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gdkkeys-win32: Fix crash when keyboard DLL failed to load
DLL loading failures should not happen under normal circumstances, but we should at least try not to crash and and print better diagnostic messages if they do happen. See https://gitlab.gnome.org/GNOME/gtk/-/issues/4610
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82f8f878bc
commit
438fad803e
@ -180,7 +180,8 @@ keystate_to_modbits (GdkWin32KeymapLayoutInfo *info,
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BYTE result = 0;
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int i;
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g_return_val_if_fail (tables != NULL, 0);
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if (tables == NULL)
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return 0;
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vk_to_bit = tables->pCharModifiers.ptr->pVkToBit.ptr;
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@ -198,7 +199,8 @@ modbits_to_level (GdkWin32KeymapLayoutInfo *info,
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PKBDTABLES tables = (PKBDTABLES) info->tables;
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PMODIFIERS modifiers;
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g_return_val_if_fail (tables != NULL, 0);
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if (tables == NULL)
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return 0;
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modifiers = tables->pCharModifiers.ptr;
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if (modbits > modifiers->wMaxModBits)
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@ -268,7 +270,8 @@ vk_to_char_fuzzy (GdkWin32KeymapLayoutInfo *info,
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if (is_dead)
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*is_dead = FALSE;
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g_return_val_if_fail (tables != NULL, WCH_NONE);
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if (tables == NULL)
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return WCH_NONE;
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wch_tables = tables->pVkToWcharTable.ptr;
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@ -181,6 +181,7 @@ get_keyboard_layout_file (const char *layout_name)
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DWORD file_name_len = 0;
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int dir_len = 0;
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int buf_len = 0;
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LSTATUS status;
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static const char prefix[] = "SYSTEM\\CurrentControlSet\\Control\\"
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"Keyboard Layouts\\";
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@ -189,18 +190,32 @@ get_keyboard_layout_file (const char *layout_name)
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g_snprintf (kbdKeyPath, sizeof (prefix) + KL_NAMELENGTH, "%s%s", prefix,
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layout_name);
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if (RegOpenKeyExA (HKEY_LOCAL_MACHINE, (LPCSTR) kbdKeyPath, 0,
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KEY_QUERY_VALUE, &hkey) != ERROR_SUCCESS)
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goto fail1;
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status = RegOpenKeyExA (HKEY_LOCAL_MACHINE, (LPCSTR) kbdKeyPath, 0,
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KEY_QUERY_VALUE, &hkey);
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if (status != ERROR_SUCCESS)
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{
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g_warning("Could not open registry key '%s'. Error code: %d",
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kbdKeyPath, (int)status);
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goto fail1;
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}
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/* Get sizes */
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if (RegQueryValueExA (hkey, "Layout File", 0, &var_type, 0,
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&file_name_len) != ERROR_SUCCESS)
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goto fail2;
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status = RegQueryValueExA (hkey, "Layout File", 0, &var_type, 0,
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&file_name_len);
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if (status != ERROR_SUCCESS)
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{
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g_warning("Could not query registry key '%s\\Layout File'. Error code: %d",
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kbdKeyPath, (int)status);
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goto fail2;
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}
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dir_len = GetSystemDirectoryA (0, 0); /* includes \0 */
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if (dir_len == 0)
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goto fail2;
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{
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g_warning("GetSystemDirectoryA failed. Error: %d", (int)GetLastError());
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goto fail2;
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}
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/* Allocate buffer */
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buf_len = dir_len + (int) strlen ("\\") + file_name_len;
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@ -214,10 +229,12 @@ get_keyboard_layout_file (const char *layout_name)
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result[dir_len - 1] = '\\';
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/* Append file name */
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if (RegQueryValueExA (hkey, "Layout File", 0, &var_type,
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(LPBYTE) &result[dir_len], &file_name_len)
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!= ERROR_SUCCESS)
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goto fail3;
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status = RegQueryValueExA (hkey, "Layout File", 0, &var_type,
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(LPBYTE) &result[dir_len], &file_name_len);
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if (status != ERROR_SUCCESS)
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{
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goto fail3;
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}
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result[dir_len + file_name_len] = '\0';
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@ -415,6 +432,9 @@ gdk_keysym_to_key_entry_index (GdkWin32KeymapLayoutInfo *info,
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gunichar c;
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gintptr index;
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if (info->reverse_lookup_table == NULL)
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return -1;
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/* Special cases */
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if (sym == GDK_KEY_Tab)
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return VK_TAB;
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@ -439,8 +459,6 @@ gdk_keysym_to_key_entry_index (GdkWin32KeymapLayoutInfo *info,
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/* Try converting to Unicode and back */
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c = gdk_keyval_to_unicode (sym);
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g_return_val_if_fail (info->reverse_lookup_table != NULL, -1);
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index = -1;
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if (g_hash_table_lookup_extended (info->reverse_lookup_table,
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GINT_TO_POINTER (c),
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@ -537,7 +555,7 @@ update_keymap (GdkWin32Keymap *keymap)
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info->file = get_keyboard_layout_file (info->name);
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if (load_layout_dll (keymap, info->file, info))
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if (info->file != NULL && load_layout_dll (keymap, info->file, info))
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{
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info->key_entries = g_array_new (FALSE, FALSE,
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sizeof (GdkWin32KeymapKeyEntry));
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@ -546,6 +564,11 @@ update_keymap (GdkWin32Keymap *keymap)
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g_direct_equal);
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init_vk_lookup_table (keymap, info);
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}
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else
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{
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g_warning("Failed to load keyboard layout DLL for layout %s: %s",
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info->name, info->file);
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}
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}
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if (info->handle == current_layout)
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@ -978,6 +1001,13 @@ gdk_win32_keymap_translate_keyboard_state (GdkKeymap *gdk_keymap,
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if (consumed_modifiers)
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*consumed_modifiers = mod_bits_to_gdk_mod_mask (consumed_mod_bits);
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/* Just a diagnostic message to inform the user why their keypresses aren't working.
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* Shouldn't happen under normal circumstances. */
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if (tmp_keyval == GDK_KEY_VoidSymbol && layout_info->tables == NULL)
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g_warning("Failed to translate keypress (keycode: %u) for group %d (%s) because "
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"we could not load the layout.",
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hardware_keycode, group, layout_info->name);
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return tmp_keyval != GDK_KEY_VoidSymbol;
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}
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