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ladybird/Userland/Libraries/LibGUI/TextEditor.cpp
Sam Atkins 6f92d1e639 LibGUI: Set TextEditor to unmodified after saving size=0 files 
This fixes #7946

Previously, TextEditor::write_to_file() would not mark its document
as unmodified if the file size was 0. This caused a desync in the
Text Editor app between the window's is_modified state and the
TextEditor's. It's already noted in the comments of the app's
save action code that propagating the modified state automatically
would be good, and it would solve issues like this, but I'm not yet
familiar enough with the code to try a change like that.
2021-06-09 18:53:13 +02:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/CharacterTypes.h>
#include <AK/Debug.h>
#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/TextEditor.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Font.h>
#include <LibGfx/FontDatabase.h>
#include <LibGfx/Palette.h>
#include <LibSyntax/Highlighter.h>
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <unistd.h>
REGISTER_WIDGET(GUI, TextEditor)
namespace GUI {
TextEditor::TextEditor(Type type)
: m_type(type)
{
REGISTER_STRING_PROPERTY("text", text, set_text);
REGISTER_STRING_PROPERTY("placeholder", placeholder, set_placeholder);
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(window(), value, "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.translate_by(-(icon_size() + icon_padding()), 0);
size_t line_index = 0;
if (position.y() >= 0) {
if (is_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.
VERIFY(!is_wrapping_enabled());
column_index = (position.x() - content_x_for_position({ line_index, 0 }) + fixed_glyph_width() / 2) / fixed_glyph_width();
break;
default:
VERIFY_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.translate_by(horizontal_scrollbar().value(), vertical_scrollbar().value());
content_position.translate_by(-(m_horizontal_content_padding + ruler_width()), 0);
content_position.translate_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;
if (!current_line().can_select())
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()) {
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.translate_by(-ruler_width(), 0);
text_clip_rect.translate_by(horizontal_scrollbar().value(), vertical_scrollbar().value());
painter.add_clip_rect(text_clip_rect);
size_t span_index = 0;
if (document().has_spans()) {
for (;;) {
if (span_index >= document().spans().size() || document().spans()[span_index].range.end().line() >= first_visible_line) {
break;
}
++span_index;
}
}
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));
if constexpr (TEXTEDITOR_DEBUG)
painter.draw_rect(visual_line_rect, Color::Cyan);
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())
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 {
auto unspanned_color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
if (is_displayonly() && is_focused())
unspanned_color = palette().color(is_enabled() ? Gfx::ColorRole::SelectionText : Gfx::ColorRole::DisabledText);
RefPtr<Gfx::Font> unspanned_font = this->font();
size_t next_column = 0;
Gfx::IntRect span_rect = { visual_line_rect.location(), { 0, line_height() } };
auto draw_text_helper = [&](size_t start, size_t end, RefPtr<Gfx::Font>& font, Color& color, Optional<Color> background_color = {}, bool underline = false) {
size_t length = end - start;
if (length == 0)
return;
auto text = visual_line_text.substring_view(start, length);
span_rect.set_width(font->width(text));
if (background_color.has_value()) {
painter.fill_rect(span_rect, background_color.value());
}
painter.draw_text(span_rect, text, *font, m_text_alignment, color);
if (underline) {
painter.draw_line(span_rect.bottom_left().translated(0, 1), span_rect.bottom_right().translated(0, 1), color);
}
span_rect.translate_by(span_rect.width(), 0);
};
for (;;) {
if (span_index >= document().spans().size()) {
break;
}
auto& span = document().spans()[span_index];
if (!span.range.is_valid()) {
++span_index;
continue;
}
if (span.range.end().line() < line_index) {
dbgln_if(TEXTEDITOR_DEBUG, "spans not sorted (span end {}:{} is before current line {}) => ignoring", span.range.end().line(), span.range.end().column(), line_index);
++span_index;
continue;
}
if (span.range.start().line() > line_index
|| (span.range.start().line() == line_index && span.range.start().column() >= start_of_visual_line + visual_line_text.length())) {
// no more spans in this line, moving on
break;
}
if (span.range.start().line() == span.range.end().line() && span.range.end().column() < span.range.start().column()) {
dbgln_if(TEXTEDITOR_DEBUG, "span form {}:{} to {}:{} has negative length => ignoring", span.range.start().line(), span.range.start().column(), span.range.end().line(), span.range.end().column());
++span_index;
continue;
}
if (span.range.end().line() == line_index && span.range.end().column() < start_of_visual_line + next_column) {
dbgln_if(TEXTEDITOR_DEBUG, "spans not sorted (span end {}:{} is before current position {}:{}) => ignoring",
