mirror of https://github.com/polybar/polybar.git
87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
#include <csignal>
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#include <thread>
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#include "components/config.hpp"
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#include "components/logger.hpp"
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#include "components/screen.hpp"
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#include "components/types.hpp"
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#include "x11/connection.hpp"
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#include "x11/randr.hpp"
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#include "x11/winspec.hpp"
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POLYBAR_NS
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/**
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* Configure injection module
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*/
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di::injector<unique_ptr<screen>> configure_screen() {
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return di::make_injector(configure_connection(), configure_logger(), configure_config());
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}
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/**
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* Construct screen instance
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*/
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screen::screen(connection& conn, const logger& logger, const config& conf)
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: m_connection(conn)
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, m_log(logger)
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, m_conf(conf)
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, m_root(conn.root())
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, m_size({conn.screen()->width_in_pixels, conn.screen()->height_in_pixels}) {
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// Check if the reloading has been disabled by the user
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if (!m_conf.get<bool>("settings", "screenchange-reload", false)) {
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return;
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}
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// clang-format off
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m_proxy = winspec(m_connection)
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<< cw_size(1U, 1U)
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<< cw_pos(-1, -1)
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<< cw_parent(m_root)
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<< cw_params_override_redirect(true)
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<< cw_params_event_mask(XCB_EVENT_MASK_PROPERTY_CHANGE)
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<< cw_flush(true);
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// clang-format on
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// Receive randr events
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m_connection.randr().select_input(m_proxy, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
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m_connection.ensure_event_mask(m_root, XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY);
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// Create window used as event proxy
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m_connection.map_window(m_proxy);
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m_connection.flush();
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// Wait until the proxy window has been mapped
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using evt = xcb_map_notify_event_t;
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m_connection.wait_for_response<evt, XCB_MAP_NOTIFY>([&](const evt& evt) -> bool { return evt.window == m_proxy; });
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m_connection.clear_event_mask(m_root);
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// Finally attach the sink the process randr events
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m_connection.attach_sink(this, 1);
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}
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/**
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* Deconstruct screen instance
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*/
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screen::~screen() {
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m_connection.detach_sink(this, 1);
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if (m_proxy) {
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m_connection.destroy_window(m_proxy);
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}
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}
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/**
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* Handle XCB_RANDR_SCREEN_CHANGE_NOTIFY events
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*
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* If the screen dimensions have changed we raise USR1 to trigger a reload
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*/
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void screen::handle(const evt::randr_screen_change_notify& evt) {
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if (!m_sigraised && evt->request_window == m_proxy) {
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m_log.warn("randr_screen_change_notify (%ux%u)... reloading", evt->width, evt->height);
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m_sigraised = true;
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kill(getpid(), SIGUSR1);
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}
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}
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POLYBAR_NS_END
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