mirror of
https://github.com/mawww/kakoune.git
synced 2024-12-18 08:51:46 +03:00
530 lines
17 KiB
C++
530 lines
17 KiB
C++
#include "selection.hh"
|
|
|
|
#include "buffer_utils.hh"
|
|
#include "changes.hh"
|
|
#include "utf8.hh"
|
|
|
|
namespace Kakoune
|
|
{
|
|
|
|
SelectionList::SelectionList(Buffer& buffer, Selection s, size_t timestamp)
|
|
: m_buffer(&buffer), m_selections({ std::move(s) }), m_timestamp(timestamp)
|
|
{
|
|
check_invariant();
|
|
}
|
|
|
|
SelectionList::SelectionList(Buffer& buffer, Selection s)
|
|
: SelectionList(buffer, std::move(s), buffer.timestamp()) {}
|
|
|
|
SelectionList::SelectionList(Buffer& buffer, Vector<Selection> list, size_t timestamp)
|
|
: m_buffer(&buffer), m_selections(std::move(list)), m_timestamp(timestamp)
|
|
{
|
|
kak_assert(size() > 0);
|
|
m_main = size() - 1;
|
|
check_invariant();
|
|
}
|
|
|
|
SelectionList::SelectionList(Buffer& buffer, Vector<Selection> list)
|
|
: SelectionList(buffer, std::move(list), buffer.timestamp()) {}
|
|
|
|
SelectionList::SelectionList(SelectionList::UnsortedTag, Buffer& buffer, Vector<Selection> list, size_t timestamp, size_t main)
|
|
: m_buffer(&buffer), m_selections(std::move(list)), m_timestamp(timestamp)
|
|
{
|
|
sort_and_merge_overlapping();
|
|
check_invariant();
|
|
}
|
|
|
|
void SelectionList::remove(size_t index)
|
|
{
|
|
m_selections.erase(begin() + index);
|
|
if (index < m_main or m_main == m_selections.size())
|
|
--m_main;
|
|
}
|
|
void SelectionList::set(Vector<Selection> list, size_t main)
|
|
{
|
|
kak_assert(main < list.size());
|
|
m_selections = std::move(list);
|
|
m_main = main;
|
|
m_timestamp = m_buffer->timestamp();
|
|
sort_and_merge_overlapping();
|
|
check_invariant();
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
BufferCoord update_insert(BufferCoord coord, BufferCoord begin, BufferCoord end)
|
|
{
|
|
if (coord < begin)
|
|
return coord;
|
|
if (begin.line == coord.line)
|
|
coord.column += end.column - begin.column;
|
|
coord.line += end.line - begin.line;
|
|
kak_assert(coord.line >= 0 and coord.column >= 0);
|
|
return coord;
|
|
}
|
|
|
|
/* For reference
|
|
BufferCoord update_erase(BufferCoord coord, BufferCoord begin, BufferCoord end)
|
|
{
|
|
if (coord < begin)
|
|
return coord;
|
|
if (coord <= end)
|
|
return begin;
|
|
if (end.line == coord.line)
|
|
coord.column -= end.column - begin.column;
|
|
coord.line -= end.line - begin.line;
|
|
kak_assert(coord.line >= 0 and coord.column >= 0);
|
|
return coord;
|
|
} */
|
|
|
|
bool compare_selections(const Selection& lhs, const Selection& rhs)
|
|
{
|
|
const auto lmin = lhs.min(), rmin = rhs.min();
|
|
return lmin == rmin ? lhs.max() < rhs.max() : lmin < rmin;
|
|
}
|
|
|
|
template<typename Iterator, typename OverlapsFunc>
|
|
Iterator merge_overlapping(Iterator begin, Iterator end, size_t& main, OverlapsFunc overlaps)
|
|
{
|
|
if (begin == end)
|
|
return begin;
|
|
|
|
kak_assert(std::is_sorted(begin, end, compare_selections));
|
|
size_t size = end - begin;
|
|
size_t i = 0;
|
|
for (size_t j = 1; j < size; ++j)
|
|
{
|
|
if (overlaps(begin[i], begin[j]))
|
|
{
|
|
begin[i].min() = std::min(begin[i].min(), begin[j].min());
