mirror of
https://github.com/RGBCube/serenity
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7604c2f38e
To improve the performance of the DOM Inspector when the Browser is run in multi-process mode, do not create copies of the JSON values sent via IPC when searching for a model index. Methods that are guaranteed to return a value now return a reference. Methods that do not have such a guarantee return a pointer (rather than an Optional, because Optional cannot hold references). The DOM Inspector performs well at first, but will start lagging again once the tree is expanded a few nodes deep and/or with many nodes visible in the tree.
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2018-2020, Adam Hodgen <ant1441@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/JsonObject.h>
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#include <LibGUI/Model.h>
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#include <LibWeb/Forward.h>
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namespace Web {
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class DOMTreeJSONModel final : public GUI::Model {
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public:
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static NonnullRefPtr<DOMTreeJSONModel> create(StringView dom_tree)
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{
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auto json_or_error = JsonValue::from_string(dom_tree);
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if (!json_or_error.has_value())
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VERIFY_NOT_REACHED();
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return adopt_ref(*new DOMTreeJSONModel(json_or_error.value().as_object()));
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}
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virtual ~DOMTreeJSONModel() override;
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virtual int row_count(const GUI::ModelIndex& = GUI::ModelIndex()) const override;
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virtual int column_count(const GUI::ModelIndex& = GUI::ModelIndex()) const override;
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virtual GUI::Variant data(const GUI::ModelIndex&, GUI::ModelRole) const override;
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virtual GUI::ModelIndex index(int row, int column, const GUI::ModelIndex& parent = GUI::ModelIndex()) const override;
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virtual GUI::ModelIndex parent_index(const GUI::ModelIndex&) const override;
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virtual void update() override;
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private:
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explicit DOMTreeJSONModel(JsonObject);
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JsonObject const* find_parent_of_child_with_internal_id(size_t) const;
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JsonObject const* find_parent_of_child_with_internal_id(JsonObject const&, size_t) const;
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JsonObject const* find_child_with_internal_id(size_t) const;
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JsonObject const* find_child_with_internal_id(JsonObject const&, size_t) const;
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JsonObject const& find_node(GUI::ModelIndex const&) const;
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static size_t get_internal_id(const JsonObject& o);
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static JsonArray const* get_children(const JsonObject& o);
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GUI::Icon m_document_icon;
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GUI::Icon m_element_icon;
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GUI::Icon m_text_icon;
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JsonObject m_dom_tree;
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};
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}
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