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Ladybird+LibWeb+WebContent: Parse the <input type=file> accept attribute

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This parses the accept attribute value for file input types and passes
it along to the browser chromes.
This commit is contained in:
Timothy Flynn 2024-03-14 12:26:00 -04:00 • committed by Andreas Kling
parent e4213f5767
commit 6760d236e4
20 changed files with 267 additions and 24 deletions
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1
Userland/Libraries/LibWeb/CMakeLists.txt
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@ -268,6 +268,7 @@ set(SOURCES
HTML/EventLoop/Task.cpp
HTML/EventLoop/TaskQueue.cpp
HTML/EventNames.cpp
HTML/FileFilter.cpp
HTML/Focus.cpp
HTML/FormAssociatedElement.cpp
HTML/FormControlInfrastructure.cpp

61
Userland/Libraries/LibWeb/HTML/FileFilter.cpp Normal file
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@ -0,0 +1,61 @@
/*
* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibIPC/Decoder.h>
#include <LibIPC/Encoder.h>
#include <LibWeb/HTML/FileFilter.h>
namespace Web::HTML {
void FileFilter::add_filter(FilterType filter)
{
if (!filters.contains_slow(filter))
filters.append(move(filter));
}
}
template<>
ErrorOr<void> IPC::encode(Encoder& encoder, Web::HTML::FileFilter::MimeType const& mime_type)
{
TRY(encoder.encode(mime_type.value));
return {};
}
template<>
ErrorOr<Web::HTML::FileFilter::MimeType> IPC::decode(Decoder& decoder)
{
auto value = TRY(decoder.decode<String>());
return Web::HTML::FileFilter::MimeType { move(value) };
}
template<>
ErrorOr<void> IPC::encode(Encoder& encoder, Web::HTML::FileFilter::Extension const& extension)
{
TRY(encoder.encode(extension.value));
return {};
}
template<>
ErrorOr<Web::HTML::FileFilter::Extension> IPC::decode(Decoder& decoder)
{
auto value = TRY(decoder.decode<String>());
return Web::HTML::FileFilter::Extension { move(value) };
}
template<>
ErrorOr<void> IPC::encode(Encoder& encoder, Web::HTML::FileFilter const& filter)
{
TRY(encoder.encode(filter.filters));
return {};
}
template<>
ErrorOr<Web::HTML::FileFilter> IPC::decode(Decoder& decoder)
{
auto filters = TRY(decoder.decode<Vector<Web::HTML::FileFilter::FilterType>>());
return Web::HTML::FileFilter { move(filters) };
}

62
Userland/Libraries/LibWeb/HTML/FileFilter.h Normal file
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@ -0,0 +1,62 @@
/*
* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/String.h>
#include <AK/Variant.h>
#include <AK/Vector.h>
#include <LibIPC/Forward.h>
namespace Web::HTML {
struct FileFilter {
enum class FileType {
Audio,
Image,
Video,
};
struct MimeType {
bool operator==(MimeType const&) const = default;
String value;
};
struct Extension {
bool operator==(Extension const&) const = default;
String value;
};
using FilterType = Variant<FileType, MimeType, Extension>;
void add_filter(FilterType);
Vector<FilterType> filters;
};
}
namespace IPC {
template<>
ErrorOr<void> encode(Encoder&, Web::HTML::FileFilter::MimeType const&);
template<>
ErrorOr<Web::HTML::FileFilter::MimeType> decode(Decoder&);
template<>
ErrorOr<void> encode(Encoder&, Web::HTML::FileFilter::Extension const&);
template<>
ErrorOr<Web::HTML::FileFilter::Extension> decode(Decoder&);
template<>
ErrorOr<void> encode(Encoder&, Web::HTML::FileFilter const&);
template<>
ErrorOr<Web::HTML::FileFilter> decode(Decoder&);
}

43
Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp
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@ -39,6 +39,7 @@
#include <LibWeb/Layout/CheckBox.h>
#include <LibWeb/Layout/ImageBox.h>
#include <LibWeb/Layout/RadioButton.h>
#include <LibWeb/MimeSniff/MimeType.h>
#include <LibWeb/MimeSniff/Resource.h>
#include <LibWeb/Namespace.h>
#include <LibWeb/Page/Page.h>
@ -181,6 +182,43 @@ void HTMLInputElement::set_files(JS::GCPtr<FileAPI::FileList> files)
m_selected_files = files;
}
// https://html.spec.whatwg.org/multipage/input.html#attr-input-accept
FileFilter HTMLInputElement::parse_accept_attribute() const
{
FileFilter filter;
// If specified, the attribute must consist of a set of comma-separated tokens, each of which must be an ASCII
// case-insensitive match for one of the following:
get_attribute_value(HTML::AttributeNames::accept).bytes_as_string_view().for_each_split_view(',', SplitBehavior::Nothing, [&](StringView value) {
// The string "audio/*"
// Indicates that sound files are accepted.
if (value.equals_ignoring_ascii_case("audio/*"sv))
filter.add_filter(FileFilter::FileType::Audio);
// The string "video/*"
// Indicates that video files are accepted.
if (value.equals_ignoring_ascii_case("video/*"sv))
filter.add_filter(FileFilter::FileType::Video);
// The string "image/*"
// Indicates that image files are accepted.
if (value.equals_ignoring_ascii_case("image/*"sv))
filter.add_filter(FileFilter::FileType::Image);
// A valid MIME type string with no parameters
// Indicates that files of the specified type are accepted.
else if (auto mime_type = MUST(MimeSniff::MimeType::parse(value)); mime_type.has_value() && mime_type->parameters().is_empty())
filter.add_filter(FileFilter::MimeType { mime_type->essence() });
// A string whose first character is a U+002E FULL STOP character (.)
// Indicates that files with the specified file extension are accepted.
else if (value.starts_with('.'))
filter.add_filter(FileFilter::Extension { MUST(String::from_utf8(value.substring_view(1))) });
});
return filter;
}
// https://html.spec.whatwg.org/multipage/input.html#update-the-file-selection
void HTMLInputElement::update_the_file_selection(JS::NonnullGCPtr<FileAPI::FileList> files)
{
@ -227,12 +265,11 @@ static void show_the_picker_if_applicable(HTMLInputElement& element)
// with the bubbles attribute initialized to true.
// 5. Otherwise, update the file selection for element.
auto accepted_file_types = element.parse_accept_attribute();
auto allow_multiple_files = element.has_attribute(HTML::AttributeNames::multiple) ? AllowMultipleFiles::Yes : AllowMultipleFiles::No;
auto weak_element = element.make_weak_ptr<HTMLInputElement>();
// FIXME: Pass along accept attribute information https://html.spec.whatwg.org/multipage/input.html#attr-input-accept
// The accept attribute may be specified to provide user agents with a hint of what file types will be accepted.
element.document().browsing_context()->top_level_browsing_context()->page().did_request_file_picker(weak_element, allow_multiple_files);
element.document().browsing_context()->top_level_browsing_context()->page().did_request_file_picker(weak_element, move(accepted_file_types), allow_multiple_files);
return;
}

