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ladybird/Userland/Libraries/LibGUI/TextEditor.cpp
Andreas Kling 1a08ac72ad LibC+Everywhere: Remove open_with_path_length() in favor of open() 
This API was a mostly gratuitous deviation from POSIX that gave up some
portability in exchange for avoiding the occasional strlen().

I don't think that was actually achieving anything valuable, so let's
just chill out and have the same open() API as everyone else. :^)
2021-01-12 23:34:01 +01:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/ScopeGuard.h>
#include <AK/StringBuilder.h>
#include <AK/TemporaryChange.h>
#include <LibCore/Timer.h>
#include <LibGUI/Action.h>
#include <LibGUI/AutocompleteProvider.h>
#include <LibGUI/Clipboard.h>
#include <LibGUI/EditingEngine.h>
#include <LibGUI/InputBox.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Painter.h>
#include <LibGUI/RegularEditingEngine.h>
#include <LibGUI/ScrollBar.h>
#include <LibGUI/SyntaxHighlighter.h>
#include <LibGUI/TextEditor.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Font.h>
#include <LibGfx/FontDatabase.h>
#include <LibGfx/Palette.h>
#include <ctype.h>
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <unistd.h>
//#define DEBUG_TEXTEDITOR
REGISTER_WIDGET(GUI, TextEditor)
namespace GUI {
TextEditor::TextEditor(Type type)
: m_type(type)
{
REGISTER_STRING_PROPERTY("text", text, set_text);
REGISTER_ENUM_PROPERTY("mode", mode, set_mode, Mode,
{ Editable, "Editable" },
{ ReadOnly, "ReadOnly" },
{ DisplayOnly, "DisplayOnly" });
set_focus_policy(GUI::FocusPolicy::StrongFocus);
set_accepts_emoji_input(true);
set_override_cursor(Gfx::StandardCursor::IBeam);
set_background_role(ColorRole::Base);
set_foreground_role(ColorRole::BaseText);
set_document(TextDocument::create());
if (is_single_line())
set_visualize_trailing_whitespace(false);
set_scrollbars_enabled(is_multi_line());
if (is_multi_line())
set_font(Gfx::FontDatabase::default_fixed_width_font());
vertical_scrollbar().set_step(line_height());
m_cursor = { 0, 0 };
m_automatic_selection_scroll_timer = add<Core::Timer>(100, [this] {
automatic_selection_scroll_timer_fired();
});
m_automatic_selection_scroll_timer->stop();
create_actions();
set_editing_engine(make<RegularEditingEngine>());
}
TextEditor::~TextEditor()
{
if (m_document)
m_document->unregister_client(*this);
}
void TextEditor::create_actions()
{
m_undo_action = CommonActions::make_undo_action([&](auto&) { undo(); }, this);
m_redo_action = CommonActions::make_redo_action([&](auto&) { redo(); }, this);
m_undo_action->set_enabled(false);
m_redo_action->set_enabled(false);
m_cut_action = CommonActions::make_cut_action([&](auto&) { cut(); }, this);
m_copy_action = CommonActions::make_copy_action([&](auto&) { copy(); }, this);
m_paste_action = CommonActions::make_paste_action([&](auto&) { paste(); }, this);
m_delete_action = CommonActions::make_delete_action([&](auto&) { do_delete(); }, this);
if (is_multi_line()) {
m_go_to_line_action = Action::create(
"Go to line...", { Mod_Ctrl, Key_L }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-forward.png"), [this](auto&) {
String value;
if (InputBox::show(value, window(), "Line:", "Go to line") == InputBox::ExecOK) {
auto line_target = value.to_uint();
if (line_target.has_value()) {
set_cursor_and_focus_line(line_target.value() - 1, 0);
}
}
},
this);
}
m_select_all_action = CommonActions::make_select_all_action([this](auto&) { select_all(); }, this);
}
void TextEditor::set_text(const StringView& text)
{
m_selection.clear();
document().set_text(text);
update_content_size();
recompute_all_visual_lines();
if (is_single_line())
set_cursor(0, line(0).length());
else
set_cursor(0, 0);
did_update_selection();
update();
}
void TextEditor::update_content_size()
{
int content_width = 0;
int content_height = 0;
for (auto& line : m_line_visual_data) {
content_width = max(line.visual_rect.width(), content_width);
content_height += line.visual_rect.height();
}
content_width += m_horizontal_content_padding * 2;
if (is_right_text_alignment(m_text_alignment))
content_width = max(frame_inner_rect().width(), content_width);
set_content_size({ content_width, content_height });
set_size_occupied_by_fixed_elements({ ruler_width(), 0 });
}
TextPosition TextEditor::text_position_at_content_position(const Gfx::IntPoint& content_position) const
{
auto position = content_position;
if (is_single_line() && icon())
position.move_by(-(icon_size() + icon_padding()), 0);
size_t line_index = 0;
if (is_line_wrapping_enabled()) {
for (size_t i = 0; i < line_count(); ++i) {
auto& rect = m_line_visual_data[i].visual_rect;
if (position.y() >= rect.top() && position.y() <= rect.bottom()) {
line_index = i;
break;
}
if (position.y() > rect.bottom())
line_index = line_count() - 1;
}
} else {
line_index = (size_t)(position.y() / line_height());
}
line_index = max((size_t)0, min(line_index, line_count() - 1));
size_t column_index = 0;
switch (m_text_alignment) {
case Gfx::TextAlignment::CenterLeft:
for_each_visual_line(line_index, [&](const Gfx::IntRect& rect, auto& view, size_t start_of_line, [[maybe_unused]] bool is_last_visual_line) {
if (is_multi_line() && !rect.contains_vertically(position.y()) && !is_last_visual_line)
return IterationDecision::Continue;
column_index = start_of_line;
if (position.x() <= 0) {
// We're outside the text on the left side, put cursor at column 0 on this visual line.
} else {
int glyph_x = 0;
size_t i = 0;
for (; i < view.length(); ++i) {
int advance = font().glyph_width(view.code_points()[i]) + font().glyph_spacing();
if ((glyph_x + (advance / 2)) >= position.x())
break;
glyph_x += advance;
}
column_index += i;
}
return IterationDecision::Break;
});
break;
case Gfx::TextAlignment::CenterRight:
// FIXME: Support right-aligned line wrapping, I guess.
