794 lines
26 KiB
Rust
794 lines
26 KiB
Rust
// Copyright (c) 2024 Sophie Herold
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// SPDX-License-Identifier: GPL-3.0-or-later
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use std::cell::{Cell, OnceCell};
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use std::marker::PhantomData;
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use adw::gtk::graphene;
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use adw::prelude::*;
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use adw::subclass::prelude::*;
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use adw::{glib, gtk};
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use super::crop::{LpAspectRatio, LpEditCrop, LpOrientation};
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const MIN_SELECTION_SIZE: f32 = 50.;
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#[derive(Debug, Clone, Copy)]
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struct InResize {
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corner: Corner,
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initial_selection: graphene::Rect,
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}
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#[derive(Debug, Clone, Copy)]
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struct InMove {
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initial_selection: graphene::Rect,
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}
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#[derive(Debug, Clone, Copy)]
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enum Corner {
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TopLeft,
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TopRight,
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BottomLeft,
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BottomRight,
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}
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#[derive(Debug, Clone, Copy)]
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enum HEdge {
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Left,
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Right,
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}
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#[derive(Debug, Clone, Copy)]
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enum VEdge {
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Top,
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Bottom,
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}
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impl Corner {
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fn cursor_name(&self) -> &str {
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match self {
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Self::TopLeft => "nw-resize",
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Self::TopRight => "ne-resize",
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Self::BottomLeft => "sw-resize",
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Self::BottomRight => "se-resize",
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}
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}
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fn h_edge(&self) -> HEdge {
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match self {
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Self::TopLeft => HEdge::Left,
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Self::TopRight => HEdge::Right,
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Self::BottomLeft => HEdge::Left,
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Self::BottomRight => HEdge::Right,
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}
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}
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fn v_edge(&self) -> VEdge {
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match self {
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Self::TopLeft => VEdge::Top,
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Self::TopRight => VEdge::Top,
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Self::BottomLeft => VEdge::Bottom,
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Self::BottomRight => VEdge::Bottom,
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}
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}
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}
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impl LpAspectRatio {
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fn frac(&self) -> Option<(u32, u32)> {
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match self {
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Self::Free => None,
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Self::Original => None,
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Self::Square => Some((1, 1)),
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Self::R5to4 => Some((5, 4)),
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Self::R4to3 => Some((4, 3)),
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Self::R3to2 => Some((3, 2)),
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Self::R16to10 => Some((16, 10)),
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Self::R16to9 => Some((16, 9)),
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}
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}
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fn num(&self, crop: &LpEditCrop) -> Option<f32> {
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let (x, y) = if matches!(self, Self::Original) {
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let width = crop.selection().total_width() as u32;
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let height = crop.selection().total_height() as u32;
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if width > height {
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(width, height)
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} else {
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(height, width)
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}
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} else {
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self.frac()?
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};
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let result = match crop.orientation() {
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LpOrientation::Landscape => x as f32 / y as f32,
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LpOrientation::Portrait => y as f32 / x as f32,
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};
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Some(result)
