bool IDockScreenDisplay::EvalBool (const CString &sCode, bool *retbResult, CString *retsError)
// EvalBool
//
// Evaluates the given string
{
CCodeChainCtx Ctx;
Ctx.SetScreen(m_pDockScreen);
Ctx.SaveAndDefineSourceVar(m_pLocation);
Ctx.SaveAndDefineDataVar(m_pData);
char *pPos = sCode.GetPointer();
ICCItem *pExp = Ctx.Link(sCode, 1, NULL);
ICCItem *pResult = Ctx.Run(pExp); // LATER:Event
Ctx.Discard(pExp);
if (pResult->IsError())
{
*retsError = pResult->GetStringValue();
Ctx.Discard(pResult);
return false;
}
*retbResult = !pResult->IsNil();
Ctx.Discard(pResult);
return true;
}
ALERROR CExtension::LoadGlobalsElement (SDesignLoadCtx &Ctx, CXMLElement *pDesc)
// LoadGlobalsElement
//
// Loads <Globals>
{
CCodeChainCtx CCCtx;
// Parse the code and keep it
ICCItem *pCode = CCCtx.Link(pDesc->GetContentText(0), 0, NULL);
if (pCode->IsError())
{
Ctx.sError = strPatternSubst(CONSTLIT("%s globals: %s"), Ctx.sErrorFilespec, pCode->GetStringValue());
return ERR_FAIL;
}
SGlobalsEntry *pEntry = m_Globals.Insert();
pEntry->pCode = pCode;
pEntry->sFilespec = Ctx.sErrorFilespec;
#ifdef DEBUG_GLOBALS
::kernelDebugLogMessage("Loading globals in %s", Ctx.sErrorFilespec);
#endif
return NOERROR;
}
CSpaceObject *IDockScreenDisplay::EvalListSource (const CString &sString, CString *retsError)
// EvalListSource
//
// Returns the object from which we should display items
{
char *pPos = sString.GetPointer();
// See if we need to evaluate
if (*pPos == '=')
{
CCodeChainCtx Ctx;
Ctx.SetScreen(this);
Ctx.SaveAndDefineSourceVar(m_pLocation);
Ctx.SaveAndDefineDataVar(m_pData);
ICCItem *pExp = Ctx.Link(sString, 1, NULL);
ICCItem *pResult = Ctx.Run(pExp); // LATER:Event
Ctx.Discard(pExp);
if (pResult->IsError())
{
*retsError = pResult->GetStringValue();
Ctx.Discard(pResult);
return NULL;
}
// Convert to an object pointer
CSpaceObject *pSource;
if (strEquals(pResult->GetStringValue(), DATA_FROM_PLAYER))
pSource = m_pPlayer->GetShip();
else if (strEquals(pResult->GetStringValue(), DATA_FROM_STATION)
|| strEquals(pResult->GetStringValue(), DATA_FROM_SOURCE))
pSource = m_pLocation;
else
pSource = Ctx.AsSpaceObject(pResult);
Ctx.Discard(pResult);
return pSource;
}
// Otherwise, compare to constants
else if (strEquals(sString, DATA_FROM_PLAYER))
return m_pPlayer->GetShip();
else
return m_pLocation;
}
ALERROR CLanguageDataBlock::InitFromXML (SDesignLoadCtx &Ctx, CXMLElement *pDesc)
// InitFromXML
//
// Initializes from an XML block
{
int i;
for (i = 0; i < pDesc->GetContentElementCount(); i++)
{
CXMLElement *pItem = pDesc->GetContentElement(i);
CString sID = pItem->GetAttribute(ID_ATTRIB);
if (sID.IsBlank())
{
Ctx.sError = strPatternSubst(CONSTLIT("Invalid id in <Language> block"));
return ERR_FAIL;
}
if (strEquals(pItem->GetTag(), TEXT_TAG))
{
// Link the code
CCodeChainCtx CCCtx;
ICCItem *pCode = CCCtx.Link(pItem->GetContentText(0), 0, NULL);
if (pCode->IsError())
{
Ctx.sError = strPatternSubst(CONSTLIT("Language id: %s : %s"), sID, pCode->GetStringValue());
return ERR_FAIL;
}
// Add an entry
bool bIsNew;
SEntry *pEntry = m_Data.SetAt(sID, &bIsNew);
if (!bIsNew)
{
Ctx.sError = strPatternSubst(CONSTLIT("Duplicate <Language> element: %s"), sID);
return ERR_FAIL;
}
// If pCode is a string and not an identifier, then we can just
// store it directly.