|
|
begin[i].max() = std::max(begin[i].max(), begin[j].max());
|
|
if (i < main)
|
|
--main;
|
|
}
|
|
else
|
|
{
|
|
++i;
|
|
if (i != j)
|
|
begin[i] = std::move(begin[j]);
|
|
}
|
|
}
|
|
kak_assert(std::is_sorted(begin, begin + i +1, compare_selections));
|
|
return begin + i + 1;
|
|
}
|
|
|
|
}
|
|
|
|
BufferCoord& get_first(Selection& sel) { return sel.min(); }
|
|
BufferCoord& get_last(Selection& sel) { return sel.max(); }
|
|
|
|
Vector<Selection> compute_modified_ranges(Buffer& buffer, size_t timestamp)
|
|
{
|
|
Vector<Selection> ranges;
|
|
auto changes = buffer.changes_since(timestamp);
|
|
auto change_it = changes.begin();
|
|
while (change_it != changes.end())
|
|
{
|
|
auto forward_end = forward_sorted_until(change_it, changes.end());
|
|
auto backward_end = backward_sorted_until(change_it, changes.end());
|
|
|
|
kak_assert(std::is_sorted(ranges.begin(), ranges.end(), compare_selections));
|
|
|
|
size_t prev_size;
|
|
size_t dummy = 0;
|
|
if (forward_end >= backward_end)
|
|
{
|
|
update_forward({ change_it, forward_end }, ranges);
|
|
ranges.erase(merge_overlapping(ranges.begin(), ranges.end(), dummy, overlaps), ranges.end());
|
|
prev_size = ranges.size();
|
|
|
|
ForwardChangesTracker changes_tracker;
|
|
for (; change_it != forward_end; ++change_it)
|
|
{
|
|
if (change_it->type == Buffer::Change::Insert)
|
|
ranges.emplace_back(change_it->begin, change_it->end);
|
|
else
|
|
ranges.emplace_back(change_it->begin);
|
|
changes_tracker.update(*change_it);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
update_backward({ change_it, backward_end }, ranges);
|
|
ranges.erase(merge_overlapping(ranges.begin(), ranges.end(), dummy, overlaps), ranges.end());
|
|
prev_size = ranges.size();
|
|
|
|
using ReverseIt = std::reverse_iterator<const Buffer::Change*>;
|
|
ForwardChangesTracker changes_tracker;
|
|
for (ReverseIt it{backward_end}, end{change_it}; it != end; ++it)
|
|
{
|
|
auto change = *it;
|
|
change.begin = changes_tracker.get_new_coord(change.begin);
|
|
change.end = changes_tracker.get_new_coord(change.end);
|
|
|
|
if (change.type == Buffer::Change::Insert)
|
|
ranges.emplace_back(change.begin, change.end);
|
|
else
|
|
ranges.emplace_back(change.begin);
|
|
changes_tracker.update(change);
|
|
}
|
|
change_it = backward_end;
|
|
}
|
|
|
|
kak_assert(std::is_sorted(ranges.begin() + prev_size, ranges.end(), compare_selections));
|
|
std::inplace_merge(ranges.begin(), ranges.begin() + prev_size, ranges.end(), compare_selections);
|
|
// The newly added ranges might be overlapping pre-existing ones
|
|
ranges.erase(merge_overlapping(ranges.begin(), ranges.end(), dummy, overlaps), ranges.end());
|
|
}
|
|
|
|
const auto end_coord = buffer.end_coord();
|
|
for (auto& range : ranges)
|
|
{
|
|
range.anchor() = std::min(range.anchor(), end_coord);
|
|
range.cursor() = std::min<BufferCoord>(range.cursor(), end_coord);
|
|
}
|
|
|
|
auto touches = [&](const Selection& lhs, const Selection& rhs) {
|
|
return lhs.max() == end_coord or buffer.char_next(lhs.max()) >= rhs.min();
|
|
};
|
|
size_t dummy = 0;
|
|
ranges.erase(merge_overlapping(ranges.begin(), ranges.end(), dummy, touches), ranges.end());
