// Modified by: Ron Lee
// Created: 01/02/97
// RCS-ID: $Id$
-// Copyright: (c) wxWindows team
+// Copyright: (c) wxWidgets team
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// compiled in - it should only be used when building real wxFoo
#ifdef __WXUNIVERSAL__
#define wxUSE_MENUS_NATIVE 0
-#else // __WXMSW__
+#else // !__WXUNIVERSAL__
#define wxUSE_MENUS_NATIVE wxUSE_MENUS
-#endif // __WXUNIVERSAL__/__WXMSW__
+#endif // __WXUNIVERSAL__/!__WXUNIVERSAL__
// ----------------------------------------------------------------------------
// forward declarations
class WXDLLEXPORT wxAccessible;
#endif
+// ----------------------------------------------------------------------------
+// helper stuff used by wxWindow
+// ----------------------------------------------------------------------------
+
+// struct containing all the visual attributes of a control
+struct WXDLLEXPORT wxVisualAttributes
+{
+ // the font used for control label/text inside it
+ wxFont font;
+
+ // the foreground colour
+ wxColour colFg;
+
+ // the background colour, may be wxNullColour if the controls background
+ // colour is not solid
+ wxColour colBg;
+};
+
+// different window variants, on platforms like eg mac uses different
+// rendering sizes
+enum wxWindowVariant
+{
+ wxWINDOW_VARIANT_NORMAL, // Normal size
+ wxWINDOW_VARIANT_SMALL, // Smaller size (about 25 % smaller than normal)
+ wxWINDOW_VARIANT_MINI, // Mini size (about 33 % smaller than normal)
+ wxWINDOW_VARIANT_LARGE, // Large size (about 25 % larger than normal)
+ wxWINDOW_VARIANT_MAX
+};
+
+#if wxUSE_SYSTEM_OPTIONS
+ #define wxWINDOW_DEFAULT_VARIANT wxT("window-default-variant")
+#endif
+
// ----------------------------------------------------------------------------
// (pseudo)template list classes
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
-WXDLLEXPORT_DATA(extern wxWindowList) wxTopLevelWindows;
+extern WXDLLEXPORT_DATA(wxWindowList) wxTopLevelWindows;
// ----------------------------------------------------------------------------
// wxWindowBase is the base class for all GUI controls/widgets, this is the public
// window attributes
// -----------------
- // NB: in future versions of wxWindows Set/GetTitle() will only work
+ // NB: in future versions of wxWidgets Set/GetTitle() will only work
// with the top level windows (such as dialogs and frames) and
// Set/GetLabel() only with the other ones (i.e. all controls).
virtual void SetName( const wxString &name ) { m_windowName = name; }
virtual wxString GetName() const { return m_windowName; }
+ // sets the window variant, calls internally DoSetVariant if variant has changed
+ void SetWindowVariant( wxWindowVariant variant ) ;
+ wxWindowVariant GetWindowVariant() const { return m_windowVariant ; }
+
+
// window id uniquely identifies the window among its siblings unless
- // it is -1 which means "don't care"
+ // it is wxID_ANY which means "don't care"
void SetId( wxWindowID winid ) { m_windowId = winid; }
wxWindowID GetId() const { return m_windowId; }
{ DoSetSize(x, y, width, height, sizeFlags); }
void SetSize( int width, int height )
- { DoSetSize( -1, -1, width, height, wxSIZE_USE_EXISTING ); }
+ { DoSetSize( wxDefaultCoord, wxDefaultCoord, width, height, wxSIZE_USE_EXISTING ); }
void SetSize( const wxSize& size )
{ SetSize( size.x, size.y); }
{ DoSetSize(rect.x, rect.y, rect.width, rect.height, sizeFlags); }
void Move(int x, int y, int flags = wxSIZE_USE_EXISTING)
- { DoSetSize(x, y, -1, -1, flags); }
+ { DoSetSize(x, y, wxDefaultCoord, wxDefaultCoord, flags); }
void Move(const wxPoint& pt, int flags = wxSIZE_USE_EXISTING)
{ Move(pt.x, pt.y, flags); }
}
// get the size best suited for the window (in fact, minimal
- // acceptable size using which it will still look "nice")
- wxSize GetBestSize() const { return DoGetBestSize(); }
+ // acceptable size using which it will still look "nice" in
+ // most situations)
+ wxSize GetBestSize() const
+ {
+ if (m_bestSizeCache.IsFullySpecified())
+ return m_bestSizeCache;
+ return DoGetBestSize();
+ }
void GetBestSize(int *w, int *h) const
{
- wxSize s = DoGetBestSize();
+ wxSize s = GetBestSize();
if ( w )
*w = s.x;
if ( h )
*h = s.y;
}
+ // reset the cached best size value so it will be recalculated the
+ // next time it is needed.
