660 lines
26 KiB
C#
660 lines
26 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="RepeatInfo.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.WebControls {
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using System;
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using System.Globalization;
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using System.Web;
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using System.Web.UI;
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using System.Web.Util;
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/// <devdoc>
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/// <para>Defines the information used to render a list of items using
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/// a <see cref='System.Web.UI.WebControls.Repeater'/>.</para>
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/// </devdoc>
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public sealed class RepeatInfo {
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private RepeatDirection repeatDirection;
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private RepeatLayout repeatLayout;
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private int repeatColumns;
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private string caption;
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private TableCaptionAlign captionAlign;
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private bool useAccessibleHeader;
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private bool outerTableImplied;
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private bool enableLegacyRendering;
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/// <devdoc>
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/// <para>Initializes a new instance of the <see cref='System.Web.UI.WebControls.RepeatInfo'/> class. This class is not
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/// inheritable.</para>
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/// </devdoc>
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public RepeatInfo() {
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repeatDirection = RepeatDirection.Vertical;
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repeatLayout = RepeatLayout.Table;
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repeatColumns = 0;
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outerTableImplied = false;
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}
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public string Caption {
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get {
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return (caption == null) ? String.Empty : caption;
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}
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set {
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caption = value;
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}
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}
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public TableCaptionAlign CaptionAlign {
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get {
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return captionAlign;
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}
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set {
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if ((value < TableCaptionAlign.NotSet) ||
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(value > TableCaptionAlign.Right)) {
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throw new ArgumentOutOfRangeException("value");
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}
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captionAlign = value;
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}
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}
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// DevDiv 33149: A backward compat. switch for Everett rendering
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internal bool EnableLegacyRendering {
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get {
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return enableLegacyRendering;
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}
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set {
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enableLegacyRendering = value;
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}
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}
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private bool IsListLayout {
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get {
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return
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(RepeatLayout == RepeatLayout.UnorderedList) ||
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(RepeatLayout == RepeatLayout.OrderedList);
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}
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}
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/// <devdoc>
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/// Indicates whether an outer table is implied
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/// for the items.
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/// </devdoc>
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public bool OuterTableImplied {
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get {
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return outerTableImplied;
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}
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set {
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outerTableImplied = value;
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}
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}
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/// <devdoc>
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/// <para> Indicates the column count of items.</para>
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/// </devdoc>
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public int RepeatColumns {
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get {
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return repeatColumns;
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}
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set {
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repeatColumns = value;
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}
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}
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/// <devdoc>
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/// <para>Indicates the direction of flow of items.</para>
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/// </devdoc>
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public RepeatDirection RepeatDirection {
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get {
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return repeatDirection;
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}
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set {
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if (value < RepeatDirection.Horizontal || value > RepeatDirection.Vertical) {
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throw new ArgumentOutOfRangeException("value");
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}
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repeatDirection = value;
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}
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}
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/// <devdoc>
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/// Indicates the layout of items.
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/// </devdoc>
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public RepeatLayout RepeatLayout {
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get {
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return repeatLayout;
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}
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set {
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EnumerationRangeValidationUtil.ValidateRepeatLayout(value);
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repeatLayout = value;
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}
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}
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public bool UseAccessibleHeader {
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get {
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return useAccessibleHeader;
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}
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set {
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useAccessibleHeader = value;
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}
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}
