htmleditctrl2.cpp

能够所见即所得来编辑HTML 不需要具体写HTML

// WebBrowserEdit.cpp: implementation of the CWebBrowserEdit class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "HtmlEditCtrl2.h"
#include "AtlBase.H"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

/////////////////////////////////////////////////////////////////////////////
// CHtmlEditCtrl2

CHtmlEditCtrl2::CHtmlEditCtrl2()
{
	m_hResult = E_FAIL;
	m_pDispatch = NULL;
	m_pHtmlDoc = NULL;
	m_pCmdTarg = NULL;
}

CHtmlEditCtrl2::~CHtmlEditCtrl2()
{
	if(m_pDispatch)
	{
		m_pDispatch->Release();
	}
	
	if(m_pHtmlDoc)
	{
		m_pHtmlDoc->Release();
	}
	
	if(m_pCmdTarg)
	{
		m_pCmdTarg->Release();
	}
}

/*
IZ: Function to retive all tags that contains images (like <img src="http://www.server.com/image.jpg>") from HTML document
	Was not present in orginal CHtmlEditCtrlBase
*/
HRESULT CHtmlEditCtrl2::GetURLsOfAllImages(CStringArray& a_arrImages)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	IHTMLElementCollection* pImages;
	m_hResult = m_pHtmlDoc->get_images(&pImages);
	
	if( SUCCEEDED(m_hResult) && pImages )
	{
		long lNumberOfItems = 0;
		m_hResult = pImages->get_length(&lNumberOfItems);
		if( SUCCEEDED(m_hResult) )
		{	
			IDispatch *ppvDisp;
			IHTMLImgElement *ppvElement;
	
			for (long ix=0; ix<lNumberOfItems; ix++)
			{
				CComVariant index = ix;
				m_hResult = pImages->item( index, index, &ppvDisp );

				if( SUCCEEDED(m_hResult) && ppvDisp ) 
				{
					m_hResult = ppvDisp->QueryInterface( IID_IHTMLImgElement ,  (void **) &ppvElement);
					ppvDisp->Release();
					
					if ( SUCCEEDED(m_hResult) && ppvElement )
					{
						BSTR bstrText;
						CString sText;

						m_hResult = ppvElement->get_src(&bstrText);
						ppvElement->Release();

						BSTR2CString(bstrText, sText);
						::SysFreeString(bstrText);

						a_arrImages.Add( sText );
					}
				}
			}
		}

		pImages->Release();
	}

	return m_hResult;
}

/*
IZ: Was not present in orginal CHtmlEditCtrlBase
*/
HRESULT CHtmlEditCtrl2::ReplaceImageURL(const CString& a_sUrlToReplace, const CString& a_sUrlToReplaceWith)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IHTMLElementCollection* pImages;
	m_hResult = m_pHtmlDoc->get_images(&pImages);
	
	if( SUCCEEDED(m_hResult) && pImages)
	{
		long lNumberOfItems = 0;
		m_hResult = pImages->get_length(&lNumberOfItems);
		
		if( SUCCEEDED(m_hResult) )
		{	
			IDispatch *ppvDisp;
			IHTMLImgElement *ppvElement;
	
			for (long ix=0; ix<lNumberOfItems; ix++)
			{
				CComVariant index = ix;
				m_hResult = pImages->item( index, index, &ppvDisp );

				if( SUCCEEDED(m_hResult) && ppvDisp ) 
				{
					m_hResult = ppvDisp->QueryInterface( IID_IHTMLImgElement ,  (void **) &ppvElement);
					ppvDisp->Release();
					
					if ( SUCCEEDED(m_hResult) && ppvElement )
					{
						BSTR bstrText;
						CString sText;
						m_hResult = ppvElement->get_src(&bstrText);
						BSTR2CString(bstrText, sText);
						SysFreeString(bstrText);
						