ASSERT(!is_line_wrapping_enabled());
column_index = (position.x() - content_x_for_position({ line_index, 0 }) + fixed_glyph_width() / 2) / fixed_glyph_width();
break;
default:
ASSERT_NOT_REACHED();
}
column_index = max((size_t)0, min(column_index, line(line_index).length()));
return { line_index, column_index };
}
TextPosition TextEditor::text_position_at(const Gfx::IntPoint& widget_position) const
{
auto content_position = widget_position;
content_position.move_by(horizontal_scrollbar().value(), vertical_scrollbar().value());
content_position.move_by(-(m_horizontal_content_padding + ruler_width()), 0);
content_position.move_by(-frame_thickness(), -frame_thickness());
return text_position_at_content_position(content_position);
}
void TextEditor::doubleclick_event(MouseEvent& event)
{
if (event.button() != MouseButton::Left)
return;
if (is_displayonly())
return;
// NOTE: This ensures that spans are updated before we look at them.
flush_pending_change_notification_if_needed();
m_triple_click_timer.start();
m_in_drag_select = false;
auto start = text_position_at(event.position());
auto end = start;
if (!document().has_spans()) {
start = document().first_word_break_before(start, false);
end = document().first_word_break_after(end);
} else {
for (auto& span : document().spans()) {
if (!span.range.contains(start))
continue;
start = span.range.start();
end = span.range.end();
end.set_column(end.column() + 1);
break;
}
}
m_selection.set(start, end);
set_cursor(end);
update();
did_update_selection();
}
void TextEditor::mousedown_event(MouseEvent& event)
{
if (event.button() != MouseButton::Left) {
return;
}
if (on_mousedown)
on_mousedown();
if (is_displayonly())
return;
if (m_triple_click_timer.is_valid() && m_triple_click_timer.elapsed() < 250) {
m_triple_click_timer = Core::ElapsedTimer();
TextPosition start;
TextPosition end;
if (is_multi_line()) {
// select *current* line
start = TextPosition(m_cursor.line(), 0);
end = TextPosition(m_cursor.line(), line(m_cursor.line()).length());
} else {
// select *whole* line
start = TextPosition(0, 0);
end = TextPosition(line_count() - 1, line(line_count() - 1).length());
}
m_selection.set(start, end);
set_cursor(end);
update();
did_update_selection();
return;
}
if (event.modifiers() & Mod_Shift) {
if (!has_selection())
m_selection.set(m_cursor, {});
} else {
m_selection.clear();
}
m_in_drag_select = true;
m_automatic_selection_scroll_timer->start();
set_cursor(text_position_at(event.position()));
if (!(event.modifiers() & Mod_Shift)) {
if (!has_selection())
m_selection.set(m_cursor, {});
}
if (m_selection.start().is_valid() && m_selection.start() != m_cursor)
m_selection.set_end(m_cursor);
// FIXME: Only update the relevant rects.
update();
did_update_selection();
}
void TextEditor::mouseup_event(MouseEvent& event)
{
if (event.button() == MouseButton::Left) {
if (m_in_drag_select) {
m_in_drag_select = false;
}
return;
}
}
void TextEditor::mousemove_event(MouseEvent& event)
{
m_last_mousemove_position = event.position();
if (m_in_drag_select && (rect().contains(event.position()) || !m_automatic_selection_scroll_timer->is_active())) {
set_cursor(text_position_at(event.position()));
m_selection.set_end(m_cursor);
did_update_selection();
update();
return;
}
}
void TextEditor::automatic_selection_scroll_timer_fired()
{
if (!m_in_drag_select) {
m_automatic_selection_scroll_timer->stop();
return;
}
set_cursor(text_position_at(m_last_mousemove_position));
m_selection.set_end(m_cursor);
did_update_selection();
update();
}
int TextEditor::ruler_width() const
{
if (!m_ruler_visible)
return 0;
int line_count_digits = static_cast<int>(log10(line_count())) + 1;
constexpr size_t padding = 20;
return line_count() < 10 ? (line_count_digits + 1) * font().glyph_width('x') + padding : line_count_digits * font().glyph_width('x') + padding;
}
Gfx::IntRect TextEditor::ruler_content_rect(size_t line_index) const
{
if (!m_ruler_visible)
return {};
return {
0 - ruler_width() + horizontal_scrollbar().value(),
line_content_rect(line_index).y(),
ruler_width(),
line_content_rect(line_index).height()
};
}
Gfx::IntRect TextEditor::ruler_rect_in_inner_coordinates() const
{
return { 0, 0, ruler_width(), height() - height_occupied_by_horizontal_scrollbar() };
}
Gfx::IntRect TextEditor::visible_text_rect_in_inner_coordinates() const
{
return {
m_horizontal_content_padding + (m_ruler_visible ? (ruler_rect_in_inner_coordinates().right() + 1) : 0),
0,
frame_inner_rect().width() - (m_horizontal_content_padding * 2) - width_occupied_by_vertical_scrollbar() - ruler_width(),
frame_inner_rect().height() - height_occupied_by_horizontal_scrollbar()
};
}
void TextEditor::paint_event(PaintEvent& event)
{
Color widget_background_color = palette().color(is_enabled() ? background_role() : Gfx::ColorRole::Window);
// NOTE: This ensures that spans are updated before we look at them.
