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https://github.com/genodelabs/genode.git
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decorator: generalize include/decorator/window.h
This change makes it possible to reuse the generic window decorator classes in include/decorator/ for decorators of a different structure. E.g., instead of painting decorations on a single nitpicker session, each window may paint its decorations into additional window-specific nitpicker sessions.
This commit is contained in:
Norman Feske
Christian Helmuth
parent
493386ed27
commit
acb0ddd9ef
@ -1,5 +1,5 @@
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/*
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* \brief Accessor for the default font
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* \brief Accessor for textures
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* \author Norman Feske
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* \date 2015-09-16
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*/
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@ -205,7 +205,35 @@ static bool attribute_has_value(Genode::Xml_node node,
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bool Decorator::Window::update(Genode::Xml_node window_node)
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{
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bool updated = Window_base::update(window_node);
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bool updated = false;
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/*
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* Detect the need to bring the window to the top of the global
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* view stack.
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*/
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unsigned const topped_cnt = attribute(window_node, "topped", 0UL);
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if (topped_cnt != _topped_cnt) {
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_global_to_front = true;
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_topped_cnt = topped_cnt;
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_nitpicker_stacking_up_to_date = false;
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updated |= true;
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}
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/*
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* Detect geometry changes
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*/
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Rect new_geometry = rect_attribute(window_node);
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if (new_geometry.p1() != geometry().p1()
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|| new_geometry.p2() != geometry().p2()) {
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geometry(new_geometry);
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_nitpicker_views_up_to_date = false;
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updated |= true;
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}
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_focused = attribute_has_value(window_node, "focused", "yes");
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_has_alpha = attribute_has_value(window_node, "has_alpha", "yes");
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@ -29,6 +29,82 @@ class Decorator::Window : public Window_base
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{
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private:
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Nitpicker::Session_client &_nitpicker;
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/*
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* Flag indicating that the current window position has been propagated
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* to the window's corresponding nitpicker views.
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*/
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bool _nitpicker_views_up_to_date = false;
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/*
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* Flag indicating that the stacking position of the window within the
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* window stack has changed. The new stacking position must be
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* propagated to nitpicker.
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*/
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bool _nitpicker_stacking_up_to_date = false;
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Nitpicker::Session::View_handle _neighbor;
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struct Nitpicker_view
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{
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Nitpicker::Session_client &_nitpicker;
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Nitpicker::Session::View_handle _handle { _nitpicker.create_view() };
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typedef Nitpicker::Session::Command Command;
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Nitpicker_view(Nitpicker::Session_client &nitpicker, unsigned id = 0)
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:
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_nitpicker(nitpicker)
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{
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/*
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* We supply the window ID as label for the anchor view.
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*/
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if (id) {
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char buf[128];
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Genode::snprintf(buf, sizeof(buf), "%d", id);
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_nitpicker.enqueue<Command::Title>(_handle, buf);
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}
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}
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~Nitpicker_view()
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{
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_nitpicker.destroy_view(_handle);
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}
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Nitpicker::Session::View_handle handle() const { return _handle; }
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void stack(Nitpicker::Session::View_handle neighbor)
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{
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_nitpicker.enqueue<Command::To_front>(_handle, neighbor);
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}
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void place(Rect rect)
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{
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_nitpicker.enqueue<Command::Geometry>(_handle, rect);
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Point offset = Point(0, 0) - rect.p1();
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_nitpicker.enqueue<Command::Offset>(_handle, offset);
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}
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};
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Nitpicker_view _bottom_view { _nitpicker },
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_right_view { _nitpicker },
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_left_view { _nitpicker },
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_top_view { _nitpicker };
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Nitpicker_view _content_view { _nitpicker, id() };
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static Border _init_border() {
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return Border(_border_size + _title_height,
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_border_size, _border_size, _border_size); }
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Border const _border { _init_border() };
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bool _global_to_front = false;
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unsigned _topped_cnt = 0;
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Window_title _title;
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bool _focused = false;
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@ -41,9 +117,6 @@ class Decorator::Window : public Window_base
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static unsigned const _border_size = 4;
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static unsigned const _title_height = 16;
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static Border _border() {
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return Border(_border_size + _title_height,
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_border_size, _border_size, _border_size); }
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Color _bright = { 255, 255, 255, 64 };
