Fix wxLaunchDefaultBrowser on wxMSW for local files/directories: the bug could be reproduced using "Open screenshots folder" menu item in screenshotgen application.

Move platform-specific code in platform-specific utils source files.
Perform safer URL scheme check.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57934 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/utilsunx.cpp

@@ -434,6 +434,87 @@ private:
 
 } // anonymous namespace
 
+// these functions are in src/osx/carbon/utils.cpp for wxMac
+#ifndef __WXMAC__
+
+// ----------------------------------------------------------------------------
+// Launch document with default app
+// ----------------------------------------------------------------------------
+
+bool wxLaunchDefaultApplication(const wxString& document, int flags)
+{
+    wxUnusedVar(flags);
+
+    // Our best best is to use xdg-open from freedesktop.org cross-desktop
+    // compatibility suite xdg-utils
+    // (see http://portland.freedesktop.org/wiki/) -- this is installed on
+    // most modern distributions and may be tweaked by them to handle
+    // distribution specifics.
+    wxString path, xdg_open;
+    if ( wxGetEnv("PATH", &path) &&
+         wxFindFileInPath(&xdg_open, path, "xdg-open") )
+    {
+        if ( wxExecute(xdg_open + " " + document) )
+            return true;
+    }
+
+    return false;
+}
+
+// ----------------------------------------------------------------------------
+// Launch default browser
+// ----------------------------------------------------------------------------
+
+bool wxDoLaunchDefaultBrowser(const wxString& url, int flags)
+{
+    wxUnusedVar(flags);
+
+    // Our best best is to use xdg-open from freedesktop.org cross-desktop
+    // compatibility suite xdg-utils
+    // (see http://portland.freedesktop.org/wiki/) -- this is installed on
+    // most modern distributions and may be tweaked by them to handle
+    // distribution specifics. Only if that fails, try to find the right
+    // browser ourselves.
+    wxString path, xdg_open;
+    if ( wxGetEnv("PATH", &path) &&
+         wxFindFileInPath(&xdg_open, path, "xdg-open") )
+    {
+        if ( wxExecute(xdg_open + " " + url) )
+            return true;
+    }
+
+    wxString desktop = wxTheApp->GetTraits()->GetDesktopEnvironment();
+
+    // GNOME and KDE desktops have some applications which should be always installed
+    // together with their main parts, which give us the
+    if (desktop == wxT("GNOME"))
+    {
+        wxArrayString errors;
+        wxArrayString output;
+
+        // gconf will tell us the path of the application to use as browser
+        long res = wxExecute( wxT("gconftool-2 --get /desktop/gnome/applications/browser/exec"),
+                              output, errors, wxEXEC_NODISABLE );
+        if (res >= 0 && errors.GetCount() == 0)
+        {
+            wxString cmd = output[0];
+            cmd << _T(' ') << url;
+            if (wxExecute(cmd))
+                return true;
+        }
+    }
+    else if (desktop == wxT("KDE"))
+    {
+        // kfmclient directly opens the given URL
+        if (wxExecute(wxT("kfmclient openURL ") + url))
+            return true;
+    }
+
+    return false;
+}
+
+#endif  // __WXMAC__
+
 // ----------------------------------------------------------------------------
 // wxExecute implementations
 // ----------------------------------------------------------------------------
@@ -871,7 +952,7 @@ bool wxIsPlatform64Bit()
                 machine.Contains(wxT("alpha"));
 }
 
-// these functions are in mac/utils.cpp for wxMac
+// these functions are in src/osx/utilsexc_base.cpp for wxMac
 #ifndef __WXMAC__
 
 wxOperatingSystemId wxGetOsVersion(int *verMaj, int *verMin)