scintillawx.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

const int H_SCROLL_STEP = 20;

bool ScintillaWX::ModifyScrollBars(int nMax, int nPage) {
    bool modified = false;

    int vertEnd = nMax;
    if (!verticalScrollBarVisible)
        vertEnd = 0;

    // Check the vertical scrollbar
    if (stc->m_vScrollBar == NULL) {  // Use built-in scrollbar
        int  sbMax    = stc->GetScrollRange(wxVERTICAL);
        int  sbThumb  = stc->GetScrollThumb(wxVERTICAL);
        int  sbPos    = stc->GetScrollPos(wxVERTICAL);
        if (sbMax != vertEnd || sbThumb != nPage) {
            stc->SetScrollbar(wxVERTICAL, sbPos, nPage, vertEnd+1);
            modified = true;
        }
    }
    else { // otherwise use the one that's been given to us
        int  sbMax    = stc->m_vScrollBar->GetRange();
        int  sbPage   = stc->m_vScrollBar->GetPageSize();
        int  sbPos    = stc->m_vScrollBar->GetThumbPosition();
        if (sbMax != vertEnd || sbPage != nPage) {
            stc->m_vScrollBar->SetScrollbar(sbPos, nPage, vertEnd+1, nPage);
            modified = true;
        }
    }


    // Check the horizontal scrollbar
    PRectangle rcText = GetTextRectangle();
    int horizEnd = scrollWidth;
    if (horizEnd < 0)
        horizEnd = 0;
    if (!horizontalScrollBarVisible || (wrapState != eWrapNone))
        horizEnd = 0;
    int pageWidth = rcText.Width();

    if (stc->m_hScrollBar == NULL) {  // Use built-in scrollbar
        int sbMax    = stc->GetScrollRange(wxHORIZONTAL);
        int sbThumb  = stc->GetScrollThumb(wxHORIZONTAL);
        int sbPos    = stc->GetScrollPos(wxHORIZONTAL);
        if ((sbMax != horizEnd) || (sbThumb != pageWidth) || (sbPos != 0)) {
            stc->SetScrollbar(wxHORIZONTAL, sbPos, pageWidth, horizEnd);
            modified = true;
            if (scrollWidth < pageWidth) {
                HorizontalScrollTo(0);
            }
        }
    }
    else { // otherwise use the one that's been given to us
        int sbMax    = stc->m_hScrollBar->GetRange();
        int sbThumb  = stc->m_hScrollBar->GetPageSize();
        int sbPos    = stc->m_hScrollBar->GetThumbPosition();
        if ((sbMax != horizEnd) || (sbThumb != pageWidth) || (sbPos != 0)) {
            stc->m_hScrollBar->SetScrollbar(sbPos, pageWidth, horizEnd, pageWidth);
            modified = true;
            if (scrollWidth < pageWidth) {
                HorizontalScrollTo(0);
            }
        }
    }

    return modified;
}


void ScintillaWX::NotifyChange() {
    stc->NotifyChange();
}


void ScintillaWX::NotifyParent(SCNotification scn) {
    stc->NotifyParent(&scn);
}


// This method is overloaded from ScintillaBase in order to prevent the
// AutoComplete window from being destroyed when it gets the focus.  There is
// a side effect that the AutoComp will also not be destroyed when switching
// to another window, but I think that is okay.
void ScintillaWX::CancelModes() {
    if (! focusEvent)
        AutoCompleteCancel();
    ct.CallTipCancel();
    Editor::CancelModes();
}



void ScintillaWX::Copy() {
    if (currentPos != anchor) {
        SelectionText st;
        CopySelectionRange(&st);
        CopyToClipboard(st);
    }
}


void ScintillaWX::Paste() {
    pdoc->BeginUndoAction();
    ClearSelection();

#if wxUSE_DATAOBJ
    wxTextDataObject data;
    bool gotData = false;

    if (wxTheClipboard->Open()) {
        wxTheClipboard->UsePrimarySelection(false);
        gotData = wxTheClipboard->GetData(data);
        wxTheClipboard->Close();
    }
    if (gotData) {
        wxString   text = wxTextBuffer::Translate(data.GetText(),
                                                  wxConvertEOLMode(pdoc->eolMode));
        wxWX2MBbuf buf = (wxWX2MBbuf)wx2stc(text);

