mcs/class/System.Web/System.Web.UI.WebControls/RepeatInfo.cs

   1 /**\r
   2  * Namespace: System.Web.UI.WebControls\r
   3  * Class:     RepeatInfo\r
   4  *\r
   5  * Author:  Gaurav Vaish\r
   6  * Maintainer: gvaish@iitk.ac.in\r
   7  * Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>\r
   8  * Implementation: yes\r
   9  * Status:  100%\r
  10  *\r
  11  * (C) Gaurav Vaish (2002)\r
  12  */\r
  13 \r
  14 using System;\r
  15 using System.Globalization;\r
  16 using System.Web;\r
  17 using System.Web.UI;\r
  18 \r
  19 namespace System.Web.UI.WebControls\r
  20 {\r
  21         public sealed class RepeatInfo\r
  22         {\r
  23                 private bool            outerTableImp;\r
  24                 private int             repeatColumns;\r
  25                 private RepeatDirection repeatDirection;\r
  26                 private RepeatLayout    repeatLayout;\r
  27 \r
  28                 public RepeatInfo()\r
  29                 {\r
  30                         outerTableImp   = false;\r
  31                         repeatColumns   = 0;\r
  32                         repeatDirection = RepeatDirection.Vertical;\r
  33                         repeatLayout    = RepeatLayout.Table;\r
  34                 }\r
  35 \r
  36                 public bool OuterTableImplied\r
  37                 {\r
  38                         get\r
  39                         {\r
  40                                 return outerTableImp;\r
  41                         }\r
  42                         set\r
  43                         {\r
  44                                 outerTableImp = value;\r
  45                         }\r
  46                 }\r
  47 \r
  48                 public int RepeatColumns\r
  49                 {\r
  50                         get\r
  51                         {\r
  52                                 return repeatColumns;\r
  53                         }\r
  54                         set\r
  55                         {\r
  56                                 repeatColumns = value;\r
  57                         }\r
  58                 }\r
  59 \r
  60                 public RepeatDirection RepeatDirection\r
  61                 {\r
  62                         get\r
  63                         {\r
  64                                 return repeatDirection;\r
  65                         }\r
  66                         set\r
  67                         {\r
  68                                 if(!Enum.IsDefined(typeof(RepeatDirection), value))\r
  69                                         throw new ArgumentException();\r
  70                                 repeatDirection = value;\r
  71                         }\r
  72                 }\r
  73 \r
  74                 public RepeatLayout RepeatLayout\r
  75                 {\r
  76                         get\r
  77                         {\r
  78                                 return repeatLayout;\r
  79                         }\r
  80                         set\r
  81                         {\r
  82                                 if(!Enum.IsDefined(typeof(RepeatLayout), value))\r
  83                                         throw new ArgumentException();\r
  84                                 repeatLayout = value;\r
  85                         }\r
  86                 }\r
  87 \r
  88                 public void RenderRepeater(HtmlTextWriter writer, IRepeatInfoUser user, Style controlStyle, WebControl baseControl)\r
  89                 {\r
  90                         if(RepeatDirection == RepeatDirection.Vertical)\r
  91                         {\r
  92                                 DoVerticalRendering(writer, user, controlStyle, baseControl);\r
  93                         } else\r
  94                         {\r
  95                                 DoHorizontalRendering(writer, user, controlStyle, baseControl);\r
  96                         }\r
  97                 }\r
  98 \r
  99                 private void DoVerticalRendering(HtmlTextWriter writer, IRepeatInfoUser user, Style controlStyle, WebControl baseControl)\r
 100                 {\r
 101                         int total = user.RepeatedItemCount;\r
 102                         int colsCount;\r
 103                         int rowsCount;\r
 104                         if(repeatColumns == 0 || repeatColumns==1)\r
 105                         {\r
 106                                 colsCount = 1;\r
 107                                 rowsCount = total;\r
 108                         } else\r
 109                         {\r
 110                                 colsCount = repeatColumns;\r
 111                                 rowsCount = (total + repeatColumns - 1) / repeatColumns;\r
 112                                 if(rowsCount ==0 && total != 0)\r
 113                                 {\r
 114                                         rowsCount = 1;\r
 115                                         colsCount = total;\r
 116                                 }\r
 117                         }\r
 118                         WebControl ctrl = null;\r
 119                         bool isTable = false;\r
 120                         bool hasSeps = user.HasSeparators;\r
 121                         if(!outerTableImp)\r
 122                         {\r
 123                                 if(RepeatLayout == RepeatLayout.Table)\r
 124                                 {\r
 125                                         ctrl = new Table();\r
 126                                         isTable = true;\r
 127                                 } else\r
