Add CefBrowserSettings.history_disabled option to disable history back/forward navigation (issue #419).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@393 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/internal/cef_types.h

@@ -190,6 +190,11 @@ typedef struct _cef_browser_settings_t
   ///
   bool load_drops_disabled;
 
+  ///
+  // Disable history back/forward navigation.
+  ///
+  bool history_disabled;
+
   // The below values map to WebPreferences settings.
 
   ///

include/internal/cef_types_wrappers.h

@@ -324,6 +324,7 @@ struct CefBrowserSettingsTraits {
   {
     target->drag_drop_disabled = src->drag_drop_disabled;
     target->load_drops_disabled = src->load_drops_disabled;
+    target->history_disabled = src->history_disabled;
 
     cef_string_set(src->standard_font_family.str,
         src->standard_font_family.length, &target->standard_font_family, copy);

libcef/browser_navigation_controller.cc

@@ -43,11 +43,12 @@ void BrowserNavigationEntry::SetContentState(const std::string& state) {
 // ----------------------------------------------------------------------------
 // BrowserNavigationController
 
-BrowserNavigationController::BrowserNavigationController(CefBrowserImpl* shell)
+BrowserNavigationController::BrowserNavigationController(
+    CefBrowserImpl* browser)
     : pending_entry_(NULL),
       last_committed_entry_index_(-1),
       pending_entry_index_(-1),
-      browser_(shell),
+      browser_(browser),
       max_page_id_(-1) {
 }
 
@@ -60,6 +61,7 @@ void BrowserNavigationController::Reset() {
   DiscardPendingEntry();
 
   last_committed_entry_index_ = -1;
+  UpdateMaxPageID();
 }
 
 void BrowserNavigationController::Reload(bool ignoreCache) {
@@ -198,7 +200,13 @@ void BrowserNavigationController::DiscardPendingEntry() {
 void BrowserNavigationController::InsertEntry(BrowserNavigationEntry* entry) {
   DiscardPendingEntry();
 
-  // Prune any entry which are in front of the current entry
+  const CefBrowserSettings& settings = browser_->settings();
+  if (settings.history_disabled) {
+    // History is disabled. Remove any existing entries.
+    if (entries_.size() > 0)
+      entries_.clear();
+  } else {
+    // Prune any entry which are in front of the current entry.
     int current_size = static_cast<int>(entries_.size());
     if (current_size > 0) {
       while (last_committed_entry_index_ < (current_size - 1)) {
@@ -206,6 +214,7 @@ void BrowserNavigationController::InsertEntry(BrowserNavigationEntry* entry) {
         current_size--;
       }
     }
+  }
 
   entries_.push_back(linked_ptr<BrowserNavigationEntry>(entry));
   last_committed_entry_index_ = static_cast<int>(entries_.size()) - 1;

libcef/browser_navigation_controller.h

@@ -97,7 +97,7 @@ private:
 // version as possible.
 class BrowserNavigationController {
  public:
-  BrowserNavigationController(CefBrowserImpl* shell);
+  BrowserNavigationController(CefBrowserImpl* browser);
   ~BrowserNavigationController();
 
   void Reset();

tests/cefclient/cefclient.cpp

@@ -197,6 +197,8 @@ void AppGetBrowserSettings(CefBrowserSettings& settings)
       g_command_line->HasSwitch(cefclient::kDragDropDisabled);
   settings.load_drops_disabled =
       g_command_line->HasSwitch(cefclient::kLoadDropsDisabled);
+  settings.history_disabled =
+      g_command_line->HasSwitch(cefclient::kHistoryDisabled);
   settings.remote_fonts_disabled =
       g_command_line->HasSwitch(cefclient::kRemoteFontsDisabled);
 

tests/cefclient/cefclient_switches.cpp

@@ -32,6 +32,7 @@ const char kJavascriptFlags[] = "javascript-flags";
 // CefBrowserSettings attributes.
 const char kDragDropDisabled[] = "drag-drop-disabled";
 const char kLoadDropsDisabled[] = "load-drops-disabled";
+const char kHistoryDisabled[] = "history-disabled";
 const char kRemoteFontsDisabled[] = "remote-fonts-disabled";
 const char kDefaultEncoding[] = "default-encoding";
 const char kEncodingDetectorEnabled[] = "encoding-detector-enabled";

tests/cefclient/cefclient_switches.h

@@ -35,6 +35,7 @@ extern const char kJavascriptFlags[];
 // CefBrowserSettings attributes.
 extern const char kDragDropDisabled[];
 extern const char kLoadDropsDisabled[];
+extern const char kHistoryDisabled[];
 extern const char kRemoteFontsDisabled[];
 extern const char kDefaultEncoding[];
 extern const char kEncodingDetectorEnabled[];