span.range.end().line(), span.range.end().column(), line_index, start_of_visual_line + next_column);
++span_index;
continue;
}
size_t span_start;
if (span.range.start().line() < line_index || span.range.start().column() < start_of_visual_line) {
span_start = 0;
} else {
span_start = span.range.start().column() - start_of_visual_line;
}
if (span_start < next_column) {
dbgln_if(TEXTEDITOR_DEBUG, "span started before the current position, maybe two spans overlap? (span start {} is before current position {}) => ignoring", span_start, next_column);
++span_index;
continue;
}
size_t span_end;
bool span_consumned;
if (span.range.end().line() > line_index || span.range.end().column() > start_of_visual_line + visual_line_text.length()) {
span_end = visual_line_text.length();
span_consumned = false;
} else {
span_end = span.range.end().column() - start_of_visual_line;
span_consumned = true;
}
if (span_start != next_column) {
// draw unspanned text between spans
draw_text_helper(next_column, span_start, unspanned_font, unspanned_color);
}
auto font = unspanned_font;
if (span.attributes.bold) {
if (auto bold_font = Gfx::FontDatabase::the().get(font->family(), font->presentation_size(), 700))
font = bold_font;
}
draw_text_helper(span_start, span_end, font, span.attributes.color, span.attributes.background_color, span.attributes.underline);
next_column = span_end;
if (!span_consumned) {
// continue with same span on next line
break;
} else {
++span_index;
}
}
// draw unspanned text after last span
if (next_column < visual_line_text.length()) {
draw_text_helper(next_column, visual_line_text.length(), unspanned_font, unspanned_color);
}
// consume all spans that should end this line
// this is necessary since the spans can include the new line character
while (is_last_visual_line && span_index < document().spans().size()) {
auto& span = document().spans()[span_index];
if (span.range.end().line() == line_index) {
++span_index;
} else {
break;
}
}
}
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 (m_visualize_leading_whitespace && line.leading_spaces() > 0) {
size_t physical_column = line.leading_spaces();
size_t end_of_leading_whitespace = (start_of_visual_line + physical_column);
size_t end_of_visual_line = (start_of_visual_line + visual_line_text.length());
if (end_of_leading_whitespace < end_of_visual_line) {
Gfx::IntRect whitespace_rect {
content_x_for_position({ line_index, start_of_visual_line }),
visual_line_rect.y(),
font().width(visual_line_text.substring_view(0, end_of_leading_whitespace)),
visual_line_rect.height()
};
painter.fill_rect_with_dither_pattern(whitespace_rect, Color(), Color(192, 255, 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 AbstractScrollableWidget::keydown_event(event);
if (event.modifiers() == KeyModifier::Mod_Shift && event.key() == KeyCode::Key_Return) {
if (on_shift_return_pressed)
on_shift_return_pressed();
return;
}
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()) {
VERIFY_NOT_REACHED();
}
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 (is_multi_line() && !event.shift() && !event.alt() && event.ctrl() && event.key() == KeyCode::Key_Space) {
if (m_autocomplete_provider) {
try_show_autocomplete();
update_autocomplete.disarm();
return;
}
}
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() - 1).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::update_selection(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, bool is_last_visual_line) {
size_t offset_in_visual_line = position.column() - start_of_visual_line;
auto before_line_end = is_last_visual_line ? (offset_in_visual_line <= visual_line_view.length()) : (offset_in_visual_line < visual_line_view.length());
if (position.column() >= start_of_visual_line && before_line_end) {
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
VERIFY(!is_wrapping_enabled());
return content_width() - m_horizontal_content_padding - (line.length() * fixed_glyph_width()) + (position.column() * fixed_glyph_width());
default:
VERIFY_NOT_REACHED();
}
}
Gfx::IntRect TextEditor::content_rect_for_position(const TextPosition& position) const
{
if (!position.is_valid())
return {};
VERIFY(!lines().is_empty());
VERIFY(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, bool is_last_visual_line) {
auto before_line_end = is_last_visual_line ? ((position.column() - start_of_visual_line) <= view.length()) : ((position.column() - start_of_visual_line) < view.length());
if (position.column() >= start_of_visual_line && before_line_end) {
// 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.translate_by(0, -(vertical_scrollbar().value()));
rect.translate_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_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)
{
VERIFY(!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&)
{
if (is_displayonly() && has_selection())
m_selection.clear();
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;
}
ScopeGuard fd_guard = [fd] { close(fd); };
off_t file_size = 0;
if (line_count() == 1 && line(0).is_empty()) {
// Truncate to zero.
