+
+// ----------------------------------------------------------------------------
+// message processing
+// ----------------------------------------------------------------------------
+
+bool wxListCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
+{
+ if ( msg->message == WM_KEYDOWN )
+ {
+ // Only eat VK_RETURN if not being used by the application in
+ // conjunction with modifiers
+ if ( msg->wParam == VK_RETURN && !wxIsAnyModifierDown() )
+ {
+ // we need VK_RETURN to generate wxEVT_COMMAND_LIST_ITEM_ACTIVATED
+ return false;
+ }
+ }
+ return wxControl::MSWShouldPreProcessMessage(msg);
+}
+
+bool wxListCtrl::MSWCommand(WXUINT cmd, WXWORD id_)
+{
+ const int id = (signed short)id_;
+ if (cmd == EN_UPDATE)
+ {
+ wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
+ event.SetEventObject( this );
+ ProcessCommand(event);
+ return true;
+ }
+ else if (cmd == EN_KILLFOCUS)
+ {
+ wxCommandEvent event(wxEVT_KILL_FOCUS, id);
+ event.SetEventObject( this );
+ ProcessCommand(event);
+ return true;
+ }
+ else
+ return false;
+}
+
+// utility used by wxListCtrl::MSWOnNotify and by wxDataViewHeaderWindowMSW::MSWOnNotify
+int WXDLLIMPEXP_CORE wxMSWGetColumnClicked(NMHDR *nmhdr, POINT *ptClick)
+{
+ wxASSERT(nmhdr && ptClick);
+
+ // find the column clicked: we have to search for it
+ // ourselves as the notification message doesn't provide
+ // this info
+
+ // where did the click occur?
+#if defined(__WXWINCE__) && !defined(__HANDHELDPC__) && _WIN32_WCE < 400
+ if (nmhdr->code == GN_CONTEXTMENU)
+ {
+ *ptClick = ((NMRGINFO*)nmhdr)->ptAction;
+ }
+ else
+#endif //__WXWINCE__
+ if ( !::GetCursorPos(ptClick) )
+ {
+ wxLogLastError(_T("GetCursorPos"));
+ }
+
+ if ( !::ScreenToClient(nmhdr->hwndFrom, ptClick) )
+ {
+ wxLogLastError(_T("ScreenToClient(header)"));
+ }
+
+ int colCount = Header_GetItemCount(nmhdr->hwndFrom);
+
+ RECT rect;
+ for ( int col = 0; col < colCount; col++ )
+ {
+ if ( Header_GetItemRect(nmhdr->hwndFrom, col, &rect) )
+ {
+ if ( ::PtInRect(&rect, *ptClick) )
+ {
+ return col;
+ }
+ }
+ }
+
+ return wxNOT_FOUND;
+}
+
+bool wxListCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
+{
+
+ // prepare the event
+ // -----------------
+
+ wxListEvent event(wxEVT_NULL, m_windowId);
+ event.SetEventObject(this);
+
+ wxEventType eventType = wxEVT_NULL;
+
+ NMHDR *nmhdr = (NMHDR *)lParam;
+
+ // if your compiler is as broken as this, you should really change it: this
+ // code is needed for normal operation! #ifdef below is only useful for
+ // automatic rebuilds which are done with a very old compiler version
+#ifdef HDN_BEGINTRACKA
+
+ // check for messages from the header (in report view)
+ HWND hwndHdr = ListView_GetHeader(GetHwnd());
+
+ // is it a message from the header?
+ if ( nmhdr->hwndFrom == hwndHdr )
+ {
+ HD_NOTIFY *nmHDR = (HD_NOTIFY *)nmhdr;
+
+ event.m_itemIndex = -1;
+
+ switch ( nmhdr->code )
+ {
+ // yet another comctl32.dll bug: under NT/W2K it sends Unicode
+ // TRACK messages even to ANSI programs: on my system I get
+ // HDN_BEGINTRACKW and HDN_ENDTRACKA and no HDN_TRACK at all!
+ //
+ // work around is to simply catch both versions and hope that it
+ // works (why should this message exist in ANSI and Unicode is
+ // beyond me as it doesn't deal with strings at all...)
+ //
+ // note that fr HDN_TRACK another possibility could be to use
+ // HDN_ITEMCHANGING but it is sent even after HDN_ENDTRACK and when
+ // something other than the item width changes so we'd have to
+ // filter out the unwanted events then
+ case HDN_BEGINTRACKA:
+ case HDN_BEGINTRACKW:
+ eventType = wxEVT_COMMAND_LIST_COL_BEGIN_DRAG;
+ // fall through
+
+ case HDN_TRACKA:
+ case HDN_TRACKW:
+ if ( eventType == wxEVT_NULL )
+ eventType = wxEVT_COMMAND_LIST_COL_DRAGGING;
+ // fall through
+
+ case HDN_ENDTRACKA:
+ case HDN_ENDTRACKW:
+ if ( eventType == wxEVT_NULL )
+ eventType = wxEVT_COMMAND_LIST_COL_END_DRAG;
+
+ event.m_item.m_width = nmHDR->pitem->cxy;
+ event.m_col = nmHDR->iItem;
+ break;
+
+#if defined(__WXWINCE__) && !defined(__HANDHELDPC__) && _WIN32_WCE < 400
+ case GN_CONTEXTMENU:
+#endif //__WXWINCE__
+ case NM_RCLICK:
+ {
+ POINT ptClick;
+
+ eventType = wxEVT_COMMAND_LIST_COL_RIGHT_CLICK;
+ event.m_col = wxMSWGetColumnClicked(nmhdr, &ptClick);
+ event.m_pointDrag.x = ptClick.x;
+ event.m_pointDrag.y = ptClick.y;
+ }
+ break;
+
+ case HDN_GETDISPINFOW:
+ // letting Windows XP handle this message results in mysterious
+ // crashes in comctl32.dll seemingly because of bad message
+ // parameters
+ //
+ // I have no idea what is the real cause of the bug (which is,
+ // just to make things interesting, impossible to reproduce
+ // reliably) but ignoring all these messages does fix it and
+ // doesn't seem to have any negative consequences
+ return true;
+
+ default:
+ return wxControl::MSWOnNotify(idCtrl, lParam, result);
+ }
+ }
+ else
+#endif // defined(HDN_BEGINTRACKA)
+ if ( nmhdr->hwndFrom == GetHwnd() )
+ {
+ // almost all messages use NM_LISTVIEW
+ NM_LISTVIEW *nmLV = (NM_LISTVIEW *)nmhdr;
+
+ const int iItem = nmLV->iItem;
+
+
+ // FreeAllInternalData will cause LVN_ITEMCHANG* messages, which can be
+ // ignored for efficiency. It is done here because the internal data is in the
+ // process of being deleted so we don't want to try and access it below.
