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Support counts for undo/redo

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This commit is contained in:
Maxime Coste 2016-07-20 20:20:03 +01:00
parent 3edd2c127c
commit 03a4b3c73f
3 changed files with 25 additions and 21 deletions
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27
src/buffer.cc
View File

@ -310,31 +310,38 @@ void Buffer::commit_undo_group()
m_history_cursor = node;
}
bool Buffer::undo() noexcept
bool Buffer::undo(size_t count) noexcept
{
commit_undo_group();
if (not m_history_cursor->parent)
return false;
for (const Modification& modification : m_history_cursor->undo_group | reverse())
apply_modification(modification.inverse());
while (count-- and m_history_cursor->parent)
{
for (const Modification& modification : m_history_cursor->undo_group | reverse())
apply_modification(modification.inverse());
m_history_cursor = m_history_cursor->parent;
}
m_history_cursor = m_history_cursor->parent;
return true;
}
bool Buffer::redo() noexcept
bool Buffer::redo(size_t count) noexcept
{
if (not m_history_cursor->redo_child)
return false;
kak_assert(m_current_undo_group.empty());
m_history_cursor = m_history_cursor->redo_child.get();
while (count-- and m_history_cursor->redo_child)
{
m_history_cursor = m_history_cursor->redo_child.get();
for (const Modification& modification : m_history_cursor->undo_group)
apply_modification(modification);
for (const Modification& modification : m_history_cursor->undo_group)
apply_modification(modification);
}
return true;
}
@ -826,8 +833,8 @@ UnitTest test_undo{[]()
buffer.commit_undo_group();
buffer.erase({2, 1}, {2, 5}); // change 5
buffer.commit_undo_group();
buffer.undo();
buffer.redo();
buffer.undo(2);
buffer.redo(2);
buffer.undo();
buffer.replace(2_line, buffer.end_coord(), "foo"); // change 6
buffer.commit_undo_group();

4
src/buffer.hh
View File

@ -132,8 +132,8 @@ public:
void set_fs_timestamp(timespec ts);
void commit_undo_group();
bool undo() noexcept;
bool redo() noexcept;
bool undo(size_t count = 1) noexcept;
bool redo(size_t count = 1) noexcept;
bool move_to(size_t history_id) noexcept;
String string(ByteCoord begin, ByteCoord end) const;

15
src/normal.cc
View File

@ -1414,37 +1414,34 @@ void restore_selections(Context& context, NormalParams params)
context.print_status({format("Restored selections from register '{}'", reg), get_face("Information")});
}
void undo(Context& context, NormalParams)
void undo(Context& context, NormalParams params)
{
Buffer& buffer = context.buffer();
size_t timestamp = buffer.timestamp();
bool res = buffer.undo();
if (res)
if (buffer.undo(std::max(1, params.count)))
{
auto ranges = compute_modified_ranges(buffer, timestamp);
if (not ranges.empty())
context.selections_write_only() = std::move(ranges);
context.selections().avoid_eol();
}
else if (not res)
else
context.print_status({ "nothing left to undo", get_face("Information") });
}
void redo(Context& context, NormalParams)
void redo(Context& context, NormalParams params)
{
using namespace std::placeholders;
Buffer& buffer = context.buffer();
size_t timestamp = buffer.timestamp();
bool res = buffer.redo();
if (res)
if (buffer.redo(std::max(1, params.count)))
{
auto ranges = compute_modified_ranges(buffer, timestamp);
if (not ranges.empty())
context.selections_write_only() = std::move(ranges);
context.selections().avoid_eol();
}
else if (not res)
else
context.print_status({ "nothing left to redo", get_face("Information") });
}