mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-11-04 15:20:58 +00:00
5e1499d104
This commit un-deprecates DeprecatedString, and repurposes it as a byte
string.
As the null state has already been removed, there are no other
particularly hairy blockers in repurposing this type as a byte string
(what it _really_ is).
This commit is auto-generated:
$ xs=$(ack -l \bDeprecatedString\b\|deprecated_string AK Userland \
Meta Ports Ladybird Tests Kernel)
$ perl -pie 's/\bDeprecatedString\b/ByteString/g;
s/deprecated_string/byte_string/g' $xs
$ clang-format --style=file -i \
$(git diff --name-only | grep \.cpp\|\.h)
$ gn format $(git ls-files '*.gn' '*.gni')
502 lines
17 KiB
C++
502 lines
17 KiB
C++
/*
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* Copyright (c) 2021-2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/CharacterTypes.h>
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#include <LibGUI/EditingEngine.h>
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#include <LibGUI/Event.h>
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#include <LibGUI/TextEditor.h>
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namespace GUI {
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void EditingEngine::attach(TextEditor& editor)
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{
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VERIFY(!m_editor);
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m_editor = editor;
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}
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void EditingEngine::detach()
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{
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VERIFY(m_editor);
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m_editor = nullptr;
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}
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bool EditingEngine::on_key(KeyEvent const& event)
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{
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if (event.key() == KeyCode::Key_Left) {
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if (!event.shift() && m_editor->selection().is_valid()) {
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m_editor->set_cursor(m_editor->selection().normalized().start());
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m_editor->selection().clear();
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m_editor->did_update_selection();
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if (!event.ctrl()) {
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m_editor->update();
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return true;
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}
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}
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if (event.ctrl()) {
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m_editor->update_selection(event.shift());
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move_to_previous_span();
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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m_editor->update_selection(event.shift());
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move_one_left();
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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if (event.key() == KeyCode::Key_Right) {
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if (!event.shift() && m_editor->selection().is_valid()) {
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m_editor->set_cursor(m_editor->selection().normalized().end());
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m_editor->selection().clear();
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m_editor->did_update_selection();
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if (!event.ctrl()) {
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m_editor->update();
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return true;
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}
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}
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if (event.ctrl()) {
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m_editor->update_selection(event.shift());
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move_to_next_span();
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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m_editor->update_selection(event.shift());
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move_one_right();
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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if (event.key() == KeyCode::Key_Up || event.key() == KeyCode::Key_Down) {
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auto const direction = key_code_to_vertical_direction(event.key());
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bool const condition_for_up = direction == VerticalDirection::Up && m_editor->cursor().line() > 0;
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bool const condition_for_down = direction == VerticalDirection::Down && m_editor->cursor().line() < (m_editor->line_count() - 1);
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bool const condition_for_up_to_beginning = direction == VerticalDirection::Up && m_editor->cursor().line() == 0;
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bool const condition_for_down_to_end = direction == VerticalDirection::Down && m_editor->cursor().line() == (m_editor->line_count() - 1);
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if (condition_for_up || condition_for_down || m_editor->is_wrapping_enabled())
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m_editor->update_selection(event.shift());
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// Shift + Up on the top line (or only line) selects from the cursor to the start of the line.
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if (condition_for_up_to_beginning) {
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m_editor->update_selection(event.shift());
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move_to_line_beginning();
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}
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// Shift + Down on the bottom line (or only line) selects from the cursor to the end of the line.
