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Refactor NCursesUI::Window to reduce the exposed methods

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This should make an alternate implementation simpler as less state
has to be tracked.
This commit is contained in:
Maxime Coste 2019-09-16 23:01:13 +10:00
parent 9c2d2ad694
commit f855deaf8b
2 changed files with 65 additions and 102 deletions
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148
src/ncurses_ui.cc
View File

@ -66,48 +66,14 @@ void NCursesUI::Window::move_cursor(DisplayCoord coord)
wmove(win, (int)coord.line, (int)coord.column);
}
void NCursesUI::Window::add_str(StringView str)
{
waddnstr(win, str.begin(), (int)str.length());
}
void NCursesUI::Window::clear_to_end_of_line()
{
wclrtoeol(win);
}
void NCursesUI::Window::draw_line(Palette& palette,
const DisplayLine& line,
ColumnCount col_index,
ColumnCount max_column,
ColumnCount width,
const Face& default_face)
{
for (const DisplayAtom& atom : line)
{
set_face(palette, atom.face, default_face);
auto add_str = [&](StringView str) { waddnstr(win, str.begin(), (int)str.length()); };
StringView content = atom.content();
if (content.empty())
continue;
const auto remaining_columns = max_column - col_index;
if (content.back() == '\n' and
content.column_length() - 1 < remaining_columns)
{
add_str(content.substr(0, content.length()-1));
waddch(win, ' ');
}
else
{
content = content.substr(0_col, remaining_columns);
add_str(content);
col_index += content.column_length();
}
}
}
void NCursesUI::Window::set_face(Palette& palette, Face face, const Face& default_face)
{
auto set_face = [&](Face face) {
if (m_active_pair != -1)
wattroff(win, COLOR_PAIR(m_active_pair));
@ -131,6 +97,34 @@ void NCursesUI::Window::set_face(Palette& palette, Face face, const Face& defaul
#if defined(A_ITALIC)
set_attribute(Attribute::Italic, A_ITALIC);
#endif
};
wbkgdset(win, COLOR_PAIR(palette.get_color_pair(default_face)));
ColumnCount column = 0;
for (const DisplayAtom& atom : line)
{
set_face(atom.face);
StringView content = atom.content();
if (content.empty())
continue;
const auto remaining_columns = width - column;
if (content.back() == '\n' and
content.column_length() - 1 < remaining_columns)
{
add_str(content.substr(0, content.length()-1));
waddch(win, ' ');
}
else
{
content = content.substr(0_col, remaining_columns);
add_str(content);
column += content.column_length();
}
}
if (column < width)
wclrtoeol(win);
}
void NCursesUI::Window::mark_dirty(LineCount pos, LineCount count)
@ -138,11 +132,6 @@ void NCursesUI::Window::mark_dirty(LineCount pos, LineCount count)
wredrawln(win, (int)pos, (int)count);
}
void NCursesUI::Window::set_background_color(Palette& palette, Face face)
{
wbkgdset(win, COLOR_PAIR(palette.get_color_pair(face)));
}
constexpr int NCursesUI::default_shift_function_key;
static constexpr StringView assistant_cat[] =
@ -468,8 +457,6 @@ void NCursesUI::draw(const DisplayBuffer& display_buffer,
const Face& default_face,
const Face& padding_face)
{
m_window.set_background_color(m_palette, default_face);
check_resize();
const DisplayCoord dim = dimensions();
@ -478,19 +465,16 @@ void NCursesUI::draw(const DisplayBuffer& display_buffer,
for (const DisplayLine& line : display_buffer.lines())
{
m_window.move_cursor(line_index);
m_window.clear_to_end_of_line();
m_window.draw_line(m_palette, line, 0, dim.column, default_face);
m_window.draw_line(m_palette, line, dim.column, default_face);
++line_index;
}
m_window.set_background_color(m_palette, padding_face);
m_window.set_face(m_palette, padding_face, default_face);
auto face = merge_faces(default_face, padding_face);
DisplayLine line("~", {});
while (line_index < dim.line + line_offset)
{
m_window.move_cursor(line_index++);
m_window.clear_to_end_of_line();
m_window.add_str('~');
m_window.draw_line(m_palette, line, dim.column, face);
}
m_dirty = true;
@ -503,10 +487,7 @@ void NCursesUI::draw_status(const DisplayLine& status_line,
const LineCount status_line_pos = m_status_on_top ? 0 : m_dimensions.line;
m_window.move_cursor(status_line_pos);
m_window.set_background_color(m_palette, default_face);
m_window.clear_to_end_of_line();
m_window.draw_line(m_palette, status_line, 0, m_dimensions.column, default_face);
m_window.draw_line(m_palette, status_line, m_dimensions.column, default_face);
const auto mode_len = mode_line.length();
m_status_len = status_line.length();
@ -515,7 +496,7 @@ void NCursesUI::draw_status(const DisplayLine& status_line,
