lokdocview: implement LOK_CALLBACK_STATE_CHANGED

Change-Id: I239849056dd88f785dce239c4d53d6c905177b64

include/LibreOfficeKit/LibreOfficeKitGtk.h

@@ -38,6 +38,7 @@ struct _LOKDocViewClass
 {
   GtkScrolledWindowClass parent_class;
   void (* edit_changed)  (LOKDocView* pView, gboolean was_edit);
+  void (* command_changed) (LOKDocView* pView, char* new_state);
 };
 
 guint           lok_docview_get_type        (void);

libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx

@@ -10,6 +10,7 @@
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>
+#include <string>
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
@@ -31,6 +32,7 @@ static int help()
 static GtkWidget* pDocView;
 static GtkToolItem* pEnableEditing;
 static GtkToolItem* pBold;
+bool g_bToolItemBroadcast = true;
 static GtkWidget* pVBox;
 // GtkComboBox requires gtk 2.24 or later
 #if ( GTK_MAJOR_VERSION == 2 && GTK_MINOR_VERSION >= 24 ) || GTK_MAJOR_VERSION > 2
@@ -107,11 +109,41 @@ static void signalEdit(LOKDocView* pLOKDocView, gboolean bWasEdit, gpointer /*pD
         gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(pEnableEditing), bEdit);
 }
 
+/// LOKDocView changed command state -> inform the tool button.
+static void signalCommand(LOKDocView* /*pLOKDocView*/, char* pPayload, gpointer /*pData*/)
+{
+    std::string aPayload(pPayload);
+    size_t nPosition = aPayload.find("=");
+    if (nPosition != std::string::npos)
+    {
+        std::string aKey = aPayload.substr(0, nPosition);
+        std::string aValue = aPayload.substr(nPosition + 1);
+        g_info("signalCommand: '%s' is '%s'", aKey.c_str(), aValue.c_str());
+
+        GtkToolItem* pItem = 0;
+        if (aKey == ".uno:Bold")
+            pItem = pBold;
+
+        if (pItem)
+        {
+            bool bEdit = aValue == "true";
+            if (gtk_toggle_tool_button_get_active(GTK_TOGGLE_TOOL_BUTTON(pItem)) != bEdit)
+            {
+                // Avoid invoking lok_docview_post_command().
+                g_bToolItemBroadcast = false;
+                gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(pItem), bEdit);
+                g_bToolItemBroadcast = true;
+            }
+        }
+    }
+}
+
 /// User clicked on the 'Bold' button -> inform LOKDocView.
 void toggleBold(GtkWidget* /*pButton*/, gpointer /*pItem*/)
 {
     LOKDocView* pLOKDocView = LOK_DOCVIEW(pDocView);
 
+    if (g_bToolItemBroadcast)
         lok_docview_post_command(pLOKDocView, ".uno:Bold");
 }
 
@@ -265,6 +297,7 @@ int main( int argc, char* argv[] )
     // Docview
     pDocView = lok_docview_new( pOffice );
     g_signal_connect(pDocView, "edit-changed", G_CALLBACK(signalEdit), NULL);
+    g_signal_connect(pDocView, "command-changed", G_CALLBACK(signalCommand), NULL);
 
     // Input handling.
     g_signal_connect(pWindow, "key-press-event", G_CALLBACK(lok_docview_post_key), pDocView);

libreofficekit/source/gtk/lokdocview.cxx

@@ -182,6 +182,8 @@ struct LOKDocView_Impl
     static void callbackWorker(int nType, const char* pPayload, void* pData);
     /// Implementation of the callback worder handler, invoked by callbackWorker().
     void callbackWorkerImpl(int nType, const char* pPayload);
+    /// Command state (various buttons like bold are toggled or not) is changed.
+    void commandChanged(const std::string& rPayload);
 };
 
 LOKDocView_Impl::CallbackData::CallbackData(int nType, const std::string& rPayload, LOKDocView* pDocView)
@@ -941,7 +943,7 @@ gboolean LOKDocView_Impl::callbackImpl(CallbackData* pCallback)
     }
     case LOK_CALLBACK_STATE_CHANGED:
     {
-        g_info("%s", pCallback->m_aPayload.c_str());
+        commandChanged(pCallback->m_aPayload);
     }
     break;
     default:
@@ -971,11 +973,17 @@ void LOKDocView_Impl::callbackWorkerImpl(int nType, const char* pPayload)
 enum
 {
     EDIT_CHANGED,
+    COMMAND_CHANGED,
     LAST_SIGNAL
 };
 
 static guint docview_signals[LAST_SIGNAL] = { 0 };
 
+void LOKDocView_Impl::commandChanged(const std::string& rString)
+{
+    g_signal_emit(m_pDocView, docview_signals[COMMAND_CHANGED], 0, rString.c_str());
+}
+
 static void lok_docview_class_init( gpointer ptr )
 {
     LOKDocViewClass* pClass = static_cast<LOKDocViewClass *>(ptr);
@@ -990,6 +998,16 @@ static void lok_docview_class_init( gpointer ptr )
                      g_cclosure_marshal_VOID__BOOLEAN,
                      G_TYPE_NONE, 1,
                      G_TYPE_BOOLEAN);
+    pClass->command_changed = NULL;
+    docview_signals[COMMAND_CHANGED] =
+        g_signal_new("command-changed",
+                     G_TYPE_FROM_CLASS(gobject_class),
+                     G_SIGNAL_RUN_FIRST,
+                     G_STRUCT_OFFSET(LOKDocViewClass, command_changed),
+                     NULL, NULL,
+                     g_cclosure_marshal_VOID__STRING,
+                     G_TYPE_NONE, 1,
+                     G_TYPE_STRING);
 }
 
 static void lok_docview_init( GTypeInstance* pInstance, gpointer )