Introduce expandable diffs

scm-ui/ui-components/src/repos/DiffExpander.test.ts

@@ -0,0 +1,312 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import DiffExpander from "./DiffExpander";
+
+const HUNK_0 = {
+  content: "@@ -1,8 +1,8 @@",
+  oldStart: 1,
+  newStart: 1,
+  oldLines: 8,
+  newLines: 8,
+  changes: [
+    {
+      content: "// @flow",
+      type: "normal",
+      oldLineNumber: 1,
+      newLineNumber: 1,
+      isNormal: true
+    },
+    {
+      content: 'import React from "react";',
+      type: "normal",
+      oldLineNumber: 2,
+      newLineNumber: 2,
+      isNormal: true
+    },
+    {
+      content: 'import { translate } from "react-i18next";',
+      type: "delete",
+      lineNumber: 3,
+      isDelete: true
+    },
+    {
+      content: 'import { Textarea } from "@scm-manager/ui-components";',
+      type: "delete",
+      lineNumber: 4,
+      isDelete: true
+    },
+    {
+      content: 'import type { Me } from "@scm-manager/ui-types";',
+      type: "delete",
+      lineNumber: 5,
+      isDelete: true
+    },
+    {
+      content: 'import {translate} from "react-i18next";',
+      type: "insert",
+      lineNumber: 3,
+      isInsert: true
+    },
+    {
+      content: 'import {Textarea} from "@scm-manager/ui-components";',
+      type: "insert",
+      lineNumber: 4,
+      isInsert: true
+    },
+    {
+      content: 'import type {Me} from "@scm-manager/ui-types";',
+      type: "insert",
+      lineNumber: 5,
+      isInsert: true
+    },
+    {
+      content: 'import injectSheet from "react-jss";',
+      type: "normal",
+      oldLineNumber: 6,
+      newLineNumber: 6,
+      isNormal: true
+    },
+    {
+      content: "",
+      type: "normal",
+      oldLineNumber: 7,
+      newLineNumber: 7,
+      isNormal: true
+    },
+    {
+      content: "const styles = {",
+      type: "normal",
+      oldLineNumber: 8,
+      newLineNumber: 8,
+      isNormal: true
+    }
+  ]
+};
+const HUNK_1 = {
+  content: "@@ -14,6 +14,7 @@",
+  oldStart: 14,
+  newStart: 14,
+  oldLines: 6,
+  newLines: 7,
+  changes: [
+    {
+      content: "type Props = {",
+      type: "normal",
+      oldLineNumber: 14,
+      newLineNumber: 14,
+      isNormal: true
+    },
+    {
+      content: "  me: Me,",
+      type: "normal",
+      oldLineNumber: 15,
+      newLineNumber: 15,
+      isNormal: true
+    },
+    {
+      content: "  onChange: string => void,",
+      type: "normal",
+      oldLineNumber: 16,
+      newLineNumber: 16,
+      isNormal: true
+    },
+    {
+      content: "  disabled: boolean,",
+      type: "insert",
+      lineNumber: 17,
+      isInsert: true
+    },
+    {
+      content: "  //context props",
+      type: "normal",
+      oldLineNumber: 17,
+      newLineNumber: 18,
+      isNormal: true
+    },
+    {
+      content: "  t: string => string,",
+      type: "normal",
+      oldLineNumber: 18,
+      newLineNumber: 19,
+      isNormal: true
+    },
+    {
+      content: "  classes: any",
+      type: "normal",
+      oldLineNumber: 19,
+      newLineNumber: 20,
+      isNormal: true
+    }
+  ]
+};
+const HUNK_2 = {
+  content: "@@ -21,7 +22,7 @@",
+  oldStart: 21,
+  newStart: 22,
+  oldLines: 7,
+  newLines: 7,
+  changes: [
+    {
+      content: "",
+      type: "normal",
+      oldLineNumber: 21,
+      newLineNumber: 22,
+      isNormal: true
+    },
+    {
+      content: "class CommitMessage extends React.Component<Props> {",
+      type: "normal",
+      oldLineNumber: 22,
+      newLineNumber: 23,
+      isNormal: true
+    },
+    {
+      content: "  render() {",
+      type: "normal",
+      oldLineNumber: 23,
+      newLineNumber: 24,
+      isNormal: true
+    },
+    {
+      content: "    const { t, classes, me, onChange } = this.props;",
+      type: "delete",
+      lineNumber: 24,
+      isDelete: true
+    },
+    {
+      content: "    const {t, classes, me, onChange, disabled} = this.props;",
+      type: "insert",
+      lineNumber: 25,
+      isInsert: true
+    },
+    {
+      content: "    return (",
+      type: "normal",
+      oldLineNumber: 25,
+      newLineNumber: 26,
+      isNormal: true
+    },
+    {
+      content: "      <>",
+      type: "normal",
+      oldLineNumber: 26,
+      newLineNumber: 27,
+      isNormal: true
+    },
+    {
+      content: "        <div className={classes.marginBottom}>",
+      type: "normal",
+      oldLineNumber: 27,
+      newLineNumber: 28,
+      isNormal: true
+    }
+  ]
+};
+const HUNK_3 = {
+  content: "@@ -33,6 +34,7 @@",
+  oldStart: 33,
+  newStart: 34,
+  oldLines: 6,
+  newLines: 7,
+  changes: [
+    {
+      content: "        <Textarea",
+      type: "normal",
+      oldLineNumber: 33,
+      newLineNumber: 34,
+      isNormal: true
+    },
+    {
+      content: '          placeholder={t("scm-editor-plugin.commit.placeholder")}',
+      type: "normal",
+      oldLineNumber: 34,
+      newLineNumber: 35,
+      isNormal: true
+    },
+    {
+      content: "          onChange={message => onChange(message)}",
+      type: "normal",
+      oldLineNumber: 35,
+      newLineNumber: 36,
+      isNormal: true
+    },
+    {
+      content: "          disabled={disabled}",
+      type: "insert",
+      lineNumber: 37,
+      isInsert: true
+    },
+    {
+      content: "        />",
+      type: "normal",
+      oldLineNumber: 36,
+      newLineNumber: 38,
+      isNormal: true
+    },
+    {
+      content: "      </>",
+      type: "normal",
+      oldLineNumber: 37,
+      newLineNumber: 39,
+      isNormal: true
+    },
+    {
+      content: "    );",
+      type: "normal",
+      oldLineNumber: 38,
+      newLineNumber: 40,
+      isNormal: true
+    }
+  ]
+};
+const TEST_CONTENT = {
+  oldPath: "src/main/js/CommitMessage.js",
+  newPath: "src/main/js/CommitMessage.js",
+  oldEndingNewLine: true,
+  newEndingNewLine: true,
+  oldRevision: "e05c8495bb1dc7505d73af26210c8ff4825c4500",
+  newRevision: "4305a8df175b7bec25acbe542a13fbe2a718a608",
+  type: "modify",
+  language: "javascript",
+  hunks: [HUNK_0, HUNK_1, HUNK_2, HUNK_3],
+  _links: {
+    lines: {
+      href:
+        "http://localhost:8081/scm/api/v2/repositories/scm-manager/scm-editor-plugin/content/f7a23064f3f2418f26140a9545559e72d595feb5/src/main/js/CommitMessage.js?start={start}?end={end}",
+      templated: true
+    }
+  }
+};
+
+describe("diff expander", () => {
+  const diffExpander = new DiffExpander(TEST_CONTENT);
+  it("should have hunk count from origin", () => {
+    expect(diffExpander.hunkCount()).toBe(4);
+  });
+
+  it("should return correct hunk", () => {
+    expect(diffExpander.getHunk(1).hunk).toBe(HUNK_1);
+  });
+});

