Upstream tarball 20080304

[amule.git] / src / MuleListCtrl.cpp

//
// This file is part of the aMule Project.
//
// Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
// Copyright (c) 2002 Merkur ( devs@emule-project.net / http://www.emule-project.net )
//
// Any parts of this program derived from the xMule, lMule or eMule project,
// or contributed by third-party developers are copyrighted by their
// respective authors.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
//

#include <wx/menu.h>                    // Needed for wxMenu
#include <wx/fileconf.h>                // Needed for wxConfig
#include <wx/tokenzr.h>                 // Needed for wxStringTokenizer
#include <wx/imaglist.h>                // Needed for wxImageList

#include <common/MuleDebug.h>                   // Needed for MULE_VALIDATE_
#include <common/StringFunctions.h>             // Needed for StrToLong

#include <common/MenuIDs.h>

#include "MuleListCtrl.h"               // Interface declarations
#include "GetTickCount.h"               // Needed for GetTickCount()
#include "OtherFunctions.h"


// For arrow-pixmaps
#include "pixmaps/sort_dn.xpm"
#include "pixmaps/sort_up.xpm"
#include "pixmaps/sort_dnx2.xpm"
#include "pixmaps/sort_upx2.xpm"


// Global constants
#ifdef __WXGTK__
        const int COL_SIZE_MIN = 10;
#elif defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXCOCOA__)
        const int COL_SIZE_MIN = 0;
#else
        #error Need to define COL_SIZE_MIN for your OS
#endif


BEGIN_EVENT_TABLE(CMuleListCtrl, MuleExtern::wxGenericListCtrl)
        EVT_LIST_COL_CLICK( -1,                 CMuleListCtrl::OnColumnLClick)
        EVT_LIST_COL_RIGHT_CLICK( -1,   CMuleListCtrl::OnColumnRClick)
        EVT_LIST_ITEM_SELECTED(-1,              CMuleListCtrl::OnItemSelected)
        EVT_LIST_DELETE_ITEM(-1,                CMuleListCtrl::OnItemDeleted)
        EVT_LIST_DELETE_ALL_ITEMS(-1,   CMuleListCtrl::OnAllItemsDeleted)
        EVT_CHAR(                                               CMuleListCtrl::OnChar)
        EVT_MENU_RANGE(MP_LISTCOL_1, MP_LISTCOL_15, CMuleListCtrl::OnMenuSelected)
        EVT_MOUSEWHEEL(CMuleListCtrl::OnMouseWheel)
END_EVENT_TABLE()


//! Shared list of arrow-pixmaps
static wxImageList imgList(16, 16, true, 0);


CMuleListCtrl::CMuleListCtrl(wxWindow *parent, wxWindowID winid, const wxPoint& pos, const wxSize& size, long style, const wxValidator& validator, const wxString& name)
        : MuleExtern::wxGenericListCtrl(parent, winid, pos, size, style, validator, name)
{
        m_sort_func = NULL;
        m_tts_time = 0;
        m_tts_item = -1;

        if (imgList.GetImageCount() == 0) {
                imgList.Add(wxBitmap(sort_dn_xpm));
                imgList.Add(wxBitmap(sort_up_xpm));
                imgList.Add(wxBitmap(sort_dnx2_xpm));
                imgList.Add(wxBitmap(sort_upx2_xpm));
        }

        // Default sort-order is to sort by the first column (asc).
        m_sort_orders.push_back(CColPair(0, 0));
        
        SetImageList(&imgList, wxIMAGE_LIST_SMALL);
}


CMuleListCtrl::~CMuleListCtrl()
{
        if (!m_name.IsEmpty()) {
                SaveSettings();
        }
}


void CMuleListCtrl::SaveSettings()
{
        wxCHECK_RET(!m_name.IsEmpty(), wxT("Cannot save settings for unnamed list"));
        
        wxConfigBase* cfg = wxConfigBase::Get();

        // Save sorting, column and order
        wxString sortOrder;
        for (CSortingList::iterator it = m_sort_orders.begin(); it != m_sort_orders.end(); ++it) {
                sortOrder += wxString::Format(wxT("%u %u, "), it->first, it->second);
        }
        
        cfg->Write(wxT("/eMule/TableOrdering") + m_name, sortOrder);

