Fixed inability to select no superscript and no subscript in wxRichTextCtrl's

[wxWidgets.git] / src / msw / utilsexc.cpp

diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp
index a675969f7e421166efbc93912afdb55eac0e66dc..f67e0eb11d9cf3024b5b7e6f2c9f2f5c1b200dd1 100644 (file)
--- a/src/msw/utilsexc.cpp
+++ b/src/msw/utilsexc.cpp
@@ -433,8 +433,19 @@ wxPipeInputStream::~wxPipeInputStream()
 
 bool wxPipeInputStream::CanRead() const
 {
+    // we can read if there's something in the put back buffer
+    // even pipe is closed
+    if ( m_wbacksize > m_wbackcur )
+        return true;
+
+    wxPipeInputStream * const self = wxConstCast(this, wxPipeInputStream);
+
     if ( !IsOpened() )
+    {
+        // set back to mark Eof as it may have been unset by Ungetch()
+        self->m_lasterror = wxSTREAM_EOF;
         return false;
+    }
 
     DWORD nAvailable;
 
@@ -460,8 +471,6 @@ bool wxPipeInputStream::CanRead() const
         // it had been closed
         ::CloseHandle(m_hInput);
 
-        wxPipeInputStream *self = wxConstCast(this, wxPipeInputStream);
-
         self->m_hInput = INVALID_HANDLE_VALUE;
         self->m_lasterror = wxSTREAM_EOF;
 
@@ -987,13 +996,13 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler)
     while ( data->state )
     {
 #if wxUSE_STREAMS && !defined(__WXWINCE__)
-        bufOut.Update();
-        bufErr.Update();
+        if ( !bufOut.Update() && !bufErr.Update() )
 #endif // wxUSE_STREAMS
-
-        // don't eat 100% of the CPU -- ugly but anything else requires
-        // real async IO which we don't have for the moment
-        ::Sleep(50);
+        {
+            // don't eat 100% of the CPU -- ugly but anything else requires
+            // real async IO which we don't have for the moment
+            ::Sleep(50);
+        }
 
         // we must process messages or we'd never get wxWM_PROC_TERMINATED
         traits->AlwaysYield();
@@ -1012,18 +1021,59 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler)
     return dwExitCode;
 }
 
-long wxExecute(wxChar **argv, int flags, wxProcess *handler)
+template <typename CharType>
+long wxExecuteImpl(CharType **argv, int flags, wxProcess *handler)
 {
     wxString command;
+    command.reserve(1024);
 
+    wxString arg;
     for ( ;; )
     {
-        command += *argv++;
+        arg = *argv++;
+
+        bool quote;
+        if ( arg.empty() )
+        {
+            // we need to quote empty arguments, otherwise they'd just
+            // disappear
+            quote = true;
+        }
+        else // non-empty
+        {
+            // escape any quotes present in the string to avoid interfering
+            // with the command line parsing in the child process
+            arg.Replace("\"", "\\\"", true /* replace all */);
+
+            // and quote any arguments containing the spaces to prevent them from
+            // being broken down
+            quote = arg.find_first_of(" \t") != wxString::npos;
+        }
+
+        if ( quote )
+            command += '\"' + arg + '\"';
+        else
+            command += arg;
+
         if ( !*argv )
             break;
 
-        command += _T(' ');
+        command += ' ';
     }
 
     return wxExecute(command, flags, handler);
 }
+
+long wxExecute(char **argv, int flags, wxProcess *handler)
+{
+    return wxExecuteImpl(argv, flags, handler);
+}
+
+#if wxUSE_UNICODE
+
+long wxExecute(wchar_t **argv, int flags, wxProcess *handler)
+{
+    return wxExecuteImpl(argv, flags, handler);
+}
+
+#endif // wxUSE_UNICODE