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#include <LibGUI/GFileSystemModel.h>
#include <AK/FileSystemPath.h>
#include <AK/StringBuilder.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
struct GFileSystemModel::Node {
String name;
Node* parent { nullptr };
Vector<Node*> children;
enum Type { Unknown, Directory, File };
Type type { Unknown };
bool has_traversed { false };
GModelIndex index(const GFileSystemModel& model) const
{
if (!parent)
return model.create_index(0, 0, (void*)this);
for (int row = 0; row < parent->children.size(); ++row) {
if (parent->children[row] == this)
return model.create_index(row, 0, (void*)this);
}
ASSERT_NOT_REACHED();
}
void traverse_if_needed(const GFileSystemModel& model)
{
if (type != Node::Directory || has_traversed)
return;
has_traversed = true;
auto full_path = this->full_path(model);
DIR* dirp = opendir(full_path.characters());
if (!dirp)
return;
while (auto* de = readdir(dirp)) {
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
continue;
struct stat st;
int rc = lstat(String::format("%s/%s", full_path.characters(), de->d_name).characters(), &st);
if (rc < 0) {
perror("lstat");
continue;
}
if (model.m_mode == DirectoriesOnly && !S_ISDIR(st.st_mode))
continue;
auto* child = new Node;
child->name = de->d_name;
child->type = S_ISDIR(st.st_mode) ? Node::Type::Directory : Node::Type::File;
child->parent = this;
children.append(child);
}
closedir(dirp);
}
void reify_if_needed(const GFileSystemModel& model)
{
traverse_if_needed(model);
if (type != Node::Type::Unknown)
return;
struct stat st;
auto full_path = this->full_path(model);
int rc = lstat(full_path.characters(), &st);
dbgprintf("lstat(%s) = %d\n", full_path.characters(), rc);
if (rc < 0) {
perror("lstat");
return;
}
type = S_ISDIR(st.st_mode) ? Node::Type::Directory : Node::Type::File;
}
String full_path(const GFileSystemModel& model) const
{
Vector<String> lineage;
for (auto* ancestor = parent; ancestor; ancestor = ancestor->parent) {
lineage.append(ancestor->name);
}
StringBuilder builder;
builder.append(model.root_path());
for (int i = lineage.size() - 1; i >= 0; --i) {
builder.append('/');
builder.append(lineage[i]);
}
builder.append('/');
builder.append(name);
return FileSystemPath(builder.to_string()).string();
}
};
GModelIndex GFileSystemModel::index(const String& path) const
{
FileSystemPath canonical_path(path);
const Node* node = m_root;
if (canonical_path.string() == "/")
return m_root->index(*this);
for (int i = 0; i < canonical_path.parts().size(); ++i) {
auto& part = canonical_path.parts()[i];
bool found = false;
for (auto& child : node->children) {
if (child->name == part) {
node = child;
found = true;
if (i == canonical_path.parts().size() - 1)
return node->index(*this);
break;
}
}
if (!found)
return { };
}
return { };
}
String GFileSystemModel::path(const GModelIndex& index) const
{
if (!index.is_valid())
return { };
auto& node = *(Node*)index.internal_data();
node.reify_if_needed(*this);
return node.full_path(*this);
}
GFileSystemModel::GFileSystemModel(const String& root_path, Mode mode)
: m_root_path(FileSystemPath(root_path).string())
, m_mode(mode)
{
update();
}
GFileSystemModel::~GFileSystemModel()
{
}
void GFileSystemModel::update()
{
// FIXME: Support refreshing the model!
if (m_root)
return;
m_root = new Node;
m_root->name = m_root_path;
m_root->reify_if_needed(*this);
}
int GFileSystemModel::row_count(const GModelIndex& index) const
{
if (!index.is_valid())
return 1;
auto& node = *(Node*)index.internal_data();
node.reify_if_needed(*this);
if (node.type == Node::Type::Directory)
return node.children.size();
return 0;
}
GModelIndex GFileSystemModel::index(int row, int column, const GModelIndex& parent) const
{
if (!parent.is_valid())
return create_index(row, column, m_root);
auto& node = *(Node*)parent.internal_data();
return create_index(row, column, node.children[row]);
}
GModelIndex GFileSystemModel::parent_index(const GModelIndex& index) const
{
if (!index.is_valid())
return { };
auto& node = *(const Node*)index.internal_data();
if (!node.parent) {
ASSERT(&node == m_root);
return { };
}
return node.parent->index(*this);
}
GVariant GFileSystemModel::data(const GModelIndex& index, Role role) const
{
if (!index.is_valid())
return { };
auto& node = *(const Node*)index.internal_data();
if (role == GModel::Role::Display)
return node.name;
if (role == GModel::Role::Icon) {
if (node.type == Node::Directory) {
if (selected_index() == index)
return GIcon::default_icon("filetype-folder-open");
return GIcon::default_icon("filetype-folder");
}
return GIcon::default_icon("filetype-unknown");
}
return { };
}
void GFileSystemModel::activate(const GModelIndex&)
{
}
int GFileSystemModel::column_count(const GModelIndex&) const
{
return 1;
}
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