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Fix crash when adapting window position post buffer modifications

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This commit is contained in:
Maxime Coste 2018-06-13 05:00:35 +10:00
parent 0bdde991ea
commit ee19497d37
1 changed files with 4 additions and 3 deletions
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7
src/window.cc
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@ -130,9 +130,10 @@ const DisplayBuffer& Window::update_display_buffer(const Context& context)
{ {
for (auto&& change : buffer().changes_since(m_display_buffer.timestamp())) for (auto&& change : buffer().changes_since(m_display_buffer.timestamp()))
{ {
if (change.begin.line < m_position.line) if (change.type == Buffer::Change::Insert and change.begin.line < m_position.line)
m_position.line += (change.type == Buffer::Change::Insert ? 1 : -1) * m_position.line += change.end.line - change.begin.line;
(change.end.line - change.begin.line); if (change.type == Buffer::Change::Erase and change.begin.line < m_position.line)
m_position.line = std::max(m_position.line - (change.end.line - change.begin.line), change.begin.line);
} }
} }