+ if ( m_ignoreChangeMessages &&
+ ( (nmLV->hdr.code == LVN_ITEMCHANGED) ||
+ (nmLV->hdr.code == LVN_ITEMCHANGING)) )
+ {
+ return true;
+ }
+
+
+ // If we have a valid item then check if there is a data value
+ // associated with it and put it in the event.
+ if ( iItem >= 0 && iItem < GetItemCount() )
+ {
+ wxListItemInternalData *internaldata =
+ wxGetInternalData(GetHwnd(), iItem);
+
+ if ( internaldata )
+ event.m_item.m_data = internaldata->lParam;
+ }
+
+ bool processed = true;
+ switch ( nmhdr->code )
+ {
+ case LVN_BEGINRDRAG:
+ eventType = wxEVT_COMMAND_LIST_BEGIN_RDRAG;
+ // fall through
+
+ case LVN_BEGINDRAG:
+ if ( eventType == wxEVT_NULL )
+ {
+ eventType = wxEVT_COMMAND_LIST_BEGIN_DRAG;
+ }
+
+ event.m_itemIndex = iItem;
+ event.m_pointDrag.x = nmLV->ptAction.x;
+ event.m_pointDrag.y = nmLV->ptAction.y;
+ break;
+
+ // NB: we have to handle both *A and *W versions here because some
+ // versions of comctl32.dll send ANSI messages even to the
+ // Unicode windows
+ case LVN_BEGINLABELEDITA:
+ case LVN_BEGINLABELEDITW:
+ {
+ wxLV_ITEM item;
+ if ( nmhdr->code == LVN_BEGINLABELEDITA )
+ {
+ item.Init(((LV_DISPINFOA *)lParam)->item);
+ }
+ else // LVN_BEGINLABELEDITW
+ {
+ item.Init(((LV_DISPINFOW *)lParam)->item);
+ }
+
+ eventType = wxEVT_COMMAND_LIST_BEGIN_LABEL_EDIT;
+ wxConvertFromMSWListItem(GetHwnd(), event.m_item, item);
+ event.m_itemIndex = event.m_item.m_itemId;
+ }
+ break;
+
+ case LVN_ENDLABELEDITA:
+ case LVN_ENDLABELEDITW:
+ {
+ wxLV_ITEM item;
+ if ( nmhdr->code == LVN_ENDLABELEDITA )
+ {
+ item.Init(((LV_DISPINFOA *)lParam)->item);
+ }
+ else // LVN_ENDLABELEDITW
+ {
+ item.Init(((LV_DISPINFOW *)lParam)->item);
+ }
+
+ // was editing cancelled?
+ const LV_ITEM& lvi = (LV_ITEM)item;
+ if ( !lvi.pszText || lvi.iItem == -1 )
+ {
+ // don't keep a stale wxTextCtrl around
+ if ( m_textCtrl )
+ {
+ // EDIT control will be deleted by the list control itself so
+ // prevent us from deleting it as well
+ m_textCtrl->UnsubclassWin();
+ m_textCtrl->SetHWND(0);
+ delete m_textCtrl;
+ m_textCtrl = NULL;
+ }
+
+ event.SetEditCanceled(true);
+ }
+
+ eventType = wxEVT_COMMAND_LIST_END_LABEL_EDIT;
+ wxConvertFromMSWListItem(NULL, event.m_item, item);
+ event.m_itemIndex = event.m_item.m_itemId;
+ }
+ break;
+
+ case LVN_COLUMNCLICK:
+ eventType = wxEVT_COMMAND_LIST_COL_CLICK;
+ event.m_itemIndex = -1;
+ event.m_col = nmLV->iSubItem;
+ break;
+
+ case LVN_DELETEALLITEMS:
+ eventType = wxEVT_COMMAND_LIST_DELETE_ALL_ITEMS;
+ event.m_itemIndex = -1;
+ break;
+
+ case LVN_DELETEITEM:
+ if ( m_count == 0 )
+ {
+ // this should be prevented by the post-processing code
+ // below, but "just in case"
+ return false;
+ }
+
+ eventType = wxEVT_COMMAND_LIST_DELETE_ITEM;
+ event.m_itemIndex = iItem;
+ // delete the assoicated internal data
+ wxDeleteInternalData(this, iItem);
+ break;
+
+ case LVN_INSERTITEM:
+ eventType = wxEVT_COMMAND_LIST_INSERT_ITEM;
+ event.m_itemIndex = iItem;
+ break;
+
+ case LVN_ITEMCHANGED:
+ // we translate this catch all message into more interesting
+ // (and more easy to process) wxWidgets events
+
+ // first of all, we deal with the state change events only and
+ // only for valid items (item == -1 for the virtual list
+ // control)
+ if ( nmLV->uChanged & LVIF_STATE && iItem != -1 )
+ {
+ // temp vars for readability
+ const UINT stOld = nmLV->uOldState;
+ const UINT stNew = nmLV->uNewState;
+
+ event.m_item.SetId(iItem);
+ event.m_item.SetMask(wxLIST_MASK_TEXT |
+ wxLIST_MASK_IMAGE |
+ wxLIST_MASK_DATA);
+ GetItem(event.m_item);
+
+ // has the focus changed?
