/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "TerminalWidget.h"
#include <AK/DeprecatedString.h>
#include <AK/LexicalPath.h>
#include <AK/StdLibExtras.h>
#include <AK/StringBuilder.h>
#include <AK/TemporaryChange.h>
#include <AK/Utf32View.h>
#include <AK/Utf8View.h>
#include <LibConfig/Client.h>
#include <LibCore/ConfigFile.h>
#include <LibCore/MimeData.h>
#include <LibDesktop/AppFile.h>
#include <LibDesktop/Launcher.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/Clipboard.h>
#include <LibGUI/DragOperation.h>
#include <LibGUI/Icon.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Scrollbar.h>
#include <LibGUI/Window.h>
#include <LibGfx/Font/Font.h>
#include <LibGfx/Font/FontDatabase.h>
#include <LibGfx/Palette.h>
#include <LibGfx/StylePainter.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
namespace VT {
void TerminalWidget::set_pty_master_fd(int fd)
{
m_ptm_fd = fd;
if (m_ptm_fd == -1) {
m_notifier = nullptr;
return;
}
m_notifier = Core::Notifier::construct(m_ptm_fd, Core::Notifier::Read);
m_notifier->on_ready_to_read = [this] {
u8 buffer[BUFSIZ];
ssize_t nread = read(m_ptm_fd, buffer, sizeof(buffer));
if (nread < 0) {
dbgln("Terminal read error: {}", strerror(errno));
perror("read(ptm)");
GUI::Application::the()->quit(1);
return;
}
if (nread == 0) {
dbgln("TerminalWidget: EOF on master pty, firing on_command_exit hook.");
if (on_command_exit)
on_command_exit();
int rc = close(m_ptm_fd);
if (rc < 0) {
perror("close");
}
set_pty_master_fd(-1);
return;
}
for (ssize_t i = 0; i < nread; ++i)
m_terminal.on_input(buffer[i]);
flush_dirty_lines();
};
}
TerminalWidget::TerminalWidget(int ptm_fd, bool automatic_size_policy)
: m_terminal(*this)
, m_automatic_size_policy(automatic_size_policy)
{
static_assert(sizeof(m_colors) == sizeof(xterm_colors));
memcpy(m_colors, xterm_colors, sizeof(m_colors));
set_override_cursor(Gfx::StandardCursor::IBeam);
set_focus_policy(GUI::FocusPolicy::StrongFocus);
set_pty_master_fd(ptm_fd);
on_emoji_input = [this](auto emoji) {
inject_string(emoji);
};
m_cursor_blink_timer = add<Core::Timer>();
m_visual_beep_timer = add<Core::Timer>();
m_auto_scroll_timer = add<Core::Timer>();
m_scrollbar = add<GUI::Scrollbar>(Orientation::Vertical);
m_scrollbar->set_scroll_animation(GUI::Scrollbar::Animation::CoarseScroll);
m_scrollbar->set_relative_rect(0, 0, 16, 0);
m_scrollbar->on_change = [this](int) {
update();
};
m_cursor_blink_timer->set_interval(Config::read_i32("Terminal"sv, "Text"sv, "CursorBlinkInterval"sv, 500));
m_cursor_blink_timer->on_timeout = [this] {
m_cursor_blink_state = !m_cursor_blink_state;
update_cursor();
};
m_auto_scroll_timer->set_interval(50);
m_auto_scroll_timer->on_timeout = [this] {
if (m_auto_scroll_direction != AutoScrollDirection::None) {
int scroll_amount = m_auto_scroll_direction == AutoScrollDirection::Up ? -1 : 1;
m_scrollbar->increase_slider_by(scroll_amount);
}
};
m_auto_scroll_timer->start();
auto font_entry = Config::read_string("Terminal"sv, "Text"sv, "Font"sv, "default"sv);
if (font_entry == "default")
set_font(Gfx::FontDatabase::default_fixed_width_font());
else
set_font(Gfx::FontDatabase::the().get_by_name(font_entry));
update_cached_font_metrics();
m_terminal.set_size(Config::read_i32("Terminal"sv, "Window"sv, "Width"sv, 80), Config::read_i32("Terminal"sv, "Window"sv, "Height"sv, 25));
m_copy_action = GUI::Action::create("&Copy", { Mod_Ctrl | Mod_Shift, Key_C }, Gfx::Bitmap::load_from_file("/res/icons/16x16/edit-copy.png"sv).release_value_but_fixme_should_propagate_errors(), [this](auto&) {
copy();
});
m_copy_action->set_swallow_key_event_when_disabled(true);
m_paste_action = GUI::Action::create("&Paste", { Mod_Ctrl | Mod_Shift, Key_V }, Gfx::Bitmap::load_from_file("/res/icons/16x16/paste.png"sv).release_value_but_fixme_should_propagate_errors(), [this](auto&) {
paste();
});
m_paste_action->set_swallow_key_event_when_disabled(true);
m_clear_including_history_action = GUI::Action::create("Clear Including &History", { Mod_Ctrl | Mod_Shift, Key_K }, [this](auto&) {
clear_including_history();
});
m_context_menu = GUI::Menu::construct();
m_context_menu->add_action(copy_action());
m_context_menu->add_action(paste_action());
m_context_menu->add_separator();
m_context_menu->add_action(clear_including_history_action());
update_copy_action();
update_paste_action();
update_color_scheme();
}
Gfx::IntRect TerminalWidget::glyph_rect(u16 row, u16 column)
{
int y = row * m_line_height;
int x = column * m_column_width;
return { x + frame_thickness() + m_inset, y + frame_thickness() + m_inset, m_column_width, m_cell_height };
}
Gfx::IntRect TerminalWidget::row_rect(u16 row)
{
int y = row * m_line_height;
Gfx::IntRect rect = { frame_thickness() + m_inset, y + frame_thickness() + m_inset, m_column_width * m_terminal.columns(), m_cell_height };
rect.inflate(0, m_line_spacing);
return rect;
}
void TerminalWidget::set_logical_focus(bool focus)
{
m_has_logical_focus = focus;
if (!m_has_logical_focus) {
m_cursor_blink_timer->stop();
m_cursor_blink_state = true;
} else if (m_cursor_is_blinking_set) {
m_cursor_blink_timer->stop();
m_cursor_blink_state = true;
m_cursor_blink_timer->start();
}
set_auto_scroll_direction(AutoScrollDirection::None);
invalidate_cursor();
update();
}
void TerminalWidget::focusin_event(GUI::FocusEvent& event)
{
set_logical_focus(true);
return GUI::Frame::focusin_event(event);
}
void TerminalWidget::focusout_event(GUI::FocusEvent& event)
{
set_logical_focus(false);
return GUI::Frame::focusout_event(event);
}
void TerminalWidget::event(Core::Event& event)
{
if (event.type() == GUI::Event::ThemeChange)
update_color_scheme();
else if (event.type() == GUI::Event::WindowBecameActive)
set_logical_focus(true);
else if (event.type() == GUI::Event::WindowBecameInactive)
set_logical_focus(false);
return GUI::Frame::event(event);
}
void TerminalWidget::keydown_event(GUI::KeyEvent& event)
{
// We specifically need to process shortcuts before input to the Terminal is done
// since otherwise escape sequences will eat all our shortcuts for dinner.
