kakoune/src/option_manager.cc

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#include "option_manager.hh"
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#include "assert.hh"
#include <sstream>
namespace Kakoune
{
OptionDesc::OptionDesc(String name, String docstring, OptionFlags flags)
: m_name(std::move(name)), m_docstring(std::move(docstring)),
m_flags(flags) {}
Option::Option(const OptionDesc& desc, OptionManager& manager)
: m_manager(manager), m_desc(desc) {}
OptionManager::OptionManager(OptionManager& parent)
: m_parent(&parent)
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{
parent.register_watcher(*this);
}
OptionManager::~OptionManager()
{
if (m_parent)
m_parent->unregister_watcher(*this);
kak_assert(m_watchers.empty());
}
void OptionManager::register_watcher(OptionManagerWatcher& watcher)
{
kak_assert(not contains(m_watchers, &watcher));
m_watchers.push_back(&watcher);
}
void OptionManager::unregister_watcher(OptionManagerWatcher& watcher)
{
auto it = find(m_watchers.begin(), m_watchers.end(), &watcher);
kak_assert(it != m_watchers.end());
m_watchers.erase(it);
}
Option& OptionManager::get_local_option(const String& name)
{
auto it = find_option(m_options, name);
if (it != m_options.end())
return **it;
else if (m_parent)
{
m_options.emplace_back((*m_parent)[name].clone(*this));
return *m_options.back();
}
else
throw option_not_found(name);
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}
const Option& OptionManager::operator[](const String& name) const
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{
auto it = find_option(m_options, name);
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if (it != m_options.end())
return **it;
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else if (m_parent)
return (*m_parent)[name];
else
throw option_not_found(name);
}
template<typename MatchingFunc>
CandidateList OptionManager::get_matching_names(MatchingFunc func)
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{
CandidateList result;
if (m_parent)
result = m_parent->get_matching_names(func);
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for (auto& option : m_options)
{
if (option->flags() & OptionFlags::Hidden)
continue;
const auto& name = option->name();
if (func(name) and not contains(result, name))
result.push_back(name);
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}
return result;
}
CandidateList OptionManager::complete_option_name(StringView prefix,
ByteCount cursor_pos)
{
using namespace std::placeholders;
auto real_prefix = prefix.substr(0, cursor_pos);
auto result = get_matching_names(std::bind(prefix_match, _1, real_prefix));
if (result.empty())
result = get_matching_names(std::bind(subsequence_match, _1, real_prefix));
return result;
}
OptionManager::OptionList OptionManager::flatten_options() const
{
OptionList res = m_parent ? m_parent->flatten_options() : OptionList{};
for (auto& option : m_options)
{
auto it = find_option(res, option->name());
if (it != res.end())
*it = option.get();
else
res.emplace_back(option.get());
}
return res;
}
void OptionManager::on_option_changed(const Option& option)
{
// if parent option changed, but we overrided it, it's like nothing happened
if (&option.manager() != this and
find_option(m_options, option.name()) != m_options.end())
return;
for (auto watcher : m_watchers)
watcher->on_option_changed(option);
}
GlobalOptions::GlobalOptions()
: OptionManager()
{
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declare_option("tabstop", "size of a tab character", 8);
declare_option("indentwidth", "indentation width", 4);
declare_option("scrolloff",
"number of lines to keep visible main cursor when scrolling",
0);
declare_option("eolformat", "end of line format: 'crlf' or 'lf'", "lf"_str);
declare_option("BOM", "insert a byte order mark when writing buffer",
"no"_str);
declare_option("complete_prefix",
"complete up to common prefix in tab completion",
true);
declare_option("incsearch",
"incrementaly apply search/select/split regex",
true);
declare_option("autoinfo",
"automatically display contextual help",
true);
declare_option("autoshowcompl",
"automatically display possible completions for prompts",
true);
declare_option("aligntab",
"use tab characters when possible for alignement",
false);
declare_option("ignored_files",
"patterns to ignore when completing filenames",
Regex{R"(^(\..*|.*\.(o|so|a))$)"});
declare_option("filetype", "buffer filetype", ""_str);
declare_option("path", "path to consider when trying to find a file",
std::vector<String>({ "./", "/usr/include" }));
declare_option("completers", "insert mode completers to execute.",
std::vector<String>({"filename", "word=all"}),
OptionFlags::None,
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OptionChecker<std::vector<String>>([](const std::vector<String>& s) {
static const auto values = {"word=buffer", "word=all", "filename"};
for (auto& v : s)
{
if (v.substr(0_byte, 7_byte) == "option=")
continue;
if (not contains(values, v))
throw runtime_error(v + " is not a recognised value for completers");
}
}));
declare_option("autoreload",
"autoreload buffer when a filesystem modification is detected",
Ask);
}
}