+ if ( !(stOld & LVIS_FOCUSED) && (stNew & LVIS_FOCUSED) )
+ {
+ eventType = wxEVT_COMMAND_LIST_ITEM_FOCUSED;
+ event.m_itemIndex = iItem;
+ }
+
+ if ( (stNew & LVIS_SELECTED) != (stOld & LVIS_SELECTED) )
+ {
+ if ( eventType != wxEVT_NULL )
+ {
+ // focus and selection have both changed: send the
+ // focus event from here and the selection one
+ // below
+ event.SetEventType(eventType);
+ (void)HandleWindowEvent(event);
+ }
+ else // no focus event to send
+ {
+ // then need to set m_itemIndex as it wasn't done
+ // above
+ event.m_itemIndex = iItem;
+ }
+
+ eventType = stNew & LVIS_SELECTED
+ ? wxEVT_COMMAND_LIST_ITEM_SELECTED
+ : wxEVT_COMMAND_LIST_ITEM_DESELECTED;
+ }
+ }
+
+ if ( eventType == wxEVT_NULL )
+ {
+ // not an interesting event for us
+ return false;
+ }
+
+ break;
+
+ case LVN_KEYDOWN:
+ {
+ LV_KEYDOWN *info = (LV_KEYDOWN *)lParam;
+ WORD wVKey = info->wVKey;
+
+ // get the current selection
+ long lItem = GetNextItem(-1,
+ wxLIST_NEXT_ALL,
+ wxLIST_STATE_SELECTED);
+
+ // <Enter> or <Space> activate the selected item if any (but
+ // not with Shift and/or Ctrl as then they have a predefined
+ // meaning for the list view)
+ if ( lItem != -1 &&
+ (wVKey == VK_RETURN || wVKey == VK_SPACE) &&
+ !(wxIsShiftDown() || wxIsCtrlDown()) )
+ {
+ eventType = wxEVT_COMMAND_LIST_ITEM_ACTIVATED;
+ }
+ else
+ {
+ eventType = wxEVT_COMMAND_LIST_KEY_DOWN;
+
+ // wxCharCodeMSWToWX() returns 0 if the key is an ASCII
+ // value which should be used as is
+ int code = wxCharCodeMSWToWX(wVKey);
+ event.m_code = code ? code : wVKey;
+ }
+
+ event.m_itemIndex =
+ event.m_item.m_itemId = lItem;
+
+ if ( lItem != -1 )
+ {
+ // fill the other fields too
+ event.m_item.m_text = GetItemText(lItem);
+ event.m_item.m_data = GetItemData(lItem);
+ }
+ }
+ break;
+
+ case NM_DBLCLK:
+ // if the user processes it in wxEVT_COMMAND_LEFT_CLICK(), don't do
+ // anything else
+ if ( wxControl::MSWOnNotify(idCtrl, lParam, result) )
+ {
+ return true;
+ }
+
+ // else translate it into wxEVT_COMMAND_LIST_ITEM_ACTIVATED event
+ // if it happened on an item (and not on empty place)
+ if ( iItem == -1 )
+ {
+ // not on item
+ return false;
+ }
+
+ eventType = wxEVT_COMMAND_LIST_ITEM_ACTIVATED;
+ event.m_itemIndex = iItem;
+ event.m_item.m_text = GetItemText(iItem);
+ event.m_item.m_data = GetItemData(iItem);
+ break;
+
+#if defined(__WXWINCE__) && !defined(__HANDHELDPC__) && _WIN32_WCE < 400
+ case GN_CONTEXTMENU:
+#endif //__WXWINCE__
+ case NM_RCLICK:
+ // if the user processes it in wxEVT_COMMAND_RIGHT_CLICK(),
+ // don't do anything else
+ if ( wxControl::MSWOnNotify(idCtrl, lParam, result) )
+ {
+ return true;
+ }
+
+ // else translate it into wxEVT_COMMAND_LIST_ITEM_RIGHT_CLICK event
+ LV_HITTESTINFO lvhti;
+ wxZeroMemory(lvhti);
+
+#if defined(__WXWINCE__) && !defined(__HANDHELDPC__) && _WIN32_WCE < 400
+ if(nmhdr->code == GN_CONTEXTMENU) {
+ lvhti.pt = ((NMRGINFO*)nmhdr)->ptAction;
+ } else
+#endif //__WXWINCE__
+ ::GetCursorPos(&(lvhti.pt));
+ ::ScreenToClient(GetHwnd(),&(lvhti.pt));
+ if ( ListView_HitTest(GetHwnd(),&lvhti) != -1 )
+ {
+ if ( lvhti.flags & LVHT_ONITEM )
+ {
+ eventType = wxEVT_COMMAND_LIST_ITEM_RIGHT_CLICK;
+ event.m_itemIndex = lvhti.iItem;
+ event.m_pointDrag.x = lvhti.pt.x;
+ event.m_pointDrag.y = lvhti.pt.y;
+ }
+ }
+ break;
+
+#ifdef NM_CUSTOMDRAW
+ case NM_CUSTOMDRAW:
+ *result = OnCustomDraw(lParam);
+
+ return *result != CDRF_DODEFAULT;
+#endif // _WIN32_IE >= 0x300
+
+ case LVN_ODCACHEHINT:
+ {
+ const NM_CACHEHINT *cacheHint = (NM_CACHEHINT *)lParam;
+
+ eventType = wxEVT_COMMAND_LIST_CACHE_HINT;
+
+ // we get some really stupid cache hints like ones for
+ // items in range 0..0 for an empty control or, after
+ // deleting an item, for items in invalid range -- filter
+ // this garbage out
+ if ( cacheHint->iFrom > cacheHint->iTo )
+ return false;
+
+ event.m_oldItemIndex = cacheHint->iFrom;
+
+ const long iMax = GetItemCount();
+ event.m_itemIndex = cacheHint->iTo < iMax ? cacheHint->iTo
+ : iMax - 1;
+ }
+ break;
+
+#ifdef HAVE_NMLVFINDITEM
+ case LVN_ODFINDITEM:
+ // this message is only used with the virtual list control but
+ // even there we don't want to always use it: in a control with
+ // sufficiently big number of items (defined as > 1000 here),
+ // accidentally pressing a key could result in hanging an
+ // application waiting while it performs linear search
+ if ( IsVirtual() && GetItemCount() <= 1000 )
+ {
+ NMLVFINDITEM* pFindInfo = (NMLVFINDITEM*)lParam;
+
+ // no match by default
+ *result = -1;
+
+ // we only handle string-based searches here
+ //
+ // TODO: what about LVFI_PARTIAL, should we handle this?
