Add basic export code

CMakeLists.txt

@@ -9,17 +9,17 @@ project(logmeow CXX)
 find_package(SDL2 REQUIRED)
 find_package(Freetype 2 REQUIRED)
 find_package(nlohmann_json REQUIRED)
-list(APPEND LIBS -lpcre2-8 -lpcre2-posix SDL2 nlohmann_json::nlohmann_json imgui)
+list(APPEND LIBS -lpcre2-8 -lpcre2-posix SDL2 nlohmann_json::nlohmann_json imgui nfd)
 list(APPEND IMGUI_LIBS SDL2 Freetype::Freetype)
 
 set(INCLUDES "")
 set(SOURCES "")
 set(IMGUI_SOURCES "")
 set(DEFINITIONS "")
-# imgui include because <GH ISSUE LINK HERE>
+# imgui include because https://github.com/ocornut/imgui/issues/6184#issuecomment-1439570929
 list(APPEND INCLUDES thirdparty thirdparty/imgui /usr/include/SDL2)
 list(APPEND SOURCES main.cpp event_loop.cpp logcat_thread.cpp logcat_entry.cpp log.cpp config.cpp filters.cpp misc.cpp pcre2_wrapper.cpp
-    group_panel.cpp fragments/filters.cpp windows/logs.cpp windows/settings.cpp windows/main.cpp)
+    group_panel.cpp fragments/filters.cpp fragments/export.cpp windows/logs.cpp windows/settings.cpp windows/main.cpp)
 list(APPEND IMGUI_SOURCES thirdparty/imgui/imgui.cpp thirdparty/imgui/imgui_draw.cpp thirdparty/imgui/imgui_widgets.cpp thirdparty/imgui/imgui_tables.cpp
     thirdparty/imgui/misc/cpp/imgui_stdlib.cpp thirdparty/imgui/misc/freetype/imgui_freetype.cpp
     thirdparty/imgui/backends/imgui_impl_sdl2.cpp thirdparty/imgui/backends/imgui_impl_opengl3.cpp)
@@ -88,6 +88,9 @@ target_compile_definitions(imgui PRIVATE ${DEFINITIONS})
 # it seems like compilers may issue a warning for unknown warnings to ignore
 target_compile_options(imgui PRIVATE ${FLAGS} -Wno-unknown-warning-option -Wno-conversion)
 
+set(NFD_PORTAL ON)
+add_subdirectory(thirdparty/nativefiledialog-extended)
+
 add_executable(${PROJECT_NAME} ${SOURCES})
 set_target_properties(${PROJECT_NAME}
     PROPERTIES

config.cpp

@@ -1,29 +1,13 @@
 #include <cstdlib>
-#include <cstring>
 #include <sys/stat.h>
 #include <string>
 #include <nlohmann/json.hpp>
 
 #include "log.h"
+#include "file.h"
 #include "misc.h"
 #include "config.h"
 
-static FILE* fopen_or_raise(const char* __restrict path, const char* __restrict mode, bool ignore_enoent) {
-    FILE* file = fopen(path, mode);
-    if (!file && !(ignore_enoent && errno == ENOENT)) {
-        throw_system_error(std::string("fopen(") + quote(path) + ')');
-    }
-    return file;
-}
-
-static void fclose_and_log(FILE* file) {
-    if (!fclose(file)) {
-        return;
-    }
-    log(std::string("Failed to close a file: fclose(): ") + strerror(errno));
-}
-
-
 std::string get_config_folder() {
     const char* path;
 
@@ -76,13 +60,15 @@ void from_json(const nlohmann::json& j, Config& config) {
 
 Config load_config() {
     std::string config_file_path = get_config_file_path();
-    std::unique_ptr<FILE, decltype(&fclose_and_log)> config_file(fopen_or_raise(config_file_path.c_str(), "r", true), fclose_and_log);
-
-    if (!config_file) {
+    try {
+        File config_file(config_file_path.c_str(), "r");
+        return nlohmann::json::parse(config_file.get());
+    } catch (const std::system_error& e) {
+        if (e.code().value() != ENOENT) {
+            throw;
+        }
         return Config();
     }
-
-    return nlohmann::json::parse(config_file.get()).get<Config>();
 }
 
 
@@ -98,10 +84,11 @@ void write_config(const Config& config) {
     std::string config_file_path = get_config_file_path();
     std::string tmp_config_file_path = config_file_path + ".tmp";
 
