pager.cpp

ncbi源码

CNCBINode* CPager::GetPageInfo(void) const
{
    if (m_ItemCount <= m_PageSize) {
        return 0;
    }
    int lastPage = (m_ItemCount - 1) / m_PageSize;
    return new CHTMLPlainText(
        "Page " + NStr::IntToString(m_DisplayPage + 1) +
        " of " + NStr::IntToString(lastPage + 1));
}

CNCBINode* CPager::GetItemInfo(void) const
{
    CHTML_div* node = new CHTML_div;
    node->SetClass("medium2");
    
    if (m_ItemCount == 0) {
        node->AppendChild(new CHTMLPlainText("0 items found"));
    } else {
        int firstItem = m_DisplayPage * m_PageSize + 1;
        int endItem = min((m_DisplayPage + 1) * m_PageSize, m_ItemCount);
        if (firstItem != endItem) {
            node->AppendChild(new CHTMLPlainText("Items " +
                                                 NStr::IntToString(firstItem)
                                                 + "-" +
                                                 NStr::IntToString(endItem)));
        } else {
            node->AppendChild(new CHTMLPlainText("Item " +
                                                 NStr::IntToString(firstItem))
                              );
        }
        node->AppendChild(new CHTMLPlainText(" of " +
                                             NStr::IntToString(m_ItemCount)));
    }
    return node;
}


CNCBINode* CPager::GetPagerView(const string& imgDir,
                                const int imgX, const int imgY,
                                const string& js_suffix /*kEmptyStr*/) const
{
    if (m_ItemCount <= m_PageSize) {
        return 0;
    }
    switch (m_view) {
    case eButtons:
        return new CPagerViewButtons(*this, js_suffix);
    default:
        break;
    }
    // Default old behavor
    return new CPagerView(*this, imgDir, imgX, imgY);
}


CPagerView::CPagerView(const CPager& pager, const string& imgDir,
                       const int imgX, const int imgY)
    : m_ImagesDir(imgDir), m_ImgSizeX(imgX), m_ImgSizeY(imgY), m_Pager(pager)
{
    return;
}


void CPagerView::AddImageString(CNCBINode* node, int number,
                                const string& prefix, const string& suffix)
{
    string s = NStr::IntToString(number + 1);
    string name = CPager::KParam_Page + s;
    CHTML_image* img;

    for ( size_t i = 0; i < s.size(); ++i ) {
        img = new CHTML_image(name, m_ImagesDir + prefix + s[i] + suffix, 0);
        img->SetAttribute("Alt", name);
        if ( m_ImgSizeX )
            img->SetWidth( m_ImgSizeX );
        if ( m_ImgSizeY )
            img->SetHeight( m_ImgSizeY );
        node->AppendChild( img );
    }
}


void CPagerView::AddInactiveImageString(CNCBINode* node, int number,
                                        const string& prefix,
                                        const string& suffix)
{
    string s = NStr::IntToString(number + 1);
    CHTML_img* img;

    for ( size_t i = 0; i < s.size(); ++i ) {
        img = new CHTML_img(m_ImagesDir + prefix + s[i] + suffix);
        img->SetAttribute("Alt", s);
        if( m_ImgSizeX )
            img->SetWidth( m_ImgSizeX );
        if( m_ImgSizeY )
            img->SetHeight( m_ImgSizeY );
        node->AppendChild( img );
    }
}


void CPagerView::CreateSubNodes()
{
    int column         = 0;
    int pageSize       = m_Pager.m_PageSize;
    int blockSize      = m_Pager.m_PageBlockSize;

    int currentPage    = m_Pager.m_DisplayPage;
    int itemCount      = m_Pager.m_ItemCount;

    int firstBlockPage = currentPage - currentPage % blockSize;
    int lastPage       = max(0, (itemCount + pageSize - 1) / pageSize - 1);
    int lastBlockPage  = min(firstBlockPage + blockSize - 1, lastPage);

    if (firstBlockPage > 0) {
        CHTML_image* img = new CHTML_image(CPager::KParam_PreviousPages,
                                           m_ImagesDir + "prev.gif", 0);
        img->SetAttribute("Alt", CPager::KParam_PreviousPages);
        if ( m_ImgSizeX )
            img->SetWidth( m_ImgSizeX );
        if ( m_ImgSizeY )
            img->SetHeight( m_ImgSizeY );
        InsertAt(0, column++, img);
    }