+ if ( !(pFindInfo->lvfi.flags & LVFI_STRING) )
+ {
+ return false;
+ }
+
+ const wxChar * const searchstr = pFindInfo->lvfi.psz;
+ const size_t len = wxStrlen(searchstr);
+
+ // this is the first item we should examine, search from it
+ // wrapping if necessary
+ const int startPos = pFindInfo->iStart;
+ const int maxPos = GetItemCount();
+ wxCHECK_MSG( startPos <= maxPos, false,
+ _T("bad starting position in LVN_ODFINDITEM") );
+
+ int currentPos = startPos;
+ do
+ {
+ // wrap to the beginning if necessary
+ if ( currentPos == maxPos )
+ {
+ // somewhat surprizingly, LVFI_WRAP isn't set in
+ // flags but we still should wrap
+ currentPos = 0;
+ }
+
+ // does this item begin with searchstr?
+ if ( wxStrnicmp(searchstr,
+ GetItemText(currentPos), len) == 0 )
+ {
+ *result = currentPos;
+ break;
+ }
+ }
+ while ( ++currentPos != startPos );
+
+ if ( *result == -1 )
+ {
+ // not found
+ return false;
+ }
+
+ SetItemState(*result,
+ wxLIST_STATE_SELECTED | wxLIST_STATE_FOCUSED,
+ wxLIST_STATE_SELECTED | wxLIST_STATE_FOCUSED);
+ EnsureVisible(*result);
+ return true;
+ }
+ else
+ {
+ processed = false;
+ }
+ break;
+#endif // HAVE_NMLVFINDITEM
+
+ case LVN_GETDISPINFO:
+ if ( IsVirtual() )
+ {
+ LV_DISPINFO *info = (LV_DISPINFO *)lParam;
+
+ LV_ITEM& lvi = info->item;
+ long item = lvi.iItem;
+
+ if ( lvi.mask & LVIF_TEXT )
+ {
+ wxString text = OnGetItemText(item, lvi.iSubItem);
+ wxStrncpy(lvi.pszText, text, lvi.cchTextMax);
+ }
+
+ // see comment at the end of wxListCtrl::GetColumn()
+#ifdef NM_CUSTOMDRAW
+ if ( lvi.mask & LVIF_IMAGE )
+ {
+ lvi.iImage = OnGetItemColumnImage(item, lvi.iSubItem);
+ }
+#endif // NM_CUSTOMDRAW
+
+ // even though we never use LVM_SETCALLBACKMASK, we still
+ // can get messages with LVIF_STATE in lvi.mask under Vista
+ if ( lvi.mask & LVIF_STATE )
+ {
+ // we don't have anything to return from here...
+ lvi.stateMask = 0;
+ }
+
+ return true;
+ }
+ // fall through
+
+ default:
+ processed = false;
+ }
+
+ if ( !processed )
+ return wxControl::MSWOnNotify(idCtrl, lParam, result);
+ }
+ else
+ {
+ // where did this one come from?
+ return false;
+ }
+
+ // process the event
+ // -----------------
+
+ event.SetEventType(eventType);
+
+ bool processed = HandleWindowEvent(event);
+
+ // post processing
+ // ---------------
+ switch ( nmhdr->code )
+ {
+ case LVN_DELETEALLITEMS:
+ // always return true to suppress all additional LVN_DELETEITEM
+ // notifications - this makes deleting all items from a list ctrl
+ // much faster
+ *result = TRUE;
+
+ // also, we may free all user data now (couldn't do it before as
+ // the user should have access to it in OnDeleteAllItems() handler)
+ FreeAllInternalData();
+
+ // the control is empty now, synchronize the cached number of items
+ // with the real one
+ m_count = 0;
+ return true;
+
+ case LVN_ENDLABELEDITA:
+ case LVN_ENDLABELEDITW:
+ // logic here is inverted compared to all the other messages
+ *result = event.IsAllowed();
+
+ // don't keep a stale wxTextCtrl around
+ if ( m_textCtrl )
+ {
+ // EDIT control will be deleted by the list control itself so
+ // prevent us from deleting it as well
+ m_textCtrl->UnsubclassWin();
+ m_textCtrl->SetHWND(0);
+ delete m_textCtrl;
+ m_textCtrl = NULL;
+ }
+
+ return true;
+ }
+
+ if ( processed )
+ *result = !event.IsAllowed();
+
+ return processed;
+}
+
+// ----------------------------------------------------------------------------
+// custom draw stuff
+// ----------------------------------------------------------------------------
+
+// see comment at the end of wxListCtrl::GetColumn()
+#ifdef NM_CUSTOMDRAW // _WIN32_IE >= 0x0300
+
+static RECT GetCustomDrawnItemRect(const NMCUSTOMDRAW& nmcd)
+{
+ RECT rc;
+ ListView_GetItemRect(nmcd.hdr.hwndFrom, nmcd.dwItemSpec, &rc, LVIR_BOUNDS);
+
+ RECT rcIcon;
+ ListView_GetItemRect(nmcd.hdr.hwndFrom, nmcd.dwItemSpec, &rcIcon, LVIR_ICON);
+
+ // exclude the icon part, neither the selection background nor focus rect
+ // should cover it
+ rc.left = rcIcon.right;
+
+ return rc;
+}
+
+static
+bool HandleSubItemPrepaint(LPNMLVCUSTOMDRAW pLVCD, HFONT hfont, int colCount)
+{
+ NMCUSTOMDRAW& nmcd = pLVCD->nmcd;
+
+ HDC hdc = nmcd.hdc;
+ HWND hwndList = nmcd.hdr.hwndFrom;
+ const int col = pLVCD->iSubItem;
+ const DWORD item = nmcd.dwItemSpec;
+
+ // the font must be valid, otherwise we wouldn't be painting the item at all
+ SelectInHDC selFont(hdc, hfont);
+
+ // get the rectangle to paint
+ RECT rc;
+ ListView_GetSubItemRect(hwndList, item, col, LVIR_BOUNDS, &rc);
+ if ( !col && colCount > 1 )
+ {
+ // broken ListView_GetSubItemRect() returns the entire item rect for
+ // 0th subitem while we really need just the part for this column
+ RECT rc2;
+ ListView_GetSubItemRect(hwndList, item, 1, LVIR_BOUNDS, &rc2);
+
+ rc.right = rc2.left;
+ rc.left += 4;
+ }
+ else // not first subitem
+ {
+ rc.left += 6;
+ }
+
+ // get the image and text to draw
+ wxChar text[512];
+ LV_ITEM it;
+ wxZeroMemory(it);
+ it.mask = LVIF_TEXT | LVIF_IMAGE;
+ it.iItem = item;
+ it.iSubItem = col;
+ it.pszText = text;
+ it.cchTextMax = WXSIZEOF(text);
+ ListView_GetItem(hwndList, &it);
+
+ HIMAGELIST himl = ListView_GetImageList(hwndList, LVSIL_SMALL);
+ if ( himl && ImageList_GetImageCount(himl) )
+ {
+ if ( it.iImage != -1 )
+ {
+ ImageList_Draw(himl, it.iImage, hdc, rc.left, rc.top,
+ nmcd.uItemState & CDIS_SELECTED ? ILD_SELECTED
+ : ILD_TRANSPARENT);
+ }
+
+ // notice that even if this item doesn't have any image, the list
+ // control still leaves space for the image in the first column if the
+ // image list is not empty (presumably so that items with and without
+ // images align?)