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/// <devdoc>
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/// </devdoc>
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private void RenderHorizontalRepeater(HtmlTextWriter writer, IRepeatInfoUser user, Style controlStyle, WebControl baseControl) {
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Debug.Assert(outerTableImplied == false, "Cannot use outer implied table with Horizontal layout");
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int itemCount = user.RepeatedItemCount;
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int totalColumns = repeatColumns;
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int currentColumn = 0;
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if (totalColumns == 0) {
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// 0 implies a complete horizontal repetition without any
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// column count constraints
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totalColumns = itemCount;
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}
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WebControl outerControl = null;
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bool tableLayout = false;
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switch (repeatLayout) {
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case RepeatLayout.Table:
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outerControl = new Table();
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if (Caption.Length != 0) {
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((Table)outerControl).Caption = Caption;
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((Table)outerControl).CaptionAlign = CaptionAlign;
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}
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tableLayout = true;
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break;
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case RepeatLayout.Flow:
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outerControl = new WebControl(HtmlTextWriterTag.Span);
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break;
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}
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bool separators = user.HasSeparators;
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// use ClientID (and not ID) since we want to render out the fully qualified client id
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// even though this outer control will not be parented to the control hierarchy
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outerControl.ID = baseControl.ClientID;
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outerControl.CopyBaseAttributes(baseControl);
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outerControl.ApplyStyle(controlStyle);
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outerControl.RenderBeginTag(writer);
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if (user.HasHeader) {
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if (tableLayout) {
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writer.RenderBeginTag(HtmlTextWriterTag.Tr);
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// add attributes to render for TD/TH
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if ((totalColumns != 1) || separators) {
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int columnSpan = totalColumns;
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if (separators)
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columnSpan += totalColumns;
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writer.AddAttribute(HtmlTextWriterAttribute.Colspan, columnSpan.ToString(NumberFormatInfo.InvariantInfo));
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}
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if (useAccessibleHeader) {
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writer.AddAttribute(HtmlTextWriterAttribute.Scope, "col");
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}
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// add style attributes to render for TD/TH
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Style style = user.GetItemStyle(ListItemType.Header, -1);
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if (style != null) {
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style.AddAttributesToRender(writer);
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}
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// render begin tag
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if (useAccessibleHeader) {
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writer.RenderBeginTag(HtmlTextWriterTag.Th);
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}
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else {
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writer.RenderBeginTag(HtmlTextWriterTag.Td);
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}
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}
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user.RenderItem(ListItemType.Header, -1, this, writer);
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if (tableLayout) {
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// render end tags TD/TH and TR
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writer.RenderEndTag();
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writer.RenderEndTag();
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}
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else {
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if (totalColumns < itemCount) {
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// we have multiple rows, so have a break between the header and first row.
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if (EnableLegacyRendering) {
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writer.WriteObsoleteBreak();
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}
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else {
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writer.WriteBreak();
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}
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}
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}
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}
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for (int i = 0; i < itemCount; i++) {
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if (tableLayout && (currentColumn == 0)) {
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writer.RenderBeginTag(HtmlTextWriterTag.Tr);
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}
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if (tableLayout) {
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// add style attributes to render for TD
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Style style = user.GetItemStyle(ListItemType.Item, i);
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if (style != null)
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style.AddAttributesToRender(writer);
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// render begin tag for TD
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writer.RenderBeginTag(HtmlTextWriterTag.Td);
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}
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user.RenderItem(ListItemType.Item, i, this, writer);
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if (tableLayout) {
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// render end tag for TD
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writer.RenderEndTag();
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}
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if (separators && (i != (itemCount - 1))) {
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if (tableLayout) {
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Style style = user.GetItemStyle(ListItemType.Separator, i);
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if (style != null)
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style.AddAttributesToRender(writer);
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writer.RenderBeginTag(HtmlTextWriterTag.Td);
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}
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user.RenderItem(ListItemType.Separator, i, this, writer);
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if (tableLayout)
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writer.RenderEndTag();
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}
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currentColumn++;
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// on the last line, fill in the rest of the empty spots with <td/>s.
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// If there were separators, we need twice as many plus one to accomodate for
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// the last item not having a separator after it.
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if (tableLayout && i == itemCount - 1) {
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int unfilledColumns = totalColumns - currentColumn;
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if (separators == true) {
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int unfilledColumnsWithSeparators = (unfilledColumns * 2) + 1;
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if (unfilledColumnsWithSeparators > unfilledColumns) {
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unfilledColumns = unfilledColumnsWithSeparators;
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}
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}
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for (int k = 0; k < unfilledColumns; k++) {
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writer.RenderBeginTag(HtmlTextWriterTag.Td);
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writer.RenderEndTag();
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}
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}
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if ((currentColumn == totalColumns) || (i == itemCount - 1)) {
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if (tableLayout) {
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// End tag for TR
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writer.RenderEndTag();
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}
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else {
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// write out the <br> after rows when there are multiple rows
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if (totalColumns < itemCount) {
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if (EnableLegacyRendering) {
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writer.WriteObsoleteBreak();
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}
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else {
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writer.WriteBreak();
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}
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}
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}
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currentColumn = 0;
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}
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}
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if (user.HasFooter) {
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if (tableLayout) {
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writer.RenderBeginTag(HtmlTextWriterTag.Tr);
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if ((totalColumns != 1) || separators) {
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// add attributes to render for TD
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int columnSpan = totalColumns;
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if (separators)
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columnSpan += totalColumns;
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writer.AddAttribute(HtmlTextWriterAttribute.Colspan, columnSpan.ToString(NumberFormatInfo.InvariantInfo));
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}
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// add style attributes to render for TD
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Style style = user.GetItemStyle(ListItemType.Footer, -1);
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if (style != null)
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style.AddAttributesToRender(writer);
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// render begin tag for TD
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writer.RenderBeginTag(HtmlTextWriterTag.Td);
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}
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user.RenderItem(ListItemType.Footer, -1, this, writer);
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if (tableLayout) {
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// render end tag for TR and TD
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writer.RenderEndTag();
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writer.RenderEndTag();
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}
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}
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outerControl.RenderEndTag(writer);
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}
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/// <devdoc>
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/// <para>Renders the Repeater with the specified
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/// information.</para>
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/// </devdoc>
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public void RenderRepeater(HtmlTextWriter writer, IRepeatInfoUser user, Style controlStyle, WebControl baseControl) {
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if (IsListLayout) {
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if (user.HasFooter || user.HasHeader || user.HasSeparators) {
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throw new InvalidOperationException(SR.GetString(SR.RepeatInfo_ListLayoutDoesNotSupportHeaderFooterSeparator));
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}
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if (RepeatDirection != RepeatDirection.Vertical) {
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throw new InvalidOperationException(SR.GetString(SR.RepeatInfo_ListLayoutOnlySupportsVerticalLayout));
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}
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if ((RepeatColumns != 0) && (RepeatColumns != 1)) {
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throw new InvalidOperationException(SR.GetString(SR.RepeatInfo_ListLayoutDoesNotSupportMultipleColumn));
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}
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if (OuterTableImplied) {
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throw new InvalidOperationException(SR.GetString(SR.RepeatInfo_ListLayoutDoesNotSupportImpliedOuterTable));
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}
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}
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if (repeatDirection == RepeatDirection.Vertical) {
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RenderVerticalRepeater(writer, user, controlStyle, baseControl);
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}
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else {
