///////////////////////////////////////////////////////////////////////////////
-// Name: textctrl.h
+// Name: wx/textctrl.h
// Purpose: wxTextCtrlBase class - the interface of wxTextCtrl
// Author: Vadim Zeitlin
// Modified by:
// Created: 13.07.99
// RCS-ID: $Id$
-// Copyright: (c) wxWindows team
+// Copyright: (c) Vadim Zeitlin
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma interface "textctrlbase.h"
-#endif
#include "wx/defs.h"
-#include "wx/control.h" // the base class
-// 16-bit Borland 4.0 doesn't seem to allow multiple inheritance with wxWindow
-// and streambuf: it complains about deriving a huge class from the huge class
-// streambuf. !! Also, can't use streambuf if making or using a DLL :-(
+#if wxUSE_TEXTCTRL
-#if (defined(__BORLANDC__)) || defined(__MWERKS__) || defined(_WINDLL) || defined(WXUSINGDLL) || defined(WXMAKINGDLL)
- #define NO_TEXT_WINDOW_STREAM
+#include "wx/control.h" // the base class
+#include "wx/dynarray.h" // wxArrayInt
+#include "wx/gdicmn.h" // wxPoint
+
+// Open Watcom 1.3 does allow only ios::rdbuf() while
+// we want something with streambuf parameter
+// Also, can't use streambuf if making or using a DLL :-(
+
+#if defined(__WATCOMC__) || \
+ defined(__MWERKS__) || \
+ (defined(__WINDOWS__) && (defined(WXUSINGDLL) || defined(WXMAKINGDLL)))
+ #define wxHAS_TEXT_WINDOW_STREAM 0
+#elif wxUSE_STD_IOSTREAM
+ #include "wx/ioswrap.h"
+ #define wxHAS_TEXT_WINDOW_STREAM 1
+#else
+ #define wxHAS_TEXT_WINDOW_STREAM 0
#endif
-#ifndef NO_TEXT_WINDOW_STREAM
- #if wxUSE_STD_IOSTREAM
- #include "wx/ioswrap.h" // for iostream classes if we need them
- #else // !wxUSE_STD_IOSTREAM
- // can't compile this feature in if we don't use streams at all
- #define NO_TEXT_WINDOW_STREAM
- #endif // wxUSE_STD_IOSTREAM/!wxUSE_STD_IOSTREAM
+#if WXWIN_COMPATIBILITY_2_4 && !wxHAS_TEXT_WINDOW_STREAM
+ // define old flag if one could use it somewhere
+ #define NO_TEXT_WINDOW_STREAM
#endif
class WXDLLEXPORT wxTextCtrl;
+class WXDLLEXPORT wxTextCtrlBase;
+
+// ----------------------------------------------------------------------------
+// wxTextCtrl types
+// ----------------------------------------------------------------------------
+
+// wxTextPos is the position in the text
+typedef long wxTextPos;
+
+// wxTextCoord is the line or row number (which should have been unsigned but
+// is long for backwards compatibility)
+typedef long wxTextCoord;
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
-WXDLLEXPORT_DATA(extern const wxChar*) wxTextCtrlNameStr;
-WXDLLEXPORT_DATA(extern const wxChar*) wxEmptyString;
+extern WXDLLEXPORT_DATA(const wxChar) wxTextCtrlNameStr[];
+
+// this is intentionally not enum to avoid warning fixes with
+// typecasting from enum type to wxTextCoord
+const wxTextCoord wxOutOfRangeTextCoord = -1;
+const wxTextCoord wxInvalidTextCoord = -2;
+
+// ----------------------------------------------------------------------------
+// wxTextCtrl style flags
+// ----------------------------------------------------------------------------
+
+#define wxTE_NO_VSCROLL 0x0002
+#define wxTE_AUTO_SCROLL 0x0008
+
+#define wxTE_READONLY 0x0010
+#define wxTE_MULTILINE 0x0020
+#define wxTE_PROCESS_TAB 0x0040
+
+// alignment flags
+#define wxTE_LEFT 0x0000 // 0x0000
+#define wxTE_CENTER wxALIGN_CENTER_HORIZONTAL // 0x0100
+#define wxTE_RIGHT wxALIGN_RIGHT // 0x0200
