/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
* Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Badge.h>
#include <AK/CharacterTypes.h>
#include <AK/Debug.h>
#include <AK/QuickSort.h>
#include <AK/ScopeGuard.h>
#include <AK/StdLibExtras.h>
#include <AK/StringBuilder.h>
#include <AK/Utf8View.h>
#include <LibCore/Timer.h>
#include <LibGUI/TextDocument.h>
#include <LibRegex/Regex.h>
#include <LibUnicode/CharacterTypes.h>
#include <LibUnicode/Segmentation.h>
namespace GUI {
NonnullRefPtr<TextDocument> TextDocument::create(Client* client)
{
return adopt_ref(*new TextDocument(client));
}
TextDocument::TextDocument(Client* client)
{
if (client)
m_clients.set(client);
append_line(make<TextDocumentLine>(*this));
set_unmodified();
m_undo_stack.on_state_change = [this] {
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_update_undo_stack();
}
};
}
bool TextDocument::set_text(StringView text, AllowCallback allow_callback, IsNewDocument is_new_document)
{
m_client_notifications_enabled = false;
if (is_new_document == IsNewDocument::Yes)
m_undo_stack.clear();
m_spans.clear();
m_folding_regions.clear();
remove_all_lines();
ArmedScopeGuard clear_text_guard([this]() {
set_text({});
});
size_t start_of_current_line = 0;
auto add_line = [&](size_t current_position) -> bool {
size_t line_length = current_position - start_of_current_line;
auto line = make<TextDocumentLine>(*this);
bool success = true;
if (line_length)
success = line->set_text(*this, text.substring_view(start_of_current_line, current_position - start_of_current_line));
if (!success)
return false;
append_line(move(line));
start_of_current_line = current_position + 1;
return true;
};
size_t i = 0;
for (i = 0; i < text.length(); ++i) {
if (text[i] != '\n')
continue;
auto success = add_line(i);
if (!success)
return false;
}
auto success = add_line(i);
if (!success)
return false;
// Don't show the file's trailing newline as an actual new line.
if (line_count() > 1 && line(line_count() - 1).is_empty())
(void)m_lines.take_last();
m_client_notifications_enabled = true;
for (auto* client : m_clients)
client->document_did_set_text(allow_callback);
clear_text_guard.disarm();
// FIXME: Should the modified state be cleared on some of the earlier returns as well?
if (is_new_document == IsNewDocument::Yes)
set_unmodified();
return true;
}
void TextDocument::append_line(NonnullOwnPtr<TextDocumentLine> line)
{
lines().append(move(line));
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_append_line();
}
}
void TextDocument::insert_line(size_t line_index, NonnullOwnPtr<TextDocumentLine> line)
{
lines().insert(line_index, move(line));
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_insert_line(line_index);
}
}
NonnullOwnPtr<TextDocumentLine> TextDocument::take_line(size_t line_index)
{
auto line = lines().take(line_index);
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_remove_line(line_index);
}
return line;
}
void TextDocument::remove_line(size_t line_index)
{
lines().remove(line_index);
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_remove_line(line_index);
}
}
void TextDocument::remove_all_lines()
{
lines().clear();
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_remove_all_lines();
}
}
void TextDocument::register_client(Client& client)
{
m_clients.set(&client);
}
void TextDocument::unregister_client(Client& client)
{
m_clients.remove(&client);
}
void TextDocument::update_views(Badge<TextDocumentLine>)
{
notify_did_change();
}
void TextDocument::notify_did_change()
{
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_change();
}
m_regex_needs_update = true;
}
void TextDocument::set_all_cursors(TextPosition const& position)
{
if (m_client_notifications_enabled) {
for (auto* client : m_clients)
client->document_did_set_cursor(position);
}
}
ByteString TextDocument::text() const
{
StringBuilder builder;
for (size_t i = 0; i < line_count(); ++i) {
auto& line = this->line(i);
builder.append(line.view());
if (i != line_count() - 1)
builder.append('\n');
}
return builder.to_byte_string();
}
ByteString TextDocument::text_in_range(TextRange const& a_range) const
{
auto range = a_range.normalized();
if (is_empty() || line_count() < range.end().line() - range.start().line())
return ByteString("");
StringBuilder builder;
for (size_t i = range.start().line(); i <= range.end().line(); ++i) {
auto& line = this->line(i);
size_t selection_start_column_on_line = range.start().line() == i ? range.start().column() : 0;
size_t selection_end_column_on_line = range.end().line() == i ? range.end().column() : line.length();
if (!line.is_empty()) {
builder.append(
Utf32View(
line.code_points() + selection_start_column_on_line,
selection_end_column_on_line - selection_start_column_on_line));
}
if (i != range.end().line())
builder.append('\n');
}
return builder.to_byte_string();
}
// This function will return the position of the previous grapheme cluster
// break, relative to the cursor, for "correct looking" parsing of unicode based
// on grapheme cluster boundary algorithm.
