#include "wx/defs.h"
#include "wx/object.h"
+#include "wx/clntdata.h"
#if wxUSE_GUI
#include "wx/gdicmn.h"
class WXDLLEXPORT wxList;
#if wxUSE_GUI
- class WXDLLEXPORT wxClientData;
class WXDLLEXPORT wxDC;
class WXDLLEXPORT wxMenu;
class WXDLLEXPORT wxWindow;
#define DECLARE_EVENT_TYPE(name, value) name = wxEVT_FIRST + value,
#define DECLARE_LOCAL_EVENT_TYPE(name, value) name = wxEVT_FIRST + value,
#define DEFINE_EVENT_TYPE(name)
+#define DEFINE_LOCAL_EVENT_TYPE(name)
#else // !WXWIN_COMPATIBILITY_EVENT_TYPES
extern const wxEventType WXDLLEXPORT name;
#define DECLARE_LOCAL_EVENT_TYPE(name, value) extern const wxEventType name;
#define DEFINE_EVENT_TYPE(name) const wxEventType name = wxNewEventType();
+#define DEFINE_LOCAL_EVENT_TYPE(name) const wxEventType name = wxNewEventType();
// generate a new unique event type
extern WXDLLEXPORT wxEventType wxNewEventType();
class WXDLLEXPORT wxEvent : public wxObject
{
- DECLARE_ABSTRACT_CLASS(wxEvent)
+protected:
+ wxEvent(const wxEvent&); // for implementing Clone()
public:
- wxEvent(int id = 0);
- ~wxEvent() {}
+ wxEvent(int id = 0, wxEventType commandType = wxEVT_NULL );
void SetEventType(wxEventType typ) { m_eventType = typ; }
wxEventType GetEventType() const { return m_eventType; }
void Skip(bool skip = TRUE) { m_skipped = skip; }
bool GetSkipped() const { return m_skipped; };
- // implementation only: this test is explicitlty anti OO and this functions
- // exists only for optimization purposes
+ // Implementation only: this test is explicitlty anti OO and this functions
+ // exists only for optimization purposes.
bool IsCommandEvent() const { return m_isCommandEvent; }
- void CopyObject(wxObject& object_dest) const;
+ // this function is used to create a copy of the event polymorphically and
+ // all derived classes must implement it because otherwise wxPostEvent()
+ // for them wouldn't work (it needs to do a copy of the event)
+ virtual wxEvent *Clone() const = 0;
public:
wxObject* m_eventObject;
int m_id;
wxObject* m_callbackUserData;
bool m_skipped;
-
- // optimization: instead of using costly IsKindOf() we keep a flag telling
- // whether we're a command event (by far the most common case)
bool m_isCommandEvent;
+
+private:
+ DECLARE_ABSTRACT_CLASS(wxEvent)
};
#if wxUSE_GUI
class WXDLLEXPORT wxCommandEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxCommandEvent)
-
public:
wxCommandEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
- ~wxCommandEvent() {}
-
- /*
- * Accessors dependent on context
- *
- */
// Set/Get client data from controls
void SetClientData(void* clientData) { m_clientData = clientData; }
void SetInt(int i) { m_commandInt = i; }
long GetInt() const { return m_commandInt ; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxCommandEvent(*this); }
#if WXWIN_COMPATIBILITY_2
bool Checked() const { return IsChecked(); }
long m_extraLong; // Additional information (e.g. select/deselect)
void* m_clientData; // Arbitrary client data
wxClientData* m_clientObject; // Arbitrary client object
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxCommandEvent)
};
// this class adds a possibility to react (from the user) code to a control
// for implementation code only: is the operation allowed?