|
|
|
|
for (auto& sel : ranges)
|
|
{
|
|
kak_assert(buffer.is_valid(sel.anchor()));
|
|
kak_assert(buffer.is_valid(sel.cursor()));
|
|
|
|
if (buffer.is_end(sel.anchor()))
|
|
sel.anchor() = buffer.back_coord();
|
|
if (buffer.is_end(sel.cursor()))
|
|
sel.cursor() = buffer.back_coord();
|
|
|
|
if (sel.anchor() != sel.cursor())
|
|
sel.cursor() = buffer.char_prev(sel.cursor());
|
|
}
|
|
return ranges;
|
|
}
|
|
|
|
static void clamp(Selection& sel, const Buffer& buffer)
|
|
{
|
|
sel.anchor() = buffer.clamp(sel.anchor());
|
|
sel.cursor() = buffer.clamp(sel.cursor());
|
|
}
|
|
|
|
void clamp_selections(Vector<Selection>& selections, const Buffer& buffer)
|
|
{
|
|
for (auto& sel : selections)
|
|
clamp(sel, buffer);
|
|
}
|
|
|
|
void update_selections(Vector<Selection>& selections, size_t& main, Buffer& buffer, size_t timestamp)
|
|
{
|
|
if (timestamp == buffer.timestamp())
|
|
return;
|
|
|
|
auto changes = buffer.changes_since(timestamp);
|
|
auto change_it = changes.begin();
|
|
while (change_it != changes.end())
|
|
{
|
|
auto forward_end = forward_sorted_until(change_it, changes.end());
|
|
auto backward_end = backward_sorted_until(change_it, changes.end());
|
|
|
|
if (forward_end >= backward_end)
|
|
{
|
|
update_forward({ change_it, forward_end }, selections);
|
|
change_it = forward_end;
|
|
}
|
|
else
|
|
{
|
|
update_backward({ change_it, backward_end }, selections);
|
|
change_it = backward_end;
|
|
}
|
|
kak_assert(std::is_sorted(selections.begin(), selections.end(),
|
|
compare_selections));
|
|
selections.erase(
|
|
merge_overlapping(selections.begin(), selections.end(),
|
|
main, overlaps), selections.end());
|
|
}
|
|
for (auto& sel : selections)
|
|
clamp(sel, buffer);
|
|
|
|
selections.erase(merge_overlapping(selections.begin(), selections.end(),
|
|
main, overlaps), selections.end());
|
|
}
|
|
|
|
void SelectionList::update()
|
|
{
|
|
update_selections(m_selections, m_main, *m_buffer, m_timestamp);
|
|
check_invariant();
|
|
m_timestamp = m_buffer->timestamp();
|
|
}
|
|
|
|
void SelectionList::check_invariant() const
|
|
{
|
|
#ifdef KAK_DEBUG
|
|
auto& buffer = this->buffer();
|
|
kak_assert(size() > 0);
|
|
kak_assert(m_main < size());
|
|
const size_t timestamp = buffer.timestamp();
|
|
kak_assert(timestamp >= m_timestamp);
|
|
|
|
// cannot check further in that case
|
|
if (timestamp != m_timestamp)
|
|
return;
|
|
|
|
const auto end_coord = buffer.end_coord();
|
|
BufferCoord last_min{0,0};
|
|
for (auto& sel : m_selections)
|
|
{
|
|
auto& min = sel.min();
|
|
kak_assert(min >= last_min);
|
|
last_min = min;
|
|
|
|
const auto anchor = sel.anchor();
|
|
kak_assert(anchor >= BufferCoord{0,0} and anchor < end_coord);
|
|
kak_assert(anchor.column < buffer[anchor.line].length());
|
|
|
|
const auto cursor = sel.cursor();
|
|
kak_assert(cursor >= BufferCoord{0,0} and cursor < end_coord);
|
|
kak_assert(cursor.column < buffer[cursor.line].length());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void sort_selections(Vector<Selection>& selections, size_t& main_index)
|
|
{
|
|
if (selections.size() == 1)
|
|
return;
|
|
|
|
const auto& main = selections[main_index];
