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0c72371ad9
- GTextRange find(const StringView& needle, const GTextPosition& start) This function searches for the needle in the haystack (the full text) and returns a GTextRange for the closest match after "start". If the needle is not found, it returns an invalid GTextRange. If no "start" position is provided, the search begins at the head of the text document. :^)
1153 lines
36 KiB
C++
1153 lines
36 KiB
C++
#include <AK/StringBuilder.h>
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#include <Kernel/KeyCode.h>
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#include <LibGUI/GAction.h>
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#include <LibGUI/GClipboard.h>
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#include <LibGUI/GFontDatabase.h>
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#include <LibGUI/GMenu.h>
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#include <LibGUI/GPainter.h>
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#include <LibGUI/GScrollBar.h>
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#include <LibGUI/GTextEditor.h>
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#include <LibGUI/GWindow.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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GTextEditor::GTextEditor(Type type, GWidget* parent)
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: GScrollableWidget(parent)
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, m_type(type)
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{
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set_frame_shape(FrameShape::Container);
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set_frame_shadow(FrameShadow::Sunken);
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set_frame_thickness(2);
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set_scrollbars_enabled(is_multi_line());
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set_font(GFontDatabase::the().get_by_name("Csilla Thin"));
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// FIXME: Recompute vertical scrollbar step size on font change.
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vertical_scrollbar().set_step(line_height());
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m_lines.append(make<Line>(*this));
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m_cursor = { 0, 0 };
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create_actions();
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}
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GTextEditor::~GTextEditor()
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{
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}
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void GTextEditor::create_actions()
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{
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m_undo_action = GAction::create(
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"Undo", { Mod_Ctrl, Key_Z }, GraphicsBitmap::load_from_file("/res/icons/16x16/undo.png"), [&](const GAction&) {
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// FIXME: Undo
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},
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this);
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m_redo_action = GAction::create(
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"Redo", { Mod_Ctrl, Key_Y }, GraphicsBitmap::load_from_file("/res/icons/16x16/redo.png"), [&](const GAction&) {
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// FIXME: Redo
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},
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this);
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m_cut_action = GAction::create(
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"Cut", { Mod_Ctrl, Key_X }, GraphicsBitmap::load_from_file("/res/icons/cut16.png"), [&](const GAction&) {
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cut();
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},
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this);
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m_copy_action = GAction::create(
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"Copy", { Mod_Ctrl, Key_C }, GraphicsBitmap::load_from_file("/res/icons/16x16/edit-copy.png"), [&](const GAction&) {
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copy();
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},
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this);
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m_paste_action = GAction::create(
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"Paste", { Mod_Ctrl, Key_V }, GraphicsBitmap::load_from_file("/res/icons/paste16.png"), [&](const GAction&) {
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paste();
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},
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this);
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m_delete_action = GAction::create(
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"Delete", { 0, Key_Delete }, GraphicsBitmap::load_from_file("/res/icons/16x16/delete.png"), [&](const GAction&) {
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do_delete();
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},
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this);
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}
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void GTextEditor::set_text(const StringView& text)
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{
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if (is_single_line() && text.length() == m_lines[0].length() && !memcmp(text.characters_without_null_termination(), m_lines[0].characters(), text.length()))
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return;
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m_selection.clear();
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m_lines.clear();
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int start_of_current_line = 0;
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auto add_line = [&](int current_position) {
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int line_length = current_position - start_of_current_line;
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auto line = make<Line>(*this);
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if (line_length)
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line->set_text(text.substring_view(start_of_current_line, current_position - start_of_current_line));
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m_lines.append(move(line));
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start_of_current_line = current_position + 1;
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};
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int i = 0;
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for (i = 0; i < text.length(); ++i) {
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if (text[i] == '\n')
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add_line(i);
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}
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add_line(i);
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update_content_size();
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if (is_single_line())
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set_cursor(0, m_lines[0].length());
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else
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set_cursor(0, 0);
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did_update_selection();
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update();
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}
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void GTextEditor::update_content_size()
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{
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int content_width = 0;
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for (auto& line : m_lines)
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content_width = max(line.width(font()), content_width);
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content_width += m_horizontal_content_padding * 2;
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if (is_right_text_alignment(m_text_alignment))
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content_width = max(frame_inner_rect().width(), content_width);
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int content_height = line_count() * line_height();
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set_content_size({ content_width, content_height });
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set_size_occupied_by_fixed_elements({ ruler_width(), 0 });
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}
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GTextPosition GTextEditor::text_position_at(const Point& a_position) const
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{
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auto position = a_position;
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position.move_by(horizontal_scrollbar().value(), vertical_scrollbar().value());
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position.move_by(-(m_horizontal_content_padding + ruler_width()), 0);
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position.move_by(-frame_thickness(), -frame_thickness());
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int line_index = position.y() / line_height();
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line_index = max(0, min(line_index, line_count() - 1));
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int column_index;
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switch (m_text_alignment) {
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case TextAlignment::CenterLeft:
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column_index = (position.x() + glyph_width() / 2) / glyph_width();
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break;
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case TextAlignment::CenterRight:
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column_index = (position.x() - content_x_for_position({ line_index, 0 }) + glyph_width() / 2) / glyph_width();
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break;
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default:
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ASSERT_NOT_REACHED();
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}
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column_index = max(0, min(column_index, m_lines[line_index].length()));
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return { line_index, column_index };
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}
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void GTextEditor::doubleclick_event(GMouseEvent& event)
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{
