/////////////////////////////////////////////////////////////////////////////
// Name: src/gtk/clipbrd.cpp
-// Purpose:
+// Purpose: wxClipboard implementation for wxGTK
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#include "wx/dataobj.h"
#endif
+#include "wx/scopeguard.h"
+
#include "wx/gtk/private.h"
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
-GdkAtom g_clipboardAtom = 0;
-GdkAtom g_targetsAtom = 0;
-GdkAtom g_timestampAtom = 0;
+static GdkAtom g_clipboardAtom = 0;
+static GdkAtom g_targetsAtom = 0;
+static GdkAtom g_timestampAtom = 0;
#if wxUSE_UNICODE
extern GdkAtom g_altTextAtom;
// (there will be a *lot* of them!)
#define TRACE_CLIPBOARD _T("clipboard")
-//-----------------------------------------------------------------------------
-// reminder
-//-----------------------------------------------------------------------------
-
-/* The contents of a selection are returned in a GtkSelectionData
- structure. selection/target identify the request.
- type specifies the type of the return; if length < 0, and
- the data should be ignored. This structure has object semantics -
- no fields should be modified directly, they should not be created
- directly, and pointers to them should not be stored beyond the duration of
- a callback. (If the last is changed, we'll need to add reference
- counting)
+// ----------------------------------------------------------------------------
+// wxClipboardSync: used to perform clipboard operations synchronously
+// ----------------------------------------------------------------------------
-struct _GtkSelectionData
+// constructing this object on stack will wait wait until the latest clipboard
+// operation is finished on block exit
+//
+// notice that there can be no more than one such object alive at any moment,
+// i.e. reentrancies are not allowed
+class wxClipboardSync
{
- GdkAtom selection;
- GdkAtom target;
- GdkAtom type;
- gint format;
- guchar *data;
- gint length;
+public:
+ wxClipboardSync(wxClipboard& clipboard)
+ {
+ wxASSERT_MSG( !ms_clipboard, _T("reentrancy in clipboard code") );
+ ms_clipboard = &clipboard;
+ }
+
+ ~wxClipboardSync()
+ {
+ while ( ms_clipboard )
+ gtk_main_iteration();
+ }
+
+ // this method must be called by GTK+ callbacks to indicate that we got the
+ // result for our clipboard operation
+ static void OnDone(wxClipboard *clipboard)
+ {
+ wxASSERT_MSG( clipboard == ms_clipboard,
+ _T("got notification for alien clipboard") );
+
+ ms_clipboard = NULL;
+ }
+
+private:
+ static wxClipboard *ms_clipboard;
+
+ DECLARE_NO_COPY_CLASS(wxClipboardSync)
};
-*/
+wxClipboard *wxClipboardSync::ms_clipboard = NULL;
//-----------------------------------------------------------------------------
// "selection_received" for targets
guint32 WXUNUSED(time),
wxClipboard *clipboard )
{
+ wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, clipboard);
+
if ( wxTheClipboard && selection_data->length > 0 )
{
// make sure we got the data in the correct form
wxLogTrace( TRACE_CLIPBOARD,
_T("got unsupported clipboard target") );
- clipboard->m_waiting = false;
return;
}
}
if (format == clipboard->m_targetRequested)
{
- clipboard->m_waiting = false;
clipboard->m_formatSupported = true;
return;
}
}
}
-
- clipboard->m_waiting = false;
}
}
guint32 WXUNUSED(time),
wxClipboard *clipboard )
{
+ wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, clipboard);
+
if (!wxTheClipboard)
- {
- clipboard->m_waiting = false;
return;
- }
wxDataObject *data_object = clipboard->m_receivedData;
if (!data_object)
- {
- clipboard->m_waiting = false;
return;
- }
if (selection_data->length <= 0)
- {
- clipboard->m_waiting = false;
return;
- }
wxDataFormat format( selection_data->target );
// make sure we got the data in the correct format
if (!data_object->IsSupportedFormat( format ) )
- {
- clipboard->m_waiting = false;
- return;
- }
-
-#if 0
- This seems to cause problems somehow
- // make sure we got the data in the correct form (selection type).
