From 19fc1a2f0d8523e8d31b40e7b83a058faacc20c2 Mon Sep 17 00:00:00 2001
From: Steve Lamerton <steve.lamerton@gmail.com>
Date: Fri, 1 Jul 2011 19:46:31 +0000
Subject: [PATCH] Implement extended history api in gtk

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68122 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/gtk/webview_webkit.h | 36 ++++++++++++++++++++++++
 src/gtk/webview_webkit.cpp      | 50 +++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+)

diff --git a/include/wx/gtk/webview_webkit.h b/include/wx/gtk/webview_webkit.h
index dfd6f2877e..54d5a3f762 100644
--- a/include/wx/gtk/webview_webkit.h
+++ b/include/wx/gtk/webview_webkit.h
@@ -14,8 +14,40 @@
 
 #if wxUSE_WEBVIEW_WEBKIT
 
+#include "webkit/webkit.h"
+#include "wx/sharedptr.h"
 #include "wx/webview.h"
 
+//A set of hash function so we can map wxWebHistoryItems to WebKitWebHistoryItems
+class SharedPtrHash
+{
+public:
+    SharedPtrHash() { }
+
+    unsigned long operator()( const wxSharedPtr<wxWebHistoryItem> & item ) const
+    {
+        
+        return wxPointerHash()(item.get());
+    }
+    SharedPtrHash& operator=(const SharedPtrHash&) { return *this; }
+};
+
+class SharedPtrEqual
+{
+public:
+    SharedPtrEqual() { }
+    bool operator()( const wxSharedPtr<wxWebHistoryItem> & a,
+                     const wxSharedPtr<wxWebHistoryItem> & b ) const
+    {
+        return wxPointerEqual()(a.get(), b.get());
+    }
+
+    SharedPtrEqual& operator=(const SharedPtrEqual&) { return *this; }
+};
+
+WX_DECLARE_HASH_MAP(wxSharedPtr<wxWebHistoryItem>, WebKitWebHistoryItem*,
+                    SharedPtrHash, SharedPtrEqual, HistoryItemHash);
+
 //-----------------------------------------------------------------------------
 // wxWebViewWebKit
 //-----------------------------------------------------------------------------
@@ -72,6 +104,9 @@ public:
     virtual bool CanGoForward();
     virtual void ClearHistory();
     virtual void EnableHistory(bool enable = true);
+    virtual wxVector<wxSharedPtr<wxWebHistoryItem> > GetBackwardHistory();
+    virtual wxVector<wxSharedPtr<wxWebHistoryItem> > GetForwardHistory();
+    virtual void LoadHistoryItem(wxSharedPtr<wxWebHistoryItem> item);
     virtual wxString GetCurrentURL();
     virtual wxString GetCurrentTitle();
     virtual wxString GetPageSource();
@@ -110,6 +145,7 @@ private:
 
     GtkWidget *web_view;
     gint m_historyLimit;
+    HistoryItemHash m_historyMap;
 
     // FIXME: try to get DECLARE_DYNAMIC_CLASS macros & stuff right
     //DECLARE_DYNAMIC_CLASS(wxWebViewWebKit)
diff --git a/src/gtk/webview_webkit.cpp b/src/gtk/webview_webkit.cpp
index 4c79cfb81c..ae1ab1212f 100644
--- a/src/gtk/webview_webkit.cpp
+++ b/src/gtk/webview_webkit.cpp
@@ -439,6 +439,56 @@ void wxWebViewWebKit::EnableHistory(bool enable)
     }
 }
 
+wxVector<wxSharedPtr<wxWebHistoryItem> > wxWebViewWebKit::GetBackwardHistory()
+{
+    wxVector<wxSharedPtr<wxWebHistoryItem> > backhist; 
+    WebKitWebBackForwardList* history;
+    history = webkit_web_view_get_back_forward_list(WEBKIT_WEB_VIEW(web_view));
+    GList* list = webkit_web_back_forward_list_get_back_list_with_limit(history, 
+                                                                        m_historyLimit);
+    //We need to iterate in reverse to get the order we desire
+    for(int i = g_list_length(list) - 1; i >= 0 ; i--)
+    {
+        WebKitWebHistoryItem* gtkitem = (WebKitWebHistoryItem*)g_list_nth_data(list, i);
+        wxSharedPtr<wxWebHistoryItem> item(new wxWebHistoryItem(
+                                           webkit_web_history_item_get_uri(gtkitem),
+                                           webkit_web_history_item_get_title(gtkitem)));
+        backhist.push_back(item);
+        m_historyMap[item] = gtkitem;
+    }
+    return backhist;
+}
+
+wxVector<wxSharedPtr<wxWebHistoryItem> > wxWebViewWebKit::GetForwardHistory()
+{
+    wxVector<wxSharedPtr<wxWebHistoryItem> > forwardhist; 
+    WebKitWebBackForwardList* history;
+    history = webkit_web_view_get_back_forward_list(WEBKIT_WEB_VIEW(web_view));
+    GList* list = webkit_web_back_forward_list_get_forward_list_with_limit(history, 
+                                                                           m_historyLimit);
+    for(guint i = 0; i < g_list_length(list); i++)
+    {
+        WebKitWebHistoryItem* gtkitem = (WebKitWebHistoryItem*)g_list_nth_data(list, i);
+        wxSharedPtr<wxWebHistoryItem> item(new wxWebHistoryItem(
+                                           webkit_web_history_item_get_uri(gtkitem),
+                                           webkit_web_history_item_get_title(gtkitem)));
+        forwardhist.push_back(item);
+        m_historyMap[item] = gtkitem;
+    }
+    return forwardhist;
+}
+
+void wxWebViewWebKit::LoadHistoryItem(wxSharedPtr<wxWebHistoryItem> item)
+{
+    WebKitWebHistoryItem* gtkitem = m_historyMap[item];
+    if(gtkitem)
+    {
+        WebKitWebBackForwardList* history;
+        history = webkit_web_view_get_back_forward_list(WEBKIT_WEB_VIEW(web_view));
+        webkit_web_back_forward_list_go_to_item(history, gtkitem);
+    }
+}
+
 wxString wxWebViewWebKit::GetCurrentURL()
 {
     // FIXME: check which encoding the web kit control uses instead of
-- 
2.45.2