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}
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}
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trait RectExt: Into<graphene::Rect> {
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fn coordiantes(self) -> (f32, f32, f32, f32) {
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let rect: graphene::Rect = self.into();
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(rect.x(), rect.y(), rect.width(), rect.height())
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}
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}
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impl RectExt for graphene::Rect {}
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mod imp {
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use super::*;
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#[derive(Debug, Default, gtk::CompositeTemplate, glib::Properties)]
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#[properties(wrapper_type = super::LpEditCropSelection)]
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#[template(file = "crop_selection.ui")]
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pub struct LpEditCropSelection {
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#[template_child]
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pub(super) space_top_left: TemplateChild<adw::Bin>,
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#[template_child]
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pub(super) selection: TemplateChild<gtk::Grid>,
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#[template_child]
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handle_top_left: TemplateChild<adw::Bin>,
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#[template_child]
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handle_top_right: TemplateChild<adw::Bin>,
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#[template_child]
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handle_bottom_right: TemplateChild<adw::Bin>,
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#[template_child]
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handle_bottom_left: TemplateChild<adw::Bin>,
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#[template_child]
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selection_drag: TemplateChild<gtk::GestureDrag>,
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/// Set while in drag gesture for changing crop area
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selection_in_resize: Cell<Option<InResize>>,
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/// Set while in drag gesture for moving crop area
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selection_in_move: Cell<Option<InMove>>,
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// Animates changes between different fixed aspect ratios
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aspect_ratio_animation: OnceCell<adw::TimedAnimation>,
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#[property(get, construct_only)]
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crop: OnceCell<LpEditCrop>,
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#[property(get=Self::total_width, set=Self::set_total_width)]
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total_width: PhantomData<i32>,
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#[property(get=Self::total_height, set=Self::set_total_height)]
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total_height: PhantomData<i32>,
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pub(super) initialized: Cell<bool>,
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#[property(get, set=Self::set_crop_x)]
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crop_x: Cell<f32>,
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#[property(get, set=Self::set_crop_y)]
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crop_y: Cell<f32>,
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#[property(get, set=Self::set_crop_width)]
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crop_width: Cell<f32>,
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#[property(get, set=Self::set_crop_height)]
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crop_height: Cell<f32>,
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}
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#[glib::object_subclass]
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impl ObjectSubclass for LpEditCropSelection {
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const NAME: &'static str = "LpEditCropSelection";
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type Type = super::LpEditCropSelection;
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type ParentType = gtk::Grid;
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fn class_init(klass: &mut Self::Class) {
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Self::bind_template(klass);
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klass.set_css_name("lpcrop");
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}
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fn instance_init(obj: &glib::subclass::InitializingObject<Self>) {
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obj.init_template();
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}
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}
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#[glib::derived_properties]
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impl ObjectImpl for LpEditCropSelection {
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fn constructed(&self) {
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self.parent_constructed();
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let obj = self.obj();
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obj.set_direction(gtk::TextDirection::Ltr);
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// List of widgets that are drag handles
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let drag_corners = std::collections::BTreeMap::from([
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(self.handle_top_left.clone(), Corner::TopLeft),
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(self.handle_top_right.clone(), Corner::TopRight),
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(self.handle_bottom_left.clone(), Corner::BottomLeft),
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(self.handle_bottom_right.clone(), Corner::BottomRight),
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]);
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// Set cursor style for each corner
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for (handle_widget, corner) in drag_corners.iter() {
