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LibWeb: Support window.devicePixelRatio

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This always returns 1 for now. I've added a FIXME about returning 2 in
HiDPI mode.
This commit is contained in:
Andreas Kling 2021-09-27 16:34:06 +02:00
parent e26e85a3d2
commit 7410736b0f
4 changed files with 19 additions and 0 deletions
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9
Userland/Libraries/LibWeb/Bindings/WindowObject.cpp
View file

@ -67,6 +67,7 @@ void WindowObject::initialize_global_object()
define_native_accessor("screen", screen_getter, {}, JS::Attribute::Enumerable);
define_native_accessor("innerWidth", inner_width_getter, {}, JS::Attribute::Enumerable);
define_native_accessor("innerHeight", inner_height_getter, {}, JS::Attribute::Enumerable);
define_native_accessor("devicePixelRatio", device_pixel_ratio_getter, {}, JS::Attribute::Enumerable | JS::Attribute::Configurable);
u8 attr = JS::Attribute::Writable | JS::Attribute::Enumerable | JS::Attribute::Configurable;
define_native_function("alert", alert, 0, attr);
define_native_function("confirm", confirm, 0, attr);
@ -506,6 +507,14 @@ JS_DEFINE_NATIVE_FUNCTION(WindowObject::inner_height_getter)
return JS::Value(impl->inner_height());
}
JS_DEFINE_NATIVE_FUNCTION(WindowObject::device_pixel_ratio_getter)
{
auto* impl = impl_from(vm, global_object);
if (!impl)
return {};
return JS::Value(impl->device_pixel_ratio());
}
JS_DEFINE_NATIVE_FUNCTION(WindowObject::get_computed_style)
{
auto* impl = impl_from(vm, global_object);

2
Userland/Libraries/LibWeb/Bindings/WindowObject.h
View file

@ -81,6 +81,8 @@ private:
JS_DECLARE_NATIVE_FUNCTION(parent_getter);
JS_DECLARE_NATIVE_FUNCTION(device_pixel_ratio_getter);
JS_DECLARE_NATIVE_GETTER(scroll_x_getter);
JS_DECLARE_NATIVE_GETTER(scroll_y_getter);
JS_DECLARE_NATIVE_FUNCTION(scroll);

6
Userland/Libraries/LibWeb/DOM/Window.cpp
View file

@ -309,4 +309,10 @@ void Window::queue_microtask(JS::FunctionObject& callback)
});
}
float Window::device_pixel_ratio() const
{
// FIXME: Return 2.0f if we're in HiDPI mode!
return 1.0f;
}
}

2
Userland/Libraries/LibWeb/DOM/Window.h
View file

@ -87,6 +87,8 @@ public:
void fire_a_page_transition_event(FlyString event_name, bool persisted);
float device_pixel_ratio() const;
private:
explicit Window(Document&);