mirror of
https://github.com/godotengine/godot.git
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376 lines
11 KiB
C++
376 lines
11 KiB
C++
/**************************************************************************/
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/* drop_target_windows.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "drop_target_windows.h"
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#include "core/io/dir_access.h"
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#include "core/math/random_pcg.h"
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#include "core/os/time.h"
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#include <fileapi.h>
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// Helpers
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static String create_temp_dir() {
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Char16String buf;
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int bufsize = GetTempPathW(0, nullptr) + 1;
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buf.resize(bufsize);
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if (GetTempPathW(bufsize, (LPWSTR)buf.ptrw()) == 0) {
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return "";
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}
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String tmp_dir = String::utf16((const char16_t *)buf.ptr());
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RandomPCG gen(Time::get_singleton()->get_ticks_usec());
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const int attempts = 4;
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for (int i = 0; i < attempts; ++i) {
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uint32_t rnd = gen.rand();
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String dirname = "godot_tmp_" + String::num_uint64(rnd);
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String res_dir = tmp_dir.path_join(dirname);
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Char16String res_dir16 = res_dir.utf16();
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if (CreateDirectoryW((LPCWSTR)res_dir16.ptr(), nullptr)) {
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return res_dir;
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}
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}
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return "";
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}
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static bool remove_dir_recursive(const String &p_dir) {
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Ref<DirAccess> dir_access = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
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if (dir_access->change_dir(p_dir) != OK) {
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return false;
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}
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return dir_access->erase_contents_recursive() == OK;
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}
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static bool stream2file(IStream *p_stream, FILEDESCRIPTORW *p_desc, const String &p_path) {
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if (DirAccess::make_dir_recursive_absolute(p_path.get_base_dir()) != OK) {
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return false;
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}
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Char16String path16 = p_path.utf16();
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DWORD dwFlagsAndAttributes = FILE_ATTRIBUTE_NORMAL;
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if (p_desc->dwFlags & FD_ATTRIBUTES) {
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dwFlagsAndAttributes = p_desc->dwFileAttributes;
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}
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HANDLE file = CreateFileW(
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(LPCWSTR)path16.ptr(),
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GENERIC_WRITE,
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0,
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nullptr,
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CREATE_NEW,
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dwFlagsAndAttributes,
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nullptr);
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if (!file) {
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return false;
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}
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const int bufsize = 4096;
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char buf[bufsize];
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ULONG nread = 0;
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DWORD nwritten = 0;
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HRESULT read_result = S_OK;
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bool result = true;
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while (true) {
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read_result = p_stream->Read(buf, bufsize, &nread);
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if (read_result != S_OK && read_result != S_FALSE) {
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result = false;
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goto cleanup;
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}
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if (!nread) {
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break;
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}
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while (nread > 0) {
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if (!WriteFile(file, buf, nread, &nwritten, nullptr) || !nwritten) {
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result = false;
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goto cleanup;
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}
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nread -= nwritten;
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}
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}
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cleanup:
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CloseHandle(file);
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return result;
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}
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// DropTargetWindows
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bool DropTargetWindows::is_valid_filedescriptor() {
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return cf_filedescriptor != 0 && cf_filecontents != 0;
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}
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HRESULT DropTargetWindows::handle_hdrop_format(Vector<String> *p_files, IDataObject *pDataObj) {
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FORMATETC fmt = { CF_HDROP, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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STGMEDIUM stg;
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HRESULT res = S_OK;
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if (pDataObj->GetData(&fmt, &stg) != S_OK) {
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return E_UNEXPECTED;
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}
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HDROP hDropInfo = (HDROP)GlobalLock(stg.hGlobal);
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Char16String buf;
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if (hDropInfo == nullptr) {
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ReleaseStgMedium(&stg);
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return E_UNEXPECTED;
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}
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int fcount = DragQueryFileW(hDropInfo, 0xFFFFFFFF, nullptr, 0);
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for (int i = 0; i < fcount; i++) {
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int buffsize = DragQueryFileW(hDropInfo, i, nullptr, 0);
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buf.resize(buffsize + 1);
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if (DragQueryFileW(hDropInfo, i, (LPWSTR)buf.ptrw(), buffsize + 1) == 0) {
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res = E_UNEXPECTED;
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goto cleanup;
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}
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String file = String::utf16((const char16_t *)buf.ptr());
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p_files->push_back(file);
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}
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cleanup:
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GlobalUnlock(stg.hGlobal);
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ReleaseStgMedium(&stg);
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return res;
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}
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HRESULT DropTargetWindows::handle_filedescriptor_format(Vector<String> *p_files, IDataObject *pDataObj) {
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FORMATETC fmt = { cf_filedescriptor, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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STGMEDIUM stg;
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HRESULT res = S_OK;
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if (pDataObj->GetData(&fmt, &stg) != S_OK) {
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return E_UNEXPECTED;
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}
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FILEGROUPDESCRIPTORW *filegroup_desc = (FILEGROUPDESCRIPTORW *)GlobalLock(stg.hGlobal);
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if (!filegroup_desc) {
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ReleaseStgMedium(&stg);
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return E_UNEXPECTED;
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}
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tmp_path = create_temp_dir();
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Ref<DirAccess> dir_access = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
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PackedStringArray copied;
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if (dir_access->change_dir(tmp_path) != OK) {
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res = E_UNEXPECTED;
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goto cleanup;
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}
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for (int i = 0; i < (int)filegroup_desc->cItems; ++i) {
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res = save_as_file(tmp_path, filegroup_desc->fgd + i, pDataObj, i);
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if (res != S_OK) {
