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Filters: add an expand_tabulation filter

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This commit is contained in:
Maxime Coste 2011-10-12 18:52:22 +00:00
parent f802a9f3be
commit 22bd9f90d5
5 changed files with 30 additions and 1 deletions
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1
src/display_buffer.hh
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@ -40,6 +40,7 @@ struct DisplayAtom
Color fg_color;
Color bg_color;
Attribute attribute;
BufferString replacement_text;
DisplayAtom(BufferIterator begin, BufferIterator end,
Color fg_color = Color::Default,

24
src/filters.cc
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@ -52,4 +52,28 @@ void colorize_cplusplus(DisplayBuffer& display_buffer)
colorize_regex(display_buffer, types_keywords, Color::Green);
}
void expand_tabulations(DisplayBuffer& display_buffer)
{
const int tabstop = 8;
for (auto atom_it = display_buffer.begin();
atom_it != display_buffer.end(); ++atom_it)
{
for (BufferIterator it = atom_it->begin; it != atom_it->end; ++it)
{
if (*it == '\t')
{
if (it != atom_it->begin)
atom_it = display_buffer.split(atom_it, it) + 1;
if (it+1 != atom_it->end)
atom_it = display_buffer.split(atom_it, it+1);
BufferCoord pos = it.buffer().line_and_column_at(it);
int count = tabstop - (pos.column % tabstop);
atom_it->replacement_text = std::string(count, ' ');
}
}
}
}
}

2
src/filters.hh
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@ -11,6 +11,8 @@ void colorize_regex(DisplayBuffer& display_buffer,
const boost::regex& ex, Color color);
void colorize_cplusplus(DisplayBuffer& display_buffer);
void colorize_cplusplus(DisplayBuffer& display_buffer);
void expand_tabulations(DisplayBuffer& display_buffer);
}

3
src/main.cc
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@ -85,7 +85,8 @@ void draw_window(Window& window)
WindowCoord position;
for (const DisplayAtom& atom : window.display_buffer())
{
const std::string content = window.buffer().string(atom.begin, atom.end);
const std::string content = atom.replacement_text.empty() ?
window.buffer().string(atom.begin, atom.end) : atom.replacement_text;
set_attribute(A_UNDERLINE, atom.attribute & Underline);
set_attribute(A_REVERSE, atom.attribute & Reverse);

1
src/window.cc
View File

@ -112,6 +112,7 @@ Window::Window(Buffer& buffer)
{
m_selections.push_back(Selection(buffer.begin(), buffer.begin()));
m_filters.push_back(colorize_cplusplus);
m_filters.push_back(expand_tabulations);
m_filters.push_back(HighlightSelections(*this));
}