/
document_file.rs
723 lines (672 loc) · 26.1 KB
/
document_file.rs
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pub use super::layer_panel::*;
use crate::{
consts::{ASYMPTOTIC_EFFECT, FILE_EXPORT_SUFFIX, FILE_SAVE_SUFFIX, SCALE_EFFECT, SCROLLBAR_SPACING},
EditorError,
};
use glam::{DAffine2, DVec2};
use graphene::{document::Document as InternalDocument, layers::LayerDataType, DocumentError, LayerId};
use kurbo::PathSeg;
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use crate::input::InputPreprocessor;
use crate::message_prelude::*;
use graphene::layers::BlendMode;
use graphene::{DocumentResponse, Operation as DocumentOperation};
use log::warn;
use std::collections::VecDeque;
use super::movement_handler::{MovementMessage, MovementMessageHandler};
use super::transform_layer_handler::{TransformLayerMessage, TransformLayerMessageHandler};
type DocumentSave = (InternalDocument, HashMap<Vec<LayerId>, LayerData>);
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize, Hash)]
pub enum FlipAxis {
X,
Y,
}
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize, Hash)]
pub enum AlignAxis {
X,
Y,
}
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize, Hash)]
pub enum AlignAggregate {
Min,
Max,
Center,
Average,
}
#[derive(PartialEq, Clone, Debug)]
pub enum VectorManipulatorSegment {
Line(DVec2, DVec2),
Quad(DVec2, DVec2, DVec2),
Cubic(DVec2, DVec2, DVec2, DVec2),
}
#[derive(PartialEq, Clone, Debug)]
pub struct VectorManipulatorShape {
pub path: kurbo::BezPath,
pub segments: Vec<VectorManipulatorSegment>,
pub transform: DAffine2,
}
#[derive(Clone, Debug)]
pub struct DocumentMessageHandler {
pub document: InternalDocument,
pub document_history: Vec<DocumentSave>,
pub document_redo_history: Vec<DocumentSave>,
pub name: String,
pub layer_data: HashMap<Vec<LayerId>, LayerData>,
movement_handler: MovementMessageHandler,
transform_layer_handler: TransformLayerMessageHandler,
}
impl Default for DocumentMessageHandler {
fn default() -> Self {
Self {
document: InternalDocument::default(),
document_history: Vec::new(),
document_redo_history: Vec::new(),
name: String::from("Untitled Document"),
layer_data: vec![(vec![], LayerData::new(true))].into_iter().collect(),
movement_handler: MovementMessageHandler::default(),
transform_layer_handler: TransformLayerMessageHandler::default(),
}
}
}
#[impl_message(Message, DocumentsMessage, Document)]
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub enum DocumentMessage {
#[child]
Movement(MovementMessage),
#[child]
TransformLayers(TransformLayerMessage),
DispatchOperation(Box<DocumentOperation>),
SetSelectedLayers(Vec<Vec<LayerId>>),
AddSelectedLayers(Vec<Vec<LayerId>>),
SelectAllLayers,
SelectionChanged,
DeselectAllLayers,
DeleteLayer(Vec<LayerId>),
DeleteSelectedLayers,
DuplicateSelectedLayers,
CreateFolder(Vec<LayerId>),
SetBlendModeForSelectedLayers(BlendMode),
SetOpacityForSelectedLayers(f64),
RenameLayer(Vec<LayerId>, String),
ToggleLayerVisibility(Vec<LayerId>),
FlipSelectedLayers(FlipAxis),
ToggleLayerExpansion(Vec<LayerId>),
FolderChanged(Vec<LayerId>),
StartTransaction,
RollbackTransaction,
GroupSelectedLayers,
AbortTransaction,
CommitTransaction,
ExportDocument,
SaveDocument,
RenderDocument,
Undo,
Redo,
DocumentHistoryBackward,
DocumentHistoryForward,
ClearOverlays,
NudgeSelectedLayers(f64, f64),
AlignSelectedLayers(AlignAxis, AlignAggregate),
MoveSelectedLayersTo {
path: Vec<LayerId>,
insert_index: isize,
},
ReorderSelectedLayers(i32), // relative_position,
}
impl From<DocumentOperation> for DocumentMessage {
fn from(operation: DocumentOperation) -> DocumentMessage {
Self::DispatchOperation(Box::new(operation))
}
}
