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https://github.com/LadybirdBrowser/ladybird.git
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bf59e06d2a
This creates WebView::ConsoleClient to handle functionality that will be common to the JS consoles of all Ladybird chromes. This will let each chrome focus on just the UI. Note that this includes the `console.group` functionality that only the Serenity chrome previously had. This was a FIXME in the Qt chrome, and it is implemented such that all chromes will receive this functionality for free.
205 lines
6 KiB
C++
205 lines
6 KiB
C++
/*
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* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/StringBuilder.h>
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#include <LibJS/MarkupGenerator.h>
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#include <LibWebView/ConsoleClient.h>
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#include <LibWebView/ViewImplementation.h>
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namespace WebView {
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static constexpr auto CONSOLE_HTML = "data:text/html,<html style=\"font: 10pt monospace;\"></html>"sv;
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// FIXME: It should be sufficient to scrollTo a y value of document.documentElement.offsetHeight,
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// but due to an unknown bug offsetHeight seems to not be properly updated after spamming
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// a lot of document changes.
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//
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// The setTimeout makes the scrollTo async and allows the DOM to be updated.
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static constexpr auto SCROLL_TO_BOTTOM = "setTimeout(function() { window.scrollTo(0, 1_000_000_000); }, 0);"sv;
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ConsoleClient::ConsoleClient(ViewImplementation& content_web_view, ViewImplementation& console_web_view)
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: m_content_web_view(content_web_view)
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, m_console_web_view(console_web_view)
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{
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m_content_web_view.on_received_console_message = [this](auto message_index) {
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handle_console_message(message_index);
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};
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m_content_web_view.on_received_console_messages = [this](auto start_index, auto const& message_types, auto const& messages) {
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handle_console_messages(start_index, message_types, messages);
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};
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// Wait until our output WebView is loaded, and then request any messages that occurred before we existed.
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m_console_web_view.on_load_finish = [this](auto const&) {
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request_console_messages(0);
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};
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m_console_web_view.use_native_user_style_sheet();
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m_console_web_view.load(CONSOLE_HTML);
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}
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ConsoleClient::~ConsoleClient()
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{
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m_content_web_view.on_received_console_message = nullptr;
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m_content_web_view.on_received_console_messages = nullptr;
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}
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void ConsoleClient::execute(StringView script)
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{
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print_source(script);
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m_content_web_view.js_console_input(script);
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}
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void ConsoleClient::clear()
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{
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m_console_web_view.js_console_input("document.body.innerHTML = \"\";"sv);
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m_group_stack.clear();
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}
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void ConsoleClient::reset()
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{
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clear();
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m_highest_notified_message_index = -1;
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m_highest_received_message_index = -1;
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m_waiting_for_messages = false;
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}
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void ConsoleClient::handle_console_message(i32 message_index)
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{
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if (message_index <= m_highest_received_message_index) {
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dbgln("Notified about console message we already have");
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return;
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}
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if (message_index <= m_highest_notified_message_index) {
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dbgln("Notified about console message we're already aware of");
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return;
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}
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m_highest_notified_message_index = message_index;
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if (!m_waiting_for_messages)
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request_console_messages();
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}
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void ConsoleClient::handle_console_messages(i32 start_index, ReadonlySpan<DeprecatedString> message_types, ReadonlySpan<DeprecatedString> messages)
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{
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auto end_index = start_index + static_cast<i32>(message_types.size()) - 1;
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if (end_index <= m_highest_received_message_index) {
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dbgln("Received old console messages");
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return;
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}
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for (size_t i = 0; i < message_types.size(); ++i) {
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auto const& type = message_types[i];
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auto const& message = messages[i];
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if (type == "html"sv)
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print_html(message);
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else if (type == "clear"sv)
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clear();
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else if (type == "group"sv)
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begin_group(message, true);
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else if (type == "groupCollapsed"sv)
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begin_group(message, false);
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else if (type == "groupEnd"sv)
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end_group();
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else
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VERIFY_NOT_REACHED();
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}
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m_highest_received_message_index = end_index;
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m_waiting_for_messages = false;
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if (m_highest_received_message_index < m_highest_notified_message_index)
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request_console_messages();
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}
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void ConsoleClient::print_source(StringView source)
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{
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StringBuilder builder;
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builder.append("<span class=\"repl-indicator\">> </span>"sv);
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builder.append(MUST(JS::MarkupGenerator::html_from_source(source)));
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print_html(builder.string_view());
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}
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void ConsoleClient::print_html(StringView html)
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{
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StringBuilder builder;
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if (m_group_stack.is_empty())
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builder.append("var parentGroup = document.body;"sv);
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else
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builder.appendff("var parentGroup = document.getElementById(\"group_{}\");", m_group_stack.last().id);
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builder.append(R"~~~(
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var p = document.createElement("p");
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p.innerHTML = ")~~~"sv);
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builder.append_escaped_for_json(html);
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builder.append(R"~~~("
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parentGroup.appendChild(p);
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)~~~"sv);
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builder.append(SCROLL_TO_BOTTOM);
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m_console_web_view.run_javascript(builder.string_view());
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}
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void ConsoleClient::request_console_messages()
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{
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request_console_messages(m_highest_received_message_index + 1);
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}
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void ConsoleClient::request_console_messages(i32 start_index)
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{
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VERIFY(!m_waiting_for_messages);
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m_content_web_view.js_console_request_messages(start_index);
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m_waiting_for_messages = true;
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}
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void ConsoleClient::begin_group(StringView label, bool start_expanded)
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{
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StringBuilder builder;
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if (m_group_stack.is_empty())
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builder.append("var parentGroup = document.body;"sv);
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else
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builder.appendff("var parentGroup = document.getElementById(\"group_{}\");", m_group_stack.last().id);
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Group group;
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group.id = m_next_group_id++;
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group.label = label;
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builder.appendff(R"~~~(
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var group = document.createElement("details");
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group.id = "group_{}";
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var label = document.createElement("summary");
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label.innerHTML = ")~~~",
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group.id);
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builder.append_escaped_for_json(label);
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builder.append(R"~~~(";
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group.appendChild(label);
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parentGroup.appendChild(group);
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)~~~"sv);
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if (start_expanded)
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builder.append("group.open = true;"sv);
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builder.append(SCROLL_TO_BOTTOM);
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m_console_web_view.run_javascript(builder.string_view());
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m_group_stack.append(group);
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}
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void ConsoleClient::end_group()
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{
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m_group_stack.take_last();
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}
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}
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