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Use a BufferedWriter to output in the terminal ui instead of stdio

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Clearer control of buffering and flushing
This commit is contained in:
Maxime Coste 2021-07-31 09:45:36 +10:00
parent 1728274803
commit 1b7616b3fc
3 changed files with 79 additions and 74 deletions
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13
src/file.hh
View File

@ -131,7 +131,7 @@ struct BufferedWriter
~BufferedWriter() noexcept(false)
{
if (m_pos != 0 and m_exception_count == std::uncaught_exceptions())
Kakoune::write(m_fd, {m_buffer, m_pos});
flush();
}
void write(StringView data)
@ -143,14 +143,17 @@ struct BufferedWriter
memcpy(m_buffer + (int)m_pos, data.data(), (int)write_len);
m_pos += write_len;
if (m_pos == size)
{
Kakoune::write(m_fd, {m_buffer, size});
m_pos = 0;
}
flush();
data = data.substr(write_len);
}
}
void flush()
{
Kakoune::write(m_fd, {m_buffer, m_pos});
m_pos = 0;
}
private:
static constexpr ByteCount size = buffer_size;
int m_fd;

135
src/terminal_ui.cc
View File

@ -13,7 +13,6 @@
#include <fcntl.h>
#include <csignal>
#include <stdio.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <strings.h>
@ -190,32 +189,44 @@ void TerminalUI::Window::draw(DisplayCoord pos,
lines[(int)pos.line].append({}, size.column - pos.column, default_face);
}
void TerminalUI::Screen::set_face(const Face& face)
struct Writer : BufferedWriter<>
{
using Writer::BufferedWriter::BufferedWriter;
~Writer() noexcept(false) = default;
};
template<typename... Args>
static void format_with(Writer& writer, StringView format, Args&&... args)
{
format_with([&](StringView s) { writer.write(s); }, format, std::forward<Args>(args)...);
}
void TerminalUI::Screen::set_face(const Face& face, Writer& writer)
{
static constexpr int fg_table[]{ 39, 30, 31, 32, 33, 34, 35, 36, 37, 90, 91, 92, 93, 94, 95, 96, 97 };
static constexpr int bg_table[]{ 49, 40, 41, 42, 43, 44, 45, 46, 47, 100, 101, 102, 103, 104, 105, 106, 107 };
static constexpr int attr_table[]{ 0, 4, 7, 5, 1, 2, 3, 9 };
auto set_color = [](bool fg, const Color& color, bool join) {
auto set_color = [&](bool fg, const Color& color, bool join) {
if (join)
fputs(";", stdout);
writer.write(";");
if (color.isRGB())
printf("%d;2;%d;%d;%d", fg ? 38 : 48, color.r, color.g, color.b);
format_with(writer, "{};2;{};{};{}", fg ? 38 : 48, color.r, color.g, color.b);
else
printf("%d", (fg ? fg_table : bg_table)[(int)(char)color.color]);
format_with(writer, "{}", (fg ? fg_table : bg_table)[(int)(char)color.color]);
};
if (m_active_face == face)
return;
fputs("\033[", stdout);
writer.write("\033[");
bool join = false;
if (face.attributes != m_active_face.attributes)
{
for (int i = 0; i < std::size(attr_table); ++i)
{
if (face.attributes & (Attribute)(1 << i))
printf(";%d", attr_table[i]);
format_with(writer, ";{}", attr_table[i]);
}
m_active_face = Face{{}, {}, face.attributes};
join = true;
@ -227,24 +238,24 @@ void TerminalUI::Screen::set_face(const Face& face)
}
if (m_active_face.bg != face.bg)
set_color(false, face.bg, join);
fputs("m", stdout);
writer.write("m");
m_active_face = face;
}
void TerminalUI::Screen::output(bool force, bool synchronized)
void TerminalUI::Screen::output(bool force, bool synchronized, Writer& writer)
{
if (lines.empty())
return;
// iTerm2 "begin synchronized update" sequence
if (synchronized)
printf("\033P=1s\033\\");
writer.write("\033P=1s\033\\");
if (force)
{
hashes.clear();
printf("\033[m");
writer.write("\033[m");
m_active_face = Face{};
}
@ -275,7 +286,7 @@ void TerminalUI::Screen::output(bool force, bool synchronized)
line += change.keep;
if (int del = change.del - change.add; del > 0)
{
printf("\033[%dH\033[%dM", line + 1, del);
format_with(writer, "\033[{}H\033[{}M", line + 1, del);
line -= del;
}
line += change.del;
@ -288,9 +299,9 @@ void TerminalUI::Screen::output(bool force, bool synchronized)
for (int i = 0; i < change.add; ++i)
{
if (int add = change.add - change.del; i == 0 and add > 0)
printf("\033[%dH\033[%dL", line + 1, add);
format_with(writer, "\033[{}H\033[{}L", line + 1, add);
else
printf("\033[%dH", line + 1);
format_with(writer, "\033[{}H", line + 1);
ColumnCount pending_move = 0;
for (auto& [text, skip, face] : lines[line++].atoms)
@ -300,25 +311,25 @@ void TerminalUI::Screen::output(bool force, bool synchronized)
if (pending_move != 0)
{
printf("\033[%dC", (int)pending_move);