+#define wxTE_CENTRE wxTE_CENTER
+
+// this style means to use RICHEDIT control and does something only under wxMSW
+// and Win32 and is silently ignored under all other platforms
+#define wxTE_RICH 0x0080
+
+#define wxTE_PROCESS_ENTER 0x0400
+#define wxTE_PASSWORD 0x0800
+
+// automatically detect the URLs and generate the events when mouse is
+// moved/clicked over an URL
+//
+// this is for Win32 richedit and wxGTK2 multiline controls only so far
+#define wxTE_AUTO_URL 0x1000
+
+// by default, the Windows text control doesn't show the selection when it
+// doesn't have focus - use this style to force it to always show it
+#define wxTE_NOHIDESEL 0x2000
+
+// use wxHSCROLL to not wrap text at all, wxTE_CHARWRAP to wrap it at any
+// position and wxTE_WORDWRAP to wrap at words boundary
+//
+// if no wrapping style is given at all, the control wraps at word boundary
+#define wxTE_DONTWRAP wxHSCROLL
+#define wxTE_CHARWRAP 0x4000 // wrap at any position
+#define wxTE_WORDWRAP 0x0001 // wrap only at words boundaries
+#define wxTE_BESTWRAP 0x0000 // this is the default
+
+#if WXWIN_COMPATIBILITY_2_6
+ // obsolete synonym
+ #define wxTE_LINEWRAP wxTE_CHARWRAP
+#endif // WXWIN_COMPATIBILITY_2_6
+
+// force using RichEdit version 2.0 or 3.0 instead of 1.0 (default) for
+// wxTE_RICH controls - can be used together with or instead of wxTE_RICH
+#define wxTE_RICH2 0x8000
+
+// reuse wxTE_RICH2's value for CAPEDIT control on Windows CE
+#if defined(__SMARTPHONE__) || defined(__POCKETPC__)
+#define wxTE_CAPITALIZE wxTE_RICH2
+#else
+#define wxTE_CAPITALIZE 0
+#endif
+
+// ----------------------------------------------------------------------------
+// wxTextCtrl::HitTest return values
+// ----------------------------------------------------------------------------
+
+// the point asked is ...
+enum wxTextCtrlHitTestResult
+{
+ wxTE_HT_UNKNOWN = -2, // this means HitTest() is simply not implemented
+ wxTE_HT_BEFORE, // either to the left or upper
+ wxTE_HT_ON_TEXT, // directly on
+ wxTE_HT_BELOW, // below [the last line]
+ wxTE_HT_BEYOND // after [the end of line]
+};
+// ... the character returned
+
+// ----------------------------------------------------------------------------
+// Types for wxTextAttr
+// ----------------------------------------------------------------------------
+
+// Alignment
+
+enum wxTextAttrAlignment
+{
+ wxTEXT_ALIGNMENT_DEFAULT,
+ wxTEXT_ALIGNMENT_LEFT,
+ wxTEXT_ALIGNMENT_CENTRE,
+ wxTEXT_ALIGNMENT_CENTER = wxTEXT_ALIGNMENT_CENTRE,
+ wxTEXT_ALIGNMENT_RIGHT,
+ wxTEXT_ALIGNMENT_JUSTIFIED
+};
+
+// Flags to indicate which attributes are being applied
+
+#define wxTEXT_ATTR_TEXT_COLOUR 0x0001
+#define wxTEXT_ATTR_BACKGROUND_COLOUR 0x0002
+#define wxTEXT_ATTR_FONT_FACE 0x0004
+#define wxTEXT_ATTR_FONT_SIZE 0x0008
+#define wxTEXT_ATTR_FONT_WEIGHT 0x0010
+#define wxTEXT_ATTR_FONT_ITALIC 0x0020
+#define wxTEXT_ATTR_FONT_UNDERLINE 0x0040
+#define wxTEXT_ATTR_FONT \
+ ( wxTEXT_ATTR_FONT_FACE | wxTEXT_ATTR_FONT_SIZE | wxTEXT_ATTR_FONT_WEIGHT | \
+ wxTEXT_ATTR_FONT_ITALIC | wxTEXT_ATTR_FONT_UNDERLINE )
+#define wxTEXT_ATTR_ALIGNMENT 0x0080
+#define wxTEXT_ATTR_LEFT_INDENT 0x0100
+#define wxTEXT_ATTR_RIGHT_INDENT 0x0200
+#define wxTEXT_ATTR_TABS 0x0400
+
+// ----------------------------------------------------------------------------
+// wxTextAttr: a structure containing the visual attributes of a text
