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Add an option to only highlight trailing whitespace

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This commit is contained in:
Clement Delafargue 2018-12-13 15:44:22 +01:00
parent d2f2c3d0c7
commit 55972a4b2a
1 changed files with 35 additions and 15 deletions
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28
src/highlighters.cc
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@ -958,9 +958,9 @@ struct TabulationHighlighter : Highlighter
struct ShowWhitespacesHighlighter : Highlighter
{
ShowWhitespacesHighlighter(String tab, String tabpad, String spc, String lf, String nbsp)
ShowWhitespacesHighlighter(String tab, String tabpad, String spc, String lf, String nbsp, bool only_trailing)
: Highlighter{HighlightPass::Move}, m_tab{std::move(tab)}, m_tabpad{std::move(tabpad)},
m_spc{std::move(spc)}, m_lf{std::move(lf)}, m_nbsp{std::move(nbsp)}
m_spc{std::move(spc)}, m_lf{std::move(lf)}, m_nbsp{std::move(nbsp)}, m_only_trailing{std::move(only_trailing)}
{}
static std::unique_ptr<Highlighter> create(HighlighterParameters params, Highlighter*)
@ -970,11 +970,13 @@ struct ShowWhitespacesHighlighter : Highlighter
{ "tabpad", { true, "" } },
{ "spc", { true, "" } },
{ "lf", { true, "" } },
{ "nbsp", { true, "" } } },
{ "nbsp", { true, "" } },
{ "only-trailing", { false, "" } } },
ParameterDesc::Flags::None, 0, 0
};
ParametersParser parser(params, param_desc);
bool only_trailing = (bool) parser.get_switch("only-trailing");
auto get_param = [&](StringView param, StringView fallback) {
StringView value = parser.get_switch(param).value_or(fallback);
if (value.char_length() != 1)
@ -984,7 +986,7 @@ struct ShowWhitespacesHighlighter : Highlighter
return std::make_unique<ShowWhitespacesHighlighter>(
get_param("tab", "→"), get_param("tabpad", " "), get_param("spc", "·"),
get_param("lf", "¬"), get_param("nbsp", "⍽"));
get_param("lf", "¬"), get_param("nbsp", "⍽"), only_trailing);
}
private:
@ -1003,17 +1005,33 @@ private:
auto begin = get_iterator(buffer, atom_it->begin());
auto end = get_iterator(buffer, atom_it->end());
auto last_non_space = begin.coord();
if(m_only_trailing)
{
for (BufferIterator it = begin; it != end; )
{
Codepoint cp = utf8::read_codepoint(it, end);
if (cp == '\t' or cp == ' ' or cp == '\n' or cp == 0xA0)
continue;
last_non_space = it.coord();
}
}
for (BufferIterator it = begin; it != end; )
{
auto coord = it.coord();
Codepoint cp = utf8::read_codepoint(it, end);
if (cp == '\t' or cp == ' ' or cp == '\n' or cp == 0xA0)
{
auto should_highlight = !m_only_trailing or it.coord() > last_non_space;
if (coord != begin.coord())
atom_it = ++line.split(atom_it, coord);
if (it != end)
atom_it = line.split(atom_it, it.coord());
if (should_highlight)
{
if (cp == '\t')
{
const ColumnCount column = get_column(buffer, tabstop, coord);
@ -1027,6 +1045,7 @@ private:
atom_it->replace(m_lf);
else if (cp == 0xA0)
atom_it->replace(m_nbsp);
}
atom_it->face = merge_faces(atom_it->face, whitespaceface);
break;
}
@ -1036,6 +1055,7 @@ private:
}
const String m_tab, m_tabpad, m_spc, m_lf, m_nbsp;
const bool m_only_trailing;
};
struct LineNumbersHighlighter : Highlighter