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handle_widget.set_cursor_from_name(Some(corner.cursor_name()));
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}
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self.selection.set_cursor_from_name(Some("move"));
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obj.crop()
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.connect_aspect_ratio_notify(|x| x.selection().imp().on_aspect_ratio_changed());
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obj.crop()
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.connect_orientation_notify(|x| x.selection().imp().on_aspect_ratio_changed());
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// Drag begin
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self.selection_drag.connect_drag_begin(glib::clone!(
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#[weak]
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obj,
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move |gesture, _, _| {
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let imp = obj.imp();
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imp.aspect_ratio_animation().pause();
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let hovered_widget = gesture
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.start_point()
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.and_then(|(x, y)| obj.pick(x, y, gtk::PickFlags::DEFAULT));
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// Lookup if the start-point of the gesture is above a drag handle widget and
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// what corner it is
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if let Some(corner) = hovered_widget
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.as_ref()
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.and_then(|x| drag_corners.get(x).copied())
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{
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gesture.set_state(gtk::EventSequenceState::Claimed);
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let crop_area = imp.crop_area();
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imp.selection_in_resize.set(Some(InResize {
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corner,
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initial_selection: crop_area,
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}));
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} else if hovered_widget.map_or(false, |x| x == *imp.selection) {
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gesture.set_state(gtk::EventSequenceState::Claimed);
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let crop_area = imp.crop_area();
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imp.selection_in_move.set(Some(InMove {
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initial_selection: crop_area,
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}));
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} else {
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gesture.set_state(gtk::EventSequenceState::Denied);
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return;
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}
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}
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));
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// Drag moved
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self.selection_drag.connect_drag_update(glib::clone!(
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#[weak]
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obj,
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move |_, x, y| {
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let imp = obj.imp();
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imp.aspect_ratio_animation().pause();
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if let Some(in_move) = imp.selection_in_move.get() {
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let moved_area = imp.moved_crop_area(&in_move, (x, y));
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imp.set_crop(moved_area);
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} else if let Some(drag) = imp.selection_in_resize.get() {
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let coord = (x, y);
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let new_area = if let Some(aspect_ratio) = imp.aspect_ratio() {
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let u =
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imp.new_crop_area_aspect_ratio(&drag, true, coord, aspect_ratio);
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let v =
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imp.new_crop_area_aspect_ratio(&drag, false, coord, aspect_ratio);
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if u.area() > v.area() {
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u
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} else {
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v
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}
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} else {
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imp.new_crop_area_aspect_free(&drag, coord)
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};
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imp.set_crop(new_area);
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}
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}
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));
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// Drag finished
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self.selection_drag.connect_drag_end(glib::clone!(
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#[weak]
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obj,
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move |_, _, _| {
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obj.imp().selection_in_resize.set(None);
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obj.imp().selection_in_move.set(None);
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}
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));
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}
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}
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impl WidgetImpl for LpEditCropSelection {}
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impl GridImpl for LpEditCropSelection {}
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impl LpEditCropSelection {
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/// Current crop area
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fn crop_area(&self) -> graphene::Rect {
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graphene::Rect::new(