window()->propagate_shortcuts_up_to_application(event, this);
if (event.is_accepted())
return;
if (m_ptm_fd == -1) {
return GUI::Frame::keydown_event(event);
}
// Reset timer so cursor doesn't blink while typing.
if (m_cursor_is_blinking_set) {
m_cursor_blink_timer->stop();
m_cursor_blink_state = true;
m_cursor_blink_timer->start();
}
if (event.key() == KeyCode::Key_PageUp && event.modifiers() == Mod_Shift) {
m_scrollbar->decrease_slider_by(m_terminal.rows());
return;
}
if (event.key() == KeyCode::Key_PageDown && event.modifiers() == Mod_Shift) {
m_scrollbar->increase_slider_by(m_terminal.rows());
return;
}
if (event.key() == KeyCode::Key_Alt) {
m_alt_key_held = true;
return;
}
// Clear the selection if we type in/behind it.
auto future_cursor_column = (event.key() == KeyCode::Key_Backspace) ? m_terminal.cursor_column() - 1 : m_terminal.cursor_column();
auto min_selection_row = min(m_selection.start().row(), m_selection.end().row());
auto max_selection_row = max(m_selection.start().row(), m_selection.end().row());
if (future_cursor_column <= last_selection_column_on_row(m_terminal.cursor_row()) && m_terminal.cursor_row() >= min_selection_row && m_terminal.cursor_row() <= max_selection_row) {
m_selection.set_end({});
update_copy_action();
update();
}
m_terminal.handle_key_press(event.key(), event.code_point(), event.modifiers());
if (event.key() != Key_Control && event.key() != Key_Alt && event.key() != Key_LeftShift && event.key() != Key_RightShift && event.key() != Key_Super)
scroll_to_bottom();
}
void TerminalWidget::keyup_event(GUI::KeyEvent& event)
{
switch (event.key()) {
case KeyCode::Key_Alt:
m_alt_key_held = false;
return;
default:
break;
}
}
void TerminalWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Frame::paint_event(event);
GUI::Painter painter(*this);
auto visual_beep_active = m_visual_beep_timer->is_active();
painter.add_clip_rect(event.rect());
if (visual_beep_active)
painter.clear_rect(frame_inner_rect(), terminal_color_to_rgb(VT::Color::named(VT::Color::ANSIColor::Red)));
else
painter.clear_rect(frame_inner_rect(), terminal_color_to_rgb(VT::Color::named(VT::Color::ANSIColor::DefaultBackground)).with_alpha(m_opacity));
invalidate_cursor();
int rows_from_history = 0;
int first_row_from_history = m_terminal.history_size();
int row_with_cursor = m_terminal.cursor_row();
if (m_scrollbar->value() != m_scrollbar->max()) {
rows_from_history = min((int)m_terminal.rows(), m_scrollbar->max() - m_scrollbar->value());
first_row_from_history = m_terminal.history_size() - (m_scrollbar->max() - m_scrollbar->value());
row_with_cursor = m_terminal.cursor_row() + rows_from_history;
}
// Pass: Compute the rect(s) of the currently hovered link, if any.
Vector<Gfx::IntRect> hovered_href_rects;
if (!m_hovered_href_id.is_null()) {
for (u16 visual_row = 0; visual_row < m_terminal.rows(); ++visual_row) {
auto& line = m_terminal.line(first_row_from_history + visual_row);
for (size_t column = 0; column < line.length(); ++column) {
if (m_hovered_href_id == line.attribute_at(column).href_id) {
bool merged_with_existing_rect = false;
auto glyph_rect = this->glyph_rect(visual_row, column);
for (auto& rect : hovered_href_rects) {
if (rect.inflated(1, 1).intersects(glyph_rect)) {
rect = rect.united(glyph_rect);
merged_with_existing_rect = true;
break;
}
}
if (!merged_with_existing_rect)
hovered_href_rects.append(glyph_rect);
}
}
}
}
// Pass: Paint background & text decorations.