|
|
const auto main_begin = main.min();
|
|
main_index = std::count_if(selections.begin(), selections.end(),
|
|
[&](const Selection& sel) {
|
|
auto begin = sel.min();
|
|
if (begin == main_begin)
|
|
return &sel < &main;
|
|
else
|
|
return begin < main_begin;
|
|
});
|
|
std::stable_sort(selections.begin(), selections.end(), compare_selections);
|
|
}
|
|
|
|
void merge_overlapping_selections(Vector<Selection>& selections, size_t& main_index)
|
|
{
|
|
if (selections.size() == 1)
|
|
return;
|
|
|
|
selections.erase(Kakoune::merge_overlapping(selections.begin(), selections.end(),
|
|
main_index, overlaps), selections.end());
|
|
}
|
|
|
|
void SelectionList::sort()
|
|
{
|
|
sort_selections(m_selections, m_main);
|
|
}
|
|
|
|
void SelectionList::merge_overlapping()
|
|
{
|
|
merge_overlapping_selections(m_selections, m_main);
|
|
}
|
|
|
|
void SelectionList::merge_consecutive()
|
|
{
|
|
if (size() == 1)
|
|
return;
|
|
|
|
auto touches = [this](const Selection& lhs, const Selection& rhs) {
|
|
return m_buffer->char_next(lhs.max()) >= rhs.min();
|
|
};
|
|
m_selections.erase(Kakoune::merge_overlapping(begin(), end(),
|
|
m_main, touches), end());
|
|
}
|
|
|
|
void SelectionList::sort_and_merge_overlapping()
|
|
{
|
|
sort();
|
|
merge_overlapping();
|
|
}
|
|
|
|
BufferCoord get_insert_pos(const Buffer& buffer, const Selection& sel,
|
|
InsertMode mode)
|
|
{
|
|
switch (mode)
|
|
{
|
|
case InsertMode::Insert:
|
|
return sel.min();
|
|
case InsertMode::InsertCursor:
|
|
return sel.cursor();
|
|
case InsertMode::Append:
|
|
return buffer.char_next(sel.max());
|
|
case InsertMode::InsertAtLineBegin:
|
|
return sel.min().line;
|
|
case InsertMode::AppendAtLineEnd:
|
|
return {sel.max().line, buffer[sel.max().line].length() - 1};
|
|
case InsertMode::InsertAtNextLineBegin:
|
|
return sel.max().line+1;
|
|
default:
|
|
kak_assert(false);
|
|
return {};
|
|
}
|
|
}
|
|
|
|
static void fix_overflowing_selections(Vector<Selection>& selections,
|
|
const Buffer& buffer)
|
|
{
|
|
const BufferCoord back_coord = buffer.back_coord();
|
|
for (auto& sel : selections)
|
|
{
|
|
sel.cursor() = std::min(buffer.clamp(sel.cursor()), back_coord);
|
|
sel.anchor() = std::min(buffer.clamp(sel.anchor()), back_coord);
|
|
}
|
|
}
|
|
|
|
void SelectionList::insert(ConstArrayView<String> strings, InsertMode mode,
|
|
Vector<BufferCoord>* out_insert_pos)
|
|
{
|
|
if (strings.empty())
|
|
return;
|
|
|
|
update();
|
|
|
|
Vector<BufferCoord> insert_pos;
|
|
if (mode != InsertMode::Replace)
|
|
{
|
|
for (auto& sel : m_selections)
|
|
insert_pos.push_back(get_insert_pos(*m_buffer, sel, mode));
|
|
}
|
|
|
|
ForwardChangesTracker changes_tracker;
|
|
for (size_t index = 0; index < m_selections.size(); ++index)
|
|
{
|
|
auto& sel = m_selections[index];
|
|
|
|
sel.anchor() = changes_tracker.get_new_coord_tolerant(sel.anchor());
|
|
sel.cursor() = changes_tracker.get_new_coord_tolerant(sel.cursor());
|
|
kak_assert(m_buffer->is_valid(sel.anchor()) and
|
|
m_buffer->is_valid(sel.cursor()));
|
|
|
|
const String& str = strings[std::min(index, strings.size()-1)];
|
|
|
|
const auto pos = (mode == InsertMode::Replace) ?
