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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "GlyphMapWidget.h"
#include <LibGUI/Painter.h>
#include <LibGfx/BitmapFont.h>
#include <LibGfx/Emoji.h>
#include <LibGfx/Palette.h>
namespace GUI {
GlyphMapWidget::Selection GlyphMapWidget::Selection::normalized() const
{
if (m_size > 0)
return *this;
return { m_start + m_size, -m_size + 1 };
}
void GlyphMapWidget::Selection::resize_by(int i)
{
m_size += i;
if (m_size == 0) {
if (i < 0)
m_size--;
else
m_size++;
}
}
bool GlyphMapWidget::Selection::contains(int i) const
{
auto this_normalized = normalized();
return i >= this_normalized.m_start && i < this_normalized.m_start + this_normalized.m_size;
}
void GlyphMapWidget::Selection::extend_to(int glyph)
{
m_size = glyph - m_start;
if (m_size > 0)
m_size++;
}
GlyphMapWidget::GlyphMapWidget()
{
set_focus_policy(FocusPolicy::StrongFocus);
horizontal_scrollbar().set_visible(false);
}
GlyphMapWidget::~GlyphMapWidget()
{
}
void GlyphMapWidget::initialize(Gfx::BitmapFont& mutable_font)
{
if (m_font == mutable_font)
return;
m_font = mutable_font;
vertical_scrollbar().set_step(font().glyph_height() + m_vertical_spacing);
set_active_glyph('A');
}
void GlyphMapWidget::resize_event(ResizeEvent& event)
{
if (!m_font)
return;
int event_width = event.size().width() - vertical_scrollbar().width() - (frame_thickness() * 2) - m_horizontal_spacing;
int event_height = event.size().height() - (frame_thickness() * 2);
m_visible_glyphs = (event_width * event_height) / (font().max_glyph_width() * font().glyph_height());
m_columns = max(event_width / (font().max_glyph_width() + m_horizontal_spacing), 1);
m_rows = ceil_div(m_glyph_count, m_columns);
int content_width = columns() * (font().max_glyph_width() + m_horizontal_spacing);
int content_height = rows() * (font().glyph_height() + m_vertical_spacing) + frame_thickness();
set_content_size({ content_width, content_height });
scroll_to_glyph(m_active_glyph);
AbstractScrollableWidget::resize_event(event);
}
void GlyphMapWidget::set_active_glyph(int glyph, ShouldResetSelection should_reset_selection)
{
if (m_active_glyph == glyph)
return;
m_active_glyph = glyph;
if (should_reset_selection == ShouldResetSelection::Yes) {
m_selection.set_start(glyph);
m_selection.set_size(1);
}
if (on_active_glyph_changed)
on_active_glyph_changed(glyph);
update();
}
Gfx::IntRect GlyphMapWidget::get_outer_rect(int glyph) const
{
int row = glyph / columns();
int column = glyph % columns();
return Gfx::IntRect {
column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
row * (font().glyph_height() + m_vertical_spacing) + 1,
font().max_glyph_width() + m_horizontal_spacing,
font().glyph_height() + m_horizontal_spacing
}
.translated(frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value());
}
void GlyphMapWidget::update_glyph(int glyph)
{
update(get_outer_rect(glyph));
}
void GlyphMapWidget::paint_event(PaintEvent& event)
{
Frame::paint_event(event);
Painter painter(*this);
painter.add_clip_rect(widget_inner_rect());
painter.add_clip_rect(event.rect());
painter.set_font(font());
painter.fill_rect(widget_inner_rect(), palette().inactive_window_title());
int scroll_steps = vertical_scrollbar().value() / vertical_scrollbar().step();
int first_visible_glyph = scroll_steps * columns();
for (int glyph = first_visible_glyph; glyph <= first_visible_glyph + m_visible_glyphs && glyph < m_glyph_count; ++glyph) {
Gfx::IntRect outer_rect = get_outer_rect(glyph);
Gfx::IntRect inner_rect(
outer_rect.x() + m_horizontal_spacing / 2,
outer_rect.y() + m_vertical_spacing / 2,
font().max_glyph_width(),
font().glyph_height());
if (m_selection.contains(glyph)) {
painter.fill_rect(outer_rect, is_focused() ? palette().selection() : palette().inactive_selection());
if (m_font->contains_raw_glyph(glyph))
