public void pushState(object state, string title, string url)
{
HistoryState hs = CreateState(state, title, url);
// Add to back:
back_.Add(current);
current = hs; // Don't dispatch.
}
internal void DocumentNavigated()
{
if (current != null)
{
Push(true, current);
}
// Create current:
current = CreateState(null, null, null);
}
/// <summary>Loads the given state now.</summary>
private void LoadNow(HistoryState state)
{
if (state == current)
{
// Reload:
window.document.location.reload();
}
else
{
// Set as current:
current = state;
Dispatch();
// Go there now (handles relative urls for us):
window.document.location.assign(state.url, false);
}
}
private void Push(bool back, HistoryState state)
{
List <HistoryState> stack = back?back_ : forward_;
if (stack == null)
{
stack = new List <HistoryState>();
if (back)
{
back_ = stack;
}
else
{
forward_ = stack;
}
}
stack.Add(state);
}
private HistoryState CreateState(object state, string title, string url)
{
if (window.document != null)
{
if (url == null)
{
url = window.document.baseURI;
}
if (title == null)
{
title = window.document.title;
}
}
HistoryState hs = new HistoryState();
hs.state = state;
hs.title = title;
hs.url = url;
return(hs);
}
public void go(int delta)
{
if (delta == 0)
{
LoadNow(current);
return;
}
HistoryState state = null;
bool back = (delta < 0);
List <HistoryState> set;
if (back)
{
// Going back
delta = -delta;
set = back_;
}
else
{
set = forward_;
}
// Range check - got enough scope for delta?
if (set == null || set.Count < delta)
{
// Nope - silently do nothing.
return;
}
// Pop and push (always in range):
for (int i = 0; i < delta; i++)
{
// Pop:
state = set[set.Count - 1];
set.RemoveAt(set.Count - 1);
// Push current:
Push(!back, current);
// Update current (don't dispatch just yet):
// current=state;
}
if (set.Count == 0)
{
// Clear it:
if (back)
{
back_ = null;
}
else
{
forward_ = null;
}
}
// Dispatch:
LoadNow(state);
}
public void replaceState(object state, string title, string url)
{
// Don't dispatch.
current = CreateState(state, title, url);
}