- // if so, copy data to target object
- if (selection_data->type != GDK_SELECTION_TYPE_STRING)
- {
- clipboard->m_waiting = false;
return;
- }
-#endif
data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
wxTheClipboard->m_formatSupported = true;
- clipboard->m_waiting = false;
}
}
static gint
selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
+ wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, wxTheClipboard);
+
if (!wxTheClipboard) return true;
if (event->selection == GDK_SELECTION_PRIMARY)
}
else
{
- wxTheClipboard->m_waiting = false;
return FALSE;
}
}
}
- wxTheClipboard->m_waiting = false;
return TRUE;
}
}
wxClipboard::wxClipboard()
{
m_open = false;
- m_waiting = false;
m_ownsClipboard = false;
m_ownsPrimarySelection = false;
{
if (m_data)
{
-#if wxUSE_THREADS
- /* disable GUI threads */
-#endif
-
// As we have data we also own the clipboard. Once we no longer own
// it, clear_selection is called which will set m_data to zero
if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
{
- m_waiting = true;
+ wxClipboardSync sync(*this);
gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
(guint32) GDK_CURRENT_TIME );
-
- while (m_waiting) gtk_main_iteration();
}
if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
{
- m_waiting = true;
+ wxClipboardSync sync(*this);
gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
(guint32) GDK_CURRENT_TIME );
-
- while (m_waiting) gtk_main_iteration();
}
delete m_data;
m_data = NULL;
-
-#if wxUSE_THREADS
- /* re-enable GUI threads */
-#endif
}
m_targetRequested = 0;
bool wxClipboard::IsSupported( const wxDataFormat& format )
{
- /* reentrance problems */
- if (m_waiting) return false;
-
/* store requested format to be asked for by callbacks */
m_targetRequested = format;
m_formatSupported = false;
- /* perform query. this will set m_formatSupported to
- true if m_targetRequested is supported.
- also, we have to wait for the "answer" from the
- clipboard owner which is an asynchronous process.
- therefore we set m_waiting = true here and wait
- until the callback "targets_selection_received"
- sets it to false */
-
- m_waiting = true;
-
- gtk_selection_convert( m_targetsWidget,
- m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
- : g_clipboardAtom,
- g_targetsAtom,
- (guint32) GDK_CURRENT_TIME );
+ // block until m_formatSupported is set from targets_selection_received
+ // callback
+ {
+ wxClipboardSync sync(*this);
- while (m_waiting) gtk_main_iteration();
+ gtk_selection_convert( m_targetsWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+ } // wait until we get the results
#if wxUSE_UNICODE
if (!m_formatSupported && format == wxDataFormat(wxDF_UNICODETEXT))
m_formatSupported = false;
- /* perform query. this will set m_formatSupported to
- true if m_targetRequested is supported.
- also, we have to wait for the "answer" from the
- clipboard owner which is an asynchronous process.
- therefore we set m_waiting = true here and wait
- until the callback "targets_selection_received"
- sets it to false */
-
- m_waiting = true;
-
- gtk_selection_convert( m_targetsWidget,
- m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
- : g_clipboardAtom,
- g_targetsAtom,
- (guint32) GDK_CURRENT_TIME );
+ // block until m_formatSupported is set by targets_selection_received
+ {
+ wxClipboardSync sync(*this);
- while (m_waiting) gtk_main_iteration();
+ gtk_selection_convert( m_targetsWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+ } // wait until we get the results
if (!m_formatSupported) continue;
/* start query */
m_formatSupported = false;
- /* ask for clipboard contents. this will set
- m_formatSupported to true if m_targetRequested
- is supported.
- also, we have to wait for the "answer" from the
- clipboard owner which is an asynchronous process.
- therefore we set m_waiting = true here and wait
- until the callback "targets_selection_received"
- sets it to false */
-
- m_waiting = true;
-
wxLogTrace( TRACE_CLIPBOARD,
wxT("wxClipboard::GetData: format found, start convert") );
- gtk_selection_convert( m_clipboardWidget,
- m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
- : g_clipboardAtom,
- m_targetRequested,
- (guint32) GDK_CURRENT_TIME );
-
- while (m_waiting) gtk_main_iteration();
+ {
+ wxClipboardSync sync(*this);
+
+ gtk_selection_convert( m_clipboardWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ m_targetRequested,
+ (guint32) GDK_CURRENT_TIME );
+ } // wait until we get the results
/*
Normally this is a true error as we checked for the presence of such
projects / wxWidgets.git / commitdiff