} else {
// Compute the final file size and ftruncate() to make writing fast.
// FIXME: Remove this once the kernel is smart enough to do this instead.
for (size_t i = 0; i < line_count(); ++i)
file_size += line(i).length();
file_size += line_count();
}
if (ftruncate(fd, file_size) < 0) {
perror("ftruncate");
return false;
}
if (file_size == 0) {
// A size 0 file doesn't need a data copy.
} else {
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");
return false;
}
}
char ch = '\n';
ssize_t nwritten = write(fd, &ch, 1);
if (nwritten != 1) {
perror("write");
return false;
}
}
}
document().set_unmodified();
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);
}
size_t TextEditor::number_of_selected_words() const
{
if (!has_selection())
return 0;
size_t word_count = 0;
bool in_word = false;
auto selected_text = this->selected_text();
for (char c : selected_text) {
if (in_word && is_ascii_space(c)) {
in_word = false;
word_count++;
continue;
}
if (!in_word && !is_ascii_space(c))
in_word = true;
}
if (in_word)
word_count++;
return word_count;
}
void TextEditor::delete_selection()
{
auto selection = normalized_selection();
auto selected = selected_text();
m_selection.clear();
execute<RemoveTextCommand>(selected, selection);
did_update_selection();
did_change();
set_cursor(selection.start());
update();
}
void TextEditor::delete_text_range(TextRange range)
{
auto normalized_range = range.normalized();
execute<RemoveTextCommand>(document().text_in_range(normalized_range), normalized_range);
did_change();
set_cursor(normalized_range.start());
update();
}
void TextEditor::insert_at_cursor_or_replace_selection(const StringView& text)
{
ReflowDeferrer defer(*this);
VERIFY(is_editable());
if (has_selection())
delete_selection();
// Check if adding a newline leaves the previous line as just whitespace.
auto const clear_length = m_cursor.column();
auto const should_clear_last_line = text == "\n"
&& clear_length > 0
&& current_line().leading_spaces() == clear_length;
execute<InsertTextCommand>(text, m_cursor);
if (should_clear_last_line) { // If it does leave just whitespace, clear it.