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self.space_top_left.width_request() as f32,
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self.space_top_left.height_request() as f32,
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self.selection.width_request() as f32,
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self.selection.height_request() as f32,
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)
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}
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fn new_crop_area(&self, resize: &InResize, (x, y): (f64, f64)) -> graphene::Rect {
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let (x_offset, width_offset) = match resize.corner.h_edge() {
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// Change the crop x position and reduce width accordingly
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HEdge::Left => (x, -x),
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// Just change the crop width
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HEdge::Right => (0., x),
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};
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let (y_offset, height_offset) = match resize.corner.v_edge() {
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VEdge::Top => (y, -y),
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VEdge::Bottom => (0., y),
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};
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let mut x = resize.initial_selection.x() + x_offset as f32;
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let mut y = resize.initial_selection.y() + y_offset as f32;
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let mut width = resize.initial_selection.width() + width_offset as f32;
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let mut height = resize.initial_selection.height() + height_offset as f32;
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if width < 0. {
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if matches!(resize.corner.h_edge(), HEdge::Left) {
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x += width;
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}
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width = 0.;
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}
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if height < 0. {
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if matches!(resize.corner.v_edge(), VEdge::Top) {
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y += height;
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}
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height = 0.;
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}
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graphene::Rect::new(x, y, width, height)
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}
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fn moved_crop_area(
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&self,
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shift: &InMove,
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(x_shift, y_shift): (f64, f64),
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) -> graphene::Rect {
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let obj = self.obj();
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let (mut x, mut y, width, height) = shift.initial_selection.coordiantes();
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x += x_shift as f32;
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y += y_shift as f32;
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if x < 0. {
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x = 0.;
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}
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if y < 0. {
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y = 0.;
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}
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if x + width > obj.width_request() as f32 {
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x = obj.width_request() as f32 - width;
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}
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if y + height > obj.height_request() as f32 {
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y = obj.height_request() as f32 - height;
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}
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graphene::Rect::new(x, y, width, height)
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}
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fn new_crop_area_aspect_free(
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&self,
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resize: &InResize,
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(x, y): (f64, f64),
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) -> graphene::Rect {
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let obj = self.obj();
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let (mut x, mut y, mut width, mut height) =
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self.new_crop_area(resize, (x, y)).coordiantes();
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if width < MIN_SELECTION_SIZE {
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let x_diff = width - MIN_SELECTION_SIZE;
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width = MIN_SELECTION_SIZE;
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if matches!(resize.corner.h_edge(), HEdge::Left) {
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x += x_diff;
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}
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}
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if height < MIN_SELECTION_SIZE {
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let y_diff = height - MIN_SELECTION_SIZE;
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height = MIN_SELECTION_SIZE;
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if matches!(resize.corner.v_edge(), VEdge::Top) {
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y += y_diff;
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}
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}
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if x < 0. {
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width += x;
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x = 0.;
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}
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if y < 0. {
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height += y;
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y = 0.;
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}
