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// Purpose: input line with history (wxTextCtrl+wxSpinButton)
// Copyright: (c) 2007 Marcin Wojdyr
// Licence: wxWidgets licence, or (at your option) GPL ver. 2+
/// Input line with history (wxTextCtrl+wxSpinButton).
/// Supported keybindings:
/// up / Ctrl-p Move `back' through the history list,
/// fetching the previous command.
/// down / Ctrl-n Move `forward' through the history list,
/// fetching the next command.
/// page up Move to the first line in the history.
/// page down Move to the end of the input history,
/// i.e., the line currently being entered.
/// Ctrl-a Move to the start of the line.
/// Ctrl-e Move to the end of the line.
/// Ctrl-k Cut the text from the current cursor position
/// to the end of the line.
/// Ctrl-u Cut backward from the cursor to the beginning
/// of the current line.
/// Ctrl-y Yank, the same as Ctrl-V
/// This control was originally written for Fityk (http://fityk.sf.net)
#include <wx/wx.h>
#include <stdio.h> // fgets()
#include "inputline.h"
#include "cmn.h"
InputLine::InputLine(wxWindow *parent, wxWindowID id,
InputLineObserver* observer, wxString const& hist_file_)
: wxPanel(parent, id), m_hpos(0), m_observer(observer),
hist_file(hist_file_)
{
wxBoxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
m_text = new wxTextCtrl(this, wxID_ANY, wxT(""),
wxDefaultPosition, wxDefaultSize,
wxWANTS_CHARS|wxTE_PROCESS_ENTER /*|wxTE_PROCESS_TAB*/);
sizer->Add(m_text, 1, wxEXPAND);
// wxGTK3 has [+][-] instead of the up/down spin buttons.
// Better to not have it at all.
#ifndef __WXGTK3__
m_button = new wxSpinButton(this, wxID_ANY,
wxDefaultPosition, wxDefaultSize,
wxSP_VERTICAL|wxSP_ARROW_KEYS|wxNO_BORDER);
m_button->SetRange(0, 0);
m_button->SetValue(0);
sizer->Add(m_button, 0, wxEXPAND);
#if !wxCHECK_VERSION(2, 9, 0)
# define wxEVT_SPIN wxEVT_SCROLL_THUMBTRACK
#endif
m_button->Connect(wxEVT_SPIN, wxSpinEventHandler(InputLine::OnSpinButton),
NULL, this);
m_button->Connect(wxEVT_KEY_DOWN,
wxKeyEventHandler(InputLine::OnKeyDownAtSpinButton),
NULL, this);
#endif // not __WXGTK3__
m_text->Connect(wxEVT_KEY_DOWN,
wxKeyEventHandler(InputLine::OnKeyDownAtText),
NULL, this);
SetSizer(sizer);
SetMinSize(wxSize(-1, m_text->GetBestSize().y));
// read history
if (!hist_file.IsEmpty()) {
FFile f(hist_file, "r");
if (f.IsOpened()) {
char line[512];
while (fgets(line, 512, f.fp())) {
wxString s = wxString(line, wxConvUTF8).Trim();
if (!s.empty())
m_history.Add(s);
}
}
}
// add empty line that will be displayed initially
m_history.Add(wxT(""));
GoToHistoryEnd();
}
InputLine::~InputLine()
{
// write history
if (hist_file.IsEmpty())
return;
FFile f(hist_file, "w");
if (!f.IsOpened())
return;
for (size_t i = 0; i < m_history.GetCount(); ++i)
f.Write(m_history[i] + "\n", wxConvUTF8);
}
wxSize InputLine::DoGetBestSize() const
{
return wxSize(wxPanel::DoGetBestSize().x, m_text->GetMinSize().y);
}
void InputLine::RedirectKeyPress(wxKeyEvent& event)
{
m_text->SetFocus();
m_text->SetInsertionPointEnd();
m_text->EmulateKeyPress(event);
}
void InputLine::HistoryMove(int n, bool relative)
{
int new_pos = relative ? m_hpos + n : n;
if (!relative && n < 0)
new_pos += m_history.GetCount();
if (new_pos == m_hpos || new_pos<0 || new_pos >= (int)m_history.GetCount())
return;
// save line editing
m_history[m_hpos] = m_text->GetValue();
m_hpos = new_pos;
m_text->SetValue(m_history[new_pos]);
#ifndef __WXGTK3__
m_button->SetValue(m_history.GetCount() - 1 - new_pos);
#endif // not __WXGTK3__
m_text->SetFocus();
m_text->SetInsertionPointEnd();
}
void InputLine::OnInputLine(const wxString& line)
{
m_history.Last() += line;
if (line.EndsWith('\\')) {
*(m_history.Last().end()-1) = ' ';
return;
}
m_observer->ProcessInputLine(m_history.Last());
m_history.Add("");
GoToHistoryEnd();
m_text->SetFocus();
}
void InputLine::GoToHistoryEnd()
{
const int hist_size = 1024;
const int hist_chunk = 128;
if (m_history.GetCount() > hist_size + hist_chunk)
m_history.RemoveAt(0, m_history.GetCount() - hist_size);
m_hpos = m_history.GetCount() - 1;
#ifndef __WXGTK3__
m_button->SetRange(0, m_hpos);
m_button->SetValue(0);
#endif // not __WXGTK3__
}
void InputLine::OnKeyDownAtText (wxKeyEvent& event)
{
if (event.ControlDown()) {
switch (event.m_keyCode) {
case 'A':
m_text->SetInsertionPoint(0);
return;
case 'E':
m_text->SetInsertionPointEnd();
return;
case 'P':
HistoryMove(-1, true);
return;
case 'N':
HistoryMove(+1, true);
return;
case 'K':
m_text->SetSelection(m_text->GetInsertionPoint(),
m_text->GetLastPosition());
m_text->Cut();
return;
case 'U':
m_text->SetSelection(0, m_text->GetInsertionPoint());
m_text->Cut();
return;
case 'Y':
m_text->Paste();
return;
}
}
switch (event.m_keyCode) {
case WXK_RETURN:
case WXK_NUMPAD_ENTER:
{
wxString s = m_text->GetValue().Trim();
if (!s.IsEmpty())
OnInputLine(s);
m_text->Clear();
}
break;
// to process WXK_TAB, you need to uncomment wxTE_PROCESS_TAB
//case WXK_TAB:
// Navigate();
// break;
case WXK_UP:
case WXK_NUMPAD_UP:
HistoryMove(-1, true);
break;
case WXK_DOWN:
case WXK_NUMPAD_DOWN:
HistoryMove(+1, true);
break;
case WXK_PAGEUP:
case WXK_NUMPAD_PAGEUP:
HistoryMove(0, false);
break;
case WXK_PAGEDOWN:
case WXK_NUMPAD_PAGEDOWN:
HistoryMove(-1, false);
break;
default:
event.Skip();
}
}
void InputLine::OnKeyDownAtSpinButton(wxKeyEvent& event)
{
RedirectKeyPress(event);
event.Skip();
}
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