FileManager: Start building a file manager.

Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/4d5fe394941

FileManager/.gitignore

@@ -0,0 +1,3 @@
+*.o
+*.d
+FileManager

FileManager/DirectoryView.cpp

@@ -0,0 +1,126 @@
+#include <dirent.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <SharedGraphics/GraphicsBitmap.h>
+#include <SharedGraphics/Painter.h>
+#include <AK/FileSystemPath.h>
+#include "DirectoryView.h"
+
+DirectoryView::DirectoryView(GWidget* parent)
+    : GWidget(parent)
+{
+    m_directory_icon = GraphicsBitmap::load_from_file("/res/icons/folder16.rgb", { 16, 16 });
+    m_file_icon = GraphicsBitmap::load_from_file("/res/icons/file16.rgb", { 16, 16 });
+    m_symlink_icon = GraphicsBitmap::load_from_file("/res/icons/link16.rgb", { 16, 16 });
+}
+
+DirectoryView::~DirectoryView()
+{
+}
+
+void DirectoryView::open(const String& path)
+{
+    if (m_path == path)
+        return;
+    m_path = path;
+    reload();
+    if (on_path_change)
+        on_path_change(m_path);
+    update();
+}
+
+void DirectoryView::reload()
+{
+    DIR* dirp = opendir(m_path.characters());
+    if (!dirp) {
+        perror("opendir");
+        exit(1);
+    }
+    m_directories.clear();
+    m_files.clear();
+    while (auto* de = readdir(dirp)) {
+        Entry entry;
+        entry.name = de->d_name;
+        struct stat st;
+        int rc = lstat(String::format("%s/%s", m_path.characters(), de->d_name).characters(), &st);
+        if (rc < 0) {
+            perror("lstat");
+            continue;
+        }
+        entry.size = st.st_size;
+        entry.mode = st.st_mode;
+        auto& entries = S_ISDIR(st.st_mode) ? m_directories : m_files;
+        entries.append(move(entry));
+    }
+    closedir(dirp);
+}
+
+const GraphicsBitmap& DirectoryView::icon_for(const Entry& entry) const
+{
+    if (S_ISDIR(entry.mode))
+        return *m_directory_icon;
+    if (S_ISLNK(entry.mode))
+        return *m_symlink_icon;
+    return *m_file_icon;
+}
+
+static String pretty_byte_size(size_t size)
+{
+    return String::format("%u", size);
+}
+
+bool DirectoryView::should_show_size_for(const Entry& entry) const
+{
+    return S_ISREG(entry.mode);
+}
+
+Rect DirectoryView::row_rect(int item_index) const
+{
+    return { 0, item_index * item_height(), width(), item_height() };
+}
+
+void DirectoryView::mousedown_event(GMouseEvent& event)
+{
+    for (int i = 0; i < item_count(); ++i) {
+        if (row_rect(i).contains(event.position())) {
+            auto& entry = this->entry(i);
+            if (entry.is_directory()) {
+                FileSystemPath new_path(String::format("%s/%s", m_path.characters(), entry.name.characters()));
+                open(new_path.string());
+            }
+        }
+    }
+}
+
+void DirectoryView::paint_event(GPaintEvent&)
+{
+    Painter painter(*this);
+
+    int horizontal_padding = 5;
+    int icon_size = 16;
+    int painted_item_index = 0;
+
+    auto process_entries = [&] (const Vector<Entry>& entries) {
+        for (size_t i = 0; i < entries.size(); ++i, ++painted_item_index) {
+            auto& entry = entries[i];
+            int y = painted_item_index * item_height();
+            Rect icon_rect(horizontal_padding, y, icon_size, item_height());
+            Rect name_rect(icon_rect.right() + horizontal_padding, y, 100, item_height());
+            Rect size_rect(name_rect.right() + horizontal_padding, y, 64, item_height());
+            painter.fill_rect(row_rect(painted_item_index), i % 2 ? Color::LightGray : Color::White);
+            painter.blit_with_alpha(icon_rect.location(), icon_for(entry), { 0, 0, icon_size, icon_size });
+            painter.draw_text(name_rect, entry.name, Painter::TextAlignment::CenterLeft, Color::Black);
+            if (should_show_size_for(entry))
+                painter.draw_text(size_rect, pretty_byte_size(entry.size), Painter::TextAlignment::CenterRight, Color::Black);
+        }
+    };
+
+    process_entries(m_directories);
+    process_entries(m_files);
+
+    Rect unpainted_rect(0, painted_item_index * item_height(), width(), height());
+    unpainted_rect.intersect(rect());
+    painter.fill_rect(unpainted_rect, Color::White);
+}