flush_pending_change_notification_if_needed();
Frame::paint_event(event);
Painter painter(*this);
painter.add_clip_rect(widget_inner_rect());
painter.add_clip_rect(event.rect());
painter.fill_rect(event.rect(), widget_background_color);
if (is_displayonly() && (is_focused() || has_visible_list())) {
widget_background_color = palette().selection();
Gfx::IntRect display_rect {
widget_inner_rect().x() + 1,
widget_inner_rect().y() + 1,
widget_inner_rect().width() - 2,
widget_inner_rect().height() - 2
};
painter.add_clip_rect(display_rect);
painter.add_clip_rect(event.rect());
painter.fill_rect(event.rect(), widget_background_color);
}
painter.translate(frame_thickness(), frame_thickness());
auto ruler_rect = ruler_rect_in_inner_coordinates();
if (m_ruler_visible) {
painter.fill_rect(ruler_rect, palette().ruler());
painter.draw_line(ruler_rect.top_right(), ruler_rect.bottom_right(), palette().ruler_border());
}
painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
if (m_ruler_visible)
painter.translate(ruler_width(), 0);
size_t first_visible_line = text_position_at(event.rect().top_left()).line();
size_t last_visible_line = text_position_at(event.rect().bottom_right()).line();
auto selection = normalized_selection();
bool has_selection = selection.is_valid();
if (m_ruler_visible) {
for (size_t i = first_visible_line; i <= last_visible_line; ++i) {
bool is_current_line = i == m_cursor.line();
auto ruler_line_rect = ruler_content_rect(i);
painter.draw_text(
ruler_line_rect.shrunken(2, 0).translated(0, m_line_spacing / 2),
String::number(i + 1),
is_current_line ? font().bold_variant() : font(),
Gfx::TextAlignment::TopRight,
is_current_line ? palette().ruler_active_text() : palette().ruler_inactive_text());
}
}
Gfx::IntRect text_clip_rect {
(m_ruler_visible ? (ruler_rect_in_inner_coordinates().right() + frame_thickness() + 1) : frame_thickness()),
frame_thickness(),
width() - width_occupied_by_vertical_scrollbar() - ruler_width(),
height() - height_occupied_by_horizontal_scrollbar()
};
if (m_ruler_visible)
text_clip_rect.move_by(-ruler_width(), 0);
text_clip_rect.move_by(horizontal_scrollbar().value(), vertical_scrollbar().value());
painter.add_clip_rect(text_clip_rect);
for (size_t line_index = first_visible_line; line_index <= last_visible_line; ++line_index) {
auto& line = this->line(line_index);
bool physical_line_has_selection = has_selection && line_index >= selection.start().line() && line_index <= selection.end().line();
size_t first_visual_line_with_selection = 0;
size_t last_visual_line_with_selection = 0;
if (physical_line_has_selection) {
if (selection.start().line() < line_index)
first_visual_line_with_selection = 0;
else
first_visual_line_with_selection = visual_line_containing(line_index, selection.start().column());
if (selection.end().line() > line_index)
last_visual_line_with_selection = m_line_visual_data[line_index].visual_line_breaks.size();
else
last_visual_line_with_selection = visual_line_containing(line_index, selection.end().column());
}
size_t selection_start_column_within_line = selection.start().line() == line_index ? selection.start().column() : 0;
size_t selection_end_column_within_line = selection.end().line() == line_index ? selection.end().column() : line.length();
size_t visual_line_index = 0;
for_each_visual_line(line_index, [&](const Gfx::IntRect& visual_line_rect, auto& visual_line_text, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
if (is_multi_line() && line_index == m_cursor.line())
painter.fill_rect(visual_line_rect, widget_background_color.darkened(0.9f));
#ifdef DEBUG_TEXTEDITOR
painter.draw_rect(visual_line_rect, Color::Cyan);
#endif
if (!placeholder().is_empty() && document().is_empty() && !is_focused() && line_index == 0) {
auto line_rect = visual_line_rect;
line_rect.set_width(font().width(placeholder()));
painter.draw_text(line_rect, placeholder(), m_text_alignment, palette().color(Gfx::ColorRole::PlaceholderText));
} else if (!document().has_spans()) {
// Fast-path for plain text
auto color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
if (is_displayonly() && (is_focused() || has_visible_list()))
color = palette().color(is_enabled() ? Gfx::ColorRole::SelectionText : Gfx::ColorRole::DisabledText);
painter.draw_text(visual_line_rect, visual_line_text, m_text_alignment, color);
} else {
Gfx::IntRect character_rect = { visual_line_rect.location(), { 0, line_height() } };
for (size_t i = 0; i < visual_line_text.length(); ++i) {
u32 code_point = visual_line_text.substring_view(i, 1).code_points()[0];
RefPtr<Gfx::Font> font = this->font();
Color color;
Optional<Color> background_color;
bool underline = false;
TextPosition physical_position(line_index, start_of_visual_line + i);
// FIXME: This is *horribly* inefficient.
for (auto& span : document().spans()) {
if (!span.range.contains(physical_position))
continue;
color = span.attributes.color;
if (span.attributes.bold) {
if (auto bold_font = Gfx::FontDatabase::the().get(font->family(), font->presentation_size(), 700))
font = bold_font;
}
background_color = span.attributes.background_color;
underline = span.attributes.underline;
break;
}
character_rect.set_width(font->glyph_width(code_point) + font->glyph_spacing());
if (background_color.has_value())
painter.fill_rect(character_rect, background_color.value());
painter.draw_text(character_rect, visual_line_text.substring_view(i, 1), *font, m_text_alignment, color);
if (underline) {
painter.draw_line(character_rect.bottom_left().translated(0, 1), character_rect.bottom_right().translated(0, 1), color);
}
character_rect.move_by(character_rect.width(), 0);
}
}
if (m_visualize_trailing_whitespace && line.ends_in_whitespace()) {
size_t physical_column;
auto last_non_whitespace_column = line.last_non_whitespace_column();
if (last_non_whitespace_column.has_value())
physical_column = last_non_whitespace_column.value() + 1;
else
physical_column = 0;
size_t end_of_visual_line = (start_of_visual_line + visual_line_text.length());
if (physical_column < end_of_visual_line) {
size_t visual_column = physical_column > start_of_visual_line ? (physical_column - start_of_visual_line) : 0;
Gfx::IntRect whitespace_rect {
content_x_for_position({ line_index, visual_column }),
visual_line_rect.y(),
font().width(visual_line_text.substring_view(visual_column, visual_line_text.length() - visual_column)),
visual_line_rect.height()
};
painter.fill_rect_with_dither_pattern(whitespace_rect, Color(), Color(255, 192, 192));
}
}
if (physical_line_has_selection) {
