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ImHex/source/views/view_pattern_editor.cpp

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#include "views/view_pattern_editor.hpp"
#include "helpers/project_file_handler.hpp"
#include <hex/helpers/utils.hpp>
#include <hex/lang/preprocessor.hpp>
#include <magic.h>
#include <imgui_imhex_extensions.h>
namespace hex {
static const TextEditor::LanguageDefinition& PatternLanguage() {
static bool initialized = false;
static TextEditor::LanguageDefinition langDef;
if (!initialized) {
static const char* const keywords[] = {
"using", "struct", "union", "enum", "bitfield", "be", "le", "if", "else", "false", "true", "parent", "addressof", "sizeof", "$", "while", "fn", "return", "namespace"
};
for (auto& k : keywords)
langDef.mKeywords.insert(k);
static std::pair<const char* const, size_t> builtInTypes[] = {
{ "u8", 1 }, { "u16", 2 }, { "u32", 4 }, { "u64", 8 }, { "u128", 16 },
{ "s8", 1 }, { "s16", 2 }, { "s32", 4 }, { "s64", 8 }, { "s128", 16 },
{ "float", 4 }, { "double", 8 }, { "char", 1 }, { "char16", 2 }, { "bool", 1 }, { "padding", 1 }
};
for (const auto &[name, size] : builtInTypes) {
TextEditor::Identifier id;
id.mDeclaration = std::to_string(size);
id.mDeclaration += size == 1 ? " byte" : " bytes";
langDef.mIdentifiers.insert(std::make_pair(std::string(name), id));
}
langDef.mTokenize = [](const char * inBegin, const char * inEnd, const char *& outBegin, const char *& outEnd, TextEditor::PaletteIndex & paletteIndex) -> bool {
paletteIndex = TextEditor::PaletteIndex::Max;
while (inBegin < inEnd && isascii(*inBegin) && isblank(*inBegin))
inBegin++;
if (inBegin == inEnd) {
outBegin = inEnd;
outEnd = inEnd;
paletteIndex = TextEditor::PaletteIndex::Default;
}
else if (TokenizeCStyleIdentifier(inBegin, inEnd, outBegin, outEnd)) {
paletteIndex = TextEditor::PaletteIndex::Identifier;
}
else if (TokenizeCStyleNumber(inBegin, inEnd, outBegin, outEnd))
paletteIndex = TextEditor::PaletteIndex::Number;
else if (TokenizeCStyleCharacterLiteral(inBegin, inEnd, outBegin, outEnd))
paletteIndex = TextEditor::PaletteIndex::CharLiteral;
else if (TokenizeCStyleString(inBegin, inEnd, outBegin, outEnd))
paletteIndex = TextEditor::PaletteIndex::String;
return paletteIndex != TextEditor::PaletteIndex::Max;
};
langDef.mCommentStart = "/*";
langDef.mCommentEnd = "*/";
langDef.mSingleLineComment = "//";
langDef.mCaseSensitive = true;
langDef.mAutoIndentation = true;
langDef.mPreprocChar = '#';
langDef.mName = "Pattern Language";
initialized = true;
}
return langDef;
}
ViewPatternEditor::ViewPatternEditor() : View("hex.view.pattern.name") {
this->m_patternLanguageRuntime = new lang::PatternLanguage();
this->m_textEditor.SetLanguageDefinition(PatternLanguage());
this->m_textEditor.SetShowWhitespaces(false);
EventManager::subscribe<EventProjectFileStore>(this, [this]() {
ProjectFile::setPattern(this->m_textEditor.GetText());
});
EventManager::subscribe<EventProjectFileLoad>(this, [this]() {
this->m_textEditor.SetText(ProjectFile::getPattern());
this->parsePattern(this->m_textEditor.GetText().data());
});
EventManager::subscribe<RequestAppendPatternLanguageCode>(this, [this](std::string code) {
this->m_textEditor.InsertText("\n");
this->m_textEditor.InsertText(code);
});
EventManager::subscribe<EventFileLoaded>(this, [this](const std::string &path) {
if (this->m_textEditor.GetText().find_first_not_of(" \f\n\r\t\v") != std::string::npos)
return;
lang::Preprocessor preprocessor;
std::string magicFiles;
std::error_code error;
for (const auto &dir : hex::getPath(ImHexPath::Magic)) {
if (!std::filesystem::is_directory(dir))
continue;
for (const auto &entry : std::filesystem::directory_iterator(dir, error)) {
if (entry.is_regular_file() && entry.path().extension() == ".mgc")
magicFiles += entry.path().string() + MAGIC_PATH_SEPARATOR;
}
}
if (error)
return;
auto provider = SharedData::currentProvider;