+ void InvalidateBestSize();
+ void CacheBestSize(const wxSize& size) const
+ { wxConstCast(this, wxWindowBase)->m_bestSizeCache = size; }
+
// There are times (and windows) where 'Best' size and 'Min' size
// are vastly out of sync. This should be remedied somehow, but in
// the meantime, this method will return the larger of BestSize
// MinSize hint.
wxSize GetAdjustedBestSize() const
{
- wxSize s( DoGetBestSize() );
+ wxSize s( GetBestSize() );
return wxSize( wxMax( s.x, GetMinWidth() ), wxMax( s.y, GetMinHeight() ) );
}
+ // This function will merge the window's best size into the window's
+ // minimum size, giving priority to the min size components, and
+ // returns the results.
+ wxSize GetBestFittingSize() const;
+
+ // A 'Smart' SetSize that will fill in default size values with 'best'
+ // size. Sets the minsize to what was passed in.
+ void SetBestFittingSize(const wxSize& size=wxDefaultSize);
+
// the generic centre function - centers the window on parent by`
// default or on screen if it doesn't have parent or
// wxCENTER_ON_SCREEN flag is given
// set min/max size of the window
virtual void SetSizeHints( int minW, int minH,
- int maxW = -1, int maxH = -1,
- int incW = -1, int incH = -1 );
+ int maxW = wxDefaultCoord, int maxH = wxDefaultCoord,
+ int incW = wxDefaultCoord, int incH = wxDefaultCoord )
+ {
+ DoSetSizeHints(minW, minH, maxW, maxH, incW, incH);
+ }
+
+ void SetSizeHints( const wxSize& minSize,
+ const wxSize& maxSize=wxDefaultSize,
+ const wxSize& incSize=wxDefaultSize)
+ {
+ DoSetSizeHints(minSize.x, minSize.y,
+ maxSize.x, maxSize.y,
+ incSize.x, incSize.y);
+ }
+
+ virtual void DoSetSizeHints(int minW, int minH,
+ int maxW = wxDefaultCoord, int maxH = wxDefaultCoord,
+ int incW = wxDefaultCoord, int incH = wxDefaultCoord );
virtual void SetVirtualSizeHints( int minW, int minH,
- int maxW = -1, int maxH = -1 );
+ int maxW = wxDefaultCoord, int maxH = wxDefaultCoord );
+ void SetVirtualSizeHints( const wxSize& minSize,
+ const wxSize& maxSize=wxDefaultSize)
+ {
+ SetVirtualSizeHints(minSize.x, minSize.y, maxSize.x, maxSize.y);
+ }
virtual int GetMinWidth() const { return m_minWidth; }
virtual int GetMinHeight() const { return m_minHeight; }
// Override this method to control the values given to Sizers etc.
virtual wxSize GetMaxSize() const { return wxSize( m_maxWidth, m_maxHeight ); }
+ virtual wxSize GetMinSize() const { return wxSize( m_minWidth, m_minHeight ); }
+
+ void SetMinSize(const wxSize& minSize) { SetSizeHints(minSize); }
+ void SetMaxSize(const wxSize& maxSize) { SetSizeHints(GetMinSize(), maxSize); }
// Methods for accessing the virtual size of a window. For most
// windows this is just the client area of the window, but for
// Override these methods for windows that have a virtual size
// independent of their client size. eg. the virtual area of a
- // wxScrolledWindow. Default is to alias VirtualSize to ClientSize.
