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ladybird/DevTools/VisualBuilder/VBForm.cpp
Andreas Kling 94ca55cefd Meta: Add license header to source files 
As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.

For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.

Going forward, all new source files should include a license header.
2020-01-18 09:45:54 +01:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "VBForm.h"
#include "VBProperty.h"
#include "VBWidget.h"
#include "VBWidgetRegistry.h"
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/StringBuilder.h>
#include <LibCore/CFile.h>
#include <LibDraw/PNGLoader.h>
#include <LibGUI/GAction.h>
#include <LibGUI/GBoxLayout.h>
#include <LibGUI/GMenu.h>
#include <LibGUI/GMessageBox.h>
#include <LibGUI/GPainter.h>
static VBForm* s_current;
VBForm* VBForm::current()
{
return s_current;
}
VBForm::VBForm(const String& name, GWidget* parent)
: GWidget(parent)
, m_name(name)
{
s_current = this;
set_fill_with_background_color(true);
set_greedy_for_hits(true);
m_context_menu = GMenu::construct();
m_context_menu->add_action(GCommonActions::make_move_to_front_action([this](auto&) {
if (auto* widget = single_selected_widget())
widget->gwidget()->move_to_front();
}));
m_context_menu->add_action(GCommonActions::make_move_to_back_action([this](auto&) {
if (auto* widget = single_selected_widget())
widget->gwidget()->move_to_back();
}));
m_context_menu->add_separator();
m_context_menu->add_action(GAction::create("Lay out horizontally", load_png("/res/icons/16x16/layout-horizontally.png"), [this](auto&) {
if (auto* widget = single_selected_widget()) {
dbg() << "Giving " << *widget->gwidget() << " a horizontal box layout";
widget->gwidget()->set_layout(make<GBoxLayout>(Orientation::Horizontal));
}
}));
m_context_menu->add_action(GAction::create("Lay out vertically", load_png("/res/icons/16x16/layout-vertically.png"), [this](auto&) {
if (auto* widget = single_selected_widget()) {
dbg() << "Giving " << *widget->gwidget() << " a vertical box layout";
widget->gwidget()->set_layout(make<GBoxLayout>(Orientation::Vertical));
}
}));
m_context_menu->add_separator();
m_context_menu->add_action(GCommonActions::make_delete_action([this](auto&) {
delete_selected_widgets();
}));
}
void VBForm::context_menu_event(GContextMenuEvent& event)
{
m_context_menu->popup(event.screen_position());
}
void VBForm::insert_widget(VBWidgetType type)
{
auto* insertion_parent = single_selected_widget();
auto widget = VBWidget::create(type, *this, insertion_parent);
Point insertion_position = m_next_insertion_position;
if (insertion_parent)
insertion_position.move_by(insertion_parent->gwidget()->window_relative_rect().location());
widget->set_rect({ insertion_position, { m_grid_size * 10 + 1, m_grid_size * 5 + 1 } });
m_next_insertion_position.move_by(m_grid_size, m_grid_size);
m_widgets.append(move(widget));
}
VBForm::~VBForm()
{
}
void VBForm::paint_event(GPaintEvent& event)
{
GPainter painter(*this);
painter.add_clip_rect(event.rect());
for (int y = 0; y < height(); y += m_grid_size) {
for (int x = 0; x < width(); x += m_grid_size) {
painter.set_pixel({ x, y }, Color::from_rgb(0x404040));
}
}
}
void VBForm::second_paint_event(GPaintEvent& event)
{
GPainter painter(*this);
painter.add_clip_rect(event.rect());
for (auto& widget : m_widgets) {
if (widget.is_selected()) {
for_each_direction([&](auto direction) {
bool in_layout = widget.is_in_layout();
auto grabber_rect = widget.grabber_rect(direction);
painter.fill_rect(grabber_rect, in_layout ? Color::White : Color::Black);
if (in_layout)
painter.draw_rect(grabber_rect, Color::Black);
});
}
}
}
bool VBForm::is_selected(const VBWidget& widget) const
{
// FIXME: Fix HashTable and remove this const_cast.
