widgets

packages/codemirror/index.mjs

@@ -1,3 +1,4 @@
 export * from './codemirror.mjs';
 export * from './highlight.mjs';
 export * from './flash.mjs';
+export * from './slider.mjs';

packages/codemirror/slider.mjs

@@ -0,0 +1,132 @@
+import { ref, pure } from '@strudel.cycles/core';
+import { WidgetType, ViewPlugin, Decoration } from '@codemirror/view';
+import { StateEffect, StateField } from '@codemirror/state';
+
+export let sliderValues = {};
+const getSliderID = (from) => `slider_${from}`;
+
+export class SliderWidget extends WidgetType {
+  constructor(value, min, max, from, to, view) {
+    super();
+    this.value = value;
+    this.min = min;
+    this.max = max;
+    this.from = from;
+    this.originalFrom = from;
+    this.to = to;
+    this.view = view;
+  }
+
+  eq() {
+    return false;
+  }
+
+  toDOM() {
+    let wrap = document.createElement('span');
+    wrap.setAttribute('aria-hidden', 'true');
+    wrap.className = 'cm-slider'; // inline-flex items-center
+    let slider = wrap.appendChild(document.createElement('input'));
+    slider.type = 'range';
+    slider.min = this.min;
+    slider.max = this.max;
+    slider.step = (this.max - this.min) / 1000;
+    slider.originalValue = this.value;
+    // to make sure the code stays in sync, let's save the original value
+    // becuase .value automatically clamps values so it'll desync with the code
+    slider.value = slider.originalValue;
+    slider.from = this.from;
+    slider.originalFrom = this.originalFrom;
+    slider.to = this.to;
+    slider.style = 'width:64px;margin-right:4px;transform:translateY(4px)';
+    this.slider = slider;
+    slider.addEventListener('input', (e) => {
+      const next = e.target.value;
+      let insert = next;
+      //let insert = next.toFixed(2);
+      const to = slider.from + slider.originalValue.length;
+      let change = { from: slider.from, to, insert };
+      slider.originalValue = insert;
+      slider.value = insert;
+      this.view.dispatch({ changes: change });
+      const id = getSliderID(slider.originalFrom); // matches id generated in transpiler
+      window.postMessage({ type: 'cm-slider', value: Number(next), id });
+    });
+    return wrap;
+  }
+
+  ignoreEvent(e) {
+    return true;
+  }
+}
+
+export const setWidgets = StateEffect.define();
+
+export const updateWidgets = (view, widgets) => {
+  view.dispatch({ effects: setWidgets.of(widgets) });
+};
+
+function getWidgets(widgetConfigs, view) {
+  return widgetConfigs.map(({ from, to, value, min, max }) => {
+    return Decoration.widget({
+      widget: new SliderWidget(value, min, max, from, to, view),
+      side: 0,
+    }).range(from /* , to */);
+  });
+}
+
+export const sliderPlugin = ViewPlugin.fromClass(
+  class {
+    decorations; //: DecorationSet
+
+    constructor(view /* : EditorView */) {
+      this.decorations = Decoration.set([]);
+    }
+
+    update(update /* : ViewUpdate */) {
+      update.transactions.forEach((tr) => {
+        if (tr.docChanged) {
+          this.decorations = this.decorations.map(tr.changes);
+          const iterator = this.decorations.iter();
+          while (iterator.value) {
+            // when the widgets are moved, we need to tell the dom node the current position
+            // this is important because the updateSliderValue function has to work with the dom node
+            iterator.value.widget.slider.from = iterator.from;
+            iterator.value.widget.slider.to = iterator.to;
+            iterator.next();
+          }
+        }
+        for (let e of tr.effects) {
+          if (e.is(setWidgets)) {
+            this.decorations = Decoration.set(getWidgets(e.value, update.view));
+          }
+        }
+      });
+    }
+  },
+  {
+    decorations: (v) => v.decorations,
+  },
+);
+
+export let slider = (value) => {
+  console.warn('slider will only work when the transpiler is used... passing value as is');
+  return pure(value);
+};
+// function transpiled from slider = (value, min, max)
+export let sliderWithID = (id, value, min, max) => {
+  sliderValues[id] = value; // sync state at eval time (code -> state)
+  return ref(() => sliderValues[id]); // use state at query time
+};
+// update state when sliders are moved
+if (typeof window !== 'undefined') {
+  window.addEventListener('message', (e) => {
+    if (e.data.type === 'cm-slider') {
+      if (sliderValues[e.data.id] !== undefined) {
+        // update state when slider is moved
+        sliderValues[e.data.id] = e.data.value;
+      } else {
+        console.warn(`slider with id "${e.data.id}" is not registered. Only ${Object.keys(sliderValues)}`);
+      }
+    }
+  });
+}

packages/react/src/components/CodeMirror6.jsx

@@ -15,10 +15,11 @@ import {
   updateMiniLocations,
 } from '@strudel/codemirror';
 import './style.css';
+import { sliderPlugin } from '@strudel/codemirror/slider.mjs';
 
 export { flash, highlightMiniLocations, updateMiniLocations };
 