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if (condition_for_down_to_end) {
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m_editor->update_selection(event.shift());
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move_to_line_end();
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}
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move_one_helper(event, direction);
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return true;
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}
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if (event.key() == KeyCode::Key_Home) {
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m_editor->update_selection(event.shift());
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if (event.ctrl()) {
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move_to_first_line();
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} else {
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move_to_line_beginning();
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}
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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if (event.key() == KeyCode::Key_End) {
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m_editor->update_selection(event.shift());
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if (event.ctrl()) {
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move_to_last_line();
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} else {
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move_to_line_end();
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}
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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if (event.key() == KeyCode::Key_PageUp) {
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if (m_editor->cursor().line() > 0 || m_editor->is_wrapping_enabled()) {
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m_editor->update_selection(event.shift());
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}
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move_page_up();
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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if (event.key() == KeyCode::Key_PageDown) {
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if (m_editor->cursor().line() < (m_editor->line_count() - 1) || m_editor->is_wrapping_enabled()) {
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m_editor->update_selection(event.shift());
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}
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move_page_down();
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if (event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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return true;
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}
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return false;
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}
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void EditingEngine::move_one_left()
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{
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if (m_editor->cursor().column() > 0) {
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auto new_column = m_editor->document().get_previous_grapheme_cluster_boundary(m_editor->cursor());
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m_editor->set_cursor(m_editor->cursor().line(), new_column);
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} else if (m_editor->cursor().line() > 0) {
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auto new_line = m_editor->cursor().line() - 1;
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auto new_column = m_editor->lines()[new_line]->length();
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m_editor->set_cursor(new_line, new_column);
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}
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}
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void EditingEngine::move_one_right()
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{
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auto new_line = m_editor->cursor().line();
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auto new_column = m_editor->cursor().column();
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if (m_editor->cursor().column() < m_editor->current_line().length()) {
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new_line = m_editor->cursor().line();
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new_column = m_editor->document().get_next_grapheme_cluster_boundary(m_editor->cursor());
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} else if (m_editor->cursor().line() != m_editor->line_count() - 1) {
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new_line = m_editor->cursor().line() + 1;
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new_column = 0;
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}
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m_editor->set_cursor(new_line, new_column);
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}
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void EditingEngine::move_to_previous_span()
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{
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TextPosition new_cursor;
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if (m_editor->document().has_spans()) {
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auto span = m_editor->document().first_non_skippable_span_before(m_editor->cursor());
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if (span.has_value()) {
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new_cursor = span.value().range.start();
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} else {
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// No remaining spans, just use word break calculation
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new_cursor = m_editor->document().first_word_break_before(m_editor->cursor(), true);
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}
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} else {
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new_cursor = m_editor->document().first_word_break_before(m_editor->cursor(), true);
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}
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m_editor->set_cursor(new_cursor);
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}
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void EditingEngine::move_to_next_span()
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{
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TextPosition new_cursor;
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if (m_editor->document().has_spans()) {
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auto span = m_editor->document().first_non_skippable_span_after(m_editor->cursor());
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if (span.has_value()) {
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new_cursor = span.value().range.start();
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} else {
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// No remaining spans, just use word break calculation
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new_cursor = m_editor->document().first_word_break_after(m_editor->cursor());
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}
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} else {
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new_cursor = m_editor->document().first_word_break_after(m_editor->cursor());
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}
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m_editor->set_cursor(new_cursor);
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}
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void EditingEngine::move_to_logical_line_beginning()
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{
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TextPosition new_cursor;
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size_t first_nonspace_column = m_editor->current_line().first_non_whitespace_column();
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if (m_editor->cursor().column() == first_nonspace_column) {
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new_cursor = { m_editor->cursor().line(), 0 };
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} else {
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new_cursor = { m_editor->cursor().line(), first_nonspace_column };
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}
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m_editor->set_cursor(new_cursor);
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}
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void EditingEngine::move_to_line_beginning()
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{
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if (m_editor->is_wrapping_enabled()) {
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TextPosition new_cursor;
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auto home_position = m_editor->cursor_content_rect().location().translated(-m_editor->width(), 0);
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auto start_of_visual_line = m_editor->text_position_at_content_position(home_position);
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auto first_non_space_column = m_editor->current_line().first_non_whitespace_column();
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// Subsequent "move_to_line_beginning()" calls move us in the following way:
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// 1. To the start of the current visual line
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// 2. To the first non-whitespace character on the logical line
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// 3. To the first character on the logical line
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// ...and then repeat 2 and 3.