if (provider == nullptr)
return;
std::vector<u8> buffer(std::min(provider->getSize(), size_t(0xFFFF)), 0x00);
provider->readRelative(0, buffer.data(), buffer.size());
std::string mimeType;
magic_t cookie = magic_open(MAGIC_MIME_TYPE);
if (magic_load(cookie, magicFiles.c_str()) != -1)
mimeType = magic_buffer(cookie, buffer.data(), buffer.size());
magic_close(cookie);
bool foundCorrectType = false;
preprocessor.addPragmaHandler("MIME", [&mimeType, &foundCorrectType](std::string value) {
if (value == mimeType) {
foundCorrectType = true;
return true;
}
return !std::all_of(value.begin(), value.end(), isspace) && !value.ends_with('\n') && !value.ends_with('\r');
});
preprocessor.addDefaultPragmaHandlers();
this->m_possiblePatternFiles.clear();
std::error_code errorCode;
for (const auto &dir : hex::getPath(ImHexPath::Patterns)) {
for (auto &entry : std::filesystem::directory_iterator(dir, errorCode)) {
if (!entry.is_regular_file())
continue;
FILE *file = fopen(entry.path().string().c_str(), "r");
if (file == nullptr)
continue;
fseek(file, 0, SEEK_END);
size_t size = ftell(file);
rewind(file);
std::vector<char> patternBuffer( size + 1, 0x00);
fread(patternBuffer.data(), 1, size, file);
fclose(file);
preprocessor.preprocess(patternBuffer.data());
if (foundCorrectType)
this->m_possiblePatternFiles.push_back(entry.path().string());
}
}
if (!this->m_possiblePatternFiles.empty()) {
this->m_selectedPatternFile = 0;
View::doLater([] { ImGui::OpenPopup("hex.view.pattern.accept_pattern"_lang); });
}
});
/* Settings */
{
EventManager::subscribe<EventSettingsChanged>(this, [this]() {
auto theme = ContentRegistry::Settings::getSetting("hex.builtin.setting.interface", "hex.builtin.setting.interface.color");
if (theme.is_number()) {
switch (static_cast<int>(theme)) {
default:
case 0: /* Dark theme */
this->m_textEditor.SetPalette(TextEditor::GetDarkPalette());
break;
case 1: /* Light theme */
this->m_textEditor.SetPalette(TextEditor::GetLightPalette());
break;
case 2: /* Classic theme */
this->m_textEditor.SetPalette(TextEditor::GetRetroBluePalette());
break;
}
}
});
}
}
ViewPatternEditor::~ViewPatternEditor() {
delete this->m_patternLanguageRuntime;
EventManager::unsubscribe<EventProjectFileStore>(this);
EventManager::unsubscribe<EventProjectFileLoad>(this);
EventManager::unsubscribe<RequestAppendPatternLanguageCode>(this);
EventManager::unsubscribe<EventFileLoaded>(this);
EventManager::unsubscribe<EventSettingsChanged>(this);
}
void ViewPatternEditor::drawMenu() {
if (ImGui::BeginMenu("hex.menu.file"_lang)) {
if (ImGui::MenuItem("hex.view.pattern.menu.file.load_pattern"_lang)) {
hex::openFileBrowser("hex.view.pattern.open_pattern"_lang, DialogMode::Open, { { "Pattern File", "hexpat" } }, [this](auto path) {
this->loadPatternFile(path);
});
}
ImGui::EndMenu();
}
}
void ViewPatternEditor::drawContent() {
if (ImGui::Begin(View::toWindowName("hex.view.pattern.name").c_str(), &this->getWindowOpenState(), ImGuiWindowFlags_None | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoScrollWithMouse)) {
auto provider = SharedData::currentProvider;
if (provider != nullptr && provider->isAvailable()) {
auto textEditorSize = ImGui::GetContentRegionAvail();
textEditorSize.y *= 4.0/5.0;
textEditorSize.y -= ImGui::GetTextLineHeightWithSpacing();
this->m_textEditor.Render("hex.view.pattern.name"_lang, textEditorSize, true);
auto consoleSize = ImGui::GetContentRegionAvail();
consoleSize.y -= ImGui::GetTextLineHeightWithSpacing();
ImGui::PushStyleColor(ImGuiCol_ChildBg, this->m_textEditor.GetPalette()[u32(TextEditor::PaletteIndex::Background)]);
if (ImGui::BeginChild("##console", consoleSize, true, ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
for (auto &[level, message] : this->m_console) {
switch (level) {
case lang::LogConsole::Level::Debug:
ImGui::PushStyleColor(ImGuiCol_Text, this->m_textEditor.GetPalette()[u32(TextEditor::PaletteIndex::Comment)]);
break;
