home/src/window.cc
2018-10-06 10:44:56 +10:00

365 lines
12 KiB
C++

#include "window.hh"
#include "assert.hh"
#include "clock.hh"
#include "context.hh"
#include "highlighter.hh"
#include "hook_manager.hh"
#include "input_handler.hh"
#include "client.hh"
#include "buffer_utils.hh"
#include "option.hh"
#include "option_types.hh"
#include <algorithm>
#include <sstream>
namespace Kakoune
{
// Implementation in highlighters.cc
void setup_builtin_highlighters(HighlighterGroup& group);
Window::Window(Buffer& buffer)
: Scope(buffer),
m_buffer(&buffer),
m_builtin_highlighters{highlighters()}
{
run_hook_in_own_context("WinCreate", buffer.name());
options().register_watcher(*this);
setup_builtin_highlighters(m_builtin_highlighters.group());
// gather as on_option_changed can mutate the option managers
for (auto& option : options().flatten_options()
| transform([](auto& ptr) { return ptr.get(); })
| gather<Vector<const Option*>>())
on_option_changed(*option);
}
Window::~Window()
{
run_hook_in_own_context("WinClose", buffer().name());
options().unregister_watcher(*this);
}
void Window::scroll(LineCount offset)
{
m_position.line = std::max(0_line, m_position.line + offset);
}
void Window::display_line_at(LineCount buffer_line, LineCount display_line)
{
if (display_line >= 0 or display_line < m_dimensions.line)
m_position.line = std::max(0_line, buffer_line - display_line);
}
void Window::center_line(LineCount buffer_line)
{
display_line_at(buffer_line, m_dimensions.line/2_line);
}
void Window::scroll(ColumnCount offset)
{
m_position.column = std::max(0_col, m_position.column + offset);
}
void Window::display_column_at(ColumnCount buffer_column, ColumnCount display_column)
{
if (display_column >= 0 or display_column < m_dimensions.column)
m_position.column = std::max(0_col, buffer_column - display_column);
}
void Window::center_column(ColumnCount buffer_column)
{
display_column_at(buffer_column, m_dimensions.column/2_col);
}
static uint32_t compute_faces_hash(const FaceRegistry& faces)
{
uint32_t hash = 0;
for (auto&& face : faces.flatten_faces() | transform(&FaceRegistry::FaceMap::Item::value))
hash = combine_hash(hash, face.alias.empty() ? hash_value(face.face) : hash_value(face.alias));
return hash;
}
Window::Setup Window::build_setup(const Context& context) const
{
Vector<BufferRange, MemoryDomain::Display> selections;
for (auto& sel : context.selections())
selections.push_back({sel.cursor(), sel.anchor()});
return { m_position, m_dimensions,
context.buffer().timestamp(),
compute_faces_hash(context.faces()),
context.selections().main_index(),
std::move(selections) };
}
bool Window::needs_redraw(const Context& context) const
{
auto& selections = context.selections();
if (m_position != m_last_setup.position or
m_dimensions != m_last_setup.dimensions or
context.buffer().timestamp() != m_last_setup.timestamp or
selections.main_index() != m_last_setup.main_selection or
selections.size() != m_last_setup.selections.size() or
compute_faces_hash(context.faces()) != m_last_setup.faces_hash)
return true;
for (int i = 0; i < selections.size(); ++i)
{
if (selections[i].cursor() != m_last_setup.selections[i].begin or
selections[i].anchor() != m_last_setup.selections[i].end)
return true;
}
return false;
}
const DisplayBuffer& Window::update_display_buffer(const Context& context)
{
const bool profile = context.options()["debug"].get<DebugFlags>() &
DebugFlags::Profile;
auto start_time = profile ? Clock::now() : Clock::time_point{};
if (m_display_buffer.timestamp() != -1)
{
for (auto&& change : buffer().changes_since(m_display_buffer.timestamp()))
{
if (change.type == Buffer::Change::Insert and change.begin.line < m_position.line)
m_position.line += change.end.line - change.begin.line;
if (change.type == Buffer::Change::Erase and change.begin.line < m_position.line)
m_position.line = std::max(m_position.line - (change.end.line - change.begin.line), change.begin.line);
}
}
DisplayBuffer::LineList& lines = m_display_buffer.lines();
m_display_buffer.set_timestamp(buffer().timestamp());
lines.clear();
if (m_dimensions == DisplayCoord{0,0})
return m_display_buffer;
kak_assert(&buffer() == &context.buffer());
const DisplaySetup setup = compute_display_setup(context);
const int tabstop = context.options()["tabstop"].get<int>();
for (LineCount line = 0; line < setup.window_range.line; ++line)
{
LineCount buffer_line = setup.window_pos.line + line;
if (buffer_line >= buffer().line_count())
break;
auto beg_byte = get_byte_to_column(buffer(), tabstop, {buffer_line, setup.window_pos.column});
auto end_byte = setup.full_lines ?