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Color _dark = { 0, 0, 0, 127 };
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@ -54,7 +127,6 @@ class Decorator::Window : public Window_base
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Area const _icon_size { 16, 16 };
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/*
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* Intensity of the title-bar radient in percent. A value of 0 produces
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* no gradient. A value of 100 creates a gradient from white over
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@ -329,10 +401,78 @@ class Decorator::Window : public Window_base
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Window(unsigned id, Nitpicker::Session_client &nitpicker,
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Animator &animator, Config const &config)
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:
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Window_base(id, nitpicker, _border()),
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Window_base(id),
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_nitpicker(nitpicker),
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_animator(animator), _config(config)
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{ }
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void stack(Nitpicker::Session::View_handle neighbor) override
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{
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_neighbor = neighbor;
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_nitpicker_stacking_up_to_date = false;
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}
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Nitpicker::Session::View_handle frontmost_view() const override
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{
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return _bottom_view.handle();
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}
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Rect outer_geometry() const override
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{
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return Rect(geometry().p1() - Point(_border.left, _border.top),
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geometry().p2() + Point(_border.right, _border.bottom));
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}
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void border_rects(Rect *top, Rect *left, Rect *right, Rect *bottom) const
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{
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outer_geometry().cut(geometry(), top, left, right, bottom);
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}
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bool is_in_front_of(Window_base const &neighbor) const override
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{
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return _neighbor == neighbor.frontmost_view();
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}
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void update_nitpicker_views() override
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{
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if (!_nitpicker_views_up_to_date) {
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/* update view positions */
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Rect top, left, right, bottom;
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border_rects(&top, &left, &right, &bottom);
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_content_view.place(geometry());
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_top_view .place(top);
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_left_view .place(left);
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_right_view .place(right);
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_bottom_view .place(bottom);
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_nitpicker_views_up_to_date = true;
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}
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if (!_nitpicker_stacking_up_to_date) {
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/*
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* Bring the view to the global top of the view stack if the
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* 'topped' counter changed. Otherwise, we refer to a
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* session-local neighbor for the restacking operation.
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*/
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Nitpicker::Session::View_handle neighbor = _neighbor;
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if (_global_to_front) {
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neighbor = Nitpicker::Session::View_handle();
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_global_to_front = false;
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}
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_content_view.stack(neighbor);
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_top_view.stack(_content_view.handle());
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_left_view.stack(_top_view.handle());
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_right_view.stack(_left_view.handle());
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_bottom_view.stack(_right_view.handle());
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_nitpicker_stacking_up_to_date = true;
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}
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}
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void adapt_to_changed_config()
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{
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_base_color = _config.base_color(_title);
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@ -85,11 +85,8 @@ class Decorator::Window_base : public Window_list::Element
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virtual void draw_behind(Canvas_base &, Window_base const &, Rect) const = 0;
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};
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private:
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Nitpicker::Session_client &_nitpicker;
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/*
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* Geometry of content
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*/
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@ -100,114 +97,22 @@ class Decorator::Window_base : public Window_list::Element
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*/
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unsigned const _id;
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/*
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* Flag indicating that the current window position has been propagated
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* to the window's corresponding nitpicker views.
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*/
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bool _nitpicker_views_up_to_date = false;
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/*
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* Flag indicating that the stacking position of the window within the
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* window stack has changed. The new stacking position must be
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* propagated to nitpicker.
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*/
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bool _nitpicker_stacking_up_to_date = false;
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unsigned _topped_cnt = 0;
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bool _global_to_front = false;
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Nitpicker::Session::View_handle _neighbor;
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Border const _border;
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struct Nitpicker_view
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{
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Nitpicker::Session_client &_nitpicker;
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Nitpicker::Session::View_handle _handle { _nitpicker.create_view() };
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typedef Nitpicker::Session::Command Command;
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Nitpicker_view(Nitpicker::Session_client &nitpicker, unsigned id = 0)
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:
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_nitpicker(nitpicker)
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{
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/*
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* We supply the window ID as label for the anchor view.