bool IsAllowed() const { return m_bAllow; }
- // probably useless: CopyObject() is used for deferred event
- // handling but wxNotifyEvent must be processed immediately
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxNotifyEvent(*this); }
private:
bool m_bAllow;
+private:
DECLARE_DYNAMIC_CLASS(wxNotifyEvent)
};
class WXDLLEXPORT wxScrollEvent : public wxCommandEvent
{
- DECLARE_DYNAMIC_CLASS(wxScrollEvent)
-
public:
wxScrollEvent(wxEventType commandType = wxEVT_NULL,
int id = 0, int pos = 0, int orient = 0);
- ~wxScrollEvent() {}
-
- /*
- * Accessors
- *
- */
int GetOrientation() const { return (int) m_extraLong ; }
int GetPosition() const { return m_commandInt ; }
void SetOrientation(int orient) { m_extraLong = (long) orient; }
void SetPosition(int pos) { m_commandInt = pos; }
+
+ virtual wxEvent *Clone() const { return new wxScrollEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxScrollEvent)
};
// ScrollWin event class, derived fom wxEvent. wxScrollWinEvents
public:
wxScrollWinEvent(wxEventType commandType = wxEVT_NULL,
int pos = 0, int orient = 0);
- ~wxScrollWinEvent() {}
-
- /*
- * Accessors
- */
int GetOrientation() const { return (int) m_extraLong ; }
int GetPosition() const { return m_commandInt ; }
void SetOrientation(int orient) { m_extraLong = (long) orient; }
void SetPosition(int pos) { m_commandInt = pos; }
- void CopyObject(wxObject& object_dest) const;
+ virtual wxEvent *Clone() const { return new wxScrollWinEvent(*this); }
public:
- int m_commandInt; // Additional information
+ int m_commandInt;
long m_extraLong;
+private:
DECLARE_DYNAMIC_CLASS(wxScrollWinEvent)
};
// wheel action. Defaults to one.
int GetLinesPerAction() const { return m_linesPerAction; }
-
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxMouseEvent(*this); }
public:
wxCoord m_x, m_y;
class WXDLLEXPORT wxSetCursorEvent : public wxEvent
{
public:
- wxSetCursorEvent(wxCoord x, wxCoord y)
+ wxSetCursorEvent(wxCoord x = 0, wxCoord y = 0)
{
m_eventType = wxEVT_SET_CURSOR;
const wxCursor& GetCursor() const { return m_cursor; }
bool HasCursor() const { return m_cursor.Ok(); }
+ virtual wxEvent *Clone() const { return new wxSetCursorEvent(*this); }
+
private:
wxCoord m_x, m_y;
wxCursor m_cursor;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxSetCursorEvent)
};
// Keyboard input event class
class WXDLLEXPORT wxKeyEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxKeyEvent)
-
public:
wxKeyEvent(wxEventType keyType = wxEVT_NULL);
bool AltDown() const { return m_altDown; }
bool ShiftDown() const { return m_shiftDown; }
- bool HasModifiers() const { return ControlDown() || AltDown() || MetaDown(); }
+ // exclude MetaDown() from HasModifiers() because NumLock under X is often
+ // configured as mod2 modifier, yet the key events even when it is pressed
+ // should be processed normally, not like Ctrl- or Alt-key
+ bool HasModifiers() const { return ControlDown() || AltDown(); }
// get the key code: an ASCII7 char or an element of wxKeyCode enum
int GetKeyCode() const { return (int)m_keyCode; }
// Get Y position
wxCoord GetY() const { return m_y; }
- void CopyObject(wxObject& obj) const;
-
// deprecated
long KeyCode() const { return m_keyCode; }
+ virtual wxEvent *Clone() const { return new wxKeyEvent(*this); }
+
+ // we do need to copy wxKeyEvent sometimes (in wxTreeCtrl code, for
+ // example)
+ wxKeyEvent& operator=(const wxKeyEvent& evt)
+ {
+ m_x = evt.m_x;
+ m_y = evt.m_y;
+
+ m_keyCode = evt.m_keyCode;
+
+ m_controlDown = evt.m_controlDown;
+ m_shiftDown = evt.m_shiftDown;
+ m_altDown = evt.m_altDown;
+ m_metaDown = evt.m_metaDown;
+ m_scanCode = evt.m_scanCode;
+
+ return *this;
+ }
+
public:
wxCoord m_x, m_y;
bool m_altDown;
