src/html/m_list.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/html/m_list.cpp
   3 // Purpose:     wxHtml module for lists
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #include "wx/wxprec.h"
  11
  12 #ifdef __BORLANDC__
  13     #pragma hdrstop
  14 #endif
  15
  16 #if wxUSE_HTML && wxUSE_STREAMS
  17
  18 #ifndef WXPRECOMP
  19     #include "wx/brush.h"
  20     #include "wx/dc.h"
  21 #endif
  22
  23 #include "wx/html/forcelnk.h"
  24 #include "wx/html/m_templ.h"
  25
  26 #include "wx/html/htmlcell.h"
  27
  28 FORCE_LINK_ME(m_list)
  29
  30
  31 //-----------------------------------------------------------------------------
  32 // wxHtmlListmarkCell
  33 //-----------------------------------------------------------------------------
  34
  35 class wxHtmlListmarkCell : public wxHtmlCell
  36 {
  37     private:
  38         wxBrush m_Brush;
  39     public:
  40         wxHtmlListmarkCell(wxDC *dc, const wxColour& clr);
  41         void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
  42                   wxHtmlRenderingInfo& info);
  43
  44     DECLARE_NO_COPY_CLASS(wxHtmlListmarkCell)
  45 };
  46
  47 wxHtmlListmarkCell::wxHtmlListmarkCell(wxDC* dc, const wxColour& clr) : wxHtmlCell(), m_Brush(clr, wxSOLID)
  48 {
  49     m_Width =  dc->GetCharHeight();
  50     m_Height = dc->GetCharHeight();
  51     // bottom of list mark is lined with bottom of letters in next cell
  52     m_Descent = m_Height / 3;
  53 }
  54
  55
  56
  57 void wxHtmlListmarkCell::Draw(wxDC& dc, int x, int y,
  58                               int WXUNUSED(view_y1), int WXUNUSED(view_y2),
  59                               wxHtmlRenderingInfo& WXUNUSED(info))
  60 {
  61     dc.SetBrush(m_Brush);
  62     dc.DrawEllipse(x + m_PosX + m_Width / 3, y + m_PosY + m_Height / 3,
  63                    (m_Width / 3), (m_Width / 3));
  64 }
  65
  66 //-----------------------------------------------------------------------------
  67 // wxHtmlListCell
  68 //-----------------------------------------------------------------------------
  69
  70 struct wxHtmlListItemStruct
  71 {
  72     wxHtmlContainerCell *mark;
  73     wxHtmlContainerCell *cont;
  74     int minWidth;
  75     int maxWidth;
  76 };
  77
  78 class wxHtmlListCell : public wxHtmlContainerCell
  79 {
  80     private:
  81         wxBrush m_Brush;
  82
  83         int m_NumRows;
  84         wxHtmlListItemStruct *m_RowInfo;
  85         void ReallocRows(int rows);
  86         void ComputeMinMaxWidths();
  87         int ComputeMaxBase(wxHtmlCell *cell);
  88         int m_ListmarkWidth;
  89
  90     public:
  91         wxHtmlListCell(wxHtmlContainerCell *parent);
  92         virtual ~wxHtmlListCell();
  93         void AddRow(wxHtmlContainerCell *mark, wxHtmlContainerCell *cont);
  94         virtual void Layout(int w);
  95
  96     DECLARE_NO_COPY_CLASS(wxHtmlListCell)
  97 };
  98
  99 wxHtmlListCell::wxHtmlListCell(wxHtmlContainerCell *parent) : wxHtmlContainerCell(parent)
 100 {
 101     m_NumRows = 0;
 102     m_RowInfo = 0;
 103     m_ListmarkWidth = 0;
 104 }
 105
 106 wxHtmlListCell::~wxHtmlListCell()
 107 {
 108     if (m_RowInfo) free(m_RowInfo);
 109 }
 110
 111 int wxHtmlListCell::ComputeMaxBase(wxHtmlCell *cell)
 112 {
 113     if(!cell)
