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LibWeb: Implement document.execCommand("delete")

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To facilitate the implementation of "delete" and all associated
algorithms, split off this piece of `Document` into a separate
directory.

This sets up the infrastructure for arbitrary commands to be supported.
This commit is contained in:
Jelle Raaijmakers 2024-11-27 11:57:12 +01:00 • committed by Andreas Kling
commit 7bb865052a
Notes: github-actions[bot] 2024-11-30 16:37:23 +00:00
12 changed files with 2227 additions and 48 deletions
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58
Libraries/LibWeb/Editing/Internal/Algorithms.h Normal file
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/*
* Copyright (c) 2024, Jelle Raaijmakers <jelle@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Vector.h>
#include <LibWeb/DOM/Node.h>
namespace Web::Editing {
// https://w3c.github.io/editing/docs/execCommand/#record-the-values
struct RecordedNodeValue {
GC::Ref<DOM::Node> node;
FlyString const& command;
Optional<String> specified_command_value;
};
// Below algorithms are specified here:
// https://w3c.github.io/editing/docs/execCommand/#assorted-common-algorithms
String canonical_space_sequence(u32 length, bool non_breaking_start, bool non_breaking_end);
void canonicalize_whitespace(GC::Ref<DOM::Node>, u32 offset, bool fix_collapsed_space = true);
void delete_the_selection(Selection::Selection const&);
GC::Ptr<DOM::Node> editing_host_of_node(GC::Ref<DOM::Node>);
bool follows_a_line_break(GC::Ref<DOM::Node>);
bool is_allowed_child_of_node(Variant<GC::Ref<DOM::Node>, FlyString> child, Variant<GC::Ref<DOM::Node>, FlyString> parent);
bool is_block_boundary_point(GC::Ref<DOM::Node>, u32 offset);
bool is_block_end_point(GC::Ref<DOM::Node>, u32 offset);
bool is_block_node(GC::Ref<DOM::Node>);
bool is_block_start_point(GC::Ref<DOM::Node>, u32 offset);
bool is_collapsed_whitespace_node(GC::Ref<DOM::Node>);
bool is_editing_host(GC::Ref<DOM::Node>);
bool is_element_with_inline_contents(GC::Ref<DOM::Node>);
bool is_extraneous_line_break(GC::Ref<DOM::Node>);
bool is_in_same_editing_host(GC::Ref<DOM::Node>, GC::Ref<DOM::Node>);
bool is_inline_node(GC::Ref<DOM::Node>);
bool is_invisible_node(GC::Ref<DOM::Node>);
bool is_name_of_an_element_with_inline_contents(FlyString const&);
bool is_prohibited_paragraph_child_name(FlyString const&);
bool is_visible_node(GC::Ref<DOM::Node>);
bool is_whitespace_node(GC::Ref<DOM::Node>);
void move_node_preserving_ranges(GC::Ref<DOM::Node>, GC::Ref<DOM::Node> new_parent, u32 new_index);
void normalize_sublists_in_node(GC::Ref<DOM::Element>);
bool precedes_a_line_break(GC::Ref<DOM::Node>);
Vector<RecordedNodeValue> record_the_values_of_nodes(Vector<GC::Ref<DOM::Node>> const&);
void remove_extraneous_line_breaks_at_the_end_of_node(GC::Ref<DOM::Node>);
void remove_extraneous_line_breaks_before_node(GC::Ref<DOM::Node>);
void remove_extraneous_line_breaks_from_a_node(GC::Ref<DOM::Node>);
void remove_node_preserving_its_descendants(GC::Ref<DOM::Node>);
void restore_the_values_of_nodes(Vector<RecordedNodeValue> const&);
GC::Ref<DOM::Element> set_the_tag_name(GC::Ref<DOM::Element>, FlyString const&);
Optional<String> specified_command_value(GC::Ref<DOM::Element>, FlyString const& command);
void split_the_parent_of_nodes(Vector<GC::Ref<DOM::Node>> const&);
}