-const staticExtensions = [javascript(), flashField, highlightExtension];
+const staticExtensions = [javascript(), flashField, highlightExtension, sliderPlugin];
 
 export default function CodeMirror({
   value,

packages/react/src/hooks/useWidgets.mjs

@@ -0,0 +1,13 @@
+import { useEffect, useState } from 'react';
+import { updateWidgets } from '@strudel/codemirror';
+
+// i know this is ugly.. in the future, repl needs to run without react
+export function useWidgets(view) {
+  const [widgets, setWidgets] = useState([]);
+  useEffect(() => {
+    if (view) {
+      updateWidgets(view, widgets);
+    }
+  }, [view, widgets]);
+  return { widgets, setWidgets };
+}

packages/transpiler/transpiler.mjs

@@ -5,7 +5,7 @@ import { isNoteWithOctave } from '@strudel.cycles/core';
 import { getLeafLocations } from '@strudel.cycles/mini';
 
 export function transpiler(input, options = {}) {
-  const { wrapAsync = false, addReturn = true, emitMiniLocations = true } = options;
+  const { wrapAsync = false, addReturn = true, emitMiniLocations = true, emitWidgets = true } = options;
 
   let ast = parse(input, {
     ecmaVersion: 2022,
@@ -16,9 +16,9 @@ export function transpiler(input, options = {}) {
   let miniLocations = [];
   const collectMiniLocations = (value, node) => {
     const leafLocs = getLeafLocations(`"${value}"`, node.start); // stimmt!
-    //const withOffset = leafLocs.map((offsets) => offsets.map((o) => o + node.start));
     miniLocations = miniLocations.concat(leafLocs);
   };
+  let widgets = [];
 
   walk(ast, {
     enter(node, parent /* , prop, index */) {
@@ -35,6 +35,17 @@ export function transpiler(input, options = {}) {
         emitMiniLocations && collectMiniLocations(value, node);
         return this.replace(miniWithLocation(value, node));
       }
+      if (isWidgetFunction(node)) {
+        emitWidgets &&
+          widgets.push({
+            from: node.arguments[0].start,
+            to: node.arguments[0].end,
+            value: node.arguments[0].raw, // don't use value!
+            min: node.arguments[1]?.value ?? 0,
+            max: node.arguments[2]?.value ?? 1,
+          });
+        return this.replace(widgetWithLocation(node));
+      }
       // TODO: remove pseudo note variables?
       if (node.type === 'Identifier' && isNoteWithOctave(node.name)) {
         this.skip();
@@ -64,15 +75,14 @@ export function transpiler(input, options = {}) {
   if (!emitMiniLocations) {
     return { output };
   }
-  return { output, miniLocations };
+  return { output, miniLocations, widgets };
 }
 
 function isStringWithDoubleQuotes(node, locations, code) {
-  const { raw, type } = node;
-  if (type !== 'Literal') {
+  if (node.type !== 'Literal') {
     return false;
   }
-  return raw[0] === '"';
+  return node.raw[0] === '"';
 }
 
 function isBackTickString(node, parent) {
@@ -94,3 +104,22 @@ function miniWithLocation(value, node) {
     optional: false,
   };
 }
+
+// these functions are connected to @strudel/codemirror -> slider.mjs
+// maybe someday there will be pluggable transpiler functions, then move this there
+function isWidgetFunction(node) {
+  return node.type === 'CallExpression' && node.callee.name === 'slider';
+}
+
+function widgetWithLocation(node) {
+  const id = 'slider_' + node.arguments[0].start; // use loc of first arg for id
+  // add loc as identifier to first argument
+  // the sliderWithID function is assumed to be sliderWithID(id, value, min?, max?)
+  node.arguments.unshift({
+    type: 'Literal',
+    value: id,
+    raw: id,
+  });
+  node.callee.name = 'sliderWithID';
+  return node;
+}

website/src/repl/Repl.jsx

@@ -22,6 +22,7 @@ import Loader from './Loader';
 import { settingPatterns } from '../settings.mjs';
 import { code2hash, hash2code } from './helpers.mjs';
 import { isTauri } from '../tauri.mjs';
+import { useWidgets } from '@strudel.cycles/react/src/hooks/useWidgets.mjs';
 
 const { latestCode } = settingsMap.get();
 
@@ -39,6 +40,7 @@ let modules = [
   import('@strudel.cycles/mini'),
   import('@strudel.cycles/xen'),
   import('@strudel.cycles/webaudio'),
+  import('@strudel/codemirror'),
 
   import('@strudel.cycles/serial'),
   import('@strudel.cycles/soundfonts'),
@@ -128,7 +130,7 @@ export function Repl({ embedded = false }) {
   } = useSettings();
 
   const paintOptions = useMemo(() => ({ fontFamily }), [fontFamily]);
-
+  const { setWidgets } = useWidgets(view);
   const { code, setCode, scheduler, evaluate, activateCode, isDirty, activeCode, pattern, started, stop, error } =
     useStrudel({
       initialCode: '// LOADING...',
@@ -142,6 +144,7 @@ export function Repl({ embedded = false }) {
       },
       afterEval: ({ code, meta }) => {
         setMiniLocations(meta.miniLocations);
+        setWidgets(meta.widgets);
         setPending(false);
         setLatestCode(code);
         window.location.hash = '#' + code2hash(code);
@@ -219,7 +222,7 @@ export function Repl({ embedded = false }) {
   const handleChangeCode = useCallback(
     (c) => {
       setCode(c);
-      started && logger('[edit] code changed. hit ctrl+enter to update');
+      //started && logger('[edit] code changed. hit ctrl+enter to update');
     },
     [started],
   );