impl From<DocumentOperation> for Message {
fn from(operation: DocumentOperation) -> Message {
DocumentMessage::DispatchOperation(Box::new(operation)).into()
}
}
impl DocumentMessageHandler {
pub fn handle_folder_changed(&mut self, path: Vec<LayerId>) -> Option<Message> {
let _ = self.document.render_root();
self.layer_data(&path).expanded.then(|| {
let children = self.layer_panel(path.as_slice()).expect("The provided Path was not valid");
FrontendMessage::ExpandFolder { path: path.into(), children }.into()
})
}
fn clear_selection(&mut self) {
self.layer_data.values_mut().for_each(|layer_data| layer_data.selected = false);
}
fn select_layer(&mut self, path: &[LayerId]) -> Option<Message> {
if self.document.layer(path).ok()?.overlay {
return None;
}
self.layer_data(path).selected = true;
let data = self.layer_panel_entry(path.to_vec()).ok()?;
// TODO: Add deduplication
(!path.is_empty()).then(|| FrontendMessage::UpdateLayer { path: path.to_vec().into(), data }.into())
}
pub fn selected_layers_bounding_box(&self) -> Option<[DVec2; 2]> {
let paths = self.selected_layers().map(|vec| &vec[..]);
self.document.combined_viewport_bounding_box(paths)
}
// TODO: Consider moving this to some kind of overlay manager in the future
pub fn selected_layers_vector_points(&self) -> Vec<VectorManipulatorShape> {
let shapes = self.selected_layers().filter_map(|path_to_shape| {
let viewport_transform = self.document.generate_transform_relative_to_viewport(path_to_shape).ok()?;
let shape = match &self.document.layer(path_to_shape).ok()?.data {
LayerDataType::Shape(shape) => Some(shape),
LayerDataType::Folder(_) => None,
}?;
let path = shape.path.clone();
let segments = path
.segments()
.map(|segment| -> VectorManipulatorSegment {
let place = |point: kurbo::Point| -> DVec2 { viewport_transform.transform_point2(DVec2::from((point.x, point.y))) };
match segment {
PathSeg::Line(line) => VectorManipulatorSegment::Line(place(line.p0), place(line.p1)),
PathSeg::Quad(quad) => VectorManipulatorSegment::Quad(place(quad.p0), place(quad.p1), place(quad.p2)),
PathSeg::Cubic(cubic) => VectorManipulatorSegment::Cubic(place(cubic.p0), place(cubic.p1), place(cubic.p2), place(cubic.p3)),
}
})
.collect::<Vec<VectorManipulatorSegment>>();
Some(VectorManipulatorShape {
path,
segments,
transform: viewport_transform,
})
});
// TODO: Consider refactoring this in a way that avoids needing to collect() so we can skip the heap allocations
shapes.collect::<Vec<VectorManipulatorShape>>()
}
pub fn layerdata(&self, path: &[LayerId]) -> &LayerData {
self.layer_data.get(path).expect("Layerdata does not exist")
}
pub fn layerdata_mut(&mut self, path: &[LayerId]) -> &mut LayerData {
self.layer_data.entry(path.to_vec()).or_insert_with(|| LayerData::new(true))
}
pub fn selected_layers(&self) -> impl Iterator<Item = &[LayerId]> {
self.layer_data.iter().filter_map(|(path, data)| data.selected.then(|| path.as_slice()))
}
/// Returns the paths to all layers in order, optionally including only selected or non-selected layers.
fn layers_sorted(&self, selected: Option<bool>) -> Vec<Vec<LayerId>> {
// Compute the indices for each layer to be able to sort them
let mut layers_with_indices: Vec<(Vec<LayerId>, Vec<usize>)> = self
.layer_data
.iter()
// 'path.len() > 0' filters out root layer since it has no indices
.filter_map(|(path, data)| (!path.is_empty() && (data.selected == selected.unwrap_or(data.selected))).then(|| path.clone()))
.filter_map(|path| {
// Currently it is possible that layer_data contains layers that are don't actually exist (has been partially fixed in #281)
// and thus indices_for_path can return an error. We currently skip these layers and log a warning.