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if (event.button() != GMouseButton::Left)
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return;
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m_triple_click_timer.start();
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m_in_drag_select = false;
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auto start = text_position_at(event.position());
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auto end = start;
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auto& line = m_lines[start.line()];
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while (start.column() > 0) {
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if (isspace(line.characters()[start.column() - 1]))
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break;
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start.set_column(start.column() - 1);
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}
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while (end.column() < line.length()) {
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if (isspace(line.characters()[end.column()]))
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break;
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end.set_column(end.column() + 1);
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}
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m_selection.set(start, end);
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set_cursor(end);
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update();
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did_update_selection();
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}
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void GTextEditor::mousedown_event(GMouseEvent& event)
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{
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if (event.button() != GMouseButton::Left) {
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return;
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}
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if (m_triple_click_timer.is_valid() && m_triple_click_timer.elapsed() < 250) {
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m_triple_click_timer = CElapsedTimer();
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GTextPosition start;
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GTextPosition end;
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if (is_multi_line()) {
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// select *current* line
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start = GTextPosition(m_cursor.line(), 0);
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end = GTextPosition(m_cursor.line(), m_lines[m_cursor.line()].length());
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} else {
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// select *whole* line
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start = GTextPosition(0, 0);
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end = GTextPosition(line_count() - 1, m_lines[line_count() - 1].length());
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}
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m_selection.set(start, end);
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set_cursor(end);
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return;
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}
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if (event.modifiers() & Mod_Shift) {
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if (!has_selection())
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m_selection.set(m_cursor, {});
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} else {
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m_selection.clear();
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}
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m_in_drag_select = true;
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set_cursor(text_position_at(event.position()));
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if (!(event.modifiers() & Mod_Shift)) {
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if (!has_selection())
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m_selection.set(m_cursor, {});
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}
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if (m_selection.start().is_valid() && m_selection.start() != m_cursor)
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m_selection.set_end(m_cursor);
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// FIXME: Only update the relevant rects.
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update();
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did_update_selection();
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}
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void GTextEditor::mouseup_event(GMouseEvent& event)
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{
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if (event.button() == GMouseButton::Left) {
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if (m_in_drag_select) {
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m_in_drag_select = false;
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}
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return;
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}
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}
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void GTextEditor::mousemove_event(GMouseEvent& event)
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{
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if (m_in_drag_select) {
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set_cursor(text_position_at(event.position()));
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m_selection.set_end(m_cursor);
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did_update_selection();
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update();
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return;
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}
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}
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int GTextEditor::ruler_width() const
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{
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if (!m_ruler_visible)
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return 0;
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// FIXME: Resize based on needed space.
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return 5 * font().glyph_width('x') + 4;
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}
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Rect GTextEditor::ruler_content_rect(int line_index) const
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{
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if (!m_ruler_visible)
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return {};
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return {
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0 - ruler_width() + horizontal_scrollbar().value(),
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line_index * line_height(),
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ruler_width(),
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line_height()
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};
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}
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void GTextEditor::paint_event(GPaintEvent& event)
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{
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GFrame::paint_event(event);
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GPainter painter(*this);
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painter.add_clip_rect(widget_inner_rect());
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painter.add_clip_rect(event.rect());
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painter.fill_rect(event.rect(), Color::White);
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painter.translate(frame_thickness(), frame_thickness());
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Rect ruler_rect { 0, 0, ruler_width(), height() - height_occupied_by_horizontal_scrollbar() };
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if (m_ruler_visible) {
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painter.fill_rect(ruler_rect, Color::WarmGray);
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painter.draw_line(ruler_rect.top_right(), ruler_rect.bottom_right(), Color::DarkGray);
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}
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painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
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if (m_ruler_visible)
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painter.translate(ruler_width(), 0);
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int first_visible_line = text_position_at(event.rect().top_left()).line();
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int last_visible_line = text_position_at(event.rect().bottom_right()).line();
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auto selection = normalized_selection();
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bool has_selection = selection.is_valid();
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if (m_ruler_visible) {
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for (int i = first_visible_line; i <= last_visible_line; ++i) {
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bool is_current_line = i == m_cursor.line();
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auto ruler_line_rect = ruler_content_rect(i);
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painter.draw_text(
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ruler_line_rect.shrunken(2, 0),
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String::number(i + 1),
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is_current_line ? Font::default_bold_font() : font(),
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TextAlignment::CenterRight,
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is_current_line ? Color::DarkGray : Color::MidGray);
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}
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}
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painter.add_clip_rect({ m_ruler_visible ? (ruler_rect.right() + frame_thickness() + 1) : frame_thickness(), frame_thickness(), width() - width_occupied_by_vertical_scrollbar() - ruler_width(), height() - height_occupied_by_horizontal_scrollbar() });
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for (int i = first_visible_line; i <= last_visible_line; ++i) {
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auto& line = m_lines[i];
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auto line_rect = line_content_rect(i);
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// FIXME: Make sure we always fill the entire line.
