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Add a basic replace-ranges highlighter

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replace-ranges is takes a range-faces option, but treats the face
string as a display line to be parsed, and replaces the range display
with this display line.
This commit is contained in:
Maxime Coste 2017-05-09 10:53:27 +01:00
parent 468bd63569
commit 44d2db2706
1 changed files with 114 additions and 21 deletions
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135
src/highlighters.cc
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@ -64,10 +64,8 @@ void highlight_range(DisplayBuffer& display_buffer,
bool is_replaced = atom_it->type() == DisplayAtom::ReplacedRange;
if (not atom_it->has_buffer_range() or
(skip_replaced and is_replaced))
continue;
if (end <= atom_it->begin() or begin >= atom_it->end())
(skip_replaced and is_replaced) or
end <= atom_it->begin() or begin >= atom_it->end())
continue;
if (not is_replaced and begin > atom_it->begin())
@ -85,6 +83,47 @@ void highlight_range(DisplayBuffer& display_buffer,
}
}
template<typename T>
void replace_range(DisplayBuffer& display_buffer,
BufferCoord begin, BufferCoord end, T func)
{
// tolerate begin > end as that can be triggered by wrong encodngs
if (begin >= end or end <= display_buffer.range().begin
or begin >= display_buffer.range().end)
return;
for (auto& line : display_buffer.lines())
{
auto& range = line.range();
if (range.end <= begin or end < range.begin)
continue;
int beg_idx = -1, end_idx = -1;
for (auto atom_it = line.begin(); atom_it != line.end(); ++atom_it)
{
if (not atom_it->has_buffer_range() or
end <= atom_it->begin() or begin >= atom_it->end())
continue;
if (begin >= atom_it->begin())
{
if (begin > atom_it->begin())
atom_it = ++line.split(atom_it, begin);
beg_idx = atom_it - line.begin();
}
if (end <= atom_it->end())
{
if (end < atom_it->end())
atom_it = line.split(atom_it, end);
end_idx = (atom_it - line.begin()) + 1;
}
}
if (beg_idx != -1 and end_idx != -1)
func(line, beg_idx, end_idx);
}
}
void apply_highlighter(const Context& context,
DisplayBuffer& display_buffer,
HighlightPass pass,
@ -1309,6 +1348,31 @@ void option_from_string(StringView str, InclusiveBufferRange& opt)
BufferCoord& get_first(RangeAndFace& r) { return std::get<0>(r).first; }
BufferCoord& get_last(RangeAndFace& r) { return std::get<0>(r).last; }
static void update_ranges_ifn(const Buffer& buffer, TimestampedList<RangeAndFace>& range_and_faces)
{
if (range_and_faces.prefix == buffer.timestamp())
return;
auto changes = buffer.changes_since(range_and_faces.prefix);
for (auto change_it = changes.begin(); change_it != changes.end(); )
{
auto forward_end = forward_sorted_until(change_it, changes.end());
auto backward_end = backward_sorted_until(change_it, changes.end());
if (forward_end >= backward_end)
{
update_forward({ change_it, forward_end }, range_and_faces.list);
change_it = forward_end;
}
else
{
update_backward({ change_it, backward_end }, range_and_faces.list);
change_it = backward_end;
}
}
range_and_faces.prefix = buffer.timestamp();
}
struct RangesHighlighter : Highlighter
{
RangesHighlighter(String option_name)
@ -1348,29 +1412,53 @@ private:
}
}
void update_ranges_ifn(const Buffer& buffer, TimestampedList<RangeAndFace>& range_and_faces)
const String m_option_name;
};
struct ReplaceRangesHighlighter : Highlighter
{
ReplaceRangesHighlighter(String option_name)
: Highlighter{HighlightPass::Colorize}
, m_option_name{std::move(option_name)} {}
static HighlighterAndId create(HighlighterParameters params)
{
if (range_and_faces.prefix == buffer.timestamp())
return;
if (params.size() != 1)
throw runtime_error("wrong parameter count");
auto changes = buffer.changes_since(range_and_faces.prefix);
for (auto change_it = changes.begin(); change_it != changes.end(); )
const String& option_name = params[0];
// throw if wrong option type
GlobalScope::instance().options()[option_name].get<TimestampedList<RangeAndFace>>();
return {"replace_ranges_" + params[0], make_unique<ReplaceRangesHighlighter>(option_name)};
}
private:
void do_highlight(const Context& context, HighlightPass, DisplayBuffer& display_buffer, BufferRange) override
{
auto& buffer = context.buffer();
auto& range_and_faces = context.options()[m_option_name].get_mutable<TimestampedList<RangeAndFace>>();
update_ranges_ifn(buffer, range_and_faces);
for (auto& range : range_and_faces.list)
{
auto forward_end = forward_sorted_until(change_it, changes.end());
auto backward_end = backward_sorted_until(change_it, changes.end());
if (forward_end >= backward_end)
try
{
update_forward({ change_it, forward_end }, range_and_faces.list);
change_it = forward_end;
}
else
{
update_backward({ change_it, backward_end }, range_and_faces.list);
change_it = backward_end;
auto& r = std::get<0>(range);
if (buffer.is_valid(r.first) and buffer.is_valid(r.last))
{
auto replacement = parse_display_line(std::get<1>(range));
replace_range(display_buffer, r.first, buffer.char_next(r.last),
[&](DisplayLine& line, int beg_idx, int end_idx){
auto it = line.erase(line.begin() + beg_idx, line.begin() + end_idx);
for (auto& atom : replacement)
it = ++line.insert(it, std::move(atom));
});
}
}
catch (runtime_error&)
{}
}
range_and_faces.prefix = buffer.timestamp();
}
const String m_option_name;
@ -1886,6 +1974,11 @@ void register_highlighters()
{ RangesHighlighter::create,
"Parameters: <option name>\n"
"Use the range-faces option given as parameter to highlight buffer\n" } });
registry.insert({
"replace-ranges",
{ ReplaceRangesHighlighter::create,
"Parameters: <option name>\n"
"Use the range-faces option given as parameter to highlight buffer\n" } });
registry.insert({
"line",
{ create_line_highlighter,