scm-ui/ui-components/src/repos/DiffExpander.ts

@@ -0,0 +1,61 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import { File, Hunk } from "./DiffTypes";
+
+class DiffExpander {
+  file: File;
+
+  constructor(file: File) {
+    this.file = file;
+  }
+
+  hunkCount = () => {
+    return this.file.hunks.length;
+  };
+
+  getHunk: (n: number) => ExpandableHunk = (n: number) => {
+    return {
+      maxExpandHeadRange: 10,
+      maxExpandBottomRange: 10,
+      expandHead: () => {
+        console.log("expand head", n);
+      },
+      expandBottom: () => {
+        console.log("expand bottom", n);
+      },
+      hunk: this.file.hunks[n]
+    };
+  };
+}
+
+export type ExpandableHunk = {
+  hunk: Hunk;
+  maxExpandHeadRange: number;
+  maxExpandBottomRange: number;
+  expandHead: () => void;
+  expandBottom: () => void;
+};
+
+export default DiffExpander;

scm-ui/ui-components/src/repos/DiffFile.tsx

@@ -34,6 +34,7 @@ import { Change, ChangeEvent, DiffObjectProps, File, Hunk as HunkType } from "./
 import TokenizedDiffView from "./TokenizedDiffView";
 import DiffButton from "./DiffButton";
 import { MenuContext } from "@scm-manager/ui-components";
+import DiffExpander, { ExpandableHunk } from "./DiffExpander";
 
 const EMPTY_ANNOTATION_FACTORY = {};
 
@@ -48,6 +49,7 @@ type Collapsible = {
 
 type State = Collapsible & {
   sideBySide?: boolean;
+  diffExpander: DiffExpander;
 };
 
 const DiffFilePanel = styled.div`
@@ -74,8 +76,9 @@ const ButtonWrapper = styled.div`
   margin-left: auto;
 `;
 