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//line_rect.set_width(exposed_width);
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if (is_multi_line() && i == m_cursor.line())
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painter.fill_rect(line_rect, Color(230, 230, 230));
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painter.draw_text(line_rect, StringView(line.characters(), line.length()), m_text_alignment, Color::Black);
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bool line_has_selection = has_selection && i >= selection.start().line() && i <= selection.end().line();
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if (line_has_selection) {
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int selection_start_column_on_line = selection.start().line() == i ? selection.start().column() : 0;
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int selection_end_column_on_line = selection.end().line() == i ? selection.end().column() : line.length();
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int selection_left = content_x_for_position({ i, selection_start_column_on_line });
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int selection_right = content_x_for_position({ i, selection_end_column_on_line });
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Rect selection_rect { selection_left, line_rect.y(), selection_right - selection_left, line_rect.height() };
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painter.fill_rect(selection_rect, Color::from_rgb(0x955233));
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painter.draw_text(selection_rect, StringView(line.characters() + selection_start_column_on_line, line.length() - selection_start_column_on_line - (line.length() - selection_end_column_on_line)), TextAlignment::CenterLeft, Color::White);
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}
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}
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if (is_focused() && m_cursor_state)
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painter.fill_rect(cursor_content_rect(), Color::Red);
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}
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void GTextEditor::toggle_selection_if_needed_for_event(const GKeyEvent& event)
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{
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if (event.shift() && !m_selection.is_valid()) {
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m_selection.set(m_cursor, {});
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did_update_selection();
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update();
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return;
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}
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if (!event.shift() && m_selection.is_valid()) {
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m_selection.clear();
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did_update_selection();
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update();
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return;
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}
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}
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void GTextEditor::select_all()
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{
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GTextPosition start_of_document { 0, 0 };
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GTextPosition end_of_document { line_count() - 1, m_lines[line_count() - 1].length() };
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m_selection.set(start_of_document, end_of_document);
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did_update_selection();
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set_cursor(end_of_document);
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update();
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}
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void GTextEditor::keydown_event(GKeyEvent& event)
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{
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if (is_single_line() && event.key() == KeyCode::Key_Tab)
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return GWidget::keydown_event(event);
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if (is_single_line() && event.key() == KeyCode::Key_Return) {
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if (on_return_pressed)
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on_return_pressed();
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return;
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}
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if (event.key() == KeyCode::Key_Escape) {
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if (on_escape_pressed)
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on_escape_pressed();
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return;
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}
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if (event.key() == KeyCode::Key_Up) {
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if (m_cursor.line() > 0) {
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int new_line = m_cursor.line() - 1;
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int new_column = min(m_cursor.column(), m_lines[new_line].length());
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toggle_selection_if_needed_for_event(event);
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set_cursor(new_line, new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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}
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return;
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}
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if (event.key() == KeyCode::Key_Down) {
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if (m_cursor.line() < (m_lines.size() - 1)) {
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int new_line = m_cursor.line() + 1;
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int new_column = min(m_cursor.column(), m_lines[new_line].length());
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toggle_selection_if_needed_for_event(event);
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set_cursor(new_line, new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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}
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return;
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}
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if (event.key() == KeyCode::Key_PageUp) {
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if (m_cursor.line() > 0) {
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int new_line = max(0, m_cursor.line() - visible_content_rect().height() / line_height());
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int new_column = min(m_cursor.column(), m_lines[new_line].length());
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toggle_selection_if_needed_for_event(event);
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set_cursor(new_line, new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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}
