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109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
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/* If you are missing that file, acquire a complete release at teeworlds.com. */
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#include <engine/keys.h>
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#include "lineinput.h"
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CLineInput::CLineInput()
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{
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Clear();
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}
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void CLineInput::Clear()
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{
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mem_zero(m_Str, sizeof(m_Str));
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m_Len = 0;
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m_CursorPos = 0;
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m_NumChars = 0;
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}
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void CLineInput::Set(const char *pString)
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{
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str_copy(m_Str, pString, sizeof(m_Str));
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m_Len = str_length(m_Str);
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m_CursorPos = m_Len;
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m_NumChars = 0;
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int Offset = 0;
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while(pString[Offset])
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{
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Offset = str_utf8_forward(pString, Offset);
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++m_NumChars;
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}
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}
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bool CLineInput::Manipulate(IInput::CEvent e, char *pStr, int StrMaxSize, int StrMaxChars, int *pStrLenPtr, int *pCursorPosPtr, int *pNumCharsPtr)
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{
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int NumChars = *pNumCharsPtr;
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int CursorPos = *pCursorPosPtr;
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int Len = *pStrLenPtr;
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bool Changes = false;
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if(CursorPos > Len)
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CursorPos = Len;
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int Code = e.m_Unicode;
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int k = e.m_Key;
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// 127 is produced on Mac OS X and corresponds to the delete key
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if (!(Code >= 0 && Code < 32) && Code != 127)
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{
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char Tmp[8];
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int CharSize = str_utf8_encode(Tmp, Code);
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if (Len < StrMaxChars - CharSize && CursorPos < StrMaxSize - CharSize - Len && NumChars < StrMaxChars)
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{
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mem_move(pStr + CursorPos + CharSize, pStr + CursorPos, Len-CursorPos+1); // +1 == null term
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for(int i = 0; i < CharSize; i++)
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pStr[CursorPos+i] = Tmp[i];
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CursorPos += CharSize;
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Len += CharSize;
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if(CharSize > 0)
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++NumChars;
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Changes = true;
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}
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}
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if(e.m_Flags&IInput::FLAG_PRESS)
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{
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if (k == KEY_BACKSPACE && CursorPos > 0)
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{
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int NewCursorPos = str_utf8_rewind(pStr, CursorPos);
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int CharSize = CursorPos-NewCursorPos;
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mem_move(pStr+NewCursorPos, pStr+CursorPos, Len - NewCursorPos - CharSize + 1); // +1 == null term
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CursorPos = NewCursorPos;
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Len -= CharSize;
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if(CharSize > 0)
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--NumChars;
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Changes = true;
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}
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else if (k == KEY_DELETE && CursorPos < Len)
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{
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int p = str_utf8_forward(pStr, CursorPos);
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int CharSize = p-CursorPos;
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mem_move(pStr + CursorPos, pStr + CursorPos + CharSize, Len - CursorPos - CharSize + 1); // +1 == null term
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Len -= CharSize;
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if(CharSize > 0)
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--NumChars;
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Changes = true;
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}
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else if (k == KEY_LEFT && CursorPos > 0)
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CursorPos = str_utf8_rewind(pStr, CursorPos);
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else if (k == KEY_RIGHT && CursorPos < Len)
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CursorPos = str_utf8_forward(pStr, CursorPos);
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else if (k == KEY_HOME)
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CursorPos = 0;
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else if (k == KEY_END)
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CursorPos = Len;
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}
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*pNumCharsPtr = NumChars;
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*pCursorPosPtr = CursorPos;
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*pStrLenPtr = Len;
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return Changes;
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}
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void CLineInput::ProcessInput(IInput::CEvent e)
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{
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Manipulate(e, m_Str, MAX_SIZE, MAX_CHARS, &m_Len, &m_CursorPos, &m_NumChars);
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}
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