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxTextAttr
+{
+public:
+ // ctors
+ wxTextAttr() { Init(); }
+ wxTextAttr(const wxColour& colText,
+ const wxColour& colBack = wxNullColour,
+ const wxFont& font = wxNullFont,
+ wxTextAttrAlignment alignment = wxTEXT_ALIGNMENT_DEFAULT);
+
+ // operations
+ void Init();
+
+ // merges the attributes of the base and the overlay objects and returns
+ // the result; the parameter attributes take precedence
+ //
+ // WARNING: the order of arguments is the opposite of Combine()
+ static wxTextAttr Merge(const wxTextAttr& base, const wxTextAttr& overlay)
+ {
+ return Combine(overlay, base, NULL);
+ }
+
+ // merges the attributes of this object and overlay
+ void Merge(const wxTextAttr& overlay)
+ {
+ *this = Merge(*this, overlay);
+ }
+
+
+ // operators
+ void operator= (const wxTextAttr& attr);
+
+ // setters
+ void SetTextColour(const wxColour& colText) { m_colText = colText; m_flags |= wxTEXT_ATTR_TEXT_COLOUR; }
+ void SetBackgroundColour(const wxColour& colBack) { m_colBack = colBack; m_flags |= wxTEXT_ATTR_BACKGROUND_COLOUR; }
+ void SetFont(const wxFont& font, long flags = wxTEXT_ATTR_FONT) { m_font = font; m_flags |= flags; }
+ void SetAlignment(wxTextAttrAlignment alignment) { m_textAlignment = alignment; m_flags |= wxTEXT_ATTR_ALIGNMENT; }
+ void SetTabs(const wxArrayInt& tabs) { m_tabs = tabs; m_flags |= wxTEXT_ATTR_TABS; }
+ void SetLeftIndent(int indent, int subIndent = 0) { m_leftIndent = indent; m_leftSubIndent = subIndent; m_flags |= wxTEXT_ATTR_LEFT_INDENT; }
+ void SetRightIndent(int indent) { m_rightIndent = indent; m_flags |= wxTEXT_ATTR_RIGHT_INDENT; }
+ void SetFlags(long flags) { m_flags = flags; }
+
+ // accessors
+ bool HasTextColour() const { return m_colText.Ok() && HasFlag(wxTEXT_ATTR_TEXT_COLOUR) ; }
+ bool HasBackgroundColour() const { return m_colBack.Ok() && HasFlag(wxTEXT_ATTR_BACKGROUND_COLOUR) ; }
+ bool HasFont() const { return m_font.Ok() && HasFlag(wxTEXT_ATTR_FONT) ; }
+ bool HasAlignment() const { return (m_textAlignment != wxTEXT_ALIGNMENT_DEFAULT) || ((m_flags & wxTEXT_ATTR_ALIGNMENT) != 0) ; }
+ bool HasTabs() const { return (m_flags & wxTEXT_ATTR_TABS) != 0 ; }
+ bool HasLeftIndent() const { return (m_flags & wxTEXT_ATTR_LEFT_INDENT) != 0 ; }
+ bool HasRightIndent() const { return (m_flags & wxTEXT_ATTR_RIGHT_INDENT) != 0 ; }
+ bool HasFlag(long flag) const { return (m_flags & flag) != 0; }
+
+ const wxColour& GetTextColour() const { return m_colText; }
+ const wxColour& GetBackgroundColour() const { return m_colBack; }
+ const wxFont& GetFont() const { return m_font; }
+ wxTextAttrAlignment GetAlignment() const { return m_textAlignment; }
+ const wxArrayInt& GetTabs() const { return m_tabs; }
+ long GetLeftIndent() const { return m_leftIndent; }
+ long GetLeftSubIndent() const { return m_leftSubIndent; }
+ long GetRightIndent() const { return m_rightIndent; }
+ long GetFlags() const { return m_flags; }
+
+ // returns false if we have any attributes set, true otherwise
+ bool IsDefault() const
+ {
+ return !HasTextColour() && !HasBackgroundColour() && !HasFont() && !HasAlignment() &&
+ !HasTabs() && !HasLeftIndent() && !HasRightIndent() ;
+ }
+
+ // return the attribute having the valid font and colours: it uses the
+ // attributes set in attr and falls back first to attrDefault and then to