 128                                 {\r
 129                                         ctrl = new WebControl(HtmlTextWriterTag.Span);\r
 130                                 }\r
 131                         }\r
 132 \r
 133                         if(ctrl != null)\r
 134                         {\r
 135                                 ctrl.ID = baseControl.ClientID;\r
 136                                 ctrl.CopyBaseAttributes(baseControl);\r
 137                                 ctrl.ApplyStyle(controlStyle);\r
 138                                 ctrl.RenderBeginTag(writer);\r
 139                         }\r
 140 \r
 141                         Style itemStyle;\r
 142                         int colSpan = 0;\r
 143                         if(user.HasHeader)\r
 144                         {\r
 145                                 if(isTable)\r
 146                                 {\r
 147                                         writer.RenderBeginTag(HtmlTextWriterTag.Tr);\r
 148                                         if(colsCount != 1)\r
 149                                         {\r
 150                                                 colSpan = colsCount;\r
 151                                                 if(hasSeps)\r
 152                                                         colSpan += colsCount;\r
 153                                                 writer.AddAttribute(HtmlTextWriterAttribute.Colspan, colSpan.ToString(NumberFormatInfo.InvariantInfo));\r
 154                                         }\r
 155                                         itemStyle = user.GetItemStyle(ListItemType.Header, -1);\r
 156                                         if(itemStyle != null)\r
 157                                         {\r
 158                                                 itemStyle.AddAttributesToRender(writer);\r
 159                                         }\r
 160                                         writer.RenderBeginTag(HtmlTextWriterTag.Td);\r
 161                                 }\r
 162                                 user.RenderItem(ListItemType.Header, -1, this, writer);\r
 163                                 if(isTable)\r
 164                                 {\r
 165                                         writer.RenderEndTag();\r
 166                                         writer.RenderEndTag();\r
 167                                 } else\r
 168                                 {\r
 169                                         if(!outerTableImp)\r
 170                                         {\r
 171                                                 writer.WriteFullBeginTag("br");\r
 172                                         }\r
 173                                 }\r
 174                         }\r
 175 \r
 176                         int rowIndex = 0;\r
 177                         int colIndex = 0;\r
 178                         int index = 0;\r
 179                         int diff = colsCount - (rowsCount*colsCount - total);\r
 180                         \r
 181                         while(rowIndex < rowsCount)\r
 182                         {\r
 183                                 if(isTable)\r
 184                                         writer.RenderBeginTag(HtmlTextWriterTag.Tr);\r
 185                                 colIndex = 0;\r
 186                                 while(colIndex < colsCount)\r
 187                                 {\r
 188                                         if (rowIndex == rowsCount-1 && colIndex >= diff)\r
 189                                                 break;\r
 190                                         \r
 191                                         if (colIndex < diff)\r
 192                                                 index = rowIndex + colIndex * rowsCount;\r
 193                                         else\r
 194                                                 index = rowIndex + colIndex * (rowsCount-1) + diff;\r
 195 \r
 196                                         if(index < total)\r
 197                                         {\r
 198                                                 if(isTable)\r
 199                                                 {\r
 200                                                         itemStyle = user.GetItemStyle(ListItemType.Item, index);\r
 201                                                         if(itemStyle != null)\r
 202                                                         {\r
 203                                                                 itemStyle.AddAttributesToRender(writer);\r
 204                                                         }\r
 205                                                         writer.RenderBeginTag(HtmlTextWriterTag.Td);\r
 206                                                 }\r
 207                                                 user.RenderItem(ListItemType.Item, index, this, writer);\r
 208                                                 if(isTable)\r
 209                                                         writer.RenderEndTag();\r
 210                                                 if(hasSeps && index != (total - 1))\r
 211                                                 {\r
 212                                                         if(colsCount == 1)\r
 213                                                         {\r
 214                                                                 writer.RenderEndTag();\r
 215                                                                 writer.RenderBeginTag(HtmlTextWriterTag.Tr);\r