size_t start_of_selection_within_visual_line = (size_t)max(0, (int)selection_start_column_within_line - (int)start_of_visual_line);
size_t end_of_selection_within_visual_line = selection_end_column_within_line - start_of_visual_line;
bool current_visual_line_has_selection = start_of_selection_within_visual_line != end_of_selection_within_visual_line
&& ((line_index != selection.start().line() && line_index != selection.end().line())
|| (visual_line_index >= first_visual_line_with_selection && visual_line_index <= last_visual_line_with_selection));
if (current_visual_line_has_selection) {
bool selection_begins_on_current_visual_line = visual_line_index == first_visual_line_with_selection;
bool selection_ends_on_current_visual_line = visual_line_index == last_visual_line_with_selection;
int selection_left = selection_begins_on_current_visual_line
? content_x_for_position({ line_index, (size_t)selection_start_column_within_line })
: m_horizontal_content_padding;
int selection_right = selection_ends_on_current_visual_line
? content_x_for_position({ line_index, (size_t)selection_end_column_within_line })
: visual_line_rect.right() + 1;
Gfx::IntRect selection_rect {
selection_left,
visual_line_rect.y(),
selection_right - selection_left,
visual_line_rect.height()
};
Color background_color = is_focused() ? palette().selection() : palette().inactive_selection();
Color text_color = is_focused() ? palette().selection_text() : palette().inactive_selection_text();
painter.fill_rect(selection_rect, background_color);
if (visual_line_text.code_points()) {
Utf32View visual_selected_text {
visual_line_text.code_points() + start_of_selection_within_visual_line,
end_of_selection_within_visual_line - start_of_selection_within_visual_line
};
painter.draw_text(selection_rect, visual_selected_text, Gfx::TextAlignment::CenterLeft, text_color);
}
}
}
++visual_line_index;
return IterationDecision::Continue;
});
}
if (!is_multi_line() && m_icon) {
Gfx::IntRect icon_rect { icon_padding(), 1, icon_size(), icon_size() };
painter.draw_scaled_bitmap(icon_rect, *m_icon, m_icon->rect());
}
if (is_focused() && m_cursor_state && !is_displayonly())
painter.fill_rect(cursor_content_rect(), palette().text_cursor());
}
void TextEditor::select_all()
{
TextPosition start_of_document { 0, 0 };
TextPosition end_of_document { line_count() - 1, line(line_count() - 1).length() };
m_selection.set(end_of_document, start_of_document);
did_update_selection();
set_cursor(start_of_document);
update();
}
void TextEditor::keydown_event(KeyEvent& event)
{
TemporaryChange change { m_should_keep_autocomplete_box, true };
if (m_autocomplete_box && m_autocomplete_box->is_visible() && (event.key() == KeyCode::Key_Return || event.key() == KeyCode::Key_Tab)) {
m_autocomplete_box->apply_suggestion();
m_autocomplete_box->close();
return;
}
if (m_autocomplete_box && m_autocomplete_box->is_visible() && event.key() == KeyCode::Key_Escape) {
m_autocomplete_box->close();
return;
}
if (m_autocomplete_box && m_autocomplete_box->is_visible() && event.key() == KeyCode::Key_Up) {
m_autocomplete_box->previous_suggestion();
return;
}
if (m_autocomplete_box && m_autocomplete_box->is_visible() && event.key() == KeyCode::Key_Down) {
m_autocomplete_box->next_suggestion();
return;
}
if (is_single_line()) {
if (event.key() == KeyCode::Key_Tab)
return ScrollableWidget::keydown_event(event);
if (event.key() == KeyCode::Key_Return) {
if (on_return_pressed)
on_return_pressed();
return;
}
if (event.key() == KeyCode::Key_Up) {
if (on_up_pressed)
on_up_pressed();
return;
}
if (event.key() == KeyCode::Key_Down) {
if (on_down_pressed)
on_down_pressed();
return;
}
if (event.key() == KeyCode::Key_PageUp) {
if (on_pageup_pressed)
on_pageup_pressed();
return;
}
if (event.key() == KeyCode::Key_PageDown) {
if (on_pagedown_pressed)
on_pagedown_pressed();
return;
}
} else if (is_multi_line()) {
ArmedScopeGuard update_autocomplete { [&] {
if (m_autocomplete_box && m_autocomplete_box->is_visible()) {
m_autocomplete_provider->provide_completions([&](auto completions) {
m_autocomplete_box->update_suggestions(move(completions));
});
}
} };
if (!event.shift() && !event.alt() && event.ctrl() && event.key() == KeyCode::Key_Space) {
if (m_autocomplete_provider) {
try_show_autocomplete();
update_autocomplete.disarm();
return;
}
}
} else {
ASSERT_NOT_REACHED();
}
if (m_editing_engine->on_key(event))
return;
if (event.key() == KeyCode::Key_Escape) {
if (on_escape_pressed)
on_escape_pressed();
return;
}
if (event.modifiers() == Mod_Shift && event.key() == KeyCode::Key_Delete) {
if (m_autocomplete_box)
m_autocomplete_box->close();
return;
}
if (event.key() == KeyCode::Key_Delete) {
if (m_autocomplete_box)
m_autocomplete_box->close();
return;
}
if (event.key() == KeyCode::Key_Backspace) {
if (!is_editable())
return;
if (m_autocomplete_box)
m_autocomplete_box->close();
if (has_selection()) {
delete_selection();
did_update_selection();
return;
}
if (m_cursor.column() > 0) {
int erase_count = 1;
if (event.modifiers() == Mod_Ctrl) {
auto word_break_pos = document().first_word_break_before(m_cursor, true);
erase_count = m_cursor.column() - word_break_pos.column();
} else if (current_line().first_non_whitespace_column() >= m_cursor.column()) {
int new_column;
if (m_cursor.column() % m_soft_tab_width == 0)
new_column = m_cursor.column() - m_soft_tab_width;
else
new_column = (m_cursor.column() / m_soft_tab_width) * m_soft_tab_width;
erase_count = m_cursor.column() - new_column;
}
// Backspace within line
TextRange erased_range({ m_cursor.line(), m_cursor.column() - erase_count }, m_cursor);
auto erased_text = document().text_in_range(erased_range);
execute<RemoveTextCommand>(erased_text, erased_range);
return;
}
if (m_cursor.column() == 0 && m_cursor.line() != 0) {
// Backspace at column 0; merge with previous line
size_t previous_length = line(m_cursor.line() - 1).length();
TextRange erased_range({ m_cursor.line() - 1, previous_length }, m_cursor);
execute<RemoveTextCommand>("\n", erased_range);
return;
}
return;
}
if (!event.ctrl() && !event.alt() && event.code_point() != 0) {
add_code_point(event.code_point());
return;
}
event.ignore();
}
void TextEditor::delete_current_line()
{
if (has_selection())
return delete_selection();
TextPosition start;
TextPosition end;
if (m_cursor.line() == 0 && line_count() == 1) {
start = { 0, 0 };
end = { 0, line(0).length() };
} else if (m_cursor.line() == line_count() - 1) {
start = { m_cursor.line() - 1, line(m_cursor.line()).length() };
end = { m_cursor.line(), line(m_cursor.line()).length() };
} else {
start = { m_cursor.line(), 0 };