for (u16 visual_row = 0; visual_row < m_terminal.rows(); ++visual_row) {
auto row_rect = this->row_rect(visual_row);
if (!event.rect().contains(row_rect))
continue;
auto& line = m_terminal.line(first_row_from_history + visual_row);
bool has_only_one_background_color = line.has_only_one_background_color();
if (visual_beep_active)
painter.clear_rect(row_rect, terminal_color_to_rgb(VT::Color::named(VT::Color::ANSIColor::Red)));
else if (has_only_one_background_color)
painter.clear_rect(row_rect, terminal_color_to_rgb(line.attribute_at(0).effective_background_color()).with_alpha(m_opacity));
for (size_t column = 0; column < line.length(); ++column) {
bool should_reverse_fill_for_cursor_or_selection = m_cursor_blink_state
&& m_cursor_shape == VT::CursorShape::Block
&& m_has_logical_focus
&& visual_row == row_with_cursor
&& column == m_terminal.cursor_column();
should_reverse_fill_for_cursor_or_selection |= selection_contains({ first_row_from_history + visual_row, (int)column });
auto attribute = line.attribute_at(column);
auto character_rect = glyph_rect(visual_row, column);
auto cell_rect = character_rect.inflated(0, m_line_spacing);
auto text_color_before_bold_change = should_reverse_fill_for_cursor_or_selection ? attribute.effective_background_color() : attribute.effective_foreground_color();
auto text_color = terminal_color_to_rgb(m_show_bold_text_as_bright ? text_color_before_bold_change.to_bright() : text_color_before_bold_change);
if ((!visual_beep_active && !has_only_one_background_color) || should_reverse_fill_for_cursor_or_selection)
painter.clear_rect(cell_rect, terminal_color_to_rgb(should_reverse_fill_for_cursor_or_selection ? attribute.effective_foreground_color() : attribute.effective_background_color()));
if constexpr (TERMINAL_DEBUG) {
if (line.termination_column() == column)
painter.clear_rect(cell_rect, Gfx::Color::Magenta);
}
enum class UnderlineStyle {
None,
Dotted,
Solid,
};
auto underline_style = UnderlineStyle::None;
auto underline_color = text_color;
if (has_flag(attribute.flags, VT::Attribute::Flags::Underline)) {
// Content has specified underline
underline_style = UnderlineStyle::Solid;
} else if (!attribute.href.is_empty()) {
// We're hovering a hyperlink
if (m_hovered_href_id == attribute.href_id || m_active_href_id == attribute.href_id) {
underline_style = UnderlineStyle::Solid;
underline_color = palette().active_link();
} else {
underline_style = UnderlineStyle::Dotted;
underline_color = text_color.darkened(0.6f);
}
}
if (underline_style == UnderlineStyle::Solid) {
painter.draw_line(cell_rect.bottom_left(), cell_rect.bottom_right(), underline_color);
} else if (underline_style == UnderlineStyle::Dotted) {
int x1 = cell_rect.bottom_left().x();
int x2 = cell_rect.bottom_right().x();
int y = cell_rect.bottom_left().y();
for (int x = x1; x <= x2; ++x) {
if ((x % 3) == 0)
painter.set_pixel({ x, y }, underline_color);
}
}
}
}
// Paint the hovered link rects, if any.
for (auto rect : hovered_href_rects) {
rect.inflate(6, 6);
painter.fill_rect(rect, palette().base());
painter.draw_rect(rect.inflated(2, 2).intersected(frame_inner_rect()), palette().base_text());
}
auto& font = this->font();
auto& bold_font = font.bold_variant();
// Pass: Paint foreground (text).
for (u16 visual_row = 0; visual_row < m_terminal.rows(); ++visual_row) {
auto row_rect = this->row_rect(visual_row);
if (!event.rect().contains(row_rect))
continue;
auto& line = m_terminal.line(first_row_from_history + visual_row);
for (size_t column = 0; column < line.length(); ++column) {
auto attribute = line.attribute_at(column);
bool should_reverse_fill_for_cursor_or_selection = m_cursor_blink_state
&& m_cursor_shape == VT::CursorShape::Block
&& m_has_logical_focus
&& visual_row == row_with_cursor
&& column == m_terminal.cursor_column();
should_reverse_fill_for_cursor_or_selection |= selection_contains({ first_row_from_history + visual_row, (int)column });
auto text_color_before_bold_change = should_reverse_fill_for_cursor_or_selection ? attribute.effective_background_color() : attribute.effective_foreground_color();
auto text_color = terminal_color_to_rgb(m_show_bold_text_as_bright ? text_color_before_bold_change.to_bright() : text_color_before_bold_change);
u32 code_point = line.code_point(column);
if (code_point == ' ')
continue;
auto character_rect = glyph_rect(visual_row, column);
if (!m_hovered_href_id.is_null() && attribute.href_id == m_hovered_href_id) {
text_color = palette().base_text();
}
painter.draw_glyph_or_emoji(
character_rect.location(),
code_point,
has_flag(attribute.flags, VT::Attribute::Flags::Bold) ? bold_font : font,
text_color);
}
}
// Draw cursor.
if (m_cursor_blink_state && row_with_cursor < m_terminal.rows()) {
auto& cursor_line = m_terminal.line(first_row_from_history + row_with_cursor);
if (m_terminal.cursor_row() >= (m_terminal.rows() - rows_from_history))
return;
if (m_has_logical_focus && m_cursor_shape == VT::CursorShape::Block)
return; // This has already been handled by inverting the cell colors
auto cursor_color = terminal_color_to_rgb(cursor_line.attribute_at(m_terminal.cursor_column()).effective_foreground_color());
auto cell_rect = glyph_rect(row_with_cursor, m_terminal.cursor_column()).inflated(0, m_line_spacing);
if (m_cursor_shape == VT::CursorShape::Underline) {
auto x1 = cell_rect.bottom_left().x();
auto x2 = cell_rect.bottom_right().x();
auto y = cell_rect.bottom_left().y();
for (auto x = x1; x <= x2; ++x)
painter.set_pixel({ x, y }, cursor_color);
} else if (m_cursor_shape == VT::CursorShape::Bar) {
auto x = cell_rect.bottom_left().x();
auto y1 = cell_rect.top_left().y();
auto y2 = cell_rect.bottom_left().y();
for (auto y = y1; y <= y2; ++y)
painter.set_pixel({ x, y }, cursor_color);
} else {
// We fall back to a block if we don't support the selected cursor type.
