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Libraries: Move to Userland/Libraries/

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Andreas Kling 2021-01-12 12:17:30 +01:00
parent dc28c07fa5
commit 13d7c09125
Notes: sideshowbarker 2024-07-18 23:53:55 +09:00
1857 changed files with 266 additions and 274 deletions
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Libraries/LibGUI/FileSystemModel.cpp
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@ -1,647 +0,0 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/LexicalPath.h>
#include <AK/QuickSort.h>
#include <AK/StringBuilder.h>
#include <LibCore/DirIterator.h>
#include <LibCore/File.h>
#include <LibCore/StandardPaths.h>
#include <LibGUI/FileIconProvider.h>
#include <LibGUI/FileSystemModel.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Bitmap.h>
#include <LibThread/BackgroundAction.h>
#include <dirent.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
namespace GUI {
ModelIndex FileSystemModel::Node::index(int column) const
{
if (!parent)
return {};
for (size_t row = 0; row < parent->children.size(); ++row) {
if (&parent->children[row] == this)
return m_model.create_index(row, column, const_cast<Node*>(this));
}
ASSERT_NOT_REACHED();
}
bool FileSystemModel::Node::fetch_data(const String& full_path, bool is_root)
{
struct stat st;
int rc;
if (is_root)
rc = stat(full_path.characters(), &st);
else
rc = lstat(full_path.characters(), &st);
if (rc < 0) {
m_error = errno;
perror("stat/lstat");
return false;
}
size = st.st_size;
mode = st.st_mode;
uid = st.st_uid;
gid = st.st_gid;
inode = st.st_ino;
mtime = st.st_mtime;
if (S_ISLNK(mode)) {
symlink_target = Core::File::read_link(full_path);
if (symlink_target.is_null())
perror("readlink");
}
if (S_ISDIR(mode)) {
is_accessible_directory = access(full_path.characters(), R_OK | X_OK) == 0;
}
return true;
}
void FileSystemModel::Node::traverse_if_needed()
{
if (!is_directory() || has_traversed)
return;
has_traversed = true;
if (m_parent_of_root) {
auto root = adopt_own(*new Node(m_model));
root->fetch_data("/", true);
root->name = "/";
root->parent = this;
children.append(move(root));
return;
}
total_size = 0;
auto full_path = this->full_path();
Core::DirIterator di(full_path, m_model.should_show_dotfiles() ? Core::DirIterator::SkipParentAndBaseDir : Core::DirIterator::SkipDots);
if (di.has_error()) {
m_error = di.error();
fprintf(stderr, "DirIterator: %s\n", di.error_string());
return;
}
Vector<String> child_names;
while (di.has_next()) {
child_names.append(di.next_path());
}
quick_sort(child_names);
for (auto& name : child_names) {
String child_path = String::formatted("{}/{}", full_path, name);
auto child = adopt_own(*new Node(m_model));
bool ok = child->fetch_data(child_path, false);
if (!ok)
continue;
if (m_model.m_mode == DirectoriesOnly && !S_ISDIR(child->mode))
continue;
child->name = name;
child->parent = this;
total_size += child->size;
children.append(move(child));
}
if (m_watch_fd >= 0)
return;
m_watch_fd = watch_file(full_path.characters(), full_path.length());
if (m_watch_fd < 0) {
perror("watch_file");
return;
}
fcntl(m_watch_fd, F_SETFD, FD_CLOEXEC);
dbgln("Watching {} for changes, m_watch_fd={}", full_path, m_watch_fd);
m_notifier = Core::Notifier::construct(m_watch_fd, Core::Notifier::Event::Read);
m_notifier->on_ready_to_read = [this] {
char buffer[32];
int rc = read(m_notifier->fd(), buffer, sizeof(buffer));
ASSERT(rc >= 0);
has_traversed = false;
mode = 0;
children.clear();
reify_if_needed();
m_model.did_update();
};
}
void FileSystemModel::Node::reify_if_needed()
{
traverse_if_needed();
if (mode != 0)
return;
fetch_data(full_path(), parent == nullptr || parent->m_parent_of_root);
}
String FileSystemModel::Node::full_path() const
{
Vector<String, 32> lineage;
for (auto* ancestor = parent; ancestor; ancestor = ancestor->parent) {
lineage.append(ancestor->name);
}
StringBuilder builder;
builder.append(m_model.root_path());
for (int i = lineage.size() - 1; i >= 0; --i) {
