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Ladybird: Implement the JavaScript console using a WebContentView

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This aligns the Ladybird console implementation with the Browser console
a bit more, which uses OutOfProcessWebView for rendering console output.
This allows us to style the console output to try and match the system
theme.

Using a WebContentView is simpler than trying to style the old QTextEdit
widget, as the console output is HTML with built-in "-libweb-palette-*"
colors. These will override any color we set on the QTextEdit widget.
This commit is contained in:
Timothy Flynn 2023-04-22 21:57:08 -04:00 • committed by Andreas Kling
parent 5af715e394
commit 4aca24481e
5 changed files with 80 additions and 22 deletions
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27
Ladybird/BrowserWindow.cpp
View file

@ -8,6 +8,7 @@
*/
#include "BrowserWindow.h"
#include "ConsoleWidget.h"
#include "Settings.h"
#include "SettingsDialog.h"
#include "Utilities.h"
@ -546,8 +547,13 @@ void BrowserWindow::reset_zoom()
void BrowserWindow::select_all()
{
if (auto* tab = m_current_tab)
tab->view().select_all();
if (!m_current_tab)
return;
if (auto* console = m_current_tab->view().console(); console && console->isActiveWindow())
console->view().select_all();
else
m_current_tab->view().select_all();
}
void BrowserWindow::update_displayed_zoom_level()
@ -560,11 +566,18 @@ void BrowserWindow::update_displayed_zoom_level()
void BrowserWindow::copy_selected_text()
{
if (auto* tab = m_current_tab) {
auto text = tab->view().selected_text();
auto* clipboard = QGuiApplication::clipboard();
clipboard->setText(qstring_from_ak_deprecated_string(text));
}
if (!m_current_tab)
return;
DeprecatedString text;
if (auto* console = m_current_tab->view().console(); console && console->isActiveWindow())
text = console->view().selected_text();
else
text = m_current_tab->view().selected_text();
auto* clipboard = QGuiApplication::clipboard();
clipboard->setText(qstring_from_ak_deprecated_string(text));
}
void BrowserWindow::resizeEvent(QResizeEvent* event)

50
Ladybird/ConsoleWidget.cpp
View file

@ -11,25 +11,46 @@
#include "ConsoleWidget.h"
#include "Utilities.h"
#include "WebContentView.h"
#include <AK/StringBuilder.h>
#include <LibJS/MarkupGenerator.h>
#include <QLineEdit>
#include <QPalette>
#include <QPushButton>
#include <QTextEdit>
#include <QVBoxLayout>
namespace Ladybird {
static bool is_using_dark_system_theme(QWidget& widget)
{
// FIXME: Qt does not provide any method to query if the system is using a dark theme. We will have to implement
// platform-specific methods if we wish to have better detection. For now, this inspects if Qt is using a
// dark color for widget backgrounds using Rec. 709 luma coefficients.
// https://en.wikipedia.org/wiki/Rec._709#Luma_coefficients
auto color = widget.palette().color(widget.backgroundRole());
auto luma = 0.2126f * color.redF() + 0.7152f * color.greenF() + 0.0722f * color.blueF();
return luma <= 0.5f;
}
ConsoleWidget::ConsoleWidget()
{
setLayout(new QVBoxLayout);
m_output_view = new QTextEdit(this);
m_output_view->setReadOnly(true);
layout()->addWidget(m_output_view);
m_output_view = new WebContentView({}, WebView::EnableCallgrindProfiling::No);
if (is_using_dark_system_theme(*this))
m_output_view->update_palette(WebContentView::PaletteMode::Dark);
if (on_request_messages)
on_request_messages(0);
m_output_view->load("data:text/html,<html></html>"sv);
// Wait until our output WebView is loaded, and then request any messages that occurred before we existed
m_output_view->on_load_finish = [this](auto&) {
if (on_request_messages)
on_request_messages(0);
};
layout()->addWidget(m_output_view);
auto* bottom_container = new QWidget(this);
bottom_container->setLayout(new QHBoxLayout);
@ -139,12 +160,27 @@ void ConsoleWidget::print_source_line(StringView source)
void ConsoleWidget::print_html(StringView line)
{
m_output_view->append(QString::fromUtf8(line.characters_without_null_termination(), line.length()));
StringBuilder builder;
builder.append(R"~~~(
var p = document.createElement("p");
p.innerHTML = ")~~~"sv);
builder.append_escaped_for_json(line);
builder.append(R"~~~("
document.body.appendChild(p);
)~~~"sv);
// FIXME: Make it scroll to the bottom, using `window.scrollTo()` in the JS above.
// We used to call `m_output_view->scroll_to_bottom();` here, but that does not work because
// it runs synchronously, meaning it happens before the HTML is output via IPC above.
m_output_view->run_javascript(builder.string_view());
}
void ConsoleWidget::clear_output()
{
m_output_view->clear();
m_output_view->run_javascript(R"~~~(
document.body.innerHTML = "";
)~~~"sv);
}
void ConsoleWidget::reset()