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*/
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if (id) {
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char buf[128];
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Genode::snprintf(buf, sizeof(buf), "%d", id);
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_nitpicker.enqueue<Command::Title>(_handle, buf);
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}
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}
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~Nitpicker_view()
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{
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_nitpicker.destroy_view(_handle);
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}
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Nitpicker::Session::View_handle handle() const { return _handle; }
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void stack(Nitpicker::Session::View_handle neighbor)
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{
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_nitpicker.enqueue<Command::To_front>(_handle, neighbor);
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}
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void place(Rect rect)
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{
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_nitpicker.enqueue<Command::Geometry>(_handle, rect);
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Point offset = Point(0, 0) - rect.p1();
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_nitpicker.enqueue<Command::Offset>(_handle, offset);
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}
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};
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Nitpicker_view _bottom_view, _right_view, _left_view, _top_view;
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Nitpicker_view _content_view;
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public:
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Window_base(unsigned id, Nitpicker::Session_client &nitpicker,
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Border border)
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:
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_nitpicker(nitpicker), _id(id), _border(border),
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_bottom_view(nitpicker),
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_right_view(nitpicker),
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_left_view(nitpicker),
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_top_view(nitpicker),
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_content_view(nitpicker, _id)
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{ }
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void stack(Nitpicker::Session::View_handle neighbor)
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{
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_neighbor = neighbor;
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_nitpicker_stacking_up_to_date = false;
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}
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Nitpicker::Session::View_handle frontmost_view() const
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{
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return _bottom_view.handle();
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}
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Rect outer_geometry() const
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{
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return Rect(_geometry.p1() - Point(_border.left, _border.top),
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_geometry.p2() + Point(_border.right, _border.bottom));
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}
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void border_rects(Rect *top, Rect *left, Rect *right, Rect *bottom) const
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{
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outer_geometry().cut(_geometry, top, left, right, bottom);
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}
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Window_base(unsigned id) : _id(id) { }
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unsigned long id() const { return _id; }
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Rect geometry() const { return _geometry; }
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bool is_in_front_of(Window_base const &neighbor) const
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{
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return _neighbor == neighbor.frontmost_view();
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}
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void geometry(Rect geometry) { _geometry = geometry; }
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virtual Rect outer_geometry() const = 0;
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virtual void stack(Nitpicker::Session::View_handle neighbor) = 0;
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virtual Nitpicker::Session::View_handle frontmost_view() const = 0;
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virtual bool is_in_front_of(Window_base const &neighbor) const = 0;
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/**
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* Draw window elements
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@ -227,79 +132,9 @@ class Decorator::Window_base : public Window_list::Element
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* decorations haven't been redrawn already. If we updated the
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* nitpicker views at this point, we would reveal not-yet-drawn pixels.
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*/
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virtual bool update(Xml_node window_node)
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{
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bool result = false;
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virtual bool update(Xml_node window_node) = 0;
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/*
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* Detect the need to bring the window to the top of the global
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* view stack.
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*/
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unsigned const topped_cnt = attribute(window_node, "topped", 0UL);
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if (topped_cnt != _topped_cnt) {
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_global_to_front = true;
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_topped_cnt = topped_cnt;
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_nitpicker_stacking_up_to_date = false;
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result = true;
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}
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/*
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* Detect geometry changes
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*/
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Rect new_geometry = rect_attribute(window_node);
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if (new_geometry.p1() != _geometry.p1()
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|| new_geometry.p2() != _geometry.p2()) {
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_geometry = new_geometry;
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_nitpicker_views_up_to_date = false;
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result = true;
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}
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return result;
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}
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virtual void update_nitpicker_views()
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{
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if (!_nitpicker_views_up_to_date) {
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/* update view positions */
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Rect top, left, right, bottom;
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border_rects(&top, &left, &right, &bottom);
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_content_view.place(_geometry);
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_top_view .place(top);
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_left_view .place(left);
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_right_view .place(right);
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_bottom_view .place(bottom);
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_nitpicker_views_up_to_date = true;
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}
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if (!_nitpicker_stacking_up_to_date) {
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/*
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* Bring the view to the global top of the view stack if the
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* 'topped' counter changed. Otherwise, we refer to a
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* session-local neighbor for the restacking operation.
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*/
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Nitpicker::Session::View_handle neighbor = _neighbor;
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if (_global_to_front) {
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neighbor = Nitpicker::Session::View_handle();
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_global_to_front = false;
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}
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_content_view.stack(neighbor);
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_top_view.stack(_content_view.handle());
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_left_view.stack(_top_view.handle());
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_right_view.stack(_left_view.handle());
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_bottom_view.stack(_right_view.handle());
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_nitpicker_stacking_up_to_date = true;
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}
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}
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virtual void update_nitpicker_views() { }
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/**
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* Report information about element at specified position
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