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optimize template class to reduce generated binary size

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This commit is contained in:
Jinhao 2016-02-17 01:18:18 +08:00
parent 2dd9283782
commit 0ed51a7a21
2 changed files with 178 additions and 134 deletions
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201
include/nana/gui/detail/general_events.hpp
View File

@ -24,6 +24,9 @@ namespace nana
{
namespace detail
{
void events_operation_register(event_handle);
void events_operation_cancel(event_handle);
class event_interface
{
public:
@ -38,8 +41,50 @@ namespace nana
virtual event_interface* get_event() const = 0;
};
void events_operation_register(event_handle);
void events_operation_cancel(event_handle);
struct docker_base
: public docker_interface
{
event_interface * event_ptr;
bool flag_deleted{ false };
const bool unignorable;
docker_base(event_interface*, bool unignorable_flag);
detail::event_interface * get_event() const override;
};
class event_base
: public detail::event_interface
{
public:
~event_base();
std::size_t length() const;
void clear() noexcept;
void remove(event_handle evt) override;
protected:
//class emit_counter is a RAII helper for emitting count
//It is used for avoiding a try{}catch block which is required for some finial works when
//event handlers throw exceptions.
class emit_counter
{
public:
emit_counter(event_base*);
~emit_counter();
private:
event_base * const evt_;
};
//event_handle _m_emplace(::std::unique_ptr<detail::docker_interface>& docker_ptr, bool in_front);
event_handle _m_emplace(detail::docker_interface*, bool in_front);
protected:
unsigned emitting_count_{ 0 };
bool deleted_flags_{ false };
//std::unique_ptr<std::vector<std::unique_ptr<detail::docker_interface>>> dockers_;
std::vector<detail::docker_interface*> * dockers_{ nullptr };
};
}//end namespace detail
/// base clase for all event argument types
@ -59,83 +104,32 @@ namespace nana
/// the type of the members of general_events
template<typename Arg>
class basic_event : public detail::event_interface
class basic_event : public detail::event_base
{
public:
using arg_reference = const typename std::remove_reference<Arg>::type &;
private:
struct docker
: public detail::docker_interface
: public detail::docker_base
{
basic_event * const event_ptr;
std::function<void(arg_reference)> invoke;
bool flag_deleted{ false };
bool unignorable{false};
docker(basic_event * s, std::function<void(arg_reference)> && ivk, bool unignorable_flag)
: event_ptr(s), invoke(std::move(ivk)), unignorable(unignorable_flag)
docker(basic_event * evt, std::function<void(arg_reference)> && ivk, bool unignorable_flag)
: docker_base(evt, unignorable_flag), invoke(std::move(ivk))
{}
docker(basic_event * s, const std::function<void(arg_reference)> & ivk, bool unignorable_flag)
: event_ptr(s), invoke(ivk), unignorable(unignorable_flag)
docker(basic_event * evt, const std::function<void(arg_reference)> & ivk, bool unignorable_flag)
: docker_base(evt, unignorable_flag), invoke(ivk)
{}
~docker()
{
detail::events_operation_cancel(reinterpret_cast<event_handle>(this));
}
detail::event_interface * get_event() const override
{
return event_ptr;
}
};
//class emit_counter is a RAII helper for emitting count
//It is used for avoiding a try{}catch block which is required for some finial works when
//event handlers throw exceptions.
class emit_counter
{
public:
emit_counter(basic_event* evt)
: evt_{evt}
{
++evt->emitting_count_;
}
~emit_counter()
{
if ((0 == --evt_->emitting_count_) && evt_->deleted_flags_)
{
evt_->deleted_flags_ = false;
for (auto i = evt_->dockers_->begin(); i != evt_->dockers_->end();)
{
if (static_cast<docker*>(i->get())->flag_deleted)
i = evt_->dockers_->erase(i);
else
++i;
}
}
}
private:
basic_event * const evt_;
};
public:
/// It will get called firstly, because it is set at the beginning of the chain.
