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import Base64 from 'vtk.js/Sources/Common/Core/Base64';
import vtkRenderWindow from 'vtk.js/Sources/Rendering/Core/RenderWindow';
import vtkObjectManager from './ObjectManager';
const SYNCHRONIZER_CONTEXTS = {};
// ----------------------------------------------------------------------------
// Static methods
// ----------------------------------------------------------------------------
function createArrayHandler() {
const dataArrayCache = {};
let arrayFetcher = null;
function setFetchArrayFunction(fetcher) {
arrayFetcher = fetcher;
}
function getArray(sha, dataType, context) {
const arrayEntry = dataArrayCache[sha];
if (arrayEntry) {
arrayEntry.mtimes[context.getActiveViewId()] = context.getMTime();
return new Promise((resolve, reject) => {
resolve(arrayEntry.array);
});
}
if (!arrayFetcher) {
return Promise.reject(
new Error(
'No array fetcher found, please use "setArrayFetcher" to provide one'
)
);
}
return new Promise((resolve, reject) => {
arrayFetcher(sha).then(
(data) => {
let buffer = data;
if (typeof data === 'string') {
buffer = Base64.toArrayBuffer(data);
}
if (buffer instanceof Blob) {
const fileReader = new FileReader();
fileReader.onload = () => {
const array = macro.newTypedArray(dataType, fileReader.result);
const mtimes = {
[context.getActiveViewId()]: context.getMTime(),
};
dataArrayCache[sha] = { mtimes, array };
resolve(array);
};
fileReader.readAsArrayBuffer(buffer);
} else {
const array = macro.newTypedArray(dataType, buffer);
const mtimes = { [context.getActiveViewId()]: context.getMTime() };
dataArrayCache[sha] = { mtimes, array };
resolve(array);
}
},
(error) => {
console.log('Error getting data array:');
console.log(error);
reject(error);
}
);
});
}
function emptyCachedArrays() {
Object.keys(dataArrayCache).forEach((key) => {
delete dataArrayCache[key];
});
}
function freeOldArrays(threshold, context) {
const mtimeThreshold = context.getMTime() - threshold;
Object.keys(dataArrayCache)
.filter((key) => dataArrayCache[key].mtimes[context.getActiveViewId()])
.filter(
(key) =>
dataArrayCache[key].mtimes[context.getActiveViewId()] < mtimeThreshold
)
.forEach((key) => {
delete dataArrayCache[key];
});
}
return {
setFetchArrayFunction,
getArray,
emptyCachedArrays,
freeOldArrays,
};
}
// ----------------------------------------------------------------------------
function createInstanceMap() {
const instances = {};
function getInstance(id) {
return instances[id];
}
function getInstanceId(instance) {
let instanceId = null;
Object.keys(instances).forEach((id) => {
if (instance === instances[id]) {
instanceId = id;
}
});
return instanceId;
}
function registerInstance(id, instance) {
instances[id] = instance;
instance.set({ remoteId: id }, true, true);
}
function unregisterInstance(id) {
delete instances[id];
}
function emptyCachedInstances() {
Object.keys(instances).forEach((key) => {
delete instances[key];
});
}
return {
getInstance,
getInstanceId,
registerInstance,
unregisterInstance,
emptyCachedInstances,
};
}
// ----------------------------------------------------------------------------
function createProgressHandler() {
let readyCount = 0;
const publicAPI = {
start() {
readyCount += 1;
publicAPI.invokeProgressEvent(readyCount);
},
end() {
readyCount -= 1;
publicAPI.invokeProgressEvent(readyCount);
if (readyCount === 0) {
publicAPI.invokeProgressDone();
}
},
resetProgress() {
readyCount = 0;
},
};
const model = {};
macro.event(publicAPI, model, 'progressEvent');
macro.event(publicAPI, model, 'progressDone');
return publicAPI;
}
// ----------------------------------------------------------------------------
function createSceneMtimeHandler() {
const mtimes = {};
let activeViewId = 'default';
function getMTime(viewId) {
const key = viewId || activeViewId;
return mtimes[key] || 1;
}
function incrementMTime(viewId) {
const key = viewId || activeViewId;
if (!mtimes[key]) {
mtimes[key] = 1;
}
mtimes[key] += 1;
}
function setActiveViewId(viewId) {
activeViewId = viewId;
}
function getActiveViewId() {
return activeViewId;
}
return { getMTime, incrementMTime, setActiveViewId, getActiveViewId };
}
// ----------------------------------------------------------------------------
