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#include <memory>
#include <vector>
#include <wayfire/per-output-plugin.hpp>
#include <wayfire/view.hpp>
#include <wayfire/view-access-interface.hpp>
#include <wayfire/signal-definitions.hpp>
#include <wayfire/view-transform.hpp>
#include <wayfire/parser/rule_parser.hpp>
#include <wayfire/lexer/lexer.hpp>
#include <wayfire/variant.hpp>
#include <wayfire/rule/lambda_rule.hpp>
#include <wayfire/rule/rule.hpp>
#include <wayfire/util/log.hpp>
#include <wayfire/option-wrapper.hpp>
#include <wayfire/toplevel-view.hpp>
#include "lambda-rules-registration.hpp"
#include "view-action-interface.hpp"
#include "wayfire/signal-provider.hpp"
class wayfire_window_rules_t : public wf::per_output_plugin_instance_t
{
public:
void init() override;
void fini() override;
void apply(const std::string & signal, wayfire_view view);
private:
void setup_rules_from_config();
wf::lexer_t _lexer;
// Created rule handler.
wf::signal::connection_t<wf::view_mapped_signal> on_view_mapped = [=] (wf::view_mapped_signal *ev)
{
apply("created", ev->view);
};
// Maximized rule handler.
wf::signal::connection_t<wf::view_tiled_signal> _tiled = [=] (wf::view_tiled_signal *ev)
{
apply("maximized", ev->view);
apply("unmaximized", ev->view);
};
// Minimized rule handler.
wf::signal::connection_t<wf::view_minimized_signal> _minimized = [=] (wf::view_minimized_signal *ev)
{
apply("minimized", ev->view);
};
// Fullscreened rule handler.
wf::signal::connection_t<wf::view_fullscreen_signal> _fullscreened = [=] (wf::view_fullscreen_signal *ev)
{
apply("fullscreened", ev->view);
};
// Auto-reload on changes to config file
wf::signal::connection_t<wf::reload_config_signal> _reload_config = [=] (wf::reload_config_signal *ev)
{
setup_rules_from_config();
};
std::vector<std::shared_ptr<wf::rule_t>> _rules;
wf::view_access_interface_t _access_interface;
wf::view_action_interface_t _action_interface;
nonstd::observer_ptr<wf::lambda_rules_registrations_t> _lambda_registrations;
};
void wayfire_window_rules_t::init()
{
// Get the lambda rules registrations.
_lambda_registrations = wf::lambda_rules_registrations_t::get_instance();
_lambda_registrations->window_rule_instances++;
setup_rules_from_config();
output->connect(&on_view_mapped);
output->connect(&_tiled);
output->connect(&_minimized);
output->connect(&_fullscreened);
wf::get_core().connect(&_reload_config);
}
void wayfire_window_rules_t::fini()
{
_lambda_registrations->window_rule_instances--;
if (_lambda_registrations->window_rule_instances == 0)
{
wf::get_core().erase_data<wf::lambda_rules_registrations_t>();
}
}
void wayfire_window_rules_t::apply(const std::string & signal, wayfire_view view)
{
if (view == nullptr)
{
return;
}
auto toplevel = toplevel_cast(view);
if ((signal == "maximized") && (!toplevel || (toplevel->pending_tiled_edges() != wf::TILED_EDGES_ALL)))
{
return;
}
if ((signal == "unmaximized") && (!toplevel || (toplevel->pending_tiled_edges() == wf::TILED_EDGES_ALL)))
{
return;
}
for (const auto & rule : _rules)
{
_access_interface.set_view(view);
_action_interface.set_view(view);
auto error = rule->apply(signal, _access_interface, _action_interface);
if (error)
{
LOGE("Window-rules: Error while executing rule on ", signal, " signal.");
}
}
auto bounds = _lambda_registrations->rules();
auto begin = std::get<0>(bounds);
auto end = std::get<1>(bounds);
while (begin != end)
{
auto registration = std::get<1>(*begin);
bool error = false;
// Assume we will use the view access interface.
_access_interface.set_view(view);
wf::access_interface_t & access_iface = _access_interface;
// If a custom access interface is set in the regoistration, use this one.
if (registration->access_interface != nullptr)
{
access_iface = *registration->access_interface;
}
// Load if lambda wrapper.
if (registration->if_lambda != nullptr)
{
registration->rule_instance->setIfLambda(
[registration, signal, view] () -> bool
{
return registration->if_lambda(signal, view);
});
}
// Load else lambda wrapper.
if (registration->else_lambda)
{
registration->rule_instance->setElseLambda(
[registration, signal, view] () -> bool
{
return registration->else_lambda(signal, view);
});
}
// Run the lambda rule.
error = registration->rule_instance->apply(signal, _access_interface);
// Unload wrappers.
registration->rule_instance->setIfLambda(nullptr);
registration->rule_instance->setElseLambda(nullptr);
if (error)
{
LOGE("Window-rules: Error while executing rule on signal: ", signal,
", rule text:", registration->rule);
}
++begin;
}
}
void wayfire_window_rules_t::setup_rules_from_config()
{
_rules.clear();
wf::option_wrapper_t<wf::config::compound_list_t<std::string>> rule_list_option{"window-rules/rules"};
auto rule_list = rule_list_option.value();
for (const auto& [name, rule_str] : rule_list)
{
LOGD("Registering ", rule_str);
_lexer.reset(rule_str);
auto rule = wf::rule_parser_t().parse(_lexer);
if (rule != nullptr)
{
_rules.push_back(rule);
}
}
}
DECLARE_WAYFIRE_PLUGIN(wf::per_output_plugin_t<wayfire_window_rules_t>);
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