painter.draw_rect(cell_rect, cursor_color);
}
}
}
void TerminalWidget::set_window_progress(int value, int max)
{
float float_value = value;
float float_max = max;
float progress = (float_value / float_max) * 100.0f;
window()->set_progress((int)roundf(progress));
}
void TerminalWidget::set_window_title(StringView title)
{
if (!Utf8View(title).validate()) {
dbgln("TerminalWidget: Attempted to set window title to invalid UTF-8 string");
return;
}
if (on_title_change)
on_title_change(title);
}
void TerminalWidget::invalidate_cursor()
{
m_terminal.invalidate_cursor();
}
void TerminalWidget::flush_dirty_lines()
{
// FIXME: Update smarter when scrolled
if (m_terminal.m_need_full_flush || m_scrollbar->value() != m_scrollbar->max()) {
update();
m_terminal.m_need_full_flush = false;
return;
}
Gfx::IntRect rect;
for (int i = 0; i < m_terminal.rows(); ++i) {
if (m_terminal.visible_line(i).is_dirty()) {
rect = rect.united(row_rect(i));
m_terminal.visible_line(i).set_dirty(false);
}
}
update(rect);
}
void TerminalWidget::resize_event(GUI::ResizeEvent& event)
{
relayout(event.size());
}
void TerminalWidget::relayout(Gfx::IntSize size)
{
if (!m_scrollbar)
return;
TemporaryChange change(m_in_relayout, true);
auto base_size = compute_base_size();
int new_columns = (size.width() - base_size.width()) / m_column_width;
int new_rows = (size.height() - base_size.height()) / m_line_height;
m_terminal.set_size(new_columns, new_rows);
Gfx::IntRect scrollbar_rect = {
size.width() - m_scrollbar->width() - frame_thickness(),
frame_thickness(),
m_scrollbar->width(),
size.height() - frame_thickness() * 2,
};
m_scrollbar->set_relative_rect(scrollbar_rect);
m_scrollbar->set_page_step(new_rows);
}
Gfx::IntSize TerminalWidget::compute_base_size() const
{
int base_width = frame_thickness() * 2 + m_inset * 2 + m_scrollbar->width();
int base_height = frame_thickness() * 2 + m_inset * 2;
return { base_width, base_height };
}
void TerminalWidget::apply_size_increments_to_window(GUI::Window& window)
{
window.set_size_increment({ m_column_width, m_line_height });
window.set_base_size(compute_base_size());
}
void TerminalWidget::update_cursor()
{
invalidate_cursor();
flush_dirty_lines();
}
void TerminalWidget::set_opacity(u8 new_opacity)
{
if (m_opacity == new_opacity)
return;
window()->set_has_alpha_channel(new_opacity < 255);
m_opacity = new_opacity;
update();
}
void TerminalWidget::set_show_scrollbar(bool show_scrollbar)
{
m_scrollbar->set_visible(show_scrollbar);
}
bool TerminalWidget::has_selection() const
{
return m_selection.is_valid();
}
void TerminalWidget::set_selection(const VT::Range& selection)
{
m_selection = selection;
update_copy_action();
update();
}
bool TerminalWidget::selection_contains(const VT::Position& position) const
{
if (!has_selection())
return false;
if (m_rectangle_selection) {
auto m_selection_start = m_selection.start();
auto m_selection_end = m_selection.end();
auto min_selection_column = min(m_selection_start.column(), m_selection_end.column());
auto max_selection_column = max(m_selection_start.column(), m_selection_end.column());
auto min_selection_row = min(m_selection_start.row(), m_selection_end.row());
auto max_selection_row = max(m_selection_start.row(), m_selection_end.row());
return position.column() >= min_selection_column && position.column() <= max_selection_column && position.row() >= min_selection_row && position.row() <= max_selection_row;
}
auto normalized_selection = m_selection.normalized();
return position >= normalized_selection.start() && position <= normalized_selection.end();
}
VT::Position TerminalWidget::buffer_position_at(Gfx::IntPoint position) const
{
auto adjusted_position = position.translated(-(frame_thickness() + m_inset), -(frame_thickness() + m_inset));
int row = adjusted_position.y() / m_line_height;
int column = adjusted_position.x() / m_column_width;
if (row < 0)
row = 0;
if (column < 0)
column = 0;
if (row >= m_terminal.rows())
row = m_terminal.rows() - 1;
auto& line = m_terminal.line(row);
if (column >= (int)line.length())
column = line.length() - 1;
row += m_scrollbar->value();
return { row, column };
}
u32 TerminalWidget::code_point_at(const VT::Position& position) const
{
VERIFY(position.is_valid());
VERIFY(position.row() >= 0 && static_cast<size_t>(position.row()) < m_terminal.line_count());
auto& line = m_terminal.line(position.row());
if (static_cast<size_t>(position.column()) == line.length())
return '\n';
return line.code_point(position.column());
}
VT::Position TerminalWidget::next_position_after(const VT::Position& position, bool should_wrap) const
{
VERIFY(position.is_valid());
VERIFY(position.row() >= 0 && static_cast<size_t>(position.row()) < m_terminal.line_count());
auto& line = m_terminal.line(position.row());
if (static_cast<size_t>(position.column()) == line.length()) {
if (static_cast<size_t>(position.row()) == m_terminal.line_count() - 1) {
if (should_wrap)
return { 0, 0 };
return {};
}
return { position.row() + 1, 0 };
}
return { position.row(), position.column() + 1 };
}
VT::Position TerminalWidget::previous_position_before(const VT::Position& position, bool should_wrap) const
{
VERIFY(position.row() >= 0 && static_cast<size_t>(position.row()) < m_terminal.line_count());
if (position.column() == 0) {
if (position.row() == 0) {
if (should_wrap) {
auto& last_line = m_terminal.line(m_terminal.line_count() - 1);
return { static_cast<int>(m_terminal.line_count() - 1), static_cast<int>(last_line.length()) };
}
return {};
}
auto& prev_line = m_terminal.line(position.row() - 1);
return { position.row() - 1, static_cast<int>(prev_line.length()) };
}
return { position.row(), position.column() - 1 };
}
static u32 to_lowercase_code_point(u32 code_point)
{
// FIXME: this only handles ascii characters, but handling unicode lowercasing seems like a mess
if (code_point < 128)
return tolower(code_point);
return code_point;
}
VT::Range TerminalWidget::find_next(StringView needle, const VT::Position& start, bool case_sensitivity, bool should_wrap)
{
if (needle.is_empty())
return {};
VT::Position position = start.is_valid() ? start : VT::Position(0, 0);
VT::Position original_position = position;
VT::Position start_of_potential_match;
size_t needle_index = 0;
do {
auto ch = code_point_at(position);
// FIXME: This is not the right way to use a Unicode needle!