+ // wxScrolledWindow.
virtual void DoSetVirtualSize( int x, int y );
- virtual wxSize DoGetVirtualSize() const; // { return m_virtualSize; }
+ virtual wxSize DoGetVirtualSize() const;
// Return the largest of ClientSize and BestSize (as determined
// by a sizer, interior children, or other means)
virtual bool Enable( bool enable = true );
bool Disable() { return Enable(false); }
- bool IsShown() const { return m_isShown; }
- bool IsEnabled() const { return m_isEnabled; }
+ virtual bool IsShown() const { return m_isShown; }
+ virtual bool IsEnabled() const { return m_isEnabled; }
// get/set window style (setting style won't update the window and so
// is only useful for internal usage)
// make the window modal (all other windows unresponsive)
virtual void MakeModal(bool modal = true);
+
+ // (primitive) theming support
+ // ---------------------------
+
virtual void SetThemeEnabled(bool enableTheme) { m_themeEnabled = enableTheme; }
virtual bool GetThemeEnabled() const { return m_themeEnabled; }
// Returns true if this class should have the background colour
// changed to match the parent window's theme. For example when a
- // page is added to a notebook it and it's children may need to have
+ // page is added to a notebook it and its children may need to have
// the colours adjusted depending on the current theme settings, but
// not all windows/controls can do this without looking wrong.
virtual void ApplyParentThemeBackground(const wxColour& WXUNUSED(bg))
{ /* do nothing */ }
-
- // returns true if this window should inherit its parent colours on
- // creation
- virtual bool ShouldInheritColours() const { return false; }
// focus and keyboard handling
virtual void SetFocusFromKbd() { SetFocus(); }
// return the window which currently has the focus or NULL
- static wxWindow *FindFocus() /* = 0: implement in derived classes */;
+ static wxWindow *FindFocus();
+
+ static wxWindow *DoFindFocus() /* = 0: implement in derived classes */;
// can this window have focus?
virtual bool AcceptsFocus() const { return IsShown() && IsEnabled(); }
// set this child as temporary default
virtual void SetTmpDefaultItem(wxWindow * WXUNUSED(win)) { }
+ // navigates in the specified direction by sending a wxNavigationKeyEvent
+ virtual bool Navigate(int flags = wxNavigationKeyEvent::IsForward);
+
+ // move this window just before/after the specified one in tab order
+ // (the other window must be our sibling!)
+ void MoveBeforeInTabOrder(wxWindow *win)
+ { DoMoveInTabOrder(win, MoveBefore); }
+ void MoveAfterInTabOrder(wxWindow *win)
+ { DoMoveInTabOrder(win, MoveAfter); }
+
+
// parent/children relations
// -------------------------
// is this window a top level one?
virtual bool IsTopLevel() const;
- // it doesn't really change parent, use ReParent() instead
+ // it doesn't really change parent, use Reparent() instead
void SetParent( wxWindowBase *parent ) { m_parent = (wxWindow *)parent; }
// change the real parent of this window, return true if the parent
// was changed, false otherwise (error or newParent == oldParent)
// find window among the descendants of this one either by id or by
// name (return NULL if not found)
- wxWindow *FindWindow( long winid );
- wxWindow *FindWindow( const wxString& name );
+ wxWindow *FindWindow(long winid) const;
+ wxWindow *FindWindow(const wxString& name) const;
// Find a window among any window (all return NULL if not found)
static wxWindow *FindWindowById( long winid, const wxWindow *parent = NULL );
const wxRect *rect = (const wxRect *) NULL ) = 0;
// a less awkward wrapper for Refresh
- void RefreshRect(const wxRect& rect) { Refresh(true, &rect); }
+ void RefreshRect(const wxRect& rect, bool eraseBackground = true)
+ {
+ Refresh(eraseBackground, &rect);
+ }
// repaint all invalid areas of the window immediately
virtual void Update() { }
// colours, fonts and cursors
// --------------------------
+ // get the default attributes for the controls of this class: we
+ // provide a virtual function which can be used to query the default