if (pCode->IsIdentifier() && pCode->IsQuoted())
{
pEntry->pCode = NULL;
pEntry->sText = pCode->GetStringValue();
}
// Otherwise we store the code
else
pEntry->pCode = pCode->Reference();
// Done
CCCtx.Discard(pCode);
}
else if (strEquals(pItem->GetTag(), MESSAGE_TAG))
{
// Add an entry
bool bIsNew;
SEntry *pEntry = m_Data.SetAt(sID, &bIsNew);
if (!bIsNew)
{
Ctx.sError = strPatternSubst(CONSTLIT("Duplicate <Language> element: %s"), sID);
return ERR_FAIL;
}
// Set the text
pEntry->pCode = NULL;
pEntry->sText = pItem->GetAttribute(TEXT_ATTRIB);
}
else
{
Ctx.sError = strPatternSubst(CONSTLIT("Invalid element in <Language> block: <%s>"), pItem->GetTag());
return ERR_FAIL;
}
}
return NOERROR;
}
void Run (CUniverse &Universe, CXMLElement *pCmdLine)
{
ALERROR error;
int i;
CCodeChain &CC = g_pUniverse->GetCC();
bool bNoLogo = pCmdLine->GetAttributeBool(NO_LOGO_SWITCH);
// Prepare the universe
CTopologyNode *pNode = g_pUniverse->GetFirstTopologyNode();
if (pNode == NULL)
{
printf("ERROR: No topology node found.\n");
return;
}
CSystem *pSystem;
if (error = g_pUniverse->CreateStarSystem(pNode, &pSystem))
{
printf("ERROR: Unable to create star system.\n");
return;
}
// Set the POV
CSpaceObject *pPOV = pSystem->GetObject(0);
g_pUniverse->SetPOV(pPOV);
pSystem->SetPOVLRS(pPOV);
// Prepare system
g_pUniverse->UpdateExtended();
g_pUniverse->GarbageCollectLibraryBitmaps();
CString sCommand = pCmdLine->GetAttribute(RUN_SWITCH);
CString sRunFile = pCmdLine->GetAttribute(RUN_FILE_SWITCH);
// If this is a run file, then we parse it and run it
if (!sRunFile.IsBlank() && !strEquals(sRunFile, CONSTLIT("true")))
{
TArray<CString> Files;
ParseStringList(sRunFile, PSL_FLAG_ALLOW_WHITESPACE, &Files);
for (i = 0; i < Files.GetCount(); i++)
RunFile(Files[i], bNoLogo);
}
// If we have a command, invoke it
else if (!sCommand.IsBlank() && !strEquals(sCommand, CONSTLIT("True")))
{
CCodeChainCtx Ctx;
ICCItem *pCode = Ctx.Link(sCommand, 0, NULL);
ICCItem *pResult = Ctx.Run(pCode);
CString sOutput;
if (pResult->IsIdentifier())
sOutput = pResult->Print(&CC, PRFLAG_NO_QUOTES | PRFLAG_ENCODE_FOR_DISPLAY);
else
sOutput = CC.Unlink(pResult);
Ctx.Discard(pResult);
Ctx.Discard(pCode);
// Output result
printf("%s\n", sOutput.GetASCIIZPointer());
}
// Otherwise, we enter a command loop
else
{
// Welcome
if (!bNoLogo)
{
printf("(help) for function help.\n");
printf("\\q to quit.\n\n");
}
// Loop
while (true)
{
char szBuffer[1024];
if (!bNoLogo)
printf(": ");
gets_s(szBuffer, sizeof(szBuffer)-1);
CString sCommand(szBuffer);
// Escape codes
if (*sCommand.GetASCIIZPointer() == '\\')
{
// Quit command
if (strStartsWith(sCommand, CONSTLIT("\\q")))
break;
else if (strStartsWith(sCommand, CONSTLIT("\\?"))
