使用MSHTML 對 Html 進行DOM 操作(放縮,顏色...)，HTML抓圖(放縮，滾動，拼接)

以前的代碼，使用ATL會更整潔

?

//? 放縮抓圖

void CPageCaptureView::GetZoomPageDC()
{
??? LONG lWidth = WINDOW_WIDTH;
??? LONG lHeight = WINDOW_HEIGHT;
??? BOOL bMargin = TRUE;
??? IOleWindow *InterfacePtr = NULL;
??? IHTMLDocument2* pDoc = NULL;
??? IHTMLElement* pBodyElem = NULL;
??? IHTMLBodyElement* pBody = NULL;
??? IHTMLElement2* pBodyElement2=NULL;
??? IHTMLStyle* pStyle = NULL;
??? IHTMLStyle3 *pStyle3=NULL;
??? LPDISPATCH pDisp = NULL;
??? IOleObject * pObj = NULL;
??? HRESULT hr = S_OK;

??? pDisp = GetHtmlDocument();
??? ASSERT(pDisp);
??? if (pDisp)
??? {
??? ??? hr = pDisp->QueryInterface(IID_IHTMLDocument2,(void**)&pDoc);
??? ??? if (SUCCEEDED(hr)&&pDoc)
??? ??? {
??? ??? ??? hr = pDoc->get_body(&pBodyElem);
??? ??? ??? if (SUCCEEDED(hr)&&pBodyElem)
??? ??? ??? {
??? ??? ??? ??? // hide 3D border
??? ??? ??? ??? hr =pBodyElem->get_style(&pStyle);
??? ??? ??? ??? if (SUCCEEDED(hr)&&pStyle)
??? ??? ??? ??? {
??? ??? ??? ??? ??? pStyle->put_borderStyle(CComBSTR("none"));
??? ??? ??? ??? ??? hr = pStyle->QueryInterface(IID_IHTMLStyle3,(void**)&pStyle3);
??? ??? ??? ??? ??? if (SUCCEEDED(hr&&pStyle3))
??? ??? ??? ??? ??? {
??? ??? ??? ??? ??? ??? CString str(ZOOM);
??? ??? ??? ??? ??? ??? BSTR bStr = str.AllocSysString();
??? ??? ??? ??? ??? ??? VARIANT var;
??? ??? ??? ??? ??? ??? var.vt = VT_BSTR;
??? ??? ??? ??? ??? ??? var.bstrVal= bStr;
??? ??? ??? ??? ??? ??? pStyle3->put_zoom(var);???
??? ??? ??? ??? ??? ??? if (bStr)
??? ??? ??? ??? ??? ??? {
??? ??? ??? ??? ??? ??? ??? SysFreeString(bStr);
??? ??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? ??? pStyle3->Release();
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? pStyle->Release();
??? ??? ??? ??? }???
??? ??? ??? ??? // hide scroll bars
??? ??? ??? ??? hr = pBodyElem->QueryInterface(IID_IHTMLBodyElement, (void**)&pBody);
??? ??? ??? ??? if (SUCCEEDED(hr)&&pBody)
??? ??? ??? ??? {
??? ??? ??? ??? ??? pBody->put_scroll(CComBSTR("no"));
??? ??? ??? ??? ??? pBody->Release();
??? ??? ??? ??? }
??? ??? ??? ??? // get dimension and resize
??? ??? ??? ??? hr = pBodyElem->QueryInterface(IID_IHTMLElement2, (void**)&pBodyElement2);
??? ??? ??? ??? if (SUCCEEDED(hr)&&pBodyElement2)
??? ??? ??? ??? {
??? ??? ??? ??? ??? long iScrollWidth = 0,iScrollHeight = 0,
??? ??? ??? ??? ??? ??? iClientWidth = 0,iClientHeight = 0;
??? ??? ??? ??? ??? pBodyElement2->get_scrollWidth(&iScrollWidth);
??? ??? ??? ??? ??? pBodyElement2->get_scrollHeight(&iScrollHeight);
??? ??? ??? ??? ??? pBodyElement2->get_clientWidth(&iClientWidth);
??? ??? ??? ??? ??? pBodyElement2->get_clientHeight(&iClientHeight);
??? ??? ??? ??? ??? CString strZoom(ZOOM);
??? ??? ??? ??? ??? strZoom.Replace("%","");
??? ??? ??? ??? ??? float fZoom = atof(strZoom)/100.0;
??? ??? ??? ??? ??? if (iScrollWidth>iClientWidth)
??? ??? ??? ??? ??? {
??? ??? ??? ??? ??? ??? lWidth =? fZoom * iScrollWidth;??? ???
??? ??? ??? ??? ??? ??? bMargin = FALSE;
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? if (iScrollHeight>iClientHeight)
??? ??? ??? ??? ??? {
??? ??? ??? ??? ??? ??? lHeight = fZoom * iScrollHeight;
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? SetWindowPos(NULL,0,0,lWidth,lHeight,SWP_HIDEWINDOW);?
??? ??? ??? ??? ??? pBodyElement2->Release();
??? ??? ??? ??? }