builder.append('/');
builder.append(lineage[i]);
}
builder.append('/');
builder.append(name);
return LexicalPath::canonicalized_path(builder.to_string());
}
ModelIndex FileSystemModel::index(const StringView& path, int column) const
{
LexicalPath lexical_path(path);
const Node* node = m_root->m_parent_of_root ? &m_root->children.first() : m_root;
if (lexical_path.string() == "/")
return node->index(column);
for (size_t i = 0; i < lexical_path.parts().size(); ++i) {
auto& part = lexical_path.parts()[i];
bool found = false;
for (auto& child : node->children) {
if (child.name == part) {
const_cast<Node&>(child).reify_if_needed();
node = &child;
found = true;
if (i == lexical_path.parts().size() - 1)
return child.index(column);
break;
}
}
if (!found)
return {};
}
return {};
}
String FileSystemModel::full_path(const ModelIndex& index) const
{
auto& node = this->node(index);
const_cast<Node&>(node).reify_if_needed();
return node.full_path();
}
FileSystemModel::FileSystemModel(const StringView& root_path, Mode mode)
: m_root_path(LexicalPath::canonicalized_path(root_path))
, m_mode(mode)
{
setpwent();
while (auto* passwd = getpwent())
m_user_names.set(passwd->pw_uid, passwd->pw_name);
endpwent();
setgrent();
while (auto* group = getgrent())
m_group_names.set(group->gr_gid, group->gr_name);
endgrent();
update();
}
FileSystemModel::~FileSystemModel()
{
}
String FileSystemModel::name_for_uid(uid_t uid) const
{
auto it = m_user_names.find(uid);
if (it == m_user_names.end())
return String::number(uid);
return (*it).value;
}
String FileSystemModel::name_for_gid(gid_t gid) const
{
auto it = m_group_names.find(gid);
if (it == m_group_names.end())
return String::number(gid);
return (*it).value;
}
static String permission_string(mode_t mode)
{
StringBuilder builder;
if (S_ISDIR(mode))
builder.append("d");
else if (S_ISLNK(mode))
builder.append("l");
else if (S_ISBLK(mode))
builder.append("b");
else if (S_ISCHR(mode))
builder.append("c");
else if (S_ISFIFO(mode))
builder.append("f");
else if (S_ISSOCK(mode))
builder.append("s");
else if (S_ISREG(mode))
builder.append("-");
else
builder.append("?");
builder.appendf("%c%c%c%c%c%c%c%c",
mode & S_IRUSR ? 'r' : '-',
mode & S_IWUSR ? 'w' : '-',
mode & S_ISUID ? 's' : (mode & S_IXUSR ? 'x' : '-'),
mode & S_IRGRP ? 'r' : '-',
mode & S_IWGRP ? 'w' : '-',
mode & S_ISGID ? 's' : (mode & S_IXGRP ? 'x' : '-'),
mode & S_IROTH ? 'r' : '-',
mode & S_IWOTH ? 'w' : '-');
if (mode & S_ISVTX)
builder.append("t");
else
builder.appendf("%c", mode & S_IXOTH ? 'x' : '-');
return builder.to_string();
}
void FileSystemModel::Node::set_selected(bool selected)
{
if (m_selected == selected)
return;
m_selected = selected;
}
void FileSystemModel::update_node_on_selection(const ModelIndex& index, const bool selected)
{
Node& node = const_cast<Node&>(this->node(index));
node.set_selected(selected);
}
void FileSystemModel::set_root_path(const StringView& root_path)
{
if (root_path.is_null())
m_root_path = {};
else
m_root_path = LexicalPath::canonicalized_path(root_path);
update();
if (m_root->has_error()) {
if (on_error)
on_error(m_root->error(), m_root->error_string());
} else if (on_complete) {
on_complete();
}
}
void FileSystemModel::update()
{
m_root = adopt_own(*new Node(*this));
if (m_root_path.is_null())
m_root->m_parent_of_root = true;
m_root->reify_if_needed();
did_update();
}
int FileSystemModel::row_count(const ModelIndex& index) const
{
Node& node = const_cast<Node&>(this->node(index));
node.reify_if_needed();
if (node.is_directory())
return node.children.size();
return 0;
}
const FileSystemModel::Node& FileSystemModel::node(const ModelIndex& index) const
{
if (!index.is_valid())
return *m_root;
ASSERT(index.internal_data());
return *(Node*)index.internal_data();
}
ModelIndex FileSystemModel::index(int row, int column, const ModelIndex& parent) const
{
if (row < 0 || column < 0)
return {};
auto& node = this->node(parent);
const_cast<Node&>(node).reify_if_needed();
if (static_cast<size_t>(row) >= node.children.size())