        // Save column widths. ATM this is also used to signify hidden columns.
        wxString buffer;
        for ( int i = 0; i < GetColumnCount(); ++i ) {
                if ( i ) buffer << wxT(",");

                buffer << GetColumnWidth(i);
        }

        cfg->Write( wxT("/eMule/TableWidths") +m_name, buffer );
}       


void CMuleListCtrl::LoadSettings()
{
        wxCHECK_RET(!m_name.IsEmpty(), wxT("Cannot load settings for unnamed list"));

        wxConfigBase* cfg = wxConfigBase::Get();

        // Load sort order (including sort-column)
        m_sort_orders.clear();
        wxString setting = cfg->Read(wxT("/eMule/TableOrdering") + m_name, wxEmptyString);
        
        // Prevent sorting from occuring when calling SetSorting
        MuleListCtrlCompare sortFunc = m_sort_func;
        m_sort_func = NULL;
        
        wxStringTokenizer tokens(setting, wxT(","));
        while (tokens.HasMoreTokens()) {
                wxString token = tokens.GetNextToken();

                unsigned long column = 0, order = 0;

                if (token.BeforeFirst(wxT(' ')).Strip(wxString::both).ToULong(&column)) {
                        if (token.AfterFirst(wxT(' ')).Strip(wxString::both).ToULong(&order)) {
                                // Sanity checking, to avoid asserting if column count changes.
                                if (column < (unsigned)GetColumnCount()) {
                                        // Sanity checking, to avoid asserting if data-format changes.
                                        if ((order & ~SORTING_MASK) == 0) {
                                                // SetSorting will take care of duplicate entries
                                                SetSorting(column, order);
                                        }
                                }
                        }
                }
        }
        
        // Must have at least one sort-order specified
        if (m_sort_orders.empty()) {
                m_sort_orders.push_back(CColPair(0, 0));
        }

        // Re-enable sorting and resort the contents (if any).
        m_sort_func = sortFunc;
        SortList();     

        // Set the column widths
        wxString buffer;
        if (cfg->Read( wxT("/eMule/TableWidths") + m_name, &buffer, wxEmptyString)) {
                int counter = 0;
                
                wxStringTokenizer tokenizer( buffer, wxT(",") );
                while (tokenizer.HasMoreTokens() && (counter < GetColumnCount())) {
                        SetColumnWidth(counter++, StrToLong( tokenizer.GetNextToken()));
                }
        }
}


long CMuleListCtrl::GetInsertPos(wxUIntPtr data)
{
        // Find the best place to position the item through a binary search
        int Min = 0;
        int Max = GetItemCount();

        // Only do this if there are any items and a sorter function
        if (Max && m_sort_func) {
                // This search will narrow down the best place to position the new
                // item. The result will be the item after that position, which is
                // the format expected by the insertion function.
                do {
                        int cur_pos = ( Max - Min ) / 2 + Min;
                        int cmp = CompareItems(data, GetItemData(cur_pos));
                        
                        // Value is lesser than the one at the current pos
                        if ( cmp < 0 ) {
                                Max = cur_pos;
                        } else {
                                Min = cur_pos + 1;
                        }                       
                } while ((Min != Max));
        }

        return Max;
}



int CMuleListCtrl::CompareItems(wxUIntPtr item1, wxUIntPtr item2)
{
        CSortingList::const_iterator it = m_sort_orders.begin();
        for (; it != m_sort_orders.end(); ++it) {
                int result = m_sort_func(item1, item2, it->first | it->second);
                if (result != 0) {
                        return result;
                }
        }

        // Ensure that different items are never considered equal.
        return CmpAny(item1, item2);
}


MuleListCtrlCompare     g_sort_func = NULL;
CMuleListCtrl*          g_sort_list = NULL;


int CMuleListCtrl::SortProc(wxUIntPtr item1, wxUIntPtr item2, long)
{
        const CSortingList& orders = g_sort_list->m_sort_orders;
        
