windows-server-2003/base/win32/clickonce/shell/shortcut/infotip.cpp

/*
 * infotip.cpp - IQueryInfo implementation
 */


/* Headers
 **********/

#include "project.hpp"
#include <stdio.h>    // for _snwprintf
#include "shellres.h"

const UINT s_ucMaxNameLen         = 20;
const UINT s_ucMaxTypeLen           = 10;
const UINT s_ucMaxLocationLen     = 15;
const UINT s_ucMaxCodebaseLen   = 15;

// see GetInfoTip() for how the tip string/string-length is assembled
const UINT s_ucMaxTipLen        = s_ucMaxNameLen+s_ucMaxTypeLen+s_ucMaxLocationLen \
                            +s_ucMaxCodebaseLen+DISPLAYNAMESTRINGLENGTH \
                            +TYPESTRINGLENGTH+MAX_PATH+MAX_URL_LENGTH+8;

extern HINSTANCE g_DllInstance;

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

HRESULT STDMETHODCALLTYPE CFusionShortcut::GetInfoFlags(DWORD *pdwFlags)
{
    if (pdwFlags)
        *pdwFlags = 0;

    return S_OK; //E_NOTIMPL?
}

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

// BUGBUG?: maybe replace the use of g_cwzEmptyString with L"(unknown)"?
HRESULT STDMETHODCALLTYPE CFusionShortcut::GetInfoTip(DWORD dwFlags, LPWSTR *ppwszTip)
{
    HRESULT hr = S_OK;
    LPMALLOC lpMalloc = NULL;

    WCHAR wzTip[s_ucMaxTipLen];
    WCHAR wzNameHint[s_ucMaxNameLen];
    WCHAR wzTypeHint[s_ucMaxTypeLen];
    WCHAR wzLocationHint[s_ucMaxLocationLen];
    WCHAR wzCodebaseHint[s_ucMaxCodebaseLen];

    LPWSTR pwzName = (m_pwzDesc ? m_pwzDesc : (LPWSTR) g_cwzEmptyString);
    LPWSTR pwzLocation = (m_pwzPath ? m_pwzPath : (LPWSTR) g_cwzEmptyString);
    LPWSTR pwzCodebase = (m_pwzCodebase ? m_pwzCodebase : (LPWSTR) g_cwzEmptyString);
    LPWSTR pwzAppType = NULL;

    LPASSEMBLY_IDENTITY pId = NULL;

    // dwFlags ignored

    if (ppwszTip)
        *ppwszTip = NULL;
    else
    {
        hr = E_INVALIDARG;
        goto exit;
    }

    // Allocate a shell memory object.
    hr = SHGetMalloc (&lpMalloc);
    if (FAILED (hr))
        goto exit;

    wzTip[0] = L'\0';

    // load resources
    if (!LoadString(g_DllInstance, IDS_TIP_NAME, wzNameHint, s_ucMaxNameLen))
    {
        // do not fail
        wzNameHint[0] = L'\0';
    }

    if (!LoadString(g_DllInstance, IDS_TIP_TYPE, wzTypeHint, s_ucMaxTypeLen))
    {
        // do not fail
        wzTypeHint[0] = L'\0';
    }

    if (!LoadString(g_DllInstance, IDS_TIP_LOCATION, wzLocationHint, s_ucMaxLocationLen))
    {
        // do not fail
        wzLocationHint[0] = L'\0';
    }

    if (!LoadString(g_DllInstance, IDS_TIP_CODEBASE, wzCodebaseHint, s_ucMaxCodebaseLen))
    {
        // do not fail
        wzCodebaseHint[0] = L'\0';
    }

    if (SUCCEEDED(hr = GetAssemblyIdentity(&pId)))
    {
        DWORD ccString = 0;

        if (FAILED(pId->GetAttribute(SXS_ASSEMBLY_IDENTITY_STD_ATTRIBUTE_NAME_TYPE, &pwzAppType, &ccString)))
            pwzAppType = NULL;

        pId->Release();
        pId = NULL;
    }

    // ignore error
    // BUGBUG?: "(null)" is displayed if m_pwzDesc or m_pwzPath == NULL...
    if (_snwprintf(wzTip, s_ucMaxTipLen, L"%s %s\n%s %s\n%s %s\n%s %s",
            wzNameHint, pwzName, wzTypeHint, (pwzAppType ? pwzAppType : g_cwzEmptyString),
            wzLocationHint, pwzLocation, wzCodebaseHint, pwzCodebase) < 0)
        wzTip[s_ucMaxTipLen-1] = L'\0';

    // Get some memory
    *ppwszTip = (LPWSTR) lpMalloc->Alloc ((wcslen(wzTip)+1)*sizeof(WCHAR));
    if (! *ppwszTip)
    {
        hr = E_OUTOFMEMORY;
        goto exit; // Error - could not allocate memory
    }

    wcscpy(*ppwszTip, wzTip);

exit:
    if (pwzAppType)
        delete [] pwzAppType;

    if (lpMalloc)
        lpMalloc->Release();

    return hr;
}