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if x + width > obj.width_request() as f32 {
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width = obj.width_request() as f32 - x;
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}
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if y + height > obj.height_request() as f32 {
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height = obj.height_request() as f32 - y;
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}
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graphene::Rect::new(x, y, width, height)
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}
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fn new_crop_area_aspect_ratio(
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&self,
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resize: &InResize,
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vertical: bool,
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(x, y): (f64, f64),
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aspect_ratio: f32,
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) -> graphene::Rect {
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let new_area = self.new_crop_area(resize, (x, y));
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let (mut x, mut y, mut width, mut height) = new_area.coordiantes();
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if vertical {
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width = new_area.height() * aspect_ratio;
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if matches!(resize.corner.h_edge(), HEdge::Left) {
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x += new_area.width() - width;
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}
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} else {
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height = new_area.width() / aspect_ratio;
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if matches!(resize.corner.v_edge(), VEdge::Top) {
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y += new_area.height() - height;
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}
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}
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let mut rect = graphene::Rect::new(x, y, width, height);
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self.rect_limit_top(&mut rect, aspect_ratio, resize.corner.v_edge());
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self.rect_limit_left(&mut rect, aspect_ratio, resize.corner.h_edge());
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self.rect_limit_bottom(&mut rect, aspect_ratio, resize.corner.h_edge());
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self.rect_limit_right(&mut rect, aspect_ratio, resize.corner.v_edge());
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self.rect_limit_minumum_size(&mut rect, aspect_ratio, resize.corner);
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(x, y, width, height) = rect.coordiantes();
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graphene::Rect::new(x, y, width, height)
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}
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/// Ensure selection is not smaller than minimum size
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fn rect_limit_minumum_size(
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&self,
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rect: &mut graphene::Rect,
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aspect_ratio: f32,
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corner: Corner,
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) {
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let (mut x, mut y, mut width, mut height) = rect.coordiantes();
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if width < MIN_SELECTION_SIZE {
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let x_diff = width - MIN_SELECTION_SIZE;
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width = MIN_SELECTION_SIZE;
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let y_diff = height - MIN_SELECTION_SIZE / aspect_ratio;
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height = MIN_SELECTION_SIZE / aspect_ratio;
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if matches!(corner.v_edge(), VEdge::Top) {
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y += y_diff;
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}
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if matches!(corner.h_edge(), HEdge::Left) {
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x += x_diff;
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}
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}
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if height < MIN_SELECTION_SIZE {
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let x_diff = width - MIN_SELECTION_SIZE * aspect_ratio;
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width = MIN_SELECTION_SIZE * aspect_ratio;
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let y_diff = height - MIN_SELECTION_SIZE;
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height = MIN_SELECTION_SIZE;
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if matches!(corner.v_edge(), VEdge::Top) {
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y += y_diff;
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}
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if matches!(corner.h_edge(), HEdge::Left) {
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x += x_diff;
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}
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}
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*rect = graphene::Rect::new(x, y, width, height);
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}
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/// Make sure Rect is inside image area by moving it if necessary
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fn rect_make_contained(&self, rect: &mut graphene::Rect) {
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let (mut x, mut y, width, height) = rect.coordiantes();
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if x + width > self.total_width() as f32 {
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x = self.total_width() as f32 - width;
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}
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|
|
if y + height > self.total_height() as f32 {
|
|
y = self.total_height() as f32 - height;
|
|
}
|
|
|
|
*rect = graphene::Rect::new(x, y, width, height);
|
|
}
|
|
|
|
/// Limit Rect to not leave image area to the left
|
|
fn rect_limit_top(&self, rect: &mut graphene::Rect, aspect_ratio: f32, edge: VEdge) {
|
|