end = { m_cursor.line() + 1, 0 };
}
TextRange erased_range(start, end);
execute<RemoveTextCommand>(document().text_in_range(erased_range), erased_range);
}
void TextEditor::do_delete()
{
if (!is_editable())
return;
if (has_selection())
return delete_selection();
if (m_cursor.column() < current_line().length()) {
// Delete within line
TextRange erased_range(m_cursor, { m_cursor.line(), m_cursor.column() + 1 });
execute<RemoveTextCommand>(document().text_in_range(erased_range), erased_range);
return;
}
if (m_cursor.column() == current_line().length() && m_cursor.line() != line_count() - 1) {
// Delete at end of line; merge with next line
TextRange erased_range(m_cursor, { m_cursor.line() + 1, 0 });
execute<RemoveTextCommand>(document().text_in_range(erased_range), erased_range);
return;
}
}
void TextEditor::add_code_point(u32 code_point)
{
if (!is_editable())
return;
StringBuilder sb;
sb.append_code_point(code_point);
if (should_autocomplete_automatically()) {
if (sb.string_view().is_whitespace())
m_autocomplete_timer->stop();
else
m_autocomplete_timer->start();
}
insert_at_cursor_or_replace_selection(sb.to_string());
};
void TextEditor::reset_cursor_blink()
{
m_cursor_state = true;
update_cursor();
stop_timer();
start_timer(500);
}
void TextEditor::toggle_selection_if_needed_for_event(bool is_selecting)
{
if (is_selecting && !selection()->is_valid()) {
selection()->set(cursor(), {});
did_update_selection();
update();
return;
}
if (!is_selecting && selection()->is_valid()) {
selection()->clear();
did_update_selection();
update();
return;
}
if (is_selecting && selection()->start().is_valid()) {
selection()->set_end(cursor());
did_update_selection();
update();
return;
}
}
int TextEditor::content_x_for_position(const TextPosition& position) const
{
auto& line = this->line(position.line());
int x_offset = 0;
switch (m_text_alignment) {
case Gfx::TextAlignment::CenterLeft:
for_each_visual_line(position.line(), [&](const Gfx::IntRect&, auto& visual_line_view, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
size_t offset_in_visual_line = position.column() - start_of_visual_line;
if (position.column() >= start_of_visual_line && (offset_in_visual_line <= visual_line_view.length())) {
if (offset_in_visual_line == 0) {
x_offset = 0;
} else {
x_offset = font().width(visual_line_view.substring_view(0, offset_in_visual_line));
x_offset += font().glyph_spacing();
}
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return m_horizontal_content_padding + ((is_single_line() && icon()) ? (icon_size() + icon_padding()) : 0) + x_offset;
case Gfx::TextAlignment::CenterRight:
// FIXME
ASSERT(!is_line_wrapping_enabled());
return content_width() - m_horizontal_content_padding - (line.length() * fixed_glyph_width()) + (position.column() * fixed_glyph_width());
default:
ASSERT_NOT_REACHED();
}
}
Gfx::IntRect TextEditor::content_rect_for_position(const TextPosition& position) const
{
if (!position.is_valid())
return {};
ASSERT(!lines().is_empty());
ASSERT(position.column() <= (current_line().length() + 1));
int x = content_x_for_position(position);
if (is_single_line()) {
Gfx::IntRect rect { x, 0, 1, line_height() };
rect.center_vertically_within({ {}, frame_inner_rect().size() });
return rect;
}
Gfx::IntRect rect;
for_each_visual_line(position.line(), [&](const Gfx::IntRect& visual_line_rect, auto& view, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
if (position.column() >= start_of_visual_line && ((position.column() - start_of_visual_line) <= view.length())) {
// NOTE: We have to subtract the horizontal padding here since it's part of the visual line rect
// *and* included in what we get from content_x_for_position().
rect = {
visual_line_rect.x() + x - (m_horizontal_content_padding),
visual_line_rect.y(),
m_editing_engine->cursor_width() == CursorWidth::WIDE ? 7 : 1,
line_height()
};
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return rect;
}
Gfx::IntRect TextEditor::cursor_content_rect() const
{
return content_rect_for_position(m_cursor);
}
Gfx::IntRect TextEditor::line_widget_rect(size_t line_index) const
{
auto rect = line_content_rect(line_index);
rect.set_x(frame_thickness());
rect.set_width(frame_inner_rect().width());
rect.move_by(0, -(vertical_scrollbar().value()));
rect.move_by(0, frame_thickness());
rect.intersect(frame_inner_rect());
return rect;
}
void TextEditor::scroll_position_into_view(const TextPosition& position)
{
auto rect = content_rect_for_position(position);
if (position.column() == 0)
rect.set_x(content_x_for_position({ position.line(), 0 }) - 2);
else if (position.column() == line(position.line()).length())
rect.set_x(content_x_for_position({ position.line(), line(position.line()).length() }) + 2);
scroll_into_view(rect, true, true);
}
void TextEditor::scroll_cursor_into_view()
{
if (!m_reflow_deferred)
scroll_position_into_view(m_cursor);
}
Gfx::IntRect TextEditor::line_content_rect(size_t line_index) const
{
auto& line = this->line(line_index);
if (is_single_line()) {
Gfx::IntRect line_rect = { content_x_for_position({ line_index, 0 }), 0, font().width(line.view()), font().glyph_height() + 4 };
line_rect.center_vertically_within({ {}, frame_inner_rect().size() });
return line_rect;
}
if (is_line_wrapping_enabled())
return m_line_visual_data[line_index].visual_rect;
return {
content_x_for_position({ line_index, 0 }),
(int)line_index * line_height(),
font().width(line.view()),
line_height()
};
}
void TextEditor::set_cursor_and_focus_line(size_t line, size_t column)
{
u_int index_max = line_count() - 1;
set_cursor(line, column);
if (line > 1 && line < index_max) {
int headroom = frame_inner_rect().height() / 3;
do {
auto line_data = m_line_visual_data[line];
headroom -= line_data.visual_rect.height();
line--;
} while (line > 0 && headroom > 0);
Gfx::IntRect rect = { 0, line_content_rect(line).y(),
1, frame_inner_rect().height() };
scroll_into_view(rect, false, true);
}
}
void TextEditor::update_cursor()
{
update(line_widget_rect(m_cursor.line()));
}
void TextEditor::set_cursor(size_t line, size_t column)
{
set_cursor({ line, column });
}
void TextEditor::set_cursor(const TextPosition& a_position)
{
ASSERT(!lines().is_empty());
TextPosition position = a_position;
if (position.line() >= line_count())
position.set_line(line_count() - 1);
if (position.column() > lines()[position.line()].length())
position.set_column(lines()[position.line()].length());
if (m_cursor != position && is_visual_data_up_to_date()) {
// NOTE: If the old cursor is no longer valid, repaint everything just in case.