size_t TextDocument::get_previous_grapheme_cluster_boundary(TextPosition const& cursor) const
{
if (!cursor.is_valid())
return 0;
auto const& line = this->line(cursor.line());
auto index = Unicode::previous_grapheme_segmentation_boundary(line.view(), cursor.column());
return index.value_or(cursor.column() - 1);
}
// This function will return the position of the next grapheme cluster break,
// relative to the cursor, for "correct looking" parsing of unicode based on
// grapheme cluster boundary algorithm.
size_t TextDocument::get_next_grapheme_cluster_boundary(TextPosition const& cursor) const
{
if (!cursor.is_valid())
return 0;
auto const& line = this->line(cursor.line());
auto index = Unicode::next_grapheme_segmentation_boundary(line.view(), cursor.column());
return index.value_or(cursor.column() + 1);
}
u32 TextDocument::code_point_at(TextPosition const& position) const
{
VERIFY(position.line() < line_count());
auto& line = this->line(position.line());
if (position.column() == line.length())
return '\n';
return line.code_points()[position.column()];
}
TextPosition TextDocument::next_position_after(TextPosition const& position, SearchShouldWrap should_wrap) const
{
auto& line = this->line(position.line());
if (position.column() == line.length()) {
if (position.line() == line_count() - 1) {
if (should_wrap == SearchShouldWrap::Yes)
return { 0, 0 };
return {};
}
return { position.line() + 1, 0 };
}
return { position.line(), position.column() + 1 };
}
TextPosition TextDocument::previous_position_before(TextPosition const& position, SearchShouldWrap should_wrap) const
{
if (position.column() == 0) {
if (position.line() == 0) {
if (should_wrap == SearchShouldWrap::Yes) {
auto& last_line = this->line(line_count() - 1);
return { line_count() - 1, last_line.length() };
}
return {};
}
auto& prev_line = this->line(position.line() - 1);
return { position.line() - 1, prev_line.length() };
}
return { position.line(), position.column() - 1 };
}
void TextDocument::update_regex_matches(StringView needle)
{
if (m_regex_needs_update || needle != m_regex_needle) {
Regex<PosixExtended> re(needle);
Vector<RegexStringView> views;
for (size_t line = 0; line < m_lines.size(); ++line) {
views.append(m_lines[line]->view());
}
re.search(views, m_regex_result);
m_regex_needs_update = false;
m_regex_needle = ByteString { needle };
m_regex_result_match_index = -1;
m_regex_result_match_capture_group_index = -1;
}
}
TextRange TextDocument::find_next(StringView needle, TextPosition const& start, SearchShouldWrap should_wrap, bool regmatch, bool match_case)
{
if (needle.is_empty())
return {};
if (regmatch) {
if (!m_regex_result.matches.size())
return {};
regex::Match match;
bool use_whole_match { false };
auto next_match = [&] {
m_regex_result_match_capture_group_index = 0;
if (m_regex_result_match_index == m_regex_result.matches.size() - 1) {
if (should_wrap == SearchShouldWrap::Yes)
m_regex_result_match_index = 0;
else
++m_regex_result_match_index;
} else
++m_regex_result_match_index;
};
if (m_regex_result.n_capture_groups) {
if (m_regex_result_match_index >= m_regex_result.capture_group_matches.size())
next_match();
else {
