Virtualized files list

jupyterlab_git/handlers.py

@@ -175,6 +175,9 @@ async def post(self):
         selected_hash = data["selected_hash"]
         current_path = data["current_path"]
         result = await self.git.detailed_log(selected_hash, current_path)
+
+        if result["code"] != 0:
+            self.set_status(500)
         self.finish(json.dumps(result))
 
 

package.json

@@ -73,6 +73,8 @@
     "react": "~16.9.0",
     "react-dom": "~16.9.0",
     "react-textarea-autosize": "^7.1.2",
+    "react-virtualized-auto-sizer": "^1.0.2",
+    "react-window": "^1.8.5",
     "typestyle": "^2.0.1"
   },
   "devDependencies": {
@@ -86,6 +88,8 @@
     "@types/react": "~16.8.13",
     "@types/react-dom": "~16.0.5",
     "@types/react-textarea-autosize": "^4.3.5",
+    "@types/react-virtualized-auto-sizer": "^1.0.0",
+    "@types/react-window": "^1.8.2",
     "@typescript-eslint/eslint-plugin": "^2.25.0",
     "@typescript-eslint/parser": "^2.25.0",
     "all-contributors-cli": "^6.14.0",

src/components/BranchMenu.tsx

@@ -3,6 +3,7 @@ import List from '@material-ui/core/List';
 import ListItem from '@material-ui/core/ListItem';
 import ClearIcon from '@material-ui/icons/Clear';
 import * as React from 'react';
+import { FixedSizeList, ListChildComponentProps } from 'react-window';
 import { classes } from 'typestyle';
 import {
   activeListItemClass,
@@ -12,7 +13,6 @@ import {
   filterWrapperClass,
   listItemClass,
   listItemIconClass,
-  listWrapperClass,
   newBranchButtonClass,
   wrapperClass
 } from '../style/BranchMenu';
@@ -24,6 +24,9 @@ import { SuspendModal } from './SuspendModal';
 
 const CHANGES_ERR_MSG =
   'The current branch contains files with uncommitted changes. Please commit or discard these changes before switching to or creating another branch.';
+const ITEM_HEIGHT = 24.8; // HTML element height for a single branch
+const MIN_HEIGHT = 150; // Minimal HTML element height for the branches list
+const MAX_HEIGHT = 400; // Maximal HTML element height for the branches list
 
 /**
  * Callback invoked upon encountering an error when switching branches.
@@ -237,37 +240,38 @@ export class BranchMenu extends React.Component<
    * @returns React element
    */
   private _renderBranchList(): React.ReactElement {
+    // Perform a "simple" filter... (TODO: consider implementing fuzzy filtering)
+    const filter = this.state.filter;
+    const branches = this.state.branches.filter(
+      branch => !filter || branch.name.includes(filter)
+    );
     return (
-      <div className={listWrapperClass}>
-        <List disablePadding>{this._renderItems()}</List>
-      </div>
+      <FixedSizeList
+        height={Math.min(
+          Math.max(MIN_HEIGHT, branches.length * ITEM_HEIGHT),
+          MAX_HEIGHT
+        )}
+        itemCount={branches.length}
+        itemData={branches}
+        itemKey={(index, data) => data[index].name}
+        itemSize={ITEM_HEIGHT}
+        style={{ overflowX: 'hidden', paddingTop: 0, paddingBottom: 0 }}
+        width={'auto'}
+      >
+        {this._renderItem}
+      </FixedSizeList>
     );
   }
 
-  /**
-   * Renders menu items.
-   *
-   * @returns array of React elements
-   */
-  private _renderItems(): React.ReactElement[] {
-    return this.state.branches.map(this._renderItem, this);
-  }
-
   /**
    * Renders a menu item.
    *
-   * @param branch - branch
-   * @param idx - item index
+   * @param props Row properties
    * @returns React element
    */
-  private _renderItem(
-    branch: Git.IBranch,
-    idx: number
-  ): React.ReactElement | null {
-    // Perform a "simple" filter... (TODO: consider implementing fuzzy filtering)
-    if (this.state.filter && !branch.name.includes(this.state.filter)) {
-      return null;
-    }
+  private _renderItem = (props: ListChildComponentProps): JSX.Element => {
+    const { data, index, style } = props;
+    const branch = data[index] as Git.IBranch;
     const isActive = branch.name === this.state.current;
     return (
       <ListItem
@@ -277,8 +281,8 @@ export class BranchMenu extends React.Component<
           listItemClass,
           isActive ? activeListItemClass : null
         )}
-        key={branch.name}
         onClick={this._onBranchClickFactory(branch.name)}
+        style={style}
       >
         <span
           className={classes(
@@ -290,7 +294,7 @@ export class BranchMenu extends React.Component<
         {branch.name}
       </ListItem>
     );
-  }
+  };
 
   /**
    * Renders a dialog for creating a new branch.

src/components/FileItem.tsx

@@ -25,29 +25,110 @@ export const STATUS_CODES = {
   '!': 'Ignored'
 };
 
