mirror of
https://github.com/LadybirdBrowser/ladybird.git
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206 lines
6 KiB
C++
206 lines
6 KiB
C++
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/*
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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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