3
Userland/Libraries/LibWeb/HTML/HTMLInputElement.h
View file

@ -12,6 +12,7 @@
#include <LibWeb/DOM/Text.h>
#include <LibWeb/FileAPI/FileList.h>
#include <LibWeb/HTML/ColorPickerUpdateState.h>
#include <LibWeb/HTML/FileFilter.h>
#include <LibWeb/HTML/FormAssociatedElement.h>
#include <LibWeb/HTML/HTMLElement.h>
#include <LibWeb/Layout/ImageProvider.h>
@ -102,6 +103,8 @@ public:
JS::GCPtr<FileAPI::FileList> files();
void set_files(JS::GCPtr<FileAPI::FileList>);
FileFilter parse_accept_attribute() const;
// NOTE: User interaction
// https://html.spec.whatwg.org/multipage/input.html#update-the-file-selection
void update_the_file_selection(JS::NonnullGCPtr<FileAPI::FileList>);

4
Userland/Libraries/LibWeb/Page/Page.cpp
View file

@ -344,13 +344,13 @@ void Page::color_picker_update(Optional<Color> picked_color, HTML::ColorPickerUp
}
}
void Page::did_request_file_picker(WeakPtr<HTML::HTMLInputElement> target, HTML::AllowMultipleFiles allow_multiple_files)
void Page::did_request_file_picker(WeakPtr<HTML::HTMLInputElement> target, HTML::FileFilter accepted_file_types, HTML::AllowMultipleFiles allow_multiple_files)
{
if (m_pending_non_blocking_dialog == PendingNonBlockingDialog::None) {
m_pending_non_blocking_dialog = PendingNonBlockingDialog::FilePicker;
m_pending_non_blocking_dialog_target = move(target);
m_client->page_did_request_file_picker(allow_multiple_files);
m_client->page_did_request_file_picker(move(accepted_file_types), allow_multiple_files);
}
}

5
Userland/Libraries/LibWeb/Page/Page.h
View file

@ -31,6 +31,7 @@
#include <LibWeb/Forward.h>
#include <LibWeb/HTML/ActivateTab.h>
#include <LibWeb/HTML/ColorPickerUpdateState.h>
#include <LibWeb/HTML/FileFilter.h>
#include <LibWeb/HTML/SelectItem.h>
#include <LibWeb/HTML/TokenizedFeatures.h>
#include <LibWeb/HTML/WebViewHints.h>
@ -134,7 +135,7 @@ public:
void did_request_color_picker(WeakPtr<HTML::HTMLInputElement> target, Color current_color);
void color_picker_update(Optional<Color> picked_color, HTML::ColorPickerUpdateState state);
void did_request_file_picker(WeakPtr<HTML::HTMLInputElement> target, HTML::AllowMultipleFiles);
void did_request_file_picker(WeakPtr<HTML::HTMLInputElement> target, HTML::FileFilter accepted_file_types, HTML::AllowMultipleFiles);
void file_picker_closed(Span<HTML::SelectedFile> selected_files);
void did_request_select_dropdown(WeakPtr<HTML::HTMLSelectElement> target, Web::CSSPixelPoint content_position, Web::CSSPixels minimum_width, Vector<Web::HTML::SelectItem> items);
@ -285,7 +286,7 @@ public:
// https://html.spec.whatwg.org/multipage/input.html#show-the-picker,-if-applicable
virtual void page_did_request_color_picker([[maybe_unused]] Color current_color) {};
virtual void page_did_request_file_picker(Web::HTML::AllowMultipleFiles) {};
virtual void page_did_request_file_picker([[maybe_unused]] HTML::FileFilter accepted_file_types, Web::HTML::AllowMultipleFiles) {};
virtual void page_did_request_select_dropdown([[maybe_unused]] Web::CSSPixelPoint content_position, [[maybe_unused]] Web::CSSPixels minimum_width, [[maybe_unused]] Vector<Web::HTML::SelectItem> items) {};
virtual void page_did_finish_text_test() {};