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tray: documentation

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patrick96 2023-03-23 22:38:42 +01:00
parent f6172e1459
commit 89f29fa12e
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3 changed files with 21 additions and 22 deletions
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7
include/x11/tray_client.hpp
View File

@ -106,6 +106,11 @@ class client : public non_copyable_mixin, public non_movable_mixin {
*/
xembed::info m_xembed{};
/**
* Background pixmap of wrapper window
*/
xcb_pixmap_t m_pixmap{XCB_NONE};
/**
* Whether the wrapper window is currently mapped.
*/
@ -124,8 +129,6 @@ class client : public non_copyable_mixin, public non_movable_mixin {
shared_ptr<bg_slice> m_bg_slice;
unique_ptr<cairo::context> m_context;
unique_ptr<cairo::xcb_surface> m_surface;
xcb_pixmap_t m_pixmap{XCB_NONE};
};
} // namespace tray

17
src/x11/tray_client.cpp
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@ -3,19 +3,28 @@
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_icccm.h>
#include "xpp/pixmap.hpp"
#include "utils/memory.hpp"
#include "x11/connection.hpp"
#include "x11/ewmh.hpp"
#include "x11/winspec.hpp"
#include "xpp/pixmap.hpp"
POLYBAR_NS
namespace tray {
/*
* TODO proper background of wrapper window
* The client window is embedded into a wrapper window with identical, size, depth, and visual.
* This wrapper window is used to paint the background of the icon (also dealing with transparent backgrounds through
* pseudo-transparency).
*
* True transprency is currently not supported here because it cannot be achieved with external compositors (those only
* seem to work for top-level windows) and has to be implemented by hand.
*
* TODO proper background of wrapper window:
*
* (TODO: Check if this is still necessary, the current approach seems to work)
*
* Do first possible:
*
@ -342,11 +351,13 @@ void client::update_bg() const {
m_log.trace("%s: Update background", name());
// Composite background slice with background color.
// TODO this doesn't have to be done if the background color is not transparent.
m_context->clear();
auto root_bg = m_bg_slice->get_surface();
if (root_bg != nullptr) {
// TODO the compositing doesn't have to be done if the background color is not transparent.
// In that case, the bg slice can be completely skipped, we shouldn't event observe the background
*m_context << CAIRO_OPERATOR_SOURCE << *root_bg;
m_context->paint();
*m_context << CAIRO_OPERATOR_OVER;

19
src/x11/tray_manager.cpp
View File

@ -27,28 +27,13 @@
*
* Ref: https://specifications.freedesktop.org/systemtray-spec/systemtray-spec-latest.html
*
* This class manages embedded tray icons by placing them on the bar in the correct position; the position itself is
* This class manages embedded tray icons by placing them on the bar in the correct positions; the start position is
* requested by the renderer.
*
* The tray manager needs to trigger bar updates only when the size of the entire tray changes (e.g. when tray icons are
* added/removed). EVerything else can be handled without an update.
* added/removed). Everything else can be handled without an update.
*/
// ====================================================================================================
//
// TODO: 32-bit visual
//
// _NET_SYSTEM_TRAY_VISUAL visual_id VISUALID/32
//
// The property should be set by the tray manager to indicate the preferred visual for icon windows.
//
// To avoid ambiguity about the colormap to use this visual must either be the default visual for
// the screen or it must be a TrueColor visual. If this property is set to a visual with an alpha
// channel, the tray manager must use the Composite extension to composite the icon against the
// background using PictOpOver.
//
// ====================================================================================================
POLYBAR_NS
namespace tray {