|
|
sel.min() : changes_tracker.get_new_coord(insert_pos[index]);
|
|
|
|
if (mode == InsertMode::Replace)
|
|
replace(*m_buffer, sel, str);
|
|
else
|
|
m_buffer->insert(pos, str);
|
|
|
|
size_t old_timestamp = m_timestamp;
|
|
changes_tracker.update(*m_buffer, m_timestamp);
|
|
|
|
if (out_insert_pos)
|
|
out_insert_pos->push_back(pos);
|
|
|
|
if (mode == InsertMode::Replace)
|
|
{
|
|
auto changes = m_buffer->changes_since(old_timestamp);
|
|
if (changes.size() == 1) // Nothing got inserted, either str was empty, or just \n at end of buffer
|
|
sel.anchor() = sel.cursor() = m_buffer->clamp(pos);
|
|
else if (changes.size() == 2)
|
|
{
|
|
// we want min and max from *before* we do any change
|
|
auto& min = sel.min();
|
|
auto& max = sel.max();
|
|
min = changes.back().begin;
|
|
max = m_buffer->char_prev(changes.back().end);
|
|
}
|
|
else
|
|
kak_assert(changes.empty());
|
|
}
|
|
else if (not str.empty())
|
|
{
|
|
auto& change = m_buffer->changes_since(0).back();
|
|
sel.anchor() = m_buffer->clamp(update_insert(sel.anchor(), change.begin, change.end));
|
|
sel.cursor() = m_buffer->clamp(update_insert(sel.cursor(), change.begin, change.end));
|
|
}
|
|
}
|
|
|
|
// We might just have been deleting text if strings were empty,
|
|
// in which case we could have some selections pushed out of the buffer
|
|
if (mode == InsertMode::Replace)
|
|
fix_overflowing_selections(m_selections, *m_buffer);
|
|
|
|
check_invariant();
|
|
m_buffer->check_invariant();
|
|
}
|
|
|
|
void SelectionList::erase()
|
|
{
|
|
update();
|
|
merge_overlapping();
|
|
|
|
ForwardChangesTracker changes_tracker;
|
|
for (auto& sel : m_selections)
|
|
{
|
|
sel.anchor() = changes_tracker.get_new_coord(sel.anchor());
|
|
kak_assert(m_buffer->is_valid(sel.anchor()));
|
|
sel.cursor() = changes_tracker.get_new_coord(sel.cursor());
|
|
kak_assert(m_buffer->is_valid(sel.cursor()));
|
|
|
|
auto pos = Kakoune::erase(*m_buffer, sel);
|
|
sel.anchor() = sel.cursor() = pos;
|
|
changes_tracker.update(*m_buffer, m_timestamp);
|
|
}
|
|
|
|
fix_overflowing_selections(m_selections, *m_buffer);
|
|
m_buffer->check_invariant();
|
|
}
|
|
|
|
String selection_to_string(const Selection& selection)
|
|
{
|
|
auto& cursor = selection.cursor();
|
|
auto& anchor = selection.anchor();
|
|
return format("{}.{},{}.{}", anchor.line + 1, anchor.column + 1,
|
|
cursor.line + 1, cursor.column + 1);
|
|
}
|
|
|
|
String selection_list_to_string(const SelectionList& selections)
|
|
{
|
|
auto beg = &*selections.begin(), end = &*selections.end();
|
|
auto main = beg + selections.main_index();
|
|
using View = ConstArrayView<Selection>;
|
|
return join(concatenated(View{main, end}, View{beg, main}) |
|
|
transform(selection_to_string), ' ', false);
|
|
}
|
|
|
|
Selection selection_from_string(StringView desc)
|
|
{
|
|
auto comma = find(desc, ',');
|
|
auto dot_anchor = find(StringView{desc.begin(), comma}, '.');
|
|
auto dot_cursor = find(StringView{comma, desc.end()}, '.');
|
|
|
|
if (comma == desc.end() or dot_anchor == comma or dot_cursor == desc.end())
|
|
throw runtime_error(format("'{}' does not follow <line>.<column>,<line>.<column> format", desc));
|
|
|
|
BufferCoord anchor{str_to_int({desc.begin(), dot_anchor}) - 1,
|
|
str_to_int({dot_anchor+1, comma}) - 1};
|
|
|
|
BufferCoord cursor{str_to_int({comma+1, dot_cursor}) - 1,
|
|
str_to_int({dot_cursor+1, desc.end()}) - 1};
|
|
|
|
if (anchor.line < 0 or anchor.column < 0 or
|
|
cursor.line < 0 or cursor.column < 0)
|
|
throw runtime_error(format("coordinates must be >= 1: '{}'", desc));
|
|
|
|
return Selection{anchor, cursor};
|
|
}
|
|
|
|
SelectionList selection_list_from_string(Buffer& buffer, ConstArrayView<String> descs)
|
|
{
|
|
if (descs.empty())
|
|
throw runtime_error{"empty selection description"};
|
|
|
|
auto sels = descs | transform([&](auto&& d) { auto s = selection_from_string(d); clamp(s, buffer); return s; })
|
|
| gather<Vector<Selection>>();
|
|
return {SelectionList::UnsortedTag{}, buffer, std::move(sels), buffer.timestamp(), 0};
|
|
}
|
|
|
|
}
|