browser-plugin: add clipboard copy support

Only supporting copy, evince doesn't support editing (at least the API
is lacking cut and paste)

Using property access workaround.

Example:
    if (plugin.canCopy) {
        plugin.canCopy = 42;	(workaround) copy selection to clipboard
    }

4 files changed, 46 insertions, 1 deletions

diff --git a/browser-plugin/plugin.cpp b/browser-plugin/plugin.cpp
index 7d79100..88893c8 100644
--- a/browser-plugin/plugin.cpp
+++ b/browser-plugin/plugin.cpp
@@ -27,7 +27,8 @@ Plugin::Plugin (NPP instance) : mInstance (instance),
 				mScriptableObject (0),
 				mWindow (0),
 				mLoadJob (0),
-				mTitle (0)
+				mTitle (0),
+				mHasSelection (false)
 {
 	mScrolledWindow = gtk_scrolled_window_new (NULL, NULL);
 
@@ -36,6 +37,10 @@ Plugin::Plugin (NPP instance) : mInstance (instance),
 			  "notify::sizing-mode",
 			  G_CALLBACK (Plugin::SizingModeCallback),
 			  reinterpret_cast<void*>(this));
+	g_signal_connect (G_OBJECT (mView),
+			  "notify::has-selection",
+			  G_CALLBACK (Plugin::HasSelectionCallback),
+			  reinterpret_cast<void*>(this));
 
 	g_signal_connect (G_OBJECT (mView),
 			  "external-link",
@@ -103,6 +108,12 @@ Plugin::FindPrevious (const char *text)
 }
 
 void
+Plugin::CopyClipboard ()
+{
+	ev_view_copy (EV_VIEW (mView));
+}
+
+void
 Plugin::SetWindow (GdkNativeWindow window)
 {
 	if (mWindow != 0) {
@@ -226,6 +237,19 @@ Plugin::SizingModeCallback (EvView *view, GParamSpec *pspec, gpointer data)
 }
 
 void
+Plugin::HasSelectionCallback (EvView *view, GParamSpec *pspec, gpointer data)
+{
+	Plugin *plugin = reinterpret_cast<Plugin*> (data);
+
+	gboolean has_selection = ev_view_get_has_selection (view);
+
+	if (has_selection != plugin->mHasSelection) {
+		plugin->mHasSelection = has_selection;
+		plugin->CallBrowser ("onClipboardChanged");
+	}
+}
+
+void
 Plugin::ExternalLinkCallback (EvView *view, EvLinkAction *action, gpointer data)
 {
 	Plugin *plugin = reinterpret_cast<Plugin*> (data);
diff --git a/browser-plugin/plugin.h b/browser-plugin/plugin.h
index 7ea940e..7da0aa3 100644
--- a/browser-plugin/plugin.h
+++ b/browser-plugin/plugin.h
@@ -39,6 +39,7 @@ class Plugin {
 		void SetZoom (double);
 		void FindNext (const char *text);
 		void FindPrevious (const char *text);
+		void CopyClipboard ();
 		void ShowLoadingError ();
 		NPObject *GetScriptableNPObject ();
 
@@ -51,6 +52,9 @@ class Plugin {
 		static void SizingModeCallback (EvView *view,
 						GParamSpec *pspec,
 						gpointer data);
+		static void HasSelectionCallback (EvView *view,
+						  GParamSpec *pspec,
+						  gpointer data);
 		static void ExternalLinkCallback (EvView *view,
 						  EvLinkAction *action,
 						  gpointer data);
@@ -66,6 +70,7 @@ class Plugin {
 
 	public:
 		char *mTitle;
+		bool  mHasSelection;
 };
 
 void* NPN_MemDup (const void *aMem, uint32 aLen);
diff --git a/browser-plugin/scriptable.cpp b/browser-plugin/scriptable.cpp
index e8fbcb2..81caeb0 100644
--- a/browser-plugin/scriptable.cpp
+++ b/browser-plugin/scriptable.cpp
@@ -198,6 +198,7 @@ ScriptablePluginObject::ScriptablePluginObject (NPP npp) :
 {
 	mTitleID = NPN_GetStringIdentifier ("title");
 	mZoomID = NPN_GetStringIdentifier ("zoom");
+	mCanCopyID = NPN_GetStringIdentifier ("canCopy");
 	mMagicWrapperID = NPN_GetStringIdentifier ("magicWrapper");
 
 	mZoomInID = NPN_GetStringIdentifier ("zoomIn");
@@ -231,6 +232,7 @@ ScriptablePluginObject::HasProperty (NPIdentifier name)
 	NPIdentifier properties[] = {
 		mTitleID,
 		mZoomID,
+		mCanCopyID,
 		mMagicWrapperID
 	};
 
@@ -261,6 +263,9 @@ ScriptablePluginObject::GetProperty (NPIdentifier name, NPVariant *result)
 	} else if (name == mZoomID) {
 		DOUBLE_TO_NPVARIANT (plugin->GetZoom(), *result);
 		return true;
+	} else if (name == mCanCopyID) {
+		BOOLEAN_TO_NPVARIANT (plugin->mHasSelection, *result);
+		return true;
 	}
 
 	return false;
@@ -310,6 +315,16 @@ ScriptablePluginObject::SetProperty (NPIdentifier name, const NPVariant *value)
 
 		plugin->SetZoom (zoom);
 		return true;
+	} else if (name == mCanCopyID) {
+		// FIXME fix method calls (using write access to a property as
+		// an awful workaround)
+		if (!plugin->mHasSelection) {
+			NPN_SetException (this, "Nothing to copy");
+			return false;
+		}
+
+		plugin->CopyClipboard ();
+		return true;
 	}
 
 	return false;
diff --git a/browser-plugin/scriptable.h b/browser-plugin/scriptable.h
index cc6ac1c..763ead2 100644
--- a/browser-plugin/scriptable.h
+++ b/browser-plugin/scriptable.h
@@ -94,6 +94,7 @@ class ScriptablePluginObject : public ScriptablePluginObjectBase
 	private:
 		NPIdentifier mTitleID;
 		NPIdentifier mZoomID;
+		NPIdentifier mCanCopyID;
 		NPIdentifier mMagicWrapperID;
 
 		NPIdentifier mZoomInID;