return m_selected_widgets.contains(const_cast<VBWidget*>(&widget));
}
VBWidget* VBForm::widget_at(const Point& position)
{
auto result = hit_test(position, GWidget::ShouldRespectGreediness::No);
if (!result.widget)
return nullptr;
auto* gwidget = result.widget;
while (gwidget) {
if (auto* widget = m_gwidget_map.get(gwidget).value_or(nullptr))
return widget;
gwidget = gwidget->parent_widget();
}
return nullptr;
}
void VBForm::grabber_mousedown_event(GMouseEvent& event, Direction grabber)
{
m_transform_event_origin = event.position();
for_each_selected_widget([](auto& widget) { widget.capture_transform_origin_rect(); });
m_resize_direction = grabber;
}
void VBForm::keydown_event(GKeyEvent& event)
{
if (event.key() == KeyCode::Key_Delete) {
delete_selected_widgets();
return;
}
if (event.key() == KeyCode::Key_Tab) {
if (m_widgets.is_empty())
return;
if (m_selected_widgets.is_empty()) {
set_single_selected_widget(&m_widgets.first());
update();
return;
}
int selected_widget_index = 0;
for (; selected_widget_index < m_widgets.size(); ++selected_widget_index) {
if (&m_widgets[selected_widget_index] == *m_selected_widgets.begin())
break;
}
++selected_widget_index;
if (selected_widget_index == m_widgets.size())
selected_widget_index = 0;
set_single_selected_widget(&m_widgets[selected_widget_index]);
update();
return;
}
if (!m_selected_widgets.is_empty()) {
switch (event.key()) {
case KeyCode::Key_Up:
update();
for_each_selected_widget([this](auto& widget) {
if (widget.is_in_layout())
return;
widget.gwidget()->move_by(0, -m_grid_size);
});
break;
case KeyCode::Key_Down:
update();
for_each_selected_widget([this](auto& widget) {
if (widget.is_in_layout())
return;
widget.gwidget()->move_by(0, m_grid_size);
});
break;
case KeyCode::Key_Left:
update();
for_each_selected_widget([this](auto& widget) {
if (widget.is_in_layout())
return;
widget.gwidget()->move_by(-m_grid_size, 0);
});
break;
case KeyCode::Key_Right:
update();
for_each_selected_widget([this](auto& widget) {
if (widget.is_in_layout())
return;
widget.gwidget()->move_by(m_grid_size, 0);
});
break;
}
return;
}
}
void VBForm::set_single_selected_widget(VBWidget* widget)
{
if (!widget) {
if (!m_selected_widgets.is_empty()) {
m_selected_widgets.clear();
on_widget_selected(nullptr);
update();
}
return;
}
m_selected_widgets.clear();
m_selected_widgets.set(widget);
on_widget_selected(m_selected_widgets.size() == 1 ? widget : nullptr);
update();
}
void VBForm::add_to_selection(VBWidget& widget)
{
m_selected_widgets.set(&widget);
update();
}
void VBForm::remove_from_selection(VBWidget& widget)
{
m_selected_widgets.remove(&widget);
update();
}
void VBForm::mousedown_event(GMouseEvent& event)
{
if (m_resize_direction == Direction::None) {
bool hit_grabber = false;
for_each_selected_widget([&](auto& widget) {
if (widget.is_in_layout())
return;
auto grabber = widget.grabber_at(event.position());
if (grabber != Direction::None) {
hit_grabber = true;
return grabber_mousedown_event(event, grabber);
}
});
if (hit_grabber)
return;
}
auto* widget = widget_at(event.position());
if (!widget) {
set_single_selected_widget(nullptr);
return;
}
if (event.button() == GMouseButton::Left || event.button() == GMouseButton::Right) {
m_transform_event_origin = event.position();
if (event.modifiers() == Mod_Ctrl)
remove_from_selection(*widget);
else if (event.modifiers() == Mod_Shift)
add_to_selection(*widget);
else if (!m_selected_widgets.contains(widget))
set_single_selected_widget(widget);
