Method DeletePreviousChar

GUI/RichTextarea.cpp:1626–1667

}

void TextareaData::DeletePreviousChar()
{
	// If cursor is not at the beginning of a line
	if(cursorCharX)
	{
		history->TakeSnapshot(currLine, HistoryManager::LINES_CHANGED, 1);
		// If cursor is in the middle, move characters to the vacant position
		if(cursorCharX != currLine->length)
			memmove(&currLine->data[cursorCharX-1], &currLine->data[cursorCharX], (currLine->length - cursorCharX) * sizeof(AreaChar));
		// Shrink line size and move cursor
		currLine->length--;
		cursorCharX--;
		// Force redraw on the updated region
		RECT invalid = { 0, (cursorCharY - shiftCharY) * RichTextarea::charHeight, areaWidth, (cursorCharY - shiftCharY + 1) * RichTextarea::charHeight };
		InvalidateRect(areaWnd, &invalid, false);
	}else if(currLine->prev){	// If it's at the beginning of a line and there is a line before current
		// Add current line to the previous, as if are removing the line break
		currLine = currLine->prev;

		history->TakeSnapshot(currLine, HistoryManager::LINES_DELETED, 2);
		// Check if there is enough space
		unsigned int sum = currLine->length + currLine->next->length;
		ExtendLine(currLine, sum);
		// Append one line to the other
		memcpy(&currLine->data[currLine->length], currLine->next->data, currLine->next->length * sizeof(AreaChar));

		// Update cursor position
		cursorCharX = currLine->length;
		cursorCharY--;

		// Update line length
		currLine->length = sum;

		// Remove line that was current before event
		DeleteLine(currLine->next);
		lineCount--;

		// Force redraw on the updated region
		RECT invalid = { 0, (cursorCharY - shiftCharY - 1) * RichTextarea::charHeight, areaWidth, areaHeight };
		InvalidateRect(areaWnd, &invalid, false);
	}
}

void TextareaData::OnCopyOrCut(bool cut)
{