case lang::LogConsole::Level::Info:
ImGui::PushStyleColor(ImGuiCol_Text, this->m_textEditor.GetPalette()[u32(TextEditor::PaletteIndex::Default)]);
break;
case lang::LogConsole::Level::Warning:
ImGui::PushStyleColor(ImGuiCol_Text, this->m_textEditor.GetPalette()[u32(TextEditor::PaletteIndex::Preprocessor)]);
break;
case lang::LogConsole::Level::Error:
ImGui::PushStyleColor(ImGuiCol_Text, this->m_textEditor.GetPalette()[u32(TextEditor::PaletteIndex::ErrorMarker)]);
break;
default: continue;
}
ImGui::TextUnformatted(message.c_str());
ImGui::PopStyleColor();
}
}
ImGui::EndChild();
ImGui::PopStyleColor(1);
ImGui::Disabled([this] {
ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(ImColor(0x20, 0x85, 0x20)));
ImGui::PushStyleVar(ImGuiStyleVar_FrameBorderSize, 1);
if (ImGui::ArrowButton("evaluate", ImGuiDir_Right))
this->parsePattern(this->m_textEditor.GetText().data());
ImGui::PopStyleVar();
ImGui::PopStyleColor();
}, this->m_evaluatorRunning);
ImGui::SameLine();
if (this->m_evaluatorRunning)
ImGui::TextSpinner("hex.view.pattern.evaluating"_lang);
else
ImGui::Checkbox("hex.view.pattern.auto"_lang, &this->m_runAutomatically);
if (this->m_textEditor.IsTextChanged()) {
if (this->m_runAutomatically)
this->parsePattern(this->m_textEditor.GetText().data());
ProjectFile::markDirty();
}
}
View::discardNavigationRequests();
}
ImGui::End();
}
void ViewPatternEditor::drawAlwaysVisible() {
if (ImGui::BeginPopupModal("hex.view.pattern.accept_pattern"_lang, nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
ImGui::TextWrapped("hex.view.pattern.accept_pattern.desc"_lang);
std::vector<std::string> entries;
entries.resize(this->m_possiblePatternFiles.size());
for (u32 i = 0; i < entries.size(); i++) {
entries[i] = std::filesystem::path(this->m_possiblePatternFiles[i]).filename().string();
}
ImGui::ListBox("hex.view.pattern.accept_pattern.patterns"_lang, &this->m_selectedPatternFile, [](void *data, int id, const char** outText) -> bool {
auto &entries = *static_cast<std::vector<std::string>*>(data);
*outText = entries[id].c_str();
return true;
}, &entries, entries.size(), 4);
ImGui::NewLine();
ImGui::Text("hex.view.pattern.accept_pattern.question"_lang);
confirmButtons("hex.common.yes"_lang, "hex.common.no"_lang, [this]{
this->loadPatternFile(this->m_possiblePatternFiles[this->m_selectedPatternFile]);
ImGui::CloseCurrentPopup();
}, []{
ImGui::CloseCurrentPopup();
});
if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_Escape)))
ImGui::CloseCurrentPopup();
ImGui::EndPopup();
}
}
void ViewPatternEditor::loadPatternFile(std::string_view path) {
FILE *file = fopen(path.data(), "rb");
if (file != nullptr) {
char *buffer;
fseek(file, 0, SEEK_END);
size_t size = ftell(file);
rewind(file);
buffer = new char[size + 1];
fread(buffer, size, 1, file);
buffer[size] = 0x00;
fclose(file);
this->parsePattern(buffer);
this->m_textEditor.SetText(buffer);
delete[] buffer;
}
}
void ViewPatternEditor::clearPatternData() {
for (auto &data : SharedData::patternData)
delete data;
SharedData::patternData.clear();
lang::PatternData::resetPalette();
}
void ViewPatternEditor::parsePattern(char *buffer) {
this->m_evaluatorRunning = true;
this->clearPatternData();
this->m_textEditor.SetErrorMarkers({ });
this->m_console.clear();
EventManager::post<EventPatternChanged>();
std::thread([this, buffer = std::string(buffer)] {
auto result = this->m_patternLanguageRuntime->executeString(SharedData::currentProvider, buffer);
auto error = this->m_patternLanguageRuntime->getError();
if (error.has_value()) {
this->m_textEditor.SetErrorMarkers({ error.value() });
}
this->m_console = this->m_patternLanguageRuntime->getConsoleLog();
if (result.has_value()) {
SharedData::patternData = std::move(result.value());
View::doLater([]{
EventManager::post<EventPatternChanged>();
});
}
this->m_evaluatorRunning = false;
}).detach();
}
}
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