auto needle_ch = (u32)needle[needle_index];
if (case_sensitivity ? ch == needle_ch : to_lowercase_code_point(ch) == to_lowercase_code_point(needle_ch)) {
if (needle_index == 0)
start_of_potential_match = position;
++needle_index;
if (needle_index >= needle.length())
return { start_of_potential_match, position };
} else {
if (needle_index > 0)
position = start_of_potential_match;
needle_index = 0;
}
position = next_position_after(position, should_wrap);
} while (position.is_valid() && position != original_position);
return {};
}
VT::Range TerminalWidget::find_previous(StringView needle, const VT::Position& start, bool case_sensitivity, bool should_wrap)
{
if (needle.is_empty())
return {};
VT::Position position = start.is_valid() ? start : VT::Position(m_terminal.line_count() - 1, m_terminal.line(m_terminal.line_count() - 1).length() - 1);
VT::Position original_position = position;
VT::Position end_of_potential_match;
size_t needle_index = needle.length() - 1;
do {
auto ch = code_point_at(position);
// FIXME: This is not the right way to use a Unicode needle!
auto needle_ch = (u32)needle[needle_index];
if (case_sensitivity ? ch == needle_ch : to_lowercase_code_point(ch) == to_lowercase_code_point(needle_ch)) {
if (needle_index == needle.length() - 1)
end_of_potential_match = position;
if (needle_index == 0)
return { position, end_of_potential_match };
--needle_index;
} else {
if (needle_index < needle.length() - 1)
position = end_of_potential_match;
needle_index = needle.length() - 1;
}
position = previous_position_before(position, should_wrap);
} while (position.is_valid() && position != original_position);
return {};
}
void TerminalWidget::doubleclick_event(GUI::MouseEvent& event)
{
if (event.button() == GUI::MouseButton::Primary) {
auto attribute = m_terminal.attribute_at(buffer_position_at(event.position()));
if (!attribute.href_id.is_null()) {
dbgln("Open hyperlinked URL: '{}'", attribute.href);
Desktop::Launcher::open(attribute.href);
return;
}
m_triple_click_timer.start();
auto position = buffer_position_at(event.position());
auto& line = m_terminal.line(position.row());
bool want_whitespace = line.code_point(position.column()) == ' ';
int start_column = 0;
int end_column = 0;
for (int column = position.column(); column >= 0 && (line.code_point(column) == ' ') == want_whitespace; --column) {
start_column = column;
}
for (int column = position.column(); column < (int)line.length() && (line.code_point(column) == ' ') == want_whitespace; ++column) {
end_column = column;
}
m_selection.set({ position.row(), start_column }, { position.row(), end_column });
update_copy_action();
update();
}
GUI::Frame::doubleclick_event(event);
}
void TerminalWidget::paste()
{
if (m_ptm_fd == -1)
return;
auto [data, mime_type, _] = GUI::Clipboard::the().fetch_data_and_type();
if (!mime_type.starts_with("text/"sv))
return;
if (data.is_empty())
return;
send_non_user_input(data);
}
void TerminalWidget::copy()
{
if (has_selection())
GUI::Clipboard::the().set_plain_text(selected_text());
}
void TerminalWidget::mouseup_event(GUI::MouseEvent& event)
{
if (event.button() == GUI::MouseButton::Primary) {
if (!m_active_href_id.is_null()) {
m_active_href = {};
m_active_href_id = {};
update();
}
if (m_triple_click_timer.is_valid())
m_triple_click_timer.reset();
set_auto_scroll_direction(AutoScrollDirection::None);
}
}
void TerminalWidget::mousedown_event(GUI::MouseEvent& event)
{
using namespace AK::TimeLiterals;
if (event.button() == GUI::MouseButton::Primary) {
m_left_mousedown_position = event.position();
m_left_mousedown_position_buffer = buffer_position_at(m_left_mousedown_position);
auto attribute = m_terminal.attribute_at(m_left_mousedown_position_buffer);
if (!(event.modifiers() & Mod_Shift) && !attribute.href.is_empty()) {
m_active_href = attribute.href;
m_active_href_id = attribute.href_id;
update();
return;
}
m_active_href = {};
m_active_href_id = {};
if (m_triple_click_timer.is_valid() && m_triple_click_timer.elapsed_time() < 250_ms) {
int start_column = 0;
int end_column = m_terminal.columns() - 1;
m_selection.set({ m_left_mousedown_position_buffer.row(), start_column }, { m_left_mousedown_position_buffer.row(), end_column });
} else {
m_selection.set(m_left_mousedown_position_buffer, {});
}
if (m_alt_key_held)
m_rectangle_selection = true;