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res = E_UNEXPECTED;
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goto cleanup;
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}
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}
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copied = dir_access->get_files();
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for (const String &file : copied) {
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p_files->push_back(tmp_path.path_join(file));
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}
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copied = dir_access->get_directories();
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for (const String &dir : copied) {
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p_files->push_back(tmp_path.path_join(dir));
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}
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cleanup:
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GlobalUnlock(filegroup_desc);
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ReleaseStgMedium(&stg);
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if (res != S_OK) {
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remove_dir_recursive(tmp_path);
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tmp_path.clear();
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}
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return res;
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}
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HRESULT DropTargetWindows::save_as_file(const String &p_out_dir, FILEDESCRIPTORW *p_file_desc, IDataObject *pDataObj, int p_file_idx) {
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String relpath = String::utf16((const char16_t *)p_file_desc->cFileName);
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String fullpath = p_out_dir.path_join(relpath);
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if (p_file_desc->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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if (DirAccess::make_dir_recursive_absolute(fullpath) != OK) {
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return E_UNEXPECTED;
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}
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return S_OK;
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}
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FORMATETC fmt = { cf_filecontents, nullptr, DVASPECT_CONTENT, p_file_idx, TYMED_ISTREAM };
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STGMEDIUM stg;
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HRESULT res = S_OK;
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if (pDataObj->GetData(&fmt, &stg) != S_OK) {
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return E_UNEXPECTED;
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}
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IStream *stream = stg.pstm;
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if (stream == nullptr) {
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res = E_UNEXPECTED;
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goto cleanup;
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}
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if (!stream2file(stream, p_file_desc, fullpath)) {
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res = E_UNEXPECTED;
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goto cleanup;
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}
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cleanup:
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ReleaseStgMedium(&stg);
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return res;
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}
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DropTargetWindows::DropTargetWindows(DisplayServerWindows::WindowData *p_window_data) :
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ref_count(1), window_data(p_window_data) {
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cf_filedescriptor = RegisterClipboardFormat(CFSTR_FILEDESCRIPTORW);
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cf_filecontents = RegisterClipboardFormat(CFSTR_FILECONTENTS);
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}
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HRESULT STDMETHODCALLTYPE DropTargetWindows::QueryInterface(REFIID riid, void **ppvObject) {
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if (riid == IID_IUnknown || riid == IID_IDropTarget) {
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*ppvObject = static_cast<IDropTarget *>(this);
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AddRef();
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return S_OK;
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}
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*ppvObject = nullptr;
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return E_NOINTERFACE;
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}
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ULONG STDMETHODCALLTYPE DropTargetWindows::AddRef() {
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return InterlockedIncrement(&ref_count);
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}
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ULONG STDMETHODCALLTYPE DropTargetWindows::Release() {
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ULONG count = InterlockedDecrement(&ref_count);
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if (count == 0) {
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memfree(this);
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}
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return count;
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}
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HRESULT STDMETHODCALLTYPE DropTargetWindows::DragEnter(IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
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(void)grfKeyState;
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(void)pt;
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FORMATETC hdrop_fmt = { CF_HDROP, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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FORMATETC filedesc_fmt = { cf_filedescriptor, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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if (!window_data->drop_files_callback.is_valid()) {
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*pdwEffect = DROPEFFECT_NONE;
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} else if (pDataObj->QueryGetData(&hdrop_fmt) == S_OK) {
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*pdwEffect = DROPEFFECT_COPY;
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} else if (is_valid_filedescriptor() && pDataObj->QueryGetData(&filedesc_fmt) == S_OK) {
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*pdwEffect = DROPEFFECT_COPY;
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} else {
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*pdwEffect = DROPEFFECT_NONE;
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}
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE DropTargetWindows::DragOver(DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
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(void)grfKeyState;
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(void)pt;
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*pdwEffect = DROPEFFECT_COPY;
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE DropTargetWindows::DragLeave() {
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE DropTargetWindows::Drop(IDataObject *pDataObj, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect) {
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(void)grfKeyState;
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(void)pt;
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*pdwEffect = DROPEFFECT_NONE;
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if (!window_data->drop_files_callback.is_valid()) {
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return S_OK;
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}
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FORMATETC hdrop_fmt = { CF_HDROP, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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FORMATETC filedesc_fmt = { cf_filedescriptor, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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Vector<String> files;
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if (pDataObj->QueryGetData(&hdrop_fmt) == S_OK) {
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HRESULT res = handle_hdrop_format(&files, pDataObj);
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if (res != S_OK) {
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return res;
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}
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} else if (pDataObj->QueryGetData(&filedesc_fmt) == S_OK && is_valid_filedescriptor()) {
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HRESULT res = handle_filedescriptor_format(&files, pDataObj);
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if (res != S_OK) {
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return res;
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}
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} else {
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return E_UNEXPECTED;
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}
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if (!files.size()) {
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return S_OK;
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}
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Variant v_files = files;
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const Variant *v_args[1] = { &v_files };
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Variant ret;
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Callable::CallError ce;
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window_data->drop_files_callback.callp((const Variant **)&v_args, 1, ret, ce);
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if (!tmp_path.is_empty()) {
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remove_dir_recursive(tmp_path);
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tmp_path.clear();
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}
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if (ce.error != Callable::CallError::CALL_OK) {
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ERR_PRINT(vformat("Failed to execute drop files callback: %s.", Variant::get_callable_error_text(window_data->drop_files_callback, v_args, 1, ce)));
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return E_UNEXPECTED;
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}
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*pdwEffect = DROPEFFECT_COPY;
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return S_OK;
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}
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