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RenderHorizontalRepeater(writer, user, controlStyle, baseControl);
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}
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}
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/// <devdoc>
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/// </devdoc>
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private void RenderVerticalRepeater(HtmlTextWriter writer, IRepeatInfoUser user, Style controlStyle, WebControl baseControl) {
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int itemCount = user.RepeatedItemCount;
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int totalColumns;
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int totalRows;
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int filledColumns;
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// List Layout Constraint --> Columns = 0 or 1
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if ((repeatColumns == 0) || (repeatColumns == 1)) {
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// A RepeatColumns of 0 implies a completely vertical repetition in
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// a single column. This is same as repeatColumns of 1.
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totalColumns = 1;
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filledColumns = 1;
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totalRows = itemCount;
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}
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else {
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totalColumns = repeatColumns;
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totalRows = (int)((itemCount + repeatColumns - 1) / repeatColumns);
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if ((totalRows == 0) && (itemCount != 0)) {
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// if repeatColumns is a huge number like Int32.MaxValue, then the
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// calculation above essentially reduces down to 0
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totalRows = 1;
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}
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filledColumns = itemCount % totalColumns;
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if (filledColumns == 0) {
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filledColumns = totalColumns;
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}
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}
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WebControl outerControl = null;
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bool tableLayout = false;
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// List Layout Constraint --> OuterTableImplied = false
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// List Layout Constraint --> tableLayout = false
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if (!outerTableImplied) {
|
||
|
|
switch (repeatLayout) {
|
||
|
|
case RepeatLayout.Table:
|
||
|
|
outerControl = new Table();
|
||
|
|
if (Caption.Length != 0) {
|
||
|
|
((Table)outerControl).Caption = Caption;
|
||
|
|
((Table)outerControl).CaptionAlign = CaptionAlign;
|
||
|
|
}
|
||
|
|
tableLayout = true;
|
||
|
|
break;
|
||
|
|
case RepeatLayout.Flow:
|
||
|
|
outerControl = new WebControl(HtmlTextWriterTag.Span);
|
||
|
|
break;
|
||
|
|
case RepeatLayout.UnorderedList:
|
||
|
|
outerControl = new WebControl(HtmlTextWriterTag.Ul);
|
||
|
|
break;
|
||
|
|
case RepeatLayout.OrderedList:
|
||
|
|
outerControl = new WebControl(HtmlTextWriterTag.Ol);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool separators = user.HasSeparators;
|
||
|
|
// List Layout Constraint --> separators = false
|
||
|
|
|
||
|
|
if (outerControl != null) {
|
||
|
|
// use ClientID (and not ID) since we want to render out the fully qualified client id
|
||
|
|
// even though this outer control will not be parented to the control hierarchy
|
||
|
|
outerControl.ID = baseControl.ClientID;
|
||
|
|
|
||
|
|
outerControl.CopyBaseAttributes(baseControl);
|
||
|
|
outerControl.ApplyStyle(controlStyle);
|
||
|
|
outerControl.RenderBeginTag(writer);
|
||
|
|
}
|
||
|
|
|
||
|
|
// List Layout Constraint --> HasHeader = false
|
||
|
|
if (user.HasHeader) {
|
||
|
|
if (tableLayout) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
|
||
|
|
|
||
|
|
// add attributes to render for TH
|
||
|
|
if (totalColumns != 1) {
|
||
|
|
int columnSpan = totalColumns;
|
||
|
|
if (separators)
|
||
|
|
columnSpan += totalColumns;
|
||
|
|
writer.AddAttribute(HtmlTextWriterAttribute.Colspan, columnSpan.ToString(NumberFormatInfo.InvariantInfo));
|
||
|
|
}
|
||
|
|
if (useAccessibleHeader) {
|
||
|
|
writer.AddAttribute(HtmlTextWriterAttribute.Scope, "col");
|
||
|
|
}
|
||
|
|
|
||
|
|
// add style attributes to render for TD/TH
|
||
|
|
Style style = user.GetItemStyle(ListItemType.Header, -1);
|
||
|
|
if (style != null) {
|
||
|
|
style.AddAttributesToRender(writer);
|
||
|
|
}
|
||
|
|
|
||
|
|
// render begin tag for TD/TH
|
||
|
|
if (useAccessibleHeader) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Th);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Td);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
user.RenderItem(ListItemType.Header, -1, this, writer);
|
||
|
|
if (tableLayout) {
|
||
|
|
// render end tags TD/TH and TR
|
||
|
|
writer.RenderEndTag();
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
else if (!outerTableImplied) {
|
||
|
|
if (EnableLegacyRendering) {
|
||
|
|
writer.WriteObsoleteBreak();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
writer.WriteBreak();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int itemCounter = 0;
|
||
|
|
|
||
|
|
for (int currentRow = 0; currentRow < totalRows; currentRow++) {
|
||
|
|
// List Layout Constraint --> tableLayout = false
|
||
|
|
if (tableLayout) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
|
||
|
|
}
|
||
|
|
|
||
|
|
int itemIndex = currentRow;
|
||
|
|
|
||
|
|
for (int currentCol = 0; currentCol < totalColumns; currentCol++) {
|
||
|
|
if (itemCounter >= itemCount) {
|
||
|
|
// done rendering all items, so break out of the loop now...
|
||
|
|
// we might end up here, in unfilled columns attempting to re-render items that
|
||
|
|
// have already been rendered on the next column in a prior row.
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (currentCol != 0) {
|
||
|
|
itemIndex += totalRows;
|
||
|
|
|
||
|
|
// if the previous column (currentColumn - 1) was not a filled column, i.e.,
|
||
|
|
// it had one less item (the maximum possible), then subtract 1 from the item index.
