From b6a1104745a7c4e34919e2b9ff631d1a0442296d Mon Sep 17 00:00:00 2001
From: Math_R_ <mathieu.richard747@gmail.com>
Date: Thu, 23 May 2024 15:20:39 +0200
Subject: [PATCH] ui-manchette: first version of proportional manchette

This first version is still in development, there is some questions about which operationnal point hide or not
---
 ui-manchette/src/components/Manchette.tsx     | 13 +++-
 .../src/components/OperationalPoint.tsx       |  6 +-
 .../src/components/OperationalPointList.tsx   | 62 ++++++++++++++++---
 ui-manchette/src/components/helpers.ts        |  3 +
 .../src/styles/operational-point-list.css     |  1 -
 5 files changed, 70 insertions(+), 15 deletions(-)
 create mode 100644 ui-manchette/src/components/helpers.ts

diff --git a/ui-manchette/src/components/Manchette.tsx b/ui-manchette/src/components/Manchette.tsx
index 34cadf757..bd02733a0 100644
--- a/ui-manchette/src/components/Manchette.tsx
+++ b/ui-manchette/src/components/Manchette.tsx
@@ -6,9 +6,14 @@ import { ZoomIn, ZoomOut } from '@osrd-project/ui-icons';
 interface ManchetteProps {
   operationalPoints: OperationalPointType[];
   children?: React.ReactNode;
+  isProportionnal?: boolean;
 }
 
-const Manchette: React.FC<ManchetteProps> = ({ operationalPoints, children }) => {
+const Manchette: React.FC<ManchetteProps> = ({
+  operationalPoints,
+  children,
+  isProportionnal = false,
+}) => {
   const [zoom, setZoom] = React.useState(1);
 
   const zoomIn = () => {
@@ -22,7 +27,11 @@ const Manchette: React.FC<ManchetteProps> = ({ operationalPoints, children }) =>
   return (
     <div className="manchette flex">
       <div className="manchette-container">
-        <OperationalPointList operationalPoints={operationalPoints} zoom={zoom} />
+        <OperationalPointList
+          operationalPoints={operationalPoints}
+          zoom={zoom}
+          isProportionnal={isProportionnal}
+        />
         <div className="manchette-actions flex items-center">
           <div className=" flex items-center ">
             <button className="h-full px-3 w-full" onClick={zoomOut} disabled={zoom === 1}>
diff --git a/ui-manchette/src/components/OperationalPoint.tsx b/ui-manchette/src/components/OperationalPoint.tsx
index 38c7aca5a..233ce4a9b 100644
--- a/ui-manchette/src/components/OperationalPoint.tsx
+++ b/ui-manchette/src/components/OperationalPoint.tsx
@@ -1,14 +1,12 @@
 import React from 'react';
 import { OperationalPointType } from '../types/pathPropertiesTypes';
 import '@osrd-project/ui-core/dist/theme.css';
+import { positionKm } from './helpers';
 
 const OperationalPoint: React.FC<OperationalPointType> = ({ extensions, id, part, position }) => {
-  const positionKm = () => {
-    return Math.round((position / 1000000) * 10) / 10;
-  };
   return (
     <div className="flex op items-baseline" id={id}>
-      <div className="op-position justify-self-start text-end">{positionKm()}</div>
+      <div className="op-position justify-self-start text-end">{positionKm(position)}</div>
 