 216                                                         } else\r
 217                                                         {\r
 218                                                                 writer.WriteFullBeginTag("br");\r
 219                                                         }\r
 220                                                         if(isTable)\r
 221                                                         {\r
 222                                                                 itemStyle = user.GetItemStyle(ListItemType.Separator, index);\r
 223                                                                 if(itemStyle != null)\r
 224                                                                         itemStyle.AddAttributesToRender(writer);\r
 225                                                                 writer.RenderBeginTag(HtmlTextWriterTag.Td);\r
 226                                                         }\r
 227                                                         user.RenderItem(ListItemType.Separator, index, this, writer);\r
 228                                                         if(isTable)\r
 229                                                                 writer.RenderEndTag();\r
 230                                                 }\r
 231                                         }\r
 232                                         colIndex++;\r
 233                                 }\r
 234                                 if(isTable)\r
 235                                         writer.RenderEndTag();\r
 236                                 else\r
 237                                         if((rowIndex != (rowsCount - 1) || user.HasFooter) && !outerTableImp)\r
 238                                                 writer.WriteFullBeginTag("br");\r
 239                                 rowIndex++;\r
 240                         }\r
 241                         if(user.HasFooter)\r
 242                         {\r
 243                                 if(isTable)\r
 244                                 {\r
 245                                         writer.RenderBeginTag(HtmlTextWriterTag.Tr);\r
 246                                         if(colsCount != 1)\r
 247                                         {\r
 248                                                 writer.AddAttribute(HtmlTextWriterAttribute.Colspan, colSpan.ToString(NumberFormatInfo.InvariantInfo));\r
 249                                         }\r
 250                                         itemStyle = user.GetItemStyle(ListItemType.Footer, -1);\r
 251                                         if(itemStyle != null)\r
 252                                         {\r
 253                                                 itemStyle.AddAttributesToRender(writer);\r
 254                                         }\r
 255                                         writer.RenderBeginTag(HtmlTextWriterTag.Td);\r
 256                                 }\r
 257                                 user.RenderItem(ListItemType.Footer, -1, this, writer);\r
 258                                 if(isTable)\r
 259                                 {\r
 260                                         writer.RenderEndTag();\r
 261                                         writer.RenderEndTag();\r
 262                                 }\r
 263                         }\r
 264                         if(ctrl != null)\r
 265                         {\r
 266                                 ctrl.RenderEndTag(writer);\r
 267                         }\r
 268                 }\r
 269 \r
 270                 private void DoHorizontalRendering (HtmlTextWriter writer,\r
 271                                                     IRepeatInfoUser user,\r
 272                                                     Style controlStyle,\r
 273                                                     WebControl baseControl)\r
 274                 {\r
 275                         /* Based on DoVerticalRendering */\r
 276                         int total = user.RepeatedItemCount;\r
 277                         int colsCount = 0;\r
 278                         int rowsCount = 0;\r
 279                         WebControl ctrl = null;\r
 280                         bool isTable = true;\r
 281                         bool hasSeps = user.HasSeparators;\r
 282                         if (!outerTableImp){\r
 283                                 isTable = (RepeatLayout == RepeatLayout.Table);\r
 284                                 ctrl = (isTable) ? new Table () : new WebControl (HtmlTextWriterTag.Span);\r
 285                                 ctrl.ID = baseControl.ClientID;\r
 286                                 ctrl.CopyBaseAttributes (baseControl);\r
 287                                 ctrl.ApplyStyle (controlStyle);\r
 288                                 ctrl.RenderBeginTag (writer);\r
 289                         }\r
 290 \r
 291                         Style itemStyle;\r
 292                         int colSpan = 0;\r
 293                         if (user.HasHeader){\r
 294                                 if (isTable){\r
 295                                         writer.RenderBeginTag (HtmlTextWriterTag.Tr);\r
 296                                         if (colsCount != 1){\r
 297                                                 colSpan = colsCount;\r
 298                                                 if (hasSeps)\r
 299                                                         colSpan += colsCount;\r
