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Reintroduce complex selection merging behaviour

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Selection merging is necessary if we want X to work nicely when we are
on EOL (jumping to next line is as nice as it could be, and we are much
more often on EOL nowadays).
This commit is contained in:
Maxime Coste 2018-03-01 15:21:55 +11:00
parent 34c7db0ea7
commit f907e6cc46
1 changed files with 30 additions and 2 deletions
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32
src/normal.cc
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@ -20,6 +20,7 @@
#include "shell_manager.hh"
#include "string.hh"
#include "user_interface.hh"
#include "unit_tests.hh"
#include "window.hh"
namespace Kakoune
@ -34,6 +35,33 @@ enum class SelectMode
Append,
};
void merge_selections(Selection& sel, const Selection& new_sel)
{
const bool forward = sel.cursor() >= sel.anchor();
const bool new_forward = new_sel.cursor() > new_sel.anchor();
if (forward and new_forward)
sel.anchor() = std::min(sel.anchor(), new_sel.anchor());
const bool backward = sel.cursor() <= sel.anchor();
const bool new_backward = new_sel.cursor() < new_sel.anchor();
if (backward and new_backward)
sel.anchor() = std::max(sel.anchor(), new_sel.anchor());
sel.cursor() = new_sel.cursor();
}
UnitTest test_merge_selection{[] {
auto merge = [](Selection sel, const Selection& new_sel) {
merge_selections(sel, new_sel);
return sel;
};
kak_assert(merge({{0, 1}, {0, 2} }, {{0, 3}, {0, 4}}) == Selection{{0, 1}, {0, 4}});
kak_assert(merge({{0, 1}, {0, 2} }, {{0, 1}, {0, 2}}) == Selection{{0, 1}, {0, 2}});
kak_assert(merge({{0, 1}, {0, 2} }, {{0, 0}, {0, 0}}) == Selection{{0, 1}, {0, 0}});
kak_assert(merge({{0, 1}, {0, 2} }, {{0, 0}, {0, 3}}) == Selection{{0, 0}, {0, 3}});
kak_assert(merge({{0, 1}, {0, 3} }, {{0, 4}, {0, 2}}) == Selection{{0, 1}, {0, 2}});
kak_assert(merge({{0, 1}, {0, 2} }, {{0, 1}, {0, 1}}) == Selection{{0, 1}, {0, 1}});
}};
template<SelectMode mode, typename T>
void select(Context& context, T func)
{
@ -63,7 +91,7 @@ void select(Context& context, T func)
}
if (mode == SelectMode::Extend)
sel.cursor() = res->cursor();
merge_selections(sel, *res);
else
{
sel.anchor() = res->anchor();
@ -788,7 +816,7 @@ void search(Context& context, NormalParams params)
if (mode == SelectMode::Replace)
sel = keep_direction(find_next_match<direction>(context, sel, regex, wrapped), sel);
if (mode == SelectMode::Extend)
sel.cursor() = find_next_match<direction>(context, sel, regex, wrapped).cursor();
merge_selections(sel, find_next_match<direction>(context, sel, regex, wrapped));
}
selections.sort_and_merge_overlapping();
} while (--c > 0);