       <div className="op-name mr-2 ml-2 justify-self-start">{extensions?.identifier?.name}</div>
       <div className="op-separator"></div>
diff --git a/ui-manchette/src/components/OperationalPointList.tsx b/ui-manchette/src/components/OperationalPointList.tsx
index e1b4c8d29..52803c6da 100644
--- a/ui-manchette/src/components/OperationalPointList.tsx
+++ b/ui-manchette/src/components/OperationalPointList.tsx
@@ -1,7 +1,8 @@
-import React from 'react';
+import React, { useEffect } from 'react';
 import { OperationalPointType } from '../types/pathPropertiesTypes';
 import OperationalPoint from './OperationalPoint';
 import cx from 'classnames';
+import { positionKm } from './helpers';
 
 interface OperationalPointListProps {
   operationalPoints: OperationalPointType[];
@@ -15,23 +16,68 @@ const OperationalPointList: React.FC<OperationalPointListProps> = ({
   isProportionnal = false,
   zoom = 1,
 }) => {
-  const baseHeight = 24;
-  const operationalPointHeight = (op: OperationalPointType) => {
+  const [operationalPointsToDisplay, setOperationalPointsToDisplay] = React.useState<
+    OperationalPointType[]
+  >([]);
+  const baseHeight = 32;
+
+  const operationalPointStyle = (op: OperationalPointType, nextOp: OperationalPointType) => {
     if (isProportionnal) {
-      // WIP :  Ratio to find
-      return '100%';
+      if (!nextOp) {
+        return { height: `${baseHeight}px` };
+      } else {
+        return { height: `${positionKm(nextOp.position - op.position) * zoom * 8}px` };
+      }
     } else {
-      return baseHeight * zoom;
+      return { height: `${baseHeight * zoom}px` };
     }
   };
+
+  useEffect(() => {
+    const calcOperationalPointsToDisplay = () => {
+      if (isProportionnal) {
+        const result = operationalPoints.reduce(
+          (acc, nextOp) => {
+            const op = acc[acc.length - 1];
+            const diff = positionKm(nextOp.position - op.position);
+            if (diff * 8 * zoom >= baseHeight) {
+              acc.push(nextOp);
+            }
+            return acc;
+          },
+          [operationalPoints[0]]
+        );
+
+        const lastElement = operationalPoints[operationalPoints.length - 1];
+        if (result[result.length - 1] !== lastElement) {
+          result.push(lastElement);
+        }
+
+        const secondLastIndex = result.length - 2;
+        if (secondLastIndex >= 0) {
+          const secondLastElement = result[secondLastIndex];
+          const lastDiff = positionKm(lastElement.position - secondLastElement.position);
+          if (lastDiff * 8 * zoom < baseHeight) {
+            result.splice(secondLastIndex, 1);
+          }
+        }
+
+        return result;
+      } else {
+        return operationalPoints;
+      }
+    };
+    setOperationalPointsToDisplay(calcOperationalPointsToDisplay());
+  }, [operationalPoints, isProportionnal, zoom]);
+
   return (
     <div className="operational-point-list">
-      {operationalPoints.map((op, index, { length }) => (
+      {operationalPointsToDisplay.map((op, index) => (
         //WIP : length will be usefull for proportionnal display
         <div
           key={index}
           className={cx('operational-point-wrapper flex flex-col justify-start', {})}
-          style={{ height: operationalPointHeight(op) }}
+          style={operationalPointStyle(op, operationalPointsToDisplay[index + 1])}
         >
           <OperationalPoint {...op} />
         </div>
diff --git a/ui-manchette/src/components/helpers.ts b/ui-manchette/src/components/helpers.ts
new file mode 100644
index 000000000..c7407f228
--- /dev/null
+++ b/ui-manchette/src/components/helpers.ts
@@ -0,0 +1,3 @@
+export const positionKm = (position: number) => {
+  return Math.round((position / 1000000) * 10) / 10;
+};
diff --git a/ui-manchette/src/styles/operational-point-list.css b/ui-manchette/src/styles/operational-point-list.css
index 3ef9bf663..afa80b2f4 100644
--- a/ui-manchette/src/styles/operational-point-list.css
+++ b/ui-manchette/src/styles/operational-point-list.css
@@ -1,6 +1,5 @@
 .operational-point-list {
     width: 349px;
-    overflow: auto;
     border-bottom-left-radius: 0.25rem;
 
     @apply bg-ambientB-10;