added helper function for panel text

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401367

core/MenuStyle_Radio.cpp

@@ -361,6 +361,16 @@ void CRadioDisplay::SendRawDisplay(int client, unsigned int time)
 	}
 }
 
+int CRadioDisplay::GetAmountRemaining()
+{
+	size_t amt = m_Title.size() + 1 + m_BufferText.size();
+	if (amt >= 511)
+	{
+		return 0;
+	}
+	return (int)(511 - amt);
+}
+
 void CRadioDisplay::DeleteThis()
 {
 	delete this;

core/MenuStyle_Radio.h

@@ -99,6 +99,7 @@ public: //IMenuPanel
 	bool SetSelectableKeys(unsigned int keymap);
 	unsigned int GetCurrentKey();
 	bool SetCurrentKey(unsigned int key);
+	int GetAmountRemaining();
 private:
 	String m_BufferText;
 	String m_Title;

core/MenuStyle_Valve.cpp

@@ -342,6 +342,12 @@ bool CValveMenuDisplay::SetSelectableKeys(unsigned int keymap)
 	return false;
 }
 
+int CValveMenuDisplay::GetAmountRemaining()
+{
+	/* :TODO: this is a lie, but nothing really seems meaningful... */
+	return -1;
+}
+
 CValveMenu::CValveMenu(IMenuHandler *pHandler, IdentityToken_t *pOwner) : 
 CBaseMenu(pHandler, &g_ValveMenuStyle, pOwner), 
 	m_IntroColor(255, 0, 0, 255)

core/MenuStyle_Valve.h

@@ -102,6 +102,7 @@ public:
 	bool SetSelectableKeys(unsigned int keymap);
 	unsigned int GetCurrentKey();
 	bool SetCurrentKey(unsigned int key);
+	int GetAmountRemaining();
 private:
 	KeyValues *m_pKv;
 	unsigned int m_NextPos;

core/smn_menus.cpp

@@ -1217,6 +1217,20 @@ static cell_t GetPanelCurrentKey(IPluginContext *pContext, const cell_t *params)
 	return panel->GetCurrentKey();
 }
 
+static cell_t GetPanelTextRemaining(IPluginContext *pContext, const cell_t *params)
+{
+	Handle_t hndl = (Handle_t)params[1];
+	HandleError err;
+	IMenuPanel *panel;
+
+	if ((err=ReadPanelHandle(hndl, &panel)) != HandleError_None)
+	{
+		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);
+	}
+
+	return panel->GetAmountRemaining();
+}
+
 static cell_t SetPanelCurrentKey(IPluginContext *pContext, const cell_t *params)
 {
 	Handle_t hndl = (Handle_t)params[1];
@@ -1355,6 +1369,7 @@ REGISTER_NATIVES(menuNatives)
 	{"GetMenuStyle",			GetMenuStyle},
 	{"GetMenuStyleHandle",		GetMenuStyleHandle},
 	{"GetMenuTitle",			GetMenuTitle},
+	{"GetPanelTextRemaining",	GetPanelTextRemaining},
 	{"GetPanelCurrentKey",		GetPanelCurrentKey},
 	{"GetPanelStyle",			GetPanelStyle},
 	{"InsertMenuItem",			InsertMenuItem},

plugins/include/menus.inc

@@ -644,6 +644,20 @@ native bool:SetPanelKeys(Handle:panel, keys);
  */
 native bool:SendPanelToClient(Handle:panel, client, MenuHandler:handler, time);
 
+/**
+ * @brief Returns the amount of text the menu can still hold.  If this is 
+ * limit is reached or overflowed, the text is silently truncated.  
+ *
+ * Radio menus: Currently 511 characters (512 bytes).
+ * Valve menus: Currently -1 (no meaning).
+ *
+ * @param panel			A MenuPanel Handle.
+ * @return				Number of characters that the menu can still hold, 
+ *						or -1 if there is no known limit.
+ * @error				Invalid Handle.
+ */
+native GetPanelTextRemaining(Handle:panel);
+
 /**
  * @brief Returns the current key position.
  *

public/IMenuManager.h

@@ -36,7 +36,7 @@
 #include <IHandleSys.h>
 
 #define SMINTERFACE_MENUMANAGER_NAME		"IMenuManager"
-#define SMINTERFACE_MENUMANAGER_VERSION		11
+#define SMINTERFACE_MENUMANAGER_VERSION		12
 
 /**
  * @file IMenuManager.h
@@ -312,6 +312,16 @@ namespace SourceMod
 		 * @return				True on success, false otherwise.
 		 */
 		virtual bool SetCurrentKey(unsigned int key) =0;
+
+		/**
+		 * @brief Returns the number of characters that can be added to the 
+		 * menu.  The internal buffer is truncated if overflowed; this is for 
+		 * manual truncation/wrapping purposes.
+		 *
+		 * @return				Number of bytes available.  If the result is 
+		 *						-1, then the panel has no text limit.
+		 */
+		virtual int GetAmountRemaining() =0;
 	};
 
 	/**