+ // attributes of an existing control and a static function which can
+ // be used even when no existing object of the given class is
+ // available, but which won't return any styles specific to this
+ // particular control, of course (e.g. "Ok" button might have
+ // different -- bold for example -- font)
+ virtual wxVisualAttributes GetDefaultAttributes() const
+ {
+ return GetClassDefaultAttributes(GetWindowVariant());
+ }
+
+ static wxVisualAttributes
+ GetClassDefaultAttributes(wxWindowVariant variant = wxWINDOW_VARIANT_NORMAL);
+
// set/retrieve the window colours (system defaults are used by
- // default): Set functions return true if colour was changed
- virtual bool SetBackgroundColour( const wxColour &colour );
- virtual bool SetForegroundColour( const wxColour &colour );
+ // default): SetXXX() functions return true if colour was changed,
+ // SetDefaultXXX() reset the "m_inheritXXX" flag after setting the
+ // value to prevent it from being inherited by our children
+ virtual bool SetBackgroundColour(const wxColour& colour);
+ void SetOwnBackgroundColour(const wxColour& colour)
+ {
+ if ( SetBackgroundColour(colour) )
+ m_inheritBgCol = false;
+ }
+ wxColour GetBackgroundColour() const;
+ bool InheritsBackgroundColour() const
+ {
+ return m_inheritBgCol;
+ }
+ bool UseBgCol() const
+ {
+ return m_hasBgCol;
+ }
+
+ // if the window shouldn't inherit its colour from the parent, override
+ // this function to return true
+ //
+ // this is currently only used by wxMSW and wxUniv but should be useful for
+ // the other ports too
+ virtual bool ProvidesBackground() const { return false; }
+
+ virtual bool SetForegroundColour(const wxColour& colour);
+ void SetOwnForegroundColour(const wxColour& colour)
+ {
+ if ( SetForegroundColour(colour) )
+ m_inheritFgCol = false;
+ }
+ wxColour GetForegroundColour() const;
- wxColour GetBackgroundColour() const { return m_backgroundColour; }
- wxColour GetForegroundColour() const { return m_foregroundColour; }
+ // Set/get the background style.
+ // Pass one of wxBG_STYLE_SYSTEM, wxBG_STYLE_COLOUR, wxBG_STYLE_CUSTOM
+ virtual bool SetBackgroundStyle(wxBackgroundStyle style) { m_backgroundStyle = style; return true; }
+ virtual wxBackgroundStyle GetBackgroundStyle() const { return m_backgroundStyle; }
+
+ // returns true if the control has "transparent" areas such as a
+ // wxStaticText and wxCheckBox and the background should be adapted
+ // from a parent window
+ virtual bool HasTransparentBackground() { return false; }
+
+ // set/retrieve the font for the window (SetFont() returns true if the
+ // font really changed)
+ virtual bool SetFont(const wxFont& font) = 0;
+ void SetOwnFont(const wxFont& font)
+ {
+ if ( SetFont(font) )
+ m_inheritFont = false;
+ }
+ wxFont GetFont() const;
// set/retrieve the cursor for this window (SetCursor() returns true
// if the cursor was really changed)
virtual bool SetCursor( const wxCursor &cursor );
const wxCursor& GetCursor() const { return m_cursor; }
- wxCursor& GetCursor() { return m_cursor; }
-
- // set/retrieve the font for the window (SetFont() returns true if the
- // font really changed)
- virtual bool SetFont( const wxFont &font ) = 0;
- const wxFont& GetFont() const { return m_font; }
- wxFont& GetFont() { return m_font; }
#if wxUSE_CARET
// associate a caret with the window
virtual void DoUpdateWindowUI(wxUpdateUIEvent& event) ;
#if wxUSE_MENUS
- bool PopupMenu( wxMenu *menu, const wxPoint& pos )
+ bool PopupMenu(wxMenu *menu, const wxPoint& pos = wxDefaultPosition)
{ return DoPopupMenu(menu, pos.x, pos.y); }
- bool PopupMenu( wxMenu *menu, int x, int y )
+ bool PopupMenu(wxMenu *menu, int x, int y)
{ return DoPopupMenu(menu, x, y); }
#endif // wxUSE_MENUS
// get the associated tooltip or NULL if none
wxToolTip* GetToolTip() const { return m_tooltip; }
wxString GetToolTipText() const ;
+#else
+ // make it much easier to compile apps in an environment
+ // that doesn't support tooltips, such as PocketPC
+ inline void SetToolTip( const wxString & WXUNUSED(tip) ) {}