else if (m_rectangle_selection)
m_rectangle_selection = false;
update_copy_action();
update();
}
}
void TerminalWidget::mousemove_event(GUI::MouseEvent& event)
{
auto position = buffer_position_at(event.position());
auto attribute = m_terminal.attribute_at(position);
if (attribute.href_id != m_hovered_href_id) {
if (!attribute.href_id.is_null()) {
m_hovered_href_id = attribute.href_id;
m_hovered_href = attribute.href;
auto handlers = Desktop::Launcher::get_handlers_for_url(attribute.href);
if (!handlers.is_empty()) {
auto url = URL(attribute.href);
auto path = url.path();
auto app_file = Desktop::AppFile::get_for_app(LexicalPath::basename(handlers[0]));
auto app_name = app_file->is_valid() ? app_file->name() : LexicalPath::basename(handlers[0]);
if (url.scheme() == "file") {
auto file_name = LexicalPath::basename(path);
if (path == handlers[0]) {
set_tooltip(DeprecatedString::formatted("Execute {}", app_name));
} else {
set_tooltip(DeprecatedString::formatted("Open {} with {}", file_name, app_name));
}
} else {
set_tooltip(DeprecatedString::formatted("Open {} with {}", attribute.href, app_name));
}
}
} else {
m_hovered_href_id = {};
m_hovered_href = {};
set_tooltip({});
}
show_or_hide_tooltip();
if (!m_hovered_href.is_empty())
set_override_cursor(Gfx::StandardCursor::Arrow);
else
set_override_cursor(Gfx::StandardCursor::IBeam);
update();
}
if (!(event.buttons() & GUI::MouseButton::Primary))
return;
if (!m_active_href_id.is_null()) {
auto diff = event.position() - m_left_mousedown_position;
auto distance_travelled_squared = diff.x() * diff.x() + diff.y() * diff.y();
constexpr int drag_distance_threshold = 5;
if (distance_travelled_squared <= drag_distance_threshold)
return;
auto drag_operation = GUI::DragOperation::construct();
drag_operation->set_text(m_active_href);
drag_operation->set_data("text/uri-list", m_active_href);
m_active_href = {};
m_active_href_id = {};
m_hovered_href = {};
m_hovered_href_id = {};
drag_operation->exec();
update();
return;
}
auto adjusted_position = event.position().translated(-(frame_thickness() + m_inset), -(frame_thickness() + m_inset));
if (adjusted_position.y() < 0)
set_auto_scroll_direction(AutoScrollDirection::Up);
else if (adjusted_position.y() > m_terminal.rows() * m_line_height)
set_auto_scroll_direction(AutoScrollDirection::Down);
else
set_auto_scroll_direction(AutoScrollDirection::None);
VT::Position old_selection_end = m_selection.end();
VT::Position old_selection_start = m_selection.start();
if (m_triple_click_timer.is_valid()) {
int start_column = 0;
int end_column = m_terminal.columns() - 1;
if (position.row() < m_left_mousedown_position_buffer.row())
m_selection.set({ position.row(), start_column }, { m_left_mousedown_position_buffer.row(), end_column });
else
m_selection.set({ m_left_mousedown_position_buffer.row(), start_column }, { position.row(), end_column });
} else {
m_selection.set_end(position);
}
if (old_selection_end != m_selection.end() || old_selection_start != m_selection.start()) {
update_copy_action();
update();
}
}
void TerminalWidget::leave_event(Core::Event&)
{
bool should_update = !m_hovered_href.is_empty();
m_hovered_href = {};
m_hovered_href_id = {};
set_tooltip(m_hovered_href);
set_override_cursor(Gfx::StandardCursor::IBeam);
if (should_update)
update();
}
void TerminalWidget::mousewheel_event(GUI::MouseEvent& event)
{
if (!is_scrollable())
return;
set_auto_scroll_direction(AutoScrollDirection::None);
m_scrollbar->increase_slider_by(event.wheel_delta_y() * scroll_length());
GUI::Frame::mousewheel_event(event);
}
bool TerminalWidget::is_scrollable() const
{
return m_scrollbar->is_scrollable();
}
int TerminalWidget::scroll_length() const
{
return m_scrollbar->step();
}
DeprecatedString TerminalWidget::selected_text() const
{
StringBuilder builder;
auto normalized_selection = m_selection.normalized();
auto start = normalized_selection.start();
auto end = normalized_selection.end();
for (int row = start.row(); row <= end.row(); ++row) {
int first_column = first_selection_column_on_row(row);
int last_column = last_selection_column_on_row(row);
for (int column = first_column; column <= last_column; ++column) {
auto& line = m_terminal.line(row);
if (line.attribute_at(column).is_untouched()) {
builder.append('\n');
break;
}
// FIXME: This is a bit hackish.
