mirror of
https://github.com/JFormDesigner/FlatLaf.git
synced 2025-12-06 14:00:55 +03:00
273 lines
8.5 KiB
C++
273 lines
8.5 KiB
C++
/*
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* Copyright 2024 FormDev Software GmbH
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// avoid inlining of printf()
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#define _NO_CRT_STDIO_INLINE
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#include <windows.h>
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#include <shobjidl.h>
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#include "com_formdev_flatlaf_ui_FlatNativeWindowsLibrary.h"
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/**
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* @author Karl Tauber
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* @since 3.6
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*/
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// see FlatWndProc.cpp
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HWND getWindowHandle( JNIEnv* env, jobject window );
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//---- class AutoReleasePtr ---------------------------------------------------
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template<class T> class AutoReleasePtr {
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T* ptr;
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public:
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AutoReleasePtr() {
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ptr = NULL;
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}
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~AutoReleasePtr() {
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if( ptr != NULL )
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ptr->Release();
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}
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T** operator&() { return &ptr; }
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T* operator->() { return ptr; }
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operator T*() { return ptr; }
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};
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//---- class AutoReleaseString ------------------------------------------------
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class AutoReleaseString {
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JNIEnv* env;
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jstring javaString;
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const jchar* chars;
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public:
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AutoReleaseString( JNIEnv* _env, jstring _javaString ) {
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env = _env;
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javaString = _javaString;
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chars = (javaString != NULL) ? env->GetStringChars( javaString, NULL ) : NULL;
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}
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~AutoReleaseString() {
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if( chars != NULL )
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env->ReleaseStringChars( javaString, chars );
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}
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operator LPCWSTR() { return (LPCWSTR) chars; }
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};
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//---- class AutoReleaseIShellItem --------------------------------------------
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class AutoReleaseIShellItem : public AutoReleasePtr<IShellItem> {
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public:
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AutoReleaseIShellItem( JNIEnv* env, jstring path ) {
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AutoReleaseString cpath( env, path );
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::SHCreateItemFromParsingName( cpath, NULL, IID_IShellItem, reinterpret_cast<void**>( &*this ) );
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}
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};
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//---- class FilterSpec -------------------------------------------------------
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class FilterSpec {
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JNIEnv* env = NULL;
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jstring* jnames = NULL;
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jstring* jspecs = NULL;
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public:
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UINT count = 0;
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COMDLG_FILTERSPEC* specs = NULL;
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public:
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FilterSpec( JNIEnv* _env, jobjectArray fileTypes ) {
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if( fileTypes == NULL )
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return;
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env = _env;
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count = env->GetArrayLength( fileTypes ) / 2;
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if( count <= 0 )
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return;
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specs = new COMDLG_FILTERSPEC[count];
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jnames = new jstring[count];
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jspecs = new jstring[count];
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for( int i = 0; i < count; i++ ) {
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jnames[i] = (jstring) env->GetObjectArrayElement( fileTypes, i * 2 );
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jspecs[i] = (jstring) env->GetObjectArrayElement( fileTypes, (i * 2) + 1 );
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specs[i].pszName = (LPCWSTR) env->GetStringChars( jnames[i] , NULL );
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specs[i].pszSpec = (LPCWSTR) env->GetStringChars( jspecs[i], NULL );
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}
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}
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~FilterSpec() {
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if( specs == NULL )
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return;
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for( int i = 0; i < count; i++ ) {
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env->ReleaseStringChars( jnames[i], (jchar *) specs[i].pszName );
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env->ReleaseStringChars( jspecs[i], (jchar *) specs[i].pszSpec );
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env->DeleteLocalRef( jnames[i] );
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env->DeleteLocalRef( jspecs[i] );
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}
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delete[] jnames;
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delete[] jspecs;
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delete[] specs;
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}
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};
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//---- class CoInitializer ----------------------------------------------------
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class CoInitializer {
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public:
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bool initialized;
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CoInitializer() {
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HRESULT result = ::CoInitializeEx( NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE );
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initialized = SUCCEEDED( result );
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}
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~CoInitializer() {
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if( initialized )
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::CoUninitialize();
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}
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};
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//---- helper -----------------------------------------------------------------
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#define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_ ## option) != 0)
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#define CHECK_HRESULT( code ) { if( (code) != S_OK ) return NULL; }
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jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
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jclass stringClass = env->FindClass( "java/lang/String" );
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return env->NewObjectArray( count, stringClass, NULL );
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}
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jstring newJavaString( JNIEnv* env, LPWSTR str ) {
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return env->NewString( reinterpret_cast<jchar*>( str ), static_cast<jsize>( wcslen( str ) ) );
