Bug 73874 -- sample plugin (4.x scriptability), not part of the build, r=peterl

modules/plugin/samples/4x-scriptable/plugin.cpp

@@ -0,0 +1,163 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+
+//////////////////////////////////////////////////
+//
+// CPlugin class implementation
+//
+#ifdef XP_WIN
+#include <windows.h>
+#include <windowsx.h>
+#endif
+
+#include "plugin.h"
+
+CPlugin::CPlugin(NPP pNPInstance) :
+  m_pNPInstance(pNPInstance),
+  m_pNPStream(NULL),
+  m_bInitialized(FALSE),
+  m_pScriptablePeer(NULL)
+{
+#ifdef XP_WIN
+  m_hWnd = NULL;
+#endif
+
+  m_String[0] = '\0';
+}
+
+CPlugin::~CPlugin()
+{
+  NS_IF_RELEASE(m_pScriptablePeer);
+}
+
+#ifdef XP_WIN
+static LRESULT CALLBACK PluginWinProc(HWND, UINT, WPARAM, LPARAM);
+static WNDPROC lpOldProc = NULL;
+#endif
+
+BOOL CPlugin::init(NPWindow* pNPWindow)
+{
+  if(pNPWindow == NULL)
+    return FALSE;
+
+#ifdef XP_WIN
+  m_hWnd = (HWND)pNPWindow->window;
+  if(m_hWnd == NULL)
+    return FALSE;
+
+  // subclass window so we can intercept window messages and
+  // do our drawing to it
+  lpOldProc = SubclassWindow(m_hWnd, (WNDPROC)PluginWinProc);
+
+  // associate window with our CPlugin object so we can access 
+  // it in the window procedure
+  SetWindowLong(m_hWnd, GWL_USERDATA, (LONG)this);
+#endif
+
+  m_bInitialized = TRUE;
+  return TRUE;
+}
+
+void CPlugin::shut()
+{
+#ifdef XP_WIN
+  // subclass it back
+  SubclassWindow(m_hWnd, lpOldProc);
+  m_hWnd = NULL;
+#endif
+
+  m_bInitialized = FALSE;
+}
+
+BOOL CPlugin::isInitialized()
+{
+  return m_bInitialized;
+}
+
+// this will force to draw a version string in the plugin window
+void CPlugin::showVersion()
+{
+  const char *ua = NPN_UserAgent(m_pNPInstance);
+  strcpy(m_String, ua);
+
+#ifdef XP_WIN
+  InvalidateRect(m_hWnd, NULL, TRUE);
+  UpdateWindow(m_hWnd);
+#endif
+}
+
+// this will clean the plugin window
+void CPlugin::clear()
+{
+  strcpy(m_String, "");
+
+#ifdef XP_WIN
+  InvalidateRect(m_hWnd, NULL, TRUE);
+  UpdateWindow(m_hWnd);
+#endif
+}
+
+// ==============================
+// ! Scriptability related code !
+// ==============================
+//
+// this method will return the scriptable object (and create it if necessary)
+nsI4xScrPlugin* CPlugin::getScriptablePeer()
+{
+  if (!m_pScriptablePeer) {
+    m_pScriptablePeer = new nsScriptablePeer(this);
+    if(!m_pScriptablePeer)
+      return NULL;
+
+    NS_ADDREF(m_pScriptablePeer);
+  }
+
+  // add reference for the caller requesting the object
+  NS_ADDREF(m_pScriptablePeer);
+  return m_pScriptablePeer;
+}
+
+#ifdef XP_WIN
+static LRESULT CALLBACK PluginWinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
+{
+  switch (msg) {
+    case WM_PAINT:
+      {
+        // draw a frame and display the string
+        PAINTSTRUCT ps;
+        HDC hdc = BeginPaint(hWnd, &ps);
+        RECT rc;
+        GetClientRect(hWnd, &rc);
+        FrameRect(hdc, &rc, GetStockBrush(BLACK_BRUSH));
+        CPlugin * p = (CPlugin *)GetWindowLong(hWnd, GWL_USERDATA);
+        if(p)
+          DrawText(hdc, p->m_String, strlen(p->m_String), &rc, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
+        EndPaint(hWnd, &ps);
+      }
+      break;
+    default:
+      break;
+  }
+
+  return DefWindowProc(hWnd, msg, wParam, lParam);
+}
+#endif