??? ??? ??? ??? LONG lBmpWidth = lWidth;
??? ??? ??? ??? LONG lBmpHeight = lHeight;
??? ??? ??? ??? LONG lMarginLeft = 50, lMarginRight = 50, lMarginTop? = 35, lMarginBottom? = 35;

??? ??? ??? ??? if (lBmpWidth > lBmpHeight*ASPECT_RADIO)
??? ??? ??? ??? {
??? ??? ??? ??? ??? lBmpHeight = lBmpWidth/ASPECT_RADIO;
??? ??? ??? ??? }
??? ??? ??? ??? else
??? ??? ??? ??? {
??? ??? ??? ??? ??? lBmpWidth = lBmpHeight*ASPECT_RADIO;
??? ??? ??? ??? }
??? ??? ??? ??? if (!bMargin)
??? ??? ??? ??? {
??? ??? ??? ??? ??? lMarginLeft = lMarginRight = lMarginTop = lMarginBottom = 0;
??? ??? ??? ??? ??? lBmpWidth = lWidth;
??? ??? ??? ??? ??? lBmpHeight = lHeight;
??? ??? ??? ??? }
??? ??? ??? ??? LONG lPageWidth = lBmpWidth + lMarginLeft + lMarginRight;
??? ??? ??? ??? LONG lPageHeight = lBmpHeight + lMarginTop + lMarginBottom;

??? ??? ??? ??? // resize ole
??? ??? ??? ??? hr = m_pBrowserApp->QueryInterface(IID_IOleObject,(void**)&pObj);
??? ??? ??? ??? if (SUCCEEDED(hr)&&pObj)
??? ??? ??? ??? {
??? ??? ??? ??? ??? SIZEL size ={lWidth,lHeight};
??? ??? ??? ??? ??? pObj->SetExtent(DVASPECT_CONTENT,&size);
??? ??? ??? ??? ??? pObj->Release();
??? ??? ??? ??? }

??? ??? ??? ??? //Draw
??? ??? ??? ??? HDC hScreenDC = ::GetDC(NULL);
??? ??? ??? ??? HDC hDrawDC = CreateCompatibleDC(NULL);
// ??? ??? ??? ??? SIZE PrevExt1, PrevExt2;
// ??? ??? ??? ??? SetMapMode(hImageDC, MM_HIENGLISH);
// ??? ??? ??? ??? GetWindowExtEx(hImageDC, &PrevExt1);
// ??? ??? ??? ??? GetViewportExtEx(hImageDC, &PrevExt2);
// ??? ??? ??? ???
// ??? ??? ??? ??? PrevExt1.cx *= 0.6;
// ??? ??? ??? ??? PrevExt1.cy *= 0.6;
// ??? ??? ??? ??? SetMapMode(hImageDC, MM_ISOTROPIC);
// ??? ??? ??? ??? SetWindowExtEx(hImageDC, PrevExt1.cx, PrevExt1.cy, NULL);??? //600DPI
// ??? ??? ??? ??? SetViewportOrgEx(hImageDC, 0, 0, NULL);
// ??? ??? ??? ??? SetViewportExtEx(hImageDC, PrevExt2.cx, -PrevExt2.cy, NULL);

??? ??? ??? ??? HBITMAP hDrawBmp = NULL;
??? ??? ??? ??? hDrawBmp = CreateCompatibleBitmap(hScreenDC, lWidth,
??? ??? ??? ??? ??? lHeight);
??? ??? ??? ??? if(!hDrawBmp)
???????????????????? return;
??? ??? ??? ??? HGDIOBJ hOld = SelectObject(hDrawDC, hDrawBmp);
??? ??? ??? ??? RECT rt = {0,0,lWidth,lHeight};
??? ??? ??? ??? HBRUSH hBrush = (HBRUSH)GetStockObject(WHITE_BRUSH);
??? ??? ??? ??? FillRect(hDrawDC,&rt,hBrush);
??? ??? ??? ??? RECT rcSource={0,0,lWidth,lHeight};??? ??? ???
??? ??? ??? ??? OleDraw(m_pBrowserApp,DVASPECT_CONTENT,hDrawDC,&rcSource);

??? ??? ??? ??? HANDLE hDibNew = pDib->CreateDib(lPageWidth,lPageHeight,NULL, 24);
??? ??? ??? ??? if (pDib->hdib)
??? ??? ??? ??? {
??? ??? ??? ??? ??? GlobalFree(pDib->hdib);
??? ??? ??? ??? ??? pDib->hdib = NULL;
??? ??? ??? ??? }
??? ??? ??? ??? if (hDibNew)
??? ??? ??? ??? {
??? ??? ??? ??? ??? pDib->CreateDibFromHandle(hDibNew);
??? ??? ??? ??? }
??? ??? ??? ??? CDrawDib dib;
??? ??? ??? ??? HANDLE handle = NULL;
??? ??? ??? ??? handle = dib.DibFromBitmap(hDrawBmp,BI_RGB,24,NULL);

