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Add support for word wrapping with the -word switch to the wrap highlighter

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This commit is contained in:
Maxime Coste 2017-05-06 16:14:28 +01:00
parent bb17fb6dd3
commit 8dd808726d
1 changed files with 65 additions and 34 deletions
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99
src/highlighters.cc
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@ -647,13 +647,13 @@ HighlighterAndId create_column_highlighter(HighlighterParameters params)
struct WrapHighlighter : Highlighter
{
WrapHighlighter() : Highlighter{HighlightPass::Wrap} {}
WrapHighlighter(bool word_wrap) : Highlighter{HighlightPass::Wrap}, m_word_wrap{word_wrap} {}
void do_highlight(const Context& context, HighlightPass pass,
DisplayBuffer& display_buffer, BufferRange) override
{
ColumnCount column = context.window().display_setup().window_range.column;
if (column < 0)
ColumnCount wrap_column = context.window().display_setup().window_range.column;
if (wrap_column < 0)
return;
const Buffer& buffer = context.buffer();
@ -663,15 +663,9 @@ struct WrapHighlighter : Highlighter
it != display_buffer.lines().end(); ++it)
{
const LineCount buf_line = it->range().begin.line;
int line_split_count = 1;
const ByteCount line_length = buffer[buf_line].length();
auto get_coord = [&](ColumnCount c) {
auto col = get_byte_to_column(
buffer, tabstop, {buf_line, c});
return BufferCoord{buf_line, col};
};
auto coord = get_coord(column * line_split_count++);
auto coord = next_split_coord(buffer, wrap_column, tabstop, buf_line);
if (buffer.is_valid(coord) and not buffer.is_end(coord))
{
for (auto atom_it = it->begin();
@ -701,7 +695,7 @@ struct WrapHighlighter : Highlighter
}
it = display_buffer.lines().insert(it+1, new_line);
coord = get_coord(column * line_split_count++);
coord = next_split_coord(buffer, wrap_column, tabstop, coord);
atom_it = it->begin();
}
}
@ -710,16 +704,25 @@ struct WrapHighlighter : Highlighter
void do_compute_display_setup(const Context& context, HighlightPass, DisplaySetup& setup) override
{
ColumnCount column = setup.window_range.column;
if (column < 0)
ColumnCount wrap_column = setup.window_range.column;
if (wrap_column < 0)
return;
const Buffer& buffer = context.buffer();
const int tabstop = context.options()["tabstop"].get<int>();
auto line_wrap_count = [&](LineCount line) {
auto len = get_column(buffer, tabstop, {line, buffer[line].length()-1});
return LineCount{(int)(len / column)};
LineCount count = 0;
BufferCoord coord{line};
const ByteCount line_length = buffer[line].length();
while (true)
{
coord = next_split_coord(buffer, wrap_column, tabstop, coord);
if (coord.column == line_length)
break;
++count;
}
return count;
};
// Disable vertical scrolling when using a WrapHighlighter
@ -735,26 +738,29 @@ struct WrapHighlighter : Highlighter
if (buf_line >= buffer.line_count())
break;
// Place the cursor correctly after its line gets wrapped
if (win_line == setup.cursor_pos.line)
{
auto cursor_buffer_column = setup.window_pos.column + setup.cursor_pos.column;
setup.cursor_pos.line += (int)(cursor_buffer_column / column);
auto new_cursor_buffer_column = (cursor_buffer_column % column);
if (new_cursor_buffer_column < setup.window_pos.column + setup.scroll_offset.column)
setup.window_pos.column = new_cursor_buffer_column - setup.scroll_offset.column;
setup.cursor_pos.column = new_cursor_buffer_column - setup.window_pos.column;
kak_assert(setup.cursor_pos.column >= 0 and setup.cursor_pos.column < setup.window_range.column);
}
const auto wrap_count = line_wrap_count(buf_line);
setup.window_range.line -= wrap_count;
if (setup.cursor_pos.line > win_line)
if (win_line < setup.cursor_pos.line)
setup.cursor_pos.line += wrap_count;
// Place the cursor correctly after its line gets wrapped
else if (win_line == setup.cursor_pos.line)
{
auto cursor = context.selections().main().cursor();
BufferCoord coord{buf_line};
while (true)
{
auto split_coord = next_split_coord(buffer, wrap_column, tabstop, coord);
if (split_coord.column > cursor.column)
{
setup.cursor_pos.column = get_column(buffer, tabstop, cursor) - get_column(buffer, tabstop, coord);
break;
}
++setup.cursor_pos.line;
coord = split_coord;
}
kak_assert(setup.cursor_pos.column >= 0 and setup.cursor_pos.column < setup.window_range.column);
}
win_line += wrap_count + 1;
// scroll window to keep cursor visible, and update range as lines gets removed
@ -774,13 +780,38 @@ struct WrapHighlighter : Highlighter
}
}
BufferCoord next_split_coord(const Buffer& buffer, ColumnCount wrap_column, int tabstop, BufferCoord coord)
{
auto column = get_column(buffer, tabstop, coord);
auto col = get_byte_to_column(
buffer, tabstop, {coord.line, column + wrap_column});
BufferCoord split_coord{coord.line, col};
if (m_word_wrap)
{
StringView line = buffer[coord.line];
utf8::iterator<const char*> it{line.data() + (size_t)col, line};
while (it != line.end() and it != line.begin() and is_word(*it))
--it;
if (it != line.begin() and it != line.data() + (size_t)col)
split_coord.column = (it+1).base() - line.begin();
}
return split_coord;
};
static HighlighterAndId create(HighlighterParameters params)
{
if (params.size() != 0)
throw runtime_error("wrong parameter count");
static const ParameterDesc param_desc{
{ { "word", { false, "" } } },
ParameterDesc::Flags::None, 0, 0
};
ParametersParser parser(params, param_desc);
return {"wrap", make_unique<WrapHighlighter>()};
return {"wrap", make_unique<WrapHighlighter>((bool)parser.get_switch("word"))};
}
const bool m_word_wrap;
};
void expand_tabulations(const Context& context, HighlightPass, DisplayBuffer& display_buffer, BufferRange)