X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b0a6c154dec4a98e0a232196fd2b9ad1b02b6199..26022721e88892446ebcfc34bc34384492952fa9:/src/common/dobjcmn.cpp diff --git a/src/common/dobjcmn.cpp b/src/common/dobjcmn.cpp index 7faeca754c..9f6f29d84e 100644 --- a/src/common/dobjcmn.cpp +++ b/src/common/dobjcmn.cpp @@ -1,53 +1,43 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: common/dobjcmn.cpp +// Name: src/common/dobjcmn.cpp // Purpose: implementation of data object methods common to all platforms // Author: Vadim Zeitlin, Robert Roebling // Modified by: // Created: 19.10.99 // RCS-ID: $Id$ -// Copyright: (c) wxWindows Team -// Licence: wxWindows license +// Copyright: (c) wxWidgets Team +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// -// ============================================================================ -// declarations -// ============================================================================ - -// ---------------------------------------------------------------------------- -// headers -// ---------------------------------------------------------------------------- - -#ifdef __GNUG__ - #pragma implementation "dataobjbase.h" -#endif - +// For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif -#ifndef WX_PRECOMP - #include "wx/app.h" - #include "wx/debug.h" -#endif // WX_PRECOMP +#if wxUSE_DATAOBJ #include "wx/dataobj.h" +#ifndef WX_PRECOMP + #include "wx/app.h" +#endif + // ---------------------------------------------------------------------------- // lists // ---------------------------------------------------------------------------- #include "wx/listimpl.cpp" -WX_DEFINE_LIST(wxSimpleDataObjectList); +WX_DEFINE_LIST(wxSimpleDataObjectList) // ---------------------------------------------------------------------------- // globals // ---------------------------------------------------------------------------- static wxDataFormat dataFormatInvalid; -const wxDataFormat& wxFormatInvalid = dataFormatInvalid; +WXDLLEXPORT const wxDataFormat& wxFormatInvalid = dataFormatInvalid; // ============================================================================ // implementation @@ -61,64 +51,177 @@ wxDataObjectBase::~wxDataObjectBase() { } +bool wxDataObjectBase::IsSupported(const wxDataFormat& format, + Direction dir) const +{ + size_t nFormatCount = GetFormatCount( dir ); + if ( nFormatCount == 1 ) + { + return format == GetPreferredFormat( dir ); + } + else + { + wxDataFormat *formats = new wxDataFormat[nFormatCount]; + GetAllFormats( formats, dir ); + + size_t n; + for ( n = 0; n < nFormatCount; n++ ) + { + if ( formats[n] == format ) + break; + } + + delete [] formats; + + // found? + return n < nFormatCount; + } +} + // ---------------------------------------------------------------------------- // wxDataObjectComposite // ---------------------------------------------------------------------------- +wxDataObjectComposite::wxDataObjectComposite() +{ + m_preferred = 0; + m_receivedFormat = wxFormatInvalid; +} + +wxDataObjectComposite::~wxDataObjectComposite() +{ + WX_CLEAR_LIST( wxSimpleDataObjectList, m_dataObjects ); +} + wxDataObjectSimple * -wxDataObjectComposite::GetObject(const wxDataFormat& format) const +wxDataObjectComposite::GetObject(const wxDataFormat& format, wxDataObjectBase::Direction dir) const { - wxSimpleDataObjectList::Node *node = m_dataObjects.GetFirst(); + wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.GetFirst(); + while ( node ) { wxDataObjectSimple *dataObj = node->GetData(); - if ( dataObj->GetFormat() == format ) - { - return dataObj; - } - + if (dataObj->IsSupported(format,dir)) + return dataObj; node = node->GetNext(); } - - return (wxDataObjectSimple *)NULL; + return NULL; } void wxDataObjectComposite::Add(wxDataObjectSimple *dataObject, bool preferred) { + // check if the data format of the passed object already exists in the composite data object, if this is the case + // do not add the data object and display a message in debug mode (otherwise this method fails silently): + // start checking if the data format exists for the 'GET' direction: + size_t indexFormats; + size_t noOfFormats; + wxDataFormat* formats; + + noOfFormats = dataObject->GetFormatCount(wxDataObjectBase::Get); + formats = new wxDataFormat[noOfFormats]; + for (indexFormats=0; indexFormatsGetObject(formats[indexFormats],wxDataObjectBase::Get) == NULL, + _("The