-const HunkDivider = styled.hr`
+const HunkDivider = styled.div`
-  margin: 0.5rem 0;
+  background: #33b2e8;
+  font-size: 0.7rem;
 `;
 
 const ChangeTypeTag = styled(Tag)`
@@ -92,7 +95,8 @@ class DiffFile extends React.Component<Props, State> {
     super(props);
     this.state = {
       collapsed: this.defaultCollapse(),
-      sideBySide: props.sideBySide
+      sideBySide: props.sideBySide,
+      diffExpander: new DiffExpander(props.file)
     };
   }
 
@@ -139,9 +143,25 @@ class DiffFile extends React.Component<Props, State> {
     });
   };
 
-  createHunkHeader = (hunk: HunkType, i: number) => {
+  createHunkHeader = (expandableHunk: ExpandableHunk) => {
-    if (i > 0) {
+    if (expandableHunk.maxExpandHeadRange > 0) {
-      return <HunkDivider />;
+      return (
+        <Decoration>
+          <HunkDivider onClick={expandableHunk.expandHead}>{"Load first n lines"}</HunkDivider>
+        </Decoration>
+      );
+    }
+    // hunk header must be defined
+    return <span />;
+  };
+
+  createHunkFooter = (expandableHunk: ExpandableHunk) => {
+    if (expandableHunk.maxExpandBottomRange > 0) {
+      return (
+        <Decoration>
+          <HunkDivider onClick={expandableHunk.expandBottom}>{"Load last n lines"}</HunkDivider>
+        </Decoration>
+      );
     }
     // hunk header must be defined
     return <span />;
@@ -183,19 +203,27 @@ class DiffFile extends React.Component<Props, State> {
     }
   };
 
-  renderHunk = (hunk: HunkType, i: number) => {
+  renderHunk = (file: File, expandableHunk: ExpandableHunk, i: number) => {
+    const hunk = expandableHunk.hunk;
     if (this.props.markConflicts && hunk.changes) {
       this.markConflicts(hunk);
     }
-    return [
+    const items = [];
-      <Decoration key={"decoration-" + hunk.content}>{this.createHunkHeader(hunk, i)}</Decoration>,
+    if (file._links?.lines) {
+      items.push(this.createHunkHeader(expandableHunk));
+    }
+    items.push(
       <Hunk
         key={"hunk-" + hunk.content}
-        hunk={hunk}
+        hunk={expandableHunk.hunk}
         widgets={this.collectHunkAnnotations(hunk)}
         gutterEvents={this.createGutterEvents(hunk)}
       />
-    ];
+    );
+    if (file._links?.lines) {
+      items.push(this.createHunkFooter(expandableHunk));
+    }
+    return items;
   };
 
   markConflicts = (hunk: HunkType) => {
@@ -251,19 +279,11 @@ class DiffFile extends React.Component<Props, State> {
     return <ChangeTypeTag className={classNames("is-rounded", "has-text-weight-normal")} color={color} label={value} />;
   };
 
-  concat = (array: object[][]) => {
-    if (array.length > 0) {
-      return array.reduce((a, b) => a.concat(b));
-    } else {
-      return [];
-    }
-  };
-
   hasContent = (file: File) => file && !file.isBinary && file.hunks && file.hunks.length > 0;
 
   render() {
     const { file, fileControlFactory, fileAnnotationFactory, t } = this.props;
-    const { collapsed, sideBySide } = this.state;
+    const { collapsed, sideBySide, diffExpander } = this.state;
     const viewType = sideBySide ? "split" : "unified";
 
     let body = null;
@@ -275,7 +295,7 @@ class DiffFile extends React.Component<Props, State> {
         <div className="panel-block is-paddingless">
           {fileAnnotations}
           <TokenizedDiffView className={viewType} viewType={viewType} file={file}>
-            {(hunks: HunkType[]) => this.concat(hunks.map(this.renderHunk))}
+            {(hunks: HunkType[]) => hunks.map((hunk, n) => this.renderHunk(file, diffExpander.getHunk(n), n))}
           </TokenizedDiffView>
         </div>
       );

scm-ui/ui-components/src/repos/DiffTypes.ts

@@ -24,6 +24,7 @@
 
 import { ReactNode } from "react";
 import { DefaultCollapsed } from "./defaultCollapsed";
+import { Links } from "@scm-manager/ui-types";
 
 // We place the types here and not in @scm-manager/ui-types,
 // because they represent not a real scm-manager related type.
@@ -46,11 +47,16 @@ export type File = {
   language?: string;
   // TODO does this property exists?
   isBinary?: boolean;
+  _links: Links;
 };
 
 export type Hunk = {
   changes: Change[];
   content: string;
+  oldStart: number;
+  newStart: number;
+  oldLines: number;
+  newLines: number;
 };
 
 export type ChangeType = "insert" | "delete" | "normal" | "conflict";