        CSortingList::const_iterator it = orders.begin();
        for (; it != orders.end(); ++it) {
                int result = g_sort_func(item1, item2, it->first | it->second);
                if (result != 0) {
                        return result;
                }
        }

        // Ensure that different items are never considered equal.
        return CmpAny(item1, item2);
}


void CMuleListCtrl::SortList()
{
        wxCHECK_RET(g_sort_func == NULL, wxT("Sort-function already set"));
        wxCHECK_RET(g_sort_list == NULL, wxT("Sort-list already set"));
        
        if (m_sort_func && GetColumnCount()) {
                // Positions are likely to be invalid after sorting.
                ResetTTS();
                
                g_sort_func = m_sort_func;
                g_sort_list = this;
                
                SortItems(SortProc, 0);

                g_sort_func = NULL;
                g_sort_list = NULL;
        }
}


CMuleListCtrl::ItemDataList CMuleListCtrl::GetSelectedItems() const
{
        // Create the initial vector with as many items as are selected
        ItemDataList list( GetSelectedItemCount() );
        
        // Current item being located
        unsigned int current = 0;
        
        long pos = GetNextItem( -1, wxLIST_NEXT_ALL, wxLIST_STATE_SELECTED );
        while ( pos != -1 ) {
                wxASSERT( current < list.size() );
        
                list[ current++ ] = GetItemData( pos );

                pos = GetNextItem( pos, wxLIST_NEXT_ALL, wxLIST_STATE_SELECTED );
        }
        
        return list;
}


void CMuleListCtrl::OnColumnRClick(wxListEvent& evt)
{
        wxMenu menu;
        wxListItem item;
        
        for ( int i = 0; i < GetColumnCount() && i < 15; ++i) {
                GetColumn(i, item);

                menu.AppendCheckItem(i + MP_LISTCOL_1, item.GetText() );
                menu.Check( i + MP_LISTCOL_1, GetColumnWidth(i) > COL_SIZE_MIN );
        }

        PopupMenu(&menu, evt.GetPoint());
}


void CMuleListCtrl::OnMenuSelected( wxCommandEvent& evt )
{
        int col = evt.GetId() - MP_LISTCOL_1;

        if (GetColumnWidth(col) > COL_SIZE_MIN) {
                SetColumnWidth(col, 0);
        } else {
                SetColumnWidth(col, wxLIST_AUTOSIZE);
        }       
}


void CMuleListCtrl::OnColumnLClick(wxListEvent& evt)
{
        // Stop if no sorter-function has been defined
        if (!m_sort_func) {
                return;
        } else if (evt.GetColumn() == -1) {
                // This happens if a user clicks past the last column header.
                return;
        }

        // Get the currently focused item
        long pos = GetNextItem( -1, wxLIST_NEXT_ALL, wxLIST_STATE_FOCUSED );
        wxUIntPtr item = 0;
        if (pos != -1) {
                item = GetItemData(pos);
        }


        unsigned sort_order = 0;
        if (m_sort_orders.front().first == (unsigned)evt.GetColumn()) {
                // Same column as before, flip the sort-order
                sort_order = m_sort_orders.front().second;
                
                if (sort_order & SORT_DES) {
                        if (AltSortAllowed(evt.GetColumn())) {
                                sort_order = (~sort_order) & SORT_ALT;
                        } else {
                                sort_order = 0;
                        }
                } else {
                        sort_order = SORT_DES | (sort_order & SORT_ALT);
                }

                m_sort_orders.pop_front();
        } else {
                // Check if the column has already been set
                CSortingList::iterator it = m_sort_orders.begin();
                for (; it != m_sort_orders.end(); ++it) {
                        if ((unsigned)evt.GetColumn() == it->first) {
                                sort_order = it->second;
                                break;
                        }
                }       
        }
        
        SetSorting(evt.GetColumn(), sort_order);
        