#endif // wxUSE_TOOLTIPS
// drag and drop
wxSizer *GetSizer() const { return m_windowSizer; }
// Track if this window is a member of a sizer
- void SetContainingSizer(wxSizer* sizer)
- {
- // adding a window to a sizer twice is going to result in fatal and
- // hard to debug problems later because when deleting the second
- // associated wxSizerItem we're going to dereference a dangling
- // pointer; so try to detect this as early as possible
- wxASSERT_MSG( !sizer || m_containingSizer != sizer,
- _T("Adding a window to the same sizer twice?") );
-
- m_containingSizer = sizer;
- }
+ void SetContainingSizer(wxSizer* sizer);
wxSizer *GetContainingSizer() const { return m_containingSizer; }
// accessibility
// is only used for wxWin itself or for user code which wants to call
// platform-specific APIs
virtual WXWidget GetHandle() const = 0;
+ // associate the window with a new native handle
+ virtual void AssociateHandle(WXWidget WXUNUSED(handle)) { }
+ // dissociate the current native handle from the window
+ virtual void DissociateHandle() { }
#if wxUSE_PALETTE
// Store the palette used by DCs in wxWindow so that the dcs can share
wxWindow *GetAncestorWithCustomPalette() const;
#endif // wxUSE_PALETTE
+ // inherit the parents visual attributes if they had been explicitly set
+ // by the user (i.e. we don't inherit default attributes) and if we don't
+ // have our own explicitly set
+ virtual void InheritAttributes();
+
+ // returns false from here if this window doesn't want to inherit the
+ // parents colours even if InheritAttributes() would normally do it
+ //
+ // this just provides a simple way to customize InheritAttributes()
+ // behaviour in the most common case
+ virtual bool ShouldInheritColours() const { return false; }
+
protected:
// event handling specific to wxWindow
virtual bool TryValidator(wxEvent& event);
virtual bool TryParent(wxEvent& event);
+ // common part of MoveBefore/AfterInTabOrder()
+ enum MoveKind
+ {
+ MoveBefore, // insert before the given window
+ MoveAfter // insert after the given window
+ };
+ virtual void DoMoveInTabOrder(wxWindow *win, MoveKind move);
#if wxUSE_CONSTRAINTS
// satisfy the constraints for the windows but don't set the window sizes
// Send the wxWindowDestroyEvent
void SendDestroyEvent();
+ // returns the main window of composite control; this is the window
+ // that FindFocus returns if the focus is in one of composite control's
+ // windows
+ virtual wxWindow *GetMainWindowOfCompositeControl()
+ { return (wxWindow*)this; }
+
// the window id - a number which uniquely identifies a window among
- // its siblings unless it is -1
+ // its siblings unless it is wxID_ANY
wxWindowID m_windowId;
// the parent window of this window (or NULL) and the list of the children
wxWindowList m_children;
// the minimal allowed size for the window (no minimal size if variable(s)
- // contain(s) -1)
+ // contain(s) wxDefaultCoord)
int m_minWidth,
m_minHeight,
m_maxWidth,
// visual window attributes
wxCursor m_cursor;
- wxFont m_font;
- wxColour m_backgroundColour, m_foregroundColour;
+ wxFont m_font; // see m_hasFont
+ wxColour m_backgroundColour, // m_hasBgCol
+ m_foregroundColour; // m_hasFgCol
#if wxUSE_CARET
wxCaret *m_caret;
bool m_hasFgCol:1;
bool m_hasFont:1;
+ // and should it be inherited by children?
+ bool m_inheritBgCol:1;
+ bool m_inheritFgCol:1;
+ bool m_inheritFont:1;
+
// window attributes
long m_windowStyle,
m_exStyle;
wxString m_windowName;
bool m_themeEnabled;
-
+ wxBackgroundStyle m_backgroundStyle;
#if wxUSE_PALETTE
wxPalette m_palette;
bool m_hasCustomPalette;
#if wxUSE_ACCESSIBILITY
wxAccessible* m_accessible;
#endif
+
// Virtual size (scrolling)
wxSize m_virtualSize;
int m_maxVirtualWidth;
int m_maxVirtualHeight;
+ wxWindowVariant m_windowVariant ;
+
// override this to change the default (i.e. used when no style is
// specified) border for the window class
virtual wxBorder GetDefaultBorder() const;
- // get the default size for the new window if no explicit size given
- // FIXME why 20 and not 30, 10 or ...?