{
ColumnCount col = m_dimensions.column - mode_len;
m_window.move_cursor({status_line_pos, col});
m_window.draw_line(m_palette, mode_line, col, m_dimensions.column, default_face);
m_window.draw_line(m_palette, mode_line, m_dimensions.column - col, default_face);
}
else if (remaining > 2)
{
@ -526,7 +507,7 @@ void NCursesUI::draw_status(const DisplayLine& status_line,
ColumnCount col = m_dimensions.column - remaining + 1;
m_window.move_cursor({status_line_pos, col});
m_window.draw_line(m_palette, trimmed_mode_line, col, m_dimensions.column, default_face);
m_window.draw_line(m_palette, trimmed_mode_line, m_dimensions.column - col, default_face);
}
if (m_set_title)
@ -814,9 +795,6 @@ void NCursesUI::draw_menu()
if (not m_menu)
return;
m_menu.set_face(m_palette, m_menu.bg, {});
m_menu.set_background_color(m_palette, m_menu.bg);
const int item_count = (int)m_menu.items.size();
if (m_menu.columns == 0)
{
@ -825,30 +803,24 @@ void NCursesUI::draw_menu()
ColumnCount pos = 0;
m_menu.move_cursor({0, 0});
m_menu.add_str(m_menu.first_item > 0 ? "< " : " ");
m_menu.draw_line(m_palette, DisplayLine(m_menu.first_item > 0 ? "< " : " ", {}),
m_menu.size.column, m_menu.bg);
int i = m_menu.first_item;
for (; i < item_count and pos < win_width; ++i)
{
const DisplayLine& item = m_menu.items[i];
const ColumnCount item_width = item.length();
m_menu.draw_line(m_palette, item, 0, win_width - pos,
i == m_menu.selected_item ? m_menu.fg : m_menu.bg);
if (item_width > win_width - pos)
m_menu.add_str("…");
else
{
m_menu.set_face(m_palette, m_menu.bg, {});
m_menu.add_str(String{" "});
}
auto& face = i == m_menu.selected_item ? m_menu.fg : m_menu.bg;
m_menu.draw_line(m_palette, item, win_width - pos, face);
m_menu.draw_line(m_palette, DisplayLine(item_width > win_width - pos ? "…" : " ", {}),
win_width - pos - item_width, m_menu.bg);
pos += item_width + 1;
}
m_menu.set_face(m_palette, m_menu.bg, {});
if (pos <= win_width)
m_menu.add_str(String{' ', win_width - pos + 1});
m_menu.add_str(i == item_count ? " " : ">");
auto end_str = String{' ', pos > win_width ? 0 : win_width - pos + 1} + (i == item_count ? " " : ">");
m_menu.draw_line(m_palette, DisplayLine(end_str, {}), m_menu.size.column - pos, m_menu.bg);
m_dirty = true;
return;
}
@ -873,21 +845,19 @@ void NCursesUI::draw_menu()
for (int col = 0; col < m_menu.columns; ++col)
{
int item_idx = (first_col + col) * (int)m_menu.size.line + (int)line;
if (item_idx >= item_count)
continue;
auto& face = item_idx < item_count and item_idx == m_menu.selected_item ? m_menu.fg : m_menu.bg;
ColumnCount column = 0;
if (item_idx < item_count)
{
const DisplayLine& item = m_menu.items[item_idx];
m_menu.draw_line(m_palette, item, 0, column_width,
item_idx == m_menu.selected_item ? m_menu.fg : m_menu.bg);
const ColumnCount pad = column_width - item.length();
m_menu.add_str(String{' ', pad});
m_menu.draw_line(m_palette, item, column_width, face);
column = item.length();
}
const bool is_mark = line >= mark_line and
line < mark_line + mark_height;
m_menu.clear_to_end_of_line();
m_menu.draw_line(m_palette, DisplayLine(String{' ', column_width - column}, {}), column_width - column, face);
}
const bool is_mark = line >= mark_line and line < mark_line + mark_height;
m_menu.move_cursor({line, m_menu.size.column - 1});
m_menu.set_face(m_palette, m_menu.bg, {});
m_menu.add_str(is_mark ? "█" : "░");
m_menu.draw_line(m_palette, DisplayLine(is_mark ? "█" : "░", {}), 1, m_menu.bg);
}
m_dirty = true;
}
@ -1212,12 +1182,10 @@ void NCursesUI::info_show(StringView title, StringView content,
m_info.create(anchor, info_box.size);
m_info.set_background_color(m_palette, face);
for (auto line = 0_line; line < info_box.size.line; ++line)
{
m_info.move_cursor(line);
m_info.clear_to_end_of_line();
m_info.add_str(info_box.contents[(int)line]);
m_info.draw_line(m_palette, DisplayLine(info_box.contents[(int)line], {}), info_box.size.column, face);
}
m_dirty = true;
}

7
src/ncurses_ui.hh
View File

@ -103,13 +103,8 @@ private:
void mark_dirty(LineCount pos, LineCount count);
void draw_line(Palette& palette,
const DisplayLine& line,
ColumnCount col_index,
ColumnCount max_column,
ColumnCount width,
const Face& default_face);
void add_str(StringView str);
void clear_to_end_of_line();
void set_face(Palette& palette, Face face, const Face& default_face);
void set_background_color(Palette& palette, Face face);
explicit operator bool() const { return win; }