/// Creates an event handler at the beginning of event chain
template<typename Function>
event_handle connect_front(Function && fn)
{
internal_scope_guard lock;
if (nullptr == dockers_)
dockers_.reset(new std::vector<std::unique_ptr<detail::docker_interface>>);
using prototype = typename std::remove_reference<Function>::type;
std::unique_ptr<detail::docker_interface> dck(new docker(this, factory<prototype, std::is_bind_expression<prototype>::value>::build(std::forward<Function>(fn)), false));
auto evt = reinterpret_cast<event_handle>(dck.get());
dockers_->emplace(dockers_->begin(), std::move(dck));
detail::events_operation_register(evt);
return evt;
return _m_emplace(new docker(this, factory<prototype, std::is_bind_expression<prototype>::value>::build(std::forward<Function>(fn)), false), true);
}
event_handle connect(void (*fn)(arg_reference))
@ -149,16 +143,9 @@ namespace nana
template<typename Function>
event_handle connect(Function && fn)
{
internal_scope_guard lock;
if (nullptr == dockers_)
dockers_.reset(new std::vector<std::unique_ptr<detail::docker_interface>>);
using prototype = typename std::remove_reference<Function>::type;
std::unique_ptr<detail::docker_interface> dck(new docker(this, factory<prototype, std::is_bind_expression<prototype>::value>::build(std::forward<Function>(fn)), false));
auto evt = reinterpret_cast<event_handle>(dck.get());
dockers_->emplace_back(std::move(dck));
detail::events_operation_register(evt);
return evt;
return _m_emplace(new docker(this, factory<prototype, std::is_bind_expression<prototype>::value>::build(std::forward<Function>(fn)), false), false);
}
/// It will not get called if stop_propagation() was called.
@ -172,25 +159,9 @@ namespace nana
template<typename Function>
event_handle connect_unignorable(Function && fn, bool in_front = false)
{
internal_scope_guard lock;
if (nullptr == dockers_)
dockers_.reset(new std::vector<std::unique_ptr<detail::docker_interface>>);
using prototype = typename std::remove_reference<Function>::type;
std::unique_ptr<detail::docker_interface> dck(new docker(this, factory<prototype, std::is_bind_expression<prototype>::value>::build(std::forward<Function>(fn)), true));
auto evt = reinterpret_cast<event_handle>(dck.get());
if (in_front)
dockers_->emplace(dockers_->begin(), std::move(dck));
else
dockers_->emplace_back(std::move(dck));
detail::events_operation_register(evt);
return evt;
}
std::size_t length() const
{
internal_scope_guard lock;
return (nullptr == dockers_ ? 0 : dockers_->size());
return _m_emplace(new docker(this, factory<prototype, std::is_bind_expression<prototype>::value>::build(std::forward<Function>(fn)), true), in_front);
}
void emit(arg_reference& arg)
@ -202,13 +173,13 @@ namespace nana
emit_counter ec(this);
auto& dockers = *dockers_;
const auto dockers_len = dockers.size();
const auto dockers_len = dockers_->size();
//The dockers may resize when a new event handler is created by a calling handler.
//Traverses with position can avaid crash error which caused by a iterator which becomes invalid.
for (std::size_t pos = 0; pos < dockers_len; ++pos)
{
auto docker_ptr = static_cast<docker*>(dockers[pos].get());
auto docker_ptr = static_cast<docker*>(dockers[pos]);
if (docker_ptr->flag_deleted)
continue;
@ -217,7 +188,7 @@ namespace nana
{
for (++pos; pos < dockers_len; ++pos)
{
auto docker_ptr = static_cast<docker*>(dockers[pos].get());
auto docker_ptr = static_cast<docker*>(dockers[pos]);
if (!docker_ptr->unignorable || docker_ptr->flag_deleted)
continue;
@ -227,36 +198,6 @@ namespace nana
}
}
}
void clear()
{
internal_scope_guard lock;
if (dockers_)
dockers_.reset();
}
void remove(event_handle evt) override
{
internal_scope_guard lock;
if (dockers_)
{
for (auto i = dockers_->begin(), end = dockers_->end(); i != end; ++i)
{
if (reinterpret_cast<detail::docker_interface*>(evt) == i->get())
{
//Checks whether this event is working now.