// Once this problem is solved this code can be simplified
match self.document.indices_for_path(&path) {
Err(err) => {
warn!("layers_sorted: Could not get indices for the layer {:?}: {:?}", path, err);
None
}
Ok(indices) => Some((path, indices)),
}
})
.collect();
layers_with_indices.sort_by_key(|(_, indices)| indices.clone());
layers_with_indices.into_iter().map(|(path, _)| path).collect()
}
/// Returns the paths to all layers in order
pub fn all_layers_sorted(&self) -> Vec<Vec<LayerId>> {
self.layers_sorted(None)
}
/// Returns the paths to all selected layers in order
pub fn selected_layers_sorted(&self) -> Vec<Vec<LayerId>> {
self.layers_sorted(Some(true))
}
/// Returns the paths to all non_selected layers in order
#[allow(dead_code)] // used for test cases
pub fn non_selected_layers_sorted(&self) -> Vec<Vec<LayerId>> {
self.layers_sorted(Some(false))
}
pub fn with_name(name: String) -> Self {
Self {
document: InternalDocument::default(),
document_history: Vec::new(),
document_redo_history: Vec::new(),
name,
layer_data: vec![(vec![], LayerData::new(true))].into_iter().collect(),
movement_handler: MovementMessageHandler::default(),
transform_layer_handler: TransformLayerMessageHandler::default(),
}
}
pub fn with_name_and_content(name: String, serialized_content: String) -> Result<Self, EditorError> {
let mut document = Self::with_name(name);
let internal_document = InternalDocument::with_content(&serialized_content);
match internal_document {
Ok(handle) => {
document.document = handle;
Ok(document)
}
Err(DocumentError::InvalidFile(msg)) => Err(EditorError::Document(msg)),
_ => Err(EditorError::Document(String::from("Failed to open file"))),
}
}
pub fn layer_data(&mut self, path: &[LayerId]) -> &mut LayerData {
layer_data(&mut self.layer_data, path)
}
pub fn backup(&mut self) {
self.document_redo_history.clear();
let new_layer_data = self
.layer_data
.iter()
.filter_map(|(key, value)| (!self.document.layer(key).unwrap().overlay).then(|| (key.clone(), *value)))
.collect();
self.document_history.push((self.document.clone_without_overlays(), new_layer_data))
}
pub fn rollback(&mut self) -> Result<(), EditorError> {
self.backup();
self.undo()
}
pub fn undo(&mut self) -> Result<(), EditorError> {
match self.document_history.pop() {
Some((document, layer_data)) => {
let document = std::mem::replace(&mut self.document, document);
let layer_data = std::mem::replace(&mut self.layer_data, layer_data);
self.document_redo_history.push((document, layer_data));
Ok(())
}
None => Err(EditorError::NoTransactionInProgress),
}
}
pub fn redo(&mut self) -> Result<(), EditorError> {
match self.document_redo_history.pop() {
Some((document, layer_data)) => {
let document = std::mem::replace(&mut self.document, document);
let layer_data = std::mem::replace(&mut self.layer_data, layer_data);
let new_layer_data = layer_data
.iter()
.filter_map(|(key, value)| (!self.document.layer(key).unwrap().overlay).then(|| (key.clone(), *value)))
.collect();
self.document_history.push((document.clone_without_overlays(), new_layer_data));
Ok(())
}
None => Err(EditorError::NoTransactionInProgress),
}
}
pub fn layer_panel_entry(&mut self, path: Vec<LayerId>) -> Result<LayerPanelEntry, EditorError> {
let data: LayerData = *layer_data(&mut self.layer_data, &path);
let layer = self.document.layer(&path)?;
let entry = layer_panel_entry(&data, self.document.multiply_transforms(&path)?, layer, path);
Ok(entry)
}
/// Returns a list of `LayerPanelEntry`s intended for display purposes. These don't contain
/// any actual data, but rather attributes such as visibility and names of the layers.