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if (m_editor->cursor() == start_of_visual_line) {
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// Already at 1 so go to 2
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new_cursor = { m_editor->cursor().line(), first_non_space_column };
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} else if (m_editor->cursor().column() == first_non_space_column) {
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// At 2 so go to 3
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new_cursor = { m_editor->cursor().line(), 0 };
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} else {
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// Anything else, so go to 1
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new_cursor = start_of_visual_line;
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}
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m_editor->set_cursor(new_cursor);
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} else {
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move_to_logical_line_beginning();
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}
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}
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void EditingEngine::move_to_line_end()
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{
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if (m_editor->is_wrapping_enabled())
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m_editor->set_cursor_to_end_of_visual_line();
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else
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move_to_logical_line_end();
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}
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void EditingEngine::move_to_logical_line_end()
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{
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m_editor->set_cursor({ m_editor->cursor().line(), m_editor->current_line().length() });
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}
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void EditingEngine::move_one_helper(KeyEvent const& event, VerticalDirection direction)
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{
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auto const result = direction == VerticalDirection::Up ? move_one_up(event) : move_one_down(event);
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if (result != DidMoveALine::Yes && event.shift() && m_editor->selection().start().is_valid()) {
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m_editor->selection().set_end(m_editor->cursor());
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m_editor->did_update_selection();
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}
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}
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EditingEngine::DidMoveALine EditingEngine::move_one_up(KeyEvent const& event)
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{
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if (m_editor->cursor().line() > 0 || m_editor->is_wrapping_enabled()) {
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if (event.ctrl() && event.shift()) {
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if (MoveLineUpOrDownCommand::valid_operation(*this, VerticalDirection::Up)) {
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m_editor->execute<MoveLineUpOrDownCommand>(Badge<EditingEngine> {}, event, *this);
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return DidMoveALine::Yes;
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}
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return DidMoveALine::No;
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}
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auto position_above = m_editor->cursor_content_rect().location().translated(0, -m_editor->line_height());
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TextPosition new_cursor = m_editor->text_position_at_content_position(position_above);
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m_editor->set_cursor(new_cursor);
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}
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return DidMoveALine::No;
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}
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EditingEngine::DidMoveALine EditingEngine::move_one_down(KeyEvent const& event)
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{
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if (m_editor->cursor().line() < (m_editor->line_count() - 1) || m_editor->is_wrapping_enabled()) {
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if (event.ctrl() && event.shift()) {
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if (MoveLineUpOrDownCommand::valid_operation(*this, VerticalDirection::Down)) {
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m_editor->execute<MoveLineUpOrDownCommand>(Badge<EditingEngine> {}, event, *this);
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return DidMoveALine::Yes;
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}
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return DidMoveALine::No;
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}
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auto position_below = m_editor->cursor_content_rect().location().translated(0, m_editor->line_height());
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TextPosition new_cursor = m_editor->text_position_at_content_position(position_below);
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m_editor->set_cursor(new_cursor);
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}
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return DidMoveALine::No;
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}
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void EditingEngine::move_up(double page_height_factor)
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{
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if (m_editor->cursor().line() > 0 || m_editor->is_wrapping_enabled()) {
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int pixels = (int)(m_editor->visible_content_rect().height() * page_height_factor);
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auto position_above = m_editor->cursor_content_rect().location().translated(0, -pixels);
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TextPosition new_cursor = m_editor->text_position_at_content_position(position_above);
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m_editor->set_cursor(new_cursor);
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}
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}
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void EditingEngine::move_down(double page_height_factor)
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{
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if (m_editor->cursor().line() < (m_editor->line_count() - 1) || m_editor->is_wrapping_enabled()) {
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int pixels = (int)(m_editor->visible_content_rect().height() * page_height_factor);
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auto position_below = m_editor->cursor_content_rect().location().translated(0, pixels);
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TextPosition new_cursor = m_editor->text_position_at_content_position(position_below);
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m_editor->set_cursor(new_cursor);
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};
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}
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void EditingEngine::move_page_up()
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{
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move_up(1);
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}
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void EditingEngine::move_page_down()
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{
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move_down(1);
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}
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void EditingEngine::move_to_first_line()
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{
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m_editor->set_cursor(0, 0);
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}
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void EditingEngine::move_to_last_line()
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{