// check if last capture group has been reached
if (m_regex_result_match_capture_group_index >= m_regex_result.capture_group_matches.at(m_regex_result_match_index).size()) {
next_match();
} else {
// get to the next capture group item
++m_regex_result_match_capture_group_index;
}
}
// use whole match, if there is no capture group for current index
if (m_regex_result_match_index >= m_regex_result.capture_group_matches.size())
use_whole_match = true;
else if (m_regex_result_match_capture_group_index >= m_regex_result.capture_group_matches.at(m_regex_result_match_index).size())
next_match();
} else {
next_match();
}
if (use_whole_match || !m_regex_result.capture_group_matches.at(m_regex_result_match_index).size())
match = m_regex_result.matches.at(m_regex_result_match_index);
else
match = m_regex_result.capture_group_matches.at(m_regex_result_match_index).at(m_regex_result_match_capture_group_index);
return TextRange { { match.line, match.column }, { match.line, match.column + match.view.length() } };
}
TextPosition position = start.is_valid() ? start : TextPosition(0, 0);
TextPosition original_position = position;
TextPosition start_of_potential_match;
size_t needle_index = 0;
Utf8View unicode_needle(needle);
Vector<u32> needle_code_points;
for (u32 code_point : unicode_needle)
needle_code_points.append(code_point);
do {
auto ch = code_point_at(position);
bool code_point_matches = false;
if (needle_index >= needle_code_points.size())
code_point_matches = false;
else if (match_case)
code_point_matches = ch == needle_code_points[needle_index];
else
code_point_matches = Unicode::to_unicode_lowercase(ch) == Unicode::to_unicode_lowercase(needle_code_points[needle_index]);
if (code_point_matches) {
if (needle_index == 0)
start_of_potential_match = position;
++needle_index;
if (needle_index >= needle_code_points.size())
return { start_of_potential_match, next_position_after(position, should_wrap) };
} else {
if (needle_index > 0)
position = start_of_potential_match;
needle_index = 0;
}
position = next_position_after(position, should_wrap);
} while (position.is_valid() && position != original_position);
return {};
}
TextRange TextDocument::find_previous(StringView needle, TextPosition const& start, SearchShouldWrap should_wrap, bool regmatch, bool match_case)
{
if (needle.is_empty())
return {};
if (regmatch) {
if (!m_regex_result.matches.size())
return {};
regex::Match match;
bool use_whole_match { false };
auto next_match = [&] {
if (m_regex_result_match_index == 0) {
if (should_wrap == SearchShouldWrap::Yes)
m_regex_result_match_index = m_regex_result.matches.size() - 1;
else
--m_regex_result_match_index;
} else
--m_regex_result_match_index;
m_regex_result_match_capture_group_index = m_regex_result.capture_group_matches.at(m_regex_result_match_index).size() - 1;
};
if (m_regex_result.n_capture_groups) {
if (m_regex_result_match_index >= m_regex_result.capture_group_matches.size())
next_match();
else {
// check if last capture group has been reached
if (m_regex_result_match_capture_group_index >= m_regex_result.capture_group_matches.at(m_regex_result_match_index).size()) {
next_match();
} else {
