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use scene::{AnimationChannel, ChannelData, ElementAnimations, ScalarAnimationKey, ScalarChannel};
use serde::{Deserialize, Serialize};
use crate::channel_data::get_channel_entries_from_data;
#[derive(Serialize, Deserialize, Clone, Copy, Debug, Eq, PartialEq)]
#[serde(rename_all = "camelCase")]
pub enum ChannelEasingMode {
Independent,
Shared,
}
#[derive(Clone, Debug, PartialEq)]
pub struct ScalarGraphChannel {
pub property_path: String,
pub component_key: String,
pub channel: ScalarChannel,
}
#[derive(Clone, Debug, PartialEq)]
pub struct EditableScalarChannels {
pub easing_mode: ChannelEasingMode,
pub channels: Vec<ScalarGraphChannel>,
}
#[derive(Clone, Debug, PartialEq)]
pub struct ScalarGraphKeyframeContext {
pub property_path: String,
pub component_key: String,
pub channel: ScalarChannel,
pub keyframe: ScalarAnimationKey,
pub keyframe_index: usize,
pub previous_key: Option<ScalarAnimationKey>,
pub next_key: Option<ScalarAnimationKey>,
}
fn easing_mode_for_channel_data(data: &ChannelData) -> ChannelEasingMode {
match data {
ChannelData::Composite(components)
if ["r", "g", "b", "a"]
.iter()
.all(|key| components.contains_key(*key)) =>
{
ChannelEasingMode::Shared
}
_ => ChannelEasingMode::Independent,
}
}
pub fn get_editable_scalar_channels(
animations: Option<&ElementAnimations>,
property_path: &str,
) -> Option<EditableScalarChannels> {
let data = animations?.get(property_path)?;
let channels = get_channel_entries_from_data(Some(data))
.into_iter()
.filter_map(|(component_key, channel)| match channel {
AnimationChannel::Scalar(scalar) => Some(ScalarGraphChannel {
property_path: property_path.to_string(),
component_key,
channel: scalar.clone(),
}),
AnimationChannel::Discrete(_) => None,
})
.collect();
Some(EditableScalarChannels {
easing_mode: easing_mode_for_channel_data(data),
channels,
})
}
pub fn get_editable_scalar_channel(
animations: Option<&ElementAnimations>,
property_path: &str,
component_key: &str,
) -> Option<ScalarGraphChannel> {
get_editable_scalar_channels(animations, property_path)?
.channels
.into_iter()
.find(|channel| channel.component_key == component_key)
}
pub fn get_scalar_keyframe_context(
animations: Option<&ElementAnimations>,
property_path: &str,
component_key: &str,
keyframe_id: &str,
) -> Option<ScalarGraphKeyframeContext> {
let graph_channel = get_editable_scalar_channel(animations, property_path, component_key)?;
let keyframe_index = graph_channel
.channel
.keys
.iter()
.position(|key| key.id == keyframe_id)?;
Some(ScalarGraphKeyframeContext {
property_path: graph_channel.property_path,
component_key: graph_channel.component_key,
keyframe: graph_channel.channel.keys[keyframe_index].clone(),
keyframe_index,
previous_key: keyframe_index
.checked_sub(1)
.and_then(|index| graph_channel.channel.keys.get(index))
.cloned(),
next_key: graph_channel.channel.keys.get(keyframe_index + 1).cloned(),
channel: graph_channel.channel,
})
}
#[cfg(test)]
mod tests {
use super::*;
use scene::{ScalarSegmentType, TangentMode};
use std::collections::BTreeMap;
use time::MediaTime;
fn key(id: &str, time: i64) -> ScalarAnimationKey {
ScalarAnimationKey {
id: id.to_string(),
time: MediaTime::from_ticks(time),
value: 0.0,
left_handle: None,
right_handle: None,
segment_to_next: ScalarSegmentType::Linear,
tangent_mode: TangentMode::Flat,
}
}
fn scalar_channel(keys: Vec<ScalarAnimationKey>) -> AnimationChannel {
AnimationChannel::Scalar(ScalarChannel {
keys,
extrapolation: None,
})
}
#[test]
fn exposes_scalar_channels_for_editing() {
let mut animations: ElementAnimations = BTreeMap::new();
animations.insert(
"opacity".to_string(),
ChannelData::Single(scalar_channel(vec![key("a", 0), key("b", 10)])),
);
let editable = get_editable_scalar_channels(Some(&animations), "opacity").unwrap();
assert_eq!(editable.easing_mode, ChannelEasingMode::Independent);
assert_eq!(editable.channels.len(), 1);
assert_eq!(editable.channels[0].component_key, "value");
let context =
get_scalar_keyframe_context(Some(&animations), "opacity", "value", "b").unwrap();
assert_eq!(context.keyframe_index, 1);
assert_eq!(context.previous_key.as_ref().map(|key| key.id.as_str()), Some("a"));
assert_eq!(context.next_key, None);
}
#[test]
fn color_composites_share_easing() {
let mut components = BTreeMap::new();
for component_key in ["r", "g", "b", "a"] {
components.insert(component_key.to_string(), scalar_channel(vec![key("k", 0)]));
}
let mut animations: ElementAnimations = BTreeMap::new();
animations.insert("color".to_string(), ChannelData::Composite(components));
let editable = get_editable_scalar_channels(Some(&animations), "color").unwrap();
assert_eq!(editable.easing_mode, ChannelEasingMode::Shared);
assert_eq!(editable.channels.len(), 4);
}
#[test]
fn discrete_channels_are_not_editable_scalars() {
let channel = AnimationChannel::Discrete(scene::DiscreteChannel {
keys: vec![scene::DiscreteAnimationKey {
id: "d".to_string(),
time: MediaTime::from_ticks(0),
value: scene::DiscreteValue::Bool(true),
}],
});
let mut animations: ElementAnimations = BTreeMap::new();
animations.insert("params.visible".to_string(), ChannelData::Single(channel));
let editable = get_editable_scalar_channels(Some(&animations), "params.visible").unwrap();
assert!(editable.channels.is_empty());
}
}
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