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LibJS+WebContent+Browser+js: Implement console.group() methods

Browse source 
This implements:
- console.group()
- console.groupCollapsed()
- console.groupEnd()

In the Browser, we use `<details>` for the groups, which is not actually
implemented yet, so groups are always open.

In the REPL, groups are non-interactive, but still indent any output.
This looks weird since the console prompt and return values remain on
the far left, but this matches what Node does so it's probably fine. :^)
I expect `console.group()` is not used much outside of browsers.
This commit is contained in:
Sam Atkins 2021-12-22 12:32:15 +00:00 • committed by Andreas Kling
parent ff5e07d718
commit d702678d16
10 changed files with 281 additions and 25 deletions
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67
Userland/Applications/Browser/ConsoleWidget.cpp
View file

@ -111,6 +111,12 @@ void ConsoleWidget::handle_console_messages(i32 start_index, const Vector<String
print_html(message);
} else if (type == "clear") {
clear_output();
} else if (type == "group") {
begin_group(message, true);
} else if (type == "groupCollapsed") {
begin_group(message, false);
} else if (type == "groupEnd") {
end_group();
} else {
VERIFY_NOT_REACHED();
}
@ -138,26 +144,85 @@ void ConsoleWidget::print_source_line(StringView source)
void ConsoleWidget::print_html(StringView line)
{
StringBuilder builder;
int parent_id = m_group_stack.is_empty() ? 0 : m_group_stack.last().id;
if (parent_id == 0) {
builder.append(R"~~~(
var parentGroup = document.body;
)~~~");
} else {
builder.appendff(R"~~~(
var parentGroup = document.getElementById("group_{}");
)~~~",
parent_id);
}
builder.append(R"~~~(
var p = document.createElement("p");
p.innerHTML = ")~~~");
builder.append_escaped_for_json(line);
builder.append(R"~~~("
document.body.appendChild(p);
parentGroup.appendChild(p);
)~~~");
m_output_view->run_javascript(builder.string_view());
// 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.
// (See also: begin_group())
}
void ConsoleWidget::clear_output()
{
m_group_stack.clear();
m_output_view->run_javascript(R"~~~(
document.body.innerHTML = "";
)~~~");
}
void ConsoleWidget::begin_group(StringView label, bool start_expanded)
{
StringBuilder builder;
int parent_id = m_group_stack.is_empty() ? 0 : m_group_stack.last().id;
if (parent_id == 0) {
builder.append(R"~~~(
var parentGroup = document.body;
)~~~");
} else {
builder.appendff(R"~~~(
var parentGroup = document.getElementById("group_{}");
)~~~",
parent_id);
}
Group group;
group.id = m_next_group_id++;
group.label = label;
builder.appendff(R"~~~(
var group = document.createElement("details");
group.id = "group_{}";
var label = document.createElement("summary");
label.innerText = ")~~~",
group.id);
builder.append_escaped_for_json(label);
builder.append(R"~~~(";
group.appendChild(label);
parentGroup.appendChild(group);
)~~~");
if (start_expanded)
builder.append("group.open = true;");
m_output_view->run_javascript(builder.string_view());
// FIXME: Scroll console to bottom - see note in print_html()
m_group_stack.append(group);
}
void ConsoleWidget::end_group()
{
m_group_stack.take_last();
}
void ConsoleWidget::reset()
{
clear_output();