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