+/**
+ * File marker properties
+ */
+interface IGitMarkBoxProps {
+  /**
+   * Filename
+   */
+  fname: string;
+  /**
+   * Git repository model
+   */
+  model: GitExtension;
+  /**
+   * File status
+   */
+  stage: Git.Status;
+}
+
+/**
+ * Render the selection box in simple mode
+ */
+class GitMarkBox extends React.PureComponent<IGitMarkBoxProps> {
+  protected _onClick = (): void => {
+    // toggle will emit a markChanged signal
+    this.props.model.toggleMark(this.props.fname);
+
+    // needed if markChanged doesn't force an update of a parent
+    this.forceUpdate();
+  };
+
+  protected _onDoubleClick = (
+    event: React.MouseEvent<HTMLInputElement>
+  ): void => {
+    event.stopPropagation();
+  };
+
+  render(): JSX.Element {
+    // idempotent, will only run once per file
+    this.props.model.addMark(
+      this.props.fname,
+      this.props.stage !== 'untracked'
+    );
+
+    return (
+      <input
+        name="gitMark"
+        className={gitMarkBoxStyle}
+        type="checkbox"
+        checked={this.props.model.getMark(this.props.fname)}
+        onChange={this._onClick}
+        onDoubleClick={this._onDoubleClick}
+      />
+    );
+  }
+}
+
+/**
+ * File item properties
+ */
 export interface IFileItemProps {
+  /**
+   * Action buttons on the file
+   */
   actions?: React.ReactElement;
+  /**
+   * Callback to open a context menu on the file
+   */
   contextMenu?: (file: Git.IStatusFile, event: React.MouseEvent) => void;
+  /**
+   * File model
+   */
   file: Git.IStatusFile;
+  /**
+   * Is the file marked?
+   */
   markBox?: boolean;
+  /**
+   * Git repository model
+   */
   model: GitExtension;
+  /**
+   * Callback on double click
+   */
   onDoubleClick: () => void;
+  /**
+   * Is the file selected?
+   */
   selected?: boolean;
+  /**
+   * Callback to select the file
+   */
   selectFile?: (file: Git.IStatusFile | null) => void;
+  /**
+   * Inline styling for the windowing
+   */
+  style: React.CSSProperties;
 }
 
-export interface IGitMarkBoxProps {
-  fname: string;
-  model: GitExtension;
-  stage: string;
-}
-
-export class FileItem extends React.Component<IFileItemProps> {
-  getFileChangedLabel(change: keyof typeof STATUS_CODES): string {
+export class FileItem extends React.PureComponent<IFileItemProps> {
+  protected _getFileChangedLabel(change: keyof typeof STATUS_CODES): string {
     return STATUS_CODES[change];
   }
 
-  getFileChangedLabelClass(change: string) {
+  protected _getFileChangedLabelClass(change: string): string {
     if (change === 'M') {
       return this.props.selected
         ? classes(
@@ -67,20 +148,20 @@ export class FileItem extends React.Component<IFileItemProps> {
     }
   }
 
-  getFileClass() {
+  protected _getFileClass(): string {
     return this.props.selected
       ? classes(fileStyle, selectedFileStyle)
       : fileStyle;
   }
 
-  render() {
+  render(): JSX.Element {
     const { file } = this.props;
     const status_code = file.status === 'staged' ? file.x : file.y;
-    const status = this.getFileChangedLabel(status_code as any);
+    const status = this._getFileChangedLabel(status_code as any);
 
     return (
       <li
-        className={this.getFileClass()}
+        className={this._getFileClass()}
         onClick={
           this.props.selectFile &&
           (() => this.props.selectFile(this.props.file))
@@ -92,6 +173,7 @@ export class FileItem extends React.Component<IFileItemProps> {
           })
         }
         onDoubleClick={this.props.onDoubleClick}
+        style={this.props.style}
         title={`${this.props.file.to} ● ${status}`}
       >
         {this.props.markBox && (
@@ -106,47 +188,10 @@ export class FileItem extends React.Component<IFileItemProps> {
           selected={this.props.selected}
         />
         {this.props.actions}
-        <span className={this.getFileChangedLabelClass(this.props.file.y)}>
+        <span className={this._getFileChangedLabelClass(this.props.file.y)}>
           {this.props.file.y === '?' ? 'U' : status_code}
         </span>
       </li>
     );
   }
 }
-
-export class GitMarkBox extends React.Component<IGitMarkBoxProps> {
-  constructor(props: IGitMarkBoxProps) {
-    super(props);
-  }
-
-  protected _onClick = (event: React.ChangeEvent<HTMLInputElement>) => {
-    // toggle will emit a markChanged signal
-    this.props.model.toggleMark(this.props.fname);
-
-    // needed if markChanged doesn't force an update of a parent
-    this.forceUpdate();
-  };
-
-  protected _onDoubleClick = (event: React.MouseEvent<HTMLInputElement>) => {
-    event.stopPropagation();
-  };
-
-  render() {
-    // idempotent, will only run once per file
-    this.props.model.addMark(
-      this.props.fname,
-      this.props.stage !== 'untracked'
-    );
-
-    return (
-      <input
-        name="gitMark"
-        className={gitMarkBoxStyle}
-        type="checkbox"
-        checked={this.props.model.getMark(this.props.fname)}
-        onChange={this._onClick}
-        onDoubleClick={this._onDoubleClick}
-      />
-    );
-  }
-}