pub fn layer_panel(&mut self, path: &[LayerId]) -> Result<Vec<LayerPanelEntry>, EditorError> {
let folder = self.document.folder(path)?;
let paths: Vec<Vec<LayerId>> = folder.layer_ids.iter().map(|id| [path, &[*id]].concat()).collect();
let data: Vec<LayerData> = paths.iter().map(|path| *layer_data(&mut self.layer_data, path)).collect();
let folder = self.document.folder(path)?;
let entries = folder
.layers()
.iter()
.zip(paths.iter().zip(data))
.rev()
.filter(|(layer, _)| !layer.overlay)
.map(|(layer, (path, data))| {
layer_panel_entry(
&data,
self.document.generate_transform_across_scope(path, Some(self.document.root.transform.inverse())).unwrap(),
layer,
path.to_vec(),
)
})
.collect();
Ok(entries)
}
}
impl MessageHandler<DocumentMessage, &InputPreprocessor> for DocumentMessageHandler {
fn process_action(&mut self, message: DocumentMessage, ipp: &InputPreprocessor, responses: &mut VecDeque<Message>) {
use DocumentMessage::*;
match message {
Movement(message) => self.movement_handler.process_action(message, (layer_data(&mut self.layer_data, &[]), &self.document, ipp), responses),
TransformLayers(message) => self.transform_layer_handler.process_action(message, (&mut self.layer_data, &mut self.document, ipp), responses),
DeleteLayer(path) => responses.push_back(DocumentOperation::DeleteLayer { path }.into()),
StartTransaction => self.backup(),
RollbackTransaction => {
self.rollback().unwrap_or_else(|e| log::warn!("{}", e));
responses.extend([DocumentMessage::RenderDocument.into(), self.handle_folder_changed(vec![]).unwrap()]);
}
AbortTransaction => {
self.undo().unwrap_or_else(|e| log::warn!("{}", e));
responses.extend([DocumentMessage::RenderDocument.into(), self.handle_folder_changed(vec![]).unwrap()]);
}
CommitTransaction => (),
ExportDocument => {
let bbox = self.document.visible_layers_bounding_box().unwrap_or([DVec2::ZERO, ipp.viewport_bounds.size()]);
let size = bbox[1] - bbox[0];
let name = match self.name.ends_with(FILE_SAVE_SUFFIX) {
true => self.name.clone().replace(FILE_SAVE_SUFFIX, FILE_EXPORT_SUFFIX),
false => self.name.clone() + FILE_EXPORT_SUFFIX,
};
responses.push_back(
FrontendMessage::ExportDocument {
document: format!(
r#"<svg xmlns="http://www.w3.org/2000/svg" viewBox="{} {} {} {}">{}{}</svg>"#,
bbox[0].x,
bbox[0].y,
size.x,
size.y,
"\n",
self.document.render_root()
),
name,
}
.into(),
)
}
SaveDocument => {
let name = match self.name.ends_with(FILE_SAVE_SUFFIX) {
true => self.name.clone(),
false => self.name.clone() + FILE_SAVE_SUFFIX,
};
responses.push_back(
FrontendMessage::SaveDocument {
document: self.document.serialize_document(),
name,
}
.into(),
)
}
CreateFolder(mut path) => {
let id = generate_uuid();
path.push(id);
self.layerdata_mut(&path).expanded = true;
responses.push_back(DocumentOperation::CreateFolder { path }.into())
}
GroupSelectedLayers => {
let common_prefix = self.document.common_prefix(self.selected_layers());
let (_id, common_prefix) = common_prefix.split_last().unwrap_or((&0, &[]));
let mut new_folder_path = common_prefix.to_vec();
new_folder_path.push(generate_uuid());
responses.push_back(DocumentsMessage::Copy.into());
responses.push_back(DocumentMessage::DeleteSelectedLayers.into());
responses.push_back(DocumentOperation::CreateFolder { path: new_folder_path.clone() }.into());
responses.push_back(DocumentMessage::ToggleLayerExpansion(new_folder_path.clone()).into());
responses.push_back(
DocumentsMessage::PasteIntoFolder {