FileManager/DirectoryView.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <LibGUI/GWidget.h>
+#include <AK/Function.h>
+#include <sys/stat.h>
+
+class DirectoryView final : public GWidget {
+public:
+    DirectoryView(GWidget* parent);
+    virtual ~DirectoryView() override;
+
+    void open(const String& path);
+    void reload();
+
+    Function<void(const String&)> on_path_change;
+
+    int item_height() const { return 16; }
+    int item_count() const { return m_directories.size() + m_files.size(); }
+
+private:
+    virtual void paint_event(GPaintEvent&) override;
+    virtual void mousedown_event(GMouseEvent&) override;
+
+    Rect row_rect(int item_index) const;
+
+    struct Entry {
+        String name;
+        size_t size { 0 };
+        mode_t mode { 0 };
+
+        bool is_directory() const { return S_ISDIR(mode); }
+    };
+
+    const Entry& entry(size_t index) const
+    {
+        if (index < m_directories.size())
+            return m_directories[index];
+        return m_files[index - m_directories.size()];
+    }
+    const GraphicsBitmap& icon_for(const Entry&) const;
+    bool should_show_size_for(const Entry&) const;
+
+    Vector<Entry> m_files;
+    Vector<Entry> m_directories;
+
+    String m_path;
+    RetainPtr<GraphicsBitmap> m_directory_icon;
+    RetainPtr<GraphicsBitmap> m_file_icon;
+    RetainPtr<GraphicsBitmap> m_symlink_icon;
+};

FileManager/Makefile

@@ -0,0 +1,35 @@
+OBJS = \
+    DirectoryView.o \
+    main.o
+
+APP = FileManager
+
+ARCH_FLAGS =
+STANDARD_FLAGS = -std=c++17 -nostdinc++ -nostdlib -nostdinc
+USERLAND_FLAGS = -ffreestanding -fno-stack-protector -fno-ident
+WARNING_FLAGS = -Wextra -Wall -Wundef -Wcast-qual -Wwrite-strings
+FLAVOR_FLAGS = -march=i386 -m32 -fno-exceptions -fno-rtti -fmerge-all-constants -fno-unroll-loops -fno-pie -fno-pic
+OPTIMIZATION_FLAGS = -Oz -fno-asynchronous-unwind-tables
+INCLUDE_FLAGS = -I.. -I. -I../LibC
+
+DEFINES = -DSERENITY -DSANITIZE_PTRS -DUSERLAND
+
+CXXFLAGS = -MMD -MP $(WARNING_FLAGS) $(OPTIMIZATION_FLAGS) $(USERLAND_FLAGS) $(FLAVOR_FLAGS) $(ARCH_FLAGS) $(STANDARD_FLAGS) $(INCLUDE_FLAGS) $(DEFINES)
+CXX = clang
+LD = ld
+AR = ar
+LDFLAGS = -static --strip-debug -melf_i386 -e _start --gc-sections
+
+all: $(APP)
+
+$(APP): $(OBJS)
+	$(LD) -o $(APP) $(LDFLAGS) $(OBJS) ../LibGUI/LibGUI.a ../LibC/LibC.a
+
+.cpp.o:
+	@echo "CXX $<"; $(CXX) $(CXXFLAGS) -o $@ -c $<
+
+-include $(OBJS:%.o=%.d)
+
+clean:
+	@echo "CLEAN"; rm -f $(APPS) $(OBJS) *.d
+