+ if ( it.iImage != -1 || it.iSubItem == 0 )
+ {
+ int wImage, hImage;
+ ImageList_GetIconSize(himl, &wImage, &hImage);
+
+ rc.left += wImage + 2;
+ }
+ }
+
+ ::SetBkMode(hdc, TRANSPARENT);
+
+ UINT fmt = DT_SINGLELINE |
+#ifndef __WXWINCE__
+ DT_WORD_ELLIPSIS |
+#endif // __WXWINCE__
+ DT_NOPREFIX |
+ DT_VCENTER;
+
+ LV_COLUMN lvCol;
+ wxZeroMemory(lvCol);
+ lvCol.mask = LVCF_FMT;
+ if ( ListView_GetColumn(hwndList, col, &lvCol) )
+ {
+ switch ( lvCol.fmt & LVCFMT_JUSTIFYMASK )
+ {
+ case LVCFMT_LEFT:
+ fmt |= DT_LEFT;
+ break;
+
+ case LVCFMT_CENTER:
+ fmt |= DT_CENTER;
+ break;
+
+ case LVCFMT_RIGHT:
+ fmt |= DT_RIGHT;
+ break;
+ }
+ }
+ //else: failed to get alignment, assume it's DT_LEFT (default)
+
+ DrawText(hdc, text, -1, &rc, fmt);
+
+ return true;
+}
+
+static void HandleItemPostpaint(NMCUSTOMDRAW nmcd)
+{
+ if ( nmcd.uItemState & CDIS_FOCUS )
+ {
+ RECT rc = GetCustomDrawnItemRect(nmcd);
+
+ // don't use the provided HDC, it's in some strange state by now
+ ::DrawFocusRect(WindowHDC(nmcd.hdr.hwndFrom), &rc);
+ }
+}
+
+// pLVCD->clrText and clrTextBk should contain the colours to use
+static void HandleItemPaint(LPNMLVCUSTOMDRAW pLVCD, HFONT hfont)
+{
+ NMCUSTOMDRAW& nmcd = pLVCD->nmcd; // just a shortcut
+
+ const HWND hwndList = nmcd.hdr.hwndFrom;
+ const int item = nmcd.dwItemSpec;
+
+ // unfortunately we can't trust CDIS_SELECTED, it is often set even when
+ // the item is not at all selected for some reason (comctl32 6), but we
+ // also can't always trust ListView_GetItem() as it could return the old
+ // item status if we're called just after the (de)selection, so remember
+ // the last item to gain selection and also check for it here
+ for ( int i = -1;; )
+ {
+ i = ListView_GetNextItem(hwndList, i, LVNI_SELECTED);
+ if ( i == -1 )
+ {
+ nmcd.uItemState &= ~CDIS_SELECTED;
+ break;
+ }
+
+ if ( i == item )
+ {
+ nmcd.uItemState |= CDIS_SELECTED;
+ break;
+ }
+ }
+
+ // same thing for CDIS_FOCUS (except simpler as there is only one of them)
+ if ( ::GetFocus() == hwndList &&
+ ListView_GetNextItem(hwndList, (WPARAM)-1, LVNI_FOCUSED) == item )
+ {
+ nmcd.uItemState |= CDIS_FOCUS;
+ }
+ else
+ {
+ nmcd.uItemState &= ~CDIS_FOCUS;
+ }
+
+ if ( nmcd.uItemState & CDIS_SELECTED )
+ {
+ int syscolFg, syscolBg;
+ if ( ::GetFocus() == hwndList )
+ {
+ syscolFg = COLOR_HIGHLIGHTTEXT;
+ syscolBg = COLOR_HIGHLIGHT;
+ }
+ else // selected but unfocused
+ {
+ syscolFg = COLOR_WINDOWTEXT;
+ syscolBg = COLOR_BTNFACE;
+
+ // don't grey out the icon in this case neither
+ nmcd.uItemState &= ~CDIS_SELECTED;
+ }
+
+ pLVCD->clrText = ::GetSysColor(syscolFg);
+ pLVCD->clrTextBk = ::GetSysColor(syscolBg);
+ }
+ //else: not selected, use normal colours from pLVCD
+
+ HDC hdc = nmcd.hdc;
+ RECT rc = GetCustomDrawnItemRect(nmcd);
+
+ ::SetTextColor(hdc, pLVCD->clrText);
+ ::FillRect(hdc, &rc, AutoHBRUSH(pLVCD->clrTextBk));
+
+ // we could use CDRF_NOTIFYSUBITEMDRAW here but it results in weird repaint
+ // problems so just draw everything except the focus rect from here instead
+ const int colCount = Header_GetItemCount(ListView_GetHeader(hwndList));
+ for ( int col = 0; col < colCount; col++ )
+ {
+ pLVCD->iSubItem = col;
+ HandleSubItemPrepaint(pLVCD, hfont, colCount);
+ }
+
+ HandleItemPostpaint(nmcd);
+}
+
+static WXLPARAM HandleItemPrepaint(wxListCtrl *listctrl,
+ LPNMLVCUSTOMDRAW pLVCD,
+ wxListItemAttr *attr)
+{
+ if ( !attr )
+ {
+ // nothing to do for this item
+ return CDRF_DODEFAULT;
+ }
+
+
+ // set the colours to use for text drawing
+ pLVCD->clrText = attr->HasTextColour()
+ ? wxColourToRGB(attr->GetTextColour())
+ : wxColourToRGB(listctrl->GetTextColour());
+ pLVCD->clrTextBk = attr->HasBackgroundColour()
+ ? wxColourToRGB(attr->GetBackgroundColour())
+ : wxColourToRGB(listctrl->GetBackgroundColour());
+
+ // select the font if non default one is specified
+ if ( attr->HasFont() )
+ {
+ wxFont font = attr->GetFont();
+ if ( font.GetEncoding() != wxFONTENCODING_SYSTEM )
+ {
+ // the standard control ignores the font encoding/charset, at least
+ // with recent comctl32.dll versions (5 and 6, it uses to work with
+ // 4.something) so we have to draw the item entirely ourselves in
+ // this case
+ HandleItemPaint(pLVCD, GetHfontOf(font));
+ return CDRF_SKIPDEFAULT;