if (emitting_count_ > 1)
{
static_cast<docker*>(i->get())->flag_deleted = true;
deleted_flags_ = true;
}
else
dockers_->erase(i);
break;
}
}
}
}
private:
template<typename Fn, bool IsBind>
struct factory
@ -413,10 +354,6 @@ namespace nana
};
}
};
private:
unsigned emitting_count_{ 0 };
bool deleted_flags_{ false };
std::unique_ptr<std::vector<std::unique_ptr<detail::docker_interface>>> dockers_;
};
struct arg_mouse
@ -427,12 +364,12 @@ namespace nana
::nana::point pos; ///< cursor position in the event window
::nana::mouse button; ///< indicates a button which triggers the event
bool left_button; ///< mouse left button is pressed?
bool mid_button; ///< mouse middle button is pressed?
bool right_button; ///< mouse right button is pressed?
bool alt; ///< keyboard alt is pressed?
bool shift; ///< keyboard Shift is pressed?
bool ctrl; ///< keyboard Ctrl is pressed?
bool left_button; ///< true if mouse left button is pressed
bool mid_button; ///< true if mouse middle button is pressed
bool right_button; ///< true if mouse right button is pressed
bool alt; ///< true if keyboard alt is pressed
bool shift; ///< true if keyboard Shift is pressed
bool ctrl; ///< true if keyboard Ctrl is pressed
/// Checks if left button is operated,
bool is_left_button() const
@ -481,7 +418,7 @@ namespace nana
event_code evt_code; ///< it is event_code::key_press in current event
::nana::window window_handle; ///< A handle to the event window
mutable wchar_t key; ///< the key corresponding to the key pressed
mutable bool ignore; ///< this member is not used
mutable bool ignore; ///< this member is only available for key_char event, set 'true' to ignore the input.
bool ctrl; ///< keyboard Ctrl is pressed?
bool shift; ///< keyboard Shift is pressed
};

107
source/gui/detail/events_operation.cpp
View File

@ -42,5 +42,112 @@ namespace nana
}
}
//end namespace events_operation
//class docker_base
docker_base::docker_base(event_interface* evt, bool unignorable_flag)
: event_ptr(evt), unignorable(unignorable_flag)
{}
detail::event_interface * docker_base::get_event() const
{
return event_ptr;
}
//end class docker_base
//class event_base
event_base::~event_base()
{
clear();
}
std::size_t event_base::length() const
{
internal_scope_guard lock;
return (nullptr == dockers_ ? 0 : dockers_->size());
}
void event_base::clear() noexcept
{
internal_scope_guard lock;
if (dockers_)
{
for (auto p : *dockers_)
{
detail::events_operation_cancel(reinterpret_cast<event_handle>(p));
delete p;
}
dockers_->clear();
delete dockers_;
dockers_ = nullptr;
}
}
void event_base::remove(event_handle evt)
{
internal_scope_guard lock;
if (dockers_)
{
for (auto i = dockers_->begin(), end = dockers_->end(); i != end; ++i)
{
if (reinterpret_cast<detail::docker_interface*>(evt) == *i)
{
//Checks whether this event is working now.
if (emitting_count_ > 1)
{
static_cast<docker_base*>(*i)->flag_deleted = true;
deleted_flags_ = true;
}
else
dockers_->erase(i);
break;
}
}
}
}
event_handle event_base::_m_emplace(detail::docker_interface* docker_ptr, bool in_front)
{
internal_scope_guard lock;
if (nullptr == dockers_)
dockers_ = new std::vector<detail::docker_interface*>;
auto evt = reinterpret_cast<event_handle>(docker_ptr);
if (in_front)
dockers_->emplace(dockers_->begin(), docker_ptr);
else
dockers_->emplace_back(docker_ptr);
detail::events_operation_register(evt);
return evt;
}
//class emit_counter
event_base::emit_counter::emit_counter(event_base* evt)
: evt_{ evt }
{
++evt->emitting_count_;
}
event_base::emit_counter::~emit_counter()
{
if ((0 == --evt_->emitting_count_) && evt_->deleted_flags_)
{
evt_->deleted_flags_ = false;
for (auto i = evt_->dockers_->begin(); i != evt_->dockers_->end();)
{
if (static_cast<docker_base*>(*i)->flag_deleted)
i = evt_->dockers_->erase(i);
else
++i;
}
}
}
//end class emit_counter
//end class event_base
}//end namespace detail
}//end namespace nana