-    std::unique_ptr<FILE, decltype(&fclose_and_log)> config_file(fopen_or_raise(tmp_config_file_path.c_str(), "w", false), fclose_and_log);
-    std::string str_config = nlohmann::json(config).dump(4);
-    fwrite(str_config.data(), sizeof(char), str_config.size(), config_file.get());
-    config_file.reset();
+    {
+        File config_file(tmp_config_file_path.c_str(), "w");
+        std::string str_config = nlohmann::json(config).dump(4);
+        config_file.write(std::move(str_config));
+    }
 
     if (!rename(tmp_config_file_path.c_str(), config_file_path.c_str())) {
         return;

event_loop.cpp

@@ -17,10 +17,10 @@ static inline void check_for_logcat_items(LogcatThread& logcat_thread, const Con
     LogcatThreadItem* logcat_thread_item;
 
     while ((logcat_thread_item = logcat_thread.atomic_ring_buffer.get())) {
-        if (std::holds_alternative<LogEntry>(*logcat_thread_item)) {
-            log(std::move(std::get<LogEntry>(*logcat_thread_item)), false);
-        } else if (std::holds_alternative<LogcatEntry>(*logcat_thread_item)) {
-            logcat_entries.push_back(std::move(std::get<LogcatEntry>(*logcat_thread_item)));
+        if (LogEntry* log_entry = std::get_if<LogEntry>(logcat_thread_item)) {
+            log(std::move(*log_entry), false);
+        } else if (LogcatEntry* logcat_entry = std::get_if<LogcatEntry>(logcat_thread_item)) {
+            logcat_entries.push_back(std::move(*logcat_entry));
             if (matches(logcat_entries.back(), active_config.filters, active_config.exclusions)) {
                 filtered_logcat_entry_offsets.push_back(logcat_entries.size() - 1);
             }

file.h

@@ -0,0 +1,65 @@
+#pragma once
+
+#include <cstdio>
+#include <string>
+
+#include "../log.h"
+#include "../misc.h"
+
+static void try_close(FILE* file);
+
+// Not usable for logcat thread!
+class File {
+public:
+    // https://stackoverflow.com/a/2173764
+    File(const File&) = delete;
+    File& operator=(const File&) = delete;
+
+    inline constexpr File(File&& other) {
+        try_close(this->_file);
+        this->_file = other._file;
+        other._file = nullptr;
+    }
+    inline constexpr File& operator=(File&& other) {
+        if (this == &other) {
+            return *this;
+        }
+
+        try_close(this->_file);
+        this->_file = other._file;
+        other._file = nullptr;
+
+        return *this;
+    }
+
+    File(const char* __restrict path, const char* __restrict mode) {
+        this->_file = fopen(path, mode);
+        if (!this->_file) {
+            throw_system_error(std::string("fopen(") + quote(path) + ')');
+        }
+    }
+    ~File() {
+        try_close(this->_file);
+    }
+
+    void write(const char* data, size_t length) {
+        if (fwrite(data, 1, length, this->_file) != length) {
+            throw_system_error("fwrite()");
+        }
+    }
+    inline constexpr void write(const std::string& str) {
+        this->write(str.data(), str.size());
+    }
+    inline constexpr FILE* get() const noexcept {
+        return this->_file;
+    }
+
+protected:
+    FILE* _file = nullptr;
+};
+
+static void try_close(FILE* file) {
+    if (file && fclose(file)) {
+        log(std::string("Failed to close a file: fclose(): ") + strerror(errno));
+    }
+}

