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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "GlyphMapWidget.h"
#include <LibGUI/Painter.h>
#include <LibGfx/BitmapFont.h>
#include <LibGfx/Palette.h>
GlyphMapWidget::GlyphMapWidget()
{
set_focus_policy(GUI::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;
m_glyph_count = mutable_font.glyph_count();
m_selected_glyph = 0;
vertical_scrollbar().set_step(font().glyph_height() + m_vertical_spacing);
}
void GlyphMapWidget::resize_event(GUI::ResizeEvent& event)
{
int event_width = event.size().width() - this->vertical_scrollbar().width() - (frame_thickness() * 2) - m_horizontal_spacing;
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 });
AbstractScrollableWidget::resize_event(event);
}
void GlyphMapWidget::set_selected_glyph(int glyph)
{
if (m_selected_glyph == glyph)
return;
m_selected_glyph = glyph;
if (on_glyph_selected)
on_glyph_selected(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::reprobe_font()
{
VERIFY(m_font);
m_glyph_count = m_font->glyph_count();
m_selected_glyph = 0;
update();
}
void GlyphMapWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Frame::paint_event(event);
GUI::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());
for (int glyph = 0; 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 (glyph == m_selected_glyph) {
painter.fill_rect(outer_rect, is_focused() ? palette().selection() : palette().inactive_selection());
if (m_font->contains_glyph(glyph))
painter.draw_glyph(inner_rect.location(), glyph, is_focused() ? palette().selection_text() : palette().inactive_selection_text());
} else if (m_font->contains_glyph(glyph)) {
painter.fill_rect(outer_rect, palette().base());
painter.draw_glyph(inner_rect.location(), glyph, palette().base_text());
}
}
}
void GlyphMapWidget::mousedown_event(GUI::MouseEvent& event)
{
GUI::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) {
set_selected_glyph(glyph);
}
}
void GlyphMapWidget::keydown_event(GUI::KeyEvent& event)
{
GUI::Frame::keydown_event(event);
if (event.key() == KeyCode::Key_Up) {
if (selected_glyph() >= m_columns) {
set_selected_glyph(selected_glyph() - m_columns);
scroll_to_glyph(selected_glyph());
return;
}
}
if (event.key() == KeyCode::Key_Down) {
if (selected_glyph() < m_glyph_count - m_columns) {
set_selected_glyph(selected_glyph() + m_columns);
scroll_to_glyph(selected_glyph());
return;
}
}
if (event.key() == KeyCode::Key_Left) {
if (selected_glyph() > 0) {
set_selected_glyph(selected_glyph() - 1);
scroll_to_glyph(selected_glyph());
return;
}
}
if (event.key() == KeyCode::Key_Right) {
if (selected_glyph() < m_glyph_count - 1) {
set_selected_glyph(selected_glyph() + 1);
scroll_to_glyph(selected_glyph());
return;
}
}
if (event.ctrl() && event.key() == KeyCode::Key_Home) {
set_selected_glyph(0);
scroll_to_glyph(selected_glyph());
return;
}
if (event.ctrl() && event.key() == KeyCode::Key_End) {
set_selected_glyph(m_glyph_count - 1);
scroll_to_glyph(selected_glyph());
return;
}
if (!event.ctrl() && event.key() == KeyCode::Key_Home) {
set_selected_glyph(selected_glyph() / m_columns * m_columns);
return;
}
if (!event.ctrl() && event.key() == KeyCode::Key_End) {
int new_selection = selected_glyph() / m_columns * m_columns + (m_columns - 1);
int max = m_glyph_count - 1;
new_selection = clamp(new_selection, 0, max);
set_selected_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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