|
||
|
|
if ((currentCol - 1) >= filledColumns) {
|
||
|
|
itemIndex--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if (itemIndex >= itemCount)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
itemCounter++;
|
||
|
|
|
||
|
|
// List Layout Constraint --> tableLayout = false
|
||
|
|
if (tableLayout) {
|
||
|
|
// add style attributes to render for TD
|
||
|
|
Style style = user.GetItemStyle(ListItemType.Item, itemIndex);
|
||
|
|
if (style != null)
|
||
|
|
style.AddAttributesToRender(writer);
|
||
|
|
// render begin tag for TD
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Td);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (IsListLayout) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Li);
|
||
|
|
}
|
||
|
|
|
||
|
|
user.RenderItem(ListItemType.Item, itemIndex, this, writer);
|
||
|
|
|
||
|
|
if (IsListLayout) {
|
||
|
|
writer.RenderEndTag();
|
||
|
|
writer.WriteLine();
|
||
|
|
}
|
||
|
|
|
||
|
|
// List Layout Constraint --> tableLayout = false
|
||
|
|
if (tableLayout) {
|
||
|
|
// render end tag for TD
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
|
||
|
|
// List Layout Constraint --> separators = false
|
||
|
|
if (separators) {
|
||
|
|
if (itemIndex != (itemCount - 1)) {
|
||
|
|
if (totalColumns == 1) {
|
||
|
|
if (tableLayout) {
|
||
|
|
writer.RenderEndTag();
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (!outerTableImplied) {
|
||
|
|
if (EnableLegacyRendering) {
|
||
|
|
writer.WriteObsoleteBreak();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
writer.WriteBreak();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (tableLayout) {
|
||
|
|
Style style = user.GetItemStyle(ListItemType.Separator, itemIndex);
|
||
|
|
if (style != null)
|
||
|
|
style.AddAttributesToRender(writer);
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Td);
|
||
|
|
}
|
||
|
|
if (itemIndex < itemCount)
|
||
|
|
user.RenderItem(ListItemType.Separator, itemIndex, this, writer);
|
||
|
|
if (tableLayout)
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// if we're on the last filled line and separators are specified, add another <td/>
|
||
|
|
// to accomodate for the lack of a separator on the last item. If there's only one
|
||
|
|
// column, though, separators will get their own row anyways.
|
||
|
|
if (tableLayout && totalColumns > 1) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Td);
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// on the last line, fill in the remaining empty slots with <td/>s. We need twice as many
|
||
|
|
// if there were separators.
|
||
|
|
// List Layout Constraint --> tableLayout = false
|
||
|
|
if (tableLayout) {
|
||
|
|
if (currentRow == totalRows - 1) {
|
||
|
|
int unfilledColumns = totalColumns - filledColumns;
|
||
|
|
if (separators) {
|
||
|
|
int unfilledColumnsWithSeparators = unfilledColumns * 2;
|
||
|
|
if (unfilledColumnsWithSeparators >= unfilledColumns) {
|
||
|
|
unfilledColumns = unfilledColumnsWithSeparators;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (unfilledColumns != 0) {
|
||
|
|
for (int i = 0; i < unfilledColumns; i++) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Td);
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (((currentRow != totalRows - 1) || user.HasFooter) &&
|
||
|
|
(!outerTableImplied) && (!IsListLayout)) {
|
||
|
|
|
||
|
|
if (EnableLegacyRendering) {
|
||
|
|
writer.WriteObsoleteBreak();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
writer.WriteBreak();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// List Layout Constraint --> HasFooter = false
|
||
|
|
if (user.HasFooter) {
|
||
|
|
if (tableLayout) {
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
|
||
|
|
// add attributes to render for TD
|
||
|
|
if (totalColumns != 1) {
|
||
|
|
int columnSpan = totalColumns;
|
||
|
|
if (separators)
|
||
|
|
columnSpan += totalColumns;
|
||
|
|
writer.AddAttribute(HtmlTextWriterAttribute.Colspan, columnSpan.ToString(NumberFormatInfo.InvariantInfo));
|
||
|
|
}
|
||
|
|
// add style attributes to render for TD
|
||
|
|
Style style = user.GetItemStyle(ListItemType.Footer, -1);
|
||
|
|
if (style != null)
|
||
|
|
style.AddAttributesToRender(writer);
|
||
|
|
// render begin tag for TD
|
||
|
|
writer.RenderBeginTag(HtmlTextWriterTag.Td);
|
||
|
|
}
|
||
|
|
user.RenderItem(ListItemType.Footer, -1, this, writer);
|
||
|
|
if (tableLayout) {
|
||
|
|
// render end tag for TR and TD
|
||
|
|
writer.RenderEndTag();
|
||
|
|
writer.RenderEndTag();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (outerControl != null)
|
||
|
|
outerControl.RenderEndTag(writer);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|