void
TextGapBuffer::InsertText(BFile *file, int32 fileOffset, int32 inNumItems, int32 inAtIndex)
{
off_t fileSize;
if (file->GetSize(&fileSize) != B_OK
|| !file->IsReadable())
return;
// Clamp the text length to the file size
fileSize -= fileOffset;
if (fileSize < inNumItems)
inNumItems = fileSize;
if (inNumItems < 1)
return;
inAtIndex = (inAtIndex > fItemCount) ? fItemCount : inAtIndex;
inAtIndex = (inAtIndex < 0) ? 0 : inAtIndex;
if (inAtIndex != fGapIndex)
MoveGapTo(inAtIndex);
if (fGapCount < inNumItems)
SizeGapTo(inNumItems + kTextGapBufferBlockSize);
// Finally, read the data and put it into the buffer
if (file->ReadAt(fileOffset, fBuffer + fGapIndex, inNumItems) > 0) {
fGapCount -= inNumItems;
fGapIndex += inNumItems;
fItemCount += inNumItems;
}
}
const char *
TextGapBuffer::RealText()
{
MoveGapTo(fItemCount);
fBuffer[fItemCount] = '\0';
return fBuffer;
}
const char *
TextGapBuffer::RealText()
{
MoveGapTo(fItemCount);
if (fGapCount == 0)
SizeGapTo(kTextGapBufferBlockSize);
fBuffer[fItemCount] = '\0';
return fBuffer;
}
void
TextGapBuffer::RemoveRange(int32 start, int32 end)
{
long inAtIndex = start;
long inNumItems = end - start;
if (inNumItems < 1)
return;
inAtIndex = (inAtIndex > fItemCount - 1) ? (fItemCount - 1) : inAtIndex;
inAtIndex = (inAtIndex < 0) ? 0 : inAtIndex;
MoveGapTo(inAtIndex);
fGapCount += inNumItems;
fItemCount -= inNumItems;
if (fGapCount > kTextGapBufferBlockSize)
SizeGapTo(kTextGapBufferBlockSize);
}
void
TextGapBuffer::InsertText(const char *inText, int32 inNumItems, int32 inAtIndex)
{
if (inNumItems < 1)
return;
inAtIndex = (inAtIndex > fItemCount) ? fItemCount : inAtIndex;
inAtIndex = (inAtIndex < 0) ? 0 : inAtIndex;
if (inAtIndex != fGapIndex)
MoveGapTo(inAtIndex);
if (fGapCount < inNumItems)
SizeGapTo(inNumItems + kTextGapBufferBlockSize);
memcpy(fBuffer + fGapIndex, inText, inNumItems);
fGapCount -= inNumItems;
fGapIndex += inNumItems;
fItemCount += inNumItems;
}