return {};
return create_index(row, column, &node.children[row]);
}
ModelIndex FileSystemModel::parent_index(const ModelIndex& index) const
{
if (!index.is_valid())
return {};
auto& node = this->node(index);
if (!node.parent) {
ASSERT(&node == m_root);
return {};
}
return node.parent->index(index.column());
}
Variant FileSystemModel::data(const ModelIndex& index, ModelRole role) const
{
ASSERT(index.is_valid());
if (role == ModelRole::TextAlignment) {
switch (index.column()) {
case Column::Icon:
return Gfx::TextAlignment::Center;
case Column::Size:
case Column::Inode:
return Gfx::TextAlignment::CenterRight;
case Column::Name:
case Column::Owner:
case Column::Group:
case Column::ModificationTime:
case Column::Permissions:
case Column::SymlinkTarget:
return Gfx::TextAlignment::CenterLeft;
default:
ASSERT_NOT_REACHED();
}
}
auto& node = this->node(index);
if (role == ModelRole::Custom) {
// For GUI::FileSystemModel, custom role means the full path.
ASSERT(index.column() == Column::Name);
return node.full_path();
}
if (role == ModelRole::MimeData) {
if (index.column() == Column::Name) {
StringBuilder builder;
builder.append("file://");
builder.append(node.full_path());
return builder.to_string();
}
return {};
}
if (role == ModelRole::Sort) {
switch (index.column()) {
case Column::Icon:
return node.is_directory() ? 0 : 1;
case Column::Name:
return node.name;
case Column::Size:
return (int)node.size;
case Column::Owner:
return name_for_uid(node.uid);
case Column::Group:
return name_for_gid(node.gid);
case Column::Permissions:
return permission_string(node.mode);
case Column::ModificationTime:
return node.mtime;
case Column::Inode:
return (int)node.inode;
case Column::SymlinkTarget:
return node.symlink_target;
}
ASSERT_NOT_REACHED();
}
if (role == ModelRole::Display) {
switch (index.column()) {
case Column::Icon:
return icon_for(node);
case Column::Name:
return node.name;
case Column::Size:
return (int)node.size;
case Column::Owner:
return name_for_uid(node.uid);
case Column::Group:
return name_for_gid(node.gid);
case Column::Permissions:
return permission_string(node.mode);
case Column::ModificationTime:
return timestamp_string(node.mtime);
case Column::Inode:
return (int)node.inode;
case Column::SymlinkTarget:
return node.symlink_target;
}
}
if (role == ModelRole::Icon) {
return icon_for(node);
}
return {};
}
Icon FileSystemModel::icon_for(const Node& node) const
{
if (node.full_path() == "/")
return FileIconProvider::icon_for_path("/");
if (Gfx::Bitmap::is_path_a_supported_image_format(node.name)) {
if (!node.thumbnail) {
if (!const_cast<FileSystemModel*>(this)->fetch_thumbnail_for(node))
return FileIconProvider::filetype_image_icon();
}
return GUI::Icon(FileIconProvider::filetype_image_icon().bitmap_for_size(16), *node.thumbnail);
}
if (node.is_directory()) {
if (node.full_path() == Core::StandardPaths::home_directory()) {
if (node.is_selected())
return FileIconProvider::home_directory_open_icon();
return FileIconProvider::home_directory_icon();
}
if (node.is_selected() && node.is_accessible_directory)
return FileIconProvider::directory_open_icon();
}
return FileIconProvider::icon_for_path(node.full_path(), node.mode);
}
static HashMap<String, RefPtr<Gfx::Bitmap>> s_thumbnail_cache;
static RefPtr<Gfx::Bitmap> render_thumbnail(const StringView& path)
{
auto png_bitmap = Gfx::Bitmap::load_from_file(path);
if (!png_bitmap)
return nullptr;
double scale = min(32 / (double)png_bitmap->width(), 32 / (double)png_bitmap->height());
auto thumbnail = Gfx::Bitmap::create(png_bitmap->format(), { 32, 32 });
Gfx::IntRect destination = Gfx::IntRect(0, 0, (int)(png_bitmap->width() * scale), (int)(png_bitmap->height() * scale));
destination.center_within(thumbnail->rect());
Painter painter(*thumbnail);
painter.draw_scaled_bitmap(destination, *png_bitmap, png_bitmap->rect());
return thumbnail;
}
bool FileSystemModel::fetch_thumbnail_for(const Node& node)
{
// See if we already have the thumbnail
// we're looking for in the cache.