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return;
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}
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if (event.key() == KeyCode::Key_PageDown) {
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if (m_cursor.line() < (m_lines.size() - 1)) {
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int new_line = min(line_count() - 1, m_cursor.line() + visible_content_rect().height() / line_height());
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int new_column = min(m_cursor.column(), m_lines[new_line].length());
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toggle_selection_if_needed_for_event(event);
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set_cursor(new_line, new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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}
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return;
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}
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if (event.key() == KeyCode::Key_Left) {
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if (m_cursor.column() > 0) {
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int new_column = m_cursor.column() - 1;
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toggle_selection_if_needed_for_event(event);
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set_cursor(m_cursor.line(), new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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} else if (m_cursor.line() > 0) {
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int new_line = m_cursor.line() - 1;
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int new_column = m_lines[new_line].length();
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toggle_selection_if_needed_for_event(event);
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set_cursor(new_line, new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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}
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return;
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}
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if (event.key() == KeyCode::Key_Right) {
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if (m_cursor.column() < current_line().length()) {
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int new_column = m_cursor.column() + 1;
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toggle_selection_if_needed_for_event(event);
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set_cursor(m_cursor.line(), new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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} else if (m_cursor.line() != line_count() - 1) {
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int new_line = m_cursor.line() + 1;
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int new_column = 0;
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toggle_selection_if_needed_for_event(event);
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set_cursor(new_line, new_column);
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if (m_selection.start().is_valid()) {
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m_selection.set_end(m_cursor);
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did_update_selection();
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}
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}
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return;
|
|
}
|
|
if (!event.ctrl() && event.key() == KeyCode::Key_Home) {
|
|
toggle_selection_if_needed_for_event(event);
|
|
set_cursor(m_cursor.line(), 0);
|
|
if (m_selection.start().is_valid()) {
|
|
m_selection.set_end(m_cursor);
|
|
did_update_selection();
|
|
}
|
|
return;
|
|
}
|
|
if (!event.ctrl() && event.key() == KeyCode::Key_End) {
|
|
toggle_selection_if_needed_for_event(event);
|
|
set_cursor(m_cursor.line(), current_line().length());
|
|
if (m_selection.start().is_valid()) {
|
|
m_selection.set_end(m_cursor);
|
|
did_update_selection();
|
|
}
|
|
return;
|
|
}
|
|
if (event.ctrl() && event.key() == KeyCode::Key_Home) {
|
|
toggle_selection_if_needed_for_event(event);
|
|
set_cursor(0, 0);
|
|
if (m_selection.start().is_valid()) {
|
|
m_selection.set_end(m_cursor);
|
|
did_update_selection();
|
|
}
|
|
return;
|
|
}
|
|
if (event.ctrl() && event.key() == KeyCode::Key_End) {
|
|
toggle_selection_if_needed_for_event(event);
|
|
set_cursor(line_count() - 1, m_lines[line_count() - 1].length());
|
|
if (m_selection.start().is_valid()) {
|
|
m_selection.set_end(m_cursor);
|
|
did_update_selection();
|
|
}
|
|
return;
|
|
}
|
|
if (event.modifiers() == Mod_Ctrl && event.key() == KeyCode::Key_A) {
|
|
select_all();
|
|
return;
|
|
}
|
|
|
|
if (event.key() == KeyCode::Key_Backspace) {
|
|
if (is_readonly())
|
|
return;
|
|
if (has_selection()) {
|
|
delete_selection();
|
|
did_update_selection();
|
|
return;
|
|
}
|
|
if (m_cursor.column() > 0) {
|
|
// Backspace within line
|
|
current_line().remove(m_cursor.column() - 1);
|
|
update_content_size();
|
|
set_cursor(m_cursor.line(), m_cursor.column() - 1);
|
|
return;
|
|
}
|
|
if (m_cursor.column() == 0 && m_cursor.line() != 0) {
|
|
// Backspace at column 0; merge with previous line
|
|
auto& previous_line = m_lines[m_cursor.line() - 1];
|
|
int previous_length = previous_line.length();
|
|
previous_line.append(current_line().characters(), current_line().length());
|
|
m_lines.remove(m_cursor.line());
|
|
update_content_size();
|
|
update();
|
|
set_cursor(m_cursor.line() - 1, previous_length);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (event.modifiers() == Mod_Shift && event.key() == KeyCode::Key_Delete) {
|
|
if (is_readonly())
|
|
return;
|
|
delete_current_line();
|
|
return;
|
|
}
|
|
|
|
if (event.key() == KeyCode::Key_Delete) {
|
|
if (is_readonly())
|
|
return;
|
|
do_delete();
|
|
return;
|
|
}
|
|
|
|
if (!is_readonly() && !event.ctrl() && !event.alt() && !event.text().is_empty())
|
|
insert_at_cursor_or_replace_selection(event.text());
|
|
}
|
|
|
|
void GTextEditor::delete_current_line()
|
|
{
|
|
if (has_selection())
|
|
return delete_selection();
|
|
|
|
m_lines.remove(m_cursor.line());
|
|
if (m_lines.is_empty())
|
|
m_lines.append(make<Line>(*this));
|
|
|
|
update_content_size();
|
|
update();
|
|
}
|
|
|
|
void GTextEditor::do_delete()
|
|
{
|
|
if (is_readonly())
|
|
return;
|
|
|
|
if (has_selection())
|
|
return delete_selection();
|
|
|
|
if (m_cursor.column() < current_line().length()) {
|
|
// Delete within line
|
|
current_line().remove(m_cursor.column());
|
|
did_change();
|
|
update_cursor();
|
|
return;
|
|
}
|
|
if (m_cursor.column() == current_line().length() && m_cursor.line() != line_count() - 1) {
|
|
// Delete at end of line; merge with next line
|
|
auto& next_line = m_lines[m_cursor.line() + 1];
|
|
int previous_length = current_line().length();
|
|
current_line().append(next_line.characters(), next_line.length());
|
|
m_lines.remove(m_cursor.line() + 1);
|
|
update();
|
|
did_change();
|
|
set_cursor(m_cursor.line(), previous_length);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void GTextEditor::insert_at_cursor(const StringView& text)
|
|
{
|
|
// FIXME: This should obviously not be implemented this way.