+ // the text control font/colours for those attributes which are not set
+ static wxTextAttr Combine(const wxTextAttr& attr,
+ const wxTextAttr& attrDef,
+ const wxTextCtrlBase *text);
+
+private:
+ long m_flags;
+ wxColour m_colText,
+ m_colBack;
+ wxFont m_font;
+ wxTextAttrAlignment m_textAlignment;
+ wxArrayInt m_tabs; // array of int: tab stops in 1/10 mm
+ int m_leftIndent; // left indent in 1/10 mm
+ int m_leftSubIndent; // left indent for all but the first
+ // line in a paragraph relative to the
+ // first line, in 1/10 mm
+ int m_rightIndent; // right indent in 1/10 mm
+};
// ----------------------------------------------------------------------------
// wxTextCtrl: a single or multiple line text zone where user can enter and
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxTextCtrlBase : public wxControl
-#ifndef NO_TEXT_WINDOW_STREAM
- , public streambuf
+#if wxHAS_TEXT_WINDOW_STREAM
+ , public wxSTD streambuf
#endif
{
// creation
// --------
- wxTextCtrlBase();
+ wxTextCtrlBase(){}
+ virtual ~wxTextCtrlBase(){}
// accessors
// ---------
virtual wxString GetValue() const = 0;
virtual void SetValue(const wxString& value) = 0;
+ virtual wxString GetRange(long from, long to) const;
+
virtual int GetLineLength(long lineNo) const = 0;
virtual wxString GetLineText(long lineNo) const = 0;
virtual int GetNumberOfLines() const = 0;
virtual bool IsModified() const = 0;
virtual bool IsEditable() const = 0;
+ // more readable flag testing methods
+ bool IsSingleLine() const { return !HasFlag(wxTE_MULTILINE); }
+ bool IsMultiLine() const { return !IsSingleLine(); }
+
// If the return values from and to are the same, there is no selection.
virtual void GetSelection(long* from, long* to) const = 0;
+ virtual wxString GetStringSelection() const;
+
// operations
// ----------
virtual bool LoadFile(const wxString& file);
virtual bool SaveFile(const wxString& file = wxEmptyString);
- // clears the dirty flag
+ // sets/clears the dirty flag
+ virtual void MarkDirty() = 0;
virtual void DiscardEdits() = 0;
+ void SetModified(bool modified)
+ {
+ if ( modified )
+ MarkDirty();
+ else
+ DiscardEdits();
+ }
+
+ // set the max number of characters which may be entered in a single line
+ // text control
+ virtual void SetMaxLength(unsigned long WXUNUSED(len)) { }
// writing text inserts it at the current position, appending always
// inserts it at the end
virtual void WriteText(const wxString& text) = 0;
virtual void AppendText(const wxString& text) = 0;
+ // insert the character which would have resulted from this key event,
+ // return true if anything has been inserted
+ virtual bool EmulateKeyPress(const wxKeyEvent& event);
+
+ // text control under some platforms supports the text styles: these
+ // methods allow to apply the given text style to the given selection or to
+ // set/get the style which will be used for all appended text
+ virtual bool SetStyle(long start, long end, const wxTextAttr& style);
+ virtual bool GetStyle(long position, wxTextAttr& style);
+ virtual bool SetDefaultStyle(const wxTextAttr& style);
+ virtual const wxTextAttr& GetDefaultStyle() const;
+
// translate between the position (which is just an index in the text ctrl
// considering all its contents as a single strings) and (x, y) coordinates
// which represent column and line.
