cf13cf7225
Fixes an edge case in which mousing down on the active glyph within a larger selection would reset the selection but fail to update the glyph map. Now we can grow or shrink the selection by dragging the active glyph even after an initial selection is made.
377 lines
13 KiB
C++
377 lines
13 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 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 "GlyphMapWidget.h"
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#include <LibGUI/Painter.h>
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#include <LibGfx/BitmapFont.h>
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#include <LibGfx/Emoji.h>
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#include <LibGfx/Palette.h>
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REGISTER_WIDGET(GUI, GlyphMapWidget);
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namespace GUI {
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GlyphMapWidget::Selection GlyphMapWidget::Selection::normalized() const
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{
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if (m_size > 0)
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return *this;
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return { m_start + m_size, -m_size + 1 };
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}
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void GlyphMapWidget::Selection::resize_by(int i)
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{
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m_size += i;
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if (m_size == 0) {
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if (i < 0)
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m_size--;
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else
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m_size++;
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}
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}
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bool GlyphMapWidget::Selection::contains(int i) const
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{
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auto this_normalized = normalized();
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return i >= this_normalized.m_start && i < this_normalized.m_start + this_normalized.m_size;
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}
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void GlyphMapWidget::Selection::extend_to(int glyph)
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{
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m_size = glyph - m_start;
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if (m_size > 0)
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m_size++;
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}
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GlyphMapWidget::GlyphMapWidget()
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{
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set_focus_policy(FocusPolicy::StrongFocus);
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horizontal_scrollbar().set_visible(false);
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did_change_font();
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set_active_glyph('A');
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}
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void GlyphMapWidget::resize_event(ResizeEvent& event)
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{
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recalculate_content_size();
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AbstractScrollableWidget::resize_event(event);
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}
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void GlyphMapWidget::set_active_glyph(int glyph, ShouldResetSelection should_reset_selection)
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{
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if (m_active_glyph == glyph)
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return;
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m_active_glyph = glyph;
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if (should_reset_selection == ShouldResetSelection::Yes) {
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m_selection.set_start(glyph);
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m_selection.set_size(1);
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}
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if (on_active_glyph_changed)
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on_active_glyph_changed(glyph);
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update();
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}
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Gfx::IntRect GlyphMapWidget::get_outer_rect(int glyph) const
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{
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glyph -= m_active_range.first;
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int row = glyph / columns();
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int column = glyph % columns();
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return Gfx::IntRect {
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column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
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row * (font().glyph_height() + m_vertical_spacing) + 1,
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font().max_glyph_width() + m_horizontal_spacing,
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font().glyph_height() + m_horizontal_spacing
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}
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.translated(frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value());
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}
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void GlyphMapWidget::update_glyph(int glyph)
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{
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update(get_outer_rect(glyph));
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}
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void GlyphMapWidget::paint_event(PaintEvent& event)
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{
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Frame::paint_event(event);
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Painter 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.set_font(font());
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painter.fill_rect(widget_inner_rect(), palette().window().darkened(0.8f));
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int scroll_steps = vertical_scrollbar().value() / vertical_scrollbar().step();
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int first_visible_glyph = scroll_steps * columns();
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int range_offset = m_active_range.first;
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int last_glyph = m_active_range.last + 1;
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for (int glyph = first_visible_glyph + range_offset; glyph <= first_visible_glyph + m_visible_glyphs + range_offset && glyph < last_glyph; ++glyph) {
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Gfx::IntRect outer_rect = get_outer_rect(glyph);
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Gfx::IntRect inner_rect(
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outer_rect.x() + m_horizontal_spacing / 2,
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outer_rect.y() + m_vertical_spacing / 2,
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font().max_glyph_width(),
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font().glyph_height());
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if (m_selection.contains(glyph)) {
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painter.fill_rect(outer_rect, is_focused() ? palette().selection() : palette().inactive_selection());
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if (font().contains_glyph(glyph))
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painter.draw_glyph(inner_rect.location(), glyph, is_focused() ? palette().selection_text() : palette().inactive_selection_text());
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else if (auto* emoji = Gfx::Emoji::emoji_for_code_point(glyph))
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painter.draw_emoji(inner_rect.location(), *emoji, font());
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} else if (font().contains_glyph(glyph)) {
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painter.fill_rect(outer_rect, palette().base());
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painter.draw_glyph(inner_rect.location(), glyph, palette().base_text());
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} else if (auto* emoji = Gfx::Emoji::emoji_for_code_point(glyph)) {
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painter.fill_rect(outer_rect, Gfx::Color { 255, 150, 150 });
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painter.draw_emoji(inner_rect.location(), *emoji, font());
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} else