// get to the next capture group item
--m_regex_result_match_capture_group_index;
}
}
// use whole match, if there is no capture group for current index
if (m_regex_result_match_index >= m_regex_result.capture_group_matches.size())
use_whole_match = true;
else if (m_regex_result_match_capture_group_index >= m_regex_result.capture_group_matches.at(m_regex_result_match_index).size())
next_match();
} else {
next_match();
}
if (use_whole_match || !m_regex_result.capture_group_matches.at(m_regex_result_match_index).size())
match = m_regex_result.matches.at(m_regex_result_match_index);
else
match = m_regex_result.capture_group_matches.at(m_regex_result_match_index).at(m_regex_result_match_capture_group_index);
return TextRange { { match.line, match.column }, { match.line, match.column + match.view.length() } };
}
TextPosition position = start.is_valid() ? start : TextPosition(0, 0);
position = previous_position_before(position, should_wrap);
if (position.line() >= line_count())
return {};
TextPosition original_position = position;
Utf8View unicode_needle(needle);
Vector<u32> needle_code_points;
for (u32 code_point : unicode_needle)
needle_code_points.append(code_point);
TextPosition end_of_potential_match;
size_t needle_index = needle_code_points.size() - 1;
do {
auto ch = code_point_at(position);
bool code_point_matches = false;
if (needle_index >= needle_code_points.size())
code_point_matches = false;
else if (match_case)
code_point_matches = ch == needle_code_points[needle_index];
else
code_point_matches = Unicode::to_unicode_lowercase(ch) == Unicode::to_unicode_lowercase(needle_code_points[needle_index]);
if (code_point_matches) {
if (needle_index == needle_code_points.size() - 1)
end_of_potential_match = position;
if (needle_index == 0)
return { position, next_position_after(end_of_potential_match, should_wrap) };
--needle_index;
} else {
if (needle_index < needle_code_points.size() - 1)
position = end_of_potential_match;
needle_index = needle_code_points.size() - 1;
}
position = previous_position_before(position, should_wrap);
} while (position.is_valid() && position != original_position);
return {};
}
Vector<TextRange> TextDocument::find_all(StringView needle, bool regmatch, bool match_case)
{
Vector<TextRange> ranges;
TextPosition position;
for (;;) {
auto range = find_next(needle, position, SearchShouldWrap::No, regmatch, match_case);
if (!range.is_valid())
break;
ranges.append(range);
position = range.end();
}
return ranges;
}
Optional<TextDocumentSpan> TextDocument::first_non_skippable_span_before(TextPosition const& position) const
{
for (int i = m_spans.size() - 1; i >= 0; --i) {
if (!m_spans[i].range.contains(position))
continue;
while ((i - 1) >= 0 && m_spans[i - 1].is_skippable)
--i;
if (i <= 0)
return {};
return m_spans[i - 1];
}
return {};
}
Optional<TextDocumentSpan> TextDocument::first_non_skippable_span_after(TextPosition const& position) const
{
size_t i = 0;
// Find the first span containing the cursor
for (; i < m_spans.size(); ++i) {
if (m_spans[i].range.contains(position))
break;
}
// Find the first span *after* the cursor
// TODO: For a large number of spans, binary search would be faster.
