Textractor_test/GUI/extenwindow.cpp

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#include "extenwindow.h"
#include "ui_extenwindow.h"
#include "defs.h"
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#include "text.h"
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#include "types.h"
#include "misc.h"
#include <QDragEnterEvent>
#include <QDropEvent>
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#include <QMimeData>
#include <QUrl>
#include <QLabel>
namespace
{
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struct Extension
{
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std::wstring name;
wchar_t*(*callback)(wchar_t*, const InfoForExtension*);
};
class : std::shared_mutex
{
public:
void lock() { ++queuedWrites; shared_mutex::lock(); }
void unlock() { --queuedWrites; shared_mutex::unlock(); }
void lock_shared() { while (queuedWrites) Sleep(100); shared_mutex::lock_shared(); }
void unlock_shared() { shared_mutex::unlock_shared(); }
private:
std::atomic<int> queuedWrites = 0;
} extenMutex;
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std::vector<Extension> extensions;
void Load(QString extenName)
{
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if (extenName == ITH_DLL) return;
// Extension is dll and exports "OnNewSentence"
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if (auto callback = (decltype(Extension::callback))GetProcAddress(LoadLibraryOnce(S(extenName)), "OnNewSentence"))
{
std::scoped_lock writeLock(extenMutex);
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extensions.push_back({ S(extenName), callback });
}
}
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void Unload(int index)
{
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std::scoped_lock writeLock(extenMutex);
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FreeLibrary(GetModuleHandleW(extensions.at(index).name.c_str()));
extensions.erase(extensions.begin() + index);
}
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void Reorder(QStringList extenNames)
{
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std::scoped_lock writeLock(extenMutex);
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std::vector<Extension> extensions;
for (auto extenName : extenNames)
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extensions.push_back(*std::find_if(::extensions.begin(), ::extensions.end(), [&](auto extension) { return extension.name == S(extenName); }));
::extensions = extensions;
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}
}
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bool DispatchSentenceToExtensions(std::wstring& sentence, const InfoForExtension* miscInfo)
{
wchar_t* sentenceBuffer = (wchar_t*)HeapAlloc(GetProcessHeap(), 0, (sentence.size() + 1) * sizeof(wchar_t));
wcscpy_s(sentenceBuffer, sentence.size() + 1, sentence.c_str());
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std::shared_lock readLock(extenMutex);
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for (const auto& extension : extensions)
{
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wchar_t* nextBuffer = extension.callback(sentenceBuffer, miscInfo);
if (nextBuffer != sentenceBuffer) HeapFree(GetProcessHeap(), 0, sentenceBuffer);
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if (nextBuffer == nullptr) return false;
sentenceBuffer = nextBuffer;
}
sentence = sentenceBuffer;
HeapFree(GetProcessHeap(), 0, sentenceBuffer);
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return true;
}
ExtenWindow::ExtenWindow(QWidget* parent) :
QMainWindow(parent, Qt::WindowCloseButtonHint),
ui(new Ui::ExtenWindow)
{
ui->setupUi(this);
ui->vboxLayout->addWidget(new QLabel(EXTEN_WINDOW_INSTRUCTIONS, this));
setWindowTitle(EXTENSIONS);
ui->extenList->installEventFilter(this);
if (!QFile::exists(EXTEN_SAVE_FILE)) QTextFile(EXTEN_SAVE_FILE, QIODevice::WriteOnly).write(DEFAULT_EXTENSIONS);
for (auto extenName : QString(QTextFile(EXTEN_SAVE_FILE, QIODevice::ReadOnly).readAll()).split(">")) Load(extenName);
Sync();
}
ExtenWindow::~ExtenWindow()
{
delete ui;
}
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void ExtenWindow::Sync()
{
ui->extenList->clear();
QTextFile extenSaveFile(EXTEN_SAVE_FILE, QIODevice::WriteOnly | QIODevice::Truncate);
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std::shared_lock readLock(extenMutex);
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for (auto extension : extensions)
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{
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ui->extenList->addItem(S(extension.name));
extenSaveFile.write((S(extension.name) + ">").toUtf8());
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}
}
void ExtenWindow::Add(QFileInfo extenFile)
{
if (extenFile.suffix() != "dll") return;
QFile::copy(extenFile.absoluteFilePath(), extenFile.fileName());
Load(extenFile.completeBaseName());
Sync();
}
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bool ExtenWindow::eventFilter(QObject* target, QEvent* event)
{
// See https://stackoverflow.com/questions/1224432/how-do-i-respond-to-an-internal-drag-and-drop-operation-using-a-qlistwidget/1528215
if (event->type() == QEvent::ChildRemoved)
{
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QStringList extenNames;
for (int i = 0; i < ui->extenList->count(); ++i) extenNames.push_back(ui->extenList->item(i)->text());
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Reorder(extenNames);
Sync();
}
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return false;
}
void ExtenWindow::keyPressEvent(QKeyEvent* event)
{
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if (event->key() == Qt::Key_Delete && ui->extenList->currentItem() != nullptr)
{
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Unload(ui->extenList->currentIndex().row());
Sync();
}
}
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void ExtenWindow::dragEnterEvent(QDragEnterEvent* event)
{
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event->acceptProposedAction();
}
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void ExtenWindow::dropEvent(QDropEvent* event)
{
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for (auto file : event->mimeData()->urls()) Add(file.toLocalFile());
}