data format for the GET-direction of the to be added data object already exists")); + delete[] formats; + // do the same with the 'SET' direction: + noOfFormats = dataObject->GetFormatCount(wxDataObjectBase::Set); + + formats = new wxDataFormat[noOfFormats]; + for (indexFormats=0; indexFormatsGetObject(formats[indexFormats],wxDataObjectBase::Set) == NULL, + _("The data format for the SET-direction of the to be added data object already exists")); + delete[] formats; + + // if we reach this location the data object can simply be appended: if ( preferred ) m_preferred = m_dataObjects.GetCount(); - m_dataObjects.Append( dataObject ); } +wxDataFormat wxDataObjectComposite::GetReceivedFormat() const +{ + return m_receivedFormat; +} + wxDataFormat wxDataObjectComposite::GetPreferredFormat(Direction WXUNUSED(dir)) const { - wxSimpleDataObjectList::Node *node = m_dataObjects.Item( m_preferred ); + wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.Item( m_preferred ); - wxCHECK_MSG( node, wxDataFormat((unsigned short) wxDF_INVALID), wxT("no preferred format") ); + wxCHECK_MSG( node, wxFormatInvalid, wxT("no preferred format") ); wxDataObjectSimple* dataObj = node->GetData(); return dataObj->GetFormat(); } -size_t wxDataObjectComposite::GetFormatCount(Direction WXUNUSED(dir)) const +#if defined(__WXMSW__) + +size_t wxDataObjectComposite::GetBufferOffset( const wxDataFormat& format ) { - // TODO what about the Get/Set only formats? - return m_dataObjects.GetCount(); + wxDataObjectSimple *dataObj = GetObject(format); + + wxCHECK_MSG( dataObj, 0, + wxT("unsupported format in wxDataObjectComposite")); + + return dataObj->GetBufferOffset( format ); } -void wxDataObjectComposite::GetAllFormats(wxDataFormat *formats, - Direction WXUNUSED(dir)) const + +const void* wxDataObjectComposite::GetSizeFromBuffer( const void* buffer, + size_t* size, + const wxDataFormat& format ) +{ + wxDataObjectSimple *dataObj = GetObject(format); + + wxCHECK_MSG( dataObj, NULL, + wxT("unsupported format in wxDataObjectComposite")); + + return dataObj->GetSizeFromBuffer( buffer, size, format ); +} + + +void* wxDataObjectComposite::SetSizeInBuffer( void* buffer, size_t size, + const wxDataFormat& format ) +{ + wxDataObjectSimple *dataObj = GetObject( format ); + + wxCHECK_MSG( dataObj, NULL, + wxT("unsupported format in wxDataObjectComposite")); + + return dataObj->SetSizeInBuffer( buffer, size, format ); +} + +#endif + +size_t wxDataObjectComposite::GetFormatCount(Direction dir) const { size_t n = 0; - wxSimpleDataObjectList::Node *node; + + // NOTE: some wxDataObjectSimple objects may return a number greater than 1 + // from GetFormatCount(): this is the case of e.g. wxTextDataObject + // under wxMac and wxGTK + wxSimpleDataObjectList::compatibility_iterator node; + for ( node = m_dataObjects.GetFirst(); node; node = node->GetNext() ) + n += node->GetData()->GetFormatCount(dir); + + return n; +} + +void wxDataObjectComposite::GetAllFormats(wxDataFormat *formats, + Direction dir) const +{ + size_t index(0); + wxSimpleDataObjectList::compatibility_iterator node; + for ( node = m_dataObjects.GetFirst(); node; node = node->GetNext() ) { - // TODO if ( !outputOnlyToo ) && this one counts ... - formats[n++] = node->GetData()->GetFormat(); + // NOTE: some wxDataObjectSimple objects may return more than 1 format + // from GetAllFormats(): this is the case of e.g. wxTextDataObject + // under wxMac and wxGTK + node->GetData()->GetAllFormats(formats+index, dir); + index += node->GetData()->GetFormatCount(dir); } } @@ -135,100 +238,228 @@ size_t wxDataObjectComposite::GetDataSize(const wxDataFormat& format) const bool wxDataObjectComposite::GetDataHere(const wxDataFormat& format, void *buf) const { - wxDataObjectSimple *dataObj = GetObject(format); + wxDataObjectSimple *dataObj = GetObject( format ); - wxCHECK_MSG( dataObj, FALSE, + wxCHECK_MSG( dataObj, false, wxT("unsupported format in wxDataObjectComposite")); - return dataObj->GetDataHere(buf); + return dataObj->GetDataHere( buf ); } bool wxDataObjectComposite::SetData(const wxDataFormat& format, size_t len, const void *buf) { - wxDataObjectSimple *dataObj = GetObject(format); + wxDataObjectSimple *dataObj = GetObject( format ); - wxCHECK_MSG( dataObj, FALSE, + wxCHECK_MSG( dataObj, false, wxT("unsupported format in wxDataObjectComposite")); - return