for (; i < m_spans.size(); ++i) {
if (!m_spans[i].range.contains(position))
break;
}
// Skip skippable spans
for (; i < m_spans.size(); ++i) {
if (!m_spans[i].is_skippable)
break;
}
if (i < m_spans.size())
return m_spans[i];
return {};
}
static bool should_continue_beyond_word(Utf32View const& view)
{
static auto punctuation = Unicode::general_category_from_string("Punctuation"sv);
static auto separator = Unicode::general_category_from_string("Separator"sv);
if (!punctuation.has_value() || !separator.has_value())
return false;
auto has_any_gc = [&](auto code_point, auto&&... categories) {
return (Unicode::code_point_has_general_category(code_point, *categories) || ...);
};
for (auto code_point : view) {
if (!has_any_gc(code_point, punctuation, separator))
return false;
}
return true;
}
TextPosition TextDocument::first_word_break_before(TextPosition const& position, bool start_at_column_before) const
{
if (position.column() == 0) {
if (position.line() == 0) {
return TextPosition(0, 0);
}
auto previous_line = this->line(position.line() - 1);
return TextPosition(position.line() - 1, previous_line.length());
}
auto target = position;
auto const& line = this->line(target.line());
auto modifier = start_at_column_before ? 1 : 0;
if (target.column() == line.length())
modifier = 1;
target.set_column(target.column() - modifier);
while (target.column() > 0) {
if (auto index = Unicode::previous_word_segmentation_boundary(line.view(), target.column()); index.has_value()) {
auto view_between_target_and_index = line.view().substring_view(*index, target.column() - *index);
if (should_continue_beyond_word(view_between_target_and_index)) {
target.set_column(*index == 0 ? 0 : *index - 1);
continue;
}
target.set_column(*index);
break;
}
}
return target;
}
TextPosition TextDocument::first_word_break_after(TextPosition const& position) const
{
auto target = position;
auto const& line = this->line(target.line());
if (position.column() >= line.length()) {
if (position.line() >= this->line_count() - 1) {
return position;
}
return TextPosition(position.line() + 1, 0);
}
while (target.column() < line.length()) {
if (auto index = Unicode::next_word_segmentation_boundary(line.view(), target.column()); index.has_value()) {
auto view_between_target_and_index = line.view().substring_view(target.column(), *index - target.column());
if (should_continue_beyond_word(view_between_target_and_index)) {
target.set_column(min(*index + 1, line.length()));
continue;
}
target.set_column(*index);
break;
}
}
return target;
}
TextPosition TextDocument::first_word_before(TextPosition const& position, bool start_at_column_before) const
{
if (position.column() == 0) {
if (position.line() == 0) {
return TextPosition(0, 0);
}
auto previous_line = this->line(position.line() - 1);
return TextPosition(position.line() - 1, previous_line.length());
}
auto target = position;
auto line = this->line(target.line());
if (target.column() == line.length())
start_at_column_before = 1;
auto nonblank_passed = !is_ascii_blank(line.code_points()[target.column() - start_at_column_before]);
while (target.column() > 0) {
auto prev_code_point = line.code_points()[target.column() - 1];
nonblank_passed |= !is_ascii_blank(prev_code_point);
if (nonblank_passed && is_ascii_blank(prev_code_point)) {
break;
} else if (is_ascii_punctuation(prev_code_point)) {
target.set_column(target.column() - 1);
break;
}
target.set_column(target.column() - 1);
}
return target;
}
void TextDocument::undo()
{
if (!can_undo())
return;
m_undo_stack.undo();
notify_did_change();
}
void TextDocument::redo()
{
if (!can_redo())
return;
m_undo_stack.redo();
notify_did_change();
}
void TextDocument::add_to_undo_stack(NonnullOwnPtr<TextDocumentUndoCommand> undo_command)
{
m_undo_stack.push(move(undo_command));
}
TextDocumentUndoCommand::TextDocumentUndoCommand(TextDocument& document)
: m_document(document)
{
}
InsertTextCommand::InsertTextCommand(TextDocument& document, ByteString const& text, TextPosition const& position)
