move layout code to layout

This commit is contained in:
Johannes Heuel
2022-08-23 17:50:18 +02:00
parent 43d0566db9
commit 1ed0f5f95b
7 changed files with 205 additions and 158 deletions

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@@ -12,7 +12,7 @@ wasm-bindgen-futures = "0.4.32"
gloo-net = "0.2.3"
weblog = "0.3.0"
wee_alloc = "0.4.5"
ybc = "0.2"
ybc = { git = "https://github.com/jheuel/ybc", branch = "yew-0-19-update" }
yew = "0.19"
yew-hooks = "0.1.56"
pathfinding = "3.0.13"

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@@ -6,6 +6,8 @@ use yew::prelude::*;
use yew::{function_component, html};
use super::layout::*;
#[derive(Clone, Debug, Properties, PartialEq)]
pub struct GridProps {
#[prop_or_default]
@@ -14,95 +16,6 @@ pub struct GridProps {
pub width: u32,
}
fn get_common_height(row: &[OutputPicture], container_width: u32, margin: u32) -> f32 {
let row_width: u32 = container_width - row.len() as u32 * (margin * 2);
let total_aspect_ratio: f32 = row
.iter()
.map(|p| (p.width as f32) / (p.height as f32))
.sum();
row_width as f32 / total_aspect_ratio
}
fn cost(
photos: &[OutputPicture],
i: usize,
j: usize,
width: u32,
target_height: u32,
margin: u32,
) -> u32 {
let common_height = get_common_height(&photos[i..j], width, margin);
(common_height - target_height as f32).powi(2) as u32
}
fn make_successors(
target_height: u32,
container_width: u32,
photos: &Vec<OutputPicture>,
limit_node_search: usize,
margin: u32,
) -> Vec<Vec<(usize, u32)>> {
let mut results = vec![Vec::new(); photos.len()];
(0..photos.len()).for_each(|start| {
for j in start + 1..photos.len() + 1 {
if j - start > limit_node_search {
break;
}
results[start].push((
j,
cost(photos, start, j, container_width, target_height, margin),
));
}
});
results
}
// guesstimate how many neighboring nodes should be searched based on
// the aspect ratio of the container with images having an avg AR of 1.5
// as the minimum amount of photos per row, plus some nodes
fn find_ideal_node_search(target_row_height: u32, container_width: u32) -> usize {
let row_aspect_ratio = container_width as f32 / target_row_height as f32;
(row_aspect_ratio / 1.5) as usize + 8
}
fn compute_row_layout(
container_width: u32,
limit_node_search: usize,
target_height: u32,
margin: u32,
photos: &Vec<OutputPicture>,
) -> Option<Vec<(u32, u32)>> {
console_log!("compute row layout for width: {}", container_width);
if photos.is_empty() {
return None;
}
let successors = make_successors(
target_height,
container_width,
photos,
limit_node_search,
margin,
);
let path = dijkstra(&0, |p| successors[*p].clone(), |p| *p == photos.len());
let (path, _cost) = if let Some(p) = path {
p
} else {
(Vec::new(), 0)
};
let mut dimensions: Vec<(u32, u32)> = Vec::with_capacity(photos.len());
for i in 1..path.len() {
let row = &photos[path[i - 1]..path[i]];
let height = get_common_height(row, container_width, margin) as u32;
(path[i - 1]..path[i]).for_each(|j| {
let ratio = photos[j].width as f32 / photos[j].height as f32;
dimensions.push(((height as f32 * ratio) as u32, height));
});
}
Some(dimensions)
}
#[function_component(Grid)]
pub fn grid(props: &GridProps) -> Html {
let target_height = 300;
@@ -127,7 +40,6 @@ pub fn grid(props: &GridProps) -> Html {
"display: flex;",
"flex-wrap: wrap;",
"flex-direction: row;",
"border: 1px solid black;",
)}>
{ props.pictures.iter().zip(dimensions).map(|(p, d)|
html!{<Picture margin={margin} picture={p.clone()} width={d.0} height={d.1} />}