#if wxUSE_UNICODE
        // free up the old character buffer in case the text is real big
        data.SetText(wxEmptyString); 
        text = wxEmptyString;
#endif
        int len = strlen(buf);
        pdoc->InsertString(currentPos, buf, len);
        SetEmptySelection(currentPos + len);
    }
#endif // wxUSE_DATAOBJ

    pdoc->EndUndoAction();
    NotifyChange();
    Redraw();
}


void ScintillaWX::CopyToClipboard(const SelectionText& st) {
#if wxUSE_CLIPBOARD
    if (wxTheClipboard->Open()) {
        wxTheClipboard->UsePrimarySelection(false);
        wxString text = wxTextBuffer::Translate(stc2wx(st.s, st.len-1));
        wxTheClipboard->SetData(new wxTextDataObject(text));
        wxTheClipboard->Close();
    }
#else
    wxUnusedVar(st);
#endif // wxUSE_CLIPBOARD
}


bool ScintillaWX::CanPaste() {
#if wxUSE_CLIPBOARD
    bool canPaste = false;
    bool didOpen;

    if (Editor::CanPaste()) {
        didOpen = !wxTheClipboard->IsOpened();
        if ( didOpen )
            wxTheClipboard->Open();

        if (wxTheClipboard->IsOpened()) {
            wxTheClipboard->UsePrimarySelection(false);
            canPaste = wxTheClipboard->IsSupported(wxUSE_UNICODE ? wxDF_UNICODETEXT : wxDF_TEXT);
            if (didOpen)
                wxTheClipboard->Close();
        }
    }
    return canPaste;
#else
    return false;
#endif // wxUSE_CLIPBOARD
}

void ScintillaWX::CreateCallTipWindow(PRectangle) {
    if (! ct.wCallTip.Created() ) {
        ct.wCallTip = new wxSTCCallTip(stc, &ct, this);
        ct.wDraw = ct.wCallTip;
    }
}


void ScintillaWX::AddToPopUp(const char *label, int cmd, bool enabled) {
    if (!label[0])
        ((wxMenu*)popup.GetID())->AppendSeparator();
    else
        ((wxMenu*)popup.GetID())->Append(cmd, wxGetTranslation(stc2wx(label)));

    if (!enabled)
        ((wxMenu*)popup.GetID())->Enable(cmd, enabled);
}


// This is called by the Editor base class whenever something is selected
void ScintillaWX::ClaimSelection() {
#if 0
    // Until wxGTK is able to support using both the primary selection and the
    // clipboard at the same time I think it causes more problems than it is
    // worth to implement this method.  Selecting text should not clear the
    // clipboard.  --Robin
#ifdef __WXGTK__
    // Put the selected text in the PRIMARY selection
    if (currentPos != anchor) {
        SelectionText st;
        CopySelectionRange(&st);
        if (wxTheClipboard->Open()) {
            wxTheClipboard->UsePrimarySelection(true);
            wxString text = stc2wx(st.s, st.len);
            wxTheClipboard->SetData(new wxTextDataObject(text));
            wxTheClipboard->UsePrimarySelection(false);
            wxTheClipboard->Close();
        }
    }
#endif
#endif
}


void ScintillaWX::UpdateSystemCaret() {
#ifdef __WXMSW__
    if (hasFocus) {
        if (HasCaretSizeChanged()) {
            DestroySystemCaret();
            CreateSystemCaret();
        }
        Point pos = LocationFromPosition(currentPos);
        ::SetCaretPos(pos.x, pos.y);
    }
#endif
}


bool ScintillaWX::HasCaretSizeChanged() {
#ifdef __WXMSW__
    if (( (0 != vs.caretWidth) && (sysCaretWidth != vs.caretWidth) )
        || (0 != vs.lineHeight) && (sysCaretHeight != vs.lineHeight)) {
        return true;
    }
#endif
    return false;
}