auto old_cursor_line_rect = m_cursor.line() < line_count()
? line_widget_rect(m_cursor.line())
: rect();
m_cursor = position;
m_cursor_state = true;
scroll_cursor_into_view();
update(old_cursor_line_rect);
update_cursor();
} else if (m_cursor != position) {
m_cursor = position;
m_cursor_state = true;
}
cursor_did_change();
if (on_cursor_change)
on_cursor_change();
if (m_highlighter)
m_highlighter->cursor_did_change();
}
void TextEditor::focusin_event(FocusEvent& event)
{
if (event.source() == FocusSource::Keyboard)
select_all();
m_cursor_state = true;
update_cursor();
stop_timer();
start_timer(500);
if (on_focusin)
on_focusin();
}
void TextEditor::focusout_event(FocusEvent&)
{
stop_timer();
if (on_focusout)
on_focusout();
}
void TextEditor::timer_event(Core::TimerEvent&)
{
m_cursor_state = !m_cursor_state;
if (is_focused())
update_cursor();
}
bool TextEditor::write_to_file(const String& path)
{
int fd = open(path.characters(), O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (fd < 0) {
perror("open");
return false;
}
// Compute the final file size and ftruncate() to make writing fast.
// FIXME: Remove this once the kernel is smart enough to do this instead.
off_t file_size = 0;
for (size_t i = 0; i < line_count(); ++i)
file_size += line(i).length();
file_size += line_count() - 1;
int rc = ftruncate(fd, file_size);
if (rc < 0) {
perror("ftruncate");
return false;
}
for (size_t i = 0; i < line_count(); ++i) {
auto& line = this->line(i);
if (line.length()) {
auto line_as_utf8 = line.to_utf8();
ssize_t nwritten = write(fd, line_as_utf8.characters(), line_as_utf8.length());
if (nwritten < 0) {
perror("write");
close(fd);
return false;
}
}
if (i != line_count() - 1) {
char ch = '\n';
ssize_t nwritten = write(fd, &ch, 1);
if (nwritten != 1) {
perror("write");
close(fd);
return false;
}
}
}
close(fd);
return true;
}
String TextEditor::text() const
{
return document().text();
}
void TextEditor::clear()
{
document().remove_all_lines();
document().append_line(make<TextDocumentLine>(document()));
m_selection.clear();
did_update_selection();
set_cursor(0, 0);
update();
}
String TextEditor::selected_text() const
{
if (!has_selection())
return {};
return document().text_in_range(m_selection);
}
void TextEditor::delete_selection()
{
auto selection = normalized_selection();
execute<RemoveTextCommand>(selected_text(), selection);
m_selection.clear();
did_update_selection();
did_change();
set_cursor(selection.start());
update();
}
void TextEditor::insert_at_cursor_or_replace_selection(const StringView& text)
{
ReflowDeferrer defer(*this);
ASSERT(is_editable());
if (has_selection())
delete_selection();
execute<InsertTextCommand>(text, m_cursor);
}
void TextEditor::cut()
{
if (!is_editable())
return;
auto selected_text = this->selected_text();
printf("Cut: \"%s\"\n", selected_text.characters());
Clipboard::the().set_plain_text(selected_text);
delete_selection();
}
void TextEditor::copy()
{
auto selected_text = this->selected_text();
printf("Copy: \"%s\"\n", selected_text.characters());
Clipboard::the().set_plain_text(selected_text);
}
void TextEditor::paste()
{
if (!is_editable())
return;
auto paste_text = Clipboard::the().data();
printf("Paste: \"%s\"\n", String::copy(paste_text).characters());
TemporaryChange change(m_automatic_indentation_enabled, false);
insert_at_cursor_or_replace_selection(paste_text);
}
void TextEditor::defer_reflow()
{
++m_reflow_deferred;
}
void TextEditor::undefer_reflow()
{
ASSERT(m_reflow_deferred);
if (!--m_reflow_deferred) {
if (m_reflow_requested) {
recompute_all_visual_lines();
scroll_cursor_into_view();
}
}
}
void TextEditor::try_show_autocomplete()
{
if (m_autocomplete_provider) {
m_autocomplete_provider->provide_completions([&](auto completions) {
auto has_completions = !completions.is_empty();
m_autocomplete_box->update_suggestions(move(completions));
auto position = content_rect_for_position(cursor()).bottom_right().translated(screen_relative_rect().top_left().translated(ruler_width(), 0).translated(10, 5));
if (has_completions)
m_autocomplete_box->show(position);
});
}
}
void TextEditor::enter_event(Core::Event&)
{
m_automatic_selection_scroll_timer->stop();
}
void TextEditor::leave_event(Core::Event&)
{
if (m_in_drag_select)
m_automatic_selection_scroll_timer->start();
if (m_autocomplete_timer)
m_autocomplete_timer->stop();
if (m_autocomplete_box)
m_autocomplete_box->close();
}
void TextEditor::did_change()
{
update_content_size();
recompute_all_visual_lines();
m_undo_action->set_enabled(can_undo());
m_redo_action->set_enabled(can_redo());
if (m_autocomplete_box && !m_should_keep_autocomplete_box) {
m_autocomplete_timer->stop();
m_autocomplete_box->close();
}
if (!m_has_pending_change_notification) {
m_has_pending_change_notification = true;
deferred_invoke([this](auto&) {
if (!m_has_pending_change_notification)
return;
if (on_change)
on_change();
if (m_highlighter)
m_highlighter->rehighlight(palette());
m_has_pending_change_notification = false;
});
}
}
void TextEditor::set_mode(const Mode mode)
{
if (m_mode == mode)
return;
m_mode = mode;
switch (mode) {
case Editable:
m_cut_action->set_enabled(true && has_selection());
m_delete_action->set_enabled(true);
m_paste_action->set_enabled(true);