|
|
for (int i = 0; i < text.length(); ++i) {
|
|
insert_at_cursor(text[i]);
|
|
}
|
|
}
|
|
|
|
void GTextEditor::insert_at_cursor(char ch)
|
|
{
|
|
bool at_head = m_cursor.column() == 0;
|
|
bool at_tail = m_cursor.column() == current_line().length();
|
|
if (ch == '\n') {
|
|
if (at_tail || at_head) {
|
|
String new_line_contents;
|
|
if (m_automatic_indentation_enabled && at_tail) {
|
|
int leading_spaces = 0;
|
|
auto& old_line = m_lines[m_cursor.line()];
|
|
for (int i = 0; i < old_line.length(); ++i) {
|
|
if (old_line.characters()[i] == ' ')
|
|
++leading_spaces;
|
|
else
|
|
break;
|
|
}
|
|
if (leading_spaces)
|
|
new_line_contents = String::repeated(' ', leading_spaces);
|
|
}
|
|
m_lines.insert(m_cursor.line() + (at_tail ? 1 : 0), make<Line>(*this, new_line_contents));
|
|
update();
|
|
did_change();
|
|
set_cursor(m_cursor.line() + 1, m_lines[m_cursor.line() + 1].length());
|
|
return;
|
|
}
|
|
auto new_line = make<Line>(*this);
|
|
new_line->append(current_line().characters() + m_cursor.column(), current_line().length() - m_cursor.column());
|
|
current_line().truncate(m_cursor.column());
|
|
m_lines.insert(m_cursor.line() + 1, move(new_line));
|
|
update();
|
|
did_change();
|
|
set_cursor(m_cursor.line() + 1, 0);
|
|
return;
|
|
}
|
|
if (ch == '\t') {
|
|
int next_soft_tab_stop = ((m_cursor.column() + m_soft_tab_width) / m_soft_tab_width) * m_soft_tab_width;
|
|
int spaces_to_insert = next_soft_tab_stop - m_cursor.column();
|
|
for (int i = 0; i < spaces_to_insert; ++i) {
|
|
current_line().insert(m_cursor.column(), ' ');
|
|
}
|
|
did_change();
|
|
set_cursor(m_cursor.line(), next_soft_tab_stop);
|
|
return;
|
|
}
|
|
current_line().insert(m_cursor.column(), ch);
|
|
did_change();
|
|
set_cursor(m_cursor.line(), m_cursor.column() + 1);
|
|
}
|
|
|
|
int GTextEditor::content_x_for_position(const GTextPosition& position) const
|
|
{
|
|
auto& line = m_lines[position.line()];
|
|
switch (m_text_alignment) {
|
|
case TextAlignment::CenterLeft:
|
|
return m_horizontal_content_padding + position.column() * glyph_width();
|
|
case TextAlignment::CenterRight:
|
|
return content_width() - m_horizontal_content_padding - (line.length() * glyph_width()) + (position.column() * glyph_width());
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
}
|
|
}
|
|
|
|
Rect GTextEditor::content_rect_for_position(const GTextPosition& position) const
|
|
{
|
|
if (!position.is_valid())
|
|
return {};
|
|
ASSERT(!m_lines.is_empty());
|
|
ASSERT(position.column() <= (current_line().length() + 1));
|
|
|
|
int x = content_x_for_position(position);
|
|
|
|
if (is_single_line()) {
|
|
Rect rect { x, 0, 1, font().glyph_height() + 2 };
|
|
rect.center_vertically_within({ {}, frame_inner_rect().size() });
|
|
return rect;
|
|
}
|
|
return { x, position.line() * line_height(), 1, line_height() };
|
|
}
|
|
|
|
|
|
Rect GTextEditor::cursor_content_rect() const
|
|
{
|
|
return content_rect_for_position(m_cursor);
|
|
}
|
|
|
|
Rect GTextEditor::line_widget_rect(int line_index) const
|
|
{
|
|
auto rect = line_content_rect(line_index);
|
|
rect.set_x(frame_thickness());
|
|
rect.set_width(frame_inner_rect().width());
|
|
rect.move_by(0, -(vertical_scrollbar().value()));
|
|
rect.move_by(0, frame_thickness());
|
|
rect.intersect(frame_inner_rect());
|
|
return rect;
|
|
}
|
|
|
|
void GTextEditor::scroll_position_into_view(const GTextPosition& 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() == m_lines[position.line()].length())
|
|
rect.set_x(content_x_for_position({ position.line(), m_lines[position.line()].length() }) + 2);
|
|
scroll_into_view(rect, true, true);
|
|
}
|
|
|
|
void GTextEditor::scroll_cursor_into_view()
|
|
{
|
|
scroll_position_into_view(m_cursor);
|
|
}
|
|
|
|
Rect GTextEditor::line_content_rect(int line_index) const
|
|
{
|
|
auto& line = m_lines[line_index];
|
|
if (is_single_line()) {
|
|
Rect line_rect = { content_x_for_position({ line_index, 0 }), 0, line.length() * glyph_width(), font().glyph_height() + 2 };
|
|
line_rect.center_vertically_within({ {}, frame_inner_rect().size() });
|
|
return line_rect;
|
|
}
|
|
return {
|
|
content_x_for_position({ line_index, 0 }),
|
|
line_index * line_height(),
|
|
line.length() * glyph_width(),
|
|
line_height()
|
|
};
|
|
}
|
|
|
|
void GTextEditor::update_cursor()
|
|
{
|
|
update(line_widget_rect(m_cursor.line()));
|
|
}
|
|
|
|
void GTextEditor::set_cursor(int line, int column)
|
|
{
|
|
set_cursor({ line, column });
|
|
}
|
|
|
|
void GTextEditor::set_cursor(const GTextPosition& position)
|
|
{
|
|
ASSERT(!m_lines.is_empty());
|
|
ASSERT(position.line() < m_lines.size());
|
|
ASSERT(position.column() <= m_lines[position.line()].length());
|
|
if (m_cursor != position) {
|
|
// NOTE: If the old cursor is no longer valid, repaint everything just in case.
