133 lines
3.2 KiB
C++
133 lines
3.2 KiB
C++
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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#include "StdAfx.h"
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#include "Picture.h"
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#include "XmlDocument.h"
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CPicture::CPicture(CONTENT_ID id, LPWSTR pwszFile)
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{
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m_contentID = id;
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m_prevId = id - 1;
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m_nextId = id + 1;
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//
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// Copy the filename locally for the alternate text
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//
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if (NULL != pwszFile)
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{
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size_t length = wcslen(pwszFile) + 1;
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m_pwszFile = new WCHAR[length];
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if (NULL != m_pwszFile)
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{
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StringCchCopyW(m_pwszFile, length, pwszFile);
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}
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}
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}
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CPicture::CPicture()
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{
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m_contentID = CONTENT_ID_GLANCE;
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m_prevId = 0;
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m_nextId = 0;
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m_pwszFile = NULL;
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}
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CPicture::~CPicture()
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{
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if (NULL != m_pwszFile)
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{
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delete [] m_pwszFile;
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m_pwszFile = NULL;
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}
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}
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void CPicture::LoadContent(DWORD* pdwSize, BYTE** ppbData, ISideShowCapabilities * /*pICapabilities*/)
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{
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if (NULL == pdwSize ||
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NULL == ppbData)
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{
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return;
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}
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//
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// Return size for the string, including the terminating NULL
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//
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LPSTR pszContent = GetContentXML();
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*ppbData = (BYTE*)pszContent;
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*pdwSize = (DWORD)strlen(pszContent) + 1;
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}
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void CPicture::FreeContent(BYTE** ppbData)
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{
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//
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// Free the memory allocated in LoadContent
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//
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if (NULL != ppbData)
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{
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::CoTaskMemFree(*ppbData);
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}
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}
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LPSTR CPicture::GetContentXML()
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{
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LPSTR pszXML = NULL;
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CXmlDocument xmlDoc;
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CXmlElement* pBody = xmlDoc.AddElement(L"body");
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CXmlElement* pContent = pBody->AddElement(L"content");
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pContent->AddAttribute(L"id", m_contentID);
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pContent->AddAttribute(L"title", m_pwszFile);
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CXmlElement* pImage = pContent->AddElement(L"img");
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pImage->AddAttribute(L"align", L"c");
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pImage->AddAttribute(L"fit", L"screen");
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pImage->AddAttribute(L"alt", m_pwszFile);
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//
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// The Image ID is the CONTENT_ID of the raw image bytes;
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// that is the same as this content ID, offset by
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// (CID_RAWIMAGE_FIRST - CID_XMLIMAGE_FIRST)
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//
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pImage->AddAttribute(L"id", m_contentID + (CID_RAWIMAGE_FIRST - CID_XMLIMAGE_FIRST));
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CXmlElement* pLeftBtn = pContent->AddElement(L"btn");
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pLeftBtn->AddAttribute(L"key", L"left");
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pLeftBtn->AddAttribute(L"target", m_prevId);
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CXmlElement* pRightBtn = pContent->AddElement(L"btn");
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pRightBtn->AddAttribute(L"key", L"right");
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pRightBtn->AddAttribute(L"target", m_nextId);
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BSTR bstrXml;
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xmlDoc.GetXml(&bstrXml);
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//
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// The device handles UTF8 encoded strings, so the XML
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// needs to be converted from unicode to UTF8.
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//
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pszXML = AllocTaskUtf8String(bstrXml);
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::SysFreeString(bstrXml);
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delete pBody;
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delete pContent;
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delete pImage;
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delete pLeftBtn;
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delete pRightBtn;
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return pszXML;
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}
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void CPicture::SetNextID(CONTENT_ID id)
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{
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m_nextId = id;
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}
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void CPicture::SetPrevID(CONTENT_ID id)
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{
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m_prevId = id;
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} |