let (mut x, mut y, mut width, mut height) = rect.coordiantes();
|
|
|
|
if x < 0. {
|
|
width += x;
|
|
x = 0.;
|
|
let old_height = height;
|
|
height = width / aspect_ratio;
|
|
if matches!(edge, VEdge::Top) {
|
|
y += old_height - height;
|
|
}
|
|
}
|
|
|
|
*rect = graphene::Rect::new(x, y, width, height);
|
|
}
|
|
|
|
/// Limit Rect to not leave image area at to the left
|
|
fn rect_limit_left(&self, rect: &mut graphene::Rect, aspect_ratio: f32, edge: HEdge) {
|
|
let (mut x, mut y, mut width, mut height) = rect.coordiantes();
|
|
|
|
if y < 0. {
|
|
height += y;
|
|
y = 0.;
|
|
let old_width = width;
|
|
width = height * aspect_ratio;
|
|
|
|
if matches!(edge, HEdge::Left) {
|
|
x += old_width - width;
|
|
}
|
|
|
|
*rect = graphene::Rect::new(x, y, width, height);
|
|
}
|
|
}
|
|
|
|
/// Limit Rect to not leave image area at the bottom
|
|
fn rect_limit_bottom(&self, rect: &mut graphene::Rect, aspect_ratio: f32, edge: HEdge) {
|
|
let obj = self.obj();
|
|
let (mut x, y, mut width, mut height) = rect.coordiantes();
|
|
|
|
if y + height > obj.height_request() as f32 {
|
|
let overshoot = y + height - obj.height_request() as f32;
|
|
|
|
height -= overshoot;
|
|
let old_width = width;
|
|
width = height * aspect_ratio;
|
|
|
|
if matches!(edge, HEdge::Left) {
|
|
x += old_width - width;
|
|
}
|
|
|
|
*rect = graphene::Rect::new(x, y, width, height);
|
|
}
|
|
}
|
|
|
|
fn rect_limit_right(&self, rect: &mut graphene::Rect, aspect_ratio: f32, edge: VEdge) {
|
|
let obj = self.obj();
|
|
let (x, mut y, mut width, mut height) = rect.coordiantes();
|
|
|
|
if x + width > obj.width_request() as f32 {
|
|
let overshoot = x + width - obj.width_request() as f32;
|
|
|
|
width -= overshoot;
|
|
let old_height = height;
|
|
height = width / aspect_ratio;
|
|
|
|
if matches!(edge, VEdge::Top) {
|
|
y += old_height - height;
|
|
}
|
|
|
|
*rect = graphene::Rect::new(x, y, width, height);
|
|
}
|
|
}
|
|
|
|
fn on_aspect_ratio_changed(&self) {
|
|
let Some(aspect_ratio) = self.aspect_ratio() else {
|
|
return;
|
|
};
|
|
|
|
let obj = self.obj();
|
|
|
|
// Store current state as reference for animation
|
|
let current_area = self.crop_area();
|
|
let (_, y, _, height) = current_area.coordiantes();
|
|
|
|
let width = current_area.height() * aspect_ratio;
|
|
let x = f32::max(0., current_area.x() + (current_area.width() - width) / 2.);
|
|
|
|
let mut new_area = graphene::Rect::new(x, y, width, height);
|
|
|
|
self.rect_limit_top(&mut new_area, aspect_ratio, VEdge::Bottom);
|
|
self.rect_limit_left(&mut new_area, aspect_ratio, HEdge::Right);
|
|
self.rect_limit_bottom(&mut new_area, aspect_ratio, HEdge::Left);
|
|
self.rect_limit_right(&mut new_area, aspect_ratio, VEdge::Top);
|
|
|
|
self.rect_limit_minumum_size(&mut new_area, aspect_ratio, Corner::BottomLeft);
|
|
|
|
self.rect_make_contained(&mut new_area);
|
|
|
|
self.aspect_ratio_animation()
|
|
.set_target(&adw::CallbackAnimationTarget::new(glib::clone!(
|
|
#[weak]
|
|
obj,
|
|
move |progress| {
|
|
let imp = obj.imp();
|
|
|
|
// Linear interpolate between old and target value
|
|
imp.set_crop(current_area.interpolate(&new_area, progress));
|
|
}
|
|
)));
|
|
|
|
self.aspect_ratio_animation().play();
|
|
}
|
|
|
|
/// Fixed aspect ratio of selection if set
|
|
fn aspect_ratio(&self) -> Option<f32> {
|
|
let crop = self.obj().crop();
|
|
crop.aspect_ratio().num(&crop)
|
|
}
|
|
|
|
/// Set all coordinates of crop selection
|
|
fn set_crop(&self, rect: graphene::Rect) {
|
|
let rect = rect.round_extents();
|
|
|
|
self.set_crop_x(rect.x());
|
|
self.set_crop_y(rect.y());
|
|
self.set_crop_width(rect.width());
|
|
self.set_crop_height(rect.height());
|
|
}
|
|
|
|
/// Set x coordinate of crop selection rectangle origin
|
|
pub(super) fn set_crop_x(&self, x: f32) {
|
|
if x < 0. {
|
|
eprintln!("Tried to set x coordinate to {x}");
|
|
return;
|
|
}
|
|
|
|
self.crop_x.set(x);
|
|
self.space_top_left.set_width_request(x.round() as i32);
|
|
}
|
|
|
|
/// Set y coordinate of crop selection rectangle origin
|
|
pub(super) fn set_crop_y(&self, y: f32) {
|
|
if y < 0. {
|
|
eprintln!("Tried to set y coordinate to {y}");
|
|
return;
|
|
}
|
|
|
|
self.crop_y.set(y);
|
|
self.space_top_left.set_height_request(y.round() as i32);
|
|
}
|
|
|
|
/// Set width of crop selection rectangle
|
|
pub(super) fn set_crop_width(&self, width: f32) {
|
|
if width < 0. {
|
|
eprintln!("Tried to set width to {width}");
|
|
return;
|
|
}
|
|
|
|
self.crop_width.set(width);
|
|
self.selection.set_width_request(width.round() as i32);
|
|
}
|
|
|
|
/// Set height of crop selection rectangle
|
|
pub(super) fn set_crop_height(&self, height: f32) {
|
|
if height < 0. {
|
|
eprintln!("Tried to set height to {height}");
|
|
return;
|
|
}
|
|
|
|
self.crop_height.set(height);
|
|
self.selection.set_height_request(height.round() as i32);
|
|
}
|
|
|
|
/// Width of area in which the crop selection can exist
|
|
fn total_width(&self) -> i32 {
|
|
self.obj().width_request()
|
|
}
|
|
|
|
fn set_total_width(&self, width: i32) {
|
|
self.obj().set_width_request(width);
|
|
}
|
|
|
|
/// Height of area in which the crop selection can exist
|
|
fn total_height(&self) -> i32 {
|
|
self.obj().height_request()
|
|
}
|
|
|
|
fn set_total_height(&self, width: i32) {
|
|
self.obj().set_height_request(width);
|
|
}
|
|
|
|
fn aspect_ratio_animation(&self) -> &adw::TimedAnimation {
|
|
self.aspect_ratio_animation.get_or_init(|| {
|
|
adw::TimedAnimation::builder()
|
|
.duration(200)
|
|
.value_from(0.)
|
|
.value_to(1.)
|
|
.easing(adw::Easing::EaseOutSine)
|
|
.widget(&*self.obj())
|
|
.target(&adw::CallbackAnimationTarget::new(|_| {}))
|
|
.build()
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
glib::wrapper! {
|
|
pub struct LpEditCropSelection(ObjectSubclass<imp::LpEditCropSelection>)
|
|
@extends gtk::Widget;
|
|
}
|
|
|
|
impl LpEditCropSelection {
|
|
pub fn new() -> Self {
|
|
glib::Object::new()
|
|
}
|
|
|
|
pub fn ensure_initialized(&self, x: f64, y: f64, width: f64, height: f64) {
|
|
let imp = self.imp();
|
|
|
|
if imp.initialized.get() {
|
|
return;
|
|
}
|
|
|
|
imp.initialized.set(true);
|
|
|
|
self.set_margin_start(x as i32);
|
|
self.set_margin_top(y as i32);
|
|
self.set_total_width(width as i32);
|
|
self.set_total_height(height as i32);
|
|
|
|
imp.set_crop_x(0.);
|
|
imp.set_crop_y(0.);
|
|
imp.set_crop_width(width as f32);
|
|
imp.set_crop_height(height as f32);
|
|
}
|
|
|
|
pub fn set_size(&self, x: f64, y: f64, width: f64, height: f64) {
|
|
let ratio = width as f32 / self.total_width() as f32;
|
|
|
|
self.set_crop_x(self.crop_x() * ratio);
|
|
self.set_crop_y(self.crop_y() * ratio);
|
|
self.set_crop_width(self.crop_width() * ratio);
|
|
self.set_crop_height(self.crop_height() * ratio);
|
|
|
|
self.set_margin_start(x as i32);
|
|
self.set_margin_top(y as i32);
|
|
self.set_total_width(width as i32);
|
|
self.set_total_height(height as i32);
|
|
}
|
|
}
|