path: new_folder_path.clone(),
insert_index: -1,
}
.into(),
);
responses.push_back(DocumentMessage::SetSelectedLayers(vec![new_folder_path]).into());
}
SetBlendModeForSelectedLayers(blend_mode) => {
self.backup();
for path in self.layer_data.iter().filter_map(|(path, data)| data.selected.then(|| path.clone())) {
responses.push_back(DocumentOperation::SetLayerBlendMode { path, blend_mode }.into());
}
}
SetOpacityForSelectedLayers(opacity) => {
self.backup();
let opacity = opacity.clamp(0., 1.);
for path in self.selected_layers().map(|path| path.to_vec()) {
responses.push_back(DocumentOperation::SetLayerOpacity { path, opacity }.into());
}
}
ToggleLayerVisibility(path) => {
responses.push_back(DocumentOperation::ToggleLayerVisibility { path }.into());
}
ToggleLayerExpansion(path) => {
self.layer_data(&path).expanded ^= true;
match self.layer_data(&path).expanded {
true => responses.push_back(FolderChanged(path.clone()).into()),
false => responses.push_back(FrontendMessage::CollapseFolder { path: path.clone().into() }.into()),
}
responses.extend(self.layer_panel_entry(path.clone()).ok().map(|data| FrontendMessage::UpdateLayer { path: path.into(), data }.into()));
}
SelectionChanged => {
// TODO: Hoist this duplicated code into wider system
responses.push_back(ToolMessage::SelectedLayersChanged.into());
}
DeleteSelectedLayers => {
self.backup();
responses.push_front(ToolMessage::SelectedLayersChanged.into());
for path in self.selected_layers().map(|path| path.to_vec()) {
responses.push_front(DocumentOperation::DeleteLayer { path }.into());
}
}
ClearOverlays => {
responses.push_back(ToolMessage::SelectedLayersChanged.into());
for path in self.layer_data.keys().filter(|path| self.document.layer(path).unwrap().overlay).cloned() {
responses.push_front(DocumentOperation::DeleteLayer { path }.into());
}
}
DuplicateSelectedLayers => {
self.backup();
for path in self.selected_layers_sorted() {
responses.push_back(DocumentOperation::DuplicateLayer { path }.into());
}
}
SetSelectedLayers(paths) => {
self.clear_selection();
responses.push_front(AddSelectedLayers(paths).into());
}
AddSelectedLayers(paths) => {
for path in paths {
responses.extend(self.select_layer(&path));
}
// TODO: Correctly update layer panel in clear_selection instead of here
responses.push_back(FolderChanged(Vec::new()).into());
responses.push_back(ToolMessage::SelectedLayersChanged.into());
}
SelectAllLayers => {
let all_layer_paths = self
.layer_data
.keys()
.filter(|path| !path.is_empty() && !self.document.layer(path).map(|layer| layer.overlay).unwrap_or(false))
.cloned()
.collect::<Vec<_>>();
responses.push_front(SetSelectedLayers(all_layer_paths).into());
}
DeselectAllLayers => responses.push_front(SetSelectedLayers(vec![]).into()),
DocumentHistoryBackward => self.undo().unwrap_or_else(|e| log::warn!("{}", e)),
DocumentHistoryForward => self.redo().unwrap_or_else(|e| log::warn!("{}", e)),
Undo => {
responses.push_back(SelectMessage::Abort.into());
responses.push_back(DocumentHistoryBackward.into());
responses.push_back(ToolMessage::SelectedLayersChanged.into());
responses.push_back(RenderDocument.into());
responses.push_back(FolderChanged(vec![]).into());
}
Redo => {
responses.push_back(SelectMessage::Abort.into());
responses.push_back(DocumentHistoryForward.into());
responses.push_back(ToolMessage::SelectedLayersChanged.into());
responses.push_back(RenderDocument.into());