: TextDocumentUndoCommand(document)
, m_text(text)
, m_range({ position, position })
{
}
ByteString InsertTextCommand::action_text() const
{
return "Insert Text";
}
bool InsertTextCommand::merge_with(GUI::Command const& other)
{
if (!is<InsertTextCommand>(other) || commit_time_expired())
return false;
auto const& typed_other = static_cast<InsertTextCommand const&>(other);
if (typed_other.m_text.is_whitespace() && !m_text.is_whitespace())
return false; // Skip if other is whitespace while this is not
if (m_range.end() != typed_other.m_range.start())
return false;
if (m_range.start().line() != m_range.end().line())
return false;
StringBuilder builder(m_text.length() + typed_other.m_text.length());
builder.append(m_text);
builder.append(typed_other.m_text);
m_text = builder.to_byte_string();
m_range.set_end(typed_other.m_range.end());
m_timestamp = MonotonicTime::now();
return true;
}
void InsertTextCommand::perform_formatting(TextDocument::Client const& client)
{
size_t const tab_width = client.soft_tab_width();
auto const& dest_line = m_document.line(m_range.start().line());
bool const should_auto_indent = client.is_automatic_indentation_enabled();
StringBuilder builder;
size_t column = m_range.start().column();
size_t line_indentation = dest_line.leading_spaces();
bool at_start_of_line = line_indentation == column;
for (auto input_char : m_text) {
if (input_char == '\n') {
size_t spaces_at_end = 0;
if (column < line_indentation)
spaces_at_end = line_indentation - column;
line_indentation -= spaces_at_end;
builder.append('\n');
column = 0;
if (should_auto_indent) {
for (; column < line_indentation; ++column) {
builder.append(' ');
}
}
at_start_of_line = true;
} else if (input_char == '\t') {
size_t next_soft_tab_stop = ((column + tab_width) / tab_width) * tab_width;
size_t spaces_to_insert = next_soft_tab_stop - column;
for (size_t i = 0; i < spaces_to_insert; ++i) {
builder.append(' ');
}
column = next_soft_tab_stop;
if (at_start_of_line) {
line_indentation = column;
}
} else {
if (input_char == ' ') {
if (at_start_of_line) {
++line_indentation;
}
} else {
at_start_of_line = false;
}
builder.append(input_char);
++column;
}
}
m_text = builder.to_byte_string();
}
void InsertTextCommand::redo()
{
auto new_cursor = m_document.insert_at(m_range.start(), m_text, m_client);
// NOTE: We don't know where the range ends until after doing redo().
// This is okay since we always do redo() after adding this to the undo stack.
m_range.set_end(new_cursor);
m_document.set_all_cursors(new_cursor);
}
void InsertTextCommand::undo()
{
m_document.remove(m_range);
m_document.set_all_cursors(m_range.start());
}
RemoveTextCommand::RemoveTextCommand(TextDocument& document, ByteString const& text, TextRange const& range, TextPosition const& original_cursor_position)
: TextDocumentUndoCommand(document)
, m_text(text)
, m_range(range)
, m_original_cursor_position(original_cursor_position)
{
}
ByteString RemoveTextCommand::action_text() const
{
return "Remove Text";
}
bool RemoveTextCommand::merge_with(GUI::Command const& other)
{
if (!is<RemoveTextCommand>(other) || commit_time_expired())
return false;
auto const& typed_other = static_cast<RemoveTextCommand const&>(other);
if (m_range.start() != typed_other.m_range.end())
return false;
if (m_range.start().line() != m_range.end().line())
return false;
// Merge backspaces
StringBuilder builder(m_text.length() + typed_other.m_text.length());
builder.append(typed_other.m_text);
builder.append(m_text);
m_text = builder.to_byte_string();
m_range.set_start(typed_other.m_range.start());
m_timestamp = MonotonicTime::now();
return true;
}
void RemoveTextCommand::redo()
{
m_document.remove(m_range);
m_document.set_all_cursors(m_range.start());
}
void RemoveTextCommand::undo()
{
m_document.insert_at(m_range.start(), m_text);
m_document.set_all_cursors(m_original_cursor_position);
}
InsertLineCommand::InsertLineCommand(TextDocument& document, TextPosition cursor, ByteString&& text, InsertPosition pos)