function getSynchronizerContext(name = 'default') {
let ctx = SYNCHRONIZER_CONTEXTS[name];
if (!ctx) {
ctx = {
...createArrayHandler(),
...createInstanceMap(),
...createProgressHandler(),
...createSceneMtimeHandler(),
};
SYNCHRONIZER_CONTEXTS[name] = ctx;
}
return ctx;
}
// ----------------------------------------------------------------------------
function setSynchronizerContext(name, ctx) {
SYNCHRONIZER_CONTEXTS[name] = ctx;
}
function clearSynchronizerContext(name) {
if (name && SYNCHRONIZER_CONTEXTS[name]) {
delete SYNCHRONIZER_CONTEXTS[name];
}
if (!name) {
const keys = Object.keys(SYNCHRONIZER_CONTEXTS);
for (let i = 0; i < keys.length; i++) {
delete SYNCHRONIZER_CONTEXTS[keys[i]];
}
}
}
// ----------------------------------------------------------------------------
function createSyncFunction(renderWindow, synchronizerContext) {
let lastMtime = -1;
let gcThreshold = 100;
const getManagedInstanceId = (instance) =>
instance.get('managedInstanceId').managedInstanceId;
const getManagedInstanceIds = () =>
macro.traverseInstanceTree(renderWindow, getManagedInstanceId);
function clearOneTimeUpdaters() {
vtkObjectManager.clearOneTimeUpdaters(getManagedInstanceIds());
}
function setSynchronizedViewId(synchronizedViewId) {
renderWindow.set({ synchronizedViewId }, true, true);
}
function getSynchronizedViewId() {
return renderWindow.get('synchronizedViewId').synchronizedViewId;
}
function updateGarbageCollectorThreshold(v) {
gcThreshold = v;
}
function synchronize(state) {
if (!getSynchronizedViewId()) {
setSynchronizedViewId(state.id);
}
const mtime = state.mtime || 0;
if (getSynchronizedViewId() === state.id && lastMtime < mtime) {
return new Promise((resolve, reject) => {
const subscription = synchronizerContext.onProgressDone(() => {
subscription.unsubscribe();
renderWindow.render();
resolve(true);
});
lastMtime = mtime;
synchronizerContext.setActiveViewId(state.id);
synchronizerContext.incrementMTime();
vtkObjectManager.updateRenderWindow(
renderWindow,
state,
synchronizerContext
);
synchronizerContext.freeOldArrays(gcThreshold, synchronizerContext);
});
}
return Promise.resolve(false);
}
return {
synchronize,
setSynchronizedViewId,
getSynchronizedViewId,
updateGarbageCollectorThreshold,
getManagedInstanceIds,
clearOneTimeUpdaters,
};
}
// ----------------------------------------------------------------------------
// vtkSynchronizableRenderWindow methods
// ----------------------------------------------------------------------------
function vtkSynchronizableRenderWindow(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkSynchronizableRenderWindow');
if (!model.synchronizerContext) {
model.synchronizerContext = getSynchronizerContext(
model.synchronizerContextName
);
}
const addOn = createSyncFunction(publicAPI, model.synchronizerContext);
Object.keys(addOn).forEach((methodName) => {
Iif (publicAPI[methodName]) {
publicAPI[methodName] = macro.chain(
publicAPI[methodName],
addOn[methodName]
);
} else {
publicAPI[methodName] = addOn[methodName];
}
});
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
export const DEFAULT_VALUES = {
synchronizerContextName: 'default',
synchronizerContext: null,
synchronizedViewId: null,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
vtkRenderWindow.extend(publicAPI, model);
macro.get(publicAPI, model, ['synchronizerContext']);
// Object methods
vtkSynchronizableRenderWindow(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkSynchronizableRenderWindow'
);
// ----------------------------------------------------------------------------
// More Static methods
// ----------------------------------------------------------------------------
function decorate(renderWindow, name = 'default') {
const addOn = createSyncFunction(renderWindow, getSynchronizerContext(name));
return {
...addOn,
...renderWindow,
delete: macro.chain(renderWindow.delete, addOn.delete),
};
}
// ----------------------------------------------------------------------------
export default {
newInstance,
extend,
getSynchronizerContext,
setSynchronizerContext,
clearSynchronizerContext,
decorate,
createInstanceMap,
createArrayHandler,
createProgressHandler,
createSceneMtimeHandler,
vtkObjectManager,
};
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