        
        // Set focus on item if any was focused
        if (item != 0) {
                long it_pos = FindItem(-1, item);
                if (it_pos != -1) {
                        SetItemState(it_pos,wxLIST_STATE_FOCUSED, wxLIST_STATE_FOCUSED | wxLIST_STATE_SELECTED);
                }
        }
}


void CMuleListCtrl::ClearSelection() 
{
        if (GetSelectedItemCount()) {
                long index = GetNextItem(-1, wxLIST_NEXT_ALL, wxLIST_STATE_SELECTED);
                while (index != -1) {
                        SetItemState(index, 0, wxLIST_STATE_SELECTED);
                        index = GetNextItem(index, wxLIST_NEXT_ALL, wxLIST_STATE_SELECTED);
                }
        }
}


void CMuleListCtrl::SetTableName(const wxString& name)
{
        m_name = name;
}


unsigned CMuleListCtrl::GetSortColumn() const
{
        return m_sort_orders.front().first;
}


unsigned CMuleListCtrl::GetSortOrder() const
{
        return m_sort_orders.front().second;
}


void CMuleListCtrl::SetSortFunc(MuleListCtrlCompare func)
{
        m_sort_func = func;
}


bool CMuleListCtrl::AltSortAllowed(unsigned WXUNUSED(column)) const
{
        return false;
}


void CMuleListCtrl::SetSorting(unsigned column, unsigned order)
{
        MULE_VALIDATE_PARAMS(column < (unsigned)GetColumnCount(), wxT("Invalid column to sort by."));
        MULE_VALIDATE_PARAMS(!(order & ~SORTING_MASK), wxT("Sorting order contains invalid data."));
        
        if (!m_sort_orders.empty()) {
                SetColumnImage(m_sort_orders.front().first, -1);
        
                CSortingList::iterator it = m_sort_orders.begin();
                for (; it != m_sort_orders.end(); ++it) {
                        if (it->first == column) {
                                m_sort_orders.erase(it);
                                break;
                        }
                }
        }

        m_sort_orders.push_front(CColPair(column, order));      
        
        if (order & SORT_DES) {
                SetColumnImage(column, (order & SORT_ALT) ? 2 : 0);
        } else {
                SetColumnImage(column, (order & SORT_ALT) ? 3 : 1);
        }

        SortList();
}


bool CMuleListCtrl::IsItemSorted(long item)
{
        wxCHECK_MSG(m_sort_func, true, wxT("No sort function specified!"));
        wxCHECK_MSG((item >= 0) && (item < GetItemCount()), true, wxT("Invalid item"));
        
        bool sorted = true;
        wxUIntPtr data = GetItemData(item);

        // Check that the item before the current item is smaller (or equal)
        if (item > 0) {
                sorted &= (CompareItems(GetItemData(item - 1), data) <= 0);
        }

        // Check that the item after the current item is greater (or equal)
        if (sorted && (item < GetItemCount() - 1)) {
                sorted &= (CompareItems(GetItemData(item + 1), data) >= 0);
        }

        return sorted;
}


void CMuleListCtrl::OnMouseWheel(wxMouseEvent &event)
{
        // This enables scrolling with the mouse wheel
        event.Skip();
}


void CMuleListCtrl::SetColumnImage(unsigned col, int image)
{
    wxListItem item;
    item.SetMask(wxLIST_MASK_IMAGE);
        item.SetImage(image);
    SetColumn(col, item);       
}


long CMuleListCtrl::CheckSelection(wxMouseEvent& event)
{
        int flags = 0;
        wxListEvent evt;
        evt.m_itemIndex = HitTest(event.GetPosition(), flags);

        return CheckSelection(evt);
}


long CMuleListCtrl::CheckSelection(wxListEvent& event)
{
        long item = event.GetIndex();
        
        // Check if clicked item is selected. If not, unselect all and select it.
        if ((item != -1) && !GetItemState(item, wxLIST_STATE_SELECTED)) {
                ClearSelection();
                
                SetItemState(item, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED);
        }
        
        return item;
}


wxString CMuleListCtrl::GetTTSText(unsigned item) const
{
        MULE_VALIDATE_PARAMS(item < (unsigned)GetItemCount(), wxT("Invalid row."));
        MULE_VALIDATE_STATE((GetWindowStyle() & wxLC_OWNERDRAW) == 0,
                wxT("GetTTSText must be overwritten for owner-drawn lists."));

        return GetItemText(item);
}


void CMuleListCtrl::OnChar(wxKeyEvent& evt)
{
        wxChar key = evt.GetKeyCode();
        if (key == 0) {
                // We prefer GetKeyCode() to GetUnicodeKey(), in order to work
                // around a bug in the GetUnicodeKey(), that causes values to
                // be returned untranslated. This means for instance, that if
                // shift and '1' is pressed, the result is '1' rather than '!'
                // (as it should be on my keyboard). This has been reported:
                // http://sourceforge.net/tracker/index.php?func=detail&aid=1864810&group_id=9863&atid=109863
                key = evt.GetUnicodeKey();
        } else if (key >= WXK_START) {
                // wxKeycodes are ignored, as they signify events such as the 'home'
                // button. Unicoded chars are not checke as there is an overlap valid
                // chars and the wx keycodes.
                evt.Skip();
                return;
        }
        
        // We wish to avoid handling shortcuts, with the exception of 'select-all'.
        if (evt.AltDown() || evt.ControlDown() || evt.MetaDown()) {
                if (evt.CmdDown() && (evt.GetKeyCode() == 0x01)) {
                        // Ctrl+a (Command+a on Mac) was pressed, select all items
                        for (int i = 0; i < GetItemCount(); ++i) {
                                SetItemState(i, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED);
                        }
                }
                
                evt.Skip();
                return;
        } else if (m_tts_time + 1500u < GetTickCount()) {
                m_tts_text.Clear();
        }
        
        m_tts_time = GetTickCount();
        m_tts_text.Append(wxTolower(key));

        // May happen if the subclass does not forward deletion events.
        if (m_tts_item >= GetItemCount()) {
                wxASSERT(0);
                m_tts_item = -1;
        }
        
        unsigned next = (m_tts_item == -1) ? 0 : m_tts_item;
        for (unsigned i = 0, count = GetItemCount(); i < count; ++i) {
                wxString text = GetTTSText((next + i) % count).MakeLower();

                if (text.StartsWith(m_tts_text)) {
                        ClearSelection();
                        
                        m_tts_item = (next + i) % count;
                        SetItemState(m_tts_item, wxLIST_STATE_FOCUSED | wxLIST_STATE_SELECTED, 
                                        wxLIST_STATE_FOCUSED | wxLIST_STATE_SELECTED);
                        EnsureVisible(m_tts_item);

                        return;
                }
        }
        
        if (m_tts_item != -1) {
                // Crop the string so that it matches the old item (avoid typos).
                wxString text = GetTTSText(m_tts_item).MakeLower();
                
                // If the last key didn't result in a hit, then we skip the event.
                if (!text.StartsWith(m_tts_text)) {
                        if ((m_tts_text.Length() == 2) && (m_tts_text[0] == m_tts_text[1])) {
                                // Special case, single-char, repeated. This allows toggeling
                                // between items starting with a specific letter.
                                m_tts_text.Clear();
                                // Increment, so the next will be selected (or wrap around).
                                m_tts_item++;
                                OnChar(evt);
                        } else {
                                m_tts_text.RemoveLast();
                                evt.Skip(true);
                        }
                }
        } else {
                evt.Skip(true);
        }
}


void CMuleListCtrl::OnItemSelected(wxListEvent& evt)
{
        // We reset the current TTS session if the user manually changes the selection
        if (m_tts_item != evt.GetIndex()) {
                ResetTTS();

                // The item is changed so that the next TTS starts from the selected item.
                m_tts_item = evt.GetIndex();
        }

        evt.Skip();
}


void CMuleListCtrl::OnItemDeleted(wxListEvent& evt)
{       
        if (evt.GetIndex() <= m_tts_item) {
                m_tts_item--;
        }

        evt.Skip();
}


void CMuleListCtrl::OnAllItemsDeleted(wxListEvent& evt)
{
        ResetTTS();
        
        evt.Skip();
}


void CMuleListCtrl::ResetTTS()
{
        m_tts_item = -1;
        m_tts_time =  0;
}
// File_checked_for_headers