??? ??? ??? ??? if (handle&&pDib)
??? ??? ??? ??? {
??? ??? ??? ??? ??? pDib->BitBlts(lMarginLeft+(lBmpWidth-lWidth)/2.0,lMarginTop+(lBmpHeight-lHeight)/2.0,
??? ??? ??? ??? ??? ??? handle);
??? ??? ??? ??? ??? GlobalFree(handle);
??? ??? ??? ??? }? ??? ???
??? ??? ??? ??? ::DeleteObject(hBrush);
??? ??? ??? ??? ::DeleteObject(hDrawBmp);
??? ??? ??? ??? ::ReleaseDC(0, hScreenDC);
??? ??? ??? ??? ::DeleteDC(hDrawDC);
??? ??? ??? ??? pBodyElem->Release();
??? ??? ??? }
??? ??? ??? pDoc->Release();
??? ??? }
??? ??? pDisp->Release();
??? }
??? g_eventComplete->SetEvent();
}

?

// 改變Font

HRESULT CPageCaptureView::ChangeFontSize(float nZoom)
{
??? CComQIPtr<IHTMLDocument2,&IID_IHTMLDocument2> pDoc2;
??? CComQIPtr<IHTMLElementCollection,&IID_IHTMLElementCollection>? pCollection;
??? //CComQIPtr<IHTMLDocument3,&IID_IHTMLDocument2> pDoc3;
??? CComQIPtr<IHTMLElement,&IID_IHTMLElement> pBody;
??? CComQIPtr<IHTMLElement2,&IID_IHTMLElement2> pBody2;
??? LPDISPATCH pDisp = NULL;
??? HRESULT? hr = S_OK;
??? pDisp = GetHtmlDocument();
??? if(!pDisp)
??? {
??? ??? return E_FAIL;
??? }
???
??? //??? hr = pDoc->QueryInterface(IID_IHTMLDocument3,(void**)&pDoc3);
??? hr = pDisp->QueryInterface(IID_IHTMLDocument2, (LPVOID*)&pDoc2);
???
??? if (hr || (!pDoc2))
??? {
??????? return E_FAIL;
??? }
??? hr = pDoc2->get_body(&pBody);//getElementsByTagName(L"SPAN",&pCollection);
??? if (hr || (!pBody))
??? {
??????? return E_FAIL;
??? }
??? pBody->QueryInterface(IID_IHTMLElement2,(void**)&pBody2);
??? if (hr || (!pBody2))
??? {
??????? return E_FAIL;
??? }
??? pBody2->getElementsByTagName(L"SPAN",&pCollection);;
??? if (hr || (!pCollection))
??? {
??????? return E_FAIL;
??? }
???
??? long len;
??? VARIANT varIndex;
??? VARIANT var2;
??? varIndex.vt=VT_I4;
??? VariantInit( &var2 );
??? pCollection->get_length(&len);
??? CComVariant var;
??? for(long i=0; i<len; i++)
??? {
??? ??? CComQIPtr<IHTMLStyle,&IID_IHTMLStyle> pStyle;
??? ??? varIndex.lVal=i;
??? ??? CComPtr<IDispatch> pDisp;
??? ??? pCollection->item(varIndex,var2, &pDisp);
??? ??? if (hr || (!pDisp))
??? ??? {
??? ??? ??? return E_FAIL;
??? ??? }
??? ??? CComQIPtr<IHTMLElement,&IID_IHTMLElement>? pElement(pDisp);
??? ???
??? ??? if ((!pElement))
??? ??? {
??? ??? ??? return E_FAIL;
??? ??? }
??? ??? hr = pElement->get_style(&pStyle);
??? ??? if (hr || (!pStyle))
??? ??? {
??? ??? ??? continue;
??? ??? }
??? ??? hr = pStyle->get_fontSize(&var);
??? ??? if(var.bstrVal != NULL && var.vt == VT_BSTR)
??? ??? {
??? ??? ??? CString strSize(var.bstrVal);
??? ??? ??? strSize.TrimLeft();
??? ??? ??? strSize.TrimRight();
??? ??? ??? if (strSize.Find("pt")!=-1)
??? ??? ??? {
??? ??? ??? ??? CString str =strSize.Left(strSize.GetLength()-2);
??? ??? ??? ??? int n = atoi(str);
??? ??? ??? ??? str.Format("%dpt",(int)(n*nZoom));
??? ??? ??? ??? var.bstrVal = str.AllocSysString();
??? ??? ??? ??? pStyle->put_fontSize(var);
??? ??? ??? }
??? ??? ???
??? ??? }
??? }
??? return hr;
}

總結

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