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Fix Clamp crash when entries_ size is zero (#306)

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Run ftxui_example_homescreen on Windows, then select compiler tab, crash on origin code.

Co-authored-by: chenpeizhe <peizhe.chen@horizon.ai>
This commit is contained in:
pezy
2022-01-13 08:46:09 +08:00
committed by GitHub
parent 3dc215e6c0
commit feb24b9498
6 changed files with 40 additions and 21 deletions
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11
src/ftxui/component/menu.cpp
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@@ -14,7 +14,8 @@
#include "ftxui/component/screen_interactive.hpp" // for Component
#include "ftxui/dom/elements.hpp" // for operator|, Element, reflect, text, nothing, select, vbox, Elements, focus
#include "ftxui/screen/box.hpp" // for Box
#include "ftxui/util/ref.hpp" // for Ref, ConstStringListRef, ConstStringRef
#include "ftxui/screen/util.hpp"
#include "ftxui/util/ref.hpp" // for Ref, ConstStringListRef, ConstStringRef
namespace ftxui {
@@ -74,7 +75,7 @@ class MenuBase : public ComponentBase {
if (event == Event::TabReverse && size())
*selected_ = (*selected_ + size() - 1) % size();
*selected_ = std::clamp(*selected_, 0, size() - 1);
*selected_ = util::clamp(*selected_, 0, size() - 1);
if (*selected_ != old_selected) {
focused_entry() = *selected_;
@@ -131,7 +132,7 @@ class MenuBase : public ComponentBase {
if (event.mouse().button == Mouse::WheelDown)
(*selected_)++;
*selected_ = std::clamp(*selected_, 0, size() - 1);
*selected_ = util::clamp(*selected_, 0, size() - 1);
if (*selected_ != old_selected)
option_->on_change();
@@ -140,8 +141,8 @@ class MenuBase : public ComponentBase {
void Clamp() {
boxes_.resize(size());
*selected_ = std::clamp(*selected_, 0, size() - 1);
focused_entry() = std::clamp(focused_entry(), 0, size() - 1);
*selected_ = util::clamp(*selected_, 0, size() - 1);
focused_entry() = util::clamp(focused_entry(), 0, size() - 1);
}
bool Focusable() const final { return entries_.size(); }