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Filters: add a show line numbers filter

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This commit is contained in:
Maxime Coste 2011-10-17 19:01:36 +00:00
parent 2badb9d708
commit 316e84f119
3 changed files with 36 additions and 1 deletions
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35
src/filters.cc
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@ -70,7 +70,7 @@ void expand_tabulations(DisplayBuffer& display_buffer)
atom_it = display_buffer.split(atom_it, it+1);
BufferCoord pos = it.buffer().line_and_column_at(it);
int column = 0;
for (auto line_it = it.buffer().iterator_at({pos.line, 0});
line_it != it; ++line_it)
@ -90,4 +90,37 @@ void expand_tabulations(DisplayBuffer& display_buffer)
}
}
void show_line_numbers(DisplayBuffer& display_buffer)
{
const Buffer& buffer = display_buffer.front().begin().buffer();
BufferCoord coord = buffer.line_and_column_at(display_buffer.begin()->begin());
int last_line = buffer.line_and_column_at(display_buffer.back().end()-1).line;
for (; coord.line <= last_line; ++coord.line)
{
BufferIterator line_start = buffer.iterator_at(coord);
DisplayBuffer::iterator atom_it = display_buffer.atom_containing(line_start);
if (atom_it != display_buffer.end())
{
if (atom_it->begin() != line_start)
{
if (not atom_it->splitable())
continue;
atom_it = display_buffer.split(atom_it, line_start) + 1;
}
atom_it = display_buffer.insert(
atom_it,
DisplayAtom(atom_it->coord(),
atom_it->begin(), atom_it->begin(),
Color::Black, Color::White));
char buffer[6];
snprintf(buffer, 6, "%3d ", coord.line);
display_buffer.replace_atom_content(atom_it, buffer);
}
}
}
}

1
src/filters.hh
View File

@ -13,6 +13,7 @@ void colorize_regex(DisplayBuffer& display_buffer,
void colorize_cplusplus(DisplayBuffer& display_buffer);
void colorize_cplusplus(DisplayBuffer& display_buffer);
void expand_tabulations(DisplayBuffer& display_buffer);
void show_line_numbers(DisplayBuffer& display_buffer);
}

1
src/window.cc
View File

@ -114,6 +114,7 @@ Window::Window(Buffer& buffer)
m_filters.push_back(colorize_cplusplus);
m_filters.push_back(expand_tabulations);
m_filters.push_back(HighlightSelections(*this));
m_filters.push_back(show_line_numbers);
}
void Window::check_invariant() const