|
|
auto old_cursor_line_rect = m_cursor.line() < m_lines.size()
|
|
? 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();
|
|
}
|
|
if (on_cursor_change)
|
|
on_cursor_change();
|
|
}
|
|
|
|
void GTextEditor::focusin_event(CEvent&)
|
|
{
|
|
update_cursor();
|
|
start_timer(500);
|
|
}
|
|
|
|
void GTextEditor::focusout_event(CEvent&)
|
|
{
|
|
stop_timer();
|
|
}
|
|
|
|
void GTextEditor::timer_event(CTimerEvent&)
|
|
{
|
|
m_cursor_state = !m_cursor_state;
|
|
if (is_focused())
|
|
update_cursor();
|
|
}
|
|
|
|
GTextEditor::Line::Line(GTextEditor& editor)
|
|
: m_editor(editor)
|
|
{
|
|
clear();
|
|
}
|
|
|
|
GTextEditor::Line::Line(GTextEditor& editor, const StringView& text)
|
|
: m_editor(editor)
|
|
{
|
|
set_text(text);
|
|
}
|
|
|
|
void GTextEditor::Line::clear()
|
|
{
|
|
m_text.clear();
|
|
m_text.append(0);
|
|
}
|
|
|
|
void GTextEditor::Line::set_text(const StringView& text)
|
|
{
|
|
if (text.length() == length() && !memcmp(text.characters_without_null_termination(), characters(), length()))
|
|
return;
|
|
if (text.is_empty()) {
|
|
clear();
|
|
return;
|
|
}
|
|
m_text.resize(text.length() + 1);
|
|
memcpy(m_text.data(), text.characters_without_null_termination(), text.length() + 1);
|
|
}
|
|
|
|
int GTextEditor::Line::width(const Font& font) const
|
|
{
|
|
return font.glyph_width('x') * length();
|
|
}
|
|
|
|
void GTextEditor::Line::append(const char* characters, int length)
|
|
{
|
|
int old_length = m_text.size() - 1;
|
|
m_text.resize(m_text.size() + length);
|
|
memcpy(m_text.data() + old_length, characters, length);
|
|
m_text.last() = 0;
|
|
}
|
|
|
|
void GTextEditor::Line::append(char ch)
|
|
{
|
|
insert(length(), ch);
|
|
}
|
|
|
|
void GTextEditor::Line::prepend(char ch)
|
|
{
|
|
insert(0, ch);
|
|
}
|
|
|
|
void GTextEditor::Line::insert(int index, char ch)
|
|
{
|
|
if (index == length()) {
|
|
m_text.last() = ch;
|
|
m_text.append(0);
|
|
} else {
|
|
m_text.insert(index, move(ch));
|
|
}
|
|
}
|
|
|
|
void GTextEditor::Line::remove(int index)
|
|
{
|
|
if (index == length()) {
|
|
m_text.take_last();
|
|
m_text.last() = 0;
|
|
} else {
|
|
m_text.remove(index);
|
|
}
|
|
}
|
|
|
|
void GTextEditor::Line::truncate(int length)
|
|
{
|
|
m_text.resize(length + 1);
|
|
m_text.last() = 0;
|
|
}
|
|
|
|
bool GTextEditor::write_to_file(const StringView& path)
|
|
{
|
|
int fd = open_with_path_length(path.characters_without_null_termination(), path.length(), O_WRONLY | O_CREAT | O_TRUNC, 0666);
|
|
if (fd < 0) {
|
|
perror("open");
|
|
return false;
|
|
}
|
|
for (int i = 0; i < m_lines.size(); ++i) {
|
|
auto& line = m_lines[i];
|
|
if (line.length()) {
|
|
ssize_t nwritten = write(fd, line.characters(), line.length());
|
|
if (nwritten < 0) {
|
|
perror("write");
|
|
close(fd);
|
|
return false;
|
|
}
|
|
}
|
|
if (i != m_lines.size() - 1) {
|
|
char ch = '\n';
|
|
ssize_t nwritten = write(fd, &ch, 1);
|
|
if (nwritten != 1) {
|
|
perror("write");
|
|
close(fd);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
close(fd);
|
|
return true;
|
|
}
|
|
|
|
String GTextEditor::text() const
|
|
{
|
|
StringBuilder builder;
|
|
for (int i = 0; i < line_count(); ++i) {
|
|
auto& line = m_lines[i];
|
|
builder.append(line.characters(), line.length());
|
|
if (i != line_count() - 1)
|
|
builder.append('\n');
|
|
}
|
|
return builder.to_string();
|
|
}
|
|
|
|
void GTextEditor::clear()
|
|
{
|
|
m_lines.clear();
|
|
m_lines.append(make<Line>(*this));
|
|
m_selection.clear();
|
|
did_update_selection();
|
|
set_cursor(0, 0);
|
|
update();
|
|
}
|
|
|
|
String GTextEditor::selected_text() const
|
|
{
|
|
if (!has_selection())
|
|
return {};