virtual void ShowPosition(long pos) = 0;
+ // find the character at position given in pixels
+ //
+ // NB: pt is in device coords (not adjusted for the client area origin nor
+ // scrolling)
+ virtual wxTextCtrlHitTestResult HitTest(const wxPoint& pt, long *pos) const;
+ virtual wxTextCtrlHitTestResult HitTest(const wxPoint& pt,
+ wxTextCoord *col,
+ wxTextCoord *row) const;
+
// Clipboard operations
virtual void Copy() = 0;
virtual void Cut() = 0;
virtual void Paste() = 0;
- virtual bool CanCopy() const = 0;
- virtual bool CanCut() const = 0;
- virtual bool CanPaste() const = 0;
+ virtual bool CanCopy() const;
+ virtual bool CanCut() const;
+ virtual bool CanPaste() const;
// Undo/redo
virtual void Undo() = 0;
virtual void SetInsertionPoint(long pos) = 0;
virtual void SetInsertionPointEnd() = 0;
virtual long GetInsertionPoint() const = 0;
- virtual long GetLastPosition() const = 0;
+ virtual wxTextPos GetLastPosition() const = 0;
virtual void SetSelection(long from, long to) = 0;
+ virtual void SelectAll();
virtual void SetEditable(bool editable) = 0;
- // streambuf methods
-#ifndef NO_TEXT_WINDOW_STREAM
- int overflow(int i);
- int sync();
- int underflow();
-#endif // NO_TEXT_WINDOW_STREAM
-
// stream-like insertion operators: these are always available, whether we
// were, or not, compiled with streambuf support
wxTextCtrl& operator<<(const wxString& s);
wxTextCtrl& operator<<(double d);
wxTextCtrl& operator<<(const wxChar c);
- // obsolete functions
-#if WXWIN_COMPATIBILITY
- bool Modified() const { return IsModified(); }
-#endif
+ // do the window-specific processing after processing the update event
+ virtual void DoUpdateWindowUI(wxUpdateUIEvent& event);
+
+ virtual bool ShouldInheritColours() const { return false; }
protected:
+ // override streambuf method
+#if wxHAS_TEXT_WINDOW_STREAM
+ int overflow(int i);
+#endif // wxHAS_TEXT_WINDOW_STREAM
+
// the name of the last file loaded with LoadFile() which will be used by
// SaveFile() by default
wxString m_filename;
+
+ // the text style which will be used for any new text added to the control
+ wxTextAttr m_defaultStyle;
+
+ DECLARE_NO_COPY_CLASS(wxTextCtrlBase)
+ DECLARE_ABSTRACT_CLASS(wxTextCtrlBase)
};
// ----------------------------------------------------------------------------
// include the platform-dependent class definition
// ----------------------------------------------------------------------------
-#if defined(__WXMSW__)
+#if defined(__WXX11__)
+ #include "wx/x11/textctrl.h"
+#elif defined(__WXUNIVERSAL__)
+ #include "wx/univ/textctrl.h"
+#elif defined(__SMARTPHONE__) && defined(__WXWINCE__)
+ #include "wx/msw/wince/textctrlce.h"
+#elif defined(__WXMSW__)
#include "wx/msw/textctrl.h"
#elif defined(__WXMOTIF__)
#include "wx/motif/textctrl.h"
-#elif defined(__WXGTK__)
+#elif defined(__WXGTK20__)
#include "wx/gtk/textctrl.h"
-#elif defined(__WXQT__)
- #include "wx/qt/textctrl.h"
+#elif defined(__WXGTK__)
+ #include "wx/gtk1/textctrl.h"
#elif defined(__WXMAC__)
#include "wx/mac/textctrl.h"
+#elif defined(__WXCOCOA__)
+ #include "wx/cocoa/textctrl.h"
#elif defined(__WXPM__)
#include "wx/os2/textctrl.h"
-#elif defined(__WXSTUBS__)
- #include "wx/stubs/textctrl.h"
#endif
