Use both URL-specific and plain text formats in wxGTK wxURLDataObject.

Just as in wxMSW, it makes sense to put URLs on clipboard (or drag them) in
both URL-specific and plain text formats to facilitate pasting (or dropping)
them into other applications.

So make wxURLDataObject in wxGTK a composite data object containing both its
old data object and wxTextDataObject.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72161 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/dataobj2.h

@@ -93,34 +93,19 @@ public:
 // wxURLDataObject is a specialization of wxDataObject for URLs
 // ----------------------------------------------------------------------------
 
-class WXDLLIMPEXP_CORE wxURLDataObject : public wxDataObjectSimple
+class WXDLLIMPEXP_CORE wxURLDataObject : public wxDataObjectComposite
 {
 public:
     wxURLDataObject(const wxString& url = wxEmptyString);
 
-    wxString GetURL() const { return m_url; }
-    void SetURL(const wxString& url) { m_url = url; }
-
-    virtual size_t GetDataSize() const;
-    virtual bool GetDataHere(void *buf) const;
-    virtual bool SetData(size_t len, const void *buf);
-
-    // Must provide overloads to avoid hiding them (and warnings about it)
-    virtual size_t GetDataSize(const wxDataFormat&) const
-    {
-        return GetDataSize();
-    }
-    virtual bool GetDataHere(const wxDataFormat&, void *buf) const
-    {
-        return GetDataHere(buf);
-    }
-    virtual bool SetData(const wxDataFormat&, size_t len, const void *buf)
-    {
-        return SetData(len, buf);
-    }
+    wxString GetURL() const;
+    void SetURL(const wxString& url);
 
 private:
-    wxString m_url;
+    class wxTextURIListDataObject* const m_dobjURIList;
+    wxTextDataObject* const m_dobjText;
+
+    wxDECLARE_NO_COPY_CLASS(wxURLDataObject);
 };
 
 

src/gtk/dataobj.cpp

@@ -420,30 +420,101 @@ void wxBitmapDataObject::DoConvertToPng()
 // wxURLDataObject
 // ----------------------------------------------------------------------------
 
+class wxTextURIListDataObject : public wxDataObjectSimple
+{
+public:
+    wxTextURIListDataObject(const wxString& url)
+        : wxDataObjectSimple(wxDataFormat(g_fileAtom)),
+          m_url(url)
+    {
+    }
+
+    const wxString& GetURL() const { return m_url; }
+    void SetURL(const wxString& url) { m_url = url; }
+
+
+    virtual size_t GetDataSize() const
+    {
+        // It is not totally clear whether we should include "\r\n" at the end
+        // of the string if there is only one URL or not, but not doing it
+        // doesn't seem to create any problems, so keep things simple.
+        return strlen(m_url.utf8_str()) + 1;
+    }
+
+    virtual bool GetDataHere(void *buf) const
+    {
+        char* const dst = static_cast<char*>(buf);
+
+        strcpy(dst, m_url.utf8_str());
+
+        return true;
+    }
+
+    virtual bool SetData(size_t len, const void *buf)
+    {
+        const char* const src = static_cast<const char*>(buf);
+
+        // The string might be "\r\n"-terminated but this is not necessarily
+        // the case (e.g. when dragging an URL from Firefox, it isn't).
+        if ( len > 1 && src[len - 1] == '\n' )
+        {
+            if ( len > 2 && src[len - 2] == '\r' )
+                len--;
+
+            len--;
+        }
+
+        m_url = wxString::FromUTF8(src, len);
+
+        return true;
+    }
+
+    // Must provide overloads to avoid hiding them (and warnings about it)
+    virtual size_t GetDataSize(const wxDataFormat&) const
+    {
+        return GetDataSize();
+    }
+    virtual bool GetDataHere(const wxDataFormat&, void *buf) const
+    {
+        return GetDataHere(buf);
+    }
+    virtual bool SetData(const wxDataFormat&, size_t len, const void *buf)
+    {
+        return SetData(len, buf);
+    }
+
+private:
+    wxString m_url;
+};
+
 wxURLDataObject::wxURLDataObject(const wxString& url) :
-   wxDataObjectSimple( wxDataFormat( g_fileAtom ) )
+    m_dobjURIList(new wxTextURIListDataObject(url)),
+    m_dobjText(new wxTextDataObject(url))
 {
-   m_url = url;
+    // Use both URL-specific format and a plain text one to ensure that URLs
+    // can be pasted into any application.
+    Add(m_dobjURIList, true /* preferred */);
+    Add(m_dobjText);
 }
 
-size_t wxURLDataObject::GetDataSize() const
+void wxURLDataObject::SetURL(const wxString& url)
 {
-    return strlen(m_url.utf8_str()) + 1;
+    m_dobjURIList->SetURL(url);
+    m_dobjText->SetText(url);
 }
 
-bool wxURLDataObject::GetDataHere(void *buf) const
+wxString wxURLDataObject::GetURL() const
 {
-    strcpy(static_cast<char*>(buf), m_url.utf8_str());
-
-    return true;
+    if ( GetReceivedFormat() == g_fileAtom )
+    {
+        // If we received the URL as an URI, use it.
+        return m_dobjURIList->GetURL();
+    }
+    else // Otherwise we either got it as text or didn't get anything yet.
+    {
+        // In either case using the text format should be fine.
+        return m_dobjText->GetText();
+    }
 }
 
-bool wxURLDataObject::SetData(size_t len, const void *buf)
-{
-    m_url = wxString::FromUTF8(static_cast<const char*>(buf), len);
-
-    return true;
-}
-
-
 #endif // wxUSE_DATAOBJ