+ }
+
+ ::SelectObject(pLVCD->nmcd.hdc, GetHfontOf(font));
+
+ return CDRF_NEWFONT;
+ }
+
+ return CDRF_DODEFAULT;
+}
+
+WXLPARAM wxListCtrl::OnCustomDraw(WXLPARAM lParam)
+{
+ LPNMLVCUSTOMDRAW pLVCD = (LPNMLVCUSTOMDRAW)lParam;
+ NMCUSTOMDRAW& nmcd = pLVCD->nmcd;
+ switch ( nmcd.dwDrawStage )
+ {
+ case CDDS_PREPAINT:
+ // if we've got any items with non standard attributes,
+ // notify us before painting each item
+ //
+ // for virtual controls, always suppose that we have attributes as
+ // there is no way to check for this
+ if ( IsVirtual() || m_hasAnyAttr )
+ return CDRF_NOTIFYITEMDRAW;
+ break;
+
+ case CDDS_ITEMPREPAINT:
+ const int item = nmcd.dwItemSpec;
+
+ // we get this message with item == 0 for an empty control, we
+ // must ignore it as calling OnGetItemAttr() would be wrong
+ if ( item < 0 || item >= GetItemCount() )
+ break;
+
+ return HandleItemPrepaint(this, pLVCD, DoGetItemAttr(item));
+ }
+
+ return CDRF_DODEFAULT;
+}
+
+#endif // NM_CUSTOMDRAW supported
+
+// Necessary for drawing hrules and vrules, if specified
+void wxListCtrl::OnPaint(wxPaintEvent& event)
+{
+ bool drawHRules = HasFlag(wxLC_HRULES);
+ bool drawVRules = HasFlag(wxLC_VRULES);
+
+ if (!InReportView() || !drawHRules && !drawVRules)
+ {
+ event.Skip();
+ return;
+ }
+
+ wxPaintDC dc(this);
+
+ wxControl::OnPaint(event);
+
+ // Reset the device origin since it may have been set
+ dc.SetDeviceOrigin(0, 0);
+
+ wxPen pen(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
+ dc.SetPen(pen);
+ dc.SetBrush(* wxTRANSPARENT_BRUSH);
+
+ wxSize clientSize = GetClientSize();
+ wxRect itemRect;
+
+ int itemCount = GetItemCount();
+ int i;
+ if (drawHRules)
+ {
+ long top = GetTopItem();
+ for (i = top; i < top + GetCountPerPage() + 1; i++)
+ {
+ if (GetItemRect(i, itemRect))
+ {
+ int cy = itemRect.GetTop();
+ if (i != 0) // Don't draw the first one
+ {
+ dc.DrawLine(0, cy, clientSize.x, cy);
+ }
+ // Draw last line
+ if (i == itemCount - 1)
+ {
+ cy = itemRect.GetBottom();
+ dc.DrawLine(0, cy, clientSize.x, cy);
+ }
+ }
+ }
+ }
+ i = itemCount - 1;
+ if (drawVRules && (i > -1))
+ {
+ wxRect firstItemRect;
+ GetItemRect(0, firstItemRect);
+
+ if (GetItemRect(i, itemRect))
+ {
+ // this is a fix for bug 673394: erase the pixels which we would
+ // otherwise leave on the screen
+ static const int gap = 2;
+ dc.SetPen(*wxTRANSPARENT_PEN);
+ dc.SetBrush(wxBrush(GetBackgroundColour()));
+ dc.DrawRectangle(0, firstItemRect.GetY() - gap,
+ clientSize.GetWidth(), gap);
+
+ dc.SetPen(pen);
+ dc.SetBrush(*wxTRANSPARENT_BRUSH);
+
+ int numCols = GetColumnCount();
+ int* indexArray = new int[numCols];
+ if ( !ListView_GetColumnOrderArray( GetHwnd(), numCols, indexArray) )
+ {
+ wxFAIL_MSG( _T("invalid column index array in OnPaint()") );
+ }
+
+ int x = itemRect.GetX();
+ for (int col = 0; col < numCols; col++)
+ {
+ int colWidth = GetColumnWidth(indexArray[col]);
+ x += colWidth ;
+ dc.DrawLine(x-1, firstItemRect.GetY() - gap,
+ x-1, itemRect.GetBottom());
+ }
+
+ delete indexArray;
+ }
+ }
+}
+
+WXLRESULT
+wxListCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+{
+ switch ( nMsg )
+ {
+#ifdef WM_PRINT
+ case WM_PRINT:
+ // we should bypass our own WM_PRINT handling as we don't handle
+ // PRF_CHILDREN flag, so leave it to the native control itself
+ return MSWDefWindowProc(nMsg, wParam, lParam);
+#endif // WM_PRINT
+
+ case WM_CONTEXTMENU:
+ // because this message is propagated upwards the child-parent
+ // chain, we get it for the right clicks on the header window but
+ // this is confusing in wx as right clicking there already
+ // generates a separate wxEVT_COMMAND_LIST_COL_RIGHT_CLICK event
+ // so just ignore them
+ if ( (HWND)wParam == ListView_GetHeader(GetHwnd()) )
+ return 0;
+ //else: break
+ }
+
+ return wxControl::MSWWindowProc(nMsg, wParam, lParam);
+}
+
+// ----------------------------------------------------------------------------
+// virtual list controls
+// ----------------------------------------------------------------------------
+
+wxString wxListCtrl::OnGetItemText(long WXUNUSED(item), long WXUNUSED(col)) const
+{
+ // this is a pure virtual function, in fact - which is not really pure
+ // because the controls which are not virtual don't need to implement it