						if(a_sUrlToReplace == sText)
						{
							bstrText = a_sUrlToReplaceWith.AllocSysString();
							m_hResult = ppvElement->put_src(bstrText);
							SysFreeString(bstrText);
						}

						ppvElement->Release();
					}
				}
			}
		}

		pImages->Release();
	}

	return m_hResult;
}


HRESULT CHtmlEditCtrl2::GetBodyColorParameters(CString& a_sColor, BOOL a_bTextColor)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	IHTMLElement* pElem;
	m_hResult = m_pHtmlDoc->get_body(&pElem);
	
	if( SUCCEEDED(m_hResult) && pElem )
	{
		IHTMLBodyElement* pBodyElem;
		m_hResult = pElem->QueryInterface( IID_IHTMLBodyElement, (void**)&pBodyElem );
		pElem->Release();
		
		if( SUCCEEDED(m_hResult) && pBodyElem )
		{
			CComVariant vaRet;

			if(a_bTextColor)
				m_hResult = pBodyElem->get_text( &vaRet );
			else
				m_hResult = pBodyElem->get_bgColor( &vaRet );

			pBodyElem->Release();

			if(vaRet.vt & VT_BSTR)
			{
				BSTR2CString(vaRet.bstrVal, a_sColor);
			}
			else if(vaRet.vt & VT_I4)
			{
				ASSERT(0);//IZ TO CHECK
				a_sColor.Format("%d", vaRet.lVal);
			}
			else
			{
				ASSERT(0);
			}
		}
	}

	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetBodyBackgroundColor(CString& a_sColor)
{
	return GetBodyColorParameters(a_sColor, FALSE);
}

HRESULT CHtmlEditCtrl2::GetBodyTextColor(CString& a_sColor)
{
	return GetBodyColorParameters(a_sColor, TRUE);
}

HRESULT CHtmlEditCtrl2::GetBodyBackgroundImage(CString& a_sImage)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	IHTMLElement* pElem;
	m_hResult = m_pHtmlDoc->get_body(&pElem);
	
	if( SUCCEEDED(m_hResult) && pElem )
	{
		IHTMLBodyElement* pBodyElem;
		m_hResult = pElem->QueryInterface( IID_IHTMLBodyElement, (void**)&pBodyElem );
		pElem->Release();
		
		if( SUCCEEDED(m_hResult) && pBodyElem )
		{
			BSTR bstrBody;
			m_hResult = pBodyElem->get_background( &bstrBody );
			pBodyElem->Release();

			BSTR2CString(bstrBody, a_sImage);
			SysFreeString(bstrBody);
		}
	}

	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetBodyProperties(CString& a_sTag)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	IHTMLElement* pElem;
	m_hResult = m_pHtmlDoc->get_body(&pElem);
	
	if( SUCCEEDED(m_hResult) && pElem )
	{
		IHTMLBodyElement* pBodyElem;
		m_hResult = pElem->QueryInterface( IID_IHTMLBodyElement, (void**)&pBodyElem );
		pElem->Release();
		
		if( SUCCEEDED(m_hResult) && pBodyElem )
		{
			BSTR bstrBody;
			m_hResult = pBodyElem->get_bgProperties( &bstrBody );
			pBodyElem->Release();
			
			BSTR2CString(bstrBody, a_sTag);
			SysFreeString(bstrBody);
		}
	}

	return m_hResult;
}

HRESULT CHtmlEditCtrl2::SetBodyBackgroundImage(const CString& a_sImage)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	IHTMLElement* pElem;
	m_hResult = m_pHtmlDoc->get_body(&pElem);
	
	if( SUCCEEDED(m_hResult) && pElem )
	{
		IHTMLBodyElement* pBodyElem;
		m_hResult = pElem->QueryInterface( IID_IHTMLBodyElement, (void**)&pBodyElem );
		pElem->Release();
		
		if( SUCCEEDED(m_hResult) && pBodyElem )
		{
			BSTR bstrBody = a_sImage.AllocSysString();
			m_hResult = pBodyElem->put_background( bstrBody );
			pBodyElem->Release();
			::SysFreeString(bstrBody);
		}
	}