dataObj->SetData(len, buf); + m_receivedFormat = format; + return dataObj->SetData( len, buf ); } // ---------------------------------------------------------------------------- // wxTextDataObject // ---------------------------------------------------------------------------- -size_t wxTextDataObject::GetDataSize() const +#ifdef wxNEEDS_UTF8_FOR_TEXT_DATAOBJ + +// FIXME-UTF8: we should be able to merge wchar_t and UTF-8 versions once we +// have a way to get UTF-8 string (and its length) in both builds +// without loss of efficiency (i.e. extra buffer copy/strlen call) + +#if wxUSE_UNICODE_WCHAR + +static inline wxMBConv& GetConv(const wxDataFormat& format) { - return GetTextLength(); + // use UTF8 for wxDF_UNICODETEXT and UCS4 for wxDF_TEXT + return format == wxDF_UNICODETEXT ? wxConvUTF8 : wxConvLibc; } -bool wxTextDataObject::GetDataHere(void *buf) const +size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const { - strcpy((char *)buf, GetText().mb_str()); + wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); - return TRUE; + return buffer ? strlen( buffer ) : 0; } -bool wxTextDataObject::SetData(size_t WXUNUSED(len), const void *buf) +bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const { - SetText(wxString((const char *)buf)); + if ( !buf ) + return false; + + wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); + if ( !buffer ) + return false; + + memcpy( (char*) buf, buffer, GetDataSize(format) ); + // strcpy( (char*) buf, buffer ); - return TRUE; + return true; } -// ---------------------------------------------------------------------------- -// wxFileDataObjectBase -// ---------------------------------------------------------------------------- +bool wxTextDataObject::SetData(const wxDataFormat& format, + size_t WXUNUSED(len), const void *buf) +{ + if ( buf == NULL ) + return false; -// VZ: I don't need this in MSW finally, so if it is needed in wxGTK, it should -// be moved to gtk/dataobj.cpp -#if 0 + wxWCharBuffer buffer = GetConv(format).cMB2WX( (const char*)buf ); -wxString wxFileDataObjectBase::GetFilenames() const + SetText( buffer ); + + return true; +} + +#else // wxUSE_UNICODE_UTF8 + +size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const { - wxString str; - size_t count = m_filenames.GetCount(); - for ( size_t n = 0; n < count; n++ ) + if ( format == wxDF_UNICODETEXT || wxLocaleIsUtf8 ) { - str << m_filenames[n] << wxT('\0'); + return m_text.utf8_length(); + } + else // wxDF_TEXT + { + const wxCharBuffer buf(wxConvLocal.cWC2MB(m_text.wc_str())); + return buf ? strlen(buf) : 0; } - - return str; } -void wxFileDataObjectBase::SetFilenames(const wxChar* filenames) +bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const { - m_filenames.Empty(); + if ( !buf ) + return false; - wxString current; - for ( const wxChar *pc = filenames; ; pc++ ) + if ( format == wxDF_UNICODETEXT || wxLocaleIsUtf8 ) { - if ( *pc ) - { - current += *pc; - } - else - { - if ( !current ) - { - // 2 consecutive NULs - this is the end of the string - break; - } + memcpy(buf, m_text.utf8_str(), m_text.utf8_length()); + } + else // wxDF_TEXT + { + const wxCharBuffer bufLocal(wxConvLocal.cWC2MB(m_text.wc_str())); + if ( !bufLocal ) + return false; - m_filenames.Add(current); - current.Empty(); - } + memcpy(buf, bufLocal, strlen(bufLocal)); } + + return true; +} + +bool wxTextDataObject::SetData(const wxDataFormat& format, + size_t len, const void *buf_) +{ + const char * const buf = static_cast(buf_); + + if ( buf == NULL ) + return false; + + if ( format == wxDF_UNICODETEXT || wxLocaleIsUtf8 ) + { + // normally the data is in UTF-8 so we could use FromUTF8Unchecked() + // but it's not absolutely clear what GTK+ does if the clipboard data + // is not in UTF-8 so do an extra check for tranquility, it shouldn't + // matter much if we lose a bit of performance when pasting from + // clipboard + m_text = wxString::FromUTF8(buf, len); + } + else // wxDF_TEXT, convert from current (non-UTF8) locale + { + m_text = wxConvLocal.cMB2WC(buf, len, NULL); + } + + return true; +} + +#endif // wxUSE_UNICODE_WCHAR/wxUSE_UNICODE_UTF8 + +#elif defined(wxNEEDS_UTF16_FOR_TEXT_DATAOBJ) + +static wxMBConvUTF16 sUTF16Converter; + +static inline wxMBConv& GetConv(const wxDataFormat& format) +{ + return + format == wxDF_UNICODETEXT + ? (wxMBConv&) sUTF16Converter + : (wxMBConv&) wxConvLocal; +} + +size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const +{ + size_t len = GetConv(format).WC2MB( NULL, GetText().c_str(), 0 ); + len += (format == wxDF_UNICODETEXT ? 