responses.push_back(FolderChanged(vec![]).into());
}
FolderChanged(path) => responses.extend(self.handle_folder_changed(path)),
DispatchOperation(op) => match self.document.handle_operation(&op) {
Ok(Some(document_responses)) => {
responses.extend(
document_responses
.into_iter()
.map(|response| match response {
DocumentResponse::FolderChanged { path } => Some(FolderChanged(path).into()),
DocumentResponse::DeletedLayer { path } => {
self.layer_data.remove(&path);
Some(ToolMessage::SelectedLayersChanged.into())
}
DocumentResponse::LayerChanged { path } => self.layer_panel_entry(path.clone()).ok().and_then(|entry| {
let overlay = self.document.layer(&path).unwrap().overlay;
(!overlay).then(|| FrontendMessage::UpdateLayer { path: path.into(), data: entry }.into())
}),
DocumentResponse::CreatedLayer { path } => {
self.layer_data.insert(path.clone(), LayerData::new(false));
(!self.document.layer(&path).unwrap().overlay).then(|| SetSelectedLayers(vec![path]).into())
}
DocumentResponse::DocumentChanged => Some(RenderDocument.into()),
})
.flatten(),
);
log::debug!("LayerPanel: {:?}", self.layer_data.keys());
}
Err(e) => log::error!("DocumentError: {:?}", e),
Ok(_) => (),
},
RenderDocument => {
responses.push_back(
FrontendMessage::UpdateCanvas {
document: self.document.render_root(),
}
.into(),
);
let scale = 0.5 + ASYMPTOTIC_EFFECT + self.layerdata(&[]).scale * SCALE_EFFECT;
let viewport_size = ipp.viewport_bounds.size();
let viewport_mid = ipp.viewport_bounds.center();
let [bounds1, bounds2] = self.document.visible_layers_bounding_box().unwrap_or([viewport_mid; 2]);
let bounds1 = bounds1.min(viewport_mid) - viewport_size * scale;
let bounds2 = bounds2.max(viewport_mid) + viewport_size * scale;
let bounds_length = (bounds2 - bounds1) * (1. + SCROLLBAR_SPACING);
let scrollbar_position = DVec2::splat(0.5) - (bounds1.lerp(bounds2, 0.5) - viewport_mid) / (bounds_length - viewport_size);
let scrollbar_multiplier = bounds_length - viewport_size;
let scrollbar_size = viewport_size / bounds_length;
responses.push_back(
FrontendMessage::UpdateScrollbars {
position: scrollbar_position.into(),
size: scrollbar_size.into(),
multiplier: scrollbar_multiplier.into(),
}
.into(),
);
}
NudgeSelectedLayers(x, y) => {
self.backup();
for path in self.selected_layers().map(|path| path.to_vec()) {
let operation = DocumentOperation::TransformLayerInViewport {
path,
transform: DAffine2::from_translation((x, y).into()).to_cols_array(),
};
responses.push_back(operation.into());
}
responses.push_back(ToolMessage::SelectedLayersChanged.into());
}
MoveSelectedLayersTo { path, insert_index } => {
responses.push_back(DocumentsMessage::Copy.into());
responses.push_back(DocumentMessage::DeleteSelectedLayers.into());
responses.push_back(DocumentsMessage::PasteIntoFolder { path, insert_index }.into());
}
ReorderSelectedLayers(relative_position) => {
self.backup();
let all_layer_paths = self.all_layers_sorted();
let selected_layers = self.selected_layers_sorted();
if let Some(pivot) = match relative_position.signum() {
-1 => selected_layers.first(),
1 => selected_layers.last(),
_ => unreachable!(),
} {
let all_layer_paths: Vec<_> = all_layer_paths
.iter()
.filter(|layer| layer.starts_with(&pivot[0..pivot.len() - 1]) && pivot.len() == layer.len())
.collect();
if let Some(pos) = all_layer_paths.iter().position(|path| *path == pivot) {
let max = all_layer_paths.len() as i64 - 1;