fragments/export.cpp

@@ -0,0 +1,71 @@
+#include <imgui/imgui.h>
+#include <nativefiledialog-extended/src/include/nfd.h>
+#include <optional>
+
+#include "../file.h"
+#include "../logcat_entry.h"
+#include "export.h"
+
+enum class ExportAmount : int {
+    All = 0,
+    Filtered = 1,
+};
+
+static inline void export_logcat_entries(File& file, const std::vector<LogcatEntry>& logcat_entries,
+        const std::vector<size_t>& filtered_logcat_entry_offsets, ExportAmount export_amount, bool export_buffers);
+static inline std::optional<File> save_file_picker();
+
+void export_fragment(const std::vector<LogcatEntry>& logcat_entries, const std::vector<size_t>& filtered_logcat_entry_offsets) {
+    static ExportAmount export_amount = ExportAmount::Filtered;
+    static bool export_buffers = true;
+
+    ImGui::RadioButton("Export all entries", reinterpret_cast<int*>(&export_amount), static_cast<int>(ExportAmount::All));
+    ImGui::RadioButton("Export filtered entries", reinterpret_cast<int*>(&export_amount), static_cast<int>(ExportAmount::Filtered));
+    ImGui::Checkbox("Export buffers", &export_buffers);
+    ImGui::Separator();
+
+    if (ImGui::Button("Export to File")) {
+        std::optional<File> file = save_file_picker();
+        if (file) {
+            export_logcat_entries(*file, logcat_entries, filtered_logcat_entry_offsets, export_amount, export_buffers);
+            ImGui::CloseCurrentPopup();
+        }
+    }
+
+    ImGui::SameLine();
+    if (ImGui::Button("Export to Clipboard")) {
+        // TODO exist
+    }
+}
+
+static inline void export_logcat_entries(File& file, const std::vector<LogcatEntry>& logcat_entries,
+        const std::vector<size_t>& filtered_logcat_entry_offsets, ExportAmount export_amount, bool export_buffers) {
+    // TODO actually do the job
+    file.write(std::string("Count of all entries: ") + std::to_string(logcat_entries.size()) + '\n');
+    file.write(std::string("Count of filtered entries: ") + std::to_string(filtered_logcat_entry_offsets.size()) + '\n');
+    file.write(std::string("Export amount: ") + (export_amount == ExportAmount::All ? "all" : "filtered") + '\n');
+    file.write(std::string("Export buffers: ") + (export_buffers ? "true" : "false") + '\n');
+}
+
+static inline std::optional<File> save_file_picker() {
+    nfdchar_t* path;
+    nfdfilteritem_t filters[1] = {{"Log file", "log"}};
+    nfdresult_t res = NFD_SaveDialog(&path, filters, 1, nullptr, "logcat.log");
+
+    if (res == NFD_OKAY) {
+        try {
+            File file(path, "w");
+            NFD_FreePath(path);
+            return std::move(file);
+        } catch (const std::exception& e) {
+            NFD_FreePath(path);
+            log(std::string("Failed to open file from file picker: ") + e.what());
+        }
+    } else if (res == NFD_CANCEL) {
+        // dialog was canceled, shrug
+    } else {
+        log(std::string("Failed to open file picker: ") + NFD_GetError());
+    }
+
+    return std::nullopt;
+}

fragments/export.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <vector>
+#include <stddef.h>
+
+struct LogcatEntry; // forward declaration from ../logcat_entry.h
+
+void export_fragment(const std::vector<LogcatEntry>& logcat_entries, const std::vector<size_t>& filtered_logcat_entry_offsets);

main.cpp

@@ -12,6 +12,7 @@
 #else
     #include <SDL_opengl.h>
 #endif
+#include <nativefiledialog-extended/src/include/nfd.h>
 
 #include "log.h"
 #include "fonts.h"
@@ -47,6 +48,13 @@ int main() {
         return 1;
     }
 
+    // Setup NFDe
+    if (NFD_Init() != NFD_OKAY) {
+        SDL_Quit();
+        fprintf(stderr, "NFD_Init(): %s\n", NFD_GetError());
+        return 1;
+    }
+
     // Decide GL+GLSL versions
 #if defined(IMGUI_IMPL_OPENGL_ES2)
     // GL ES 2.0 + GLSL 100
@@ -178,6 +186,8 @@ int main() {
     ImGui_ImplSDL2_Shutdown();
     ImGui::DestroyContext();
 
+    NFD_Quit();
+
     SDL_GL_DeleteContext(gl_context);
     SDL_DestroyWindow(window);
     SDL_Quit();

thirdparty/imgui

@@ -1 +1 @@
-Subproject commit c9a53aa74d84cdb6471651f7b3da14d7248d58c7
+Subproject commit f65bcf481ab34cd07d3909aab1479f409fa79f2f

thirdparty/nativefiledialog-extended

@@ -0,0 +1 @@
+Subproject commit 7909f55d912fe353ee2df6b08eec9313b50685f7

windows/main.cpp

@@ -1,4 +1,5 @@
 #include <imgui/imgui.h>
+#include <imgui/imgui_internal.h>
 #include <ctime>
 #include <string>
 #include <vector>
@@ -7,6 +8,7 @@
 #include "../config.h"
 #include "../logcat_entry.h"
 #include "../logcat_thread.h"
+#include "../fragments/export.h"
 #include "main.h"
 
 static inline void render_table_item_context_menu(const LogcatEntry& logcat_entry) {
@@ -166,6 +168,17 @@ void main_window(bool latest_log_entries_read, ImFont* monospace_font, LogcatThr
         ImGui::EndDisabled();
     }
 
+    ImGui::SameLine();
+    ImGui::SeparatorEx(ImGuiSeparatorFlags_Vertical);
+    ImGui::SameLine();
+    if (ImGui::Button("Export")) {
+        ImGui::OpenPopup("export_logcat");
+    }
+    if (ImGui::BeginPopup("export_logcat")) {
+        export_fragment(logcat_entries, filtered_logcat_entry_offsets);
+        ImGui::EndPopup();
+    }
+
     ImGui::Separator();
     // copied from imgui/imgui_demo.cpp: [SECTION] Example App: Debug Console / ShowExampleAppConsole()
     // and [SECTION] Example App: Long Text / ShowExampleAppLongText()