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painter.fill_rect(outer_rect, palette().window());
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}
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painter.draw_focus_rect(get_outer_rect(m_active_glyph), Gfx::Color::Black);
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}
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Optional<int> GlyphMapWidget::glyph_at_position(Gfx::IntPoint position) const
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{
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Gfx::IntPoint map_offset { frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value() };
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auto map_position = position - map_offset;
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auto col = (map_position.x() - 1) / ((font().max_glyph_width() + m_horizontal_spacing));
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auto row = (map_position.y() - 1) / ((font().glyph_height() + m_vertical_spacing));
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auto glyph = row * columns() + col + m_active_range.first;
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if (row >= 0 && row < rows() && col >= 0 && col < columns() && glyph < m_glyph_count + m_active_range.first)
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return glyph;
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return {};
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}
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int GlyphMapWidget::glyph_at_position_clamped(Gfx::IntPoint position) const
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{
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Gfx::IntPoint map_offset { frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value() };
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auto map_position = position - map_offset;
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auto col = clamp((map_position.x() - 1) / ((font().max_glyph_width() + m_horizontal_spacing)), 0, columns() - 1);
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auto row = clamp((map_position.y() - 1) / ((font().glyph_height() + m_vertical_spacing)), 0, rows() - 1);
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auto glyph = row * columns() + col + m_active_range.first;
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if (row == rows() - 1)
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glyph = min(glyph, m_glyph_count + m_active_range.first - 1);
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return glyph;
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}
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void GlyphMapWidget::mousedown_event(MouseEvent& event)
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{
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if (auto maybe_glyph = glyph_at_position(event.position()); maybe_glyph.has_value()) {
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auto glyph = maybe_glyph.value();
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if (event.shift())
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m_selection.extend_to(glyph);
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m_in_drag_select = true;
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set_active_glyph(glyph, event.shift() ? ShouldResetSelection::No : ShouldResetSelection::Yes);
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}
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}
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void GlyphMapWidget::mouseup_event(GUI::MouseEvent& event)
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{
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if (!m_in_drag_select)
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return;
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auto constrained = event.position().constrained(widget_inner_rect());
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if (auto maybe_glyph = glyph_at_position(constrained); maybe_glyph.has_value()) {
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auto glyph = maybe_glyph.value();
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m_selection.extend_to(glyph);
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set_active_glyph(glyph, ShouldResetSelection::No);
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}
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m_in_drag_select = false;
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}
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void GlyphMapWidget::mousemove_event(GUI::MouseEvent& event)
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{
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if (!m_in_drag_select)
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return;
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auto glyph = glyph_at_position_clamped(event.position());
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m_selection.extend_to(glyph);
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set_active_glyph(glyph, ShouldResetSelection::No);
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scroll_to_glyph(glyph);
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update();
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}
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void GlyphMapWidget::doubleclick_event(MouseEvent& event)
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{
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if (on_glyph_double_clicked) {
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if (auto maybe_glyph = glyph_at_position(event.position()); maybe_glyph.has_value())
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on_glyph_double_clicked(maybe_glyph.value());
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}
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}
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void GlyphMapWidget::keydown_event(KeyEvent& event)
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{
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Widget::keydown_event(event);
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int range_offset = m_active_range.first;
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if (!event.ctrl() && !event.shift()) {
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m_selection.set_size(1);
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m_selection.set_start(m_active_glyph);
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}
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if (event.key() == KeyCode::Key_Up) {
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if (m_selection.start() - range_offset >= m_columns) {
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if (event.shift())
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m_selection.resize_by(-m_columns);
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else
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m_selection.set_start(m_selection.start() - m_columns);
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set_active_glyph(m_active_glyph - m_columns, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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if (event.key() == KeyCode::Key_Down) {
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if (m_selection.start() < m_glyph_count + range_offset - m_columns) {
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if (event.shift())
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m_selection.resize_by(m_columns);
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else
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m_selection.set_start(m_selection.start() + m_columns);
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set_active_glyph(m_active_glyph + m_columns, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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if (event.key() == KeyCode::Key_Left) {
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if (m_selection.start() > range_offset) {
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if (event.shift())
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m_selection.resize_by(-1);
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else
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m_selection.set_start(m_selection.start() - 1);
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set_active_glyph(m_active_glyph - 1, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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if (event.key() == KeyCode::Key_Right) {
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if (m_selection.start() < m_glyph_count + range_offset - 1) {
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if (event.shift())
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m_selection.resize_by(1);
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else
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m_selection.set_start(m_selection.start() + 1);
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set_active_glyph(m_active_glyph + 1, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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// FIXME: Support selection for these.