+ wxFAIL_MSG( _T("wxListCtrl::OnGetItemText not supposed to be called") );
+
+ return wxEmptyString;
+}
+
+int wxListCtrl::OnGetItemImage(long WXUNUSED(item)) const
+{
+ wxCHECK_MSG(!GetImageList(wxIMAGE_LIST_SMALL),
+ -1,
+ wxT("List control has an image list, OnGetItemImage or OnGetItemColumnImage should be overridden."));
+ return -1;
+}
+
+int wxListCtrl::OnGetItemColumnImage(long item, long column) const
+{
+ if (!column)
+ return OnGetItemImage(item);
+
+ return -1;
+}
+
+wxListItemAttr *wxListCtrl::OnGetItemAttr(long WXUNUSED_UNLESS_DEBUG(item)) const
+{
+ wxASSERT_MSG( item >= 0 && item < GetItemCount(),
+ _T("invalid item index in OnGetItemAttr()") );
+
+ // no attributes by default
+ return NULL;
+}
+
+wxListItemAttr *wxListCtrl::DoGetItemAttr(long item) const
+{
+ return IsVirtual() ? OnGetItemAttr(item)
+ : wxGetInternalDataAttr(this, item);
+}
+
+void wxListCtrl::SetItemCount(long count)
+{
+ wxASSERT_MSG( IsVirtual(), _T("this is for virtual controls only") );
+
+ if ( !::SendMessage(GetHwnd(), LVM_SETITEMCOUNT, (WPARAM)count,
+ LVSICF_NOSCROLL | LVSICF_NOINVALIDATEALL) )
+ {
+ wxLogLastError(_T("ListView_SetItemCount"));
+ }
+ m_count = count;
+ wxASSERT_MSG( m_count == ListView_GetItemCount(GetHwnd()),
+ wxT("m_count should match ListView_GetItemCount"));
+}
+
+void wxListCtrl::RefreshItem(long item)
+{
+ RefreshItems(item, item);
+}
+
+void wxListCtrl::RefreshItems(long itemFrom, long itemTo)
+{
+ ListView_RedrawItems(GetHwnd(), itemFrom, itemTo);
+}
+
+// ----------------------------------------------------------------------------
+// internal data stuff
+// ----------------------------------------------------------------------------
+
+static wxListItemInternalData *wxGetInternalData(HWND hwnd, long itemId)
+{
+ LV_ITEM it;
+ it.mask = LVIF_PARAM;
+ it.iItem = itemId;
+
+ if ( !ListView_GetItem(hwnd, &it) )
+ return NULL;
+
+ return (wxListItemInternalData *) it.lParam;
+}
+
+static
+wxListItemInternalData *wxGetInternalData(const wxListCtrl *ctl, long itemId)
+{
+ return wxGetInternalData(GetHwndOf(ctl), itemId);
+}
+
+static
+wxListItemAttr *wxGetInternalDataAttr(const wxListCtrl *ctl, long itemId)
+{
+ wxListItemInternalData *data = wxGetInternalData(ctl, itemId);
+
+ return data ? data->attr : NULL;
+}
+
+static void wxDeleteInternalData(wxListCtrl* ctl, long itemId)
+{
+ wxListItemInternalData *data = wxGetInternalData(ctl, itemId);
+ if (data)
+ {
+ LV_ITEM item;
+ memset(&item, 0, sizeof(item));
+ item.iItem = itemId;
+ item.mask = LVIF_PARAM;
+ item.lParam = (LPARAM) 0;
+ ListView_SetItem((HWND)ctl->GetHWND(), &item);
+ delete data;
+ }
+}
+
+// ----------------------------------------------------------------------------
+// wxWin <-> MSW items conversions
+// ----------------------------------------------------------------------------
+
+static void wxConvertFromMSWListItem(HWND hwndListCtrl,
+ wxListItem& info,
+ LV_ITEM& lvItem)
+{
+ wxListItemInternalData *internaldata =
+ (wxListItemInternalData *) lvItem.lParam;
+
+ if (internaldata)
+ info.m_data = internaldata->lParam;
+
+ info.m_mask = 0;
+ info.m_state = 0;
+ info.m_stateMask = 0;
+ info.m_itemId = lvItem.iItem;
+
+ long oldMask = lvItem.mask;
+
+ bool needText = false;
+ if (hwndListCtrl != 0)
+ {
+ if ( lvItem.mask & LVIF_TEXT )
+ needText = false;
+ else
+ needText = true;
+
+ if ( needText )
+ {
+ lvItem.pszText = new wxChar[513];
+ lvItem.cchTextMax = 512;
+ }
+ lvItem.mask |= LVIF_TEXT | LVIF_IMAGE | LVIF_PARAM;
+ ::SendMessage(hwndListCtrl, LVM_GETITEM, 0, (LPARAM)& lvItem);
+ }
+
+ if ( lvItem.mask & LVIF_STATE )
+ {
+ info.m_mask |= wxLIST_MASK_STATE;
+
+ if ( lvItem.stateMask & LVIS_CUT)
+ {
+ info.m_stateMask |= wxLIST_STATE_CUT;
+ if ( lvItem.state & LVIS_CUT )
+ info.m_state |= wxLIST_STATE_CUT;
+ }
+ if ( lvItem.stateMask & LVIS_DROPHILITED)
+ {
+ info.m_stateMask |= wxLIST_STATE_DROPHILITED;
+ if ( lvItem.state & LVIS_DROPHILITED )
+ info.m_state |= wxLIST_STATE_DROPHILITED;
+ }
+ if ( lvItem.stateMask & LVIS_FOCUSED)
+ {
+ info.m_stateMask |= wxLIST_STATE_FOCUSED;
+ if ( lvItem.state & LVIS_FOCUSED )
+ info.m_state |= wxLIST_STATE_FOCUSED;
+ }
+ if ( lvItem.stateMask & LVIS_SELECTED)
+ {
+ info.m_stateMask |= wxLIST_STATE_SELECTED;