	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetDocumentCharset(CString& a_sCharsetEncoding)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	BSTR bstrCharset;
	m_hResult = m_pHtmlDoc->get_charset(&bstrCharset);
	BSTR2CString(bstrCharset, a_sCharsetEncoding);
	SysFreeString(bstrCharset);

	return m_hResult;
}

HRESULT CHtmlEditCtrl2::SetDocumentCharset(const CString& a_sCharsetEncoding)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}

	BSTR bstrCharset = a_sCharsetEncoding.AllocSysString();
	m_hResult = m_pHtmlDoc->put_charset(bstrCharset);
	::SysFreeString(bstrCharset);

	return m_hResult;
}

BOOL CHtmlEditCtrl2::PrepareInterfaces()
{
	m_hResult  = E_FAIL;
	
	if(m_pDispatch == NULL)
	{
		m_pDispatch = CWebBrowser2::GetDocument();
		
		if(m_pDispatch)
		{
			m_hResult = m_pDispatch->QueryInterface(IID_IHTMLDocument2, (void**)&m_pHtmlDoc);
			m_hResult = m_pDispatch->QueryInterface(IID_IOleCommandTarget, (void**)&m_pCmdTarg);
		}
	}
	
	return m_pDispatch && m_pHtmlDoc && m_pCmdTarg;
}


BOOL CHtmlEditCtrl2::SetDesignMode(BOOL bMode)
{
	if( PrepareInterfaces() == FALSE)
	{
		return FALSE;
	}
	
	m_hResult = m_pHtmlDoc->put_designMode(bMode ? L"On" : L"Off");
	return SUCCEEDED( m_hResult );
}

BOOL CHtmlEditCtrl2::IsDesignMode()
{
	if(PrepareInterfaces() == FALSE)
	{
		return FALSE;
	}
	
	BSTR bstrDesignMode;
	m_pHtmlDoc->get_designMode( &bstrDesignMode );
	
	CString sMode;
	BSTR2CString(bstrDesignMode, sMode);
	SysFreeString(bstrDesignMode);
	
	return ( sMode == "On" );
}


HRESULT CHtmlEditCtrl2::ExecCommand(const GUID *pGuid, long cmdID, long cmdExecOpt, VARIANT* pInVar, VARIANT* pOutVar)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	return m_pCmdTarg->Exec(pGuid, cmdID, cmdExecOpt, pInVar , pOutVar);
}

HRESULT CHtmlEditCtrl2::ExecCommand(long cmdID, long cmdExecOpt, VARIANT* pInVar, VARIANT* pOutVar)
{
	return ExecCommand(&CGID_MSHTML, cmdID, cmdExecOpt, pInVar , pOutVar );
}

long CHtmlEditCtrl2::QueryStatus(long cmdID)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	OLECMD ocmd = {cmdID, 0};
	if (S_OK == m_pCmdTarg->QueryStatus(&CGID_MSHTML, 1, &ocmd, NULL))
		return ocmd.cmdf;
	
	return 0;
}

HRESULT CHtmlEditCtrl2::GetEvent(IHTMLEventObj **ppEventObj)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IHTMLWindow2* sphtmlWnd = NULL;
	
	if (!ppEventObj)
		return E_POINTER;
	
	*ppEventObj = NULL;
	HRESULT hr = E_FAIL;
	
	m_hResult = m_pHtmlDoc->get_parentWindow(&sphtmlWnd);
	if(m_hResult == S_OK)
	{
		m_hResult = sphtmlWnd->get_event(ppEventObj);
		sphtmlWnd->Release();
	}
	