for_each_selected_widget([](auto& widget) { widget.capture_transform_origin_rect(); });
on_widget_selected(single_selected_widget());
}
}
void VBForm::mousemove_event(GMouseEvent& event)
{
if (event.buttons() & GMouseButton::Left) {
if (m_resize_direction == Direction::None) {
update();
auto delta = event.position() - m_transform_event_origin;
for_each_selected_widget([&](auto& widget) {
if (widget.is_in_layout())
return;
auto new_rect = widget.transform_origin_rect().translated(delta);
new_rect.set_x(new_rect.x() - (new_rect.x() % m_grid_size));
new_rect.set_y(new_rect.y() - (new_rect.y() % m_grid_size));
widget.set_rect(new_rect);
});
return;
}
int diff_x = event.x() - m_transform_event_origin.x();
int diff_y = event.y() - m_transform_event_origin.y();
int change_x = 0;
int change_y = 0;
int change_w = 0;
int change_h = 0;
switch (m_resize_direction) {
case Direction::DownRight:
change_w = diff_x;
change_h = diff_y;
break;
case Direction::Right:
change_w = diff_x;
break;
case Direction::UpRight:
change_w = diff_x;
change_y = diff_y;
change_h = -diff_y;
break;
case Direction::Up:
change_y = diff_y;
change_h = -diff_y;
break;
case Direction::UpLeft:
change_x = diff_x;
change_w = -diff_x;
change_y = diff_y;
change_h = -diff_y;
break;
case Direction::Left:
change_x = diff_x;
change_w = -diff_x;
break;
case Direction::DownLeft:
change_x = diff_x;
change_w = -diff_x;
change_h = diff_y;
break;
case Direction::Down:
change_h = diff_y;
break;
default:
ASSERT_NOT_REACHED();
}
update();
for_each_selected_widget([&](auto& widget) {
if (widget.is_in_layout())
return;
auto new_rect = widget.transform_origin_rect();
Size minimum_size { 5, 5 };
new_rect.set_x(new_rect.x() + change_x);
new_rect.set_y(new_rect.y() + change_y);
new_rect.set_width(max(minimum_size.width(), new_rect.width() + change_w));
new_rect.set_height(max(minimum_size.height(), new_rect.height() + change_h));
new_rect.set_x(new_rect.x() - (new_rect.x() % m_grid_size));
new_rect.set_y(new_rect.y() - (new_rect.y() % m_grid_size));
new_rect.set_width(new_rect.width() - (new_rect.width() % m_grid_size) + 1);
new_rect.set_height(new_rect.height() - (new_rect.height() % m_grid_size) + 1);
widget.set_rect(new_rect);
});
set_cursor_type_from_grabber(m_resize_direction);
} else {
for (auto& widget : m_selected_widgets) {
if (widget->is_in_layout())
continue;
auto grabber_at = widget->grabber_at(event.position());
set_cursor_type_from_grabber(grabber_at);
if (grabber_at != Direction::None)
break;
}
}
}
void VBForm::load_from_file(const String& path)
{
auto file = CFile::construct(path);
if (!file->open(CIODevice::ReadOnly)) {
GMessageBox::show(String::format("Could not open '%s' for reading", path.characters()), "Error", GMessageBox::Type::Error, GMessageBox::InputType::OK, window());
return;
}
auto file_contents = file->read_all();
auto form_json = JsonValue::from_string(file_contents);
if (!form_json.is_object()) {
GMessageBox::show(String::format("Could not parse '%s'", path.characters()), "Error", GMessageBox::Type::Error, GMessageBox::InputType::OK, window());
return;
}
m_name = form_json.as_object().get("name").to_string();
auto widgets = form_json.as_object().get("widgets").as_array();
widgets.for_each([&](const JsonValue& widget_value) {
auto& widget_object = widget_value.as_object();
auto widget_class = widget_object.get("class").as_string();
auto widget_type = widget_type_from_class_name(widget_class);
// FIXME: Construct VBWidget within the right parent..