 300                                                 writer.AddAttribute (HtmlTextWriterAttribute.Colspan,\r
 301                                                      colSpan.ToString (NumberFormatInfo.InvariantInfo));\r
 302                                         }\r
 303                                         itemStyle = user.GetItemStyle (ListItemType.Header, -1);\r
 304                                         if (itemStyle != null)\r
 305                                                 itemStyle.AddAttributesToRender (writer);\r
 306                                         writer.RenderBeginTag (HtmlTextWriterTag.Td);\r
 307                                 }\r
 308 \r
 309                                 user.RenderItem (ListItemType.Header, -1, this, writer);\r
 310                                 \r
 311                                 if (isTable){\r
 312                                         writer.RenderEndTag();\r
 313                                         writer.RenderEndTag();\r
 314                                 } else if (repeatColumns < user.RepeatedItemCount)\r
 315                                                 writer.WriteFullBeginTag ("br");\r
 316                         }\r
 317 \r
 318                         for (int index = 0; index < total; index++){\r
 319                                 if (isTable && index == 0)\r
 320                                         writer.RenderBeginTag (HtmlTextWriterTag.Tr);\r
 321 \r
 322                                 if (isTable){\r
 323                                         itemStyle = user.GetItemStyle (ListItemType.Item, index);\r
 324                                         if (itemStyle != null)\r
 325                                                 itemStyle.AddAttributesToRender(writer);\r
 326                                         writer.RenderBeginTag(HtmlTextWriterTag.Td);\r
 327                                 }\r
 328 \r
 329                                 user.RenderItem(ListItemType.Item, index, this, writer);\r
 330                                 if (isTable)\r
 331                                         writer.RenderEndTag ();\r
 332 \r
 333                                 if (hasSeps && index != (total - 1)){\r
 334                                         if (isTable){\r
 335                                                 itemStyle = user.GetItemStyle (ListItemType.Separator, index);\r
 336                                                 if (itemStyle != null)\r
 337                                                         itemStyle.AddAttributesToRender (writer);\r
 338                                                 writer.RenderBeginTag (HtmlTextWriterTag.Td);\r
 339                                         }\r
 340                                         user.RenderItem (ListItemType.Separator, index, this, writer);\r
 341                                         if (isTable)\r
 342                                                 writer.RenderEndTag ();\r
 343                                 }\r
 344 \r
 345                                 colsCount++;\r
 346                                 if (colsCount == repeatColumns) {\r
 347                                         if (isTable) {\r
 348                                                 writer.RenderEndTag ();\r
 349                                                 writer.RenderBeginTag (HtmlTextWriterTag.Tr);\r
 350                                         }\r
 351                                         else if (rowsCount < total)\r
 352                                                 writer.WriteFullBeginTag ("br");\r
 353                                         colsCount = 0;\r
 354                                 }\r
 355 \r
 356                                 if (index == (total - 1)) {\r
 357                                         if (isTable)\r
 358                                                 writer.RenderEndTag ();\r
 359                                         else if (rowsCount < total)\r
 360                                                 writer.WriteFullBeginTag ("br");\r
 361                                 }\r
 362                         }\r
 363 \r
 364                         if (user.HasFooter){\r
 365                                 if (isTable){\r
 366                                         writer.RenderBeginTag (HtmlTextWriterTag.Tr);\r
 367                                         if (colsCount != 1)\r
 368                                                 writer.AddAttribute (HtmlTextWriterAttribute.Colspan,\r
 369                                                         colSpan.ToString(NumberFormatInfo.InvariantInfo));\r
 370 \r
 371                                         itemStyle = user.GetItemStyle (ListItemType.Footer, -1);\r
 372                                         if(itemStyle != null)\r
 373                                                 itemStyle.AddAttributesToRender (writer);\r
 374                                         writer.RenderBeginTag (HtmlTextWriterTag.Td);\r
 375                                 }\r
 376                                 user.RenderItem (ListItemType.Footer, -1, this, writer);\r
 377                                 if (isTable){\r
 378                                         writer.RenderEndTag ();\r
 379                                         writer.RenderEndTag ();\r
 380                                 }\r
 381                         }\r
 382 \r
 383                         if (ctrl != null)\r
 384                                 ctrl.RenderEndTag(writer);\r
 385                 }\r
 386         }\r
 387 }\r