|
|
|
|
auto selection = normalized_selection();
|
|
StringBuilder builder;
|
|
for (int i = selection.start().line(); i <= selection.end().line(); ++i) {
|
|
auto& line = m_lines[i];
|
|
int selection_start_column_on_line = selection.start().line() == i ? selection.start().column() : 0;
|
|
int selection_end_column_on_line = selection.end().line() == i ? selection.end().column() : line.length();
|
|
builder.append(line.characters() + selection_start_column_on_line, selection_end_column_on_line - selection_start_column_on_line);
|
|
if (i != selection.end().line())
|
|
builder.append('\n');
|
|
}
|
|
|
|
return builder.to_string();
|
|
}
|
|
|
|
void GTextEditor::delete_selection()
|
|
{
|
|
if (!has_selection())
|
|
return;
|
|
|
|
auto selection = normalized_selection();
|
|
|
|
// First delete all the lines in between the first and last one.
|
|
for (int i = selection.start().line() + 1; i < selection.end().line();) {
|
|
m_lines.remove(i);
|
|
selection.end().set_line(selection.end().line() - 1);
|
|
}
|
|
|
|
if (selection.start().line() == selection.end().line()) {
|
|
// Delete within same line.
|
|
auto& line = m_lines[selection.start().line()];
|
|
bool whole_line_is_selected = selection.start().column() == 0 && selection.end().column() == line.length();
|
|
if (whole_line_is_selected) {
|
|
line.clear();
|
|
} else {
|
|
auto before_selection = String(line.characters(), line.length()).substring(0, selection.start().column());
|
|
auto after_selection = String(line.characters(), line.length()).substring(selection.end().column(), line.length() - selection.end().column());
|
|
StringBuilder builder(before_selection.length() + after_selection.length());
|
|
builder.append(before_selection);
|
|
builder.append(after_selection);
|
|
line.set_text(builder.to_string());
|
|
}
|
|
} else {
|
|
// Delete across a newline, merging lines.
|
|
ASSERT(selection.start().line() == selection.end().line() - 1);
|
|
auto& first_line = m_lines[selection.start().line()];
|
|
auto& second_line = m_lines[selection.end().line()];
|
|
auto before_selection = String(first_line.characters(), first_line.length()).substring(0, selection.start().column());
|
|
auto after_selection = String(second_line.characters(), second_line.length()).substring(selection.end().column(), second_line.length() - selection.end().column());
|
|
StringBuilder builder(before_selection.length() + after_selection.length());
|
|
builder.append(before_selection);
|
|
builder.append(after_selection);
|
|
first_line.set_text(builder.to_string());
|
|
m_lines.remove(selection.end().line());
|
|
}
|
|
|
|
if (m_lines.is_empty())
|
|
m_lines.append(make<Line>(*this));
|
|
|
|
m_selection.clear();
|
|
did_update_selection();
|
|
did_change();
|
|
set_cursor(selection.start());
|
|
update();
|
|
}
|
|
|
|
void GTextEditor::insert_at_cursor_or_replace_selection(const StringView& text)
|
|
{
|
|
ASSERT(!is_readonly());
|
|
if (has_selection())
|
|
delete_selection();
|
|
insert_at_cursor(text);
|
|
}
|
|
|
|
void GTextEditor::cut()
|
|
{
|
|
if (is_readonly())
|
|
return;
|
|
auto selected_text = this->selected_text();
|
|
printf("Cut: \"%s\"\n", selected_text.characters());
|
|
GClipboard::the().set_data(selected_text);
|
|
delete_selection();
|
|
}
|
|
|
|
void GTextEditor::copy()
|
|
{
|
|
auto selected_text = this->selected_text();
|
|
printf("Copy: \"%s\"\n", selected_text.characters());
|
|
GClipboard::the().set_data(selected_text);
|
|
}
|
|
|
|
void GTextEditor::paste()
|
|
{
|
|
if (is_readonly())
|
|
return;
|
|
auto paste_text = GClipboard::the().data();
|
|
printf("Paste: \"%s\"\n", paste_text.characters());
