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ImageViewer: Use LibFileSystemAccessClient

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This commit also starts the adoption of ErrorOr<T> and the String class
in ImageViewer. However, there is still a few more changes that could
be made.

Since the actions of using LibFSAC and using String in more places are
tightly coupled, I decided to put them in one commit.
This commit is contained in:
Caoimhe 2023-03-23 20:51:42 +00:00 • committed by Linus Groh
parent c943ab823d
commit 208e3f1978
4 changed files with 83 additions and 46 deletions
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67
Userland/Applications/ImageViewer/ViewWidget.cpp
View file

@ -4,6 +4,7 @@
* Copyright (c) 2021, Mohsan Ali <mohsan0073@gmail.com>
* Copyright (c) 2022, Mustafa Quraish <mustafa@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
* Copyright (c) 2023, Caoimhe Byrne <caoimhebyrne06@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -16,6 +17,7 @@
#include <LibCore/MappedFile.h>
#include <LibCore/MimeData.h>
#include <LibCore/Timer.h>
#include <LibFileSystemAccessClient/Client.h>
#include <LibGUI/Application.h>
#include <LibGUI/MessageBox.h>
#include <LibGfx/Bitmap.h>
@ -71,6 +73,13 @@ bool ViewWidget::is_previous_available() const
return false;
}
// FIXME: Convert to `String` & use LibFileSystemAccessClient + `Core::System::unveil(nullptr, nullptr)`
// - Converting to String is not super-trivial due to the LexicalPath usage, while we can do a bunch of
// String::from_deprecated_string() and String.to_deprecated_string(), it is quite ugly to read and
// probably not the best approach.
//
// - If we go full-unveil (`Core::System::unveil(nullptr, nullptr)`) this functionality does not work,
// we can not access the list of contents of a directory through LibFileSystemAccessClient at the moment.
Vector<DeprecatedString> ViewWidget::load_files_from_directory(DeprecatedString const& path) const
{
Vector<DeprecatedString> files_in_directory;
@ -86,11 +95,11 @@ Vector<DeprecatedString> ViewWidget::load_files_from_directory(DeprecatedString
return files_in_directory;
}
void ViewWidget::set_path(DeprecatedString const& path)
void ViewWidget::set_path(String const& path)
{
m_path = path;
m_files_in_same_dir = load_files_from_directory(path);
m_current_index = m_files_in_same_dir.find_first_index(path);
m_files_in_same_dir = load_files_from_directory(path.to_deprecated_string());
m_current_index = m_files_in_same_dir.find_first_index(path.to_deprecated_string());
}
void ViewWidget::navigate(Directions direction)
@ -110,8 +119,14 @@ void ViewWidget::navigate(Directions direction)
index = m_files_in_same_dir.size() - 1;
}
auto result = FileSystemAccessClient::Client::the().request_file_read_only_approved(window(), m_files_in_same_dir.at(index));
if (result.is_error())
return;
m_current_index = index;
this->load_from_file(m_files_in_same_dir.at(index));
auto value = result.release_value();
open_file(value.filename(), value.stream());
}
void ViewWidget::doubleclick_event(GUI::MouseEvent&)
@ -147,39 +162,34 @@ void ViewWidget::mouseup_event(GUI::MouseEvent& event)
GUI::AbstractZoomPanWidget::mouseup_event(event);
}
void ViewWidget::load_from_file(DeprecatedString const& path)
void ViewWidget::open_file(String const& path, Core::File& file)
{
auto show_error = [&] {
GUI::MessageBox::show(window(), DeprecatedString::formatted("Failed to open {}", path), "Cannot open image"sv, GUI::MessageBox::Type::Error);
};
auto open_result = try_open_file(path, file);
if (open_result.is_error()) {
auto error = open_result.release_error();
auto user_error_message = String::formatted("Failed to open the image: {}.", error).release_value_but_fixme_should_propagate_errors();
auto file_or_error = Core::MappedFile::map(path);
if (file_or_error.is_error()) {
show_error();
return;
GUI::MessageBox::show_error(nullptr, user_error_message);
}
}
auto& mapped_file = *file_or_error.value();
ErrorOr<void> ViewWidget::try_open_file(String const& path, Core::File& file)
{
// Spawn a new ImageDecoder service process and connect to it.
auto client = ImageDecoderClient::Client::try_create().release_value_but_fixme_should_propagate_errors();
auto client = TRY(ImageDecoderClient::Client::try_create());
auto mime_type = Core::guess_mime_type_based_on_filename(path);
auto decoded_image_or_error = client->decode_image(mapped_file.bytes(), mime_type);
if (!decoded_image_or_error.has_value()) {
show_error();
return;
auto decoded_image_or_none = client->decode_image(TRY(file.read_until_eof()), mime_type);
if (!decoded_image_or_none.has_value()) {
return Error::from_string_literal("Failed to decode image");
}
m_decoded_image = decoded_image_or_error.release_value();
m_decoded_image = decoded_image_or_none.release_value();
m_bitmap = m_decoded_image->frames[0].bitmap;
if (m_bitmap.is_null()) {
show_error();
return;
return Error::from_string_literal("Image didn't contain a bitmap");
}
set_original_rect(m_bitmap->rect());
if (on_image_change)
on_image_change(m_bitmap);
if (m_decoded_image->is_animated && m_decoded_image->frames.size() > 1) {
auto const& first_frame = m_decoded_image->frames[0];
@ -190,13 +200,18 @@ void ViewWidget::load_from_file(DeprecatedString const& path)
m_timer->stop();
}
m_path = Core::DeprecatedFile::real_path_for(path);
GUI::Application::the()->set_most_recently_open_file(String::from_utf8(path).release_value_but_fixme_should_propagate_errors());
set_path(path);
GUI::Application::the()->set_most_recently_open_file(path);
if (on_image_change)
on_image_change(m_bitmap);
if (scaled_for_first_image())
scale_image_for_window();
else
reset_view();
return {};
}
void ViewWidget::drag_enter_event(GUI::DragEvent& event)