pressing keys

		iIdleUpdateTimer->Start(KDelay, KDelay, TCallBack(&UpdateCallback, this));

		}

	}

TInt CTerminalKeyboardCons::UpdateCallback(TAny* aSelf)

	{

	static_cast<CTerminalKeyboardCons*>(aSelf)->DoUpdate();

	return 0;

	}

void CTerminalKeyboardCons::DoUpdate()

	{

	iIdleUpdateTimer->Cancel(); // Stop any further updates

#ifdef SHOW_TEXTSHELL_BORDERS

	// Update munged buffer

	const TInt contentWidth = ScreenSize().iWidth;

	const TInt width = contentWidth + 2;

	iMungedTextBuffer.SetLength(width);

	iMungedTextBuffer.Fill(TChar(EBoxHorizontalBar));

	iMungedTextBuffer[0] = EBoxTopLeft;

	iMungedTextBuffer[width-1] = EBoxTopRight;

	for (TInt i = 0; i < ScreenSize().iHeight; i++)

		{

		TPtrC line(iTextBuffer.Mid(i*contentWidth, contentWidth));

		iMungedTextBuffer.AppendFormat(_L("%c%S%c"), EBoxVerticalBar, &line, EBoxVerticalBar);

		}

	iMungedTextBuffer.Append(EBoxBottomLeft);

	iMungedTextBuffer.SetLength(iMungedTextBuffer.Length() + contentWidth);

	iMungedTextBuffer.RightTPtr(contentWidth).Fill(EBoxHorizontalBar);

	iMungedTextBuffer.Append(EBoxBottomRight);

	// And send the munged buffer

	Transmit(iMungedTextBuffer, width, ScreenSize().iHeight + 2);

#else

	// Just send it straight

	Transmit(iTextBuffer, ScreenSize().iWidth, ScreenSize().iHeight);

#endif

	}

void CTerminalKeyboardCons::Transmit(const TDesC& aBuf, TInt aWidth, TInt aHeight)

	{

	// This is how terminal keyboard does it - pretty horrible really

	static const TInt KMaxLen = 200; // This is what terminal keyboard uses - technically you could go as far as a total of 256

	TInt numLinesPerPrint = KMaxLen / aWidth;

	TBuf<256> line;

	TInt startLine = 0;

	while (startLine < aHeight)

		{

		if (startLine == 0)

			{

			// First line has extra info

			line.Format(_L("#$STIConsole#$%02d%02X%02X"), startLine, aWidth, aHeight);

			}

		else

			{

			line.Format(_L("#$STIConsole#$%02d"), startLine);

			}

		for (TInt i = 0; i < numLinesPerPrint; i++)

			{

			TPtrC theContents(aBuf.Mid((startLine+i)*aWidth, aWidth));

			//RDebug::Printf("line len=%d theContents len=%d", line.Length(), theContents.Length());

			line.Append(theContents);

			}

		RDebug::Print(line);

		startLine += numLinesPerPrint;

		}

	}

void CTerminalKeyboardCons::ConsoleScrolled(TInt aNumberOfLines)

	{

	TInt numChars = Abs(aNumberOfLines) * ScreenSize().iWidth;

	if (aNumberOfLines > 0)

		{

		iTextBuffer.Delete(0, numChars);

		iTextBuffer.AppendFill(' ', numChars);

		}

	else if (aNumberOfLines < 0)

		{

		iTextBuffer.SetLength(iTextBuffer.Length() - numChars);

		while (numChars--) iTextBuffer.Insert(0, _L(" "));

		}

	}

extern "C" EXPORT_C TAny* NewConsole()

	{

	return new CTerminalKeyboardCons;

	}