+ if ( lvItem.state & LVIS_SELECTED )
+ info.m_state |= wxLIST_STATE_SELECTED;
+ }
+ }
+
+ if ( lvItem.mask & LVIF_TEXT )
+ {
+ info.m_mask |= wxLIST_MASK_TEXT;
+ info.m_text = lvItem.pszText;
+ }
+ if ( lvItem.mask & LVIF_IMAGE )
+ {
+ info.m_mask |= wxLIST_MASK_IMAGE;
+ info.m_image = lvItem.iImage;
+ }
+ if ( lvItem.mask & LVIF_PARAM )
+ info.m_mask |= wxLIST_MASK_DATA;
+ if ( lvItem.mask & LVIF_DI_SETITEM )
+ info.m_mask |= wxLIST_SET_ITEM;
+ info.m_col = lvItem.iSubItem;
+
+ if (needText)
+ {
+ if (lvItem.pszText)
+ delete[] lvItem.pszText;
+ }
+ lvItem.mask = oldMask;
+}
+
+static void wxConvertToMSWFlags(long state, long stateMask, LV_ITEM& lvItem)
+{
+ if (stateMask & wxLIST_STATE_CUT)
+ {
+ lvItem.stateMask |= LVIS_CUT;
+ if (state & wxLIST_STATE_CUT)
+ lvItem.state |= LVIS_CUT;
+ }
+ if (stateMask & wxLIST_STATE_DROPHILITED)
+ {
+ lvItem.stateMask |= LVIS_DROPHILITED;
+ if (state & wxLIST_STATE_DROPHILITED)
+ lvItem.state |= LVIS_DROPHILITED;
+ }
+ if (stateMask & wxLIST_STATE_FOCUSED)
+ {
+ lvItem.stateMask |= LVIS_FOCUSED;
+ if (state & wxLIST_STATE_FOCUSED)
+ lvItem.state |= LVIS_FOCUSED;
+ }
+ if (stateMask & wxLIST_STATE_SELECTED)
+ {
+ lvItem.stateMask |= LVIS_SELECTED;
+ if (state & wxLIST_STATE_SELECTED)
+ lvItem.state |= LVIS_SELECTED;
+ }
+}
+
+static void wxConvertToMSWListItem(const wxListCtrl *ctrl,
+ const wxListItem& info,
+ LV_ITEM& lvItem)
+{
+ lvItem.iItem = (int) info.m_itemId;
+
+ lvItem.iImage = info.m_image;
+ lvItem.stateMask = 0;
+ lvItem.state = 0;
+ lvItem.mask = 0;
+ lvItem.iSubItem = info.m_col;
+
+ if (info.m_mask & wxLIST_MASK_STATE)
+ {
+ lvItem.mask |= LVIF_STATE;
+
+ wxConvertToMSWFlags(info.m_state, info.m_stateMask, lvItem);
+ }
+
+ if (info.m_mask & wxLIST_MASK_TEXT)
+ {
+ lvItem.mask |= LVIF_TEXT;
+ if ( ctrl->HasFlag(wxLC_USER_TEXT) )
+ {
+ lvItem.pszText = LPSTR_TEXTCALLBACK;
+ }
+ else
+ {
+ // pszText is not const, hence the cast
+ lvItem.pszText = (wxChar *)info.m_text.wx_str();
+ if ( lvItem.pszText )
+ lvItem.cchTextMax = info.m_text.length();
+ else
+ lvItem.cchTextMax = 0;
+ }
+ }
+ if (info.m_mask & wxLIST_MASK_IMAGE)
+ lvItem.mask |= LVIF_IMAGE;
+}
+
+static void wxConvertToMSWListCol(HWND hwndList,
+ int col,
+ const wxListItem& item,
+ LV_COLUMN& lvCol)
+{
+ wxZeroMemory(lvCol);
+
+ if ( item.m_mask & wxLIST_MASK_TEXT )
+ {
+ lvCol.mask |= LVCF_TEXT;
+ lvCol.pszText = (wxChar *)item.m_text.wx_str(); // cast is safe
+ }
+
+ if ( item.m_mask & wxLIST_MASK_FORMAT )
+ {
+ lvCol.mask |= LVCF_FMT;
+
+ if ( item.m_format == wxLIST_FORMAT_LEFT )
+ lvCol.fmt = LVCFMT_LEFT;
+ else if ( item.m_format == wxLIST_FORMAT_RIGHT )
+ lvCol.fmt = LVCFMT_RIGHT;
+ else if ( item.m_format == wxLIST_FORMAT_CENTRE )
+ lvCol.fmt = LVCFMT_CENTER;
+ }
+
+ if ( item.m_mask & wxLIST_MASK_WIDTH )
+ {
+ lvCol.mask |= LVCF_WIDTH;
+ if ( item.m_width == wxLIST_AUTOSIZE)
+ lvCol.cx = LVSCW_AUTOSIZE;
+ else if ( item.m_width == wxLIST_AUTOSIZE_USEHEADER)
+ lvCol.cx = LVSCW_AUTOSIZE_USEHEADER;
+ else
+ lvCol.cx = item.m_width;
+ }
+
+ // see comment at the end of wxListCtrl::GetColumn()
+#ifdef NM_CUSTOMDRAW // _WIN32_IE >= 0x0300
+ if ( item.m_mask & wxLIST_MASK_IMAGE )
+ {
+ if ( wxApp::GetComCtl32Version() >= 470 )
+ {
+ lvCol.mask |= LVCF_IMAGE;
+
+ // we use LVCFMT_BITMAP_ON_RIGHT because the images on the right
+ // seem to be generally nicer than on the left and the generic
+ // version only draws them on the right (we don't have a flag to
+ // specify the image location anyhow)
+ //
+ // we don't use LVCFMT_COL_HAS_IMAGES because it doesn't seem to
+ // make any difference in my tests -- but maybe we should?
+ if ( item.m_image != -1 )
+ {
+ // as we're going to overwrite the format field, get its
+ // current value first -- unless we want to overwrite it anyhow
+ if ( !(lvCol.mask & LVCF_FMT) )
+ {
+ LV_COLUMN lvColOld;
+ wxZeroMemory(lvColOld);
+ lvColOld.mask = LVCF_FMT;
+ if ( ListView_GetColumn(hwndList, col, &lvColOld) )
+ {
+ lvCol.fmt = lvColOld.fmt;
+ }
+
+ lvCol.mask |= LVCF_FMT;
+ }
+
+ lvCol.fmt |= LVCFMT_BITMAP_ON_RIGHT | LVCFMT_IMAGE;
+ }
+
+ lvCol.iImage = item.m_image;
+ }
+ //else: it doesn't support item images anyhow
+ }
+#endif // _WIN32_IE >= 0x0300
+}
+
+#endif // wxUSE_LISTCTRL
projects / wxWidgets.git / blobdiff