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@@ -0,0 +1,90 @@
use common::OutputPicture;
use pathfinding::prelude::dijkstra;
use weblog::console_log;
pub fn get_common_height(row: &[OutputPicture], container_width: u32, margin: u32) -> f32 {
let row_width: u32 = container_width - row.len() as u32 * (margin * 2);
let total_aspect_ratio: f32 = row
.iter()
.map(|p| (p.width as f32) / (p.height as f32))
.sum();
row_width as f32 / total_aspect_ratio
}
pub fn cost(
photos: &[OutputPicture],
i: usize,
j: usize,
width: u32,
target_height: u32,
margin: u32,
) -> u32 {
let common_height = get_common_height(&photos[i..j], width, margin);
(common_height - target_height as f32).powi(2) as u32
}
pub fn make_successors(
target_height: u32,
container_width: u32,
photos: &Vec<OutputPicture>,
limit_node_search: usize,
margin: u32,
) -> Vec<Vec<(usize, u32)>> {
let mut results = vec![Vec::new(); photos.len()];
(0..photos.len()).for_each(|start| {
for j in start + 1..photos.len() + 1 {
if j - start > limit_node_search {
break;
}
results[start].push((
j,
cost(photos, start, j, container_width, target_height, margin),
));
}
});
results
}
pub fn find_ideal_node_search(target_row_height: u32, container_width: u32) -> usize {
let row_aspect_ratio = container_width as f32 / target_row_height as f32;
(row_aspect_ratio / 1.5) as usize + 8
}
pub fn compute_row_layout(
container_width: u32,
limit_node_search: usize,
target_height: u32,
margin: u32,
photos: &Vec<OutputPicture>,
) -> Option<Vec<(u32, u32)>> {
console_log!("compute row layout for width: {}", container_width);
if photos.is_empty() {
return None;
}
let successors = make_successors(
target_height,
container_width,
photos,
limit_node_search,
margin,
);
let path = dijkstra(&0, |p| successors[*p].clone(), |p| *p == photos.len());
let (path, _cost) = if let Some(p) = path {
p
} else {
(Vec::new(), 0)
};
let mut dimensions: Vec<(u32, u32)> = Vec::with_capacity(photos.len());
for i in 1..path.len() {
let row = &photos[path[i - 1]..path[i]];
let height = get_common_height(row, container_width, margin) as u32;
(path[i - 1]..path[i]).for_each(|j| {
let ratio = photos[j].width as f32 / photos[j].height as f32;
dimensions.push(((height as f32 * ratio) as u32, height));
});
}
Some(dimensions)
}

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@@ -1,3 +1,5 @@
pub mod layout;
pub mod grid;
pub use grid::Grid;

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@@ -11,6 +11,10 @@ use gloo_net::http::Request;
use wasm_bindgen::prelude::*;
use yew_hooks::prelude::*;
use ybc::NavbarFixed::Top;
use ybc::TileCtx::{Ancestor, Child, Parent};
use ybc::TileSize::*;
use gallery::Grid;
use yew::prelude::*;
@@ -20,12 +24,11 @@ fn app() -> Html {
let node = use_node_ref();
let size = use_size(node.clone());
let pictures = use_state(|| vec![]);
let pictures = use_state(std::vec::Vec::new);
{
let pictures = pictures.clone();
use_effect_with_deps(
move |_| {
let pictures = pictures.clone();
wasm_bindgen_futures::spawn_local(async move {
let url = "/api/pictures/";
let fetched_pictures: Vec<OutputPicture> = Request::get(url)
@@ -42,12 +45,43 @@ fn app() -> Html {
(),
);
}
let navbrand = html! {
<ybc::NavbarItem>
<ybc::Title classes={classes!("has-text-white")} size={ybc::HeaderSize::Is4}>{"Photos"}</ybc::Title>
</ybc::NavbarItem>
};
let navstart = html! {};
let navend = html! {
<>
<ybc::NavbarItem>
<ybc::ButtonAnchor classes={classes!("is-black", "is-outlined")} rel={String::from("noopener noreferrer")} target={String::from("_blank")} href="https://github.com/thedodd/trunk">
{"Photos"}
</ybc::ButtonAnchor>
</ybc::NavbarItem>
</>
};
html! {
<>
<div ref={node} style={"position: 'relative'"} >
<Grid pictures={(*pictures).clone()} width={size.0} />
</div>
<ybc::Navbar
fixed={Top}
classes={classes!("is-info")}
padded={true}
{navbrand}
{navstart}
{navend}
/>
<ybc::Container fluid=true>
<ybc::Tile ctx={Ancestor}>
<ybc::Tile ctx={Parent} vertical=true size={Twelve}>
<ybc::Tile ctx={Child} classes={classes!("box")}>
<div ref={node} style={"position: 'relative'"} >
<Grid pictures={(*pictures).clone()} width={size.0} />
</div>
</ybc::Tile>
</ybc::Tile>
</ybc::Tile>
</ybc::Container>
</>
}
}