Add basic history api and implement it under gtk.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68108 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/webview_webkit.h

@@ -70,6 +70,8 @@ public:
     virtual void Reload(wxWebViewReloadFlags flags = wxWEB_VIEW_RELOAD_DEFAULT);
     virtual bool CanGoBack();
     virtual bool CanGoForward();
+    virtual void ClearHistory();
+    virtual void EnableHistory(bool enable = true);
     virtual wxString GetCurrentURL();
     virtual wxString GetCurrentTitle();
     virtual wxString GetPageSource();
@@ -107,6 +109,7 @@ private:
     void GTKOnFocus(wxFocusEvent& event);
 
     GtkWidget *web_view;
+    gint m_historyLimit;
 
     // FIXME: try to get DECLARE_DYNAMIC_CLASS macros & stuff right
     //DECLARE_DYNAMIC_CLASS(wxWebViewWebKit)

include/wx/msw/webview_ie.h

@@ -50,6 +50,8 @@ public:
     virtual bool CanGoBack() { return m_canNavigateBack; }
     virtual void GoBack();
     virtual void GoForward();
+    virtual void ClearHistory() {};
+    virtual void EnableHistory(bool enable = true) {};
     virtual void Stop();
     virtual void Reload(wxWebViewReloadFlags flags = wxWEB_VIEW_RELOAD_DEFAULT);
 

include/wx/webview.h

@@ -173,6 +173,9 @@ public:
      */
     virtual void LoadUrl(const wxString& url) = 0;
 
+    virtual void ClearHistory() = 0;
+    virtual void EnableHistory(bool enable = true) = 0;
+
     /**
      * Stop the current page loading process, if any.
      * May trigger an error event of type wxWEB_NAV_ERR_USER_CANCELLED.

interface/wx/webview.h

@@ -199,6 +199,16 @@ public:
     */
     virtual void GoForward() = 0;
 
+    /**
+        Clear the history, this will also remove the visible page.
+    */
+    virtual void ClearHistory() = 0;
+    
+    /**
+        Enable or disable the history. This will also clear the history.
+    */
+    virtual void EnableHistory(bool enable = true) = 0;
+    
     /**
         Load a HTMl document (web page) from a URL
         @param url the URL where the HTML document to display can be found

samples/web/web.cpp

@@ -60,6 +60,8 @@ public:
     void OnForward(wxCommandEvent& evt);
     void OnStop(wxCommandEvent& evt);
     void OnReload(wxCommandEvent& evt);
+    void OnClearHistory(wxCommandEvent& evt);
+    void OnEnableHistory(wxCommandEvent& evt);
     void OnNavigationRequest(wxWebNavigationEvent& evt);
     void OnNavigationComplete(wxWebNavigationEvent& evt);
     void OnDocumentLoaded(wxWebNavigationEvent& evt);
@@ -89,6 +91,7 @@ private:
     wxMenuItem* m_tools_largest;
     wxMenuItem* m_tools_handle_navigation;
     wxMenuItem* m_tools_handle_new_window;
+    wxMenuItem* m_tools_enable_history;
 
     wxTimer* m_timer;
     int m_animation_angle;
@@ -188,10 +191,14 @@ WebFrame::WebFrame() : wxFrame(NULL, wxID_ANY, "wxWebView Sample")
     m_tools_menu->AppendSeparator();
     m_tools_handle_navigation = m_tools_menu->AppendCheckItem(wxID_ANY, _("Handle Navigation"));
     m_tools_handle_new_window = m_tools_menu->AppendCheckItem(wxID_ANY, _("Handle New Windows"));
+    m_tools_menu->AppendSeparator();
+    wxMenuItem* clearhist =  m_tools_menu->Append(wxID_ANY, _("Clear History"));
+    m_tools_enable_history = m_tools_menu->AppendCheckItem(wxID_ANY, _("Enable History"));
 
     //By default we want to handle navigation and new windows
     m_tools_handle_navigation->Check();
     m_tools_handle_new_window->Check();
+    m_tools_enable_history->Check();
 
 
     // Connect the toolbar events
@@ -236,6 +243,10 @@ WebFrame::WebFrame() : wxFrame(NULL, wxID_ANY, "wxWebView Sample")
             wxCommandEventHandler(WebFrame::OnSetZoom),  NULL, this );
     Connect(m_tools_largest->GetId(), wxEVT_COMMAND_MENU_SELECTED,
             wxCommandEventHandler(WebFrame::OnSetZoom),  NULL, this );
+    Connect(clearhist->GetId(), wxEVT_COMMAND_MENU_SELECTED,
+            wxCommandEventHandler(WebFrame::OnClearHistory),  NULL, this );
+    Connect(m_tools_enable_history->GetId(), wxEVT_COMMAND_MENU_SELECTED,
+            wxCommandEventHandler(WebFrame::OnEnableHistory),  NULL, this );
 }
 
 void WebFrame::OnAnimationTimer(wxTimerEvent& evt)
@@ -348,6 +359,18 @@ void WebFrame::OnReload(wxCommandEvent& evt)
     UpdateState();
 }
 
+void WebFrame::OnClearHistory(wxCommandEvent& evt)
+{
+    m_browser->ClearHistory();
+    UpdateState();
+}
+
+void WebFrame::OnEnableHistory(wxCommandEvent& evt)
+{
+    m_browser->EnableHistory(m_tools_enable_history->IsChecked());
+    UpdateState();
+}
+
 /**
   * Callback invoked when there is a request to load a new page (for instance
   * when the user clicks a link)

src/gtk/webview_webkit.cpp

@@ -323,6 +323,11 @@ bool wxWebViewWebKit::Create(wxWindow *parent,
     /* Open a webpage */
     webkit_web_view_load_uri (WEBKIT_WEB_VIEW (web_view), url);
 
+    //Get the initial history limit so we can enable and disable it later
+    WebKitWebBackForwardList* history;
+    history = webkit_web_view_get_back_forward_list(WEBKIT_WEB_VIEW(web_view));
+    m_historyLimit = webkit_web_back_forward_list_get_limit(history);
+
     m_ready = true;
 
     return true;
@@ -413,6 +418,26 @@ bool wxWebViewWebKit::CanGoForward()
     return webkit_web_view_can_go_forward (WEBKIT_WEB_VIEW(web_view));
 }
 
+void wxWebViewWebKit::ClearHistory()
+{
+    WebKitWebBackForwardList* history;
+    history = webkit_web_view_get_back_forward_list(WEBKIT_WEB_VIEW(web_view));
+    webkit_web_back_forward_list_clear(history);
+}
+
+void wxWebViewWebKit::EnableHistory(bool enable)
+{
+    WebKitWebBackForwardList* history;
+    history = webkit_web_view_get_back_forward_list(WEBKIT_WEB_VIEW(web_view));
+    if(enable)
+    {
+        webkit_web_back_forward_list_set_limit(history, m_historyLimit);
+    }
+    else
+    {
+        webkit_web_back_forward_list_set_limit(history, 0);
+    }
+}
 
 wxString wxWebViewWebKit::GetCurrentURL()
 {