2 : 1); + + return len; +} + +bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const +{ + if ( buf == NULL ) + return false; + + wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); + + size_t len = GetConv(format).WC2MB( NULL, GetText().c_str(), 0 ); + len += (format == wxDF_UNICODETEXT ? 2 : 1); + + // trailing (uni)char 0 + memcpy( (char*)buf, (const char*)buffer, len ); + + return true; +} + +bool wxTextDataObject::SetData(const wxDataFormat& format, + size_t WXUNUSED(len), const void *buf) +{ + if ( buf == NULL ) + return false; + + wxWCharBuffer buffer = GetConv(format).cMB2WX( (const char*)buf ); + + SetText( buffer ); + + return true; +} + +#else // !wxNEEDS_UTF{8,16}_FOR_TEXT_DATAOBJ + +size_t wxTextDataObject::GetDataSize() const +{ + return GetTextLength() * sizeof(wxChar); +} + +bool wxTextDataObject::GetDataHere(void *buf) const +{ + // NOTE: use wxTmemcpy() instead of wxStrncpy() to allow + // retrieval of strings with embedded NULLs + wxTmemcpy( (wxChar*)buf, GetText().c_str(), GetTextLength() ); + + return true; +} + +bool wxTextDataObject::SetData(size_t len, const void *buf) +{ + SetText( wxString((const wxChar*)buf, len/sizeof(wxChar)) ); + + return true; } -#endif // 0 +#endif // different wxTextDataObject implementations // ---------------------------------------------------------------------------- // wxCustomDataObject // ---------------------------------------------------------------------------- +wxCustomDataObject::wxCustomDataObject(const wxDataFormat& format) + : wxDataObjectSimple(format) +{ + m_data = NULL; + m_size = 0; +} + wxCustomDataObject::~wxCustomDataObject() { Free(); @@ -249,9 +480,9 @@ void *wxCustomDataObject::Alloc(size_t size) void wxCustomDataObject::Free() { - delete [] m_data; + delete [] (char*)m_data; m_size = 0; - m_data = (void *)NULL; + m_data = NULL; } size_t wxCustomDataObject::GetDataSize() const @@ -261,13 +492,16 @@ size_t wxCustomDataObject::GetDataSize() const bool wxCustomDataObject::GetDataHere(void *buf) const { + if ( buf == NULL ) + return false; + void *data = GetData(); - if ( !data ) - return FALSE; + if ( data == NULL ) + return false; - memcpy(buf, data, GetSize()); + memcpy( buf, data, GetSize() ); - return TRUE; + return true; } bool wxCustomDataObject::SetData(size_t size, const void *buf) @@ -275,11 +509,63 @@ bool wxCustomDataObject::SetData(size_t size, const void *buf) Free(); m_data = Alloc(size); - if ( !m_data ) - return FALSE; + if ( m_data == NULL ) + return false; - memcpy(m_data, buf, m_size = size); + m_size = size; + memcpy( m_data, buf, m_size ); - return TRUE; + return true; } +// ============================================================================ +// some common dnd related code +// ============================================================================ + +#if wxUSE_DRAG_AND_DROP + +#include "wx/dnd.h" + +// ---------------------------------------------------------------------------- +// wxTextDropTarget +// ---------------------------------------------------------------------------- + +// NB: we can't use "new" in ctor initializer lists because this provokes an +// internal compiler error with VC++ 5.0 (hey, even gcc compiles this!), +// so use SetDataObject() instead + +wxTextDropTarget::wxTextDropTarget() +{ + SetDataObject(new wxTextDataObject); +} + +wxDragResult wxTextDropTarget::OnData(wxCoord x, wxCoord y, wxDragResult def) +{ + if ( !GetData() ) + return wxDragNone; + + wxTextDataObject *dobj = (wxTextDataObject *)m_dataObject; + return OnDropText( x, y, dobj->GetText() ) ? def : wxDragNone; +} + +// ---------------------------------------------------------------------------- +// wxFileDropTarget +// ---------------------------------------------------------------------------- + +wxFileDropTarget::wxFileDropTarget() +{ + SetDataObject(new wxFileDataObject); +} + +wxDragResult wxFileDropTarget::OnData(wxCoord x, wxCoord y, wxDragResult def) +{ + if ( !GetData() ) + return wxDragNone; + + wxFileDataObject *dobj = (wxFileDataObject *)m_dataObject; + return OnDropFiles( x, y, dobj->GetFilenames() ) ? def : wxDragNone; +} + +#endif // wxUSE_DRAG_AND_DROP + +#endif // wxUSE_DATAOBJ