FileManager/main.cpp

@@ -0,0 +1,47 @@
+#include <SharedGraphics/GraphicsBitmap.h>
+#include <LibGUI/GWindow.h>
+#include <LibGUI/GWidget.h>
+#include <LibGUI/GButton.h>
+#include <LibGUI/GListBox.h>
+#include <LibGUI/GEventLoop.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include "DirectoryView.h"
+
+static GWindow* make_window();
+
+int main(int, char**)
+{
+    GEventLoop loop;
+
+    auto* window = make_window();
+    window->set_should_exit_app_on_close(true);
+    window->show();
+
+    return loop.exec();
+}
+
+GWindow* make_window()
+{
+    auto* window = new GWindow;
+    window->set_title("FileManager");
+    window->set_rect(20, 200, 240, 300);
+
+    auto* widget = new GWidget;
+    window->set_main_widget(widget);
+
+    auto* directory_view = new DirectoryView(widget);
+    directory_view->set_relative_rect({ 0, 0, 240, 300 });
+
+    directory_view->on_path_change = [window] (const String& new_path) {
+        window->set_title(String::format("FileManager: %s", new_path.characters()));
+    };
+
+    directory_view->open("/");
+
+    return window;
+}
+

Kernel/init.cpp

@@ -29,6 +29,7 @@
 #define SPAWN_LAUNCHER
 //#define SPAWN_GUITEST2
 #define SPAWN_CLOCK
+#define SPAWN_FILE_MANAGER
 //#define SPAWN_FONTEDITOR
 //#define SPAWN_MULTIPLE_SHELLS
 //#define STRESS_TEST_SPAWNING
@@ -120,6 +121,9 @@ static void init_stage2()
 #ifdef SPAWN_CLOCK
     Process::create_user_process("/bin/Clock", (uid_t)100, (gid_t)100, (pid_t)0, error, { }, move(environment), tty0);
 #endif
+#ifdef SPAWN_FILE_MANAGER
+    Process::create_user_process("/bin/FileManager", (uid_t)100, (gid_t)100, (pid_t)0, error, { }, move(environment), tty0);
+#endif
 #ifdef SPAWN_FONTEDITOR
     Process::create_user_process("/bin/FontEditor", (uid_t)100, (gid_t)100, (pid_t)0, error, { }, move(environment), tty0);
 #endif

Kernel/makeall.sh

@@ -16,6 +16,8 @@ make -C ../Clock clean && \
 make -C ../Clock && \
 make -C ../Launcher clean && \
 make -C ../Launcher && \
+make -C ../FileManager clean && \
+make -C ../FileManager && \
 make clean &&\
 make && \
 sudo ./sync.sh

Kernel/sync.sh

@@ -8,6 +8,8 @@ mount -o loop _fs_contents mnt/
 mkdir -vp mnt/bin
 mkdir -vp mnt/etc
 mkdir -vp mnt/proc
+mkdir -vp mnt/tmp
+chmod 1777 mnt/tmp
 mkdir -vp mnt/dev
 mkdir -vp mnt/dev/pts
 mknod mnt/dev/tty0 c 4 0
@@ -54,13 +56,12 @@ cp -v ../Terminal/Terminal mnt/bin/Terminal
 cp -v ../FontEditor/FontEditor mnt/bin/FontEditor
 cp -v ../Launcher/Launcher mnt/bin/Launcher
 cp -v ../Clock/Clock mnt/bin/Clock
+cp -v ../FileManager/FileManager mnt/bin/FileManager
 cp -v ../Userland/pape mnt/bin/pape
 cp -v ../Userland/dmesg mnt/bin/dmesg
 cp -v ../Userland/chmod mnt/bin/chmod
 cp -v ../Userland/top mnt/bin/top
 cp -v kernel.map mnt/
-ln -s dir_a mnt/dir_cur
-ln -s nowhere mnt/bad_link
 sh sync-local.sh
 umount mnt
 sync