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if (event.ctrl() && event.key() == KeyCode::Key_Home) {
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set_active_glyph(m_active_range.first);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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if (event.ctrl() && event.key() == KeyCode::Key_End) {
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set_active_glyph(m_active_range.last);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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if (!event.ctrl() && event.key() == KeyCode::Key_Home) {
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auto start_of_row = (m_active_glyph - range_offset) / m_columns * m_columns;
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set_active_glyph(start_of_row + range_offset);
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return;
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}
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if (!event.ctrl() && event.key() == KeyCode::Key_End) {
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auto end_of_row = (m_active_glyph - range_offset) / m_columns * m_columns + (m_columns - 1);
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end_of_row = clamp(end_of_row + range_offset, m_active_range.first, m_active_range.last);
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set_active_glyph(end_of_row);
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return;
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}
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}
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void GlyphMapWidget::did_change_font()
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{
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recalculate_content_size();
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vertical_scrollbar().set_step(font().glyph_height() + m_vertical_spacing);
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}
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void GlyphMapWidget::scroll_to_glyph(int glyph)
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{
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glyph -= m_active_range.first;
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int row = glyph / columns();
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int column = glyph % columns();
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auto scroll_rect = Gfx::IntRect {
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column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
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row * (font().glyph_height() + m_vertical_spacing) + 1,
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font().max_glyph_width() + m_horizontal_spacing,
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font().glyph_height() + m_horizontal_spacing
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};
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scroll_into_view(scroll_rect, true, true);
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}
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void GlyphMapWidget::select_previous_existing_glyph()
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{
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bool search_wrapped = false;
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int first_glyph = m_active_range.first;
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int last_glyph = m_active_range.last;
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for (int i = active_glyph() - 1;; --i) {
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if (i < first_glyph && !search_wrapped) {
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i = last_glyph;
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search_wrapped = true;
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} else if (i < first_glyph && search_wrapped) {
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break;
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}
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if (font().contains_glyph(i)) {
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set_focus(true);
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set_active_glyph(i);
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scroll_to_glyph(i);
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break;
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}
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}
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}
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void GlyphMapWidget::select_next_existing_glyph()
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{
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bool search_wrapped = false;
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int first_glyph = m_active_range.first;
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int last_glyph = m_active_range.last;
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for (int i = active_glyph() + 1;; ++i) {
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if (i > last_glyph && !search_wrapped) {
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i = first_glyph;
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search_wrapped = true;
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} else if (i > last_glyph && search_wrapped) {
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break;
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}
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if (font().contains_glyph(i)) {
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set_focus(true);
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set_active_glyph(i);
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scroll_to_glyph(i);
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break;
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}
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}
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}
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void GlyphMapWidget::recalculate_content_size()
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{
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auto inner_rect = frame_inner_rect();
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int event_width = inner_rect.width() - vertical_scrollbar().width() - m_horizontal_spacing;
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int event_height = inner_rect.height();
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m_visible_glyphs = (event_width * event_height) / (font().max_glyph_width() * font().glyph_height());
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m_columns = max(event_width / (font().max_glyph_width() + m_horizontal_spacing), 1);
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m_rows = ceil_div(m_glyph_count, m_columns);
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int content_width = columns() * (font().max_glyph_width() + m_horizontal_spacing);
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int content_height = rows() * (font().glyph_height() + m_vertical_spacing) + frame_thickness();
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set_content_size({ content_width, content_height });
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scroll_to_glyph(m_active_glyph);
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}
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void GlyphMapWidget::set_active_range(Unicode::CodePointRange range)
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{
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if (m_active_range.first == range.first && m_active_range.last == range.last)
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return;
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m_active_range = range;
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m_glyph_count = range.last - range.first + 1;
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set_active_glyph(range.first);
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recalculate_content_size();
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update();
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}
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}
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