/[gpgoe]/trunk/src/GPGOE.c
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Diff of /trunk/src/GPGOE.c

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revision 12 by twoaday, Fri Apr 7 10:46:41 2006 UTC revision 18 by twoaday, Thu Apr 13 07:41:30 2006 UTC
# Line 27  Line 27 
27  #include "gpgme.h"  #include "gpgme.h"
28  #include "GPGOE.h"  #include "GPGOE.h"
29    
   
30  /* Global DLL module handle. */  /* Global DLL module handle. */
31  HINSTANCE mod_hinst_dll;  HINSTANCE mod_hinst_dll;
32    
33    /* Outlook Express old window procedure. */
34    WNDPROC oe_proc_old;
35    
36  /* DLL hook handle for the CBT function. */  /* DLL hook handle for the CBT function. */
37  static HHOOK ctb_hook = NULL;  static HHOOK ctb_hook = NULL;
38    
39  /* Outlook Express window handle. */  /* Outlook Express window handle. */
40  static HWND oe_hwnd = NULL;  static HWND oe_hwnd = NULL;
41    
42  /* Outlook Express old window procedure. */  /* We need a shared section to define variables which
43  WNDPROC oe_proc_old;     will keep their values in all address spaces. */
44    #ifdef __GNUC__
45    #define ATTR_SEC __attribute__((section (".SHARDAT"), shared))
46    #else
47    #define ATTR_SEC
48    #pragma data_seg(".SHARDAT")
49    #endif
50    static int gpgoe_active_modes ATTR_SEC = 0;
51    #ifndef __GNUC__
52    #pragma data_seg()
53    #endif
54    #undef ATTR_SEC
55    
56    
57    /* Supported plug-in modes. */
58    enum gpgoe_mode_t {
59        GPGOE_MODE_NORMAL     = 0,
60        GPGOE_MODE_PLAINREPLY = 1      /* decrypt mails before a reply. */
61    };
62    
63    
64  /* Main DLL entry point. */  /* Main DLL entry point. */
# Line 66  DllMain (HINSTANCE hinst_dll, DWORD reas Line 86  DllMain (HINSTANCE hinst_dll, DWORD reas
86    
87    
88  /* Quick and dirty check if the dialog is a common dialog  /* Quick and dirty check if the dialog is a common dialog
89     and the 'File Save' style. */     and the 'File {Open, Save}' style. */
90  static int  static int
91  is_filesave_dlg (HWND h)  is_common_file_dlg (HWND h)
92  {  {
93      HWND button = GetDlgItem (h, 1040);      HWND button = GetDlgItem (h, 1040);
94      char wclass[200];      char wclass[200];
# Line 82  is_filesave_dlg (HWND h) Line 102  is_filesave_dlg (HWND h)
102  }  }
103    
104    
105    
106  /* CTB hook procedure.  /* CTB hook procedure.
107     Monitors the creation of all windows and subclass the window     Monitors the creation of all windows and subclass the window
108     if it belongs to the Outlook Express message class. */     if it belongs to the Outlook Express (message) class. */
109  static LRESULT CALLBACK  static LRESULT CALLBACK
110  ctb_proc (int code, WPARAM wparam, LPARAM lparam)  ctb_proc (int code, WPARAM wparam, LPARAM lparam)
111  {  {
# Line 111  ctb_proc (int code, WPARAM wparam, LPARA Line 132  ctb_proc (int code, WPARAM wparam, LPARA
132              else              else
133                  oe_hwnd = hwnd;                  oe_hwnd = hwnd;
134          }          }
135    
136            if ((gpgoe_active_modes & GPGOE_MODE_PLAINREPLY) &&
137                !strcmp (wclass, "Outlook Express Browser Class")) {
138                oe_main_proc_old = (WNDPROC)GetWindowLong (hwnd, GWL_WNDPROC);
139                if (!oe_main_proc_old)
140                    show_error (NULL, "GPGOE", MB_ICONERROR|MB_OK,
141                                "Could not get window procedure ec=%d",
142                                (int)GetLastError ());
143                else if (!SetWindowLong (hwnd, GWL_WNDPROC, (LONG)(WNDPROC)oe_main_proc))
144                    show_error (NULL, "GPGOE", MB_ICONERROR|MB_OK,
145                                "Could not set window procedure: ec=%d",
146                                (int)GetLastError ());
147            }
148          break;          break;
149    
150  #if 0  #if 0
# Line 120  ctb_proc (int code, WPARAM wparam, LPARA Line 154  ctb_proc (int code, WPARAM wparam, LPARA
154              char wclass[200];              char wclass[200];
155    
156              if (GetClassName (hwnd, wclass, sizeof (wclass)-1) <= 0 ||              if (GetClassName (hwnd, wclass, sizeof (wclass)-1) <= 0 ||
157                  !strstr (wclass, "#32770") || !is_filesave_dlg (hwnd))                  !strstr (wclass, "#32770") || !is_common_file_dlg (hwnd))
158                  break;                  break;
159              of_proc_old = (WNDPROC)GetWindowLong (hwnd, GWL_WNDPROC);              of_proc_old = (WNDPROC)GetWindowLong (hwnd, GWL_WNDPROC);
160              SetWindowLong (hwnd, GWL_WNDPROC, (LONG)(WNDPROC)of_proc);              SetWindowLong (hwnd, GWL_WNDPROC, (LONG)(WNDPROC)of_proc);
161          }          }
162          break;          break;
163  #endif  #endif  
164      }        }  
165      return CallNextHookEx (ctb_hook, code, wparam, lparam);      return CallNextHookEx (ctb_hook, code, wparam, lparam);
166  }  }
167    
168    
169  /* Initialize the hooks.  /* Initialize the hooks; a named mutex prevents that the
170     To prevent double initialisation, we use a named mutex. */     initialisation is done twice.
171       Return value: 0 on success. */
172  int  int
173  gpgoe_initialize (void)  gpgoe_initialize (void)
174  {  {
# Line 145  gpgoe_initialize (void) Line 180  gpgoe_initialize (void)
180  }  }
181    
182    
183  /* Deinitialize the hooks and close all handles. */  /* Deinitialize the hooks and close all handles.
184       Return value: 0 on success. */
185  int  int
186  gpgoe_remove (void)  gpgoe_remove (void)
187  {  {
     int rc = 0;  
188      HANDLE hd;      HANDLE hd;
189        int rc;
190    
191      hd = CreateMutex (NULL, TRUE, "gpgoe");      hd = CreateMutex (NULL, TRUE, "gpgoe");
192      if (GetLastError() == ERROR_ALREADY_EXISTS) {      if (GetLastError() == ERROR_ALREADY_EXISTS) {
# Line 161  gpgoe_remove (void) Line 197  gpgoe_remove (void)
197      rc = UnhookWindowsHookEx (ctb_hook);      rc = UnhookWindowsHookEx (ctb_hook);
198      return rc ? 0 : (int)GetLastError ();      return rc ? 0 : (int)GetLastError ();
199  }  }
200    
201    
202    /* Change the active plug-in modes, enable mode @mode. */
203    void
204    gpgoe_set_active_modes (int mode)
205    {
206        gpgoe_active_modes = mode;
207    }
208    
209    
210    int
211    gpgoe_get_active_modes (void)
212    {
213        return gpgoe_active_modes;
214    }
215    
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