Textractor_test/GUI/extenwindow.cpp

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#include "extenwindow.h"
#include "ui_extenwindow.h"
#include "defs.h"
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#include <concrt.h>
#include <QMenu>
#include <QFileDialog>
#include <QDragEnterEvent>
#include <QDropEvent>
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#include <QMimeData>
#include <QUrl>
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extern const char* EXTENSIONS;
extern const char* ADD_EXTENSION;
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extern const char* INVALID_EXTENSION;
extern const char* CONFIRM_EXTENSION_OVERWRITE;
extern const char* EXTENSION_WRITE_ERROR;
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extern const char* EXTEN_WINDOW_INSTRUCTIONS;
constexpr auto DEFAULT_EXTENSIONS = u8"Remove Repeated Characters>Remove Repeated Phrases>Regex Filter>Copy to Clipboard>Bing Translate>Extra Window>Extra Newlines";
namespace
{
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struct Extension
{
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std::wstring name;
wchar_t* (*callback)(wchar_t*, const InfoForExtension*);
};
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concurrency::reader_writer_lock extenMutex;
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std::vector<Extension> extensions;
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bool Load(QString extenName)
{
// Extension is dll and exports "OnNewSentence"
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if (QTextFile(extenName + ".dll", QIODevice::ReadOnly).readAll().contains("OnNewSentence"))
{
if (HMODULE module = LoadLibraryW(S(extenName).c_str()))
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{
if (auto callback = (decltype(Extension::callback))GetProcAddress(LoadLibraryOnce(S(extenName)), "OnNewSentence"))
{
std::scoped_lock writeLock(extenMutex);
extensions.push_back({ S(extenName), callback });
return true;
}
FreeLibrary(module);
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}
}
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return false;
}
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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)
{
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wchar_t* sentenceBuffer = (wchar_t*)HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS, (sentence.size() + 1) * sizeof(wchar_t));
wcscpy_s(sentenceBuffer, sentence.size() + 1, sentence.c_str());
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concurrency::reader_writer_lock::scoped_lock_read readLock(extenMutex);
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for (const auto& extension : extensions)
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if (*(sentenceBuffer = extension.callback(sentenceBuffer, miscInfo)) == L'\0') break;
sentence = sentenceBuffer;
HeapFree(GetProcessHeap(), 0, sentenceBuffer);
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return !sentence.empty();
}
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void CleanupExtensions()
{
std::scoped_lock writeLock(extenMutex);
for (auto extension : extensions) FreeLibrary(GetModuleHandleW(extension.name.c_str()));
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extensions.clear();
}
ExtenWindow::ExtenWindow(QWidget* parent) :
QMainWindow(parent, Qt::WindowCloseButtonHint),
ui(new Ui::ExtenWindow)
{
ui->setupUi(this);
connect(ui->extenList, &QListWidget::customContextMenuRequested, [this](QPoint point)
{
if (QMenu(this).exec({ std::make_unique<QAction>(ADD_EXTENSION).get() }, ui->extenList->mapToGlobal(point)))
if (QString extenFile = QFileDialog::getOpenFileName(this, ADD_EXTENSION, ".", EXTENSIONS + QString(" (*.dll)")); !extenFile.isEmpty()) Add(extenFile);
});
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;
}
void ExtenWindow::Add(QFileInfo extenFile)
{
if (extenFile.suffix() == "dll")
{
if (extenFile.absolutePath() != QDir::currentPath())
{
if (QFile::exists(extenFile.fileName()) && QMessageBox::question(this, EXTENSIONS, CONFIRM_EXTENSION_OVERWRITE) == QMessageBox::Yes) QFile::remove(extenFile.fileName());
if (!QFile::copy(extenFile.absoluteFilePath(), extenFile.fileName())) QMessageBox::warning(this, EXTENSIONS, EXTENSION_WRITE_ERROR);
}
if (Load(extenFile.completeBaseName())) return Sync();
}
QMessageBox::information(this, EXTENSIONS, QString(INVALID_EXTENSION).arg(extenFile.fileName()));
}
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void ExtenWindow::Sync()
{
ui->extenList->clear();
QTextFile extenSaveFile(EXTEN_SAVE_FILE, QIODevice::WriteOnly | QIODevice::Truncate);
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concurrency::reader_writer_lock::scoped_lock_read 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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}
}
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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())
{
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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)
{
for (auto file : event->mimeData()->urls()) Add(file.toLocalFile());
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}