public static HtmlControl PageLinks([NotNull] PagerSettings <HtmlControl> pagerSettings)
{
if (pagerSettings.PageCount < 2)
{
return(null);
}
bool invokeRootCreated = pagerSettings.OnRootCreated != null;
bool invokePageCreated = pagerSettings.OnPageCreated != null;
HtmlControl rootTag = new HtmlGenericControl(HtmlTextWriterTag.Ul.ToString());
rootTag.AddCssClass("pagination");
if (invokeRootCreated)
{
pagerSettings.OnRootCreated(rootTag);
}
string liTagName = HtmlTextWriterTag.Li.ToString();
string spanTagName = HtmlTextWriterTag.Span.ToString();
int firstPage = 1, lastPage = pagerSettings.PageCount;
int firstAdjacentPage, lastAdjacentPage;
if (pagerSettings.AdjacentPageCount > 0)
{
if (pagerSettings.CurrentPage <= pagerSettings.AdjacentPageCount * 2)
{
firstAdjacentPage = firstPage;
lastAdjacentPage = Math.Min(firstPage + pagerSettings.AdjacentPageCount * 2, lastPage);
}
else if (pagerSettings.CurrentPage > lastPage - pagerSettings.AdjacentPageCount * 2)
{
firstAdjacentPage = lastPage - pagerSettings.AdjacentPageCount * 2;
lastAdjacentPage = lastPage;
}
else
{
firstAdjacentPage = pagerSettings.CurrentPage - pagerSettings.AdjacentPageCount;
lastAdjacentPage = pagerSettings.CurrentPage + pagerSettings.AdjacentPageCount;
}
}
else
{
firstAdjacentPage = firstPage;
lastAdjacentPage = lastPage;
}
if (pagerSettings.UseFirstAndLast)
{
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child;
if (pagerSettings.CurrentPage > firstPage)
{
child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(firstPage)
};
}
else
{
li.AddCssClass("disabled");
child = new HtmlGenericControl(spanTagName);
}
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, false);
}
HtmlControl innerSpan = new HtmlGenericControl(spanTagName)
{
InnerHtml = "«"
};
innerSpan.Attribute("aria-hidden", "true");
child.Controls.Add(innerSpan);
li.Controls.Add(child);
rootTag.Controls.Add(li);
}
if (pagerSettings.UsePreviousAndNext)
{
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child;
if (pagerSettings.CurrentPage > firstPage)
{
child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(pagerSettings.CurrentPage - 1)
};
}
else
{
li.AddCssClass("disabled");
child = new HtmlGenericControl(spanTagName);
}
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, false);
}
HtmlControl innerSpan = new HtmlGenericControl(spanTagName)
{
InnerHtml = "<"
};
innerSpan.Attribute("aria-hidden", "true");
child.Controls.Add(innerSpan);
li.Controls.Add(child);
rootTag.Controls.Add(li);
}
if (pagerSettings.AdjacentPageCount > 0 && firstAdjacentPage > firstPage)
{
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(firstPage), InnerHtml = firstPage.ToString()
};
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, false);
}
li.Controls.Add(child);
rootTag.Controls.Add(li);
if (firstAdjacentPage > firstPage + 1)
{
HtmlControl liEllipse = new HtmlGenericControl(liTagName);
HtmlControl childEllipse = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(firstAdjacentPage - 1), InnerHtml = "…"
};
if (invokePageCreated)
{
pagerSettings.OnPageCreated(liEllipse, childEllipse, false);
}
liEllipse.Controls.Add(childEllipse);
rootTag.Controls.Add(liEllipse);
}
}
for (int i = firstAdjacentPage; i <= lastAdjacentPage; i++)
{
bool isCurrent = pagerSettings.CurrentPage == i;
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child;
if (isCurrent)
{
li.AddCssClass("active");
child = new HtmlGenericControl(spanTagName)
{
InnerHtml = i.ToString()
};
}
else
{
child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(i), InnerHtml = i.ToString()
};
}
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, isCurrent);
}
li.Controls.Add(child);
rootTag.Controls.Add(li);
}
if (pagerSettings.AdjacentPageCount > 0 && lastAdjacentPage < lastPage)
{
if (lastAdjacentPage < lastPage - 1)
{
HtmlControl liEllipse = new HtmlGenericControl(liTagName);
HtmlControl childEllipse = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(lastAdjacentPage + 1), InnerHtml = "…"
};
if (invokePageCreated)
{
pagerSettings.OnPageCreated(liEllipse, childEllipse, false);
}
liEllipse.Controls.Add(childEllipse);
rootTag.Controls.Add(liEllipse);
}
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(lastPage), InnerHtml = lastPage.ToString()
};
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, false);
}
li.Controls.Add(child);
rootTag.Controls.Add(li);
}
if (pagerSettings.UsePreviousAndNext)
{
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child;
if (pagerSettings.CurrentPage < lastPage)
{
child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(pagerSettings.CurrentPage + 1)
};
}
else
{
li.AddCssClass("disabled");
child = new HtmlGenericControl(spanTagName);
}
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, false);
}
HtmlControl innerSpan = new HtmlGenericControl(spanTagName)
{
InnerHtml = ">"
};
innerSpan.Attribute("aria-hidden", "true");
child.Controls.Add(innerSpan);
li.Controls.Add(child);
rootTag.Controls.Add(li);
}
if (pagerSettings.UseFirstAndLast)
{
HtmlControl li = new HtmlGenericControl(liTagName);
HtmlControl child;
if (pagerSettings.CurrentPage < lastPage)
{
child = new HtmlAnchor {
HRef = pagerSettings.PageUrlHandler(lastPage)
};
}
else
{
li.AddCssClass("disabled");
child = new HtmlGenericControl(spanTagName);
}
if (invokePageCreated)
{
pagerSettings.OnPageCreated(li, child, false);
}
HtmlControl innerSpan = new HtmlGenericControl(spanTagName)
{
InnerHtml = "»"
};
innerSpan.Attribute("aria-hidden", "true");
child.Controls.Add(innerSpan);
li.Controls.Add(child);
rootTag.Controls.Add(li);
}
return(rootTag);
}