auto path = node.full_path();
auto it = s_thumbnail_cache.find(path);
if (it != s_thumbnail_cache.end()) {
if (!(*it).value)
return false;
node.thumbnail = (*it).value;
return true;
}
// Otherwise, arrange to render the thumbnail
// in background and make it available later.
s_thumbnail_cache.set(path, nullptr);
m_thumbnail_progress_total++;
auto weak_this = make_weak_ptr();
LibThread::BackgroundAction<RefPtr<Gfx::Bitmap>>::create(
[path] {
return render_thumbnail(path);
},
[this, path, weak_this](auto thumbnail) {
s_thumbnail_cache.set(path, move(thumbnail));
// The model was destroyed, no need to update
// progress or call any event handlers.
if (weak_this.is_null())
return;
m_thumbnail_progress++;
if (on_thumbnail_progress)
on_thumbnail_progress(m_thumbnail_progress, m_thumbnail_progress_total);
if (m_thumbnail_progress == m_thumbnail_progress_total) {
m_thumbnail_progress = 0;
m_thumbnail_progress_total = 0;
}
did_update();
});
return false;
}
int FileSystemModel::column_count(const ModelIndex&) const
{
return Column::__Count;
}
String FileSystemModel::column_name(int column) const
{
switch (column) {
case Column::Icon:
return "";
case Column::Name:
return "Name";
case Column::Size:
return "Size";
case Column::Owner:
return "Owner";
case Column::Group:
return "Group";
case Column::Permissions:
return "Mode";
case Column::ModificationTime:
return "Modified";
case Column::Inode:
return "Inode";
case Column::SymlinkTarget:
return "Symlink target";
}
ASSERT_NOT_REACHED();
}
bool FileSystemModel::accepts_drag(const ModelIndex& index, const Vector<String>& mime_types) const
{
if (!index.is_valid())
return false;
if (!mime_types.contains_slow("text/uri-list"))
return false;
auto& node = this->node(index);
return node.is_directory();
}
void FileSystemModel::set_should_show_dotfiles(bool show)
{
if (m_should_show_dotfiles == show)
return;
m_should_show_dotfiles = show;
update();
}
bool FileSystemModel::is_editable(const ModelIndex& index) const
{
if (!index.is_valid())
return false;
return index.column() == Column::Name;
}
void FileSystemModel::set_data(const ModelIndex& index, const Variant& data)
{
ASSERT(is_editable(index));
Node& node = const_cast<Node&>(this->node(index));
auto dirname = LexicalPath(node.full_path()).dirname();
auto new_full_path = String::formatted("{}/{}", dirname, data.to_string());
int rc = rename(node.full_path().characters(), new_full_path.characters());
if (rc < 0) {
if (on_error)
on_error(errno, strerror(errno));
}
}
Vector<ModelIndex, 1> FileSystemModel::matches(const StringView& searching, unsigned flags, const ModelIndex& index)
{
Node& node = const_cast<Node&>(this->node(index));
node.reify_if_needed();
Vector<ModelIndex, 1> found_indexes;
for (auto& child : node.children) {
if (string_matches(child.name, searching, flags)) {
const_cast<Node&>(child).reify_if_needed();
found_indexes.append(child.index(Column::Name));
if (flags & FirstMatchOnly)
break;
}
}
return found_indexes;
}
}