: TextDocumentUndoCommand(document)
, m_cursor(cursor)
, m_text(move(text))
, m_pos(pos)
{
}
void InsertLineCommand::redo()
{
size_t line_number = compute_line_number();
m_document.insert_line(line_number, make<TextDocumentLine>(m_document, m_text));
m_document.set_all_cursors(TextPosition { line_number, m_document.line(line_number).length() });
}
void InsertLineCommand::undo()
{
size_t line_number = compute_line_number();
m_document.remove_line(line_number);
m_document.set_all_cursors(m_cursor);
}
size_t InsertLineCommand::compute_line_number() const
{
if (m_pos == InsertPosition::Above)
return m_cursor.line();
if (m_pos == InsertPosition::Below)
return m_cursor.line() + 1;
VERIFY_NOT_REACHED();
}
ByteString InsertLineCommand::action_text() const
{
StringBuilder action_text_builder;
action_text_builder.append("Insert Line"sv);
if (m_pos == InsertPosition::Above) {
action_text_builder.append(" (Above)"sv);
} else if (m_pos == InsertPosition::Below) {
action_text_builder.append(" (Below)"sv);
} else {
VERIFY_NOT_REACHED();
}
return action_text_builder.to_byte_string();
}
ReplaceAllTextCommand::ReplaceAllTextCommand(GUI::TextDocument& document, ByteString const& text, ByteString const& action_text)
: TextDocumentUndoCommand(document)
, m_original_text(document.text())
, m_new_text(text)
, m_action_text(action_text)
{
}
void ReplaceAllTextCommand::redo()
{
m_document.set_all_cursors({ 0, 0 });
m_document.set_text(m_new_text, AllowCallback::Yes, TextDocument::IsNewDocument::No);
}
void ReplaceAllTextCommand::undo()
{
m_document.set_all_cursors({ 0, 0 });
m_document.set_text(m_original_text, AllowCallback::Yes, TextDocument::IsNewDocument::No);
}
bool ReplaceAllTextCommand::merge_with(GUI::Command const&)
{
return false;
}
ByteString ReplaceAllTextCommand::action_text() const
{
return m_action_text;
}
IndentSelection::IndentSelection(TextDocument& document, size_t tab_width, TextRange const& range)
: TextDocumentUndoCommand(document)
, m_tab_width(tab_width)
, m_range(range)
{
}
void IndentSelection::redo()
{
auto const tab = ByteString::repeated(' ', m_tab_width);
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
m_document.insert_at({ i, 0 }, tab, m_client);
}
m_document.set_all_cursors(m_range.start());
}
void IndentSelection::undo()
{
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
m_document.remove({ { i, 0 }, { i, m_tab_width } });
}
m_document.set_all_cursors(m_range.start());
}
UnindentSelection::UnindentSelection(TextDocument& document, size_t tab_width, TextRange const& range)
: TextDocumentUndoCommand(document)
, m_tab_width(tab_width)
, m_range(range)
{
}
void UnindentSelection::redo()
{
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
if (m_document.line(i).leading_spaces() >= m_tab_width)
m_document.remove({ { i, 0 }, { i, m_tab_width } });
else
m_document.remove({ { i, 0 }, { i, m_document.line(i).leading_spaces() } });
}
m_document.set_all_cursors(m_range.start());
}
void UnindentSelection::undo()
{
auto const tab = ByteString::repeated(' ', m_tab_width);
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++)
m_document.insert_at({ i, 0 }, tab, m_client);
m_document.set_all_cursors(m_range.start());
}
CommentSelection::CommentSelection(TextDocument& document, StringView prefix, StringView suffix, TextRange const& range)
: TextDocumentUndoCommand(document)
, m_prefix(prefix)
, m_suffix(suffix)
, m_range(range)
{
}
void CommentSelection::undo()
{
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
if (m_document.line(i).is_empty())
continue;
auto line = m_document.line(i).to_utf8();
auto prefix_start = line.find(m_prefix).value_or(0);
m_document.line(i).keep_range(
m_document,
prefix_start + m_prefix.length(),
m_document.line(i).last_non_whitespace_column().value_or(line.length()) - prefix_start - m_prefix.length() - m_suffix.length());
}
m_document.set_all_cursors(m_range.start());
}
void CommentSelection::redo()