let insert_pos = (pos as i64 + relative_position as i64).clamp(0, max) as usize;
let insert = all_layer_paths.get(insert_pos);
if let Some(insert_path) = insert {
let (id, path) = insert_path.split_last().expect("Can't move the root folder");
if let Some(folder) = self.document.layer(path).ok().map(|layer| layer.as_folder().ok()).flatten() {
let selected: Vec<_> = selected_layers
.iter()
.filter(|layer| layer.starts_with(path) && layer.len() == path.len() + 1)
.map(|x| x.last().unwrap())
.collect();
let non_selected: Vec<_> = folder.layer_ids.iter().filter(|id| selected.iter().all(|x| x != id)).collect();
let offset = if relative_position < 0 || non_selected.is_empty() { 0 } else { 1 };
let fallback = offset * (non_selected.len());
let insert_index = non_selected.iter().position(|x| *x == id).map(|x| x + offset).unwrap_or(fallback) as isize;
responses.push_back(DocumentMessage::MoveSelectedLayersTo { path: path.to_vec(), insert_index }.into());
}
}
}
}
}
FlipSelectedLayers(axis) => {
self.backup();
let scale = match axis {
FlipAxis::X => DVec2::new(-1., 1.),
FlipAxis::Y => DVec2::new(1., -1.),
};
if let Some([min, max]) = self.document.combined_viewport_bounding_box(self.selected_layers().map(|x| x)) {
let center = (max + min) / 2.;
let bbox_trans = DAffine2::from_translation(-center);
for path in self.selected_layers() {
responses.push_back(
DocumentOperation::TransformLayerInScope {
path: path.to_vec(),
transform: DAffine2::from_scale(scale).to_cols_array(),
scope: bbox_trans.to_cols_array(),
}
.into(),
);
}
responses.push_back(ToolMessage::SelectedLayersChanged.into());
}
}
AlignSelectedLayers(axis, aggregate) => {
self.backup();
let (paths, boxes): (Vec<_>, Vec<_>) = self.selected_layers().filter_map(|path| self.document.viewport_bounding_box(path).ok()?.map(|b| (path, b))).unzip();
let axis = match axis {
AlignAxis::X => DVec2::X,
AlignAxis::Y => DVec2::Y,
};
let lerp = |bbox: &[DVec2; 2]| bbox[0].lerp(bbox[1], 0.5);
if let Some(combined_box) = self.document.combined_viewport_bounding_box(self.selected_layers().map(|x| x)) {
let aggregated = match aggregate {
AlignAggregate::Min => combined_box[0],
AlignAggregate::Max => combined_box[1],
AlignAggregate::Center => lerp(&combined_box),
AlignAggregate::Average => boxes.iter().map(|b| lerp(b)).reduce(|a, b| a + b).map(|b| b / boxes.len() as f64).unwrap(),
};
for (path, bbox) in paths.into_iter().zip(boxes) {
let center = match aggregate {
AlignAggregate::Min => bbox[0],
AlignAggregate::Max => bbox[1],
_ => lerp(&bbox),
};
let translation = (aggregated - center) * axis;
responses.push_back(
DocumentOperation::TransformLayerInViewport {
path: path.to_vec(),
transform: DAffine2::from_translation(translation).to_cols_array(),
}
.into(),
);
}
responses.push_back(ToolMessage::SelectedLayersChanged.into());
}
}
RenameLayer(path, name) => responses.push_back(DocumentOperation::RenameLayer { path, name }.into()),
}
}
fn actions(&self) -> ActionList {
let mut common = actions!(DocumentMessageDiscriminant;
Undo,
Redo,
SelectAllLayers,
DeselectAllLayers,
RenderDocument,
ExportDocument,
SaveDocument,
);
if self.layer_data.values().any(|data| data.selected) {
let select = actions!(DocumentMessageDiscriminant;
DeleteSelectedLayers,
DuplicateSelectedLayers,
NudgeSelectedLayers,
ReorderSelectedLayers,
GroupSelectedLayers,
);
common.extend(select);
}
common.extend(self.movement_handler.actions());
common.extend(self.transform_layer_handler.actions());
common
}
}