|| strStartsWith(sCommand, CONSTLIT("\\h")))
{
printf("TLisp Shell\n\n");
printf("\\h Show this help\n");
printf("\\q Quit\n");
printf("\n(help) for function help.\n");
}
}
// Null command
else if (sCommand.IsBlank())
NULL;
// Command
else
{
CCodeChainCtx Ctx;
ICCItem *pCode = Ctx.Link(sCommand, 0, NULL);
ICCItem *pResult = Ctx.Run(pCode);
CString sOutput;
if (pResult->IsIdentifier())
sOutput = pResult->Print(&CC, PRFLAG_NO_QUOTES | PRFLAG_ENCODE_FOR_DISPLAY);
else
sOutput = CC.Unlink(pResult);
Ctx.Discard(pResult);
Ctx.Discard(pCode);
// Output result
printf("%s\n", sOutput.GetASCIIZPointer());
}
}
}
}
void RunFile (const CString &sFilespec, bool bNoLogo)
{
ALERROR error;
CCodeChain &CC = g_pUniverse->GetCC();
CCodeChainCtx Ctx;
// Verify the file
CString sRunFile = sFilespec;
if (!strEndsWith(sRunFile, CONSTLIT("."))
&& pathGetExtension(sRunFile).IsBlank())
sRunFile.Append(CONSTLIT(".tlisp"));
// Open the file
CFileReadBlock InputFile(sRunFile);
if (error = InputFile.Open())
{
printf("error : Unable to open file '%s'.\n", sRunFile.GetASCIIZPointer());
return;
}
if (!bNoLogo)
printf("%s\n", sRunFile.GetASCIIZPointer());
// Parse
CString sInputFile(InputFile.GetPointer(0), InputFile.GetLength(), TRUE);
CString sOutput;
int iOffset = 0;
while (true)
{
int iCharCount;
ICCItem *pCode = Ctx.Link(sInputFile, iOffset, &iCharCount);
if (pCode->IsNil())
break;
else if (pCode->IsError())
{
printf("error : %s\n", pCode->GetStringValue().GetASCIIZPointer());
Ctx.Discard(pCode);
return;
}
iOffset += iCharCount;
// Execute
ICCItem *pResult = Ctx.Run(pCode);
// Compose output
if (pResult->IsIdentifier())
sOutput = pResult->Print(&CC, PRFLAG_NO_QUOTES | PRFLAG_ENCODE_FOR_DISPLAY);
else
sOutput = CC.Unlink(pResult);
// Free
Ctx.Discard(pResult);
Ctx.Discard(pCode);
}
// Output result
printf("%s\n", sOutput.GetASCIIZPointer());
}
void CCommandLineDisplay::OnKeyDown (int iVirtKey, DWORD dwKeyState)
// OnKeyDown
//
// Handle WM_KEYDOWN
{
switch (iVirtKey)
{
case VK_BACK:
InputBackspace();
break;
case VK_DELETE:
InputDelete();
break;
case VK_RETURN:
{
CString sInput = GetInput();
if (!sInput.IsBlank())
{
CCodeChain &CC = g_pUniverse->GetCC();
InputEnter();
CCodeChainCtx Ctx;
ICCItem *pCode = Ctx.Link(sInput, 0, NULL);
ICCItem *pResult = Ctx.Run(pCode);
CString sOutput;
if (pResult->IsIdentifier())
sOutput = pResult->Print(&CC, PRFLAG_NO_QUOTES | PRFLAG_ENCODE_FOR_DISPLAY);
else
sOutput = CC.Unlink(pResult);
Ctx.Discard(pResult);
Ctx.Discard(pCode);
Output(sOutput);
}
break;
}
case VK_TAB:
{
AutoCompleteSearch();
break;
}
case VK_UP:
InputHistoryUp();
break;
case VK_DOWN:
InputHistoryDown();
break;
case VK_LEFT:
if (m_iCursorPos > 0) m_iCursorPos--;
m_bInvalid = true;
break;
case VK_RIGHT:
if (m_iCursorPos < m_sInput.GetLength()) m_iCursorPos++;
m_bInvalid = true;
break;
case VK_HOME:
m_iCursorPos = 0;
m_bInvalid = true;
break;
case VK_END:
m_iCursorPos = m_sInput.GetLength();
m_bInvalid = true;
break;
case VK_PRIOR:
if (m_iScrollPos < 2*MAX_LINES) m_iScrollPos++;
m_bInvalid = true;
break;
case VK_NEXT:
if (m_iScrollPos > 0) m_iScrollPos--;
m_bInvalid = true;
break;
}
}