u32 code_point = line.code_point(column);
builder.append(Utf32View(&code_point, 1));
if (column == static_cast<int>(line.length()) - 1 || (m_rectangle_selection && column == last_column)) {
builder.append('\n');
}
}
}
return builder.to_deprecated_string();
}
int TerminalWidget::first_selection_column_on_row(int row) const
{
auto normalized_selection_start = m_selection.normalized().start();
return row == normalized_selection_start.row() || m_rectangle_selection ? normalized_selection_start.column() : 0;
}
int TerminalWidget::last_selection_column_on_row(int row) const
{
auto normalized_selection_end = m_selection.normalized().end();
return row == normalized_selection_end.row() || m_rectangle_selection ? normalized_selection_end.column() : m_terminal.columns() - 1;
}
void TerminalWidget::terminal_history_changed(int delta)
{
bool was_max = m_scrollbar->value() == m_scrollbar->max();
m_scrollbar->set_max(m_terminal.history_size());
if (was_max)
m_scrollbar->set_value(m_scrollbar->max());
m_scrollbar->update();
// If the history buffer wrapped around, the selection needs to be offset accordingly.
if (m_selection.is_valid() && delta < 0)
m_selection.offset_row(delta);
}
void TerminalWidget::terminal_did_resize(u16 columns, u16 rows)
{
auto pixel_size = widget_size_for_font(font());
m_pixel_width = pixel_size.width();
m_pixel_height = pixel_size.height();
if (!m_in_relayout) {
if (on_terminal_size_change)
on_terminal_size_change(Gfx::IntSize { m_pixel_width, m_pixel_height });
}
if (m_automatic_size_policy) {
set_fixed_size(m_pixel_width, m_pixel_height);
}
update();
winsize ws;
ws.ws_row = rows;
ws.ws_col = columns;
if (m_ptm_fd != -1) {
if (ioctl(m_ptm_fd, TIOCSWINSZ, &ws) < 0) {
// This can happen if we resize just as the shell exits.
dbgln("Notifying the pseudo-terminal about a size change failed.");
}
}
}
void TerminalWidget::beep()
{
if (m_bell_mode == BellMode::Disabled) {
return;
}
if (m_bell_mode == BellMode::AudibleBeep) {
sysbeep();
return;
}
m_visual_beep_timer->restart(200);
m_visual_beep_timer->set_single_shot(true);
m_visual_beep_timer->on_timeout = [this] {
update();
};
update();
}
void TerminalWidget::emit(u8 const* data, size_t size)
{
if (write(m_ptm_fd, data, size) < 0) {
perror("TerminalWidget::emit: write");
}
}
void TerminalWidget::set_cursor_blinking(bool blinking)
{
if (blinking) {
m_cursor_blink_timer->stop();
m_cursor_blink_state = true;
m_cursor_blink_timer->start();
m_cursor_is_blinking_set = true;
} else {
m_cursor_blink_timer->stop();
m_cursor_blink_state = true;
m_cursor_is_blinking_set = false;
}
invalidate_cursor();
}
void TerminalWidget::set_cursor_shape(CursorShape shape)
{
m_cursor_shape = shape;
invalidate_cursor();
update();
}
void TerminalWidget::context_menu_event(GUI::ContextMenuEvent& event)
{
if (m_hovered_href_id.is_null()) {
m_context_menu->popup(event.screen_position());
} else {
m_context_menu_href = m_hovered_href;
// Ask LaunchServer for a list of programs that can handle the right-clicked URL.
auto handlers = Desktop::Launcher::get_handlers_for_url(m_hovered_href);
if (handlers.is_empty()) {
m_context_menu->popup(event.screen_position());
return;
}
m_context_menu_for_hyperlink = GUI::Menu::construct();
RefPtr<GUI::Action> context_menu_default_action;
// Go through the list of handlers and see if we can find a nice display name + icon for them.
// Then add them to the context menu.
// FIXME: Adapt this code when we actually support calling LaunchServer with a specific handler in mind.
for (auto& handler : handlers) {
auto af = Desktop::AppFile::get_for_app(LexicalPath::basename(handler));
if (!af->is_valid())
continue;
auto action = GUI::Action::create(DeprecatedString::formatted("&Open in {}", af->name()), af->icon().bitmap_for_size(16), [this, handler](auto&) {
Desktop::Launcher::open(m_context_menu_href, handler);
});
if (context_menu_default_action.is_null()) {
context_menu_default_action = action;
}
m_context_menu_for_hyperlink->add_action(action);
}
m_context_menu_for_hyperlink->add_action(GUI::Action::create("Copy &URL", [this](auto&) {
GUI::Clipboard::the().set_plain_text(m_context_menu_href);
}));
m_context_menu_for_hyperlink->add_action(GUI::Action::create("Copy &Name", [&](auto&) {
// file://courage/home/anon/something -> /home/anon/something
auto path = URL(m_context_menu_href).path();
// /home/anon/something -> something
auto name = LexicalPath::basename(path);
GUI::Clipboard::the().set_plain_text(name);
}));
m_context_menu_for_hyperlink->add_separator();
m_context_menu_for_hyperlink->add_action(copy_action());
m_context_menu_for_hyperlink->add_action(paste_action());
m_context_menu_for_hyperlink->popup(event.screen_position(), context_menu_default_action);
}
}
void TerminalWidget::drag_enter_event(GUI::DragEvent& event)
{
auto const& mime_types = event.mime_types();
if (mime_types.contains_slow("text/plain") || mime_types.contains_slow("text/uri-list"))
event.accept();
}
void TerminalWidget::drop_event(GUI::DropEvent& event)
{
if (event.mime_data().has_urls()) {
event.accept();
auto urls = event.mime_data().urls();
bool first = true;
for (auto& url : event.mime_data().urls()) {
if (!first)
send_non_user_input(" "sv.bytes());
if (url.scheme() == "file")
send_non_user_input(url.path().bytes());
else
send_non_user_input(url.to_deprecated_string().bytes());
first = false;
}
} else if (event.mime_data().has_text()) {