buffer()[buffer_line].length()
: get_byte_to_column(buffer(), tabstop, {buffer_line, setup.window_pos.column + setup.window_range.column});
// The display buffer always has at least one buffer atom, which might be empty if
// beg_byte == end_byte
lines.emplace_back(AtomList{ {buffer(), {buffer_line, beg_byte}, {buffer_line, end_byte}} });
}
m_display_buffer.compute_range();
const BufferRange range{{0,0}, buffer().end_coord()};
for (auto pass : { HighlightPass::Wrap, HighlightPass::Move, HighlightPass::Colorize })
m_builtin_highlighters.highlight({context, setup, pass, {}}, m_display_buffer, range);
m_display_buffer.optimize();
m_last_setup = build_setup(context);
set_position(setup.window_pos);
if (profile and not (buffer().flags() & Buffer::Flags::Debug))
{
using namespace std::chrono;
auto duration = duration_cast<microseconds>(Clock::now() - start_time);
write_to_debug_buffer(format("window display update for '{}' took {} us",
buffer().display_name(), (size_t)duration.count()));
}
return m_display_buffer;
}
void Window::set_position(DisplayCoord position)
{
m_position.line = clamp(position.line, 0_line, buffer().line_count()-1);
m_position.column = std::max(0_col, position.column);
}
void Window::set_dimensions(DisplayCoord dimensions)
{
if (m_dimensions != dimensions)
{
m_dimensions = dimensions;
run_hook_in_own_context("WinResize", format("{}.{}", dimensions.line,
dimensions.column));
}
}
static void check_display_setup(const DisplaySetup& setup, const Window& window)
{
kak_assert(setup.window_pos.line >= 0 and setup.window_pos.line < window.buffer().line_count());
kak_assert(setup.window_pos.column >= 0);
kak_assert(setup.window_range.column >= 0);
kak_assert(setup.window_range.line >= 0);
}
DisplaySetup Window::compute_display_setup(const Context& context) const
{
auto win_pos = m_position;
DisplayCoord offset = options()["scrolloff"].get<DisplayCoord>();
offset.line = std::min(offset.line, (m_dimensions.line + 1) / 2);
offset.column = std::min(offset.column, (m_dimensions.column + 1) / 2);
const int tabstop = context.options()["tabstop"].get<int>();
const auto& cursor = context.selections().main().cursor();
// Ensure cursor line is visible
if (cursor.line - offset.line < win_pos.line)
win_pos.line = std::max(0_line, cursor.line - offset.line);
if (cursor.line + offset.line >= win_pos.line + m_dimensions.line)
win_pos.line = std::min(buffer().line_count()-1, cursor.line + offset.line - m_dimensions.line + 1);
DisplaySetup setup{
win_pos,
m_dimensions,
{cursor.line - win_pos.line,
get_column(buffer(), tabstop, cursor) - win_pos.column},
offset,
false
};
for (auto pass : { HighlightPass::Move, HighlightPass::Wrap })
m_builtin_highlighters.compute_display_setup({context, setup, pass, {}}, setup);
check_display_setup(setup, *this);
// now ensure the cursor column is visible
{
auto underflow = std::max(-setup.window_pos.column,
setup.cursor_pos.column - setup.scroll_offset.column);
if (underflow < 0)
{
setup.window_pos.column += underflow;
setup.cursor_pos.column -= underflow;
}
auto overflow = setup.cursor_pos.column + setup.scroll_offset.column - setup.window_range.column + 1;
if (overflow > 0)
{
setup.window_pos.column += overflow;
setup.cursor_pos.column -= overflow;
}
check_display_setup(setup, *this);
}
return setup;
}
namespace
{
ColumnCount find_display_column(const DisplayLine& line, const Buffer& buffer,
BufferCoord coord)
{
ColumnCount column = 0;
for (auto& atom : line)
{
if (atom.has_buffer_range() and
coord >= atom.begin() and coord < atom.end())
{
if (atom.type() == DisplayAtom::Range)
column += utf8::column_distance(get_iterator(buffer, atom.begin()),
get_iterator(buffer, coord));
return column;
}
column += atom.length();
}
return column;
}
BufferCoord find_buffer_coord(const DisplayLine& line, const Buffer& buffer,
ColumnCount column)
{
auto& range = line.range();
for (auto& atom : line)
{
ColumnCount len = atom.length();
if (atom.has_buffer_range() and column < len)
{
if (atom.type() == DisplayAtom::Range)
return buffer.clamp(
utf8::advance(get_iterator(buffer, atom.begin()),
get_iterator(buffer, range.end),
std::max(0_col, column)).coord());
return buffer.clamp(atom.begin());
}
column -= len;
}
return range.end == BufferCoord{0,0} ?
range.end : buffer.prev(range.end);
}
}
Optional<DisplayCoord> Window::display_position(BufferCoord coord) const
{
if (m_display_buffer.timestamp() != buffer().timestamp())
return {};
LineCount l = 0;
for (auto& line : m_display_buffer.lines())
{
auto& range = line.range();
if (range.begin <= coord and coord < range.end)
return DisplayCoord{l, find_display_column(line, buffer(), coord)};
++l;
}
return {};
}
BufferCoord Window::buffer_coord(DisplayCoord coord) const
{
if (m_display_buffer.timestamp() != buffer().timestamp() or
m_display_buffer.lines().empty())
return {0, 0};
if (coord <= 0_line)
coord = {0,0};
if ((size_t)coord.line >= m_display_buffer.lines().size())
coord = DisplayCoord{(int)m_display_buffer.lines().size()-1, INT_MAX};
return find_buffer_coord(m_display_buffer.lines()[(int)coord.line],
buffer(), coord.column);
}
void Window::clear_display_buffer()
{
m_display_buffer = DisplayBuffer{};
}
void Window::on_option_changed(const Option& option)
{
run_hook_in_own_context("WinSetOption", format("{}={}", option.name(),
option.get_as_string(Quoting::Kakoune)));
// an highlighter might depend on the option, so we need to redraw
force_redraw();
}
void Window::run_hook_in_own_context(StringView hook_name, StringView param,
String client_name)
{
if (m_buffer->flags() & Buffer::Flags::NoHooks)
return;
InputHandler hook_handler{{ *m_buffer, Selection{} },
Context::Flags::Draft,
std::move(client_name)};
hook_handler.context().set_window(*this);
if (m_client)
hook_handler.context().set_client(*m_client);
hooks().run_hook(hook_name, param, hook_handler.context());
}
}