- static int WidthDefault(int w) { return w == -1 ? 20 : w; }
- static int HeightDefault(int h) { return h == -1 ? 20 : h; }
+ // Get the default size for the new window if no explicit size given. TLWs
+ // have their own default size so this is just for non top-level windows.
+ static int WidthDefault(int w) { return w == wxDefaultCoord ? 20 : w; }
+ static int HeightDefault(int h) { return h == wxDefaultCoord ? 20 : h; }
+
- // set the best size for the control if the default size was given:
- // replaces the fields of size == -1 with the best values for them and
- // calls SetSize() if needed
+ // Used to save the results of DoGetBestSize so it doesn't need to be
+ // recalculated each time the value is needed.
+ wxSize m_bestSizeCache;
+
+ // keep the old name for compatibility, at least until all the internal
+ // usages of it are changed to SetBestFittingSize
+ void SetBestSize(const wxSize& size) { SetBestFittingSize(size); }
+
+ // set the initial window size if none is given (i.e. at least one of the
+ // components of the size passed to ctor/Create() is wxDefaultCoord)
//
- // This function is rather unfortunately named.. it's really just a
- // smarter SetSize / convenience function for expanding wxDefaultSize.
- // Note that it does not influence the value returned by GetBestSize
- // at all.
- void SetBestSize(const wxSize& size)
- {
- // the size only needs to be changed if the current size is incomplete,
- // i.e. one of the components was specified as default -- so if both
- // were given, simply don't do anything
- if ( size.x == -1 || size.y == -1 )
- {
- wxSize sizeBest = DoGetBestSize();
- if ( size.x != -1 )
- sizeBest.x = size.x;
- if ( size.y != -1 )
- sizeBest.y = size.y;
-
- SetSize(sizeBest);
- }
- }
+ // normally just calls SetBestSize() for controls, but can be overridden
+ // not to do it for the controls which have to do some additional
+ // initialization (e.g. add strings to list box) before their best size
+ // can be accurately calculated
+ virtual void SetInitialBestSize(const wxSize& WXUNUSED(size)) {}
+
+
// more pure virtual functions
// ---------------------------
#endif // wxUSE_TOOLTIPS
#if wxUSE_MENUS
- virtual bool DoPopupMenu( wxMenu *menu, int x, int y ) = 0;
+ virtual bool DoPopupMenu(wxMenu *menu, int x, int y) = 0;
#endif // wxUSE_MENUS
// Makes an adjustment to the window position to make it relative to the
virtual void AdjustForParentClientOrigin(int& x, int& y,
int sizeFlags = 0) const;
+ // implements the window variants
+ virtual void DoSetWindowVariant( wxWindowVariant variant ) ;
private:
-
// contains the last id generated by NewControlId
static int ms_lastControlId;
// ----------------------------------------------------------------------------
// include the declaration of the platform-specific class
-#if defined(__WXMSW__)
+#if defined(__WXPALMOS__)
+ #ifdef __WXUNIVERSAL__
+ #define wxWindowNative wxWindowPalm
+ #else // !wxUniv
+ #define wxWindowPalm wxWindow
+ #endif // wxUniv/!wxUniv
+ #include "wx/palmos/window.h"
+#elif defined(__WXMSW__)
#ifdef __WXUNIVERSAL__
#define wxWindowNative wxWindowMSW
#else // !wxUniv
// Find the wxWindow at the current mouse position, also returning the mouse
// position.
-WXDLLEXPORT extern wxWindow* wxFindWindowAtPointer(wxPoint& pt);
+extern WXDLLEXPORT wxWindow* wxFindWindowAtPointer(wxPoint& pt);
// Get the current mouse position.
-WXDLLEXPORT extern wxPoint wxGetMousePosition();
+extern WXDLLEXPORT wxPoint wxGetMousePosition();
// get the currently active window of this application or NULL
-WXDLLEXPORT extern wxWindow *wxGetActiveWindow();
+extern WXDLLEXPORT wxWindow *wxGetActiveWindow();
// get the (first) top level parent window
WXDLLEXPORT wxWindow* wxGetTopLevelParent(wxWindow *win);
{
public:
wxWindowAccessible(wxWindow* win): wxAccessible(win) { if (win) win->SetAccessible(this); }
- virtual ~wxWindowAccessible() {};
+ virtual ~wxWindowAccessible() {}
// Overridables
projects / wxWidgets.git / blobdiff