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m_editor->set_cursor(m_editor->line_count() - 1, m_editor->lines()[m_editor->line_count() - 1]->length());
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}
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void EditingEngine::get_selection_line_boundaries(Badge<MoveLineUpOrDownCommand>, size_t& first_line, size_t& last_line)
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{
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get_selection_line_boundaries(first_line, last_line);
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}
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void EditingEngine::get_selection_line_boundaries(size_t& first_line, size_t& last_line)
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{
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auto selection = m_editor->normalized_selection();
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if (!selection.is_valid()) {
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first_line = m_editor->cursor().line();
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last_line = m_editor->cursor().line();
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return;
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}
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first_line = selection.start().line();
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last_line = selection.end().line();
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if (first_line != last_line && selection.end().column() == 0)
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last_line -= 1;
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}
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void EditingEngine::delete_char()
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{
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if (!m_editor->is_editable())
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return;
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m_editor->do_delete();
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}
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void EditingEngine::delete_line()
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{
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if (!m_editor->is_editable())
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return;
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m_editor->delete_current_line();
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}
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MoveLineUpOrDownCommand::MoveLineUpOrDownCommand(TextDocument& document, KeyEvent event, EditingEngine& engine)
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: TextDocumentUndoCommand(document)
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, m_event(move(event))
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, m_direction(key_code_to_vertical_direction(m_event.key()))
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, m_engine(engine)
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, m_selection(m_engine.editor().selection())
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, m_cursor(m_engine.editor().cursor())
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{
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}
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void MoveLineUpOrDownCommand::redo()
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{
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move_lines(m_direction);
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}
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void MoveLineUpOrDownCommand::undo()
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{
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move_lines(!m_direction);
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}
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bool MoveLineUpOrDownCommand::merge_with(GUI::Command const&)
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{
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return false;
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}
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ByteString MoveLineUpOrDownCommand::action_text() const
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{
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return "Move a line";
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}
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bool MoveLineUpOrDownCommand::valid_operation(EditingEngine& engine, VerticalDirection direction)
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{
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VERIFY(engine.editor().line_count() != 0);
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auto const& selection = engine.editor().selection().normalized();
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if (selection.is_valid()) {
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if ((direction == VerticalDirection::Up && selection.start().line() == 0) || (direction == VerticalDirection::Down && selection.end().line() >= engine.editor().line_count() - 1))
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return false;
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} else {
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size_t first_line;
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size_t last_line;
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engine.get_selection_line_boundaries(Badge<MoveLineUpOrDownCommand> {}, first_line, last_line);
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if ((direction == VerticalDirection::Up && first_line == 0) || (direction == VerticalDirection::Down && last_line >= engine.editor().line_count() - 1))
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return false;
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}
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return true;
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}
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TextRange MoveLineUpOrDownCommand::retrieve_selection(VerticalDirection direction)
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{
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if (direction == m_direction)
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return m_selection;
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auto const offset_selection = [this](auto const offset) {
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auto tmp = m_selection;
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tmp.start().set_line(tmp.start().line() + offset);
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tmp.end().set_line(tmp.end().line() + offset);
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return tmp;
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};
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if (direction == VerticalDirection::Up)
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return offset_selection(1);
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if (direction == VerticalDirection::Down)
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return offset_selection(-1);
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VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
void MoveLineUpOrDownCommand::move_lines(VerticalDirection direction)
|
|
{
|
|
if (m_event.shift() && m_selection.is_valid()) {
|
|
m_engine.editor().set_selection(retrieve_selection(direction));
|
|
m_engine.editor().did_update_selection();
|
|
}
|
|
|
|
if (!m_engine.editor().is_editable())
|
|
return;
|
|
|
|
size_t first_line;
|
|
size_t last_line;
|
|
m_engine.get_selection_line_boundaries(Badge<MoveLineUpOrDownCommand> {}, first_line, last_line);
|
|
|
|
auto const offset = direction == VerticalDirection::Up ? -1 : 1;
|
|
auto const insertion_index = direction == VerticalDirection::Up ? last_line : first_line;
|
|
auto const moved_line_index = offset + (direction != VerticalDirection::Up ? last_line : first_line);
|
|
|
|
auto moved_line = m_document.take_line(moved_line_index);
|
|
m_document.insert_line(insertion_index, move(moved_line));
|
|
|
|
m_engine.editor().set_cursor({ m_engine.editor().cursor().line() + offset, m_engine.editor().cursor().column() });
|
|
if (m_engine.editor().has_selection()) {
|
|
m_engine.editor().selection().start().set_line(m_engine.editor().selection().start().line() + offset);
|
|
m_engine.editor().selection().end().set_line(m_engine.editor().selection().end().line() + offset);
|
|
}
|
|
|
|
m_engine.editor().did_change();
|
|
m_engine.editor().update();
|
|
}
|
|
|
|
}
|