6
Ladybird/ConsoleWidget.h
View file

@ -15,7 +15,7 @@
#include <QWidget>
class QLineEdit;
class QTextEdit;
class WebContentView;
namespace Ladybird {
@ -31,6 +31,8 @@ public:
void print_html(StringView);
void reset();
WebContentView& view() { return *m_output_view; }
Function<void(DeprecatedString const&)> on_js_input;
Function<void(i32)> on_request_messages;
@ -38,7 +40,7 @@ private:
void request_console_messages();
void clear_output();
QTextEdit* m_output_view { nullptr };
WebContentView* m_output_view { nullptr };
QLineEdit* m_input { nullptr };
i32 m_highest_notified_message_index { -1 };

9
Ladybird/WebContentView.cpp
View file

@ -567,11 +567,12 @@ void WebContentView::hideEvent(QHideEvent* event)
client().async_set_system_visibility_state(false);
}
static Core::AnonymousBuffer make_system_theme_from_qt_palette(QWidget& widget)
static Core::AnonymousBuffer make_system_theme_from_qt_palette(QWidget& widget, WebContentView::PaletteMode mode)
{
auto qt_palette = widget.palette();
auto theme = Gfx::load_system_theme(DeprecatedString::formatted("{}/res/themes/Default.ini", s_serenity_resource_root)).release_value_but_fixme_should_propagate_errors();
auto theme_file = mode == WebContentView::PaletteMode::Default ? "Default"sv : "Dark"sv;
auto theme = Gfx::load_system_theme(DeprecatedString::formatted("{}/res/themes/{}.ini", s_serenity_resource_root, theme_file)).release_value_but_fixme_should_propagate_errors();
auto palette_impl = Gfx::PaletteImpl::create_with_anonymous_buffer(theme);
auto palette = Gfx::Palette(move(palette_impl));
@ -594,9 +595,9 @@ static Core::AnonymousBuffer make_system_theme_from_qt_palette(QWidget& widget)
return theme;
}
void WebContentView::update_palette()
void WebContentView::update_palette(PaletteMode mode)
{
client().async_update_system_theme(make_system_theme_from_qt_palette(*this));
client().async_update_system_theme(make_system_theme_from_qt_palette(*this, mode));
}
void WebContentView::create_client(WebView::EnableCallgrindProfiling enable_callgrind_profiling)

10
Ladybird/WebContentView.h
View file

@ -98,6 +98,8 @@ public:
void show_js_console();
void show_inspector();
Ladybird::ConsoleWidget* console() { return m_console_widget; };
ErrorOr<String> dump_layout_tree();
void set_viewport_rect(Gfx::IntRect);
@ -107,6 +109,12 @@ public:
Gfx::IntPoint to_content(Gfx::IntPoint) const;
Gfx::IntPoint to_widget(Gfx::IntPoint) const;
enum class PaletteMode {
Default,
Dark,
};
void update_palette(PaletteMode = PaletteMode::Default);
virtual void notify_server_did_layout(Badge<WebContentClient>, Gfx::IntSize content_size) override;
virtual void notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id) override;
virtual void notify_server_did_invalidate_content_rect(Badge<WebContentClient>, Gfx::IntRect const&) override;
@ -198,8 +206,6 @@ private:
bool is_inspector_open() const;
void close_sub_widgets();
void update_palette();
qreal m_inverse_pixel_scaling_ratio { 1.0 };
bool m_should_show_line_box_borders { false };