bool m_metaDown;
bool m_scanCode;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxKeyEvent)
};
// Size event class
class WXDLLEXPORT wxSizeEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxSizeEvent)
-
public:
- wxSize m_size;
-
wxSizeEvent() { m_eventType = wxEVT_SIZE; }
wxSizeEvent(const wxSize& sz, int id = 0)
: m_size(sz)
wxSize GetSize() const { return m_size; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxSizeEvent(*this); }
+
+public:
+ wxSize m_size;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxSizeEvent)
};
// Move event class
class WXDLLEXPORT wxMoveEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxMoveEvent)
-
public:
- wxPoint m_pos;
-
wxMoveEvent() { m_eventType = wxEVT_MOVE; }
wxMoveEvent(const wxPoint& pos, int id = 0)
: m_pos(pos)
wxPoint GetPosition() const { return m_pos; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxMoveEvent(*this); }
+
+ wxPoint m_pos;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxMoveEvent)
};
// Paint event class
class WXDLLEXPORT wxPaintEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxPaintEvent)
-
public:
wxPaintEvent(int Id = 0)
{
g_isPainting--;
}
#endif // debug
+
+ virtual wxEvent *Clone() const { return new wxPaintEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxPaintEvent)
};
class WXDLLEXPORT wxNcPaintEvent : public wxEvent
public:
wxNcPaintEvent(int id = 0) : wxEvent(id) { SetEventType(wxEVT_NC_PAINT); }
+ virtual wxEvent *Clone() const { return new wxNcPaintEvent(*this); }
+
private:
DECLARE_DYNAMIC_CLASS(wxNcPaintEvent)
};
class WXDLLEXPORT wxEraseEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxEraseEvent)
-
public:
- wxDC *m_dc;
-
wxEraseEvent(int Id = 0, wxDC *dc = (wxDC *) NULL)
{ m_eventType = wxEVT_ERASE_BACKGROUND; m_id = Id; m_dc = dc; }
+
wxDC *GetDC() const { return m_dc; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxEraseEvent(*this); }
+
+ wxDC *m_dc;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxEraseEvent)
};
// Focus event class
wxFocusEvent(wxEventType type = wxEVT_NULL, int id = 0)
{ m_eventType = type; m_id = id; m_win = NULL; }
- // the window associated with this event is the window which had focus
+ // The window associated with this event is the window which had focus
// before for SET event and the window which will have focus for the KILL
- // one
- //
- // NB: it may be NULL in both cases!
+ // one. NB: it may be NULL in both cases!
wxWindow *GetWindow() const { return m_win; }
void SetWindow(wxWindow *win) { m_win = win; }
+ virtual wxEvent *Clone() const { return new wxFocusEvent(*this); }
+
private:
wxWindow *m_win;
+private:
DECLARE_DYNAMIC_CLASS(wxFocusEvent)
};
wxWindow *GetWindow() const { return (wxWindow *)GetEventObject(); }
+ virtual wxEvent *Clone() const { return new wxChildFocusEvent(*this); }
+
+private:
DECLARE_DYNAMIC_CLASS(wxChildFocusEvent)
};
class WXDLLEXPORT wxActivateEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxActivateEvent)
-
public:
wxActivateEvent(wxEventType type = wxEVT_NULL, bool active = TRUE, int Id = 0)
{ m_eventType = type; m_active = active; m_id = Id; }
+
bool GetActive() const { return m_active; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxActivateEvent(*this); }
private:
bool m_active;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxActivateEvent)
};
// InitDialog event class
class WXDLLEXPORT wxInitDialogEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxInitDialogEvent)
-
public:
wxInitDialogEvent(int Id = 0)
{ m_eventType = wxEVT_INIT_DIALOG; m_id = Id; }
+
+ virtual wxEvent *Clone() const { return new wxInitDialogEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxInitDialogEvent)
};