 114         return 0;
 115
 116     wxHtmlCell *child = cell->GetFirstChild();
 117
 118     while(child)
 119     {
 120         int base = ComputeMaxBase( child );
 121         if ( base > 0 ) return base + child->GetPosY();
 122         child = child->GetNext();
 123     }
 124
 125     return cell->GetHeight() - cell->GetDescent();
 126 }
 127
 128 void wxHtmlListCell::Layout(int w)
 129 {
 130     wxHtmlCell::Layout(w);
 131
 132     ComputeMinMaxWidths();
 133     m_Width = wxMax(m_Width, wxMin(w, GetMaxTotalWidth()));
 134
 135     int s_width = m_Width - m_IndentLeft;
 136
 137     int vpos = 0;
 138     for (int r = 0; r < m_NumRows; r++)
 139     {
 140         // do layout first time to layout contents and adjust pos
 141         m_RowInfo[r].mark->Layout(m_ListmarkWidth);
 142         m_RowInfo[r].cont->Layout(s_width - m_ListmarkWidth);
 143
 144         const int base_mark = ComputeMaxBase( m_RowInfo[r].mark );
 145         const int base_cont = ComputeMaxBase( m_RowInfo[r].cont );
 146         const int adjust_mark = vpos + wxMax(base_cont-base_mark,0);
 147         const int adjust_cont = vpos + wxMax(base_mark-base_cont,0);
 148
 149         m_RowInfo[r].mark->SetPos(m_IndentLeft, adjust_mark);
 150         m_RowInfo[r].cont->SetPos(m_IndentLeft + m_ListmarkWidth, adjust_cont);
 151
 152         vpos = wxMax(adjust_mark + m_RowInfo[r].mark->GetHeight(),
 153                      adjust_cont + m_RowInfo[r].cont->GetHeight());
 154     }
 155     m_Height = vpos;
 156 }
 157
 158 void wxHtmlListCell::AddRow(wxHtmlContainerCell *mark, wxHtmlContainerCell *cont)
 159 {
 160     ReallocRows(++m_NumRows);
 161     m_RowInfo[m_NumRows - 1].mark = mark;
 162     m_RowInfo[m_NumRows - 1].cont = cont;
 163 }
 164
 165 void wxHtmlListCell::ReallocRows(int rows)
 166 {
 167     m_RowInfo = (wxHtmlListItemStruct*) realloc(m_RowInfo, sizeof(wxHtmlListItemStruct) * rows);
 168     m_RowInfo[rows - 1].mark = NULL;
 169     m_RowInfo[rows - 1].cont = NULL;
 170     m_RowInfo[rows - 1].minWidth = 0;
 171     m_RowInfo[rows - 1].maxWidth = 0;
 172
 173     m_NumRows = rows;
 174 }
 175
 176 void wxHtmlListCell::ComputeMinMaxWidths()
 177 {
 178     if (m_NumRows == 0) return;
 179
 180     m_MaxTotalWidth = 0;
 181     m_Width = 0;
 182
 183     for (int r = 0; r < m_NumRows; r++)
 184     {
 185         wxHtmlListItemStruct& row = m_RowInfo[r];
 186         row.mark->Layout(1);
 187         row.cont->Layout(1);
 188         int maxWidth = row.cont->GetMaxTotalWidth();
 189         int width = row.cont->GetWidth();
 190         if (row.mark->GetWidth() > m_ListmarkWidth)
 191             m_ListmarkWidth = row.mark->GetWidth();
 192         if (maxWidth > m_MaxTotalWidth)
 193             m_MaxTotalWidth = maxWidth;
 194         if (width > m_Width)
 195             m_Width = width;
 196     }
 197     m_Width += m_ListmarkWidth + m_IndentLeft;
 198     m_MaxTotalWidth += m_ListmarkWidth + m_IndentLeft;
 199 }
 200
 201 //-----------------------------------------------------------------------------
 202 // wxHtmlListcontentCell
 203 //-----------------------------------------------------------------------------
 204
 205 class wxHtmlListcontentCell : public wxHtmlContainerCell
 206 {
 207 public:
 208     wxHtmlListcontentCell(wxHtmlContainerCell *p) : wxHtmlContainerCell(p) {}
 209     virtual void Layout(int w) {
 210         // Reset top indentation, fixes <li><p>
 211         SetIndent(0, wxHTML_INDENT_TOP);
 212         wxHtmlContainerCell::Layout(w);
 213     }
 214 };
 215
 216 //-----------------------------------------------------------------------------
 217 // The list handler:
 218 //-----------------------------------------------------------------------------
 219
 220
 221 TAG_HANDLER_BEGIN(OLULLI, "OL,UL,LI")
 222
 223     TAG_HANDLER_VARS
 224         wxHtmlListCell *m_List;
 225         int m_Numbering;
 226                 // this is number of actual item of list or 0 for dots
 227
 228     TAG_HANDLER_CONSTR(OLULLI)
 229     {
 230         m_List = NULL;
 231         m_Numbering = 0;
 232     }
 233
 234     TAG_HANDLER_PROC(tag)
 235     {
 236         wxHtmlContainerCell *c;
 237
 238         // List Item:
 239         if (m_List && tag.GetName() == wxT("LI"))
 240         {
 241             c = m_WParser->SetContainer(new wxHtmlContainerCell(m_List));
 242             c->SetAlignVer(wxHTML_ALIGN_TOP);
 243
 244             wxHtmlContainerCell *mark = c;
 245             c->SetWidthFloat(2 * m_WParser->GetCharWidth(), wxHTML_UNITS_PIXELS);
 246             if (m_Numbering == 0)
 247             {
 248                 // Centering gives more space after the bullet
 249                 c->SetAlignHor(wxHTML_ALIGN_CENTER);
 250                 c->InsertCell(new wxHtmlListmarkCell(m_WParser->GetDC(), m_WParser->GetActualColor()));
 251             }
 252             else
 253             {
 254                 c->SetAlignHor(wxHTML_ALIGN_RIGHT);
 255                 wxString markStr;
 256                 markStr.Printf(wxT("%i. "), m_Numbering);
 257                 c->InsertCell(new wxHtmlWordCell(markStr, *(m_WParser->GetDC())));
 258             }
 259             m_WParser->CloseContainer();
 260
 261             c = m_WParser->OpenContainer();
 262
 263             m_List->AddRow(mark, c);
 264             c = m_WParser->OpenContainer();
 265             m_WParser->SetContainer(new wxHtmlListcontentCell(c));
 266
 267             if (m_Numbering != 0) m_Numbering++;
 268         }
 269
 270         // Begin of List (not-numbered): "UL", "OL"
 271         else if (tag.GetName() == wxT("UL") || tag.GetName() == wxT("OL"))
 272         {
 273             int oldnum = m_Numbering;
 274
 275             if (tag.GetName() == wxT("UL")) m_Numbering = 0;
 276             else m_Numbering = 1;
 277
 278             wxHtmlContainerCell *oldcont;
 279             oldcont = c = m_WParser->OpenContainer();
 280
 281             wxHtmlListCell *oldList = m_List;
 282             m_List = new wxHtmlListCell(c);
 283             m_List->SetIndent(2 * m_WParser->GetCharWidth(), wxHTML_INDENT_LEFT);
 284
 285             ParseInner(tag);
 286
 287             m_WParser->SetContainer(oldcont);
 288             m_WParser->CloseContainer();
 289
 290             m_Numbering = oldnum;
 291             m_List = oldList;
 292             return true;
 293         }
 294         return false;
 295
 296     }
 297
 298 TAG_HANDLER_END(OLULLI)
 299
 300
 301 TAGS_MODULE_BEGIN(List)
 302
 303     TAGS_MODULE_ADD(OLULLI)
 304
 305 TAGS_MODULE_END(List)
 306
 307 #endif