event.accept();
auto text = event.mime_data().text();
send_non_user_input(text.bytes());
}
}
void TerminalWidget::did_change_font()
{
GUI::Frame::did_change_font();
update_cached_font_metrics();
if (!size().is_empty())
relayout(size());
}
static void collect_font_metrics(Gfx::Font const& font, int& column_width, int& cell_height, int& line_height, int& line_spacing)
{
line_spacing = 4;
column_width = static_cast<int>(ceilf(font.glyph_width('x')));
cell_height = static_cast<int>(ceilf(font.pixel_size()));
line_height = cell_height + line_spacing;
}
void TerminalWidget::update_cached_font_metrics()
{
collect_font_metrics(font(), m_column_width, m_cell_height, m_line_height, m_line_spacing);
}
void TerminalWidget::clear_including_history()
{
m_terminal.clear_including_history();
}
void TerminalWidget::scroll_to_bottom()
{
m_scrollbar->set_value(m_scrollbar->max());
}
void TerminalWidget::scroll_to_row(int row)
{
m_scrollbar->set_value(row);
}
void TerminalWidget::update_copy_action()
{
m_copy_action->set_enabled(has_selection());
}
void TerminalWidget::update_paste_action()
{
auto [data, mime_type, _] = GUI::Clipboard::the().fetch_data_and_type();
m_paste_action->set_enabled(mime_type.starts_with("text/"sv) && !data.is_empty());
}
void TerminalWidget::update_color_scheme()
{
auto const& palette = GUI::Widget::palette();
m_show_bold_text_as_bright = palette.bold_text_as_bright();
m_default_background_color = palette.background();
m_default_foreground_color = palette.foreground();
m_colors[0] = palette.black();
m_colors[1] = palette.red();
m_colors[2] = palette.green();
m_colors[3] = palette.yellow();
m_colors[4] = palette.blue();
m_colors[5] = palette.magenta();
m_colors[6] = palette.cyan();
m_colors[7] = palette.white();
m_colors[8] = palette.bright_black();
m_colors[9] = palette.bright_red();
m_colors[10] = palette.bright_green();
m_colors[11] = palette.bright_yellow();
m_colors[12] = palette.bright_blue();
m_colors[13] = palette.bright_magenta();
m_colors[14] = palette.bright_cyan();
m_colors[15] = palette.bright_white();
update();
}
Gfx::IntSize TerminalWidget::widget_size_for_font(Gfx::Font const& font) const
{
int column_width = 0;
int line_height = 0;
int cell_height = 0;
int line_spacing = 0;
collect_font_metrics(font, column_width, cell_height, line_height, line_spacing);
auto base_size = compute_base_size();
return {
base_size.width() + (m_terminal.columns() * column_width),
base_size.height() + (m_terminal.rows() * line_height),
};
}
constexpr Gfx::Color TerminalWidget::terminal_color_to_rgb(VT::Color color) const
{
switch (color.kind()) {
case VT::Color::Kind::RGB:
return Gfx::Color::from_rgb(color.as_rgb());
case VT::Color::Kind::Indexed:
return m_colors[color.as_indexed()];
case VT::Color::Kind::Named: {
auto ansi = color.as_named();
if ((u16)ansi < 256)
return m_colors[(u16)ansi];
else if (ansi == VT::Color::ANSIColor::DefaultForeground)
return m_default_foreground_color;
else if (ansi == VT::Color::ANSIColor::DefaultBackground)
return m_default_background_color;
else
VERIFY_NOT_REACHED();
}
default:
VERIFY_NOT_REACHED();
}
};
void TerminalWidget::set_font_and_resize_to_fit(Gfx::Font const& font)
{
resize(widget_size_for_font(font));
set_font(font);
}
// Used for sending data that was not directly typed by the user.
// This basically wraps the code that handles sending the escape sequence in bracketed paste mode.
void TerminalWidget::send_non_user_input(ReadonlyBytes bytes)
{
constexpr StringView leading_control_sequence = "\e[200~"sv;
constexpr StringView trailing_control_sequence = "\e[201~"sv;
int nwritten;
if (m_terminal.needs_bracketed_paste()) {
// We do not call write() separately for the control sequences and the data,
// because that would present a race condition where another process could inject data
// to prematurely terminate the escape. Could probably be solved by file locking.
Vector<u8> output;
output.ensure_capacity(leading_control_sequence.bytes().size() + bytes.size() + trailing_control_sequence.bytes().size());
// HACK: We don't have a `Vector<T>::unchecked_append(Span<T> const&)` yet :^(
output.append(leading_control_sequence.bytes().data(), leading_control_sequence.bytes().size());
output.append(bytes.data(), bytes.size());
output.append(trailing_control_sequence.bytes().data(), trailing_control_sequence.bytes().size());
nwritten = write(m_ptm_fd, output.data(), output.size());
} else {
nwritten = write(m_ptm_fd, bytes.data(), bytes.size());
}
if (nwritten < 0) {
perror("write");
VERIFY_NOT_REACHED();
}
}
void TerminalWidget::set_auto_scroll_direction(AutoScrollDirection direction)
{
m_auto_scroll_direction = direction;
m_auto_scroll_timer->set_active(direction != AutoScrollDirection::None);
}
Optional<VT::CursorShape> TerminalWidget::parse_cursor_shape(StringView cursor_shape_string)
{
if (cursor_shape_string == "Block"sv)
return VT::CursorShape::Block;
if (cursor_shape_string == "Underline"sv)
return VT::CursorShape::Underline;
if (cursor_shape_string == "Bar"sv)
return VT::CursorShape::Bar;
return {};
}
DeprecatedString TerminalWidget::stringify_cursor_shape(VT::CursorShape cursor_shape)
{
switch (cursor_shape) {
case VT::CursorShape::Block:
return "Block";
case VT::CursorShape::Underline:
return "Underline";
case VT::CursorShape::Bar:
return "Bar";
case VT::CursorShape::None:
return "None";
}
VERIFY_NOT_REACHED();
}
}