painter.draw_glyph(inner_rect.location(), glyph, is_focused() ? palette().selection_text() : palette().inactive_selection_text());
else if (auto* emoji = Gfx::Emoji::emoji_for_code_point(glyph))
painter.draw_emoji(inner_rect.location(), *emoji, *m_font);
} else if (m_font->contains_raw_glyph(glyph)) {
painter.fill_rect(outer_rect, palette().base());
painter.draw_glyph(inner_rect.location(), glyph, palette().base_text());
} else if (auto* emoji = Gfx::Emoji::emoji_for_code_point(glyph)) {
painter.fill_rect(outer_rect, Gfx::Color { 255, 150, 150 });
painter.draw_emoji(inner_rect.location(), *emoji, *m_font);
}
}
painter.draw_focus_rect(get_outer_rect(m_active_glyph), Gfx::Color::Black);
}
void GlyphMapWidget::mousedown_event(MouseEvent& event)
{
Frame::mousedown_event(event);
Gfx::IntPoint map_offset { frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value() };
auto map_position = event.position() - map_offset;
auto col = (map_position.x() - 1) / ((font().max_glyph_width() + m_horizontal_spacing));
auto row = (map_position.y() - 1) / ((font().glyph_height() + m_vertical_spacing));
auto glyph = row * columns() + col;
if (row >= 0 && row < rows() && col >= 0 && col < columns() && glyph < m_glyph_count) {
if (event.shift())
m_selection.extend_to(glyph);
else {
m_selection.set_size(1);
m_selection.set_start(glyph);
}
set_active_glyph(glyph, ShouldResetSelection::No);
}
}
void GlyphMapWidget::keydown_event(KeyEvent& event)
{
Frame::keydown_event(event);
if (!event.ctrl() && !event.shift()) {
m_selection.set_size(1);
m_selection.set_start(m_active_glyph);
}
if (event.key() == KeyCode::Key_Up) {
if (m_selection.start() >= m_columns) {
if (event.shift())
m_selection.resize_by(-m_columns);
else
m_selection.set_start(m_selection.start() - m_columns);
set_active_glyph(m_active_glyph - m_columns, ShouldResetSelection::No);
scroll_to_glyph(m_active_glyph);
return;
}
}
if (event.key() == KeyCode::Key_Down) {
if (m_selection.start() < m_glyph_count - m_columns) {
if (event.shift())
m_selection.resize_by(m_columns);
else
m_selection.set_start(m_selection.start() + m_columns);
set_active_glyph(m_active_glyph + m_columns, ShouldResetSelection::No);
scroll_to_glyph(m_active_glyph);
return;
}
}
if (event.key() == KeyCode::Key_Left) {
if (m_selection.start() > 0) {
if (event.shift())
m_selection.resize_by(-1);
else
m_selection.set_start(m_selection.start() - 1);
set_active_glyph(m_active_glyph - 1, ShouldResetSelection::No);
scroll_to_glyph(m_active_glyph);
return;
}
}
if (event.key() == KeyCode::Key_Right) {
if (m_selection.start() < m_glyph_count - 1) {
if (event.shift())
m_selection.resize_by(1);
else
m_selection.set_start(m_selection.start() + 1);
set_active_glyph(m_active_glyph + 1, ShouldResetSelection::No);
scroll_to_glyph(m_active_glyph);
return;
}
}
// FIXME: Support selection for these.
if (event.ctrl() && event.key() == KeyCode::Key_Home) {
set_active_glyph(0);
scroll_to_glyph(m_active_glyph);
return;
}
if (event.ctrl() && event.key() == KeyCode::Key_End) {
set_active_glyph(m_glyph_count - 1);
scroll_to_glyph(m_active_glyph);
return;
}
if (!event.ctrl() && event.key() == KeyCode::Key_Home) {
set_active_glyph(m_active_glyph / m_columns * m_columns);
return;
}
if (!event.ctrl() && event.key() == KeyCode::Key_End) {
int new_selection = m_active_glyph / m_columns * m_columns + (m_columns - 1);
int max = m_glyph_count - 1;
new_selection = clamp(new_selection, 0, max);
set_active_glyph(new_selection);
return;
}
}
void GlyphMapWidget::scroll_to_glyph(int glyph)
{
int row = glyph / columns();
int column = glyph % columns();
auto scroll_rect = Gfx::IntRect {
column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
row * (font().glyph_height() + m_vertical_spacing) + 1,
font().max_glyph_width() + m_horizontal_spacing,
font().glyph_height() + m_horizontal_spacing
};
scroll_into_view(scroll_rect, true, true);
}
}
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