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}
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//---- JNI methods ------------------------------------------------------------
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extern "C"
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JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showFileChooser
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( JNIEnv* env, jclass cls, jobject owner, jboolean open,
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jstring title, jstring okButtonLabel, jstring fileNameLabel, jstring fileName,
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jstring folder, jstring saveAsItem, jstring defaultFolder, jstring defaultExtension,
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jint optionsSet, jint optionsClear, jint fileTypeIndex, jobjectArray fileTypes )
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{
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// initialize COM library
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CoInitializer coInitializer;
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if( !coInitializer.initialized )
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return NULL;
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// handle limitations (without this, some Win32 method fails and this method returns NULL)
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if( isOptionSet( FOS_PICKFOLDERS ) ) {
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open = true; // always use IFileOpenDialog for picking folders
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fileTypes = NULL; // no filter allowed for picking folders
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}
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if( !open && isOptionSet( FOS_ALLOWMULTISELECT ) )
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optionsSet &= ~FOS_ALLOWMULTISELECT;
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// convert Java strings to C strings
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AutoReleaseString ctitle( env, title );
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AutoReleaseString cokButtonLabel( env, okButtonLabel );
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AutoReleaseString cfileNameLabel( env, fileNameLabel );
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AutoReleaseString cfileName( env, fileName );
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AutoReleaseIShellItem cfolder( env, folder );
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AutoReleaseIShellItem csaveAsItem( env, saveAsItem );
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AutoReleaseIShellItem cdefaultFolder( env, defaultFolder );
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AutoReleaseString cdefaultExtension( env, defaultExtension );
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FilterSpec specs( env, fileTypes );
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// create IFileOpenDialog or IFileSaveDialog
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// https://learn.microsoft.com/en-us/windows/win32/shell/common-file-dialog
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AutoReleasePtr<IFileDialog> dialog;
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CHECK_HRESULT( ::CoCreateInstance( open ? CLSID_FileOpenDialog : CLSID_FileSaveDialog,
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NULL, CLSCTX_INPROC_SERVER, open ? IID_IFileOpenDialog : IID_IFileSaveDialog,
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reinterpret_cast<LPVOID*>( &dialog ) ) );
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// set title, etc.
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if( ctitle != NULL )
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CHECK_HRESULT( dialog->SetTitle( ctitle ) );
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if( cokButtonLabel != NULL )
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CHECK_HRESULT( dialog->SetOkButtonLabel( cokButtonLabel ) );
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if( cfileNameLabel != NULL )
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CHECK_HRESULT( dialog->SetFileNameLabel( cfileNameLabel ) );
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if( cfileName != NULL )
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CHECK_HRESULT( dialog->SetFileName( cfileName ) );
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if( cfolder != NULL )
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CHECK_HRESULT( dialog->SetFolder( cfolder ) );
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if( !open && csaveAsItem != NULL )
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CHECK_HRESULT( ((IFileSaveDialog*)(IFileDialog*)dialog)->SetSaveAsItem( csaveAsItem ) );
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if( cdefaultFolder != NULL )
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CHECK_HRESULT( dialog->SetDefaultFolder( cdefaultFolder ) );
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if( cdefaultExtension != NULL )
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CHECK_HRESULT( dialog->SetDefaultExtension( cdefaultExtension ) );
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// set options
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FILEOPENDIALOGOPTIONS existingOptions;
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CHECK_HRESULT( dialog->GetOptions( &existingOptions ) );
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CHECK_HRESULT( dialog->SetOptions ( (existingOptions & ~optionsClear) | optionsSet ) );
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// initialize filter
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if( specs.count > 0 ) {
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CHECK_HRESULT( dialog->SetFileTypes( specs.count, specs.specs ) );
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if( fileTypeIndex > 0 )
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CHECK_HRESULT( dialog->SetFileTypeIndex( min( fileTypeIndex + 1, specs.count ) ) );
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}
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// show dialog
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HWND hwndOwner = (owner != NULL) ? getWindowHandle( env, owner ) : NULL;
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HRESULT hr = dialog->Show( hwndOwner );
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if( hr == HRESULT_FROM_WIN32(ERROR_CANCELLED) )
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return newJavaStringArray( env, 0 );
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CHECK_HRESULT( hr );
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// convert shell items to Java string array
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if( open ) {
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AutoReleasePtr<IShellItemArray> shellItems;
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DWORD count;
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CHECK_HRESULT( ((IFileOpenDialog*)(IFileDialog*)dialog)->GetResults( &shellItems ) );
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CHECK_HRESULT( shellItems->GetCount( &count ) );
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jobjectArray array = newJavaStringArray( env, count );
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for( int i = 0; i < count; i++ ) {
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AutoReleasePtr<IShellItem> shellItem;
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LPWSTR path;
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CHECK_HRESULT( shellItems->GetItemAt( i, &shellItem ) );
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CHECK_HRESULT( shellItem->GetDisplayName( SIGDN_FILESYSPATH, &path ) );
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jstring jpath = newJavaString( env, path );
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CoTaskMemFree( path );
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env->SetObjectArrayElement( array, i, jpath );
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env->DeleteLocalRef( jpath );
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}
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return array;
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} else {
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AutoReleasePtr<IShellItem> shellItem;
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LPWSTR path;
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CHECK_HRESULT( dialog->GetResult( &shellItem ) );
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CHECK_HRESULT( shellItem->GetDisplayName( SIGDN_FILESYSPATH, &path ) );
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jstring jpath = newJavaString( env, path );
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CoTaskMemFree( path );
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jobjectArray array = newJavaStringArray( env, 1 );
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env->SetObjectArrayElement( array, 0, jpath );
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env->DeleteLocalRef( jpath );
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return array;
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}
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}
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