    for (int i = firstBlockPage; i <= lastBlockPage ; ++i) {
        if (i == currentPage) {
            // current link
            AddImageString(Cell(0, column++), i, "black_", ".gif");
        }
        else {
            // normal link
            AddImageString(Cell(0, column++), i, "", ".gif");
        }
    }

    if (lastPage != lastBlockPage) {
        CHTML_image* img = new CHTML_image(CPager::KParam_NextPages,
                                           m_ImagesDir + "next.gif", 0);
        img->SetAttribute("Alt", CPager::KParam_NextPages);
        if ( m_ImgSizeX )
            img->SetWidth( m_ImgSizeX );
        if ( m_ImgSizeY )
            img->SetHeight( m_ImgSizeY );
        InsertAt(0, column++, img);
    }
}


CPagerViewButtons::CPagerViewButtons(const CPager& pager, const string& js_suffix)
    : m_Pager(pager), m_jssuffix(js_suffix)
{
}

void CPagerViewButtons::CreateSubNodes()
{
    int column      = 0;
    int pageSize    = m_Pager.m_PageSize;
    int currentPage = m_Pager.m_DisplayPage;
    int itemCount   = m_Pager.m_ItemCount;
    int lastPage    = max(0, (itemCount + pageSize - 1) / pageSize - 1);

    if (currentPage > 0) {
        CHTML_a* prev = new CHTML_a("javascript:var frm = " \
                                    "document.frmQueryBox; " \
									"frm.inputpage.value=" +
                                    NStr::IntToString(currentPage) + 
                                    "; Go('Pager');", "Previous");
        prev->SetClass("dblinks");
        InsertAt(0, column, prev);
        InsertAt(0, column++, new CHTML_nbsp);
    }
        
    CHTML_input* butt = new CHTML_input("BUTTON", "GoToPage");
    butt->SetClass("dblinks");
    butt->SetAttribute("value", "Page");
    butt->SetEventHandler(eHTML_EH_Click,
                          "form.cmd.value='';form." +
                          CPager::KParam_InputPage +
                          ".value=form.textpage" + m_jssuffix +
                          ".value;Go('Pager');");
    InsertAt(0, column, butt);
    InsertAt(0, column, new CHTML_nbsp);

    CHTML_input* textpage =  new CHTML_text("textpage" + m_jssuffix, 4,
                                         NStr::IntToString(currentPage + 1));
    textpage->SetClass("dblinks");
    
    string suffix;
    if ( m_jssuffix.empty() ) {
       suffix = "1";
    }
    
    textpage->SetEventHandler(eHTML_EH_Change,
							  "if(form.textpage" + suffix + "){form.textpage"
                              + suffix +".value=" + "this.value}");
    
    textpage->SetEventHandler(eHTML_EH_KeyPress,
                              "form." + CPager::KParam_InputPage +".value=" 
							  "this.value;KeyPress('Pager',event);");
                                         
    InsertAt(0, column++, textpage);

    CHTML_div* div = new CHTML_div;
    div->SetClass("medium2");
    div->AppendChild(new CHTML_nbsp);
    div->AppendChild(new CHTMLPlainText("of"));
    div->AppendChild(new CHTML_nbsp);
    div->AppendChild(new CHTMLPlainText(NStr::IntToString(lastPage + 1)));
    InsertAt(0, column++, div);
    
    // place holder for page num, to explicitly tell about new page num
    InsertAt(0, column++, new CHTML_hidden(CPager::KParam_InputPage +
                                           m_jssuffix, kEmptyStr));
    if (currentPage < lastPage) {
        CHTML_a* next = new CHTML_a("javascript:var frm = " \
                                    "document.frmQueryBox;" \
									"frm.inputpage.value=" +
                                    NStr::IntToString(currentPage + 2) + 
                                    ";Go('Pager');", "Next");
        next->SetClass("dblinks");
        InsertAt(0, column, next);
        InsertAt(0, column++, new CHTML_nbsp(2));
    }
}


END_NCBI_SCOPE


/*
 * ===========================================================================
 * $Log: pager.cpp,v $
 * Revision 1000.2  2004/06/01 19:15:56  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.39
 *
 * Revision 1.39  2004/05/17 20:59:50  gorelenk
 * Added include of PCH ncbi_pch.hpp
 *
 * Revision 1.38  2003/11/03 17:03:08  ivanov
 * Some formal code rearrangement. Move log to end.
 *
 * Revision 1.37  2003/10/02 18:24:38  ivanov
 * Get rid of compilation warnings; some formal code rearrangement
 *
 * ===========================================================================
 */