+// ----------------------------------------------------------------------------
+// wxTextCtrl events
+// ----------------------------------------------------------------------------
+
+#if !WXWIN_COMPATIBILITY_EVENT_TYPES
+
+BEGIN_DECLARE_EVENT_TYPES()
+ DECLARE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED, 7)
+ DECLARE_EVENT_TYPE(wxEVT_COMMAND_TEXT_ENTER, 8)
+ DECLARE_EVENT_TYPE(wxEVT_COMMAND_TEXT_URL, 13)
+ DECLARE_EVENT_TYPE(wxEVT_COMMAND_TEXT_MAXLEN, 14)
+END_DECLARE_EVENT_TYPES()
+
+#endif // !WXWIN_COMPATIBILITY_EVENT_TYPES
+
+class WXDLLEXPORT wxTextUrlEvent : public wxCommandEvent
+{
+public:
+ wxTextUrlEvent(int winid, const wxMouseEvent& evtMouse,
+ long start, long end)
+ : wxCommandEvent(wxEVT_COMMAND_TEXT_URL, winid)
+ , m_evtMouse(evtMouse), m_start(start), m_end(end)
+ { }
+
+ // get the mouse event which happend over the URL
+ const wxMouseEvent& GetMouseEvent() const { return m_evtMouse; }
+
+ // get the start of the URL
+ long GetURLStart() const { return m_start; }
+
+ // get the end of the URL
+ long GetURLEnd() const { return m_end; }
+
+protected:
+ // the corresponding mouse event
+ wxMouseEvent m_evtMouse;
+
+ // the start and end indices of the URL in the text control
+ long m_start,
+ m_end;
+
+private:
+ DECLARE_DYNAMIC_CLASS_NO_COPY(wxTextUrlEvent)
+
+public:
+ // for wxWin RTTI only, don't use
+ wxTextUrlEvent() : m_evtMouse(), m_start(0), m_end(0) { }
+};
+
+typedef void (wxEvtHandler::*wxTextUrlEventFunction)(wxTextUrlEvent&);
+
+#define wxTextEventHandler(func) wxCommandEventHandler(func)
+#define wxTextUrlEventHandler(func) \
+ (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxTextUrlEventFunction, &func)
+
+#define wx__DECLARE_TEXTEVT(evt, id, fn) \
+ wx__DECLARE_EVT1(wxEVT_COMMAND_TEXT_ ## evt, id, wxTextEventHandler(fn))
+
+#define wx__DECLARE_TEXTURLEVT(evt, id, fn) \
+ wx__DECLARE_EVT1(wxEVT_COMMAND_TEXT_ ## evt, id, wxTextUrlEventHandler(fn))
+
+#define EVT_TEXT(id, fn) wx__DECLARE_TEXTEVT(UPDATED, id, fn)
+#define EVT_TEXT_ENTER(id, fn) wx__DECLARE_TEXTEVT(ENTER, id, fn)
+#define EVT_TEXT_URL(id, fn) wx__DECLARE_TEXTURLEVT(URL, id, fn)
+#define EVT_TEXT_MAXLEN(id, fn) wx__DECLARE_TEXTEVT(MAXLEN, id, fn)
+
+#if wxHAS_TEXT_WINDOW_STREAM
+
+// ----------------------------------------------------------------------------
+// wxStreamToTextRedirector: this class redirects all data sent to the given
+// C++ stream to the wxTextCtrl given to its ctor during its lifetime.
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxStreamToTextRedirector
+{
+private:
+ void Init(wxTextCtrl *text)
+ {
+ m_sbufOld = m_ostr.rdbuf();
+ m_ostr.rdbuf(text);
+ }
+
+public:
+ wxStreamToTextRedirector(wxTextCtrl *text)
+ : m_ostr(wxSTD cout)
+ {
+ Init(text);
+ }
+
+ wxStreamToTextRedirector(wxTextCtrl *text, wxSTD ostream *ostr)
+ : m_ostr(*ostr)
+ {
+ Init(text);
+ }
+
+ ~wxStreamToTextRedirector()
+ {
+ m_ostr.rdbuf(m_sbufOld);
+ }
+
+private:
+ // the stream we're redirecting
+ wxSTD ostream& m_ostr;
+
+ // the old streambuf (before we changed it)
+ wxSTD streambuf *m_sbufOld;
+};
+
+#endif // wxHAS_TEXT_WINDOW_STREAM
+
+#endif // wxUSE_TEXTCTRL
+
#endif
// _WX_TEXTCTRL_H_BASE_
projects / wxWidgets.git / blobdiff