auto vbwidget = VBWidget::create(widget_type, *this, nullptr);
widget_object.for_each_member([&](auto& property_name, const JsonValue& property_value) {
(void)property_name;
(void)property_value;
VBProperty& property = vbwidget->property(property_name);
dbgprintf("Set property %s.%s to '%s'\n", widget_class.characters(), property_name.characters(), property_value.to_string().characters());
property.set_value(property_value);
});
m_widgets.append(vbwidget);
});
}
void VBForm::write_to_file(const String& path)
{
auto file = CFile::construct(path);
if (!file->open(CIODevice::WriteOnly)) {
GMessageBox::show(String::format("Could not open '%s' for writing", path.characters()), "Error", GMessageBox::Type::Error, GMessageBox::InputType::OK, window());
return;
}
JsonObject form_object;
form_object.set("name", m_name);
JsonArray widget_array;
for (auto& widget : m_widgets) {
JsonObject widget_object;
widget.for_each_property([&](auto& property) {
if (property.value().is_bool())
widget_object.set(property.name(), property.value().to_bool());
else if (property.value().is_int())
widget_object.set(property.name(), property.value().to_int());
else
widget_object.set(property.name(), property.value().to_string());
});
widget_array.append(widget_object);
}
form_object.set("widgets", widget_array);
file->write(form_object.to_string());
}
void VBForm::dump()
{
dbgprintf("[Form]\n");
dbgprintf("Name=%s\n", m_name.characters());
dbgprintf("\n");
int i = 0;
for (auto& widget : m_widgets) {
dbgprintf("[Widget %d]\n", i++);
widget.for_each_property([](auto& property) {
dbgprintf("%s=%s\n", property.name().characters(), property.value().to_string().characters());
});
dbgprintf("\n");
}
}
void VBForm::mouseup_event(GMouseEvent& event)
{
if (event.button() == GMouseButton::Left) {
m_transform_event_origin = {};
m_resize_direction = Direction::None;
}
}
void VBForm::delete_selected_widgets()
{
Vector<VBWidget*> to_delete;
for_each_selected_widget([&](auto& widget) {
to_delete.append(&widget);
});
if (to_delete.is_empty())
return;
for (auto& widget : to_delete)
m_widgets.remove_first_matching([&widget](auto& entry) { return entry == widget; });
on_widget_selected(single_selected_widget());
update();
}
template<typename Callback>
void VBForm::for_each_selected_widget(Callback callback)
{
for (auto& widget : m_selected_widgets)
callback(*widget);
}
void VBForm::set_cursor_type_from_grabber(Direction grabber)
{
if (grabber == m_mouse_direction_type)
return;
switch (grabber) {
case Direction::Up:
case Direction::Down:
window()->set_override_cursor(GStandardCursor::ResizeVertical);
break;
case Direction::Left:
case Direction::Right:
window()->set_override_cursor(GStandardCursor::ResizeHorizontal);
break;
case Direction::UpLeft:
case Direction::DownRight:
window()->set_override_cursor(GStandardCursor::ResizeDiagonalTLBR);
break;
case Direction::UpRight:
case Direction::DownLeft:
window()->set_override_cursor(GStandardCursor::ResizeDiagonalBLTR);
break;
case Direction::None:
window()->set_override_cursor(GStandardCursor::None);
break;
}
m_mouse_direction_type = grabber;
}
VBWidget* VBForm::single_selected_widget()
{
if (m_selected_widgets.size() != 1)
return nullptr;
return *m_selected_widgets.begin();
}
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