	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetEventSrcElement(IHTMLElement **ppSrcElement)
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IHTMLEventObj* spEventObj = NULL;
	
	if (!ppSrcElement)
		return E_POINTER;
	
	*ppSrcElement = NULL;
	m_hResult = GetEvent(&spEventObj);
	if (m_hResult == S_OK)
	{
		m_hResult = spEventObj->get_srcElement(ppSrcElement);
		spEventObj->Release();
	}
	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetDocument(IHTMLDocument2** ppDoc)
{	
	if( PrepareInterfaces() == FALSE)
	{
		return E_NOINTERFACE;
	}
	
	*ppDoc = m_pHtmlDoc;
	m_pHtmlDoc->AddRef();
	return S_OK;
}

HRESULT CHtmlEditCtrl2::NewDocument()
{
	if( PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IPersistStreamInit* spPSI;
	m_hResult = m_pHtmlDoc->QueryInterface(IID_IPersistStreamInit, (void**)&spPSI);
	
	if( SUCCEEDED(m_hResult) && spPSI )
	{
		m_hResult = spPSI->InitNew();
		spPSI->Release();
	}
	
	return m_hResult;
}

/*
	//IZ WARNING - NOT UNICODE AWARE FUNCTION!
*/
HRESULT CHtmlEditCtrl2::GetDocumentBody(CString& a_sBody, BOOL a_bTextInsteadHTML)
{
	if(PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IHTMLElement* pElem;
	m_hResult = m_pHtmlDoc->get_body(&pElem);
	
	if( SUCCEEDED(m_hResult) && pElem )
	{
		BSTR bstrText;

		if(a_bTextInsteadHTML)
			m_hResult = pElem->get_innerText(&bstrText);
		else
			m_hResult = pElem->get_outerHTML(&bstrText);

		BSTR2CString(bstrText, a_sBody);
		SysFreeString(bstrText);

		pElem->Release();
	}

	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetDocumentHTML(CString& szHTML, BOOL a_bClearDirtyFlag)
{
	if(PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IPersistStreamInit* spPSI;
	CStreamOnCString stream;
	
	m_hResult = m_pHtmlDoc->QueryInterface(IID_IPersistStreamInit, (void**)&spPSI);
	
	if( SUCCEEDED(m_hResult) && spPSI )
	{
		m_hResult = spPSI->Save(static_cast<IStream*>(&stream), a_bClearDirtyFlag);
		if (m_hResult == S_OK)
		{
			if (!stream.CopyData(szHTML))
				m_hResult = E_OUTOFMEMORY;
		}
		
		spPSI->Release();
	}
	
	return m_hResult;
}

HRESULT CHtmlEditCtrl2::SetDocumentHTML(LPCTSTR szHTML)
{
	if(PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IPersistStreamInit* spPSI;
	CStreamOnCString stream(szHTML);
	
	if (m_pHtmlDoc)
	{
		m_hResult = m_pHtmlDoc->QueryInterface(IID_IPersistStreamInit, (void**)&spPSI);
		
		if( SUCCEEDED(m_hResult) && spPSI )
		{
			m_hResult = spPSI->Load(static_cast<IStream*>(&stream));
			spPSI->Release();
		}
	}
	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetIsDirty()
{
	if(PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	IPersistStreamInit* spPSI;
	
	if (m_pHtmlDoc)
	{
		m_hResult = m_pHtmlDoc->QueryInterface(IID_IPersistStreamInit, (void**)&spPSI);
		
		if( SUCCEEDED(m_hResult) && spPSI )
		{
			m_hResult = spPSI->IsDirty();
			spPSI->Release();
		}
	}
	return m_hResult;
}

HRESULT CHtmlEditCtrl2::GetDocumentTitle(CString& a_sTitle)
{
	if(PrepareInterfaces() == FALSE)
	{
		return E_FAIL;
	}
	
	BSTR bstrTitle;
	m_hResult = m_pHtmlDoc->get_title(&bstrTitle);