|
|
insert_at_cursor_or_replace_selection(paste_text);
|
|
}
|
|
|
|
void GTextEditor::enter_event(CEvent&)
|
|
{
|
|
ASSERT(window());
|
|
window()->set_override_cursor(GStandardCursor::IBeam);
|
|
}
|
|
|
|
void GTextEditor::leave_event(CEvent&)
|
|
{
|
|
ASSERT(window());
|
|
window()->set_override_cursor(GStandardCursor::None);
|
|
}
|
|
|
|
void GTextEditor::did_change()
|
|
{
|
|
ASSERT(!is_readonly());
|
|
update_content_size();
|
|
if (!m_have_pending_change_notification) {
|
|
m_have_pending_change_notification = true;
|
|
deferred_invoke([this](auto&) {
|
|
if (on_change)
|
|
on_change();
|
|
m_have_pending_change_notification = false;
|
|
});
|
|
}
|
|
}
|
|
|
|
void GTextEditor::set_readonly(bool readonly)
|
|
{
|
|
if (m_readonly == readonly)
|
|
return;
|
|
m_readonly = readonly;
|
|
m_cut_action->set_enabled(!is_readonly() && has_selection());
|
|
m_delete_action->set_enabled(!is_readonly());
|
|
m_paste_action->set_enabled(!is_readonly());
|
|
}
|
|
|
|
void GTextEditor::did_update_selection()
|
|
{
|
|
m_cut_action->set_enabled(!is_readonly() && has_selection());
|
|
m_copy_action->set_enabled(has_selection());
|
|
if (on_selection_change)
|
|
on_selection_change();
|
|
}
|
|
|
|
void GTextEditor::context_menu_event(GContextMenuEvent& event)
|
|
{
|
|
if (!m_context_menu) {
|
|
m_context_menu = make<GMenu>("GTextEditor context menu");
|
|
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->popup(event.screen_position());
|
|
}
|
|
|
|
void GTextEditor::set_text_alignment(TextAlignment alignment)
|
|
{
|
|
if (m_text_alignment == alignment)
|
|
return;
|
|
m_text_alignment = alignment;
|
|
update();
|
|
}
|
|
|
|
void GTextEditor::resize_event(GResizeEvent& event)
|
|
{
|
|
GScrollableWidget::resize_event(event);
|
|
update_content_size();
|
|
}
|
|
|
|
GTextPosition GTextEditor::next_position_after(const GTextPosition& position, ShouldWrapAtEndOfDocument should_wrap)
|
|
{
|
|
auto& line = m_lines[position.line()];
|
|
if (position.column() == line.length()) {
|
|
if (position.line() == line_count() - 1) {
|
|
if (should_wrap == ShouldWrapAtEndOfDocument::Yes)
|
|
return { 0, 0 };
|
|
return {};
|
|
}
|
|
return { position.line() + 1, 0 };
|
|
}
|
|
return { position.line(), position.column() + 1 };
|
|
}
|
|
|
|
GTextRange GTextEditor::find(const StringView& needle, const GTextPosition& start)
|
|
{
|
|
if (needle.is_empty())
|
|
return {};
|
|
|
|
GTextPosition position = start.is_valid() ? start : GTextPosition(0, 0);
|
|
GTextPosition original_position = position;
|
|
|
|
GTextPosition start_of_potential_match;
|
|
int needle_index = 0;
|
|
|
|
do {
|
|
auto ch = character_at(position);
|
|
if (ch == needle[needle_index]) {
|
|
if (needle_index == 0)
|
|
start_of_potential_match = position;
|
|
++needle_index;
|
|
if (needle_index >= needle.length())
|
|
return { start_of_potential_match, next_position_after(position) };
|
|
} else {
|
|
needle_index = 0;
|
|
}
|
|
position = next_position_after(position);
|
|
} while(position.is_valid() && position != original_position);
|
|
|
|
return {};
|
|
}
|
|
|
|
void GTextEditor::set_selection(const GTextRange& selection)
|
|
{
|
|
if (m_selection == selection)
|
|
return;
|
|
m_selection = selection;
|
|
set_cursor(m_selection.end());
|
|
scroll_position_into_view(normalized_selection().start());
|
|
update();
|
|
}
|
|
|
|
char GTextEditor::character_at(const GTextPosition& position) const
|
|
{
|
|
ASSERT(position.line() < line_count());
|
|
auto& line = m_lines[position.line()];
|
|
if (position.column() == line.length())
|
|
return '\n';
|
|
return line.characters()[position.column()];
|
|
}
|