set_accepts_emoji_input(true);
break;
case DisplayOnly:
case ReadOnly:
m_cut_action->set_enabled(false && has_selection());
m_delete_action->set_enabled(false);
m_paste_action->set_enabled(false);
set_accepts_emoji_input(false);
break;
default:
ASSERT_NOT_REACHED();
}
if (!is_displayonly())
set_override_cursor(Gfx::StandardCursor::IBeam);
else
set_override_cursor(Gfx::StandardCursor::None);
}
void TextEditor::set_has_visible_list(bool visible)
{
if (m_has_visible_list == visible)
return;
m_has_visible_list = visible;
}
void TextEditor::did_update_selection()
{
m_cut_action->set_enabled(is_editable() && has_selection());
m_copy_action->set_enabled(has_selection());
if (on_selection_change)
on_selection_change();
if (is_line_wrapping_enabled()) {
// FIXME: Try to repaint less.
update();
}
}
void TextEditor::context_menu_event(ContextMenuEvent& event)
{
if (is_displayonly())
return;
if (!m_context_menu) {
m_context_menu = Menu::construct();
m_context_menu->add_action(undo_action());
m_context_menu->add_action(redo_action());
m_context_menu->add_separator();
m_context_menu->add_action(cut_action());
m_context_menu->add_action(copy_action());
m_context_menu->add_action(paste_action());
m_context_menu->add_action(delete_action());
m_context_menu->add_separator();
m_context_menu->add_action(select_all_action());
if (is_multi_line()) {
m_context_menu->add_separator();
m_context_menu->add_action(go_to_line_action());
}
if (!m_custom_context_menu_actions.is_empty()) {
m_context_menu->add_separator();
for (auto& action : m_custom_context_menu_actions) {
m_context_menu->add_action(action);
}
}
}
m_context_menu->popup(event.screen_position());
}
void TextEditor::set_text_alignment(Gfx::TextAlignment alignment)
{
if (m_text_alignment == alignment)
return;
m_text_alignment = alignment;
update();
}
void TextEditor::resize_event(ResizeEvent& event)
{
ScrollableWidget::resize_event(event);
update_content_size();
recompute_all_visual_lines();
}
void TextEditor::theme_change_event(ThemeChangeEvent& event)
{
ScrollableWidget::theme_change_event(event);
if (m_highlighter)
m_highlighter->rehighlight(palette());
}
void TextEditor::set_selection(const TextRange& selection)
{
if (m_selection == selection)
return;
m_selection = selection;
set_cursor(m_selection.end());
scroll_position_into_view(normalized_selection().start());
update();
}
void TextEditor::clear_selection()
{
if (!has_selection())
return;
m_selection.clear();
update();
}
void TextEditor::recompute_all_visual_lines()
{
if (m_reflow_deferred) {
m_reflow_requested = true;
return;
}
m_reflow_requested = false;
int y_offset = 0;
for (size_t line_index = 0; line_index < line_count(); ++line_index) {
recompute_visual_lines(line_index);
m_line_visual_data[line_index].visual_rect.set_y(y_offset);
y_offset += m_line_visual_data[line_index].visual_rect.height();
}
update_content_size();
}
void TextEditor::ensure_cursor_is_valid()
{
auto new_cursor = m_cursor;
if (new_cursor.line() >= line_count())
new_cursor.set_line(line_count() - 1);
if (new_cursor.column() > line(new_cursor.line()).length())
new_cursor.set_column(line(new_cursor.line()).length());
if (m_cursor != new_cursor)
set_cursor(new_cursor);
}
size_t TextEditor::visual_line_containing(size_t line_index, size_t column) const
{
size_t visual_line_index = 0;
for_each_visual_line(line_index, [&](const Gfx::IntRect&, auto& view, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
if (column >= start_of_visual_line && ((column - start_of_visual_line) < view.length()))
return IterationDecision::Break;
++visual_line_index;
return IterationDecision::Continue;
});
return visual_line_index;
}
void TextEditor::recompute_visual_lines(size_t line_index)
{
auto& line = document().line(line_index);
auto& visual_data = m_line_visual_data[line_index];
visual_data.visual_line_breaks.clear_with_capacity();
int available_width = visible_text_rect_in_inner_coordinates().width();
if (is_line_wrapping_enabled()) {
int line_width_so_far = 0;
auto glyph_spacing = font().glyph_spacing();
for (size_t i = 0; i < line.length(); ++i) {
auto code_point = line.code_points()[i];
auto glyph_width = font().glyph_or_emoji_width(code_point);
if ((line_width_so_far + glyph_width + glyph_spacing) > available_width) {
visual_data.visual_line_breaks.append(i);
line_width_so_far = glyph_width + glyph_spacing;
continue;
}
line_width_so_far += glyph_width + glyph_spacing;
}
}
visual_data.visual_line_breaks.append(line.length());
if (is_line_wrapping_enabled())
visual_data.visual_rect = { m_horizontal_content_padding, 0, available_width, static_cast<int>(visual_data.visual_line_breaks.size()) * line_height() };
else
visual_data.visual_rect = { m_horizontal_content_padding, 0, font().width(line.view()), line_height() };
}
template<typename Callback>
void TextEditor::for_each_visual_line(size_t line_index, Callback callback) const
{
auto editor_visible_text_rect = visible_text_rect_in_inner_coordinates();
size_t start_of_line = 0;
size_t visual_line_index = 0;
auto& line = document().line(line_index);
auto& visual_data = m_line_visual_data[line_index];
for (auto visual_line_break : visual_data.visual_line_breaks) {
auto visual_line_view = Utf32View(line.code_points() + start_of_line, visual_line_break - start_of_line);