bool ScintillaWX::CreateSystemCaret() {
#ifdef __WXMSW__
    sysCaretWidth = vs.caretWidth;
    if (0 == sysCaretWidth) {
        sysCaretWidth = 1;
    }
    sysCaretHeight = vs.lineHeight;
    int bitmapSize = (((sysCaretWidth + 15) & ~15) >> 3) * sysCaretHeight;
    char *bits = new char[bitmapSize];
    memset(bits, 0, bitmapSize);
    sysCaretBitmap = ::CreateBitmap(sysCaretWidth, sysCaretHeight, 1,
                                    1, reinterpret_cast<BYTE *>(bits));
    delete [] bits;
    BOOL retval = ::CreateCaret(GetHwndOf(stc), sysCaretBitmap,
                                sysCaretWidth, sysCaretHeight);
    ::ShowCaret(GetHwndOf(stc));
    return retval != 0;
#else
    return false;
#endif
}

bool ScintillaWX::DestroySystemCaret() {
#ifdef __WXMSW__
    ::HideCaret(GetHwndOf(stc));
    BOOL retval = ::DestroyCaret();
    if (sysCaretBitmap) {
        ::DeleteObject(sysCaretBitmap);
        sysCaretBitmap = 0;
    }
    return retval != 0;
#else
    return false;
#endif
}


//----------------------------------------------------------------------


long ScintillaWX::DefWndProc(unsigned int /*iMessage*/, unsigned long /*wParam*/, long /*lParam*/) {
    return 0;
}

long ScintillaWX::WndProc(unsigned int iMessage, unsigned long wParam, long lParam) {
      switch (iMessage) {
      case SCI_CALLTIPSHOW: {
          // NOTE: This is copied here from scintilla/src/ScintillaBase.cxx
          // because of the little tweak that needs done below for wxGTK.
          // When updating new versions double check that this is still
          // needed, and that any new code there is copied here too.
          Point pt = LocationFromPosition(wParam);
          char* defn = reinterpret_cast<char *>(lParam);
          AutoCompleteCancel();
          pt.y += vs.lineHeight;
          PRectangle rc = ct.CallTipStart(currentPos, pt,
                                          defn,
                                          vs.styles[STYLE_DEFAULT].fontName,
                                          vs.styles[STYLE_DEFAULT].sizeZoomed,
                                          CodePage(),
                                          vs.styles[STYLE_DEFAULT].characterSet,
                                          wMain);
          // If the call-tip window would be out of the client
          // space, adjust so it displays above the text.
          PRectangle rcClient = GetClientRectangle();
          if (rc.bottom > rcClient.bottom) {
#ifdef __WXGTK__
              int offset = int(vs.lineHeight * 1.25)  + rc.Height();
#else
              int offset = vs.lineHeight + rc.Height();
#endif
              rc.top -= offset;
              rc.bottom -= offset;
          }
          // Now display the window.
          CreateCallTipWindow(rc);
          ct.wCallTip.SetPositionRelative(rc, wMain);
          ct.wCallTip.Show();
          break;
      }

#ifdef SCI_LEXER
      case SCI_LOADLEXERLIBRARY:
            LexerManager::GetInstance()->Load((const char*)lParam);
            break;
#endif

      default:
          return ScintillaBase::WndProc(iMessage, wParam, lParam);
      }
      return 0;
}



//----------------------------------------------------------------------
// Event delegates

void ScintillaWX::DoPaint(wxDC* dc, wxRect rect) {

    paintState = painting;
    Surface* surfaceWindow = Surface::Allocate();
    surfaceWindow->Init(dc, wMain.GetID());
    rcPaint = PRectangleFromwxRect(rect);
    PRectangle rcClient = GetClientRectangle();
    paintingAllText = rcPaint.Contains(rcClient);

    ClipChildren(*dc, rcPaint);
    Paint(surfaceWindow, rcPaint);

    delete surfaceWindow;
    if (paintState == paintAbandoned) {
        // Painting area was insufficient to cover new styling or brace
        // highlight positions
        FullPaint();
    }
    paintState = notPainting;
}


void ScintillaWX::DoHScroll(int type, int pos) {
    int xPos = xOffset;
    PRectangle rcText = GetTextRectangle();
    int pageWidth = rcText.Width() * 2 / 3;
    if (type == wxEVT_SCROLLWIN_LINEUP || type == wxEVT_SCROLL_LINEUP)
        xPos -= H_SCROLL_STEP;
    else if (type == wxEVT_SCROLLWIN_LINEDOWN || type == wxEVT_SCROLL_LINEDOWN)
        xPos += H_SCROLL_STEP;
    else if (type == wxEVT_SCROLLWIN_PAGEUP || type == wxEVT_SCROLL_PAGEUP)