{
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
if (m_document.line(i).is_empty())
continue;
m_document.insert_at({ i, 0 }, m_prefix, m_client);
for (auto const& b : m_suffix.bytes()) {
m_document.line(i).append(m_document, b);
}
}
m_document.set_all_cursors(m_range.start());
}
UncommentSelection::UncommentSelection(TextDocument& document, StringView prefix, StringView suffix, TextRange const& range)
: TextDocumentUndoCommand(document)
, m_prefix(prefix)
, m_suffix(suffix)
, m_range(range)
{
}
void UncommentSelection::undo()
{
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
if (m_document.line(i).is_empty())
continue;
m_document.insert_at({ i, 0 }, m_prefix, m_client);
for (auto const& b : m_suffix.bytes()) {
m_document.line(i).append(m_document, b);
}
}
m_document.set_all_cursors(m_range.start());
}
void UncommentSelection::redo()
{
for (size_t i = m_range.start().line(); i <= m_range.end().line(); i++) {
if (m_document.line(i).is_empty())
continue;
auto line = m_document.line(i).to_utf8();
auto prefix_start = line.find(m_prefix).value_or(0);
m_document.line(i).keep_range(
m_document,
prefix_start + m_prefix.length(),
m_document.line(i).last_non_whitespace_column().value_or(line.length()) - prefix_start - m_prefix.length() - m_suffix.length());
}
m_document.set_all_cursors(m_range.start());
}
TextPosition TextDocument::insert_at(TextPosition const& position, StringView text, Client const* client)
{
TextPosition cursor = position;
Utf8View utf8_view(text);
for (auto code_point : utf8_view)
cursor = insert_at(cursor, code_point, client);
return cursor;
}
TextPosition TextDocument::insert_at(TextPosition const& position, u32 code_point, Client const*)
{
if (code_point == '\n') {
auto new_line = make<TextDocumentLine>(*this);
new_line->append(*this, line(position.line()).code_points() + position.column(), line(position.line()).length() - position.column());
line(position.line()).truncate(*this, position.column());
insert_line(position.line() + 1, move(new_line));
notify_did_change();
return { position.line() + 1, 0 };
} else {
line(position.line()).insert(*this, position.column(), code_point);
notify_did_change();
return { position.line(), position.column() + 1 };
}
}
void TextDocument::remove(TextRange const& unnormalized_range)
{
if (!unnormalized_range.is_valid())
return;
auto range = unnormalized_range.normalized();
// First delete all the lines in between the first and last one.
for (size_t i = range.start().line() + 1; i < range.end().line();) {
remove_line(i);
range.end().set_line(range.end().line() - 1);
}
if (range.start().line() == range.end().line()) {
// Delete within same line.
auto& line = this->line(range.start().line());
if (line.length() == 0)
return;
bool whole_line_is_selected = range.start().column() == 0 && range.end().column() == line.length();
if (whole_line_is_selected) {
line.clear(*this);
} else {
line.remove_range(*this, range.start().column(), range.end().column() - range.start().column());
}
} else {
// Delete across a newline, merging lines.
VERIFY(range.start().line() == range.end().line() - 1);
auto& first_line = line(range.start().line());
auto& second_line = line(range.end().line());
Vector<u32> code_points;
code_points.append(first_line.code_points(), range.start().column());
if (!second_line.is_empty())
code_points.append(second_line.code_points() + range.end().column(), second_line.length() - range.end().column());
first_line.set_text(*this, move(code_points));
remove_line(range.end().line());
}
if (lines().is_empty()) {
append_line(make<TextDocumentLine>(*this));
}
notify_did_change();
}
bool TextDocument::is_empty() const
{
return line_count() == 1 && line(0).is_empty();
}
TextRange TextDocument::range_for_entire_line(size_t line_index) const
{
if (line_index >= line_count())
return {};
return { { line_index, 0 }, { line_index, line(line_index).length() } };
}
void TextDocument::set_unmodified()
{
m_undo_stack.set_current_unmodified();
}
}