// Miscellaneous menu event class
class WXDLLEXPORT wxMenuEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxMenuEvent)
-
public:
wxMenuEvent(wxEventType type = wxEVT_NULL, int id = 0)
- { m_eventType = type; m_menuId = id; }
+ { m_eventType = type; m_menuId = id; m_id = id; }
int GetMenuId() const { return m_menuId; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxMenuEvent(*this); }
+
private:
int m_menuId;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxMenuEvent)
};
// Window close or session close event class
class WXDLLEXPORT wxCloseEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxCloseEvent)
-
public:
wxCloseEvent(wxEventType type = wxEVT_NULL, int id = 0)
{
bool GetForce() const { return m_force; }
#endif
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxCloseEvent(*this); }
protected:
bool m_loggingOff;
#if WXWIN_COMPATIBILITY
bool m_force;
#endif
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxCloseEvent)
+
};
/*
void SetShow(bool show) { m_show = show; }
bool GetShow() const { return m_show; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxShowEvent(*this); }
protected:
bool m_show;
+private:
DECLARE_DYNAMIC_CLASS(wxShowEvent)
};
// return true if the frame was iconized, false if restored
bool Iconized() const { return m_iconized; }
+ virtual wxEvent *Clone() const { return new wxIconizeEvent(*this); }
+
protected:
bool m_iconized;
+private:
DECLARE_DYNAMIC_CLASS(wxIconizeEvent)
};
-
/*
wxEVT_MAXIMIZE
*/
wxMaximizeEvent(int id = 0)
{ m_eventType = wxEVT_MAXIMIZE; m_id = id; }
+ virtual wxEvent *Clone() const { return new wxMaximizeEvent(*this); }
+
+private:
DECLARE_DYNAMIC_CLASS(wxMaximizeEvent)
};
class WXDLLEXPORT wxJoystickEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxJoystickEvent)
-
public:
wxPoint m_pos;
int m_zPosition;
{ return (((but == wxJOY_BUTTON_ANY) && (m_buttonState != 0)) ||
((m_buttonState & but) == but)); }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxJoystickEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxJoystickEvent)
};
// Drop files event class
class WXDLLEXPORT wxDropFilesEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxDropFilesEvent)
-
public:
int m_noFiles;
wxPoint m_pos;
- wxString* m_files; // Memory (de)allocated by code calling ProcessEvent
+ wxString* m_files;
wxDropFilesEvent(wxEventType type = wxEVT_NULL,
int noFiles = 0,
wxString *files = (wxString *) NULL)
{ m_eventType = type; m_noFiles = noFiles; m_files = files; }
+ // we need a copy ctor to avoid deleting m_files pointer twice
+ wxDropFilesEvent(const wxDropFilesEvent& other)
+ : m_pos(other.m_pos)
+ {
+ m_noFiles = other.m_noFiles;
+ m_files = new wxString[m_noFiles];
+ for ( int n = 0; n < m_noFiles; n++ )
+ {
+ m_files[n] = other.m_files[n];
+ }
+ }
+
+ virtual ~wxDropFilesEvent()
+ {
+ delete [] m_files;
+ }
+
wxPoint GetPosition() const { return m_pos; }
int GetNumberOfFiles() const { return m_noFiles; }
wxString *GetFiles() const { return m_files; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxDropFilesEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxDropFilesEvent)
};
// Update UI event
class WXDLLEXPORT wxUpdateUIEvent : public wxCommandEvent
{
- DECLARE_DYNAMIC_CLASS(wxUpdateUIEvent)
-
public:
wxUpdateUIEvent(wxWindowID commandId = 0)
{
void Enable(bool enable) { m_enabled = enable; m_setEnabled = TRUE; }
void SetText(const wxString& text) { m_text = text; m_setText = TRUE; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxUpdateUIEvent(*this); }
protected:
bool m_checked;
bool m_setText;
bool m_setChecked;
wxString m_text;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxUpdateUIEvent)
};
/*
// TODO: shouldn't all events record the window ID?
