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#ifndef context_hh_INCLUDED
#define context_hh_INCLUDED
#include "window.hh"
#include "input_handler.hh"
#include "user_interface.hh"
namespace Kakoune
{
// A Context is used to access non singleton objects for various services
// in commands.
//
// The Context object links an InputHandler, an Editor (which may be a Window),
// and a UserInterface. It may represent an interactive user window, or
// a hook execution or a macro replay.
struct Context
{
Context() {}
explicit Context(Editor& editor)
: m_editor(&editor) {}
Context(InputHandler& input_handler, Editor& editor, UserInterface& ui)
: m_input_handler(&input_handler), m_editor(&editor), m_ui(&ui) {}
// to allow func(Context(Editor(...)))
// make sure the context will not survive the next ';'
explicit Context(Editor&& editor)
: m_editor(&editor) {}
Context(const Context&) = delete;
Context(Context&&) = default;
Context& operator=(const Context&) = delete;
Buffer& buffer() const
{
if (not has_buffer())
throw runtime_error("no buffer in context");
return m_editor->buffer();
}
bool has_buffer() const { return (bool)m_editor; }
Editor& editor() const
{
if (not has_editor())
throw runtime_error("no editor in context");
return *m_editor.get();
}
bool has_editor() const { return (bool)m_editor; }
Window& window() const
{
if (not has_window())
throw runtime_error("no window in context");
return *dynamic_cast<Window*>(m_editor.get());
}
bool has_window() const { return (bool)m_editor and dynamic_cast<Window*>(m_editor.get()); }
InputHandler& input_handler() const
{
if (not has_input_handler())
throw runtime_error("no input handler in context");
return *m_input_handler;
}
bool has_input_handler() const { return (bool)m_input_handler; }
UserInterface& ui() const
{
if (not has_ui())
throw runtime_error("no user interface in context");
return *m_ui;
}
bool has_ui() const { return (bool)m_ui; }
void change_editor(Editor& editor)
{
m_editor.reset(&editor);
if (has_window() && has_ui())
window().set_dimensions(ui().dimensions());
}
OptionManager& options() const
{
if (has_window())
return window().options();
if (has_buffer())
return buffer().options();
return GlobalOptions::instance();
}
void print_status(const String& status) const
{
if (has_ui())
ui().print_status(status);
}
using Insertion = std::pair<InsertMode, std::vector<Key>>;
Insertion& last_insert() { return m_last_insert; }
void push_jump()
{
const Selection& jump = editor().selections().back();
if (m_current_jump != m_jump_list.end())
{
auto begin = m_current_jump;
// when jump overlaps with m_current_jump, we replace m_current_jump
// instead of pushing after it.
if (&begin->first().buffer() != &jump.first().buffer() or
not overlaps(*begin, jump))
++begin;
m_jump_list.erase(begin, m_jump_list.end());
}
m_jump_list.push_back(jump);
m_current_jump = m_jump_list.end();
}
Selection jump_forward()
{
if (m_current_jump != m_jump_list.end() and
m_current_jump + 1 != m_jump_list.end())
return *++m_current_jump;
throw runtime_error("no next jump");
}
Selection jump_backward()
{
if (m_current_jump != m_jump_list.begin())
{
if (m_current_jump == m_jump_list.end())
{
push_jump();
--m_current_jump;
}
return *--m_current_jump;
}
throw runtime_error("no previous jump");
}
void forget_jumps_to_buffer(Buffer& buffer)
{
for (auto it = m_jump_list.begin(); it != m_jump_list.end();)
{
if (&it->first().buffer() == &buffer)
{
if (it < m_current_jump)
--m_current_jump;
else if (it == m_current_jump)
m_current_jump = m_jump_list.end()-1;
it = m_jump_list.erase(it);
}
else
++it;
}
}
int& numeric_param() { return m_numeric_param; }
private:
safe_ptr<Editor> m_editor;
safe_ptr<InputHandler> m_input_handler;
safe_ptr<UserInterface> m_ui;
Insertion m_last_insert = {InsertMode::Insert, {}};
int m_numeric_param = 0;
SelectionList m_jump_list;
SelectionList::iterator m_current_jump = m_jump_list.begin();
};
}
#endif // context_hh_INCLUDED
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