Gfx::IntRect visual_line_rect {
visual_data.visual_rect.x(),
visual_data.visual_rect.y() + ((int)visual_line_index * line_height()),
font().width(visual_line_view) + font().glyph_spacing(),
line_height()
};
if (is_right_text_alignment(text_alignment()))
visual_line_rect.set_right_without_resize(editor_visible_text_rect.right());
if (is_single_line()) {
visual_line_rect.center_vertically_within(editor_visible_text_rect);
if (m_icon)
visual_line_rect.move_by(icon_size() + icon_padding(), 0);
}
if (callback(visual_line_rect, visual_line_view, start_of_line, visual_line_index == visual_data.visual_line_breaks.size() - 1) == IterationDecision::Break)
break;
start_of_line = visual_line_break;
++visual_line_index;
}
}
void TextEditor::set_line_wrapping_enabled(bool enabled)
{
if (m_line_wrapping_enabled == enabled)
return;
m_line_wrapping_enabled = enabled;
horizontal_scrollbar().set_visible(!m_line_wrapping_enabled);
update_content_size();
recompute_all_visual_lines();
update();
}
void TextEditor::add_custom_context_menu_action(Action& action)
{
m_custom_context_menu_actions.append(action);
}
void TextEditor::did_change_font()
{
vertical_scrollbar().set_step(line_height());
recompute_all_visual_lines();
update();
ScrollableWidget::did_change_font();
}
void TextEditor::document_did_append_line()
{
m_line_visual_data.append(make<LineVisualData>());
recompute_all_visual_lines();
update();
}
void TextEditor::document_did_remove_line(size_t line_index)
{
m_line_visual_data.remove(line_index);
recompute_all_visual_lines();
update();
}
void TextEditor::document_did_remove_all_lines()
{
m_line_visual_data.clear();
recompute_all_visual_lines();
update();
}
void TextEditor::document_did_insert_line(size_t line_index)
{
m_line_visual_data.insert(line_index, make<LineVisualData>());
recompute_all_visual_lines();
update();
}
void TextEditor::document_did_change()
{
did_change();
update();
}
void TextEditor::document_did_set_text()
{
m_line_visual_data.clear();
for (size_t i = 0; i < m_document->line_count(); ++i)
m_line_visual_data.append(make<LineVisualData>());
document_did_change();
}
void TextEditor::document_did_set_cursor(const TextPosition& position)
{
set_cursor(position);
}
void TextEditor::set_document(TextDocument& document)
{
if (m_document.ptr() == &document)
return;
if (m_document)
m_document->unregister_client(*this);
m_document = document;
m_line_visual_data.clear();
for (size_t i = 0; i < m_document->line_count(); ++i) {
m_line_visual_data.append(make<LineVisualData>());
}
set_cursor(0, 0);
if (has_selection())
m_selection.clear();
recompute_all_visual_lines();
update();
m_document->register_client(*this);
}
void TextEditor::flush_pending_change_notification_if_needed()
{
if (!m_has_pending_change_notification)
return;
if (on_change)
on_change();
if (m_highlighter)
m_highlighter->rehighlight(palette());
m_has_pending_change_notification = false;
}
const SyntaxHighlighter* TextEditor::syntax_highlighter() const
{
return m_highlighter.ptr();
}
void TextEditor::set_syntax_highlighter(OwnPtr<SyntaxHighlighter> highlighter)
{
if (m_highlighter)
m_highlighter->detach();
m_highlighter = move(highlighter);
if (m_highlighter) {
m_highlighter->attach(*this);
m_highlighter->rehighlight(palette());
} else
document().set_spans({});
}
const AutocompleteProvider* TextEditor::autocomplete_provider() const
{
return m_autocomplete_provider.ptr();
}
void TextEditor::set_autocomplete_provider(OwnPtr<AutocompleteProvider>&& provider)
{
if (m_autocomplete_provider)
m_autocomplete_provider->detach();
m_autocomplete_provider = move(provider);
if (m_autocomplete_provider) {
m_autocomplete_provider->attach(*this);
if (!m_autocomplete_box)
m_autocomplete_box = make<AutocompleteBox>(*this);
}
if (m_autocomplete_box)
m_autocomplete_box->close();
}
const EditingEngine* TextEditor::editing_engine() const
{
return m_editing_engine.ptr();
}
void TextEditor::set_editing_engine(OwnPtr<EditingEngine> editing_engine)
{
if (m_editing_engine)
m_editing_engine->detach();
m_editing_engine = move(editing_engine);
ASSERT(m_editing_engine);
m_editing_engine->attach(*this);
m_cursor_state = true;
update_cursor();
stop_timer();
start_timer(500);
}
int TextEditor::line_height() const
{
return font().glyph_height() + m_line_spacing;
}
int TextEditor::fixed_glyph_width() const
{
ASSERT(font().is_fixed_width());
return font().glyph_width(' ');
}
void TextEditor::set_icon(const Gfx::Bitmap* icon)
{
if (m_icon == icon)
return;
m_icon = icon;
update();
}
void TextEditor::set_visualize_trailing_whitespace(bool enabled)
{
if (m_visualize_trailing_whitespace == enabled)
return;
m_visualize_trailing_whitespace = enabled;
update();
}
void TextEditor::set_should_autocomplete_automatically(bool value)
{
if (value == should_autocomplete_automatically())
return;
if (value) {
ASSERT(m_autocomplete_provider);
m_autocomplete_timer = Core::Timer::create_single_shot(m_automatic_autocomplete_delay_ms, [this] { try_show_autocomplete(); });
return;
}
remove_child(*m_autocomplete_timer);
m_autocomplete_timer = nullptr;
}
int TextEditor::number_of_visible_lines() const
{
return visible_content_rect().height() / line_height();
}
}
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