class WXDLLEXPORT wxSysColourChangedEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxSysColourChangedEvent)
-
public:
wxSysColourChangedEvent()
{ m_eventType = wxEVT_SYS_COLOUR_CHANGED; }
+
+ virtual wxEvent *Clone() const { return new wxSysColourChangedEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxSysColourChangedEvent)
};
/*
class WXDLLEXPORT wxPaletteChangedEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxPaletteChangedEvent)
-
public:
wxPaletteChangedEvent(wxWindowID id = 0) : wxEvent(id)
{
void SetChangedWindow(wxWindow* win) { m_changedWindow = win; }
wxWindow* GetChangedWindow() const { return m_changedWindow; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxPaletteChangedEvent(*this); }
protected:
wxWindow* m_changedWindow;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxPaletteChangedEvent)
};
/*
class WXDLLEXPORT wxQueryNewPaletteEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxQueryNewPaletteEvent)
-
public:
wxQueryNewPaletteEvent(wxWindowID id = 0): wxEvent(id)
{ m_eventType = wxEVT_QUERY_NEW_PALETTE; m_paletteRealized = FALSE; }
void SetPaletteRealized(bool realized) { m_paletteRealized = realized; }
bool GetPaletteRealized() const { return m_paletteRealized; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxQueryNewPaletteEvent(*this); }
protected:
bool m_paletteRealized;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxQueryNewPaletteEvent)
};
/*
wxWindow* GetCurrentFocus() const { return m_focus; }
void SetCurrentFocus(wxWindow *win) { m_focus = win; }
+ virtual wxEvent *Clone() const { return new wxNavigationKeyEvent(*this); }
+
private:
enum
{
long m_flags;
wxWindow *m_focus;
+private:
DECLARE_DYNAMIC_CLASS(wxNavigationKeyEvent)
};
class WXDLLEXPORT wxWindowCreateEvent : public wxCommandEvent
{
- DECLARE_DYNAMIC_CLASS(wxWindowCreateEvent)
-
public:
wxWindowCreateEvent(wxWindow *win = NULL);
wxWindow *GetWindow() const { return (wxWindow *)GetEventObject(); }
+
+ virtual wxEvent *Clone() const { return new wxWindowCreateEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxWindowCreateEvent)
};
class WXDLLEXPORT wxWindowDestroyEvent : public wxCommandEvent
{
- DECLARE_DYNAMIC_CLASS(wxWindowDestroyEvent)
-
public:
wxWindowDestroyEvent(wxWindow *win = NULL);
wxWindow *GetWindow() const { return (wxWindow *)GetEventObject(); }
+
+ virtual wxEvent *Clone() const { return new wxWindowDestroyEvent(*this); }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxWindowDestroyEvent)
};
// A help event is sent when the user clicks on a window in context-help mode.
const wxString& GetTarget() const { return m_target; }
void SetTarget(const wxString& target) { m_target = target; }
+ virtual wxEvent *Clone() const { return new wxHelpEvent(*this); }
+
protected:
wxPoint m_pos;
wxString m_target;
const wxPoint& GetPosition() const { return m_pos; }
void SetPosition(const wxPoint& pos) { m_pos = pos; }
+ virtual wxEvent *Clone() const { return new wxContextMenuEvent(*this); }
+
protected:
wxPoint m_pos;
class WXDLLEXPORT wxIdleEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxIdleEvent)
-
public:
wxIdleEvent()
{ m_eventType = wxEVT_IDLE; m_requestMore = FALSE; }
void RequestMore(bool needMore = TRUE) { m_requestMore = needMore; }
bool MoreRequested() const { return m_requestMore; }
- void CopyObject(wxObject& obj) const;
+ virtual wxEvent *Clone() const { return new wxIdleEvent(*this); }
protected:
bool m_requestMore;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxIdleEvent)
};
#endif // wxUSE_GUI
wxEVT_COMPARE_ITEM
*/
+
// ============================================================================
// event handler and related classes
// ============================================================================
wxObject *userData = (wxObject *) NULL )
{ return Disconnect(id, -1, eventType, func, userData); }
+
+ // User data can be associated with each wxEvtHandler
+ void SetClientObject( wxClientData *data ) { DoSetClientObject(data); }
+ wxClientData *GetClientObject() const { return DoGetClientObject(); }
+
+ void SetClientData( void *data ) { DoSetClientData(data); }
+ void *GetClientData() const { return DoGetClientData(); }
+
+
// implementation from now on
virtual bool SearchEventTable(wxEventTable& table, wxEvent& event);
bool SearchDynamicEventTable( wxEvent& event );
// Is event handler enabled?
bool m_enabled;
+
+ // The user data: either an object which will be deleted by the container
+ // when it's deleted or some raw pointer which we do nothing with - only
+ // one type of data can be used with the given window (i.e. you cannot set
+ // the void data and then associate the container with wxClientData or vice
+ // versa)
+ union
+ {
+ wxClientData *m_clientObject;
+ void *m_clientData;
+ };
+
+ // what kind of data do we have?
+ wxClientDataType m_clientDataType;
+
+ // client data accessors
+ virtual void DoSetClientObject( wxClientData *data );
+ virtual wxClientData *DoGetClientObject() const;
+
+ virtual void DoSetClientData( void *data );
+ virtual void *DoGetClientData() const;
+
+
private:
DECLARE_DYNAMIC_CLASS(wxEvtHandler)
};
projects / wxWidgets.git / blobdiff