auto const original_cursor_position = cursor();
TextPosition start(original_cursor_position.line() - 1, 0);
TextPosition end(original_cursor_position.line() - 1, clear_length);
TextRange erased_range(start, end);
execute<RemoveTextCommand>(document().text_in_range(erased_range), erased_range);
set_cursor(original_cursor_position);
}
}
void TextEditor::cut()
{
if (!is_editable())
return;
auto selected_text = this->selected_text();
dbgln_if(TEXTEDITOR_DEBUG, "Cut: \"{}\"", selected_text);
Clipboard::the().set_plain_text(selected_text);
delete_selection();
}
void TextEditor::copy()
{
auto selected_text = this->selected_text();
dbgln_if(TEXTEDITOR_DEBUG, "Copy: \"{}\"\n", selected_text);
Clipboard::the().set_plain_text(selected_text);
}
void TextEditor::paste()
{
if (!is_editable())
return;
auto paste_text = Clipboard::the().data();
if (paste_text.is_empty())
return;
dbgln_if(TEXTEDITOR_DEBUG, "Paste: \"{}\"", String::copy(paste_text));
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()
{
VERIFY(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()).translated(0, -visible_content_rect().y()).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();
if (m_autocomplete_box && !m_should_keep_autocomplete_box) {
m_autocomplete_box->close();
if (m_autocomplete_timer)
m_autocomplete_timer->stop();
}
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:
VERIFY_NOT_REACHED();
}
if (!is_displayonly())
set_override_cursor(Gfx::StandardCursor::IBeam);
else
set_override_cursor(Gfx::StandardCursor::None);
}
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_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)
{
AbstractScrollableWidget::resize_event(event);
update_content_size();
recompute_all_visual_lines();
}
void TextEditor::theme_change_event(ThemeChangeEvent& event)
{
AbstractScrollableWidget::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_wrapping_enabled()) {
int line_width_so_far = 0;
size_t last_whitespace_index = 0;
size_t line_width_since_last_whitespace = 0;
auto glyph_spacing = font().glyph_spacing();
for (size_t i = 0; i < line.length(); ++i) {
auto code_point = line.code_points()[i];
if (is_ascii_space(code_point)) {
last_whitespace_index = i;
line_width_since_last_whitespace = 0;
}
auto glyph_width = font().glyph_or_emoji_width(code_point);
line_width_since_last_whitespace += glyph_width + glyph_spacing;
if ((line_width_so_far + glyph_width + glyph_spacing) > available_width) {
if (m_wrapping_mode == WrappingMode::WrapAtWords && last_whitespace_index != 0) {
// Plus 1 to get the first letter of the word.
visual_data.visual_line_breaks.append(last_whitespace_index + 1);
line_width_so_far = line_width_since_last_whitespace;
last_whitespace_index = 0;
line_width_since_last_whitespace = 0;
} else {
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_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.translate_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_wrapping_mode(WrappingMode mode)
{
if (m_wrapping_mode == mode)
return;
m_wrapping_mode = mode;
horizontal_scrollbar().set_visible(m_wrapping_mode == WrappingMode::NoWrap);
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();
AbstractScrollableWidget::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_update_undo_stack()
{
auto make_action_text = [](auto prefix, auto suffix) {
StringBuilder builder;
builder.append(prefix);
if (suffix.has_value()) {
builder.append(' ');
builder.append(suffix.value());
}
return builder.to_string();
};
m_undo_action->set_enabled(can_undo());
m_redo_action->set_enabled(can_redo());
m_undo_action->set_text(make_action_text("&Undo", document().undo_stack().undo_action_text()));
m_redo_action->set_text(make_action_text("&Redo", document().undo_stack().redo_action_text()));
// FIXME: This is currently firing more often than it should.
// Ideally we'd only send this out when the undo stack modified state actually changes.
if (on_modified_change)
on_modified_change(document().is_modified());
}
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 Syntax::Highlighter* TextEditor::syntax_highlighter() const
{
return m_highlighter.ptr();
}
void TextEditor::set_syntax_highlighter(OwnPtr<Syntax::Highlighter> 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);
VERIFY(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
{
VERIFY(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_visualize_leading_whitespace(bool enabled)
{
if (m_visualize_leading_whitespace == enabled)
return;
m_visualize_leading_whitespace = enabled;
update();
}
void TextEditor::set_should_autocomplete_automatically(bool value)
{
if (value == should_autocomplete_automatically())
return;
if (value) {
VERIFY(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();
}
void TextEditor::set_ruler_visible(bool visible)
{
if (m_ruler_visible == visible)
return;
m_ruler_visible = visible;
recompute_all_visual_lines();
update();
}
void TextEditor::undo()
{
clear_selection();
document().undo();
}
void TextEditor::redo()
{
clear_selection();
document().redo();
}
}
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