format_with(writer, "\033[{}C", (int)pending_move);
pending_move = 0;
}
set_face(face);
fputs(text.c_str(), stdout);
set_face(face, writer);
writer.write(text.c_str());
if (skip > 3 and face.attributes == Attribute{})
{
fputs("\033[K", stdout);
writer.write("\033[K");
pending_move = skip;
}
else if (skip > 0)
fputs(String{' ', skip}.c_str(), stdout);
writer.write(String{' ', skip}.c_str());
}
}
}
// iTerm2 "end synchronized update" sequence
if (synchronized)
printf("\033P=2s\033\\");
writer.write("\033P=2s\033\\");
}
constexpr int TerminalUI::default_shift_function_key;
@ -463,10 +474,11 @@ void TerminalUI::redraw(bool force)
m_info.blit(m_screen);
m_screen.output(force, m_synchronized);
Writer writer{STDOUT_FILENO};
m_screen.output(force, m_synchronized, writer);
auto set_cursor_pos = [](DisplayCoord c) {
printf("\033[%d;%dH", (int)c.line + 1, (int)c.column + 1);
auto set_cursor_pos = [&](DisplayCoord c) {
format_with(writer, "\033[{};{}H", (int)c.line + 1, (int)c.column + 1);
};
if (m_cursor.mode == CursorMode::Prompt)
set_cursor_pos({m_status_on_top ? 0 : m_dimensions.line, m_cursor.coord.column});
@ -540,22 +552,17 @@ void TerminalUI::draw_status(const DisplayLine& status_line,
if (m_set_title)
{
Writer writer{STDOUT_FILENO};
constexpr char suffix[] = " - Kakoune\007";
char buf[4 + 511 + 2] = "\033]2;";
writer.write("\033]2;");
// Fill title escape sequence buffer, removing non ascii characters
auto buf_it = &buf[4], buf_end = &buf[4 + 511 - (sizeof(suffix) - 2)];
for (auto& atom : mode_line)
{
const auto str = atom.content();
for (auto it = str.begin(), end = str.end();
it != end and buf_it != buf_end; utf8::to_next(it, end))
*buf_it++ = (*it >= 0x20 and *it <= 0x7e) ? *it : '?';
for (auto it = str.begin(), end = str.end(); it != end; utf8::to_next(it, end))
writer.write((*it >= 0x20 and *it <= 0x7e) ? *it : '?');
}
for (auto c : suffix)
*buf_it++ = c;
fputs(buf, stdout);
fflush(stdout);
writer.write(suffix);
}
m_dirty = true;
@ -1333,33 +1340,27 @@ void TerminalUI::set_resize_pending()
void TerminalUI::setup_terminal()
{
// enable alternative screen buffer
fputs("\033[?1049h", stdout);
// enable focus notify
fputs("\033[?1004h", stdout);
// request CSI u style key reporting
fputs("\033[>4;1m", stdout);
// save the current window title
fputs("\033[22t", stdout);
// hide cursor
fputs("\033[?25l", stdout);
// set application keypad mode, so the keypad keys send unique codes
fputs("\033=", stdout);
fflush(stdout);
write(STDOUT_FILENO,
"\033[?1049h" // enable alternative screen buffer
"\033[?1004h" // enable focus notify
"\033[>4;1m" // request CSI u style key reporting
"\033[22t" // save the current window title
"\033[?25l" // hide cursor
"\033=" // set application keypad mode, so the keypad keys send unique codes
);
}
void TerminalUI::restore_terminal()
{
fputs("\033>", stdout);
fputs("\033[?25h", stdout);
fputs("\033[23t", stdout);
fputs("\033[>4;0m", stdout);
fputs("\033[?1004l", stdout);
fputs("\033[?1049l", stdout);
// set the terminal output back to default colours and style
fputs("\033[m", stdout);
fflush(stdout);
write(STDOUT_FILENO,
"\033>"
"\033[?25h"
"\033[23t"
"\033[>4;0m"
"\033[?1004l"
"\033[?1049l"
"\033[m" // set the terminal output back to default colours and style
);
}
void TerminalUI::enable_mouse(bool enabled)
@ -1370,20 +1371,20 @@ void TerminalUI::enable_mouse(bool enabled)
m_mouse_enabled = enabled;
if (enabled)
{
// force SGR mode
fputs("\033[?1006h", stdout);
// enable mouse
fputs("\033[?1000h", stdout);
// force enable report mouse position
fputs("\033[?1002h", stdout);
write(STDOUT_FILENO,
"\033[?1006h" // force SGR mode
"\033[?1000h" // enable mouse
"\033[?1002h" // force enable report mouse position
);
}
else
{
fputs("\033[?1002l", stdout);
fputs("\033[?1000l", stdout);
fputs("\033[?1006l", stdout);
write(STDOUT_FILENO,
"\033[?1002l"
"\033[?1000l"
"\033[?1006l"
);
}
fflush(stdout);
}
void TerminalUI::set_ui_options(const Options& options)

5
src/terminal_ui.hh
View File

@ -17,6 +17,7 @@ namespace Kakoune
{
struct DisplayAtom;
struct Writer;
class TerminalUI : public UserInterface, public Singleton<TerminalUI>
{
@ -88,8 +89,8 @@ private:
struct Screen : Window
{
void output(bool force, bool synchronized);
void set_face(const Face& face);
void output(bool force, bool synchronized, Writer& writer);
void set_face(const Face& face, Writer& writer);
Vector<size_t> hashes;
Face m_active_face;