diff options
Diffstat (limited to 'shell/source/win32/shlxthandler/thumbviewer')
| -rw-r--r-- | shell/source/win32/shlxthandler/thumbviewer/thumbviewer.cxx | 500 |
1 files changed, 500 insertions, 0 deletions
diff --git a/shell/source/win32/shlxthandler/thumbviewer/thumbviewer.cxx b/shell/source/win32/shlxthandler/thumbviewer/thumbviewer.cxx new file mode 100644 index 000000000..7cc013b87 --- /dev/null +++ b/shell/source/win32/shlxthandler/thumbviewer/thumbviewer.cxx @@ -0,0 +1,500 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef DONT_HAVE_GDIPLUS + + +#include <global.hxx> + +#include <thumbviewer.hxx> +#include <shlxthdl.hxx> +#include <registry.hxx> +#include <fileextensions.hxx> +#include <config.hxx> +#include <zipfile.hxx> +#include <utilities.hxx> + +#include <resource.h> + +#include <stdio.h> +#include <utility> +#include <stdlib.h> + +#include <shellapi.h> + +#include <memory> + +namespace internal +{ + /* The signet.png used for thumbnails of signed documents + is contained as resource in this module, the resource + id is 2000 */ + static void LoadSignetImageFromResource(ZipFile::ZipContentBuffer_t& buffer) + { + HRSRC hrc = FindResourceW(g_hModule, L"#2000", reinterpret_cast<LPWSTR>(RT_RCDATA)); + DWORD size = SizeofResource(g_hModule, hrc); + HGLOBAL hglob = LoadResource(g_hModule, hrc); + char* data = static_cast<char*>(LockResource(hglob)); + buffer = ZipFile::ZipContentBuffer_t(data, data + size); + } + + static bool IsSignedDocument(const ZipFile* zipfile) + { + return zipfile->HasContent("META-INF/documentsignatures.xml"); + } + + static Gdiplus::Point CalcSignetPosition( + const Gdiplus::Rect& canvas, const Gdiplus::Rect& thumbnail_border, const Gdiplus::Rect& signet) + { + int x = 0; + int y = 0; + int hoffset = canvas.GetRight() - thumbnail_border.GetRight(); + int voffset = canvas.GetBottom() - thumbnail_border.GetBottom(); + + if (hoffset > voffset) + { + x = thumbnail_border.GetRight() - signet.GetRight() + min(signet.GetRight() / 2, hoffset); + y = thumbnail_border.GetBottom() - signet.GetBottom(); + } + else + { + x = thumbnail_border.GetRight() - signet.GetRight(); + y = thumbnail_border.GetBottom() - signet.GetBottom() + min(signet.GetBottom() / 2, voffset); + } + + return Gdiplus::Point(x,y); + } +} + +namespace { + +Gdiplus::Rect CalcScaledAspectRatio(const Gdiplus::Rect& src, const Gdiplus::Rect& dest) +{ + Gdiplus::Rect result; + if (src.Width >= src.Height) + result = Gdiplus::Rect(0, 0, dest.Width, src.Height * dest.Width / src.Width); + else + result = Gdiplus::Rect(0, 0, src.Width * dest.Height / src.Height, dest.Height); + + return result; +} + +class StreamOnZipBuffer final : public IStream +{ +public: + explicit StreamOnZipBuffer(const ZipFile::ZipContentBuffer_t& zip_buffer); + + // IUnknown + virtual ULONG STDMETHODCALLTYPE AddRef() override; + virtual ULONG STDMETHODCALLTYPE Release() override; + virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject) override; + + // IStream + virtual HRESULT STDMETHODCALLTYPE Read(void *pv, ULONG cb, ULONG *pcbRead) override; + virtual HRESULT STDMETHODCALLTYPE Write(void const *pv, ULONG cb, ULONG *pcbWritten) override; + virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition) override; + virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER libNewSize) override; + virtual HRESULT STDMETHODCALLTYPE CopyTo(IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten) override; + virtual HRESULT STDMETHODCALLTYPE Commit(DWORD grfCommitFlags) override; + virtual HRESULT STDMETHODCALLTYPE Revert() override; + virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) override; + virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) override; + virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG *pstatstg, DWORD grfStatFlag) override; + virtual HRESULT STDMETHODCALLTYPE Clone(IStream **ppstm) override; + +private: + LONG ref_count_; + const ZipFile::ZipContentBuffer_t& ref_zip_buffer_; + size_t pos_; +}; + +} + +StreamOnZipBuffer::StreamOnZipBuffer(const ZipFile::ZipContentBuffer_t& zip_buffer) : + ref_count_(1), + ref_zip_buffer_(zip_buffer), + pos_(0) +{ +} + +// IUnknown methods + +ULONG STDMETHODCALLTYPE StreamOnZipBuffer::AddRef() +{ + return InterlockedIncrement(&ref_count_); +} + +ULONG STDMETHODCALLTYPE StreamOnZipBuffer::Release() +{ + long refcnt = InterlockedDecrement(&ref_count_); + + if (0 == ref_count_) + delete this; + + return refcnt; +} + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject) +{ + *ppvObject = nullptr; + IUnknown* pUnk = nullptr; + + if ((IID_IUnknown == riid) || (IID_IStream == riid)) + { + pUnk = static_cast<IStream*>(this); + pUnk->AddRef(); + *ppvObject = pUnk; + return S_OK; + } + return E_NOINTERFACE; +} + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Read(void *pv, ULONG cb, ULONG *pcbRead) +{ + if (pv == nullptr) + return STG_E_INVALIDPOINTER; + + size_t size = ref_zip_buffer_.size(); + + if (pos_ > size) + return S_FALSE; + + char* p = static_cast<char*>(pv); + ULONG read = 0; + + for ( ;(pos_ < size) && (cb > 0); pos_++, cb--, read++) + *p++ = ref_zip_buffer_[pos_]; + + if (pcbRead) + *pcbRead = read; + + return S_OK; +} + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *) +{ + __int64 size = static_cast<__int64>(ref_zip_buffer_.size()); + __int64 p = 0; + + switch (dwOrigin) + { + case STREAM_SEEK_SET: + break; + case STREAM_SEEK_CUR: + p = static_cast<__int64>(pos_); + break; + case STREAM_SEEK_END: + p = size - 1; + break; + } + + HRESULT hr = STG_E_INVALIDFUNCTION; + + p += dlibMove.QuadPart; + + if ( ( p >= 0 ) && (p < size) ) + { + pos_ = static_cast<size_t>(p); + hr = S_OK; + } + return hr; +} + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Stat(STATSTG *pstatstg, DWORD grfStatFlag) +{ + if (pstatstg == nullptr) + return STG_E_INVALIDPOINTER; + + ZeroMemory(pstatstg, sizeof(STATSTG)); + + if (grfStatFlag == STATFLAG_DEFAULT) + { + size_t sz = 4 * sizeof(wchar_t); + wchar_t* name = static_cast<wchar_t*>(CoTaskMemAlloc(sz)); + ZeroMemory(name, sz); + memcpy(name, L"png", 3 * sizeof(wchar_t)); + pstatstg->pwcsName = name; + } + + pstatstg->type = STGTY_LOCKBYTES; + + ULARGE_INTEGER uli; + uli.LowPart = static_cast<DWORD>(ref_zip_buffer_.size()); + uli.HighPart = 0; + + pstatstg->cbSize = uli; + + return S_OK; +} + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Write(void const *, ULONG, ULONG *) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::SetSize(ULARGE_INTEGER) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::CopyTo(IStream *, ULARGE_INTEGER, ULARGE_INTEGER *, ULARGE_INTEGER *) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Commit(DWORD) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Revert() +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::LockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::UnlockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Clone(IStream **) +{ return E_NOTIMPL; } + + +CThumbviewer::CThumbviewer(long RefCnt) : + ref_count_(RefCnt) +{ + InterlockedIncrement(&g_DllRefCnt); + + thumbnail_size_.cx = 0; + thumbnail_size_.cy = 0; + + Gdiplus::GdiplusStartupInput gdiplusStartupInput; + Gdiplus::GdiplusStartup(&gdiplus_token_, &gdiplusStartupInput, nullptr); + + ZipFile::ZipContentBuffer_t img_data; + internal::LoadSignetImageFromResource(img_data); + IStream* stream = new StreamOnZipBuffer(img_data); + signet_ = new Gdiplus::Bitmap(stream, TRUE); + stream->Release(); +} + +CThumbviewer::~CThumbviewer() +{ + delete signet_; + Gdiplus::GdiplusShutdown(gdiplus_token_); + InterlockedDecrement(&g_DllRefCnt); +} + +// IUnknown methods + +HRESULT STDMETHODCALLTYPE CThumbviewer::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject) +{ + *ppvObject = nullptr; + IUnknown* pUnk = nullptr; + + if ((IID_IUnknown == riid) || (IID_IPersistFile == riid)) + { + pUnk = static_cast<IPersistFile*>(this); + pUnk->AddRef(); + *ppvObject = pUnk; + return S_OK; + } + else if (IID_IExtractImage == riid) + { + pUnk = static_cast<IExtractImage*>(this); + pUnk->AddRef(); + *ppvObject = pUnk; + return S_OK; + } + return E_NOINTERFACE; +} + +ULONG STDMETHODCALLTYPE CThumbviewer::AddRef() +{ + return InterlockedIncrement(&ref_count_); +} + +ULONG STDMETHODCALLTYPE CThumbviewer::Release() +{ + long refcnt = InterlockedDecrement(&ref_count_); + + if (0 == ref_count_) + delete this; + + return refcnt; +} + +// IExtractImage2 methods + +const std::string THUMBNAIL_CONTENT = "Thumbnails/thumbnail.png"; + +HRESULT STDMETHODCALLTYPE CThumbviewer::Extract(HBITMAP *phBmpImage) +{ + HRESULT hr = E_FAIL; + + try + { + std::wstring fname = getShortPathName( filename_ ); + std::unique_ptr<ZipFile> zipfile( new ZipFile( fname ) ); + + if (zipfile->HasContent(THUMBNAIL_CONTENT)) + { + ZipFile::ZipContentBuffer_t thumbnail; + zipfile->GetUncompressedContent(THUMBNAIL_CONTENT, thumbnail); + IStream* stream = new StreamOnZipBuffer(thumbnail); + + Gdiplus::Bitmap thumbnail_png(stream, TRUE); + + if ((thumbnail_png.GetHeight() == 0) || (thumbnail_png.GetWidth() == 0)) + { + stream->Release(); + return E_FAIL; + } + + HWND hwnd = GetDesktopWindow(); + HDC hdc = GetDC(hwnd); + HDC memDC = CreateCompatibleDC(hdc); + + if (memDC) + { + UINT offset = 3; // reserve a little border space + + Gdiplus::Rect canvas(0, 0, thumbnail_size_.cx, thumbnail_size_.cy); + Gdiplus::Rect canvas_thumbnail(offset, offset, thumbnail_size_.cx - 2 * offset, thumbnail_size_.cy - 2 * offset); + + Gdiplus::Rect scaledRect = CalcScaledAspectRatio( + Gdiplus::Rect(0, 0, thumbnail_png.GetWidth(), thumbnail_png.GetHeight()), canvas_thumbnail); + + struct { + BITMAPINFOHEADER bi; + DWORD ct[256]; + } dib; + + ZeroMemory(&dib, sizeof(dib)); + + dib.bi.biSize = sizeof(BITMAPINFOHEADER); + dib.bi.biWidth = thumbnail_size_.cx; + dib.bi.biHeight = thumbnail_size_.cy; + dib.bi.biPlanes = 1; + dib.bi.biBitCount = static_cast<WORD>(color_depth_); + dib.bi.biCompression = BI_RGB; + + LPVOID lpBits; + HBITMAP hMemBmp = CreateDIBSection(memDC, reinterpret_cast<LPBITMAPINFO>(&dib), DIB_RGB_COLORS, &lpBits, nullptr, 0); + HGDIOBJ hOldObj = SelectObject(memDC, hMemBmp); + + Gdiplus::Graphics graphics(memDC); + Gdiplus::Pen blackPen(Gdiplus::Color(255, 0, 0, 0), 1); + + Gdiplus::SolidBrush whiteBrush(Gdiplus::Color(255, 255, 255, 255)); + graphics.FillRectangle(&whiteBrush, canvas); + + scaledRect.X = (canvas.Width - scaledRect.Width) / 2; + scaledRect.Y = (canvas.Height - scaledRect.Height) / 2; + + Gdiplus::Rect border_rect(scaledRect.X, scaledRect.Y, scaledRect.Width, scaledRect.Height); + graphics.DrawRectangle(&blackPen, border_rect); + + scaledRect.X += 1; + scaledRect.Y += 1; + scaledRect.Width -= 1; + scaledRect.Height -= 1; + + graphics.SetInterpolationMode(Gdiplus::InterpolationModeHighQualityBicubic); + Gdiplus::Status stat = graphics.DrawImage( + &thumbnail_png, scaledRect, 0 , 0, + thumbnail_png.GetWidth(), thumbnail_png.GetHeight(), Gdiplus::UnitPixel); + + /* Add a signet sign to the thumbnail of signed documents */ + if (internal::IsSignedDocument(zipfile.get())) + { + double SCALING_FACTOR = 0.6; + Gdiplus::Rect signet_scaled( + 0, 0, static_cast<INT>(signet_->GetWidth() * SCALING_FACTOR), static_cast<INT>(signet_->GetHeight() * SCALING_FACTOR)); + Gdiplus::Point pos_signet = internal::CalcSignetPosition(canvas_thumbnail, border_rect, signet_scaled); + Gdiplus::Rect dest(pos_signet.X, pos_signet.Y, signet_scaled.GetRight(), signet_scaled.GetBottom()); + + stat = graphics.DrawImage( + signet_, dest, + 0, 0, signet_->GetWidth(), signet_->GetHeight(), + Gdiplus::UnitPixel); + } + + if (stat == Gdiplus::Ok) + { + *phBmpImage = hMemBmp; + hr = NOERROR; + } + + SelectObject(memDC, hOldObj); + DeleteDC(memDC); + } + + ReleaseDC(hwnd, hdc); + stream->Release(); + } + } + catch(std::exception&) + { + OutputDebugStringFormatW( L"CThumbviewer Extract ERROR!\n" ); + hr = E_FAIL; + } + return hr; +} + +HRESULT STDMETHODCALLTYPE CThumbviewer::GetLocation( + LPWSTR pszPathBuffer, DWORD cchMax, DWORD *pdwPriority, const SIZE *prgSize, DWORD dwRecClrDepth, DWORD *pdwFlags) +{ + if ((prgSize == nullptr) || (pdwFlags == nullptr) || ((*pdwFlags & IEIFLAG_ASYNC) && (pdwPriority == nullptr))) + return E_INVALIDARG; + + thumbnail_size_ = *prgSize; + color_depth_ = dwRecClrDepth; + + *pdwFlags = IEIFLAG_CACHE; // we don't cache the image + + wcsncpy(pszPathBuffer, filename_.c_str(), cchMax); + + return NOERROR; +} + +// IPersist methods + +HRESULT STDMETHODCALLTYPE CThumbviewer::GetClassID(CLSID* pClassID) +{ + pClassID = const_cast<CLSID*>(&CLSID_THUMBVIEWER_HANDLER); + return S_OK; +} + +// IPersistFile methods + +HRESULT STDMETHODCALLTYPE CThumbviewer::Load(LPCOLESTR pszFileName, DWORD) +{ + filename_ = pszFileName; + return S_OK; +} + +HRESULT STDMETHODCALLTYPE CThumbviewer::IsDirty() +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE CThumbviewer::Save(LPCOLESTR, BOOL) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE CThumbviewer::SaveCompleted(LPCOLESTR) +{ return E_NOTIMPL; } + +HRESULT STDMETHODCALLTYPE CThumbviewer::GetCurFile(LPOLESTR __RPC_FAR*) +{ return E_NOTIMPL; } + + +#endif // DONT_HAVE_GDIPLUS + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |